CN219692088U - Brake caliper and automobile - Google Patents

Abstract

The utility model relates to a brake caliper and an automobile, and relates to the technical field of automobile braking. The brake caliper comprises a caliper body, a friction plate and a piston, wherein the piston drives the friction plate to move, a sealing groove is formed in the inner wall of a hydraulic cylinder of the caliper body, and a rectangular sealing ring which is in butt joint with the piston is arranged in the sealing groove. The seal groove comprises a bottom, a first side wall arranged on one side of the seal groove close to the friction plate and a second side wall arranged on one side of the seal groove far away from the friction plate, and the bottom is connected with the first side wall and the second side wall. The first side wall comprises a first sub wall and a second sub wall, the first sub wall is a side where the chamfer is located on the first side wall, and the second sub wall is parallel to the side edge of the rectangular sealing ring. The rectangular sealing ring can be abutted with the second sub-wall without deformation, and a gap is not reserved between the rectangular sealing ring and the second sub-wall, so that the total liquid requirement is effectively reduced, the pedal idle stroke during braking is reduced, and the braking sensitivity is improved.

Description

Brake caliper and automobile

Technical Field

The utility model relates to the technical field of automobile braking, in particular to a brake caliper and an automobile.

Background

Brake calipers are widely used in vehicles and are one of the core components of an automobile brake system. The brake calipers rely on the sealing action of the rectangular sealing ring, the piston and the calipers body to establish hydraulic pressure so as to push the friction plate to clamp the brake disc, and the hydraulic pressure interacts with the brake disc to generate braking force.

The liquid demand of the brake calipers is an important parameter affecting the brake sensitivity, and is directly related to the braking effect of the brake calipers. The existing brake calipers have excessive liquid requirement, the pedal feel of a driver is too soft, the idle stroke of the pedal is increased, and the sensitivity of the brake is reduced.

Disclosure of Invention

The utility model provides a brake caliper and an automobile, and aims to solve the technical problem that the brake caliper is excessive in liquid requirement. The technical scheme of the utility model is as follows:

according to a first aspect of the utility model, there is provided a brake caliper, comprising a caliper body, a friction plate and a piston, wherein the piston is arranged in a hydraulic cylinder formed in the caliper body, the piston drives the friction plate to move, a sealing groove is arranged on the inner wall of the hydraulic cylinder of the caliper body, a rectangular sealing ring is arranged in the sealing groove, and the rectangular sealing ring is abutted against the piston; the end of the sealing groove close to the piston is provided with a chamfer angle. The seal groove comprises a bottom, a first side wall and a second side wall, wherein the first side wall is arranged on one side, close to the friction plate, of the seal groove, the second side wall is arranged on one side, far away from the friction plate, of the seal groove, and the bottom is connected with the first side wall and the second side wall. The first side wall comprises a first sub wall and a second sub wall, the first sub wall is the edge where the chamfer is located on the first side wall, and the second sub wall is parallel to the side edge of the rectangular sealing ring.

According to the technical means, the gap between the second sub-wall and the rectangular sealing ring is removed, the space size of the sealing groove is reduced, the total liquid requirement amount of the brake caliper is effectively reduced, the pedal idle stroke during braking is reduced, and the braking sensitivity is improved.

In a possible embodiment, the first angle formed by the extension direction of the first sub-wall and the extension direction of the second sub-wall is in the range of 30 ° -40 °.

According to the technical means, the included angle between the first sub-wall and the second sub-wall is limited, so that a gap reserved between the friction plate and the brake disc is large enough, the low dragging force of the brake caliper is kept, the total liquid requirement of the brake caliper is reduced on the basis of guaranteeing the return stroke of the piston, the pedal idle stroke during braking is reduced, and the brake sensitivity is improved.

In one possible embodiment, the length of the first sub-wall in the direction of movement of the piston ranges from 0.4mm to 0.9mm.

According to the technical means, the inclination degree of the first sub-wall is limited, the chamfer angle of the end part of the sealing groove close to the piston is further limited, the liquid requirement for filling the second gap between the first sub-wall and the rectangular sealing ring is reduced on the basis of meeting the return stroke amount of the piston, the total liquid requirement of the brake caliper is further reduced, the pedal idle stroke during braking is reduced, and the brake sensitivity is improved.

In one possible embodiment, the second sub-wall forms an angle with the bottom in the range of 90 ° ± 30'.

According to the technical means, no gap is reserved between the second sub-wall and the rectangular sealing ring, and no gap is reserved between the bottom of the sealing groove and the bottom edge of the rectangular sealing ring, so that the gap between the sealing groove and the rectangular sealing ring is further reduced, the total liquid requirement of the brake caliper is reduced, the pedal idle stroke during braking is further reduced, and the brake sensitivity is improved.

In one possible embodiment, the second sub-wall is attached to a side of the rectangular seal ring, and the bottom of the seal groove is attached to the bottom of the rectangular seal ring.

According to the technical means, whether the included angle between the side edge and the bottom of the sealing ring is a right angle or not, the second sub-wall and the bottom are always attached to the sealing ring, so that the gap between the sealing groove and the rectangular sealing ring is further reduced, the total liquid requirement of the brake caliper is reduced, the pedal idle stroke during braking is further reduced, and the brake sensitivity is improved.

In one possible embodiment, the sealing interference of the rectangular sealing ring is 0.2mm-0.5mm.

According to the technical means, the sealing interference magnitude ensures that the rectangular sealing ring plays a role in sealing.

In one possible embodiment, the angle formed by the end of the sealing groove near the piston and the extending direction of the bottom of the sealing groove ranges from 4 ° to 6 °.

According to the technical means, the end face of the sealing groove is prevented from being parallel to the bottom and the rectangular sealing ring, the rectangular sealing ring is prevented from horizontally moving in the sealing groove 10, and the rectangular sealing ring cannot be clamped in the sealing groove to play a sealing role.

In a possible embodiment, a gap is left between the piston and the caliper body, the height of the gap in the second direction being 0mm-0.15mm.

According to the technical means, the assembly is convenient.

In one possible embodiment, a gap is left between the piston and the caliper body, and a portion of the rectangular sealing ring is located in the gap, and the height of the gap is 0.2-0.5 mm.

According to a second aspect of the present utility model there is provided an automobile comprising a brake, wherein the brake comprises a brake caliper according to any of the above embodiments.

It should be noted that, the technical effects caused by any implementation manner of the second aspect may be referred to the technical effects caused by any brake caliper of the first aspect, which are not described herein.

Therefore, the technical characteristics of the utility model have the following beneficial effects: on the basis of increasing the disc surface gap, the sealing groove of the brake caliper is parallel to the side edge of the rectangular sealing ring, so that the gap between the second sub-wall and the rectangular sealing ring is removed, the liquid demand of the brake caliper is reduced, and the brake pedal feel and the brake sensitivity are improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model and do not constitute a undue limitation on the utility model.

Fig. 1 is a block diagram of a brake according to an exemplary embodiment.

Fig. 2 is an enlarged view of I in fig. 1 in a non-braking state shown in the related art.

Fig. 3 is an enlarged view of I in fig. 1 in a braking state shown in the related art.

Fig. 4 is an enlarged view at I in fig. 1 in a non-braking state, according to an exemplary embodiment.

Fig. 5 is an enlarged view of I in fig. 1 in a braking state, according to an exemplary embodiment.

Fig. 6 is an enlarged view of still another section I of fig. 1 in a braked state according to an exemplary embodiment.

Detailed Description

In order to enable a person skilled in the art to better understand the technical solutions of the present utility model, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with aspects of the utility model as detailed in the accompanying claims.

Fig. 1 is a block diagram of a brake according to an exemplary embodiment.

The present utility model provides an automobile comprising a brake for generating a component that resists movement or movement tendencies of the vehicle. Wherein, referring to fig. 1, the brake comprises a brake disc 201 and a brake caliper 100. The brake disc 201 is fixed to the wheel, and is coupled to the inner race of the bearing 204 in the knuckle 203 via the hub 202, and the brake disc 201 rotates with the wheel via the bearing 204 when the vehicle is running. The brake caliper 100 is fixed to the knuckle 203 by a bracket 205. The brake caliper 100 includes a caliper body 50, a friction plate 20 and a piston 30. The piston 30 is disposed in a hydraulic cylinder formed in the caliper body 50, and the piston 30 drives the friction plate 20 to move. The inner wall of the hydraulic cylinder of the caliper body 50 is provided with a sealing groove 10, and a rectangular sealing ring is arranged in the sealing groove and is abutted against the piston 30. The friction plate 20 is located on both sides of the brake disc 201, and a first gap a is left between the friction plate 20 and the brake disc 201 in the non-braking state. In the braking state, the piston 30 drives the friction plate 20 to move, clamps the brake disc 201, and reduces the first gap a. And in a braking state, the braking force is controlled according to the force applied by a driver, so that the automobile is stably decelerated.

Fig. 2 is an enlarged view of I in fig. 1 in a non-braking state shown in the related art. Fig. 3 is an enlarged view of I in fig. 1 in a braking state shown in the related art.

Referring to fig. 2 and 3, the related art seal groove 10A includes a bottom 11A, a first sidewall 12A, and a second sidewall 13A. The first side wall 12A is disposed on a side of the seal groove 10A close to the friction plate 20, the second side wall 13A is disposed on a side of the seal groove 10A away from the friction plate 20, and the bottom 11A is connected to the first side wall 12A and the second side wall 13A. Wherein the first side wall 12A includes a first sub-wall 121A, a second sub-wall 122A, and a third sub-wall 123A. The end of the seal groove 10 near the piston 30 is provided with a chamfer. In the non-braking state, a second gap B is formed between the rectangular seal ring 60 and the first sub-wall 121A, and between the rectangular seal ring 60 and the second sub-wall 122A, and between the rectangular seal ring 60 and the third sub-wall 123A, and a third gap C is formed. The second clearance B is used for piston 30 callback and assembly relief. With continued reference to fig. 1 and 3, during braking, the brake fluid pushes the piston 30 and friction plate 20 to move and press against the brake disc 201, eliminating the first gap a. As the brake fluid pressure is continuously increased, the rectangular seal ring 60 is deformed, eliminating the second and third gaps B and C of the rectangular seal ring 60 and the caliper body 50. That is to say the amount of brake fluid required for the brake caliper consists of three parts: the liquid requirements of the first gap a, the liquid requirements of the second gap B and the liquid requirements of the third gap C are eliminated.

To prevent excessive drag from occurring in the rotation of the brake disc 201 and reduce the fuel consumption, the first clearance a needs to be maintained large enough to increase the chamfer angle of the end of the seal groove 10 near the piston 30 to increase the return stroke amount of the piston 30. However, this results in an increase in the liquid demand of the brake caliper, which increases pedal backlash and reduces brake sensitivity.

In order to solve the problems, the utility model removes the third clearance C and reduces the liquid requirement of the brake caliper.

Fig. 4 is an enlarged view at I in fig. 1 in a non-braking state, according to an exemplary embodiment. Fig. 5 is an enlarged view of I in fig. 1 in a braking state, according to an exemplary embodiment.

Referring to fig. 1, 4 and 5, the seal groove 10 includes a bottom 11, a first sidewall 12 and a second sidewall 13, the first sidewall 12 is disposed on a side of the seal groove 10 near the friction plate 20, the second sidewall 13 is disposed on a side of the seal groove 10 far from the friction plate 20, and the bottom 11 is connected to the first sidewall 12 and the second sidewall 13. The first side wall 12 includes a first sub-wall 121 and a second sub-wall 122, and the first sub-wall 121 is a side of the first side wall 12 where the chamfer is located. The second sub-wall 122 is parallel to the side of the rectangular gasket 60; meaning that the two are substantially parallel. Illustratively, the angle between the plane of the second sub-wall 122 and the plane of the side of the rectangular gasket 60 may be less than or equal to 5 °; for example, 3 ° or less, and for example, 0 °. The end of the sealing groove 10 close to the piston 30 is provided with a chamfer, that is to say, the sealing groove 10 is provided with a chamfer on the side close to the friction plate 20 and a chamfer on the side remote from the friction plate 20 for the retraction of the piston 30.

In the non-braking condition, with continued reference to fig. 4, the sides of the rectangular seal ring 60 are substantially in contact with the second sub-wall 122, leaving no gap between the rectangular seal ring 60 and the second sub-wall 122. At this time, a second gap B is left between the rectangular seal ring 60 and the first sub-wall 121. When switching to the braking state, with continued reference to fig. 5, as the brake fluid pressure is continuously increased, the rectangular seal ring 60 is deformed, eliminating the second gap B between the rectangular seal ring 60 and the caliper body 50. That is, the brake caliper of the present utility model has a brake fluid demand consisting of two parts: the liquid amount required for pushing out the piston 30 of the first gap a between the brake disc 201 and the friction plate 20 and the liquid amount required for filling the second gap B are eliminated. Compared with the structure of the seal groove 10 in the related art, the utility model removes the third clearance C, and the second sub-wall 122 and the rectangular seal ring 60 have no clearance, so that the space size of the seal groove 10 is reduced, and only the liquid required by pushing out the piston 30 and the liquid required by filling the first clearance B are required during braking, thereby effectively reducing the total liquid required by the brake caliper, reducing the pedal idle stroke during braking and improving the brake sensitivity.

Fig. 6 is an enlarged view of still another section I of fig. 1 in a braked state according to an exemplary embodiment.

In some embodiments, referring to fig. 6, the first angle D formed by the extension direction of the first sub-wall 121 and the extension direction of the second sub-wall 122 ranges from 30 ° to 40 °. Specifically, the first included angle D formed by the extending direction of the first sub-wall 121 and the extending direction of the second sub-wall 122 is an acute angle, for example, the first included angle may be 30 °, 35 °, 40 °, and may be in the range of 30 ° -40 °.

In the embodiment of the disclosure, the included angle between the first sub-wall 121 and the second sub-wall 122 is defined, and then the chamfer angle of the end of the seal groove 10 near the piston 30 is defined, and the first included angle D makes the first gap a left between the friction plate 20 and the brake disc 201 large enough, so as to keep the low drag force of the brake caliper, reduce the size of the second gap B as much as possible on the basis of ensuring the return stroke amount of the piston 30, reduce the liquid requirement amount required for filling the second gap B, further reduce the total liquid requirement amount of the brake caliper, reduce the pedal idle stroke during braking, and improve the brake sensitivity.

In other implementations, the chamfer of the end of seal groove 10 near piston 30 on the side near friction plate 20 and the side remote from friction plate 20 may be formed simultaneously in one process step.

In some embodiments, with continued reference to fig. 6, the length of the first sub-wall 121 in the direction of movement of the piston ranges from 0.4mm to 0.9mm. Specifically, the moving direction of the piston 30 is parallel to the end face of the seal groove 10 near the piston 30, and the length of the first sub-wall 121 in the moving direction of the piston is a first length F of orthographic projection of both ends of the first sub-wall 121 on the end face, in this case, the first length F ranges from 0.4mm to 0.9mm, and may be, for example, 0.4mm, 0.5mm, 0.8mm, or 0.9mm.

In the embodiment of the present disclosure, the first length F defines the inclination degree of the first sub-wall 121, and further defines the chamfer size of the end of the sealing groove 10 near the piston 30, so as to ensure the space size of the second gap B between the first sub-wall 121 and the rectangular sealing ring 60, and satisfy the return stroke amount of the piston 30 under the condition that the second gap B is as small as possible. That is, the liquid required for filling the second gap B is reduced, so that the total liquid required by the brake caliper is reduced, the pedal idle stroke during braking is reduced, and the brake sensitivity is improved.

In some embodiments, with continued reference to fig. 6, the second sub-wall 122 forms an angle with the bottom 11 in the range of 90 ° ± 30'. Specifically, the second sub-wall 122 forms a second angle E with the bottom 11 of the seal groove 10, and the second angle E is 90 °. The second angle E has a tolerance of 30' due to the influence of machining accuracy. The side edge (the side close to the friction plate 20) of the rectangular sealing ring 60 is at a right angle with the bottom edge, and the second included angle is the same as the right angle formed by the side edge and the bottom edge of the rectangular sealing ring 60, so that the bottom 11 of the sealing groove 10 is attached to the bottom edge of the rectangular sealing ring 60, and the second sub-wall 122 of the sealing groove 10 is attached to the side edge of the rectangular sealing ring 60. In the embodiment of the disclosure, no gap is left between the second sub-wall 122 of the seal groove 10 and the rectangular seal ring 60, no gap is left between the bottom 11 of the seal groove 10 and the bottom edge of the rectangular seal ring 60, the gap between the seal groove and the rectangular seal ring 60 is further reduced, and the third gap C is not required to be refilled, so that the total liquid requirement of the brake caliper is reduced, the pedal idle stroke during braking is further reduced, and the brake sensitivity is improved.

In some embodiments, with continued reference to fig. 6, the second sub-wall 122 is in abutment with the side of the rectangular seal ring 60, and the bottom 11 of the seal groove 10 is in abutment with the bottom of the rectangular seal ring 60. Specifically, the second sub-wall 122 is always attached to the side edge of the sealing ring, which is close to the friction plate 20, without leaving a gap; the bottom 11 of seal groove 10 is laminated all the time with the bottom of sealing washer, also does not leave the clearance, and like this, no matter the contained angle between side and the bottom of sealing washer is right angle, second sub-wall 122 and bottom 11 are laminated with the sealing washer all the time, has further reduced the clearance between seal groove and the rectangular sealing washer 60 for brake caliper's total liquid demand reduces, further reduces the footboard idle running when braking, improves the braking sensitivity.

In some embodiments, with continued reference to fig. 6, the rectangular seal ring 60 has a seal interference of 0.2mm to 0.5mm. Specifically, after the rectangular seal ring 60 is placed in the seal groove 10, it is assumed that the rectangular seal ring 60 is not deformed, at this time, theoretically, the rectangular seal ring 60 exceeds the first height K of the piston 30 in the direction perpendicular to the moving direction of the piston 30 to serve as a sealing interference, and the sealing interference ensures that the rectangular seal ring 60 plays a sealing role. The first height K may range from 0.2mm to 0.5mm, for example 0.2mm, 0.3mm, 0.5mm.

In some embodiments, with continued reference to fig. 6, the bottom of seal groove 10 forms an included angle with the end of seal groove 10. Specifically, the end of the sealing groove 10, which is close to the piston 30, forms a third included angle H with the extending direction of the bottom of the sealing groove 10, and the range of the third included angle H is 4 ° to 6 °, so that the end face of the sealing groove 10 is prevented from being parallel to the bottom and the rectangular sealing ring 60, and the rectangular sealing ring 60 is clamped in the sealing groove 10 to play a sealing role.

In some embodiments, with continued reference to FIG. 6, for ease of assembly, a clearance is provided between the piston 30 and the caliper body 50 for an interference fit during assembly of the rectangular seal ring. The height of the gap in the direction perpendicular to the movement direction of the piston 30 is a second height G in the range of 0mm-0.15mm, which may be, for example, 0mm, 0.05mm, 0.1mm, 0.15mm.

The third included angle H and the second height G are calculated values based on the thickness of the rectangular sealing ring 60 and the depth of the sealing groove 10, and after the actual assembly, the extrusion deformation and the material flow of the rectangular sealing ring 60 are formed due to interference fit, and the sizes of the first height K, the third included angle H and the second height G are changed along with the regulation of the sealing interference magnitude so as to meet different interference fit structures.

The present utility model is not limited to the above embodiments, and any changes or substitutions within the technical scope of the present utility model should be covered by the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (9)

1. The brake caliper comprises a caliper body, a friction plate and a piston, wherein the piston is arranged in a hydraulic cylinder formed in the caliper body, the piston drives the friction plate to move, a sealing groove is formed in the inner wall of the hydraulic cylinder of the caliper body, a rectangular sealing ring is arranged in the sealing groove, and the rectangular sealing ring is abutted against the piston; the end part of the sealing groove, which is close to the piston, is provided with a chamfer angle; the sealing groove is characterized by comprising a bottom, a first side wall and a second side wall, wherein the first side wall is arranged on one side, close to the friction plate, of the sealing groove, the second side wall is arranged on one side, far away from the friction plate, of the sealing groove, and the bottom is connected with the first side wall and the second side wall; the first side wall comprises a first sub wall and a second sub wall, the first sub wall is the edge where the chamfer is located on the first side wall, and the second sub wall is parallel to the side edge of the rectangular sealing ring.

2. Brake calliper according to claim 1, wherein the first angle formed by the extension direction of the first sub-wall and the extension direction of the second sub-wall is in the range of 30 ° -40 °.

3. Brake calliper according to claim 1, wherein the length of the first sub-wall in the direction of movement of the piston ranges from 0.4mm to 0.9mm.

4. Brake calliper according to claim 1, wherein the second sub-wall forms an angle with the bottom in the range 90 ° ± 30'.

5. Brake calliper according to claim 1, wherein the second sub-wall is in abutment with the side edge of the rectangular sealing ring, the bottom of the sealing groove being in abutment with the bottom of the rectangular sealing ring.

6. Brake calliper according to claim 1, wherein the sealing interference of the rectangular sealing ring is 0.2-0.5 mm.

7. Brake calliper according to claim 6, wherein the end of the sealing groove close to the piston forms an angle in the range of 4 ° to 6 ° with the direction of extension of the bottom of the sealing groove.

8. Brake calliper according to claim 6, wherein a gap is left between the piston and the calliper body, the height of the gap in a direction perpendicular to the movement of the piston being 0-0.15 mm.

9. An automobile comprising a brake, characterized in that the brake comprises a brake caliper according to any one of claims 1-8.