Transmission lubrication system

Abstract

This application relates to a transmission lubrication system, which includes an oil collection pan and an oil pipe group. The oil collection pan has multiple internal oil passages, each including an oil inlet and multiple oil pipe interfaces. Lubricating oil from the transmission enters the internal oil passages through the oil inlet. The oil pipe group is integrated and connected to the internal oil passages. The oil pipe group includes multiple external oil pipes, one end of which is connected to an oil pipe interface, and the other end of which is located at the internal component mounting location of the transmission. The oil pipe group is integrated and connected to the internal oil passages through the oil pipe interfaces, allowing the lubricating oil to enter the internal oil passages through the oil inlet and then be transported axially along the internal oil passages to different oil pipe interfaces. The lubricating oil is then transported to the external oil pipes through the oil pipe interfaces, with the external oil pipe ports located at the internal component mounting locations of the transmission. This achieves point-to-point and precise lubrication of structural dead zones and components such as gears and bearings within the transmission.

Description

Technical Field

[0001] This application relates to the field of mechanical lubrication technology, and in particular to transmission lubrication systems. Background Technology

[0002] In existing transmission lubrication systems, passive oil churning is typically used to lubricate the components inside the transmission. Some light-duty transmissions and transmissions with simple transmission processes can use local active lubrication to enhance the lubrication effect. However, for heavy-duty transmissions with complex transmission systems and a large number of shafts, which contain many gears and bearings, there are many dead angles in the internal structure and the lubrication requirements of important components such as gears and bearings are high. Using passive oil churning is difficult to achieve a good lubrication effect on gears and bearings in the dead angles of the structure. Summary of the Invention

[0003] Therefore, it is necessary to provide a transmission lubrication system to address the problem of poor lubrication of transmission components within the transmission.

[0004] A transmission lubrication system, the transmission lubrication system comprising:

[0005] An oil collection tray is provided with multiple internal oil passages, each including an oil inlet and multiple oil pipe interfaces. The lubricating oil in the transmission enters the internal oil passages through the oil inlet.

[0006] The oil pipe group is integrated and connected to the internal oil circuit. The oil pipe group includes multiple external oil pipes, one end of which is connected to the oil pipe interface, and the other end of which is located at the internal parts mounting location of the transmission.

[0007] In one embodiment, the internal oil passage includes a plurality of oil holes disposed on the oil collection plate, and the plurality of oil holes are interconnected.

[0008] In one embodiment, the oil collection plate has a shaft hole for the transmission drive shaft to pass through, and the internal oil passage includes an oil hole that passes through the shaft hole radially.

[0009] In one embodiment, the transmission lubrication system further includes a transmission front housing, the oil collection tray being connected to the transmission front housing, the transmission front housing including a low-pressure oil port and a high-pressure oil port; the low-pressure oil port is connected to the internal space of the transmission containing lubricating oil, the low-pressure oil port being used to connect to the oil pump suction port of the transmission lubrication system, the high-pressure oil port being connected to the oil inlet port, and the high-pressure oil port being used to connect to the oil pump discharge port of the transmission lubrication system.

[0010] In one embodiment, the front housing of the transmission has a first inner oil passage on the side opposite to the oil collection tray, and the oil collection tray has a second inner oil passage on the side opposite to the front housing of the transmission. The inner oil passage includes an oil passage formed by the first inner oil passage and the second inner oil passage, and the oil inlet is located in the first inner oil passage.

[0011] In one embodiment, the transmission lubrication system further includes a fine filter disposed on an oil line connecting the high-pressure oil port and the oil inlet.

[0012] In one embodiment, the transmission front housing includes a fine filter port connected to the oil inlet and the high-pressure oil port, and the fine filter is placed inside the fine filter port to be integrated into the transmission front housing.

[0013] In one embodiment, the transmission lubrication system further includes a coarse filter disposed on an oil line connecting the low-pressure oil port and the oil suction port.

[0014] In one embodiment, the transmission front housing includes a coarse filter port connected to the low-pressure oil port and the oil suction port, and the coarse filter is placed inside the coarse filter port to be integrated into the transmission front housing.

[0015] In one embodiment, the transmission lubrication system further includes a transmission housing and a lubricating oil pump. The transmission housing is disposed on the side of the transmission front housing opposite to the oil collection pan. The lubricating oil pump is connected to the transmission housing and is disposed on the side of the transmission housing opposite to the transmission front housing. The lubricating oil pump includes the oil suction port and the oil discharge port.

[0016] In the technical solution of this application, the oil collection pan is provided with multiple internal oil passages, each including an oil inlet and multiple oil pipe interfaces. The oil pipe group is integrated and connected to the internal oil passages through the oil pipe interfaces, so that after the lubricating oil enters the internal oil passage through the oil inlet, it is transported directly to different oil pipe interfaces along the axial direction of the internal oil passages. It is then transported to the external oil pipes through the oil pipe interfaces. The external oil pipe ports are located at the internal parts mounting locations of the transmission, thereby achieving point-to-point lubrication and precise lubrication of the structural dead corners inside the transmission and components such as gears and bearings. Attached Figure Description

[0017] Figure 1 This is a front view exploded structural diagram of the transmission lubrication system of this application.

[0018] Figure 2 This is a rear view exploded structural diagram of the transmission lubrication system of this application.

[0019] Figure 3 These are schematic diagrams of the front, side, and rear views of the transmission front housing of the transmission lubrication system of this application.

[0020] Figure 4 These are front and rear view structural diagrams of the oil collection tray of the transmission lubrication system of this application.

[0021] Figure 5 This is a schematic diagram of the structure of the low-pressure oil port connecting to the coarse filter interface of the transmission lubrication system of this application.

[0022] Figure 6 This is a schematic diagram of the structure of the transmission lubrication system of this application, showing the connection between the high-pressure oil port, the fine filter interface, and the oil inlet.

[0023] Figure 7 This is a schematic diagram showing the flow of lubricating oil from the low-pressure port to the coarse filter in the transmission lubrication system of this application.

[0024] Figure 8 This is a schematic diagram showing the flow of lubricating oil from the high-pressure port to the fine filter in the transmission lubrication system of this application.

[0025] Figure 9 This is a schematic diagram showing the flow of lubricating oil from the fine filter to the oil inlet in the transmission lubrication system of this application.

[0026] Figure 10 This is a schematic diagram showing the flow of lubricating oil from the inlet to the oil collection pan and external oil pipe in the transmission lubrication system of this application.

[0027] Explanation of component labels in the attached diagram:

[0028] 1000. Transmission lubrication system; 100. Oil collection tray; 200. Oil pipe group; 300. Internal oil passage; 400. Transmission front housing; 500. Fine filter; 600. Coarse filter; 700. Lubricating oil pump; 800. Transmission middle housing; 900. Transmission rear housing; 110. Second internal oil passage; 120. Shaft hole; 130. Oil pipe interface; 210. External oil pipe; 310. First oil hole; 320. Second oil hole; 330. Third oil hole; 340. Fourth oil hole; 350. Fifth oil hole; 360. Sixth oil hole; 410. First internal oil passage; 420. Low-pressure oil port; 430. High-pressure oil port ; 440, Fine filter interface; 450, Coarse filter interface; 460, Oil inlet; 470, Oil collection tray interface; 710, Oil suction port; 720, Oil discharge port; 131, First oil pipe interface; 132, Second oil pipe interface; 133, Third oil pipe interface; 134, Fourth oil pipe interface; 135, Fifth oil pipe interface; 136, Sixth oil pipe interface; 211, First oil pipe; 212, Second oil pipe; 213, Third oil pipe; 214, Fourth oil pipe; 215, Fifth oil pipe; 216, Sixth oil pipe; 411, First oil passage; 412, Second oil passage; 111, Third oil passage; 112, Fourth oil passage. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] See Figures 1 to 4 , Figure 1 and Figure 2 The front and rear views of the exploded structure of the transmission lubrication system 1000 of this application are shown respectively. Figure 3 The diagram shows front, side and rear views of the transmission front housing 400 of the transmission lubrication system 1000. Figure 4The diagram shows front and rear views of the oil collection tray 100 of the transmission lubrication system 1000 of this application. This application proposes a transmission lubrication system 1000, which includes an oil collection tray 100 and an oil pipe group 200. The oil collection tray 100 is provided with multiple internal oil passages 300, each including an oil inlet 460 and multiple oil pipe interfaces 130. Lubricating oil from the transmission enters the internal oil passages 300 through the oil inlet 460. The multiple internal oil passages 300 are interconnected, and the multiple oil pipe interfaces 130 are distributed on the multiple internal oil passages 300.

[0036] The oil pipe group 200 is integrated and connected to the internal oil passage 300. The oil pipe group 200 includes multiple external oil pipes 210, one end of which is connected to an oil pipe interface 130, and the other end of which is located at the internal parts mounting location of the transmission. The oil collection tray 100 is provided with multiple internal oil passages 300, each including an oil inlet 460 and multiple oil pipe interfaces 130. The oil pipe group 200 is integrated and connected to the internal oil passage 300 through the oil pipe interfaces 130, so that after the lubricating oil enters the internal oil passage 300 through the oil inlet 460, the lubricating oil is directly transported to different oil pipe interfaces 130 through the multiple internal oil passages 300, and then transported to the external oil pipes 210 through the oil pipe interfaces 130. The ports of the external oil pipes 210 are located at the internal parts mounting location of the transmission, thereby achieving point-to-point and precise lubrication of the structural dead corners and components such as gears and bearings inside the transmission.

[0037] See Figure 1 and Figure 3The transmission lubrication system 1000 also includes a transmission front housing 400. An oil collection tray 100 is connected to the transmission front housing 400, which includes a low-pressure oil port 420 and a high-pressure oil port 430. The transmission lubrication system 1000 also includes a transmission middle housing 800 and a lubricating oil pump 700. The transmission middle housing 800 is located on the side of the transmission front housing 400 opposite to the oil collection tray 100. The lubricating oil pump 700 is connected to the transmission middle housing 800 and is located on the side of the transmission middle housing 800 opposite to the transmission front housing 400. The lubricating oil pump 700 includes an oil suction port 710 and an oil discharge port 720. The lubricating oil pump 700 is located at the transmission oil pan, where there is ample installation space, reducing the installation difficulty when the lubricating oil pump 700 is internally mounted. This arrangement improves the utilization of the internal space of the transmission and reduces the overall size of the transmission. The low-pressure port 420 is connected to the internal space of the transmission containing lubricating oil. The low-pressure port 420 is used to connect to the oil pump suction port 710 of the transmission lubrication system 1000. The high-pressure port 430 is connected to the oil inlet 460 and is used to connect to the oil pump discharge port 720 of the transmission lubrication system 1000. Lubricating oil enters the oil pump 700's suction port 710 through the low-pressure port 420 and is then discharged from the oil pump 700's discharge port 720, entering the high-pressure port 430.

[0038] The transmission lubrication system 1000 also includes a transmission rear housing 900, a manifold 100, a transmission front housing 400, a transmission middle housing 800, and a transmission rear housing 900 connected in sequence.

[0039] The front housing 400 of the transmission also includes an oil collection tray interface 470, through which the oil collection tray 100 is connected and installed on the front housing 400 of the transmission. The lubricating oil entering from the high-pressure oil port 430 in the front housing 400 enters the inner oil passage 300, which is formed by the first inner oil passage 410 and the second inner oil passage 110, through the oil inlet 460, and is then distributed to multiple oil pipe interfaces 130 on the inner oil passage 300, and finally enters multiple outer oil pipes 210.

[0040] See Figure 3The internal oil passage 300 includes multiple oil holes radially disposed on the oil collection plate 100, and these oil holes are interconnected. The oil collection plate 100 has a shaft hole 120 for the transmission drive shaft to pass through. The internal oil passage 300 includes oil holes radially passing through the shaft hole 120. These oil holes can be located at or outside the center of the shaft hole 120, depending on the lubrication location within the shaft system; no specific limitation is made here. Lubricating oil entering the internal oil passage 300 radially enters the shaft system along the shaft hole 120, lubricating the interior of the shaft system. The transmission front housing 400 has a first inner oil passage 410 on the side opposite to the oil collection tray 100, and a second inner oil passage 110 on the side opposite to the transmission front housing 400. The first inner oil passage 410 and the second inner oil passage 110 together form an inner oil passage 300, and an oil inlet 460 is provided in the first inner oil passage 410. An oil hole is connected to the oil passage formed by the first inner oil passage 410 and the second inner oil passage 110, and an oil pipe interface 130 is provided on the first inner oil passage 410, the second inner oil passage 110, and the oil hole.

[0041] See Figure 1 and Figure 2 The oil pipe interface 130 is located in the first inner oil passage 410 to connect to the outer oil pipe 210 located on the side of the transmission front housing 400 opposite to the oil collection tray 100; and / or the oil pipe interface 130 is located in the second inner oil passage 110 to connect to the outer oil pipe 210 located on the side of the oil collection tray 100 opposite to the transmission front housing 400. This arrangement ensures that gears, bearings, and other components requiring lubrication on both sides of the transmission front housing 400 can be lubricated through the outer oil pipe 210.

[0042] It should be noted that the location and number of oil holes, oil passages, oil pipe interfaces 130 and external oil pipes 210 are determined according to the installation and fixing location and number of gears, bearings and other components inside the transmission that need to be lubricated, and are not specifically limited here.

[0043] For example, the internal oil passage 300 includes a first oil hole 310, a second oil hole 320, a third oil hole 330, a fourth oil hole 340, a fifth oil hole 350 and a sixth oil hole 360, as well as a third oil passage 111 and a fourth oil passage 112 disposed on the oil collection plate 100, and a first oil passage 411 and a second oil passage 412 disposed on the front housing 400 of the transmission, wherein the third oil passage 111 and the first oil passage 411 together form an oil passage, and the fourth oil passage 112 and the second oil passage 412 together form an oil passage. The oil pipe interface 130 includes a first oil pipe interface 131, a second oil pipe interface 132, a third oil pipe interface 133, a fourth oil pipe interface 134, a fifth oil pipe interface 135, and a sixth oil pipe interface 136. The external oil pipes 210 include a first oil pipe 211, a second oil pipe 212, a third oil pipe 213, a fourth oil pipe 214, a fifth oil pipe 215, and a sixth oil pipe 216. The ends of each external oil pipe 210 are located near gears, bearings, and other parts inside the transmission that require lubrication. The oil holes of the internal oil passage 300 are interconnected. The oil pipe interfaces 130 are located on the internal oil passage 300, and the external oil pipes 210 are connected to the oil pipe interfaces 130 one by one. The first oil passage 411 and the second oil passage 412 are provided on the oil collection tray interface 470 of the front housing 400 of the transmission. The first oil passage 411 is connected to both the oil inlet 460 and the first oil pipe interface 131, and the second oil passage 412 is connected to the second oil pipe interface 132.

[0044] The oil passage formed by the first oil passage 411 and the third oil passage 111 is connected to the first oil hole 310 and the second oil hole 320. The first oil pipe interface 131, the third oil pipe interface 133 and the fourth oil pipe interface 134 are located at the end of the first oil hole 310, and the first oil hole 310 is connected to the fourth oil hole 340. The fifth oil pipe interface 135 is located at the end of the second oil hole 320, and the second oil hole 320 is connected to the fifth oil hole 350 and the sixth oil hole 360. The sixth oil hole 360 ​​is connected to the third oil hole 330. The second oil pipe interface 132 is located at the end of the third oil hole 330. The oil passage formed by the second oil passage 412 and the third oil passage 111 is connected to the sixth oil hole 360. The sixth oil pipe interface 136 is located at the end of the fourth oil passage 112. The fourth oil hole 340, the fifth oil hole 350, and the sixth oil hole 360 ​​are all oil holes that are radially inserted into the shaft hole 120 of the oil collection plate 100. Among them, the fourth oil hole 340 and the fifth oil hole 350 pass through the center of the two shaft holes 120 respectively, while the sixth oil hole 360 ​​is an oil hole that does not pass through the center of the shaft hole 120.

[0045] See Figure 10 , Figure 10This diagram illustrates the flow of lubricating oil from the inlet 460 to the oil collection tray 100 and the outer oil pipe 210. The path of the lubricating oil within the oil collection tray 100 is as follows: the lubricating oil enters the oil passage formed by the first oil passage 411 and the third oil passage 111 from the inlet 460, and then flows into the first oil hole 310 and the second oil hole 320. The lubricating oil entering the first oil hole 310 enters the first oil pipe 211, the third oil pipe 213, and the fourth oil pipe 214 through the first oil pipe interface 131, the third oil pipe interface 133, and the fourth oil pipe interface 134, respectively. The lubricating oil in the first oil hole 310 enters the fourth oil hole 340 to lubricate the internal shaft system located at the shaft hole 120. The lubricating oil entering the second oil hole 320 enters the fifth oil pipe 215 through the fifth oil pipe interface 135. The lubricating oil in the second oil hole 320 enters the fifth oil hole 350 and the sixth oil hole 360 ​​to lubricate the internal shaft system. The lubricating oil in the sixth oil hole 360 ​​enters the third oil hole 330 and enters the second oil pipe 212 through the second oil pipe interface 132. The lubricating oil in the sixth oil hole 360 ​​enters the oil passage formed by the second oil passage 412 and the fourth oil passage 112 and enters the sixth oil pipe 216 through the sixth oil pipe interface 136, thereby achieving active lubrication of the internal shaft system, gears and bearings of the transmission.

[0046] Further, see Figure 5 and Figure 7 , Figure 5 This paper shows a schematic diagram of the structure of the low-pressure oil port 420 of the transmission lubrication system 1000 of this application, which connects to the coarse filter port 450. Figure 7 A schematic diagram shows lubricating oil flowing from the low-pressure port 420 to the coarse filter 600. The transmission lubrication system 1000 also includes a coarse filter 600, which is disposed in the oil passage connecting the low-pressure port 420 and the suction port 710. The transmission front housing 400 includes a coarse filter interface 450, which connects to the low-pressure port 420 and the suction port 710. The coarse filter 600 is placed within the coarse filter interface 450 to be integrated into the transmission front housing 400, reducing the internal space occupied by an externally mounted coarse filter 600. See also... Figure 6 , Figure 8 and Figure 9 , Figure 6 This diagram shows a structural schematic of the transmission lubrication system 1000 of this application, where the high-pressure oil port 430 connects to the fine filter port 440 and the oil inlet 460. Figure 8 A schematic diagram showing the flow of lubricating oil from high-pressure oil port 430 to fine filter 500 is shown. Figure 9A schematic diagram shows the flow of lubricating oil from the fine filter 500 to the oil inlet 460. The transmission lubrication system 1000 also includes the fine filter 500, which is disposed on an oil passage connecting the high-pressure oil port 430 and the oil inlet 460. The transmission front housing 400 includes a fine filter interface 440, which connects to the oil inlet 460 and the high-pressure oil port 430. The fine filter 500 is placed within the fine filter interface 440 to be integrated into the transmission front housing 400, reducing the internal space occupied by an externally mounted fine filter 500. See also... Figure 3 The oil outlet, fine filter port 440, coarse filter port 450, high-pressure oil port 430, and low-pressure oil port 420 on the front housing 400 of the transmission are all located at the bottom of the front housing 400. The lubricating oil entering from the low-pressure oil port 420 flows through the coarse filter 600 and then enters the suction port 710 of the lubricating oil pump 700. After entering the high-pressure oil port 430 from the discharge port 720 of the lubricating oil pump 700, the lubricating oil entering from the high-pressure oil port 430 flows through the fine filter 500 and then enters the inner oil passage 300 through the oil inlet 460. The lubricating oil before entering the inner oil passage 300 is filtered twice by the fine filter 500 and the coarse filter 600, which can effectively reduce the risk of lubricating oil blockage in the inner oil passage 300.

[0047] In the technical solution of this application, the oil collection pan 100 is provided with multiple internal oil passages 300. Each internal oil passage 300 includes an oil inlet 460 and multiple oil pipe interfaces 130. The oil pipe group 200 is integrated and connected to the internal oil passages 300 through the oil pipe interfaces 130. This allows the lubricating oil to enter the internal oil passages 300 through the oil inlet 460 and then be transported directly along the axial direction of the internal oil passages 300 to different oil pipe interfaces 130. The lubricating oil is then transported to the external oil pipe 210 through the oil pipe interfaces 130. The port of the external oil pipe 210 is located at the internal parts installation location of the transmission, thereby achieving point-to-point lubrication and precise lubrication of the structural dead corners inside the transmission and components such as gears and bearings.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A transmission lubrication system, the transmission lubrication system comprising: An oil collection tray is provided with multiple internal oil passages, each including an oil inlet and multiple oil pipe interfaces. The lubricating oil in the transmission enters the internal oil passages through the oil inlet. The oil pipe group is integrated and connected to the internal oil circuit. The oil pipe group includes multiple external oil pipes. One end of each external oil pipe is connected to the oil pipe interface, and the other end of each external oil pipe is located at the internal parts mounting location of the transmission. The transmission lubrication system further includes a transmission front housing, the oil collection tray is connected to the transmission front housing, the transmission front housing includes a low-pressure oil port and a high-pressure oil port; the low-pressure oil port is connected to the internal space of the transmission containing lubricating oil, the low-pressure oil port is used to connect to the oil pump suction port of the transmission lubrication system, the high-pressure oil port is connected to the oil inlet port, and the high-pressure oil port is used to connect to the oil pump discharge port of the transmission lubrication system. The front housing of the transmission has a first inner oil passage on the side opposite to the oil collection tray, and the oil collection tray has a second inner oil passage on the side opposite to the front housing of the transmission. The inner oil passage includes an oil passage formed by the first inner oil passage and the second inner oil passage, and the oil inlet is located in the first inner oil passage.

2. The transmission lubrication system according to claim 1, characterized in that, The internal oil passage includes multiple oil holes disposed on the oil collection plate, and the multiple oil holes are interconnected.

3. The transmission lubrication system according to claim 2, characterized in that, The oil collection plate has a shaft hole for the transmission drive shaft to pass through, and the internal oil passage includes an oil hole that passes through the shaft hole radially.

4. The transmission lubrication system according to claim 1, characterized in that, The transmission lubrication system also includes a fine filter, which is installed in the oil line connecting the high-pressure oil port and the oil inlet.

5. The transmission lubrication system according to claim 4, characterized in that, The front housing of the transmission includes a fine filter port, which is connected to the oil inlet and the high-pressure oil port. The fine filter is placed inside the fine filter port to be built into the front housing of the transmission.

6. The transmission lubrication system according to claim 1, characterized in that, The transmission lubrication system also includes a coarse filter, which is installed on the oil line connecting the low-pressure oil port and the oil suction port.

7. The transmission lubrication system according to claim 6, characterized in that, The front housing of the transmission includes a coarse filter port, which is connected to the low-pressure oil port and the oil suction port. The coarse filter is placed inside the coarse filter port to be integrated into the front housing of the transmission.

8. The transmission lubrication system according to claim 1, characterized in that, The transmission lubrication system further includes a transmission housing and a lubricating oil pump. The transmission housing is located on the side of the transmission front housing opposite to the oil collection pan. The lubricating oil pump is connected to the transmission housing and is located on the side of the transmission housing opposite to the transmission front housing. The lubricating oil pump includes an oil suction port and an oil discharge port.

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