CN113246928B

CN113246928B - Brake input device and automobile brake system

Info

Publication number: CN113246928B
Application number: CN202110751170.3A
Authority: CN
Inventors: 李丰军; 周剑光; 卜祥阳
Original assignee: China Automotive Innovation Co Ltd
Current assignee: China Automotive Innovation Co Ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2022-09-27
Anticipated expiration: 2041-07-02
Also published as: CN113246928A

Abstract

The invention belongs to the field of automobile braking, and provides a brake input device and an automobile braking system, wherein the brake input device comprises a piston, an actuating rod and a force transmission assembly, and one end of the piston is provided with an accommodating cavity; the actuating rod comprises a ball head; the force transmission assembly comprises a blocking piece and an elastic piece which are arranged in the accommodating cavity, the blocking piece is sleeved on the actuating rod, and the elastic piece is arranged on the axial outer side of the blocking piece; a ball head groove for supporting part of the ball head is also arranged in the accommodating cavity and is positioned on the axial inner side of the blocking piece; the blocking piece comprises a first limiting groove for accommodating part of the ball head, the first limiting groove is positioned at one end, close to the ball head groove, of the blocking piece, and the first limiting groove allows the ball head to rotate in the first limiting groove and limits the ball head to be separated from the blocking piece towards the axial outer side. The brake input device simplifies the structure and the assembly steps of the brake input device, reduces the production cost and improves the production efficiency while realizing the braking of the automobile and driving the actuating rod to reset.

Description

Brake input device and automobile brake system

Technical Field

The invention relates to the field of automobile braking, in particular to a brake input device and an automobile braking system.

Background

Integrated brake systems have been developed in recent years because they allow linear control of the brake, with the pedal input lever structure being one of the important components connecting the brake pedal to the piston. The pedal input rod structure takes a pedal push rod as a transmission medium of pedal input force, and the pedal force is applied to a ball seat arranged in a piston through the pedal push rod so as to push the piston to move and generate braking pressure.

The existing pedal input rod structure mainly comprises a disc-shaped wave spring, a ball head limiting part, an input rod, an anti-drop ring and the like, the input rod penetrates through the ball head structure and is clamped in the ball head limiting part, the input rod is limited in a piston cavity through the anti-drop ring and the like, the wave spring and the disc-shaped spring are both sleeved on the input rod, the wave spring is used for realizing the swinging of the input rod, and the disc-shaped spring is used for providing pre-tightening force for enabling the input rod to reset. However, the structure is complex, the number of parts is large, the assembly steps are complicated, the assembly difficulty is high, the production cost is high, and the production efficiency is low; in addition, the spring and the piston are metal pieces, the spring is easily abraded with the inner wall of the piston, the spring and the piston are caused to lose efficacy, the service life of the pedal input rod structure is shortened, and the maintenance cost of the pedal input rod structure is increased.

Disclosure of Invention

An object of the present invention is to provide a brake input device, so as to solve the problems of the prior art, such as complicated structure, large number of parts, complicated assembly steps, low production efficiency, short service life and high production cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a brake input device comprising:

the piston is provided with an accommodating cavity at one end;

an actuating lever comprising a ball head;

the force transmission assembly comprises a blocking piece and an elastic piece which are arranged in the accommodating cavity, the blocking piece is sleeved on the actuating rod, and the elastic piece is arranged on the axial outer side of the blocking piece;

the brake input device further includes:

a ball head groove for supporting part of the ball head is further arranged in the accommodating cavity and is positioned on the axial inner side of the blocking piece;

the blocking piece comprises a first limiting groove for accommodating part of the ball head, the first limiting groove is positioned at one end, close to the ball head groove, of the blocking piece, and the first limiting groove allows the ball head to rotate in the first limiting groove and limits the ball head to be separated from the blocking piece towards the axial outer side.

Optionally, the axial depth of the ball head groove is D, the radius of the ball head is R, and D is less than or equal to R.

Optionally, the axially inner side of the first limiting groove is a first notch, the axially outer side of the first limiting groove is a second notch, and if the inner diameter of the first notch is r1 and the inner diameter of the second notch is r2, r1 > r 2.

Optionally, the ball socket and the first limit groove together enclose a ball socket.

Optionally, the force transmission assembly further includes a support seat, the ball groove is formed in the support seat, and the support seat and the piston are integrally formed or separately formed;

the supporting seat is made of metal materials, and the blocking piece is a metal piece or a plastic piece.

Optionally, the force transmission assembly further includes a limiting sleeve, the elastic member is disposed between the blocking member and the limiting sleeve, and the limiting sleeve can limit the elastic member to be separated from the accommodating cavity.

Optionally, the blocking member is configured to be acted by the actuating rod to move in a direction away from the supporting seat, and the blocking member is further configured to be acted by the elastic member to return in a direction close to the supporting seat, and the elastic member is a rubber ring.

Optionally, be equipped with on the inner wall that holds the chamber and follow the axially extended second spacing groove that holds the chamber, spacing cover is equipped with spacing arch, spacing arch is followed the axial slip that holds the chamber is located in the second spacing groove.

Optionally, the brake input device further includes a swing limiting member, and the swing limiting member is disposed on a radial inner side of the limiting sleeve and/or the blocking member.

Optionally, the swing limiting member is a retaining ring sleeved on the actuating rod, or the swing limiting member is an annular rib arranged on an inner circumferential surface of the blocking member and/or the limiting sleeve.

An automotive brake system comprising:

the pressure cavity is formed in the shell;

the brake input device is the brake input device, wherein the brake lever can drive the piston to move in the accommodating cavity with an actuating force.

The invention has the beneficial effects that:

the invention aims to provide a brake input device and an automobile brake system, wherein a ball head groove is arranged in a containing cavity, a first limit groove is arranged on a barrier piece, the ball head groove is positioned on the axial inner side of the barrier piece, and the first limit groove is positioned at one end, close to the ball head groove, of the barrier piece.

The invention applies pre-tightening force to the ball head of the actuating rod to enable the ball head to be located in the ball head groove on one hand and applies restoring force to the actuating rod to enable the actuating rod to reset after the actuating rod moves by arranging the elastic piece. After the car accomplished the braking, the restoring force that acts on the actuating lever can drive the actuating lever and restore to the throne rapidly along the direction of the restoring force, in this process, the surface butt of bulb in first spacing groove, and drive separation piece and slide along the direction of the restoring force, first spacing groove can restrict the bulb and break away from in separation piece to the axial outside, the elastic component sets up in the axial outside of separation piece, the bulb groove is kept away from along the relative separation piece of the axial that holds the chamber to the elastic component promptly, thereby guarantee that separation piece effectively extrudees the elastic component, the elastic component consumes partly restoring force from separation piece transmission to the elastic component, thereby reduce the restoring force of transmission to the piston, with the impact of effectively reducing the piston to the piston positioning seat, with the structural integrity of protection piston positioning seat, improve the working life of piston positioning seat. Compared with the pedal input rod structure in the prior art, the pedal input rod structure is simple in structure, few in parts, easy to assemble and simple in assembly steps, so that the production cost is reduced, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a brake input device according to an embodiment of the present invention;

FIG. 2 is an exploded view of a brake input device provided in accordance with an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a blocking member of a brake input device according to an embodiment of the present invention.

In the figure:

1. a piston; 11. an accommodating chamber; 111. a second limit groove;

2. an actuating lever; 21. a ball head;

31. a barrier; 311. a first limit groove; 3111. a first notch; 3112. a second notch; 32. an elastic member; 33. a supporting seat; 331. a ball head groove; 34. a limiting sleeve; 341. a limiting bulge;

4. and a swing limiting piece.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

At present, most of small vehicles adopt hydraulic braking, and the basic principle of automobile braking is that a driver steps on a brake pedal to apply pressure to brake oil in a brake master cylinder, the pressure is transmitted to a piston of each wheel brake caliper through a pipeline by liquid, and the piston drives the brake calipers to clamp a brake disc so as to generate huge friction force to decelerate the vehicle. The pedal input rod structure is a part for connecting the brake pedal and the brake master cylinder, and the pedal input rod acts on the brake master cylinder to generate hydraulic pressure so as to ensure that the vehicle generates enough deceleration.

Example one

The present invention provides a brake input device, as shown in fig. 1 to 3, which includes a piston 1, an actuating rod 2, and a force transmission assembly, the piston 1 being located in a brake cylinder (not shown in the drawings) to output brake fluid to the outside by moving the piston 1, the piston 1 being provided at one end with a receiving chamber 11.

One end of the actuating rod 2 is connected to the receiving space 11 in order to drive the piston 1 in motion, the actuating rod 2 comprising a ball 21. The other end of the actuating rod 2 is in transmission connection with a brake pedal of the automobile, and when a driver steps on the brake pedal, the brake pedal can drive the actuating rod 2 to move and drive the piston 1 to move towards the left side in the figure 1, so that the brake cylinder outputs brake fluid to the wheel brake.

The other end of the piston 1 opposite to the receiving cavity 11 is provided with a spring cavity, in which a piston return spring is normally mounted, the piston return spring providing a return force for driving the piston 1 to return after the actuating rod 2 exerts no force.

As shown in fig. 1 and 2, the force transmission assembly includes a blocking member 31 and an elastic member 32 disposed in the accommodating cavity 11, the blocking member 31 is sleeved on the actuating rod 2, and the elastic member 32 is disposed on an axial outer side of the blocking member 31 (wherein a side of the accommodating cavity 11 away from the opening of the accommodating cavity 11 is an axial inner side, and a side close to the opening of the accommodating cavity 11 is an axial outer side).

As shown in fig. 2, a ball head groove 331 for supporting a portion of the ball head 21 is further disposed in the accommodating cavity 11, and the ball head groove 331 is located at an axially inner side of the blocking member 31; the blocking member 31 includes a first limiting groove 311 for accommodating a part of the ball 21, the first limiting groove 311 is located at one end of the blocking member 31 close to the ball groove 331, and the first limiting groove 311 allows the ball 21 to rotate in the first limiting groove 311 and limits the ball 21 to be separated from the blocking member 31 to the outside in the axial direction. It will be appreciated that the ball recess 331 is located at a position axially of the receiving cavity 11 and away from the opening of the receiving cavity 11 relative to the blocking member 31, and by providing the ball 21 to be rotatable in the first limiting recess 311, the actuating lever 2 is ensured to be pivotable within a certain range, for example, the actuating lever 2 is deflected within ± 3 ° about the piston axis, thereby allowing the brake pedal connected to the actuating lever 2 to move circumferentially.

When braking is needed, the brake pedal drives the brake rod 2 to move towards the left side in fig. 1, the ball 21 of the actuating rod 2 abuts against the ball groove 331 and drives the piston 1 to move along the direction of the input force, so that the brake cylinder outputs brake fluid outwards, and braking of the automobile is achieved; after the automobile is braked, the piston 1 drives the actuating rod 2 to move to the right side in fig. 1 under the action of a piston return spring (not shown in the figure), so that a return force acting on the actuating rod 2 can drive the actuating rod 2 to quickly return in the direction of the return force, in the process, the surface of the ball head 21 abuts against the first limiting groove 311 and drives the blocking member 31 to slide in the direction of the return force, the first limiting groove 311 can limit the ball head 21 to be separated from the blocking member 31 to the axial outer side, the elastic member 32 is arranged on the axial outer side of the blocking member 31, namely the elastic member 32 is far away from the ball head groove 331 relative to the blocking member 31 in the axial direction of the accommodating cavity 11, so that the impact of the piston 1 on the piston positioning seat is effectively relieved, the structural integrity of the piston positioning seat is protected, and the service life of the piston positioning seat is prolonged. Compared with the pedal input rod structure in the prior art, the pedal input rod structure is simple in structure, few in parts, easy to assemble and simple in assembly steps, so that the production cost is reduced, and the production efficiency is improved.

The direction of the input force and the direction of the return force are opposite and are both parallel to the axial direction of the accommodating cavity 11, the direction of the input force is towards the left direction in fig. 1, and the direction of the return force is towards the right direction in fig. 1.

Specifically, as shown in fig. 1 and 2, the axial depth of the ball head groove 331 is D, the radius of the ball head 21 is R, and D ≦ R. Through so setting up, guarantee that bulb 21 can effectively assemble in bulb groove 331 to guarantee that bulb 21 can be supported in bulb groove 331. It will be appreciated that if D > R, the ball 21 cannot fit into the ball groove 331.

Specifically, as shown in fig. 1 and 3, the axially inner side of the first stopper groove 311 is a first notch 3111, the axially outer side of the first stopper groove 311 is a second notch 3112, and if the inner diameter of the first notch 3111 is r1 and the inner diameter of the second notch 3112 is r2, r1 > r 2. It can be understood that the first notch 3111 of the first limiting groove 311 is close to the ball groove 331 relative to the second notch 3112, and r1 > r2 is provided to ensure that the ball 21 can effectively abut against the limiting groove, so that the blocking member 31 can ensure that the actuating rod 2 is prevented from being disengaged outwards along the axial direction of the accommodating cavity 11.

Specifically, as shown in fig. 1-3, the ball socket 331 and the first limit socket 311 together enclose a ball socket. The ball 21 of the actuating lever 2 is spherical-hinged in the ball socket to completely define the assembly position of the actuating lever 2 along the axis of the housing 11, preventing the actuating lever 2 from coming out of the blocking member 31. In the present embodiment, the inner wall of the first limiting groove 311 is substantially configured as a spherical surface, the inner wall of the ball head groove 331 is substantially configured as a hemispherical surface, and the first limiting groove 311 is configured as a spherical surface, that is, both the first limiting groove 311 and the ball head 21 are configured as spherical surfaces, so as to increase the contact area of the ball head 21 contacting with the groove wall of the first limiting groove 311, thereby further limiting the ball head 21 from separating from the blocking member 31 to the axial outside.

Specifically, as shown in fig. 1 and 2, the force transmission assembly further includes a support seat 33, a ball groove 331 is formed in the support seat 33, and the support seat 33 is integrally or separately formed with the piston 1; the supporting seat 33 is made of a metal material, for example, the supporting seat 33 is made of medium carbon steel or stainless steel, and the blocking member 31 is a metal member or a plastic member, for example, the blocking member 31 is made of medium carbon steel or stainless steel or high-strength plastic. It can be understood that the actuating rod 2 transmits the input force to the supporting seat 33, and the supporting seat 33 made of metal material can improve the structural strength of the supporting seat 33, and is not easy to deform or wear, so as to improve the service life of the supporting seat 33 and reduce the maintenance or replacement frequency of the supporting seat 33; the first stopper groove 311 of the barrier 31 supports and stops the ball 21 from being separated from the barrier 31 to the outside in the axial direction, and the elastic member 32 is disposed on the outside in the axial direction of the barrier 31, so that the support strength and the wear resistance of the barrier 31 can be ensured by manufacturing the barrier 31 from a metal material or a high-strength plastic material.

Wherein, through setting up supporting seat 33 and piston 1 integrated into one piece, can further simplify this braking input device's structure, further reduce spare part quantity, it is simple to simplify the assembly step to further reduction in production cost improves production efficiency. As an alternative, the support seat 33 and the piston 1 are formed separately, which facilitates the later replacement and maintenance of the brake input device.

As shown in fig. 1 and 2, the force transmission assembly further includes a position-limiting sleeve 34, the elastic element 32 is disposed between the blocking element 31 and the position-limiting sleeve 34, and the position-limiting sleeve 34 can limit the elastic element 32 to be separated from the accommodating cavity 11. It can be understood that, in the direction of the return force, the supporting seat 33, the blocking member 31, the elastic member 32 and the stop collar 34 are sequentially arranged in the accommodating cavity 11, so that the movement range of the actuating rod 2, the blocking member 31 and the elastic member 32 along the axial direction of the accommodating cavity 11 is limited, and the actuating rod 2, the blocking member 31 and the elastic member 32 are prevented from being removed from the accommodating cavity 11.

The blocking member 31 is configured to be moved away from the supporting seat 33 by the actuating rod 2, and the blocking member 31 is further configured to be reset toward the supporting seat 33 by the elastic member 32, in the embodiment of the present invention, the elastic member 32 is a rubber ring. It can be understood that the elastic member 32 always has a pre-tightening force for driving the blocking member 31 to approach the supporting seat 33, so that the blocking member 31 is in a position of abutting against the supporting seat 33. Of course, as an alternative embodiment, the elastic member 32 may be a spring.

Specifically, when an input force is applied to the actuating rod 2 along the axial direction of the accommodating cavity 11, the elastic force of the elastic member 32 drives the blocking member 31 to move toward the supporting seat 33, so that the blocking member 31 abuts against the supporting seat 33, and the ball 21 is completely located in the ball socket formed by the ball groove 331 and the first limiting groove 311. On the other hand, after braking is completed, the elastic piece 32 can effectively offset a part of impact force transmitted from the blocking piece 31 to the elastic piece 32, so that the impact force transmitted to the piston 1 is reduced, the impact of the piston 1 on the piston positioning seat is effectively reduced, the structural integrity of the piston positioning seat is protected, and the service life of the piston positioning seat is prolonged. Further, through setting up elastic component 32 and being the rubber circle, for the spring among the prior art, the rubber circle can not cause wearing and tearing to the lateral wall that holds the chamber 11 of piston 1 in long-term operation process on the one hand, can further improve the life of piston 1, reduces the frequency that piston 1 maintained or changed to further improve the life of this brake input device, reduced this brake input device's cost of maintenance. On the other hand, the rubber ring has lower cost and simpler and more convenient assembly compared with the spring.

As shown in fig. 1 and fig. 2, a second limiting groove 111 extending along the axial direction of the accommodating chamber 11 is provided on the inner wall of the accommodating chamber 11, a limiting protrusion 341 is provided on the limiting sleeve 34, and the limiting protrusion 341 is slidably provided in the second limiting groove 111 along the axial direction of the accommodating chamber 11. Specifically, after the automobile is braked, the return force acting on the actuating rod 2 drives the actuating rod 2 to be quickly returned along the direction of the return force, so that the blocking member 31, the elastic member 32 and the stop collar 34 are driven to slide along the direction of the return force, the second limit groove 111 extending along the axial direction of the accommodating cavity 11 is arranged on the inner wall of the accommodating cavity 11, the stop boss 341 is arranged on the stop collar 34, the stop boss 341 on the stop collar 34 abuts against the side wall, close to the opening, of the second limit groove 111, so that the movement range of the stop collar 34 is effectively limited, the actuating rod 2, the blocking member 31 and the elastic member 32 are prevented from being disengaged from the accommodating cavity 11, and meanwhile, the reliability of the brake input device of the automobile brake system is ensured.

The stop collar 34 of the embodiment of the present invention is a plastic retainer ring. For example, the stop collar 34 is made of 70% nylon and 30% glass fiber, and it is understood that the ratio of nylon to glass fiber can be adjusted according to actual requirements. A part of the impact force transmitted to the plastic check ring by the elastic element 32 is consumed, so that the stop collar 34 only needs to bear the rest impact force, and the rest return force is small, so that the stop collar 34 made of the plastic material can effectively bear the impact force transmitted to the stop collar 34 by the elastic element 32; meanwhile, the limit sleeve 34 made of nylon material has less abrasion to the side wall of the accommodating cavity 11 of the piston 1 in the long-term operation process, so that the service life of the piston 1 can be further prolonged, and the frequency of maintenance or replacement of the piston 1 is reduced, thereby further prolonging the service life of the brake input device and reducing the maintenance cost of the brake input device; and the cost of the plastic material is low, so that the production cost can be further reduced. In other embodiments, the stop collar 34 may be made of a metal material.

As shown in fig. 1 and 2, the brake input device further includes a swing limiting member 4, and the swing limiting member 4 is disposed radially inside the stop sleeve 34 and/or the blocking member 31. By providing the swing limit 4 radially inside the stop collar 34 and/or the blocking element 31, the swing limit 4 can limit the range of motion of the actuating lever 2 in the radial direction of the accommodating cavity 11, ensuring that the actuating lever 2 can be braked effectively and reset effectively.

The swing limiting member 4 is a retaining ring sleeved on the actuating rod 2, or the swing limiting member 4 is an annular convex rib arranged on the inner circumferential surface of the blocking member 31 and/or the limiting sleeve 34. The swing limiting piece 4 is a check ring sleeved on the actuating rod 2, and the radial direction of the accommodating cavity 11 of the check ring can effectively limit the movement range of the actuating rod 2. As an alternative, the swing limiting member 4 is an annular rib provided on the inner circumferential surface of the blocking member 31 and/or the limiting sleeve 34, and the annular rib is effective to limit the movement range of the actuating lever 2. In the present embodiment, the range of movement of the actuating lever 2 in the radial direction of the accommodating chamber 11 is limited by providing an annular rib on the inner peripheral surface of the stopper sleeve 34.

The annular convex rib integrally forms the inner peripheral surface of the blocking member 31 and/or the stop collar 34, or the annular convex rib and the blocking member 31 and/or the stop collar 34 are formed separately. The structure of the brake input device can be further simplified by integrally forming the annular convex rib on the inner peripheral surface of the barrier 31 and/or the inner peripheral surface of the limiting sleeve 34, the number of parts is further reduced, the assembly steps are simplified, the production cost is further reduced, and the production efficiency is improved. As an alternative, the annular rib is formed separately from the blocking member 31 and/or the stop collar 34, so that the annular rib, the blocking member 31 and the stop collar 34 can be processed conveniently, and meanwhile, the later maintenance and the maintenance of the parts of the brake input device can be facilitated.

Example two

In another embodiment of the present invention, an automobile brake system is provided, which includes the brake input device of the first embodiment, and further includes a housing, a pressure chamber is formed in the housing, and the actuating rod 2 can drive the piston 1 to move in the pressure chamber with an actuating force. Wherein, the braking force is input force or return force. Specifically, when an input force is applied to the actuating rod 2 in the axial direction of the accommodating cavity 11, the ball 21 of the actuating rod 2 abuts against the ball groove 331 and drives the piston 1 to move in the direction of the input force, so that the brake cylinder outputs brake fluid to the outside to brake the automobile; after the automobile is braked, the piston 1 drives the actuating rod 2 to move towards the right side in fig. 1 under the action of a piston return spring (not shown in the figure), so that a return force acting on the actuating rod 2 can drive the actuating rod 2 to quickly return along the direction of the return force, in the process, the surface of the ball head 21 abuts against the first limiting groove 311 and drives the blocking member 31 to slide along the direction of the return force, the first limiting groove 311 can limit the ball head 21 to be separated from the blocking member 31 towards the axial outer side, the elastic member 32 is arranged on the axial outer side of the blocking member 31, and the elastic member 32 is far away from the ball head groove 331 relative to the blocking member 31 along the axial direction of the accommodating cavity 11, so that the impact of the piston 1 on the piston positioning seat is effectively relieved, the structural integrity of the piston positioning seat is protected, and the service life of the piston positioning seat is prolonged. Compared with the pedal input rod structure in the prior art, the pedal input rod structure is simple in structure, few in parts, easy to assemble and simple in assembly steps, so that the production cost is reduced, and the production efficiency is improved.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A brake input device comprising:

the piston comprises a piston (1), wherein one end of the piston (1) is provided with an accommodating cavity (11);

an actuating lever (2), the actuating lever (2) comprising a ball head (21);

the force transmission assembly comprises a blocking piece (31) and an elastic piece (32) which are arranged in the accommodating cavity (11), the blocking piece (31) is sleeved on the actuating rod (2), and the elastic piece (32) is arranged on the axial outer side of the blocking piece (31);

it is characterized in that the preparation method is characterized in that,

a ball head groove (331) for supporting a part of the ball head (21) is further arranged in the accommodating cavity (11), and the ball head groove (331) is positioned on the axial inner side of the blocking piece (31);

the blocking piece (31) comprises a first limiting groove (311) for accommodating a part of the ball head (21), the first limiting groove (311) is positioned at one end, close to the ball head groove (331), of the blocking piece (31), and the first limiting groove (311) allows the ball head (21) to rotate in the first limiting groove (311) and limits the ball head (21) to be separated from the blocking piece (31) towards the axial outer side;

the blocking piece (31) is arranged to be acted by the actuating rod (2) to move towards the axial outer side, and the blocking piece (31) is also arranged to be acted by the elastic piece (32) to reset towards the axial inner side;

the elastic piece (32) exerts pretightening force on the ball head (21) to enable the ball head to be located in the ball head groove, and the elastic piece (32) is a rubber ring.

2. The brake input device of claim 1, wherein the ball recess (331) has an axial depth D and the ball (21) has a radius R, D ≦ R.

3. The brake input device of claim 1, wherein the axially inner side of the first retaining groove (311) is a first notch (3111), the axially outer side of the first retaining groove (311) is a second notch (3112), and if the inner diameter of the first notch (3111) is r1 and the inner diameter of the second notch (3112) is r2, then r1 > r 2.

4. The brake input device of claim 1, wherein the ball socket (331) and the first limit socket (311) together enclose a ball socket.

5. The brake input device of claim 1, wherein the force transfer assembly further comprises a support seat (33), the ball groove (331) is formed in the support seat (33), and the support seat (33) is integrally or separately formed with the piston (1);

the supporting seat (33) is made of metal materials, and the blocking piece (31) is a metal piece or a plastic piece.

6. The brake input device according to claim 1, characterized in that the force transmission assembly further comprises a stop collar (34), the elastic member (32) being disposed between the blocking member (31) and the stop collar (34), the stop collar (34) being capable of limiting the elastic member (32) to disengage from the receiving cavity (11).

7. A brake input device according to claim 5, wherein the blocking member (31) is arranged to be movable away from the support seat (33) by the actuator lever (2), the blocking member (31) being further arranged to be resettable towards the support seat (33) by the resilient member (32).

8. The brake input device according to claim 6, wherein a second limit groove (111) extending along the axial direction of the accommodating cavity (11) is formed in the inner wall of the accommodating cavity (11), the limit sleeve (34) is provided with a limit protrusion (341), and the limit protrusion (341) is slidably arranged in the second limit groove (111) along the axial direction of the accommodating cavity (11).

9. The brake input device according to claim 6, further comprising a swing limit (4), wherein the swing limit (4) is provided radially inside the stop collar (34) and/or the blocking member (31).

10. The brake input device according to claim 9, wherein the swing limiting member (4) is a retaining ring sleeved on the actuating rod (2), or the swing limiting member (4) is an annular rib provided on an inner circumferential surface of the blocking member (31) and/or the limiting sleeve (34).

11. A vehicle brake system comprising:

the pressure cavity is formed in the shell;

it is characterized in that the preparation method is characterized in that,

further comprising a brake input device according to any one of claims 1 to 10, wherein the actuating lever (2) is capable of moving the piston (1) in the pressure chamber with an actuating force.