CN209813624U - Automobile drive axle and automobile - Google Patents

Abstract

The utility model provides an automobile drive axle and car. This automobile transaxle includes: the driving mechanism provides driving force for the automobile, and the automobile driving axle is arranged in bilateral symmetry relative to the driving mechanism; the wheel hub is connected with the driving mechanism through a transmission shaft; the steering knuckle is sleeved on the outer wall surface of the transmission shaft and is fixedly connected with the inner ring of the hub; wherein the steering knuckle is connected with a steering system and a braking system. The utility model discloses an automobile drive axle's axle is as drive mechanism transmission actuating mechanism's power to wheel hub, drives wheel hub through the transmission shaft and rotates, saves the space in the automobile body to reduce the weight of transaxle, reduced the intensity demand to automobile body and axle.

Description

Automobile drive axle and automobile

Technical Field

The utility model relates to the technical field of automobiles, in particular to car rear wheel drive axle and car.

Background

The axle of the automobile is connected with the automobile body through a suspension, and wheels are installed at the two ends of the axle. The axle is used for bearing the load of the automobile and maintaining the normal running of the automobile on the road.

The axle and the driving structure of the existing axle system are separated, the driving mechanism is separately installed on the vehicle body, the connection between the driving mechanism and the axle occupies a large space of the vehicle body, and the whole suspension has heavy weight, so that the vehicle body and the axle need to meet higher strength requirements.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an automobile drive axle, this automobile drive axle includes:

the driving mechanism provides driving force for the automobile, and the automobile driving axle is arranged in bilateral symmetry relative to the driving mechanism;

the wheel hub is connected with the driving mechanism through a transmission shaft; and

the steering knuckle is sleeved on the outer wall surface of the transmission shaft and is fixedly connected with the inner ring of the hub;

wherein the steering knuckle is connected with a steering system and a braking system.

Further, the drive mechanism includes:

an electric motor; and

the speed adjusting unit is connected with the motor;

the electric motor and the speed adjusting unit are both mounted on the vehicle body, and the output end of the speed adjusting unit is connected with the transmission shaft.

Further, the rate adjustment unit includes a speed reducer and a differential;

the speed reducer and the differential are of an integrated structure.

Furthermore, the knuckle is provided with a transmission shaft mounting hole, and the transmission shaft penetrates through the transmission shaft mounting hole and is connected with the wheel hub.

Further, the steering system includes:

the rocker arm is arranged on the vehicle body through a rocker arm bracket and is connected with the steering tie rod;

and the tie rod is connected with the steering knuckles on the left side and the right side through the knuckle arms.

Further, the steering system further includes:

one end of the upper swing arm is mounted on an upper swing arm mounting part of the steering knuckle through a pin shaft, and the other end of the upper swing arm is mounted on the vehicle body;

one end of the lower swing arm is mounted on a lower swing arm mounting part of the steering knuckle through a pin shaft, and the other end of the lower swing arm is mounted on the vehicle body;

wherein the axes of the pins coincide so that the knuckle has rotational freedom to turn about the axis.

Furthermore, the upper end faces of the upper swing arm and the lower swing arm are provided with air bags.

Further, the brake system includes:

a brake caliper mounted to the knuckle; and

and the brake air chamber is arranged on the brake caliper.

Further, the automobile drive axle also comprises a shock absorber,

one end of the shock absorber is arranged on the vehicle body, and the other end of the shock absorber is arranged on the lower swing arm.

The embodiment of the utility model provides a still provide a car, this car includes foretell automobile drive axle.

According to the technical scheme provided by the utility model, the utility model discloses an automobile drive axle's axle is as drive mechanism transmission actuating mechanism's power to wheel hub, rotates through transmission shaft drive wheel hub, saves the space in the automobile body to reduce the weight of transaxle, reduced the intensity demand to automobile body and axle.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

Fig. 1 is a schematic view of an automobile drive axle according to an embodiment of the present invention.

Fig. 2 is a perspective view of a knuckle and a knuckle arm according to an embodiment of the present invention.

Fig. 3 is a front view of a knuckle and a knuckle arm according to an embodiment of the present invention.

Fig. 4 is a left side view of the knuckle according to the embodiment of the present invention.

Wherein: 1-a driving mechanism, 2-a steering knuckle, 3-a transmission shaft, 4-a hub, 5-a rocker arm, 6-a rocker arm bracket, 7-a steering tie rod, 8-an air bag, 9-a steering knuckle arm, 10-an upper swing arm, 11-a lower swing arm, 12-a brake caliper, 13-a brake air chamber and 14-a shock absorber;

101-a rate adjustment unit;

20-body, 201-transmission shaft mounting hole, 202-upper swing arm mounting part, 202 a-upper swing arm mounting hole, 202 b-upper swing arm mounting surface, 203-lower swing arm mounting part, 203 a-lower swing arm mounting hole, 203 b-lower swing arm mounting surface, 204-first end surface, 205-second end surface, 206-knuckle arm mounting hole, 207-hub connecting hole, 208-brake caliper mounting hole and 209-oil filler hole;

901-tie rod mounting hole, alpha-kingpin inclination.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals refer to like parts in the drawings.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.

In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree and order of importance, the premise that each other exists, and the like.

In this context, "equal", "same", etc. are not strictly mathematical and/or geometric limitations, but also include tolerances as would be understood by a person skilled in the art and allowed for manufacturing or use, etc. Unless otherwise indicated, numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges subsumed therein.

In order to solve the technical problem among the prior art that axle occupation space to the car is big, weight is big, as shown in fig. 1, the embodiment of the utility model provides an automobile drive axle, this automobile drive axle includes:

a drive mechanism 1, wherein the drive mechanism 1 provides the driving force of the automobile, and the automobile drive axle is arranged symmetrically left and right relative to the drive mechanism 1;

a hub 4, wherein the hub 4 is connected with the driving mechanism 1 through a transmission shaft 3; and

the steering knuckle 2 is sleeved on the outer wall surface of the transmission shaft 3 and is fixedly connected with the inner ring of the hub 4;

wherein the steering knuckle 2 is connected with the automobile suspension to realize the steering and braking of the automobile.

It can be understood that the driving mechanism 1 drives the hub 4 of the automobile to move forward, the driving mechanism 1 is positioned in the middle of the advancing direction of the automobile, so that the left side and the right side of the automobile are symmetrical relative to the driving mechanism 1, and the symmetrical arrangement prevents the automobile from being overweight under the action of the self weight; the hub 4 is directly connected with the driving mechanism 1 through the transmission shaft 3, namely the output end of the driving mechanism 1 directly drives the hub 4 through the transmission shaft 3, and the connection mode omits a connecting rod structure between the hub 4 and the driving mechanism 1, so that the automobile drive axle occupies small space of an automobile body; in the prior art, an axle is connected with a hub 4, the axle transmits power to the hub 4 and drives the hub 4 to rotate, transmission shafts 3 on the left side and the right side of the automobile driving axle in the application play a role in transmitting power, the hub 4 is driven to rotate through the transmission shafts 3, and the weight of the driving axle is reduced under the condition of reducing the occupied volume; the steering knuckle 2 is connected with a steering system and a braking system, and steering and braking of a vehicle are achieved through an automobile suspension.

Wheels are installed at two ends of an axle in the prior art, the axle is separated from a driving structure, the driving mechanism is installed on an automobile body independently, the driving mechanism and the axle are connected to occupy a large space of the automobile body, and the whole suspension is heavy, so that the automobile body and the axle need to meet higher strength requirements. In the embodiment of this application, this automobile drive axle's axle is as drive mechanism, and 3 power to wheel hub 4 of transmission drive mechanism 1 through the transmission shaft, drive wheel hub 4 through transmission shaft 3 and rotate, save the space in the automobile body to reduce the weight of transaxle, reduced the intensity demand to automobile body and axle.

Specifically, the drive mechanism 1 includes:

an electric motor; and

a speed adjusting unit 101, wherein the speed adjusting unit 101 is connected with the motor;

wherein, the motor and the speed adjusting unit 101 are both mounted on the vehicle body, and the output end of the speed adjusting unit 101 is connected with the transmission shaft 3.

In actual use, the motor operates to provide power, the power is transmitted to the speed adjusting unit 101, the speed adjusting unit 101 is used for adjusting the rotating speed of the hub 4, so that power adjustment is performed inside the speed adjusting unit 101, namely, the rotating speed and the torque of an output shaft of the speed adjusting unit 101 are adjusted, the output end of the output shaft outputs power, the output end is connected with the transmission shaft 3, the hub 4 is driven to rotate according to a set rotating speed through the transmission shaft 3, and the motor and the speed adjusting unit 101 are installed on a vehicle body, so that the gravity load on an axle is reduced.

In one example, the rate adjustment unit 101 includes a speed reducer and a differential. The speed reducer reduces the rotation speed and increases the torque in the automobile power system, and is a speed reducing device for transmitting the power of an engine to a hub 4. The differential mechanism allows the transmission shafts 3 at the two sides to rotate at different rotating speeds while transmitting power to the transmission shafts 3 at the two sides, so that the condition that wheels at the two sides run in a pure rolling mode at unequal distances as far as possible is met, and the friction between tires and the ground is reduced.

And preferably, the speed reducer and the differential are of a unitary construction. That is, the speed reducer and the differential are installed in the same speed adjusting unit 101, the speed adjusting unit 101 is installed on the vehicle body, the integrated structural form can reduce the space occupied by the speed reducer and the differential, the integration level of the vehicle is improved, and the integrated structural form omits a shaft and a respective shell required when the speed reducer and the differential are connected, so that the weight of the drive axle can be reduced.

The knuckle 2 is provided with a transmission shaft mounting hole 201, and the transmission shaft 3 penetrates through the transmission shaft mounting hole 201 and is connected with the hub 4. It will be appreciated that when it is desired to drive the hub 4 in rotation, the drive shaft 3 drives the hub 4 in rotation, so that the drive shaft 3 rotates simultaneously with the hub 4, and the knuckle 2 is used to mount the vehicle suspension and does not need to rotate simultaneously with the hub 4, so that the knuckle 2 is fixed to the inner ring of the hub 4, the drive shaft 3 passes through the knuckle 2, and there is no interconnection between the drive shaft 3 and the knuckle 2.

In one example, the automotive suspension includes a steering system and a braking system;

the steering system includes:

a rocker arm 5, the rocker arm 5 being mounted to the vehicle body through a rocker arm bracket 6, and the rocker arm 5 being connected to a tie rod 7;

and tie rods 7, the tie rods 7 being connected to the left and right knuckles 2 via knuckle arms 9.

It can be understood that when steering is required, external force is applied to the rocker arm 5, the rocker arm 5 is mounted in a tapered hole of the rocker arm support 6, the rocker arm 5 can rotate around the axis of the rocker arm support 6, the rocker arm 5 drives the tie rod 7 to move when rotating under the external force, the tie rod 7 is connected with the knuckle 2 through the knuckle arm 9, so that the tie rod 7 drives the knuckles 2 on the left and right sides to rotate, and the knuckles 2 are fixedly connected with the inner ring of the hub 4, so that the hub 4 rotates along with the knuckle 2, and steering is realized.

Further, the steering system further includes:

an upper swing arm 10, one end of the upper swing arm 10 is mounted on the upper swing arm mounting part 202 of the knuckle 2, and the other end is mounted on the vehicle body;

a lower swing arm 11, one end of the lower swing arm 11 being attached to the lower swing arm attachment portion 203 of the knuckle 2, and the other end being attached to the vehicle body;

the upper swing arm 10 and the lower swing arm 11 are relatively mounted to the knuckle 2 by pins whose axes coincide so that the knuckle 2 has a rotational degree of freedom to rotate about the axes.

During the in-service use, go up swing arm 10 one end and knuckle 2 articulated, the other end is fixed in the automobile body, so that knuckle 2 can rotate around this last swing arm 10 round pin axle, lower swing arm 11 one end is articulated with knuckle 2, the other end is fixed in the automobile body, so that knuckle 2 can rotate around this lower swing arm 11 round pin axle, and the axis coincidence of the round pin axle that sets up relatively, therefore this knuckle 2 can rotate around this axis, this axis is virtual king pin promptly, rotate around this virtual king pin when wheel hub 4 turns to promptly, this virtual king pin replaces the entity king pin, make the space that this king pin occupy little, and use the round pin axle can realize that wheel hub 4 turns to in a flexible way and gyration.

Further, the upper end face of the upper swing arm 10 is provided with the airbag 8, specifically, the upper end face of the airbag 8 is provided with the vehicle body, and the lower base is provided with the upper swing arm 10. It can be understood that the air bag 8 is used for realizing the buffering of the vehicle body, when the vehicle runs on the rugged road surface, the air bag 8 can reduce the vibration to which the vehicle body is subjected, namely the vibration of the vehicle body, and one end of the air bag 8 is arranged on the upper end surface of the upper swing arm 10, and the other end of the air bag is connected with the vehicle body, when the vehicle body needs to be adjusted in height, the inflation pressure of the air bag 8, namely the volume of the air bag 8 can be adjusted to realize the adjustment of the height of the vehicle body.

In one example, the braking system includes:

a brake caliper 12, the brake caliper 12 being attached to the knuckle 2; and

and a brake chamber 13, wherein the brake chamber 13 is mounted on the brake caliper 12.

The brake system is used for braking the wheel hub 4, the brake caliper 12 is installed on the steering knuckle 2, the brake air chamber 13 is installed on the brake caliper 12, and the brake caliper 12 is matched with the brake air chamber 13 to brake the wheel hub 4.

The automobile drive axle further comprises a damper 14, wherein one end of the damper 14 is mounted on the automobile body, and the other end of the damper 14 is mounted on the lower swing arm 11. The shock absorber 14 is matched with the air bag 8, when the vehicle encounters uneven road surfaces, the shock absorber buffers the vehicle to achieve shock absorption of the vehicle, one end of the shock absorber 14 is installed on the vehicle body, the other end of the shock absorber is installed on the lower swing arm 11, the shock absorber 14 does not need a shock absorber support to support, and only the shock absorber is directly installed on the lower swing arm 11, so that the internal space of the vehicle body occupied by the shock absorber 14 is small, and the integration level of the whole drive axle is high.

In one example, as shown in fig. 2-4, the knuckle 2 includes:

a body 20, the body 20 including opposing first and second end faces 204, 205;

an upper swing arm mounting part 202, wherein the upper swing arm mounting part 202 is provided with an upper swing arm mounting hole 202 a; and

a lower swing arm mounting part 203, wherein the lower swing arm mounting part 203 is provided with a lower swing arm mounting hole 203 a;

wherein, the upper swing arm mounting part 202 and the lower swing arm mounting part 203 are located on the second end surface 205;

the axes of the upper swing arm mounting hole 202a and the lower swing arm mounting hole 203a coincide, and the axes have a kingpin inclination angle α.

The upper swing arm mounting hole 202a of the upper swing arm mounting portion 202 of the knuckle 2 is used for mounting the upper swing arm 10, the lower swing arm mounting hole 203a of the lower swing arm mounting portion 203 is used for mounting the lower swing arm 11, the axes of the upper swing arm mounting hole 202a and the lower swing arm mounting hole 203a coincide, the knuckle 2 is rotatable relative to the upper swing arm 10 and the lower swing arm 11, the knuckle 2 rotates relative to the upper swing arm 10 and the lower swing arm 11 around the axis because the axes of the upper swing arm mounting hole 202a and the lower swing arm mounting hole 203a coincide and the axis has a kingpin inclination angle α, and the knuckle 2 rotates with an inclination angle, namely the kingpin inclination angle α.

The upper swing arm mounting hole 202a and the lower swing arm mounting hole 203a may be stepped holes, pin shafts are mounted in the stepped holes, and bearings are provided between the pin shafts and the stepped holes to realize relative rotation of the pin shafts and the stepped holes, so that the knuckle 2 can rotate relative to the upper swing arm 10 and the lower swing arm 11.

In an optional example, oil filler point 209 has all been seted up to this upper swing arm mounting hole 202a and lower swing arm mounting hole 203a, and this oil filler point 209 is used for lubricating the bearing in the step hole, and when the vehicle normal operating, uses to block up and seals this oil filler point 209, only need open this when needs maintain and block up and can pass through oil filler point 209 to the bearing oiling, guarantee the lubricating property of bearing, improve the life of bearing.

Specifically, the upper swing arm mounting portion 202 is provided with an upper swing arm mounting surface 202b, the lower swing arm mounting portion 203 is provided with a lower swing arm mounting surface 203b, the upper swing arm mounting surface 202b and the lower swing arm mounting surface 203b are arranged in parallel, the upper swing arm mounting surface 202b is used for mounting the upper swing arm 10, the lower swing arm mounting surface 203b is used for mounting the lower swing arm 11, and the upper swing arm 10 and the lower swing arm 11 after the mounting is completed are arranged in parallel, so that the knuckle 2 can rotate relative to the upper swing arm 10 and the lower swing arm 11 at the same time.

Further, the main body 20 of the knuckle 2 is provided with a transmission shaft mounting hole 201, and the transmission shaft mounting hole 201 penetrates between a first end surface 204 and a second end surface 205 of the main body 20. The driving shaft mounting hole 201 is used for mounting the driving shaft 3, the driving shaft 3 passes through the knuckle 2 to be connected with the hub 4, and preferably, a gap exists between the knuckle 2 and the driving shaft 3 so that the knuckle 2 does not contact with the driving shaft 3, so that the knuckle 2 does not interfere with the driving shaft 3 when the driving shaft 3 drives the hub 4 to rotate.

In one example, the knuckle 2 further includes a knuckle arm mounting hole 206;

the knuckle arm 9 is detachably connected to the knuckle 2 through a knuckle arm mounting hole 206;

the knuckle arm 9 is provided with a tie rod mounting hole 901, and an axis of the tie rod mounting hole 901 is perpendicular to an axis of the transmission shaft mounting hole 201.

The knuckle arm 9 is detachably connected to the knuckle 2, preferably by a bolt. The knuckle 2 is connected with a tie rod 7 through a knuckle arm 9, so that the tie rod 7 can drive the knuckle 2 to realize steering of the hub 4, and the axis of the tie rod mounting hole 901 is perpendicular to the axis of the transmission shaft mounting hole 201, thereby facilitating the installation of the knuckle arm 9 and the tie rod 7.

In an alternative embodiment, the tie rod mounting hole 901 of the knuckle arm 9 is a tapered hole, that is, the knuckle arm 9 and the tie rod 7 are connected by a tapered pin, and the tapered pin is connected firmly, so that after the installation is completed, the knuckle arm 9 and the tie rod 7 are connected firmly, and the tie rod 7 cannot be pulled out from the tie rod mounting hole 901 of the knuckle arm 9 in the use process.

In one example, the body 20 of the knuckle 2 is opened with a hub connection hole 207, the hub connection hole 207 penetrates through the first end surface 204 and the second end surface 205, so that the knuckle 2 is bolted to the hub 4, and the first end surface 204 of the knuckle 2 contacts the hub 4, and the knuckle 2 is fixedly connected to the inner ring of the hub 4, so that the steering of the hub 4 is realized through the knuckle 2.

In an alternative example, the hub connection hole 207 is opened in the circumferential direction of the transmission shaft mounting hole 201, the hub connection hole 207 is used for connecting the knuckle 2 with the hub 4, the hub connection hole 207 is opened in the circumferential direction of the transmission shaft mounting hole 201, the volume of the knuckle 2 can be saved, the volume of the knuckle 2 is made as small as possible, and preferably, the hub connection hole 207 can be overlapped with the knuckle arm mounting hole 206, that is, the hub connection hole 207 can be used for mounting the knuckle arm 9, so that the volume of the knuckle 2 occupied by the hub connection hole 207 and the knuckle arm mounting hole 206 is further reduced, and the integration degree of the knuckle 2 is high.

Further, the knuckle 2 is further provided with a caliper mounting hole 208, the caliper mounting hole 208 is used for mounting the caliper 12 on the knuckle 2 to realize braking on the wheel hub 4, and preferably, the caliper mounting hole 208 includes three caliper mounting holes 208 located at the upper part of the knuckle 2 and two caliper mounting holes 208 located at the lower part of the knuckle 2.

Embodiments of the present application also provide an automobile, and it can be understood that the automobile includes the above-mentioned automobile drive axle, the integration level of the automobile is high, the axle and the drive system are integrated, the space in the automobile is saved, and the weight of the whole drive axle is small.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.

The above list of details is only for the feasible embodiments of the present invention and is not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of the features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.

Claims (10)

1. An automotive transaxle, comprising:

the driving mechanism (1) provides driving force of the automobile, and the automobile driving axle is arranged in bilateral symmetry relative to the driving mechanism (1);

the wheel hub (4), the said wheel hub (4) couples to said driving mechanism (1) through the drive shaft (3); and

the steering knuckle (2) is sleeved on the outer wall surface of the transmission shaft (3) and is fixedly connected with the inner ring of the hub (4);

wherein the steering knuckle (2) is connected with a steering system and a braking system.

2. The vehicle transaxle of claim 1 wherein the drive mechanism (1) comprises:

an electric motor; and

a speed adjustment unit (101), said speed adjustment unit (101) being connected to said motor;

the motor and the speed adjusting unit (101) are both mounted on a vehicle body, and the output end of the speed adjusting unit (101) is connected with the transmission shaft (3).

3. The automotive transaxle of claim 2 wherein the speed adjustment unit (101) comprises a reduction gear and a differential;

the speed reducer and the differential are of an integrated structure.

4. The automobile drive axle according to claim 2, characterized in that the knuckle (2) is provided with a transmission shaft mounting hole (201), and the transmission shaft (3) is inserted into the transmission shaft mounting hole (201) and connected with the hub (4).

5. The automotive transaxle of claim 2 wherein the steering system comprises:

the rocker arm (5) is mounted on a vehicle body through a rocker arm bracket (6), and the rocker arm (5) is connected with a steering tie rod (7);

and the tie rod (7) is connected to the steering knuckles (2) on the left side and the right side through knuckle arms (9).

6. The automotive transaxle of claim 5 wherein the steering system further comprises:

one end of the upper swing arm (10) is mounted on an upper swing arm mounting part (202) of the steering knuckle (2) through a pin shaft, and the other end of the upper swing arm (10) is mounted on a vehicle body;

one end of the lower swing arm (11) is mounted on a lower swing arm mounting part (203) of the steering knuckle (2) through a pin shaft, and the other end of the lower swing arm (11) is mounted on a vehicle body;

wherein the axes of the pins coincide such that the knuckle (2) has a rotational degree of freedom to turn around the axes.

7. The vehicle drive axle according to claim 6, characterized in that an airbag (8) is mounted to the upper end face of the upper swing arm (10).

8. The automotive transaxle of claim 5 wherein the brake system comprises:

a brake caliper (12), the brake caliper (12) being mounted to the knuckle (2); and

a brake chamber (13), the brake chamber (13) being attached to the brake caliper (12).

9. The vehicle transaxle of claim 6 further comprising a shock absorber (14);

one end of the shock absorber (14) is mounted on the vehicle body, and the other end of the shock absorber is mounted on the lower swing arm (11).

10. A vehicle comprising a vehicle transaxle of any one of claims 1-9.