CN217234357U

CN217234357U - Combined type electron parking braking pincers assembly

Info

Publication number: CN217234357U
Application number: CN202220355265.3U
Authority: CN
Inventors: 林坚; 林孔境; 蔡运考; 郑瑞章
Original assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Current assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-08-19
Anticipated expiration: 2032-02-22

Abstract

The utility model relates to the field of brake calipers, and discloses a combined type electronic parking brake caliper assembly, which comprises an inner caliper body, an outer caliper body and a bracket, wherein a first piston cylinder for accommodating a first piston is arranged in the inner caliper body, and a claw part is arranged on the other side of the inner caliper body; a second piston cylinder used for accommodating a second piston is arranged in the outer clamp body and is communicated with the first piston cylinder through an oil duct; an inner friction plate and an outer friction plate are respectively arranged in the bracket, when braking is not applied, the inner friction plate and the outer friction plate are respectively positioned on the outer sides of the first piston and the second piston, and the claw part of the inner caliper body is positioned on the outer side of the outer friction plate; the clamp also comprises a driving assembly and a guiding driving part, wherein the driving assembly is arranged on one side of the inner clamp body. The utility model discloses a two side single piston structures, service brake and parking braking sharing a pair friction disc and piston, spare part is less, simple structure owing to adopt the split type structure of the pincers body and support, has further reduced the processing cost.

Description

Combined type electron parking braking pincers assembly

Technical Field

The utility model relates to a braking pincers field especially relates to a combined type electron parking braking pincers assembly.

Background

Electronic Parking epb (electrical Parking brake) refers to a technology for realizing Parking brake by an electronic control mode. The electronic hand brake is a technology for realizing parking brake in an electronic control mode. The electronic hand brake is a technology for realizing parking brake in an electronic control mode. The working principle of the brake is the same as that of a mechanical hand brake, and the brake shoe of the rear wheel is tensioned by a stay cable to brake. The other type is to use an electronic mechanical caliper to control parking brake by clamping a brake pad through a motor.

The existing fixed electronic parking brake caliper assembly generally adopts an integral type and double-side multi-piston structure, related parts such as a service brake piston and a service brake friction plate which need service brake during service brake, and related parts such as a parking brake piston and a parking brake friction plate which need parking brake during parking brake, and the service brake structure and the parking brake structure are independent in structure, more parts are needed, the structure is complex, and the cost is high; the brake caliper assembly integrating service braking and parking braking is also available, but the service braking effect cannot be guaranteed, and the integrated brake caliper assembly has the trouble of difficult maintenance due to the improvement of the wear rate of parts; there is therefore a need for a brake caliper assembly that addresses this problem.

Disclosure of Invention

The utility model discloses to the shortcoming among the prior art, provide a combined type electron parking braking pincers assembly. In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

a combined type electronic parking brake caliper assembly comprises an inner caliper body, an outer caliper body, a driving assembly and a support, wherein a first piston cylinder used for accommodating a first piston is arranged in the inner caliper body; a second piston cylinder used for accommodating a second piston is arranged in the outer clamp body and is communicated with the first piston cylinder through an oil duct; an inner friction plate and an outer friction plate are respectively arranged in the bracket, when braking is not applied, the inner friction plate and the outer friction plate are respectively positioned on the outer sides of the first piston and the second piston, and the claw part of the inner caliper body is positioned on the outer side of the outer friction plate; the guide driving component is in transmission connection with the output end of the driving assembly, extends into the first piston and can push the first piston to move radially. Due to the adoption of the split calipers with the two caliper bodies and the bracket, the maintenance of parts is convenient, the manufacturing procedures are reduced, the production cost is reduced, and the braking effect is ensured while the cost of service braking can be reduced by the double-side single-piston structure. The floating inner caliper body is driven by a mechanical structure to drive the outer friction plate to move so as to clamp the brake disc by relative movement of the friction plates when parking braking is performed, and the inner and outer friction plates are driven by hydraulic pressure to move relatively so as to clamp the brake disc when driving braking is performed, so that the friction plates and the piston can accurately return to the initial positions after braking is released, and drag torque is reduced.

Preferably, the guiding driving part comprises a threaded guide rod and a nut, the threaded guide rod is in transmission connection with the output end of the driving assembly, the driving assembly drives the threaded guide rod to be rotatably arranged in the inner clamp body, the nut is arranged outside the threaded guide rod and at least provided with a section of thread, the threaded guide rod drives the nut to axially move through the thread matching with the nut, and the nut is positioned in the first piston cylinder.

Preferably, the driving assembly is fixedly connected with the inner clamp body, and the driving assembly is in transmission connection with the threaded guide rod through a spline.

Preferably, the inner clamp body is provided with a limiting groove, a rotating bearing is installed in the limiting groove, the threaded guide rod is provided with a limiting platform, and one end, connected with the driving assembly, of the threaded guide rod penetrates through the rotating bearing to be installed, so that the limiting platform is attached to the surface, on one side of the first piston cylinder, of the rotating bearing, and axial limiting of the threaded guide rod is achieved.

Preferably, the threaded guide is provided with a sealing ring in the radial direction. The sealing ring can be arranged in one or more positions, wherein the positions comprise a joint with the rotating bearing, a joint with the driving assembly and the like, so that a connecting gap between the parts is eliminated, the sealing performance of the whole brake caliper is improved, and the brake fluid is prevented from flowing out.

Preferably, the inner friction plate and the outer friction plate are respectively arranged on the bracket through bracket springs. The support reed can guide the movement direction of the friction plate, can also support the inner friction plate and the outer friction plate, and plays a role in fixing the friction plate by matching with the support structure.

Preferably, the left and right claw portions of the inner caliper body have a gap therebetween, and the second piston is disposed in the gap between the two claw portions. A space for the piston to move is reserved between the claw parts, when parking brake is applied, the claw parts of the inner caliper body drag the outer friction plate to move, when service brake is applied, the second piston pushes the second friction plate to move, and the two friction plates do not interfere with each other in the respective operation processes.

Preferably, the inner caliper body is connected to the support frame by a guide pin, and the inner caliper body is axially movable along the guide pin when the brake is applied or released.

Preferably, the outer clamp body is integrally formed with the bracket or fixedly connected thereto, wherein the fixedly connected includes being connected by means of a connecting member such as a bolt. Because the outer clamp body and the support are fixed relative to the installation position, the forming mode is split or integral, and the work of the clamp body is not influenced.

Preferably, at least one of the inner caliper body and the outer caliper body is provided with an oil inlet through which brake fluid enters, and at least one of the inner caliper body and the outer caliper body is provided with an air vent. The oil inlet and the air vent are both provided with at least one, but the two pliers bodies can also be provided with oil inlets or air vents.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect:

the double-side single-piston structure is adopted, a pair of friction plates and pistons are shared by service braking and parking braking, the number of parts is small, the structure is simple, the cost is low, and due to the split structure of the clamp body and the support, the processing procedure is further simplified, and the processing cost is reduced;

the parking brake is mechanically controlled through the guide driving part, the brake disc is clamped by means of the joint movement of the friction plates on the two sides instead of clamping the brake disc by means of the movement of the single-side friction plate in the conventional parking brake caliper, and the condition that the abrasion of the single-side friction plate is more serious can be effectively reduced;

the hydraulic driving application of the service brake is adopted, and the structure that the friction plates on the two sides move towards the brake disc is adopted, so that the braking effect of the fixed caliper during the driving can be achieved, meanwhile, due to the fact that the two sides are respectively provided with a single piston, and the friction plates, the inner side piston structure and the parking brake are shared, the friction plate blocks on the inner side and the outer side can be completely separated from the brake disc after the parking brake is released, dragging can be reduced, and meanwhile, the production cost can be greatly reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of the present invention.

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

Fig. 4 is an exploded view of the present invention.

The names of the parts designated by the numerical references in the above figures are as follows: wherein, 1, an inner clamp body; 2. an outer caliper body; 3. a support; 4. an oil passage; 5. a drive assembly; 11. a first piston; 12. a first piston cylinder; 13. a claw portion; 14. a rotating bearing; 15. an oil inlet; 21. a second piston; 22. a second piston cylinder; 31. an inner friction plate; 32. an outer friction plate; 33. a support spring plate; 34. a guide pin; 51. a spline; 61. a threaded guide rod; 62. and a nut.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

A combined type electronic parking brake caliper assembly is shown in figures 1-4 and comprises an inner caliper body 1, an outer caliper body 2, a driving assembly 5 and a support 3, wherein the inner caliper body 1 is provided with a first piston cylinder 12 used for accommodating a first piston 11, the driving assembly 5 is arranged on one side of the inner caliper body 1, and the other side of the inner caliper body 1 is provided with a claw part 13; a second piston cylinder 22 used for containing a second piston 21 is arranged in the outer caliper body 2, the second piston cylinder 22 is communicated with the first piston cylinder 12 through an oil passage 4, wherein the oil passage 4 can be an inner oil passage 4 or an outer oil passage 4, or the inner oil passage 4 and the outer oil passage 4 are cast or machined in a combined mode; an inner friction plate 31 and an outer friction plate 32 are respectively installed in the bracket 3, when braking is not applied, the inner friction plate 31 and the outer friction plate 32 are positioned on the outer sides of a first piston and a second piston, the inner friction plate is arranged corresponding to the first piston, the second piston is arranged corresponding to the outer friction plate, due to the fact that dragging of the caliper is reduced, the friction plates are ideally close to the pistons but not in contact with the pistons, but the condition that the friction plates are in contact with the pistons is not eliminated, and the claw part 13 of the inner caliper body 1 is positioned on the outer side of the outer friction plate 32; the device also comprises a driving assembly 5 and a guide driving part; the guiding driving component is in transmission connection with the output end of the driving assembly 5, extends into the first piston 11 and can push the first piston 11 to move radially.

The guiding driving component usually uses the screw nut and the ball screw to cooperate with each other to form a component that can be driven mutually, here the guiding driving component takes the screw guide 61 and the nut 62 as an example, the screw guide 61 and the nut 62 are provided with a seal ring in the radial direction, the screw guide 61 is in transmission connection with the output end of the driving assembly 5, the driving assembly 5 drives the screw guide 61 to be rotatably arranged in the inner caliper body 1, the nut 62 is sleeved outside the screw guide 61 and is provided with at least one section of screw thread, the screw guide 61 drives the nut 62 to move axially by cooperating with the screw thread of the nut 62, and the nut 62 is located in the first piston cylinder 12.

The driving assembly 5 is fixedly connected with the inner clamp body 1, and the driving assembly 5 is in transmission connection with the threaded guide rod 61 through a spline 51. The inner caliper body 1 is provided with a limiting groove, a rotating bearing 14 is installed in the limiting groove, the threaded guide rod 61 is provided with a limiting platform, one end, connected with the driving assembly 5, of the threaded guide rod 61 penetrates through the rotating bearing 14 to be installed, so that the limiting platform is attached to the surface, on one side of the first piston cylinder 12, of the rotating bearing 14, and axial limiting of the threaded guide rod 61 is achieved.

The inner friction plate 31 and the outer friction plate 32 are respectively mounted on the bracket 3 through bracket springs 33, and the bracket springs 33 are mounted on the bracket 3 and drive the inner friction plate 31 and the outer friction plate 32 to move back and forth when the driving brake is released. The support spring plate can only play a role in guiding and supporting the friction plate, and can also adopt a support spring plate with an active return function, the support spring plate can drive the inner friction plate and the outer friction plate to move back to back, and the resilience of the inner friction plate and the outer friction plate in the braking and releasing process is enhanced. Or a return spring can be arranged on the bracket, and the upper side and the lower side of the return spring are propped against the inner surfaces of the inner friction plate and the outer friction plate to drive the inner friction plate and the outer friction plate to rebound.

The left and right claw portions 13 of the inner caliper body 1 have a space therebetween, and the second piston 21 is disposed in the space between the two claw portions 13. The inner caliper body is connected with the bracket 3 through a guide pin 34, and the inner caliper body 1 can move axially along the guide pin 34 when the brake is applied or released. The axial movement is the direction of movement of the inner and

outer friction plates

31, 32 when the brakes are applied or released.

The outer clamp body 2 is connected with the bracket 3 through a bolt. After the outer caliper body 2 is fixed with the bracket 3, the relative installation position cannot be changed because the bracket 3 plays a role of installing a caliper of the brake caliper, and the outer caliper body 2 is connected with the bracket 3 and is kept fixed in any state, and only the second piston 21 in the outer caliper body moves relative to the outer caliper body 2 when the brake is applied and released.

At least one of the inner caliper body 1 and the outer caliper body 2 is provided with an oil inlet 15 for brake fluid to enter, and at least one of the inner caliper body and the outer caliper body is provided with an air vent.

The working principle is as follows:

when service brake is applied, after a brake pedal is stepped on, brake fluid enters a cavity of the first piston 11 from an oil inlet and enters a cavity of the second piston through an oil pipe, the first piston 11 and the second piston 21 are pushed by hydraulic pressurization of the brake fluid, the first piston 11 and the second piston 21 respectively push the inner friction plate 31 and the outer friction plate 32 to move oppositely, so that the inner friction plate 31 and the outer friction plate 32 clamp the brake disc, the service brake function is realized, and after the brake pedal is released, the inner friction plate 31 and the outer friction plate 32 are pushed to rebound by the support spring 33 which is used for accumulating elastic potential energy in the brake application process or the additionally arranged return spring, so that the return is realized. Or the inner friction plate and the outer friction plate are separated from the brake disc only by reacting force to the friction plates through the rotation of the brake disc without an elastic piece.

When the parking brake is applied, the driving assembly 5 is started, the output end of the driving assembly 5 rotates, and simultaneously the spline 51 drives the threaded guide rod 61 to rotate, the threaded guide rod 61 is limited due to the radial position, the threaded fit of the threaded guide rod 61 and the nut 62 drives the nut 62 to move along the extending direction of the thread, namely, the direction of pushing the inner friction plate 31, through the thread when the threaded guide rod rotates, no matter whether the threaded guide rod has an idle stroke or not, the nut 62 contacts the first piston 11, the nut 62 continues to push the first piston 11 forward, the first piston 11 pushes the inner friction plate 31 to move forward until the inner friction plate 31 contacts the brake disc, under the block of the brake disc, the brake disc continuously applies the pushing force to the nut 62 to generate the reaction force to move the nut 62 and the threaded guide rod 61, so that the inner caliper moves along the guide pin 34 in the direction departing from the outer caliper 2 under the drive of the threaded guide rod 61, and because the claw part 13 of the inner caliper is reversely embedded outside the outer friction plate 32, when the inner caliper body moves away from the outer caliper body 2, the claw part 13 hooks the outer friction plate 32 and drives the outer friction plate 32 to move towards the brake disc between the inner friction plate 32 and the outer friction plate 32, until the outer friction plate 32 and the inner friction plate 31 respectively clamp the brake disc to realize parking braking.

When the parking brake is released, the driving device drives the assembly to reversely drive the threaded guide rod to release pressure, the piston retracts along the axial direction under the action of the resilience force of the support reed, and the parking brake is released.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims

1. The utility model provides a combined type electron parking braking pincers assembly which characterized in that: comprises that

A drive assembly;

the driving assembly is arranged on one side of the inner clamp body, and the other side of the inner clamp body is provided with a claw part;

the outer clamp body is internally provided with a second piston cylinder for accommodating a second piston, and the second piston cylinder is communicated with the first piston cylinder through an oil duct;

the brake caliper comprises a bracket, an inner friction plate and an outer friction plate are respectively arranged in the bracket, when braking is not applied, the inner friction plate and the outer friction plate are respectively positioned on the outer sides of a first piston and a second piston, and a claw part of an inner caliper body is positioned on the outer side of the outer friction plate;

and the guide driving part is in transmission connection with the output end of the driving assembly, extends into the first piston and can push the first piston to move radially.

2. A composite electronic parking brake caliper assembly according to claim 1, wherein:

the guide driving part comprises

The screw thread guide rod is in transmission connection with the output end of the driving assembly, and the driving assembly drives the screw thread guide rod to be rotatably arranged in the inner clamp body;

the nut is arranged outside the threaded guide rod and at least provided with a section of threads, the threaded guide rod drives the nut to move axially through the matching of the threads of the nut, and the nut is positioned in the first piston cylinder.

3. A composite electronic parking brake caliper assembly according to claim 2, wherein: the driving assembly is fixedly connected with the inner clamp body and is in transmission connection with the threaded guide rod through a spline.

4. A composite electronic parking brake caliper assembly according to claim 2, wherein: the inner clamp body is provided with a limiting groove, a rotating bearing is installed in the limiting groove, the threaded guide rod is provided with a limiting platform, and one end, connected with the driving assembly, of the threaded guide rod penetrates through the rotating bearing to be installed, so that the limiting platform is attached to the surface, on one side of the first piston cylinder, of the rotating bearing, and axial limiting of the threaded guide rod is achieved.

5. A composite electronic parking brake caliper assembly according to claim 2, wherein: the threaded guide rod is radially provided with a sealing ring.

6. A composite electronic parking brake caliper assembly according to claim 1, wherein: the inner friction plate and the outer friction plate are respectively arranged on the bracket through bracket reeds.

7. A composite electronic parking brake caliper assembly according to claim 1, wherein: the left claw part and the right claw part of the inner clamp body are provided with intervals, and the second piston is arranged in the interval between the two claw parts.

8. A composite electronic parking brake caliper assembly according to claim 1, wherein: the inner caliper body is connected with the bracket through a guide pin, and the inner caliper body can move axially along the guide pin when the brake is applied or released.

9. A composite electronic parking brake caliper assembly according to claim 1, wherein: the outer clamp body and the bracket are integrally formed or fixedly connected.

10. A composite electronic parking brake caliper assembly according to claim 1, wherein: at least one of the inner caliper body and the outer caliper body is provided with an oil inlet for brake fluid to enter, and at least one of the inner caliper body and the outer caliper body is provided with an air vent.