CN217462984U - Lightweight piston and EPB brake caliper assembly thereof - Google Patents

Abstract

The utility model relates to a brake caliper field discloses a lightweight piston and EPB braking pincers assembly thereof, the lightweight piston includes piston body and adjusting nut, one side of piston body is equipped with the opening that supplies the adjusting nut to get into, the opposite side of piston body is equipped with confined bottom and forms the cavity that is used for holding adjusting nut in this internal formation of piston, the inner wall of piston body is equipped with spacing muscle, spacing muscle is by the inner wall of piston body to the central line direction protrusion, the shape of every spacing muscle is unanimous, adjusting nut corresponds every spacing muscle and is equipped with the recess that matches with its shape, the cell wall of every recess and the contact surface between the spacing muscle are two faces for the curved surface or have at least. The utility model discloses a piston of non-platform formula is spacing to the nut, realizes the spacing of nut through the structure of spacing muscle, through the shape that changes spacing muscle, changes the spacing muscle of surface form into the punctiform, makes spacing muscle and adjusting nut realize point-to-point spacing, from this lightens weight simultaneously.

Description

Lightweight piston and EPB brake caliper assembly thereof

Technical Field

The utility model relates to a brake caliper field especially relates to a lightweight piston and EPB braking pincers assembly thereof.

Background

The dragging of the brake caliper has a crucial influence on the oil consumption, the power consumption, the exhaust emission, the endurance mileage, the service life of a friction pair and the like of the automobile, and is one of the research hotspots in the automobile industry at home and abroad. The sliding resistance of the floating caliper has great influence on dragging, the dragging is also larger if the sliding resistance is larger, and the dragging is smaller if the sliding resistance is larger. The sliding resistance is the product of the positive pressure of the object and the friction coefficient, the positive pressure of the object is related to the self weight, the lighter the self weight is, the smaller the sliding resistance is, and the heavier the sliding resistance is. Therefore, the light weight of the caliper assembly is one of means for reducing the caliper dragging, the piston is an important component of the EPB caliper assembly, and the weight of the piston has a great influence on the weight of the caliper assembly, so that the light weight design of the piston of the EPB caliper assembly is a very important measure for reducing the caliper sliding resistance and reducing the caliper dragging.

Disclosure of Invention

The utility model discloses to the shortcoming among the prior art, provide a lightweight piston and EPB braking pincers assembly thereof.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

the utility model provides a lightweight piston, be applicable to EPB braking pincers assembly, including piston body and adjusting nut, one side of piston body is equipped with the opening that supplies the adjusting nut to get into, the opposite side of piston body is equipped with confined bottom and forms the cavity that is used for holding adjusting nut in this internal formation of piston, the inner wall of piston body is equipped with spacing muscle, spacing muscle is by the inner wall of piston body to the central line direction protrusion, the shape of every spacing muscle is unanimous, adjusting nut corresponds every spacing muscle and is equipped with the recess that matches with its shape, the cell wall of every recess and the contact surface between the spacing muscle are the curved surface or have two faces at least.

Preferably, the piston body is provided with two symmetrically-arranged limiting ribs, the middle of the two limiting ribs protrudes inwards, and the adjusting nut is provided with a groove matched with the limiting ribs in shape at the two opposite narrow sides corresponding to the limiting ribs.

Preferably, the piston body is provided with at least three limiting ribs, and the limiting ribs are uniformly arranged along the circumferential direction of the inner wall of the piston body.

Preferably, the cross section of the limiting rib is arc-shaped, a groove is arranged at the position, corresponding to each limiting rib, of the head of the adjusting nut, the groove is an arc-shaped gap, and the size of the groove is matched with that of the limiting rib.

An EPB brake caliper assembly comprises a brake caliper body, and a light-weight piston is arranged in the brake caliper body.

Preferably, the adjusting device further comprises a screw rod, the inner side wall of the adjusting nut is provided with threads arranged in the axial direction, and the screw rod is in threaded connection with the adjusting nut.

The cross section of the limiting rib arranged in the brake caliper body is arc-shaped, a groove is arranged at the position, corresponding to each limiting rib, of the head of the adjusting nut, the groove is an arc-shaped gap, and the size of the groove is matched with that of the limiting rib.

Preferably, the piston further comprises a mounting bracket, friction plates on the inner side and the outer side are arranged on the mounting bracket, and the piston body abuts against the outer side of one friction plate and can axially move to push the friction plates to move oppositely.

Preferably, the screw rod driving device further comprises a driving assembly, and an output end of the driving assembly is connected with the screw rod and can drive the screw rod to rotate.

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

adopt the piston of non-platform formula to be spacing to the nut, realize the spacing of nut through the structure of spacing muscle, because spacing muscle runs through the setting inside and outside the piston, its weight is also very big to the weight influence of whole piston even braking pincers, through the shape that changes spacing muscle, changes the spacing muscle of face-like into the punctiform, makes spacing muscle and adjusting nut realize point-to-point spacing, alleviates weight from this simultaneously. The piston has a larger weight reduction than the original piston, and the piston cost is reduced due to the reduction of materials. Adopt lightweight piston can make EPB calliper assembly dead weight descend, can reduce unsprung mass, improve the car and control the performance.

Adopt the lightweight piston to make EPB calliper assembly sliding resistance descend, performance such as piston return volume and piston sliding resistance has good promotion, and distribution, control the even degree of distribution and can both have about, around comparing in prior art piston, the utility model discloses a calliper focus distributes more profitably, plays the effect of showing to reducing the dragging.

Drawings

Fig. 1 is a schematic structural view of two limiting ribs arranged in a piston body.

Fig. 2 is a schematic structural view of three limiting ribs arranged in the piston body.

Fig. 3 is a schematic structural view of the piston body with four limiting ribs.

Figure 4 is a top view of a prior art piston body.

Fig. 5 is a schematic view of a structure of a prior art piston body.

FIG. 6 is a schematic diagram of the construction of the EPB caliper assembly.

The names of the parts indicated by the numerical references in the above figures are as follows: wherein, 1, a piston body; 2. adjusting the nut; 21. a cavity; 3. limiting ribs; 4. a caliper body; 5. mounting a bracket; 6. a friction plate; 7. a screw; 8. and a drive assembly.

Detailed Description

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

Example 1

The utility model provides a lightweight piston, as shown in figure 1, including piston body 1 and adjusting nut 2, one side of piston body 1 is equipped with the opening that supplies adjusting nut 2 to get into, the opposite side of piston body 1 is equipped with confined bottom and forms the cavity 21 that is used for holding adjusting nut 2 in piston body 1, the inner wall of piston body 1 is equipped with spacing muscle 3, spacing muscle 3 is projected to the central line direction by the inner wall of piston body 1, spacing muscle 3 and piston body integrated into one piece, the shape of every spacing muscle 3 is unanimous, adjusting nut 2 corresponds every spacing muscle 3 and is equipped with the recess that matches with it shape, if adjusting nut 2 sets up the recess, the contact surface between the cell wall of every recess and the spacing muscle 3 is the curved surface or has two faces at least. Two limiting ribs 3 which are symmetrically arranged are arranged on the piston body 1, the middle of the two limiting ribs 3 protrudes inwards, and the adjusting nut 2 is provided with a groove which is matched with the limiting ribs 3 in shape at the two opposite narrow sides.

As shown in fig. 4-5, for the piston body of the prior art, both sides are provided with the platform respectively and are used for spacing adjusting nut, and the spacing muscle of the piston body in this embodiment has significantly reduced the consumptive material compared with the platform of the prior art.

Example 2

As shown in fig. 2 to 3, the difference between the embodiment 1 and the embodiment 1 is that at least three limiting ribs 3 are provided on the piston body 1, and each limiting rib 3 is uniformly provided along the circumferential direction of the inner wall of the piston body 1. Under natural conditions, the forces in the front-back direction and the left-right direction of the piston body 1 are balanced.

If be provided with three spacing muscle 3 on the piston body 1, three spacing muscle 3 evenly distributed are the triangle in the inside of piston body 1, and the distribution. The adjusting nut can be correspondingly made into a triangle, grooves are formed in three corners of the triangle, grooves can also be formed in three edges of the triangle, however, in theory, the grooves formed in the three corners can be smaller in size, cost is saved, and light weight is achieved. If be provided with four spacing muscle 3 on the piston body 1, four spacing muscle 3 are evenly distributed in the inside of piston body 1, and the line is the square between the adjacent spacing muscle 3. The adjusting nut 2 is also correspondingly provided with at least four edges which are symmetrical left and right and front and back, and corresponding grooves are arranged on the edges or four edges. Five or more than five limiting ribs 3 can be arranged in the piston body 1, and the adjacent limiting ribs 3 are connected to form a regular polygon.

The cross section of the limiting rib 3 is arc-shaped, the arc-shaped refers to the trend and can be semicircular, elliptical arc, parabolic and the like, a groove is arranged at the position, corresponding to each limiting rib 3, of the head of the adjusting nut 2, the groove is an arc-shaped gap, and the size of the groove is matched with that of the limiting rib 3.

Example 3

An EPB brake caliper assembly is shown in fig. 6 and comprises a brake caliper body 4, a lightweight piston in any one of embodiments 1-3 is arranged in the brake caliper body 4, a mounting bracket 5 is further included, friction plates 6 on the inner side and the outer side are arranged on the mounting bracket 5, and a piston body abuts against the outer side of one friction plate 6 and can move axially to push the friction plates 6 to move oppositely. That is to say, the piston body is spacing through recess and bellied cooperation with adjusting nut, prevents adjusting nut 2 and rotates. The pistons with different cylinder diameters are enabled not to rotate relatively through adjusting the protruding degree and the left and right width of the limiting rib 3 and correspondingly processing the adjusting nut.

Still include drive assembly 8 and screw rod 7, the inside wall of adjusting nut 2 is equipped with the screw thread of axial setting, screw rod 7 and adjusting nut 2 threaded connection. The output end of the driving assembly 8 is connected with the screw 7 and can drive the screw to rotate. Because motor drive assembly 8 drive screw 7 rotates, because screw 7 and adjusting nut 2 threaded connection, so the rotation of screw 7 can drive adjusting nut 2 axial displacement, adjusting nut is located piston body 1 cavity 21, owing to have spacing muscle 3 to adjusting nut 2 spacing, adjusting nut can promote piston body 1 or have axial relative motion from between the relative piston body 1, when adjusting nut 2 promotes piston body 1 and moves forward, because its and the inboard friction disc 6 between be connected, piston body 1 consequently can drive inside and outside friction disc 6 and press from both sides tight brake disc, guarantee parking braking function and realize.

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, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not 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 (7)

1. The utility model provides a lightweight piston, includes piston body and adjusting nut, and one side of piston body is equipped with the opening that supplies adjusting nut to get into, and the opposite side of piston body is equipped with confined bottom and forms the cavity that is used for holding adjusting nut in the piston body, its characterized in that: the inner wall of the piston body is provided with limiting ribs, the limiting ribs protrude from the inner wall of the piston body towards the direction of the central line, the shape of each limiting rib is consistent, and the adjusting nut corresponding to each limiting rib is provided with a groove wall matched with the limiting rib in shape, and a contact surface between the groove wall of each groove and the limiting rib is a curved surface or at least has two surfaces.

2. The lightweight piston according to claim 1, wherein: two limiting ribs which are symmetrically arranged are arranged on the piston body, the middle of each limiting rib protrudes inwards, and the adjusting nut is provided with a groove which is matched with the limiting ribs in shape at the two opposite narrow sides.

3. The lightweight piston according to claim 1, wherein: at least three limiting ribs are arranged on the piston body, and the limiting ribs are uniformly arranged along the circumferential direction of the inner wall of the piston body.

4. The lightweight piston according to claim 3, wherein: the cross-section of spacing muscle is arc, and the head of adjusting nut corresponds the position of every spacing muscle and is provided with the recess, and the recess is convex breach, the size and the spacing muscle phase-match of recess.

5. An EPB brake caliper assembly characterized by: the lightweight piston comprises a brake caliper body, wherein the lightweight piston is arranged in the brake caliper body according to any one of claims 1 to 4, and the lightweight piston further comprises a screw rod, the inner side wall of an adjusting nut is provided with an axially arranged thread, and the screw rod is in threaded connection with the adjusting nut.

6. An EPB brake caliper assembly according to claim 5, wherein: the piston is characterized by further comprising a mounting support, wherein friction plates on the inner side and the outer side are arranged on the mounting support, and the piston body is abutted against the outer side of one friction plate and can axially move to push the friction plates to move in opposite directions.

7. An EPB brake caliper assembly according to claim 5, wherein: the screw rod driving device further comprises a driving assembly, and the output end of the driving assembly is connected with the screw rod and can drive the screw rod to rotate.

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