CN220199273U

CN220199273U - Redundant dual-output brake force sensor

Info

Publication number: CN220199273U
Application number: CN202322005877.7U
Authority: CN
Inventors: 鲍先辉; 沙曼特
Original assignee: Hefei Zhigan Technology Co ltd
Current assignee: Hefei Zhigan Technology Co ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2023-12-19
Anticipated expiration: 2033-07-28

Abstract

The utility model provides a redundant dual-output brake force sensor, which comprises a sensing unit base and four force sensing units, wherein the four force sensing units are uniformly bound on the sensing unit base in a glass sintering mode; the sensing unit base is connected with the binding PCB through binding wires; the top of the sensing unit base is fixedly connected with a shell, a spring support is fixed on the top of the shell, a plurality of signal output springs are arranged on the spring support, and the bottoms of the signal output springs are in contact with the conditioning signal PCBA. According to the utility model, by adopting four full-bridge force sensing units, and the SENT signal protocol can ensure the sectional output of two force signals, so that the dual-signal output of a single EMB force sensor is realized, and the redundant design can efficiently ensure the braking safety of an automobile.

Description

Redundant dual-output brake force sensor

Technical Field

The utility model relates to the technical field of force sensors, in particular to a redundant dual-output brake force sensor.

Background

As a new passenger car braking system, an electromechanical brake (EMB) is expected to replace the trend of a traditional hydraulic braking system (EHB) with development of automatic driving and the like in the future, and becomes a mainstream car braking system; an electromechanical brake (EMB) mainly comprises a controller, a motor, a transmission and necessary sensor systems, which are capable of generating a braking force according to the input of the driver or automatically generating a braking force according to the driving needs of the vehicle.

Existing brake force sensors are mounted between the screw rod axial thrust bearing of the brake (EMB) and the housing. And equivalent braking force acting on the friction plate is obtained by measuring the reaction force between the push rod and the shell. While brake force sensors are a key component thereof, due to safety considerations, it is often necessary to consider the design of two-way output redundancy.

Disclosure of Invention

The present utility model aims to provide a redundant dual output brake force sensor that overcomes or at least partially solves the above-mentioned problems.

In order to achieve the above purpose, the technical scheme of the utility model is specifically realized as follows:

the utility model provides a redundant dual-output brake force sensor, which comprises a brake force sensor, wherein the brake force sensor comprises a force sensing unit module, the force sensing unit module comprises a sensing unit base and four force sensing units, and the four force sensing units are uniformly bound on the sensing unit base in a glass sintering mode;

the brake force sensor further comprises a binding PCB, a conditioning signal PCBA and a flexible PCB, wherein the binding PCB is sleeved and fixed on the bottom of the support, the conditioning signal PCBA is contacted with the top of the support, the binding PCB is connected to the conditioning signal PCBA through the flexible PCB, the support is fixedly connected to the top of the sensing unit base, and four force sensing units on the sensing unit base are connected with the binding PCB through binding wires;

the top of sensing unit base still fixedly connected with shell, and be fixed with the spring bracket on the shell top, be provided with a plurality of signal output springs on the spring bracket, signal output spring bottom and the contact of conditioning signal PCBA, bind PCB, conditioning signal PCBA, flexible PCB and support and all set up in the space inside that shell and sensing unit base formed.

As a further scheme of the utility model, the bottom and the top of the bracket are respectively provided with a clamping head, the clamping heads are integrally connected with the bracket and bent upwards, clamping grooves corresponding to the clamping heads are respectively formed in the binding PCB and the conditioning signal PCBA, the clamping heads are respectively clamped in the clamping grooves in the binding PCB and the conditioning signal PCBA, and the clamping heads are in one-to-one correspondence with the clamping grooves.

As a further scheme of the utility model, the binding PCB, the conditioning signal PCBA and the bracket are clamped and positioned through the clamping head and are connected through soldering.

As a further scheme of the utility model, four U-shaped notches through which the binding lines pass are formed in the peripheries of the support and the binding PCB, and the four U-shaped notches correspond to the four force sensing units and leak out the areas of the force sensing units.

As a further scheme of the utility model, the side edge of the conditioning signal PCBA is provided with an arc notch, the bottom of the spring bracket is integrally connected with two positioning protrusions corresponding to the arc notch, and the positioning protrusions are arranged on the arc notch in a matching way.

As a further scheme of the utility model, four round holes are formed in the spring support, signal output springs are arranged on the four round holes, four contact areas corresponding to the signal output springs are arranged on the upper surface of the conditioning signal PCBA, and the bottoms of the signal output springs are in contact with the contact areas.

As a further aspect of the present utility model, the spring support and the housing are fixed by integral insert molding.

As a further aspect of the present utility model, the induction unit base is fixed to the bracket and the housing by welding, respectively.

The utility model provides a redundant dual-output brake force sensor, which has the beneficial effects that: by adopting four full-bridge force sensing units, and the SENT signal protocol can ensure the sectional output of two force signals, thereby realizing the dual-signal output of a single EMB force sensor, and the redundant design can efficiently ensure the braking safety of the automobile.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic cross-sectional structure of the present utility model.

Fig. 3 is a schematic diagram of an explosive structure according to the present utility model.

Fig. 4 is a schematic exploded view of a spring holder according to the present utility model.

Fig. 5 is a schematic structural view of a stent according to the present utility model.

Fig. 6 is a schematic structural diagram of a force sensing unit module according to the present utility model.

Fig. 7 is a schematic diagram of the operation of a single force sensing unit in accordance with the present utility model.

In the figure: 10. a brake force sensor; 101. a force sensing unit module; 111. an induction unit base; 102. a force sensing unit; 103. binding the PCB; 104. a bracket; 105. binding the wire; 106. conditioning the signal PCBA; 107. a flexible PCB; 108. a housing; 109. a spring bracket; 110. a signal output spring; 111. an induction unit base; 104-1, clamping head; 109-1, positioning projections.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Referring to fig. 1-7, a redundant dual-output brake force sensor provided by an embodiment of the present utility model includes a brake force sensor 10, the brake force sensor 10 includes a force sensing unit module 101, and the force sensing unit module 101 includes a sensing unit base 111 and four force sensing units 102, where the four force sensing units 102 are uniformly bound to the sensing unit base 111 by means of glass sintering.

The brake force sensor 10 further comprises a binding PCB103, a conditioning signal PCBA106 and a flexible PCB107, wherein the binding PCB103 is sleeved and fixed on the bottom of the support 104, the conditioning signal PCBA106 is fixedly connected to the top of the support 104, the binding PCB103 is connected to the conditioning signal PCBA106 through the flexible PCB107, the support 104 is fixedly connected to the top of the sensing unit base 111, and four force sensing units 102 on the sensing unit base 111 are connected with the binding PCB103 through binding wires 105.

The top of sensing unit base 111 still fixedly connected with shell 108, and be fixed with spring bracket 109 on the shell 108 top, be provided with a plurality of signal output springs 110 on the spring bracket 109, signal output springs 110 bottom and conditioning signal PCBA106 contact, bind PCB103, conditioning signal PCBA106, flexible PCB107 and support 104 all set up in the space inside that shell 108 and sensing unit base 111 constitute.

The spring support 109 is fixed to the housing 108 by integral insert injection molding.

The sensing unit base 111 is fixed to the bracket 104 and the housing 108, respectively, by welding.

In the using process of the utility model, force is transmitted to the force sensing unit 102 through the bottom of the sensing unit base 111, force signals are transmitted to the binding PCB103 through the binding line 105, the binding PCB103 is connected to the conditioning signal PCBA106 through the flexible PCB107, and then the force signals are output through the signal output spring 110.

As shown in fig. 3 and 5, the bottom and the top of the bracket 104 are respectively provided with a chuck 104-1, the chucks 104-1 are integrally connected with the bracket 104 and bent upwards, clamping grooves corresponding to the chucks 104-1 are respectively formed in the binding PCB103 and the conditioning signal PCBA106, the chucks 104-1 are respectively clamped in the clamping grooves on the binding PCB103 and the conditioning signal PCBA106, the chucks 104-1 are in one-to-one correspondence with the clamping grooves, the binding PCB103, the conditioning signal PCBA106 and the bracket 104 are clamped and positioned through the chucks 104-1, and are connected through soldering, the chucks 104-1 extend into the clamping grooves, so that the binding PCB103 and the conditioning signal PCBA106 can be conveniently and rapidly aligned and arranged on the bracket 104, and then the binding PCB103 and the conditioning signal PCBA106 can be fixed with the bracket 104 through soldering on the chucks 104-1.

As shown in fig. 3, 5 and 6, four U-shaped notches through which the binding line 105 passes are formed in the peripheries of the bracket 104 and the binding PCB103, the four U-shaped notches correspond to the four force sensing units 102, the area of the force sensing units 102 is leaked, the four force sensing units 102 are conveniently leaked through the design of the U-shaped notches, the binding line 105 is conveniently passed, and the force sensing units 102 are connected with the binding PCB103 through two ends of the binding line 105.

As shown in fig. 3 and fig. 4, the side edge of the conditioning signal PCBA106 is provided with an arc notch, the bottom of the spring bracket 109 is integrally connected with two positioning protrusions 109-1 corresponding to the arc notch, the positioning protrusions 109-1 are matched and arranged on the arc notch, four round holes are formed in the spring bracket 109, the four round holes are provided with the signal output springs 110, the upper surface of the conditioning signal PCBA106 is provided with four contact areas corresponding to the signal output springs 110, the bottom of the signal output springs 110 is contacted with the contact areas, and the positioning protrusions are arranged on the arc notch, so that the four round holes in the spring bracket 109 can be aligned with the four contact areas on the conditioning signal PCBA106, thereby facilitating the alignment and contact of the signal output springs 110 through the round holes, and ensuring the stability of the signal output springs 110 when outputting signals.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. The redundant dual-output brake force sensor comprises a brake force sensor (10), and is characterized in that the brake force sensor (10) comprises a force sensing unit module (101), the force sensing unit module (101) comprises a sensing unit base (111) and four force sensing units (102), and the four force sensing units (102) are uniformly bound on the sensing unit base (111) in a glass sintering mode;

the brake force sensor (10) further comprises a binding PCB (103), a conditioning signal PCBA (106) and a flexible PCB (107), wherein the binding PCB (103) is sleeved and fixed on the bottom of the support (104), the conditioning signal PCBA (106) is fixedly connected to the top of the support (104), the binding PCB (103) is connected to the conditioning signal PCBA (106) through the flexible PCB (107), the support (104) is fixedly connected to the top of the sensing unit base (111), and four force sensing units (102) on the sensing unit base (111) are connected with the binding PCB (103) through binding wires (105);

the top of induction unit base (111) still fixedly connected with shell (108), and be fixed with spring bracket (109) on shell (108) top, be provided with a plurality of signal output spring (110) on spring bracket (109), signal output spring (110) bottom and conditioning signal PCBA (106) contact, bind PCB (103), conditioning signal PCBA (106), flexible PCB (107) and support (104) all set up inside the space that shell (108) and induction unit base (111) constitute.

2. The redundant dual output brake force sensor of claim 1, wherein a chuck (104-1) is arranged at the bottom and the top of the bracket (104), the chuck (104-1) is integrally connected with the bracket (104) and bent upwards, clamping grooves corresponding to the chuck (104-1) are formed in the binding PCB (103) and the conditioning signal PCBA (106), the chucks (104-1) are respectively clamped in the clamping grooves in the binding PCB (103) and the conditioning signal PCBA (106), and the chucks (104-1) are in one-to-one correspondence with the clamping grooves.

3. A redundant dual output brake force sensor according to claim 2, wherein the binding PCB (103), conditioning signal PCBA (106) and bracket (104) are clamped and positioned by a clamp head (104-1) and are soldered.

4. The redundant dual output brake force sensor of claim 2, wherein four U-shaped notches through which the binding wires (105) pass are formed in the outer circumferences of the bracket (104) and the binding PCB (103), and the four U-shaped notches correspond to the four force sensing units (102) and leak out the area of the force sensing units (102).

5. The redundant dual output brake force sensor of claim 2, wherein the conditioning signal PCBA (106) is provided with an arc notch on a side edge, two positioning protrusions (109-1) corresponding to the arc notch are integrally connected to the bottom of the spring bracket (109), and the positioning protrusions (109-1) are arranged on the arc notch in a matching manner.

6. The redundant dual output brake force sensor of claim 5, wherein four circular holes are formed in the spring support (109), signal output springs (110) are arranged on the four circular holes, four contact areas corresponding to the signal output springs (110) are arranged on the upper surface of the conditioning signal PCBA (106), and the bottoms of the signal output springs (110) are in contact with the contact areas.

7. A redundant dual output brake force sensor according to claim 6, wherein the spring support (109) is secured to the housing (108) by integral insert injection molding.

8. A redundant dual output brake force sensor according to claim 1, wherein the sensing unit base (111) is secured to the bracket (104) and the housing (108), respectively, by welding.