Independent suspension integrated wheel-side motor assembly

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 wheel hub axis, and are connected to the upper cross arm mounting seat on the column by a revolute pair, and the revolute axis coincides; the lower cross arm structure is "X" shaped, one end of the lower cross arm is connected to the lower cross arm mounting seat on the column by two revolute pairs, and the other end of the lower cross arm is connected to the frame by two coaxial revolute pairs; the two C-shaped arms are symmetrical about the vertical plane of the wheel hub axis, and both are connected to the C-shaped arm mounting hole on the column; the motor is provided with an end cover, and the end cover has a flange, and the motor is fixed in the stepped hole inside the column, and the column and the main reducer housing are an integrated structure, and the motor output power is transmitted to the main reducer, and then transmitted to the wheel-side reducer by the spline shaft, and finally transmitted to the wheel hub assembly. The present invention integrates the motor, transmission system, independent suspension, and braking system, simplifies the system, and highly concentrates the power, which can reduce the unsprung mass of the vehicle and the dynamic load of the wheel, and improve the vehicle's smoothness.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing, in particular to an independent suspension integrated wheel-side motor assembly. Background Art

[0002] In order to meet the market demand of new energy vehicles, more and more vehicle manufacturers are trying to use electric motors instead of engines to provide power in the development of new models. At present, most pure electric vehicles use the traditional integral rigid bridge, plus the motor external structure. This structure has low transmission efficiency, large power loss and space occupation, and even affects the layout of the battery, resulting in a short driving range of the vehicle. On the other hand, due to the use of an integral rigid bridge, the left and right wheels affect each other, resulting in reduced vehicle handling and comfort. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an independent suspension integrated wheel-side motor assembly to replace the traditional rigid bridge combined with a central motor structure to meet the needs of vehicle comfort, riding convenience, energy saving and environmental protection.

[0004] To achieve the above-mentioned purpose, 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-side reducer, an air spring, a shock absorber, a 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 the vertical plane of the wheel hub axis, and are respectively connected to the two upper cross arm mounting seats on the column as a rotating pair, and the rotation axis coincides; the structure of the lower cross arm is "X"-shaped, and one end of the lower cross arm is in two rotating pairs with the two lower cross arm mounting seats on the column. The other end of the lower cross arm is connected to the frame by two coaxial rotating pairs; the first C-shaped arm and the second C-shaped arm are symmetrical about the vertical plane of the wheel hub axis, and the two are connected to the C-shaped arm mounting holes on the column by bolts; the motor has an end cover with a flange plate on the end cover, and the motor is fixed to the stepped hole inside the column by flange bolts. The column and the outer shell of the main reducer are an integrated structure, and the output power of the motor is transmitted to the main reducer for the first deceleration, and then transmitted to the wheel side reducer by the spline shaft for the second deceleration, and finally transmitted to the wheel hub assembly.

[0005] The first upper cross arm and the second upper cross arm are provided with frame mounting interfaces, and are both connected to the frame to form a revolute pair; the revolute pair axis formed by the first upper cross arm, the second upper cross arm and the frame coincides.

[0006] The flange shaft tube is connected to the main reducer housing by flange bolts. The interior of the flange shaft tube is a hollow structure. A spline shaft is installed inside the flange shaft tube. The spline shaft is simultaneously connected to the output end of the main reducer and the input end of the wheel-side reducer. A hub assembly is installed outside the flange shaft tube, and the hub assembly can rotate around the flange shaft tube. The input end of the main reducer is fixedly connected to the output end of the motor, and the output end of the wheel-side reducer is fixedly connected to the hub assembly. The main reducer is a non-coaxial reducer, and the wheel-side reducer is a coaxial reducer. The axis height of the hub assembly is higher than the axis of the motor.

[0007] The ends of the first C-shaped arm and the second C-shaped arm are provided with mounting interfaces for air springs and shock absorbers; the number of the air springs is two, which are respectively mounted at the secondary ends of the first C-shaped arm and the second C-shaped arm, and are symmetrical about the vertical plane of the wheel hub axis; the number of the shock absorbers is two, which are respectively mounted at the ends of the first C-shaped arm and the second C-shaped arm, and are symmetrical about the vertical plane of the wheel hub axis.

[0008] 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.

[0009] Compared with the prior art, the present invention combines the structural advantages of disconnected independent suspension, wheel-side motor drive and low-floor bridge, which can greatly improve the comfort, riding convenience, energy saving and environmental protection of existing city buses. The double wishbone independent suspension structure is adopted to effectively solve the problem of large mass under the spring of the integral rigid bridge. At the same time, under the condition of the same spring pitch, the roll angle stiffness of the independent suspension is greater than that of the integral rigid bridge, thereby improving the safety of the vehicle; the wheel-side motor layout scheme is adopted to solve the problems of large space volume, many transmission system parts, and long transmission chain of the traditional centralized drive; the lower cross arm is designed to be "X" shaped, and two coaxial rotating pairs are used to connect 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 to more reasonably solve the spatial layout problem of dual air springs and dual shock absorbers; the use of dual air springs and dual shock absorbers solves the problem of low load-bearing tonnage of the traditional double wishbone independent suspension; the motor, transmission system, suspension, and braking system are integrated to reduce the system space and weight, and improve the comfort and safety of the vehicle; the main reducer adopts a non-coaxial structure, so that the wheel axis is higher than the motor axis, which reduces the installation height of the motor, thereby reducing the vehicle floor height and improving the convenience of passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 It is the front view of the present invention.

[0012] Figure 3yes Figure 1 Three-dimensional structural diagram of the column.

[0013] 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-side reducer; 9-air spring; 10-shock absorber; 11-column, 12-flange shaft tube; 13-brake assembly; 14-wheel hub assembly, 15-upper cross arm mounting seat, 16-lower cross arm mounting seat, 17-C-shaped arm mounting hole. DETAILED DESCRIPTION

[0014] like Figure 1 , Figure 2 , Figure 3 As shown, 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-side reducer 8, an air spring 9, a shock absorber 10, a column 11, a flange shaft tube 12, a brake assembly 13, and a wheel hub assembly 14.

[0015] The first upper cross arm 1 and the second upper cross arm 2 are respectively connected by two upper cross arm mounting seats 15 on the pillars 11 as a rotation pair, and the rotation axes coincide with each other. The first upper cross arm 1 and the second upper cross arm 2 can be rotatably connected to the frame, and similarly, the rotation axes of the two connected to the frame also coincide with each other. The first upper cross arm 1 and the second upper cross arm 2 are symmetrical about the vertical plane (referred to as plane α) of the wheel hub axis.

[0016] The shape of the lower cross arm 3 is "X"-shaped. One end of the lower cross arm 3 is connected to two lower cross arm mounting seats 16 on the column 11 by a revolute pair, and the two revolute pairs are coaxial. The other end of the lower cross arm 3 can be connected to the frame by two coaxial revolute pairs. The use of two coaxial revolute pairs can increase the connection strength.

[0017] The motor 6 is provided with an end cover, and the end cover is provided with a flange plate, and the motor 6 is fixed to the stepped hole inside the column 11 by means of flange bolts. The column 11 and the housing of the main reducer 7 are an integrated structure, and the main reducer 7 performs the first reduction in speed for the motor power, and the main reducer 7 is a non-coaxial reducer, and the wheel-side reducer 8 is a coaxial reducer, so there is a height difference between the wheel axis and the central axis of the motor 6, which can minimize the vehicle floor height.

[0018] The flange shaft tube 12 is connected to the housing of the main reducer 7 by flange bolts, and the interior 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 to the output end of the main reducer 7 and the input end of the wheel side reducer 8 at the same time. The hub assembly 14 is installed on the flange shaft tube 12, and the hub assembly 14 can rotate around the flange shaft tube 12. The hub assembly 14 is fixedly connected to the output end of the wheel side reducer 8. The output power of the motor 6 is first decelerated by the main reducer assembly 7, and then transmitted to the wheel side reducer 8 by the spline shaft, and then the wheel side reducer 8 is decelerated for the second time, and finally transmitted to the hub assembly 14.

[0019] The first C-shaped arm 4 and the second C-shaped arm 5 are symmetrical about the plane α, and the first C-shaped arm 4 and the second C-shaped arm 5 are fastened to the C-shaped arm mounting hole 17 on the column 11 by 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, and the number of air springs 9 and shock absorbers 10 is two, and each is symmetrical about the plane α. The air springs 9 are respectively mounted on the secondary ends of the first C-shaped arm 4 and the second C-shaped arm 5, and the shock absorbers 10 are respectively mounted on the ends of the first C-shaped arm 4 and the second C-shaped arm 5. The main function of the air springs 9 is to bear the vertical load of the frame, and the main function of the shock absorbers 10 is to reduce the dynamic load of the ground on the wheels to improve the ride comfort of the vehicle.

[0020] The brake assembly 13 is mounted on the flange shaft tube 12 , and the brake assembly 13 cooperates with the brake disc on the wheel hub assembly to achieve the vehicle braking function.

Claims

1. An independent suspension integrated wheel-side motor assembly, characterized in that: The invention 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 reducer (7), a wheel-side reducer (8), an air spring (9), a shock absorber (10), a column (11), a flange shaft tube (12), a brake assembly (13), and a wheel hub assembly (14); the first upper cross arm (1) and the second upper cross arm (2) are symmetrical about the vertical plane of the wheel hub axis, and are respectively connected to two upper cross arm mounting seats (15) on the column (11) by a revolute pair, and the revolute axes coincide; the structure of the lower cross arm (3) is "X"-shaped, one end of the lower cross arm (3) is connected to two lower cross arm mounting seats (16) on the column (11) by two revolute pairs, and the other end of the lower cross arm (3) is connected to the vehicle frame by two coaxial revolute pairs; the first C-shaped arm (4) and the second C-shaped arm (5) are symmetrical about the vertical plane of the wheel hub axis. The motor (6) is symmetrical in plan view, and the two are connected to the C-shaped arm mounting hole (17) on the column (11) by bolts; the motor (6) is provided with an end cover, and the end cover is provided with a flange plate, and the motor (6) is fixed to the stepped hole inside the column (11) by flange bolts, and the column (11) and the housing of the main reducer (7) are an integral structure, and the output power of the motor (6) is transmitted to the main reducer (7) for the first deceleration, and then transmitted to the wheel side reducer (8) by the spline shaft for the second deceleration, and finally transmitted to the wheel hub assembly (14); the first upper cross arm (1) and the second upper cross arm (2) are provided with a frame mounting interface, and are both connected to the frame to form a rotational pair; the rotational pair axis formed by the first upper cross arm (1), the second upper cross arm (2) and the frame coincides; the brake assembly (13) is fixedly connected to the flange shaft tube (12), and the brake assembly (13) cooperates with the brake disc on the wheel hub assembly (14) to realize the vehicle braking function.

2. The independent suspension integrated wheel-side motor assembly according to claim 1, characterized in that: The flange shaft tube (12) is connected to the outer shell of the main reducer (7) via flange bolts. The interior of the flange shaft tube (12) is a hollow structure. A spline shaft is installed inside the flange shaft tube (12). The spline shaft is simultaneously connected to the output end of the main reducer (7) and the input end of the wheel-side reducer (8). A wheel hub assembly (14) is installed outside the flange shaft tube (12). The wheel hub assembly (14) can rotate around the flange shaft tube (12). The input end of the main reducer (7) is fixedly connected to the output end of the motor (6), and the output end of the wheel-side reducer (8) is fixedly connected to the wheel hub assembly (14). The main reducer (7) is a non-coaxial reducer, and the wheel-side reducer (8) is a coaxial reducer. The axis height of the wheel hub assembly (14) is higher than the axis height of the motor (6).

3. The independent suspension integrated wheel-side motor assembly according to claim 1, characterized in that: The ends of the first C-shaped arm (4) and the second C-shaped arm (5) are both provided with mounting interfaces for air springs (9) and shock absorbers (10); the number of the air springs (9) is two, which are mounted at the secondary ends of the first C-shaped arm (4) and the second C-shaped arm (5) respectively, and are symmetrical about the vertical plane of the wheel hub axis; the number of the shock absorbers (10) is two, which are mounted at the ends of the first C-shaped arm (4) and the second C-shaped arm (5) respectively, and are symmetrical about the vertical plane of the wheel hub axis.

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