transmission assembly

Abstract

The utility model discloses a transmission assembly. According to the utility model discloses a transmission assembly including shell and first branch oil circuit, the shell is provided with the baffle in, the baffle is in the shell and is defined with first cavity and second cavity who set up mutually interval, be provided with motor assembly in the first cavity, be provided with variable speed gear set in the second cavity, at least part of first branch oil circuit extends in the second cavity, first branch oil circuit is suitable for spraying lubricating medium towards variable speed gear set, wherein, be provided with the branch oil channel of the inclination towards baffle on first branch oil circuit, form the communication oil channel of the second cavity towards the first cavity through on the baffle, the branch oil channel passes through communication oil channel and enters the first cavity, the utility model discloses a transmission assembly sets up the branch oil channel on the first branch oil circuit, can compensate motor assembly's lubrication, has improved the lubrication effect of transmission assembly.

Description

Technical Field

[0001] This utility model relates to the field of transmission systems, and in particular to a transmission component. Background Technology

[0002] Transmission components typically include a motor assembly and a gear set. While meeting lubrication and heat dissipation requirements, they must also minimize power loss to avoid reducing transmission efficiency due to significant power loss. Traditional transmission components often have complex structures and lubrication systems, which are difficult, costly, and time-consuming to develop and improve. In related technologies, transmission components typically lubricate the motor assembly and gear set separately through two independent oil channels. However, due to space constraints, bearings and other structures at the motor assembly ends often cannot be effectively lubricated, making them prone to damage. Utility Model Content

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a transmission assembly. According to this invention, the transmission assembly has a branch oil passage in the first branch oil circuit. This branch oil passage can guide a portion of the lubricating medium in the first branch oil circuit into the first cavity through a connecting oil passage on the partition to compensate for the lubrication of the motor assembly, further improving the lubrication effect of the transmission assembly.

[0004] The transmission assembly according to this utility model includes a housing and a first branch oil passage. A partition is provided inside the housing, defining a first cavity and a second cavity spaced apart from each other within the housing. A motor assembly is disposed in the first cavity, and a transmission gear set is disposed in the second cavity. At least a portion of the first branch oil passage extends into the second cavity, and the first branch oil passage is adapted to spray a lubricating medium toward the transmission gear set. The first branch oil passage has a branch oil channel inclined toward the partition, and a connecting oil channel is formed on the partition, extending from the second cavity toward the first cavity. The lubricating medium is adapted to enter the first cavity through the connecting oil channel.

[0005] The transmission assembly defines a first cavity and a second cavity within the housing via a partition. The first cavity houses a motor assembly and a gear train, respectively. The transmission assembly also includes a first branch oil passage, which directly delivers lubricating medium from the oil reservoir to the second cavity, thus lubricating both the motor assembly and the gear train. This eliminates the need for a separate oil reservoir structure, reducing the overall complexity and cost of the transmission assembly. The first branch oil passage has a branch oil channel inclined towards the partition. Simultaneously, the partition has a connecting oil channel linking the first and second cavities. This branch oil channel guides a portion of the lubricating medium from the first branch oil passage into the first cavity through the connecting oil channel, lubricating the motor assembly. This compensates for areas of the motor assembly not lubricated by the lubricating medium in the second branch oil passage, such as the end of the motor assembly near the partition, thereby improving the lubrication effect of the transmission assembly.

[0006] According to one embodiment of the present invention, the partition plate is provided with a plurality of interconnected ribs, the plurality of ribs surround each other and form an oil collecting cavity located in the second cavity; the bottom of the oil collecting cavity is formed with a communicating oil passage penetrating the partition plate, the top of the oil collecting cavity is open and the branch oil passage is open toward the oil collecting cavity.

[0007] According to one embodiment of the present invention, the transmission assembly further includes: a motor bearing, which is disposed in the first cavity and supports the motor shaft of the motor assembly, the motor bearing being disposed at one end of the motor assembly near the partition, and the connecting oil passage facing the motor bearing.

[0008] According to one embodiment of the present invention, the transmission assembly 1 further includes: a bottom shell, a main oil passage, and a second branch oil passage. The bottom shell is connected to the outer shell, and an oil storage chamber communicating with at least one of the first cavity and the second cavity is formed inside the bottom shell. The main oil passage is disposed on the partition, one end of the main oil passage extends to the oil storage chamber, and the other end of the main oil passage extends to the top of the outer shell and communicates with the second branch oil passage and the first branch oil passage, respectively. The second branch oil passage communicates with the other end of the main oil passage and extends toward the first cavity. The second branch oil passage is adapted to spray lubricating medium toward the motor assembly. The second branch oil passage and the first branch oil passage are arranged alternately on the main oil passage.

[0009] According to one embodiment of the present invention, the second branch oil circuit includes: a first oil spray pipe, a first oil spray ring, and a second oil spray ring. The first oil spray pipe extends along the axial direction of the motor assembly and communicates with the main oil circuit. The first oil spray ring is disposed on the inner wall of the first cavity and communicates with the first oil spray pipe. The second oil spray ring is disposed on the inner wall of the first cavity and communicates with the first oil spray pipe. The second oil spray ring and the first oil spray ring are arranged at intervals on both sides of the axial direction of the motor assembly. The first oil spray pipe, the first oil spray ring, and the second oil spray ring are respectively provided with oil injection holes that open toward the motor assembly.

[0010] According to one embodiment of the present invention, the inner diameter of the first oil spray pipe is φ1, the inner diameter of the first oil spray ring and the inner diameter of the second oil spray ring are both φ2, and the first oil spray pipe, the first oil spray ring and the second oil spray ring are respectively provided with a plurality of oil spray holes spaced apart from each other, and the inner diameter of the oil spray holes is φ3, and satisfies: 0.2≤φ3 / φ1≤0.3; 0.6≤φ2 / φ1≤0.7.

[0011] According to one embodiment of the present invention, the end of the first oil spray pipe away from the main oil circuit is provided with a first return oil circuit that communicates with the oil storage chamber.

[0012] According to one embodiment of the present invention, a recessed groove is formed on the bottom wall of the first cavity, the groove extends along the axial direction of the motor assembly and communicates with the oil storage cavity to form the first oil return path, and the cross-section of the groove in the axial direction of the motor assembly is an arc segment; a temporary storage cavity is formed in the first cavity, which communicates with the groove and is used to store the lubricating medium in the first cavity.

[0013] According to one embodiment of the present invention, a second oil spray pipe connected to the main oil circuit is provided on the first branch oil circuit. The second oil spray pipe extends along the axial direction of the motor assembly and away from the motor assembly. The second oil spray pipe is provided with a first spray zone, a second spray zone and a third spray zone spaced apart in sequence. Each spray zone is provided with a plurality of spray holes spaced apart from each other and facing the gear set. The diameter of the spray holes in the first spray zone is the same as the diameter of the spray holes in the second spray zone, and is smaller than the diameter of the spray holes in the third spray zone.

[0014] According to one embodiment of the present invention, at least one spray hole in the first spray zone, the second spray zone and the third spray zone is inclined toward one end of the transmission gear set in the radial direction.

[0015] According to one embodiment of the present invention, it further includes: a rear shell, the rear shell being disposed at the end of the second cavity away from the partition plate, the rear shell being provided with an upper section of a second oil return line and a lower section of a second oil return line, the upper section of the second oil return line and the lower section of the second oil return line being respectively connected to the oil cavity of the rotating shaft of the transmission gear set, and one end of the upper section of the second oil return line being connected to the first branch oil line.

[0016] According to one embodiment of the present invention, a throttling orifice is provided at the end of the first branch oil passage near the main oil passage, and a variable diameter section is provided at the end of the first branch oil passage away from the main oil passage. The variable diameter section is connected to the upper section of the second return oil passage, and the diameter of the variable diameter section gradually decreases in the direction away from the main oil passage.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a partial schematic diagram of a transmission assembly according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the main oil circuit and two branch oil circuits according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a transmission assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a partition, motor assembly, and speed-changing gear set according to an embodiment of the present invention.

[0019] Figure label: Transmission component 1; Motor assembly 101, motor bearing 1011, speed change gear set 102; Outer shell 11, first cavity 111, second cavity 112, partition 113, connecting oil passage 1131, rib 1132, oil collecting cavity 1133, rear shell 114, upper section of second return oil passage 1141, lower section of second return oil passage 1142; Bottom shell 12, oil storage chamber 121; Main oil line 13; Second branch oil passage 141, first oil spray pipe 1411, first oil spray ring 1412, second oil spray ring 1413, oil spray hole 1414; First branch oil passage 142, second oil spray pipe 1420, first spray area 1421, second spray area 1422, third spray area 1423, spray hole 1424, branch oil passage 1425; First oil inlet line 151, second oil inlet line 152; Mechanical pump 161, electronic pump 162, first pressure limiting valve 163, second pressure limiting valve 164; First oil circuit 17; Filter 191, filter press 192, oil cooler 193. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] Transmission components typically include a motor assembly and a gear set. While meeting lubrication and heat dissipation requirements, they must also minimize power loss to avoid reducing transmission efficiency due to significant power loss. Traditional transmission components often have complex structures and lubrication systems, which are difficult, costly, and time-consuming to develop and improve. In related technologies, transmission components typically lubricate the motor assembly and gear set separately through two independent oil channels. However, due to space constraints, bearings and other structures at the motor assembly ends often cannot be effectively lubricated, making them prone to damage.

[0022] The following is for reference. Figures 1-4 This invention describes a transmission assembly according to an embodiment of the present invention.

[0023] The transmission assembly 1 according to this utility model includes a housing 11 and a first branch oil passage 142. A partition 113 is provided inside the housing 11, defining a first cavity 111 and a second cavity 112 spaced apart from each other within the housing. A motor assembly 101 is provided in the first cavity 111, and a gear set 102 is provided in the second cavity 112. At least a portion of the first branch oil passage 142 extends within the second cavity 112, and the first branch oil passage 142 is adapted to spray a lubricating medium toward the gear set 102. A branch oil passage 1425 inclined toward the partition 113 is provided on the first branch oil passage 142, and a connecting oil passage 1131 is formed on the partition 113, which communicates with the second cavity 112 to the first cavity 111. The lubricating medium is adapted to enter the first cavity 111 through the connecting oil passage 1131.

[0024] The transmission assembly 1 according to this utility model has a housing 11, which defines a portion of the external outline of the transmission assembly 1. A partition 113 is provided inside the housing 11, defining a first cavity 111 and a second cavity 112 spaced apart from each other. The first cavity 111 houses a motor assembly 101, while the second cavity 112 houses a transmission gear set 102. By dividing the interior of the housing 11 into the first cavity 111 (for the motor assembly 101) and the second cavity 112 (for the transmission gear set 102), the transmission assembly 1 achieves a reasonable layout of the motor assembly 101 and the transmission gear set 102 within a limited space, improving the integration of the transmission assembly 1, making the overall structure more compact, and facilitating installation and use in space-constrained applications such as commercial vehicles.

[0025] The first branch oil circuit 142 can spray lubricate the transmission gear set 102, accurately providing the lubricating medium to ensure that the transmission gear set 102 is adequately lubricated and cooled during operation, reducing component wear and heat generation, extending service life, and improving the reliability and working efficiency of the transmission assembly 1.

[0026] The first branch oil passage 142 is also provided with a branch oil passage 1425 inclined towards the partition 113, and the partition 113 is provided with a connecting oil passage 1131 that passes through the partition 113 and connects the first cavity 111 and the second cavity 112. When the transmission assembly 1 is working, the lubricating medium in the first branch oil passage 142 can be split in the first branch oil passage 142. Part of the lubricating medium continues to flow in the first branch oil passage 142 and is used to lubricate the gear set 102; the other part of the lubricating medium flows along the branch oil passage 1425 and can enter the first cavity 111 from the second cavity 112 through the connecting oil passage 1131 to lubricate the structure on the motor assembly 101 near the partition 113, thereby realizing the lubrication compensation of the motor assembly 1 by the transmission assembly 1 to ensure that the motor assembly 101 can be fully lubricated and further improving the lubrication effect of the transmission assembly 1.

[0027] In some embodiments, at least a portion of the gear set 102 can extend into the oil reservoir 121, meaning the gear set 102 can directly contact the lubricating medium in the oil reservoir 121. Since the gear set 102 rotates continuously during operation, resulting in high friction and lubrication requirements, directly contacting at least a portion of the gear set 102 with the lubricating medium in the oil reservoir 121 allows the gear set 102 to agitate the oil itself, i.e., agitate the lubricating medium in the oil reservoir 121, causing the lubricating medium to splash directly onto the gear set 102 for lubrication. The agitation of the gear set 102 provides itself with a new lubrication path, thereby meeting the lubrication requirements.

[0028] According to one embodiment of the present invention, a plurality of interconnected ribs 1132 are provided on the partition 113, and the plurality of ribs 1132 surround each other to form an oil collecting cavity 1133 located in the second cavity 112; a connecting oil passage 1131 penetrating the partition 113 is formed at the bottom of the oil collecting cavity 1133, and the top of the oil collecting cavity 1133 is open and the branch oil passages 1425 open toward the oil collecting cavity 1133. Figure 4 As shown, multiple interconnected ribs 1132 are provided on the partition 113. The ribs 1132 improve the structural strength of the partition and enhance the overall reliability of the transmission assembly 1. The multiple ribs 1132 surround each other to form an oil collecting cavity 1133. The top of the oil collecting cavity 1133 is open and communicates with the branch oil passage 1425. The lubricating medium in the branch oil passage 1425 can enter the oil collecting cavity 1133. The oil collecting cavity 1133 can be simply understood as a space for temporarily storing or transferring lubricating medium. A connecting oil passage 1131 is provided in the oil collecting cavity 1133, which runs through the partition 113. The lubricating medium entering the oil collecting cavity 1133 can be sprayed onto the motor bearing 1011 under the guidance of the connecting oil passage 1131, so that the motor bearing 1011 is lubricated and the lubrication effect of the transmission assembly 1 is improved. Moreover, the ribs 1132 can form the oil collecting cavity 1133 without the partition 113 needing to be grooved, without reducing the structural strength of the partition 113.

[0029] According to one embodiment of the present invention, the transmission assembly 1 further includes: a motor bearing 1011, which is disposed in the first cavity 111 and supports the motor shaft of the motor assembly 101. The motor bearing 1011 is disposed at one end of the motor assembly 101 near the partition 113, and the oil passage 1131 is connected to the motor bearing 101. The motor bearing 1011 is disposed on the motor assembly 101 and is a structure that supports the rotation of the motor shaft. During assembly, the motor bearing 1011 is usually disposed near the partition 113 and can cooperate with the partition 113 to provide support for the motor shaft. The second branch oil passage 141 extends in the first cavity 111 and sprays lubricating medium towards the motor assembly 101. However, because the motor bearing 1011 is located near the partition 113, the lubricating medium in the second branch oil passage 141 cannot be directly sprayed onto the motor bearing 1011. The transmission assembly 1 has a branch oil passage 1425 on the first branch oil passage 142, and the branch oil passage 1425 is connected to the first cavity 111 through the connecting oil passage 1131 toward the motor bearing 1011. This allows a portion of the lubricating medium in the first branch oil passage 142 to flow out from the branch oil passage 1425 and be sprayed onto the motor bearing 1011 through the connecting oil passage 1131. This lubrication reduces the wear of the motor bearing 1011 and improves the overall lubrication effect and service life of the transmission assembly 1.

[0030] According to one embodiment of the present invention, the transmission assembly 1 further includes: a bottom shell 12, a main oil passage 13, and a second branch oil passage 141. The bottom shell 12 is connected to the outer shell 11, and an oil storage cavity 121 is formed inside the bottom shell 12, which communicates with at least one of the first cavity 111 and the second cavity 112. The main oil passage 13 is disposed on the partition 113, one end of the main oil passage 13 extends to the oil storage cavity 121, and the other end of the main oil passage 13 extends to the top of the outer shell 11 and communicates with the second branch oil passage 141 and the first branch oil passage 142 respectively. The second branch oil passage 141 communicates with the oil storage cavity 121 and extends toward the first cavity 111. The second branch oil passage 141 is adapted to spray lubricating medium toward the motor assembly 101. The second branch oil passage 141 and the first branch oil passage 142 are arranged alternately on the main oil passage 13.

[0031] A bottom shell 12 is provided at the bottom of the outer shell 11. The bottom shell 12 and the outer shell 11 define the outer contour of the transmission assembly 1. The bottom shell 12 is connected to the outer shell 11 and is located at the bottom of the outer shell 11. An oil storage chamber 121 is formed inside the bottom shell 12. The oil storage chamber 121 can store the lubricating medium (lubricating oil) for lubricating the transmission assembly 1. The oil storage chamber 121 can provide lubricating medium for the second branch oil passage 141 and the first branch oil passage 142, so as to deliver lubricating medium to the motor assembly 101 in the first cavity 111 and the gear set 102 in the second cavity 112, thereby realizing the lubrication of the motor assembly 101 and the gear set 102 by the transmission assembly 1.

[0032] The second branch oil passage 141 is connected to the oil storage chamber 121 and extends toward the first chamber 111. The second branch oil passage 141 is adapted to spray lubricating medium toward the motor assembly 101. The second branch oil passage 141 and the first branch oil passage 142 respectively spray lubrication onto the motor assembly 101 and the transmission gear set 102. It can accurately provide lubricating medium according to the lubrication and heat dissipation requirements of different components, ensuring that the motor assembly 101 and the transmission gear set 102 are adequately lubricated and cooled during operation, reducing component wear and heat generation, extending service life, and improving the reliability and working efficiency of the transmission assembly 1.

[0033] The transmission assembly 1 directly defines the oil storage chamber 121 through the cooperation of the bottom shell 12 and the outer shell 11. The lubricating medium in the oil storage chamber 121 can be directly transported to the first chamber 111 and the second chamber 112 through two branch oil circuits, so as to realize the lubrication of the motor assembly 101 and the gear set 102 by the transmission assembly 1. There is no need to design an independent oil storage space structure in the traditional transmission system, which reduces the complexity of the overall structure of the transmission assembly 1 and the cost. Moreover, the lubrication path is simple. The lubrication needs of different positions in the transmission assembly 1 can be met through only two branch oil circuits. There is no need for the design of multiple four-way valves in the oil circuit of the traditional lubrication system, which can further reduce the structural complexity of the transmission assembly 1. The control of the lubrication process is also simpler, which can reduce the difficulty of subsequent development and improvement of the transmission assembly 1.

[0034] The main oil passage 13 serves as the primary channel for lubricating medium delivery. It draws lubricating medium from the oil storage chamber 121 and delivers it to the top of the outer casing 11. Then, through the connected second branch oil passage 141 and first branch oil passage 142, it sprays lubricant onto the motor assembly 101 and the transmission gear set 102, respectively. This integrated design of the lubrication system reduces the complexity of the lubricating medium path and the number of pipelines, thereby lowering system costs and the risk of failure. Furthermore, the second branch oil passage 141 and the first branch oil passage 142 are staggered on the main oil passage 13, avoiding interference between them and resulting in a more compact overall layout of the transmission assembly 1.

[0035] In some embodiments, the transmission assembly 1 further includes: a first oil inlet passage 151 and a second oil inlet passage 152, the two ends of the first oil inlet passage 151 being connected to the oil storage chamber 121 and the main oil passage 13 respectively, and a mechanical pump 161 being provided on the first oil inlet passage 151; the two ends of the second oil inlet passage 152 being connected to the oil storage chamber 121 and the main oil passage 13 respectively, the second oil inlet passage 152 being spaced apart from the first oil inlet passage 151, and an electronic pump 162 being provided on the second oil inlet passage 152; wherein, at least one of the mechanical pump 161 and the electronic pump 162 can be selectively activated to draw lubricating medium from the oil storage chamber 121 and deliver it to the main oil passage 13.

[0036] like Figure 1As shown, the transmission assembly 1 is also provided with a first oil inlet 151 and a second oil inlet 152. These two oil inlets connect the oil storage chamber 121 to the main oil circuit 13. Specifically, a mechanical pump 161 is installed on the first oil inlet 151, which can draw lubricating medium from the oil storage chamber 121 and deliver it to the main oil circuit 13; an electronic pump 162 is installed on the second oil inlet 152, which can also draw lubricating medium from the oil storage chamber 121 and deliver it to the main oil circuit 13. By providing the first oil inlet 151 (equipped with the mechanical pump 161) and the second oil inlet 152 (equipped with the electronic pump 162), and with both oil inlets connected to the main oil circuit 13, the transmission assembly 1 achieves flexibility in the lubrication system's oil supply. For example, the mechanical pump 161 is controlled by the output shaft of the transmission assembly 1, and its speed is related to the vehicle speed; the oil supply is greater at higher vehicle speeds and less at lower vehicle speeds. The electronic pump 162 is controlled by the TCU and can be started independently according to actual needs. The design of two oil inlet lines allows the lubrication system to flexibly adjust the oil supply according to different operating conditions of the vehicle (such as starting, low-speed high-load climbing, high-speed high-load continuous operation, etc.), ensuring that the transmission gears and motor can be adequately lubricated and cooled under various operating conditions, and improving the adaptability of transmission component 1 to different operating conditions.

[0037] The coordinated operation of mechanical pump 161 and electronic pump 162 can precisely control the oil supply according to actual needs, avoiding unnecessary waste. For example, when the vehicle speed is high and the lubrication demand is large, mechanical pump 161 can provide the main oil supply power; while when the vehicle speed is low, the lubrication demand is small, or the oil supply capacity of mechanical pump 161 is insufficient, electronic pump 162 can supplement the oil supply in time. This on-demand oil supply method can effectively reduce the power consumption loss of the lubrication system, improve the transmission efficiency of the transmission components, and thus improve the fuel economy and power performance of the whole vehicle. Compared with the lubrication system design of traditional transmission systems (such as setting multiple four-way solenoid valves to control the lubrication branches separately), the transmission component 1 of this utility model achieves a reasonable layout and efficient operation of the lubrication system through the combination of two oil inlet lines and two pumps, simplifies the system structure, reduces the design and manufacturing difficulty, and also reduces the number of parts, which is conducive to reducing production and maintenance costs.

[0038] Furthermore, the transmission assembly 1 employs a selectable start-up method between at least one of the mechanical pump 161 and the electronic pump 162, which provides dual protection for the lubrication system. When one pump fails, the other pump can continue to operate, ensuring that the lubricating medium can be continuously delivered to the main oil circuit 13, thereby providing lubrication and cooling for the motor assembly 101 and the transmission gear set 102. This avoids problems such as increased wear, overheating, or even damage to components due to insufficient lubrication, improves the reliability and stability of the lubrication system, and ensures the normal operation of the transmission assembly 1.

[0039] In some embodiments, a first pressure relief valve 163 communicating with an oil storage chamber 121 is provided on the first oil inlet passage 151; a second pressure relief valve 164 communicating with an oil storage chamber 121 is provided on the second oil inlet passage 152. Figure 1 As shown, the transmission assembly 1 is equipped with a first pressure limiting valve 163 and a second pressure limiting valve 164 on the first oil inlet 151 and the second oil inlet 152, respectively. The first pressure limiting valve 163 and the second pressure limiting valve 164 are respectively connected to the oil storage chamber 121. When the pressure in the lubrication system exceeds the set value, the pressure limiting valve will automatically open. For example, when the flow rate of the lubricating medium output by the mechanical pump 161 or the electronic pump 162 is too large, causing the system pressure to rise, the corresponding pressure limiting valve will open, allowing the excess lubricating medium to flow back to the oil storage chamber 121. This prevents the excessive system pressure from damaging the various components of the transmission assembly 1 (such as the main oil circuit 13 and the two branch oil circuits), ensuring the safe and stable operation of the lubrication system. Moreover, it can also prevent the transmission gear set 102 from being unable to churn and lubricate due to insufficient lubricating medium in the oil storage chamber 121, ensuring the lubrication efficiency of the transmission gear set 102.

[0040] The two pressure relief valves maintain the pressure within the lubrication system of transmission assembly 1 within a relatively stable range. During vehicle operation, the oil supply demand of the lubrication system fluctuates due to changes in vehicle speed, load, and other factors, which may lead to significant changes in system pressure. The pressure relief valves effectively buffer pressure fluctuations by promptly adjusting the return flow of lubricating medium to the oil reservoir 121, ensuring that the lubrication system always operates under appropriate pressure, providing stable and reliable lubrication and cooling for the motor assembly 101 and the transmission gear set 102.

[0041] According to one embodiment of the present invention, the second branch oil passage 141 includes: a first oil spray pipe 1411, a first oil spray ring 1412, and a second oil spray ring 1413. The first oil spray pipe 1411 extends along the axial direction of the motor assembly 101 and communicates with the main oil passage 13. The first oil spray ring 1412 is disposed on the inner wall of the first cavity 111 and communicates with the first oil spray pipe 1411. The second oil spray ring 1413 is disposed on the inner wall of the first cavity 111 and communicates with the first oil spray pipe 1411. The second oil spray ring 1413 and the first oil spray ring 1412 are arranged at intervals on both sides of the axial direction of the motor assembly 101. The first oil spray pipe 1411, the first oil spray ring 1412, and the second oil spray ring 1413 are respectively provided with oil spray holes 1414 that open toward the motor assembly 101.

[0042] like Figure 2As shown, a first oil spray pipe 1411 is provided on the second branch oil passage 141. The first oil spray pipe 1411 is connected to the main oil passage 13. The first oil spray pipe 1411 is located at the top of the first cavity 111 and extends along the axial direction of the motor assembly 101. The first oil spray pipe 1411 is provided with an oil spray hole 1414 that opens towards the motor assembly 101. When some of the lubricating medium in the main oil passage 13 enters the first oil spray pipe 1411, a portion of the lubricating medium can be sprayed onto the motor assembly 101 through the oil spray hole 1414, thereby lubricating the motor assembly 101. The first oil-spraying pipe 1411 has a first oil-spraying ring 1412 and a second oil-spraying ring 1413 at both ends. The first oil-spraying ring 1412 and the second oil-spraying ring 1413 are connected to the first oil-spraying pipe 1411 and located on both sides of the axial direction of the motor assembly 101. When the lubricating medium flows through the first oil-spraying ring 1412 and the second oil-spraying ring 1413, it can be sprayed onto the motor assembly 101 from the oil spray holes 1414 on the first oil-spraying ring 1412 and the second oil-spraying ring 1413, respectively, to achieve lubrication of the motor assembly 101. The design of the first oil-spraying pipe 1411, the first oil-spraying ring 1412, and the second oil-spraying ring 1413 ensures that when the second branch oil circuit 141 sprays the lubricating medium, the lubricating medium can fully cover all parts of the motor assembly 101, ensuring that key structures such as motor bearings and motor stators can be fully and accurately lubricated, effectively reducing wear and heat generation problems caused by insufficient lubrication, and extending the service life of the motor assembly 101.

[0043] The first oil spray pipe 1411, the first oil spray ring 1412, and the second oil spray ring 1413 are respectively provided with oil spray holes 1414 that open towards the motor assembly 101. The lubricating medium can be sprayed onto the surface of the motor assembly 101 in a dispersed and uniform manner. Compared with a single spraying method, this multi-position and multi-angle spraying design can avoid uneven distribution of the lubricating medium on the surface of the motor assembly 101. When the lubricating medium is sprayed, it can cover the motor assembly 101 more comprehensively, thus improving the lubrication effect.

[0044] According to one embodiment of the present invention, the inner diameter of the first oil spray pipe 1411 is φ1, the inner diameter of the first oil spray ring 1412 and the inner diameter of the second oil spray ring 1413 are both φ2, and the first oil spray pipe 1411, the first oil spray ring 1412 and the second oil spray ring 1413 are respectively provided with a plurality of oil spray holes 1414 spaced apart from each other, and the inner diameter of the oil spray holes 1414 is φ3, and satisfies: 0.2≤φ3 / φ1≤0.3; 0.6≤φ2 / φ1≤0.7.

[0045] By defining the proportional relationship between the inner diameter φ1 of the first oil-drenching pipe 1411, the inner diameter φ2 of the first oil-drenching ring 1412, the inner diameter φ2 of the second oil-drenching ring 1413 (both have the same inner diameter), and the inner diameter φ3 of the oil spray hole 1414, a reasonable distribution of the lubricating medium can be achieved among the first oil-drenching pipe 1411, the first oil-drenching ring 1412, and the second oil-drenching ring 1413. This ensures that the lubricating medium entering the first oil-drenching pipe 1411 from the main oil passage 13 can be distributed to the first oil-drenching ring 1412 and the second oil-drenching ring 1413 at an appropriate flow rate and pressure, and then evenly sprayed onto the motor assembly 101 through the oil spray hole 1414. This avoids localized excess lubricating medium in the second branch oil passage 141, which would lead to waste, or localized insufficient lubricating medium, which would fail to meet the lubrication requirements of the motor assembly 101. The ratio range of 0.2 ≤ φ3 / φ1 ≤ 0.3 limits the relative size of the inner diameter of the oil injection hole 1414 and the inner diameter of the first oil spray pipe 1411, ensuring that the oil injection hole 1414 can generate appropriate spray pressure and spray range. If the inner diameter of the oil injection hole 1414 is too large, it may lead to insufficient spray pressure, and the lubricating medium cannot effectively cover the surface of the motor assembly 101; while if the inner diameter of the oil injection hole 1414 is too small, it may cause the spray to be too concentrated, failing to achieve uniform spraying. Similarly, the ratio range of 0.6 ≤ φ2 / φ1 ≤ 0.7 ensures the reasonable distribution of the lubricating medium within the first oil spray ring 1412, the second oil spray ring 1413, and the first oil spray pipe 1411, allowing the lubricating medium to flow smoothly within the oil spray rings and be evenly sprayed out through the oil injection hole 1414, optimizing the spraying effect and improving the lubrication quality.

[0046] In actual processing, the inner diameter φ1 of the first oil spray pipe 1411 can preferably be 6mm; the inner diameter φ2 of the first oil spray ring 1412 and the inner diameter φ2 of the second oil spray ring 1413 can preferably be 4mm; and the inner diameter φ3 of the oil spray hole 1414 can preferably be 1.6mm.

[0047] In some embodiments, the first oil-spraying ring 1412 is disposed on the side of the first oil-spraying pipe 1411 near the main oil passage 13, and the number of oil spray holes 1414 on the first oil-spraying ring 1412 is greater than the number of oil spray holes 1414 on the second oil-spraying ring 1413. The larger number of oil spray holes 1414 on the first oil-spraying ring 1412 allows for better pressure dispersion when the lubricating medium reaches it. While the larger number of spray holes 1414 disperses pressure to some extent, the initial pressure of the lubricating medium is higher due to the proximity of the first oil-spraying ring 1412 to the main oil passage 13. The greater number of spray holes 1414 allows for full utilization of this higher initial pressure, ensuring that the lubricating medium is evenly sprayed onto a larger area of ​​the motor assembly 101, thus guaranteeing sufficient and uniform lubrication in that area. Simultaneously, the larger number of spray holes 1414 also helps reduce the pressure at a single spray hole 1414, preventing excessive pressure from causing the lubricating medium to splash too far or impact the motor assembly 101, ensuring that the lubricating medium can gently and effectively cover the surface of the motor assembly 101. The second oil-drenching ring 1413 is far from the main oil circuit 13. During the flow of the lubricating medium through the first oil-drenching pipe 1411 and the first oil-drenching ring 1412, the pressure will decrease due to flow resistance and other factors. At this time, the number of oil spray holes 1414 on the second oil-drenching ring 1413 is relatively small. Under relatively low pressure, the small number of oil spray holes 1414 can ensure that each spray hole 1414 still has a certain spray pressure, enabling the lubricating medium to be sprayed onto the corresponding area of ​​the motor assembly 101. This avoids the situation where the lubricating medium cannot be effectively sprayed due to excessively low pressure, ensuring that areas far from the main oil circuit 13 can also receive basic lubrication and cooling.

[0048] According to one embodiment of the present invention, the end of the first oil spray pipe 1411 away from the main oil passage 13 is provided with a first return oil passage 17 communicating with the oil storage chamber 121. For example... Figure 1 As shown, the transmission assembly 1 has a first return oil passage 17 connected to the oil storage chamber 121 at the end of the first oil spray pipe 1411 away from the main oil passage 13. This allows the lubricating medium flowing out of the first oil spray pipe 1411 to return to the oil storage chamber 121 through the first return oil passage 17 after completing the lubrication of the motor assembly 101. This achieves the recycling of the lubricating medium, improves the utilization rate of the lubricating medium, reduces the waste of the lubricating medium, and can also maintain the liquid level of the lubricating medium in the oil storage chamber 121, preventing the lubricating medium in the oil storage chamber 121 from being too low and causing the transmission gear set 102 to be unable to stir the oil.

[0049] According to one embodiment of the present invention, the bottom wall of the first cavity 111 is formed with a recessed groove, the groove extends along the axial direction of the motor assembly 101 and communicates with the oil storage cavity 121 to form the first oil return path 17, and the cross-section of the groove in the axial direction of the motor assembly 101 is an arc-shaped segment; a temporary storage cavity is formed in the first cavity 111 that communicates with the groove and is used to store the lubricating medium in the first cavity 111.

[0050] The bottom wall of the first cavity 111 is provided with a recessed groove. The groove extends along the axial direction of the motor assembly 101 and communicates with the oil storage cavity 121 to form the first oil return path 17 in the above embodiment. The groove-shaped first oil return path 17 can guide the lubricating medium in the first cavity 111 to flow back smoothly and quickly to the oil storage cavity 121, thereby maintaining the circulation of the lubrication system. Moreover, compared with the hole structure of the traditional oil return method, the groove structure can allow more lubricating medium to pass through at the same time, improving the efficiency of the lubricating medium flowing back to the oil storage cavity 121. The groove in the axial direction of the motor assembly 101 is constructed as an arc segment. The arc design helps to reduce the flow resistance of the lubricating medium during the return process, making the lubricating medium flow more smoothly, avoiding oil stagnation or blockage, and further improving the efficiency of the lubrication system. At the same time, the arc-shaped groove can also match the shape of the outer shell 11. The motor assembly 101 is placed in the first cavity 111. Therefore, the transmission assembly 1 can design the part of the outer shell 11 at the position of the first cavity 111 to match the cylindrical shape of the motor assembly 101. At this time, the arc design of the groove can match the outer shell 11, making the processing more convenient and not affecting the structural shape of the outer shell 11 itself.

[0051] In some embodiments, the lateral distance of the groove can be 36.6 mm, the height can be 7 mm, and the area can be 330 mm². 2 .

[0052] The first cavity 111 also contains a temporary storage cavity communicating with the groove, used to store the lubricating medium within the first cavity 111. This design allows for the temporary storage of excess lubricating medium before it flows back to the oil reservoir 121, acting as a buffer to ensure that the lubrication system can continuously and stably provide lubrication to all components during the operation of the transmission assembly 1, avoiding wear or malfunctions caused by insufficient lubricating medium supply. The lubricating medium in the temporary storage cavity can be used to adjust the level of the lubricating medium in the oil reservoir 121 to compensate for the consumption of the transmission gear set 102.

[0053] According to one embodiment of the present invention, a second oil spray pipe 1420 communicating with the main oil circuit 13 is provided on the first branch oil circuit 142. The second oil spray pipe 1420 extends along the axial direction of the motor assembly 101 and away from the motor assembly 101. The second oil spray pipe 1420 is provided with a first spray zone 1421, a second spray zone 1422 and a third spray zone 1423 spaced apart in sequence. Each spray zone is provided with a plurality of spray holes 1424 spaced apart from each other and facing the gear set 102. The diameter of the spray holes 1424 in the first spray zone 1421 is the same as the diameter of the spray holes 1424 in the second spray zone 1422, and is smaller than the diameter of the spray holes 1424 in the third spray zone 1423.

[0054] like Figure 2 As shown, a second oil spray pipe 1420 is provided on the first branch oil circuit 142. The second oil spray pipe 1420 is connected to the main oil circuit 13 and intersects with the first oil spray pipe 1411. The second oil spray pipe 1420 is located at the top of the second cavity 112 and extends along the axial direction of the motor assembly 101. The extension direction is opposite to that of the first oil spray pipe 1411, thus avoiding mutual interference between the first oil spray pipe 1411 and the second oil spray pipe 1420. The second oil spray pipe 1420 is provided with a first spray zone 1421, a second spray zone 1422 and a third spray zone 1423 spaced apart in sequence. Each spray zone is provided with multiple spray holes 1424 facing the gear set 102. The axially extending second oil spray pipe 1420 enables the lubricating medium to be accurately sprayed to different areas of the gear set 102, with a wider coverage area. This avoids insufficient lubrication in some areas of the gear set 102 due to the inability of the lubricating medium to reach them, and ensures that the entire gear set 102 can be effectively lubricated and cooled.

[0055] The diameter of the spray holes 1424 in the first spray zone 1421 is the same as the diameter of the spray holes 1424 in the second spray zone 1422, and smaller than the diameter of the spray holes 1424 in the third spray zone 1423. The design of different diameters of the spray holes 1424 in different spray zones allows the second oil spray pipe 1420 to rationally distribute the flow rate of the lubricating medium according to the actual needs of different areas of the gear set 102. For example, the first spray zone 1421 and the second spray zone 1422 are close to the main oil circuit 13, with high pressure and flow rate. Therefore, the diameter of the spray holes 1424 in the first spray zone 1421 and the second spray zone 1422 is smaller, which can control the amount of lubricating medium sprayed in the first spray zone 1421 and the second spray zone 1422 and avoid waste of lubricating medium. On the other hand, the third spray zone 1423 is far from the main oil circuit 13, with low pressure and flow rate. At this time, the diameter of the spray holes 1424 in the second spray zone 1422 is larger, which can ensure that there is enough lubricating medium for lubrication on the gear set 102 corresponding to the third spray zone 1423, making the distribution of the spray medium in the first branch oil circuit 1422 more reasonable.

[0056] In a lubrication system, flow rate and pressure are interrelated. The design of spray orifices 1424 with different diameters helps to balance the flow rate and pressure within the system. When the lubricating medium enters the second spray pipe 1420 from the main oil passage 13, the smaller diameter of the spray orifices 1424 in the first spray zone 1421 and the second spray zone 1422 creates some resistance to the flow of the lubricating medium. This allows some of the lubricating medium to flow to the third spray zone 1423, preventing excessive concentration of the lubricating medium in a certain area and ensuring a reasonable distribution of flow rate throughout the lubrication system. It also maintains relatively stable system pressure, which is beneficial for the normal operation of the lubrication system. The differentiated flow supply allows the lubricating medium to more comprehensively cover different areas of the transmission gear set 102, improving lubrication efficiency.

[0057] In some embodiments, at least one spray hole 1424 in the first spray zone 1421, the second spray zone 1422, and the third spray zone 1423 is inclined toward one end of the gear set 102 in the radial direction. Inclining the spray hole 1424 of at least one spray zone toward one end of the gear set 102 in the radial direction allows the lubricating medium to be sprayed onto the gear set 102 at a specific angle. The inclined spray hole 1424 can change the spray direction of the lubricating medium, allowing it to reach key parts at the end of the gear set 102 more precisely, such as the end face and tooth tip of the gears, areas prone to wear. Furthermore, the inclined spray hole 1424 can also avoid obstruction by some gear tooth structures on the gear set 102, preventing the lubricating medium from being blocked by external structures and thus preventing it from entering the bearings, gear meshing positions, or other locations for lubrication, thereby improving the lubrication effect.

[0058] In some embodiments, 16 spray holes 1424 can be arranged at intervals along the extension direction of the second oil spray pipe 1420. The first spray hole 1424 (close to the main oil passage 13) can be arranged at an angle of 30°, the 12th and 13th spray holes 1424 can be arranged at an angle of 15°, and most of the other spray holes are arranged perpendicular to the oil passage. This inclined spray design can avoid the shaft tooth structure of the transmission gear set 102 from blocking the lubricating medium, increase the amount of lubricating medium entering the bearing and gear pair, and meet the lubrication requirements of the corresponding shaft teeth.

[0059] According to one embodiment of the present invention, the transmission assembly 1 further includes a rear shell 114, which is disposed at the end of the second cavity 112 away from the partition 113. The rear shell 114 contains an upper section 1141 of a second return oil path and a lower section 1142 of a second return oil path. The upper section 1141 and the lower section 1142 of the second return oil path are respectively connected to the oil chamber of the rotating shaft of the transmission gear set 102. One end of the upper section 1141 of the second return oil path is connected to a first branch oil path 142. As shown in the figure, the rear shell 114 is disposed at the end of the second cavity 112 away from the partition 113. The rear shell 114 is connected to the outer shell 11. The rear shell 114 can protect the transmission gear set 102 inside the second cavity 112 from external environmental interference and can prevent impurities and dust from entering the second cavity 112, thus improving the safety of the transmission gear set 102. The rear housing 114 is provided with a second upper section 1141 and a second lower section 1142 of the second oil return line. One end of the second upper section 1141 is connected to the first branch oil line 142, and the other end of the second upper section 1141 extends radially to the rotating shaft of the transmission gear set 102 and the bearing position. When the transmission assembly 1 is working, excess lubricating medium in the first branch oil line 142 can enter the second upper section 1141 and flow to the bearing position of the transmission gear set 102 under the guidance of the second upper section 1141, so as to lubricate the bearing of the rotating shaft of the transmission gear set 102. A portion of the lubricated oil can enter the oil cavity near the rotating shaft for temporary storage, and then enter the second lower section 1142 and flow along the second lower section 1142. The second lower section 1142 can guide this portion of lubricating medium to the bearing position of the intermediate shaft of the transmission gear set 102 to lubricate the bearing at that position. The upper section 1141 of the first return oil circuit and the lower section 1142 of the second return oil circuit work together to provide sufficient lubrication for the bearings of the transmission gear set 102, reduce the wear of the transmission gear set 102 caused by insufficient lubrication, improve the lubrication effect of the transmission gear set 102, and thus improve the overall performance of the transmission assembly 1.

[0060] According to one embodiment of this utility model, a throttling orifice is provided at the end of the first branch oil passage 142 near the main oil passage 13, and a variable diameter section is provided at the end of the first branch oil passage 142 away from the main oil passage 13. The variable diameter section is connected to the upper section 1141 of the second return oil passage, and the diameter of the variable diameter section gradually decreases in the direction away from the main oil passage 13. As shown in the figure, the variable diameter section at the end of the first branch oil passage 142 away from the main oil passage 13 allows for assembly with the upper section 1141 of the second return oil passage. The design of the gradually decreasing diameter of the variable diameter section in the direction away from the main oil passage 13 reduces the assembly difficulty of the first branch oil passage 142 and the upper section 1141 of the second return oil passage, and improves assembly efficiency. The throttling orifice design limits the amount of lubricating medium entering the first branch oil passage 142 from the main oil passage 13, so that the lubricating medium in the main oil passage 13 can be reasonably distributed to the second branch oil passage 141 and the first branch oil passage 142, ensuring that each branch has sufficient lubricating medium and improving the lubrication effect of the transmission assembly 1.

[0061] In some embodiments, the transmission assembly 1 may also be equipped with a filter press 192 and an oil cooler 193 on the main oil circuit 13. The filter press 192 can increase the pressure of the lubricating medium in the main oil circuit 13 to ensure that the lubricating medium can flow smoothly in the main oil circuit 13, the second branch oil circuit 141, and the first branch oil circuit 142. The oil cooler 193 can reduce the temperature of the lubricating medium, thereby cooling the transmission assembly 1 while lubricating the motor assembly 101 and the transmission gear set 102.

[0062] In some embodiments, a suction filter 191 may also be provided on the first oil inlet 151 and the second oil inlet 152. The cooling medium in the oil storage chamber 121 is filtered by the suction filter 191 before entering the first oil inlet 151 or the second oil inlet 152, which can prevent impurities from entering the first cavity 111 and affecting the operation of the motor assembly 101.

[0063] In some embodiments, the transmission component 1 can be designed or improved through three-dimensional simulation analysis. For example, the diameter of each oil injection hole 1414, each spray hole 1424, and each oil passage can be designed through simulation. Under the premise of meeting the lubrication requirements of the transmission component 1, the remaining amount of lubricating medium in the oil storage chamber 121 can enable the gear set 102 to agitate the oil. The liquid level of the lubricating medium in the oil storage chamber 121 can also be designed according to the actual requirements of the transmission component 1. However, it should be noted that the height of the liquid level should be reasonable. It should not be lower than the lowest point of the bottom of the gear set 102 to avoid the gear set 102 being unable to agitate the oil, nor should it be too high, otherwise it will affect the rotation of the gear set 102 and increase energy consumption.

[0064] In some embodiments, a lubrication system for the transmission assembly 1 can be developed, and the specific process is as follows: S1: Based on the initial structure of transmission component 1, use simulation tools to perform a one-dimensional simulation analysis at the system level, calculate the total flow rate entering each oil passage and the flow rate of each nozzle (i.e., spray nozzle 1424 and oil injection nozzle 1414); combine with the thermal balance oil temperature analysis of the lubrication system to determine the flow rate requirements, the diameter of each spray nozzle 1424 and each oil injection nozzle 1414; combine with the three-dimensional spray simulation analysis results to set the position and spray angle of each nozzle, etc.

[0065] S2: Apply one-dimensional simulation analysis to calculate the flow distribution of lubricating medium in motor assembly 101 and gear set 102; then use three-dimensional oil return simulation analysis to evaluate the effect of the oil return structure of the first cavity 111 and design the oil return hole (i.e., groove) structure; comprehensively evaluate the oil supply and return capacity of the lubrication system, and determine the initial amount of lubricating medium added and the liquid level height of the oil storage cavity 121 during operation.

[0066] S3: The viscosity of the lubricating medium is significantly affected by temperature. At high oil temperatures, the viscosity is low, resulting in low flow resistance and increased lubricating medium flow rate; at low oil temperatures, the viscosity is high, resulting in high flow resistance and decreased lubricating medium flow rate. The equilibrium temperature of the lubricating medium varies with the ambient temperature. In high-temperature environments, the equilibrium temperature of the lubricating medium is high, and the lubricating medium pressure is low; in low-temperature environments, the equilibrium temperature of the lubricating medium is low, and the lubricating medium pressure is high. The flow rate of the lubrication system differs significantly between high and low temperatures. One-dimensional simulation tools are used to analyze the lubricating medium flow rate and system oil pressure under different ambient temperatures, analyzing the correspondence between flow rate and oil pressure in the lubrication system under high and low temperature conditions, determining the opening pressure of the pressure relief valve, and meeting the flow rate requirements of the lubrication system under high and low temperature conditions.

[0067] S4: Lubrication system simulation, one-dimensional and three-dimensional analysis are carried out iteratively to optimize the lubrication system structure, determine the lubrication system scheme, and verify and finalize it in subsequent tests.

[0068] Attached image description: Figure 1 The arrows in the diagram indicate the direction of the lubricating medium flow. In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0069] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0070] In the description of this utility model, "multiple" means two or more.

[0071] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0072] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A transmission component, characterized in that, include: The outer shell (11) has a partition (113) inside it. The partition (113) defines a first cavity (111) and a second cavity (112) that are spaced apart from each other inside the outer shell (11). A motor assembly (101) is provided in the first cavity (111), and a speed-changing gear set (102) is provided in the second cavity (112). A first branch oil passage (142), at least a portion of which extends within the second cavity (112), is adapted to spray a lubricating medium toward the gear set (102); wherein The first branch oil passage (142) is provided with a branch oil passage (1425) inclined toward the partition (113), and the partition (113) is formed with a connecting oil passage (1131) extending from the second cavity (112) to the first cavity (111), and the lubricating medium is adapted to enter the first cavity (111) through the connecting oil passage (1131).

2. The transmission assembly according to claim 1, characterized in that, The partition (113) is provided with a plurality of interconnected ribs (1132), which enclose each other and form an oil collecting cavity (1133) located in the second cavity (112). The bottom of the oil collecting cavity (1133) has a connecting oil passage (1131) that passes through the partition (113), the top of the oil collecting cavity (1133) is open and the branch oil passage (1425) is open toward the oil collecting cavity (1133).

3. The transmission assembly according to claim 2, characterized in that, Also includes: The motor bearing (1011) is disposed in the first cavity (111) and supports the motor shaft of the motor assembly (101). The motor bearing (1011) is disposed at one end of the motor assembly (101) near the partition (113), and the connecting oil passage (1131) faces the motor bearing (1011).

4. The transmission assembly according to claim 2, characterized in that, Also includes: Bottom shell (12), the bottom shell (12) is connected to the outer shell (11), and an oil storage cavity (121) is formed inside the bottom shell (12) that communicates with at least one of the first cavity (111) and the second cavity (112). The main oil passage (13) is located on the partition (113). One end of the main oil passage (13) extends to the oil storage chamber (121), and the other end of the main oil passage (13) extends to the top of the outer shell (11) and communicates with the first branch oil passage (142). The second branch oil passage (141) is connected to the oil storage chamber (121) and the main oil passage (13) respectively and extends toward the first cavity (111). The second branch oil passage (141) is adapted to spray lubricating medium toward the motor assembly (101); wherein The second branch oil passage (141) and the first branch oil passage (142) are arranged alternately on the main oil passage (13).

5. The transmission assembly according to claim 4, characterized in that, The second branch oil circuit (141) includes: The first oil drain pipe (1411) extends along the axial direction of the motor assembly (101) and is connected to the main oil passage (13); The first oil-drenching ring (1412) is disposed on the inner wall of the first cavity (111) and communicates with the first oil-drenching pipe (1411); The second oil-draining ring (1413) is disposed on the inner wall of the first cavity (111) and communicates with the first oil-draining pipe (1411). The second oil-draining ring (1413) and the first oil-draining ring (1412) are arranged at intervals on both axial sides of the motor assembly (101). The first oil spray pipe (1411), the first oil spray ring (1412) and the second oil spray ring (1413) are respectively provided with oil spray holes (1414) that open toward the motor assembly (101).

6. The transmission assembly according to claim 5, characterized in that, The inner diameter of the first oil-spraying pipe (1411) is φ1, the inner diameter of the first oil-spraying ring (1412) and the inner diameter of the second oil-spraying ring (1413) are both φ2, and the first oil-spraying pipe (1411), the first oil-spraying ring (1412) and the second oil-spraying ring (1413) are respectively provided with a plurality of oil-spraying holes (1414) spaced apart from each other. The inner diameter of the oil-spraying holes (1414) is φ3, and satisfies: 0.2≤φ3 / φ1≤0.3; 0.6≤φ2 / φ1≤0.

7.

7. The transmission assembly according to claim 5, characterized in that, The first oil pipe (1411) is provided with a first return oil passage (17) communicating with the oil storage chamber (121) at one end away from the main oil passage (13); the bottom wall of the first cavity (111) is formed with a recessed groove, the groove extends along the axial direction of the motor assembly (101) and communicates with the oil storage chamber (121) to form the first return oil passage (17), and the cross section of the groove in the axial direction of the motor assembly (101) is an arc segment; a temporary storage chamber is formed in the first cavity (111) communicating with the groove and used to store the lubricating medium in the first cavity (111).

8. The transmission assembly according to claim 4, characterized in that, The first branch oil passage (142) is provided with a second oil spray pipe (1420) that communicates with the main oil passage (13). The second oil spray pipe (1420) extends along the axial direction of the motor assembly (101) and away from the motor assembly (101). The second oil spray pipe (1420) is provided with a first spray zone (1421), a second spray zone (1422) and a third spray zone (1423) that are spaced apart in sequence. Each spray zone is provided with a plurality of spray holes (1424) that are spaced apart from each other and facing the gear set (102). The diameter of the spray holes (1424) in the first spray zone (1421) is the same as the diameter of the spray holes (1424) in the second spray zone (1422) and is smaller than the diameter of the spray holes (1424) in the third spray zone (1423).

9. The transmission assembly according to any one of claims 1-8, characterized in that, Also includes: The rear shell (114) is located at the end of the second cavity (112) away from the partition (113). The rear shell (114) is provided with the upper section (1141) of the second return oil line and the lower section (1142) of the second return oil line. The upper section (1141) and the lower section (1142) of the second return oil line are respectively connected to the oil chamber of the rotating shaft of the gear set (102). One end of the upper section (1141) of the second return oil line is connected to the first branch oil line (142).

10. The transmission assembly according to claim 9, characterized in that, The main oil passage (13) is located on the partition (113). The first branch oil passage (142) is provided with a throttle hole at one end near the main oil passage (13). The first branch oil passage (142) is provided with a variable diameter section at one end away from the main oil passage (13). The variable diameter section is connected to the upper part (1141) of the second return oil passage. The diameter of the variable diameter section gradually decreases in the direction away from the main oil passage (13).

Images