Sectional type electric drive axle shell

Abstract

The invention belongs to the technical field of drive axles of new energy vehicles, and relates to a sectional type electric drive axle shell. The device comprises a left shell, a middle shell and a right shell, wherein the left shell is connected with the right shell through the middle shell; a left axle tube structure and a left suspension interface are arranged on the left shell, and a front transmission mounting cavity and a rear transmission mounting cavity are formed between the left shell and the middle shell; a right suspension interface and a right shaft tube structure are arranged on the right shell; a front motor mounting cavity and a rear motor mounting cavity are formed between the right shell and the middle shell; the middle shell is provided with a rear motor high-voltage connecting plug connector, a front motor high-voltage connecting plug connector and a shaft tube communicating shaft hole. The shaft hole in the left shaft tube structure, the shaft hole in the right shaft tube structure and the shaft tube communicating shaft hole are communicated. The sectional type electric drive axle shell is high in integration level and high in space utilization rate, the size of the overall structure is reduced, and the arrangement space of a transmission can be increased easily.

Description

Technical Field

[0001] The invention belongs to the technical field of drive axles for new energy vehicles and relates to a segmented electric drive axle housing. Background Art

[0002] In recent years, the trend of new energy for commercial vehicles has become increasingly obvious, and the penetration rate of new energy for commercial vehicles has continued to rise. As the most advanced solution in the field of drive and transmission technology for new energy commercial vehicles, the electric drive axle is highly valued by the OEMs for its high integration, short transmission line, high transmission efficiency, and light system weight. Compared with the relatively traditional central drive solution of replacing the engine with an electric motor, the electric drive axle can have battery packs arranged on both sides of the frame, which not only greatly increases the battery pack capacity, but also reduces the center of mass of the vehicle and improves vehicle stability. The high degree of integration of the electric drive axle eliminates the drive shaft, and integrates the motor, transmission, and axle, which greatly reduces the overall mass of the drive system, which is conducive to improving the vehicle's cruising range.

[0003] However, the current electric drive axle integration mostly uses the traditional axle housing, and the motor, transmission, and axle are independent of each other, with a low degree of integration. This solution has many restrictions on transmission design, resulting in a larger overall size of the electric drive axle and low space utilization. Summary of the invention

[0004] The purpose of the present invention is to provide a segmented electric drive axle housing to solve the technical problems of low integration and low space utilization of current electric drive axles. The segmented electric drive axle housing of the present invention has high integration and high space utilization, which is conducive to reducing the volume of the overall structure and facilitating the layout of the transmission.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention discloses a segmented electric drive axle housing, comprising: A left shell, a middle shell and a right shell, wherein the left shell is connected to the right shell through the middle shell; The left housing is provided with a left axle tube structure and a left suspension interface, and a front transmission mounting cavity and a rear transmission mounting cavity are formed between the left housing and the middle housing; The right housing is provided with a right suspension interface and a right axle tube structure, and a front motor installation cavity and a rear motor installation cavity are formed between the right housing and the middle housing; The middle shell is provided with a rear motor high-voltage plug connector interface, a front motor high-voltage plug connector interface and an axle tube connecting shaft hole, and the shaft hole inside the left axle tube structure, the shaft hole inside the right axle tube structure and the axle tube connecting shaft hole are connected.

[0006] Furthermore, a left brake bracket is also provided on the left shell body, and the left brake bracket is located between the left axle tube structure and the left suspension interface, and the left brake bracket is used for installing the left brake.

[0007] Furthermore, the left housing is also provided with a left bearing hole of the rear transmission and a left bearing hole of the front transmission, and the middle housing is also provided with a right bearing hole of the front transmission and a right bearing hole of the rear transmission; The left bearing hole of the front transmission and the right bearing hole of the front transmission are both in communication with the front transmission mounting cavity, and the front transmission mounting cavity, the left bearing hole of the front transmission and the right bearing hole of the front transmission are used for mounting the front transmission; The rear transmission left bearing hole and the rear transmission right bearing hole are both connected to the rear transmission mounting cavity, and the rear transmission left bearing hole, the rear transmission mounting cavity and the rear transmission right bearing hole are used to mount the rear transmission; The left bearing hole of the front transmission and the left bearing hole of the rear transmission are located on both sides of the shaft hole inside the left shaft tube structure; The right bearing hole of the front transmission and the right bearing hole of the rear transmission are located on both sides of the shaft tube connecting shaft hole.

[0008] Furthermore, the left housing is also provided with a bearing cover interface, a control assembly interface and a filter interface, and the filter interface is located between the left housing and the middle housing; The bearing cover interface is used to install the transmission bearing cover; The control assembly interface is used to install the electric control unit; The filter interface is used for installing a transmission oil filter.

[0009] Furthermore, a right brake bracket is also provided on the right shell body, and the right brake bracket is located between the right suspension interface and the right axle tube structure, and the right brake bracket is used to install the right brake.

[0010] Furthermore, the right housing is provided with a front motor bearing hole and a rear motor bearing hole, and the middle housing is provided with a front motor cavity and a rear motor cavity; The front motor cavity and the right housing together form a front motor installation cavity, the front motor bearing hole is communicated with the front motor installation cavity, and the front motor bearing hole and the front motor installation cavity are used to install the front motor; The rear motor cavity and the right housing together form a rear motor mounting cavity, the rear motor bearing hole is connected to the rear motor mounting cavity, and the rear motor bearing hole and the rear motor mounting cavity are used to mount the rear motor; The front motor bearing hole and the rear motor bearing hole are located on both sides of the shaft hole inside the right shaft tube structure; The front motor cavity and the rear motor cavity are located on both sides of the shaft hole connected to the shaft tube.

[0011] Furthermore, the left shell body is also provided with an X-push left bracket interface, and the X-push left bracket interface is located above the left shell body. The right shell body is also provided with an X-push right bracket interface, and the X-push right bracket interface is located above the right shell body. Both the X-push left bracket interface and the X-push right bracket interface are used to connect with the entire vehicle through the X-push bracket.

[0012] Furthermore, an electronic oil pump interface and a heat exchange island are provided on the middle shell, an oil channel is opened in the middle shell, and the electronic oil pump interface is connected to the heat exchange island through the oil channel; A V-push bracket interface is provided on the middle shell, and the V-push bracket interface is used to connect the V-push bracket.

[0013] Furthermore, a differential lock switch interface is provided on the right shell body, a differential lock operating cavity is opened inside the middle shell body, the differential lock operating cavity and the right shell body together form a differential lock installation cavity, the differential lock switch interface is connected to the differential lock installation cavity, the differential lock installation cavity is located between the front motor installation cavity and the rear motor installation cavity, and the differential lock operating cavity is located at the top of the middle shell body.

[0014] Furthermore, a left wheel hub is sleeved on the left shaft tube structure, a bearing is arranged between the left wheel hub and the left shaft tube structure, a left half shaft is passed through the shaft hole inside the left shaft tube structure, and the left half shaft is connected to the left wheel hub; A right wheel hub is sleeved on the right shaft tube structure, a bearing is arranged between the right wheel hub and the right shaft tube structure, a right half shaft is passed through the shaft hole inside the right shaft tube structure, and the right half shaft is connected to the right wheel hub.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The bridge housing of the present invention adopts a three-stage design, which is different from the traditional design in which the transmission housing, motor housing, and bridge housing are independent of each other. The present invention reconstructs the structure and highly integrates the nine large housings of the bridge housing, front transmission housing, front transmission rear cover, front motor housing, front motor end cover, rear transmission housing, rear transmission rear cover, rear motor housing, and rear motor end cover into three housings of left housing, middle housing, and right housing, which greatly improves the integration and space utilization. Due to the high integration, the volume of the overall structure is reduced, which is conducive to increasing the layout space of the transmission, and the flexibility of the transmission layout is higher, which is conducive to improving the transmission efficiency. The left housing is provided with a left shaft tube structure and a left suspension interface, and the left shaft tube structure is used to install the left half shaft. The right housing is provided with a right suspension interface and a right shaft tube structure, and the right shaft tube structure is used to install the right half shaft. The left suspension interface and the right suspension interface are used to match different supports, and the vehicle suspension system is connected through the supports. The middle housing is provided with a rear motor high-voltage plug connector interface, a front motor high-voltage plug connector interface and a shaft tube connecting shaft hole, and the rear motor high-voltage plug connector interface and the front motor high-voltage plug connector interface are used to centrally arrange the motor high-voltage wiring harness interface, reduce the cable length and electromagnetic interference, and improve electrical safety. The shaft hole inside the left shaft tube structure, the shaft hole inside the right shaft tube structure and the shaft tube connecting shaft hole are connected to form a continuous power transmission channel to improve transmission efficiency. The segmented electric drive axle housing of the present invention has high integration and high space utilization, which is conducive to reducing the volume of the overall structure and facilitating the arrangement of the transmission.

[0016] The present invention sets a heat exchange island structure, and the front and rear transmissions and the front and rear motor oil circuits can match a single large-size heat exchanger through the heat exchange island, which is beneficial to reducing the number of heat exchangers and the length of water pipes, and can ensure that the overall appearance of the electric drive bridge is more regular and beautiful; The present invention is provided with a differential lock operating cavity, and the differential lock operating housing is integrated on the housing and placed on the upper side of the housing, the differential lock housing is eliminated, the joint surface is reduced, and the risk of oil leakage from the drive axle is reduced. At the same time, it is convenient for the layout of the whole vehicle and avoids the interference between the brake system parts and the differential lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a segmented electric drive bridge of the present invention.

[0018] Figure 2 It is a schematic diagram of a shell with only three sections according to the present invention.

[0019] Figure 3 It is a schematic diagram of the left side structure of the left shell of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the right side of the left shell of the present invention.

[0021] Figure 5It is a schematic diagram of the left side structure of the middle shell of the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the right side of the middle shell of the present invention.

[0023] Figure 7 It is a schematic diagram of the left side structure of the right shell of the present invention.

[0024] Figure 8 It is a schematic diagram of the right side structure of the right shell of the present invention.

[0025] Among them: 1. Left housing; 2. Middle housing; 3. Right housing; 4. Left wheel hub; 5. Left brake; 6. Left half shaft; 7. Right half shaft; 8. Right wheel hub; 9. Right brake; 101. Left axle tube structure; 102. Left brake bracket; 103. Left suspension interface; 104. Bearing cover interface; 105. Control assembly interface; 106. X-push left bracket interface; 107. Left bearing hole of rear transmission; 108. Filter interface; 109. Left bearing hole of front transmission; 110. Left housing flange surface; 201. Right bearing hole of front transmission; 202. Right bearing hole of rear transmission; 203. Electronic oil pump interface; 204, left flange surface of middle housing; 205, rear motor high-voltage plug connector interface; 206, heat exchange island; 207, V-push bracket interface; 208, front motor high-voltage plug connector interface; 209, differential lock operating cavity; 210, front motor cavity; 211, rear motor cavity; 212, right flange surface of middle housing; 301, front motor bearing hole; 302, rear motor bearing hole; 303, X-push right bracket interface; 304, right suspension interface; 305, right housing flange surface; 306, right brake bracket; 307, right axle tube structure; 308, differential lock switch interface. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1 and Figure 2 The present invention discloses a segmented electric drive axle housing, comprising: A left shell 1, a middle shell 2 and a right shell 3, wherein the left shell 1 is connected to the right shell 3 through the middle shell 2; See also Figure 2 The left housing 1 is provided with a left shaft tube structure 101 and a left suspension interface 103. The left shaft tube structure 101 is used to install the left half shaft 6. The left suspension interface 103 is used to connect the vehicle suspension system. A front transmission mounting cavity and a rear transmission mounting cavity are formed between the left housing 1 and the middle housing 2. The front transmission mounting cavity is used to install the front transmission, and the rear transmission mounting cavity is used to install the rear transmission.

[0029] See also Figure 2 The right housing 3 is provided with a right suspension interface 304 and a right axle tube structure 307, and the right axle tube structure 307 is used to install the right half shaft 7. The right suspension interface 304 is used to connect the vehicle suspension system. A front motor mounting cavity and a rear motor mounting cavity are formed between the right housing 3 and the middle housing 2, and the front motor mounting cavity is used to install the front motor, and the rear motor mounting cavity is used to install the rear motor.

[0030] See also Figure 2 The middle housing 2 is provided with a rear motor high-voltage plug connector interface 205, a front motor high-voltage plug connector interface 208 and a shaft tube connecting shaft hole. The rear motor high-voltage plug connector interface 205 and the front motor high-voltage plug connector interface 208 are used to centrally arrange the motor high-voltage wire harness interface, reduce the cable length and electromagnetic interference, and improve electrical safety. The shaft hole inside the left shaft tube structure 101, the shaft hole inside the right shaft tube structure 307 and the shaft tube connecting shaft hole are connected to form a continuous power transmission channel to improve transmission efficiency.

[0031] Preferably, see Figure 3The left housing 1 is also provided with a left brake bracket 102 , and the left brake bracket 102 is located between the left axle tube structure 101 and the left suspension interface 103 , and the left brake bracket 102 is used to install the left brake 5 .

[0032] Preferably, see Figure 4 The left housing 1 is also provided with a rear transmission left bearing hole 107 and a front transmission left bearing hole 109, see Figure 5 The middle housing 2 is also provided with a front transmission right bearing hole 201 and a rear transmission right bearing hole 202; The front transmission left bearing hole 109 and the front transmission right bearing hole 201 are both connected to the front transmission mounting cavity, and the front transmission mounting cavity, the front transmission left bearing hole 109 and the front transmission right bearing hole 201 are used to mount the front transmission; The rear transmission left bearing hole 107 and the rear transmission right bearing hole 202 are both connected to the rear transmission mounting cavity, and the rear transmission left bearing hole 107, the rear transmission mounting cavity and the rear transmission right bearing hole 202 are used to mount the rear transmission; See also Figure 4 , the front transmission left bearing hole 109 and the rear transmission left bearing hole 107 are located on both sides of the shaft hole inside the left shaft tube structure 101; See also Figure 4 The front transmission right bearing hole 201 and the rear transmission right bearing hole 202 are located on both sides of the shaft tube connecting shaft hole.

[0033] Preferably, see Figure 3 The left housing 1 is also provided with a bearing cover interface 104, a control assembly interface 105 and a filter interface 108, and the filter interface 108 is located between the left housing 1 and the middle housing 2; The bearing cover interface 104 is used to install the transmission bearing cover; The control assembly interface 105 is used to install the electric control unit; The filter interface 108 is used to install a transmission oil filter.

[0034] Preferably, see Figure 7 The right housing 3 is also provided with a right brake bracket 306 , and the right brake bracket 306 is located between the right suspension interface 304 and the right axle tube structure 307 , and the right brake bracket 306 is used to install the right brake 9 .

[0035] Preferably, see Figure 7 The right housing 3 is also provided with a front motor bearing hole 301 and a rear motor bearing hole 302, and the middle housing 2 is also provided with a front motor cavity 210 and a rear motor cavity 211; The front motor cavity 210 and the right housing 3 together form a front motor installation cavity, the front motor bearing hole 301 is connected to the front motor installation cavity, and the front motor bearing hole 301 and the front motor installation cavity are used to install the front motor; The rear motor cavity 211 and the right housing 3 together form a rear motor installation cavity, the rear motor bearing hole 302 is connected to the rear motor installation cavity, and the rear motor bearing hole 302 and the rear motor installation cavity are used to install the rear motor; See also Figure 7 , the front motor bearing hole 301 and the rear motor bearing hole 302 are located on both sides of the shaft hole inside the right shaft tube structure 307; The front motor cavity 210 and the rear motor cavity 211 are located on both sides of the shaft tube connecting shaft hole.

[0036] Preferably, see Figure 3 The left housing 1 is also provided with an X-push left bracket interface 106, and the X-push left bracket interface 106 is located above the left housing 1, see Figure 7 The right shell 3 is also provided with an X-push right bracket interface 303, and the X-push right bracket interface 303 is located above the right shell 3. The X-push left bracket interface 106 and the X-push right bracket interface 303 are both used to connect with the entire vehicle through the X-push bracket.

[0037] Preferably, see Figure 5 and Figure 6 The middle shell 2 is provided with an electronic oil pump interface 203 and a heat exchange island 206, and an oil passage is opened in the middle shell 2, and the electronic oil pump interface 203 is connected to the heat exchange island 206 through the oil passage; See also Figure 5 and Figure 6 A V-push bracket interface 207 is provided on the middle shell 2, and the V-push bracket interface 207 is used to connect the V-push bracket.

[0038] Preferably, see Figure 8 The right housing 3 is also provided with a differential lock switch interface 308, see Figure 6 A differential lock operating cavity 209 is opened inside the middle shell 2, and the differential lock operating cavity 209 and the right shell 3 together form a differential lock installation cavity. The differential lock switch interface 308 is connected to the differential lock installation cavity, and the differential lock installation cavity is located between the front motor installation cavity and the rear motor installation cavity. The differential lock operating cavity 209 is located at the top of the middle shell 2.

[0039] Preferably, see Figure 1The left shaft tube structure 101 is sleeved with a left wheel hub 4, a bearing is provided between the left wheel hub 4 and the left shaft tube structure 101, a left half shaft 6 is penetrated through the shaft hole inside the left shaft tube structure 101, and the left half shaft 6 is connected to the left wheel hub 4; The right shaft tube structure 307 is sleeved with a right wheel hub 8 , a bearing is provided between the right wheel hub 8 and the right shaft tube structure 307 , a right half shaft 7 is passed through the shaft hole inside the right shaft tube structure 307 , and the right half shaft 7 is connected to the right wheel hub 8 .

[0040] In another embodiment of the present invention, see Figures 1 to 8 This embodiment provides a segmented electric drive axle structure, including a left wheel end assembly, a right wheel end assembly, a transmission and a motor integrated assembly.

[0041] The left wheel end assembly includes a left housing 1, a left wheel hub 4, a left brake 5, a left half shaft 6, etc. The left side of the left housing 1 has a left shaft tube structure 101 consistent with the traditional bridge housing shaft tube structure, which plays the role of supporting the wheel hub bearing of the left wheel hub 4. A left brake bracket 102 is provided in the middle to fix the left brake 5. The right side of the left housing 1 is provided with a left suspension interface 103 and an X-push left bracket interface 106. The left suspension interface 103 is connected to the whole vehicle through the suspension bracket, and the X-push left bracket interface 106 is connected to the whole vehicle through the X-push bracket. The right inner side of the left housing 1 integrates the front transmission and the rear transmission end cover. The left housing flange surface 110 of the left housing 1 is connected to the middle housing 2 through bolts. The left wheel hub 4 is supported on the left shaft tube structure 101 through the wheel hub bearing and is connected to the tire to realize the whole vehicle drive. The left brake 5 is supported by the left housing 1 and connected to the whole vehicle air source, which is used to generate a braking torque to slow down or stop the vehicle when braking is required. The left half shaft 6 is connected to the main reducer and the left wheel hub 4, and the left half shaft 6 is used to transmit power from the main reducer to the wheel end.

[0042] The right wheel end assembly includes a right housing 3, a right wheel hub 8, a right brake 9, a right half shaft 7, etc. The right side of the right housing 3 has a right shaft tube structure 307 that is consistent with the traditional bridge housing shaft tube structure, which plays the role of supporting the wheel hub bearing of the right wheel hub 8. A right brake bracket 306 is provided in the middle to fix the right brake 9. The left side of the right housing 3 is provided with a right suspension interface 304 and an X-push right bracket interface 303. The right suspension interface 304 is connected to the whole vehicle through the suspension bracket, and the X-push right bracket interface 303 is connected to the whole vehicle through the X-push bracket. The left side of the right housing 3 integrates the front motor end cover and the rear motor end cover. The right housing flange surface 305 of the right housing 3 is connected to the middle housing 2 through bolts. The right wheel hub 8 is supported on the right housing 3 through the wheel hub bearing, and the right wheel hub 8 is connected to the tire to realize the driving of the whole vehicle. The right brake 9 is supported by the right housing 3 and connected to the whole vehicle air source, which is used to generate a braking torque to slow down or stop the vehicle when braking is required. The right half shaft 7 is connected to the main reducer and the right wheel hub 8, and the right half shaft 7 is used to transmit power from the main reducer to the wheel end.

[0043] The transmission and motor integrated assembly includes a middle housing 2, a front motor, a rear motor, a front transmission and a rear transmission; the middle housing 2 is an integrated housing that integrates the housing of the front motor, the housing of the rear motor, the housing of the front transmission and the housing of the rear transmission; the left side of the middle housing 2 is connected to the left housing 1 to form a closed cavity of the front transmission and the rear transmission; the right side of the middle housing 2 is connected to the right housing 3 to form a closed cavity of the front motor and the rear motor; a V-push bracket interface 207 is provided on the upper side of the middle housing 2, and the V-push bracket interface 207 is connected to the V-push bracket. The front motor and the rear motor are respectively embedded in the front motor cavity 210 and the rear motor cavity 211 on the middle housing 2; the right side bearing of the front motor is arranged in the front motor bearing hole 301 on the right housing 3; and the right side bearing of the rear motor is arranged in the rear motor bearing hole 302 on the right housing 3. The front motor high-voltage plug connector interface 208 and the rear motor high-voltage plug connector interface 205 are provided on the front and rear sides of the middle housing 2. The front motor high-voltage plug connector interface 208 and the rear motor high-voltage plug connector interface 205 are used to connect high-voltage electric plug connectors to input electricity into the motor to provide a power source for the electric drive axle. The shaft of the front transmission is installed on the front transmission left bearing hole 109 in the left housing 1 and the front transmission right bearing hole 201 in the middle housing 2, and the shaft of the rear transmission is installed on the rear transmission left bearing hole 107 in the left housing 1 and the rear transmission right bearing hole 202 in the middle housing 2, so as to support the transmission shaft and gears and transmit the motor speed and torque to the main reducer.

[0044] Furthermore, in order to make the electric drive axle operate efficiently under various working conditions, an operating device is required to change the transmission gear. This effect depends on an efficient electric operating unit supported by the operating assembly interface 105 in the left housing 1.

[0045] Further efficient operation of the electric drive axle requires a powerful lubrication and cooling device. The electronic oil pump interface 203 in the housing 2 of the present invention is matched with a highly efficient electronic oil pump. At the same time, an oil channel is opened in the middle housing 2, and the heat exchange island 206 is connected to the heat exchanger. The electronic oil pump cooperates with the oil channel in the middle housing 2 to transport the oil to the front and rear motor cooling points and the front and rear transmission lubrication points, and then to the heat exchange island 206. Through the heat exchange island 206, it is transported to the heat exchanger for unified heat exchange and then returns to the bottom of the housing. Ensure that the electric drive axle has sufficient cooling of the motor and sufficient lubrication of the transmission in various working conditions.

[0046] In order to further improve the ability of the electric drive axle to get out of trouble, a differential lock operating unit is installed in the differential lock operating cavity 209. The differential lock operating unit can be used to lock the differential lock, thereby improving the ability of the entire vehicle to get out of trouble. At the same time, the differential lock switch interface 308 cooperates with the differential lock switch to indicate the differential lock state to prevent danger caused by driver's misoperation.

[0047] The bridge housing of the present invention adopts a three-stage design, which is different from the traditional design in which the transmission housing, motor housing and bridge housing are independent of each other. The present invention reconstructs the structure and highly integrates the nine large housings of the bridge housing, front transmission housing, front transmission rear cover, front motor housing, front motor end cover, rear transmission housing, rear transmission rear cover, rear motor housing and rear motor end cover into three housings of left housing, middle housing and right housing, which greatly improves the integration degree; a universal suspension interface is set on the housing to match different supports, thereby meeting the matching requirements of various models; The present invention sets a heat exchange island structure, and the front and rear transmissions and the front and rear motor oil circuits can match a single large-size heat exchanger through the heat exchange island, which is beneficial to reducing the number of heat exchangers and the length of water pipes, and can ensure that the overall appearance of the electric drive bridge is more regular and beautiful; The present invention is provided with a differential lock operating cavity 209, and the differential lock operating housing is integrated on the housing and placed on the upper side of the housing, eliminating the differential lock housing, reducing the joint surface, which is beneficial to reducing the risk of oil leakage from the drive axle, and is convenient for the layout of the entire vehicle to avoid interference between the brake system parts and the differential lock.

[0048] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A segmented electric drive axle housing, characterized in that: include: A left shell (1), a middle shell (2) and a right shell (3), wherein the left shell (1) is connected to the right shell (3) via the middle shell (2); The left housing (1) is provided with a left axle tube structure (101) and a left suspension interface (103), and a front transmission mounting cavity and a rear transmission mounting cavity are formed between the left housing (1) and the middle housing (2); The right housing (3) is provided with a right suspension interface (304) and a right axle tube structure (307), and a front motor installation cavity and a rear motor installation cavity are formed between the right housing (3) and the middle housing (2); The middle housing (2) is provided with a rear motor high-voltage plug connector interface (205), a front motor high-voltage plug connector interface (208) and a shaft tube connecting shaft hole, and the shaft hole inside the left shaft tube structure (101), the shaft hole inside the right shaft tube structure (307) and the shaft tube connecting shaft hole are connected.

2. A segmented electric drive axle housing according to claim 1, characterized in that: The left housing (1) is also provided with a left brake bracket (102), the left brake bracket (102) being located between the left axle tube structure (101) and the left suspension interface (103), and the left brake bracket (102) being used for installing a left brake (5).

3. The segmented electric drive axle housing according to claim 1, characterized in that: The left housing (1) is also provided with a rear transmission left bearing hole (107) and a front transmission left bearing hole (109), and the middle housing (2) is also provided with a front transmission right bearing hole (201) and a rear transmission right bearing hole (202); The front transmission left bearing hole (109) and the front transmission right bearing hole (201) are both in communication with the front transmission mounting cavity; the front transmission mounting cavity, the front transmission left bearing hole (109) and the front transmission right bearing hole (201) are used to mount the front transmission; The rear transmission left bearing hole (107) and the rear transmission right bearing hole (202) are both in communication with the rear transmission mounting cavity; the rear transmission left bearing hole (107), the rear transmission mounting cavity and the rear transmission right bearing hole (202) are used to mount the rear transmission; The front transmission left bearing hole (109) and the rear transmission left bearing hole (107) are located on both sides of the shaft hole inside the left shaft tube structure (101); The front transmission right bearing hole (201) and the rear transmission right bearing hole (202) are located on both sides of the shaft tube connecting shaft hole.

4. The segmented electric drive axle housing according to claim 1, characterized in that: The left housing (1) is also provided with a bearing cover interface (104), a control assembly interface (105) and a filter interface (108), and the filter interface (108) is located between the left housing (1) and the middle housing (2); The bearing cover interface (104) is used to install the transmission bearing cover; The control assembly interface (105) is used to install an electric control unit; The filter interface (108) is used to install a transmission oil filter.

5. The segmented electric drive axle housing according to claim 1, characterized in that: The right housing (3) is also provided with a right brake bracket (306), the right brake bracket (306) being located between the right suspension interface (304) and the right axle tube structure (307), and the right brake bracket (306) being used for installing the right brake (9).

6. The segmented electric drive axle housing according to claim 1, characterized in that: The right housing (3) is further provided with a front motor bearing hole (301) and a rear motor bearing hole (302), and the middle housing (2) is further provided with a front motor cavity (210) and a rear motor cavity (211); The front motor cavity (210) and the right housing (3) together form a front motor installation cavity, the front motor bearing hole (301) is in communication with the front motor installation cavity, and the front motor bearing hole (301) and the front motor installation cavity are used to install the front motor; The rear motor cavity (211) and the right housing (3) together form a rear motor installation cavity, the rear motor bearing hole (302) is connected to the rear motor installation cavity, and the rear motor bearing hole (302) and the rear motor installation cavity are used to install the rear motor; The front motor bearing hole (301) and the rear motor bearing hole (302) are located on both sides of the shaft hole inside the right shaft tube structure (307); The front motor cavity (210) and the rear motor cavity (211) are located on both sides of the shaft tube connecting shaft hole.

7. The segmented electric drive axle housing according to claim 1, characterized in that: The left shell (1) is also provided with an X-push left bracket interface (106), and the X-push left bracket interface (106) is located above the left shell (1). The right shell (3) is also provided with an X-push right bracket interface (303), and the X-push right bracket interface (303) is located above the right shell (3). The X-push left bracket interface (106) and the X-push right bracket interface (303) are both used to connect to the entire vehicle via the X-push bracket.

8. The segmented electric drive axle housing according to claim 1, characterized in that: An electronic oil pump interface (203) and a heat exchange island (206) are provided on the middle housing (2), an oil channel is provided in the middle housing (2), and the electronic oil pump interface (203) is connected to the heat exchange island (206) through the oil channel; A V-push bracket interface (207) is provided on the middle housing (2), and the V-push bracket interface (207) is used to connect the V-push bracket.

9. The segmented electric drive axle housing according to claim 1, characterized in that: The right housing (3) is also provided with a differential lock switch interface (308); a differential lock operating cavity (209) is provided inside the middle housing (2); the differential lock operating cavity (209) and the right housing (3) together form a differential lock installation cavity; the differential lock switch interface (308) is communicated with the differential lock installation cavity; the differential lock installation cavity is located between the front motor installation cavity and the rear motor installation cavity; and the differential lock operating cavity (209) is located at the top of the middle housing (2).

10. The segmented electric drive axle housing according to claim 1, characterized in that: A left wheel hub (4) is sleeved on the left shaft tube structure (101), a bearing is provided between the left wheel hub (4) and the left shaft tube structure (101), a left half shaft (6) is passed through the shaft hole inside the left shaft tube structure (101), and the left half shaft (6) is connected to the left wheel hub (4); A right wheel hub (8) is sleeved on the right shaft tube structure (307), a bearing is provided between the right wheel hub (8) and the right shaft tube structure (307), a right half shaft (7) is passed through an shaft hole inside the right shaft tube structure (307), and the right half shaft (7) is connected to the right wheel hub (8).

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