WO2022110994A1

WO2022110994A1 - Braking system and electric drive axle

Info

Publication number: WO2022110994A1
Application number: PCT/CN2021/118846
Authority: WO
Inventors: 吴志强; 李春光; 杨鹏飞
Original assignee: 广东富华重工制造有限公司
Priority date: 2020-11-24
Filing date: 2021-09-16
Publication date: 2022-06-02
Also published as: CN114537337A

Abstract

A braking system and an electric drive axle. The braking system comprises a support frame (10), a camshaft (40), an adjustment arm (20), and a braking air chamber (30); the support frame (10) is provided with an inner end face (101), an outer end face opposite the inner end face (101), and a side face (102) located at the periphery of the support frame (10), an avoidance groove (13) is provided on the support frame (10), the avoidance groove (13) forms a first opening (131) on the inner end face (101) and forms a second opening (132) on the side face (102); the camshaft (40) is pivotally connected on the support frame (10); the adjustment arm (20) is located at an inner side of the inner end face (101) of the support frame (10), and comprises a first end (21) connected to the camshaft (40), and a second end (22) away from the first end (21), portions on the adjustment arm (20) located at the first end (21) and the second end (22) are placed within the avoidance groove (13) and the second end (22) is located between the inner end face (101) and the outer end face of the support frame (10); the braking air chamber (30) is mounted on the support frame (10), and a push rod (31) of the braking air chamber (30) is connected to the second end (22) of the adjustment arm (20).

Description

Braking system and electric drive axle

technical field

The invention relates to the technical field of vehicles, in particular to a braking system and an electric drive axle.

Background technique

With the continuous development of new energy technologies, some vehicles gradually use electric drive systems to replace traditional fuel engines in order to achieve the purpose of energy saving and environmental protection. These axles are usually equipped with drum brakes, which include brake shoes, camshafts, adjustment arms, and brake air chambers, wherein the brake shoes are installed in the brackets of the axles for connecting with those located in the brackets. The brake drum frictionally cooperates to provide braking force, and the brake air chamber pushes the adjustment arm to swing to drive the camshaft to move, which in turn drives the brake shoe to swing. At the same time, since a hub motor needs to be installed on the outer side of the bracket, the adjusting arm must be set on the inner side of the bracket, and the push rod of the brake air chamber needs to be connected to the adjusting arm. At its center position, to connect the push rod of the brake air chamber with the adjusting arm, at least a part of the brake air chamber should protrude from the inner end face of the bracket, which will cause the brake air chamber to occupy the vehicle. of the interior space.

SUMMARY OF THE INVENTION

One objective of the present invention is to provide a braking system which can avoid occupying the interior space of the vehicle on the premise of satisfying the braking requirements.

The second objective of the present invention is to provide an electric drive axle.

To achieve the above object one, the present invention adopts the following technical solutions:

Braking system, including brackets, camshafts, adjustment arms, and brake chambers;

The bracket is provided with an inner end surface, an outer end surface opposite to the inner end surface, and a side surface located at the periphery of the bracket, and an avoidance groove is arranged on the bracket, and the avoidance groove forms a first opening on the inner end surface and a second opening on the side surface;

The camshaft is pivotally connected to the bracket;

The adjustment arm is located on the inner side of the inner end face of the bracket, and includes a first end connected with the camshaft and a second end away from the first end, the parts of the adjustment arm located at the first end and the second end are placed in the escape groove and the second end is the end is located between the inner end face and the outer end face of the bracket;

The brake air chamber is mounted on the bracket, and the push rod of the brake air chamber is connected to the second end of the adjusting arm.

The inner end face of the bracket is provided with a concave position, the bracket is provided with a shaft hole extending from the bottom surface of the concave position to the outer end face, the camshaft is penetrated in the shaft hole, and the first opening of the avoidance groove is communicated with the concave position. The first end of the arm is received in the recess and is connected with the camshaft.

The bracket is provided with connecting ribs connected between two sides of the avoidance groove.

The second end of the adjusting arm is located on the side of the connecting rib away from the inner end face.

The adjusting arm is provided with a first bent portion bent from the first end toward the escape groove, and a second bent portion bent outward in the radial direction of the bracket from the side of the first bent portion away from the first end.

A mounting frame is fixed on the side of the bracket, and the brake air chamber is fixed on the mounting frame.

A mounting surface is arranged on the bracket, and a through slot is arranged on the mounting surface. The front end surface of the brake air chamber is fitted and fixed on the installation surface. The second end of the arm is connected.

For realizing the above-mentioned purpose two, the present invention adopts following technical scheme:

Electric drive axle, including the above-mentioned braking system.

In the present invention, the adjusting arm is placed on the inner end face of the bracket so that the first end is connected with the camshaft at the inner end face of the bracket, so as to meet the braking requirements of the vehicle, and at the same time, the adjusting arm is accommodated through the avoidance groove, and the adjusting arm is connected to the braking system. The second end of the connection of the dynamic air chamber is located between the inner end face and the outer end face of the bracket, so as to prevent the brake air chamber from occupying the space inside the inner end face of the bracket, thereby preventing the brake air chamber from occupying the inner space of the vehicle.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the installation schematic diagram of the present invention;

3 is a cross-sectional view of the present invention.

Detailed ways

Below, in conjunction with accompanying drawing and specific embodiment, the present invention is further described:

As shown in Figures 1, 2 and 3, it is a braking system of the present invention, specifically a braking system applied to an electric drive axle, which includes a bracket 10, a camshaft 40, an adjustment arm 20 and a brake system. In the dynamic air chamber 30, the bracket 10 is provided with an inner end surface 101, an outer end surface opposite to the inner end surface 101, and a side surface 102 located at the periphery of the bracket 10. The brake shoes and the brake drum are installed inside the bracket 10 from the outer end surface of the bracket 10. , an avoidance groove 13 is set on the bracket 10, the avoidance groove 13 is roughly set at the position where the inner end face 101 and the side surface 102 are connected, and one end of the avoidance groove 13 extends to the inner end face 101 to form the first opening 131, and the other end is The second opening 132 is formed by extending to the side surface 102 . The camshaft 40 is mounted on the bracket 10 and is pivotally matched with the bracket 10 . At 101, the other end is provided with a cam that cooperates with the brake shoe to drive the brake shoe to swing; the adjusting arm 20 is set at a position located on the inner side of the inner end face 101 of the bracket 10, and it is set against the inner side 101 as much as possible, and the adjusting arm 40 includes a first end 21 connected with the camshaft 40, and a second end 22 away from the first end 21, the first end 21 is provided with a connecting hole for the camshaft 40 to penetrate, the surface of the camshaft 40 and the hole The inner wall of the bracket 10 is respectively provided with key grooves, so that the camshaft 40 can rotate synchronously with the first end of the adjustment arm 20, the second end 22 of the adjustment arm 20 is placed at the side 102 of the bracket 10, and the second end 22 is located at Between the inner end face 101 and the outer end face of the bracket 10, the part of the adjusting arm 20 between the first end 21 and the second end 22 is accommodated in the escape groove 13, that is, the first end 21 of the adjusting arm 20 and the The two ends 22 are offset by a certain distance in the axial direction of the bracket 10 , the main part of the adjusting arm 20 is placed in the avoidance groove 13 , and the first end 21 of the adjustment arm 20 is passed through the first opening 131 of the avoidance groove 13 at the inner end surface 101 Connected to the camshaft 40 , the second end 22 passes through the second opening 132 of the escape groove 13 , so that the second end 22 can be located between the inner end surface 101 and the outer end surface of the bracket 10 . The above-mentioned brake air chamber 30 is installed on the bracket 10 , and the push rod 31 of the brake air chamber 30 is connected to the second end 22 of the adjustment arm 20 .

In the present invention, the adjusting arm is placed at the inner end face of the bracket so that its first end is connected with the camshaft at the inner end face of the bracket, so as to meet the braking requirements of the vehicle. The second end connected with the brake air chamber is located between the inner end face and the outer end face of the bracket to prevent the brake air chamber from occupying the space inside the inner end face of the bracket, thereby preventing the brake air chamber from occupying the interior space of the vehicle.

In a preferred embodiment, according to the present invention, a recess 12 is provided on the inner end surface 101 of the bracket 10 , and a shaft hole 15 is provided on the bracket 10 , and the shaft hole 15 faces the outer end surface of the bracket 10 from the bottom surface of the recess 12 . extending, the camshaft 40 is threaded into the shaft hole 15 , the first opening 131 of the escape groove 13 is communicated with the concave position 12 , the first end 21 of the adjusting arm 20 is accommodated in the concave position 12 , and is in the concave position 12 In the process, the first end 21 of the adjusting arm 20 is connected to the camshaft 40, so that the installation position of the first end 21 of the adjusting arm 20 is moved a certain distance toward the outer end surface of the bracket 10, which reduces the adjustment The arm 20 protrudes from the height of the inner end surface 101 of the bracket 10 , which avoids the adjustment arm 20 from occupying the interior space of the vehicle.

In order to ensure the strength of the bracket 10 , the bracket 10 is provided with connecting ribs 14 connected between the two sides of the escape groove 13 , and the escape groove 13 on the bracket 10 is reinforced by the connecting ribs 14 . After passing through the second opening 132 of the escape groove 13, the two ends 22 are located on the side of the connecting rib 14 away from the inner end surface 101. The connecting rib 14 is used to define the position of the adjusting arm 20, and the connecting rib 14 is used to adjust the adjustment The arm acts as a protection.

In the above solution, the first end 21 of the adjusting arm 20 is connected to the camshaft 40 at the inner end surface 101, and the second end 22 is connected to the brake gas at the position between the inner end surface 101 and the outer end surface on the side surface 102. The push rod 31 of the chamber 30 is connected, that is to say, the first end 21 and the second end 22 of the adjusting arm 20 are offset from each other by a certain distance in the axial direction of the bracket 10 . The bending part 201 and the second bending part 202, wherein the first bending part 201 is bent from the first end 21 toward the escape groove 13, so that the adjusting arm 20 can be accommodated in the escape groove 13, and the second bending part The folded portion 202 is folded outward along the radial direction of the bracket 10 from the side of the first folded portion 201 away from the first end 21 . At the end, in this way, the first end 21 and the second end 22 are staggered by a certain distance along the axial direction of the bracket 10, so that after the push rod 31 of the brake air chamber 30 is connected with the second end 22, the brake The height of the dynamic air chamber 30 protruding from the inner end surface 101 is as small as possible, and even not protruding from the inner end surface 101 .

In other embodiments of the present invention, a mounting bracket 32 is fixed on the side surface 102 of the bracket 10 . The mounting bracket 32 can be fixed on the bracket 10 by bolting or welding, and the brake air chamber 30 is fixed. On the mounting frame 32; a mounting surface is provided on the mounting frame 32, a through groove 321 is provided on the mounting surface, the front end face of the brake air chamber 30 is fixed on the mounting surface by bolting, and the push rod 31 is fixed on the mounting surface by the brake air chamber The front end surface of 30 protrudes and is connected with the second end 22 of the adjusting arm 20 after passing through the through slot 321 .

The electric drive axle of the present invention includes the above-mentioned braking system, and other structures of the electric drive axle are the same as or similar to those in the prior art, and will not be repeated here.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it is still possible to understand the technical solutions of the foregoing embodiments. The recorded technical solutions are modified, or some technical features thereof are equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A braking system is characterized in that it includes a bracket, a camshaft, an adjustment arm and a brake air chamber;

The bracket is provided with an inner end surface, an outer end surface opposite to the inner end surface, and a side surface located at the periphery of the bracket, and an avoidance groove is arranged on the bracket, and the avoidance groove forms a first opening on the inner end surface and a second opening on the side surface;

The camshaft is pivotally connected to the bracket;

The adjustment arm is located on the inner side of the inner end face of the bracket, and includes a first end connected with the camshaft and a second end away from the first end, the parts of the adjustment arm located at the first end and the second end are placed in the escape groove and the second end is the end is located between the inner end face and the outer end face of the bracket;

The brake air chamber is mounted on the bracket, and the push rod of the brake air chamber is connected to the second end of the adjusting arm.
The braking system as claimed in claim 1, wherein a recess is provided on the inner end surface of the bracket, a shaft hole extending from the bottom surface of the recess toward the outer end surface is arranged on the bracket, and the camshaft passes through the shaft In the hole, the first opening of the escape groove communicates with the concave position, and the first end of the adjusting arm is accommodated in the concave position and connected with the camshaft.
The braking system according to claim 1, wherein the bracket is provided with connecting ribs connected between two sides of the avoidance groove.
The braking system of claim 3, wherein the second end of the adjusting arm is located on the side of the connecting rib away from the inner end surface.
The braking system according to claim 1, wherein the adjusting arm is provided with a first bent portion bent from the first end toward the escape groove, and a side away from the first end from the first bent portion The second bending portion is bent outward in the radial direction of the bracket.
The braking system according to claim 1, wherein a mounting frame is fixed on the side of the bracket, and the brake air chamber is fixed on the mounting frame.
The braking system according to claim 6, wherein a mounting surface is provided on the bracket, a through groove is provided on the mounting surface, the front end surface of the brake air chamber is fitted and fixed on the mounting surface, and the push rod is fixed by the brake air The front end face of the chamber protrudes and is connected to the second end of the adjustment arm after passing through the through slot.
An electric drive axle is characterized in that it comprises the braking system according to any one of claims 1-7.