Speed reducer device, vehicle transmission system and vehicle
By setting up an energy-absorbing structure in the reducer device to absorb the force during pressure installation, the problem of deformation and damage to the gear teeth of the secondary reduction driving member is solved, the transmission efficiency and accuracy are improved, the safety of the vehicle is enhanced, and the cost is reduced.
Patent Information
- Application Number
- CN202421568241.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-03
AI Technical Summary
When installing the first-stage driven gear and the second-stage driven gear, the pressure applied by the press will cause the gear teeth of the secondary deceleration driving member to be deformed and damaged, affecting the transmission accuracy and efficiency of the reducer.
A reducer device is designed in which an energy-absorbing structure is arranged between the first-stage reduction follower and the transmission teeth of the second-stage reduction follower. After the second-stage reduction action and the first-stage reduction follower are fitted, the energy-absorbing structure absorbs the force during continuous pressure installation and reduces the pressure transmitted to the transmission teeth.
Through the design of the energy-absorbing structure, the pressure transmitted to the transmission teeth is reduced, the transmission teeth is protected, the transmission efficiency and accuracy are improved, the vibration noise is reduced, the vehicle's driving safety is improved, and the manufacturing and replacement costs of the secondary speed reduction active parts are reduced.
Smart Images
Figure CN222732062U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to a reducer device, a vehicle transmission system and a vehicle. Background Art
[0002] The vehicle usually includes a speed reducer, which can be connected between the drive motor and the rotating shaft of the wheel to reduce the output speed of the drive motor to the wheel, etc. Taking the two-stage speed reducer as an example, it usually includes a primary driven gear and a secondary driving gear located between the drive motor and the rotating shaft of the wheel, the primary driven gear cooperates with the drive motor to achieve a primary speed reduction, the primary driven gear and the secondary driving gear are connected and rotate synchronously, a differential subassembly is also arranged between the secondary driving gear and the rotating shaft of the wheel, and the secondary driving gear and the differential subassembly cooperate to achieve a secondary speed reduction.
[0003] When installing the primary driven gear and the secondary driving gear, a press is used. For example, the primary driven gear can be fixed at a preset position, and the secondary driving gear can be driven by the press to move toward the primary driven gear to connect with the primary driven gear. When the primary driven gear and the secondary driving gear are connected in place, the primary driven gear fits with the secondary driving gear.
[0004] In the related art, after the primary driven gear and the secondary driving gear are connected in place, the press continues to work. At this time, the secondary reduction active component no longer moves. Since the force is mutual, the primary driven gear will apply a huge holding pressure to the secondary driving gear, and the position of the holding pressure corresponds to the teeth of the secondary driving gear. The teeth of the secondary driving gear are similar to a cantilever beam structure, so the existence of the holding pressure will cause the teeth of the secondary driving gear to deform and be damaged, thereby affecting the transmission accuracy and efficiency of the reducer. Utility Model Content
[0005] In order to solve the above technical problems, the present application provides a reducer device, a vehicle transmission system and a vehicle.
[0006] In a first aspect, the present application provides a speed reducer device, comprising an intermediate shaft assembly; the intermediate shaft assembly comprises a primary speed reduction driven member and a secondary speed reduction active member, and the outer periphery of the secondary speed reduction active member has transmission teeth;
[0007] The primary reduction driven member is connected to one axial side of the secondary reduction active member by a press-fitting method, and the primary reduction driven member can be fitted with the secondary reduction active member after being connected to the secondary reduction active member in place;
[0008] An energy absorbing structure is provided between the primary reduction follower and the transmission tooth. The energy absorbing structure is used to absorb the force between the primary reduction follower and the transmission tooth when the press-fitting is continued after the secondary reduction active member is fitted with the primary reduction follower, so as to reduce at least part of the holding pressure transmitted to the transmission tooth.
[0009] In some embodiments, the energy absorption structure includes an energy absorption groove provided between the primary reduction driven member and the secondary reduction active member, the energy absorption groove extending radially along the intermediate shaft assembly with the groove opening facing outwards;
[0010] Along the rotation axis of the intermediate shaft assembly, the energy absorption groove is located beside the transmission tooth, and at least a portion of the projection of the energy absorption groove on the transmission tooth coincides with the transmission tooth;
[0011] The side groove wall of the energy absorbing groove may be deformed under the action force between the primary reduction follower and the transmission tooth to absorb at least part of the holding force.
[0012] In some embodiments, the secondary speed reduction active component includes an intermediate shaft and a protrusion arranged on the circumference of the intermediate shaft;
[0013] The transmission tooth is located on the intermediate shaft, and the protrusion is located between the transmission tooth and the primary reduction driven member, and can be fitted with the primary reduction driven member;
[0014] The outer edge of the protrusion is located on the inner side of the tooth top circle of the transmission tooth, and the energy absorption structure is located between the protrusion and the primary reduction driven member.
[0015] In some embodiments, the energy absorbing structure includes an energy absorbing groove opened on the outer peripheral wall of the protrusion and facing outward.
[0016] In some embodiments, the protrusion is arranged to extend along the circumference of the intermediate shaft;
[0017] The energy absorbing groove is extended along the circumference of the protrusion.
[0018] In some embodiments, the outer contour edge of the protrusion is located in the space defined by the addendum circle and the root circle of the transmission tooth;
[0019] Alternatively, the outer contour edge of the protrusion is located on the inner side of the root circle of the transmission tooth and is arranged close to the root circle.
[0020] In some embodiments, in the radial direction of the secondary deceleration active component, the inner bottom wall of the energy absorption groove is located on the inner side of the root circle of the transmission tooth.
[0021] In some embodiments, the energy absorption groove includes two inner side walls spaced apart along the rotation axis of the secondary deceleration active member and an inner bottom wall connected between the two inner side walls;
[0022] The junctions between the inner side walls and the inner bottom wall are smoothly transitioned.
[0023] In a second aspect, the present application provides a vehicle transmission system, comprising the reducer device as described above.
[0024] In a third aspect, the present application provides a vehicle comprising the vehicle transmission system as described above.
[0025] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:
[0026] The reducer device, vehicle transmission system and vehicle provided by the present application have an energy absorption structure between the transmission teeth of the primary reduction driven member and the secondary reduction active member of the intermediate shaft assembly, so that the energy absorption structure is used to absorb the force between the primary reduction driven member and the transmission teeth during the continuous press-fitting after the secondary reduction active member and the primary reduction driven member are fitted, so as to reduce at least part of the holding pressure transmitted to the transmission teeth. In this way, when the secondary reduction active member and the primary reduction driven member are fitted, the energy absorption structure can absorb the force between the secondary reduction active member and the primary reduction driven member during the continuous press-fitting to a certain extent, thereby reducing the holding pressure transmitted to the transmission teeth to a certain extent, and then can protect the transmission teeth to a certain extent, improve the deformation and damage of the transmission teeth to a certain extent, and then be beneficial to the transmission efficiency and transmission accuracy, ensure the vibration and noise performance of the entire reducer device, improve the safety of vehicle driving, and in this way, can also reduce the manufacturing and replacement costs of the secondary reduction active member to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0029] Figure 1 This is a structural schematic diagram of the process of connecting the primary reduction driven member and the secondary reduction active member according to an embodiment of the present application;
[0030] Figure 2This is a schematic diagram of the structure when the primary reduction driven member and the secondary reduction active member according to an embodiment of the present application are connected in place;
[0031] Figure 3 The structure of the two-stage deceleration active component described in the embodiment of the present application is shown in FIG. Figure 1 ;
[0032] Figure 4 The structure of the two-stage deceleration active component described in the embodiment of the present application is shown in FIG. Figure 2 ;
[0033] Figure 5 for Figure 4 The enlarged view of point I in the middle;
[0034] Figure 6 for Figure 2 A schematic diagram of the intermediate shaft assembly after being cut away along the rotation axis;
[0035] Figure 7 for Figure 6 The enlarged view of point A in the middle;
[0036] Figure 8 This is a schematic diagram of the structure of the reducer device described in an embodiment of the present application.
[0037] Among them, 100, reducer device; 10, intermediate shaft assembly; 1, primary reduction driven member; 11, internal spline; 12, matching surface; 2, secondary reduction active member; 21, intermediate shaft; 211, transmission tooth; 22, protrusion; 221, energy absorption structure; 222, inner side wall; 223, inner bottom wall; 23, external spline; 20, input shaft; 201, active tooth; 30, differential subassembly; 301, differential body; 302, main reduction member. DETAILED DESCRIPTION
[0038] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.
[0040] Reference Figures 1 to 8As shown, this embodiment provides a reducer device. The reducer device 100 is generally located below the front cabin powertrain bracket and can be connected between the output shaft of the drive motor and the driving half shaft of the wheel in the vehicle to form at least part of the vehicle transmission system. The reducer device 100 specifically includes an intermediate shaft assembly 10; the intermediate shaft assembly 10 includes a primary reduction driven member 1 and a secondary reduction active member 2, and the outer periphery of the secondary reduction active member 2 has a transmission tooth 211.
[0041] Specifically, the primary reduction follower 1 is connected to one axial side of the secondary reduction active component 2 by a press-fitting method, so that the secondary reduction active component 2 can rotate synchronously with the primary reduction follower 1, and the primary reduction follower 1 can fit with the secondary reduction active component 2 after being connected to the secondary reduction active component 2 in place.
[0042] Exemplarily, the primary reduction follower 1 can cooperate with the output shaft of the driving motor to reduce the output speed of the driving motor. For example, the primary reduction follower 1 can be a primary reduction gear, and the output shaft of the driving motor is connected to the input shaft 20, and the input shaft 20 is provided with a driving tooth 201 that can be matched with the primary reduction gear to achieve reduction.
[0043] Exemplarily, a differential subassembly 30 is provided between the secondary reduction active member 2 and the driving half shaft of the wheel, referring to Figure 8 As shown, the differential subassembly 30 may include a differential body 301 and a main reduction member 302 connected to each other. The main reduction member 302 may cooperate with the secondary reduction active member 2 for reduction transmission to perform secondary reduction on the rotation speed after primary reduction. For example, the main reduction member 302 may be a main reduction gear that can cooperate with the above-mentioned transmission tooth 211 for secondary reduction.
[0044] Among them, there is an energy absorption structure 221 between the primary reduction follower 1 and the transmission tooth 211. The energy absorption structure 221 is used to absorb the force between the primary reduction follower 1 and the transmission tooth 211 when the press-fitting continues after the secondary reduction active member 2 and the primary reduction follower 1 are fitted together, so as to reduce at least part of the holding pressure transmitted to the transmission tooth 211.
[0045] The reducer device provided in this embodiment has an energy absorbing structure 221 between the primary reduction driven member 1 and the transmission tooth 211 of the secondary reduction active member 2 of the intermediate shaft assembly 10, so that the energy absorbing structure 221 is used to absorb the force between the primary reduction driven member 1 and the transmission tooth 211 when the secondary reduction active member 2 is fitted with the primary reduction driven member 1, so as to reduce at least part of the holding pressure transmitted to the transmission tooth 211. With such arrangement, when the secondary reduction active component 2 is fitted with the primary reduction driven component 1, the energy absorption structure 221 can absorb to a certain extent the acting force between the secondary reduction active component 2 and the primary reduction driven component 1 during continued press-fitting, thereby reducing to a certain extent the holding pressure transmitted to the transmission tooth 211, and thus being able to protect the transmission tooth 211 to a certain extent, improving to a certain extent the deformation and damage of the transmission tooth 211, which is beneficial to the transmission efficiency and transmission accuracy, ensuring the vibration and noise performance of the entire reducer device 100, and improving the vehicle driving safety, and in this way it can also reduce to a certain extent the manufacturing and replacement costs of the secondary reduction active component 2.
[0046] In some embodiments, reference Figures 4 to 7 As shown, the energy absorption structure 221 includes an energy absorption groove opened between the primary reduction driven component 1 and the secondary reduction active component 2, and the energy absorption groove extends radially along the intermediate shaft assembly 10 with the groove opening facing outward. Along the rotation axis of the intermediate shaft assembly 10, the energy absorption groove is located beside the transmission tooth 211, and at least part of the projection of the energy absorption groove on the transmission tooth 211 overlaps with the transmission tooth 211. Among them, the side groove wall of the energy absorption groove can be deformed under the action between the secondary reduction active component 2 and the primary reduction driven component 1 to absorb at least part of the holding pressure. Among them, the rotation axis of the intermediate shaft assembly 10 is specifically Figure 4 MM shown.
[0047] In this way, the energy absorbing groove can absorb the holding pressure transmitted to the transmission tooth 211 by the primary reduction driven member 1 to a certain extent, thereby effectively improving the deformation and damage of the transmission tooth 211 under the holding pressure. In addition, the energy absorbing groove is arranged to absorb at least part of the holding pressure, and is also conducive to realizing the material reduction design of the reducer device 100, thereby realizing the lightweight of the reducer device 100.
[0048] Of course, in other implementations, the energy absorbing structure 221 may also be a spring or the like.
[0049] In some embodiments, reference Figures 3 to 7As shown, the secondary reduction active member 2 includes an intermediate shaft 21 and a protrusion 22 arranged in the circumferential direction of the intermediate shaft 21. The transmission tooth 211 is located on the intermediate shaft 21, and the protrusion 22 is located between the transmission tooth 211 and the primary reduction driven member 1, and can fit with the primary reduction driven member 1. The outer edge of the protrusion 22 is located on the inner side of the tooth top circle of the transmission tooth 211, and the energy absorption structure 221 is located between the protrusion 22 and the primary reduction driven member 1.
[0050] Reference Figures 2 to 7 As shown, when the primary reduction follower 1 and the secondary reduction active member 2 are connected in place, the pressure head (not shown in the figure, specifically located on the side of the secondary reduction active member 2 away from the primary reduction follower 1) continues to work and applies pressure F to the secondary reduction active member 2. Since the force is mutual, the secondary reduction active member 2 will reversely apply a holding pressure F1 to the protrusion 22, and the holding pressure acts on the side surface of the protrusion 22 facing the transmission tooth 211. Since the energy absorption structure 221 is arranged between the protrusion 22 and the primary reduction follower 1, the force between the primary reduction follower 1 and the protrusion 22 can be absorbed by the energy absorption structure 221 (wherein the force can be the force transmitted to the primary reduction follower 1 by the pressure head through the secondary reduction active member 2, or it can be the holding pressure transmitted to the protrusion 22 by the primary reduction follower 1), thereby reducing the holding pressure transmitted to the transmission tooth 211 to a certain extent, and protecting the transmission tooth 211 to a certain extent.
[0051] Exemplarily, an external spline 23 is also provided on the outer peripheral wall of the intermediate shaft 21, and the external spline 23 is located on the side of the protrusion 22 away from the transmission tooth 211, and an internal spline 11 is provided on the primary reduction follower 1. The secondary reduction active component 2 can move toward the direction close to the primary reduction follower 1 when being pressed, so that the internal spline 11 and the external spline 23 are spline-matched, thereby realizing the connection between the primary reduction follower 1 and the secondary reduction active component 2.
[0052] In some embodiments, reference Figures 4 to 7 As shown, the energy absorption groove is specifically provided on the outer peripheral wall of the protrusion 22 .
[0053] In this way, when the primary reduction follower 1 exerts a holding pressure F1 on the protrusion 22, the side of the energy absorption groove facing the primary reduction follower 1 will deform along the axial direction of the intermediate shaft assembly 10 close to the transmission tooth 211, and the groove wall on the deformed side will apply a holding pressure balance force F2 from the groove bottom of the energy absorption groove to the primary reduction follower 1, and the primary reduction follower 1 will then apply a reverse force F3 of the holding pressure balance force to the protrusion 22. In other words, compared with the solution without the energy absorption groove, this embodiment can, by such a configuration, to a certain extent move the force transmitted from the primary reduction follower 1 to the secondary reduction active member 2 inward in the direction away from the tooth top circle of the transmission tooth 211, so as to cut off the path transmitted from the primary reduction active member to the transmission tooth 211 to a certain extent, and further improve the press-fit deformation of the transmission tooth 211.
[0054] For example, an energy absorbing groove with a width of 1 mm may be provided on the protrusion 22 .
[0055] Exemplarily, the primary reduction driven member 1 has a mating surface 12 facing the protrusion 22 , and specifically, the mating surface 12 can be in contact with the protrusion 22 .
[0056] Of course, in other embodiments, the energy absorbing groove may also be arranged on the side of the primary reduction driven component 1 facing the secondary reduction active component 2 .
[0057] In some embodiments, reference Figure 3 to Figure 4 As shown, the protrusion 22 is extended along the circumference of the intermediate shaft 21. This arrangement can increase the press-fitting area of the protrusion 22 and the primary reduction driven component 1, thereby ensuring the reliability of the press-fitting connection between the primary reduction driven component 1 and the secondary reduction active component 2.
[0058] In some embodiments, reference Figure 3 to Figure 4 As shown, the energy absorption groove is extended along the circumference of the protrusion 22, so that the holding pressure can be absorbed from multiple positions of the protrusion 22, and the path for the holding pressure at multiple positions to be transmitted to the transmission tooth 211 can be cut off, thereby effectively protecting the transmission tooth 211 in the circumferential direction of the transmission tooth 211.
[0059] In some embodiments, the outer contour edge of the protrusion 22 is located in the space defined by the addendum circle and the root circle of the transmission tooth 211. Alternatively, in other embodiments, the outer contour edge of the protrusion 22 is located inside the root circle of the transmission tooth 211 and is disposed close to the root circle.
[0060] In this way, the fitting area between the protrusion 22 and the primary reduction follower 1 after being pressed into place can be improved to a certain extent, thereby ensuring the reliability and stability of the two after being connected in place. In addition, through the arrangement of the above-mentioned energy absorption structure 221, it is possible to avoid to a certain extent the situation in which the holding pressure exerted on the protrusion 22 is transmitted to the transmission tooth 211 through the protrusion 22 and damages the transmission tooth 211, thereby providing good protection for the transmission tooth 211.
[0061] In some embodiments, in the radial direction of the secondary deceleration active component 2, the inner bottom wall 223 of the energy absorption groove is located on the inner side of the root circle of the transmission tooth 211. Figure 4 Z direction shown.
[0062] Through the above arrangement, the reaction force of the holding pressure balancing force transmitted from the first-stage reduction follower 1 to the protrusion 22 can be transmitted to the outside of the transmission tooth 211, which is beneficial to ensure that the transmission path from the holding pressure to the transmission tooth 211 is cut off, further reducing the deformation of the transmission tooth 211.
[0063] In some embodiments, reference Figure 5 As shown, the energy absorption groove includes two inner side walls 222 spaced apart along the rotation axis of the secondary deceleration active member 2 and an inner bottom wall 223 connected between the two inner side walls 222. The junctions between the inner side walls 222 and the inner bottom wall 223 are smoothly transitioned.
[0064] Such arrangement can, to a certain extent, avoid the occurrence of stress concentration at the junction of each inner side wall 222 and the inner bottom wall 223, thereby being beneficial to improving the structural strength of each groove wall in the entire energy absorption groove, and further being beneficial to improving the absorption effect of the energy absorption groove on the holding pressure, and providing better protection for the transmission tooth 211.
[0065] This embodiment also provides a vehicle transmission system, including a reducer device 100 .
[0066] The specific structure and implementation principle of the reducer device 100 in this embodiment are the same as those of the reducer device 100 provided in the above embodiment, and can bring the same or similar technical effects. For details, please refer to the description of the above embodiment.
[0067] This embodiment also provides a vehicle, including a vehicle transmission system.
[0068] The specific structure and implementation principle of the vehicle transmission system in this embodiment are the same as those of the vehicle transmission system provided in the above embodiments, and can bring the same or similar technical effects. For details, please refer to the description of the above embodiments.
[0069] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0070] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.
Claims
1. A reducer device, characterized in that: It includes an intermediate shaft assembly; the intermediate shaft assembly includes a primary speed reduction driven member and a secondary speed reduction active member, and the outer periphery of the secondary speed reduction active member has transmission teeth; The primary reduction driven member is connected to one axial side of the secondary reduction active member by a press-fitting method, and the primary reduction driven member can be fitted with the secondary reduction active member after being connected to the secondary reduction active member in place; An energy absorbing structure is provided between the primary reduction follower and the transmission tooth. The energy absorbing structure is used to absorb the force between the primary reduction follower and the transmission tooth when the press-fitting is continued after the secondary reduction active member is fitted with the primary reduction follower, so as to reduce at least part of the holding pressure transmitted to the transmission tooth.
2. The reducer device according to claim 1, characterized in that: The energy absorption structure comprises an energy absorption groove provided between the primary reduction driven member and the secondary reduction active member, wherein the energy absorption groove extends radially along the intermediate shaft structure and the groove faces outwards; Along the rotation axis of the intermediate shaft assembly, the energy absorption groove is located beside the transmission tooth, and at least a portion of the projection of the energy absorption groove on the transmission tooth coincides with the transmission tooth; The side groove wall of the energy absorbing groove may be deformed under the action force between the primary reduction follower and the transmission tooth to absorb at least part of the holding force.
3. The reducer device according to claim 1, characterized in that: The secondary speed reduction active component comprises an intermediate shaft and a protrusion arranged in the circumferential direction of the intermediate shaft; The transmission tooth is located on the intermediate shaft, and the protrusion is located between the transmission tooth and the primary reduction driven member, and can be fitted with the primary reduction driven member; The outer edge of the protrusion is located on the inner side of the tooth top circle of the transmission tooth, and the energy absorption structure is located between the protrusion and the primary reduction driven member.
4. The reducer device according to claim 3, characterized in that: The energy absorbing structure comprises an energy absorbing groove which is opened on the outer peripheral wall of the protrusion and has an outward notch.
5. The reducer device according to claim 4, characterized in that: The protrusion is extended along the circumference of the intermediate shaft; The energy absorbing groove is extended along the circumference of the protrusion.
6. The reducer device according to any one of claims 3 to 5, characterized in that: The outer contour edge of the protrusion is located in the space defined by the addendum circle and the root circle of the transmission tooth; Alternatively, the outer contour edge of the protrusion is located on the inner side of the root circle of the transmission tooth and is arranged close to the root circle.
7. The reducer device according to claim 2 or 4, characterized in that: In the radial direction of the secondary speed reduction active component, the inner bottom wall of the energy absorption groove is located on the inner side of the root circle of the transmission tooth.
8. The reducer device according to claim 2 or 4, characterized in that: The energy absorption groove comprises two inner side walls spaced apart along the rotation axis of the secondary deceleration active component and an inner bottom wall connected between the two inner side walls; the junctions between the inner side walls and the inner bottom wall are smoothly transitioned.
9. A vehicle transmission system, characterized in that: Comprising a reducer device as claimed in any one of claims 1 to 8.
10. A vehicle, characterized in that: Comprising the vehicle transmission system as claimed in claim 9.