CN111361371A - An independent suspension integrated wheel motor assembly - Google Patents

Abstract

An independent suspension integrated wheel side motor assembly is used in automobile manufacturing. The two upper cross arms are symmetrical about the vertical plane of the axis of the hub, and are connected with the upper cross arm mounting seat on the column as a rotating pair, and the rotation axes coincide; The cross arm mounting seat is connected by two rotating pairs, and the other end of the lower cross arm is connected with the frame by two coaxial rotating pairs; the two C-shaped arms are symmetrical about the vertical plane of the axis of the hub, and the two are symmetrical with the C-shaped The arm mounting hole is connected; the motor has an end cover, and the end cover has a flange plate, the motor is fixed in the inner stepped hole of the column, the column and the main reducer shell are integrated, the motor output power is transmitted to the main reducer, and then the The key shaft is transmitted to the wheel side reducer, and finally to the wheel hub assembly. The invention integrates the motor, the transmission system, the independent suspension and the braking system, the system is simplified, the power is highly concentrated, the unsprung mass of the vehicle and the dynamic load of the wheel can be reduced, and the ride comfort of the vehicle can be improved.

Description

An independent suspension integrated wheel motor assembly

technical field

The invention relates to the technical field of automobile manufacturing, in particular to an independent suspension integrated wheel motor assembly.

Background technique

In order to meet the needs of the new energy vehicle market, more and more vehicle manufacturers have begun to try to use electric motors instead of engines to provide power in the development of new models. At present, the vast majority of pure electric vehicles use the traditional car integral rigid bridge, coupled with the motor plug-in structure, this structure has low transmission efficiency, power loss and takes up a lot of space, and even affects the layout of the battery, causing the vehicle to continue to operate. The driving mileage is short; on the other hand, due to the use of an integral rigid axle, the left and right wheels affect each other, resulting in reduced vehicle handling and comfort.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the purpose of the invention of the present invention is to provide an independent suspension integrated wheel motor assembly, which is used to replace the structure of the traditional rigid bridge combined with the central motor, so as to meet the comfort and convenience of the vehicle. performance, energy saving and environmental protection.

In order to achieve the above purpose of the invention, the present invention includes 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 reducer, and an air spring , shock absorber, column, flange shaft tube, brake assembly, hub assembly; the first upper transverse arm and the second upper transverse arm are symmetrical with respect to the vertical plane of the axis of the wheel hub, and are respectively aligned with the two on the column. The upper cross arm mounting seat is connected by a rotating pair, and the rotation axes are coincident; the structure of the lower cross arm is an "X" shape, and one end of the lower cross arm is connected with the two lower cross arm mounting seats on the column in two rotating pairs, and the lower cross arm is connected by two rotating pairs. The other end of the cross arm is connected with the frame by two coaxial rotating pairs; the first C-shaped arm and the second C-shaped arm are symmetrical with respect to the vertical plane of the axis of the wheel hub, and the two are connected to the C-shaped arm mounting hole on the column. Bolted connection is adopted; the motor has an end cover with a flange on the end cover. The motor is fixed in the inner stepped hole of the column through flange bolts. Reducer, the first deceleration is carried out, and then the spline shaft is transmitted to the wheel side reducer for the second deceleration, and finally transmitted to the wheel hub assembly.

The first upper transverse arm and the second upper transverse arm are provided with a frame mounting interface, which are both connected with the vehicle frame to form a rotating pair;

The flange shaft tube and the main reducer shell are connected by flange bolts, the inside of the flange shaft tube is a hollow structure, and a spline shaft is installed inside the flange shaft tube, and the spline shaft is simultaneously connected with the output end of the main reducer. , The input end of the wheel side reducer is connected, the flange shaft tube is installed with a wheel hub assembly, and the wheel hub assembly can rotate around the flange shaft tube; the input end of the main reducer is fixedly connected with the output end of the motor, and the wheel side decelerates The output end of the reducer is fixedly connected with the wheel hub assembly, the main reducer is a non-coaxial reducer, the wheel side reducer is a coaxial reducer, and the axis height of the wheel hub assembly is higher than the axis of the motor.

The ends of the first C-shaped arm and the second C-shaped arm are provided with installation interfaces for air springs and shock absorbers; the number of the air springs is two, which are respectively installed on the first C-shaped arm and the second C-shaped arm. The second end of the C-shaped arm is symmetrical with respect to the vertical plane of the axis of the hub; the number of the shock absorbers is two, which are respectively installed at the ends of the first C-shaped arm and the second C-shaped arm, and are perpendicular to the axis of the hub. Plane symmetry.

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

Compared with the prior art, the present invention combines the structural advantages of the disconnected independent suspension, the wheel motor drive and the low-floor bridge, which can greatly improve the comfort and convenience of the existing city bus. performance, energy saving and environmental protection. The double wishbone independent suspension structure is used to solve the problem of large unsprung mass of the integral rigid bridge. At the same time, under the same spring distance, the roll angle stiffness of the independent suspension is greater than that of the integral rigid bridge, thereby improving the Vehicle safety; the wheel-side motor arrangement scheme is adopted to solve the problems of large space, large transmission system components, and long transmission chain of the traditional centralized drive; the lower cross arm is designed in an "X" shape, and two coaxial The rotating pair is connected with the column, which solves the problem of connection strength under large tonnage; the first C-shaped arm and the second C-shaped arm structure are adopted, which reasonably solves the problem of spatial arrangement of double air springs and double shock absorbers; Air springs and double shock absorbers solve the problem of low bearing tonnage of traditional double wishbone independent suspension; the integration of motor, transmission system, suspension and braking system reduces system space and weight and improves vehicle comfort The main reducer adopts a non-coaxial structure, so that the axis of the wheel is higher than the axis of the motor, which reduces the installation height of the motor, thereby reducing the floor height of the vehicle and improving the convenience of passengers.

Description of drawings

FIG. 1 is a perspective structural view of the present invention.

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

FIG. 3 is a perspective structural view of the upright column of FIG. 1 .

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

Detailed ways

As shown in Figure 1, Figure 2, Figure 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. The main reducer 7, the wheel reducer 8, the air spring 9, the shock absorber 10, the column 11, the flange shaft tube 12, the brake assembly 13, and the wheel hub assembly 14.

The two upper cross arm mounting seats 15 on the upright column 11 of the first upper cross arm 1 and the second upper cross arm 2 are respectively connected by rotation pairs, and the rotation axes are coincident. The first upper cross arm 1 and the second upper cross arm 2 are It can be rotatably connected to the frame, and the rotation axes of the two are also coincident with the frame. The first upper cross arm 1 and the second upper cross arm 2 are symmetrical about the vertical plane of the hub axis (referred to as plane α).

The shape of the lower cross arm 3 is an "X" shape, one end of the lower cross arm 3 is connected with the two lower cross arm mounting seats 16 on the upright column 11 as a rotating pair, and the two rotating pairs are coaxial, and the other side of the lower cross arm 3 is connected. One end can be connected with the frame by two coaxial rotating pairs, and the connection strength can be increased by using two coaxial rotating pairs.

The motor 6 is provided with an end cover, and the end cover is provided with a flange, and the motor 6 is fixed in the inner stepped hole of the column 11 through flange bolts. The upright column 11 and the outer casing of the main reducer 7 are integrally constructed. The main reducer 7 is the motor power for the first deceleration, the main reducer 7 is a non-coaxial reducer, and the wheel reducer 8 is a coaxial reducer. There is a height difference between the wheel axis and the central axis of the motor 6, which can minimize the height of the vehicle floor.

The flange shaft tube 12 is connected with the outer casing of the main reducer 7 by flange bolts, and the inside of the flange shaft tube 12 is a hollow structure. A spline shaft is installed inside the flange shaft tube 12 , and the spline shaft is connected with the output end of the main reducer 7 and the input end of the wheel reducer 8 at the same time. The wheel hub assembly 14 is installed on the flange shaft tube 12, the wheel hub assembly 14 can rotate around the flange shaft tube 12, the wheel hub assembly 14 is fixedly connected with the output end of the wheel side reducer 8, and the output power of the motor 6 passes through the main deceleration. After the first deceleration of the reducer assembly 7, it is transmitted to the wheel side reducer 8 by the spline shaft, and the second deceleration is carried out by the wheel side reducer 8, and finally transmitted to the wheel hub assembly 14.

The first C-shaped arm 4 and the second C-shaped arm 5 are symmetrical with respect to the plane α, and the first C-shaped arm 4, the second C-shaped arm 5 and the C-shaped arm mounting hole 17 on the column 11 are fastened with bolts. The ends of the first C-shaped arm 4 and the second C-shaped arm 5 are provided with mounting seats for air springs 9 and shock absorbers 10. The number of air springs 9 and shock absorbers 10 is two, and each is symmetrical about the plane α. , the air spring 9 is installed on the secondary end of the first C-shaped arm 4 and the second C-shaped arm 5 respectively, the shock absorber 10 is installed at the end of the first C-shaped arm 4 and the second C-shaped arm 5 respectively, the air spring 9 The main function is to bear the vertical load of the frame, and the main function of the shock absorber 10 is to reduce the dynamic load on the ground facing the wheels, so as to improve the ride comfort of the vehicle.

The brake assembly 13 is installed on the flange shaft tube 12, and the brake assembly 13 cooperates with the brake disc on the wheel hub assembly, thereby realizing the vehicle braking function.

Claims (5)

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.

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