Large-torque light truck electro-hydraulic AMT transmission shell

Abstract

The utility model relates to a large-torque light truck electro-hydraulic AMT transmission shell which solves the technical problem that the large-torque requirement of a light truck AMT cannot be met in the prior art. The utility model comprises a body, an electro-hydraulic actuating mechanism mounting hole, an electro-hydraulic actuating mechanism oil duct, a sensor mounting hole, a gear selecting and shifting actuating mechanism mounting hole, a controller mounting hole and a lubricating oil duct, wherein the electro-hydraulic actuating mechanism mounting hole, the electro-hydraulic actuating mechanism oil duct, the sensor mounting hole, the gear selecting and shifting actuating mechanism mounting hole and the controller mounting hole are arranged on the body; the periphery of the front face of the body protrudes and is provided with installation reinforcing ribs. The top surface is provided with latticed top surface reinforcing ribs; a latticed right surface reinforcing rib is arranged above the right surface; the electro-hydraulic actuating mechanism mounting hole and the electro-hydraulic actuating mechanism oil duct are both positioned above the right surface, and reinforcing ribs are arranged on the peripheral surfaces of the electro-hydraulic actuating mechanism mounting hole and the electro-hydraulic actuating mechanism; the sensor mounting hole is formed in the right surface close to the left middle; a latticed left surface reinforcing rib is arranged on the left surface; the controller mounting holes are located above and below the left face, and reinforcing ribs are arranged on the peripheral face of the controller mounting holes.

Description

Technical Field

[0001] This utility model relates to a transmission housing, specifically to a high-torque light truck electro-hydraulic AMT transmission housing. Background Technology

[0002] As the automotive industry raises its requirements, companies are accelerating their investment in vehicle automation. Automated manual transmissions (AMT) have become an important choice and an inevitable trend in the development of commercial vehicles due to their advantages such as high mechanical efficiency, low power loss, reliable operation, convenient operation, and compact structure, and have broad development prospects.

[0003] Currently, most light truck AMTs on the market use a modular pneumatic technology approach, attaching the transmission controller (TCU), operating device assembly, clutch actuator, etc., to the outside of the transmission. Although the cost is relatively low and the manufacturing process is simple, problems such as excessive shifting force, complex wiring harness layout, large space occupation, and high noise result in poor comfort and limited application scenarios, restricting their large-scale promotion and use. In contrast, the electro-hydraulic technology approach has advantages over the pneumatic approach, including no dependence on air source, high integration, compact structure, high shifting quality, high comfort, and low noise. It is gradually gaining market recognition, and it is estimated that electro-hydraulic AMT will become an important upgrade direction in the light truck field. In the future, ordinary light truck engines will develop towards higher horsepower, higher torque, and lower weight. The input torque of a typical light truck AMT is below 500Nm.

[0004] Chinese patent CN112943920A discloses a six-speed electro-hydraulic AMT assembly, including a six-speed AMT, a gear selector actuator, an electro-hydraulic actuator, hydraulic oil lines, and a release bearing. The gear selector actuator is an electric type, mounted on the housing of the six-speed AMT, with one end extending into the interior of the AMT. The electro-hydraulic actuator is also mounted on the housing of the six-speed AMT, with one end connected to the release bearing via hydraulic oil lines. The release bearing is also mounted on the housing of the six-speed AMT. In operation, the release bearing engages with the clutch, and the electro-hydraulic actuator controls the disengagement and engagement of the release bearing and the clutch. This patent provides a solution that offers smooth gear shifting while also being compact and small in size. Chinese patent CN114635961A discloses an integrated hydraulic circuit structure, including an electro-hydraulic actuator, a gearbox housing, a clutch housing, a release bearing, an oil pipe assembly, a housing oil passage A, and a housing oil passage B. The release bearing and electro-hydraulic actuator are both mounted on the gearbox housing. Housing oil passages A and B are located inside the gearbox housing. The oil pipe assembly is mounted on the clutch housing. One end of the electro-hydraulic actuator has a first oil outlet inserted into housing oil passage A. One end of the oil pipe assembly is inserted into housing oil passage B, and the other end is inserted into the second oil outlet of the release bearing. This patent's hydraulic circuit structure is highly integrated, reducing the design difficulty of individual pipelines. It also features a simpler structure, higher reliability, lower cost, and easier maintenance. However, neither of these housing structures can meet the increasingly high torque requirements of light truck AMTs. Utility Model Content

[0005] The purpose of this utility model is to solve the technical problem that the existing technology cannot meet the high torque requirements of light truck AMT, and to provide a high torque light truck electro-hydraulic AMT transmission housing.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A housing for a high-torque light truck electro-hydraulic AMT transmission includes a body, an electro-hydraulic actuator mounting hole, an electro-hydraulic actuator oil passage, a sensor mounting hole, a shift actuator mounting hole, a controller mounting hole, and a lubricating oil passage inside the body.

[0008] Definition: The end face that connects to the clutch housing is the front face, the end face that connects to the rear cover housing is the back face, and the end face with the gear shifting actuator mounting hole is the top face;

[0009] The front of the main body has a through bearing mounting hole;

[0010] Its special feature is:

[0011] The lubrication passage is located on the outer ring of the body at the end near the reverse side of the bearing mounting hole;

[0012] The outer periphery of the front of the main body protrudes from the top, bottom, left and right surfaces, and reinforcing ribs are respectively provided between the top, bottom, left and right surfaces. The reinforcing ribs are perpendicular to the front, top, bottom, left and right surfaces.

[0013] The top surface of the main body and the outer surface of the mounting hole of the gear shifting actuator are provided with grid-like top surface reinforcing ribs;

[0014] The upper right side of the main body is provided with a grid-like right-side reinforcing rib; there are two mounting holes for the electro-hydraulic actuator, and both the mounting holes and the oil passages for the electro-hydraulic actuator are located in the middle position of the upper right side; the outer circumferential surfaces of the mounting holes and the oil passages for the electro-hydraulic actuator are provided with reinforcing ribs perpendicular to the right side; the sensor mounting hole is located on the right side near the middle of the left side.

[0015] The left side of the main body is provided with a grid-like left-side reinforcing rib; the interface of the gear shifting actuator mounting hole is located on the upper left side; there are four controller mounting holes, located on the upper and lower left sides respectively; the outer periphery of the controller mounting hole is provided with a reinforcing rib perpendicular to the left side.

[0016] Furthermore, a first wire harness guide plate is provided on the lower front of the main body, and a second wire harness guide plate is provided on the lower left side; wire harness fixing posts are provided on the left side and right side of the main body; wire harness mounting holes are provided on the first wire harness guide plate and the second wire harness guide plate.

[0017] Furthermore, there are three wire harness fixing posts on the left side of the main body, evenly distributed in the vertical direction; there are three wire harness fixing posts on the right side of the main body, located on the protruding part of the front periphery of the main body, and evenly distributed in the vertical direction.

[0018] Furthermore, the first wire harness guide plate has four wire harness mounting holes; the second wire harness guide plate has three wire harness mounting holes.

[0019] Furthermore, the grid direction of the right reinforcing rib forms a 45° angle with the front; the grid direction of the left reinforcing rib forms a 45° angle with the front.

[0020] Furthermore, the grid direction of the top surface reinforcing ribs is either parallel or perpendicular to the front surface.

[0021] Furthermore, the reinforcing ribs, top reinforcing ribs, right reinforcing ribs, left reinforcing ribs, as well as the reinforcing ribs on the outer periphery of the electro-hydraulic actuator mounting holes, electro-hydraulic actuator oil passages, and controller mounting holes, all have a smooth transition to the surfaces they contact.

[0022] Furthermore, the first wire harness guide plate, the second wire harness guide plate, and the wire harness fixing post are formed in one step using a housing mold.

[0023] Furthermore, the lubrication passage includes a first lubrication passage and a second lubrication passage;

[0024] With the reverse side to the front side as the main viewing direction; a housing guide groove is provided on the upper left of the outer ring of the bearing mounting hole, extending away from the front side and opening upward, the housing guide groove forming the housing oil passage; the first lubricating oil passage is opened on the body located on the upper left of the outer ring of the bearing mounting hole, corresponding to the housing oil passage; the second lubricating oil passage is opened on the body located on the lower right of the outer ring of the bearing mounting hole.

[0025] The first lubricating oil passage connects the housing oil passage with the bearing mounting hole, collecting the lubricating oil and channeling it into the bearing.

[0026] The second lubrication channel connects the bearing mounting hole with the inner cavity of the bearing body, allowing lubricating oil to flow out of the bearing and form an oil circulation.

[0027] Furthermore, the housing guide groove includes an arc-shaped base plate and an end plate located at one end of the arc-shaped base plate, and the other end of the arc-shaped base plate is connected to the inner side of the front.

[0028] The advantages of this utility model compared to the prior art are:

[0029] 1. This utility model relates to a high-torque light truck electro-hydraulic AMT transmission housing. By redesigning the layout of the transmission housing and designing reinforcing ribs in corresponding positions, the transmission housing can meet the requirements of high-torque engines and the strength requirements of light truck AMT torque increase.

[0030] 2. This utility model discloses a high-torque light truck electro-hydraulic AMT transmission housing. Through the design of a first wiring harness guide plate, a second wiring harness guide plate, and a wiring harness fixing post, the wiring harness is fixed to the transmission housing by a snap-fit ​​installation, which ensures the safety of the wiring harness and can effectively save space and facilitate vehicle installation.

[0031] 3. This utility model discloses a high-torque light truck electro-hydraulic AMT transmission housing. After oil flow analysis, the design incorporates lubrication channels with reasonable structure, position, and size, resulting in a larger oil flow rate inside the housing. During transmission operation, splashed lubricating oil can flow into the bearing position through the lubrication channels, fully lubricating the front bearing during oil circulation. This improves the internal oil circulation lubrication capacity of the transmission and thus extends the life of the transmission bearings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of a high-torque light-duty truck electro-hydraulic AMT transmission housing according to this utility model. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0034] Figure 3 This is a schematic diagram showing the position of the wire harness in an embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the location of the lubricating oil passage in an embodiment of this utility model, wherein the red arrow indicates the flow direction of the lubricating oil;

[0036] Figure 5 This is a partially enlarged structural view of the first lubricating oil passage in an embodiment of this utility model, wherein the red arrow indicates the flow direction of the lubricating oil;

[0037] Figure 6 This is a partially enlarged structural view of the reinforcing rib in an embodiment of this utility model;

[0038] Figure 7 This is a schematic diagram showing the effect after assembly of an embodiment of this utility model.

[0039] The reference numerals in the attached figures are explained as follows: 1-Body; 2-Electro-hydraulic actuator mounting hole; 3-Electro-hydraulic actuator oil passage; 4-First wiring harness guide plate; 5-Wire harness fixing post; 6-Sensor mounting hole; 7-Gear shifting actuator mounting hole; 8-Controller mounting hole; 9-Second wiring harness guide plate; 10-Wire harness mounting hole; 11-Lubricating oil passage.

[0040] 12-Wire harness; 13-Electro-hydraulic actuator; 14-Gear shifting actuator; 15-Controller; 16-Intermediate shaft; 17-First lubrication passage; 18-Second lubrication passage; 19-Housing guide groove;

[0041] A - Front; B - Back; C - Top; D - Left; E - Right. Detailed Implementation

[0042] The specific technical solutions in the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0043] See Figures 1-2 , Figure 7 A housing for a high-torque light-duty truck electro-hydraulic AMT transmission includes a body 1, an electro-hydraulic actuator mounting hole 2, an electro-hydraulic actuator oil passage 3, a first wiring harness guide plate 4, a wiring harness fixing post 5, a sensor mounting hole 6, a shift actuator mounting hole 7, a controller mounting hole 8, a second wiring harness guide plate 9, and a lubrication oil passage 11 disposed on the body 1. The lubrication oil passage 11 is a wiring system with grooves or holes at required locations to increase oil circulation.

[0044] Definition: The end face of the body 1 that connects to the clutch housing is the front face A, the end face that connects to the rear cover housing is the back face B, and the end face with the gear shifting actuator mounting hole 7 is the top face C.

[0045] See Figures 4-5 Compared to the original oil passage, the size of the oil passage hole has been improved according to the characteristics of high torque, increasing the lubricating oil throughput. Its oil passage design is reasonable and meets the lubrication requirements of the mating internal parts. The lubricating oil passage 11 includes a first lubricating oil passage 17 and a second lubricating oil passage 18; with the direction from the reverse side B to the front side A as the main viewing direction; a housing guide groove 19 is provided on the upper left of the outer ring of the bearing mounting hole, extending away from the front side A and opening upward, and the housing guide groove 19 constitutes the housing oil passage; the first lubricating oil passage 17 is opened on the upper left of the outer ring of the body 1 corresponding to the housing oil passage; the second lubricating oil passage 18 is opened on the lower right of the outer ring of the body 1 located at the bearing mounting hole; the first lubricating oil passage 17 connects the housing oil passage and the bearing mounting hole; the second lubricating oil passage 18 connects the bearing mounting hole and the inner cavity of the body 1. The housing guide groove 19 is specifically composed of an arc-shaped base plate and an end plate located at one end of the arc-shaped base plate. The highest point of the end plate is higher than the upper edge of the arc-shaped base plate, and the other end of the arc-shaped base plate is connected to the inner side of the front side A.

[0046] The front A of the main body 1 is provided with a bearing mounting hole that runs through both the inside and outside; the lubricating oil passage 11 is provided on the outer ring of the main body 1 at the end of the bearing mounting hole near the reverse side B (i.e., inside the housing).

[0047] The front surface A of the main body 1 protrudes from the top surface C, bottom surface, left surface D, and right surface E, and is provided with mounting reinforcing ribs between the front surface A and the top surface C, bottom surface D, left surface D, and right surface E respectively; the mounting reinforcing ribs are perpendicular to the front surface A and the top surface C, bottom surface D, left surface D, and right surface E respectively.

[0048] The top surface C of the main body 1 and the outer surface of the gear shifting actuator mounting hole 7 are provided with a grid-like top surface reinforcing rib. The grid direction of the top surface reinforcing rib is either parallel to or perpendicular to the front surface A.

[0049] The upper right side (E) of the main body 1 has a grid-like reinforcing rib. There are two electro-hydraulic actuator mounting holes 2, both located in the middle of the upper right side, with their positions determined by the specific electro-hydraulic actuator to be installed. The outer circumference of both the mounting holes 2 and the oil passage 3 has reinforcing ribs perpendicular to the right side (E). The sensor mounting hole 6 is located on the right side (E) near the middle of the left side. The grid direction of the right-side reinforcing ribs forms a 45° angle with the front side (A).

[0050] The electro-hydraulic actuator 13 (EHA) is installed in the electro-hydraulic actuator mounting hole 2. The position of the hydraulic release bearing is controlled by forming oil pressure in the oil passage 3 of the electro-hydraulic actuator, thereby realizing the separation of the clutch.

[0051] Sensor mounting hole 6 is used to mount the corresponding sensor to collect signals, such as speed and oil temperature, and these signals are transmitted through wiring harness 12.

[0052] The left side D of the main body 1 is provided with a grid-like left-side reinforcing rib; the interface of the gear shifting actuator mounting hole 7 is located above the left side D; there are four controller mounting holes 8, located above and below the left side D near the middle; the outer periphery of the controller mounting holes 8 is provided with reinforcing ribs perpendicular to the left side D. The grid direction of the left-side reinforcing ribs forms an angle of 45° with the front side A.

[0053] The gear shifting actuator 14 (SSA) is installed in the gear shifting actuator mounting hole 7 to perform the gear shifting function as needed.

[0054] The controller mounting hole 8 houses the controller 15 (TCU), which processes the collected signals and controls the clutch and transmission gears based on the driving environment and recognition strategy.

[0055] See Figure 3 The first wire harness guide plate 4 is located below the front A of the main body 1, and the second wire harness guide plate 9 is located below the left D of the main body 1. Corresponding wire harness fixing posts 5 are provided on the left side of the left D and the left side of the right E of the main body 1. There are three wire harness fixing posts 5 on the left side of the left D of the main body 1, evenly distributed vertically. There are also three wire harness fixing posts 5 on the left side of the right E of the main body 1, located on the protruding portion of the outer periphery of the front A of the main body 1, and evenly distributed vertically. The first wire harness guide plate 4 and the second wire harness guide plate 9 are provided with wire harness mounting holes 10. The first wire harness guide plate 4 has four wire harness mounting holes 10, and the second wire harness guide plate 9 has three wire harness mounting holes 10.

[0056] See Figure 7 In this embodiment of the utility model, the reinforcing ribs, top reinforcing ribs, right reinforcing ribs, left reinforcing ribs, and the reinforcing ribs on the outer periphery of the electro-hydraulic actuator mounting hole 2, the electro-hydraulic actuator oil passage 3, and the controller mounting hole 8, all have smooth transitions to the surfaces they contact.

[0057] In this embodiment of the utility model, the first wire harness guide plate 4, the second wire harness guide plate 9, and the wire harness fixing post 5 are all formed in one step by the housing mold, while the electro-hydraulic actuator mounting hole 2, the electro-hydraulic actuator oil passage 3, the sensor mounting hole 6, the gear shifting actuator mounting hole 7, the controller mounting hole 8, and the wire harness mounting hole 10 are obtained by machining.

[0058] The installation method of this utility model embodiment is as follows:

[0059] See Figure 6After the wiring harness 12 is arranged smoothly, the clips on the wiring harness 12 are installed on the wiring harness fixing post 5. The bottom wiring harness is arranged in the first wiring harness guide plate 4 and the second wiring harness guide plate 9, and fixed by cable ties through the wiring harness mounting hole 10. The sensor is interference-fitted into the sensor mounting hole 6. The electro-hydraulic actuator 13, the gear shifting actuator 14, and the controller 15 are respectively installed in the electro-hydraulic actuator mounting hole 2, the gear shifting actuator mounting hole 7, and the controller mounting hole 8 by bolts.

[0060] The working principle of this utility model embodiment is as follows:

[0061] During operation, the transmission assembly's sensors collect various signals, which are transmitted via wiring harness 12. When the system detects a need for gear shifting based on collected signals such as throttle opening, braking status, vehicle weight, and road conditions, the control unit of the electro-hydraulic actuator 13 receives a controller signal. This signal, via a motor and ball screw, moves the piston, squeezing hydraulic oil from the hydraulic chamber into the electro-hydraulic actuator's oil passage 3, thus disengaging the hydraulic release bearing and disengaging the clutch. The gear shift actuator 14 is directly controlled by the controller 15. Upon receiving a shift signal from the controller 15, it moves the gear and worm gear and rotates the shift paddle to execute the gear shifting action.

[0062] During operation, the intermediate shaft 16 rotates and stirs the lubricating oil inside the housing, causing the lubricating oil to splash. The splashed lubricating oil is collected by the housing guide groove 19, then enters the bearing mounting hole through the first lubricating oil passage 17, and finally flows out of the bearing mounting hole through the second lubricating oil passage 18 to form an oil circulation. During the oil circulation process, the lubricating oil can fully lubricate the front bearing and improve the life of the transmission bearing.

[0063] The above description is merely an embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model. For those skilled in the art, it will be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A housing for a high-torque light truck electro-hydraulic AMT transmission, comprising a body (1), an electro-hydraulic actuator mounting hole (2), an electro-hydraulic actuator oil passage (3), a sensor mounting hole (6), a gear shifting actuator mounting hole (7), a controller mounting hole (8) disposed on the body (1), and a lubricating oil passage (11) disposed inside the body (1); Definition: The end face of the body (1) connected to the clutch housing is the front face (A), the end face connected to the rear cover housing is the back face (B), and the end face with the gear shifting actuator mounting hole (7) is the top face (C); The front (A) of the main body (1) is provided with a bearing mounting hole that runs through both the inside and outside; Its features are: The lubrication channel (11) is located on the outer ring of the body (1) at the end near the reverse side (B) of the bearing mounting hole; The front (A) of the main body (1) protrudes from the top (C), bottom, left (D) and right (E) surfaces, and is provided with mounting reinforcing ribs between the top (C), bottom, left (D) and right (E) surfaces respectively. The mounting reinforcing ribs are perpendicular to the front (A) surface and the top (C), bottom, left (D) and right (E) surfaces respectively. The top surface (C) of the main body (1) and the outer surface of the gear shifting actuator mounting hole (7) are provided with grid-like top surface reinforcing ribs; The right side (E) of the main body (1) is provided with a grid-like right-side reinforcing rib; there are two electro-hydraulic actuator mounting holes (2), and both the electro-hydraulic actuator mounting holes (2) and the electro-hydraulic actuator oil passage (3) are located in the middle position above the right side (E); the outer peripheral surfaces of the electro-hydraulic actuator mounting holes (2) and the electro-hydraulic actuator oil passage (3) are provided with reinforcing ribs perpendicular to the right side (E); the sensor mounting hole (6) is located on the right side (E) near the middle of the left side; The left side (D) of the main body (1) is provided with a grid-like left side reinforcing rib; the interface of the gear shifting actuator mounting hole (7) is located above the left side (D); there are four controller mounting holes (8), located above and below the left side (D); the outer peripheral surface of the controller mounting hole (8) is provided with a reinforcing rib perpendicular to the left side (D).

2. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 1, characterized in that: The main body (1) has a first wire harness guide plate (4) below the front (A) and a second wire harness guide plate (9) below the left (D); The main body (1) has wire harness fixing posts (5) on the left side (D) and the right side (E); The first wire harness guide plate (4) and the second wire harness guide plate (9) are provided with wire harness mounting holes (10).

3. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 2, characterized in that: There are three wire harness fixing posts (5) on the left side (D) of the main body (1), which are evenly distributed in the vertical direction; There are three wire harness fixing posts (5) on the left side of the right side (E) of the main body (1), located on the outer periphery of the front side (A) of the main body (1) and evenly distributed in the vertical direction.

4. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 2, characterized in that: The first wire harness guide plate (4) has four wire harness mounting holes (10); The second wire harness guide plate (9) has three wire harness mounting holes (10).

5. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 1, characterized in that: The grid direction of the right-side reinforcing rib forms an angle of 45° with the front (A); The grid direction of the left-side reinforcing rib forms an angle of 45° with the front (A).

6. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 1, characterized in that: The grid direction of the top reinforcing ribs is either parallel or perpendicular to the front surface (A).

7. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 1, characterized in that: The reinforcing ribs, top reinforcing ribs, right reinforcing ribs, left reinforcing ribs, and the reinforcing ribs on the outer periphery of the electro-hydraulic actuator mounting hole (2), electro-hydraulic actuator oil passage (3), and controller mounting hole (8) all have smooth transitions to the surfaces they contact.

8. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 2, characterized in that: The first wire harness guide plate (4), the second wire harness guide plate (9), and the wire harness fixing post (5) are formed in one step by the housing mold.

9. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 1, characterized in that: The lubrication channel (11) includes a first lubrication channel (17) and a second lubrication channel (18); With the reverse side (B) to the front side (A) as the main viewing direction; the outer ring of the bearing mounting hole is provided with a housing guide groove (19) extending in a direction away from the front side (A) and opening upward, the housing guide groove (19) constitutes a housing oil passage; the first lubricating oil passage (17) is opened on the body (1) at the position corresponding to the housing oil passage on the upper left of the outer ring of the bearing mounting hole; the second lubricating oil passage (18) is opened on the body (1) at the lower right of the outer ring of the bearing mounting hole; The first lubricating oil passage (17) connects the housing oil passage and the bearing mounting hole; The second lubricating oil passage (18) connects the bearing mounting hole with the inner cavity of the body (1).

10. The housing of a high-torque light-duty truck electro-hydraulic AMT transmission according to claim 9, characterized in that: The housing guide groove (19) includes an arc-shaped bottom plate and an end plate located at one end of the arc-shaped bottom plate, and the other end of the arc-shaped bottom plate is connected to the inner side of the front (A).

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