CN215521744U

CN215521744U - Active return spring for reducing drag torque of brake caliper

Info

Publication number: CN215521744U
Application number: CN202121795865.3U
Authority: CN
Inventors: 李涛; 李丛芳
Original assignee: Hubei Tongxin Engine Co ltd
Current assignee: Hubei Tongxin Engine Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-01-14
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses an active return spring for reducing drag torque of a brake caliper, which comprises a connecting shell, a brake drum, a rotating rod, a brake shoe, a friction lining, a cam and a rotating shaft, wherein the connecting shell is sleeved at the top of the brake drum, the brake shoes are symmetrically arranged in the brake drum, the rotating rod is embedded and fixed in one end of each brake shoe, the bottom ends of the rotating rods are rotatably connected with the inner wall of one side corresponding to the brake drum through bearings, the brake shoe can be quickly returned to the original position through more contraction of a limiting spring in a return mechanism compared with a spring directly connected with the limiting spring, the service life of the brake shoe is prolonged, noise generated by friction between the brake shoe and the brake disc during slow return is avoided, an elastic rod is arranged in the brake drum and can be bent and deformed during rotation of the brake shoe, the brake shoe can be returned to the original position under the elastic potential energy when the brake is released, and forms multi-layer return protection with the return mechanism, the brake pad is more rapid and convenient to reset.

Description

Active return spring for reducing drag torque of brake caliper

Technical Field

The utility model relates to the technical field of brake calipers, in particular to an active return spring for reducing drag torque of a brake caliper.

Background

The brake caliper has the working principle that after a brake pedal is stepped, brake fluid is transmitted into the brake caliper through a main cylinder and a pipeline, so that a brake shoe rubs the inside of a brake drum to achieve the purpose of friction deceleration, and a brake torque is generated to decelerate or stop a vehicle; when the brake pedal is released, the hydraulic pressure in the brake caliper is immediately released, the force of the brake pad for clamping the brake disc is immediately disappeared, and the wheel can rotate again. The common brake block is separated under the rotation of the brake disc, and the brake block with the return spring can quickly return the brake block. The active return of the brake pad not only reduces the dragging torque of the real vehicle, but also helps the brake noise, brake shake, the service life of the brake pad and the like. Therefore, more and more brakes with the active return structure of the brake pad are provided.

The return springs have the effect of enabling the brake pad to return to the original position rapidly, the brake shoes on two sides inside the brake drum are connected among the return springs, the distance is short when deformation is conducted, therefore, energy storage generated by deformation is small, the brake pad is easy to reset slowly, noise is generated when braking is conducted, abrasion of the brake pad is accelerated, the service life of the brake pad is shortened, and therefore the active return spring for reducing drag torque of the brake caliper is provided.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an active return spring for reducing the brake caliper drag torque to solve the above-mentioned problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: the active return spring comprises a connecting shell, a brake drum, a rotating rod, brake shoes, friction linings, a cam and a rotating shaft, wherein the connecting shell is sleeved at the top of the brake drum, the brake shoes are symmetrically arranged in the brake drum, the rotating rod is fixedly embedded in one end of each brake shoe, the bottom end of the rotating rod is rotatably connected with the inner wall of one side corresponding to the brake drum through a bearing, the friction linings are fixedly connected to one side opposite to the brake shoes, the rotating shaft is rotatably connected to the inside of the brake drum through the bearing, the cam is fixedly connected to the top end of the rotating shaft, and a reset mechanism is arranged in the brake drum.

Preferably, canceling release mechanical system includes slide bar, slider, slide cartridge, spacing spring and gag lever post, the inside slide bar that is equipped with of brake drum, the slide bar both ends respectively with the brake shoe sliding connection who corresponds, slide bar outside symmetry cover has the slide cartridge, and the slide cartridge all with slide bar sliding connection, slide bar outside cover has spacing spring, through spacing spring elastic connection between the slide cartridge, slide cartridge top and bottom all are connected with the gag lever post through the pin rotation, the one end that the slide cartridge was kept away from to the gag lever post all is connected through pin and the brake shoe rotation that corresponds.

Preferably, through holes are formed in the centers of the tops of the brake drum and the connecting shell.

Preferably, round holes are formed in the center of the top of the connecting shell and the brake drum at equal intervals and equal angles.

Preferably, the bottom end of the rotating shaft is fixedly connected with a linkage rod.

Preferably, the inside elastic rod that is equipped with of brake drum, elastic rod both ends respectively with the one end fixed connection who corresponds the brake drum, the symmetrical cover in elastic rod outside has the L shaped plate, L shaped plate bottom all with corresponding brake shoe fixed connection.

Preferably, the bottom of each brake shoe is provided with a bearing block, the bottom of each bearing block is fixedly connected with a bearing spring, and each bearing block is elastically connected with the brake drum through the corresponding bearing spring.

Preferably, the sliding grooves are formed in one side, opposite to the brake drum, of the brake drum, the sliding blocks are fixedly connected to the two ends of each sliding rod, and the sliding blocks are connected with the corresponding sliding grooves in a sliding mode.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model can rapidly return the brake shoe by the limit spring in the return mechanism which is more than the limit spring in the direct connection, reduce the abrasion of the brake pad, prolong the service life of the brake pad and avoid the noise generated by the friction between the brake pad and the brake disc when the return is slow.

2. The brake drum is internally provided with the elastic rod which can be bent and deformed when the brake shoe rotates, the brake shoe can return under the elastic potential energy when the brake is released, and the brake drum and the resetting mechanism form multi-layer resetting protection, so that the brake pad is more rapid and convenient to reset.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the brake drum of the present invention;

FIG. 3 is a schematic structural view of the reset mechanism of the present invention;

FIG. 4 is a schematic view of a brake shoe according to the present invention;

FIG. 5 is a schematic view of a brake drum according to the present invention.

In the figure: 1. a connecting shell; 2. a brake drum; 3. a through hole; 4. a circular hole; 5. a linkage rod; 6. a rotating rod; 7. a brake shoe; 8. a friction lining; 9. a reset mechanism; 10. a cam; 11. an L-shaped plate; 12. an elastic rod; 13. a rotating shaft; 14. a receiving spring; 15. a bearing block; 91. a slide bar; 92. a slider; 93. a slide cylinder; 94. a limiting spring; 95. a limiting rod; 96. a chute.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, the active return spring for reducing drag torque of a brake caliper in the drawings comprises a connecting shell 1, a brake drum 2, a rotating rod 6, brake shoes 7, friction linings 8, a cam 10 and a rotating shaft 13, wherein the connecting shell 1 is sleeved at the top of the brake drum 2, the brake shoes 7 are symmetrically arranged in the brake drum 2, the rotating rod 6 is embedded and fixed in one end of each brake shoe 7, the bottom ends of the rotating rods 6 are rotatably connected with the inner wall of one side corresponding to the brake drum 2 through bearings, the friction linings 8 are fixedly connected to the opposite side of each brake shoe 7, the rotating shaft 13 is rotatably connected to the inside of the brake drum 2 through bearings, the cam 10 is fixedly connected to the top end of the rotating shaft 13, and a return mechanism 9 is installed in the brake drum 2.

When braking, the linkage rod 5 drives the rotating shaft 13 to rotate, when the cam 10 at the end part of the rotating shaft 13 rotates, the brake shoes 7 are separated from each other and rotate along the rotating rod 6, thereby the friction lining 8 is close to the brake disc, the brake pad is attached to the brake disc for friction deceleration, thereby the vehicle speed is reduced for braking, after release, the spring can be retracted more by a limiting spring 94 in the return mechanism 9, than by a directly connected spring, the brake shoe 7 can be quickly returned, the abrasion of the brake pad is reduced, the service life of the brake pad is prolonged, the noise generated by the friction between the brake pad and the brake disc when the return is slow is avoided, the elastic rod 12 is arranged in the brake drum 2 and can be bent and deformed when the brake shoe 7 rotates, when the brake is released, the brake shoe 7 is returned under elastic potential energy, and forms multi-layer reset protection with the reset mechanism 9, so that the brake pad is more rapid and convenient to reset.

Referring to fig. 2, 3 and 4, the reset mechanism 9 includes a slide bar 91, a slide block 92, a slide cylinder 93, a limiting spring 94 and a limiting rod 95, the slide bar 91 is disposed inside the brake drum 2, two ends of the slide bar 91 are respectively slidably connected to the corresponding brake shoes 7, the slide cylinders 93 are symmetrically sleeved outside the slide bar 91, the slide cylinders 93 are slidably connected to the slide bar 91, the limiting spring 94 is sleeved outside the slide bar 91, the slide cylinders 93 are elastically connected to each other through the limiting spring 94, the top and the bottom of each slide cylinder 93 are rotatably connected to the limiting rod 95 through a pin, and one end of each limiting rod 95, which is far away from the slide cylinder 93, is rotatably connected to the corresponding brake shoe 7 through a pin.

The pivoted brake shoe 7 separates each other, lets the tip of slide bar 91 slide along spout 96, is close to cam 10, and the gag lever post 95 both ends of slide bar 91 both sides rotate respectively when sliding, can extrude slide cartridge 93 and be close to each other, and extrusion limiting spring 94 takes place the deformation, and for the distance of the spring shrink of lug connection, limiting spring 94 is because of the distance of extrusion shrink can be more to the brake block can return fast after the brake, and the reducing wear.

Referring to fig. 1 and 2, through holes 3 are formed in the centers of the tops of the brake drum 2 and the connecting shell 1, so that screws and the like can conveniently penetrate through the through holes for connection and fixation.

Referring to fig. 1 and 2, circular holes 4 are formed in the centers of the tops of the connecting shell 1 and the brake drum 2 at equal intervals and equal angles, so that the connecting shell can be conveniently connected with a rotating shaft 13 and other parts.

Referring to fig. 2 and 3, the bottom end of the rotating shaft 13 is fixedly connected with a linkage rod 5, so as to be conveniently connected with other components, and the rotating shaft 13 is driven to rotate by the linkage rod 5.

Referring to fig. 2 and 3, an elastic rod 12 is arranged inside the brake drum 2, two ends of the elastic rod 12 are respectively and fixedly connected with one end of the corresponding brake drum 2, L-shaped plates 11 are symmetrically sleeved outside the elastic rod 12, the bottoms of the L-shaped plates 11 are respectively and fixedly connected with the corresponding brake shoes 7, the elastic rod 12 deforms when the brake shoes 7 rotate, and the brake shoes 7 return when the brake shoes 7 are loosened.

Referring to fig. 5, the bottom of each brake shoe 7 is provided with a receiving block 15, the bottom of each receiving block 15 is fixedly connected with a receiving spring 14, and each receiving block 15 is elastically connected with the brake drum 2 through the corresponding receiving spring 14 to support the brake shoe 7 in an auxiliary manner.

Referring to fig. 3 and 4, sliding grooves 96 are formed in opposite sides of the brake drum 2, sliding blocks 92 are fixedly connected to both ends of the sliding rod 91, and the sliding blocks 92 are slidably connected to the corresponding sliding grooves 96, so that both ends of the sliding rod 91 can horizontally slide along the sliding grooves 96.

The working principle is as follows: when braking, the linkage rod 5 drives the rotating shaft 13 to rotate, the cam 10 at the end part of the rotating shaft 13 rotates to separate the brake shoes 7 from each other, the brake shoes rotate along the rotating rod 6, so that the friction linings 8 are close to the brake disc, the brake pads are attached to the brake disc to perform friction deceleration, so that the vehicle speed is reduced, the brake is braked, the rotating brake shoes 7 are separated from each other, the end part of the sliding rod 91 slides along the sliding groove 96 and is close to the cam 10, two ends of the limiting rod 95 at two sides of the sliding rod 91 respectively rotate during sliding, the sliding cylinder 93 can be extruded to be close to each other, the limiting spring 94 is extruded to deform, compared with the contraction distance of the directly connected spring, the distance of the limiting spring 94 due to extrusion contraction is more, so that the brake pads can be quickly returned after braking, the abrasion is reduced, after loosening, the limiting spring 94 in the resetting mechanism 9 can be used for more spring contraction of the directly connected spring, the brake shoe 7 can be rapidly returned, the abrasion of the brake pad is reduced, the service life of the brake pad is prolonged, the noise generated by friction between the brake pad and a brake disc when the return is slow is avoided, the elastic rod 12 is further arranged in the brake drum 2 and can be bent and deformed when the brake shoe 7 rotates, the brake shoe 7 is returned under the elastic potential energy when the brake is loosened, the multi-layer reset protection is formed by the elastic rod and the reset mechanism 9, and the brake pad is more rapidly and conveniently reset.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an initiative return spring for reducing braking pincers dragging moment, includes connecting shell (1), brake drum (2), bull stick (6), brake shoe (7), friction lining (8), cam (10) and pivot (13), brake drum (2) top cover has connecting shell (1), brake drum (2) inside symmetry is equipped with brake shoe (7), inside equal embedding of brake shoe (7) one end is fixed with bull stick (6), one side inner wall that bull stick (6) bottom all corresponds with brake drum (2) through the bearing rotates and is connected, the equal fixedly connected with friction lining (8) of one side that brake shoe (7) is relative, inside bearing rotation connection has pivot (13) through brake drum (2), pivot (13) top fixedly connected with cam (10), its characterized in that: and a reset mechanism (9) is arranged in the brake drum (2).

2. A positive return spring for reducing brake caliper drag torque according to claim 1, wherein: reset mechanism (9) include slide bar (91), slider (92), slide cartridge (93), spacing spring (94) and gag lever post (95), inside slide bar (91) that is equipped with of brake drum (2), slide bar (91) both ends respectively with corresponding brake shoe (7) sliding connection, slide bar (91) outside symmetry cover has slide cartridge (93), and slide cartridge (93) all with slide bar (91) sliding connection, slide bar (91) outside cover has spacing spring (94), through spacing spring (94) elastic connection between slide cartridge (93), slide cartridge (93) top and bottom all are connected with gag lever post (95) through the pin rotation, the one end that slide cartridge (93) were kept away from in gag lever post (95) all rotates through pin and corresponding brake shoe (7) and is connected.

3. A positive return spring for reducing brake caliper drag torque according to claim 1, wherein: through holes (3) are formed in the centers of the tops of the brake drum (2) and the connecting shell (1).

4. A positive return spring for reducing brake caliper drag torque according to claim 1, wherein: round holes (4) are formed in the center of the tops of the connecting shell (1) and the brake drum (2) at equal distances and at equal angles.

5. A positive return spring for reducing brake caliper drag torque according to claim 1, wherein: the bottom end of the rotating shaft (13) is fixedly connected with a linkage rod (5).

6. A positive return spring for reducing brake caliper drag torque according to claim 1, wherein: brake drum (2) inside is equipped with elastic rod (12), elastic rod (12) both ends respectively with the one end fixed connection who corresponds brake drum (2), elastic rod (12) outside symmetrical cover has L shaped plate (11), L shaped plate (11) bottom all with corresponding brake shoe (7) fixed connection.

7. A positive return spring for reducing brake caliper drag torque according to claim 1, wherein: the brake shoe (7) bottom all is equipped with and accepts piece (15), the equal fixedly connected with of accepting spring (14) in accepting piece (15) bottom, accepting piece (15) all through corresponding accepting spring (14) and brake drum (2) elastic connection.

8. A positive return spring for reducing brake caliper drag torque according to claim 2, wherein: the opposite side of brake drum (2) has all seted up spout (96), slide bar (91) both ends equal fixedly connected with slider (92), slider (92) all with corresponding spout (96) sliding connection.