Gearbox gear shifting mechanism and vehicle

Abstract

The invention discloses a gearbox gear shifting mechanism and a vehicle. The gearbox gear shifting mechanism comprises a top cover, a gear shifting drum and a plurality of sets of shifting forks. The gear shifting drum is rotationally installed in the top cover, multiple sets of gear shifting channels are formed in the gear shifting drum at intervals in the axial direction of the gear shifting drum, the gear shifting channels of each set are provided with interlocking sections and multiple gear sections which are sequentially communicated in the circumferential direction of the gear shifting drum, and the interlocking sections and the multiple gear sections of the same set are sequentially arranged in the axial direction of the gear shifting drum. The projections of the multiple gear sections of each group in the axial direction of the gear shifting drum fall on the interlocking section of any group; the multiple sets of shifting forks are matched with the multiple sets of gear shifting channels correspondingly, all the shifting forks can move in the axial direction of the gear shifting drum and are provided with transmission parts, and the transmission parts can slide between the interlocking sections and the gear sections which are matched with each other. According to the scheme, a plurality of shifting forks can be driven by one shifting drum to independently shift gears, so that the cost is saved, and the space occupied by the mechanism is reduced; and meanwhile, interlocking of multiple sets of common-drum shifting forks can be achieved, independent gear shifting of each shifting fork is guaranteed, reliability is good, and assembling convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shifting mechanisms, and in particular to a gearbox shifting mechanism and a vehicle. Background Art

[0002] After the gearbox has multiple gears, shift control has become a key technology in the design of the gearbox. The shift mechanism of the multi-speed gearbox mainly includes the actuator motor, the shift drum and the shift fork. The shift drum is an important part of the shift mechanism, and its function is to drive the shift fork to perform the shift operation. The key part of the shift drum is the spiral track groove on the shift drum. One end of the shift fork is embedded in the spiral track groove of the shift drum and slides. When the drive motor drives the shift drum to rotate a certain angle, the shift fork will move left and right, thereby driving the meshing of the gear sets with different transmission ratios to achieve gear shifting.

[0003] For example, patent CN220523279U discloses a lubricating shift mechanism and a vehicle, which connects a lubrication pump to a drive motor, selectively connects a one-way clutch to the drive motor, cooperates a shift drum with the one-way clutch, and extends one end of a shift fork into a shift slot. When the drive motor rotates forward, the drive motor drives the lubrication pump to pump oil, so that the lubrication pump lubricates and cools the vehicle drive and shaft teeth.

[0004] However, the motor-drum shift mechanism in the patent is a shift drum that controls a shift fork. When there are more gears, multiple sets of drums and shift forks are required, which leads to a corresponding increase in cost and increased space. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and to propose a gearbox shifting mechanism and a vehicle, so as to solve the technical problem that the motor drum shifting mechanism in the prior art is a shifting drum controlling a shifting fork. When there are more gears, multiple sets of drums and shift forks need to be equipped, which leads to a corresponding increase in cost and an increase in occupied space.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a gearbox shifting mechanism, comprising: Top cover; A shift drum is rotatably mounted in the top cover and is provided with a plurality of shift grooves at intervals along its axial direction. The shift grooves of each group are provided with interlocking segments and a plurality of shift segments that are connected in sequence along the circumferential direction of the shift drum. The interlocking segments and the plurality of shift segments of the same group are arranged in sequence along the axial direction of the shift drum. The projections of the plurality of shift segments of each group in the axial direction of the shift drum fall on any group of interlocking segments; and A plurality of shift forks are respectively adapted to the plurality of shift grooves, each of the shift forks is installed in the top cover and can move along the axial direction of the shift drum, and has a transmission part, and the transmission part can slide between the adapted interlocking section and the gear section.

[0007] In some embodiments, the interlocking segment and each of the gear segments are arranged in a straight line when the outer side wall of the shift drum is unfolded, and a first connecting segment is provided between the interlocking segment and the adjacent gear segment, and a second connecting segment is provided between two adjacent gear segments, and the first connecting segment and the second connecting segment are arranged at an angle.

[0008] In some embodiments, the gearbox shift mechanism further includes a shift motor and a reduction gear set, wherein the shift motor is disposed outside the top cover, and its output shaft extends into the top cover, and the reduction gear set is disposed between the output shaft and the shaft body of the shift drum, and is used to transmit the rotation of the output shaft to the shaft body of the shift drum; Among them, the starting torque of the shift motor is T, the disengagement force of the shift fork is F, the inclination angle of the first connecting section and the second connecting section is α, the radius of the disengagement force acting on the shift fork is r, and the speed ratio of the reduction gear set is i, satisfying T>F·r / (i·tanα).

[0009] In some embodiments, the speed ratio i of the reduction gear set satisfies i≥60.

[0010] In some embodiments, the reduction gear set includes an output gear, a first reduction gear, a second reduction gear and a third reduction gear, the output gear is arranged on the output shaft, the first reduction gear and the second reduction gear are rotatably arranged in the top cover, and the third reduction gear is arranged on the shaft of the shift drum; Wherein, the output gear, the first reduction gear, the second reduction gear and the third reduction gear are meshed in sequence.

[0011] In some embodiments, the transmission part is a transmission roller, the seat of the transmission roller is installed on the base of the shift fork, and the roller is rollingly embedded in the corresponding shifting groove.

[0012] In some embodiments, the base of the shift fork is provided with a press-fitting hole, and the seat body of the transmission roller is press-fitted into the press-fitting hole.

[0013] In some embodiments, the gearbox shift mechanism further comprises a plurality of sets of mounting shafts, the plurality of sets of mounting shafts being located inside the top cover and corresponding to the shift drum, and the axial direction of each of the mounting shafts being the same as the axial direction of the shift drum; The plurality of groups of shift forks are respectively mounted on the plurality of groups of mounting shafts, and each of the shift forks can move along the axial direction of the corresponding mounting shaft.

[0014] In some embodiments, the shift fork is a symmetrical shift fork.

[0015] In a second aspect, the present invention further provides a vehicle, comprising a transmission shift mechanism as described in any one of the above.

[0016] Compared with the prior art, in the gearbox shift mechanism provided by the present invention, multiple shift grooves are provided on a shift drum to correspond to multiple groups of shift forks, and the projection of the shift segment of each shift groove in the axial direction of the shift drum falls on the interlocking segment of any other group. In this way, when the transmission part of a group of shift forks slides between the multiple gear segments that are adapted to drive the shift forks to move along the axial direction of the shift drum to switch gears, since the multiple gear segments that are adapted to it correspond to the interlocking segments of other groups, the transmission parts of the other groups of shift forks are always in the adapted interlocking segments at this time, and no gear switching occurs, so that each shift fork can shift gears independently, and two or more shift forks will not shift gears at the same time, meeting the design requirements. Therefore, this scheme can drive multiple shift forks to shift gears independently through one shift drum, avoid the configuration of multiple groups of shift drums and shift forks when there are multiple gears, save costs, and reduce the space occupied by the mechanism; at the same time, multiple groups of shift grooves of the shift drum can be used to realize the interlocking of multiple groups of shift forks on the same drum, ensuring that each shift fork shifts gears independently, and having good reliability. In addition, the present solution integrates the shaft-changing drum and the shift fork on the top cover to form a subassembly, and during assembly, the subassembly is directly assembled on the gearbox body, thereby improving assembly convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a gearbox shifting mechanism provided by an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the gearbox shift mechanism without the top cover shown; Figure 3 yes Figure 2 Schematic diagram of the first shift fork, the third shift fork and the first shift drum; Figure 4 yes Figure 3 A schematic diagram of the outer side wall of the first shift drum when it is unfolded; Figure 5 yes Figure 2 Schematic diagram of the shift fork and shift drum; Figure 6 yes Figure 5 Cross-sectional view of the shift fork and shift drum.

[0018] Description of reference numerals: 1. Top cover; 2. Shift drum; 21. Shift groove; 21a. Interlocking section; 21b. Shift section; 21c. First connecting section; 21d. Second connecting section; 22. First shift drum; 23. Second shift drum; 3. Shift fork; 31. Transmission part; 311. Transmission roller; 312. Seat; 313. Roller; 32. Base; 32a. Press-fit hole; 33. First shift fork; 34. Second shift fork; 35. Third shift fork; 36. Fourth shift fork; 4. Shift motor; 5. Reduction gear set; 51. Output gear; 52. First reduction gear; 53. Second reduction gear; 54. Third reduction gear; 6. Mounting shaft. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem that the motor-drum shift mechanism in the prior art is a shift drum controlling a shift fork, and when there are more gears, multiple sets of drums and forks need to be equipped, resulting in a corresponding increase in cost and an increase in space occupied, the present invention provides a gearbox shift mechanism that can drive multiple forks to shift independently through a shift drum, avoiding the need to equip multiple sets of shift drums and forks when there are multiple gears, saving costs and reducing the space occupied by the mechanism; at the same time, multiple sets of shift grooves of the shift drum can be used to achieve interlocking of multiple sets of shift forks on the same drum, ensuring that each shift fork shifts independently and has better reliability. In addition, the present solution integrates the shaft-shifting drum and the shift fork on the top cover to form a subassembly, which is directly assembled on the gearbox body during assembly to improve assembly convenience.

[0021] It should be noted that the transmission shift mechanism described in the present invention is used for but not limited to vehicles, etc. For the convenience of explanation, in the present invention, only the transmission shift mechanism applied to vehicles is used as an example for explanation, and the principles of the transmission shift mechanism applied to other types of equipment are essentially the same as those applied to vehicles, and will not be described in detail here.

[0022] See also Figures 1 to 4 , Figures 1 to 4The present invention is a schematic structural diagram of a gearbox shift mechanism in an embodiment of the present invention, wherein the gearbox shift mechanism comprises a top cover 1, a shift drum 2 and a plurality of shift forks 3; the shift drum 2 is rotatably mounted in the top cover 1, and a plurality of shift grooves 21 are provided at intervals along its axial direction, each group of the shift grooves 21 is provided with an interlocking segment 21a and a plurality of shift segments 21b which are connected in sequence along the circumferential direction of the shift drum 2, the interlocking segments 21a and the plurality of shift segments 21b of the same group are arranged in sequence along the axial direction of the shift drum 2, and the projection of the plurality of shift segments 21b of each group in the axial direction of the shift drum 2 falls on any group of the interlocking segments 21a; the plurality of shift forks 3 are respectively adapted to the plurality of shift grooves 21, each shift fork 3 is mounted in the top cover 1, and can move along the axial direction of the shift drum 2, and has a transmission portion 31, and the transmission portion 31 can slide between the adapted interlocking segment 21a and the shift segment 21b.

[0023] In the gearbox shift mechanism provided by the present invention, a plurality of shift grooves 21 are provided on a shift drum 2 to correspond to a plurality of groups of shift forks 3, and the projection of the shift segment 21b of each shift groove 21 in the axial direction of the shift drum 2 falls on the interlocking segment 21a of any other group. In this way, when the transmission part 31 of a group of shift forks 3 slides between the multiple adapted shift segments 21b to drive the shift forks 3 to move along the axial direction of the shift drum 2 to switch gears, since the multiple adapted shift segments 21b correspond to the interlocking segments 21a of other groups, the transmission parts 31 of the other groups of shift forks 3 are always in the adapted interlocking segments 21a at this time, and no gear switching occurs, so that each shift fork 3 can shift gears independently, and the situation where two or more shift forks 3 shift gears at the same time will not occur, which meets the design requirements. Therefore, this solution can drive multiple shift forks 3 to shift independently through one shift drum 2, avoiding the need to equip multiple sets of shift drums 2 and shift forks 3 when there are multiple gears, saving costs and reducing the space occupied by the mechanism; at the same time, multiple sets of shift grooves 21 of the shift drum 2 can be used to interlock multiple sets of shift forks 3 on the same drum, ensuring that each shift fork 3 shifts independently, with better reliability. In addition, this solution integrates the shaft-shifting drum and shift fork 3 on the top cover 1 to form a subassembly, which is directly assembled on the gearbox body during assembly to improve assembly convenience.

[0024] In one embodiment, see Figure 4 The interlocking section 21a and each gear section 21b are arranged in a straight line when the outer side wall of the shift drum 2 is unfolded, and a first connecting section 21c is provided between the interlocking section 21a and the adjacent gear section 21b, and a second connecting section 21d is provided between two adjacent gear sections 21b, and the first connecting section 21c and the second connecting section 21d are arranged at an angle.

[0025] In this embodiment, the interlocking section 21a is connected to the adjacent shift section 21b through the first connecting section 21c, and the adjacent two shift sections 21b are connected through the second connecting section 21d. Since the interlocking section 21a and the plurality of shift sections 21b have different axial positions along the shift drum 2, the position of the shift fork 3 can be changed, i.e., shifting. When the transmission part 31 slides in the groove of the interlocking section 21a or the shift section 21b, since the interlocking section 21a or the shift section 21b has the same axial position in their respective grooves, the shift fork 3 is in the shifting completion stage. When the transmission part 31 slides in the groove of the first connecting section 21c or the second connecting section 21d, since the side walls of the grooves of the first connecting section 21c and the second connecting section 21d are in an inclined state, the positions of their respective grooves in the axial direction are different, and the shift fork 3 is in the shifting movement process, i.e., moving in the axial direction, and the axial force of the axial movement comes from the rotation of the shift drum 2.

[0026] In one embodiment, the gearbox shifting mechanism also includes a shifting motor 4 and a reduction gear set 5. The shifting motor 4 is arranged outside the top cover 1, and its output shaft extends into the top cover 1. The reduction gear set 5 is arranged between the output shaft and the shaft body of the shift drum 2, and is used to transmit the rotation of the output shaft to the shaft body of the shift drum 2; wherein, the starting torque of the shifting motor 4 is T, the disengaging force of the shift fork 3 is F, the inclination angle of the first connecting section 21c and the second connecting section 21d is α, the radius of the disengaging force acting on the shift fork 3 is r, and the speed ratio of the reduction gear set 5 is i, satisfying T>F·r / (i·tanα).

[0027] In this embodiment, when the shifting is completed, the shifting motor 4 stops rotating. At this time, if the shifting fork 3 is to be fixed, it is only necessary to satisfy that the torque calculated from the disengagement force to the end of the shifting motor 4 is less than the starting torque of the motor. Specifically, the above parameters need to satisfy T>F·r / (i·tanα) to achieve self-locking of the shifting fork 3 and improve the shifting stability. Specifically, the speed ratio i of the reduction gear set 5 satisfies i≥60. That is, the speed ratio of the reduction gear set 5 can reach more than 60, and a large reduction ratio is adopted. It should be noted that the inclination angle α of the first connecting section 21c and the second connecting section 21d can be set to be the same or different, as long as the requirement of T>F·r / (i·tanα) is satisfied. In one embodiment, the inclination angle α of the first connecting section 21c and the second connecting section 21d is set to 26°.

[0028] In one embodiment, see Figure 2The reduction gear set 5 includes an output gear 51, a first reduction gear 52, a second reduction gear 53 and a third reduction gear 54. The output gear 51 is arranged on the output shaft, the first reduction gear 52 and the second reduction gear 53 are rotatably arranged in the top cover 1, and the third reduction gear 54 is arranged on the shaft of the shift drum 2; wherein, the output gear 51, the first reduction gear 52, the second reduction gear 53 and the third reduction gear 54 are meshed in sequence.

[0029] In this embodiment, the output gear 51 of the output shaft of the shift motor 4 is meshed with the first reduction gear 52, the first reduction gear 52 is meshed with the second reduction gear 53, and the second reduction gear 53 is meshed with the third reduction gear 54. The above-mentioned gears are all integrated on the top cover 1 to form a sub-assembly, which reduces the assembly process and improves convenience.

[0030] In one embodiment, see Figure 5 and Figure 6 The transmission part 31 is a transmission roller 311 , a seat 312 of the transmission roller 311 is mounted on a base 32 of the shift fork 3 , and a roller 313 thereof is rollingly embedded in a corresponding shifting groove 21 .

[0031] In this embodiment, the transmission part 31 is configured as a transmission roller 311, and its roller 313 is embedded in the shift groove 21, so that the roller 313 rolls along the groove, reducing the wear of the shift drum 2 and extending its service life.

[0032] In one embodiment, the base 32 of the shift fork 3 is provided with a press-fitting hole 32 a , and the seat body 312 of the driving roller 311 is press-fitted into the press-fitting hole 32 a .

[0033] In this embodiment, a press-fitting hole 32a is provided on the base 32 of the shift fork, and the seat 312 of the transmission roller 311 is press-fitted into the press-fitting hole 32a. Thus, when the transmission roller 311 is damaged and needs to be replaced, it is only necessary to remove and press-fit the seat 312 of the transmission roller 311 from the base 32, which is simple and convenient to operate. Moreover, the positions of the shift drum 2 and the shift fork 3 can limit the seat 312 of the transmission roller 311 from being separated from the base 32 of the shift fork 3, thereby ensuring the installation stability of both.

[0034] In one embodiment, the gearbox shift mechanism also includes multiple groups of mounting shafts 6, which are located on the inner side of the top cover 1 and correspond to the shift drum 2, and the axial direction of each mounting shaft 6 is the same as the axial direction of the shift drum 2; multiple groups of shift forks 3 are respectively installed on the multiple groups of mounting shafts 6, and each shift fork 3 can move along the axial direction of the corresponding mounting shaft 6.

[0035] In this embodiment, a plurality of shift forks 3 are respectively mounted on a plurality of mounting shafts 6, that is, a plurality of shift forks 3 are not coaxial, which improves the flexibility of the shift forks 3. Specifically, in this solution, each shift fork 3 is a symmetrical shift fork 3. In this way, non-coaxial shift forks 3 are used together, and symmetrical shift forks 3 are used to reduce the variety of shift forks 3. It should be understood that the mounting shaft 6 can be fixedly mounted on the inner side of the top cover 1 by other components, which will not be described in detail here.

[0036] It should be noted that, for the convenience of description, the shift drum 2 and multiple groups of shift forks 3 are defined as a group of shift components. In one embodiment, the shift mechanism includes two groups of shift components, and correspondingly, the shift motor 4 and the reduction gear group 5 are respectively provided with two groups. In addition, each group of shift forks 3 and mounting shafts 6 are respectively provided with two, and the four shift forks 3 are not coaxial. Specifically, it includes a first shift fork 33, a second shift fork 34, a third shift fork 35, a fourth shift fork 36, a first shift drum 22 and a second shift drum 23. Among them, the first shift fork 33 and the third shift fork 35 are drummed together on the first shift drum 22 to form a group of shift components; the second shift fork 34 and the fourth shift fork 36 are drummed together on the second shift drum 23 to form another group of shift components. Among them, the first shift fork 33 is the same as the fourth shift fork 36, and the second shift fork 34 is the same as the third shift fork 35.

[0037] In addition, the present invention further provides a vehicle, the vehicle includes a transmission shift mechanism as described in any one of the above. It should be noted that the detailed structure of the transmission shift mechanism of the vehicle can refer to the embodiment of the transmission shift mechanism described above, and will not be repeated here; since the transmission shift mechanism described above is used in the vehicle of the present invention, the embodiment of the vehicle of the present invention includes all technical solutions of all embodiments of the transmission shift mechanism described above, and the technical effects achieved are also exactly the same, and will not be repeated here.

[0038] In order to better understand the present invention, the following Figures 1 to 6 The technical solution of the present invention is described in detail: In this embodiment, two groups of shift grooves 21 are provided on each shift drum 2, and each group of shift grooves 21 includes an interlocking section 21a and two gear sections 21b. For ease of description, the two groups of shift grooves 21 are defined as a first shift groove 21 and a second shift groove 21. The interlocking section 21a of the first shift groove 21 is correspondingly set to high gear, and its two gear sections 21b are correspondingly set to neutral gear and low gear in sequence; the interlocking section 21a of the second shift groove 21 is correspondingly set to low gear, and its two gear sections 21b are correspondingly set to neutral gear and high gear in sequence.

[0039] This solution is achieved by designing the shape of the shift groove 21 on the shift drum 2, see Figure 3 and Figure 4 , taking the first shift fork 33, the third shift fork 35 and the first shift drum 22 as an example, Figure 4The schematic diagram of the profile of the shifting groove 21 of the first shifting drum 22 is shown in the figure. The horizontal axis is the gear position diagram: high gear, neutral gear, low gear, and the vertical axis is the position diagram of the shift fork 3 in the circumferential direction of the shifting drum 2. Assuming that the initial positions of the two shift forks 3 are both in the low gear, that is, position 1, to shift the two shift forks 3 to the high gear, that is, position 5, the shifting process is as follows, as the shifting drum 2 rotates: 1) From position 1 to position 2, the third shift fork 35 changes from low gear to neutral gear, and the first shift fork 33 is still in low gear; 2) From position 2 to position 3, the third shift fork 35 changes from neutral to high gear, and the first shift fork 33 is still in low gear; 3) From position 3 to position 4, the third shift fork 35 is still in high gear, and the first shift fork 33 changes from low gear to neutral gear; 4) From position 4 to position 5, the third shift fork 35 is still in high gear, and the first shift fork 33 changes from neutral gear to high gear; During the whole process, the two shift forks 3 did not shift gears simultaneously, which met the design requirements.

[0040] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A gearbox shift mechanism, characterized in that: include: Top cover; A shift drum is rotatably mounted in the top cover, and is provided with a plurality of shift grooves at intervals along its axial direction, each group of the shift grooves is provided with an interlocking segment and a plurality of shift segments that are sequentially connected along the circumferential direction of the shift drum, the interlocking segment and the plurality of shift segments of the same group are sequentially arranged along the axial direction of the shift drum, and the projection of the plurality of shift segments of each group in the axial direction of the shift drum falls on any group of the interlocking segments; and A plurality of shift forks are respectively adapted to the plurality of shift grooves, each of the shift forks is installed in the top cover and can move along the axial direction of the shift drum, and has a transmission part, and the transmission part can slide between the adapted interlocking section and the gear section.

2. The gearbox shift mechanism according to claim 1, characterized in that: The interlocking section and each of the gear sections are arranged in a straight line when the outer side wall of the shift drum is unfolded, and a first connecting section is provided between the interlocking section and the adjacent gear section, and a second connecting section is provided between two adjacent gear sections, and the first connecting section and the second connecting section are arranged obliquely.

3. The gearbox shifting mechanism according to claim 2, characterized in that: The gearbox shift mechanism further comprises a shift motor and a reduction gear set, wherein the shift motor is arranged outside the top cover, and its output shaft extends into the top cover, and the reduction gear set is arranged between the output shaft and the shaft body of the shift drum, and is used to transmit the rotation of the output shaft to the shaft body of the shift drum; Among them, the starting torque of the shift motor is T, the disengagement force of the shift fork is F, the inclination angle of the first connecting section and the second connecting section is α, the radius of the disengagement force acting on the shift fork is r, and the speed ratio of the reduction gear set is i, satisfying T>F·r / (i·tanα).

4. The gearbox shift mechanism according to claim 3, characterized in that: The speed ratio i of the reduction gear set satisfies i≥60.

5. The gearbox shifting mechanism according to claim 3 or 4, characterized in that: The reduction gear set includes an output gear, a first reduction gear, a second reduction gear and a third reduction gear, wherein the output gear is arranged on the output shaft, the first reduction gear and the second reduction gear are rotatably arranged in the top cover, and the third reduction gear is arranged on the shaft of the shift drum; Wherein, the output gear, the first reduction gear, the second reduction gear and the third reduction gear are meshed in sequence.

6. The gearbox shift mechanism according to claim 1, characterized in that: The transmission part is a transmission roller, the seat of the transmission roller is installed on the base of the shift fork, and the roller is rollingly embedded in the matching shifting groove.

7. The gearbox shift mechanism according to claim 6, characterized in that: The base of the shift fork is provided with a press-fitting hole, and the seat body of the transmission roller is press-fitted in the press-fitting hole.

8. The gearbox shift mechanism according to claim 1, characterized in that: The gearbox shift mechanism further comprises a plurality of mounting shafts, the plurality of mounting shafts being located inside the top cover and corresponding to the shift drum, the axial direction of each mounting shaft being the same as the axial direction of the shift drum; The plurality of groups of shift forks are respectively mounted on the plurality of groups of mounting shafts, and each of the shift forks can move along the axial direction of the corresponding mounting shaft.

9. The gearbox shift mechanism according to claim 1, characterized in that: The shift fork is a symmetrical shift fork.

10. A vehicle, characterized in that: It comprises a gearbox shifting mechanism as described in any one of claims 1 to 9.

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