CN216343543U - Large-torque overrunning clutch - Google Patents
Large-torque overrunning clutch Download PDFInfo
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- CN216343543U CN216343543U CN202123063086.7U CN202123063086U CN216343543U CN 216343543 U CN216343543 U CN 216343543U CN 202123063086 U CN202123063086 U CN 202123063086U CN 216343543 U CN216343543 U CN 216343543U
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- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Abstract
In order to solve the problems of difficult processing, lower conduction torque, shorter service life and the like of the overrunning clutch in the prior art, the utility model provides a high-torque overrunning clutch which comprises a driving shaft, a driven shaft, a supporting bearing, a resistance spring, a bearing ring and a one-way bearing; the driven shaft is a cylindrical shaft with supporting bearing steps at two ends and can be rotatably sleeved on the outer side of the driving shaft; the two support bearings are respectively arranged at the two ends of the driving shaft; the resistance spring is arranged on the driving shaft and is respectively in sliding fit with the outer circle of the driving shaft and the inner wall of the driven shaft; the bearing rings are circular rings with rectangular cross sections, and are two, and are respectively welded at two ends of the resistance spring; the inner ring of the one-way bearing is welded with the bearing ring on the left side of the resistance spring, and the outer ring of the one-way bearing is fixed on the inner circle of the driven shaft bearing step. The utility model has the beneficial technical effects of simple structure, lower manufacturing cost and higher torque transmission capability.
Description
Technical Field
The utility model relates to a large-torque overrunning clutch technology, in particular to a large-torque overrunning clutch.
Background
An overrunning clutch (also called a one-way clutch or a one-way bearing) is a basic component appearing along with the development of mechatronic products, and is an important component used between a driving shaft and a driven shaft to realize the functions of power transmission and power separation. Generally, when the rotating speed of a driving shaft is higher than that of a driven shaft, the driving shaft can realize power transmission to the driven shaft; otherwise, the driving shaft and the driven shaft are separated, and the driven shaft can rotate freely. Or when the driving shaft rotates positively relative to the driven shaft, the driving shaft can realize power transmission to the driven shaft; otherwise, the driving shaft and the driven shaft are separated, and the driving shaft can rotate freely.
The overrunning clutches in the prior art are divided into wedge type overrunning clutches, ball type overrunning clutches and ratchet type overrunning clutches, and power transmission or separation is realized by adopting a friction pair consisting of a wedge block, an inner raceway and an outer raceway or by adopting a conjugate surface of a cylinder and a cylinder hole. However, most of these overrunning clutches have the problems of difficult processing, low transmission torque, short service life, etc. A typical example is a one-way ball or roller bearing, in which the inner ring or outer ring of the bearing can rotate freely when rotating in a certain direction; when the rotor rotates in the other direction, the rotor cannot rotate freely and can only rotate together with the corresponding outer ring or inner ring. The one-way bearing has better power transmission or separation performance, but transmits smaller moment. If the torque transmitted is large, it may fail sooner.
Obviously, the overrunning clutch in the prior art has the problems of difficult processing, low conduction torque, short service life and the like.
Disclosure of Invention
The utility model provides a high-torque overrunning clutch, which aims to solve the problems of difficult processing, low conduction torque, short service life and the like of the overrunning clutch in the prior art.
The utility model relates to a large-torque overrunning clutch which comprises a driving shaft, a driven shaft, a supporting bearing, a resistance spring, a bearing ring and a one-way bearing, wherein the driving shaft is connected with the driving shaft; the driven shaft is a cylindrical shaft with supporting bearing steps at two ends and can be rotatably sleeved on the outer side of the driving shaft; the two support bearings are respectively arranged at two ends of the driving shaft, the inner ring of each support bearing is fixed on the excircle of the driving shaft, and the outer ring of each support bearing is fixed on the inner circle of the bearing step of the driven shaft; the resistance spring is a close-packed spring wound clockwise, is arranged on the driving shaft and is respectively matched with the outer circle of the driving shaft and the inner wall of the driven shaft in a sliding manner; the bearing ring is a circular ring with a rectangular cross section, and the inner diameter and the outer diameter of the bearing ring are respectively matched with the inner diameter and the outer diameter of the resistance spring; the two bearing rings are respectively welded at two ends of the resistance spring; the one-way bearing is a one-way bearing with an inner ring capable of freely rotating clockwise and is arranged between the support bearing on the left side of the driving shaft and the resistance spring, the diameter of the inner ring of the one-way bearing is larger than the outer diameter of the driving shaft and is welded with the bearing ring on the left side of the resistance spring, and the outer ring of the one-way bearing is fixed on the inner circle of the bearing step of the driven shaft.
Furthermore, the number of the resistance springs is two, the thread pitch of the resistance springs is larger than the diameter of the steel wire for winding the resistance springs, and the resistance springs are arranged on the circumference in an angle of 180 degrees.
Furthermore, the number of the resistance springs is three, the thread pitch of the resistance springs is larger than the diameter of two times of the steel wire for winding the resistance springs, and the resistance springs are arranged at 120 degrees on the circumference.
Furthermore, the cross section of the wound steel wire of the resistance spring is rectangular.
The large-torque overrunning clutch has the beneficial technical effects of simple structure, lower manufacturing cost and higher torque transmission capability.
Drawings
FIG. 1 is a schematic cross-sectional view of a high torque overrunning clutch of the present invention;
FIG. 2 is a schematic three-dimensional structure of a resistance spring and load ring of the present invention;
FIG. 3 is a schematic structural diagram of two resistance springs according to the present invention;
FIG. 4 is a schematic structural view of three resistance springs according to the present invention;
fig. 5 is a schematic cross-sectional view of a resistance spring of the present invention having a rectangular cross-section.
The high torque overrunning clutch of the present invention will be further described with reference to the accompanying drawings and the following detailed description.
Detailed Description
FIG. 1 is a schematic cross-sectional view of a high torque overrunning clutch of the present invention, and FIG. 2 is a schematic three-dimensional structure of a drag spring and a load ring of the present invention; in the figure, 1 is a driving shaft, 2 is a driven shaft, 3 and 4 are supporting bearings, 5 is a resistance spring, 6 is a bearing ring, and 7 is a one-way bearing. As can be seen from the figure, the large-torque overrunning clutch comprises a driving shaft 1, a driven shaft 2, supporting bearings (3, 4), a resistance spring 5, a bearing ring 6 and a one-way bearing 7; the driven shaft 2 is a cylindrical shaft with supporting bearing steps at two ends and can be rotatably sleeved on the outer side of the driving shaft 1; the two support bearings (3 and 4) are respectively arranged at two ends of the driving shaft, the inner ring of each support bearing is fixed on the excircle of the driving shaft, and the outer ring of each support bearing is fixed on the inner circle of the bearing step of the driven shaft; the resistance spring 5 is a clockwise wound close-packed spring, is arranged on the driving shaft and is respectively matched with the outer circle of the driving shaft and the inner wall of the driven shaft in a sliding manner; the bearing ring 6 is a circular ring with a rectangular cross section, and the inner diameter and the outer diameter of the bearing ring are respectively matched with the inner diameter and the outer diameter of the resistance spring; the two bearing rings are respectively welded at two ends of the resistance spring; the one-way bearing 7 is a one-way bearing with an inner ring capable of freely rotating clockwise and is arranged between the support bearing on the left side of the driving shaft and the resistance spring, the diameter of the inner ring of the one-way bearing is larger than the outer diameter of the driving shaft and is welded with the bearing ring on the left side of the resistance spring, and the outer ring of the one-way bearing is fixed on the inner circle of the bearing step of the driven shaft. According to the high-torque overrunning clutch, when the driving shaft rotates clockwise, the driving shaft drives the resistance spring and the inner ring of the one-way bearing to rotate clockwise together. The resistance spring is a close-packed spring wound clockwise and is respectively matched with the excircle of the driving shaft and the inner wall of the driven shaft in a sliding way; therefore, the resistance spring can freely rotate together with the driving shaft without being subjected to external force. And because the one-way bearing is a one-way bearing with an inner ring capable of freely rotating clockwise, the inner ring of the one-way bearing can rotate along with the driving shaft and the resistance spring. When the driving shaft rotates anticlockwise, the driving shaft drives the resistance spring and the one-way bearing inner ring to rotate anticlockwise together. Because the one-way bearing is a one-way bearing with an inner ring capable of freely rotating clockwise, when the one-way bearing rotates anticlockwise, the one-way bearing is subjected to outer ring resistance, so that the resistance spring is in an anticlockwise torsional state, the resistance spring generates a radial expansion under the condition that the left side and the right side of the resistance spring twist against the self-rotation direction, the outer wall of the resistance spring is abutted against the inner wall of the driven shaft, and namely the resistance spring is in the radial expansion abutting process. Because the resistance spring is in sliding fit with the inner wall of the driven shaft, the clearance is small, and the resistance spring is completely tensioned and pressed on the inner wall of the driven shaft after expanding the diameter ring by ring, so that the driven shaft and the driving shaft are driven to rotate anticlockwise. At the moment, the driving shaft and the driven shaft are pressed against the inner wall of the driven shaft by the whole expansion of the resistance spring to form friction force transmission torque, so that large torque load can be borne. And under the condition that most of torque of the resistance spring is transmitted to the driven shaft, the torque born by the one-way bearing is relatively small and can be completely born. When the rotating speed of the driven shaft is higher than that of the driving shaft, the driving shaft is separated from the driven shaft, and the driven shaft can rotate freely. The one-way bearing with mature technology is used as a resistance spring to initiate reverse braking of resistance, so that the high-torque overrunning clutch has a simpler structure, is reliable in operation and is durable in use.
FIG. 3 is a schematic structural diagram of two resistance springs according to the present invention, wherein 5 is a resistance spring, 6 is a load ring, a is a first resistance spring, and b is a second resistance spring. As can be seen from the figure, in order to improve the torque bearing load of the starting anti-impact device of the electric vehicle, the number of the resistance springs is two, the thread pitch of the resistance springs is larger than the diameter of the steel wire for winding the resistance springs, and the resistance springs are arranged on the circumference in an angle of 180 degrees. Therefore, when the resistance spring is wound in a radial contracting manner, two bearing points are arranged between the resistance spring and the bearing ring, so that the bearing capacity can be improved; when the resistance springs are expanded and pressed, two springs are expanded and pressed on the inner wall of the driven shaft, so that the bearing capacity can be improved.
Fig. 4 is a schematic structural diagram of three resistance springs of the present invention, in which 5 is a resistance spring, 6 is a load ring, a is a first resistance spring, b is a second resistance spring, and c is a third resistance spring. As can be seen from the figure, in order to improve the torque bearing load of the starting impact resisting device of the electric vehicle, the number of the resistance springs is three, the thread pitch of the resistance springs is larger than the diameter twice of the steel wire for winding the resistance springs, and the resistance springs are arranged on the circumference in an angle of 120 degrees. So, when the resistance spring is received the footpath and is twined, have three bearing point between resistance spring and carrier ring, can improve bearing capacity when the resistance spring rises the footpath and supports pressing, there are three springs to rise and tightly rise at the driven shaft inner wall, can improve bearing capacity.
Fig. 5 is a schematic sectional view of the resistance spring of the present invention, in which 1 is a driving shaft, 2 is a driven shaft, 3 and 4 are support bearings, 5 is a resistance spring, and 6 is a bearing ring. As can be seen from the figure, in order to further improve the torque bearing load of the starting impact resisting device of the electric vehicle, the cross section of the wound steel wire of the resistance spring is rectangular. Therefore, the friction area between the resistance spring and the inner wall of the driven shaft during radial expansion and abutting can be effectively increased, the friction force is improved, and the torque bearing load is improved.
The large-torque overrunning clutch has the beneficial technical effects of simple structure, lower manufacturing cost and higher torque transmission capability.
Claims (4)
1. A large-torque overrunning clutch is characterized by comprising a driving shaft, a driven shaft, a supporting bearing, a resistance spring, a bearing ring and a one-way bearing; the driven shaft is a cylindrical shaft with supporting bearing steps at two ends and can be rotatably sleeved on the outer side of the driving shaft; the two support bearings are respectively arranged at two ends of the driving shaft, the inner ring of each support bearing is fixed on the excircle of the driving shaft, and the outer ring of each support bearing is fixed on the inner circle of the bearing step of the driven shaft; the resistance spring is a close-packed spring wound clockwise, is arranged on the driving shaft and is respectively matched with the outer circle of the driving shaft and the inner wall of the driven shaft in a sliding manner; the bearing ring is a circular ring with a rectangular cross section, and the inner diameter and the outer diameter of the bearing ring are respectively matched with the inner diameter and the outer diameter of the resistance spring; the two bearing rings are respectively welded at two ends of the resistance spring; the one-way bearing is a one-way bearing with an inner ring capable of freely rotating clockwise and is arranged between the support bearing on the left side of the driving shaft and the resistance spring, the diameter of the inner ring of the one-way bearing is larger than the outer diameter of the driving shaft and is welded with the bearing ring on the left side of the resistance spring, and the outer ring of the one-way bearing is fixed on the inner circle of the bearing step of the driven shaft.
2. The high torque overrunning clutch according to claim 1, wherein the number of the resistance springs is two, and the pitch of the resistance springs is larger than the diameter of the steel wire on which the resistance springs are wound and is arranged 180 degrees on the circumference.
3. The high torque overrunning clutch according to claim 1, wherein the number of the resistance springs is three, and the pitch of the resistance springs is larger than twice the diameter of the steel wire on which the resistance springs are wound and is arranged at 120 degrees on the circumference.
4. The high-torque overrunning clutch according to any one of claims 1 to 3, wherein the cross section of the wound steel wire of the resistance spring is rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123063086.7U CN216343543U (en) | 2021-12-08 | 2021-12-08 | Large-torque overrunning clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123063086.7U CN216343543U (en) | 2021-12-08 | 2021-12-08 | Large-torque overrunning clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216343543U true CN216343543U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123063086.7U Active CN216343543U (en) | 2021-12-08 | 2021-12-08 | Large-torque overrunning clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216343543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114838111A (en) * | 2022-05-17 | 2022-08-02 | 重庆帕特龙智通电子科技有限公司 | Rear-drive transmission of three-wheeled electric vehicle |
-
2021
- 2021-12-08 CN CN202123063086.7U patent/CN216343543U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114838111A (en) * | 2022-05-17 | 2022-08-02 | 重庆帕特龙智通电子科技有限公司 | Rear-drive transmission of three-wheeled electric vehicle |
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Address after: 400050 No. 60-3-16 and 18, Keyuan 4th Road, xietaizi, Jiulongpo District, Chongqing Patentee after: Chongqing Patlong Zhitong Electronic Technology Co.,Ltd. Country or region after: China Address before: 400050 No. 60-3-16 and 18, Keyuan 4th Road, xietaizi, Jiulongpo District, Chongqing Patentee before: CHONGQING PATELONG ZHITONG ELECTRONIC TECHNOLOGY Co.,Ltd. Country or region before: China |
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