U.S. patent application number 14/043153 was filed with the patent office on 2015-04-02 for flow-bypassing structure of grinding tool and grinding tool having the same.
This patent application is currently assigned to HYPHONE MACHINE INDUSTRY CO., LTD.. The applicant listed for this patent is HYPHONE MACHINE INDUSTRY CO., LTD.. Invention is credited to Po-Jen LAI, Tien LIN, Chih-Ming TING.
Application Number | 20150093974 14/043153 |
Document ID | / |
Family ID | 52740618 |
Filed Date | 2015-04-02 |
United States Patent
Application |
20150093974 |
Kind Code |
A1 |
TING; Chih-Ming ; et
al. |
April 2, 2015 |
FLOW-BYPASSING STRUCTURE OF GRINDING TOOL AND GRINDING TOOL HAVING
THE SAME
Abstract
The present invention relates to a flow-bypassing structure and
a grinding tool having the same. The main body has an intake
passage and an exhaust passage. A cylinder is disposed in an
interior of the main body and has an air inlet communicated with
the intake passage and an air outlet communicated with the exhaust
passage to form an airflow pathway. A rotor is disposed in the
cylinder, and a rotational axle base is rotatably disposed though
the cylinder and in a rotational cooperative relationship with the
rotor. An end of the rotational axle base is extended and formed
with a rotational working portion outside the cylinder. The
surroundings of the rotational working portion define a space. A
flow-bypassing passage is communicated with the airflow pathway and
the space, and an end of the flow-bypassing passage is open toward
the space.
Inventors: |
TING; Chih-Ming; (Taichung
City, TW) ; LIN; Tien; (Taichung City, TW) ;
LAI; Po-Jen; (Taichung City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HYPHONE MACHINE INDUSTRY CO., LTD. |
Taichung City |
|
TW |
|
|
Assignee: |
HYPHONE MACHINE INDUSTRY CO.,
LTD.
Taichung City
TW
|
Family ID: |
52740618 |
Appl. No.: |
14/043153 |
Filed: |
October 1, 2013 |
Current U.S.
Class: |
451/488 |
Current CPC
Class: |
B24B 55/02 20130101 |
Class at
Publication: |
451/488 |
International
Class: |
B24B 55/02 20060101
B24B055/02 |
Claims
1. A flow-bypassing structure of a grinding tool adapted for being
assembled to a main body of the grinding tool, the main body having
an intake passage and an exhaust passage, a cylinder disposed in an
interior of the main body and having an air inlet and an air
outlet, the air inlet communicated with the intake passage, the air
outlet communicated with the exhaust passage, an airflow pathway
defined to be communicated with the interior of the cylinder, the
air outlet and the exhaust passage, a rotor being disposed in the
cylinder, a rotational axle base rotatably disposed though the
cylinder and in a rotational cooperative relationship with the
rotor, an end of the rotational axle base extended and formed with
a rotational working portion which is operable from an outside of
the cylinder, the surroundings of the rotational working portion
defining a space, an abutting ring neighboring the space abutted
against the main body and the cylinder so as to fixedly position
the cylinder in the main body, a flow-bypassing passage disposed
through a side wall of the cylinder and communicated with the
airflow pathway, an end of the flow-bypassing passage being open
toward the abutting ring and a venting pathway disposed through the
abutting ring and communicated with the space and the
flow-bypassing passage.
2. The flow-bypassing structure of the grinding tool of claim 1,
wherein the cylinder includes a tubular member and a lid member, an
end of the tubular member remote from the space has a first axle
hole, the other end of the tubular member is an open end, the lid
member is disposed on the open end of the tubular member and has a
second axle hole corresponding to the first axle hole, and the
rotational axle base is rotatably disposed in the first and second
axle holes.
3. The flow-bypassing structure of the grinding tool of claim 1,
wherein the cylinder includes a tubular member and a lid member, an
end of the tubular member near the space is an open end, the other
end of the tubular member has a first axle hole, the lid member is
disposed on the open end of the tubular member and has a second
axle hole corresponding to the first axle hole, and the rotational
axle base is rotatably disposed in the first and second axle
holes.
4. The flow-bypassing structure of the grinding tool of claim 1,
wherein the cylinder includes a tubular member and two lid members,
the two corresponding ends of the tubular member are open ends, the
two lid members are respectively disposed on the two corresponding
ends of the tubular member and has corresponding first and second
holes, and the rotational axle base is rotatably disposed in the
first and second axle holes.
5. The flow-bypassing structure of the grinding tool of claim 2,
wherein the flow-bypassing passage is disposed at the end of the
tubular member near the space and substantially along an axis of
the rotational axle base.
6. The flow-bypassing structure of the grinding tool of claim 3,
wherein the flow-bypassing passage is disposed on the lid member
and substantially along an axis of the rotational axle base.
7. The flow-bypassing structure of the grinding tool of claim 4,
wherein the flow-bypassing passage is disposed on the lid member
near the space and substantially along an axis of the rotational
axle base.
8. The flow-bypassing structure of the grinding tool of claim 1,
wherein the flow-bypassing passage is communicated with the
interior of the cylinder and the venting pathway.
9. The flow-bypassing structure of the grinding tool of claim 1,
wherein the flow-bypassing passage is communicated with the exhaust
passage on the exterior of the cylinder and the venting
pathway.
10. The flow-bypassing structure of the grinding tool of claim 1,
wherein part of the main body surrounds the rotational working
portion, and the space is formed among the part of the main body,
the cylinder and the rotational working portion.
11. The flow-bypassing structure of the grinding tool of claim 1,
wherein the abutting ring and the cylinder define the venting
pathway.
12. The flow-bypassing structure of the grinding tool of claim 1,
wherein a side of the abutting ring facing the cylinder is formed
with an outer ring protrusion and an inner ring recession which is
relatively remote from the cylinder, and the end of the
flow-bypassing passage is open toward the inner ring recession.
13. The flow-bypassing structure of the grinding tool of claim 12,
wherein a sealing ring member is further surroundingly disposed
between the outer ring protrusion and the inner ring recession, and
the sealing ring member is air-tightly abutted against the cylinder
and the inner ring recession.
14. A grinding tool, including the flow-bypassing structure of
claim 1.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a grinding tool, more
particularly, to a flow-bypassing structure of a grinding tool and
the grinding tool which includes the flow-bypassing structure.
[0003] 2. Description of the Prior Art
[0004] As disclosed in the prior arts of grinding tools such as
TW440488, TWM261316, TWM288839, TWI260255 and TWM349818, the
conventional grinding tools have a cylinder disposed in a main
body. The cylinder has a rotor which is in a rotational cooperative
relationship with a rotational axle, and a grinding sheet is
disposed at an end of the rotational axle. When a high pressure gas
enters the cylinder and drives the rotor to rotate, the rotational
axle and the grinding sheet will be driven to grind an object.
[0005] During the grinding operation, the grinding tools rotate in
an extremely high speed; therefore, the rotational axle and an axle
bearing will generate a large amount of heat, and their temperature
will rise continuously due to high-speed rotation. However, the
conventional grinding tools are not equipped with cooling
apparatuses or systems to lower the temperature, so each member has
higher temperature, and members like the rotational axle and the
axle bearing are prone to problems such as mechanical fatigue,
damage, breakdown or the like. Besides, during the process of
grinding an object, the grinded part of the surface of the object
will become a large amount of tiny particles. The particles are
prone to remain on the surface of each member and get stuck in the
tiny gaps among the members (for example, the gap between the
rotational axle and the axle bearing); hence, the grinding tools
are prone to have problems like unsmooth rotation or apparatus
abrasion, and the temperature during the operation will rise more
easily.
[0006] The present invention is, therefore, arisen to obviate or at
least mitigate the above-mentioned disadvantages.
SUMMARY OF THE INVENTION
[0007] The object of the present invention is to provide a
flow-bypassing structure of a grinding tool and the grinding tool
which includes the flow-bypassing structure which can quickly and
effectively reduce the heat caused by high-speed rotation of a
rotational axle base and an axle bearing and prevent the
temperature from rising. In addition, the present invention can
effectively blow away particles produced when grinding an object so
as to prevent problems like dirt accumulation, unsmooth rotation
and even machine abrasion.
[0008] To achieve the above and other objects, the flow-bypassing
structure of a grinding tool of the present invention is adapted
for being assembled in a main body of a grinding tool. The main
body has an intake passage and an exhaust passage. A cylinder is
disposed in the interior of the main body and has an air inlet and
an air outlet. The air inlet is communicated with the intake
passage, and the air outlet is communicated with the exhaust
passage. An airflow pathway is defined to be communicated with the
interior of the cylinder, the air outlet and the exhaust passage. A
rotor is disposed in the cylinder. A rotational axle base is
rotatably disposed through the cylinder and in a rotational
cooperative relationship with the rotor. An end of the rotational
axle base is extended and formed with a rotational working portion
which is operable from an outside of the cylinder. The surroundings
of the rotational working portion define a space. A flow-bypassing
passage is communicated with the airflow pathway and the space, and
an end of the flow-bypassing passage is open toward the space.
[0009] To achieve the above and other objects, the present
invention further provides a grinding tool which includes the
above-mentioned flow-bypassing structure.
[0010] The present invention will become more obvious from the
following description when taken in connection with the
accompanying drawings, which show, for purpose of illustrations
only, the preferred embodiment(s) in accordance with the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a perspective view of a first embodiment of the
present invention;
[0012] FIG. 2 is a cross-sectional view of the first embodiment of
the present invention;
[0013] FIG. 3 is a partial perspective view of the first embodiment
of the present invention;
[0014] FIG. 4 is a partial breakdown drawing of the first
embodiment of the present invention;
[0015] FIG. 5 is a drawing showing a second embodiment of the
present invention;
[0016] FIG. 6 is a drawing showing a third embodiment of the
present invention;
[0017] FIG. 7 is a drawing showing a fourth embodiment of the
present invention;
[0018] FIG. 8 is a drawing showing a fifth embodiment of the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0019] Please refer to FIGS. 1 to 4 for a first embodiment of the
present invention. A flow-bypassing structure of a grinding tool of
the present invention is adapted for being assembled in a main body
1 of a grinding tool. The main body 1 has an intake passage 11 and
an exhaust passage 12. The intake passage 11 is provided for being
communicated with a high pressure gas source and making the high
pressure gas enter the main body 1. The exhaust passage 12 is
provided for venting the used high pressure gas.
[0020] A cylinder 2 is disposed in the interior of the main body 1
and has an air inlet 21 and an air outlet 22. The air inlet 21 is
communicated with the intake passage 11, and the air outlet 22 is
communicated with the exhaust passage 12. An airflow pathway 23 is
defined to be communicated with the interior of the cylinder 2, the
air outlet 22 and the exhaust passage 12. A rotor 24 is disposed in
the cylinder 2. The high pressure gas goes through the intake
passage 11 and enters the interior of the cylinder 2 from the air
inlet 21 to drive the rotor 24, and then the high pressure gas will
be vented out through the air outlet 22 and the exhaust passage 12.
In this embodiment, the cylinder 2 includes a tubular member 25 and
two lid members 26. Two corresponding ends of the tubular member 25
are open ends. The two lid members 26 are respectively disposed on
the two corresponding ends of the tubular member 25 and have
correspondingly a first axle hole 261 and a second axle hole 262.
More specifically, a wall of the tubular hole 25 and the two lid
members 26 are correspondingly formed with through holes and
detachably mounted in the through holes via an elastic latch 27 so
as to be mutually connected.
[0021] A rotational axle base 3 is rotatably disposed through the
cylinder 2 and in a rotational cooperative relationship with the
rotor 24. More specifically, the rotational axle base 3 is
rotatably disposed in the first axle hole 261 and the second axle
hole 262 through at least one axle bearing 31. An end of the
rotational axle base 3 is extended out of the first axle hole 261
and connected with the cylinder 2 through a connecting member such
as a c-ring 32. An end of the rotational axle base 3 is extended
and formed with a rotational working portion 33 which is operable
from an outside of the cylinder 2. The surroundings of the
rotational working portion 33 define a space 34. A grinding sheet 4
is detachably mounted on the rotational working portion 33, so the
grinding sheet 4 can rotate with the rotational working portion 33
to carry out grinding operation.
[0022] In this embodiment, a lower part of the main body 1
surrounds the rotational working portion 33, and the space 34 is
formed among the lower part of the main body 1, the cylinder 2 and
the rotational working portion 33. From another viewpoint, the
space 34 is located correspondingly under the cylinder 2 (under a
bottom lid of the cylinder 2). Preferably, a side of the cylinder 2
facing the space 34 is formed with an abutting ring 28 (such as a
binding ring). The abutting ring 28 is surroundingly disposed in
the rotational axle base 3, and the abutting ring 28 is abutted
against the main body 1 and the cylinder 2 so as to fixedly
position the cylinder 2 in the main body 1. Preferably, an outer
peripheral face of the abutting ring 28 is formed with threads (but
not limited thereto) and can be screwed to an inner face of the
main body 1 so as to make the cylinder 2 detachably fixed to the
main body 1.
[0023] A flow-bypassing passage 5 is communicated with the airflow
pathway 23 and the space 34, and an end of the flow-bypassing
passage 5 is open toward the space 34. More specifically, the
flow-bypassing passage 5 is disposed through a side wall of the
cylinder 2. The flow-bypassing passage 5 is disposed on the lid
member 26 near the space 34 and substantially along an axis of the
rotational axle base 3; that is, an opening of the flow-bypassing
passage 5 is preferably substantially toward the rotational working
portion 33, wherein the flow-bypassing passage 5 goes through a gap
between the abutting ring 28 and the rotational axle base 3.
Understandably, the flow-bypassing passage 5 is communicated with
the interior of the cylinder 2 and the space 34, or the
flow-bypassing passage 5 can also be communicated with the exhaust
passage 12 (extended from the interior of the main body 1 and
communicated with a space outside the grinding tool) in the
exterior of the cylinder 2 and the space 34.
[0024] In a second embodiment of the present invention shown in
FIG. 5, a cylinder 2' includes a tubular member 25' and a lid
member 26'. An end of the tubular member 25' near the space is an
open end, and the other end of the tubular member 25' has a first
axle hole 261'. The lid member 26' is disposed on the open end of
the tubular member 25' and has a second axle hole 262'
corresponding to the first axle hole 261'. The rotational axle base
3 is rotatably disposed in the first axle hole 261' and the second
axle hole 262', wherein the flow-bypassing passage 5 is disposed at
the end of the tubular member 25' near the space and preferably
substantially along an axis of the rotational axle base 3
(substantially toward the rotational working portion 33).
[0025] In a third embodiment of the present invention shown in FIG.
6, a cylinder 2'' includes a tubular member 25'' and a lid member
26''. An end of the tubular member 25'' remote form the space has a
first axle hole 261'', and the other end of the tubular member 25''
is an open end. The lid member 26'' is disposed on the open end of
the tubular member 25''and has a second axle hole 262''
corresponding to the first axle hole 261''. The rotational axle
base 3 is rotatably disposed in the first axle hole 261'' and the
second axle hole 262'', wherein the flow-bypassing passage 5 is
disposed on the lid member 26'' and preferably substantially along
an axis of the rotational axle base 3 (substantially toward the
rotational working portion 33).
[0026] Furthermore, in a fourth embodiment of the present
invention, a flow-bypassing passage 5' can be disposed through a
part of the main body 1 (formed in a single part or among assembled
parts), and it is preferable that the flow-bypassing passage 5' has
an opening toward the rotational working portion 33 (as shown in
FIG. 7). On the other hand, the flow-bypassing passage can be
formed between the main body 1 and the side wall of the cylinder
(not shown). Any other way will be adaptive as long as the gas can
be guided out into the space.
[0027] In a fifth embodiment of the present invention, a side of an
abutting ring 29 facing the cylinder 2 has an outer ring protrusion
291 and an inner ring recession 292 which is relatively remote from
the cylinder 2, and an end of the flow-bypassing passage is open
toward the inner ring recession. Preferably, a sealing ring member
293 is surroundingly disposed between the outer ring protrusion 291
and the inner ring recession 292. The sealing ring member 293 is
air-tightly abutted against the cylinder 2 and the inner ring
recession 292 so as to make sure that the gas is effectively guided
out into the space 34.
[0028] The present invention further provides a grinding tool 100.
The grinding tool 100 includes the flow-bypassing structure of a
grinding tool shown in the embodiment according to FIG. 1, 2, 3, 4,
5, 6, 7 or 8. In the first embodiment shown in FIGS. 1 to 4, the
grinding tool includes a main body 1, a cylinder 2, a rotor 24 and
a rotational axle base 3. The main body 1 has an intake passage 11
and an exhaust passage 12. The cylinder 2 is disposed in the
interior of the main body 1 and has an air inlet 21 and an air out
let 22. The air inlet 21 is communicated with the intake passage
11, and the air outlet 22 is communicated with the exhaust passage
12. An airflow pathway 23 is defined to be communicated with the
interior of the cylinder 2, the air outlet 22 and the exhaust
passage 12. The rotor 24 is disposed in the cylinder 2. The
rotational axle base is rotatably disposed through the cylinder 2
and in a rotational cooperative relationship with the rotor 24. An
end of the rotational axle base 3 is extended and formed with a
rotational working portion 33 which is operable from the outside of
the cylinder 2. The surroundings of the rotational working portion
33 define a space 34. A flow-bypassing passage 5 is communicated
with the airflow pathway 23 and the space 34, and an end of the
flow-bypassing passage 5 is open toward the space 34.
[0029] Through the present invention, the flow-bypassing passage is
disposed between the airflow pathway and the space to guide part of
the used high pressure gas out into the space. When the high
pressure gas passes the flow-bypassing passage, a jet flow will be
created. The jet flow will blow the axle bearing and the rotational
working portion so as to quickly and effectively reduce the heat
caused by high-speed rotation of the rotational axle base and the
axle bearing. Besides, the particles produced during the grinding
process can be effectively blown away to prevent problems like dirt
accumulation, unsmooth rotation and machine abrasion.
[0030] In addition, the cylinder can be designed to have "a tubular
member and two lid members" or "a tubular member and a lid member"
and detachably assembled; therefore, it is convenient to mount,
dismount, maintain and replace the members, and there is no need to
replace a whole set when a single member is broken.
[0031] Although particular embodiments of the invention have been
described in detail for purposes of illustration, various
modifications and enhancements may be made without departing from
the spirit and scope of the invention. Accordingly, the invention
is not to be limited except as by the appended claims.
* * * * *