A drive assembly and a mid-mounted transmission

Abstract

This invention relates to the field of transmission technology, and provides a drive assembly and a mid-mounted transmission. The drive assembly provided by this invention includes a shift fork, a control component, and a connecting component. The control component includes a control shaft and a positioning component fixedly mounted on the control shaft. The connecting component is axially movably mounted on the control shaft, and the shift fork is fixedly mounted on the connecting component. The connecting component has protrusions and / or grooves. During rotation, the control shaft abuts against the protrusions and / or grooves through the positioning component to push the connecting component to move, thereby driving the shift fork to move axially. This reduces the axial movement distance of the control shaft, thereby reducing the axial movement distance of the drive assembly during the movement of the clutch, and thus reducing the size of the mid-mounted transmission.

Description

Technical Field

[0001] This invention relates to the field of transmission technology, and more particularly to a drive assembly and a mid-mounted transmission. Background Technology

[0002] In the field of bicycles or e-bikes, a mid-drive derailleur refers to a derailleur installed in the middle of the bicycle. In a mid-drive derailleur, different gears create different transmission paths (i.e., different gears correspond to different gears), thus achieving gear changes. To achieve these different gear transmissions, a drive assembly is needed to move the clutch, causing the clutch to engage and disengage between the gears and the shaft on which they are mounted. Existing drive assemblies involve a relatively large spatial movement distance when driving the clutch, resulting in a larger size for mid-drive derailleurs. Summary of the Invention

[0003] The purpose of this invention is to provide a drive assembly and a mid-mounted transmission, which aims to solve the technical problem in the prior art that the drive assembly moves a large distance in space during the movement of the drive clutch.

[0004] In a first aspect, this application provides a drive assembly, including a shift fork, a control element, and a connector; the control element includes a control shaft and a positioning element mounted on the control shaft; the connector is axially movably mounted on the control shaft, and the shift fork is mounted on the connector; the connector is provided with a protrusion and / or a groove, and the control shaft is used to abut against the protrusion and / or the groove through the positioning element during rotation to push the connector to move, thereby driving the shift fork to move axially.

[0005] In one embodiment, the connecting member includes a first shift fork ring, a second shift fork ring, and a third shift fork ring; the first shift fork ring, the second shift fork ring, and the third shift fork ring are all axially movably sleeved on the control shaft, and each has the protrusion and / or the groove; the first shift fork ring and the third shift fork ring are respectively located at both ends of the second shift fork ring, and the first shift fork ring and the third shift fork ring are connected; the shift fork is mounted on the second shift fork ring; the positioning member is used to push the first shift fork ring, the second shift fork ring, and the third shift fork ring to move in the same direction or in opposite directions by abutting against the protrusion and / or the groove.

[0006] In one embodiment, the first shift fork ring has a first protrusion, and the second shift fork ring has a second groove on one side. The positioning member is used to sequentially abut against the first protrusion and the second groove during the rotation of the control shaft to push the shift fork to move to one side from the initial position, and to sequentially leave the second groove and the first protrusion during the rotation of the control shaft to push the shift fork back to the initial position.

[0007] In one embodiment, the third shift fork ring is provided with a third protrusion, and the other side of the second shift fork ring is provided with a fourth groove. The positioning member is used to sequentially abut against the third protrusion and the fourth groove during the rotation of the control shaft to push the shift fork from the initial position to the other side, and to sequentially leave the fourth groove and the third protrusion during the rotation of the control shaft to push the shift fork back to the initial position.

[0008] In one embodiment, the positioning element includes a first positioning pin and a second positioning pin, the first positioning pin being located between the first shift fork ring and the second shift fork ring, and the second positioning pin being located between the second shift fork ring and the third shift fork ring.

[0009] In one embodiment, the drive assembly further includes an elastic member with its two ends respectively abutting against the connector and the fork. The elastic member is configured to be in a compressed state when the positioning member pushes the connector, thereby pushing the fork or the connector to move when it returns to a normal state.

[0010] In one embodiment, the connector further includes a connecting post, which passes through the shift fork and is connected at both ends to the first shift fork ring and the third shift fork ring, respectively.

[0011] In one embodiment, the elastic element includes a first elastic element and a second elastic element sleeved on the connecting post. The two ends of the first elastic element abut against one side of the first shift fork ring and the shift fork, respectively, and the two ends of the second elastic element abut against the other side of the third shift fork ring and the shift fork, respectively.

[0012] In one embodiment, there are two connecting posts, which are located on opposite sides of the control shaft.

[0013] In a second aspect, this application provides a mid-mounted transmission, including the drive assembly as described in the first aspect above.

[0014] The beneficial effects of the drive assembly and mid-mounted transmission provided by this invention are as follows: By setting a positioning member on the control shaft, the shift fork is fixedly mounted on the connecting member. The connecting member is axially movably mounted on the control shaft and has a protrusion or groove. During rotation, the control shaft pushes the protrusion or groove of the connecting member through the positioning member to move the connecting member, thereby driving the shift fork to move axially, and thus causing the shift fork to drive the clutch to move axially. Therefore, the shift fork can be driven to move axially by the circumferential movement of the control shaft, reducing the axial movement distance of the control shaft. This reduces the axial movement distance of the drive assembly during the movement of the clutch, thereby reducing the size of the mid-mounted transmission. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 A schematic diagram of a driving component provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the assembly of the drive assembly and the clutch provided in an embodiment of the present invention;

[0018] Figure 3 This is an assembly diagram of the connector and positioning component of the drive assembly provided in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the driving component provided in an embodiment of the present invention from another perspective.

[0020] The following are the labeling elements in the figure:

[0021] 10. Drive assembly; 11. Shift fork; 111. First mounting hole; 112. Second mounting hole; 12. Control component; 121. Control shaft; 122. Positioning component; 1221. First positioning pin; 1222. Second positioning pin; 13. Connecting component; 131. First shift fork ring; 1311. First protrusion; 1312. First groove; 132. Second shift fork ring; 1321. Second groove; 1322. Fourth groove; 133. Third shift fork ring; 1331. Third protrusion; 1332. Third groove; 134. Connecting post; 135. First washer; 136. Second washer; 14. Elastic component; 141. First elastic component; 142. Second elastic component; 20. Clutch; 30. Shaft; 40. Gear. Detailed Implementation

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

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

[0024] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Please refer to Figures 1 to 3 The driving components in the embodiments of the present invention will now be described.

[0028] The drive assembly 10 includes a shift fork 11, a control element 12, and a connector 13. The control element 12 includes a control shaft 121 and a positioning element 122 mounted on the control shaft 121. The connector 13 is axially movably mounted on the control shaft 121, and the shift fork 11 is mounted on the connector 13. The connector 13 has protrusions and / or grooves. During rotation, the control shaft 121 abuts against the protrusions and / or grooves of the connector 13 via the positioning element 122, thereby pushing the connector 13 to move and driving the shift fork 11 to move axially. The control shaft 12 is rotated under the drive of an external force, for example, by a gear or a chain. The axial direction is referenced to the axial direction of the control shaft 121.

[0029] Specifically, since the positioning member 122 is mounted on the control shaft 121, when the control shaft 121 rotates, the positioning member 122 moves circumferentially. As the positioning member 122 moves circumferentially, it abuts against the protrusions or grooves of the connecting member 13, thereby pushing the connecting member 13 to move in different axial directions, which in turn drives the shift fork 11 to move the clutch 20 axially. Therefore, by rotating the control shaft 121, the shift fork 11 can be pushed to move axially, reducing the axial movement distance of the control shaft 121. The shift fork 11 is mounted on the clutch 20 to drive the clutch 20 and the shift fork 11 to move synchronously, thereby engaging / disengaging the shaft 30 and the gear 40. Therefore, during the process of the shift fork 11 driving the clutch 20, the axial movement distance of the drive assembly 10 is reduced, thereby reducing the size of the mid-mounted transmission.

[0030] In one embodiment, the connecting member 13 includes a first shift fork ring 131, a second shift fork ring 132, and a third shift fork ring 133. The first shift fork ring 131, the second shift fork ring 132, and the third shift fork ring 133 are all axially movably sleeved on the control shaft 121, and each has a protrusion and / or a groove. The first shift fork ring 131 and the third shift fork ring 133 are located at opposite ends of the second shift fork ring 132, and are connected. The shift fork 11 is mounted on the second shift fork ring 132. The positioning member 122 is used to push the first shift fork ring 131, the second shift fork ring 132, and the third shift fork ring 133 to move in the same or opposite directions, thereby driving the shift fork 11 to move axially. In this configuration, the positioning element 122 pushes the protrusion or groove of the first shift fork ring 131, causing the first shift fork ring 131 to move; the positioning element 122 pushes the protrusion or groove of the second shift fork ring 132, causing the second shift fork ring 132 to move; and the positioning element 122 pushes the protrusion or groove of the third shift fork ring 133, causing the third shift fork ring 133 to move. For example, by designing the positions of the protrusions or grooves on the first shift fork ring 131, the second shift fork ring 132, and the third shift fork ring 133, the positioning element 122 can push the first shift fork ring 131 and the third shift fork ring 133 to move in the same direction, or the positioning element 122 can push the first shift fork ring 131 and the second shift fork ring 132 to move in opposite directions. By setting multiple shift fork rings, the requirements for the shift fork 11 to move in different directions and to move different distances can be met, thereby satisfying the requirements for multiple gears in a mid-mounted transmission.

[0031] In one embodiment, the first shift fork ring 131 has a first protrusion 1311, and the second shift fork ring 132 has a second groove 1321 on one side. The first protrusion 1311 and the second groove 1321 are arranged opposite to each other. The positioning member 122 is used to sequentially abut against the first protrusion 1311 and the second groove 1321 during the rotation of the control shaft 121 to push the shift fork 11 to move to one side from the initial position, and to sequentially leave the second groove 1321 and the first protrusion 1311 during the rotation of the control shaft 121 to push the shift fork 11 back to the initial position. Specifically, during the rotation of the control shaft 121 in the first direction (clockwise or counterclockwise), the positioning member 122 first abuts against the first protrusion 1311, thereby pushing the first shift fork ring 131 to move away from the second shift fork ring 132. Since the first shift fork ring 131 and the third shift fork ring 133 are fixedly connected, the first shift fork ring 131 drives the third shift fork ring 133 to move closer to the second shift fork ring 132. Subsequently, the control shaft 121 continues to rotate, causing the positioning member 122 to abut against the second groove 1321, thereby causing the second shift fork ring 132 and the shift fork 11 to move synchronously towards the first shift fork ring 131. During the rotation of the control shaft 121 in a second direction opposite to the first direction, the positioning member 122 first leaves the second groove 1321, thereby pushing the second shift fork ring 132 and the shift fork 11 away from the first shift fork ring 131 until they return to their initial positions. Then, the control shaft 121 continues to rotate, causing the positioning member 122 to leave the first protrusion 1311, thereby causing the first shift fork ring 131 and the third shift fork ring 133 to return to their initial positions. Through the cooperation of the first shift fork ring 131 and the second shift fork ring 132, the shift fork 11 can move in opposite directions, which in turn allows the clutch 20 to move in opposite directions, realizing gear engagement and disengagement.

[0032] In one embodiment, the third shift fork ring 133 is provided with a third protrusion 1331, and the other side of the second shift fork ring 132 is provided with a fourth groove 1322. The third protrusion 1331 and the fourth groove 1322 are arranged opposite to each other. The positioning member 122 is used to sequentially abut against the third protrusion 1331 and the fourth groove 1322 during the rotation of the control shaft 121 to push the shift fork 11 from the initial position to the other side, and to sequentially leave the fourth groove 1322 and the third protrusion 1331 during the rotation of the control shaft 121 to push the shift fork 11 back to the initial position. Specifically, during the rotation of the control shaft 121 in the second direction, the positioning member 122 first abuts against the third protrusion 1331, thereby pushing the third shift fork ring 133 to move away from the second shift fork ring 132. Since the first shift fork ring 131 and the third shift fork ring 133 are fixedly connected, the third shift fork ring 133 drives the first shift fork ring 131 to move closer to the second shift fork ring 132. Subsequently, the control shaft 121 continues to rotate, causing the positioning member 122 to abut against the fourth groove 1322, thereby causing the second shift fork ring 132 and the shift fork 11 to move synchronously towards the third shift fork ring 133. During the rotation of the control shaft 121 in the first direction, the positioning member 122 first leaves the fourth groove 1322, thereby pushing the second shift fork ring 132 and the shift fork 11 to move synchronously away from the third shift fork ring 133 until they return to their initial positions. Then, the control shaft 121 continues to rotate, causing the positioning member 122 to leave the third protrusion 1331, thereby causing the third shift fork ring 133 and the first shift fork ring 131 to return to their initial positions. Through the cooperation of the third shift fork ring 133 and the second shift fork ring 132, the shift fork 11 can move in opposite directions, which in turn allows the clutch 20 to move in opposite directions, realizing gear engagement and disengagement. Through the cooperation of the first shift fork ring 131, the second shift fork ring 132, the third shift fork ring 133 and the positioning member 122, the shift fork 11 can drive the clutch 20 to engage and disengage with the components (such as gears) on both sides of the clutch 20, thereby saving the space occupied by the clutch 20.

[0033] In one embodiment, the positioning member 122 includes a first positioning pin 1221 and a second positioning pin 1222. The first positioning pin 1221 is located between the first shift fork ring 131 and the second shift fork ring 132, and the second positioning pin 1222 is located between the second shift fork ring 132 and the third shift fork ring 133. The first positioning pin 1221 is used to sequentially abut against the first protrusion 1311 and the second groove 1321 during the rotation of the control shaft 121 to push the shift fork 11 from its initial position to one side, and to sequentially disengage from the second groove 1321 and the first protrusion 1311 during the rotation of the control shaft 121 to push the shift fork 11 back to its initial position. The second positioning pin 1222 is used to sequentially abut against the third protrusion 1331 and the fourth groove 1322 during the rotation of the control shaft 121 to push the shift fork 11 from its initial position to the other side, and to sequentially disengage from the fourth groove 1322 and the third protrusion 1331 during the rotation of the control shaft 121 to push the shift fork 11 back to its initial position. The first positioning pin 1221 and the second positioning pin 1222 correspond to gear engagement and disengagement in two directions, respectively, which can more precisely control the clutch 20 to engage and disengage.

[0034] It is understood that the third shift fork ring 133 is provided with a third groove 1332 corresponding to the first protrusion 1311 on the first shift fork ring 131, so that the first positioning pin 1221 can push the first shift fork ring 131 to move while simultaneously driving the third shift fork ring 133 to move synchronously. The first shift fork ring 131 is provided with a first groove 1312 corresponding to the third protrusion 1331 on the third shift fork ring 133, so that the second positioning pin 1222 can push the third shift fork ring 133 to move while simultaneously driving the first shift fork ring 131 to move synchronously.

[0035] In one embodiment, the drive assembly 10 further includes an elastic member 14 with its two ends respectively abutting against the connector 13 and the shift fork 11. The elastic member 14 is used to be in a compressed state when the positioning member 122 pushes the connector 13, so as to push the shift fork 11 or the connector 13 to move when it returns to the normal state. This can provide a restoring force to the connector 13 when the positioning member 122 pushes the connector 13, thereby reducing the impact force when shifting or shifting gears.

[0036] In one embodiment, the connector 13 further includes a connecting post 134, which passes through the shift fork 11 and is connected at both ends to the first shift fork ring 131 and the third shift fork ring 133, thereby enabling a stable connection between the connector 13 and the shift fork 11 and improving the stability of the shift fork 11 during movement.

[0037] In one embodiment, the elastic element 14 includes a first elastic element 141 and a second elastic element 142 sleeved on the connecting post 134. The two ends of the first elastic element 141 abut against one side of the first shift fork ring 131 and the shift fork 11, respectively, and the two ends of the second elastic element 142 abut against the other side of the third shift fork ring 133 and the shift fork 11, respectively, thereby providing restoring forces to the first shift fork ring 131 and the third shift fork ring 133. The elastic element 14 is a component that undergoes elastic deformation when subjected to force and can return to its initial state after the force is reduced or eliminated. For example, the elastic element 14 is a spring.

[0038] During the rotation of the control shaft 121 in the first direction, the first positioning pin 1221 first abuts against the first protrusion 1311, thereby pushing the first shift fork ring 131 to move away from the second shift fork ring 132. Since the first shift fork ring 131 and the third shift fork ring 133 are fixedly connected, the first shift fork ring 131 drives the third shift fork ring 133 to move closer to the second shift fork ring 132. At this time, the second shift fork ring 132 remains stationary, and the third shift fork ring 133 compresses the second elastic member 142. Afterward, the control shaft 121 continues to rotate, causing the first positioning pin 1221 to abut against the second groove 1321. The second elastic member 142 pushes the shift fork 11, causing the shift fork 11 to move closer to the first shift fork ring 131 towards the second shift fork ring 132. The second elastic member 142 then returns to its initial state. During the rotation of the control shaft 121 in the second direction, the first locating pin 1221 first disengages from the second groove 1321, thereby pushing the second shift fork ring 132 and the shift fork 11 to move synchronously away from the first shift fork ring 131. At this time, the first shift fork ring 131 and the third shift fork ring 133 remain stationary, and the shift fork 11 compresses the second elastic member 142. Afterward, the control shaft 121 continues to rotate, causing the first locating pin 1221 to disengage from the first protrusion 1311, thereby causing the second elastic member 142 to push the third shift fork ring 133 to move away from the second shift fork ring 132, simultaneously driving the first shift fork ring 131 to move closer to the second shift fork ring 132. The second elastic member 142 returns to its initial state, and the first shift fork ring 131 and the third shift fork ring 133 return to their initial positions.

[0039] Specifically, the movement of the shift fork 11 towards the second shift fork ring 132, moving it closer to the first shift fork ring 131, can enable the shift fork 11 to engage the clutch 20. This means the shift fork 11 engages the gear under the push of the second elastic element 142, thus engaging the gear through a non-rigid connection (soft connection), allowing the clutch 20 to better engage with adjacent components. Conversely, the movement of the shift fork 11 towards the second shift fork ring 132 and the shift fork 11, driven by the first locating pin 1221, can enable the shift fork 11 to engage the clutch 20, disengaging the gear. This disengagement is achieved through a rigid connection (i.e., the locating pin directly pushes the shift fork 11), increasing the disengagement speed.

[0040] During the rotation of the control shaft 121 in the second direction, the second positioning pin 1222 first abuts against the third protrusion 1331, thereby pushing the third shift fork ring 133 to move away from the second shift fork ring 132. Since the first shift fork ring 131 and the third shift fork ring 133 are fixedly connected, the third shift fork ring 133 drives the first shift fork ring 131 to move closer to the second shift fork ring 132. At this time, the second shift fork ring 132 remains stationary, and the first shift fork ring 131 compresses the first elastic member 141. Afterward, the control shaft 121 continues to rotate, causing the second positioning pin 1222 to abut against the fourth groove 1322. The first elastic member 141 pushes the shift fork 11, causing the shift fork 11 to drive the second shift fork ring 132 to move closer to the third shift fork ring 133. During the rotation of the control shaft 121 in the first direction, the positioning member 122 first leaves the fourth groove 1322, thereby pushing the second shift fork ring 132 to move away from the third shift fork ring 133. At this time, the first shift fork ring 131 and the third shift fork ring 133 remain stationary, and the shift fork 11 compresses the first elastic member 141. Afterward, the control shaft 121 continues to rotate, causing the positioning member 122 to leave the third protrusion 1331, thereby causing the first elastic member 141 to push the first shift fork ring 131 to move away from the second shift fork ring 132, and driving the third shift fork ring 133 to move closer to the second shift fork ring 132. The first elastic member 141 returns to its initial state, and the first shift fork ring 131 and the third shift fork ring 133 return to their initial positions.

[0041] Specifically, the movement of the shift fork 11 towards the second shift fork ring 132 and closer to the third shift fork ring 133 can drive the clutch 20 to engage gears, i.e., engage gears under the push of the first elastic element 141, thereby engaging gears through a non-rigid connection (soft connection), which allows the clutch 20 to better engage with adjacent components. The movement of the second locating pin 1222 towards the second shift fork ring 132 and the shift fork 11 and further away from the third shift fork ring 133 can drive the clutch 20 to disengage, thereby disengaging gears through a rigid connection (i.e., directly pushing the shift fork 11), which improves the speed of disengagement.

[0042] In one embodiment, one end of the first elastic member 141 abuts against one side of the shift fork 11 via a first washer 135, thereby increasing the interaction force between the first elastic member 141 and the shift fork 11. One end of the second elastic member 142 abuts against the other side of the shift fork 11 via a second washer 136, thereby increasing the interaction force between the second elastic member 142 and the shift fork 11.

[0043] In one embodiment, the connecting post 131 has a protrusion, and the shift fork 11 is sleeved on the protrusion. The first washer 135 abuts against one side of the protrusion, and the second washer 136 abuts against the other side of the protrusion, thereby positioning the first washer 135 and the second washer 136. Simultaneously, when the shift fork 11 is located on the protrusion, there is no interaction force between the shift fork 11 and the first elastic member 141 and the second elastic member 142. When the shift fork 11 leaves the protrusion, there is an interaction force between the first washer 135 and the first elastic member 141, or between the second washer 136 and the second elastic member 142. This ensures that the first elastic member 141 and the second elastic member 142 do not affect each other, resulting in a more balanced force distribution on the first elastic member 141 and the second elastic member 142. This allows for better design of the first elastic member 141 and the second elastic member 142 based on their respective force distribution.

[0044] In one embodiment, there are two connecting posts 134, which are located on both sides of the control shaft 121. Correspondingly, there are also two first elastic members 141 and two second elastic members 142. This allows the first shift fork ring 131 and the third shift fork ring 133 to be fixed at both ends, and the two connecting posts 134 to be respectively inserted on both sides of the shift fork 11, thereby improving the stability of the shift fork movement process.

[0045] In one embodiment, the first shift fork ring 131 has two mounting holes at both ends, each for mounting a connecting post 134. The lines connecting the centers of the two mounting holes to the center of the first shift fork ring 131 are not collinear, i.e., the two mounting holes are staggered, thereby saving axial installation space for the first shift fork ring 131. Simultaneously, the line connecting the centers of the two mounting holes passes through the center of the first shift fork ring 131, which allows for more balanced force distribution on the shift fork 11 and reduces friction between the first shift fork ring 131 and the connecting post 134 during movement. Similarly, the third shift fork ring 133 has two mounting holes at both ends. The two mounting holes of the third shift fork ring 133 have the same structure as the two mounting holes of the first shift fork ring 131, which further improves the force balance of the shift fork 11 and reduces friction between the third shift fork ring 133 and the connecting post 134 during movement.

[0046] In one embodiment, there are two control shafts 121, which are located at the two ends of the shift fork 11 respectively, so as to drive the shift fork 11 to move synchronously. This can balance the forces at both ends of the shift fork 11, thereby further improving the stability of the shift fork 11 during movement, and thus improving the stability of the clutch 20 driven by the shift fork 11 when engaging and disengaging gears.

[0047] like Figure 4As shown, in one embodiment, the shift fork 11 has a first mounting hole 111 and a second mounting hole 112, which are connected. The size of the first mounting hole 111 is larger than the outer diameter of the clutch 20, and the second mounting hole 112 is used to engage with the clutch 20. During assembly, the first mounting hole 111 is first fitted onto the clutch 20, and then the clutch 20 is moved towards the second mounting hole 112 to engage the clutch 20 within the second mounting hole 112. This facilitates assembly and allows the shift fork 11 to be more securely engaged with the clutch 20.

[0048] In one embodiment, this application also provides a mid-mounted transmission, including the aforementioned drive assembly 10, for driving the clutch 20 in the mid-mounted transmission to move, so that the clutch 20 controls the engagement and disengagement between the gears and the shaft.

[0049] In one embodiment, in a mid-mounted transmission, multiple shift forks 11 can be mounted on the control shaft 121, thereby controlling the engagement and disengagement of multiple clutches 20 to meet the multi-gear requirements of the mid-mounted transmission.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A driving component, characterized in that, The system includes a shift fork, a control component, and a connector. The control component includes a control shaft and a positioning component mounted on the control shaft. The connector is axially movably mounted on the control shaft, and the shift fork is mounted on the connector. The connector has a protrusion and / or a groove. The control shaft is used to push the connector to move by contacting the protrusion and / or the groove through the positioning component during rotation, thereby driving the shift fork to move axially. The connector includes a first shift fork ring, a second shift fork ring, and a third shift fork ring. The first, second, and third shift fork rings are all axially movably sleeved on the control shaft and each has the protrusion and / or the groove. The first and third shift fork rings are located at opposite ends of the second shift fork ring and are connected. The shift fork is mounted on the second shift fork ring. The positioning component is used to push the first, second, and third shift fork rings to move in the same or opposite directions by contacting the protrusion and / or the groove.

2. The driving component according to claim 1, characterized in that, The first shift fork ring has a first protrusion, and the second shift fork ring has a second groove on one side. The positioning member is used to abut against the first protrusion and the second groove in sequence during the rotation of the control shaft to push the shift fork to move to one side from the initial position, and to leave the second groove and the first protrusion in sequence during the rotation of the control shaft to push the shift fork back to the initial position.

3. The driving component according to claim 2, characterized in that, The third shift fork ring is provided with a third protrusion, and the other side of the second shift fork ring is provided with a fourth groove. The positioning member is used to sequentially abut against the third protrusion and the fourth groove during the rotation of the control shaft to push the shift fork from the initial position to the other side, and to sequentially leave the fourth groove and the third protrusion during the rotation of the control shaft to push the shift fork back to the initial position.

4. The driving component according to claim 3, characterized in that, The positioning element includes a first positioning pin and a second positioning pin, wherein the first positioning pin is located between the first shift fork ring and the second shift fork ring, and the second positioning pin is located between the second shift fork ring and the third shift fork ring.

5. The driving component according to claim 1, characterized in that, The drive assembly further includes elastic members at both ends that abut against the connector and the shift fork, respectively. The elastic members are used to be in a compressed state when the positioning member pushes the connector, so as to push the shift fork or the connector to move when returning to the normal state.

6. The driving component according to claim 5, characterized in that, The connector also includes a connecting post, which passes through the shift fork and is connected at both ends to the first shift fork ring and the third shift fork ring, respectively.

7. The driving component according to claim 6, characterized in that, The elastic element includes a first elastic element and a second elastic element sleeved on the connecting post. The two ends of the first elastic element abut against one side of the first shift fork ring and the shift fork, respectively, and the two ends of the second elastic element abut against the other side of the third shift fork ring and the shift fork, respectively.

8. The driving component according to claim 6, characterized in that, The number of connecting posts is two, and the two connecting posts are located on both sides of the control shaft.

9. A mid-mounted transmission, characterized in that, Includes the drive component as described in any one of claims 1 to 8.

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