CN219927664U

CN219927664U - Adjustable pedal simulator

Info

Publication number: CN219927664U
Application number: CN202320749387.5U
Authority: CN
Inventors: 刘金雨; 邹常华; 梁宗友; 隋巧梅
Original assignee: DIAS Automotive Electronic Systems Co Ltd
Current assignee: DIAS Automotive Electronic Systems Co Ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-10-31
Anticipated expiration: 2033-04-07

Abstract

The utility model discloses an adjustable pedal simulator, which is used for a brake-by-wire system and comprises: the valve block is formed with a first concave cavity; the simulator piston is accommodated in the first concave cavity, and a first concave part is formed in the simulator piston; a first buffer member is accommodated in the first concave part; the end cover is formed into a barrel shape, and a barrel opening of the end cover is inserted and fixed at the first concave cavity opening; one end of the guiding positioning piece is fixed at the center of the barrel bottom of the end cover; the first elastic piece is sleeved on the guiding and positioning piece, the upper end face of the first elastic piece is propped against the dividing seat, and the lower end face of the first elastic piece is propped against the barrel bottom; the second elastic piece is sleeved on the guide positioning piece, the upper end face of the second elastic piece is propped against the simulator piston, and the lower end face of the second elastic piece is propped against the dividing seat; the dividing seat is positioned between the first elastic piece and the second elastic piece; the transition elastic piece is fixed in the groove of the barrel bottom, is arranged around the guide positioning piece, and the top surface of the transition elastic piece is higher than the top surface of the barrel bottom; the utility model can provide an excellent and smooth transition adjustable pedal feel for a driver.

Description

Adjustable pedal simulator

Technical Field

The utility model relates to the field of automobiles, in particular to an adjustable pedal simulator for a brake-by-wire system.

Background

The linear control system generally adopts a decoupling structure, and the manual driving and the motor control are divided into two independent systems; the motor is controlled to generate braking force to the wheels, and the driver presses the pedal to generate pressure to the pedal feel simulator.

The existing pedal simulator mainly adopts a disc spring combination or a spiral spring and rubber combination, wherein the spiral spring and the rubber are widely used; there are two common forms:

the first is that a small spring is added with simulation rubber, the small spring mainly provides return of a simulator piston, and the rubber mainly provides force feedback of pedal feel; but this feedback is not linear with a hysteresis.

For example, chinese patent CN202221574038.6 discloses a pedal feel simulator and a vehicle, in which a friction member is provided in interference fit with a peripheral wall of a housing chamber, and a cross-sectional area of the housing chamber is gradually reduced, so that there is a hysteresis in pedal return.

The second type provides force feedback of the simulator by combining a small spring and a large spring, and only the final stage is intervened by rubber, so that the pedal feel of metal impact is avoided; however, the abrupt change of the stiffness of the spring in the transition stage of the small spring and the large spring is easy to cause the driver to feel a jerk.

For example, chinese patent CN202210376022.2 discloses a pedal simulator with adjustable pedal force, which comprises a housing, wherein one end of the housing is in an opening structure, a dust cover with sealing function is arranged at one end of the housing, a simulation assembly is arranged inside the housing, the simulation assembly comprises a piston, a spring retainer, a sealing cover, a small spring arranged between the piston and the spring retainer, a large spring and a rubber block arranged between the spring retainer and the sealing cover, and the large spring is sleeved outside the rubber block. The transition stage of the small spring and the large spring can generate a jerky feeling.

Disclosure of Invention

In the summary section, a series of simplified form concepts are introduced that are all prior art simplifications in the section, which are described in further detail in the detailed description section. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The utility model aims to provide an adjustable pedal simulator which is smooth in transition and capable of avoiding hysteresis and setbacks.

In order to solve the above technical problems, the present utility model provides an adjustable pedal simulator for a brake-by-wire system, comprising:

a valve block 2 formed with a first cavity;

a simulator piston 7 accommodated in the first cavity, which is formed with a first recess;

a first cushioning member 1 accommodated in the first recess;

an end cover 9 formed in a barrel shape, wherein a barrel opening of the end cover is inserted and fixed at the first concave cavity opening;

a guiding and positioning piece 10, one end of which is fixed at the center of the barrel bottom of the end cover 9;

the first elastic piece 11 is sleeved on the guiding and positioning piece 10, the upper end face of the first elastic piece is propped against the dividing seat 4, and the lower end face of the first elastic piece is propped against the barrel bottom;

the second elastic piece 3 is sleeved on the guiding and positioning piece 10, the upper end face of the second elastic piece is abutted against the simulator piston 7, and the lower end face of the second elastic piece is abutted against the dividing seat 4;

a dividing seat 4 located between the first elastic member 11 and the second elastic member 3;

a transition elastic member 5 fixed in the groove of the tub bottom, arranged around the guide positioning member 10, and having a top surface higher than the top surface of the tub bottom;

wherein the second elastic member 3 has a stiffness greater than the first elastic member 11.

Optionally, the adjustable pedal simulator is further improved, and further includes:

a cup 6, which fits over the simulator piston 7, isolates the upper chamber of the simulator piston 7 from the lower chamber of the simulator piston 7, which remains sealed as the simulator piston 7 moves.

Optionally, the adjustable pedal simulator is further improved, and the top surface of the transition elastic piece 5 is an arc surface.

a seal 8, located between the end cap 9 and the valve block 2, seals the lower chamber of the simulator piston 7 from the outside.

Optionally, the adjustable pedal simulator is further improved, and the end cover 9 and the valve block 2 are fixed through threads or a clamping ring.

Optionally, the stiffness of the second elastic member 3 of the adjustable pedal simulator is at least 100 times that of the first elastic member 11.

Alternatively, the adjustable pedal simulator first elastic member 11 and the second elastic member 3 are springs.

Optionally, the adjustable pedal simulator is further improved: the transitional elastic member 5 is a rubber ring.

Optionally, the transition elastic member 5 of the adjustable pedal simulator is a plurality of rubber protrusions which are round in shape.

The working principle of the utility model is as follows:

the present utility model provides force feedback loading through a combination of spring and transitional spring (coil spring and rubber) modes of different stiffness.

The simulator spring load is divided into 4 phases:

(1) The first stage is that a large spring and a small spring are connected in series, the rigidity of the large spring is far greater than that of the small spring, and the small spring is compressed preferentially in the early stage;

(2) In the second stage, when the small spring is about to transition to the large spring compression stage, a transition rubber (transition elastic piece) is connected with the small spring in parallel, so that a stiffness value in the middle value of the stiffness of the large spring and the stiffness of the small spring can be provided in a short stroke;

(3) The third stage compresses the big spring, and the rigidity value is larger at the moment, so that a remarkable feeling of increasing the braking force can be provided for a driver;

(4) The fourth stage compresses the big spring and simultaneously connects a transition rubber (transition elastic piece) and the small spring in parallel to provide a great rigidity value, so that a driver can have obvious pedal feel of pedal to the bottom but can not feel abnormal metal impact;

according to the utility model, different pedal feel curves are realized by changing the rigidity of the large spring and adjusting the strokes of the piston and the spring; the brake master cylinder is hydraulically connected with the simulator, when the pedal returns, the friction force of the sealing rubber changes, so that the return of the master cylinder piston and the simulator piston can be kept, the driver can not generate the return top foot feeling, and an excellent and smooth transition adjustable pedal feeling can be provided for the driver.

Drawings

The accompanying drawings are intended to illustrate the general features of methods, structures and/or materials used in accordance with certain exemplary embodiments of the utility model, and supplement the description in this specification. The drawings of the present utility model, however, are schematic illustrations that are not to scale and, thus, may not be able to accurately reflect the precise structural or performance characteristics of any given embodiment, the present utility model should not be construed as limiting or restricting the scope of the numerical values or attributes encompassed by the exemplary embodiments according to the present utility model. The utility model is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a schematic cross-sectional view of the present utility model.

Description of the reference numerals

First cushioning material 1

Valve block 2

Second elastic member 3

Dividing seat 4

Transition elastic piece 5

Leather cup 6

Simulator piston 7

Seal 8

End cap 9

Guide positioning member 10

A first elastic member 11.

Detailed Description

Other advantages and technical effects of the present utility model will become more fully apparent to those skilled in the art from the following disclosure, which is a detailed description of the present utility model given by way of specific examples. The utility model may be practiced or carried out in different embodiments, and details in this description may be applied from different points of view, without departing from the general inventive concept. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. The following exemplary embodiments of the present utility model may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be appreciated that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the technical solution of these exemplary embodiments to those skilled in the art. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Like reference numerals refer to like elements throughout the several views.

A first embodiment;

referring to fig. 1, the present utility model provides an adjustable pedal simulator, comprising:

a valve block 2 formed with a first cavity;

a first cushioning member 1, such as a rubber block, which is accommodated in the first recess;

A second embodiment;

the present utility model provides an adjustable pedal simulator, which is further improved based on the first embodiment, and the same parts are not repeated, and further includes:

Furthermore, it will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments of the present utility model.

A third embodiment;

the present utility model provides an adjustable pedal simulator, which is further improved based on the second embodiment, and the same parts are not repeated;

a seal 8, such as a gasket, is located between the end cap 9 and the valve block 2, which seals the lower chamber of the simulator piston 7 from the outside.

A fourth embodiment;

the present utility model provides an adjustable pedal simulator, which is further improved based on the third embodiment, and the same parts are not repeated;

the top surface of the transition elastic piece 5 is a cambered surface.

Alternatively, the following two possible embodiments of the transition elastic member 5 are provided;

1. the transitional elastic member 5 is a rubber ring.

2. The transition elastic member 5 is a plurality of rubber projections which are rounded.

Further, alternatively, in the first to fourth embodiments, the end cap 9 and the valve block 2 are fixed by threads or a collar.

Further, alternatively, in the above-described first to fourth embodiments, the rigidity of the second elastic member 3 is at least 100 times that of the first elastic member 11.

Further, alternatively, in the first to fourth embodiments described above, the first elastic member 11 and the second elastic member 3 are springs.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The present utility model has been described in detail by way of specific embodiments and examples, but these should not be construed as limiting the utility model. Many variations and modifications may be made by one skilled in the art without departing from the principles of the utility model, which is also considered to be within the scope of the utility model.

Claims

1. An adjustable pedal simulator for a brake-by-wire system, comprising:

a valve block (2) formed with a first cavity;

a simulator piston (7) accommodated in the first cavity, which is formed with a first recess;

a first buffer (1) accommodated in the first recess;

an end cover (9) which is formed into a barrel shape, and the barrel opening of the end cover is inserted and fixed at the first concave cavity opening;

one end of the guiding and positioning piece (10) is fixed at the center of the barrel bottom of the end cover (9);

the first elastic piece (11) is sleeved on the guiding and positioning piece (10), the upper end face of the first elastic piece is propped against the dividing seat (4), and the lower end face of the first elastic piece is propped against the barrel bottom;

the second elastic piece (3) is sleeved on the guiding and positioning piece (10), the upper end face of the second elastic piece is propped against the simulator piston (7), and the lower end face of the second elastic piece is propped against the dividing seat (4);

a dividing seat (4) located between the first elastic member (11) and the second elastic member (3);

a transition elastic member (5) fixed in the groove of the tub bottom, arranged around the guide positioning member (10), and having a top surface higher than the top surface of the tub bottom;

wherein the rigidity of the second elastic piece (3) is larger than that of the first elastic piece (11).

2. The adjustable pedal simulator of claim 1, further comprising:

and the leather cup (6) is sleeved on the simulator piston (7) and is used for isolating the upper cavity of the simulator piston (7) from the lower cavity of the simulator piston (7), and the leather cup keeps sealing along with the movement of the simulator piston (7) all the time.

3. The adjustable pedal simulator of claim 1, wherein: the top surface of the transition elastic piece (5) is a cambered surface.

4. The adjustable pedal simulator of claim 1, further comprising:

a seal (8) between the end cap (9) and the valve block (2) which seals the lower chamber of the simulator piston (7) from the outside.

5. The adjustable pedal simulator of claim 1, wherein: the end cover (9) and the valve block (2) are fixed through threads or a clamping ring.

6. The adjustable pedal simulator of any one of claims 1-5, wherein: the second elastic member (3) has a stiffness at least 100 times that of the first elastic member (11).

7. The adjustable pedal simulator of any one of claims 1-5, wherein:

the first elastic member (11) and the second elastic member (3) are springs.

8. The adjustable pedal simulator of any one of claims 1-5, wherein: the transition elastic piece (5) is a rubber ring.

9. The adjustable pedal simulator of any one of claims 1-5, wherein: the transition elastic piece (5) is a plurality of rubber bulges which are round.