Transmission mechanism and middle transmission

Abstract

The utility model relates to the technical field of transmissions, and provides a transmission mechanism and a middle transmission. The utility model provides a transmission mechanism which comprises a main shaft, a one-way clutch assembly, an input piece, an output piece and a transmission piece. The output part comprises a clutch part and an output part which are connected with each other, the transmission part comprises a fixed part and a transmission part which are connected with each other, the clutch part and the output part are arranged on the main shaft in a sleeving manner, the fixed part is fixedly mounted on the main shaft, and the transmission part is arranged on the clutch part in a sleeving manner; the one-way clutch assembly is used for controlling locking and separation of the clutch part and the main shaft; and the output part is used for rotating under the driving of the main shaft when the clutch part and the main shaft are locked, and is used for rotating under the driving of the input piece when the clutch part and the main shaft are separated. The transmission part of the transmission part is arranged on the clutch part of the output part in a sleeving manner, so that the occupied space of the output part can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmissions, in particular to a transmission mechanism and a mid-mounted transmission. Background Art

[0002] In a mid-mounted transmission, speed changes are achieved by altering the power transmission path by changing the output member's drive mode. This typically requires the output member to interact with a one-way clutch. For example, the one-way clutch can lock or disconnect the output member from the shaft, allowing the output member to rotate synchronously or asynchronously with the shaft. Consequently, a structure must be designed on the output member to interact with the one-way clutch. This increases the size of the output member within the compact mid-mounted transmission, further increasing the space it occupies. Utility Model Content

[0003] The purpose of the utility model is to provide a transmission mechanism and a mid-mounted transmission, aiming to solve the problem in the prior art that the output member occupies a large space.

[0004] In the first aspect, the present application provides a transmission mechanism, including a main shaft, a one-way clutch assembly, an input member, an output member and a transmission member; the output member includes a clutch part and an output part connected to each other, and the transmission member includes a fixed part and a transmission part connected to each other, the clutch part and the output part are both sleeved on the main shaft, the fixed part is fixedly installed on the main shaft, and the transmission part is sleeved on the clutch part; the one-way clutch assembly is used to control the locking and separation of the clutch part and the main shaft; the output part is used to rotate under the drive of the main shaft when the clutch part and the main shaft are locked, and is used to rotate under the drive of the input member when the clutch part and the main shaft are separated.

[0005] In one embodiment, the one-way clutch assembly is installed inside the transmission part and sleeved on the clutch part, and is used to control the locking and separation of the outer side of the clutch part and the main shaft.

[0006] In one embodiment, the one-way clutch assembly includes a retaining frame, a roller and an elastic member. The retaining frame is installed on the inner side of the transmission part and is sleeved on the clutch part. A plurality of receiving grooves are formed between the retaining frame and the clutch part. The roller is located in the receiving groove. The two ends of the elastic member are respectively connected to the clutch part and the retaining frame.

[0007] In one embodiment, the one-way clutch assembly is mounted on the main shaft, the clutch portion is sleeved on the one-way clutch assembly, and the one-way clutch assembly is used to control the locking and separation of the inner side of the clutch portion and the main shaft.

[0008] In one embodiment, the transmission mechanism further comprises a bearing member rotatably mounted on the main shaft in the circumferential direction, and the output portion is sleeved on the bearing member.

[0009] In one embodiment, the output portion includes a gear structure, the input member is an input gear, and the gear structure is engaged with the input gear.

[0010] In one embodiment, the output portion further includes a mounting structure connected to the gear structure, and the mounting structure is used to mount a crankset.

[0011] In one embodiment, the transmission mechanism further includes a secondary shaft parallel to the main shaft, and the input gear is fixedly mounted on the secondary shaft for rotating under the drive of the secondary shaft.

[0012] In one embodiment, the transmission member is a first gear, and the transmission mechanism further includes a second gear mounted on the secondary shaft, the second gear meshing with the first gear, and the first gear is configured to rotate under the drive of the main shaft when the clutch portion and the main shaft are separated, thereby driving the secondary shaft to rotate through the second gear, and causing the input gear to rotate under the drive of the secondary shaft.

[0013] In a second aspect, the present application provides a mid-mounted transmission, comprising the transmission mechanism described in the first aspect above.

[0014] The transmission mechanism provided by the present invention has the following beneficial effects: an output member is sleeved on a main shaft and includes a clutch portion and an output portion connected to each other. The clutch portion cooperates with a one-way clutch assembly to lock and separate the main shaft and the output member, allowing the output member to rotate under the drive of the main shaft or the input member. A transmission member is also fixedly mounted on the main shaft. By sleevedly mounting the transmission portion of the transmission member on the clutch portion of the output member, the space occupied by the output member can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 A schematic diagram of a transmission mechanism provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic diagram of the assembly of the main shaft provided in an embodiment of the present utility model;

[0018] Figure 3An exploded view of the transmission member, one-way clutch assembly, and output member provided in an embodiment of the present utility model;

[0019] Figure 4 A cross-sectional view of a one-way clutch assembly at a transmission member provided in an embodiment of the present utility model.

[0020] Among them, the reference numerals in the figures are:

[0021] 10. Main shaft; 20. One-way clutch assembly; 21. Retaining frame; 22. Roller; 23. Accommodating groove; 24. Elastic member; 30. Input member; 40. Output member; 41. Clutch part; 411. Groove; 42. Output part; 421. Gear structure; 422. Mounting structure; 50. Transmission member; 51. Fixing part; 52. Transmission part; 60. Fixing part; 70. Countershaft; 80. Second gear. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0026] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] Please refer to Figures 1 to 4 Now, the transmission mechanism in the embodiment of the present utility model is described.

[0028] The transmission mechanism provided by the embodiment of the present invention is applied to a mid-mounted transmission. The transmission mechanism in the embodiment of the present invention includes a main shaft 10, a one-way clutch assembly 20, an input member 30, an output member 40, and a transmission member 50; the output member 40 includes a clutch portion 41 and an output portion 42 connected to each other, and the transmission member 50 includes a fixed portion 51 and a transmission portion 52 connected to each other, the clutch portion 41 and the output portion 42 are both sleeved on the main shaft 10, the fixed portion 51 is fixedly mounted on the main shaft 10, and the transmission portion 52 is sleeved on the clutch portion 41; the one-way clutch assembly 20 is used to control the locking and separation of the clutch portion 41 and the main shaft 10. When the clutch portion 41 and the main shaft 10 are locked, the output member 40 and the main shaft 10 rotate synchronously, and when the clutch portion 41 and the main shaft 10 are separated, the output member 40 and the main shaft rotate asynchronously. The output portion 42 is driven to rotate by the spindle 10 when the clutch portion 41 and the spindle 10 are locked, and is driven to rotate by the input member 30 when the clutch portion 41 and the spindle 10 are separated. By sleeve-fitting the transmission portion 52 of the transmission member 50 outside the clutch portion 41, the space occupied by the clutch portion 41 on the spindle can be reduced, thereby reducing the space occupied by the output member 40 on the spindle, and further shortening the size of the spindle 10.

[0029] The one-way clutch assembly 20 may be an internal gear one-way clutch, an external gear one-way clutch, or a roller one-way clutch.

[0030] In one embodiment, the one-way clutch assembly 20 is mounted inside the transmission portion 52 and sleeved onto the clutch portion 41, controlling the locking and disengagement of the outer side of the clutch portion 41 and the main shaft 10. Since the transmission portion 52 is fixed to the main shaft 10 via the fixing portion 51, controlling the locking and disengagement of the outer side of the clutch portion 41 and the inner side of the transmission portion 52 through the one-way clutch assembly 20 can correspondingly control the locking and disengagement of the output member 40 and the main shaft 10. Furthermore, by locating the one-way clutch assembly 20 outside the clutch portion 41, the size of the one-way clutch assembly 20 can be increased, thereby enhancing the strength and rigidity of the one-way clutch assembly 20 and improving the structural stability of the transmission mechanism.

[0031] In one embodiment, the one-way clutch assembly 20 includes a retainer 21, rollers 22, and an elastic member 24. The retainer 21 is mounted inside the transmission portion 52 and sleeved onto the clutch portion 41. A plurality of receiving grooves 23 are formed between the retainer 21 and the clutch portion 41. The rollers 22 are positioned within the receiving grooves 23. The ends of the elastic member 24 are respectively connected to the clutch portion 41 and the retainer 21. The clutch portion 41 is provided with a plurality of grooves 411 on its outer side, each of which forms a receiving groove 23 between the retainer 21 and the retainer 21. When the input member 30 rotates, the output member 40 rotates at a speed greater than that of the main shaft 10, and the transmission member 50 rotates synchronously with the main shaft 10. Consequently, the clutch portion 41 rotates at a speed greater than that of the transmission member 50. Consequently, driven by friction, the rollers 22 push the retainer 21 and the clutch portion 41 toward each other, stretching the elastic member 24. This causes the rollers 22 to move toward the grooves 411, increasing the distance between the clutch portion 41 and the retainer 21. This separates the output member 40 from the transmission member 50, and thus from the main shaft 10, allowing the output member 40 to rotate under the drive of the input member 30. When the speed of the input member 30 decreases, the speed of the output member 40 also decreases, causing the speeds of the retainer 21 and the clutch portion 41 to gradually approach each other until they become equal. At this time, the elastic member 24 pulls the retaining frame 21 to push the roller 22 out of the groove 411, so that the clutch part 41 and the transmission member 50 are combined into a whole through the roller 22, thereby locking the output member 40 and the transmission member 50, that is, locking the output member 40 and the main shaft 10, and then causing the output member 40 to rotate under the drive of the main shaft 10.

[0032] In another embodiment, the one-way clutch assembly 20 is installed on the main shaft 10, and the clutch part 41 is sleeved on the one-way clutch assembly 20. The one-way clutch assembly 20 is used to control the locking and separation of the inner side of the clutch part 41 and the main shaft 10, thereby realizing the locking and separation of the output member 40 and the main shaft 10.

[0033] In one embodiment, the transmission mechanism further includes a bearing member 60 circumferentially rotatably mounted on the main shaft 10, and the output portion 42 is sleeved on the bearing member 60, thereby reducing the radial swing of the output member 40 and reducing the friction between the output member 40 and the main shaft 10, thereby improving the stability of the transmission mechanism.

[0034] In one embodiment, the output portion 42 includes a gear structure 421 , and the input member 30 is an input gear. The gear structure 421 meshes with the input gear, so that the input member 30 can drive the output member 40 to rotate through the gear drive, thereby improving the reliability of power transmission.

[0035] In one embodiment, the output portion 42 further includes a mounting structure 422 connected to the gear structure 421 . The mounting structure 422 is used to mount a chainring, so that the output member 40 can directly drive the chainring to rotate, providing power for the bicycle where the transmission mechanism is located.

[0036] In one embodiment, the transmission mechanism further includes a countershaft 70 parallel to the main shaft 10. The input gear is fixedly mounted on the countershaft 70 and is driven to rotate by the countershaft 70. Therefore, the output member 40 has two power input routes: one is input from the main shaft 10, and the other is input from the countershaft 70. This allows the output member 40 to achieve both variable speed output and non-variable speed output.

[0037] In one embodiment, the transmission member 30 is a first gear, and the transmission mechanism further includes a second gear 80 mounted on the countershaft 70. The second gear 80 meshes with the first gear. The first gear is configured to rotate under the drive of the main shaft 10 when the clutch portion 41 is disengaged from the main shaft 10. This, in turn, drives the countershaft 70 to rotate via the second gear 80, thereby causing the input gear to rotate under the drive of the countershaft 70. Therefore, by simply driving the main shaft 10 to rotate, at least two power transmission lines can be formed through different gear transmissions to achieve speed change, reducing the overall complexity of the transmission mechanism.

[0038] Another embodiment of the present application provides a mid-mounted transmission, comprising the above-mentioned transmission mechanism.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A transmission mechanism, characterized in that: The one-way clutch assembly comprises a main shaft, a one-way clutch assembly, an input member, an output member, and a transmission member; the output member comprises a clutch portion and an output member connected to each other, the transmission member comprises a fixed portion and a transmission member connected to each other, the clutch portion and the output member are both sleeved on the main shaft, the fixed portion is fixedly mounted on the main shaft, and the transmission member is sleeved on the clutch portion; the one-way clutch assembly is used to control the locking and separation of the clutch portion and the main shaft; The output portion is configured to rotate under the drive of the main shaft when the clutch portion and the main shaft are locked, and is configured to rotate under the drive of the input member when the clutch portion and the main shaft are separated.

2. The transmission mechanism according to claim 1, characterized in that: The one-way clutch assembly is installed on the inner side of the transmission part and is sleeved on the clutch part, and is used to control the locking and separation of the outer side of the clutch part and the main shaft.

3. The transmission mechanism according to claim 2, characterized in that: The one-way clutch assembly includes a retaining frame, a roller and an elastic member. The retaining frame is installed on the inner side of the transmission part and is sleeved on the clutch part. A plurality of receiving grooves are formed between the retaining frame and the clutch part. The roller is located in the receiving grooves. The two ends of the elastic member are respectively connected to the clutch part and the retaining frame.

4. The transmission mechanism according to claim 1, characterized in that: The one-way clutch assembly is mounted on the main shaft, the clutch portion is sleeved on the one-way clutch assembly, and the one-way clutch assembly is used to control the locking and separation of the inner side of the clutch portion and the main shaft.

5. The transmission mechanism according to claim 1, characterized in that: The transmission mechanism further comprises a bearing component rotatably mounted on the main shaft in the circumferential direction, and the output portion is sleeved on the bearing component.

6. The transmission mechanism according to claim 1, characterized in that: The output portion includes a gear structure, the input member is an input gear, and the gear structure is meshed with the input gear.

7. The transmission mechanism according to claim 6, characterized in that: The output portion further includes a mounting structure connected to the gear structure, and the mounting structure is used for mounting a crankset.

8. The transmission mechanism according to claim 6, characterized in that: The transmission mechanism further includes a secondary shaft parallel to the main shaft, and the input gear is fixedly mounted on the secondary shaft for rotating under the drive of the secondary shaft.

9. The transmission mechanism according to claim 8, characterized in that: The transmission member is a first gear, and the transmission mechanism also includes a second gear mounted on the secondary shaft, the second gear meshing with the first gear, and the first gear is used to rotate under the drive of the main shaft when the clutch part and the main shaft are separated, thereby driving the secondary shaft to rotate through the second gear, so that the input gear rotates under the drive of the secondary shaft.

10. A mid-mounted transmission, characterized in that: Comprising the transmission mechanism according to any one of claims 1 to 9.

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