Bidirectional clutch gear set with torsion difference

Abstract

The utility model discloses a bidirectional clutch gear set with torsion difference. The bidirectional clutch gear set comprises a small tooth part, a clutch piece and a large tooth part, wherein the small tooth part is sleeved with the clutch piece, and the large tooth part is sleeved with the clutch piece. The clutch piece comprises a movable C-shaped ring and a movable C-shaped ring, wherein the small tooth part is sleeved with the movable C-shaped ring; the fixed C-shaped ring is arranged on the small tooth part in a sleeving manner, and the fixed C-shaped ring and the movable C-shaped ring are arranged in parallel; the one-way structure is arranged on the movable C-shaped ring in a sleeving manner and is arranged in the large tooth part; and the fixed C-shaped ring and the large tooth part are relatively fixed. According to the utility model, the two groups of C-shaped rings are designed to rub with the toothed bar to realize clutch, and the one-way bearing is designed, so that different clutch torsion can be generated when the toothed bar rotates bidirectionally, boss friction used in the existing device is canceled, and noise generated during clutch is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of transmission, in particular to a two-way clutch gear set with torque difference. Background Art

[0002] Currently, there are many types of clutch gear structures in power transmission mechanisms, but basically the torques for forward and reverse rotations are the same, and the function of different torques for forward and reverse rotations cannot be achieved.

[0003] The existing device (crown structure clutch version) realizes the clutch function through the friction between the side of the rectangular or conical boss and the pit surface. After being used many times, it will cause wear of the parts and cause defects such as reduced clutch torque. In addition, the clutch torque on the market is generally low, and there will be a relatively large clutch impact sound after clutching.

[0004] The existing device (silent structure clutch version) achieves clutch by friction between the C-shaped spring and the opponent. This structure can achieve a silent effect, but cannot achieve the function of different forward and reverse torques.

[0005] The clutch torque of the crown structure will decrease at high temperatures, and the wear rate will accelerate at high temperatures, resulting in the clutch torque being unable to meet performance requirements. It is also possible that the clutch torque will be less than the working torque during operation, causing functional failure or triggering clutch clicking noises.

[0006] The clutch torque of the crown structure is too large at low temperatures and the clutch cannot be triggered. Forced clutching will cause gear breakage due to insufficient gear strength, causing product failure. Utility Model Content

[0007] The purpose of the utility model is to provide a two-way clutch gear set with torque difference to solve the above-mentioned problems existing in the prior art.

[0008] Technical solution: A two-way clutch gear set with torque difference, comprising:

[0009] A small tooth portion, a clutch member sleeved on the small tooth portion, and a large tooth portion sleeved on the clutch member;

[0010] The clutch member comprises:

[0011] A movable C-shaped ring, sleeved on the small tooth portion;

[0012] A fixed C-shaped ring is sleeved on the small tooth portion and arranged in parallel with the movable C-shaped ring;

[0013] A one-way structure is sleeved on the movable C-shaped ring and arranged in the large tooth portion;

[0014] The fixed C-shaped ring is fixed relatively to the large tooth portion.

[0015] When the small tooth portion makes the first turn, it drives the movable C-shaped ring to rotate in the one-way structure, overcomes the friction between the fixed C-shaped ring and itself, rotates, and generates a relatively small clutch torque;

[0016] When the small tooth portion undergoes the second turning, it overcomes the friction between itself and the movable C-shaped ring and the fixed C-shaped ring, rotates, and generates a relatively large clutch torque.

[0017] The utility model realizes clutch by designing two sets of C-shaped rings and the gear rod to rub against each other, and designs a one-way bearing, which can generate different clutch torques when the gear rod rotates in both directions, eliminates the boss friction used in the existing device, and effectively reduces the noise generated during clutch;

[0018] At the same time, it is no longer limited by the spatial structure, can obtain a relatively large clutch torque range, and is easier to control;

[0019] When the customer has the push to run function, a relatively small clutch torque function can be used to achieve a follow-up effect when closing the stroke;

[0020] When making sharp turns or other movements, there is a relatively large clutch torque function in the opening direction, which effectively prevents the clutch from being triggered, while at the same time preventing excessive external force from causing the internal gear system to break.

[0021] In a further embodiment, the one-way structure includes a one-way bearing, but is not limited to a one-way bearing, and can be any one-way structure selected to be suitable for the present solution.

[0022] The outer wall of the movable C-shaped ring and the inner wall of the one-way bearing are precisely transitionally matched to achieve the same one-way function of the movable C-shaped ring and the one-way bearing;

[0023] In a further embodiment, the small tooth portion comprises:

[0024] Small gear;

[0025] A gear rod is connected with the pinion gear.

[0026] In a further embodiment, the movable C-ring and the fixed C-ring are sleeved on the gear rod.

[0027] The movable C-shaped ring and the fixed C-shaped ring are stretched to make their inner walls tightly embrace the cylindrical surface of the gear rod, and the clutch function is achieved through the friction resistance generated;

[0028] In a further embodiment, the large tooth portion comprises:

[0029] Large gear;

[0030] The accommodating groove is connected with the large gear.

[0031] In a further embodiment, the axis of the large gear has an opening, which is adapted to the fixed C-shaped ring and is used to accommodate the fixed C-shaped ring sleeved on the gear rod. A limiting protrusion adapted to the notch of the fixed C-shaped ring is provided in the opening.

[0032] The outer wall of the fixed C-shaped ring is slightly interfered with the inner wall of the axial opening of the large gear, and a limiting protrusion is designed to limit the relative rotation of the fixed C-shaped ring in the large gear.

[0033] In a further embodiment, the one-way bearing is disposed in the accommodating groove, and the outer wall is relatively fixed to the accommodating groove.

[0034] A plurality of notches can be designed on the outer circle of the one-way bearing, and grooves matching the notches can be designed on the inner wall of the receiving groove for limiting and fixing.

[0035] Beneficial effects: The utility model discloses a two-way clutch gear set with a torque difference. The utility model realizes clutching by designing two sets of C-shaped rings and a gear rod for friction, and designs a one-way bearing, which can generate different clutch torques when the gear rod rotates in both directions, eliminates the boss friction used in the existing device, and effectively reduces the noise generated during clutching;

[0036] At the same time, it is no longer limited by the spatial structure, can obtain a relatively large clutch torque range, and is easier to control;

[0037] When the customer has the push to run function, a relatively small clutch torque function can be used to achieve a follow-up effect when closing the stroke;

[0038] When making sharp turns or other movements, there is a relatively large clutch torque function in the opening direction, which effectively prevents the clutch from being triggered, while at the same time preventing excessive external force from causing the internal gear system to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the utility model.

[0040] Figure 2 It is an explosion schematic diagram of the utility model.

[0041] Figure 3 It is a schematic diagram of the limiting protrusion of the utility model.

[0042] The accompanying drawings are marked as follows:

[0043] 1. small tooth portion; 11. small gear; 13. gear rod;

[0044] 2. Clutch; 21. One-way structure; 22. Active C-ring; 23. Fixed C-ring;

[0045] 3. Large tooth portion; 31. Accommodating groove; 32. Large gear; 321. Limiting protrusion. DETAILED DESCRIPTION

[0046] The present application relates to a bidirectional clutch gear set with a torque difference, which is explained in detail below through a specific implementation method.

[0047] A two-way clutch gear set with torque difference, comprising:

[0048] A small tooth portion 1, a clutch member 2 sleeved on the small tooth portion 1, and a large tooth portion 3 sleeved on the clutch member 2;

[0049] The clutch member 2 comprises:

[0050] A movable C-shaped ring 22, sleeved on the small tooth portion 1;

[0051] A fixed C-shaped ring 23 is sleeved on the small tooth portion 1 and arranged in parallel with the movable C-shaped ring 22;

[0052] The one-way structure 21 is sleeved on the movable C-shaped ring 22 and arranged in the large tooth portion 3;

[0053] The fixed C-shaped ring 23 is fixed relative to the large toothed portion 3 .

[0054] When the small tooth portion 1 makes the first turn, it drives the movable C-shaped ring 22 to rotate in the one-way structure 21, and overcomes the friction between the fixed C-shaped ring 23 and itself, and rotates to generate a relatively small clutch torque;

[0055] When the small tooth portion 1 makes the second turning, it overcomes the friction between itself and the movable C-shaped ring 22 and the fixed C-shaped ring 23, and rotates to generate a relatively large clutch torque.

[0056] The utility model realizes clutch by designing two sets of C-shaped rings to rub against the gear rod 13, and designs a one-way bearing, which can generate different clutch torques when the gear rod 13 rotates in both directions, eliminates the boss friction used in the existing device, and effectively reduces the noise generated during clutch;

[0057] At the same time, it is no longer limited by the spatial structure, can obtain a relatively large clutch torque range, and is easier to control;

[0058] When the customer has the push to run function, a relatively small clutch torque function can be used to achieve a follow-up effect when closing the stroke;

[0059] When making sharp turns or other movements, there is a relatively large clutch torque function in the opening direction, which effectively prevents the clutch from being triggered, while at the same time preventing excessive external force from causing the internal gear system to break.

[0060] The one-way structure 21 includes a one-way bearing.

[0061] The outer wall of the movable C-shaped ring 22 and the inner wall of the one-way bearing are precisely transitionally matched to achieve the same one-way function of the movable C-shaped ring 22 and the one-way bearing;

[0062] The small tooth portion 1 comprises:

[0063] Pinion 11;

[0064] The gear rod 13 is connected to the pinion gear 11 .

[0065] The movable C-shaped ring 22 and the fixed C-shaped ring 23 are sleeved on the gear rod 13 .

[0066] The movable C-shaped ring 22 and the fixed C-shaped ring 23 are stretched to make their inner walls tightly embrace the cylindrical surface of the gear rod 13, and the clutch function is achieved through the friction resistance generated;

[0067] The large tooth portion 3 comprises:

[0068] Large gear 32;

[0069] The accommodating groove 31 is connected to the large gear 32 .

[0070] The axis of the large gear 32 has an opening, which is matched with the fixed C-shaped ring 23 and is used to accommodate the fixed C-shaped ring 23 sleeved on the gear rod 13. A limiting protrusion 321 matched with the notch of the fixed C-shaped ring 23 is provided in the opening.

[0071] The outer wall of the fixed C-shaped ring 23 is slightly interference fit with the inner wall of the axial opening of the large gear 32 , and a limiting protrusion 321 is designed to limit the relative rotation of the fixed C-shaped ring 23 in the large gear 32 .

[0072] The one-way bearing is disposed in the receiving groove 31 , and the outer wall and the receiving groove 31 are relatively fixed.

[0073] A plurality of notches may be designed on the outer circle of the one-way bearing, and grooves matching the notches may be designed on the inner wall of the receiving groove 31 for limiting and fixing.

[0074] Working principle description: Assume that the rotation direction of the one-way bearing is the first direction;

[0075] The first direction is clutched. When the pinion 11 rotates in the first direction, due to the one-way function of the one-way bearing, the pinion 11 drives the gear rod 13 to rotate in the first direction, and then drives the movable C-shaped ring 22 to rotate along the inner wall of the one-way bearing in the first direction, so that the pinion 11 drives the gear rod 13 and drives the movable C-shaped ring 22 to rotate in the first direction without resistance along the inner wall of the one-way bearing. At this time, the gear rod 13 and the fixed C-shaped ring 23 slide relative to each other, and the fixed C-shaped ring 23 rubs against the gear rod 13, generating a small clutch torque to complete the work;

[0076] The second direction is clutched. When the pinion 11 rotates in the second direction, due to the one-way function of the one-way bearing, the one-way bearing generates infinite resistance to the movable C-shaped ring 22 in the second direction, preventing the movable C-shaped ring 22 from rotating in the second direction. As the input torque of the gear rod 13 gradually increases, the movable C-shaped ring 22 and the gear rod 13 slide relative to each other. At the same time, the gear rod 13 and the fixed C-shaped ring 23 slide relative to each other. The fixed C-shaped ring 23, the movable C-shaped ring 22 and the gear rod 13 rub against each other, generating a large clutch torque to complete the work.

[0077] The preferred specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above specific implementation modes. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A two-way clutch gear set with torque difference, comprising: A small tooth portion (1), a clutch member (2) sleeved on the small tooth portion (1), and a large tooth portion (3) sleeved on the clutch member (2); Characterized in that the clutch member (2) comprises: A movable C-shaped ring (22) sleeved on the small tooth portion (1); A fixed C-shaped ring (23) is sleeved on the small tooth portion (1) and is arranged in parallel with the movable C-shaped ring (22); A one-way structure (21) is sleeved on the movable C-shaped ring (22) and is arranged inside the large tooth portion (3); The fixed C-shaped ring (23) is relatively fixed to the large tooth portion (3).

2. A two-way clutch gear set with torque difference according to claim 1, characterized in that: The one-way structure (21) comprises a one-way bearing.

3. A two-way clutch gear set with torque difference according to claim 2, characterized in that: The small tooth portion (1) comprises: Pinion (11); A gear rod (13) is connected to the pinion gear (11).

4. A two-way clutch gear set with torque difference according to claim 3, characterized in that: The movable C-shaped ring (22) and the fixed C-shaped ring (23) are sleeved on the gear rod (13).

5. A two-way clutch gear set with torque difference according to claim 2, characterized in that: The large tooth portion (3) comprises: Large gear (32); The accommodating groove (31) is connected to the large gear (32).

6. A two-way clutch gear set with torque difference according to claim 5, characterized in that: The axis of the large gear (32) has an opening, the opening is matched with the fixed C-shaped ring (23), and a limiting protrusion (321) matched with the notch of the fixed C-shaped ring (23) is provided in the opening.

7. A two-way clutch gear set with torque difference according to claim 5, characterized in that: The one-way bearing is arranged in the accommodating groove (31), and the outer wall and the accommodating groove (31) are relatively fixed.

Images