CN112283264A

CN112283264A - Bidirectional overrunning clutch

Info

Publication number: CN112283264A
Application number: CN202011128316.0A
Authority: CN
Inventors: 邓志君; 董铸荣; 韩承伟; 朱小春
Original assignee: Shenzhen Polytechnic
Current assignee: Shenzhen Polytechnic
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-01-29
Anticipated expiration: 2040-10-20
Also published as: CN112283264B

Abstract

The application provides a two-way freewheel clutch, it includes drive arrangement, final drive gear, overcoat gear, roller, transmission shaft, drive arrangement's output is connected and is driven final drive gear rotates, final drive gear with overcoat gear engagement, the transmission shaft is located the interior encirclement hollow of overcoat gear, the roller is located the interior encirclement inside wall of overcoat gear with between the transmission shaft, the interior encirclement inside wall of overcoat gear with the corresponding department of roller be equipped with the cover in the nested concave part in the roller outside, nested concave part with there is the clearance between the roller. The bidirectional transmission device has the advantages of bidirectional transmission, simple structure, good transmission effect, convenience in maintenance and wide application range.

Description

Bidirectional overrunning clutch

[ technical field ] A method for producing a semiconductor device

The application relates to a transmission device, in particular to a bidirectional overrunning clutch which is used for a transmission assembly of a power device such as an automatic driving vehicle steering mechanism.

[ background of the invention ]

The bidirectional overrunning clutch is used as a transmission component, is connected with the prime motor and the working machine through two ends, and is used for transmitting or separating power between the prime motor and the working machine. The traditional overrunning clutch can only rotate in one direction, has high energy consumption and can not completely play the role of the clutch, and the bidirectional overrunning clutch can automatically separate or combine with a motion assembly according to the change of the rotating direction, so that the driving part can bidirectionally drive the driven part to rotate, and the driving part does not rotate along with the driven part when the driven part rotates. The existing bidirectional overrunning clutch has the disadvantages of complex structure, more related parts, inconvenient maintenance, high processing cost, difficulty in meeting the steering transmission requirements of automatic driving vehicles and certain limitation.

Therefore, it is necessary to provide a bidirectional overrunning clutch with simple structure, low processing cost, convenient maintenance and good transmission effect.

[ summary of the invention ]

The bidirectional overrunning clutch is simple in structure and good in transmission effect.

In order to realize the purpose of the application, the following technical scheme is provided:

the application provides a two-way freewheel clutch, it includes drive arrangement, final drive gear, overcoat gear, roller, transmission shaft, drive arrangement's output is connected and is driven final drive gear rotates, final drive gear with overcoat gear engagement, the transmission shaft is located the interior encirclement hollow of overcoat gear, the roller is located the interior encirclement inside wall of overcoat gear with between the transmission shaft, the interior encirclement inside wall of overcoat gear with the corresponding department of roller be equipped with the cover in the nested concave part in the roller outside, nested concave part with there is the clearance between the roller.

In some embodiments, the nesting recess is shaped to fit over the outside of the roller; the nesting concave part is a semi-cylindrical groove, or the nesting concave part comprises inclined planes which are connected to form the groove.

In some embodiments, the bidirectional overrunning clutch further comprises a frame, the frame is installed below the outer sleeve gear, the transmission shaft penetrates through the middle of the frame, and the outer sleeve gear is installed in cooperation with the frame.

In some embodiments, the rack is provided with a first installation inner cavity, the outer gear comprises an upper gear part and a lower connecting part, and the lower connecting part is installed in the first installation inner cavity of the rack.

In some embodiments, a first needle bearing is disposed between a side wall of the first mounting cavity of the frame and the lower connecting portion of the outer sleeve gear.

In some embodiments, the bi-directional overrunning clutch further comprises a roller support mounted in the frame between the lower connecting portion of the outer gear and the drive shaft, the roller being mounted on the roller support.

In some embodiments, a second needle bearing is disposed between the roller support and the lower connection portion of the outer sleeve gear.

In some embodiments, a third needle bearing is disposed between the transmission shaft and the frame.

In some embodiments, the frame is provided with a second mounting cavity located below and communicating with the first mounting cavity, and the third needle bearing is disposed between the transmission shaft and a sidewall of the second mounting cavity.

In some further embodiments, a speed reducer is disposed between the driving device and the main transmission gear.

Compared with the prior art, the method has the following advantages:

when the bidirectional rotation of the clutch is realized, the bidirectional movement of the rotating shaft does not influence the movement state of the outer sleeve gear of the driving part, namely the outer sleeve gear does not rotate along with the transmission shaft; when the driving part moves, the driven part can be driven to rotate in the same direction, the transmission shaft is controlled to rotate, and the purpose of power transmission by combining or separating the clutch is achieved.

Through the bidirectional overrunning clutch, the bidirectional overrunning clutch can basically overcome the defects of other overrunning clutches, realizes the requirement of bidirectional transmission, is suitable for power and torque transmission between various working conditions between the main engine and the transmission shaft, and has the advantages of simple structure, convenience in maintenance and wide application range.

[ description of the drawings ]

FIG. 1 is a cross-sectional view of a bi-directional overrunning clutch of the present application;

FIG. 2 is a perspective view of the bi-directional overrunning clutch of the present application;

FIG. 3 is a top view of the present application showing the engagement of a drive shaft with an outer sleeve gear;

FIG. 4 is an enlarged view of a portion a of FIG. 3;

fig. 5 is a view showing a structure of a roller cage according to the present application.

[ detailed description ] embodiments

Referring to fig. 1 to 3, the bidirectional overrunning clutch of the present application includes a driving device 10, a main transmission gear 8, an outer sleeve gear 3, a roller 11, a transmission shaft 7, and a frame 1, wherein the driving device employs a driving motor, an output end of the driving motor is connected to and drives the main transmission gear 8 to rotate, and in a specific embodiment, an output end of the driving motor is connected to the main transmission gear 8 via a speed reducer 9. The main transmission gear 8 is meshed with the outer sleeve gear 3, and the gear transmission ratio i is 4.

Specifically, as shown in the figure, the outer sleeve gear 3 is a structure with meshing teeth on the outside and a hollow through hole in the middle, and the through hole in the middle is an inner ring part of the outer sleeve gear.

The transmission shaft 7 is arranged in the hollow part of the inner ring part of the outer sleeve gear 3 and is positioned on the central axis of the outer sleeve gear 3. The rollers 11 are arranged between the inner side wall of the inner ring portion of the outer gear 3 and the transmission shaft 7, nesting concave portions 12 which are sleeved outside the rollers are arranged at positions, corresponding to the rollers 11, of the inner side wall of the inner ring portion of the outer gear 3, and a gap exists between the nesting concave portions and the rollers, and in a specific embodiment, the gap can be set to be about 0.5 mm.

In some embodiments, the nesting recess is shaped to fit over the outside of the roller; the nesting concave part is a semi-cylindrical groove, or the nesting concave part comprises inclined planes which are connected to form the groove. In the embodiment shown in the figures, the nesting recess comprises inclined planes connected to form a groove, and an inner chamfer is formed between the inclined planes in a connecting manner.

As shown in fig. 3 and 4, the distance between the inner sidewall of the inner ring portion and the axis of the transmission shaft 7 is smaller than the sum of the radius of the transmission shaft 7 and the diameter of the roller 11, the nested recess is continuous with the inner sidewall of the inner ring portion, the distance between any point of the nested recess 12 and the axis of the transmission shaft 7 is greater than the distance between the inner sidewall of the inner ring portion and the axis of the transmission shaft 7, and the distance between the farthest point of the nested recess from the axis of the transmission shaft 7 and the axis of the transmission shaft 7 is greater than the sum of the radius of the transmission shaft and the diameter of the roller, that is, there is a gap between the nested recess and the.

The bidirectional overrunning clutch further comprises a roller bracket 6, and the roller bracket is mounted on the rack. Referring to fig. 5, in particular, the roller bracket 6 includes a fixing portion 61 and a plurality of clamping portions 62 distributed at intervals, the fixing portion 61 is installed in the frame 1, and the rollers 11 are installed between the clamping portions 62.

As shown in fig. 1 and 2, frame 1 install in 3 below overcoat gears, just transmission shaft 7 passes 1 middle part of frame, frame 1 is equipped with first installation inner chamber, is located first installation inner chamber below and the second installation inner chamber that is linked together, overcoat gears 3 with 1 cooperation installation of frame, it is concrete, overcoat gears 3 include upper gear portion and lower floor's connecting portion, upper gear portion with main drive gear meshes, lower floor's connecting portion install in the first installation inner chamber of frame 1, the lower floor's connecting portion of overcoat gears is greater than to the center pin distance the distance of the inner ring part inside wall of overcoat gears to the center pin. The roller support 6 is arranged between the lower-layer connecting part and the transmission shaft 7.

A first needle bearing 2 is arranged between the side wall of the first mounting inner cavity of the frame 1 and the lower layer connecting part of the outer sleeve gear 3. And a second needle bearing 4 is arranged between the roller bracket 6 and the lower-layer connecting part of the outer sleeve gear 3. And a third needle bearing 5 is arranged between the transmission shaft 7 and the side wall of the second mounting inner cavity of the frame 1.

When the outer sleeve gear 3 rotates to the inner wall of the nesting concave part 12 and contacts with the roller 11, the roller 11 can be driven to move in the same direction, and due to the action of friction force, the transmission shaft 7 is driven to rotate by the movement of the roller 11, so that the clutch transmits torque, and the purpose that the outer sleeve gear 3 drives the transmission shaft 7 is achieved; when the outer sleeve gear 3 does not move and the transmission shaft 7 rotates, the nested concave part and the roller 11 have a gap and cannot transmit the torque to the outer sleeve gear 3, and the clutch is in a separated state and does not transmit the torque.

According to the bidirectional overrunning clutch, when the output power of a driving motor at a driving end is transmitted to a main transmission gear after being subjected to the speed reduction and torque increase effects of the speed reducer 9, the main transmission gear 8 meshed with the outer sleeve gear 3 rotates, and the outer sleeve gear 3 can rotate along with the main transmission gear 8 by respectively arranging the first needle bearing 2 and the second needle bearing 4 between the outer sleeve gear 3 and the rack 1 and between the outer sleeve gear and the roller support 6.

Because the inner ring part of the outer sleeve gear 3 is provided with the nested concave part, the outer sleeve gear is contacted with the roller 11 on the roller bracket 6 in the rotating process, the transmission shaft 7 contacted with the roller 11 rotates in the same direction under the action of friction force, and the bidirectional overrunning clutch is in a combined state, thereby realizing the purpose of bidirectional torque transmission. A third needle bearing 5 structure is arranged between the transmission shaft 7 and the frame 1, so that the transmission shaft 7 is not in contact with the roller bracket 6; meanwhile, a roller 11 structure is arranged between the transmission shaft and the roller bracket 6, so that the transmission shaft can rotate in two directions.

When the motor does not work and the driving end loses power, the outer sleeve gear 3 does not rotate, at the moment, when the transmission shaft 7 rotates bidirectionally, the motion state of the outer sleeve gear 3 is not influenced due to the action of the third needle bearing 5 and the roller 11, the outer sleeve gear cannot be driven to move, and at the moment, the bidirectional overrunning clutch is in a separation state and does not transmit torque.

The device can overcome the problems that the traditional overrunning clutch cannot rotate in two directions, is complex in structure, inconvenient to maintain and the like, has a wide application range, and has important significance for improving the requirements of steering transmission and the like of the automatic driving vehicle.

The above description is only a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any equivalent changes based on the technical solutions of the present application are included in the protection scope of the present application.

Claims

1. The bidirectional overrunning clutch is characterized by comprising a driving device, a main transmission gear, an outer sleeve gear, a roller and a transmission shaft, wherein the output end of the driving device is connected with and drives the main transmission gear to rotate, the main transmission gear is meshed with the outer sleeve gear, the transmission shaft is arranged in the hollow part of the inner ring part of the outer sleeve gear, the roller is arranged between the inner side wall of the inner ring part of the outer sleeve gear and the transmission shaft, a nesting concave part sleeved on the outer side of the roller is arranged at the position, corresponding to the roller, of the inner side wall of the inner ring part of the outer sleeve gear, and a gap is reserved between the nesting concave part and the roller.

2. The bi-directional overrunning clutch according to claim 1, wherein said nesting recess is shaped to fit over said roller; the nesting concave part is a semi-cylindrical groove, or the nesting concave part comprises inclined planes which are connected to form the groove.

3. The bi-directional overrunning clutch according to claim 2, further comprising a frame, wherein said frame is mounted below said outer gear, and wherein said drive shaft extends through a middle portion of said frame, said outer gear being mounted in engagement with said frame.

4. The bi-directional overrunning clutch according to claim 3, wherein said housing defines a first mounting cavity, said outer housing gear includes an upper gear portion and a lower coupling portion, said lower coupling portion being mounted within said first mounting cavity of said housing.

5. The bi-directional overrunning clutch according to claim 4, wherein a first needle bearing is disposed between a side wall of the first mounting cavity of the housing and the lower connecting portion of the outer gear.

6. The bi-directional overrunning clutch according to claim 5, further comprising a roller carrier mounted in said housing between said lower link portion of said outer gear and said drive shaft, said rollers being mounted on said roller carrier.

7. The bi-directional overrunning clutch according to claim 6, wherein a second needle bearing is disposed between said roller carrier and said lower connecting portion of said outer sleeve gear.

8. The bi-directional overrunning clutch according to claim 7, wherein a third needle bearing is disposed between said drive shaft and said housing.

9. The overrunning coupler according to claim 8, wherein said housing defines a second mounting cavity disposed below and in communication with said first mounting cavity, and said third needle bearing is disposed between said drive shaft and a sidewall of said second mounting cavity.

10. The overrunning clutch according to any one of claims 1 to 9, wherein a speed reducer is provided between said drive means and said final drive gear.