U.S. patent application number 14/758737 was filed with the patent office on 2016-02-04 for connecting rod type two-level locking device, hopper car bottom door and hopper car.
The applicant listed for this patent is CSR YANGZE CO., LTD.. Invention is credited to Tiejun FU, Qiangjun JIANG, Ruijin JIANG, Liangcai LIN, Fengwei LIU, Wenliang LIU, Chunjiang SHI, Mingdao SUN, Chuqiang TANG, Baolei WANG.
Application Number | 20160031454 14/758737 |
Document ID | / |
Family ID | 50006994 |
Filed Date | 2016-02-04 |
United States Patent
Application |
20160031454 |
Kind Code |
A1 |
SHI; Chunjiang ; et
al. |
February 4, 2016 |
Connecting Rod Type Two-Level Locking Device, Hopper Car Bottom
Door and Hopper Car
Abstract
The present invention discloses a connecting rod type two-level
locking device, a hopper car bottom door and a hopper car, and
belongs to the technical field of rail wagons. The connecting rod
type two-level locking device includes a transmission shaft, a door
opening arm, a first roller, a second roller, a first locating pin,
a standstill locking disk and a linkage mechanism. The hopper car
bottom door includes the connecting rod type two-level locking
device. The hopper car includes the bottom door. Even if the
connecting rod type two-level locking device is accidentally
stressed, the linkage mechanism cannot rotate, and at this time,
the slave arm cannot rotate neither. The accidental opening of the
hopper car bottom door can be avoided. The hopper car is more
reliable to use.
Inventors: |
SHI; Chunjiang; (Wuhan,
CN) ; SUN; Mingdao; (Wuhan, CN) ; JIANG;
Qiangjun; (Wuhan, CN) ; LIU; Fengwei; (Wuhan,
CN) ; WANG; Baolei; (Wuhan, CN) ; LIU;
Wenliang; (Wuhan, CN) ; TANG; Chuqiang;
(Wuhan, CN) ; JIANG; Ruijin; (Wuhan, CN) ;
LIN; Liangcai; (Wuhan, CN) ; FU; Tiejun;
(Wuhan, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CSR YANGZE CO., LTD. |
Wuhan, Hubei |
|
CN |
|
|
Family ID: |
50006994 |
Appl. No.: |
14/758737 |
Filed: |
November 6, 2014 |
PCT Filed: |
November 6, 2014 |
PCT NO: |
PCT/CN2014/090411 |
371 Date: |
June 30, 2015 |
Current U.S.
Class: |
105/280 ;
192/30R; 192/82R |
Current CPC
Class: |
F16D 19/00 20130101;
B61D 7/16 20130101; B61D 7/02 20130101; B61D 7/26 20130101 |
International
Class: |
B61D 7/16 20060101
B61D007/16; B61D 7/02 20060101 B61D007/02; B61D 7/26 20060101
B61D007/26; F16D 19/00 20060101 F16D019/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 15, 2013 |
CN |
201310571352.8 |
Claims
1. A two-level locking device, comprising; a first transmission
shaft; a second transmission shaft; a clutch; a pressure mechanism;
and a reset mechanism; wherein under the pressure action of the
pressure mechanism, the clutch separates the first transmission
shaft from the second transmission shaft, and under the action of
the reset mechanism, the clutch joints the first transmission shaft
with the second transmission shaft.
2. The device of claim 1, wherein the clutch comprises a locking
key limiting seat and a locking key, wherein the locking key
limiting seat is fixedly connected to the first transmission shaft,
the locking key is fixedly connected to the second transmission
shaft, and the pressure mechanism can apply a pressure to the
locking key to deviate the locking key from the key slot of the
locking key limiting seat, so that the first transmission shaft is
separated from the second transmission shaft; the reset mechanism
can apply a force to the locking key to insert the locking key into
the locking key limiting seat again, so that the first transmission
shaft and the second transmission shaft are re jointed to
reset.
3. The device of claim 1, wherein the pressure mechanism comprises
a pressure lever, a first bent lever, a first rotating shaft, a
force application arm and a force application unit, wherein the
pressure lever comprises an end M and an end N, the first bent
lever comprises an end A and an end B, the end M of the pressure
lever is hinged with the locking key, the end A of the first bent
lever is connected to the end N of the pressure lever, the first
bent lever is connected to the force application arm through the
first rotating shaft, the force application unit can apply an
upward acting force to the end B of the first bent lever, such that
the first bent lever rotates clockwise with the first rotating
shaft as the shaft to propel the pressure lever to move rightwards,
and the pressure lever applies a rightward acting force to the
locking key to deviate the locking key from the key slot of the
locking key limiting seat, so that the first transmission shaft is
separated from the second transmission shaft.
4. The device of claim 3, wherein the force application unit
comprises a first roller, a first locating pin and a first
connecting piece, wherein a first through hole and a first slotted
hole are formed on the force application arm, a second through hole
and a third through hole are formed on the first connecting piece,
a fourth through hole is formed on the first roller, the end B of
the first bent lever sequentially penetrates through the first
through hole and the second through hole, the first locating pin is
inserted in the second through hole, the fourth through hole and
the first slotted hole, when the first locating pin is located at a
lower semicircle of the first slotted hole, a lower edge of the
first roller protrudes from the force application arm to apply an
upward acting force to the first roller, the first roller drives
the first locating pin to move upwards, the first locating pin
drives the first connecting piece to move upwards, and the first
connecting piece applies an upward acting force to the end B of the
first bent lever, until the first locating pin arrives at the upper
semicircle of the first slotted hole.
5. The device of claim 1, wherein the reset mechanism comprises a
pull rod, a stop dog, an elastic component, a second bent lever, a
second rotating shaft, a third rotating shaft, a plug, a reset arm
and a limiting unit, wherein the pull rod comprises an end P and an
end Q, the second bent lever comprises an end C and an end D, the
end P of the pull rod is hinged with the locking key, the end Q of
the pull rod is connected to the end C of the second bent lever
through the third rotating shaft, the second bent lever is
connected to the reset arm through the second rotating shaft, a
holding space for the movement of the end Q of the pull rod, the
third rotating shaft and the end C of the second bent lever is
arranged in the plug, the stop dog is fixedly connected to the pull
rod, one end of the elastic component is fixedly connected to the
stop dog, the other end of the elastic component is fixedly
connected to the plug, when the locking key is jointed with the
locking key limiting seat, the reset arm can prevent the second
bent lever from rotating counterclockwise with the second rotating
shaft as the shaft, and at this time, the elastic component is at a
tensile state.
6. The device of claim 5, wherein the limiting unit comprises a
second roller, a second locating pin and a second connecting piece,
wherein a fifth through hole and a second slotted hole are formed
on the reset arm, a sixth through hole and a seventh through hole
are formed on the second connecting piece, an eighth through hole
is formed on the second roller, the end D of the second bent lever
sequentially penetrates through the fifth through hole and the
sixth through hole, the second locating pin is inserted in the
sixth through hole, the eighth through hole and the second slotted
hole, when the locking key is jointed with the locking key limiting
seat, the second locating pin is located at the upper semicircle of
the second slotted hole, and the upper semicircle of the second
slotted hole prevents the second locating pin from moving upwards
to prevent the second connecting piece from moving upwards, so as
to prevent the second bent lever from rotating counterclockwise
with the second rotating shaft as the shaft.
7. A hopper car bottom door, comprising: a two-level locking device
comprising a first transmission shaft, a second transmission shaft,
a clutch, a pressure mechanism comprising at least a force
application arm, and a reset mechanism comprising at least a reset
arm, wherein under the pressure action of the pressure mechanism,
the clutch separates the first transmission shaft from the second
transmission shaft, and under the action of the reset mechanism,
the clutch joints the first transmission shaft with the second
transmission shaft; and wherein the force application arm is a
first door opening and closing arm of the hopper car bottom door,
and the reset arm is a second door opening and closing arm of the
hopper car bottom door.
8. The hopper car bottom door of claim 7, wherein the clutch
comprises a locking key limiting seat and a locking key, wherein
the locking key limiting seat is fixedly connected to the first
transmission shaft, the locking key is fixedly connected to the
second transmission shaft, and the pressure mechanism can apply a
pressure to the locking key to deviate the locking key from the key
slot of the locking key limiting seat, so that the first
transmission shaft is separated from the second transmission shaft;
the reset mechanism can apply a force to the locking key to insert
the locking key into the locking key limiting seat again, so that
the first transmission shaft and the second transmission shaft are
re-jointed to reset.
9. The hopper car bottom door of claim 7, wherein the pressure
mechanism further comprises a pressure lever, a first bent lever, a
first rotating shaft, and a force application unit, wherein the
pressure lever comprises an end M and an end N, the first bent
lever comprises an end A and an end B, the end M of the pressure
lever is hinged with the locking key, the end A of the first bent
lever is connected to the end N of the pressure lever, the first
bent lever is connected to the force application arm through the
first rotating shaft, the force application unit can apply an
upward acting force to the end B of the first bent lever, such that
the first bent lever rotates clockwise with the first rotating
shaft as the shaft to propel the pressure lever to move rightwards,
and the pressure lever applies a rightward acting force to the
locking key to deviate the locking key from the key slot of the
locking key limiting seat, so that the first transmission shaft is
separated from the second transmission shaft.
10. The hopper car bottom door of claim 9, wherein the force
application unit comprises a first roller, a first locating pin and
a first connecting piece, wherein a first through hole and a first
slotted hole are formed on the force application arm, a second
through hole and a third through hole are formed on the first
connecting piece, a fourth through hole is formed on the first
roller, the end B of the first bent lever sequentially penetrates
through the first through hole and the second through hole, the
first locating pin is inserted in the second through hole, the
fourth through hole and the first slotted hole, when the first
locating pin is located at a lower semicircle of the first slotted
hole, a lower edge of the first roller protrudes from the force
application arm to apply an upward acting force to the first
roller, the first roller drives the first locating pin to move
upwards, the first locating pin drives the first connecting piece
to move upwards, and the first connecting piece applies an upward
acting force to the end B of the first bent lever, until the first
locating pin arrives at the upper semicircle of the first slotted
hole.
11. The hopper car bottom door of claim 7, wherein the reset
mechanism further comprises a pull rod, a stop dog, an elastic
component, a second bent lever, a second rotating shaft, a third
rotating shaft, a plug, and a limiting unit, wherein the pull rod
comprises an end P and an end Q, the second bent lever comprises an
end C and an end D, the end P of the pull rod is hinged with the
locking key, the end Q of the pull rod is connected to the end C of
the second bent lever through the third rotating shaft, the second
bent lever is connected to the reset arm through the second
rotating shaft, a holding space for the movement of the end Q of
the pull rod, the third rotating shaft and the end C of the second
bent lever is arranged in the plug, the stop dog is fixedly
connected to the pull rod, one end of the elastic component is
fixedly connected to the stop dog, the other end of the elastic
component is fixedly connected to the plug, when the locking key is
jointed with the locking key limiting seat, the reset arm can
prevent the second bent lever from rotating counterclockwise with
the second rotating shaft as the shaft, and at this time, the
elastic component is at a tensile state.
12. The hopper car bottom door of claim 11, wherein the limiting
unit comprises a second roller, a second locating pin and a second
connecting piece, wherein a fifth through hole and a second slotted
hole are formed on the reset arm, a sixth through hole and a
seventh through hole are formed on the second connecting piece, an
eighth through hole is formed on the second roller, the end D of
the second bent lever sequentially penetrates through the fifth
through hole and the sixth through hole, the second locating pin is
inserted in the sixth through hole, the eighth through hole and the
second slotted hole, when the locking key is jointed with the
locking key limiting seat, the second locating pin is located at
the upper semicircle of the second slotted hole, and the upper
semicircle of the second slotted hole prevents the second locating
pin from moving upwards to prevent the second connecting piece from
moving upwards, so as to prevent the second bent lever from
rotating counterclockwise with the second rotating shaft as the
shaft.
13. A hopper car, comprising: a hopper car bottom door including a
two-level locking device a first transmission shaft, a second
transmission shaft, a clutch, a pressure mechanism comprising at
least a force application arm, and a reset mechanism comprising at
least a reset arm, wherein under the pressure action of the
pressure mechanism, the clutch separates the first transmission
shaft from the second transmission shaft, and under the action of
the reset mechanism, the clutch joints the first transmission shaft
with the second transmission shaft; and wherein the force
application arm is a first door opening and closing arm of the
hopper car bottom door, and the reset arm is a second door opening
and closing arm of the hopper car bottom door.
14. The hopper car of claim 13, wherein the clutch comprises a
locking key limiting seat and a locking key, wherein the locking
key limiting seat is fixedly connected to the first transmission
shaft, the locking key is fixedly connected to the second
transmission shaft, and the pressure mechanism can apply a pressure
to the locking key to deviate the locking key from the key slot of
the locking key limiting seat, so that the first transmission shaft
is separated from the second transmission shaft; the reset
mechanism can apply a force to the locking key to insert the
locking key into the locking key limiting seat again, so that the
first transmission shaft and the second transmission shaft are re
jointed to reset.
15. The hopper car of claim 13, wherein the pressure mechanism
further comprises a pressure lever, a first bent lever, a first
rotating shaft, and a force application unit, wherein the pressure
lever comprises an end M and an end N, the first bent lever
comprises an end A and an end B, the end M of the pressure lever is
hinged with the locking key, the end A of the first bent lever is
connected to the end N of the pressure lever, the first bent lever
is connected to the force application arm through the first
rotating shaft, the force application unit can apply an upward
acting force to the end B of the first bent lever, such that the
first bent lever rotates clockwise with the first rotating shaft as
the shaft to propel the pressure lever to move rightwards, and the
pressure lever applies a rightward acting force to the locking key
to deviate the locking key from the key slot of the locking key
limiting seat, so that the first transmission shaft is separated
from the second transmission shaft.
16. The hopper car of claim 15, wherein the force application unit
comprises a first roller, a first locating pin and a first
connecting piece, wherein a first through hole and a first slotted
hole are formed on the force application arm, a second through hole
and a third through hole are formed on the first connecting piece,
a fourth through hole is formed on the first roller, the end B of
the first bent lever sequentially penetrates through the first
through hole and the second through hole, the first locating pin is
inserted in the second through hole, the fourth through hole and
the first slotted hole, when the first locating pin is located at a
lower semicircle of the first slotted hole, a lower edge of the
first roller protrudes from the force application arm to apply an
upward acting force to the first roller, the first roller drives
the first locating pin to move upwards, the first locating pin
drives the first connecting piece to move upwards, and the first
connecting piece applies an upward acting force to the end B of the
first bent lever, until the first locating pin arrives at the upper
semicircle of the first slotted hole.
17. The hopper car of claim 13, wherein the reset mechanism further
comprises a pull rod, a stop dog, an elastic component, a second
bent lever, a second rotating shaft, a third rotating shaft, a
plug, and a limiting unit, wherein the pull rod comprises an end P
and an end Q, the second bent lever comprises an end C and an end
D, the end P of the pull rod is hinged with the locking key, the
end Q of the pull rod is connected to the end C of the second bent
lever through the third rotating shaft, the second bent lever is
connected to the reset arm through the second rotating shaft, a
holding space for the movement of the end Q of the pull rod, the
third rotating shaft and the end C of the second bent lever is
arranged in the plug, the stop dog is fixedly connected to the pull
rod, one end of the elastic component is fixedly connected to the
stop dog, the other end of the elastic component is fixedly
connected to the plug, when the locking key is jointed with the
locking key limiting seat, the reset arm can prevent the second
bent lever from rotating counterclockwise with the second rotating
shaft as the shaft, and at this time, the elastic component is at a
tensile state.
18. The hopper car of claim 17, wherein the limiting unit comprises
a second roller, a second locating pin and a second connecting
piece, wherein a fifth through hole and a second slotted hole are
formed on the reset arm, a sixth through hole and a seventh through
hole are formed on the second connecting piece, an eighth through
hole is formed on the second roller, the end D of the second bent
lever sequentially penetrates through the fifth through hole and
the sixth through hole, the second locating pin is inserted in the
sixth through hole, the eighth through hole and the second slotted
hole, when the locking key is jointed with the locking key limiting
seat, the second locating pin is located at the upper semicircle of
the second slotted hole, and the upper semicircle of the second
slotted hole prevents the second locating pin from moving upwards
to prevent the second connecting piece from moving upwards, so as
to prevent the second bent lever from rotating counterclockwise
with the second rotating shaft as the shaft.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to the technical field of rail
wagons, and particularly relates to a connecting rod type two-level
locking device, a hopper car bottom door and a hopper car.
BACKGROUND OF THE INVENTION
[0002] Most existing railroad hopper cars adopt box type bottom
door structures, and bottom doors are controlled by bottom door
opening and closing mechanisms to open and close to achieve an
automatic unloading function. Under this structure, the opening,
closing and locking of the bottom doors completely depend on the
control of the bottom door opening and closing mechanisms. In the
case of failure of the bottom door opening and closing mechanisms,
the bottom doors are out of effective control and are completely at
a free rotation state, and the bottom doors are liable to
automatically open due to vibration in a vehicle operation process,
resulting in commodity leakage or automatic unloading to affect the
traffic safety.
[0003] The bottom door opening and closing mechanisms are key
components for ensuring the normal unloading of the railroad hopper
cars and require convenient opening and closing operations and
stable performance, and the existing mechanical impact
self-unloading type bottom door opening and closing mechanisms have
the above characteristics, thus being widely used on the railroad
hopper cars at home and abroad at present. Moreover, corresponding
self-locking devices are provided to prevent automatic opening of
the bottom doors due to such reasons as vibration and the like or
abnormal opening of the bottom doors caused by other factors in a
transportation process.
[0004] However, the current two-level locking solutions of the
hopper cars adopting the mechanical impact self-unloading type
bottom door opening and closing mechanisms are based on the locking
operation handle principle, which has relatively limited
adaptability and cannot meet the requirements of bilaterally
opening and closing the bottom doors.
SUMMARY OF THE INVENTION
[0005] To solve the above problems, the present invention provides
a connecting rod type two-level locking device arranged on a hopper
car bottom door, which is opened and closed by a planar four-bar
linkage passing a dead point, a hopper car bottom door including
the connecting rod type two-level locking device and a hopper car
including the bottom door.
[0006] The connecting rod type two-level locking device provided by
the present invention includes a transmission shaft, a door opening
arm, a first roller, a second roller, a first locating pin, a
standstill locking disk and a linkage mechanism, wherein the door
opening arm includes a master arm and a slave arm, a slotted hole
is formed on one end of the master arm, the other end of the master
arm is fixedly connected to the transmission shaft, the first
locating pin is fixedly connected to the first roller, the first
roller forms a sliding pair with the slotted hole through the first
locating pin, the second roller is hinged with one end of the slave
arm, and the other end of the slave arm is fixedly connected to the
transmission shaft;
the standstill locking disk is fixedly connected to the
transmission shaft, and convex teeth are arranged at the bottom end
of the standstill locking disk; the linkage mechanism includes an
unlocking lever, an unlocking connecting rod and a linkage locking
pawl, the unlocking lever is provided with an end a and an end b,
the unlocking connecting rod is provided with an end c and an end
d, the linkage locking pawl is provided with an end m and an end n,
the end b of the unlocking lever is hinged with the end c of the
unlocking connecting rod, and the end d of the unlocking connecting
rod is hinged with the end m of the linkage locking pawl; the
middle position of the unlocking lever is hinged with the master
arm, the end a of the unlocking lever is lapped on the first
roller, and the end n of the linkage locking pawl is hinged with
the slave arm; in general, the first locating pin is located at the
lower semicircle of the slotted hole, at this time, the end m of
the linkage locking pawl abuts against the convex teeth, and the
connecting rod type two-level locking device is a truss; when the
first roller is applied with an upward acting force, the first
roller is driven by the first locating pin to slide upwards in the
slotted hole, when the first locating pin is located at the upper
semicircle of the slotted hole, the end m of the linkage locking
pawl deviates from the convex teeth, at this time, a force is
continuously applied to the first roller, and the slave arm moves
together with the master arm and the linkage mechanism.
[0007] Preferably, the connecting rod type two-level locking device
further includes a torsion spring, wherein the torsion spring is
sleeved on the hinge point of the end n of the linkage locking pawl
and the slave arm in an intercrossing manner, one end of the
torsion spring is fixedly connected to the slave arm, the other end
of the torsion spring is fixedly connected to the linkage locking
pawl, and the torsion spring can provide a standstill locking force
to the linkage mechanism.
[0008] Preferably, a reserved amount is arranged between the end m
of the linkage locking pawl and the convex teeth, and the range of
the reserved amount is the maximum dead point passing position to
the maximum dead point departing position of the door opening
arm.
[0009] Preferably, the range of the reserved amount is the maximum
dead point passing position to the minimum dead point passing
position of the door opening arm.
[0010] The present invention further provides a hopper car bottom
door, including the connecting rod type two-level locking device
provided by the present invention.
[0011] The present invention further provides a hopper car,
including the hopper car bottom door provided by the present
invention.
[0012] According to the connecting rod type two-level locking
device provided by the present invention, the standstill locking
disk and the linkage mechanism are additionally arranged on the
basis of the hopper car bottom door, which is opened and closed by
the planar four-bar linkage passing the dead point, in general,
since the end m of the linkage locking pawl abuts against the
convex teeth of the standstill locking disk due to the self-gravity
of the first roller and the unlocking lever, the connecting rod
type two-level locking device is the truss, even if the first
roller is accidently applied with an upward acting force, as long
as the first locating pin does not arrive at the upper semicircle
of the slotted hole formed on the mater arm and is continuously
stressed, the linkage mechanism cannot rotate, and at this time,
the slave arm cannot rotate neither.
[0013] The hopper car bottom door provided by the present invention
includes the connecting rod type two-level locking device provided
by the present invention, even if the first roller is accidently
applied with an upward acting force, as long as the first locating
pin does not arrive at the upper semicircle of the slotted hole
formed on the mater arm, the linkage mechanism cannot rotate, at
this time, the slave arm cannot rotate neither, so that the
accidental opening of the hopper car bottom door is avoided.
[0014] The hopper car provided by the present invention has the
hopper car bottom door provided by the present invention, and the
accidental opening of the hopper car bottom door can be avoided, so
that the application is more reliable.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a schematic diagram of a structure of a connecting
rod type two-level locking device (with linkage mechanism removed)
provided by an embodiment of the present invention;
[0016] FIG. 2 is a schematic diagram of a structure of a connecting
rod type two-level locking device provided by an embodiment of the
present invention, when the end m of a linkage locking pawl abuts
against the convex teeth of a standstill locking disk;
[0017] FIG. 3 is a schematic diagram of a structure of a connecting
rod type two-level locking device provided by an embodiment of the
present invention, when the end m of a linkage locking pawl just
deviates from the convex teeth of a standstill locking disk;
[0018] FIG. 4 is a schematic diagram of a structure of a connecting
rod type two-level locking device provided by an embodiment of the
present invention, when a slave arm moves to the limit;
[0019] FIG. 5 is a schematic diagram of a structure of a reserved
amount between the end m of a linkage locking pawl and convex teeth
of a connecting rod type two-level locking device provided by an
embodiment of the present invention;
[0020] FIG. 6 is a schematic diagram of a structure of a torsion
spring and a connection of the torsion spring with a slave arm and
a linkage locking pawl of a connecting rod type two-level locking
device provided by an embodiment of the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] To better understand the present invention, a detailed
illustration of the present invention will be given below in
combination with accompanying drawings and specific
embodiments.
[0022] See FIG. 1 to FIG. 4, a connecting rod type two-level
locking device provided by the present invention includes a
transmission shaft 1, a door opening arm, a first roller 8, a
second roller 10, a first locating pin 7, a standstill locking disk
24 and a linkage mechanism, wherein the door opening arm includes a
master arm 2 and a slave arm 3, a slotted hole 6 is formed on one
end 4 of the master arm 2, the other end of the master arm is
fixedly connected to the transmission shaft 1, the first locating
pin 7 is fixedly connected to the first roller 8, the first roller
8 forms a sliding pair with the slotted hole 6 through the first
locating pin 7, the second roller 10 is hinged with one end 5 of
the slave arm 3, the reference number of the hinge point is 9, and
the other end of the slave arm is fixedly connected to the
transmission shaft 1.
[0023] The standstill locking disk 24 is fixedly connected to the
transmission shaft 1, and convex teeth 25 are arranged at the
bottom end of the standstill locking disk 24.
[0024] The linkage mechanism includes an unlocking lever 11, an
unlocking connecting rod 15 and a linkage locking pawl 20, the
unlocking lever 11 is provided with an end a 12 and an end b 13,
the unlocking connecting rod 15 is provided with an end c 16 and an
end d 17, the linkage locking pawl 20 is provided with an end m 21
and an end n 22, the end b 13 of the unlocking lever 11 is hinged
with the end c 16 of the unlocking connecting rod 15, the reference
number of the hinge point is 18, the end d 17 of the unlocking
connecting rod 15 is hinged with the end m 21 of the linkage
locking pawl 20, and the reference number of the hinge point is
19.
[0025] The middle position of the unlocking lever 11 is hinged with
the master arm 2, the reference number of the hinge point is 14,
the end a 12 of the unlocking lever 11 is lapped on the first
roller 8, and the end n of the linkage locking pawl 20 is hinged
with the slave arm 3.
[0026] See FIG. 2, in general, the first locating pin 7 is located
at the lower semicircle of the slotted hole 6, at this time, the
end m 21 of the linkage locking pawl 20 abuts against the convex
teeth 25, and the connecting rod type two-level locking device is a
truss.
[0027] See FIG. 3, when the first roller 8 is applied with an
upward acting force, the first roller 8 is driven by the first
locating pin 7 to slide upwards in the slotted hole 6, when the
first locating pin 7 is located at the upper semicircle of the
slotted hole 6, the end m 21 of the linkage locking pawl 20
deviates from the convex teeth 25, at this time, a force is
continuously applied to the first roller 8, and the slave arm 3
moves together with the master arm 2 and the linkage mechanism,
until moving to the position as shown in FIG. 4.
[0028] According to the connecting rod type two-level locking
device provided by the present invention, the standstill locking
disk 24 and the linkage mechanism are additionally arranged on the
basis of the hopper car bottom door, which is opened and closed by
the planar four-bar linkage passing the dead point, in general,
since the end m 21 of the linkage locking pawl 20 abuts against the
convex teeth 25 of the standstill locking disk 24 due to the
self-gravity of the first roller 8 and the unlocking lever 11, the
connecting rod type two-level locking device is the truss, even if
the first roller 8 is accidently applied with an upward acting
force, as long as the first locating pin 7 does not arrive at the
upper semicircle of the slotted hole 6 formed on the mater arm 2
and is continuously stressed, the linkage mechanism cannot rotate,
and at this time, the slave arm 3 cannot rotate neither.
[0029] Wherein, the transmission shaft 1 is provided with an
eccentricity passing distance, the larger the eccentricity passing
distance is, the larger the pressing force of the end m of the
linkage locking pawl 20 and the convex teeth 25 of the standstill
locking disk 24 is, the larger the acting force needing to be
applied to the first roller 1 is, and the better the reliability of
the connecting rod type two-level locking device provided by the
present invention can be guaranteed.
[0030] Wherein, see FIG. 6, the connecting rod type two-level
locking device can further include a torsion spring 29, the torsion
spring 29 is sleeved on the hinge point 23 of the end n 22 of the
linkage locking pawl 20 and the slave arm 3 in an intercrossing
manner, one end 30 of the torsion spring 29 is fixedly connected to
the slave arm 3, the other end 31 of the torsion spring is fixedly
connected to the linkage locking pawl 20, the torsion spring 29 can
provide a standstill locking force to the linkage mechanism, and
the standstill locking force is used for preventing the linkage
mechanism from rotating together with the self-gravity of the first
roller 8 and the unlocking lever 11, so that the connecting rod
type two-level locking device provided by the present invention is
more reliable.
[0031] Wherein, see FIG. 5, a reserved amount is arranged between
the end m of the linkage locking pawl 20 and the convex teeth 25,
the range of the reserved amount is the maximum dead point passing
position 26 to the maximum dead point departing position 28 of the
door opening arm, at this time, the connecting rod type two-level
locking device can not only be locked in two levels, but also can
be applied to new manufacture and overhaul, the reliability and
adaptability of the connecting rod type two-level locking device
are improved, and the connecting rod type two-level locking device
is convenient to overhaul and maintain.
[0032] Wherein, considering that the position passing the dead
point of the used transmission shaft 1 in an opening and closing
process is decreased as compared with that in new manufacture, a
reserved amount away from the dead point of the transmission shaft
is considered in the locking position of the linkage locking pawl
20, and the range of the reserved amount is the maximum dead point
passing position 26 to the minimum dead point passing position 27
of the door opening arm.
[0033] The present invention further provides a hopper car bottom
door, including the connecting rod type two-level locking device
provided by the present invention.
[0034] The present invention further provides a hopper car,
including the hopper car bottom door provided by the present
invention.
[0035] The hopper car bottom door provided by the present invention
includes the connecting rod type two-level locking device provided
by the present invention, even if the first roller is accidently
applied with an upward acting force, as long as the first locating
pin does not arrive at the upper semicircle of the slotted hole
formed on the mater arm, the linkage mechanism cannot rotate, at
this time, the slave arm cannot rotate neither, so that the
accidental opening of the hopper car bottom door is avoided.
[0036] The hopper car provided by the present invention has the
hopper car bottom door provided by the present invention, and the
accidental opening of the hopper car bottom door can be avoided, so
that the application is more reliable.
[0037] The foregoing specific implementations are further detailed
descriptions of the purposes, technical solutions and beneficial
effects of the present invention, and it should be understood that,
the foregoing descriptions are merely specific implementations of
the present invention, rather than limiting the present invention.
Any modifications, equivalent substitutions and improvements or the
like made within the spirit and principle of the present invention
shall fall within the protection scope of the present
invention.
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