CN210309799U

CN210309799U - Integrated wheel limit motor assembly of independent suspension

Info

Publication number: CN210309799U
Application number: CN201921106806.3U
Authority: CN
Inventors: 曾洋洋; 胡胜利; 卢金良; 邵庆刚
Original assignee: Dongfeng Dana Axle Co Ltd
Current assignee: Dongfeng Dana Axle Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-04-14
Anticipated expiration: 2029-07-16

Abstract

An independent suspension integrated wheel-side motor assembly is used for automobile manufacturing. The two upper cross arms are symmetrical about the vertical plane of the axis of the hub and are connected with an upper cross arm mounting seat on the upright post through a revolute pair, and the rotation axes are overlapped; the lower cross arm structure is X-shaped, one end of the lower cross arm is connected with a lower cross arm mounting seat on the upright post in two revolute pairs, and the other end of the lower cross arm is connected with the frame by adopting two coaxial revolute pairs; the two C-shaped arms are symmetrical about the vertical plane of the axis of the hub, and the two C-shaped arms are connected with the C-shaped arm mounting holes on the upright post; the motor is provided with an end cover, a flange plate is arranged on the end cover, the motor is fixed in a stepped hole in the upright post, the upright post and the shell of the main speed reducer are of an integrated structure, and the output power of the motor is transmitted to the main speed reducer, then transmitted to the hub reduction gear through the spline shaft and finally transmitted to the hub assembly. The utility model discloses with motor, transmission system, independent suspension, braking system integration, the system is simplified, and power is highly concentrated, can reduce vehicle unsprung mass and wheel dynamic load, improves the vehicle ride comfort.

Description

Integrated wheel limit motor assembly of independent suspension

Technical Field

The utility model relates to an automobile manufacturing technical field specifically is an integrated wheel limit motor assembly of independent suspension.

Background

To meet the market demand of new energy vehicles, more and more vehicle manufacturers are trying to use an electric motor instead of an engine to provide power in the development of new vehicle models. At present, most of pure electric vehicles adopt an integral rigid bridge of a traditional vehicle and a motor externally-hung structure, so that the transmission efficiency of the structure is low, the power loss and the occupied space are large, and the arrangement of batteries is even influenced, so that the driving range of the vehicle is short; on the other hand, because the integral rigid axle is adopted, the left wheel and the right wheel are mutually influenced, and the maneuverability and the comfort of the vehicle are reduced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an independent suspension integrated wheel-side motor assembly which is used for replacing the structure that the traditional rigid bridge is combined with a central motor so as to meet the requirements of comfort, riding convenience, energy conservation and environmental protection of vehicles.

In order to realize the purpose, the utility model comprises a first upper cross arm, a second upper cross arm, a lower cross arm, a first C-shaped arm, a second C-shaped arm, a motor, a main reducer, a wheel-side reducer, an air spring, a shock absorber, a stand column, a flange shaft tube, a brake assembly and a wheel hub assembly; the first upper cross arm and the second upper cross arm are symmetrical about a vertical plane of the axis of the hub and are respectively connected with two upper cross arm mounting seats on the stand column as revolute pairs, and the rotation axes are overlapped; the structure of the lower cross arm is X-shaped, one end of the lower cross arm is connected with two lower cross arm mounting seats on the upright post in two revolute pairs, and the other end of the lower cross arm is connected with the frame by two coaxial revolute pairs; the first C-shaped arm and the second C-shaped arm are symmetrical about a vertical plane of the axis of the hub, and the first C-shaped arm and the second C-shaped arm are connected with a C-shaped arm mounting hole in the upright post through a bolt; the motor is provided with an end cover, a flange plate is arranged on the end cover, the motor is fixed in a stepped hole in the upright post through a flange bolt, the upright post and a shell of the main speed reducer are of an integral structure, the output power of the motor is transmitted to the main speed reducer to be subjected to primary speed reduction, then is transmitted to the hub reduction gear through the spline shaft to be subjected to secondary speed reduction, and finally is transmitted to the hub assembly.

The first upper cross arm and the second upper cross arm are provided with frame mounting interfaces and are connected with the frame to form a revolute pair; the axes of the revolute pair formed by the first upper cross arm, the second upper cross arm and the frame are superposed.

The flange shaft tube is connected with the shell of the main speed reducer through a flange bolt, the inside of the flange shaft tube is of a hollow structure, a spline shaft is arranged inside the flange shaft tube and is simultaneously connected with the output end of the main speed reducer and the input end of the hub reduction gear, a hub assembly is arranged outside the flange shaft tube and can rotate around the flange shaft tube; the input end of the main speed reducer is fixedly connected with the output end of the motor, the output end of the hub speed reducer is fixedly connected with the hub assembly, the main speed reducer is a non-coaxial speed reducer, the hub speed reducer is a coaxial speed reducer, and the axis height of the hub assembly is higher than that of the motor.

The tail ends of the first C-shaped arm and the second C-shaped arm are respectively provided with an air spring and a mounting interface of a shock absorber; the number of the air springs is two, the two air springs are respectively arranged at the secondary tail ends of the first C-shaped arm and the second C-shaped arm and are symmetrical about the vertical plane of the axis of the hub; the number of the shock absorbers is two, the shock absorbers are respectively installed at the tail ends of the first C-shaped arm and the second C-shaped arm, and the shock absorbers are symmetrical about a vertical plane of the axis of the hub.

The brake assembly is fixedly connected to the flange shaft tube, and the brake assembly is matched with a brake disc on the hub assembly to realize the braking function of the vehicle.

Compared with the prior art, the utility model, with disconnected independent suspension, wheel limit motor drive, low floor bridge three's structural advantage combination, travelling comfort, convenience by bus, energy-concerving and environment-protective nature that improve current city bus that can to a great extent. The double-cross arm independent suspension structure is adopted, the problem of large unsprung mass of the integral rigid bridge is well solved, and meanwhile, under the condition of the same spring pitch, the roll angle rigidity of the independent suspension is higher than that of the integral rigid bridge, so that the safety of a vehicle is improved; by adopting the wheel-side motor arrangement scheme, the problems of large space volume, more parts of a transmission system, long transmission chain and the like of the traditional centralized drive are solved; the lower cross arm is designed to be X-shaped, and two coaxial revolute pairs are adopted to be connected with the upright posts, so that the problem of connection strength under large tonnage is solved; the first C-shaped arm and the second C-shaped arm are adopted, so that the problem of spatial arrangement of the double air springs and the double shock absorbers is reasonably solved; the problem of low bearing tonnage of the traditional double-cross arm independent suspension is solved by adopting double air springs and double shock absorbers; the motor, the transmission system, the suspension and the brake system are integrated, so that the space and the weight of the system are reduced, and the comfort and the safety of a vehicle are improved; the main speed reducer adopts a non-coaxial structure, so that the axis of the wheel is higher than that of the motor, the mounting height of the motor is reduced, the floor height of the vehicle is reduced, and the convenience for passengers to ride the vehicle is improved.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a perspective view of the column of fig. 1.

In the figure: 1-a first upper cross arm; 2-a second upper cross arm; 3-a lower cross arm; 4-a first C-arm; 5-a second C-arm; 6, a motor; 7-a main reducer; 8-wheel reduction gear; 9-an air spring; 10-a shock absorber; 11-upright column, 12-flange axle tube; 13-a brake assembly; 14-a hub assembly, 15-an upper cross arm mounting base, 16-a lower cross arm mounting base and 17-a C-shaped arm mounting hole.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 3, the present invention mainly includes a first upper cross arm 1, a second upper cross arm 2, a lower cross arm 3, a first C-shaped arm 4, a second C-shaped arm 5, a motor 6, a main reducer 7, a wheel reducer 8, an air spring 9, a shock absorber 10, a column 11, a flange shaft tube 12, a brake assembly 13 and a hub assembly 14.

The first upper cross arm 1 and the second upper cross arm 2 are respectively connected with two upper cross arm mounting seats 15 on the upright posts 11 through revolute pairs, the revolute axes of the two upper cross arms are overlapped, the first upper cross arm 1 and the second upper cross arm 2 can be rotatablely connected with the vehicle frame, the first upper cross arm 1 and the second upper cross arm 2 are also overlapped with the revolute pair axes of the vehicle frame, and the first upper cross arm 1 and the second upper cross arm 2 are symmetrical about the vertical plane (called plane α for short) of the axis of the hub.

The lower cross arm 3 is in an X shape, one end of the lower cross arm 3 is connected with two lower cross arm mounting seats 16 on the upright post 11 through a revolute pair, the two revolute pairs are coaxial, the other end of the lower cross arm 3 can be connected with the frame through two coaxial revolute pairs, and the connection strength can be improved through the two coaxial revolute pairs.

The motor 6 is provided with an end cover, the end cover is provided with a flange plate, and the motor 6 is fixed in a stepped hole in the upright post 11 through a flange bolt. The upright post 11 and the shell of the main reducer 7 are of an integral structure, the main reducer 7 is used for carrying out primary speed reduction by motor power, the main reducer 7 is a non-coaxial reducer, and the wheel reducer 8 is a coaxial reducer, so that the height difference exists between the axis of a wheel and the central axis of the motor 6, and the height of the floor of the vehicle can be reduced to the maximum extent.

The flange shaft tube 12 is connected with the shell of the main speed reducer 7 through a flange bolt, and the inside of the flange shaft tube 12 is of a hollow structure. The inside installation integral key shaft of flange central siphon 12, the integral key shaft is connected with the output of main reducer 7, the input of hub reduction gear 8 simultaneously. The hub assembly 14 is installed on the flange shaft tube 12, the hub assembly 14 can rotate around the flange shaft tube 12, the hub assembly 14 is fixedly connected with the output end of the hub reduction gear 8, the output power of the motor 6 is subjected to primary speed reduction through the main speed reducer assembly 7, then is transmitted to the hub reduction gear 8 through the spline shaft, is subjected to secondary speed reduction through the hub reduction gear 8, and finally is transmitted to the hub assembly 14.

The first C-shaped arm 4 and the second C-shaped arm 5 are symmetrical about a plane α, the first C-shaped arm 4 and the second C-shaped arm 5 are fastened with a C-shaped arm mounting hole 17 on an upright post 11 through bolts, the tail ends of the first C-shaped arm 4 and the second C-shaped arm 5 are respectively provided with an air spring 9 and a shock absorber 10 mounting seat, the number of the air springs 9 and the number of the shock absorbers 10 are two, the air springs 9 and the shock absorbers 10 are respectively symmetrical about a plane α, the air springs 9 are respectively mounted at the secondary tail ends of the first C-shaped arm 4 and the second C-shaped arm 5, the shock absorbers 10 are respectively mounted at the tail ends of the first C-shaped arm 4 and the second C-shaped arm 5, the air springs 9 mainly serve to bear vertical loads of a vehicle frame, and the shock absorbers 10 mainly serve to absorb dynamic loads of ground.

The brake assembly 13 is installed on the flange shaft tube 12, and the brake assembly 13 is matched with a brake disc on the hub assembly, so that the vehicle braking function is realized.

Claims

1. The utility model provides an integrated round of limit motor assembly of independent suspension which characterized in that: the device comprises a first upper cross arm (1), a second upper cross arm (2), a lower cross arm (3), a first C-shaped arm (4), a second C-shaped arm (5), a motor (6), a main speed reducer (7), a wheel-side speed reducer (8), an air spring (9), a shock absorber (10), an upright post (11), a flange shaft tube (12), a brake assembly (13) and a hub assembly (14); the first upper cross arm (1) and the second upper cross arm (2) are symmetrical about a vertical plane of a hub axis and are respectively connected with two upper cross arm mounting seats (15) on the upright post (11) as revolute pairs, and the rotation axes are overlapped; the structure of the lower cross arm (3) is X-shaped, one end of the lower cross arm (3) is connected with two lower cross arm mounting seats (16) on the upright post (11) in two revolute pairs, and the other end of the lower cross arm (3) is connected with the frame by two coaxial revolute pairs; the first C-shaped arm (4) and the second C-shaped arm (5) are symmetrical about a vertical plane of the axis of the hub, and are connected with a C-shaped arm mounting hole (17) in the upright post (11) through a bolt; motor (6) have the end cover, have the ring flange on the end cover, in motor (6) were fixed in stand (11) inside shoulder hole through flange bolt, stand (11) and main reducer (7) shell structure as an organic whole, motor (6) output power transmitted main reducer (7), carried out first speed reduction, passed to hub reduction gear (8) by the integral key shaft again on, carried out the second and slowed down, transmitted wheel hub assembly (14) at last.

2. The integrated wheel-edge motor assembly of independent suspension as claimed in claim 1, wherein: the first upper cross arm (1) and the second upper cross arm (2) are provided with frame mounting interfaces and are connected with the frame to form a revolute pair; the first upper cross arm (1) and the second upper cross arm (2) are superposed with the axis of a rotating pair formed by the frame.

3. The integrated wheel-edge motor assembly of independent suspension as claimed in claim 1, wherein: the flange shaft tube (12) is connected with a shell of the main speed reducer (7) through a flange bolt, the inside of the flange shaft tube (12) is of a hollow structure, a spline shaft is mounted inside the flange shaft tube (12), the spline shaft is simultaneously connected with the output end of the main speed reducer (7) and the input end of the hub reduction gear (8), a hub assembly (14) is mounted outside the flange shaft tube (12), and the hub assembly (14) can rotate around the flange shaft tube (12); the input end of a main speed reducer (7) is fixedly connected with the output end of a motor (6), the output end of a wheel-side speed reducer (8) is fixedly connected with a wheel hub assembly (14), the main speed reducer (7) is a non-coaxial speed reducer, the wheel-side speed reducer (8) is a coaxial speed reducer, and the axis of the wheel hub assembly (14) is higher than the axis of the motor (6).

4. The integrated wheel-edge motor assembly of independent suspension as claimed in claim 1, wherein: the tail ends of the first C-shaped arm (4) and the second C-shaped arm (5) are respectively provided with an air spring (9) and a mounting interface of a shock absorber (10); the number of the air springs (9) is two, the two air springs are respectively arranged at the secondary tail ends of the first C-shaped arm (4) and the second C-shaped arm (5), and the two air springs are symmetrical about the vertical plane of the axis of the hub; the number of the shock absorbers (10) is two, the shock absorbers are respectively arranged at the tail ends of the first C-shaped arm (4) and the second C-shaped arm (5), and the shock absorbers are symmetrical about a vertical plane of the axis of the hub.

5. The integrated wheel-edge motor assembly of independent suspension as claimed in claim 1, wherein: the brake assembly (13) is fixedly connected to the flange shaft tube (12), and the brake assembly (13) is matched with a brake disc on the hub assembly (14) to realize the braking function of the vehicle.