An inner ring clutch assembly

Abstract

The utility model belongs to clutch technical field especially is a kind of inner tooth ring clutch assembly, including inner ring and outer ring, the outer ring is fixed with gear ring, the outer ring circumference and the inner ring inner circumference are provided with the circumference arrangement several rollers and are pasted with inner ring by spring, the roller outside is pasted with the inner side of outer ring by spring, the roller is formed with endpoint a and area b, area c in outer ring one side close, the endpoint a with the other end maximum length of roller and the clearance distance between inner ring, outer ring are equal, the area b with the other end maximum length of roller is less than the clearance distance between inner ring, outer ring, the area c with the other end maximum length of roller is greater than the clearance distance between inner ring, outer ring;The clutch of the utility model is integrated structure, can be connected into an organic whole, after assembly forming, it can be directly used in transmission system, removes traditional ball, spring assembly step, use more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of clutch technology, specifically relating to an internal gear ring clutch assembly. Background Technology

[0002] In electric bicycles driven by hub motors, the clutch is a key transmission and control component integrated within the motor. Its main function is to achieve intelligent coupling and disengagement between the motor's power output and the wheels. This device typically employs a centrifugal clutch mechanism. When the motor is powered on and reaches a certain speed, the centrifugal slider inside the clutch overcomes spring resistance and moves outward under centrifugal force, engaging with the inner wall of the outer casing. This smoothly transmits the motor's rotational torque to the wheel hub, driving the vehicle forward. When the motor stops supplying power or the speed drops below a threshold, the centrifugal force weakens, the slider retracts under the action of the return spring, automatically disconnecting the power connection and allowing the wheels to enter a free-slipping state. However, existing clutches still have the following drawbacks.

[0003] 1. The clutch is a split structure, and during use, it is necessary to manually install balls and springs at the engagement and disengagement points of the inner and outer rings for engagement, which is not very convenient to operate.

[0004] 2. Because it is a spring-ball engagement structure, the spring needs to be set with multiple balls along the circumference, which results in high damping at the clutch, leading to greater wear and increased kinetic energy loss.

[0005] To address the aforementioned problems, this application proposes an internal gear ring clutch assembly. Utility Model Content

[0006] To address the aforementioned problems in the existing technology, this utility model provides an internal gear ring clutch assembly, which features integrated assembly and low damping.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an internal gear ring clutch assembly, comprising an inner ring and an outer ring, wherein a gear ring is fixed on the outer ring, and a plurality of circumferentially arranged rollers are disposed between the outer circumference of the outer ring and the inner circumference of the inner ring and are in contact with the inner ring by springs. The outer side of the rollers is in contact with the inner side of the outer ring by springs. The rollers near the outer ring have an end point a, a region b, and a region c. The maximum length of the roller end a and the other end of the roller is equal to the gap distance between the inner and outer rings. The maximum length of the roller end b and the other end of the roller is less than the gap distance between the inner and outer rings. The maximum length of the roller end c and the other end of the roller is greater than the gap distance between the inner and outer rings. When the outer ring actively rotates towards region c, it cannot drive the inner ring to rotate synchronously. After reversing, it can drive the inner ring to rotate synchronously. When the inner ring is active, it can drive the outer ring to rotate synchronously in both directions.

[0008] As a preferred embodiment of this invention, the roller is cylindrical and makes line contact with both the inner and outer rings.

[0009] As a preferred embodiment of this utility model, an outer retaining ring is formed on one side of the inner ring, and an inner retaining ring is formed on one side of the outer ring. The outer retaining ring and the inner retaining ring respectively abut against the planes at both ends of the roller.

[0010] As a preferred technical solution of this utility model, the inner ring has a toothed pattern on the side away from the outer retaining ring, and a locking piece is engaged in the toothed pattern. The other end of the locking piece also overlaps with the end of the inner retaining ring away from the roller.

[0011] As a preferred embodiment of this utility model, the locking piece is located on the inner side where the inner and outer rings connect.

[0012] As a preferred technical solution of this utility model, the outer circumference of the inner ring is provided with a plurality of connecting members that are fixed to the spring, and the connecting members are in tangential contact with the outside of the outer retaining ring.

[0013] As a preferred technical solution of this utility model, the roller is provided with a groove and is elastically tightened inward by a spring.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The clutch of this utility model is an integrated structure that can be connected to each other to form a whole. After assembly, it can be directly used in the transmission system, eliminating the need for traditional ball and spring assembly steps, making it more convenient to use. In this invention, the inner ring, outer ring, and rollers are connected by an outer retaining ring, an inner retaining ring, as well as threads and locking pieces, making overall assembly simpler and ensuring structural stability. The clutch structure inside this invention is implemented using rollers. The resistance formed by the rollers and springs is small, thus reducing kinetic energy loss. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Rear view structural diagram; Figure 3 This is a rear view structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the structure of the present invention from the front view. Figure 5This is a top view, half-section, and partially enlarged structural schematic diagram of the present invention; Figure 6 This is a partial cross-sectional view of the structure of this utility model. Figure 7 This is a magnified schematic diagram of a single roller in half section. In the diagram: 1. Inner ring; 11. Outer retaining ring; 12. Toothed thread; 2. Outer ring; 21. Inner retaining ring; 3. Gear ring; 4. Roller; 41. Countersunk groove; 5. Locking plate; 6. Connecting piece; 7. Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0017] Please see Figures 1-7 This utility model provides the following technical solution: an internal gear ring clutch assembly, including an inner ring 1 and an outer ring 2, a gear ring 3 fixed on the outer ring 2, a plurality of circumferentially arranged rollers 4 are arranged between the outer circumference of the outer ring 2 and the inner circumference of the inner ring 1 and are in contact with the inner ring 1 through springs 7, the outer side of the rollers 4 is in contact with the inner side of the outer ring 2 through springs 7, the rollers 4 have an end point a and regions b and c formed on the side near the outer ring 2, the maximum length of the end point a and the other end of the roller 4 is equal to the gap distance between the inner ring 1 and the outer ring 2, the maximum length of region b and the other end of the roller 4 is less than the gap distance between the inner ring 1 and the outer ring 2, and the maximum length of region c and the other end of the roller 4 is greater than the gap distance between the inner ring 1 and the outer ring 2. When the outer ring 2 rotates actively towards region c, it cannot drive the inner ring 1 to rotate synchronously, but after reversing, it can drive the inner ring 1 to rotate synchronously; when the inner ring 1 is active, it can drive the outer ring 2 to rotate synchronously in both directions. In actual use, the inner ring 1 is connected to the output end and rotates clockwise. The clockwise rotation of the inner ring 1 can drive the outer ring 2 and the gear ring 3 to rotate synchronously. When the inner ring 1 does not rotate, the outer ring 2 will continue to rotate clockwise due to inertia. After the inner ring 1 provides power again, it can only continue to drive the outer ring 2 to rotate when the speed is greater than that of the outer ring 2, thereby realizing the clutch effect of power transmission.

[0018] Furthermore, the roller 4 is cylindrical and has line contact with both the inner ring 1 and the outer ring 2. In this embodiment, the line contact ensures connection stability, guarantees the structural stability between the inner ring 1, the outer ring 2, and the roller 4, avoids swaying, and reduces vibration. Furthermore, the length of roller 4 can be adjusted according to actual usage needs, taking into account both size and stability.

[0019] Furthermore, an outer retaining ring 11 is formed on one side of the inner ring 1, and an inner retaining ring 21 is formed on one side of the outer ring 2. The outer retaining ring 11 and the inner retaining ring 21 respectively abut against the two end planes of the roller 4, and the outer retaining ring 11 and the inner retaining ring 21 block the roller 4, restrict the axial displacement of the roller 4, and ensure a stable connection between the inner ring 1 and the outer ring 2.

[0020] Furthermore, the inner ring 1 has a toothed pattern 12 formed on the side away from the outer retaining ring 11, and a locking piece 5 is engaged in the toothed pattern 12. The other end of the locking piece 5 also overlaps with the end of the inner retaining ring 21 away from the roller 4. In this embodiment, the locking piece 5 has an opening for connecting and disconnecting from the toothed pattern 12. The locking piece 5 only plays a positioning role between the inner ring 1 and the outer ring 2, and does not apply elastic force or extrusion force to them. Moreover, in order to reduce friction, lubricating oil can be applied to the connection between the locking piece 5 and the inner ring 1 and the outer ring 2, which greatly reduces the damping force between the inner ring 1 and the outer ring 2.

[0021] Furthermore, the locking piece 5 is located on the inner side where the inner ring 1 and the outer ring 2 are connected.

[0022] Furthermore, the outer circumference of the inner ring 1 is provided with several connecting parts 6 that are fixed to the spring 7. The connecting parts 6 are in tangential contact with the outer side of the outer retaining ring 11. In this embodiment, the outer side of the connecting parts 6 does not contact the inner side of the outer ring 2. The roller 4 and the connecting parts 6 are always in a tangential state that can be partially rolled with the outer side of the inner ring 1 under the action of the spring 7. The connecting parts 6 mainly play a connecting and supporting role for the spring 7.

[0023] Furthermore, such as Figure 7 As shown, the roller 4 has a groove 41 and is elastically tightened towards the inner ring 1 by the spring 7. The groove 41 can restrict the spring 7 from axial displacement. At the same time, the obtuse angle surface formed on the inner side can keep the end point a in contact with the inner side of the outer ring 2 under the action of the spring 7. In this state, both the inner ring 1 and the outer ring 2 are in a stationary state.

[0024] The working principle and usage process of this utility model: The spring 7 and the connecting piece 6 are fixedly connected and fitted onto the outside of the inner ring 1. All rollers 4 are arranged as follows: Figure 4 and Figure 6 The roller 4 is positioned on the outer periphery of the inner ring 1 and abuts against the outer retaining ring 11. The roller 4 is oriented and positioned by the spring 7. After assembly, the inner ring 1, roller 4 and inner retaining ring 21 on the outer ring 2 abut against each other. The locking piece 5 is opened from the inside of the outer ring 2 and inserted into the thread 12 to complete the assembly.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An internal gear ring clutch assembly, comprising an inner ring (1) and an outer ring (2), wherein a gear ring (3) is fixed on the outer ring (2), characterized in that: A plurality of circumferentially arranged rollers (4) are provided between the outer circumference of the outer ring (2) and the inner circumference of the inner ring (1) and are attached to the inner ring (1) by springs (7). The outer side of the rollers (4) is attached to the inner side of the outer ring (2) by springs (7). The rollers (4) have an end point a and regions b and c on the side near the outer ring (2). The maximum length of the end point a and the other end of the roller (4) is equal to the gap distance between the inner ring (1) and the outer ring (2). The maximum length of the region b and the other end of the roller (4) is less than the gap distance between the inner ring (1) and the outer ring (2). The maximum length of the region c and the other end of the roller (4) is greater than the gap distance between the inner ring (1) and the outer ring (2). When the outer ring (2) rotates actively to the side of region c, it cannot drive the inner ring (1) to rotate synchronously. After reversing, it can drive the inner ring (1) to rotate synchronously. When the inner ring (1) is active, it can drive the outer ring (2) to rotate synchronously in both directions.

2. The internal gear ring clutch assembly according to claim 1, characterized in that: The roller (4) is cylindrical and makes line contact with both the inner ring (1) and the outer ring (2).

3. The internal gear ring clutch assembly according to claim 1, characterized in that: An outer retaining ring (11) is formed on one side of the inner ring (1), and an inner retaining ring (21) is formed on one side of the outer ring (2). The outer retaining ring (11) and the inner retaining ring (21) respectively abut against the planes at both ends of the roller (4).

4. An internal gear ring clutch assembly according to claim 3, characterized in that: The inner ring (1) has a toothed pattern (12) on the side away from the outer retaining ring (11), and a locking piece (5) is engaged in the toothed pattern (12). The other end of the locking piece (5) is also connected to the end of the inner retaining ring (21) away from the roller (4).

5. An internal gear ring clutch assembly according to claim 4, characterized in that: The locking piece (5) is located on the inner side where the inner ring (1) and the outer ring (2) are connected.

6. An internal gear ring clutch assembly according to claim 1, characterized in that: The inner ring (1) is provided with several connecting parts (6) that are fixed to the spring (7) on its outer periphery. The connecting parts (6) are in tangential contact with the outside of the outer retaining ring (11).

7. An internal gear ring clutch assembly according to claim 1, characterized in that: The roller (4) has a groove (41) and is elastically tightened towards the inner ring (1) by the spring (7).

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