Gear shifting mechanism, transmission, electric assembly and vehicle

Abstract

The invention discloses a gear shifting mechanism, a transmission, an electric assembly and a vehicle. The gear shifting mechanism comprises a first-gear gear, a second-gear gear and a shifting fork. The first-gear gear and the second-gear gear are arranged in a spaced mode in the first direction. The shifting fork can move in the first direction and is used for being matched with a first-gear gear or a second-gear gear, a first oil channel and a second oil channel are formed in the shifting fork, a first oil outlet of the first oil channel is used for supplying oil to the side, facing the second-gear gear, of the first-gear gear, and a second oil outlet of the second oil channel is used for supplying oil to the side, facing the first-gear gear, of the second-gear gear. A first oil inlet of the first oil duct is automatically opened when shifting to the first-gear gear, and is automatically closed before shifting to the first-gear gear and after shifting; and a second oil inlet of the second oil duct is automatically opened when shifting the gear to the second-gear gear, and is automatically closed before shifting the gear to the second-gear gear and after shifting the gear. According to the gear shifting mechanism, the lubricating and cooling effects can be guaranteed through the gear shifting mechanism, circulation and disconnection of lubricating oil can be achieved without participation of a control mechanism, and therefore the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a shift mechanism, a transmission, an electric assembly and a vehicle. Background Art

[0002] In the related art, the shift mechanism of the vehicle will generate a lot of heat due to friction during the shifting process. If it is not lubricated by lubricating oil, the shift mechanism will easily fail due to thermal decay. However, before and after the shifting, the shift mechanism does not need lubricating oil. The existing shift mechanism cannot realize the automatic circulation and disconnection of lubricating oil, and controlling the circulation and disconnection of lubricating oil through control mechanisms such as solenoid valves will increase costs. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a shift mechanism, which can ensure lubrication and cooling effects, and can realize the circulation and disconnection of lubricating oil without the participation of a control mechanism, thereby reducing costs.

[0004] The present invention also provides a transmission, which includes the above-mentioned shifting mechanism.

[0005] The present invention also provides an electric assembly, which includes the above-mentioned transmission.

[0006] The present invention also provides a vehicle, comprising the electric assembly described above.

[0007] According to an embodiment of the present invention, the shift mechanism comprises: a first gear, a second gear and a shift fork. The first gear and the second gear are arranged at intervals along a first direction; the shift fork is movable along the first direction and is used to cooperate with the first gear or the second gear; the shift fork has a first oil passage and a second oil passage inside; the first oil outlet of the first oil passage is used to supply oil to the side of the first gear facing the second gear, the second oil outlet of the second oil passage is used to supply oil to the side of the second gear facing the first gear, the first oil inlet of the first oil passage is automatically opened during the shifting process to the first gear, and is automatically closed before the shifting to the first gear and when the shifting is completed; the second oil inlet of the second oil passage is automatically opened during the shifting process to the second gear, and is automatically closed before the shifting to the second gear and when the shifting is completed.

[0008] According to the shift mechanism of the embodiment of the present invention, by setting the first oil channel and the second oil channel in the shift fork movable along the first direction, the first oil outlet of the first oil channel is used to supply oil to the side of the first gear gear facing the second gear gear, and the second oil outlet of the second oil channel is used to supply oil to the side of the second gear gear facing the first gear gear. At the same time, the first oil inlet of the first oil channel and the second oil inlet of the second oil channel can be automatically opened during the shift process, and automatically closed before and at the end of the shift, so that the lubricating oil can take away the heat generated by the friction between the first gear gear, the second gear gear and the shift fork, ensuring the lubrication and cooling effect, avoiding the failure of the shift mechanism due to thermal decay, and reducing the wear between the components, thereby extending the service life of the shift mechanism. Moreover, the circulation and disconnection of the lubricating oil can be realized without the participation of any control mechanism such as a solenoid valve, etc., which can greatly save the cost of the shift mechanism while ensuring the lubrication effect.

[0009] According to some embodiments of the present invention, the two ends of the shift fork along the first direction are respectively a first end and a second end, and the shift mechanism further includes: a lubricating oil pipeline, a first box body and a second box body, the lubricating oil pipeline is used to be connected to a lubricating oil supply system; a first lubricating oil inlet connected to the lubricating oil pipeline is provided on an inner wall of the first box body, the first end of the shift fork extends into the first box body and is movable along the first direction, the first oil inlet is located in the first box body and faces the first lubricating oil inlet; the second box body is spaced apart from the first box body along the first direction, the second lubricating oil inlet connected to the lubricating oil pipeline is provided on the inner wall of the second box body, The second end of the fork extends into the second housing and is movable along the first direction, and the second oil inlet is located in the second housing and faces the second lubricating oil inlet; along the first direction, when the shift fork is not shifting toward the first gear and the second gear, the first oil inlet and the second oil inlet are located between the first lubricating oil inlet and the second lubricating oil inlet, and after the shift fork and the first gear are shifted, the first oil inlet is located on the side of the first lubricating oil inlet away from the second lubricating oil inlet, and after the shift fork and the second gear are shifted, the second oil inlet is located on the side of the second lubricating oil inlet away from the first lubricating oil inlet.

[0010] In some embodiments of the present invention, the shape of the first oil inlet is the same as the shape of the first lubricating oil inlet, and the cross-sectional area of ​​the first oil inlet is larger than the cross-sectional area of ​​the first lubricating oil inlet; and / or, the shape of the second oil inlet is the same as the shape of the second lubricating oil inlet, and the cross-sectional area of ​​the second oil inlet is larger than the cross-sectional area of ​​the second lubricating oil inlet.

[0011] In some embodiments of the present invention, a first driving oil chamber is formed between the first housing and a side of the first end facing away from the second end, and a second driving oil chamber is formed between the second housing and a side of the second end facing away from the first end, and the first driving oil chamber and the second driving oil chamber are suitable for being connected to a driving oil supply system.

[0012] In some embodiments of the present invention, the shift mechanism further includes: a first self-locking structure and a second self-locking structure, the first self-locking structure being disposed at the first end and being suitable for cooperating with the first housing, and being used for positioning the shift fork after the shift fork completes shifting to the first gear; the second self-locking structure being disposed at the second end and being suitable for cooperating with the second housing, and being used for positioning the shift fork after the shift fork completes shifting to the second gear.

[0013] In some embodiments of the present invention, a first driving oil port connected to the driving oil supply system is provided on the first housing, the first driving oil port is located on the side of the first lubricating oil inlet away from the second housing, a first mounting groove is provided at the first end, a first connecting hole connected to the first driving oil chamber is provided on the side wall of the first mounting groove, the first self-locking structure is provided in the first mounting groove, and after the shifting of the shift fork and the first gear is completed, the notch of the first mounting groove is opposite to the first driving oil port, and the first self-locking structure is suitable for extending into the first driving oil port.

[0014] In some embodiments of the present invention, the first self-locking structure includes: a first self-locking pin and a first elastic member, wherein the first self-locking pin is movable along the depth direction of the first mounting groove; the first elastic member is arranged in the first mounting groove and is located between the first self-locking pin and the bottom wall of the first mounting groove, and is used to drive the first self-locking pin to move toward the first driving oil port.

[0015] In some embodiments of the present invention, a second driving oil port connected to the driving oil supply system is provided on the second housing, the second driving oil port is located on the side of the second lubricating oil inlet away from the first housing, a second mounting groove is provided at the second end, a second connecting hole connected to the second driving oil chamber is provided on the side wall of the second mounting groove, the second self-locking structure is provided in the second mounting groove, after the shifting of the shift fork and the second gear is completed, the notch of the second mounting groove is opposite to the second driving oil port, and the second self-locking structure is suitable for extending into the second driving oil port.

[0016] In some embodiments of the present invention, the second self-locking structure includes a second self-locking pin and a second elastic member, and the second self-locking pin is movable along the depth direction of the second mounting groove; the second elastic member is arranged in the second mounting groove and is located between the second self-locking pin and the bottom wall of the second mounting groove, and is used to drive the second self-locking pin to move toward the second driving oil port.

[0017] In some embodiments of the present invention, a first sealing ring is provided between the inner circumferential wall of the first housing and the outer circumferential wall of the first end, and the first sealing ring is located on the side of the first lubricating oil inlet facing the second housing; and / or, a second sealing ring is provided between the inner circumferential wall of the second housing and the outer circumferential wall of the second end, and the second sealing ring is located on the side of the second lubricating oil inlet facing the first housing.

[0018] According to some embodiments of the present invention, the shift fork includes a fork body and a fork angle, the fork body extends along the first direction, one end of the fork angle is connected to the fork body and is located between the first gear gear and the second gear gear, the shift mechanism also includes a synchronizer, the synchronizer includes a synchronization sleeve, the synchronization sleeve is connected to the other end of the fork angle and is suitable for cooperating with the first gear gear or the second gear gear, the first oil channel and the second oil channel are both provided on the fork body, the first oil outlet is arranged adjacent to the fork angle and is located on the side of the fork angle facing the first gear gear, and the second oil outlet is arranged adjacent to the fork angle and is located on the side of the fork angle facing the second gear gear.

[0019] In some embodiments of the present invention, the first oil channel is located on the side of the fork angle facing the first gear and extends along the length direction of the fork body; and / or, the second oil channel is located on the side of the fork angle facing the second gear and extends along the length direction of the fork body; and / or, the first oil outlet is one or more; and / or, the second oil outlet is one or more.

[0020] A transmission according to an embodiment of the present invention includes: the above-mentioned shifting mechanism.

[0021] According to the transmission of the embodiment of the present invention, by setting the first oil channel and the second oil channel in the shift fork movable along the first direction, the first oil outlet of the first oil channel is used to supply oil to the side of the first gear gear facing the second gear gear, and the second oil outlet of the second oil channel is used to supply oil to the side of the second gear gear facing the first gear gear, and the first oil inlet of the first oil channel and the second oil inlet of the second oil channel can be automatically opened during the shifting process, and automatically closed before the shifting and at the end of the shifting, so that the lubricating oil can take away the heat generated by the friction between the first gear gear, the second gear gear and the shift fork, ensure the lubrication and cooling effect, avoid the failure of the shift mechanism due to thermal decay, and reduce the wear between the components, thereby extending the service life of the shift mechanism and the transmission. Moreover, the circulation and disconnection of the lubricating oil can be realized without the participation of any control mechanism such as a solenoid valve, etc., while ensuring the lubrication effect, the cost of the shift mechanism can be greatly saved, thereby reducing the cost of the transmission.

[0022] An electric assembly according to an embodiment of the present invention includes: the above-mentioned transmission.

[0023] According to the electric assembly of the embodiment of the present invention, a first oil channel and a second oil channel are arranged in a shift fork movable in a first direction, the first oil outlet of the first oil channel is used to supply oil to the side of the first gear gear facing the second gear gear, and the second oil outlet of the second oil channel is used to supply oil to the side of the second gear gear facing the first gear gear, and the first oil inlet of the first oil channel and the second oil inlet of the second oil channel can be automatically opened during the shifting process, and automatically closed before and at the end of the shifting, so that the lubricating oil can take away the heat generated by the friction between the first gear gear, the second gear gear and the shift fork, ensure the lubrication and cooling effect, avoid the failure of the shift mechanism due to thermal decay, and reduce the wear between the components, thereby extending the service life of the shift mechanism and the transmission, and further extending the service life of the electric assembly. Moreover, the circulation and disconnection of the lubricating oil can be realized without the participation of any control mechanism such as a solenoid valve, etc., while ensuring the lubrication effect, the cost of the shift mechanism and the transmission can be greatly saved, thereby reducing the cost of the electric assembly.

[0024] A vehicle according to an embodiment of the present invention includes: the above-mentioned electric assembly.

[0025] According to the vehicle of the embodiment of the present invention, by setting the first oil channel and the second oil channel in the shift fork movable along the first direction, the first oil outlet of the first oil channel is used to supply oil to the side of the first gear gear facing the second gear gear, and the second oil outlet of the second oil channel is used to supply oil to the side of the second gear gear facing the first gear gear, and the first oil inlet of the first oil channel and the second oil inlet of the second oil channel can be automatically opened during the shifting process, and automatically closed before the shifting and at the end of the shifting, so that the lubricating oil can take away the heat generated by the friction between the first gear gear, the second gear gear and the shift fork, ensure the lubrication and cooling effect, avoid the failure of the shift mechanism due to thermal decay, and reduce the wear between the components, thereby extending the service life of the shift mechanism and the electric assembly. Moreover, the circulation and disconnection of the lubricating oil can be realized without the participation of any control mechanism such as a solenoid valve, etc., while ensuring the lubrication effect, the cost of the shift mechanism and the electric assembly can be greatly saved, thereby reducing the cost of the vehicle.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a perspective view of a shift mechanism according to an embodiment of the present invention;

[0029] Figure 2 is a cross-sectional view of a shift mechanism according to an embodiment of the present invention, wherein the shift fork is not shifted toward the first gear and the second gear;

[0030] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0031] Figure 4 is a cross-sectional view of a shift mechanism according to an embodiment of the present invention, wherein the shift fork is in the process of shifting toward a first gear and the first oil inlet is directly opposite to the first lubricating oil inlet;

[0032] Figure 5 yes Figure 4 The enlarged view of point B in the middle;

[0033] Figure 6 is a cross-sectional view of a shift mechanism according to an embodiment of the present invention, wherein the shift fork ends shifting toward the first gear and a portion of the first self-locking pin moves into the first drive oil port;

[0034] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0035] Figure 8 is a cross-sectional view of a shift mechanism according to an embodiment of the present invention, wherein the shift fork cooperates with the first gear and the first self-locking pin is completely located in the first mounting groove;

[0036] Fig. 9 yes Figure 8 The enlarged view of point D in the middle;

[0037] Fig.10 yes Figure 2 Enlarged view of point E in the middle.

[0038] Reference numerals:

[0039] 100. Gear shifting mechanism;

[0040] 1. First gear; 11. First engaging tooth;

[0041] 2. Second gear; 21. Second engaging tooth;

[0042] 3. Fork; 31. First oil passage; 311. First oil outlet; 312. First oil inlet; 32. Second oil passage; 321. Second oil outlet; 322. Second oil inlet; 33. First end; 34. Second end; 35. First mounting groove; 351. First connecting hole; 36. Second mounting groove; 361. Second connecting hole; 37. Fork body; 38. Fork angle;

[0043] 4. Lubricating oil pipeline;

[0044] 5. First housing; 51. First lubricating oil inlet; 52. First driving oil chamber; 53. First driving oil port; 54. First sealing ring;

[0045] 6. Second housing; 61. Second lubricating oil inlet; 62. Second driving oil chamber; 63. Second driving oil port; 64. Second sealing ring;

[0046] 7. First self-locking structure; 71. First self-locking pin; 72. First elastic member;

[0047] 8. Second self-locking structure; 81. Second self-locking pin; 82. Second elastic member;

[0048] 9. Synchronizer; 91. Synchronous gear sleeve; 92. First synchronizer ring; 93. Second synchronizer ring. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Reference below Figure 1-Figure 10 A shift mechanism 100 according to an embodiment of the present invention will be described.

[0053] like Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, the shift mechanism 100 according to the embodiment of the present invention includes a first gear 1 , a second gear 2 and a shift fork 3 .

[0054] Specifically, Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 8As shown, the shift mechanism 100 is suitable for use in a vehicle, the first gear 1 and the second gear 2 are arranged at intervals along a first direction, and the shift fork 3 is movable along the first direction to cooperate with the first gear 1 or the second gear 2. The shift fork 3 is suitable for being connected to the shift lever of the vehicle, and when the driver of the vehicle operates the shift lever, the shift lever drives the shift fork 3 to move in the first direction, driving the shift fork 3 to move toward the direction close to the first gear 1 or the second gear 2, so that the shift fork 3 cooperates with the first gear 1 or the second gear 2, achieving the purpose of gear switching, and finally realizing the function of shifting.

[0055] The shift fork 3 has a first oil passage 31 and a second oil passage 32. The first oil outlet 311 of the first oil passage 31 is used to supply oil to the side of the first gear 1 facing the second gear 2, and the second oil outlet 321 of the second oil passage 32 is used to supply oil to the side of the second gear 2 facing the first gear 1. The first oil inlet 312 of the first oil passage 31 is automatically opened during the shifting process to the first gear 1, and is automatically closed before the shifting to the first gear 1 and after the shifting is completed; the second oil inlet 322 of the second oil passage 32 is automatically opened during the shifting process to the second gear 2, and is automatically closed before the shifting to the second gear 2 and after the shifting is completed.

[0056] It can be understood that the first oil channel 31 and the second oil channel 32 are used for the circulation of lubricating oil. In the first direction, the first oil inlet 312 and the first oil outlet 311 can be located at the two ends of the first oil channel 31 respectively, and the second oil inlet 322 and the second oil outlet 321 can be located at the two ends of the second oil channel 32 respectively.

[0057] When the shift fork 3 moves toward the first gear 1 and cooperates with the first gear 1 to achieve gear shifting, the side of the first gear 1 facing the second gear 2 will generate severe friction and a large amount of heat. At this time, the first oil inlet 312 is automatically opened, and the first oil channel 31 is connected to the lubricating oil supply system. The lubricating oil can enter the first oil channel 31 from the first oil inlet 312, and flow out from the first oil outlet 311 after flowing through the first oil channel 31, and flow to the side of the first gear 1 facing the second gear 2. Therefore, the heat generated during the friction between the first gear 1 and the shift fork 3 can be taken away by the flowing lubricating oil, thereby reducing the temperature of the side of the first gear 1 facing the second gear 2, and avoiding the failure of the first gear 1 and the shift fork 3 due to thermal decay. It can also reduce the wear of the first gear 1 and other components, thereby extending the service life of the shift mechanism 100. When the shift process of the shift fork 3 and the first gear 1 is completed, the first oil inlet 312 is automatically closed to reduce the oil supply pressure and avoid resource waste.

[0058] Similarly, when the shift fork 3 moves toward the second gear 2 and cooperates with the second gear 2 to achieve the shift, the side of the second gear 2 facing the first gear 1 will generate severe friction and a large amount of heat. At this time, the second oil inlet 322 is automatically opened, and the second oil channel 32 is connected to the lubricating oil supply system. The lubricating oil can enter the second oil channel 32 from the second oil inlet 322, and flow out from the second oil outlet 321 after flowing through the second oil channel 32, and flow to the side of the second gear 2 facing the second gear 2. Therefore, the heat generated between the second gear 2 and the shift fork 3 during the friction process can be taken away by the flowing lubricating oil, thereby reducing the temperature of the side of the second gear 2 facing the second gear 2, and avoiding the failure of the second gear 2 and the shift fork 3 due to thermal decay. It can also reduce the wear of the second gear 2 and other components, thereby extending the service life of the shift mechanism 100. When the shift process of the shift fork 3 and the second gear 2 is completed, the second oil inlet 322 is automatically closed, which can reduce the oil supply pressure and avoid resource waste.

[0059] Among them, when the fork 3 moves along the first direction, the first oil inlet 312 and the second oil inlet 322 can be automatically opened during the gear shifting process, and automatically closed before and at the end of the gear shifting. The circulation and disconnection of the lubricating oil can be achieved without the participation of any control mechanism such as a solenoid valve. While ensuring the lubrication effect, the cost of the gear shifting mechanism 100 can be greatly saved.

[0060] According to the shift mechanism 100 of the embodiment of the present invention, by setting the first oil passage 31 and the second oil passage 32 in the shift fork 3 movable in the first direction, the first oil outlet 311 of the first oil passage 31 is used to supply oil to the side of the first gear 1 facing the second gear 2, and the second oil outlet 321 of the second oil passage 32 is used to supply oil to the side of the second gear 2 facing the first gear 1, and the first oil inlet 312 of the first oil passage 31 and the second oil inlet 322 of the second oil passage 32 can be automatically opened during the shift process, and automatically closed before and at the end of the shift, so that the lubricating oil can take away the heat generated during the friction between the first gear 1, the second gear 2 and the shift fork 3, ensuring the lubrication and cooling effect, avoiding the failure of the shift mechanism 100 due to thermal decay, and reducing the wear between the components, thereby extending the service life of the shift mechanism 100. Moreover, the circulation and disconnection of the lubricating oil can be realized without the participation of any control mechanism such as a solenoid valve, etc., which can greatly save the cost of the shift mechanism 100 while ensuring the lubrication effect.

[0061] In some embodiments of the present invention, Figure 2-Figure 10As shown, the two ends of the shift fork 3 along the first direction are respectively a first end 33 and a second end 34, and the shift mechanism 100 also includes a lubricating oil pipeline 4, a first box body 5 and a second box body 6. The lubricating oil pipeline 4 is used to be connected to a lubricating oil supply system, and the lubricating oil supply system can provide lubricating oil. The first oil channel 31 and the second oil channel 32 are connected to the lubricating oil supply system through the lubricating oil pipeline 4.

[0062] The first housing 5 has a first lubricating oil inlet 51 connected to the lubricating oil pipeline 4 on its inner wall, the first end 33 of the shift fork 3 extends into the first housing 5 and is movable along the first direction, and the first oil inlet 312 is located in the first housing 5 and faces the first lubricating oil inlet 51. The second housing 6 is spaced apart from the first housing 5 along the first direction, the second housing 6 has a second lubricating oil inlet 61 connected to the lubricating oil pipeline 4 on its inner wall, the second end 34 of the shift fork 3 extends into the second housing 6 and is movable along the first direction, and the second oil inlet 322 is located in the second housing 6 and faces the second lubricating oil inlet 61.

[0063] Further, along the first direction, when the shift fork 3 is not shifting toward the first gear 1 and the second gear 2, the first oil inlet 312 and the second oil inlet 322 are located between the first lubricating oil inlet 51 and the second lubricating oil inlet 61; after the shift fork 3 and the first gear 1 are shifted, the first oil inlet 312 is located on the side of the first lubricating oil inlet 51 away from the second lubricating oil inlet 61; after the shift fork 3 and the second gear 2 are shifted, the second oil inlet 322 is located on the side of the second lubricating oil inlet 61 away from the first lubricating oil inlet 51.

[0064] It is understandable that if Figure 2 and Figure 3 As shown, the shift mechanism 100 has a neutral state, and the first oil inlet 312 and the second oil inlet 322 are located between the first lubricating oil inlet 51 and the second lubricating oil inlet 61 in the first direction. When the shift fork 3 shifts toward the first gear 1, the shift fork 3 moves along the direction from the second end 34 to the first end 33, and the first oil inlet 312 approaches the first lubricating oil inlet 51. In the process of the shift fork 3 shifting toward the first gear 1, the first oil inlet 312 gradually overlaps with the first lubricating oil inlet 51, and part of the first oil inlet 312 is connected with part of the first lubricating oil inlet 51, so that the first oil inlet 312 is automatically opened gradually, thereby, the lubricating oil provided to the lubricating oil pipeline by the lubricating oil supply system can enter the first oil channel 31 via the connected first lubricating oil inlet 51 and the first oil inlet 312 in sequence. As the shift fork 3 moves, the overlapping area between the first oil inlet 312 and the first lubricating oil inlet 51 gradually increases, and the flow rate of lubricating oil entering the first oil passage 31 from the lubricating oil pipeline also gradually increases.

[0065] like Figure 4 and Figure 5 As shown, during the process of the shift fork 3 shifting toward the first gear 1, when the first oil inlet 312 is opposite to the first lubricating oil inlet 51, the lubricating oil flow rate entering the first oil channel 31 from the lubricating oil pipeline reaches a maximum. At this time, a large amount of heat is generated on the side of the first gear 1 facing the second gear 2 due to intense friction, and its lubricating oil demand reaches a maximum. A large amount of lubricating oil flowing out from the first oil outlet 311 can take away a large amount of heat generated between the first gear 1 and the shift fork 3 during the friction process, thereby reducing the temperature and avoiding failure of the first gear 1 and the shift fork 3 due to thermal decay.

[0066] Then, the shift fork 3 continues to move in the direction from the second end 34 to the first end 33. At this time, the overlapping area of ​​the first oil inlet 312 and the first lubricating oil inlet 51 gradually decreases, and the lubricating oil flow rate entering the first oil channel 31 from the lubricating oil pipeline also gradually decreases. At this time, the shift fork 3 gradually cooperates with the first gear 1, and its lubricating oil demand also gradually decreases.

[0067] When the shift fork 3 ends the shift toward the first gear 1, the first gear 1 facing the second gear 2 no longer needs lubricating oil. Figure 6 and Figure 7 In the example shown, the first oil inlet 312 moves to the side of the first lubricating oil inlet 51 away from the second lubricating oil inlet 61, so that the first oil inlet 312 is automatically closed, and the first lubricating oil inlet 51 and the first oil inlet 312 are not connected. Therefore, the lubricating oil provided to the lubricating oil pipeline by the lubricating oil supply system cannot enter the first oil channel 31 via the first lubricating oil inlet 51 and the first oil inlet 312, which can reduce the oil supply pressure and avoid waste of resources.

[0068] Similarly, when the shift fork 3 shifts toward the first gear 1, the shift fork 3 moves in the direction from the first end 33 to the second end 34, and the second oil inlet 322 approaches the second lubricating oil inlet 61. In the process of the shift fork 3 shifting toward the second gear 2, the second oil inlet 322 gradually overlaps with the second lubricating oil inlet 61, and part of the second oil inlet 322 is connected with part of the second lubricating oil inlet 61, so that the second oil inlet 322 is automatically opened gradually, thereby, the lubricating oil provided to the lubricating oil pipeline by the lubricating oil supply system can enter the second oil passage 32 through the connected second lubricating oil inlet 61 and the second oil inlet 322 in sequence. And along with the movement of the shift fork 3, the overlapping area of ​​the second oil inlet 322 and the second lubricating oil inlet 61 gradually increases, and the flow rate of lubricating oil entering the second oil passage 32 from the lubricating oil pipeline also gradually increases.

[0069] During the process of shifting the shift fork 3 toward the second gear 2, when the second oil inlet 322 is opposite to the second lubricating oil inlet 61, the lubricating oil flow rate entering the second oil channel 32 from the lubricating oil pipeline reaches a maximum. At this time, a large amount of heat is generated on the side of the second gear 2 facing the first gear 1 due to intense friction, and its lubricating oil demand reaches a maximum. The large amount of lubricating oil flowing out from the second oil outlet 321 can take away a large amount of heat generated between the second gear 2 and the shift fork 3 during the friction process, thereby reducing the temperature and avoiding failure of the second gear 2 and the shift fork 3 due to thermal decay.

[0070] Then, the shift fork 3 continues to move in the direction from the first end 33 to the second end 34. At this time, the overlapping area of ​​the second oil inlet 322 and the second lubricating oil inlet 61 gradually decreases, and the lubricating oil flow rate entering the second oil channel 32 from the lubricating oil pipeline also gradually decreases. At this time, the shift fork 3 gradually cooperates with the second gear 2, and its lubricating oil demand also gradually decreases.

[0071] When the shift fork 3 finishes shifting toward the second gear 2, the side of the second gear 2 facing the second gear 2 no longer needs lubricating oil, and at this time the second oil inlet 322 moves to the side of the second lubricating oil inlet 61 away from the first lubricating oil inlet 51, so that the second oil inlet 322 is automatically closed, and the second lubricating oil inlet 61 and the second oil inlet 322 are not connected. Therefore, the lubricating oil provided to the lubricating oil pipeline by the lubricating oil supply system cannot enter the second oil channel 32 via the second lubricating oil inlet 61 and the second oil inlet 322, which can reduce the oil supply pressure and avoid waste of resources.

[0072] In the present application, the shift mechanism 100 can automatically realize the circulation and disconnection of lubricating oil according to the displacement of the shift fork 3 during the shifting process or the shifting stage, and automatically adjust the supply of lubricating oil according to the different lubricating oil requirements of the first gear 1 or the second gear 2 at different stages during the shifting process, thereby realizing the precise control of the lubricating oil amount of the shift mechanism 100 at each stage of the shifting process, thereby improving the lubrication effect, thereby ensuring the shifting stability of the shift mechanism 100 and improving the service life of the shift mechanism 100. At the same time, the lubricating oil flow can be adjusted without the participation of any control mechanism such as a solenoid valve, which can greatly save the cost of the shift mechanism 100 while ensuring the lubrication effect.

[0073] In the present application, in the entire stroke from when the shift fork 3 does not shift toward the first gear 1 and the second gear 2 to when the shift fork 3 finishes shifting, when the flow rate of the lubricating oil reaches the maximum, the stroke moved by the shift fork 3 accounts for 25%-70% of the above-mentioned entire shifting stroke. In the entire shifting stroke, the flow rate of the lubricating oil flowing from the shift fork 3 to the first gear 1 or the second gear 2 gradually increases from zero, reaches the maximum, and then gradually decreases to zero. In the entire shifting stroke, the demand for lubricating oil by the first gear 1 and the second gear 2 also gradually increases from zero, reaches the maximum, and then gradually decreases to zero.

[0074] When the shift fork 3 moves to a range of 25%-70% of the entire shift stroke, the heat generated by the friction between the first gear 1 and the second gear 2 or between the second gear 2 and the first gear 1 reaches a maximum, and the flow rate of the lubricating oil also reaches a maximum at this time. Therefore, the shift mechanism 100 can actively provide a lubricating oil flow rate that matches the demand for the amount of lubricating oil during the shifting process, thereby ensuring the cooling effect of the lubricating oil on the first gear 1 and the second gear 2, and there is no need to set components such as solenoid valves, thereby reducing costs.

[0075] In some embodiments of the present invention, Figure 2-Figure 10 As shown, the shape of the first oil inlet 312 is the same as that of the first lubricating oil inlet 51, and the cross-sectional area of ​​the first oil inlet 312 is larger than the cross-sectional area of ​​the first lubricating oil inlet 51. The first oil inlet 312 and the first lubricating oil inlet 51 of the same shape can be matched and ensure the connection between the lubricating oil pipeline 4 and the first oil channel 31. When the first oil inlet 312 and the first lubricating oil inlet 51 are opposite to each other, the first oil inlet 312 with a larger cross-sectional area can ensure that the lubricating oil flowing out of the first lubricating oil inlet 51 basically flows into the first oil channel 31, and avoids part of the lubricating oil flowing out of the first lubricating oil inlet 51 from flowing into between the first housing 5 and the shift fork 3, thereby causing lubricating oil leakage.

[0076] In some embodiments of the present invention, Figure 2-Figure 10 As shown, the shape of the second oil inlet 322 is the same as that of the second lubricating oil inlet 61, and the cross-sectional area of ​​the second oil inlet 322 is larger than that of the second lubricating oil inlet 61. The second oil inlet 322 and the second lubricating oil inlet 61 of the same shape can be matched and ensure the connection between the lubricating oil pipeline 4 and the second oil channel 32. When the second oil inlet 322 and the second lubricating oil inlet 61 are opposite, the second oil inlet 322 with a larger cross-sectional area can ensure that the lubricating oil flowing out of the second lubricating oil inlet 61 basically flows into the second oil channel 32, and avoids part of the lubricating oil flowing out of the second lubricating oil inlet 61 from flowing into between the second box 6 and the fork 3, thereby causing lubricating oil leakage.

[0077] In some embodiments of the present invention, Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, a first driving oil chamber 52 is formed between the side of the first end 33 away from the second end 34 and the first housing 5, and a second driving oil chamber 62 is formed between the side of the second end 34 away from the first end 33 and the second housing 6. The first driving oil chamber 52 and the second driving oil chamber 62 are suitable for being connected to a driving oil supply system. The driving oil supply system can provide driving oil to the first driving oil chamber 52 and the second driving oil chamber 62, and can provide driving force for the movement of the shift fork 3 in the first direction, thereby providing power for the shift fork 3 to shift toward the first gear 1 or the second gear 2. In addition, the present application adopts a pure hydraulic method to provide power for shifting and to achieve lubrication and cooling. The driving oil supply system and the lubricating oil supply system can be shared, which is conducive to reducing the layout difficulty and cost.

[0078] Specifically, when the shift fork 3 shifts toward the first gear 1, the drive oil supply system supplies drive oil to the second drive oil chamber 62. As the amount of oil in the second drive oil chamber 62 gradually increases, the drive oil in the second drive oil chamber 62 generates pressure on the second end 34 of the shift fork 3, pushing the shift fork 3 to move in the direction from the second end 34 to the first end 33, thereby enabling the shift fork 3 to cooperate with the first gear 1. When the shift fork 3 shifts toward the second gear 2, the drive oil supply system supplies drive oil to the first drive oil chamber 52. As the amount of oil in the first drive oil chamber 52 gradually increases, the drive oil in the first drive oil chamber 52 generates pressure on the first end 33 of the shift fork 3, pushing the shift fork 3 to move in the direction from the first end 33 to the second end 34, thereby enabling the shift fork 3 to cooperate with the second gear 2.

[0079] In some embodiments of the present invention, Figure 2-Figure 10 As shown, the shift mechanism 100 further includes a first self-locking structure 7 and a second self-locking structure 8. The first self-locking structure 7 is provided at the first end 33 and is suitable for cooperating with the first housing 5, and is used to position the shift fork 3 after the shift fork 3 is shifted to the first gear 1. The second self-locking structure 8 is provided at the second end 34 and is suitable for cooperating with the second housing 6, and is used to position the shift fork 3 after the shift fork 3 is shifted to the second gear 2. When the shift fork 3 is shifted to the first gear 1, the first self-locking structure 7 can be fixed to the first housing 5, so that the shift fork 3 and the first housing 5 cannot move relative to each other in the first direction. When the shift fork 3 is shifted to the second gear 2, the second self-locking structure 8 can be fixed to the second housing 6, so that the shift fork 3 and the second housing 6 cannot move relative to each other in the first direction. The shift fork 3 can be prevented from moving in the first direction after the shift is completed, and the stability of the cooperation between the shift fork 3 and the first gear 1 or the second gear 2 can be ensured, so that the automatic shifting and automatic disengagement of the shift mechanism can be avoided, thereby enhancing the stability and reliability of the shift mechanism.

[0080] In some embodiments of the present invention, Figure 2-Figure 10 As shown, the first housing 5 is provided with a first driving oil port 53 connected with the driving oil supply system. The first driving oil port 53 is located on the side of the first lubricating oil inlet 51 away from the second housing 6. The driving oil provided by the driving oil supply system can enter the first driving oil chamber 52 through the first driving oil port 53. The first driving oil port 53 and the first driving oil chamber 52 are both located on the side of the first lubricating oil inlet 51 away from the second housing 6, thereby ensuring the driving effect of the driving oil in the first driving oil chamber 52 on the fork 3.

[0081] Furthermore, a first mounting groove 35 is provided at the first end 33, and a first connecting hole 351 connected to the first driving oil chamber 52 is provided on the side wall of the first mounting groove 35. The first self-locking structure 7 is provided in the first mounting groove 35. After the shifting of the shift fork 3 and the first gear 1 is completed, the notch of the first mounting groove 35 is opposite to the first driving oil port 53, and the first self-locking structure 7 is suitable for extending into the first driving oil port 53.

[0082] It is understandable that during the shifting process between the shift fork 3 and the first gear 1, the first self-locking structure 7 is located in the first installation groove 35, which can ensure the movement of the shift fork 3 in the first direction to achieve the shifting. After the shifting between the shift fork 3 and the first gear 1 is completed, the first self-locking structure 7 in the first installation groove 35 extends into the first drive oil port 53. At this time, the first drive oil port 53 can produce a positioning and limiting effect on the first self-locking structure 7, so that the shift fork 3 and the first housing 5 cannot produce relative movement in the first direction. The structure is simple and easy to implement, and can ensure the stability of the cooperation between the shift fork 3 and the first gear 1, thereby avoiding the phenomenon of automatic shifting and automatic disengagement of the shifting mechanism, and further enhancing the stability and reliability of the shifting mechanism.

[0083] In some embodiments of the present invention, Figure 2-Figure 10 As shown, the first self-locking structure 7 includes a first self-locking pin 71 and a first elastic member 72. The first self-locking pin 71 is movable along the depth direction of the first mounting groove 35. The first elastic member 72 is arranged in the first mounting groove 35 and is located between the first self-locking pin 71 and the bottom wall of the first mounting groove 35, and is used to drive the first self-locking pin 71 to move toward the first driving oil port 53.

[0084] It can be understood that, during the shifting process between the shift fork 3 and the first gear 1, the first self-locking pin 71 and the first elastic member 72 are located in the first mounting groove 35, the first elastic member 72 is in a compressed state, and the end of the first self-locking pin 71 that is away from the first elastic member 72 abuts against the inner wall of the first box body 5, which can ensure the movement of the shift fork 3 in the first direction to achieve shifting.

[0085] After the shift fork 3 and the first gear 1 are shifted, the notch of the first mounting groove 35 is directly opposite to the first driving oil port 53, the first elastic member 72 is extended, and the first elastic member 72 in the compressed state pushes the first self-locking pin 71 to move toward the first driving oil port 53, so that at least part of the first self-locking pin 71 extends into the first driving oil port 53. At this time, the first driving oil port 53 can produce a positioning and limiting effect on the first self-locking pin 71, so that the shift fork 3 and the first box body 5 cannot produce relative movement in the first direction. The structure is simple and easy to implement, and the automatic positioning and locking of the shift fork 3 can be achieved, and the stability of the matching between the shift fork 3 and the first gear 1 can be ensured, so as to avoid the phenomenon of automatic shifting and automatic disengagement of the shifting mechanism, thereby enhancing the stability and reliability of the shifting mechanism. And there is no need to introduce a control device for locking the shift fork 3, so that the number of parts is reduced, which is conducive to reducing the difficulty and cost of layout.

[0086] In the present application, when the shift fork 3 shifts from the first gear 1 to the neutral gear, the driving oil provided by the driving oil supply system can generate thrust on the first self-locking pin 71 at the first driving oil port 53, and the first self-locking pin 71 then generates pressure on the first elastic member 72, so that the first elastic member 72 is shortened and the first self-locking pin 71 moves toward the first elastic member 72. When the first self-locking pin 71 is completely moved into the first mounting groove 35 and continues to move toward the first elastic member 72, the first connecting hole 351 is connected with the first driving oil port 53. At this time, the driving oil can enter the first driving oil chamber 52 from the first connecting hole 351, thereby providing driving force for the movement of the shift fork 3 in the first direction, thereby providing power for the shift fork 3 to shift from the first gear 1 to the neutral gear. As a result, the shift mechanism 100 can automatically unlock the positioning of the shift fork 3 without introducing a control device for unlocking the shift fork 3, thereby reducing the number of components and facilitating the reduction of layout difficulty and cost.

[0087] In some embodiments of the present invention, Figure 2-Figure 10 As shown, the second housing 6 is provided with a second driving oil port 63 connected with the driving oil supply system. The second driving oil port 63 is located on the side of the second lubricating oil inlet 61 away from the first housing 5. The driving oil provided by the driving oil supply system can enter the second driving oil chamber 62 through the second driving oil port 63. The second driving oil port 63 and the second driving oil chamber 62 are both located on the side of the second lubricating oil inlet 61 away from the first housing 5, thereby ensuring the driving effect of the driving oil in the second driving oil chamber 62 on the fork 3.

[0088] Furthermore, the second end 34 is provided with a second mounting groove 36, and a second connecting hole 361 connected to the second driving oil chamber 62 is provided on the side wall of the second mounting groove 36. The second self-locking structure 8 is arranged in the second mounting groove 36. After the shifting of the shift fork 3 and the second gear 2 is completed, the notch of the second mounting groove 36 is opposite to the second driving oil port 63, and the second self-locking structure 8 is suitable for extending into the second driving oil port 63.

[0089] It can be understood that during the shifting process between the shift fork 3 and the second gear 2, the second self-locking structure 8 is located in the second mounting groove 36, which can ensure the movement of the shift fork 3 in the first direction to achieve the shifting. After the shifting between the shift fork 3 and the second gear 2 is completed, the second self-locking structure 8 in the second mounting groove 36 extends into the second drive oil port 63, and at this time, the second drive oil port 63 can produce a positioning and limiting effect on the second self-locking structure 8, so that the shift fork 3 and the second housing 6 cannot produce relative movement in the first direction. The structure is simple and easy to implement, and can ensure the stability of the cooperation between the shift fork 3 and the second gear 2, thereby avoiding the phenomenon of automatic shifting and automatic disengagement of the gear-engaging mechanism, and further enhancing the stability and reliability of the gear-engaging mechanism.

[0090] In some embodiments of the present invention, Figure 2-Figure 10 As shown, the second self-locking structure 8 includes a second self-locking pin 81 and a second elastic member 82. The second self-locking pin 81 is movable along the depth direction of the second mounting groove 36. The second elastic member 82 is arranged in the second mounting groove 36 and is located between the second self-locking pin 81 and the bottom wall of the second mounting groove 36, and is used to drive the second self-locking pin 81 to move toward the second driving oil port 63.

[0091] It can be understood that during the shifting process between the shift fork 3 and the second gear 2, the second self-locking pin 81 and the second elastic member 82 are located in the second mounting groove 36, the second elastic member 82 is in a compressed state, and the end of the second self-locking pin 81 that is away from the second elastic member 82 is against the inner wall of the second box body 6, which can ensure the movement of the shift fork 3 in the first direction to achieve shifting.

[0092] After the shift fork 3 and the second gear 2 are shifted, the notch of the second mounting groove 36 is directly opposite to the second driving oil port 63, the second elastic member 82 is extended, and the second elastic member 82 in the compressed state pushes the second self-locking pin 81 to move toward the second driving oil port 63, so that at least part of the second self-locking pin 81 extends into the second driving oil port 63. At this time, the second driving oil port 63 can produce a positioning and limiting effect on the second self-locking pin 81, so that the shift fork 3 and the second housing 6 cannot produce relative movement in the first direction. The structure is simple and easy to implement, and the automatic positioning and locking of the shift fork 3 can be achieved, and the stability of the matching between the shift fork 3 and the second gear 2 can be ensured, so as to avoid the phenomenon of automatic shifting and automatic disengagement of the shifting mechanism, thereby enhancing the stability and reliability of the shifting mechanism. And there is no need to introduce a control device for locking the shift fork 3, so that the number of parts is reduced, which is conducive to reducing the difficulty and cost of layout.

[0093] In the present application, when the shift fork 3 shifts from the second gear 2 to the neutral gear, the driving oil provided by the driving oil supply system can generate thrust on the second self-locking pin 81 at the second driving oil port 63, and the second self-locking pin 81 then generates pressure on the second elastic member 82, so that the second elastic member 82 is shortened and the second self-locking pin 81 moves toward the second elastic member 82. When the second self-locking pin 81 is completely moved into the second mounting groove 36 and continues to move toward the second elastic member 82, the second connecting hole 361 is connected with the second driving oil port 63. At this time, the driving oil can enter the second driving oil chamber 62 from the second connecting hole 361, thereby providing driving force for the movement of the shift fork 3 in the first direction, thereby providing power for the shift fork 3 to shift from the second gear 2 to the neutral gear. As a result, the shift mechanism 100 can automatically unlock the positioning of the shift fork 3 without introducing a control device for unlocking the shift fork 3, thereby reducing the number of components and facilitating the reduction of layout difficulty and cost.

[0094] In some embodiments of the present invention, Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, a first sealing ring 54 is provided between the inner circumferential wall of the first housing 5 and the outer circumferential wall of the first end 33, and the first sealing ring 54 is located on the side of the first lubricating oil inlet 51 close to the second housing 6. The first sealing ring 54 realizes an interference fit between the inner circumferential wall of the first housing 5 and the outer circumferential wall of the first end 33, which can prevent a small amount of lubricating oil entering from the first lubricating oil inlet 51 between the inner circumferential wall of the first housing 5 and the outer circumferential wall of the first end 33 from leaking out, thereby ensuring the airtightness and stability of the shift mechanism 100.

[0095] In some embodiments of the present invention, Figure 2 , Figure 4 , Figure 6 and Figure 8As shown, a second sealing ring 64 is provided between the inner circumferential wall of the second housing 6 and the outer circumferential wall of the second end 34, and the second sealing ring 64 is located on the side of the second lubricating oil inlet 61 facing the first housing 5. The second sealing ring 64 realizes an interference fit between the inner circumferential wall of the second housing 6 and the outer circumferential wall of the second end 34, which can prevent a small amount of lubricating oil from entering the inner circumferential wall of the second housing 6 from the second lubricating oil inlet 61 and leaking between the outer circumferential wall of the second end 34, thereby ensuring the airtightness and stability of the shift mechanism 100.

[0096] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, the shift fork 3 includes a fork body 37 and a fork angle 38, the fork body 37 extends along a first direction, one end of the fork angle 38 is connected to the fork body 37 and is located between the first gear 1 and the second gear 2, and the shift mechanism 100 also includes a synchronizer 9, the synchronizer 9 includes a synchronization sleeve 91, the synchronization sleeve 91 is connected to the other end of the fork angle 38 and is suitable for cooperating with the first gear 1 or the second gear 2.

[0097] It can be understood that the shift fork 3 is matched with the first gear 1 or the second gear 2 through the synchronizer 9, and the synchronizer 9 also includes a first synchronizer ring 92 matched with the synchronizer sleeve 91. The first gear 1 is provided with a first combination tooth 11 on the side facing the second gear 2, and the first combination tooth 11 and the first synchronizer ring 92 are both provided with friction cone surfaces that can match each other. When the shift fork 3 is shifted toward the first gear 1, the shift fork 3 drives the synchronizer sleeve 91 to move from the second end 34 to the first end 33, and the synchronizer sleeve 91 drives the first synchronizer ring 92 to move from the second end 34 to the first end 33, so that the friction cone surfaces of the first combination tooth 11 and the first synchronizer ring 92 are attached and form friction, and finally the first combination tooth 11 and the first synchronizer ring 92 are synchronized in speed, so that the synchronizer sleeve 91 can smoothly continue to move in the first direction and mesh with the first combination tooth 11, thereby completing the shift of the shift fork 3 toward the first gear 1. The structure is simple and the layout is reasonable, which can ensure the operation stability of the shift mechanism 100.

[0098] Similarly, the synchronizer 9 also includes a second synchronizer ring 93 that cooperates with the synchronizer sleeve 91. The second coupling tooth 21 is provided on the side of the second gear 2 that faces the first gear 1. The second coupling tooth 21 and the second synchronizer ring 93 are both provided with friction cone surfaces that can match each other. When the shift fork 3 shifts toward the second gear 2, the shift fork 3 drives the synchronizer sleeve 91 to move from the first end 33 to the second end 34, and the synchronizer sleeve 91 drives the second synchronizer ring 93 to move from the first end 33 to the second end 34, so that the friction cone surfaces of the second coupling tooth 21 and the second synchronizer ring 93 are attached to each other and form friction, and finally the second coupling tooth 21 and the second synchronizer ring 93 are synchronized in speed, so that the synchronizer sleeve 91 can smoothly continue to move in the first direction and mesh with the second coupling tooth 21, thereby completing the shift of the shift fork 3 toward the second gear 2. The structure is simple and the layout is reasonable, which can ensure the operation stability of the shift mechanism 100.

[0099] Furthermore, the first oil channel 31 and the second oil channel 32 are both arranged on the fork body 37, the first oil outlet 311 is arranged adjacent to the fork angle 38 and is located on the side of the fork angle 38 facing the first gear 1, and the second oil outlet 321 is arranged adjacent to the fork angle 38 and is located on the side of the fork angle 38 facing the second gear 2.

[0100] During the shifting process, a large amount of heat is mainly generated when the friction cone surfaces of the first coupling tooth 11 and the first synchronizer ring 92 are in contact and rub against each other, and a large amount of heat is generated when the friction cone surfaces of the second coupling tooth 21 and the second synchronizer ring 93 are in contact and rub against each other. The lubricating oil in the first oil passage 31 can drip onto the synchronizer 9 and the first gear 1 located on the side of the fork angle 38 facing the first gear 1 after flowing out from the first oil outlet 311, and the lubricating oil in the second oil passage 32 can drip onto the synchronizer 9 and the second gear 2 located on the side of the fork angle 38 facing the second gear 2 after flowing out from the second oil outlet 321. In this way, the lubricating oil can drip onto the required parts and perform targeted lubrication and cooling, and at the same time, it can avoid the problem that the lubricating oil is blocked by the synchronizer sleeve 91 or the shift fork 3, resulting in poor lubrication effect.

[0101] In some embodiments, when the shift fork 3 is shifting toward the first gear 1, the docking interface between the first lubricating oil inlet 51 and the first oil inlet 312 gradually increases during the process of the shift fork 3 moving in the direction from the second end 34 to the first end 33, and the lubricating oil flow rate gradually increases. At the stage when lubrication is most needed, that is, when the friction cone surfaces of the first coupling tooth 11 and the first synchronizer ring 92 are in contact and friction is formed to generate a large amount of heat, the amount of lubricating oil flowing out of the first oil outlet 311 reaches a maximum. As the shift fork 3 continues to move in the direction from the second end 34 to the first end 33, the synchronization process gradually reaches the stage of the synchronization gear sleeve 91 and the first coupling tooth 11 engaging and the stage of the shift fork 3 stopping slipping. The docking interface between the first lubricating oil inlet 51 and the first oil inlet 312 gradually decreases, and the amount of lubricating oil decreases. When the gear is engaged, the synchronizer 9 and the first gear 1 no longer need lubrication, and the shift fork 3 reaches Figure 6 Position, the first oil inlet 312 is automatically closed and no longer inlet oil, and the first oil inlet 312 also stops lubricating the synchronizer 9 and the first gear 1. At the same time, the second oil inlet 322 is always in a closed state, thereby achieving the purpose of targeted lubrication of the parts that need lubrication.

[0102] In some embodiments of the present invention, Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, the first oil passage 31 is located on the side of the fork angle 38 facing the first gear 1 and extends along the length direction of the fork body 37. The first oil inlet 312 and the first oil outlet 311 can be located at both ends of the first oil passage 31 in the first direction, which is conducive to the lubricating oil entering and flowing out of the first oil passage 31, and it is convenient to arrange the first oil outlet 311 adjacent to the fork angle 38 and located on the side of the fork angle 38 facing the first gear 1, and it is convenient to realize the automatic opening and closing of the first oil inlet 312, so as to ensure the lubrication effect and the structural design is reasonable.

[0103] In some embodiments of the present invention, Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, the second oil passage 32 is located on the side of the fork angle 38 facing the second gear 2 and extends along the length direction of the fork body 37. The second oil inlet 322 and the second oil outlet 321 can be located at both ends of the second oil passage 32 in the first direction, which is conducive to the lubricating oil entering and flowing out of the second oil passage 32, and it is convenient to arrange the second oil outlet 321 adjacent to the fork angle 38 and located on the side of the fork angle 38 facing the first gear 1, and it is convenient to realize the automatic opening and closing of the second oil inlet 322, so as to ensure the lubrication effect and the structural design is reasonable.

[0104] In some embodiments of the present invention, Figure 2 , Figure 4, Figure 6 and Figure 8 As shown, there are one or more first oil outlets 311, and the number of the first oil outlets 311 can be adjusted accordingly according to the actual demand for lubricating oil in a specific embodiment, so as to achieve precise control of the flow of lubricating oil during the shifting process, thereby better ensuring the lubrication effect. Figure 2 , Figure 4 , Figure 6 and Figure 8 In the specific embodiment shown, there are two first oil outlets 311 . Of course, there may also be one, three or four first oil outlets 311 , and this application does not make any specific limitation on this.

[0105] In some embodiments of the present invention, Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, there are one or more second oil outlets 321, and the number of the second oil outlets 321 can be adjusted accordingly according to the actual demand for lubricating oil in a specific embodiment, so as to achieve precise control of the lubricating oil flow rate during the shifting process, thereby better ensuring the lubrication effect. Figure 2 , Figure 4 , Figure 6 and Figure 8 In the specific embodiment shown, there are two second oil outlets 321 . Of course, there may also be one, three or four second oil outlets 321 , and this application does not make any specific limitation on this.

[0106] The transmission according to the embodiment of the present invention includes: the above-mentioned shifting mechanism 100 .

[0107] According to the transmission of the embodiment of the present invention, by setting the first oil passage 31 and the second oil passage 32 in the shift fork 3 movable in the first direction, the first oil outlet 311 of the first oil passage 31 is used to supply oil to the side of the first gear 1 facing the second gear 2, and the second oil outlet 321 of the second oil passage 32 is used to supply oil to the side of the second gear 2 facing the first gear 1, and the first oil inlet 312 of the first oil passage 31 and the second oil inlet 322 of the second oil passage 32 can be automatically opened during the shifting process, and automatically closed before and at the end of the shifting, so that the lubricating oil can take away the heat generated by the friction between the first gear 1, the second gear 2 and the shift fork 3, ensure the lubrication and cooling effect, avoid the failure of the shift mechanism 100 due to thermal decay, and reduce the wear between the components, thereby extending the service life of the shift mechanism 100 and the transmission. Moreover, the circulation and disconnection of the lubricating oil can be realized without the participation of any control mechanism such as a solenoid valve, etc., while ensuring the lubrication effect, the cost of the shift mechanism 100 can be greatly saved, thereby reducing the cost of the transmission.

[0108] An electric assembly according to an embodiment of the present invention includes: the above-mentioned transmission.

[0109] According to the electric assembly of the embodiment of the present invention, by arranging the first oil channel 31 and the second oil channel 32 in the shift fork 3 movable along the first direction, the first oil outlet 311 of the first oil channel 31 is used to supply oil to the side of the first gear 1 facing the second gear 2, and the second oil outlet 321 of the second oil channel 32 is used to supply oil to the side of the second gear 2 facing the first gear 1. At the same time, the first oil inlet 312 of the first oil channel 31 and the second oil inlet 322 of the second oil channel 32 can be automatically opened during the gear shifting process, and automatically closed before and at the end of the gear shifting, so that the lubricating oil can take away the heat generated during the friction between the first gear 1, the second gear 2 and the shift fork 3, thereby ensuring the lubrication and cooling effects, avoiding the failure of the shift mechanism 100 due to thermal decay, and reducing the wear between the components, thereby extending the service life of the shift mechanism 100 and the transmission, and further extending the service life of the electric assembly. The circulation and disconnection of the lubricating oil can be achieved without the involvement of any control mechanism such as a solenoid valve, which can greatly save the cost of the shift mechanism 100 and the transmission while ensuring the lubrication effect, thereby reducing the cost of the electric assembly.

[0110] A vehicle according to an embodiment of the present invention will be described below.

[0111] A vehicle according to an embodiment of the present invention includes: the above-mentioned electric assembly.

[0112] Specifically, Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, the shift mechanism 100 includes a first gear 1, a second gear 2 and a shift fork 3. The first gear 1 and the second gear 2 are arranged at intervals along a first direction. The shift fork 3 is movable along the first direction and is used to cooperate with the first gear 1 or the second gear 2. The shift fork 3 is suitable for connecting with the shift lever of the vehicle. When the driver of the vehicle operates the shift lever, the shift lever drives the shift fork 3 to move in the first direction, driving the shift fork 3 to move toward the direction close to the first gear 1 or the second gear 2, so that the shift fork 3 cooperates with the first gear 1 or the second gear 2 to achieve the purpose of gear switching and finally realize the function of shifting.

[0113] The shift fork 3 has a first oil passage 31 and a second oil passage 32. The first oil outlet 311 of the first oil passage 31 is used to supply oil to the side of the first gear 1 facing the second gear 2, and the second oil outlet 321 of the second oil passage 32 is used to supply oil to the side of the second gear 2 facing the first gear 1. The first oil inlet 312 of the first oil passage 31 is automatically opened during the shifting process to the first gear 1, and is automatically closed before the shifting to the first gear 1 and after the shifting is completed; the second oil inlet 322 of the second oil passage 32 is automatically opened during the shifting process to the second gear 2, and is automatically closed before the shifting to the second gear 2 and after the shifting is completed.

[0114] It can be understood that the first oil channel 31 and the second oil channel 32 are used for the circulation of lubricating oil. In the first direction, the first oil inlet 312 and the first oil outlet 311 can be located at the two ends of the first oil channel 31 respectively, and the second oil inlet 322 and the second oil outlet 321 can be located at the two ends of the second oil channel 32 respectively.

[0115] When the shift fork 3 moves toward the first gear 1 and cooperates with the first gear 1 to achieve gear shifting, the side of the first gear 1 facing the second gear 2 will generate severe friction and a large amount of heat. At this time, the first oil inlet 312 is automatically opened, and the first oil channel 31 is connected to the lubricating oil supply system. The lubricating oil can enter the first oil channel 31 from the first oil inlet 312, and flow out from the first oil outlet 311 after flowing through the first oil channel 31, and flow to the side of the first gear 1 facing the second gear 2. Therefore, the heat generated during the friction between the first gear 1 and the shift fork 3 can be taken away by the flowing lubricating oil, thereby reducing the temperature of the side of the first gear 1 facing the second gear 2, and avoiding the failure of the first gear 1 and the shift fork 3 due to thermal decay. It can also reduce the wear of the first gear 1 and other components, thereby extending the service life of the shift mechanism 100. When the shift process of the shift fork 3 and the first gear 1 is completed, the first oil inlet 312 is automatically closed to reduce the oil supply pressure and avoid resource waste.

[0116] Similarly, when the shift fork 3 moves toward the second gear 2 and cooperates with the second gear 2 to achieve the shift, the side of the second gear 2 facing the first gear 1 will generate severe friction and a large amount of heat. At this time, the second oil inlet 322 is automatically opened, and the second oil channel 32 is connected to the lubricating oil supply system. The lubricating oil can enter the second oil channel 32 from the second oil inlet 322, and flow out from the second oil outlet 321 after flowing through the second oil channel 32, and flow to the side of the second gear 2 facing the second gear 2. Therefore, the heat generated between the second gear 2 and the shift fork 3 during the friction process can be taken away by the flowing lubricating oil, thereby reducing the temperature of the side of the second gear 2 facing the second gear 2, and avoiding the failure of the second gear 2 and the shift fork 3 due to thermal decay. It can also reduce the wear of the second gear 2 and other components, thereby extending the service life of the shift mechanism 100. When the shift process of the shift fork 3 and the second gear 2 is completed, the second oil inlet 322 is automatically closed, which can reduce the oil supply pressure and avoid resource waste.

[0117] Among them, when the fork 3 moves along the first direction, the first oil inlet 312 and the second oil inlet 322 can be automatically opened during the gear shifting process, and automatically closed before and at the end of the gear shifting. The circulation and disconnection of the lubricating oil can be achieved without the participation of any control mechanism such as a solenoid valve. While ensuring the lubrication effect, the cost of the gear shifting mechanism 100 can be greatly saved.

[0118] According to the vehicle of the embodiment of the present invention, by setting the first oil passage 31 and the second oil passage 32 in the shift fork 3 movable in the first direction, the first oil outlet 311 of the first oil passage 31 is used to supply oil to the side of the first gear 1 facing the second gear 2, and the second oil outlet 321 of the second oil passage 32 is used to supply oil to the side of the second gear 2 facing the first gear 1, and the first oil inlet 312 of the first oil passage 31 and the second oil inlet 322 of the second oil passage 32 can be automatically opened during the shifting process, and automatically closed before and at the end of the shifting, so that the lubricating oil can take away the heat generated by the friction between the first gear 1, the second gear 2 and the shift fork 3, ensure the lubrication and cooling effect, avoid the failure of the shift mechanism 100 due to thermal decay, and reduce the wear between the components, thereby extending the service life of the shift mechanism 100 and the electric assembly. Moreover, the circulation and disconnection of the lubricating oil can be realized without the participation of any control mechanism such as a solenoid valve, etc., while ensuring the lubrication effect, the cost of the shift mechanism 100 and the electric assembly can be greatly saved, thereby reducing the cost of the vehicle.

[0119] Other components of the shift mechanism 100 according to the embodiment of the present invention, such as the synchronizer 9 , are known to those skilled in the art and will not be described in detail here.

[0120] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0121] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A gear shifting mechanism, characterized in that: include: A first gear gear and a second gear gear, wherein the first gear gear and the second gear gear are arranged at intervals along a first direction; a shift fork, the shift fork being movable along the first direction and being used to cooperate with the first gear or the second gear, the shift fork having a first oil passage and a second oil passage, the first oil outlet of the first oil passage being used to supply oil to a side of the first gear facing the second gear, and the second oil outlet of the second oil passage being used to supply oil to a side of the second gear facing the first gear, The first oil inlet of the first oil passage is automatically opened during the gear shifting process to the first gear, and is automatically closed before the gear shifting process to the first gear and at the end of the gear shifting process; The second oil inlet of the second oil passage is automatically opened during the gear shifting process to the second gear, and is automatically closed before the gear shifting process to the second gear and after the gear shifting is completed.

2. The shift mechanism according to claim 1, characterized in that: The two ends of the shift fork along the first direction are respectively a first end and a second end, and the shift mechanism further includes: Lubricating oil pipeline, used for connecting with the lubricating oil supply system; a first box body, wherein the inner wall of the first box body is provided with a first lubricating oil inlet connected to the lubricating oil pipeline, the first end of the shift fork extends into the first box body and is movable along the first direction, and the first oil inlet is located in the first box body and faces the first lubricating oil inlet; a second box, the second box being spaced apart from the first box along the first direction, the inner wall of the second box being provided with a second lubricating oil inlet connected to the lubricating oil pipeline, the second end of the shift fork extending into the second box and movable along the first direction, the second oil inlet being located in the second box and facing the second lubricating oil inlet; Along the first direction, when the shift fork is not shifting toward the first gear and the second gear, the first oil inlet and the second oil inlet are located between the first lubricating oil inlet and the second lubricating oil inlet, and after the shift fork and the first gear are shifted, the first oil inlet is located on the side of the first lubricating oil inlet away from the second lubricating oil inlet, and after the shift fork and the second gear are shifted, the second oil inlet is located on the side of the second lubricating oil inlet away from the first lubricating oil inlet.

3. The shift mechanism according to claim 2, characterized in that: The shape of the first oil inlet is the same as that of the first lubricating oil inlet, and the cross-sectional area of ​​the first oil inlet is larger than the cross-sectional area of ​​the first lubricating oil inlet; And / or, a shape of the second oil inlet is the same as a shape of the second lubricating oil inlet, and a cross-sectional area of ​​the second oil inlet is larger than a cross-sectional area of ​​the second lubricating oil inlet.

4. The shift mechanism according to claim 2, characterized in that: A first driving oil chamber is formed between the first box and the side of the first end facing away from the second end, and a second driving oil chamber is formed between the second box and the side of the second end facing away from the first end. The first driving oil chamber and the second driving oil chamber are suitable for being connected to a driving oil supply system.

5. The shift mechanism according to claim 4, characterized in that: Also includes: a first self-locking structure, which is disposed at the first end and is adapted to cooperate with the first housing and is used to position the shift fork after the shift fork has finished shifting to the first gear; A second self-locking structure is provided at the second end and is suitable for cooperating with the second housing, and is used for positioning the shift fork after the shift fork has finished shifting to the second gear.

6. The shift mechanism according to claim 5, characterized in that: The first housing is provided with a first driving oil port connected to the driving oil supply system, and the first driving oil port is located on a side of the first lubricating oil inlet away from the second housing. The first end is provided with a first mounting groove, and a first connecting hole connected with the first driving oil chamber is provided on a side wall of the first mounting groove. The first self-locking structure is arranged in the first mounting groove. After the shifting of the shift fork and the first gear is completed, the notch of the first mounting groove is opposite to the first driving oil port, and the first self-locking structure is suitable for extending into the first driving oil port.

7. The shift mechanism according to claim 6, characterized in that: The first self-locking structure comprises: a first self-locking pin, wherein the first self-locking pin is movable along a depth direction of the first mounting groove; A first elastic member is disposed in the first mounting groove and between the first self-locking pin and the bottom wall of the first mounting groove, and is used for driving the first self-locking pin to move toward the first driving oil port.

8. The shift mechanism according to claim 5, characterized in that: The second housing is provided with a second driving oil port connected to the driving oil supply system, and the second driving oil port is located on a side of the second lubricating oil inlet away from the first housing. The second end is provided with a second mounting groove, and a second communicating hole communicating with the second driving oil chamber is provided on a side wall of the second mounting groove. The second self-locking structure is arranged in the second mounting groove. After the shifting of the shift fork and the second gear is completed, the notch of the second mounting groove is opposite to the second driving oil port, and the second self-locking structure is suitable for extending into the second driving oil port.

9. The shift mechanism according to claim 8, characterized in that: The second self-locking structure comprises: a second self-locking pin, wherein the second self-locking pin is movable along a depth direction of the second mounting groove; A second elastic member is disposed in the second mounting groove and between the second self-locking pin and the bottom wall of the second mounting groove, and is used for driving the second self-locking pin to move toward the second driving oil port.

10. The shift mechanism according to claim 2, characterized in that: A first sealing ring is provided between the inner peripheral wall of the first housing and the outer peripheral wall of the first end, and the first sealing ring is located on a side of the first lubricating oil inlet facing the second housing; And / or, a second sealing ring is provided between the inner peripheral wall of the second housing and the outer peripheral wall of the second end, and the second sealing ring is located on the side of the second lubricating oil inlet facing the first housing.

11. The shift mechanism according to claim 1, characterized in that: The shift fork comprises a fork body and a fork angle, wherein the fork body extends along the first direction, and one end of the fork angle is connected to the fork body and is located between the first gear and the second gear. The shift mechanism further includes a synchronizer, and the synchronizer includes a synchronizer sleeve, the synchronizer sleeve is connected to the other end of the fork angle and is suitable for cooperating with the first gear or the second gear. The first oil passage and the second oil passage are both arranged on the fork body, the first oil outlet is arranged adjacent to the fork angle and located on the side of the fork angle facing the first gear, and the second oil outlet is arranged adjacent to the fork angle and located on the side of the fork angle facing the second gear.

12. The shift mechanism according to claim 11, characterized in that: The first oil passage is located at a side of the fork angle facing the first gear and extends along the length direction of the fork body; and / or, the second oil passage is located at a side of the fork angle facing the second gear and extends along the length direction of the fork body; and / or, the first oil outlet is one or more; And / or, the second oil outlet is one or more.

13. A transmission, characterized in that: It comprises a shift mechanism according to any one of claims 1-12.

14. An electric assembly, characterized in that: Comprising a transmission according to claim 13.

15. A vehicle, characterized in that: Comprising an electric powertrain assembly according to claim 14.

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