CN218616611U

CN218616611U - Push rod assembly, braking system and vehicle

Info

Publication number: CN218616611U
Application number: CN202223037486.5U
Authority: CN
Inventors: 李金鸽; 朱洪伟; 萨图格日乐; 刘�东; 孙旭东; 田一润; 赵福成; 王瑞平
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Power Train Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Power Train Co Ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-14
Anticipated expiration: 2032-11-14

Abstract

Disclosed herein are a push rod assembly, a brake system and a vehicle. The push rod assembly comprises a main push rod, a piston rod, a first ball head seat and a limiting piece, wherein the piston rod is connected with the main push rod and moves along with the main push rod; an inner cavity is formed in one end of the piston rod, the main push rod comprises a ball head arranged at one end, and the ball head extends into the inner cavity; the first ball head seat is matched with the spherical surface of the ball head and can rotationally fix the ball head in the inner cavity, and the limiting piece fixes the ball head seat in the inner cavity so as to limit the ball head and the ball head seat from falling out of the inner cavity. The push rod assembly disclosed herein is convenient to assemble and control the overall size of the connecting structure.

Description

Push rod assembly, braking system and vehicle

Technical Field

The present application relates to, but is not limited to, vehicle braking technology, and more particularly to a push rod assembly, a braking system, and a vehicle.

Background

With the upgrading of a Brake-by-wire system, an intelligent booster is continuously updated and iterated, multiple functions such as an ESC (Electronic Stability Controller) and the like are gradually Integrated, the intelligent booster can be called an IPB (Integrated Power Brake), in the working process of the IPB, full decoupling is realized, a motor controls an electric master cylinder to compress Brake oil to realize braking, and an input push rod is connected with a Brake pedal, so that the functions of providing braking intention, transmitting pedal displacement and mechanically backing up are realized in the braking process.

The input push rod is connected with the pedal, and the pedal requires the push rod to rotate in the pushing process, so that the push rod with a similar spherical hinge structure is required to be adopted so as to be rotatably connected with a subsequent piston, but the assembly of the mode is more complicated, the size of the spherical hinge structure is larger, the size of the piston is increased, and the control of the whole size of the braking system is not facilitated.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a push rod assembly, a brake system and a vehicle, and the push rod assembly, the brake system and the vehicle are convenient to assemble and convenient to control the whole size of a connecting structure.

The embodiment of the application provides a push rod assembly, which comprises a main push rod, a piston rod, a first ball head seat and a limiting piece, wherein the piston rod is connected with the main push rod and moves along with the main push rod;

an inner cavity is formed in one end of the piston rod, the main push rod comprises a ball head arranged at one end, and the ball head extends into the inner cavity; the first ball socket is matched with the spherical surface of the ball head and can rotationally fix the ball head in the inner cavity, and the limiting piece fixes the ball socket in the inner cavity so as to limit the ball head and the ball socket from falling out of the inner cavity.

Furthermore, the push rod assembly further comprises a second ball socket arranged at the bottom of the inner cavity, and the first ball socket and the second ball socket are respectively located on two sides of the ball head to clamp and limit the ball head.

Further, the maximum central angle corresponding to the spherical surface contacted by the first ball seat and the ball head is less than 180 degrees, and/or the maximum central angle corresponding to the spherical surface contacted by the second ball seat and the ball head is less than 180 degrees.

Further, the end surface of the first ball cup includes a first plane and a first spherical surface, and the first plane is located outside the first spherical surface; the second ball cup comprises a second plane and a second spherical surface, and the second plane is positioned on the outer side of the second spherical surface;

a first gap is arranged between the first plane and the second plane.

Further, the push rod assembly further comprises a damping piece arranged between the first ball socket and the limiting piece.

Further, the damping member is installed between the first ball socket and the limiting member in an interference manner, so that the first ball socket abuts against the ball head.

Further, the main push rod comprises a connecting rod and a ball head, and the ball head is arranged at the end part of the connecting rod;

the connecting rod penetrates through the first ball socket, the damping piece and the limiting piece and extends out of the inner cavity; a second gap is arranged between the shock absorption piece and the connecting rod, and the second gap is set as follows: the connecting rod is abutted against the damping piece before colliding with the first ball head seat, the limiting piece and the piston in the rotating process.

Further, the damping member is a ring-shaped member;

the axial length of the shock absorbing member is 4-5mm, and/or the inner diameter of the shock absorbing member is 8-9mm.

The embodiment of the application further provides a braking system, which comprises a pedal, a main cylinder and the push rod assembly, wherein the pedal is connected with one end, which is not provided with the ball head, of the main push rod, and the piston is matched with the main cylinder.

The embodiment of the application also provides a vehicle, and the vehicle comprises the braking system.

Compared with some technologies, the method has the following beneficial effects:

the push rod subassembly that this application embodiment provided, the assembly is convenient, and the structure is reliable, and the mode of propping the bulb through first bulb seat is fixed in the inner chamber with the bulb, need not the ball pivot structure of traditional parcel formula, has reduced the size of junction, especially radial ascending size, is favorable to controlling the size of piston rod. And, through the mode that first bulb seat supports the bulb, be convenient for follow-up additional damping structure to reduce vibrations, noise scheduling problem in the course of the work.

The braking system that this application embodiment provided has aforementioned push rod assembly, and power transmission is stable smooth and easy, and overall structure is simple relatively, and the operational reliability is high.

The vehicle provided by the embodiment of the application has the advantages of vibration and low noise in the driving process, and the user satisfaction is high.

Other features and advantages of the present application will be set forth in the description that follows.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

FIG. 1 is a schematic view of a push rod assembly according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of the ball head of the main push rod in fig. 1.

Illustration of the drawings:

1-main push rod, 11-ball head, 12-connecting rod, 2-piston rod, 21-inner cavity, 3-first ball head seat, 31-first plane, 32-first spherical surface, 4-limiting piece, 5-second ball head seat, 51-second plane, 52-second spherical surface, 61-first gap, 62-second gap, 7-damping piece and 8-pedal.

Detailed Description

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Present ball pivot structure, except the problem in the aspect of the size, still there is vibrations great, produces the problem of great noise easily: the spherical hinge structure is difficult to add damping components such as elastic parts, and the problems of serious vibration and noise exist when the assembly precision is relatively low.

An embodiment of the present application provides a push rod assembly, as shown in fig. 1 and fig. 2, the push rod assembly includes a main push rod, a piston rod, a first ball seat and a limiting member, the piston rod is connected to the main push rod and moves along with the main push rod; an inner cavity is formed in one end of the piston rod, the main push rod comprises a ball head arranged at one end, and the ball head extends into the inner cavity; the first ball head seat is matched with the spherical surface of the ball head and can rotationally fix the ball head in the inner cavity, and the ball head seat is fixed in the inner cavity by the limiting piece so as to limit the ball head and the ball head seat from falling out of the inner cavity.

The main push rod penetrates the braking force at the pedal into a subsequent main cylinder through a piston rod so as to brake.

The main push rod is connected with the piston rod, and the joint enables the piston rod of the main push rod to rotate relatively at a certain angle so as to be matched with the pedal to rotate and push, in other words, the main push rod and the piston rod are not always positioned on the same straight line in the movement process, and a certain included angle may exist between the main push rod and the piston rod.

The rear end of the main push rod is provided with a ball head, an inner cavity for accommodating the ball head is arranged in the piston rod, and the ball head is rotationally fixed in the inner cavity, so that the main push rod and the piston rod are connected to push each other, and relative rotation of a small angle between the main push rod and the piston rod can be ensured by taking the ball head as a circle center. Specifically, the first ball head seat is provided with a spherical surface matched with the ball head so as to fix the ball head in the inner cavity in a rotatable manner, so that the piston rod and the main push rod are limited in the axial direction and move together in the axial direction.

The limiting piece has the functions of installation and limiting, and can directly abut against the first ball socket seat to enable the first ball socket seat to be limited and fixed; the first ball head seat is propped against the ball head of the main push rod, so that the ball head is limited in the inner cavity, and the piston rod is movably connected with the main push rod.

The limiting part can be a clamping ring, a disconnected interface is arranged on the clamping ring, an installation clamping groove is arranged on the inner wall of the inner cavity, and the clamping ring is installed in the installation clamping groove to abut against the ball head seat along the axial direction so as to prevent the ball head and the ball head seat from being separated from the inner cavity.

The push rod subassembly in this application embodiment, through "in the inner chamber of piston rod is rotationally fixed in with the bulb to first bulb seat", replaced current ball pivot structure, be favorable to dwindling the overall size of connection structure department, especially radial dimension: the first ball head seat can abut against the ball head without covering the ball head like the existing ball hinge structure.

In an exemplary embodiment, as shown in fig. 1 and 2, the putter assembly further includes a second ball socket disposed at the bottom of the inner cavity, and the first ball socket and the second ball socket are respectively located at two sides of the ball head to clamp the ball head for limiting.

The first ball head seat is arranged at the front end of the ball head, the second ball head seat is arranged at the rear end of the ball head, the first ball head seat and the second ball head seat are respectively arranged at two sides of the ball head and are abutted against the ball head from two sides, and a spherical surface matched with the ball head can be arranged on the second ball head seat, so that the ball head is stressed uniformly in the inner cavity and rotates smoothly.

The second ball head seat can be directly fixed at the bottom of the inner cavity and forms an integral structure with the piston rod. Such as: the rear end of the second ball head seat can be provided with a protruding structure, the bottom of the inner cavity is correspondingly provided with a groove structure, and the protruding structure extends into the groove structure and is fixedly bonded, so that the second ball head seat is fixedly connected with the piston rod. The second ball head seat is fixedly connected with the piston rod, in other words, the problems of clearance, noise caused by mutual impact and the like do not exist between the ball head seat and the piston rod.

The split ball seat mode of the first ball seat and the second ball seat replaces the existing ball hinge structure, the space of the inner cavity is fully utilized, the connecting structure is simplified, and the size of the connecting position is reduced.

In an exemplary embodiment, a maximum central angle of the first headstock relative to a spherical surface contacted by the ball head is less than 180 °, and/or a maximum central angle of the second headstock relative to a spherical surface contacted by the ball head is less than 180 °.

As shown in fig. 2, the portion of the first ball seat in contact with the ball head is a spherical surface, and the spherical surface of the contact portion is smaller than half of the overall spherical surface of the ball head, in other words, the maximum central angle α corresponding to the spherical surface of the contact portion is smaller than 180 °, so that the radial dimension of the first ball seat is prevented from exceeding the diameter dimension of the ball head too much, the radial dimension of the first ball seat is made to approach the diameter dimension of the ball head as much as possible, the overall dimension, especially the radial dimension, of the connection structure of the "ball head + the first ball seat" is reduced, and the radial dimension of the piston rod is favorably controlled.

The second ball cup is the same as the first ball cup, and the description thereof is omitted.

In an exemplary embodiment, as shown in fig. 2, the end surface of the first ball cup includes a first plane and a first spherical surface, and the first plane is located outside the first spherical surface; the second ball head seat comprises a second plane and a second spherical surface, and the second plane is positioned on the outer side of the second spherical surface; a first gap is arranged between the first plane and the second plane.

The ball head is positioned between the first spherical surface and the second spherical surface and is clamped and propped against by the first spherical surface and the second spherical surface, and the ball head can rotate.

A first gap is provided between the first plane and the second plane, in other words, the first ball seat and the second ball seat are not in contact and are separated by the ball head.

The first ball seat and the second ball seat are not in contact at the highest point and the lowest point of the ball head, so that the ball head is prevented from being covered at the highest point and the lowest point of the ball head, and the overall size of the ball head and the ball seat, particularly the radial size (the size in the upper-lower direction in fig. 2), is reduced.

In an exemplary embodiment, as shown in fig. 2, the putter assembly further includes a damping member disposed between the first ball cup and the limiting member.

A damping part is arranged between the first ball head seat and the limiting part, so that the phenomenon that the second ball head seat, the ball head, the first ball head seat and the limiting part are impacted to generate noise in the moving process of the main push rod is avoided.

The damping piece is arranged between the first ball head seat and the limiting piece, the damping effect is achieved, meanwhile, the damping piece cannot be abraded by the rotatable ball head, and the working reliability of the damping piece is guaranteed.

In an exemplary embodiment, as shown in fig. 2, the damping member is installed between the first ball cup and the limiting member in an interference manner, so that the first ball cup abuts against the ball head.

After the shock absorbing piece is arranged, the shock absorbing piece is installed between the first ball head seat and the limiting piece in an interference mode, so that gaps among the second ball head seat, the ball head, the first ball head seat and the limiting piece are eliminated, further, the phenomenon that noise is generated due to mutual impact among all components due to the fact that axial gaps exist in the movement process of the main push rod is avoided, in addition, after the gaps are eliminated, the working reliability and the service life of the ball head can be improved, and the feedback effect of user braking is improved.

The pretightening force of the damping piece during installation can be adjusted according to actual needs.

The shock absorbing member may be an elastic member such as: a rubber spring pad; of course, in some cases, the shock absorbing member may be a spring.

When the pedal is loosened, the return function of the elastic piece pushes the main push rod and the pedal to return to the original position, and the elastic piece plays a role in shock absorption and noise reduction.

In an exemplary embodiment, as shown in fig. 2, the main push rod includes a connecting rod and a ball head, the ball head is disposed at an end of the connecting rod; the connecting rod passes through the first ball head seat, the damping piece and the limiting piece and extends out of the inner cavity; be provided with the second clearance between damper and the connecting rod, and the second clearance sets up to: the connecting rod is abutted against the damping piece before colliding with the first ball head seat, the limiting piece and the piston in the rotating process.

The shock-absorbing piece can eliminate the axial clearance to prevent each component from impacting in the axial direction, and can prevent the connecting rod from colliding with the first ball socket, the limiting piece and the piston in the radial direction.

When the pedal is fully treaded, the main push rod and the piston rod are not in a straight line, and the main push rod is inclined to a certain extent at the moment. As shown in fig. 1, when the pedal is not yet depressed; when the pedal is completely treaded, the pedal rotates clockwise, the main push rod moves leftwards, the height of the right end of the main push rod is increased, the height of the left end of the main push rod is unchanged, but the position of the left end of the main push rod is relatively low, and a certain included angle is formed between the main push rod and the horizontal direction.

Under the condition that the pedal is completely stepped on, the connecting rod can be abutted against the inner ring of the damping piece, the damping piece plays a certain limiting role on the connecting rod, the connecting rod is prevented from colliding with the first ball seat, the limiting piece and the piston, and unnecessary abrasion is avoided.

In practical applications, the inner diameter of the shock absorbing member is smaller than the inner diameters of the first ball cup and the limiting member, so as to prevent the connecting rod from colliding with the first ball cup or the limiting member during the rotation process, in other words, the gap between the shock absorbing member and the connecting rod is smaller, and the gap between the first ball cup, the limiting member and the connecting rod is relatively larger, so that the connecting rod contacts the shock absorbing member before colliding with the first ball cup or the limiting member, so as to avoid unnecessary wear.

In an exemplary embodiment, the shock absorbing member is an annular member; the axial length of the damping member is 4-5mm and/or the inner diameter of the damping member is 8-9mm.

The shock-absorbing member may be a ring-shaped member for the connection rod to pass through. The axial length of the damping member may be 4-5mm and the diameter of the opening may be 8-9mm. Certainly, in practical application, the actual size of the shock absorbing member can be adjusted according to different specific application scenes, and the application does not limit the actual size.

The embodiment of the application also provides a braking system, which comprises a pedal, a main cylinder and the push rod assembly, wherein the pedal is connected with one end of the main push rod, which is not provided with the ball head, and the piston is matched with the main cylinder.

When the pedal is subjected to braking force, the braking force is transmitted to a main push rod of the intelligent booster, and the main push rod pushes a piston rod to move towards a main cylinder to compress brake fluid, so that the brake fluid is matched with a simulator to generate pedal feeling matched with the braking force; meanwhile, the intelligent booster receives the braking intention and pushes the electric main cylinder to compress the brake fluid through the motor so as to provide braking assistance.

The vehicle provided by the embodiment of the application vibrates and has small noise in the driving process, and the use experience of a user is good.

In the description of the present application, it is to be noted that the directions or positional relationships indicated by "upper", "lower", "one end", "one side", and the like are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and do not indicate or imply that the structures referred to have a specific direction, are configured and operated in a specific direction, and thus, cannot be construed as limiting the present application.

In the description of the embodiments of the present application, unless expressly stated or limited otherwise, the terms "connected," "mounted," and "mounted" are to be construed broadly, e.g., the term "connected" may be a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The embodiments described herein are exemplary rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed herein may also be combined with any conventional features or elements to form a unique solution as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other aspects to form another unique aspect as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.

Claims

1. A push rod assembly is characterized by comprising a main push rod, a piston rod, a first ball head seat and a limiting piece, wherein the piston rod is connected with the main push rod and moves along with the main push rod;

2. The putter assembly of claim 1, further including a second ball cup disposed at a bottom of the cavity, the first ball cup and the second ball cup being disposed on opposite sides of the ball head to retain the ball head.

3. The putter assembly of claim 2 wherein the first ball cup has a maximum central angle of less than 180 ° with respect to a spherical surface contacted by the ball head and/or the second ball cup has a maximum central angle of less than 180 ° with respect to a spherical surface contacted by the ball head.

4. The putter assembly of claim 2, wherein the end surface of the first ball socket includes a first plane and a first spherical surface, the first plane being located outboard of the first spherical surface; the second ball cup comprises a second plane and a second spherical surface, and the second plane is positioned on the outer side of the second spherical surface;

a first gap is arranged between the first plane and the second plane.

5. The putter assembly of claim 1, further comprising a dampening member disposed between the first ball cup and the retainer.

6. The putter assembly of claim 5, wherein the dampening member is interference mounted between the first ball cup and the retaining member such that the first ball cup abuts the ball head.

7. The pushrod assembly of claim 5, wherein the primary pushrod comprises a connecting rod and the ball head, the ball head disposed at an end of the connecting rod;

8. The pushrod assembly of claim 5, wherein the shock absorbing member is an annular member;

9. A braking system comprising a pedal connected to the end of the primary tappet not provided with the ball head, a master cylinder to which the piston is engaged, and a tappet assembly according to any one of claims 1 to 8.

10. A vehicle comprising a braking system according to claim 9.