CN115823134A - Clutch of self-adjusting pedal force mechanism - Google Patents
Clutch of self-adjusting pedal force mechanism Download PDFInfo
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- CN115823134A CN115823134A CN202310138906.9A CN202310138906A CN115823134A CN 115823134 A CN115823134 A CN 115823134A CN 202310138906 A CN202310138906 A CN 202310138906A CN 115823134 A CN115823134 A CN 115823134A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 230000006698 induction Effects 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001629 suppression Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a clutch of a self-adjusting pedal force mechanism, which relates to the field of automobile clutches and comprises a clutch cover and the like, wherein the clutch cover is arranged on a pressure plate, a diaphragm spring is coaxially pressed between the clutch cover and the pressure plate, a plurality of special-shaped holes are uniformly distributed on the diaphragm spring along the circumference, each supporting nail penetrates through one corresponding special-shaped hole, the head part of the supporting nail and the clutch cover are riveted, a chassis of the supporting nail is positioned below the special-shaped hole, and a supporting ring is sleeved on the chassis of each supporting nail and is tightly pressed between the chassis and the diaphragm spring; the force induction ring is coaxially pressed between the diaphragm spring and the clutch cover, and the supporting leg of the force induction ring penetrates through the special-shaped hole and abuts against the chassis. After the friction plate of the clutch is abraded, the suppression effect on the increase of the pressing force and the separating force is obviously superior to that of the conventional clutch, the performance of the self-adjusting diaphragm spring clutch is close to that of the conventional clutch, fewer parts are required, the manufacturing cost is low, and the driving comfort is ensured.
Description
Technical Field
The invention relates to the field of automobile clutches, in particular to a clutch of a pedal force self-adjusting mechanism.
Background
With the development of the global automobile industry and the improvement of the living standard, people have higher and higher requirements on the comfort of automobiles. The automobile clutch is an important component of an automobile transmission system, plays multiple functions of torque transmission, power cut-off, vibration reduction, overload protection and the like in the transmission system, and the quality of the automobile clutch influences the performance of the whole automobile. During the running process of an automobile, when the clutch is engaged every time, the pressure plate and the driven plate are abraded, and the friction surface sheet of the clutch is normally abraded in the service life. Limited by the structure of the traditional clutch, along with the aggravation of the abrasion of the clutch, the pedal pressure which needs to be applied by a driver is also increased, and the driving comfort is seriously reduced.
There are two types of clutches, one being a conventional Clutch and the other being a Self-Adjusting diaphragm spring Clutch (Self-Adjusting Clutch).
The conventional clutch is normally worn in the use process, so that the pressing force of the clutch is increased, the separating force is correspondingly increased, the pedal force of the clutch is greatly increased, and the driving comfort is reduced. The self-adjusting diaphragm spring clutch can eliminate the defect, after a friction plate of the clutch is abraded in the using process, the force sensing spring is deformed due to the increase of the separating force when the clutch is separated, the diaphragm spring is pushed by the separating bearing to have a gap with the compensating support, the adjusting spring pushes the compensating support ring to move on the inclined plane of the cover to compensate the displacement gap after the deformation of the force sensing spring, the working pressing force of the pressure plate is kept unchanged by changing the displacement of the pressure plate, the maximum separating force is kept constant, and therefore the clutch is convenient to operate. For example, chinese patent document (CN 201351691Y) discloses a self-adjusting diaphragm spring clutch assembly, which is characterized in that an upper support plate and a lower support plate with elasticity are provided, a support rivet rivets the lower support plate, the diaphragm spring and the upper support plate on a clutch cover, a meshing inclined tooth surface is correspondingly provided at a contact part of the upper support plate and the clutch cover, and a compensation plate is provided on the clutch cover. However, the self-adjusting diaphragm spring clutch has a complex structure, and has high performance requirements on various components, which increases the manufacturing difficulty and cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a clutch of a self-pedal force adjusting mechanism.
The purpose of the invention is achieved by the following technical scheme: the clutch of the pedal force self-adjusting mechanism comprises a clutch cover, a supporting ring, a force sensing ring, a diaphragm spring, a pressure plate and a plurality of supporting nails, wherein the clutch cover is covered on the pressure plate, the diaphragm spring is coaxially pressed between the clutch cover and the pressure plate, a plurality of special-shaped holes are uniformly distributed on the diaphragm spring along the circumference, each supporting nail penetrates through one corresponding special-shaped hole, the head part of the supporting nail is riveted with the clutch cover, a chassis of the supporting nail is positioned below the special-shaped hole, and the supporting ring is sleeved on the chassis of each supporting nail so as to be tightly pressed between the chassis and the diaphragm spring; the force induction ring is coaxially pressed between the diaphragm spring and the clutch cover, and the supporting leg of the force induction ring penetrates through the special-shaped hole and abuts against the chassis; the periphery of the clutch cover and the pressure plate is riveted with a plurality of transmission sheets.
As a further technical scheme, the upper surface of the clutch cover is provided with a first recess and a second recess in sequence from outside to inside along the circumferential direction, and the recess directions of the first recess and the second recess both vertically point to the inner side of the clutch cover; the first concave bottom presses on the upper surface of the diaphragm spring to form a first supporting point, and the second concave bottom presses on the upper surface of the force sensing ring to form a second supporting point.
As a further technical scheme, the first supporting point and the supporting ring are located at the corresponding positions of the two sides of the diaphragm spring.
As a further technical scheme, a plurality of contact pins are uniformly distributed along the outer circumference of the force induction ring, the contact pins are pressed on the upper surface of the diaphragm spring, and at least three support legs are arranged between the contact pins at equal intervals along the circumferential direction in an inserting manner.
As a further technical solution, the supporting pins are arranged at intervals along the circumference of the shaped holes, that is, an empty shaped hole is arranged between two adjacent supporting pins passing through the shaped holes.
As a further technical scheme, a plurality of bosses are uniformly distributed on the upper surface of the pressure plate along the circumference, and the lower surface of the diaphragm spring is pressed on the bosses.
As a further technical scheme, a plurality of ear parts are uniformly distributed on the outer side of the pressure plate along the circumference, mounting grooves are formed in the positions, corresponding to the ear parts, on the circumference of the outer side of the clutch cover, a transmission piece is fixed on each ear part through a rivet, and the other end of each transmission piece is riveted on the corresponding mounting groove of the clutch cover.
As a further technical scheme, an avoidance groove is formed in the position, corresponding to the supporting nail chassis, of the upper surface of the pressing plate.
As a further technical scheme, the angle formed by the two sides of the bottom of the first recess is 110 +/-5 degrees, and the angle formed by the two sides of the bottom of the second recess is 110 +/-5 degrees.
The invention has the beneficial effects that:
1. the clutch cover adopts a double-supporting point structure to be in contact with the diaphragm spring and the force sensing ring for supporting, and has one more supporting point compared with the conventional clutch cover, so that the peak value range of the pressing force of the diaphragm spring is widened and flattened;
2. a force induction ring is additionally arranged between the diaphragm spring and the clutch cover, and the force induction ring deforms when working and acts on the diaphragm spring, so that the increase of the required separating force after abrasion is effectively slowed down, the pedal force required by driving is not changed greatly, and the driving comfort is kept;
3. after the friction plate is worn, the effect that the pressing force and the separating force cannot be greatly increased is obviously superior to that of the traditional conventional clutch, the performance of the traditional self-adjusting diaphragm spring clutch is close to that of the traditional self-adjusting diaphragm spring clutch, and compared with the self-adjusting diaphragm spring clutch, the self-adjusting diaphragm spring clutch has the advantages of fewer parts, simpler and more convenient manufacture and lower cost.
Drawings
FIG. 1 is a top view of the structure of the present invention.
Fig. 2 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a partially enlarged view of the region B in fig. 2.
Fig. 4 is a partially enlarged view of the region C in fig. 2.
FIG. 5 is a cross-sectional view of the present invention with the platen removed.
Fig. 6 is a schematic perspective view of the clutch cover removed.
Fig. 7 is a schematic perspective view of the present invention.
FIG. 8 is a schematic view of the platen of the present invention.
FIG. 9 is a schematic view of the force sensing ring of the present invention.
Fig. 10 is a graph of the load characteristic and the release characteristic of the present invention compared to a conventional clutch.
Fig. 11 is a schematic perspective view of the clutch cover and diaphragm spring of the present invention with the cover and diaphragm spring removed.
Description of reference numerals: the clutch comprises a transmission piece 1, a rivet 2, a clutch cover 3, a first recess 31, a second recess 32, a first supporting point 33, a second supporting point 34, a mounting groove 35, a supporting ring 4, a force sensing ring 5, a supporting leg 51, a contact leg 52, a diaphragm spring 6, a special-shaped hole 61, a supporting nail 7, a chassis 71, a pressure plate 8, a boss 81, an ear 82 and an avoiding groove 83.
Detailed description of the preferred embodiments
The invention will be described in detail below with reference to the following drawings:
example (b): as shown in fig. 1 to 9, the clutch of the self pedal force adjusting mechanism includes a transmission piece 1, a rivet 2, a clutch cover 3, a first recess 31, a second recess 32, a first supporting point 33, a second supporting point 34, an installation groove 35, a supporting ring 4, a force sensing ring 5, a supporting leg 51, a contact leg 52, a diaphragm spring 6, a special-shaped hole 61, a supporting nail 7, a chassis 71, a pressure plate 8, a boss 81, an ear 82 and an avoidance groove 83.
Referring to fig. 2, the clutch cover 3 is mounted on the pressure plate 8, the diaphragm spring 6 is coaxially press-fitted between the clutch cover 3 and the pressure plate 8, as shown in fig. 6, a plurality of shaped holes 61 (preferably in a rounded rectangle shape) are uniformly distributed on the diaphragm spring 6 along the circumferential direction, each supporting pin 7 passes through one corresponding shaped hole 61, one of any two adjacent shaped holes 61 is empty (no supporting pin 7 passes through), and one supporting pin 7 passes through the other shaped hole 61. As shown in fig. 4, the heads of the supporting pins 7 are riveted with the clutch cover 3, and the bottom discs 71 of the supporting pins 7 are still under the profiled holes 61, and the supporting rings 4 and the diaphragm springs 6 are kept coaxial and simultaneously sleeved on the bottom discs 71 of the supporting pins 7 (as shown in fig. 11), so that the supporting rings 4 are pressed between the bottom discs 71 and the diaphragm springs 6. Referring to fig. 6, the force-sensing ring 5 is coaxially press-fitted between the diaphragm spring 6 and the clutch cover 3, and the supporting legs 51 of the force-sensing ring 5 pass through the corresponding shaped holes 61 and abut against the chassis 71.
As shown in fig. 1 and 3, a plurality of first recesses 31 and a plurality of second recesses 32 are uniformly and alternately arranged on the upper surface of the clutch cover 3 along the circumferential direction, the first recesses 31 are located on the outer side of the circumference of the second recesses 32, and the recess directions of the first recesses 31 and the second recesses are both vertically directed to the inner side of the clutch cover 3. The bottom of the first recess 31 presses against the upper surface of the diaphragm spring 6, in the contact position, i.e. the first support point 33; the bottom of the second recess 32 presses against the upper surface of the force-sensing ring 5 at the contact location, i.e. the second support point 34. The first support point 33 and the support ring 4 are located at positions corresponding to the positions on both sides (upper and lower surfaces) of the diaphragm spring 6.
Referring to fig. 6, 9 and 11, a plurality of contact pins 52 are uniformly distributed along the outer circumference of the force sensing ring 5, the contact pins 52 press the upper surface of the diaphragm spring 6, three support pins 51 are arranged at intervals along the circumferential direction of all the contact pins 52, and the support pins 51 are inserted between the contact pins 52.
Referring to fig. 4, 6 and 8, a plurality of bosses 81 are uniformly distributed on the upper surface of the pressure plate 8 along the circumference, and the lower surface of the diaphragm spring 6 is pressed against the bosses 81. An avoiding groove 83 is formed in the upper surface of the pressure plate 8 at a position corresponding to the base plate 71 of the supporting pin 7, and when the pressure plate 8 and the clutch cover 3 are close to each other due to long-term use of the clutch, the base plate 71 of each supporting pin 7 is avoided through the avoiding groove 83.
Preferably, as shown in fig. 7 and 8, three ear portions 82 are uniformly distributed on the outer side of the pressure plate 8 along the circumference, mounting grooves 35 are formed on the outer circumference of the clutch cover 3 at positions corresponding to the ear portions 82, a driving plate 1 is fixed on each ear portion 82 through a rivet 2, and the other end of each driving plate 1 is riveted on the corresponding mounting groove 35 on the clutch cover 3. As shown in fig. 3, the angle α formed on both sides of the bottom of the first recess 31 is 110 ± 5 °, and the angle β formed on both sides of the bottom of the second recess 32 is 110 ± 5 °.
The working process of the invention is as follows: referring to fig. 10, a graph of a load characteristic and a release characteristic of the present invention compared to a conventional clutch was obtained through practical tests, in which a dotted line indicates a characteristic curve of the conventional clutch and a solid line indicates a characteristic curve of the clutch of the self-energizing mechanism provided by the present invention. When the clutch is normally worn in the using process, the working point position of the clutch cover assembly changes (as shown in a load curve on the left side in fig. 10), the working point position moves to the left (a curve peak value) according to the inherent performance characteristics of the diaphragm spring, the working pressing force is increased, the force sensing ring deforms, and acts on the diaphragm spring, so that the force value curve peak value of the diaphragm spring can be effectively reduced under the action of the force sensing ring, the force value curve peak value is flattened and widened, the increase of the required separation force after the clutch is worn is effectively slowed down, the change of the pedal force required by driving is small, and the driving comfort is kept.
Experiments prove that after the friction plate of the clutch of the self-adjusting pedal force mechanism provided by the invention is abraded, the pressing force and the separating force cannot be greatly increased, the amplification inhibition effect is obviously superior to that of the traditional conventional clutch, and the performance of the clutch is close to that of the self-adjusting diaphragm spring clutch. The technical scheme fills the blank of the industry and has wide market prospect.
It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.
Claims (9)
1. A clutch of a self-pedal force adjusting mechanism is characterized in that: the clutch cover is characterized by comprising a clutch cover (3), supporting rings (4), a force sensing ring (5), a diaphragm spring (6), a pressure plate (8) and a plurality of supporting nails (7), wherein the clutch cover (3) is installed on the pressure plate (8), the diaphragm spring (6) is coaxially pressed between the clutch cover (3) and the pressure plate (8), a plurality of special-shaped holes (61) are uniformly distributed on the diaphragm spring (6) along the circumference, each supporting nail (7) penetrates through one corresponding special-shaped hole (61), the head of each supporting nail (7) is riveted with the clutch cover (3), a chassis (71) of each supporting nail (7) is positioned below the corresponding special-shaped hole (61), and the supporting rings (4) are sleeved on the chassis (71) of each supporting nail (7) so that the supporting rings (4) are tightly pressed between the chassis (71) and the diaphragm spring (6); the force sensing ring (5) is coaxially pressed between the diaphragm spring (6) and the clutch cover (3), and a supporting leg (51) of the force sensing ring (5) penetrates through the special-shaped hole (61) and abuts against the chassis (71); the periphery of the clutch cover (3) and the pressure plate (8) is riveted with a plurality of transmission sheets (1).
2. The clutch for the self pedal effort mechanism according to claim 1, wherein: the upper surface of the clutch cover (3) is sequentially provided with a first recess (31) and a second recess (32) from outside to inside along the circumferential direction, and the recess directions of the first recess and the second recess are both vertically directed to the inner side of the clutch cover (3); the bottom of the first recess (31) presses on the upper surface of the diaphragm spring (6) to form a first supporting point (33), and the bottom of the second recess (32) presses on the upper surface of the force sensing ring (5) to form a second supporting point (34).
3. The clutch for the self pedal effort mechanism according to claim 2, wherein: the first supporting point (33) and the supporting ring (4) are just positioned at the corresponding positions of the two sides of the diaphragm spring (6).
4. The clutch for the self pedal effort mechanism according to claim 3, wherein: a plurality of contact pins (52) are uniformly distributed along the outer circumference of the force induction ring (5), the contact pins (52) are pressed on the upper surface of the diaphragm spring (6), and at least three support legs (51) are arranged between the contact pins (52) at equal intervals along the circumferential direction in an inserting manner.
5. The clutch of the self pedal effort mechanism according to claim 4, wherein: the supporting nails (7) are arranged at intervals along the circumference of the special-shaped holes (61), namely, an empty special-shaped hole (61) is arranged between two adjacent supporting nails (7) which penetrate through the special-shaped holes (61).
6. The clutch for the self pedal effort mechanism according to claim 5, wherein: a plurality of bosses (81) are uniformly distributed on the upper surface of the pressure plate (8) along the circumference, and the lower surface of the diaphragm spring (6) is pressed on the bosses (81).
7. The clutch for the self pedal effort mechanism according to claim 6, wherein: the clutch cover is characterized in that a plurality of ear parts (82) are uniformly distributed on the outer side of the pressure plate (8) along the circumference, mounting grooves (35) are formed in the corresponding positions of the ear parts (82) on the circumference of the outer side of the clutch cover (3), a transmission piece (1) is fixed on each ear part (82) through a rivet (2), and the other end of each transmission piece (1) is riveted to the corresponding mounting groove (35) on the clutch cover (3).
8. The clutch of the self pedal effort mechanism according to claim 7, wherein: and avoidance grooves (83) are formed in the positions, corresponding to the base plates (71) of the supporting nails (7), of the upper surface of the pressure plate (8).
9. The clutch for the self pedal effort mechanism according to claim 8, wherein: the angle formed by the two sides of the bottom of the first recess (31) is 110 +/-5 degrees, and the angle formed by the two sides of the bottom of the second recess (32) is 110 +/-5 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310138906.9A CN115823134B (en) | 2023-02-21 | 2023-02-21 | Clutch of self-adjusting pedal force mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310138906.9A CN115823134B (en) | 2023-02-21 | 2023-02-21 | Clutch of self-adjusting pedal force mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115823134A true CN115823134A (en) | 2023-03-21 |
| CN115823134B CN115823134B (en) | 2023-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310138906.9A Active CN115823134B (en) | 2023-02-21 | 2023-02-21 | Clutch of self-adjusting pedal force mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN115823134B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130731A (en) * | 1994-12-24 | 1996-09-11 | 菲希特尔及萨克斯有限公司 | Friction clutch with auxiliary spring to assist release force |
| US5988339A (en) * | 1996-11-22 | 1999-11-23 | Exedy Corporation | Configuration for retaining clutch cover assembly release-load compensating conical spring |
| US6161669A (en) * | 1997-05-30 | 2000-12-19 | Valeo | Clutch mechanism for clutch friction with low declutching effort |
| US20040262114A1 (en) * | 2003-04-17 | 2004-12-30 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Self-adjusting clutch |
| CN201351691Y (en) * | 2009-02-06 | 2009-11-25 | 荣成市黄海离合器有限公司 | Self-adjusting diaphragm spring clutch assembly |
| CN201368151Y (en) * | 2009-02-26 | 2009-12-23 | 江苏华裕汽车工业有限公司 | Inductive automatic compensation diaphragm spring clutch |
| CN102235439A (en) * | 2011-04-06 | 2011-11-09 | 朱涛 | Diaphragm clamping clutch with complementary worm control overlaid lifting of platen umbrella ring and thickening of driven plate gasket |
| CN102434597A (en) * | 2011-12-12 | 2012-05-02 | 湖北三环离合器有限公司 | Force-compensating clutch cover assembly |
| CN202280757U (en) * | 2011-10-13 | 2012-06-20 | 浙江铁流离合器股份有限公司 | High-durability high-maneuverability clutch used for microcar |
| CN103629263A (en) * | 2013-11-22 | 2014-03-12 | 宁波宏协离合器有限公司 | Self-adjusting clutch with induction spring |
| CN203717705U (en) * | 2013-11-22 | 2014-07-16 | 宁波宏协离合器有限公司 | Self-adjustment clutch with built-in induction spring and adjustment ring |
-
2023
- 2023-02-21 CN CN202310138906.9A patent/CN115823134B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130731A (en) * | 1994-12-24 | 1996-09-11 | 菲希特尔及萨克斯有限公司 | Friction clutch with auxiliary spring to assist release force |
| US5715921A (en) * | 1994-12-24 | 1998-02-10 | Fichtel & Sachs Ag | Friction clutch with auxiliary spring to assist the release force |
| US5988339A (en) * | 1996-11-22 | 1999-11-23 | Exedy Corporation | Configuration for retaining clutch cover assembly release-load compensating conical spring |
| US6161669A (en) * | 1997-05-30 | 2000-12-19 | Valeo | Clutch mechanism for clutch friction with low declutching effort |
| US20040262114A1 (en) * | 2003-04-17 | 2004-12-30 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Self-adjusting clutch |
| CN201351691Y (en) * | 2009-02-06 | 2009-11-25 | 荣成市黄海离合器有限公司 | Self-adjusting diaphragm spring clutch assembly |
| CN201368151Y (en) * | 2009-02-26 | 2009-12-23 | 江苏华裕汽车工业有限公司 | Inductive automatic compensation diaphragm spring clutch |
| CN102235439A (en) * | 2011-04-06 | 2011-11-09 | 朱涛 | Diaphragm clamping clutch with complementary worm control overlaid lifting of platen umbrella ring and thickening of driven plate gasket |
| CN202280757U (en) * | 2011-10-13 | 2012-06-20 | 浙江铁流离合器股份有限公司 | High-durability high-maneuverability clutch used for microcar |
| CN102434597A (en) * | 2011-12-12 | 2012-05-02 | 湖北三环离合器有限公司 | Force-compensating clutch cover assembly |
| CN103629263A (en) * | 2013-11-22 | 2014-03-12 | 宁波宏协离合器有限公司 | Self-adjusting clutch with induction spring |
| CN203717705U (en) * | 2013-11-22 | 2014-07-16 | 宁波宏协离合器有限公司 | Self-adjustment clutch with built-in induction spring and adjustment ring |
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|---|---|
| CN115823134B (en) | 2023-05-05 |
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Address after: 311100 No. 398 Xingguo Road, Linping Street, Linping District, Hangzhou City, Zhejiang Province Patentee after: Tieliu Co.,Ltd. Address before: 311100 No.398 Xingguo Road, Linping street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG TIELIU CLUTCH Co.,Ltd. |
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