CN210154809U

CN210154809U - Pedal simulator

Info

Publication number: CN210154809U
Application number: CN201921354692.4U
Authority: CN
Inventors: 于鑫; 刘海珍; 陶喆; 周浩; 王攀; 林立新
Original assignee: Shanghai Nasen Automobile Electronics Co Ltd
Current assignee: Shanghai Nasen Automobile Electronics Co Ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-03-17
Anticipated expiration: 2029-08-20

Abstract

The utility model relates to the technical field of automobile brake systems, in particular to a pedal simulator, which comprises an adjusting fork, a connecting rod, a push rod, a bush, an elastomer, a shell and a pressure spring, wherein the adjusting fork is used for being connected with a brake pedal, and the connecting rod is fixedly connected with the adjusting fork and is in spherical hinge with the push rod; the outer peripheral surface of the push rod is a conical surface, the conical diameter of the push rod is gradually reduced along the advancing direction of the push rod, the bushing has elasticity, the bushing is sleeved on the push rod and is configured to be fixed on the shell, the elastic body is configured to press the bushing on the push rod, the pressure spring is sleeved on the push rod, and the pressure spring abuts against the shell and is configured to abut against the adjusting fork. The pedal simulator is simple in structure and low in cost, when a brake pedal is stepped on, the inner diameter of the bushing is gradually expanded by the push rod, the elastic body is also compressed, and the radial holding force and the friction force borne by the push rod are gradually increased; accordingly, when the push rod retreats, the friction force applied to the push rod is gradually reduced, so that the driver can fully experience the damping feeling.

Description

Pedal simulator

Technical Field

The utility model relates to an automobile brake system technical field especially relates to a footboard simulator.

Background

At present, a pedal simulator used in a test process of an electric power-assisted brake system usually adopts spring simulation, after a driver steps on a pedal, a push rod is input to push a spiral spring or a spiral spring group to simulate the pedal feeling of a vacuum booster, and other elastic elements are optionally added to serve as buffering. Although the spring simulation scheme is simple in structure and low in manufacturing cost, the pedal is lack of damping feeling, and a driver feels fatigue when driving for a long time.

Aiming at the problem of lack of damping sense when a spring is adopted for simulation, a solution scheme of hydraulic load simulation is provided in the prior art. After the driver steps on the pedal, the input push rod pushes the master cylinder piston, and the electromagnetic valve controls the flow direction of hydraulic pressure according to system measurement. When the boosting working condition is normal, the piston can push the simulation load element to simulate the pedal feeling; when the boosting force is not provided, the pressure generated by the piston is transmitted to the wheel cylinder, and the real pedal feeling is fed back. The scheme can basically achieve the same pedal feeling of the vacuum booster, but the design of the whole system becomes complicated due to the hydraulic pipeline introduced by the scheme, and the added parts not only greatly increase the cost, but also additionally introduce more failure points.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: provided is a pedal simulator which has a damping feeling when a driver steps on a pedal, and which has a simple structure and a low cost.

The utility model provides a pedal simulator, this pedal simulator includes: the brake pedal adjusting device comprises an adjusting fork, a connecting rod, a push rod, a bushing, an elastic body, a shell and a pressure spring, wherein the adjusting fork is used for being connected with a brake pedal, one end of the connecting rod is fixedly connected with the adjusting fork, and the other end of the connecting rod is in spherical hinge with the push rod; the outer peripheral surface of the push rod is a conical surface, the outer diameter of the conical surface is gradually reduced along the direction far away from the connecting rod, the bushing is made of elastic materials, and the bushing is sleeved on the push rod and configured to be fixed on the shell; the elastic body is configured to press the bushing against the push rod; the push rod is sleeved with the pressure spring, one end of the pressure spring abuts against the shell, and the other end of the pressure spring is configured to abut against the adjusting fork.

As a preferable scheme of the pedal simulator, the pedal simulator further comprises a housing, the housing is connected with the casing, the housing is sleeved on the bushing, a containing cavity is formed in the housing, and the elastic body is located in the containing cavity.

As a preferable scheme of the pedal simulator, two accommodating cavities are arranged in the housing, the two accommodating cavities are arranged at intervals along the axial direction of the bushing, and the two elastic bodies are respectively arranged in the two accommodating cavities.

As a preferable scheme of the pedal simulator, along the radial direction of the bushing, one end of the elastic body is provided with an arc surface and is abutted against the outer peripheral surface of the bushing, and the other end of the elastic body is provided with a protrusion and is abutted against the inner wall of the accommodating cavity.

As the optimal scheme of the pedal simulator, a stepped hole is formed in the shell, the push rod penetrates through the stepped hole, the stepped hole comprises a first hole with a large inner diameter and a second hole with a small inner diameter, and the shell is arranged in the first hole in an interference mode.

As a preferred scheme of the pedal simulator, a boss is arranged at one end of the shell, the first hole is formed in the boss, and the boss is sleeved with the pressure spring.

As a preferable mode of the pedal simulator, the elastic body is annular, and the accommodating chamber is annular.

As a preferable scheme of the pedal simulator, the pedal simulator further comprises a baffle fixedly arranged on the connecting rod, and two ends of the pressure spring are respectively abutted against the baffle and the shell.

As the preferred scheme of the pedal simulator, two groups of grooves are arranged on the lining, two groups of grooves are respectively positioned at two ends of the axial direction of the lining, and each group of grooves comprises a plurality of openings which are arranged at intervals along the circumferential direction of the lining.

As a preferable aspect of the pedal simulator, the plurality of openings of each group of grooves are uniformly distributed in the bushing in a circumferential direction of the bushing.

The utility model has the advantages that:

the utility model provides a pedal simulator, which comprises an adjusting fork, a connecting rod, a push rod, a bush, an elastomer, a shell and a pressure spring, wherein the adjusting fork is used for being connected with a brake pedal, one end of the connecting rod is fixedly connected with the adjusting fork, and the other end of the connecting rod is in spherical hinge with the push rod; the outer peripheral face of the push rod is a conical face, the outer diameter of the conical face is gradually reduced along the direction away from the connecting rod, the bushing is made of elastic materials, the bushing is sleeved on the push rod and is configured to be fixed on the shell, the elastic body is configured to compress the bushing on the push rod, the push rod is sleeved with the pressure spring, one end of the pressure spring abuts against the shell, and the other end of the pressure spring abuts against the adjusting fork. This footboard simulator's simple structure, the cost is lower, when trampling brake pedal, the internal diameter of bush is propped greatly by the push rod gradually, and the elastomer is also compressed gradually simultaneously, and the radial power of hugging closely that the push rod received will crescent to can realize advancing along with the push rod, the damping force crescent that the push rod received, correspondingly, along with retreating of push rod, the damping force that the push rod received also reduces gradually, and the driver can fully experience the damping and feel.

Drawings

Fig. 1 is a schematic structural diagram of a pedal simulator in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the housing, the bushing, and the elastic body according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a bushing according to an embodiment of the present invention.

In the figure:

1. adjusting the fork; 2. a connecting rod; 3. a push rod; 31. a conical surface; 4. a bushing; 41. an opening; 42. a through hole; 5. an elastomer; 51. a protrusion; 6. a housing; 61. a stepped hole; 62. a boss; 7. a pressure spring; 8. a housing; 9. and a baffle plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means 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 invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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 invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 3, the present embodiment provides a pedal simulator, which includes an adjustment fork 1, a connection rod 2, a push rod 3, a bushing 4, an elastic body 5, a housing 6, and a pressure spring 7, where the adjustment fork 1 is used for connecting with a brake pedal, one end of the connection rod 2 is fixedly connected with the adjustment fork 1, and the other end of the connection rod 2 is spherically hinged with the push rod 3; the outer peripheral surface of the push rod 3 is a conical surface 31, and along the direction away from the connecting rod 2, the outer diameter of the conical surface 31 gradually decreases, the bush 4 is made of an elastic material, the bush 4 is sleeved on the push rod 3 and is configured to be fixed on the housing 6, it should be noted that, during testing, the position of the housing 6 is fixed, so that the push rod 3 can be supported through the bush 4, the elastic body 5 is configured to compress the bush 4 on the push rod 3, the pressure spring 7 is sleeved on the push rod 3, one end of the pressure spring 7 abuts against the housing 6, and the other end of the pressure spring 7 abuts against the adjusting fork 1.

When trampling brake pedal, brake pedal promotes adjustment fork 1 and removes, adjustment fork 1 drives push rod 3 through connecting rod 2 and follows the axial motion of push rod 3, the in-process that push rod 3 removed, the internal diameter of bush 4 is propped greatly gradually, elastomer 5 is also compressed gradually simultaneously, the radial power of hugging closely that push rod 3 received will crescent, frictional resistance will also increase, thereby can realize along with the gos forward of push rod 3, the damping force that push rod 3 received increases gradually, correspondingly, along with retreating of push rod 3, the damping force that push rod 3 received will reduce gradually, the driver can fully experience the damping and feel, pressure spring 7 then plays the effect of analog load in the footboard simulator, and this footboard simulator adopts pure mechanical structure completely, moreover, the steam generator is simple in structure, the cost is lower.

In this embodiment, the bushing 4 is provided with the through hole 42, the push rod 3 is inserted into the through hole 42, and when the brake pedal is not stepped on, the bushing 4 is in interference fit with the push rod 3, at this time, the push rod 3 receives an initial radial pretightening force, the radial pretightening force can be used as a positive pressure on the surface of the push rod 3 and can provide a friction force which can be calculated, and when the brake pedal is stepped on, the friction force provided by the bushing 4 to the push rod 3 is gradually increased, so that a good damping effect is achieved.

The lining 4 can be made of elastic wear-resistant materials, such as polyetheretherketone, polyoxymethylene + polytetrafluoroethylene, steel-backed composite materials and the like. The elastic body 5 may be made of rubber or the like.

As shown in fig. 3, two sets of slots are provided at intervals on the bush 4 in the axial direction of the bush 4, each set of slots including four or more openings 41 provided at intervals in the circumferential direction of the bush 4. Each opening 41 extends in the axial direction of the bush 4. Preferably, the openings 41 of the respective groups of slots are uniformly distributed in the circumferential direction of the bush 4. It is understood that the number and arrangement of the openings 41 are not limited in this embodiment. It is further preferred that each opening 41 in one set of slots is through a first end of the bushing 4 in the axial direction and each opening 41 in the other set of slots is through a second end of the bushing 4 in the axial direction, so that the middle portion of the bushing 4 is a cylindrical surface that ensures an interference fit of the bushing 4 with the push rod 3 during movement of the push rod 3.

Optionally, the pedal simulator further includes a housing 8, the housing 8 is connected to the casing 6, the bushing 4 is sleeved with the housing 8, a containing cavity is formed in the housing 8, and the elastic body 5 is located in the containing cavity. In this embodiment, the opening 41 penetrates the side wall of the bush 4. Preferably, along the radial direction of bush 4, the one end of elastomer 5 is equipped with the cambered surface and with bush 4 butt, the other end of elastomer 5 is equipped with arch 51 and with the inner wall butt of holding the chamber. The elastic body 5 can be prevented from coming off by the housing 8. Preferably, the bushing 4 and the housing cavity are both annular. In other embodiments, an annular groove may be provided on the outer circumferential surface of the bushing 4, in which the elastic body 5 is disposed.

Preferably, the shell 6 is provided with a stepped hole 61, the push rod 3 penetrates through the stepped hole 61, the stepped hole 61 comprises a first hole with a larger inner diameter and a second hole with a smaller inner diameter, and the shell 8 is arranged in the first hole in an interference manner. In other embodiments, the housing 8 may be integral with the housing 6.

In this embodiment, one end of the housing 6 is provided with a boss 62, the first hole is formed in the boss 62, and the boss 62 is sleeved with the pressure spring 7. The boss 62 can ensure that the compression spring 7 is not easy to excessively skew during compression. Preferably, the pedal simulator further comprises a baffle 9 fixedly arranged on the connecting rod 2, and two ends of the pressure spring 7 are respectively abutted against the baffle 9 and the shell 6.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor 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 pedal simulator, comprising: the brake pedal adjusting device comprises an adjusting fork (1), a connecting rod (2), a push rod (3), a lining (4), an elastic body (5), a shell (6) and a pressure spring (7), wherein the adjusting fork (1) is used for being connected with a brake pedal, one end of the connecting rod (2) is fixedly connected with the adjusting fork (1), and the other end of the connecting rod (2) is in spherical hinge with the push rod (3); the outer peripheral surface of the push rod (3) is a conical surface (31), the outer diameter of the conical surface (31) is gradually reduced along the direction far away from the connecting rod (2), the bushing (4) is made of an elastic material, and the bushing (4) is sleeved on the push rod (3) and configured to be fixed on the shell (6); the elastic body (5) is configured to press the bushing (4) against the push rod (3); the push rod (3) is sleeved with the pressure spring (7), one end of the pressure spring (7) abuts against the shell (6), and the other end of the pressure spring (7) is configured to abut against the adjusting fork (1).

2. The pedal simulator according to claim 1, further comprising a housing (8), wherein the housing (8) is connected to the housing (6), the housing (8) is sleeved on the bushing (4), a containing cavity is formed in the housing (8), and the elastic body (5) is located in the containing cavity.

3. The pedal simulator according to claim 2, wherein two receiving cavities are provided in the housing (8), the two receiving cavities being spaced apart in the axial direction of the bushing (4), and the two elastic bodies (5) being respectively provided in the two receiving cavities.

4. The pedal simulator according to claim 3, wherein, in the radial direction of the bushing (4), one end of the elastic body (5) is provided with an arc surface and abuts against the outer circumferential surface of the bushing (4), and the other end of the elastic body (5) is provided with a protrusion (51) and abuts against the inner wall of the accommodating cavity.

5. The pedal simulator according to claim 2, wherein a stepped hole (61) is formed in the housing (6), the push rod (3) is arranged in the stepped hole (61) in a penetrating manner, the stepped hole (61) comprises a first hole with a larger inner diameter and a second hole with a smaller inner diameter, and the housing (8) is arranged in the first hole in an interference manner.

6. The pedal simulator according to claim 5, wherein a boss (62) is provided at one end of the housing (6), the first hole is provided on the boss (62), and the pressure spring (7) is sleeved on the boss (62).

7. The pedal simulator according to claim 2, wherein the elastomer body (5) is annular and the housing cavity is annular.

8. The pedal simulator according to any one of claims 1 to 6, further comprising a baffle (9) fixedly arranged on the connecting rod (2), wherein both ends of the compression spring (7) are respectively abutted against the baffle (9) and the housing (6).

9. The pedal simulator according to any one of claims 1 to 6, wherein the bushing (4) is provided with two sets of grooves respectively located at both ends of the bushing (4) in the axial direction, each set of grooves including a plurality of openings (41) spaced apart in the circumferential direction of the bushing (4).

10. The pedal simulator according to claim 9, wherein the plurality of openings (41) of each set of grooves are evenly distributed in the bushing (4) along the circumference of the bushing (4).