Transmission, powertrain, and vehicle

Abstract

A transmission (100), comprising a bearing mounting seat (11). An oil spray flow channel (111) is formed in the bearing mounting seat; the oil spray flow channel (111) has a first oil spray port (112) and a second oil spray port (113); a first central axis (1121) of the first oil spray port is located between an inner ring and an outer ring of a first bearing element (20); a second central axis (1131) of the second oil spray port is located between an inner ring and an outer ring of a second bearing element (30); the separation distance between the first central axis (1121) and the inner ring of the first bearing element (20) is smaller than the separation distance between the first central axis (1121) and the outer ring of the first bearing element (20); and the separation distance between the second central axis (1131) and the inner ring of the second bearing element (30) is larger than the separation distance between the second central axis (1131) and the outer ring of the second bearing element (30). Further provided are a powertrain (300) comprising the transmission and a vehicle (400) comprising the powertrain.

Description

Transmission, powertrain and vehicle

[0001] Cross-reference to related applications

[0002] The present application is based on and claims priority to Chinese Patent Application No. 202411062734.2, filed on August 5, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of transmissions, and in particular to a transmission, a powertrain and a vehicle. BACKGROUND

[0004] In related technologies, a transmission includes a box body and a bearing, the bearing is arranged in the box body, the box body is provided with an oil dripping pipe, and the bearing is lubricated by dripping oil through an oil dripping port of the oil dripping pipe. However, when the bearing rotates, the lubricating oil is easy to scatter and not easy to adhere to the surface of the bearing, and the lubricating oil is easy to be blocked by the high-speed airflow around the bearing and cannot enter the bearing, which is not conducive to the lubrication of the bearing, affects the lubrication effect of the bearing, and reduces the service life of the bearing. SUMMARY

[0005] The present application aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, one object of the present application is to provide a transmission, which is conducive to spraying lubricating oil into a first bearing member and a second bearing member, improving the lubrication effect of the first bearing member and the second bearing member, and prolonging the service life of the first bearing member and the second bearing member.

[0007] Another object of the present application is to provide a powertrain.

[0008] Another object of the present application is to provide a vehicle.

[0009] According to the transmission of the present application, comprising:

[0010] a box body, the box body having a bearing mounting seat;

[0011] The first bearing part and the second bearing part are respectively located on opposite sides of the bearing mounting seat, the bearing mounting seat is formed with an oil injection flow channel, the oil injection flow channel has a first oil injection opening open towards the first bearing part and a second oil injection opening open towards the second bearing part, a first central axis of the first oil injection opening and a second central axis of the second oil injection opening both extend along the arrangement direction of the first bearing part and the second bearing part, the first central axis is located between the inner ring and the outer ring of the first bearing part, the second central axis is located between the inner ring and the outer ring of the second bearing part, and the interval distance between the first central axis and the inner ring of the first bearing part is smaller than the interval distance between the first central axis and the outer ring of the first bearing part, and the interval distance between the second central axis and the inner ring of the second bearing part is greater than the interval distance between the second central axis and the outer ring of the second bearing part.

[0012] According to the transmission of the application, by arranging the oil injection flow channel, the lubricating oil can be injected into the first bearing part and the second bearing part, the lubricating effect of the first bearing part and the second bearing part is improved, and the service life of the first bearing part and the second bearing part is prolonged.

[0013] The power assembly according to the application comprises the transmission described above.

[0014] The power assembly according to the application comprises the transmission described above, by arranging the transmission in the power assembly, the service life of the transmission is prolonged, and thus the use reliability of the power assembly can be improved.

[0015] The vehicle according to the application comprises the power assembly described above.

[0016] The vehicle according to the application comprises the power assembly described above, and the use reliability of the vehicle can be improved

[0017] Additional aspects and advantages of the application will be made apparent by the following description and the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic view of a box according to an embodiment of the application;

[0019] Fig. 2 is another angle schematic view of the box according to an embodiment of the application;

[0020] Fig. 3 is a schematic view of an assembly of a transmission and a motor according to an embodiment of the application;

[0021] Fig. 4 is another angle schematic view of the assembly of the transmission and the motor according to an embodiment of the application;

[0022] Fig. 5 is a sectional view along A-A in Fig. 4;

[0023] Fig. 6 is an enlarged view of B in Fig. 5;

[0024] Fig. 7 is an enlarged view of C in Fig. 6;

[0025] Fig. 8 is a schematic view of a filling structure according to an embodiment of the present application;

[0026] Fig. 9 is a schematic view of an assembly of a filling structure and a boss structure according to an embodiment of the present application;

[0027] Fig. 10 is a schematic view of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which like or similar elements or components are denoted by like reference numbers throughout the several views. The embodiments described below are examples of the present application, which are only for explanation of the present application, and should not be understood as limiting the present application.

[0029] A transmission 100 according to an embodiment of the present application is described below with reference to Figs. 1-10, which can be a structural member of a power assembly 300 of a vehicle 400, the power assembly 300 can be formed by integrating an electric machine 301 and the transmission 100, and the electric machine 301 and the transmission 100 share the same housing 10.

[0030] As shown in Figs. 1-6, the transmission 100 according to an embodiment of the present application includes a housing 10 having a bearing mounting seat 11, first and second bearing members 20 and 30 respectively located on opposite sides of the bearing mounting seat 11, the bearing mounting seat 11 is formed with an oil injection flow channel 111 having a first oil injection opening 112 open toward the first bearing member 20 and a second oil injection opening 113 open toward the second bearing member 30, a first central axis 1121 of the first oil injection opening 112 and a second central axis 1131 of the second oil injection opening 113 both extend along the arrangement direction of the first and second bearing members 20 and 30, the first central axis 1121 is located between the inner and outer rings of the first bearing member 20, the second central axis 1131 is located between the inner and outer rings of the second bearing member 30, and the interval distance between the first central axis 1121 and the inner ring of the first bearing member 20 is less than the interval distance between the first central axis 1121 and the outer ring of the first bearing member 20, and the interval distance between the second central axis 1131 and the inner ring of the second bearing member 30 is greater than the interval distance between the second central axis 1131 and the outer ring of the second bearing member 30.

[0031] The box body 10 can be made of a metal material, the box body 10 can define a mounting space 13, the bearing mounting seat 11 is located in the mounting space 13, the bearing mounting seat 11 can separate the mounting space 13 into a first space 131 and a second space 132, the first space 131 is used for installing the structure of the transmission, and the second space 132 is used for installing the structural member of the motor 301. The first bearing member 20 and the second bearing member 30 are located on opposite sides of the bearing mounting seat 11 respectively, the first bearing member 20 can be located in the first space 131, the second bearing member 30 can be located in the second space 132, the first bearing member 20 and the second bearing member 30 are both arranged on the bearing mounting seat 11, further, the outer ring of the first bearing member 20 is fixedly arranged on the bearing mounting seat 11, the outer ring of the second bearing member 30 is fixedly arranged on the bearing mounting seat 11, and the outer ring of the first bearing member 20 and the outer ring of the second bearing member 30 can be mounted in interference fit with the bearing mounting seat 11. The second bearing member 30 can be a motor bearing, the inner ring of the second bearing member 30 can be sleeved on the motor shaft 302 of the motor 301 and fixedly connected with the motor shaft 302, so that the motor shaft 302 is rotatably arranged on the box body 10. The motor shaft 302 is connected with the main shaft 201, the first bearing member 20 can be a main shaft bearing, the inner ring of the first bearing member 20 can be sleeved on the main shaft 201 and fixedly connected with the main shaft 201, so that the main shaft 201 is rotatably arranged on the box body 10. When the motor shaft 302 rotates, the main shaft 201 can be driven to rotate.

[0032] The bearing mounting seat 11 is formed with an oil injection flow channel 111, the oil injection flow channel 111 can be located between the first bearing member 20 and the second bearing member 30, the oil injection flow channel 111 has a first oil injection port 112 and a second oil injection port 113, the first oil injection port 112 is open towards the first bearing member 20, the second oil injection port 113 is open towards the second bearing member 30, the first oil injection port 112 and the second oil injection port 113 can be configured as circular holes, the cross-sectional shape of the first oil injection port 112 and the cross-sectional shape of the second oil injection port 113 can both be polygonal, for example, the cross-sectional shape of the first oil injection port 112 and the cross-sectional shape of the second oil injection port 113 can both be equilateral triangles, regular quadrilaterals, etc.

[0033] The first center axis 1121 of the first oil injection port 112 and the second center axis 1131 of the second oil injection port 113 both extend along the arrangement direction of the first bearing 20 and the second bearing 30, which is the X direction in FIG. 5 when the transmission 100 is placed in the direction in FIG. 5. The first center axis 1121 is located between the inner ring and the outer ring of the first bearing 20, in other words, the orthogonal projection of the first center axis 1121 is located between the orthogonal projection of the inner ring of the first bearing 20 and the orthogonal projection of the outer ring of the first bearing 20 along the arrangement direction of the first bearing 20 and the second bearing 30. The second center axis 1131 is located between the inner ring and the outer ring of the second bearing 30 along the arrangement direction of the first bearing 20 and the second bearing 30, in other words, the orthogonal projection of the second center axis 1131 is located between the orthogonal projection of the inner ring of the second bearing 30 and the orthogonal projection of the outer ring of the second bearing 30 along the arrangement direction of the first bearing 20 and the second bearing 30. By locating the first center axis 1121 between the inner ring and the outer ring of the first bearing 20 and locating the second center axis 1131 between the inner ring and the outer ring of the second bearing 30, the lubricating oil flowing into the oil injection channel 111 is sprayed out from the first oil injection port 112 and the second oil injection port 113, which is conducive to the lubricating oil sprayed out from the first oil injection port 112 flowing into the first bearing 20 and the lubricating oil sprayed out from the second oil injection port 113 flowing into the second bearing 30, effectively lubricating the first bearing 20 and the second bearing 30 when they rotate at high speed, improving the lubrication effect of the first bearing 20 and the second bearing 30, prolonging the service life of the first bearing 20 and the second bearing 30, and the oil injection channel 111 of the present application can simultaneously lubricate the first bearing 20 and the second bearing 30, which is conducive to simplifying the structure of the box 10 and reducing the manufacturing difficulty of the box 10.

[0034] As shown in FIG. 7, along the arrangement direction of the inner ring and the outer ring of the first bearing 20, the interval distance L1 between the first center axis 1121 and the inner ring of the first bearing 20 is less than the interval distance L2 between the first center axis 1121 and the outer ring of the first bearing 20, and along the arrangement direction of the inner ring and the outer ring of the second bearing 30, the interval distance L3 between the second center axis 1131 and the inner ring of the second bearing 30 is greater than the interval distance L4 between the second center axis 1131 and the outer ring of the second bearing 30. Such arrangement can increase the manufacturing size of the first bearing 20, which is conducive to improving the structural strength of the first bearing 20, so that the first bearing 20 can be adapted to a motor shaft 302 with higher rotating speed.

[0035] Therefore, by the oil injection flow channel 111 of the present application, the lubricating oil can be injected into the first bearing member 20 and the second bearing member 30, the lubricating effect of the first bearing member 20 and the second bearing member 30 is improved, and the service life of the first bearing member 20 and the second bearing member 30 is prolonged. Moreover, the manufacturing size of the first bearing member 20 can be increased, the structural strength of the first bearing member 20 is improved, and thus the first bearing member 20 can be adapted to the motor shaft 302 with a higher rotating speed.

[0036] In some embodiments of the present application, as shown in FIGS. 5 and 6, the oil injection flow channel 111 extends through the bearing mounting seat 11 along the arrangement direction of the first bearing member 20 and the second bearing member 30, and the two ends of the oil injection flow channel 111 are open to form the first oil injection port 112 and the second oil injection port 113, respectively.

[0037] In some embodiments of the present application, as shown in FIGS. 5 and 6, the oil injection flow channel 111 extends through the bearing mounting seat 11 along the arrangement direction of the first bearing member 20 and the second bearing member 30, and the two ends of the oil injection flow channel 111 are open to form the first oil injection port 112 and the second oil injection port 113, respectively.

[0038] In some embodiments of the present application, as shown in FIGS. 5 and 6, the oil injection flow channel 111 is configured as a straight channel.

[0039] In some embodiments of the present application, as shown in FIGS. 5 and 6, the oil injection flow channel 111 is configured as a straight channel.

[0040] In some embodiments of the present application, the oil injection flow channel 111 is multiple. The multiple oil injection flow channels 111 can be arranged in parallel with each other, and each of the multiple oil injection flow channels 111 has a first oil injection port 112 and a second oil injection port 113. Each of the oil injection flow channels 111 can inject oil to the first bearing member 20 and the second bearing member 30. By simultaneously injecting oil to the first bearing member 20 and the second bearing member 30 through the multiple oil injection flow channels 111, more lubricating oil can flow into the first bearing member 20 and the second bearing member 30 when the first bearing member 20 and the second bearing member 30 rotate, thereby further improving the lubrication effect of the first bearing member 20 and the second bearing member 30, and prolonging the service life of the first bearing member 20 and the second bearing member 30.

[0041] In some embodiments of the present application, the multiple oil injection flow channels 111 are arranged along the circumference of the bearing mounting seat 11. The multiple oil injection flow channels 111 can be uniformly arranged along the circumference of the bearing mounting seat 11, and the multiple oil injection flow channels 111 can be arranged in parallel with each other. The multiple third center axes of the multiple oil injection flow channels 111 can be located on the same circle. Such an arrangement is conducive to uniform lubrication of different positions of the first bearing member 20 and different positions of the second bearing member 30, thereby further improving the lubrication effect of the first bearing member 20 and the second bearing member 30, and prolonging the service life of the first bearing member 20 and the second bearing member 30.

[0042] In some embodiments of the present application, as shown in FIGS. 5 and 6, the box body 10 is further formed with an oil inlet flow channel 12, and the oil inlet flow channel 12 is in communication with the oil injection flow channel 111.

[0043] The oil inlet flow channel 12 is formed in the box body 10, and the oil inlet flow channel 12 is in communication with the oil injection flow channel 111. The lubricating oil flowing into the oil inlet flow channel 12 flows into the oil injection flow channel 111 along the oil inlet flow channel 12, and the lubricating oil flowing into the oil injection flow channel 111 is sprayed out of the first oil injection port 112 and the second oil injection port 113, thereby lubricating the first bearing member 20 and the second bearing member 30. By providing the oil inlet flow channel 12 on the box body 10, the lubricating oil can be conveniently guided to the oil injection flow channel 111, thereby achieving the effect of guiding the lubricating oil to the first oil injection port 112 and the second oil injection port 113.

[0044] In some embodiments of the present application, the oil inlet flow channel 12 can be connected with an oil pump. The oil pump can pump the lubricating oil in the box body 10 into the oil inlet flow channel 12, thereby causing the lubricating oil to be sprayed out of the first oil injection port 112 and the second oil injection port 113.

[0045] In some embodiments of the present application, the oil inlet flow channel 12 is multiple, and the oil injection flow channel 111 is multiple. Each of the oil inlet flow channels 12 is in communication with at least one of the oil injection flow channels 111. By providing multiple oil inlet flow channels 12, the lubricating oil can flow into the multiple oil injection flow channels 111.

[0046] In some embodiments of the present application, the oil inlet flow channel 12 is one, the oil injection flow channel 111 is multiple, and the oil inlet flow channel 12 and the multiple oil injection flow channels 111 are in communication. Such an arrangement is conducive to reducing the number of oil inlet flow channels 12 and facilitating the machining and manufacturing of the box 10.

[0047] In some embodiments of the present application, the oil inlet flow channel 12 is one, the oil injection flow channel 111 is one, and the oil inlet flow channel 12 and the oil injection flow channel 111 are in communication. Such an arrangement is conducive to simplifying the structure of the box 10 and thus improving the production efficiency of the box 10 while meeting the lubrication effect of the first bearing member 20 and the second bearing member 30.

[0048] In some embodiments of the present application, as shown in FIG. 5, the oil inlet flow channel 12 can include a main flow channel 121 and a connecting flow channel 122. The connecting flow channel 122 is connected between the corresponding oil injection flow channel 111 and the main flow channel 121 and communicates the corresponding oil injection flow channel 111 and the main flow channel 121. The main flow channel 121 can extend along the arrangement direction of the first bearing member 20 and the second bearing member 30, the connecting flow channel 122 can extend along the arrangement direction of the inner ring and the outer ring of the first bearing member 20, the main flow channel 121 and the connecting flow channel 122 can be perpendicular, and the oil injection flow channel 111 and the connecting flow channel 122 can be perpendicular. By arranging the main flow channel 121 and the connecting flow channel 122, the lubricating oil can be introduced into the oil injection flow channel 111, and the oil inlet flow channel 12 can be simple and facilitate the machining of the oil inlet flow channel 12.

[0049] In some embodiments of the present application, as shown in FIGS. 5 and 6, the bearing mounting seat 11 is formed with an assembly hole 114 penetrating through the bearing mounting seat 11 along the arrangement direction of the first bearing member 20 and the second bearing member 30. The inner wall of the assembly hole 114 is formed with a boss structure 115. The boss structure 115 is located between the first bearing member 20 and the second bearing member 30, and the boss structure 115 forms the oil injection flow channel 111.

[0050] The bearing mounting seat 11 is formed with an assembly hole 114, the assembly hole 114 penetrates the bearing mounting seat 11 along the arrangement direction of the first bearing piece 20 and the second bearing piece 30, and two open ends of the assembly hole 114 are used for mounting the first bearing piece 20 and the second bearing piece 30 along the arrangement direction of the first bearing piece 20 and the second bearing piece 30. The inner wall of the assembly hole 114 is formed with a boss structure 115, the boss structure 115 is located between the first bearing piece 20 and the second bearing piece 30, the boss structure 115 can limit the first bearing piece 20 and the second bearing piece 30, limit the movement of the first bearing piece 20 to the direction of the second bearing piece 30, and limit the movement of the second bearing piece 30 to the direction of the first bearing piece 20. The boss structure 115 is formed with an oil injection channel 111, the oil injection channel 111 penetrates the boss structure 115 along the arrangement direction of the first bearing piece 20 and the second bearing piece 30, and the oil injection channel 111 is arranged at a reasonable position by being arranged in the boss structure 115, so as to facilitate the injection of lubricating oil into the first bearing piece 20 and the second bearing piece 30.

[0051] In some embodiments of the present application, as shown in FIGS. 5 and 6, the boss structure 115 is annular and arranged along the circumference of the assembly hole 114.

[0052] The boss structure 115 is a closed loop structure, the boss structure 115 is arranged along the circumference of the assembly hole 114, the boss structure 115 defines a first through hole 116, and the motor shaft 302 is arranged in the first through hole 116, so as to facilitate the connection of the motor shaft 302 and the main shaft 201. Moreover, by arranging the boss structure 115 along the circumference of the assembly hole 114, the boss structure 115 can limit the first bearing piece 20 in the entire circumferential direction, so as to make the first bearing piece 20 rotate stably, and the boss structure 115 can also limit the second bearing piece 30 in the entire circumferential direction, so as to make the second bearing piece 30 rotate stably.

[0053] In some embodiments of the present application, as shown in FIGS. 5 and 6, the transmission 100 can further include a filling structure 40, at least one of the filling structure 40 between the first bearing piece 20 and the boss structure 115 and between the second bearing piece 30 and the boss structure 115, the filling structure 40 between the first bearing piece 20 and the boss structure 115 avoids the first oil injection port 112, and the filling structure 40 between the second bearing piece 30 and the boss structure 115 avoids the second oil injection port 113.

[0054] The filling structure 40 can be made of plastic material, and the filling structure 40 can also be made of metal material. The filling structure 40 is taken as an example made of plastic material for description. The filling structure 40 is arranged between the first bearing piece 20 and the boss structure 115, or arranged between the second bearing piece 30 and the boss structure 115, or arranged between the first bearing piece 20 and the boss structure 115 and arranged between the second bearing piece 30 and the boss structure 115. The filling structure 40 is taken as an example arranged between the first bearing piece 20 and the boss structure 115 and arranged between the second bearing piece 30 and the boss structure 115 for description. As an example, two filling structures 40 are arranged between the first bearing piece 20 and the boss structure 115 and between the second bearing piece 30 and the boss structure 115. The filling structure 40 arranged between the first bearing piece 20 and the boss structure 115 avoids the first oil injection port 112, so that the oil injected from the first oil injection port 112 can be smoothly injected into the first bearing piece 20. The filling structure 40 arranged between the second bearing piece 30 and the boss structure 115 avoids the second oil injection port 113, so that the oil injected from the second oil injection port 113 can be smoothly injected into the second bearing piece 30.

[0055] It should be noted that, in the casting process, in order to facilitate the need for mold removal, a gap will be left at the bearing mounting seat 11.

[0056] The filling structure 40 arranged between the first bearing piece 20 and the boss structure 115 can fill the gap between the first bearing piece 20 and the boss structure 115, can prevent the lubricating oil injected from the first oil injection port 112 from flowing into the gap between the first bearing piece 20 and the second bearing piece 30, and can also make the gap between the first bearing piece 20 and the boss structure 115 quickly filled with lubricating oil, which is beneficial to increase the oil injection pressure, so that the lubricating oil can be quickly injected into the first bearing piece 20, and the lubrication effect of the first bearing piece 20 is improved.

[0057] The filling structure 40 arranged between the second bearing piece 30 and the boss structure 115 can fill the gap between the second bearing piece 30 and the boss structure 115, can prevent the lubricating oil injected from the second oil injection port 113 from flowing into the gap between the first bearing piece 20 and the second bearing piece 30, and can also make the gap between the second bearing piece 30 and the boss structure 115 quickly filled with lubricating oil, which is beneficial to increase the oil injection pressure, so that the lubricating oil can be quickly injected into the second bearing piece 30, and the lubrication effect of the second bearing piece 30 is improved.

[0058] In some embodiments of the present application, the filling structure 40 is one, and the filling structure 40 has a first part and a second part, the first part is located between the first bearing piece 20 and the boss structure 115, and the second part is located between the second bearing piece 30 and the boss structure 115.

[0059] In some embodiments of the present application, the filling structure 40 is one, and the filling structure 40 has a first part and a second part, the first part is located between the first bearing piece 20 and the boss structure 115, and the second part is located between the second bearing piece 30 and the boss structure 115.

[0060] In some embodiments of the present application, the filling structure 40 can include a filling structure body 41, a first filling part 42 and a second filling part 43, the first filling part 42 and the second filling part 43 are opposite and spaced apart, the filling structure body 41 is fixedly connected with the first filling part 42 and the second filling part 43, the first filling part 42 is located between the first bearing piece 20 and the boss structure 115, and the second filling part 43 is located between the second bearing piece 30 and the boss structure 115.

[0061] In some embodiments of the present application, the filling structure 40 can include a filling structure body 41, a first filling part 42 and a second filling part 43, the first filling part 42 and the second filling part 43 are opposite and spaced apart, the filling structure body 41 is fixedly connected with the first filling part 42 and the second filling part 43, the first filling part 42 is located between the first bearing piece 20 and the boss structure 115, and the second filling part 43 is located between the second bearing piece 30 and the boss structure 115.

[0062] In some embodiments of the present application, as shown in FIG. 6, the first filling part 42 and the second filling part 43 are annular structures coaxially arranged with the first bearing part 20 and the second bearing part 30, the filling structure body 41, the first filling part 42 and the second filling part 43 are all arc-shaped, the first filling part 42 and the second filling part 43 are both plate-shaped structures, the filling structure body 41 is connected between the inner edge of the first filling part 42 and the inner edge of the second filling part 43, and an included angle is formed between the filling structure body 41 and the first filling part 42 and between the filling structure body 41 and the second filling part 43, so that the filling structure body 41, the first filling part 42 and the second filling part 43 jointly define the mounting groove 44, and at least part of the boss structure 115 is assembled in the mounting groove 44. Among them, the filling structure body 41, the first filling part 42 and the second filling part 43 are all arc-shaped, and the shape of the filling structure body 41, the shape of the first filling part 42 and the shape of the second filling part 43 are matched, and the filling structure body 41, the first filling part 42 and the second filling part 43 can all be circular arc structures. The filling structure body 41 is connected between the inner edge of the first filling part 42 and the inner edge of the second filling part 43, the filling structure body 41 is connected with the first filling part 42 by bending, the filling structure body 41 is connected with the second filling part 43 by bending, a right angle or a similar right angle can be formed between the filling structure body 41 and the first filling part 42, and a right angle or a similar right angle can be formed between the filling structure body 41 and the second filling part 43, so that the filling structure body 41, the first filling part 42 and the second filling part 43 jointly define the mounting groove 44, part of the boss structure 115 is assembled in the mounting groove 44, or the entire structure of the boss structure 115 is assembled in the mounting groove 44, the boss structure 115 can be embedded in the mounting groove 44, so that the filling structure 40 is fixedly arranged on the boss structure 115. Further, the filling structure body 41 is sleeved on the motor shaft 302, which can also be understood as that the motor shaft 302 penetrates through the filling structure body 41, and the filling structure body 41 can abut against and limit the motor shaft 302 to reduce the risk of shaking of the motor shaft 302 during rotation.

[0063] In some embodiments of the present application, as shown in FIG. 2 and FIG. 6, the filling structure body 41 is an annular structure coaxially arranged with the first bearing part 20 and the second bearing part 30, the filling structure body 41 is arc-shaped, the filling structure body 41 is assembled in the assembly hole 114, and along the radial direction of the assembly hole 114, the filling structure body 41 is located on the side of the boss structure 115 away from the inner wall of the assembly hole 114, and a guide inclined surface 45 is formed on the inner surface of the filling structure body 41 away from the boss structure 115.

[0064] The filling structure body 41 is arc-shaped. After the filling structure body 41 is assembled in the assembly hole 114, along the radial direction of the assembly hole 114, the filling structure body 41 is located on the side of the boss structure 115 away from the inner wall of the assembly hole 114. The filling structure body 41 is opposite to the end of the boss structure 115 away from the inner wall of the assembly hole 114, that is, the filling structure body 41 is installed on the radial inner end of the boss structure 115, and opposite to the radial inner end of the boss structure 115, the filling structure body 41 can abut against the boss structure 115. The filling structure body 41 can define a second through hole 48, and the inner surface of the second through hole 48 is formed with a guide inclined surface 45 extending along the circumferential direction of the second through hole 48. The guide inclined surface 45 is provided at least one. When the guide inclined surface 45 is provided as one, along the arrangement direction of the first bearing 20 and the second bearing 30, the guide inclined surface 45 is adjacent to one end of the filling structure body 41. When the guide inclined surface 45 is provided as two, along the arrangement direction of the first bearing 20 and the second bearing 30, the two guide inclined surfaces 45 are respectively adjacent to two ends of the filling structure body 41. The application is described by taking the guide inclined surface 45 provided as two as an example. By providing the guide inclined surface 45, when the motor shaft 302 and the filling structure 40 are assembled, the guide inclined surface 45 can guide the motor shaft 302, facilitate the motor shaft 302 to pass through the filling structure 40, and improve the assembly efficiency of the motor shaft 302 and the filling structure 40.

[0065] In some embodiments of the application, as shown in FIGS. 2, 8 and 9, the first filling portion 42 is formed with a first avoiding opening 46 corresponding to the first oil injection opening 112, and the second filling portion 43 is formed with a second avoiding opening 47 corresponding to the second oil injection opening 113.

[0066] The first filling portion 42 can be arc-shaped, and the two ends of the first filling portion 42 are opposite and spaced apart to form the first avoiding opening 46 between the two ends of the first filling portion 42. When the filling structure 40 is assembled in the boss structure 115, along the arrangement direction of the first bearing 20 and the second bearing 30, the first avoiding opening 46 and the first oil injection opening 112 are correspondingly arranged. Alternatively, the first filling portion 42 can be a closed loop structure, and the first filling portion 42 forms a first avoiding opening 46 penetrating through the first filling portion 42 along the arrangement direction of the first bearing 20 and the second bearing 30.

[0067] The second filling part 43 can be arc-shaped, and two ends of the second filling part 43 are opposite and spaced apart to form a second avoiding opening 47 between the two ends of the second filling part 43. When the filling structure 40 is assembled to the boss structure 115, the second avoiding opening 47 and the second oil injection opening 113 are arranged correspondingly along the arrangement direction of the first bearing 20 and the second bearing 30. Alternatively, the second filling part 43 can be a closed loop structure, and the second filling part 43 forms a second avoiding opening 47 penetrating through the second filling part 43 along the arrangement direction of the first bearing 20 and the second bearing 30.

[0068] The first avoiding opening 46 is formed by the first filling part 42 to avoid the first filling part 42 from the first oil injection opening 112, so that the oil injected from the first oil injection opening 112 can be smoothly injected into the first bearing 20. The second avoiding opening 47 is formed by the second filling part 43 to avoid the second filling part 43 from the second oil injection opening 113, so that the oil injected from the second oil injection opening 113 can be smoothly injected into the second bearing 30.

[0069] In some embodiments of the present application, the first bearing 20 is used to support a main shaft 201 of the transmission 100, and the second bearing 30 is used to support a motor shaft 302. The radial dimension of the first bearing 20 is greater than the radial dimension of the second bearing 30. The main shaft 201 is formed with a central hole extending along the axial direction of the main shaft 201. The motor shaft 302 is inserted into the central hole of the main shaft 201 and is in transmission with the main shaft 201 through spline fitting.

[0070] The central hole can penetrate through the main shaft 201. The central hole can be provided with an inner spline. The motor shaft 302 is formed with an outer spline. The motor shaft 302 is inserted into the central hole of the main shaft 201. The inner spline in the central hole and the outer spline of the motor shaft 302 are in transmission. It should be noted that the main shaft 201 needs to transmit power to other transmission shafts of the transmission 100 through tooth engagement, and needs to have greater strength. The present application can expand the size of the first bearing 20 to improve the transmission stability of the main shaft 201, under the premise that the interval distance between the first central axis 1121 and the inner ring of the first bearing 20 is less than the interval distance between the first central axis 1121 and the outer ring of the first bearing 20, the interval distance between the second central axis 1131 and the inner ring of the second bearing 30 is greater than the interval distance between the second central axis 1131 and the outer ring of the second bearing 30, and the lubricating oil can be injected into the ball of the first bearing 20 and the ball of the second bearing 30.

[0071] The power assembly 300 according to the embodiments of the present application includes the transmission 100 of the above-mentioned embodiments. The transmission 100 is arranged in the power assembly 300 to prolong the service life of the transmission 100, thereby improving the use reliability of the power assembly 300.

[0072] As shown in FIG. 10, the vehicle 400 according to the embodiment of the application includes the power assembly 300 of the above-described embodiment, so that the use reliability of the vehicle 400 can be improved.

[0073] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] Although the embodiments of the application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and the scope of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A transmission, wherein, The box has a bearing mounting seat; The first bearing piece and the second bearing piece are respectively located on opposite sides of the bearing mounting seat, and the bearing mounting seat is formed with an oil injection flow channel having a first oil injection opening open toward the first bearing piece and a second oil injection opening open toward the second bearing piece, and a first center axis of the first oil injection opening and a second center axis of the second oil injection opening both extend along the arrangement direction of the first bearing piece and the second bearing piece, the first center axis is located between the inner ring and the outer ring of the first bearing piece, the second center axis is located between the inner ring and the outer ring of the second bearing piece, and the interval distance between the first center axis and the inner ring of the first bearing piece is smaller than the interval distance between the first center axis and the outer ring of the first bearing piece, and the interval distance between the second center axis and the inner ring of the second bearing piece is greater than the interval distance between the second center axis and the outer ring of the second bearing piece. The oil injection flow channel penetrates through the bearing mounting seat along the arrangement direction of the first bearing piece and the second bearing piece, so that both ends of the oil injection flow channel are open and are respectively configured as the first oil injection opening and the second oil injection opening.

2. The transmission of claim 1, wherein, The oil injection flow channel is configured as a straight channel.

3. The transmission of claim 1 or 2, wherein, The oil injection flow channel is multiple.

4. The transmission of any of claims 1-3, wherein, Multiple oil injection flow channels are arranged along the circumference of the bearing mounting seat.

5. The transmission of claim 4, wherein, The box is also formed with an oil inlet flow channel in communication with the oil injection flow channel.

6. The transmission of any of claims 1-5, wherein, The bearing mounting seat is formed with an assembly hole penetrating through the bearing mounting seat along the arrangement direction of the first bearing piece and the second bearing piece, an inner wall of the assembly hole is formed with a boss structure between the first bearing piece and the second bearing piece, and the boss structure forms the oil injection flow channel.

7. The transmission of any of claims 1-6, wherein, The boss structure is annular and arranged along the circumference of the assembly hole.

8. The transmission of claim 7, wherein, Further comprising: a filling structure, at least one of between the first bearing piece and the boss structure and between the second bearing piece and the boss structure is provided with the filling structure, the filling structure between the first bearing piece and the boss structure avoids the first oil injection opening, and the filling structure between the second bearing piece and the boss structure avoids the second oil injection opening.

9. The transmission of claim 7 or 8, wherein, The filling structure is one, and the filling structure has a first part and a second part, the first part is located between the first bearing piece and the boss structure, and the second part is located between the second bearing piece and the boss structure.

10. The transmission of claim 9, wherein, The filling structure includes a filling structure body, a first filling part and a second filling part, the first filling part and the second filling part are opposite and spaced apart, the filling structure body is fixedly connected with the first filling part and the second filling part, the first filling part is located between the first bearing piece and the boss structure, and the second filling part is located between the second bearing piece and the boss structure.

11. The transmission of claim 9 or 10, wherein, ​ 12. The transmission of claim 11, wherein, The first filling part and the second filling part are annular structures coaxially arranged with the first bearing part and the second bearing part, the first filling part and the second filling part are both plate structures, the filling structure body is connected between the inner edge of the first filling part and the inner edge of the second filling part, and an included angle is formed between the filling structure body and the first filling part and between the filling structure body and the second filling part, so that the filling structure body, the first filling part and the second filling part jointly define a mounting groove, and at least part of the boss structure is assembled in the mounting groove.

13. The transmission of claim 11 or 12, wherein, The filling structure body is an annular structure coaxially arranged with the first bearing part and the second bearing part, the filling structure body is assembled in the assembly hole, and along the radial direction of the assembly hole, the filling structure body is located on the side of the boss structure away from the inner wall of the assembly hole, and a guide inclined surface is formed on the inner surface of the filling structure body away from the boss structure, and along the axial direction of the assembly hole, the guide inclined surface is adjacent to the end of the filling structure body.

14. The transmission of any of claims 11-13, wherein, The first filling part is formed with a first avoiding port corresponding to the first oil injection port, and the second filling part is formed with a second avoiding port corresponding to the second oil injection port.

15. The transmission of any of claims 1-14, wherein, The first bearing part is used for supporting a main shaft of the transmission, and the second bearing part is used for supporting a motor shaft, the radial dimension of the first bearing part is greater than the radial dimension of the second bearing part, the main shaft is formed with a central hole extending along the axial direction of the main shaft, and the motor shaft is inserted into the central hole of the main shaft and is in transmission through spline fitting with the main shaft.

16. A powertrain, wherein, The transmission comprises any one of the transmission according to claims 1-15.

17. A vehicle, wherein, The power assembly comprises the transmission according to claim 16.

Images