U.S. patent application number 14/806948 was filed with the patent office on 2016-12-22 for braking device for motor of actuator.
The applicant listed for this patent is TIMOTION TECHNOLOGY CO., LTD.. Invention is credited to Vladimir Jurka, Chou-Hsin WU.
Application Number | 20160369859 14/806948 |
Document ID | / |
Family ID | 57586934 |
Filed Date | 2016-12-22 |
United States Patent
Application |
20160369859 |
Kind Code |
A1 |
WU; Chou-Hsin ; et
al. |
December 22, 2016 |
BRAKING DEVICE FOR MOTOR OF ACTUATOR
Abstract
A roaster (1) and heating cover (20) thereof are disclosed. The
roaster (1) includes a pot (10) and a heating cover (20) covered
correspondingly thereon. An inner space of a cover body is
separated into an installing chamber (2110) and a hot air chamber
(2111). A motor (22) and an actuator (24) are fixed in the
installing chamber (2110). The hot air supply module (23) is
disposed in the hot air chamber (2111), and a group of the
reduction gears (25) is driven by the actuator (24). A stirring
component (26) connecting the group of the reduction gears (25) is
disposed in the hot air chamber (2111). Thus an inner space of the
roaster (1) will be maintained for flipping the ingredients.
Inventors: |
WU; Chou-Hsin; (New Taipei
City, TW) ; Jurka; Vladimir; (New Taipei City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
TIMOTION TECHNOLOGY CO., LTD. |
New Taipei City |
|
TW |
|
|
Family ID: |
57586934 |
Appl. No.: |
14/806948 |
Filed: |
July 23, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F16D 2125/582 20130101;
F16D 2127/004 20130101; F16D 49/04 20130101; F16D 65/22 20130101;
F16D 2121/14 20130101 |
International
Class: |
F16D 65/22 20060101
F16D065/22 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 22, 2015 |
TW |
104120025 |
Claims
1. A braking device used for a motor of an actuator, the motor of
the actuator comprising a shaft, wherein the braking device
comprises: a base, including an axial connected section and a
placed section formed at a lateral side of the axial connected
section; an elastic unit, disposed at the placed section; a braking
mechanism, assembled at the axial connected section, the braking
mechanism comprises a braking ring sleeved on the shaft and a coil
spring tightened to an outer peripheral edge of the braking ring, a
first torque arm and a second torque arm extend from two ends of
the coil spring, and the first torque arm abuts one end of the
elastic unit; and a stopper, corresponding to a rotational path of
the second torque arm and is disposed at the base.
2. The braking device used for a motor of an actuator according to
claim 1, wherein when an rotational direction of the shaft is
identical to the rotational direction of the coil spring, the coil
spring tightens the braking ring so as to brake the shaft, and
wherein a maximum braking force is achieved when the second torque
arm is rotated to a position of the stopper.
3. The braking device used for a motor of an actuator according to
claim 2, wherein the base comprises a bottom plate, and the axial
connected section is a hole set up at the bottom plate and a curve
wall extending from a peripheral edge of the hole.
4. The braking device used for a motor of an actuator according to
claim 3, wherein the base further comprises a hoarding extending
upward from a peripheral edge of the bottom plate, and the placed
section is a semi-cylindrical barrel formed between the bottom
plate and the hoarding.
5. The braking device used for a motor of an actuator according to
claim 4, wherein the elastic unit comprises a gliding unit and a
compressive spring, the gliding unit comprises a cylinder and a
protrusion extending from the cylinder, the cylinder is movably
disposed inside the semi-cylindrical barrel, and the compressive
spring is disposed inside the semi-cylindrical barrel and is
elastically clamped between the hoarding and the cylinder.
6. The braking device used for a motor of an actuator according to
claim 4, wherein a vertical column extends from the bottom plate
and is disposed at a front end of the semi-cylindrical barrel and
corresponds to the curve wall.
7. The braking device used for a motor of an actuator according to
claim 6, wherein a fixed column is disposed at one side of the
semi-cylindrical barrel and the vertical column.
8. The braking device used for a motor of an actuator according to
claim 2, wherein the elastic unit is a compressive elastic
unit.
9. The braking device used for a motor of an actuator according to
claim 2, wherein the braking ring comprises a plurality of curve
plates, an inner wall of each of the plurality of curve plates has
an oil storage tank disposing therein, and the oil storage tank
corresponds to an axial direction of the plurality of curve
plates.
10. The braking device used for a motor of an actuator according to
claim 9, wherein each of an outer wall of the plurality of curve
plates has a plurality of grooves, and each of the plurality of
grooves is disposed corresponding to a radial direction of the
plurality of curve plates.
11. The braking device used for a motor of an actuator according to
claim 9, wherein a stop lever folds inwardly from a free end of the
second torque arm, and the stop lever passes into the intervals
between any two adjacent curve plates.
12. The braking device used for a motor of an actuator according to
claim 2, wherein an angle is formed between the first torque arm
and the second torque arm, and the angle is between 10.degree. and
50.degree..
13. The braking device used for a motor of an actuator according to
claim 12, wherein the angle is between 20.degree. and
40.degree..
14. The braking device used for a motor of an actuator according to
claim 13, wherein the angle is 30.degree..
15. The braking device used for a motor of an actuator according to
claim 2, wherein the braking ring is a cylindrical barrel having a
sectional groove, and the sectional groove is parallel to an axis
of the cylindrical barrel.
16. The braking device used for a motor of an actuator according to
claim 2, further comprising an adjusting lever, the base having a
screw hole, and the adjusting lever screwing to the screw hole and
connecting with the stopper.
17. The braking device used for a motor of an actuator according to
claim 2, wherein the stopper is a fixed stopper.
Description
TECHNICAL FIELD
[0001] The disclosure relates to a braking device, more
particularly to a braking device for a motor of an actuator.
BACKGROUND
[0002] Linear actuators mainly use electric motors and actuating
elements, such as worm gears and worm wheels, to actuate leadscrews
rotating. Meanwhile, the leadscrews actuate telescopic tubes
screwed thereof extending out or retracting. Since the structure
and the assembly are simpler and more convenient than pneumatic
cylinders or hydraulic cylinders, the linear actuators are widely
used in apparatuses, such as sickbeds, electric chairs and other
fields that need expansion and retraction.
[0003] Conventional linear actuators are disclosed in EP0662573B
and WO2004-027290A2, wherein EP0662573B discloses that an actuator
mainly comprises a worm gear, a leadscrew, and a worm wheel
assembly fixed at one end of the leadscrew. The worm wheel assembly
comprises a worm wheel, a coil spring surrounding the outer
peripheral edge of a cylindrical annular body. WO2004-027290A2
seeks to solve the problem in the previous application that a great
amount of heat is generated by the friction between the coil spring
and the annular body during the movement, and it applies a heat
conducting unit to dissipate heat.
[0004] However, the coil spring in conventional linear actuator is
fixed, and the cylindrical annular body rotates with the worm
wheel, so that heat is generated by the friction between the coil
spring and the cylindrical annular body. In addition, the
cylindrical annular body is generally made of plastics, so that the
heat would cause the cylindrical annular body melting or the coil
spring being worn out rapidly. Thus, the lifespan is greatly
decreased. Also, the braking effect is achieved merely by linear
contact between the coil spring and the cylindrical annular body,
which is rotating, for decelerating or braking Since the effective
contact areas between the coil spring and the annular body is
small, the ability of decelerating or braking is limited.
SUMMARY
[0005] One purpose of the disclosure is to provide a braking device
for a motor of an actuator. The braking device retracts the coil
spring by the elastic force of the elastic unit, so that the
braking ring can have a stable braking effect.
[0006] To reach this goal, the disclosure provides a braking device
for a motor of an actuator. The motor of an actuator comprises a
shaft. The braking device comprises a base, an elastic unit, a
braking mechanism and a stopper. The base includes an axial
connected section and a placed section formed at a lateral side of
the axial connected section; the elastic unit is disposed at the
placed section; the braking mechanism is assembled at the axial
connected section, the braking mechanism comprises a braking ring
sleeved on the shaft and a coil spring tightened to the outer
peripheral edge of the braking ring, a first torque arm and a
second torque arm extend from the two ends of the coil spring, and
the first torque arm abuts one end of the elastic unit; the topper
corresponds to the rotational path of the second torque arm and is
disposed at the base.
[0007] Moreover, the disclosure may also achieve the following
effects. The disclosure assembles the elastic unit, the braking
mechanism and the stopper inside the body in advance, so that the
assembly process and assembly time of the braking device and the
motor of the actuator can be greatly reduced. The braking device
can be used in motors of actuators with different braking forces by
the use of the adjusting lever. When the braking device of the
disclosure is used for the linear actuator, the linear actuator can
decline in a steady velocity, so that the user can have comfortable
experience. The braking device of the disclosure further has
advantages of a simple structure, low costs and a small size.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The disclosure will become more fully understood from the
detailed description and the drawings given herein below for
illustration only, and thus does not limit the disclosure,
wherein:
[0009] FIG. 1 is an exploded perspective view of a braking device
according to the disclosure;
[0010] FIG. 2 is a combinational view of the braking device
according to the disclosure;
[0011] FIG. 3 is an exploded view of the braking device used for a
motor of an actuator of the disclosure;
[0012] FIG. 4 is a combinational view of the braking device used
for a motor of an actuator of the disclosure;
[0013] FIG. 5 is a combinational sectional view of the braking
device used for a motor of an actuator of the disclosure;
[0014] FIG. 6 is a schematic view of a first using status of the
braking device used for a motor of an actuator of the
disclosure;
[0015] FIG. 7 is a schematic view of a second using status of the
braking device used for a motor of an actuator of the
disclosure;
[0016] FIG. 8 is a combinational view of the braking device
according to another embodiment of the disclosure; and
[0017] FIG. 9 is an external view of the braking ring of the
braking device according to another embodiment of the
disclosure.
DETAILED DESCRIPTION
[0018] In the following detailed description, for purposes of
explanation, numerous specific details are set forth in order to
provide a thorough understanding of the disclosed embodiments. It
will be apparent, however, that one or more embodiments may be
practiced without these specific details. In other instances,
well-known structures and devices are schematically shown in order
to simplify the drawing.
[0019] Referring to FIGS. 1 and 2, the disclosure provides a
braking device used for a motor of an actuator. The braking device
1 mainly comprises a base 10, an elastic unit 20, a braking
mechanism 30 and a stopper 40.
[0020] The base 10 can be made of plastics, and it mainly comprises
a circular sector shaped bottom plate 11 and a hoarding 12
extending upward from the peripheral edge of the bottom plate 11.
The middle section of the bottom plate 11 has an axial connected
section 13. The axial connected section 13 is a hole 131 set up at
the bottom plate 11 and a curve wall 132 extending from the
peripheral edge of the hole 131. Also, a placed section 14 is
formed at a lateral side of the axial connected section 13, and the
placed section 14 is a semi-cylindrical barrel 141 formed between
the bottom plate 11 and the hoarding 12. Further, a vertical column
15 extends from the bottom plate 11 and the vertical column 15 is
disposed at the front end of the semi-cylindrical barrel 141 and
corresponds to a notch of a curve wall 132. In addition, a fixed
column 16 is disposed at the side of the semi-cylindrical barrel
141 and the vertical column 15, such that screwed units, such as
bolts, can pass through and fix with it.
[0021] In this embodiment, the elastic unit 20 is a compressive
elastic unit, and it mainly comprises a gliding unit 21 and a
compressive spring 22. The gliding unit 21 comprises a cylinder 211
and a protrusion 212 extending from the cylinder 211. The cylinder
211 is movably disposed inside the semi-cylindrical barrel 141. The
compressive spring 22 is disposed inside the semi-cylindrical
barrel 141 and is elastically clamped between the hoarding 12 and
the cylinder 211.
[0022] The braking mechanism 30 is assembled at the axial connected
section 13 of the base 10, and it mainly comprises a braking ring
31 and a coil spring 32 tightened to the outer peripheral edge of
the braking ring 31. The braking ring 31 can be made of metals or
plastics. In this embodiment, the braking ring 31 comprises three
curve plates 311. The inner wall of each of the curve plates 311
has an oil storage tank 312 disposing therein, and each of the oil
storage tanks 312 corresponds to the axial direction of the curve
plates 311. Also, each of the outer walls of the curve plates 311
has a plurality of grooves 313, and each of the plurality of
grooves 313 is disposed corresponding to the radial direction of
the plurality of curve plates 311. Thus, the coil spring 32 can be
fixed with each of the curve plates 311 stably.
[0023] A first torque arm 321 and a second torque arm 322 extend
from the two ends of the coil spring 32. The first torque arm 321
is disposed between the protrusion 212 of the gliding unit 21 and
the vertical column 15, and the first torque arm 321 is abutted by
the protrusion 212. Under the free status, the angle A between the
first torque arm 321 and the second torque arm 322 is between
10.degree. and 50.degree.. Preferably, the angle A is between
20.degree. and 40.degree.. Most preferably, the angle A is
30.degree.. When the angle A is greater than 50.degree. or when the
angle A is smaller than 10.degree., the breaking force is too large
or too small so that it cannot be applied.
[0024] Moreover, a stop lever 323 folds inwardly from the free end
of the second torque arm 322. The stop lever 323 passes into the
intervals formed between any two adjacent curve plates 311, so as
to prevent the curve plates 311 swinging excessively.
[0025] In this embodiment, the stopper 40 is a fixed stopper 40,
and it corresponds to the rotational path of the second torque arm
322 and is fixed to the bottom plate 11 of the base 10.
[0026] Referring to FIGS. 3-5, the braking device 1 of the
disclosure can be used for a motor 7 of an actuator. The motor 7 of
the actuator comprises a shaft 71 and has a screw hole 72. For
assembling, the braking ring 31 of the braking mechanism 30 is
sleeved corresponding to the shaft 71, the end surface of the
hoarding 12 attaches the back end surface of the motor 7 of the
actuator, and a bolt passes through the fixed column 16 so as to be
fixed to the screw hole 72. Thus, the assembling process of the
braking device 1 and the motor 7 of the actuator of the disclosure
can be easily accomplished.
[0027] As shown in FIGS. 6 and 7, when being used, the rotational
direction of the shaft 71 is identical to the rotational direction
of the coil spring 32, wherein "identical" indicates that when the
coil spring 32 is a right-handed coil spring and the shaft 71
rotates counterclockwise, the first torque arm 321 of the coil
spring 32 is elastically abutted by the elastic unit 20, so that
the coil spring 32 retracts radially and tightens the braking ring
31, and the braking action is generated by the friction between the
inner surface of the braking ring 31 and the circumferential
surface of the shaft 71. When the coil spring 32 retracts radially,
the second torque arm 322 swings with the rotation of the braking
ring 31. When the second torque arm 322 rotates to the position of
the stopper 40, it has a maximum braking force so that the shaft 71
stops rotating. Thus, when the motor 7 of the actuator is used in a
linear actuator (not shown in the figure) and the linear actuator
is assembled in an electric bed or an electric chair, the downward
movement of the deck or the seat back would become more slowly, so
that the user can have more comfortable using experience.
[0028] In contrast, when the shaft 71 rotates clockwise, the first
torque arm 321 of the coil spring 32 attaches the vertical column
15, so that the coil spring 32 expands radially. At this moment,
the braking ring 31 is released, so that the friction to the
rotation of the shaft 71 is decreased, and the shaft 71 can easily
rotate inside the braking ring 31. Thereby, it can transmit without
affecting the performance of transmission of the motor 7 of the
actuator.
[0029] Referring to FIG. 8, the braking device 1a further comprises
an adjusting lever 50, the hoarding 12 of the base 10 has a screw
hole 121. The adjusting lever 50 screws to the screw hole 121 and
then is connected with the stopper 40, so that the stopper 40 can
move forwardly or backwardly by screwing-in or screwing-out the
adjusting lever 50. Thus, it can be used in motors 7 of the
actuator with different braking forces.
[0030] As shown in FIG. 9, besides the embodiments described above,
the braking ring 31' of the disclosure mainly has a sectional
groove 33 at a cylindrical barrel, and the sectional groove 33 is
parallel to the axis of the braking ring 31'.
[0031] According to the above descriptions, the braking device used
for a motor of the actuator of the disclosure can achieve the
purposes and solve the problems met in conventional technologies.
Thus, the disclosure involves novelty and inventiveness as well as
meets the requirements of patent application. Thus, the application
is applied according to Patent Law. The application is kindly
requested to be granted for ensuring the right of the
inventors.
* * * * *