Braking system and electric drive axle

Abstract

The present invention discloses a braking system and an electric drive axle, wherein the braking system comprises a bracket, a camshaft, an adjusting arm, and a brake air chamber; the bracket is provided with an inner end face, an outer end face opposite to the inner end face, and a side face located at the periphery of the bracket, and a avoidance groove is provided on the bracket, wherein the avoidance groove forms a first opening on the inner end face and a second opening on the side face; the camshaft is pivotally connected to the bracket; the adjusting arm is located on the inner side of the inner end face of the bracket, and comprises a first end connected to the camshaft, and a second end away from the first end, and the portion of the adjusting arm located at the first end and the second end is placed in the avoidance groove, and the second end is located between the inner end face and the outer end face of the bracket; the brake air chamber is installed on the bracket, and the push rod of the brake air chamber is connected to the second end of the adjusting arm. The present invention meets the braking requirements of the vehicle and avoids the brake air chamber from occupying the internal space of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a braking system and an electric drive axle. Background Art

[0002] With the continuous development of new energy technologies, some vehicles gradually adopt electric drive systems to replace traditional fuel engines in order to achieve the purpose of energy conservation and environmental protection. For example, some buses and coaches have begun to use wheel hub motors as axles powered by them. Drum brakes are usually configured on these axles. The drum brakes include brake shoes, camshafts, adjustment arms and brake chambers. Among them, the brake shoes are installed in the bracket of the axle and are used to frictionally cooperate with the brake drum located in the bracket to provide braking force. The brake chamber pushes the adjustment arm to swing to drive the camshaft to move, and then drives the brake shoe to swing. Since the camshaft must be set axially of the axle and must be able to cooperate with the swing end of the brake shoe, at the same time, since the wheel hub motor needs to be installed on the outside of the bracket, the adjustment arm must be set on the inside of the bracket, and the push rod of the brake chamber needs to be connected to the adjustment arm. Since the push rod of the brake chamber is set at its center position, in order to connect the push rod of the brake chamber with the adjustment arm, at least a part of the brake chamber protrudes from the inner end face of the bracket. In this way, the brake chamber will occupy the internal space of the vehicle. Summary of the invention

[0003] The first object of the present invention is to provide a braking system which can avoid occupying the interior space of a vehicle while meeting the braking requirements.

[0004] A second object of the present invention is to provide an electric drive axle.

[0005] To achieve the above-mentioned purpose 1, the present invention adopts the following technical solution:

[0006] Braking system, including bracket, camshaft, adjusting arm and brake chamber;

[0007] The bracket is provided with an inner end face, an outer end face opposite to the inner end face, and a side face located at the periphery of the bracket, and a avoidance groove is provided on the bracket, the avoidance groove forms a first opening on the inner end face and a second opening on the side face;

[0008] The camshaft is pivotally connected to the bracket;

[0009] The adjusting arm is located inside the inner end surface of the bracket, and includes a first end connected to the camshaft and a second end away from the first end. The parts of the adjusting arm located at the first end and the second end are placed in the avoidance groove, and the second end is located between the inner end surface and the outer end surface of the bracket.

[0010] The brake air chamber is installed on the bracket, and the push rod of the brake air chamber is connected to the second end of the adjusting arm.

[0011] A recess is provided on the inner end surface of the bracket, and an axial hole is provided on the bracket extending from the bottom surface of the recess toward the outer end surface. The camshaft is inserted into the axial hole, the first opening of the avoidance groove is connected to the recess, and the first end of the adjustment arm is received in the recess and connected to the camshaft.

[0012] The bracket is provided with connecting ribs connected between the two sides of the avoidance groove.

[0013] The second end of the adjusting arm is located at a side of the connecting rib away from the inner end surface.

[0014] The adjusting arm is provided with a first bending portion bent from the first end toward the avoidance groove, and a second bending portion bent from a side of the first bending portion away from the first end toward the outside along the bracket radial direction.

[0015] A mounting frame is fixed on the side of the bracket, and the brake air chamber is fixed on the mounting frame.

[0016] The bracket is provided with a mounting surface, a through slot is provided on the mounting surface, the front end surface of the brake air chamber is fitted and fixed on the mounting surface, the push rod extends from the front end surface of the brake air chamber and is connected with the second end of the adjustment arm after passing through the through slot.

[0017] To achieve the above-mentioned second objective, the present invention adopts the following technical solution:

[0018] An electrically driven axle comprises the above-mentioned braking system.

[0019] The present invention places the adjusting arm at the inner end surface of the bracket so that its first end is connected to the camshaft at the inner end surface of the bracket, thereby meeting the braking requirements of the vehicle. At the same time, the adjusting arm is accommodated by the avoidance groove, and the second end of the adjusting arm connected to the brake air chamber is located between the inner end surface and the outer end surface of the bracket, thereby preventing the brake air chamber from encroaching on the space inside the inner end surface of the bracket, thereby preventing the brake air chamber from occupying the internal space of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is the installation schematic diagram of the present invention;

[0022] Figure 3 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0023] Below, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described:

[0024] like Figure 1 , 23, a braking system of the present invention is 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 air chamber 30. The bracket 10 is provided with an inner end face 101, an outer end face opposite to the inner end face 101, and a side face 102 located at the periphery of the bracket 10. The brake shoe and the brake drum are installed into the bracket 10 from the outer end face of the bracket 10. An avoidance groove 13 is provided on the bracket 10. The avoidance groove 13 is roughly arranged at the joint between the inner end face 101 and the side face 102. The position of the avoidance groove 13 is connected, and one end of the avoidance groove 13 extends to the inner end surface 101 to form a first opening 131, and the other end extends to the side surface 102 to form a second opening 132. The camshaft 40 is installed on the bracket 10 and pivotally cooperates with the bracket 10. The axial direction of the camshaft 40 is consistent with the axial direction of the bracket 10. One end of the camshaft 40 extends to the inner end surface 101 of the bracket 10, and the other end is provided with a cam that cooperates with the brake shoe to drive the brake shoe to swing; the adjustment arm 20 is arranged at a position located inside the inner end surface 101 of the bracket 10, and it is as close to the inner end surface 101 as possible. The adjusting arm 40 is arranged close to the inner side surface 101, and includes a first end 21 connected to 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, and the surface of the camshaft 40 and the inner wall of the hole are respectively provided with key grooves so that the camshaft 40 can rotate synchronously with the first end of the adjusting arm 20. The second end 22 of the adjusting arm 20 is placed at the side surface 102 of the bracket 10, and the second end 22 is located between the inner end surface 101 and the outer end surface of the bracket 10. The adjusting arm 20 The portion between the first end 21 and the second end 22 is accommodated in the avoidance groove 13, that is, the first end 21 and the second end 22 of the adjustment arm 20 are offset by a certain distance in the axial direction of the bracket 10, and the main part of the adjustment arm 20 is placed in the avoidance groove 13, and the first end 21 thereof passes through the first opening 131 of the avoidance groove 13 and is connected to the camshaft 40 at the inner end surface 101, and the second end 22 passes through the second opening 132 of the avoidance 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.

[0025] In the present invention, the adjusting arm is placed at the inner end surface of the bracket so that its first end is connected to the camshaft at the inner end surface of the bracket to meet the braking requirements of the vehicle. At the same time, the adjusting arm is accommodated by the avoidance groove, and the second end of the adjusting arm connected to the brake air chamber is located between the inner end surface and the outer end surface of the bracket, thereby preventing the brake air chamber from occupying the space inside the inner end surface of the bracket, thereby preventing the brake air chamber from occupying the internal space of the vehicle.

[0026] In a preferred embodiment, the present invention opens a recess 12 on the inner end surface 101 of the bracket 10, and sets an axial hole 15 on the bracket 10, the axial hole 15 extends from the bottom surface of the recess 12 to the outer end surface of the bracket 10, the camshaft 40 is inserted into the axial hole 15, the first opening 131 of the avoidance groove 13 is connected with the recess 12, the first end 21 of the adjusting arm 20 is received in the recess 12, and in the recess 12, the first end 21 of the adjusting arm 20 is connected to the camshaft 40, so that it is equivalent to moving the installation position of the first end 21 of the adjusting arm 20 toward the outer end surface of the bracket 10 by a certain distance, reducing the height of the adjusting arm 20 protruding from the inner end surface 101 of the bracket 10, and avoiding the adjustment arm 20 from crowding out the interior space of the vehicle.

[0027] In order to ensure the strength of the bracket 10, a connecting rib 14 connected between the two sides of the avoidance groove 13 is provided on the bracket 10, and the avoidance groove 13 on the bracket 10 is reinforced by the connecting rib 14. In addition, after the second end 22 of the adjusting arm 20 passes through the second opening 132 of the avoidance groove 13, it is located on the side of the connecting rib 14 away from the inner end surface 101. The position of the adjusting arm 20 is limited by the connecting rib 14, and the adjusting arm is protected by the connecting rib 14.

[0028] In the above scheme, 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 push rod 31 of the brake air chamber 30 at a position between the inner end surface 101 and the outer end surface on the side surface 102. That is to say, the first end 21 and the second end 22 of the adjusting arm 20 are staggered by a certain distance in the axial direction of the bracket 10. For this reason, the present invention provides a first bending portion 201 and a second bending portion 202 on the adjusting arm 20, wherein the first bending portion 201 is bent from the first end 21 toward the inside of the avoidance groove 13, so that the adjusting arm 20 The entire arm 20 can be accommodated in the avoidance groove 13, and the second bent portion 202 is bent outwardly along the radial direction of the bracket 10 from the side of the first bent portion 201 away from the first end 21, and the second end 22 is located at the end of the second bent portion 202 passing through the second opening 132 of the avoidance groove 13. In this way, the first end 21 and the second end 22 are staggered a certain distance along the axial direction of the bracket 10. In this way, after the push rod 31 of the brake air chamber 30 is connected to the second end 22, the height of the brake air chamber 30 protruding from the inner end surface 101 can be made as small as possible, or even not protrude from the inner end surface 101.

[0029] In other embodiments, the present invention has a mounting frame 32 fixed on the side 102 of the bracket 10, and the mounting frame 32 can be specifically fixed to 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, and a through groove 321 is opened on the mounting surface, and the front end surface of the brake air chamber 30 is fixed to the mounting surface by bolts, and the push rod 31 extends from the front end surface of the brake air chamber 30 and is connected to the second end 22 of the adjustment arm 20 after passing through the through groove 321.

[0030] The electric drive axle of the present invention includes the above-mentioned braking system. Other structures of the electric drive axle are the same as or similar to those in the prior art and are not described in detail here.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A braking system, characterized in that: Including bracket, camshaft, adjustment arm and brake air chamber; The bracket is provided with an inner end face, an outer end face opposite to the inner end face, and a side face located at the periphery of the bracket, and a avoidance groove is provided on the bracket, the avoidance groove forms a first opening on the inner end face and a second opening on the side face; The camshaft is pivotally connected to the bracket; The adjusting arm is located inside the inner end surface of the bracket, and includes a first end connected to the camshaft and a second end away from the first end. The parts of the adjusting arm located at the first end and the second end are placed in the avoidance groove, and the second end is located between the inner end surface and the outer end surface 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 adjustment arm; A recess is provided on the inner end surface of the bracket, and an axial hole is provided on the bracket extending from the bottom surface of the recess toward the outer end surface. The camshaft is inserted into the axial hole, the first opening of the avoidance groove is connected to the recess, and the first end of the adjustment arm is received in the recess and connected to the camshaft.

2. The braking system according to claim 1, characterized in that: The bracket is provided with connecting ribs connected between the two sides of the avoidance groove.

3. The braking system according to claim 2, characterized in that: The second end of the adjusting arm is located at a side of the connecting rib away from the inner end surface.

4. The braking system according to claim 1, characterized in that: The adjusting arm is provided with a first bending portion bent from the first end toward the avoidance groove, and a second bending portion bent from a side of the first bending portion away from the first end toward the outside along the bracket radial direction.

5. The braking system according to claim 1, characterized in that: A mounting frame is fixed on the side of the bracket, and the brake air chamber is fixed on the mounting frame.

6. The braking system according to claim 5, characterized in that The mounting frame is provided with a mounting surface, a through slot is provided on the mounting surface, the front end surface of the brake air chamber is fitted and fixed on the mounting surface, the push rod extends from the front end surface of the brake air chamber and is connected with the second end of the adjustment arm after passing through the through slot.

7. Electric drive axle, characterized in that: Comprising a braking system as described in any one of claims 1-6.

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