Electric drive system structure of commercial vehicle

Abstract

An electric drive system structure of a commercial vehicle comprises a motor, a motor controller and a speed reducing mechanism, the motor and the speed reducing mechanism are arranged in a power system shell of an integrated structure, the power system shell comprises a motor mounting part, a speed reducing mechanism mounting part and an axle housing, and the speed reducing mechanism mounting part is located on one axial side of the motor mounting part; the axle housing is located on the radial sides of the speed reducing mechanism installation part and the motor installation part, a differential mechanism assembly cavity communicated with an inner cavity of the speed reducing mechanism installation part is formed in the middle of the axle housing, half shaft via holes are formed in the left side and the right side of the differential mechanism assembly cavity, and the other axial side of the motor installation part is connected with a motor controller shell through bolts. A motor controller is arranged in the motor controller shell and connected with a motor, the motor is arranged in the motor mounting part, a speed reducing mechanism is arranged in the speed reducing mechanism mounting part and connected with the motor, a differential mechanism is arranged in the differential mechanism assembling cavity of the axle shell and connected with the speed reducing mechanism, and a high-voltage wire holder is arranged in the end, adjacent to the motor controller shell, of the motor mounting part.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electrical engineering, concretely relates to a commercial vehicle electric drive system structure. BACKGROUND

[0002] Light, micro commercial vehicle adopts the trend of electric drive axle increasingly obvious, commercial vehicle electric drive axle integration degree is also higher and higher, the motor, motor controller, speed reducer and bridge constitute the multi-in-one has high efficiency, small size etc.

[0003] For example, the integrated motor controller disclosed by CN118890835A includes an electric drive axle assembly, the mounting end of the electric drive axle assembly is connected with an integrally formed controller housing, the controller housing is provided with a one-side opening mounting cavity, the opening side of the mounting cavity faces the electric drive axle assembly, the mounting cavity is provided with a heat dissipation assembly, and the heat dissipation assembly includes a heat dissipation channel formed in the controller housing. But this kind of integrated motor controller has a separate heat dissipation channel in the controller housing and the electric drive axle assembly, and the external cooling water pipeline is complex and inconvenient to maintain. SUMMARY

[0004] The utility model aims at the corresponding insufficient of prior art, provides a kind of commercial vehicle electric drive system structure, using motor and motor controller split type integrated electric drive system, solve motor electric control two-in-one volume, pipeline, maintenance disassembly difficult and so on.

[0005] The utility model aims at the following scheme realization:

[0006] The application discloses a commercial vehicle electric drive system structure, which comprises a motor, a motor controller and a speed reduction mechanism, wherein the motor and the speed reduction mechanism are arranged in a power system shell of an integrated structure, the power system shell comprises a motor mounting portion, a speed reduction mechanism mounting portion and a bridge shell, the speed reduction mechanism mounting portion is located at one axial side of the motor mounting portion, the bridge shell is located at the radial side of the speed reduction mechanism mounting portion and the motor mounting portion, the middle part of the bridge shell is provided with a differential assembly cavity which is communicated with the inner cavity of the speed reduction mechanism mounting portion, the left and right sides of the differential assembly cavity are half shaft through holes, the other axial side of the motor mounting portion is connected with a motor controller shell through bolts, the motor controller shell is arranged with a motor controller which is connected with the motor, the motor is arranged in the motor mounting portion, the speed reduction mechanism is arranged in the speed reduction mechanism mounting portion and connected with the motor, the differential is arranged in the differential assembly cavity of the bridge shell and connected with the speed reduction mechanism, and a high-voltage wiring seat is arranged in the end of the motor mounting portion which is adjacent to the motor controller shell.

[0007] Preferably, the power system shell is provided with a motor cooling water channel which surrounds the motor mounting portion, the water outlet of the motor cooling water channel is arranged on the outer wall of the power system shell, the first interface of the motor cooling water channel is arranged on the joint surface of the power system shell, the motor controller shell is provided with an electric control cooling water channel, the second interface of the electric control cooling water channel is arranged on the joint surface of the motor controller shell and corresponds to the first interface, the third interface of the electric control cooling water channel is arranged on the joint surface of the motor controller shell and is communicated with the second interface, the fourth interface is arranged on the joint surface of the power system shell and corresponds to the third interface, the water inlet is arranged on the outer wall of the power system shell and is communicated with the fourth interface, and the motor cooling water channel and the electric control cooling water channel form a circulating cooling water channel after the joint.

[0008] Preferably, the high-voltage wiring seat is arranged in the joint surface of the power system shell, and the water inlet is arranged beside the high-voltage wiring seat.

[0009] Preferably, the first interface and the fourth interface are counterbores arranged on the joint surface, and the counterbores are provided with sealing rings.

[0010] Preferably, the motor cooling water channel which surrounds the motor mounting portion is in a multi-turn spiral surrounding shape, and the electric control cooling water channel on the motor controller shell is in a rectangular reciprocating bending shape.

[0011] Preferably, the cross sections of the motor cooling water channel and the electric control cooling water channel are all rectangular structures with a size of 5mm*20mm.

[0012] Preferably, the power system shell of the integrated structure is integrally pressure-cast.

[0013] The application has the following beneficial effects:

[0014] The water inlet, the fourth interface communicated with the water inlet, the motor cooling water channel and the electric control cooling water channel of the motor controller shell form a circulating cooling water channel after the power system shell and the motor controller shell are combined, which can reduce the number of external cooling water pipes, reduce the assembly process and assembly time, and reduce the production cost; the connection points of the external pipes are prone to leakage, and reducing the number of pipes can reduce the number of connection points, thereby reducing the risk of cooling medium leakage, reducing the maintenance cost and maintenance workload, and improving the maintainability and reliability of the equipment; reducing the number of external pipes helps to optimize the distribution of cooling water flow, avoids uneven flow in each cooling branch caused by too many pipes, and improves the overall cooling efficiency.

[0015] The motor cooling water channel arranged around the motor mounting portion of the power system shell is in a multi-turn spiral surrounding shape, and the electric control cooling water channel of the motor controller shell is in a rectangular reciprocating bending shape, which can better reduce the temperature of the motor mounting portion of the power system shell and the interior of the motor controller shell. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an overall structure schematic diagram of the electric drive system of the utility model;

[0017] Figure 2 It is an overall structure side view of the electric drive system of the utility model;

[0018] Figure 3 It is a connection structure schematic diagram of the electric drive system of the utility model;

[0019] Figure 4 It is an electric drive system structure schematic diagram of the utility model;

[0020] Figure 5 It is Figure 4 Another direction schematic diagram;

[0021] Figure 6 It is a motor controller shell structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0022] As Figures 1 to 6As shown, a commercial vehicle electric drive system structure includes a motor, a motor controller, a speed reduction mechanism, the motor and the speed reduction mechanism are arranged in a one-piece die-cast power system housing 10, the power system housing 10 includes a motor mounting portion 100, a speed reduction mechanism mounting portion 300, an axle housing 400, the speed reduction mechanism mounting portion 300 is located on one axial side of the motor mounting portion 100, the axle housing 400 is located on the radial side of the speed reduction mechanism mounting portion 300 and the motor mounting portion 100, the middle part of the axle housing 400 is provided with a differential assembly cavity 411 communicating with the inner cavity of the speed reduction mechanism mounting portion 300, the left and right sides of the differential assembly cavity 411 are half shaft through holes 412, the other axial side of the motor mounting portion 100 is connected with the motor controller housing 200 through bolts, the motor controller is arranged in the motor controller housing 200 and connected with the motor, the motor is arranged in the motor mounting portion 100, the speed reduction mechanism is arranged in the speed reduction mechanism mounting portion 300 and connected with the motor, the differential is arranged in the differential assembly cavity 411 of the axle housing 400 and connected with the speed reduction mechanism, the motor end cover is arranged in the motor mounting portion 100 adjacent to the one end of the motor controller housing 200 of the power system housing 10, the motor end cover is fixed on the power system housing 10 through bolts, a high-voltage terminal block 131 is installed and fixed on the motor end cover through bolts, the high-voltage terminal block 131 is connected with the motor through three-phase lines, and the high-voltage terminal block 131 is connected with the motor controller through high-voltage lines, the motor cooling water channel is arranged around the motor mounting portion 100 of the power system housing 10, the water outlet 122 of the motor cooling water channel is arranged on the outer wall of the power system housing 10, the first interface 121 of the motor cooling water channel is arranged on the joint surface 141 of the power system housing 10, the electric control cooling water channel is arranged on the motor controller housing 200, the second interface 212 of the electric control cooling water channel is arranged on the joint surface of the motor controller housing 200 and corresponds to the first interface 121, the third interface 211 of the electric control cooling water channel is arranged on the joint surface of the motor controller housing 200 and communicates with the second interface 212, the fourth interface 112 corresponding to the third interface 211 is arranged on the joint surface of the power system housing 10, the water inlet 111 communicating with the fourth interface 112 is arranged on the outer wall of the power system housing 10, the motor cooling water channel and the motor cooling water channel form a circulating cooling water channel after jointing, the high-voltage terminal block 131 is arranged in the joint surface 141 of the power system housing 10, the water inlet 111 is arranged beside the high-voltage terminal block 131, the first interface 121 and the fourth interface 112 are counterbores arranged on the joint surface 141, a sealing ring is arranged in the counterbores, the sealing ring partially protrudes from the joint surface 141, the motor cooling water channel around the motor mounting portion 100 is in the shape of multiple spiral rings, the electric control cooling water channel on the motor controller housing 200 is in the shape of rectangular reciprocating bending, the cross sections of the motor cooling water channel and the electric control cooling water channel are both rectangular structures with the size of 5mm*20mm.

[0023] The above merely illustrates the preferred embodiments of the present application, and is not intended to limit the present application. Any modification made by those skilled in the art without departing from the spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A commercial vehicle electric drive system structure, comprising an electric motor, a motor controller, a speed reduction mechanism, characterized in that: The motor and the speed reduction mechanism are arranged in a power system shell (10) of an integrated structure, the power system shell (10) comprises a motor mounting portion (100), a speed reduction mechanism mounting portion (300), and an axle housing (400), the speed reduction mechanism mounting portion (300) is located at one axial side of the motor mounting portion (100), the axle housing (400) is located at the radial side of the speed reduction mechanism mounting portion (300) and the motor mounting portion (100), the middle part of the axle housing (400) is provided with a differential assembly cavity (411), the differential assembly cavity (411) is communicated with the inner cavity of the speed reduction mechanism mounting portion (300), the left and right sides of the differential assembly cavity (411) are half shaft through holes (412), the other axial side of the motor mounting portion (100) is connected with a motor controller shell (200) through bolts, the motor controller shell (200) is provided with a motor controller connected with the motor, the motor mounting portion (100) is provided with the motor, the speed reduction mechanism mounting portion (300) is provided with the speed reduction mechanism connected with the motor, the differential assembly cavity (411) of the axle housing (400) is provided with a differential connected with the speed reduction mechanism, and the end of the motor mounting portion (100) adjacent to the motor controller shell (200) is provided with a high-voltage terminal block (131).

2. The electric drive system structure of the commercial vehicle according to claim 1, characterized in that: The power system shell (10) is provided with a motor cooling water channel surrounding the motor mounting portion (100), the water outlet (122) of the motor cooling water channel is arranged on the outer wall of the power system shell (10), the joint surface (141) of the power system shell (10) is provided with a first interface (121) of the motor cooling water channel, the motor controller shell (200) is provided with an electric control cooling water channel, the joint surface of the motor controller shell (200) is provided with a second interface (212) of the electric control cooling water channel corresponding to the first interface (121), the joint surface of the motor controller shell (200) is provided with a third interface (211) of the electric control cooling water channel communicated with the second interface (212), the joint surface of the power system shell (10) is provided with a fourth interface (112) corresponding to the third interface (211), the outer wall of the power system shell (10) is provided with a water inlet (111) communicated with the fourth interface (112), and the motor cooling water channel and the motor cooling water channel form a circulating cooling water channel after the joint.

3. The electric drive system structure of the commercial vehicle according to claim 2, characterized in that: The joint surface (141) of the power system shell (10) is provided with a high-voltage terminal block (131), and the water inlet (111) is arranged beside the high-voltage terminal block (131).

4. The electric drive system structure of the commercial vehicle according to claim 2, characterized in that: The first interface (121) and the fourth interface (112) are counterbores arranged on the joint surface (141), and the counterbores are provided with sealing rings.

5. The electric drive system structure of a commercial vehicle according to claim 2, characterized in that: The motor cooling water channel surrounding the motor mounting portion (100) is in the shape of a spiral ring with multiple turns, and the electric control cooling water channel on the motor controller shell (200) is in the shape of a rectangular reciprocating bend.

6. The electric drive system structure of a commercial vehicle according to claim 2, characterized in that: The cross sections of the motor cooling water channel and the electric control cooling water channel are all rectangular structures with the size of 5mm*20mm.

7. The electric drive system structure of a commercial vehicle according to claim 1, characterized in that: The power system shell (10) of the integrated structure is integrally pressure-cast.

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