Brake pedal position sensor

Abstract

The utility model discloses a brake pedal position sensor, which belongs to the technical field of automobiles and comprises a brake push rod fixedly connected on a brake pedal arm, two first mounting grooves are symmetrically arranged at the bottom of the brake push rod, magnets are fixedly connected in the first mounting grooves, and the like polarities of the two magnets are oppositely arranged, namely N pole to N pole or S pole to S pole; the supporting shell is fixedly connected in the automobile and vertically located below the brake push rod, a printed circuit board is arranged in the supporting shell, a first positioning mechanism is assembled between the printed circuit board and the supporting shell, and a Hall chip is fixedly connected to the position, corresponding to the magnet, of the upper portion of the printed circuit board; two pre-coating molds are symmetrically arranged above and below the side, far away from the Hall chip, of the printed circuit board; compared with the prior art, the magnet and the sensor are of a separated structure, compared with the prior art, non-contact matching can avoid the problem that the precision is reduced due to aging caused by frequent friction of a gear engaging system, and high precision is kept.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and in particular relates to a brake pedal position sensor. Background Art

[0002] The intelligent brake safety system, also known as the automatic brake assist system, is a safety driving assistance system based on advanced sensor technology and electronic control system. It monitors road conditions in real time by sensing the vehicle's surrounding environment and the driver's behavior, and automatically brakes in dangerous situations to prevent collisions or reduce the severity of collisions.

[0003] The brake pedal position sensor is one of the important structures of the intelligent brake safety system. It senses the displacement of the brake pedal and converts it into an electrical signal to provide the intelligent brake safety system with accurate information about the brake pedal position and travel, so that the intelligent brake safety system can brake in time.

[0004] The magnet and sensor of the current brake pedal position sensor are integrated into one. As the use time increases, the accuracy will age and decrease due to the frequent friction of the gear shifting system. At the same time, the current brake pedal position sensors are connected to the circuit system using connectors, which take up a lot of space and cannot meet the current requirements for increasingly higher integration.

[0005] In view of this, a brake pedal position sensor is designed to solve the above problems. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a brake pedal position sensor that can avoid the problem of accuracy degradation caused by frequent friction of the gear shifting system, maintain high accuracy, and at the same time reduce the occupied space and meet the requirements of high integration.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a brake pedal position sensor, comprising:

[0008] A brake push rod is fixedly connected to the brake pedal arm, and two first mounting grooves are symmetrically defined at the bottom of the brake push rod. Magnets are fixedly connected inside the first mounting grooves, and the two magnets are placed opposite to each other with the same polarity, i.e., N pole to N pole or S pole to S pole;

[0009] A support shell is fixedly connected to the car and is located vertically below the brake push rod. A printed circuit board is arranged inside the support shell. A first positioning mechanism is assembled between the printed circuit board and the support shell. A Hall chip is fixed to the position corresponding to the magnet above the printed circuit board. Two pre-molds are symmetrically arranged on the upper and lower sides of the printed circuit board away from the Hall chip. A second positioning mechanism is assembled between the pre-mold and the printed circuit board. The lower pre-mold is located in the support shell. Two second mounting grooves are symmetrically opened inside the pre-mold. Pins connected to the circuit system are fixed inside the second mounting grooves. The pins are connected to the printed circuit board near one end of the printed circuit board. A support cover is arranged above the pre-mold. A third positioning mechanism is assembled between the support cover and the support shell, and a fixing mechanism is assembled between the support cover and the support shell.

[0010] Furthermore, the first positioning mechanism includes two first positioning members fixed to the bottom end of the inner part of the support shell and two first positioning holes opened inside the printed circuit board. The first positioning member is composed of a positioning base, a positioning column and a positioning top seat. The positioning base is fixed to the bottom end of the inner part of the support shell, the bottom end of the positioning column is fixed to the positioning base, and the bottom end of the positioning top seat is fixed to the top end of the positioning column. The two first positioning member positioning bases are located below the printed circuit board, the two first positioning member positioning columns respectively pass through the two first positioning holes and extend to above the printed circuit board, and the two first positioning member positioning top seats are located above the printed circuit board.

[0011] Furthermore, the second positioning mechanism includes four second positioning members symmetrically fixed to the top of the lower pre-cover mold and the bottom of the upper pre-cover mold, and two second positioning holes symmetrically opened inside the printed circuit board away from the Hall chip side, and the four second positioning members are correspondingly inserted into the two second positioning holes.

[0012] Furthermore, the third positioning mechanism includes a third positioning hole opened inside the support cover plate, the height of the first positioning member close to the third positioning hole side is higher than the height of the first positioning member away from the third positioning hole side, the positioning column of the first positioning member close to the third positioning hole side extends through the third positioning hole to above the support cover plate, and the positioning top seat of the first positioning member close to the third positioning hole side is located above the support cover plate.

[0013] Furthermore, the fixing mechanism includes four connecting members, which are fixed between the support cover and the support shell.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The magnet and sensor of the utility model are set as a separate structure. Compared with the existing technology, the non-contact cooperation can avoid the problem of accuracy reduction due to aging caused by frequent friction of the gear shifting system, and maintain high accuracy.

[0016] 2. The present invention realizes circuit conduction by welding pins and circuit system through holes. Compared with the prior art, it can reduce the occupied space, meet the requirements of high integration, and reduce procurement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the local structure of the utility model from another perspective;

[0019] Figure 3 This is a schematic diagram of the partial structure of the utility model;

[0020] Figure: 1, brake push rod; 2, support housing; 3, first mounting slot; 4, magnet; 5, pre-molded; 6, second mounting slot; 7, pins; 8, printed circuit board; 9, support cover; 10, Hall chip;

[0021] 101. First positioning member; 102. First positioning hole;

[0022] 201. Second positioning member; 202. Second positioning hole;

[0023] 301, third positioning hole;

[0024] 401. Connectors. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-3 The present invention provides the following technical solutions: a brake pedal position sensor, comprising:

[0027] A brake push rod 1 is fixed to the brake pedal arm. Two first mounting grooves 3 are symmetrically formed at the bottom of the brake push rod 1. Magnets 4 are fixed inside the first mounting grooves 3. The two magnets 4 are placed opposite each other with the same polarity, i.e., N pole to N pole or S pole to S pole.

[0028] The magnet 4 is a neodymium iron boron magnet. Two neodymium iron boron magnets are separated into N poles and S poles, and are placed opposite to each other with the same polarity in a mold, and injection molding is performed to obtain a brake push rod 1 with two magnets 4 embedded therein.

[0029] A support housing 2 is fixedly connected to the vehicle and is located vertically below the brake push rod 1. A printed circuit board 8 is provided inside the support housing 2. A first positioning mechanism is assembled between the printed circuit board 8 and the support housing 2. A Hall chip 10 is fixedly connected to the position of the magnet 4 above the printed circuit board 8. Two pre-cover molds 5 are symmetrically arranged above and below the printed circuit board 8 on the side away from the Hall chip 10. A second positioning mechanism is assembled between the pre-cover mold 5 and the printed circuit board 8. The lower pre-cover mold 5 is located in the support housing 2. Two second mounting grooves 6 are symmetrically provided inside the pre-cover mold 5. Pins 7 connected to the circuit system are fixed inside the second mounting groove 6. The pins 7 are connected to the printed circuit board 8 at one end close to the printed circuit board 8. A support cover plate 9 is provided above the upper pre-cover mold 5. A third positioning mechanism is assembled between the support cover plate 9 and the support housing 2. A fixing mechanism is assembled between the support cover plate 9 and the support housing 2.

[0030] The Hall chip 10 is mounted on the printed circuit board 8 through the SMT process;

[0031] Put the two pins 7 into the overmolding mold and perform injection molding to obtain a pre-overmolding mold 5 with two pins 7 therein;

[0032] The pins 7 are fixed to the printed circuit board 8 by a soldering process and fixed to the circuit board of the circuit system by through-hole welding.

[0033] In this embodiment, the brake pedal is moved when it is stepped on, and the brake pedal drives the brake pedal arm to move in the same direction, and the brake pedal arm drives the brake push rod 1 to move in the same direction, and the brake push rod 1 drives the two magnets 4 to move in the same direction. During the movement of the two magnets 4 in the same direction, the output voltage of the Hall chip 10 changes and is transmitted to the circuit system through pin 7. The control system calculates its displacement in the magnetic field by measuring the output voltage of the Hall chip 10 transmitted by the circuit system, thereby controlling the intelligent brake.

[0034] Specifically, the first positioning mechanism includes two first positioning members 101 fixed to the bottom end of the inner part of the support shell 2 and two first positioning holes 102 opened inside the printed circuit board 8. The first positioning member 101 is composed of a positioning base, a positioning column and a positioning top seat. The positioning base is fixed to the bottom end of the inner part of the support shell 2, the bottom end of the positioning column is fixed to the positioning base, and the bottom end of the positioning top seat is fixed to the top end of the positioning column. The two first positioning members 101 positioning bases are located below the printed circuit board 8, the two first positioning members 101 positioning columns respectively pass through the two first positioning holes 102 and extend to above the printed circuit board 8, and the two first positioning members 101 positioning top seats are located above the printed circuit board 8.

[0035] In this embodiment, the first positioning mechanism realizes the positioning of the support housing 2 and the printed circuit board 8 by inserting two first positioning members 101 into the two first positioning holes 102 respectively, which facilitates the subsequent assembly of structures including the support cover 9.

[0036] Specifically, the second positioning mechanism includes four second positioning members 201 symmetrically fixed to the top of the lower pre-cover mold 5 and the bottom of the upper pre-cover mold 5, and two second positioning holes 202 symmetrically opened inside the printed circuit board 8 on the side away from the Hall chip 10. The four second positioning members 201 are correspondingly inserted into the two second positioning holes 202.

[0037] In this embodiment, the second positioning mechanism realizes the positioning of the two pre-moldings 5 ​​and the printed circuit board 8 by inserting the two second positioning members 201 into the two second positioning holes 202 respectively, which facilitates the subsequent assembly of structures including the pins 7.

[0038] Specifically, the third positioning mechanism includes a third positioning hole 301 opened inside the support cover 9, the height of the first positioning member 101 close to the third positioning hole 301 is higher than the height of the first positioning member 101 away from the third positioning hole 301, the positioning column of the first positioning member 101 close to the third positioning hole 301 extends through the third positioning hole 301 to above the support cover 9, and the positioning top seat of the first positioning member 101 close to the third positioning hole 301 is located above the support cover 9.

[0039] In this embodiment, the third positioning mechanism realizes the positioning of the support cover 9 and the support shell 2 by inserting the first positioning member 101 close to the third positioning hole 301 into the third positioning hole 301, which facilitates the subsequent assembly of the support cover 9 and other structures.

[0040] Specifically, the fixing mechanism includes four connecting members 401 , and the four connecting members 401 are fixedly connected between the supporting cover plate 9 and the supporting shell 2 .

[0041] The connecting piece 401 fixes the support cover 9 and the support shell 2 by a hot riveting process.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake pedal position sensor, characterized in that: include: A brake push rod (1) is fixedly connected to a brake pedal arm, wherein two first mounting grooves (3) are symmetrically provided at the bottom of the brake push rod (1), magnets (4) are fixedly connected inside the first mounting grooves (3), and the two magnets (4) are placed opposite to each other with the same polarity, i.e., N pole to N pole or S pole to S pole; A support shell (2) is fixedly connected to a vehicle and is located vertically below a brake push rod (1). A printed circuit board (8) is provided inside the support shell (2). A first positioning mechanism is assembled between the printed circuit board (8) and the support shell (2). A Hall chip (10) is fixedly connected to a position corresponding to a magnet (4) above the printed circuit board (8). Two pre-covering molds (5) are symmetrically arranged above and below the side of the printed circuit board (8) away from the Hall chip (10). A second positioning mechanism is assembled between the pre-covering mold (5) and the printed circuit board (8). The lower pre-covering mold (5) is located in the supporting shell (2), and two second mounting grooves (6) are symmetrically provided inside the pre-covering mold (5). A pin (7) connected to the circuit system is fixed inside the second mounting groove (6), and the pin (7) is connected to the printed circuit board (8) at one end close to the printed circuit board (8). A supporting cover plate (9) is provided above the upper pre-covering mold (5), and a third positioning mechanism is installed between the supporting cover plate (9) and the supporting shell (2), and a fixing mechanism is installed between the supporting cover plate (9) and the supporting shell (2).

2. The brake pedal position sensor according to claim 1, characterized in that: The first positioning mechanism comprises two first positioning members (101) fixed to the bottom end of the interior of the support shell (2) and two first positioning holes (102) opened in the interior of the printed circuit board (8); the first positioning member (101) is composed of a positioning base, a positioning column and a positioning top seat; the positioning base is fixed to the bottom end of the interior of the support shell (2); the bottom end of the positioning column is fixed to the positioning base; the bottom end of the positioning top seat is fixed to the top end of the positioning column; the positioning bases of the two first positioning members (101) are located below the printed circuit board (8); the positioning columns of the two first positioning members (101) respectively pass through the two first positioning holes (102) and extend to above the printed circuit board (8); and the positioning top seats of the two first positioning members (101) are located above the printed circuit board (8).

3. The brake pedal position sensor according to claim 1, characterized in that: The second positioning mechanism comprises four second positioning members (201) symmetrically fixed to the top end of the lower pre-covering mold (5) and the bottom end of the upper pre-covering mold (5), and two second positioning holes (202) symmetrically opened inside the side of the printed circuit board (8) away from the Hall chip (10), and the four second positioning members (201) are correspondingly inserted into the two second positioning holes (202).

4. The brake pedal position sensor according to claim 2, characterized in that: The third positioning mechanism includes a third positioning hole (301) provided inside the support cover plate (9), the height of the first positioning member (101) close to the third positioning hole (301) is higher than the height of the first positioning member (101) away from the third positioning hole (301), the positioning column of the first positioning member (101) close to the third positioning hole (301) extends through the third positioning hole (301) to above the support cover plate (9), and the positioning top seat of the first positioning member (101) close to the third positioning hole (301) is located above the support cover plate (9).

5. The brake pedal position sensor according to claim 1, characterized in that: The fixing mechanism comprises four connecting members (401), and the four connecting members (401) are fixedly connected between the supporting cover plate (9) and the supporting shell (2).

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