Elastic ratchet wheel structure and flywheel

Abstract

The utility model relates to an elastic ratchet wheel structure and a flywheel, the elastic ratchet wheel structure is matched with a tower footing, the elastic ratchet wheel structure comprises a flywheel body, the flywheel body is axially through, the inner wall of the flywheel body is provided with an annular step, and the annular step divides the inner cavity of the flywheel body into a first chamber and a second chamber; the sealing cover is arranged in the first cavity; the first gear ring is axially and movably assembled in the second cavity, an elastic piece is arranged between the first gear ring and the annular step, and a plurality of first ratchet parts are distributed on the other side of the first gear ring in an annular array mode; the flywheel shaft is assembled on the tower footing, the flywheel shaft is assembled from the second cavity, sequentially penetrates through the first gear ring, the elastic piece and the annular step and extends into the first cavity to be assembled with the sealing cover in a threaded mode, a second gear ring is axially arranged on the flywheel shaft, and a plurality of second ratchet parts meshed with the first gear ring in a one-way mode are distributed on the second gear ring in an annular array mode. According to the utility model, the transmittable torque is optimized and increased, and the abrasion is greatly minimized.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle transmission components, specifically to an elastic ratchet structure and a flywheel. Background Technology

[0002] In the drive design of a vehicle, a flywheel mechanism is installed on the hub of the drive wheel. This flywheel mechanism can transmit the driving force of the drive unit or flywheel body from the flywheel body to the hub, thereby driving the hub to rotate. The drive unit or flywheel body will idle during reverse drive and when stationary, that is, the hub and flywheel body can rotate in opposite directions.

[0003] In existing technologies, the internal structure of a flywheel mechanism generally includes two nested annular gear discs and several movable ratchet teeth located on the edge of the inner annular gear disc. The ratchet teeth are unidirectionally coupled to an interface on the inner wall of the outer gear disc. When rotating relative to the outer gear disc in the direction of rotation, the ratchet teeth engage the interface to transmit torque through form-fitting. However, in the above-mentioned technical solutions, the ratchet transmission method relies on only a small number of ratchet teeth to achieve torque transmission, resulting in a small transmittable torque and susceptibility to wear and deformation under long-term stress. Therefore, we propose an elastic ratchet structure and flywheel. Utility Model Content

[0004] This application provides an elastic ratchet structure and flywheel to at least solve the problem that the ratchet transmission method of the flywheel mechanism in the prior art relies on only a small number of ratches to achieve torque transmission, resulting in small transmittable torque and easy wear and deformation under long-term stress.

[0005] In a first aspect, this application provides a resilient ratchet structure, which is coupled with a base, including:

[0006] The flywheel body has an axially continuous structure and an annular step on its inner wall, which divides the inner cavity of the flywheel body into a first chamber and a second chamber.

[0007] A sealing cap is disposed within the first chamber;

[0008] The first gear ring is axially movably assembled in the second cavity, and an elastic element is provided between it and the annular step. Several first ratchet portions are distributed in an annular array on the other side of the first gear ring.

[0009] The flywheel shaft is mounted on the tower base. It is installed into the second chamber, passes through the first gear ring, the elastic element and the annular step in sequence and extends into the first chamber to be threadedly assembled with the sealing cover. The flywheel shaft is axially provided with a second gear ring, and the second gear ring is provided with a number of second ratchet portions that mesh unidirectionally with the first gear ring in an annular array.

[0010] Optionally, both the first chamber and the second chamber are provided with bearing components located between the flywheel body and the flywheel shaft.

[0011] Optionally, the bearing component includes a first bearing component and a second bearing component;

[0012] The first bearing component is disposed in the first cavity and abuts against the sealing cover and the annular step, respectively;

[0013] The second bearing component is disposed in the second cavity and abuts against the flywheel shaft and the assembly step formed on the inner wall of the second cavity, respectively.

[0014] Optionally, the second gear ring is integrally formed on the annular outer wall surface of the flywheel shaft.

[0015] Optionally, the inner wall of the flywheel shaft is provided with a second mounting key that is axially fitted with the tower base to limit rotation.

[0016] Optionally, the outer wall of the flywheel body is provided with a first assembly key for axial assembly of the flywheel disc body to limit rotation.

[0017] Optionally, the elastic element is an annular wave spring or a compression spring.

[0018] Secondly, this application provides a flywheel including the elastic ratchet structure described in the first aspect above.

[0019] Compared with related technologies, the flexible ratchet structure and flywheel provided in this application have at least the following technical advantages:

[0020] By setting a first gear ring and a second gear ring between the flywheel body and the flywheel shaft, combined with the elastic push of the elastic element, the meshing part of the first gear ring and the second gear ring is engaged only when the flywheel shaft is driven in one direction, so that the wheel moves forward. When the flywheel shaft is stationary and when the flywheel shaft rotates in the opposite direction, the engagement is disengaged, thereby preventing friction and wear from occurring at the meshing part of the first gear ring and the second gear ring. In this way, the transmittable torque is optimized and increased while wear is greatly minimized.

[0021] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a perspective view of a flywheel with a resilient ratchet structure, according to an exemplary embodiment.

[0024] Figure 2 This is one of the exploded views of a flywheel with a resilient ratchet structure shown according to an exemplary embodiment.

[0025] Figure 3 This is the second exploded view of a flywheel with an elastic ratchet structure, according to an exemplary embodiment.

[0026] Figure 4 This is a cross-sectional view of a flywheel with a resilient ratchet structure, according to an exemplary embodiment.

[0027] Explanation of reference numerals in the attached figures:

[0028] Flywheel body 10; Annular step 101; First chamber 102; Second chamber 103; First assembly key 104;

[0029] Elastic element 20; First toothed ring 30; First ratchet portion 301;

[0030] Flywheel shaft 40; shaft body 401; external threaded part 402; second gear ring 403; second ratchet part 4031; second mounting key 404;

[0031] First bearing component 501; second bearing component 502; sealing cover 60. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In existing technologies, the internal structure of a flywheel mechanism typically includes two nested annular gear discs and several movable ratchet teeth located on the edge of the inner annular gear disc. The ratchet teeth unidirectionally couple to an interface on the inner wall of the outer gear disc. When rotating relative to the outer gear disc in the direction of rotation, the ratchet teeth engage the interface to transmit torque through form-fitting. However, in the aforementioned technical solutions, the ratchet transmission method relies solely on the movable ratchet teeth to transmit torque, resulting in a small transmittable torque that is prone to wear and deformation under long-term stress.

[0036] Based on the above, this utility model provides an elastic ratchet structure and a flywheel, which will be described in detail below with reference to specific embodiments and accompanying drawings.

[0037] Example 1

[0038] This utility model embodiment provides an elastic ratchet structure. Figure 1 This is a perspective view of a flywheel with a resilient ratchet structure, according to an exemplary embodiment. Figure 2 This is one of the exploded views of a flywheel with a resilient ratchet structure shown according to an exemplary embodiment. Figure 3 This is the second exploded view of a flywheel with an elastic ratchet structure, according to an exemplary embodiment. Figure 4 This is a cross-sectional view of a flywheel with a resilient ratchet structure, illustrated according to an exemplary embodiment. Figures 1-4 As shown, the flexible ratchet structure is equipped with a freewheel base, which rotates synchronously with the vehicle's wheels, including:

[0039] The flywheel body 10 is axially continuous and has an annular step 101 on its inner wall. The annular step 101 divides the inner cavity of the flywheel body 10 into a first chamber 102 and a second chamber 103.

[0040] A sealing cover 60 is disposed within the first chamber 102;

[0041] The first toothed ring 30 is axially movably assembled in the second chamber 103, and an elastic element 20 is provided between it and the annular step 101. A plurality of first ratchet portions 301 are distributed in annular array on the other side of the first toothed ring 30. Optionally, the elastic element 20 is an annular wave spring or a compression spring. In this embodiment, the elastic element 20 is described using an annular wave spring as an example.

[0042] The flywheel shaft 40, which is mounted on the base, includes a shaft body 401. The shaft body 401 has a two-section boss structure, with the diameter of the first section being smaller than that of the second section, thus forming a step at the connection. This step is used to machine and form the second gear ring 403, that is, the second gear ring 403 is integrally formed on the annular outer wall surface of the flywheel shaft 40. The second gear ring 403 has several second ratchet portions 4031 that mesh unidirectionally with the first gear ring 30 in an annular array. The free end of the first section of the flywheel shaft 40 is provided with an external thread portion 402, which is assembled from the second chamber 103, passes through the first gear ring 30, the elastic element 20 and the annular step 101 in sequence and extends into the first chamber 102. Subsequently, a sealing cap 60 is installed from the opening end of the first chamber 102. The sealing cap 60 is threadedly assembled with the external thread portion 402 of the first section of the flywheel shaft 40, thus completing the assembly.

[0043] In the above embodiment, the annular wave spring plate 20 and the first gear ring 30 are sequentially axially sleeved on the first section of the flywheel shaft 40, and assembled from the second chamber 103. After reaching the first chamber 102, the sealing cover 60 is threaded on. In this embodiment, the outer contour of the first gear ring 30 is polygonal. After assembly, it enters the polygonal cavity formed on the inner wall of the second chamber 103, thereby restricting rotation and allowing axial movement. Further optionally, the first gear ring 30 can also achieve axial movement and restrict rotation in the second chamber 103 through a structural connection method such as keyway fit. The first ratchet portion 301 of the first gear ring 30 meshes with the second ratchet portion 4031 of the second gear ring 403 under the elastic push of the annular wave spring plate 20, thereby achieving the purpose of restricting unidirectional meshing. Figure 2For example, when the vehicle tires are spinning freely, the flywheel shaft 40 rotates counterclockwise synchronously with the vehicle tires. The first ratchet 301 and the second ratchet 4031 do not engage, and the first gear ring 30 presses against the annular wave spring 20 to elastically retract, thus not driving the flywheel body 10 to rotate. However, when the flywheel body 10 is driven clockwise, the first ratchet 301 and the second ratchet 4031 engage, driving the flywheel shaft 40 and the vehicle tires to rotate synchronously, thus driving the vehicle forward. That is, the meshing part of the first gear ring 30 and the second gear ring 403 is only engaged when the flywheel shaft 40 is driven clockwise, thereby moving the wheel forward. When the flywheel shaft 40 is stationary and when the flywheel shaft 40 rotates counterclockwise, the engagement is disengaged, thereby preventing friction and wear from occurring at the meshing part of the first gear ring 30 and the second gear ring 403.

[0044] Continue to refer to the appendix Figure 4 In this embodiment, bearing components are provided in both the first chamber 102 and the second chamber 103, located between the flywheel body 10 and the flywheel shaft 40. Specifically, in this embodiment, the bearing components include a first bearing component 501 and a second bearing component 502. The first bearing component 501 is disposed in the first chamber 102 and abuts against the sealing cover 60 and the annular step 101, respectively. The second bearing component 502 is disposed in the second chamber 103 and abuts against the flywheel shaft 40 and the assembly step formed on the inner wall of the second chamber 103, respectively.

[0045] In the above embodiment, during assembly, the first bearing 501 is axially sleeved on the second section of the flywheel shaft 40, and then the annular wave spring 20 and the first gear ring 30 are axially sleeved on the first section of the flywheel shaft 40 in sequence, and assembled from the second chamber 103 to the first chamber 102. Subsequently, the second bearing 502 is installed from the opening end of the first chamber 102 and the sealing cover 60 is threaded on to complete the assembly. The arrangement of the first bearing 501 and the second bearing 502 can maintain the unidirectional rotation between the flywheel body 10 and the flywheel shaft 40, reduce friction, better transmit power, and drive the wheel to rotate.

[0046] In this embodiment, please continue to refer to Appendix Figure 1-4 The inner wall of the flywheel shaft 40 is provided with a second assembly key 404 for axial assembly with the tower base to limit rotation; the outer wall of the flywheel body 10 is provided with a first assembly key 104 for axial assembly with the flywheel disc body to limit rotation, which is compatible with the existing tower base and flywheel disc body structure.

[0047] In summary, the elastic ratchet structure provided in this embodiment of the present invention, through the arrangement of the first gear ring 30 and the second gear ring 403 between the flywheel body 10 and the flywheel shaft 40, combined with the elastic push of the elastic member 20, ensures that the meshing part of the first gear ring 30 and the second gear ring 403 is engaged only when the flywheel shaft 40 is driven in one direction, thereby causing the wheel to move forward. When the flywheel shaft 40 is stationary or when the flywheel shaft 40 rotates in the opposite direction, the engagement is disengaged, thereby preventing friction and wear at the meshing part of the first gear ring 30 and the second gear ring 403. In this way, the transmittable torque is optimized and increased while wear is significantly minimized.

[0048] Example 2

[0049] Embodiment 2 of this utility model provides a flywheel, which includes the elastic ratchet structure provided in Embodiment 1 above.

[0050] Other undescribed structures are described in Example 1.

[0051] In summary, the elastic ratchet structure and flywheel provided in this embodiment of the present invention, through the arrangement of the first gear ring 30 and the second gear ring 403 between the flywheel body 10 and the flywheel shaft 40, combined with the elastic push of the elastic element 20, ensures that the meshing part of the first gear ring 30 and the second gear ring 403 is engaged only when the flywheel shaft 40 is driven in one direction, thereby causing the wheel to move forward. When the flywheel shaft 40 is stationary or when the flywheel shaft 40 rotates in the opposite direction, the engagement is disengaged, thereby preventing friction and wear at the meshing part of the first gear ring 30 and the second gear ring 403. In this way, the transmittable torque is optimized and increased while wear is significantly minimized.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A resilient ratchet structure, wherein a base is provided, characterized in that, include: The flywheel body has an axially continuous structure and an annular step on its inner wall, which divides the inner cavity of the flywheel body into a first chamber and a second chamber. A sealing cap is disposed within the first chamber; The first gear ring is axially movably assembled in the second cavity, and an elastic element is provided between it and the annular step. Several first ratchet portions are distributed in an annular array on the other side of the first gear ring. The flywheel shaft is mounted on the tower base. It is installed into the second chamber, passes through the first gear ring, the elastic element and the annular step in sequence and extends into the first chamber to be threadedly assembled with the sealing cover. The flywheel shaft is axially provided with a second gear ring, and the second gear ring is provided with a number of second ratchet portions that mesh unidirectionally with the first gear ring in an annular array.

2. The elastic ratchet structure as described in claim 1, characterized in that, Both the first chamber and the second chamber are provided with bearing components located between the flywheel body and the flywheel shaft.

3. The elastic ratchet structure as described in claim 2, characterized in that, The bearing component includes a first bearing component and a second bearing component; The first bearing component is disposed in the first cavity and abuts against the sealing cover and the annular step, respectively; The second bearing component is disposed in the second cavity and abuts against the flywheel shaft and the assembly step formed on the inner wall of the second cavity, respectively.

4. The elastic ratchet structure as described in claim 1, characterized in that, The second gear ring is integrally formed on the annular outer wall surface of the flywheel shaft.

5. The elastic ratchet structure as described in claim 1, characterized in that, The inner wall of the flywheel shaft is provided with a second assembly key that is axially fitted to the tower base to limit rotation.

6. The elastic ratchet structure as described in claim 1, characterized in that, The outer wall of the flywheel body is provided with a first assembly key for axial assembly of the flywheel disc body to limit rotation.

7. The elastic ratchet structure as described in claim 1, characterized in that, The elastic element is a ring-shaped wave spring or a compression spring.

8. A flywheel, characterized in that, It includes the elastic ratchet structure described in any one of claims 1-7.

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