CN211501401U - Simple Cable Parking Brake - Google Patents

Abstract

The utility model relates to a simple cable parking brake, comprising a brake base plate, arc-shaped brake shoes are symmetrically arranged on both sides of the front end surface of the brake base plate, a pull arm is installed in the interval between the brake base plate and one of the brake shoes, and the pull arm The top is connected with the brake shoe through a pin shaft, and a support plate is clamped between the pull arm and the other brake shoe; the pull cable assembly is hung at the bottom of the pull arm, and the brake bottom plate is bulged forward to form a boss. There is an inclined hole on the brake base plate adjacent to the boss; the end of the cable assembly extends to the rear of the brake base plate through the guide of the boss and the inclined hole in turn; the top of the brake base plate located at the gap between the two brake shoes is installed The rotating shaft; the pull arm is pulled by the pull cable and transmitted to the two brake shoes, the brake shoes are opened to both sides and fit with the friction plate to realize braking; the utility model makes the pull arm only receive effective The pulling force greatly improves the mechanical transmission efficiency, prolongs the service life of the brake, and optimizes the structure at the fulcrum between the cable assembly and the brake base plate.

Description

Simple Cable Parking Brake

technical field

The utility model relates to the technical field of vehicle brakes, in particular to a simple cable parking brake.

Background technique

With the encouragement of national policies and the continuous breakthrough of new energy technologies, the market application of electric drive commercial vehicles has become increasingly mature and favored by customers. Compared with traditional fuel power, the new energy vehicle directly arranges the drive motor at the power axle end or wheel end to improve the transmission efficiency. Axle-end or wheel-end motors require a more compact axle structure, especially the axle-end drive, which requires the arrangement of the parking brake in the compact space of the motor and reducer.

The parking drum brake realizes mechanical parking by pulling the pull arm by the pull cable, and the effective motion trajectory after the pull arm is pulled is to rotate around the plane of the brake end face. In the prior art, the pull cable mechanism and the brake end face are limited by the structure of the brake itself The plane protrudes at a certain angle, resulting in an angle between the force on the pull arm and the plane of the brake end face, that is, the pull arm is not only subjected to the effective plane rotation force, but also receives a perpendicular component force, which greatly affects the mechanical transmission efficiency. , the pull arm is frequently subjected to invalid axial component force, which also greatly affects the overall service life of the brake.

In the prior art, the cable fixing point of the parking drum brake is fastened by a fixing bracket welded on the brake base plate, so as to realize the support for the cable mechanism. The increase of the fixing bracket increases the space profile of the brake, which is contrary to the requirement of compactness and is not conducive to the flexible layout of the parking brake.

Utility model content

Aiming at the shortcomings of the above-mentioned existing production technology, the applicant provides a simple cable parking brake with a reasonable structure, so that the height of the cable assembly is equal to that of the pull arm, so that the pull arm only receives the effective pulling force of rotation, greatly reducing the The mechanical transmission efficiency is improved, the service life of the brake is prolonged, and the structure optimization cost is low and the effect is obvious.

The technical scheme adopted by the utility model is as follows:

A simple cable parking brake includes a brake base plate, arc-shaped brake shoes are symmetrically arranged on both sides of the front end surface of the brake base plate, and a space between the brake base plate and one of the brake shoes is installed with a brake shoe. Pull arm, the top of the pull arm is connected with the brake shoe through a pin shaft, and a support plate is clamped between the pull arm and another brake shoe; the bottom of the pull arm is hung with a pull cable assembly, The brake base plate located outside the bottom end of the pull arm bulges forward to form a boss, and the brake base plate adjacent to the boss has an oblique hole; one end of the pull cable assembly is hung with the pull arm, and the other end of the pull cable assembly It extends to the rear of the brake base plate through the guide of the boss and the inclined hole in turn; a rotating shaft is installed on the top of the brake base plate at the gap between the two brake shoes.

As a further improvement of the above technical solution:

The cable assembly is supported by the boss, so that the cable assembly between the boss and the pull arm is parallel to the brake base plate.

A groove is formed on the boss along the direction of the cable assembly, and the cable assembly is embedded in the groove; the groove is connected with the inclined hole.

The structure of the cable assembly is as follows: including a fixed joint, a cable is installed through the fixed joint, a square-shaped clip sleeve is installed at the end of the cable, and the clip sleeve is hung with the pull arm; the fixed joint It extends into the inclined hole from the rear of the brake base plate, and the fixed joint is fixed to the brake base plate through a nut.

Two ends of the support plate are respectively provided with concave clamping grooves; a small spring is also installed between the support plate and the pull arm.

The bottom end of the pull arm is extended with an outward hook, and the hook is engaged with the pull cable assembly.

Large springs are installed between the two brake shoes and the rotating shaft.

Both the tops of the two brake shoes are provided with an arc-shaped structure matched with the rotating shaft, and the brake shoes oscillate around the rotating shaft.

Between the bottoms of the two brake shoes, a return spring and a self-adjusting top rod are installed axially parallel to each other, and a ratchet wheel matched with the return spring is installed in the middle of the self-adjusting top rod.

The beneficial effects of the present utility model are as follows:

The utility model has a compact and reasonable structure and is convenient to operate. By punching a boss and an oblique hole on the brake base plate, and setting a groove matching the pull cable on the boss, the pull cable can pull the pull arm in the process of pulling the pull arm. It is only subjected to the pulling force parallel to the plane of the front end face of the brake base plate and rotates at the center of the pin shaft, which greatly improves the mechanical transmission efficiency and prolongs the service life; the cable assembly is fixed to the inclined hole of the brake base plate through the fixed joint, replacing The fixed bracket in the prior art is used, and the structure optimization of the brake is realized, so as to match the new energy vehicle, and the parking brake can be arranged more flexibly and conveniently in an effective space structure.

The utility model also includes the following advantages:

The boss is provided with a groove along the direction of the cable assembly, and the groove plays a guiding role in the pulling process of the cable;

The height of the boss is equal to the height of the plane where the pull arm is located, so that the cable above the boss only exerts an effective braking force on the pull arm;

The inclined hole is connected with the boss and the groove, so that the cable can smoothly run through the front and rear ends of the brake base plate; the fixed joint on the cable is fixed to the brake base plate through a nut, which is convenient for disassembly and maintenance, and the fixed joint becomes a fixed part of the outer end of the cable pivot.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1 .

FIG. 3 is an exploded view of FIG. 1 .

FIG. 4 is a partial enlarged view of part B in FIG. 3 .

FIG. 5 is a schematic structural diagram of the cable assembly of the present invention.

Among them: 1. Rotating shaft; 2. Small spring; 3. Support plate; 4. Large spring; 5. Brake base plate; 6. Brake shoe; 7. Pin shaft; 8. Pull arm; 9. Return spring; 10 , Self-adjusting ejector rod; 11, cable assembly; 12, nut; 31, card slot; 51, boss; 52, groove; 53, inclined hole; 111, fixed joint; 112, cable; 113, card set; 81, hook.

Detailed ways

The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in Fig. 1, Fig. 2 and Fig. 3, the simple cable parking brake of this embodiment includes a brake base plate 5, and arc-shaped brake shoes 6 are symmetrically arranged on both sides of the front end surface of the brake base plate 5, A pull arm 8 is installed in the interval between the brake base plate 5 and one of the brake shoes 6, the top of the pull arm 8 is connected with the brake shoe 6 through the pin shaft 7, and the pull arm 8 is connected with the other brake shoe 6. The support plate 3 is clamped between them; the cable assembly 11 is hung at the bottom of the pull arm 8 , and the brake base plate 5 located on the outer side of the bottom end of the pull arm 8 bulges forward to form a boss 51 , which is close to the brake of the boss 51 . The bottom plate 5 is provided with an oblique hole 53; one end of the cable assembly 11 is hooked to the pull arm 8, and the other end of the cable assembly 11 extends to the rear of the brake bottom plate 5 through the guide of the boss 51 and the oblique hole 53 in turn; A rotating shaft 1 is installed on the top end of the brake base plate 5 at the clearance of each brake shoe 6 .

The cable assembly 11 is supported by the boss 51 , so that the cable assembly 11 located between the boss 51 and the pull arm 8 is parallel to the brake base plate 5 ; It is only subjected to the pulling force parallel to the plane of the front end surface of the brake base plate 5 so as to rotate at the center of the pin shaft 7, which greatly improves the mechanical transmission efficiency and prolongs the service life.

As shown in FIG. 4 , a groove 52 is formed on the boss 51 along the direction of the cable assembly 11 , the cable 112 of the cable assembly 11 is embedded in the groove 52 , and the groove 52 is pulled by the cable 112 In the process, it plays a guiding role; the groove 52 is connected with the inclined hole 53, so that the cable 112 can smoothly pass through the front and rear ends of the brake base plate 5.

As shown in FIG. 5 , the cable assembly 11 is structured as follows: including a fixed joint 111 , a cable 112 is installed through the fixed joint 111 , a square-shaped clip sleeve 113 is installed at the end of the cable 112 , the clip sleeve 113 and the pulling arm The hook 81 of 8 is mounted; the fixed joint 111 extends into the inclined hole 53 from the rear of the brake base plate 5, and the fixed joint 111 is fixed to the brake base plate 5 through the nut 12, which is convenient for disassembly and maintenance, and the fixed joint 111 becomes a cable A fixed fulcrum at the outer end of 112 replaces the fixed bracket in the prior art, and realizes the structural optimization of the brake, so as to match the new energy vehicle, and arrange the parking brake more flexibly and conveniently in the effective space structure.

The two ends of the support plate 3 are respectively provided with concave clamping grooves 31, and the clamping grooves 31 at both ends are respectively clamped with the pull arm 8 and the brake shoe 6 on the right side; Small spring 2, the small spring 2 is used to brake the reset of the rear pull arm 8.

The bottom end of the pull arm 8 extends outward with a hook 81 , and the hook 81 is engaged with the clip sleeve 113 of the cable assembly 11 .

A large spring 4 is installed between the two brake shoes 6 and the rotating shaft 1. When braking, the brake shoes 6 on both sides are opened to both sides with the rotating shaft 1 as the center of the circle. Reset of brake shoe 6.

The tops of the two brake shoes 6 are provided with arc structures matching with the rotating shaft 1 , and the brake shoes 6 swing with the rotating shaft 1 as the center.

Between the bottoms of the two brake shoes 6 are installed a return spring 9 and a self-adjusting top rod 10 , which are axially parallel to each other.

The working principle of the utility model is:

Pull the cable 112, the pull arm 8 is pulled, and the force is transmitted to the brake shoe 6 on the right side through the support plate 3. The brake shoe 6 opens to the outside and fits with the friction plate, and then reversely applies the force. Force on the support plate 3, the support plate 3 exerts force on the pull arm 8 and the left brake shoe 6, and the left brake shoe 6 rotates outward relative to the pull arm 8 with the pin 7 as the center of the circle, To achieve braking.

The utility model has a simple and ingenious structure, realizes the optimization of the brake structure, improves the force of the pull arm through the boss, and further improves the mechanical transmission efficiency and service life.

The above description is an explanation of the present utility model, not a limitation of the utility model. For the limited scope of the present utility model, refer to the claims, and any form of modification can be made within the protection scope of the present utility model.

Claims (9)

1. The utility model provides a simple and easy cable parking brake, includes braking bottom plate (5), terminal surface bilateral symmetry has circular-arc brake shoe (6), its characterized in that before braking bottom plate (5): a pull arm (8) is arranged in a gap between the brake bottom plate (5) and one brake shoe (6), the top of the pull arm (8) is rotatably connected with the brake shoe (6) through a pin shaft (7), and a support plate (3) is clamped between the pull arm (8) and the other brake shoe (6); the bottom of the pull arm (8) is hung with a cable assembly (11), the brake bottom plate (5) positioned outside the bottom end of the pull arm (8) is bulged forwards to form a boss (51), and an inclined hole (53) is formed on the brake bottom plate (5) adjacent to the boss (51); one end of the inhaul cable assembly (11) is hung with the pull arm (8), and the other end of the inhaul cable assembly (11) extends to the back of the brake bottom plate (5) through the guide of the boss (51) and the inclined hole (53) in sequence; the rotating shaft (1) is arranged at the top end of the braking bottom plate (5) positioned at the gap of the two braking shoes (6).

2. The simple cable parking brake of claim 1, wherein: the cable assembly (11) is supported by the boss (51), so that the cable assembly (11) between the boss (51) and the pull arm (8) is parallel to the brake bottom plate (5).

3. The simple cable parking brake of claim 1 or 2, characterized in that: a groove (52) is formed in the boss (51) along the direction of the cable assembly (11), and the cable assembly (11) is embedded in the groove (52); the groove (52) is connected with the inclined hole (53).

4. The simple cable parking brake of claim 1 or 2, characterized in that: the structure of the inhaul cable assembly (11) is as follows: the pull rod comprises a fixed joint (111), wherein a pull cable (112) is installed through the fixed joint (111), a clamping sleeve (113) with a square structure is installed at the end of the pull cable (112), and the clamping sleeve (113) is hung on a pull arm (8); the fixed joint (111) extends into the inclined hole (53) from the back of the brake bottom plate (5), and the fixed joint (111) is fixedly mounted with the brake bottom plate (5) through a nut (12).

5. The simple cable parking brake of claim 1, wherein: two ends of the support plate (3) are respectively provided with an inwards concave clamping groove (31); and a small spring (2) is also arranged between the support plate (3) and the pull arm (8).

6. The simple cable parking brake of claim 1, wherein: the bottom end of the pull arm (8) extends to form an outward hook (81), and the hook (81) is clamped with the inhaul cable assembly (11).

7. The simple cable parking brake of claim 1, wherein: big springs (4) are arranged between the two brake shoes (6) and the rotating shaft (1).

8. The simple cable parking brake of claim 1, wherein: the tops of the two brake shoes (6) are provided with arc structures matched with the rotating shaft (1), and the brake shoes (6) swing by taking the rotating shaft (1) as a center.

9. The simple cable parking brake of claim 1, wherein: a reset spring (9) and a self-adjusting ejector rod (10) which are axially parallel to each other are arranged between the bottoms of the two brake shoes (6), and a ratchet wheel matched with the reset spring (9) is arranged in the middle of the self-adjusting ejector rod (10).

Images