Gearbox and vehicle

Abstract

The invention belongs to the technical field of vehicles, and discloses a gearbox and a vehicle, in the gearbox, part of lubricating oil can sequentially flow through an inlet end, a first outlet end and a first mounting cavity to lubricate a first bearing, and the other part of lubricating oil can sequentially flow through the inlet end, a second outlet end and a second mounting cavity to lubricate a second bearing. The lubricating oil source can be communicated with the first mounting cavity and the second mounting cavity only by arranging the three-way pipe outside the shell, the structure is simple, machining and mounting are easy, in addition, the gearbox is provided with the communicating flow channel, the communicating flow channel is communicated with the first mounting cavity and the inner lubricating flow channel of the first transmission shaft at the same time, and the lubricating effect is good. And therefore, the lubricating oil in the first mounting cavity is introduced into an internal lubricating flow channel of the first transmission shaft, so that the lubricating oil can further flow to other parts of a shaft system where the first transmission shaft is located through the internal lubricating flow channel of the first transmission shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a transmission and a vehicle. Background Art

[0002] In the case of existing electric drive boxes and other types of transmissions with a large number of shafts and their bearings, it is difficult for their lubricating oil circuits to meet the precise lubrication of components such as shafts and bearings, resulting in a reduction in the efficiency of the transmission system and possibly a reduction in the service life of components.

[0003] In response to this, the prior art provides a transmission lubrication system, which is provided with an external oil circuit for connecting to a lubricating oil source. The housing of the transmission is provided with an oil sump, and the oil sump has an internal oil circuit. The external oil circuit is connected to the internal oil circuit, so as to convey the lubricating oil to the structural dead corners inside the transmission and components such as gears and bearings, in order to achieve precise lubrication of each component inside the transmission. However, the problems it has are that the structures of the external oil circuit and the internal oil circuit are complex, and the processing and installation are difficult. In addition, due to the too high rotational speed of the input shaft system of some electric drive boxes, it is difficult to introduce the lubricating oil into the shaft system. Summary of the Invention

[0004] According to one aspect of the present invention, the present invention provides a transmission to solve the problems in the prior art that the structures of the external oil circuit and the internal oil circuit are complex, the processing and installation are difficult, and the rotational speed of the input shaft system of some electric drive boxes is too high, making it difficult to introduce the lubricating oil into the shaft system.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A transmission, including a housing, the housing having a first installation cavity for installing a first bearing and a second installation cavity for installing a second bearing, an inner ring of the first bearing being connected to a first transmission shaft, and an inner ring of the second bearing being connected to a second transmission shaft;

[0007] It further includes a three-way pipe, the three-way pipe having an inlet end, a first outlet end, and a second outlet end, the inlet end being used for the lubricating oil liquid to enter, the first outlet end being communicated with the first installation cavity, and the second outlet end being communicated with the second installation cavity;

[0008] The transmission has a communication flow channel, and the communication flow channel is simultaneously communicated with the first installation cavity and an internal lubrication flow channel of the first transmission shaft.

[0009] As a preferred solution of the transmission, the housing has a first flow channel, the first outlet end, the first flow channel, and the first installation cavity are sequentially communicated; the housing further has a second flow channel, and the second outlet end, the second flow channel, and the second installation cavity are sequentially communicated.

[0010] As a preferred solution of the transmission, it further includes a first baffle disposed in the first installation cavity. The first baffle divides the first installation cavity into a first lubrication cavity and a first bearing installation cavity. The first bearing is installed in the first bearing installation cavity. The first lubrication cavity is communicated with the first flow channel. The first baffle has a first through hole and a second through hole. The first lubrication cavity is communicated with the first bearing installation cavity through the first through hole. The first lubrication cavity is communicated with the internal lubrication flow channel of the first transmission shaft through the second through hole. The center line of the second through hole coincides with the axis of the first transmission shaft. The first through hole is disposed opposite to the ball of the first bearing.

[0011] As a preferred solution of the transmission, a central portion of the first baffle protrudes toward one side of the first transmission shaft and forms a protruding end. The protruding end extends into the internal lubrication flow channel of the first transmission shaft. The second through hole is disposed in the protruding end.

[0012] As a preferred solution of the transmission, the outer periphery of the first baffle has a flanging. One side of the flanging is in sealing cooperation with the housing, and the other side abuts against the first bearing.

[0013] As a preferred solution of the transmission, the first flow channel includes a first oil hole and a second oil hole. The first outlet end, the first oil hole, the second oil hole, and the first installation cavity are communicated in sequence. The center line of the first oil hole is parallel to the center line of the first bearing and is located outside the first bearing. The center line of the second oil hole forms an angle with the center line of the first bearing, and the angle is less than 90°.

[0014] As a preferred solution of the transmission, the first flow channel further includes a diversion groove. The diversion groove communicates the second oil hole with the first installation cavity at the same time.

[0015] As a preferred solution of the transmission, the second flow channel includes a third oil hole and a fourth oil hole. The second outlet end, the third oil hole, the fourth oil hole, and the second installation cavity are communicated in sequence. The center line of the third oil hole is parallel to the center line of the second bearing and is located outside the second bearing. The center line of the fourth oil hole is perpendicular to the center line of the second bearing.

[0016] As a preferred solution of the transmission, it further includes a second baffle disposed in the second installation cavity. The second baffle divides the second installation cavity into a second lubrication cavity and a second bearing installation cavity. The second bearing is installed in the second bearing installation cavity. The second lubrication cavity is communicated with the second flow channel. The second baffle has a third through hole. The second lubrication cavity is communicated with the second bearing installation cavity through the third through hole.

[0017] As a preferred solution of the transmission, the tee has an inner cavity, and the first outlet end and the second outlet end are located on the same side of the inner cavity.

[0018] As a preferred solution of the transmission, the first transmission shaft is a power input shaft, the first transmission shaft is fixedly connected with a first gear, the second transmission shaft is fixedly connected with a second gear, and the first gear meshes with the second gear.

[0019] According to another aspect of the present invention, a vehicle is provided, including the above transmission, wherein the first transmission shaft is connected to a vehicle power source, and the first transmission shaft is in transmission connection with the second transmission shaft.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention provides a transmission, including a housing. The housing has a first installation cavity for installing a first bearing and a second installation cavity for installing a second bearing. The inner ring of the first bearing is connected to the first transmission shaft, and the inner ring of the second bearing is connected to the second transmission shaft. The transmission further includes a tee, which has an inlet end, a first outlet end, and a second outlet end. The inlet end is used for lubricating oil to enter. The first outlet end communicates with the first installation cavity, and the second outlet end communicates with the second installation cavity. Thus, part of the lubricating oil can flow through the inlet end, the first outlet end, and the first installation cavity in sequence to lubricate the first bearing, and another part of the lubricating oil can flow through the inlet end, the second outlet end, and the second installation cavity in sequence to lubricate the second bearing. Only a tee needs to be arranged outside the housing to connect the lubricating oil source with the first installation cavity and the second installation cavity. The structure is simple, easy to process and install. The transmission has a communication flow channel, which is simultaneously connected to the first installation cavity and the internal lubrication flow channel of the first transmission shaft, so as to introduce the lubricating oil in the first installation cavity into the internal lubrication flow channel of the first transmission shaft, so that the lubricating oil can further flow to other parts of the shafting where it is located through the internal lubrication flow channel of the first transmission shaft.

[0022] The present invention also provides a vehicle, including the above-mentioned transmission. The first transmission shaft is connected to the vehicle power source, and the first transmission shaft is in transmission connection with the second transmission shaft. Inside the transmission, part of the lubricating oil can flow through the inlet end, the first outlet end, and the first installation cavity in sequence, so as to lubricate the first bearing. Another part of the lubricating oil can flow through the inlet end, the second outlet end, and the second installation cavity in sequence, so as to lubricate the second bearing. Only a tee pipe needs to be arranged outside the housing to connect the lubricating oil source with the first installation cavity and the second installation cavity. The structure is simple, and it is easy to process and install. In addition, the transmission has a communication flow channel, and the communication flow channel is simultaneously connected to the first installation cavity and the internal lubrication flow channel of the first transmission shaft, so as to introduce the lubricating oil in the first installation cavity into the internal lubrication flow channel of the first transmission shaft, so that the lubricating oil can further flow to other parts of the shaft system where it is located through the internal lubrication flow channel of the first transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of the transmission in an embodiment of the present invention;

[0024] Figure 2 is an exploded view of the transmission in an embodiment of the present invention;

[0025] Figure 3 is a first structural schematic diagram of the transmission in an embodiment of the present invention;

[0026] Figure 4 is Figure 3 a cross-sectional view of the A-A section in;

[0027] Figure 5 is a first partial cross-sectional view of the transmission in an embodiment of the present invention;

[0028] Figure 6 is a second structural schematic diagram of the transmission in an embodiment of the present invention;

[0029] Figure 7 is Figure 6 a cross-sectional view of the B-B section in;

[0030] Figure 8 is a structural schematic diagram of the first retaining piece in an embodiment of the present invention;

[0031] Figure 9 is a cross-sectional view of the first retaining piece in an embodiment of the present invention;

[0032] Figure 10 is a second partial cross-sectional view of the transmission in an embodiment of the present invention;

[0033] Figure 11 is a third structural schematic diagram of the transmission in an embodiment of the present invention;

[0034] Figure 12 isFigure 11 Cross-sectional view of the C-C section;

[0035] Figure 13 It is a cross-sectional view of the three-way pipe in the embodiment of the present invention.

[0036] In the figure:

[0037] 100, the first bearing;

[0038] 200, the second bearing;

[0039] 300, the first transmission shaft; 310, the first gear;

[0040] 400, the second transmission shaft; 410, the second gear;

[0041] 1, the housing; 101, the first installation cavity; 1011, the first lubrication cavity; 1012, the first bearing installation cavity; 102, the second installation cavity; 1021, the second lubrication cavity; 1022, the second bearing installation cavity; 110, the first flow channel; 111, the first oil hole; 112, the second oil hole; 113, the diversion groove; 120, the second flow channel; 121, the third oil hole; 122, the fourth oil hole; 123, the oil hole sealing plug;

[0042] 2, the three-way pipe; 201, the inlet end; 202, the first outlet end; 203, the second outlet end; 204, the inner cavity; 21, the pipe sealing plug;

[0043] 3, the first baffle; 301, the first through hole; 302, the second through hole; 31, the protruding end; 32, the flanging;

[0044] 4, the second baffle; 401, the third through hole. Detailed implementation manners

[0045] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0046] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may also include the case where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0048] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left" and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meanings.

[0049] In the case of existing electric drive boxes and other types of transmissions with a large number of shafts and their bearings, it is difficult for their lubricating oil circuits to meet the precise lubrication of components such as their shafts and bearings. In this regard, the prior art provides a transmission lubrication system, which is provided with an external oil circuit for connecting to a lubricating oil source. The housing of the transmission is provided with an oil sump, and the oil sump has an internal oil circuit. The external oil circuit is connected to the internal oil circuit, so as to transport the lubricating oil to the structural dead corners inside the transmission and components such as gears and bearings, in order to achieve the precise lubrication of each component inside the transmission. However, the problems thereof are that the structures of the external oil circuit and the internal oil circuit are complex, and the processing and installation are difficult. In addition, due to the excessively high rotational speed of the input shaft system of some electric drive boxes, it is difficult to introduce the lubricating oil into the shaft system.

[0050] In this regard, this embodiment provides a gearbox to solve the problems in the prior art that the structures of the external oil circuit and the internal oil circuit are complex, the processing and installation are difficult, and for some electric drive boxes, the rotational speed of the input shaft system is excessively high and it is difficult to introduce the lubricating oil into the shaft system. It can be used in the field of vehicle technologies. Among them, the gearbox can be a traditional gearbox or an electric drive box integrated with a transmission.

[0051] Refer to Figures 1 - 13, the transmission includes a housing 1. The housing 1 has a first installation cavity 101 for installing a first bearing 100 and a second installation cavity 102 for installing a second bearing 200. The inner ring of the first bearing 100 is connected to a first transmission shaft 300, and the inner ring of the second bearing 200 is connected to a second transmission shaft 400. The transmission further includes a three-way pipe 2. The three-way pipe 2 has an inlet end 21, a first outlet end 22, and a second outlet end 23. The inlet end 21 is for lubricating oil to enter. The first outlet end 22 communicates with the first installation cavity 101, and the second outlet end 13 communicates with the second installation cavity 102. Thus, part of the lubricating oil can flow through the inlet end 21, the first outlet end 22, and the first installation cavity 101 in sequence to lubricate the first bearing 100. Another part of the lubricating oil can flow through the inlet end 21, the second outlet end 23, and the second installation cavity 102 in sequence to lubricate the second bearing 200. Only by arranging the three-way pipe 2 outside the housing 1, the lubricating oil source can be connected to the first installation cavity 101 and the second installation cavity 102. The structure is simple and easy to process and install. The transmission has a communication flow channel, and the communication flow channel is simultaneously connected to the first installation cavity 101 and the internal lubrication flow channel of the first transmission shaft 300. Among them, the internal lubrication flow channel is connected to other structures of the shafting where the first transmission shaft 300 is located. Thus, the lubricating oil in the first installation cavity 101 is introduced into the internal lubrication flow channel of the first transmission shaft 300, so that the lubricating oil can further flow to other parts of the shafting where it is located through the internal lubrication flow channel of the first transmission shaft 300.

[0052] In this embodiment, the first transmission shaft 300 is a power input shaft. The first transmission shaft 300 is fixedly connected with a first gear 310, and the second transmission shaft 400 is fixedly connected with a second gear 410. The first gear 310 meshes with the second gear 410. In other embodiments, the second transmission shaft 400 can also be set as the power input shaft, and the first transmission shaft 300 is an intermediate transmission shaft. Or, both the first transmission shaft 300 and the second transmission shaft 400 are set as intermediate transmission shafts. Or, one of the first transmission shaft 300 and the second transmission shaft 400 is set as the power output shaft, and the other is set as the intermediate transmission shaft.

[0053] Continue to refer to Figures 1 - 13 , the housing 1 has a first flow channel 110. The first outlet end 202, the first flow channel 110, and the first installation cavity 101 are connected in sequence. Thus, it is connected to the first flow channel 110 inside through the three-way pipe 2 outside the housing 1, so that the lubricating oil enters the first installation cavity 101 via the first flow channel 110. The housing 1 also has a second flow channel 120. The second outlet end 203, the second flow channel 120, and the second installation cavity 102 are connected in sequence. Thus, it is connected to the second flow channel 120 inside through the three-way pipe 2 outside the housing 1, so that the lubricating oil enters the second installation cavity 102 via the second flow channel 120.

[0054] Continue to refer to Figures 1 - 13 The transmission further includes a first retaining plate 3 disposed in the first installation cavity 101. The first retaining plate 3 divides the first installation cavity 101 into a first lubrication cavity 1011 and a first bearing installation cavity 1012. The first bearing 100 is installed in the first bearing installation cavity 1012. The first lubrication cavity 1011 is communicated with the first flow channel 110. The first retaining plate 3 has a first through hole 301 and a second through hole 302. The first lubrication cavity 1011 is communicated with the first bearing installation cavity 1012 through the first through hole 301. The first lubrication cavity 1011 is communicated with the internal lubrication flow channel of the first transmission shaft 300 through the second through hole 302. The center line of the second through hole 302 coincides with the axis of the first transmission shaft 300. The first through hole 301 is disposed opposite to the balls of the first bearing 100, so that the lubricating oil can flow to the balls of the first bearing 100 through the first through hole 301.

[0055] Continue to refer to Figures 1 - 13 One side of the central part of the first retaining plate 3 protrudes toward the first transmission shaft 300 and forms a protruding end 31. The protruding end 31 extends into the internal lubrication flow channel of the first transmission shaft 300. The second through hole 302 is disposed on the protruding end 31, which is convenient for installing the first transmission shaft 300 on the protruding end 31, so that the first retaining plate 3 is stably connected to the first transmission shaft 300.

[0056] Continue to refer to Figures 1 - 13 The outer periphery of the first retaining plate 3 has a flange 32. One side of the flange 32 is in sealing fit with the housing 1, so that the first lubrication cavity 1011 is enclosed by the first retaining plate 3 and the housing 1 and forms a seal. Specifically, the flange 32 abuts against the housing 1, and the other side of the flange 32 abuts against the first bearing 100.

[0057] In this embodiment, the first transmission shaft 300 is a power input shaft. The space where the first installation cavity 101 is located is small, and the first retaining plate 3 needs to be installed. Therefore, the arrangement of the second oil hole 112 should be adapted to the small first installation cavity 101. Specifically, continue to refer to Figures 1 - 13 The first flow channel 110 includes a first oil hole 111 and a second oil hole 112. The first outlet end 202, the first oil hole 111, the second oil hole 112, and the first installation cavity 101 are communicated in sequence. The center line of the first oil hole 111 is parallel to the center line of the first bearing 100 and is located outside the first bearing 100. The center line of the second oil hole 112 forms an angle with the center line of the first bearing 100, and the angle is less than 90°. After the lubricating oil flows from the first oil hole 111 into the second oil hole 112, it flows obliquely backward in the second oil hole 112.

[0058] Optionally, the first flow channel 110 further includes a diversion groove 113 which simultaneously communicates with the second oil hole 112 and the first installation cavity 101, so as to play a certain role in guiding the flow through the diversion groove 113 and facilitate the lubricating oil to flow into the first installation cavity 101.

[0059] Continuing to refer to Figures 1 - 13 , the second flow channel 120 includes a third oil hole 121 and a fourth oil hole 122. The second outlet end 203, the third oil hole 121, the fourth oil hole 122 and the second installation cavity 102 are connected in sequence. The center line of the third oil hole 121 is parallel to the center line of the second bearing 200 and is located outside the second bearing 200, and the center line of the fourth oil hole 122 is perpendicular to the center line of the second bearing 200. The space where the second installation cavity 102 is located is relatively large, so the fourth oil hole 122 can be arranged perpendicular to the center line of the second bearing 200 to simplify the structure as much as possible. Optionally, an oil hole plug 123 is arranged on the side of the fourth oil hole 122 away from the second installation cavity 102 to block the side of the fourth oil hole 122 away from the second installation cavity 102.

[0060] Continuing to refer to Figures 1 - 13 , the transmission further includes a second retaining piece 4 arranged in the second installation cavity 102. The second retaining piece 4 divides the second installation cavity 102 into a second lubricating cavity 1021 and a second bearing installation cavity 1022. The second bearing 200 is installed in the second bearing installation cavity 1022. The second lubricating cavity 1021 communicates with the second flow channel 120. The second retaining piece 4 has a third through hole 401, and the second lubricating cavity 1021 communicates with the second bearing installation cavity 1022 through the third through hole 401. Optionally, the third through hole 401 is arranged opposite to the balls of the second bearing 200 so that the lubricating oil can flow to the balls of the second bearing 200 through the third through hole 401.

[0061] Continuing to refer to Figures 1 - 13 , the tee 2 has an inner cavity 204. The first outlet end 202 and the second outlet end 203 are located on the same side of the inner cavity 204. Since the first oil hole 111 and the third oil hole 121 are generally arranged on the same side of the transmission, such an arrangement facilitates the connection between the first outlet end 202 and the first oil hole 111, and the connection between the second outlet end 203 and the third oil hole 121. Optionally, the inlet end 201 is located on the side of the inner cavity 204 away from the first outlet end 202 and the second outlet end 203. In addition, one end of the inner cavity 204 is sealed by a pipe plug 21.

[0062] This embodiment also provides a vehicle, including the above transmission. The first transmission shaft 300 is connected to the vehicle power source, and the first transmission shaft 300 is in transmission connection with the second transmission shaft 400. Inside the transmission, part of the lubricating oil can flow through the inlet end 21, the first outlet end 22, and the first installation cavity 101 in sequence to lubricate the first bearing 100. Another part of the lubricating oil can flow through the inlet end 21, the second outlet end 23, and the second installation cavity 102 in sequence to lubricate the second bearing 200. Only a tee pipe 2 needs to be provided outside the housing 1 to connect the lubricating oil source with the first installation cavity 101 and the second installation cavity 102. The structure is simple and easy to process and install. In addition, the transmission has a communication flow channel that is simultaneously connected to the internal lubrication flow channel of the first installation cavity 101 and the first transmission shaft 300, so as to introduce the lubricating oil in the first installation cavity 101 into the internal lubrication flow channel of the first transmission shaft 300, enabling the lubricating oil to further flow to other parts of the shaft system where it is located through the internal lubrication flow channel of the first transmission shaft 300.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Transmission, including a housing (1), the housing (1) having a first mounting cavity (101) for mounting a first bearing (100) and a second mounting cavity (102) for mounting a second bearing (200), an inner ring of the first bearing (100) being connected to a first transmission shaft (300), and an inner ring of the second bearing (200) being connected to a second transmission shaft (400); It is characterized in that It further includes a three-way pipe (2), the three-way pipe (2) having an inlet end (201), a first outlet end (202) and a second outlet end (203), the inlet end (201) being for lubricating fluid to enter, the first outlet end (202) communicating with the first mounting cavity (101), and the second outlet end (203) communicating with the second mounting cavity (102); The transmission has a communicating flow passage that communicates with both the first mounting cavity (101) and an internal lubricating flow passage of the first transmission shaft (300).

2. The gearbox according to claim 1, characterized in that, The housing (1) has a first flow passage (110), and the first outlet end (202), the first flow passage (110) and the first mounting cavity (101) are sequentially communicated; the housing (1) further has a second flow passage (120), and the second outlet end (203), the second flow passage (120) and the second mounting cavity (102) are sequentially communicated.

3. The transmission according to claim 2, wherein It further includes a first baffle (3) disposed in the first mounting cavity (101), the first baffle (3) dividing the first mounting cavity (101) into a first lubricating cavity (1011) and a first bearing mounting cavity (1012), the first bearing (100) being mounted in the first bearing mounting cavity (1012), the first lubricating cavity (1011) communicating with the first flow passage (110), the first baffle (3) having a first through hole (301) and a second through hole (302), the first lubricating cavity (1011) communicating with the first bearing mounting cavity (1012) through the first through hole (301), the first lubricating cavity (1011) communicating with the internal lubricating flow passage of the first transmission shaft (300) through the second through hole (302), a center line of the second through hole (302) coinciding with an axis of the first transmission shaft (300), and the first through hole (301) being disposed opposite to balls of the first bearing (100).

4. The gearbox according to claim 3, characterized in that A central portion of the first baffle (3) protrudes toward one side of the first transmission shaft (300) and forms a protruding end (31), the protruding end (31) extending into the internal lubricating flow passage of the first transmission shaft (300), and the second through hole (302) being disposed in the protruding end (31).

5. The gearbox according to claim 3, characterized in that, The outer periphery of the first baffle (3) has a flanging (32), one side of the flanging (32) being in sealing fit with the housing (1), and the other side abutting against the first bearing (100).

6. The gearbox according to claim 2, wherein The first flow channel (110) includes a first oil hole (111) and a second oil hole (112). The first outlet end (202), the first oil hole (111), the second oil hole (112), and the first installation cavity (101) are communicated in sequence. The center line of the first oil hole (111) is parallel to the center line of the first bearing (100) and is located outside the first bearing (100). The center line of the second oil hole (112) forms an angle with the center line of the first bearing (100), and the angle is less than 90°.

7. The gearbox according to claim 6, characterized in that, The first flow channel (110) further includes a diversion groove (113). The diversion groove (113) communicates the second oil hole (112) and the first installation cavity (101) at the same time.

8. The transmission according to claim 2, wherein, The second flow channel (120) includes a third oil hole (121) and a fourth oil hole (122). The second outlet end (203), the third oil hole (121), the fourth oil hole (122), and the second installation cavity (102) are communicated in sequence. The center line of the third oil hole (121) is parallel to the center line of the second bearing (200) and is located outside the second bearing (200). The center line of the fourth oil hole (122) is perpendicular to the center line of the second bearing (200).

9. The gearbox according to claim 8, wherein, It further includes a second baffle (4) arranged in the second installation cavity (102). The second baffle (4) divides the second installation cavity (102) into a second lubrication cavity (1021) and a second bearing installation cavity (1022). The second bearing (200) is installed in the second bearing installation cavity (1022). The second lubrication cavity (1021) is communicated with the second flow channel (120). The second baffle (4) has a third through hole (401). The second lubrication cavity (1021) and the second bearing installation cavity (1022) are communicated through the third through hole (401).

10. The gearbox according to any one of claims 1-9, characterized in that, The tee pipe (2) has an inner cavity (204). The first outlet end (202) and the second outlet end (203) are located on the same side of the inner cavity (204).

11. The gearbox according to any one of claims 1-9, characterized in that, The first transmission shaft (300) is a power input shaft. The first transmission shaft (300) is fixedly connected with a first gear (310). The second transmission shaft (400) is fixedly connected with a second gear (410). The first gear (310) meshes with the second gear (410).

12. A vehicle, characterized in that, It includes a gearbox according to any one of claims 1-11. The first transmission shaft (300) is connected to a vehicle power source. The first transmission shaft (300) is in transmission connection with the second transmission shaft (400).

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