Gear selection and shifting actuator for transmission and transmission

Abstract

The present invention proposes a gear selection and shifting actuator for a transmission, the gear selection and shifting actuator comprises a shift shaft, at least two shift forks and a gear selection and shifting assembly, the gear selection and shifting assembly is used to select one of the at least two shift forks and enable the selected shift fork to be driven by the shift shaft to perform gear shifting, wherein the gear selection and shifting assembly at least comprises: a sliding sleeve, the sliding sleeve at least partially surrounds the shift shaft and is arranged to be able to rotate around the shift shaft, the sliding sleeve has a moving groove extending in the axial direction of the shift shaft; and a shift finger, the shift finger cooperates with the shift shaft so that the shift finger can rotate relative to the shift shaft and can be driven by the shift shaft to move in the axial direction, wherein the shift finger is at least partially arranged in the moving groove so that the shift finger cannot rotate relative to the sliding sleeve but can move in the moving groove relative to the sliding sleeve in the axial direction. The present invention also proposes a transmission. With the help of the present invention, the gear selection and shifting actuator can be made compact and reliable.

Description

Technical Field

[0001] The invention relates to a gear selection and shifting actuator for a transmission and a transmission. Background Art

[0002] The automatic mechanical transmission (AMT) is an improvement on the traditional manual gear transmission. It not only retains the advantages of high efficiency and low cost of the original gear transmission, but also has all the advantages of automatic transmission with automatic shifting. It is popular among drivers for its unique economy, convenience, safety and comfort. The gear selection and shifting actuator of the automatic mechanical transmission is an important aspect that affects its performance.

[0003] However, the currently known gear selection and shifting actuators have the disadvantages of complex structure, large size and low reliability. Summary of the invention

[0004] The object of the present invention is to provide an improved gear selection and shifting actuator for a transmission and an improved transmission, so that the gear selection and shifting actuator has a compact and reliable structure.

[0005] According to a first aspect of the present invention, a gear selection and shifting actuator for a transmission is provided, the gear selection and shifting actuator comprising a shift shaft, at least two shift forks and a gear selection and shifting assembly, the gear selection and shifting assembly being used to select one of the at least two shift forks and enable the selected shift fork to be driven by the shift shaft to perform gear shifting, wherein the gear selection and shifting assembly at least comprises: a sliding sleeve, the sliding sleeve at least partially surrounds the shift shaft and is arranged to be able to rotate around the shift shaft, the sliding sleeve having a movable groove extending in an axial direction of the shift shaft; and a shift finger, the shift finger cooperates with the shift shaft so that the shift finger can rotate relative to the shift shaft and can be driven by the shift shaft to move in an axial direction, wherein the shift finger is at least partially arranged in the movable groove so that the shift finger cannot rotate relative to the sliding sleeve but can move in the movable groove in an axial direction relative to the sliding sleeve.

[0006] Herein, if not otherwise specified, “axial direction” refers to the axial direction of the shift shaft, “radial direction” refers to the radial direction relative to the shift shaft, and “circumferential direction” refers to the circumferential direction relative to the shift shaft, i.e., the direction surrounding the axial direction of the shift shaft.

[0007] According to an exemplary embodiment of the present invention, the moving groove penetrates the sliding sleeve along the radial direction of the shift shaft.

[0008] According to an exemplary embodiment of the present invention, the shift finger has a shift finger neutral position in the axial direction. When the shift finger is in the shift finger neutral position, the sliding sleeve can rotate around the shift shaft to at least two gear selection angle positions, and the number of the gear selection angle positions corresponds to the number of shift forks. When the sliding sleeve rotates to one of the at least two gear selection angle positions, the shift finger cooperates with a corresponding one of the at least two shift forks, so that the corresponding shift fork can move in the axial direction together with the shift finger, and the corresponding shift fork is the selected shift fork.

[0009] According to an exemplary embodiment of the present invention, the shift finger has at least one shift finger shift position in the axial direction. When the shift finger cooperates with the selected shift fork, the shift finger can be moved from the finger neutral position to the finger shift position in the axial direction under the drive of the shift shaft, and the selected shift fork can be moved in the axial direction to the corresponding shift fork shift position.

[0010] According to an exemplary embodiment of the present invention, the shift finger has a first surrounding portion at least partially surrounding the shift shaft and a first radially extending portion extending in a radial direction of the shift shaft.

[0011] According to an exemplary embodiment of the present invention, a shift fork includes: a shift fork body; a shift fork ring, which is formed at one end of the shift fork body and at least partially surrounds the shift shaft; and a shift fork pull plate, which extends from the shift fork body in an axial direction, and the shift fork pull plate has a finger matching structure that matches with the shift finger at a side facing the shift shaft.

[0012] According to an exemplary embodiment of the present invention, the shift finger matching structure of the shift fork pull plate includes a pull plate groove, which penetrates the shift fork pull plate along the circumferential direction of the shift shaft, and the shift fork pull plate is arranged so that when the sliding sleeve rotates to one of the at least two gear selection angle positions, the shift finger can extend into the pull plate groove of the selected shift fork.

[0013] According to an exemplary embodiment of the present invention, the shift fork pulling plates of the at least two shift forks are arranged at different circumferential positions relative to the shift shaft.

[0014] According to an exemplary embodiment of the present invention, the sliding sleeve has a sliding sleeve boss protruding outward in the radial direction on the axial section where the movement groove is formed, wherein the sliding sleeve boss partially surrounds the shift shaft in the circumferential direction.

[0015] According to an exemplary embodiment of the present invention, the sliding sleeve boss is configured to be able to extend into a pull plate groove of an unselected shift fork.

[0016] According to an exemplary embodiment of the present invention, the thickness of the sliding sleeve boss and the shift finger along the axial direction is respectively less than or equal to the width of the pull plate groove along the axial direction.

[0017] According to an exemplary embodiment of the present invention, the sliding sleeve has an axial locking structure, and the axial locking structure cooperates with the transmission housing so that the sliding sleeve is fixed in the axial direction but can rotate around the shift shaft.

[0018] According to an exemplary embodiment of the present invention, the axial locking structure includes a locking groove located at an outer circumferential surface of the sliding sleeve, and the locking groove is configured to be able to cooperate with a locking pin fixed to the transmission housing.

[0019] According to an exemplary embodiment of the present invention, the locking groove at least partially extends in the circumferential direction, so that the locking groove cooperates with at least two locking pins located on both sides of the shift shaft.

[0020] According to an exemplary embodiment of the present invention, the locking groove is formed on the outer circumferential surface of the sliding sleeve boss.

[0021] According to an exemplary embodiment of the present invention, the shift assembly further comprises a sensor bracket, a sensor for detecting the position of the shift finger is at least partially fixed to the sensor bracket, wherein the sensor bracket is at least partially arranged in the moving groove so that the sensor bracket and the sliding sleeve cannot rotate relative to each other, and the sensor bracket is arranged so that the sensor bracket and the shift finger are fixed to each other in the axial direction. It should be understood that in this article, the two are "fixed to each other in the axial direction" means that the two cannot move relative to each other along the axial direction, but does not limit the movement relationship along other directions.

[0022] According to an exemplary embodiment of the present invention, the sensor holder has a second surrounding portion at least partially surrounding the shift shaft and a second radially extending portion extending in a radial direction of the shift shaft.

[0023] According to an exemplary embodiment of the present invention, the first surrounding portion has a first matching structure, and the second surrounding portion has a second matching structure, and the first matching structure matches with the second matching structure so that the finger and the sensor bracket are fixed to each other in the axial direction.

[0024] According to an exemplary embodiment of the present invention, the shift selector assembly further comprises a fixing device fixed to the transmission housing, and the sliding sleeve cooperates with the fixing device so that the sliding sleeve can rotate relative to the fixing device.

[0025] According to an exemplary embodiment of the present invention, the gear selection and shifting assembly also includes a gear selection self-locking device installed on the fixing device, and the sliding sleeve has a gear selection self-locking surface on the side facing the gear selection self-locking device, and the gear selection self-locking structure is formed at the gear selection self-locking surface, so that when the sliding sleeve rotates to one of the at least two gear selection angle positions, the gear selection self-locking structure and the gear selection self-locking device are locked with each other and provide a force to prevent the rotation of the sliding sleeve.

[0026] According to an exemplary embodiment of the present invention, the gear selection self-locking device includes a first elastic member and a first self-locking block pressed by the first elastic member toward the gear selection self-locking surface, wherein the first self-locking block has a convex curved surface toward the gear selection self-locking surface.

[0027] According to an exemplary embodiment of the present invention, the gear selection self-locking structure includes at least two self-locking recesses, and the self-locking recesses can at least partially accommodate the first self-locking block.

[0028] According to an exemplary embodiment of the present invention, the number of the self-locking recesses is consistent with the number of the shift forks; and / or the distances between the at least two self-locking recesses and the shift shaft are equal.

[0029] According to an exemplary embodiment of the present invention, the shift selector assembly further comprises a shift selector shaft fixed to the sliding sleeve, wherein the shift selector shaft is configured to be driven to rotate the sliding sleeve around the shift shaft.

[0030] According to an exemplary embodiment of the present invention, the shift selector shaft extends in the axial direction of the shift shaft.

[0031] According to an exemplary embodiment of the present invention, the shift actuator includes a shift fork self-locking device, the shift fork includes a shift fork self-locking structure, and the shift fork self-locking device and the shift fork self-locking structure are configured so that when the shift fork is located at at least two shift fork self-locking positions in the axial direction, the shift fork self-locking device and the shift fork self-locking structure lock with each other and provide a force that prevents the shift fork from moving in the axial direction.

[0032] According to an exemplary embodiment of the present invention, the at least two shift fork self-locking positions include: a shift fork stand-by position, when the shift fork is in the shift fork stand-by position, the shift fork can be selected by the shift selection assembly; and at least one shift fork shift position, when the shift fork is selected and moved along the axial position to the shift fork shift position, shifting is achieved.

[0033] According to an exemplary embodiment of the present invention, the fork self-locking device includes a second elastic member and a second self-locking block pressed by the second elastic member toward the fork self-locking structure, wherein the second self-locking block has a curved surface convex toward the fork self-locking structure.

[0034] According to an exemplary embodiment of the present invention, the shift fork self-locking structure is formed on the shift fork ring.

[0035] According to an exemplary embodiment of the present invention, the shift fork self-locking device is directly or indirectly fixed to the transmission housing.

[0036] According to an exemplary embodiment of the present invention, the rotation of the sliding sleeve and / or the movement of the shift shaft are driven by a pneumatic drive device.

[0037] According to a second aspect of the present invention, a transmission is provided, wherein the transmission comprises the gear selection and shifting actuator according to the present invention.

[0038] The positive effect of the present invention is that the shift actuator for a transmission and the transmission according to the present invention respectively make the shift actuator and the transmission more compact in structure and more reliable in function. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be described in more detail below with reference to the accompanying drawings, so that the principles, features and advantages of the present invention can be better understood. The accompanying drawings include:

[0040] Figure 1 A schematic partial perspective view of a gear selection and shifting actuator according to an exemplary embodiment of the present invention is shown;

[0041] Figure 2 A schematic partial cross-sectional view of a gear selection and shifting actuator according to an exemplary embodiment of the present invention is shown;

[0042] Figure 3A , 3B and 3C schematically illustrate a first finger shift position, a finger neutral position, and a second finger shift position of a finger according to an exemplary embodiment of the present invention;

[0043] Figure 4 shows a schematic perspective view of a sliding sleeve according to an exemplary embodiment of the present invention;

[0044] Figure 5 shows a finger according to an exemplary embodiment of the present invention;

[0045] Figure 6 shows a sensor bracket according to an exemplary embodiment of the present invention; and

[0046] Figure 7 The schematic diagram shows that the selector shaft is driven and the sliding sleeve is in three different angular positions. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the scope of protection of the present invention.

[0048] Figure 1 A schematic partial perspective view of a shift selector actuator according to an exemplary embodiment of the present invention is shown. Figure 2A schematic partial cross-sectional view of a shift selector actuator according to an exemplary embodiment of the present invention is shown. The shift selector actuator is used in a transmission, in particular in a mechanical automatic transmission.

[0049] Combine the following Figure 1 and Figure 2 The gear selection and shifting actuator according to an exemplary embodiment of the present invention is described. The gear selection and shifting actuator includes a shift shaft 100, at least two shift forks 200, and a gear selection and shifting assembly 300. The gear selection and shifting assembly 300 is used to select one of the at least two shift forks 200 and enable the selected shift fork 200 to be driven by the shift shaft 100 to perform gear shifting. The gear selection and shifting assembly 300 at least includes: a sliding sleeve 302, the sliding sleeve 302 at least partially surrounds the shift shaft 100 and is arranged to be able to rotate around the shift shaft 100, and the sliding sleeve 302 has a moving groove 3022 extending in the axial direction of the shift shaft 100 (see Figure 4 );and a shift finger 304, wherein the shift finger 304 cooperates with the shift shaft 100 so that the shift finger 304 can rotate relative to the shift shaft 100 and can be driven by the shift shaft 100 to move in an axial direction, wherein the shift finger 304 is at least partially arranged in the movable groove 3022 so that the shift finger 304 cannot rotate relative to the sliding sleeve 302 but can move in the movable groove 3022 relative to the sliding sleeve 302 in an axial direction.

[0050] The shift and selection actuator according to the present invention can realize stable gear selection and shifting functions, and make the shift and selection actuator compact in structure, thereby reducing the required installation space.

[0051] The gear selection and shifting assembly 300 may further include a sliding bearing 306 , for example, and the sliding sleeve 302 may cooperate with the gear shifting shaft 100 via the sliding bearing 306 .

[0052] The shift finger 304 may have a shift finger neutral position in the axial direction. When the shift finger 304 is in the shift finger neutral position, the sleeve 302 can rotate around the shift shaft 100 to at least two shift angle positions. The number of shift angle positions may correspond to the number of shift forks 200. In this embodiment, the shifting actuator includes three shift forks 200: a first shift fork 200a, a second shift fork 200b, and a third shift fork 200 (for clarity, the third shift fork 200 is not shown in the figure). Figure 1 and Figure 2 ). Accordingly, the at least two gear selection angle positions may be three gear selection angle positions. It should be understood that other numbers of shift forks 200 and gear selection angle positions are also feasible.

[0053] When the sliding sleeve 302 rotates to one of the at least two gear selection angle positions, the shift finger 304 cooperates with a corresponding shift fork 200 of the at least two shift forks 200, so that the corresponding shift fork 200 can move along the axial direction together with the shift finger 304, and the corresponding shift fork 200 is the selected shift fork 200. Figure 2 The figure shows the situation that the second shift fork 200b is the selected shift fork 200, and here, the shift finger 304 cooperates with the second shift fork 200b.

[0054] The finger 304 may have at least one finger shift position in the axial direction. When the finger 304 cooperates with the selected fork 200, the finger 304 can be driven by the shift shaft 100 to move from the finger neutral position to the finger shift position in the axial direction, and move the selected fork 200 in the axial direction to the corresponding fork shift position to achieve shifting. The at least one finger shift position is, for example, two finger shift positions including a first finger shift position and a second finger shift position. Accordingly, each fork 200 has two fork shift positions including a first fork shift position and a second fork shift position. Figure 2 The second shift fork 200b is shown moved to the first fork shift position of the second shift fork 200b.

[0055] Figure 3A , 3B 3C schematically illustrate a first finger shift position, a finger neutral position, and a second finger shift position of a finger 304 according to an exemplary embodiment of the present invention. Figure 3B It shows that the shift finger 304 is in the shift finger neutral position. Here, the sleeve 302 rotates around the shift shaft 100 to the shift angle position corresponding to the second shift fork 200b, and the shift finger 304 cooperates with the second shift fork 200b. At this time, the second shift fork 200b becomes the selected shift fork 200. The unselected shift fork 200 can cooperate with the sleeve 302, so that the unselected shift fork 200 cannot move in the axial direction relative to the sleeve 302. The shift shaft 100 can move in the axial direction and cause the shift finger 304 and then the second shift fork 200b to move in the axial direction together. The shift fork 200 can move along the first axial direction with the shift shaft 100 to the first shift fork shift position, as shown in FIG. Figure 3A The shift fork 200 can move along with the shift shaft 100 in a second axial direction opposite to the first axial direction to a second shift fork shift position, as shown in FIG. Figure 3C The shift shaft 100 can be driven by a pneumatic drive device, such as a cylinder assembly. It should be understood that the shift shaft 100 can also be driven by other means, such as a motor or a hydraulic drive device.

[0056] Now back to Figure 1 and Figure 2. According to an exemplary embodiment of the present invention, the shift fork 200 may include: a shift fork body 202; a shift fork ring 204, wherein the shift fork ring 204 is formed at one end of the shift fork body 202 and at least partially surrounds the shift shaft 100; and a shift fork pull plate 206, wherein the shift fork ring 204 extends from the shift fork body 202 in the axial direction, and the shift fork pull plate 206 has a shift finger mating structure mating with the shift finger 304 at a side facing the shift shaft 100. The shift fork pull plate 206 may extend from the shift fork body 202 in the direction of the shift selection assembly 300, and is arranged at a position radially outward relative to the shift selection assembly 300. Figure 1 As shown, the fork pull plates 206 of the at least two shift forks 200 are arranged at different circumferential positions relative to the shift shaft 100 .

[0057] like Figure 2 As shown, the shift finger matching structure of the shift fork pull plate 206 may include a pull plate groove 2062, and the pull plate groove 2062 penetrates the shift fork pull plate 206 along the circumferential direction of the shift shaft 100. The shift fork pull plate 206 is arranged so that when the sliding sleeve 302 rotates to one of the at least two gear selection angle positions, the shift finger 304 extends into the pull plate groove 2062 of the selected shift fork 200. Thus, the matching between the shift finger 304 and the shift fork 200 can be formed in a simple and stable manner, so that the shift finger 304 can rotate relative to the shift fork 200 and can move axially together with the shift fork 200.

[0058] The thickness of the finger 304 along the axial direction may be, for example, less than or equal to the width of the pull plate groove 2062 along the axial direction. Figure 2 It is shown that the shift finger 304 extends into the pull plate slot 2062 of the second shift fork 200b.

[0059] It should be understood that the shift fork pull plate 206 may alternatively or additionally include other forms of finger matching structures, such as a protrusion protruding from the shift fork pull plate 206. Accordingly, the shift finger 304 may have a matching matching structure, such as a recess corresponding to the protrusion.

[0060] Figure 4 FIG. 2 shows a schematic perspective view of a sliding sleeve 302 according to an exemplary embodiment of the present invention. Figure 4 As shown, the sliding sleeve 302 may be roughly configured into a cylindrical shape, and the axial direction of the cylinder is arranged to coincide with the axial direction of the shift shaft 100. The sliding sleeve 302 may have a moving groove 3022 that penetrates the sliding sleeve 302 in the radial direction. The moving groove 3022 divides the axial section of the sliding sleeve 302 provided with the moving groove 3022 into two semicircular parts. Of course, the moving groove 3022 may also be formed in the sliding sleeve 302 in other ways. For example, the moving groove 3022 may not extend in the radial direction. The moving groove 3022 may also not penetrate the sliding sleeve 302 in a cross section perpendicular to the axial direction.

[0061] The sliding sleeve 302 may have a sliding sleeve boss 3024 protruding outward in the radial direction on the axial section where the moving groove 3022 is formed, wherein the sliding sleeve boss 3024 partially surrounds the shift shaft 100 in the circumferential direction. The sliding sleeve boss 3024 may be configured to block the unselected shift fork 200 to prevent the unselected shift fork 200 from moving in the axial direction. The sliding sleeve boss 3024 may be configured to extend into the pull plate groove 2062 of the shift fork 200, especially the unselected shift fork 200. The thickness of the sliding sleeve boss 3024 in the axial direction may be less than or equal to the width of the pull plate groove 2062 in the axial direction. The thickness of the sliding sleeve boss 3024 in the axial direction may be substantially equal to the thickness of the shift finger 304 in the axial direction. The sliding sleeve boss 3024, the shift finger 304 and the shift fork pull plate 206 according to the present invention are conducive to realizing reliable gear selection and shifting with a particularly compact structure.

[0062] When the finger 304 leaves the neutral position, the sliding sleeve boss 3024 (at Figure 2 The shift fork 200 is blocked by the sliding sleeve 302 , so that the sliding sleeve 302 cannot rotate around the shift shaft 100 .

[0063] The sliding sleeve 302 may have an axial locking structure, which cooperates with the transmission housing (not shown in the figure) so that the sliding sleeve 302 is fixed in the axial direction but can rotate around the shift shaft 100. The axial locking structure, for example, includes a locking groove 3026 located on the outer circumferential surface of the sliding sleeve 302, and the locking groove 3026 is configured to be able to engage with a locking pin 308 (see FIG. 1 ) fixed to the transmission housing. Figure 7 ). The locking groove 3026 may have a curved concave surface, and the concave surface may be formed to adapt to the shape of the locking pin 308. The locking groove 3026 may at least partially extend in the circumferential direction, so that the locking groove 3026 cooperates with at least two locking pins 308 located on both sides of the shift shaft 100, which is conducive to achieving stable locking. The locking groove 3026 may be formed on the outer circumferential surface of the sliding sleeve boss 3024. As a result, the structure of the shift mechanism can be made more compact.

[0064] Figure 5 The finger 304 according to an exemplary embodiment of the present invention is shown. The finger 304 may have a first surrounding portion 3042 at least partially surrounding the shift shaft 100 and a first radially extending portion 3044 extending in the radial direction of the shift shaft 100 .

[0065] According to an exemplary embodiment of the present invention, the shift assembly 300 may further include a sensor bracket 310. A sensor for detecting the position of the finger 304 is at least partially fixed to the sensor bracket 310. The sensor bracket 310 is at least partially arranged in the moving groove 3022 so that the sensor bracket 310 and the sliding sleeve 302 cannot rotate relative to each other, and the sensor bracket 310 is arranged so that the sensor bracket 310 and the finger 304 are fixed to each other in the axial direction.

[0066] Figure 6 The sensor bracket 310 according to an exemplary embodiment of the present invention is shown in FIG. The sensor bracket 310 has a second surrounding portion 3102 at least partially surrounding the shift shaft 100 and a second radially extending portion 3104 extending in the radial direction of the shift shaft 100 .

[0067] like Figure 5 and Figure 6 As shown, in one embodiment of the present invention, the first surrounding portion 3042 of the finger 304 has a first matching structure 3046, and the second surrounding portion 3102 of the sensor bracket 310 has a second matching structure 3106. The first matching structure 3046 matches with the second matching structure 3106, so that the finger 304 and the sensor bracket 310 are fixed to each other in the axial direction. The first matching structure 3046 and the second matching structure 3106 can be respectively configured into concave and convex shapes that match each other.

[0068] The shift shaft 100 may have a first shift shaft groove, into which the finger 304, in particular the first surrounding portion 3042 of the finger 304, fits. Alternatively or additionally, the shift shaft 100 may have a second shift shaft groove, into which the sensor bracket 310, in particular the second surrounding portion 3102 of the sensor bracket 310 fits.

[0069] The shift shaft 100 may have a shift shaft groove 102 surrounding the entire circumference of the shift shaft 100 in the circumferential direction, and the shift finger 304 and the sensor bracket 310 are fitted into the shift shaft groove 102 .

[0070] Back again Figure 1 and Figure 2 In an exemplary embodiment of the present invention, the shift assembly 300 further includes a fixing device 312 fixed to the transmission housing, and the sleeve 302 cooperates with the fixing device 312 so that the sleeve 302 can rotate relative to the fixing device 312. The sleeve 302 cooperates with the fixing device 312, for example, through a sliding bearing.

[0071] The gear selection and shifting assembly 300 further includes, for example, a gear selection self-locking device 314 mounted on the fixing device 312, and the sliding sleeve 302 has a gear selection self-locking surface 3028 on the side facing the gear selection self-locking device 314, and the gear selection self-locking structure is formed at the gear selection self-locking surface 3028, so that when the sliding sleeve 302 rotates to one of the at least two gear selection angle positions, the gear selection self-locking structure and the gear selection self-locking device 314 are locked with each other and provide a force that hinders the rotation of the sliding sleeve 302. In this way, the sliding sleeve 302 can be accurately positioned. The sliding sleeve 302 can be reliably maintained at a desired angular position. This is particularly advantageous when the sliding sleeve 302 is driven to rotate in a pneumatic manner.

[0072] The gear selection self-locking device 314 may, for example, include a first elastic member and a first self-locking block pressed by the first elastic member toward the gear selection self-locking surface 3028, wherein the first self-locking block has a convex curved surface toward the gear selection self-locking surface 3028. The first elastic member is, for example, a coil spring. The first self-locking block is, for example, spherical. The gear selection self-locking structure may include at least two self-locking recesses, which can at least partially accommodate the first self-locking block. The number of self-locking recesses may be consistent with the number of shift forks 200. The at least two self-locking recesses may be formed to be equidistant from the shift shaft 100.

[0073] The shift selector assembly 300 may further include a shift selector shaft 316 fixed to the sleeve 302, wherein the shift selector shaft 316 is configured to be driven to rotate the sleeve 302 around the shift shaft 100. The shift selector shaft 316, for example, extends in the axial direction of the shift shaft 100. The shift selector shaft 316 may be driven by a pneumatic drive device, for example, by a cylinder assembly. It should be understood that the shift selector shaft 316 may also be driven by other means, for example, by a motor or a hydraulic drive device. Figure 7 It is schematically shown that the shift lever shaft 316 is driven and causes the sliding sleeve 302 to be in three different angular positions.

[0074] The shifting actuator may further include a fork self-locking device 400. The fork 200 includes a fork self-locking structure 208 accordingly. The fork self-locking device 400 and the fork self-locking structure 208 are configured so that when the fork 200 is located at least two fork self-locking positions in the axial direction, the fork self-locking device 400 and the fork self-locking structure 208 can lock with each other and provide a force that hinders the fork 200 from moving in the axial direction. The at least two fork self-locking positions may include: a fork waiting position, when the fork 200 is in the fork waiting position, the fork 200 can be selected by the shifting assembly 300; and at least one fork shifting position. The fork waiting position corresponds to the shift finger neutral position. For example, when the fork 200 is in the fork waiting position, the pull plate groove 2062 of the fork 200 is in the same axial position as the shift finger 304 located in the shift finger neutral position and / or the sliding sleeve boss 3024.

[0075] The fork self-locking device 400 includes, for example, a second elastic member 402 and a second self-locking block 404 pressed by the second elastic member 402 toward the fork self-locking structure 208, wherein the second self-locking block 404 has a curved surface convex toward the fork self-locking structure 208. The second elastic member 402 is, for example, a coil spring. The second self-locking block 404 is, for example, spherical. The fork self-locking device 400 can be fixed to the transmission housing directly or indirectly. The fork self-locking structure 208 can be formed on the fork ring 204. Figure 3C As shown, the shift fork self-locking structure 208 may have a double-hump shape, for example.

[0076] Although specific embodiments of the present invention are described in detail herein, they are provided for the purpose of explanation only and should not be considered to limit the scope of the present invention. Various substitutions, changes and modifications may be conceived without departing from the spirit and scope of the present invention.

[0077] Reference numerals list

[0078] 100 Shift shaft

[0079] 102 Shift shaft groove

[0080] 200 Fork

[0081] 200a First fork

[0082] 200b Second fork

[0083] 202 Fork body

[0084] 204 Fork Ring

[0085] 206 Fork pull plate

[0086] 2062 Pull plate slot

[0087] 208 Fork self-locking structure

[0088] 300 Shift selector kit

[0089] 302 Sliding Bushing

[0090] 3022 Mobile Slot

[0091] 3024 Sliding boss

[0092] 3026 Locking groove

[0093] 3028 gear selection self-locking surface

[0094] 304 Finger

[0095] 3042 First Surrounding Part

[0096] 3044 First radial extension

[0097] 3046 First Matching Structure

[0098] 306 Sliding bearing

[0099] 308 Locking pin

[0100] 310 Sensor bracket

[0101] 3102 Second surround

[0102] 3104 Second radial extension

[0103] 3106 Second matching structure

[0104] 312 Fixtures

[0105] 314 gear selection self-locking device

[0106] 316 Shift lever

[0107] 400 Fork self-locking device

[0108] 402 second elastic member

[0109] 404 Second self-locking block

Claims

1. A gear selection and shifting actuator for a transmission, the gear selection and shifting actuator comprising a gear shifting shaft (100), at least two shift forks (200) and a gear selection and shifting assembly (300), the gear selection and shifting assembly (300) being used to select one of the at least two shift forks (200) and enable the selected shift fork (200) to be driven by the gear shifting shaft (100) to perform gear shifting, wherein: The gear selection and shifting assembly (300) at least comprises: a sliding sleeve (302), the sliding sleeve (302) at least partially surrounding the shift shaft (100) and arranged to be rotatable around the shift shaft (100), the sliding sleeve (302) having a moving groove (3022) extending in the axial direction of the shift shaft (100); and A shift finger (304) is matched with a shift shaft (100) so that the shift finger (304) can rotate relative to the shift shaft (100) and can be driven by the shift shaft (100) to move in an axial direction, wherein the shift finger (304) is at least partially arranged in a movable groove (3022) so that the shift finger (304) cannot rotate relative to the sliding sleeve (302) but can move in the movable groove (3022) relative to the sliding sleeve (302) in an axial direction, The gear selection and shifting assembly (300) further comprises a sensor bracket (310), and a sensor for detecting the position of the shift finger (304) is at least partially fixed to the sensor bracket (310), wherein the sensor bracket (310) is at least partially arranged in the movable groove (3022) so that the sensor bracket (310) and the sliding sleeve (302) cannot rotate relative to each other, and the sensor bracket (310) is arranged so that the sensor bracket (310) and the shift finger (304) are fixed to each other in the axial direction.

2. The gear selection and shifting actuator according to claim 1, wherein: The moving groove (3022) penetrates the sliding sleeve (302) along the radial direction of the shift shaft (100).

3. The gear selection and shifting actuator according to claim 1, wherein: The shift finger (304) has a shift finger neutral position in the axial direction. When the shift finger (304) is in the shift finger neutral position, the sliding sleeve (302) can rotate around the shift shaft (100) to at least two shift selection angle positions, and the number of the shift selection angle positions corresponds to the number of shift forks (200). When the sliding sleeve (302) rotates to one of the at least two shift selection angle positions, the shift finger (304) cooperates with a corresponding shift fork (200) of the at least two shift forks (200), so that the corresponding shift fork (200) can move along the axial direction together with the shift finger (304), and the corresponding shift fork (200) is the selected shift fork (200).

4. The gear selection and shifting actuator according to claim 3, wherein: The shift finger (304) has at least one shift finger shift position in the axial direction. When the shift finger (304) cooperates with the selected shift fork (200), the shift finger (304) can be driven by the shift shaft (100) to move from a shift finger neutral position to a shift finger shift position in the axial direction, and the selected shift fork (200) can be moved in the axial direction to a corresponding shift fork shift position.

5. The gear selection and shifting actuator according to claim 1, wherein: The shift finger (304) has a first surrounding portion (3042) at least partially surrounding the shift shaft (100) and a first radially extending portion (3044) extending in a radial direction of the shift shaft (100).

6. The gear selection and shifting actuator according to claim 3 or 4, wherein: The shift fork (200) comprises: Fork body (202); a shift fork ring (204) formed at one end of the shift fork body (202) and at least partially surrounding the shift shaft (100); and A shift fork pull plate (206), wherein the shift fork ring (204) extends from the shift fork body (202) in the axial direction, and the shift fork pull plate (206) has a shift finger matching structure matching with a shift finger (304) at a side facing the shift shaft (100).

7. The gear selection and shifting actuator according to claim 6, wherein: The shift finger matching structure of the shift fork pull plate (206) comprises a pull plate groove (2062), wherein the pull plate groove (2062) penetrates the shift fork pull plate (206) along the circumferential direction of the shift shaft (100), and the shift fork pull plate (206) is arranged so that when the sliding sleeve (302) rotates to one of the at least two gear selection angle positions, the shift finger (304) can extend into the pull plate groove (2062) of the selected shift fork (200).

8. The gear selection and shifting actuator according to claim 6, wherein: The fork pull plates (206) of the at least two shift forks (200) are arranged at different circumferential positions relative to the shift shaft (100).

9. The gear selection and shifting actuator according to any one of claims 1-5, 7-8, wherein: The sliding sleeve (302) has a sliding sleeve boss (3024) protruding outward in the radial direction on an axial section formed with the movement groove (3022), wherein the sliding sleeve boss (3024) partially surrounds the shift shaft (100) in the circumferential direction.

10. The gear selection and shifting actuator according to claim 9, wherein: The sliding sleeve boss (3024) is configured to be able to extend into the pull plate groove (2062) of the unselected shift fork (200).

11. The gear selection and shifting actuator according to claim 10, wherein: The thickness of the sliding sleeve boss (3024) and the finger (304) along the axial direction is respectively less than or equal to the width of the pull plate groove (2062) along the axial direction.

12. The gear selection and shifting actuator according to any one of claims 1-5, 7-8, 10-11, wherein: The sliding sleeve (302) has an axial locking structure, and the axial locking structure cooperates with the transmission housing so that the sliding sleeve (302) is fixed in the axial direction but can rotate around the shift shaft (100).

13. The gear selection and shifting actuator according to claim 12, wherein: The axial locking structure comprises a locking groove (3026) located at the outer circumferential surface of the sliding sleeve (302), wherein the locking groove (3026) is configured to be able to cooperate with a locking pin (308) fixed to the transmission housing.

14. The gear selection and shifting actuator according to claim 13, wherein: The locking groove (3026) at least partially extends in the circumferential direction, so that the locking groove (3026) cooperates with at least two locking pins (308) located on both sides of the shift shaft (100).

15. The gear selection and shifting actuator according to claim 13, wherein: A locking groove (3026) is formed on the outer circumferential surface of the sliding sleeve boss (3024).

16. The gear selection and shifting actuator according to claim 1, wherein: The sensor bracket (310) has a second surrounding portion (3102) at least partially surrounding the shift shaft (100) and a second radially extending portion (3104) extending in a radial direction of the shift shaft (100).

17. The gear selection and shifting actuator according to claim 16, wherein: The first surrounding portion (3042) has a first matching structure (3046), and the second surrounding portion (3102) has a second matching structure (3106). The first matching structure (3046) matches with the second matching structure (3106), so that the finger (304) and the sensor bracket (310) are fixed to each other in the axial direction.

18. The gear selection and shifting actuator according to any one of claims 1-5, 7-8, 10-11, 13-17, wherein: The shifting assembly (300) further includes a fixing device (312) fixed to the transmission housing, the sleeve (302) cooperates with the fixing device (312) so that the sleeve (302) can rotate relative to the fixing device (312), wherein the shifting assembly (300) further includes a shifting self-locking device (314) installed on the fixing device (312), the sleeve (302) has a shifting self-locking surface (3028) on the side facing the shifting self-locking device (314), and the shifting self-locking structure is formed on the shifting self-locking surface (3028), so that when the sleeve (302) rotates to one of the at least two shifting angle positions, the shifting self-locking structure and the shifting self-locking device (314) are locked with each other and provide a force to prevent the sleeve (302) from rotating.

19. The gear selection and shifting actuator according to claim 18, wherein: The gear selection self-locking device (314) comprises a first elastic member and a first self-locking block pressed by the first elastic member in the direction of the gear selection self-locking surface (3028), wherein the first self-locking block has a convex curved surface facing the gear selection self-locking surface (3028).

20. The gear selection and shifting actuator according to claim 19, wherein: The gear selection self-locking structure includes at least two self-locking recesses, and the self-locking recesses can at least partially accommodate the first self-locking block.

21. The gear selection and shifting actuator according to claim 20, wherein: The number of the self-locking recesses is consistent with the number of the shift forks (200); and / or The at least two self-locking recesses are at equal distances from the shift shaft (100).

22. The gear selection and shifting actuator according to any one of claims 1-5, 7-8, 10-11, 13-17, 19-21, wherein: The gear selection and shifting assembly (300) further comprises a gear selection shift shaft fixed to the sliding sleeve (302), wherein the gear selection shift shaft is configured to be driven to allow the sliding sleeve (302) to rotate around the gear shifting shaft (100).

23. The gear selection and shifting actuator according to claim 22, wherein: The shift selector shaft extends along the axial direction of the shift shaft (100).

24. The gear selection and shifting actuator according to any one of claims 1-5, 7-8, 10-11, 13-17, 19-21, and 23, wherein: The shifting actuator comprises a shift fork self-locking device (400), the shift fork (200) comprises a shift fork self-locking structure (208), and the shift fork self-locking device (400) and the shift fork self-locking structure (208) are configured such that when the shift fork (200) is located at at least two shift fork self-locking positions in the axial direction, the shift fork self-locking device (400) and the shift fork self-locking structure (208) are locked with each other and provide a force that prevents the shift fork (200) from moving in the axial direction.

25. The gear selection and shifting actuator according to claim 24, wherein: The at least two shift fork self-locking positions include: a shift fork standby position, when the shift fork (200) is in the shift fork standby position, the shift fork (200) can be selected by the shift selection assembly (300); and at least one shift fork shift position, when the shift fork (200) is selected and moves along the axial position to the shift fork shift position, shifting is achieved.

26. The gear selection and shifting actuator according to claim 24, wherein: The shift fork self-locking device (400) comprises a second elastic member (402) and a second self-locking block (404) pressed by the second elastic member (402) in the direction of the shift fork self-locking structure (208), wherein the second self-locking block (404) has a convex curved surface facing the shift fork self-locking structure (208); and / or The shift fork self-locking device (400) is directly or indirectly fixed to the transmission housing.

27. The gear selection and shifting actuator according to claim 24, wherein: The shift fork self-locking structure (208) is formed on the shift fork ring (204).

28. The gear selection and shifting actuator according to any one of claims 1-5, 7-8, 10-11, 13-17, 19-21, 23, 25-27, wherein: The rotation of the sliding sleeve (302) and / or the movement of the shift shaft (100) are driven by a pneumatic drive device.

29. A transmission, wherein: The transmission comprises a gear selection and shift actuator according to any one of claims 1-28.

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