Bidirectional overrunning lock-up clutch assembly

Abstract

The utility model discloses a bidirectional overrunning lock-up clutch assembly which comprises an input shaft, an output shaft, an input shaft shell and an output shaft shell, the input shaft is connected with the input shaft shell through a bearing, the output shaft is connected with the output shaft shell through a bearing, and wedge-shaped grooves are evenly distributed in the end, close to the input shaft, of the output shaft. A shifting block is arranged at the position, corresponding to the wedge-shaped groove, of the input shaft, the wedge-shaped groove comprises a first containing part, a transition part and a second containing part which are sequentially arranged in the circumferential direction of the output shaft, rollers are arranged in the first containing part and the second containing part respectively, and the first containing part and the second containing part are combined with the inner circumferential wall of the output shaft shell to form a closed space. The side walls of the first containing part and the second containing part are further provided with abutting springs, and a horn mouth used for being connected with the roller in a clamped mode is formed between the side wall of the shifting block and the wedge-shaped groove transition part. The structure layout is reasonable, bidirectional efficient power transmission is achieved, meanwhile, instant rigid locking can be achieved when the mechanism is impacted, and stable use of the structure is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to a bidirectional overrunning lock-up clutch assembly for applications requiring bidirectional power transmission and bidirectional overload protection (such as vehicle wheel hub drive, servo mechanism protection, etc.). Background Technology

[0002] One-way clutches are a common and fundamental component in mechanical transmissions. Their core function is to enable unidirectional power transmission and reverse locking between the driving and driven components. For example, the hub-mounted one-way clutches used in the front wheel hubs of traditional four-wheel drive vehicles allow the wheels to automatically engage (transmit power) or disengage (idle / lock) with the drive shaft under specific conditions, enabling switching between two-wheel drive and four-wheel drive modes and reducing parasitic losses. With technological advancements, modern four-wheel drive systems mostly employ electronically controlled multi-plate clutch-type center differentials or axle-end clutches. These systems react quickly and control precisely, pre-engaging four-wheel drive before wheel slippage and effectively eliminating transmission losses in non-drive states (such as when the front drive shaft disconnects). Therefore, the application of purely mechanical hub-mounted one-way clutches in new vehicles is gradually decreasing. However, in certain specific applications, such as cost-sensitive situations, those seeking ultimate reliability, or requiring purely mechanical solutions, as well as areas requiring bidirectional power transmission and bidirectional overload protection, existing one-way clutches or complex electronic control systems may not be the optimal choice. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a bidirectional overrunning lock-up clutch assembly with a reasonable structural layout. While achieving efficient bidirectional power transmission, it can also achieve instantaneous rigid locking when subjected to impact, ensuring stable use of the structure.

[0004] To achieve the above objectives, this utility model provides a bidirectional overrunning lock-up clutch assembly, including an input shaft, an output shaft, an input shaft housing, and an output shaft housing. The input shaft is connected to the input shaft housing via bearings, and the output shaft is connected to the output shaft housing via bearings. The output shaft housing and the input shaft housing are fixedly connected by a connecting pin. A drive shaft is connected to the input shaft, and a gear shaft is connected to the output shaft. Wedge-shaped grooves are evenly distributed at one end of the output shaft near the input shaft. A shift block is provided on the input shaft corresponding to the position of the wedge-shaped groove. The wedge-shaped grooves include a portion extending along the circumference of the output shaft. A first receiving portion, a transition portion, and a second receiving portion are arranged sequentially. Rollers are respectively provided in the first receiving portion and the second receiving portion. The first receiving portion and the second receiving portion are combined with the inner peripheral wall of the output shaft housing to form a closed space. A stop spring is also provided on the side wall of the first receiving portion and the second receiving portion. The stop spring abuts against the roller. The outer wall of the shift block is longer than the inner wall of the shift block. The outer wall and the inner wall of the shift block are connected by an inclined side wall. A flared opening for engaging with the roller is formed between the side wall of the shift block and the wedge-shaped groove transition portion.

[0005] The beneficial effects of this design are as follows: During transmission, the input shaft rotates, and the pawl abuts against the rollers in the direction of rotation, compressing the abutment springs. At this time, the angle between the side wall of the pawl and the bottom surface of the first or second receiving part is almost a right angle, thus transmitting power through the rollers to drive the output shaft to rotate. Simultaneously, in this state, one side of the pawl enters the space of the receiving part, making the other side wall of the pawl the transition part of the wedge groove. The rollers, due to the rotation of the output shaft, compress the springs, thus creating a transmission direction overshoot. Furthermore, it can lock under vibration and impact, preventing structural reversal and ensuring structural stability. After the structure stops operating, the input shaft no longer receives power, and the rollers are in a critical locking state under the action of the abutment springs on both sides. This structure uses the preload of the abutment springs to keep the rollers stationary at the critical point, eliminating transmission idle travel, improving locking response speed, and the radial component force generated by the inclined surface of the pawl reduces the starting torque by 70%, eliminating the risk of jamming. At the same time, the wedge groove structure is rationally designed, making good use of space and effectively improving the structural stability.

[0006] As a further feature of this invention, positioning grooves are provided on the side walls of the first accommodating part and the second accommodating part, and the abutting spring is disposed in the positioning groove.

[0007] The advantages of this design are: it ensures the stability of the contact spring's position, prevents the spring from shifting, guarantees the stability of the structure, and is simple to implement, resulting in good performance.

[0008] As a further feature of this invention, the wedge-shaped grooves are three in number and evenly distributed on the output shaft.

[0009] The beneficial effects of this design are: it effectively improves the stability of the structure, while the structural layout is reasonable, reliable, and has good performance.

[0010] As a further feature of this invention, the input shaft and the output shaft are respectively fitted with retaining rings, which abut against the inner ring sidewall of the corresponding bearing.

[0011] The advantages of this design are: it ensures structural stability, keeps the structure simple, prevents loosening, and provides good performance.

[0012] As a further feature of this invention, baffles are fitted on the input shaft housing and the output shaft housing respectively, and the baffles abut against the outer ring sidewall of the corresponding bearing.

[0013] The advantages of this design are: it ensures structural stability, keeps the structure simple, prevents loosening, and provides good performance. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of an embodiment of the present utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the wedge groove position in an embodiment of the present invention. Detailed Implementation

[0016] This utility model provides an embodiment of a bidirectional overrunning lock-up clutch assembly, such as... Figures 1 to 2As shown, the device includes an input shaft 1, an output shaft 2, an input shaft housing 3, and an output shaft housing 4. The input shaft 1 is connected to the input shaft housing 3 via a bearing 5, and the output shaft 2 is connected to the output shaft housing 4 via a bearing 5. The output shaft housing 4 and the input shaft housing 3 are fixedly connected by a connecting pin. A drive shaft 12 is connected to the input shaft 1, and a gear shaft 21 is connected to the output shaft 2. Wedge-shaped grooves 7 are evenly distributed on one end of the output shaft 2 near the input shaft 1. A lever 13 is provided on the input shaft 1 corresponding to the position of the wedge-shaped grooves 7. The wedge-shaped grooves 7 include first receiving portions 7 arranged sequentially along the circumference of the output shaft 2. 1. A transition portion 72 and a second receiving portion 73, wherein a contact spring 61 is provided on the side wall of the first receiving portion 71 for abutting the roller 6 between the first receiving portion 71 and the inner wall of the output shaft housing 4, and a contact spring 61 is provided on the side wall of the second receiving portion 73 for abutting the roller 6 between the second receiving portion 73 and the inner wall of the output shaft housing 4, wherein the outer wall of the lever 13 is longer than the inner wall of the lever 13, and the outer wall and the inner wall of the lever 13 are connected by an inclined side wall, and a flared opening for engaging with the roller 6 is formed between the side wall of the lever 13 and the transition portion 72 of the wedge groove 7. The beneficial effects of this configuration are as follows: When the input shaft 1 rotates during transmission, the lever 13 abuts against the roller 6 in the direction of rotation and compresses the abutment spring 61. At this time, the angle between the side wall of the lever 13 and the bottom surface of the first accommodating part 71 or the second accommodating part 73 is almost a right angle, thereby transmitting power through the roller 6 and driving the output shaft 2 to rotate. At the same time, in this state, one side of the lever 13 enters the space where the accommodating part is located, so that the other side wall of the lever 13 is located at the position of the transition part 72 of the wedge groove 7. At this time, the roller 6 compresses the spring due to the rotation of the output shaft 2, thereby creating a transmission direction overshoot. At the same time, it can also lock when subjected to vibration and impact, preventing structural reversal and ensuring the stability of the structure. After the structure stops operating, the input shaft 1 no longer has power input, and under the action of the abutment springs 61 on both sides, the roller 6 is in a critical locking state. With this structure, the preload of the contact spring 61 keeps the roller 6 stationary at the critical point, eliminating transmission idle travel, improving locking response speed, and the radial component force generated by the inclined surface of the pawl reduces the starting torque by 70%, eliminating the risk of jamming. At the same time, the wedge groove 7 structure is reasonably designed, with good space utilization, effectively improving the stability of the structure.

[0017] As a further feature of this invention, positioning grooves are provided on the side walls of the first accommodating part 71 and the second accommodating part 73, and the abutment spring 61 is disposed in the positioning grooves. The advantages of this design are: it ensures the stability of the position of the abutment spring 61, prevents the spring from shifting, guarantees the stability of the structure, and is simple in structure, easy to implement, and has good performance.

[0018] As a further feature of this invention, the wedge-shaped grooves 7 are three in number and evenly distributed on the output shaft 2. The advantages of this arrangement are: it effectively improves the stability of the structure, while also ensuring a reasonable structural layout, reliable operation, and good performance.

[0019] As a further feature of this invention, retaining rings 11 are respectively fitted on the input shaft 1 and the output shaft 2, and the retaining rings 11 abut against the inner ring sidewall of the corresponding bearing 5. The advantages of this arrangement are: it ensures structural stability, maintains a simple structure, prevents loosening, and provides good performance.

[0020] As a further feature of this invention, baffles 31 are respectively fitted onto the input shaft housing 3 and the output shaft housing 4, and the baffles 31 abut against the outer ring sidewall of the corresponding bearing 5. The advantages of this design are: it ensures structural stability, maintains a simple structure, prevents loosening, and provides good performance.

[0021] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A bidirectional overrunning lock-up clutch assembly, comprising an input shaft, an output shaft, an input shaft housing, and an output shaft housing, wherein the input shaft is connected to the input shaft housing via bearings, the output shaft is connected to the output shaft housing via bearings, the output shaft housing and the input shaft housing are fixedly connected by a connecting pin, a drive shaft is connected to the input shaft, and a gear shaft is connected to the output shaft, characterized in that: The output shaft has wedge-shaped grooves evenly distributed at one end near the input shaft. A lever is provided on the input shaft corresponding to the position of the wedge-shaped groove. The wedge-shaped groove includes a first receiving part, a transition part, and a second receiving part arranged sequentially along the circumference of the output shaft. Rollers are respectively provided in the first receiving part and the second receiving part. The first receiving part and the second receiving part are respectively combined with the inner peripheral wall of the output shaft housing to form a closed space. A stop spring is also provided on the side wall of the first receiving part and the second receiving part. The stop spring abuts against the roller. The outer wall of the lever is longer than the inner wall of the lever. The outer wall and the inner wall of the lever are connected by an inclined side wall. A flared opening is formed between the side wall of the lever and the transition part of the wedge-shaped groove for engaging with the roller.

2. The bidirectional overrunning lock-up clutch assembly according to claim 1, characterized in that: The first accommodating part and the second accommodating part are provided with positioning grooves on their side walls, and the abutting spring is disposed in the positioning groove.

3. The bidirectional overrunning lock-up clutch assembly according to claim 1, characterized in that: The wedge-shaped grooves are three in number and are evenly distributed on the output shaft.

4. The bidirectional overrunning lock-up clutch assembly according to claim 1, characterized in that: The input shaft and output shaft are respectively fitted with retaining rings, which abut against the inner ring sidewall of the corresponding bearing.

5. The bidirectional overrunning lock-up clutch assembly according to claim 1, characterized in that: The input shaft housing and the output shaft housing are respectively fitted with baffles, which abut against the outer ring sidewall of the corresponding bearing.

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