An integrated electric drive axle power connection support device

Abstract

The utility model discloses an integrated integral electric drive axle power connection support device, which is used to connect the axle and the motor together, wherein a swing frame is installed on the axle, and the power input shaft of the axle is installed through the swing frame, and a motor middle cover is arranged between the motor and the axle; a cavity structure is formed between the swing frame and the motor middle cover, and the cavity structure is used to accommodate an integrated coupling, and the integrated coupling comprises an axle end flange hub, a motor end flange hub and an elastomer, and the axle end flange hub and the motor end flange hub are fixed by nuts and washers, the axle end flange hub is connected to the input end of the axle, and the motor end flange hub is connected to the power output shaft of the motor. In the utility model, the overall structure of the support device is simple, maintenance is convenient, and the load-bearing capacity is large, and the input shaft of the axle and the output shaft of the motor can undergo relative displacement, so that the motor installation requirements are reduced and continuous long-term operation can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive axles, and in particular to an integrated electric drive axle power connection support device. Background Art

[0002] With the advent of the domestic new energy and carbon reduction wave, domestic fuel-powered engineering vehicles, especially TBH off-road forklifts, mining trucks, heavy trucks, loaders and other high-carbon emission vehicles are all turning to electrification. Among them, the axle, as one of the important components in the vehicle transmission system, has gradually emerged with the power layout of the motor-driven axle. The electric drive axle, with its special structure, does not require the intervention of the gearbox during the transmission process of pure electric vehicles, reducing the loss in the kinetic energy transfer process. The traditional electric drive axle connects the motor to the input end of the axle through the drive shaft to transmit power. In engineering machinery and material transportation vehicles, the traditional method of using a drive shaft not only occupies a large chassis space, but also generates additional noise due to the unstable low-speed output speed of the motor, reducing the driving comfort of the vehicle.

[0003] In addition, such vehicles are often rear-axle driven, with the axle and the frame being rigidly connected via a swing frame and occupying space on the vehicle chassis. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an integrated electric drive axle power connection support device, which is used to connect the axle and the motor together, the axle is installed with a swing frame, the power input shaft of the axle is installed through the swing frame, and a motor middle cover is provided between the motor and the axle;

[0005] A cavity structure is formed between the swing frame and the motor middle cover, and the cavity structure is used to accommodate an integrated coupling. The integrated coupling includes an axle end flange hub, a motor end flange hub and an elastomer. The axle end flange hub and the motor end flange hub are fixed by nuts and washers.

[0006] Preferably, the axle-end flange hub is connected to the power input shaft of the axle.

[0007] Preferably, the motor-end flange hub is connected to the power output shaft of the motor.

[0008] Preferably, grooves are provided at the sides of the axle-end flange hub and the motor-end flange hub that are close to each other, and the grooves are used to place the elastic body.

[0009] Preferably, the elastomer is a six-petal elastomer.

[0010] Preferably, one end of the motor middle cover is fixed to the motor by a second bolt, and the other end of the motor middle cover is fixedly connected to the swing frame by a first bolt.

[0011] Preferably: the swing frame is provided with an oil cup, through which grease is added into the cavity structure for lubrication.

[0012] Preferably, the swing frame is provided with a mounting hole matched with the motor middle cover, so as to connect the swing frame to the motor middle cover.

[0013] Preferably, the axle-end flange hub is provided with a spline groove extending in the axial direction, and the axle-end flange hub and the input shaft of the axle are connected via a spline.

[0014] Preferably, the motor end flange hub is provided with a spline groove extending along the axis, and the motor end flange hub and the output shaft of the motor are connected via a spline.

[0015] Technical effects and advantages of the utility model:

[0016] In the utility model, the overall structure of the support device is simple, maintenance is convenient, and the load-bearing capacity is large. The input shaft of the axle and the output shaft of the motor can be relatively displaced, so that the motor installation requirements are reduced, and continuous long-term operation can be achieved, which can save vehicle chassis space and leave more space for energy storage batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the integrated electric drive axle power connection support device provided in an embodiment of the present application.

[0018] In the figure: 1. swing frame fixing pin; 2. swing frame; 3. first bolt; 4. motor middle cover; 5. motor; 6. axle; 7. oil cup; 8. axle end flange hub; 9. elastomer; 10. motor end flange hub; 11. second bolt. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0020] See also Figure 1 In this embodiment, an integrated electric drive axle power connection support device is provided. First, the flange of the axle 6 is removed and replaced with an axle-end flange hub 8. The axle-end flange hub 8 is connected to the power input shaft of the axle 6, and the output shaft of the motor 5 is installed with the motor-end flange hub 10. The axle-end flange hub 8 and the motor-end flange hub 10 are fixed by nuts and washers to connect the axle 6 and the motor 5 together.

[0021] In this embodiment, grooves are provided at the side ends of the axle-end flange hub 8 and the motor-end flange hub 10 that are close to each other. The grooves are used to place the elastomer 9. The elastomer 9 is a six-petal elastomer. During installation, the elastomer 9 is placed in the two grooves, and the axle-end flange hub 8 and the motor-end flange hub 10 are fixed by nuts and washers, and power is transmitted through an integrated coupling.

[0022] In this embodiment, a motor middle cover 4 is arranged between the motor 5 and the axle 6, one end of the motor middle cover 4 is fixed to the motor 5 by a second bolt 11, and the other end of the motor middle cover 4 is fixedly connected to the swing frame 2 by a first bolt 3, and the swing frame 2 is installed on the axle 6. When the swing frame 2 is loaded on the vehicle, it is positioned and fixed by a swing frame fixing pin 1. A cavity structure is formed between the swing frame 2 and the motor middle cover 4 for accommodating an integrated coupling, which protects the integrated coupling, and has a simple and reliable structure, occupies a small space, is easy to maintain, and has strong practicality.

[0023] In this embodiment, the integrated coupling includes an axle-end flange hub 8, a motor-end flange hub 10 and an elastomer 9. The elastomer 9 is used in the middle and has good shock absorption, buffering and electrical insulation properties.

[0024] Furthermore, the swing frame 2 is provided with an oil cup 7, and grease is added into the cavity structure formed by the swing frame 2 and the motor middle cover 4 through the oil cup 7 for lubrication.

[0025] Furthermore, compared with the traditional swing frame, the swing frame 2 is provided with a mounting hole adapted to the motor middle cover 4 and can be directly connected to the motor middle cover 4. The thickness of the swing frame 2 is also increased compared with the traditional swing frame and can bear greater force.

[0026] Furthermore, the power input shaft of the axle 6 is installed through the swing frame 2, which can absorb severe vibrations during mechanical action and ensure smooth operation of the vehicle.

[0027] In this embodiment, in order to facilitate the connection between the axle end flange hub 8 and the input shaft of the axle 6, the axle end flange hub 8 is provided with a spline groove extending axially, and the axle end flange hub 8 and the input shaft of the axle 6 are connected via splines.

[0028] In order to facilitate the connection between the motor end flange hub 10 and the output shaft of the motor 5 , the motor end flange hub 10 is provided with a spline groove extending along the axis, and the motor end flange hub 10 and the output shaft of the motor 5 are connected via a spline.

[0029] The working principle of the utility model is:

[0030] In the device, the motor 5 is fixed to the front swing frame 2 through the motor middle cover 4. Since the swing frame 2 is directly fixed to the frame 6, it is ensured that the motor 5 will not vibrate with the axle 6, which protects the motor 5 and greatly shortens the distance between the motor 5 and the axle 6. The power output shaft of the motor 5 and the power input shaft of the axle 6 are connected by an integrated coupling. The elastomer in the middle of the integrated coupling uses a universal six-petal elastomer. The flange hubs at both ends of the coupling integrate the splines of the axle 6 and the motor 5 on the flange hubs at both ends, and are automatically centered through the spline grooves, which saves space and simplifies the processing technology. A reasonable gap is reserved between the middle elastomer and the flange hubs on both sides, which can effectively avoid interference between the power input shaft of the axle and other parts when the axle moves forward or backward.

[0031] An intermediate connecting device is adopted, and one end of the motor cover 4 is connected to the motor 5 on the outside, and the other end is connected to the axle 6 through the swing frame 2, which is convenient for disassembly and maintenance. When the axle 6 is tilted, the swing frame 2 can make the whole transmission system run smoothly. An integrated coupling is adopted inside, which is directly connected to the motor 5 and the axle 6 through splines and fixed with bolts. The flange hub on the coupling side can be modified in shape and customized in splines as required. An elastomer structure is adopted in the middle, which has good vibration reduction, buffering and electrical insulation properties. The whole device has a simple overall structure, is easy to repair, maintenance-free, has a large load-bearing capacity, and the two shafts can undergo relative displacement, which reduces the requirements for motor installation and can operate continuously for a long time, can save vehicle chassis space, and leave more space for energy storage batteries.

[0032] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. An integrated electric drive axle power connection support device, used to connect a vehicle axle (6) and a motor (5) together, characterized in that: The axle (6) is mounted with a swing frame (2), the power input shaft of the axle (6) is mounted via the swing frame (2), and a motor middle cover (4) is arranged between the motor (5) and the axle (6); A cavity structure is formed between the swing frame (2) and the motor middle cover (4), and the cavity structure is used to accommodate an integrated coupling. The integrated coupling comprises an axle end flange hub (8), a motor end flange hub (10) and an elastic body (9), and the axle end flange hub (8) and the motor end flange hub (10) are fixed by nuts and washers.

2. The integrated electric drive axle power connection support device according to claim 1, characterized in that: The axle end flange hub (8) is connected to the power input shaft of the axle (6).

3. The integrated electric drive axle power connection support device according to claim 2, characterized in that: The motor end flange hub (10) is connected to the power output shaft of the motor (5).

4. The integrated electric drive axle power connection support device according to claim 3, characterized in that: The side ends of the axle end flange hub (8) and the motor end flange hub (10) that are close to each other are both provided with grooves, and the grooves are used to place the elastic body (9).

5. The integrated electric drive axle power connection support device according to claim 4, characterized in that: The elastic body (9) is a six-petal elastic body.

6. The integrated electric drive axle power connection support device according to claim 1, characterized in that: One end of the motor middle cover (4) is fixed to the motor (5) via a second bolt (11), and the other end of the motor middle cover (4) is fixedly connected to the swing frame (2) via a first bolt (3).

7. The integrated electric drive axle power connection support device according to claim 1, characterized in that: The swing frame (2) is provided with a mounting hole matched with the motor middle cover (4), and is used for connecting the swing frame (2) to the motor middle cover (4).

8. The integrated electric drive axle power connection support device according to claim 1, characterized in that: The axle end flange hub (8) is provided with a spline groove extending in the axial direction, and the axle end flange hub (8) and the input shaft of the axle (6) are connected via a spline.

9. The integrated electric drive axle power connection support device according to claim 1, characterized in that: The motor end flange hub (10) is provided with a spline groove extending along the axis, and the motor end flange hub (10) and the output shaft of the motor (5) are connected via a spline.

10. The integrated electric drive axle power connection support device according to claim 1, characterized in that: The swing frame (2) is provided with an oil cup (7), and grease is added into the cavity structure through the oil cup (7) for lubrication.

Images