CN220430123U

CN220430123U - Linear control pedal structure

Info

Publication number: CN220430123U
Application number: CN202322139481.1U
Authority: CN
Inventors: 陈静; 吴春明; 江辉龙; 黄廷杰; 李博
Original assignee: Bogo Rubber Plastic Wuxi Co ltd
Current assignee: Bogo Rubber Plastic Wuxi Co ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2024-02-02
Anticipated expiration: 2033-08-09

Abstract

A brake pedal structure comprises a base; the pedal arm is rotatably arranged in the base, and a second arc-shaped bulge is arranged at the bottom of the pedal arm; the force simulator base is arranged in the base, and a second arc-shaped groove is formed in the force simulator base; the force simulator is arranged between the pedal arm and the force simulator base, a first arc-shaped groove corresponding to the second arc-shaped protrusion is arranged on the force simulator, and a first arc-shaped protrusion corresponding to the second arc-shaped groove is arranged on the force simulator; wherein, the second arc protruding is mutually supported with first arc recess, and the second arc recess is mutually supported with first arc protruding and is used for fixing force simulator. According to the utility model, the force simulator is fixed in the pedal by the mutual matching of the two pairs of arc-shaped bulges and the arc-shaped grooves, so that the condition that the force simulator moves up and down or shakes left and right is prevented, and the force stagnation is generated by friction between the friction element and the upper shell, so that the driving comfort of a driver is facilitated to be improved.

Description

Linear control pedal structure

Technical Field

The utility model relates to the technical field of automobile pedals, in particular to a linear control pedal structure.

Background

The brake pedal is just as name means a pedal limiting power, namely a pedal of a foot brake, and is used for decelerating and stopping. It is one of the five major steering members for automobile driving. The frequency of use is very high. The driver controls how to directly influence the driving safety of the automobile. With the increasing popularization of the electronic degree of the whole vehicle system, the automatic auxiliary driving technology is also changed day by day, and in order to better support the automatic driving technology in the future, the traditional hydraulic brake pedal technology is replaced by a brake pedal controlled by a wire.

The existing hydraulic braking device is high in comprehensive cost, complex in structure, large in size, large in occupied arrangement space, and large in weight of the whole vehicle, energy consumption of the whole vehicle can be influenced, pedal comfort of a driver can be gradually deteriorated along with reduction of hydraulic oil, and in addition, inspection is possibly not in place when the driver steps on the pedal, so that potential safety hazards are caused.

To this end, we propose a linear control pedal structure.

Disclosure of Invention

The applicant provides a linear control pedal structure aiming at the defects in the prior art, so that the force simulator is fixed in a pedal through the mutual matching of two pairs of arc-shaped bulges and arc-shaped grooves, the condition that the force simulator moves up and down or shakes left and right is prevented, meanwhile, the phenomenon that the force simulator has clamping stagnation when a pedal arm moves is avoided, the foot feeling is influenced, even the function is influenced, the force simulator provides comfortable foot feeling of stepping force output of the linear control pedal, and the force stagnation is generated through friction between a friction element and an upper shell, so that the driving comfort of a driver is conveniently improved.

The technical scheme adopted by the utility model is as follows:

a linear control brake pedal structure comprising:

a base;

the pedal arm is rotatably arranged in the base, and a second arc-shaped bulge is arranged at the bottom of the pedal arm;

the force simulator base is arranged in the base, and a second arc-shaped groove is formed in the force simulator base;

the force simulator is arranged between the pedal arm and the force simulator base, a first arc-shaped groove corresponding to the second arc-shaped protrusion is arranged on the force simulator, and a first arc-shaped protrusion corresponding to the second arc-shaped groove is arranged on the force simulator;

wherein, the second arc protruding is mutually supported with first arc recess, and the second arc recess is mutually supported with first arc protruding and is used for fixing force simulator.

It is further characterized by:

be provided with first cavity in the base, the footboard arm rotates through the rotation axis and sets up in first cavity, and the force simulator base sets up in first cavity, is provided with the second cavity in the force simulator base, and the second arc recess sets up in the second cavity.

The force simulator comprises a lower shell and an upper shell movably arranged in the lower shell, wherein a first arc-shaped groove is formed in the top of the upper shell, and a first arc-shaped protrusion is formed in the bottom of the lower shell.

The spring plunger is characterized in that a cylinder is arranged in the lower shell, one end of the cylinder is provided with an inclined plane, a spring column is arranged in the upper shell, a spring plunger which is movably connected is also arranged in the upper shell, and a spring structure is arranged between the spring column and the spring plunger in the upper shell.

The spring structure is four springs with different diameters, and soundproof cotton is arranged between every two adjacent springs.

And a friction element is arranged below the spring plunger in the upper shell, and the inner side of the friction element is obliquely arranged and matched with the inclined surface.

The two ends of the rotating shaft are provided with magnets, one end of the rotating shaft is further provided with an inductance rotor, the outer sides of the two ends of the rotating shaft are respectively provided with a first circuit board and a second circuit board, a first circuit cover plate is arranged outside the first circuit board, a second circuit cover plate is arranged outside the second circuit board, and a coil is further arranged in the base.

The first circuit board is provided with two inductance chips and a Hall chip, the Hall chip is matched with the magnet to detect whether the pedal is normal or not, and the two inductance chips are matched with the inductance rotor to detect whether the pedal is normal or not.

And the second circuit board is provided with a Hall chip, and the Hall chip and the magnet are matched with each other to detect whether the pedal is normal or not.

The beneficial effects of the utility model are as follows:

the pedal is compact and reasonable in structure and convenient to operate, the first arc-shaped groove and the second arc-shaped protrusion are matched with each other, and the first arc-shaped protrusion and the second arc-shaped groove are matched with each other to fix the force simulator in the pedal, so that the force simulator is prevented from moving up and down or shaking left and right, and meanwhile, the phenomenon of clamping stagnation of the force simulator when the pedal arm moves is avoided, the foot feeling is influenced, and even the function is influenced; the pedal arm is trampled, the pedal arm extrudes the simulator downwards, the upper shell of the force simulator moves downwards in the lower shell, the upper shell extrudes the spring plunger downwards through the spring structure, the spring plunger extrudes the friction element downwards, the friction element moves outwards along the inclined plane to extrude the upper shell, and the upper shell and the friction element rub to generate force hysteresis, so that driving comfort of a driver is facilitated to be improved.

Meanwhile, the utility model has the following advantages:

(1) The first circuit board is provided with two inductance chips, the two inductance chips are matched with an inductance rotor, the inductance scheme is used for realizing two-way output through the two inductance chips, the inductance rotor corresponds to an inductance coil, the inductance rotor works by changing the size of an output signal through electromagnetic induction, the inductance coil is provided with three groups of coils, each inductance coil comprises 1 TX (exciting coil) and 2 RX (induction coils), when the TX is electrified, the inductance coil and a copper foil on the inductance rotor generate a magnetic field, the RX coil generates induced electromotive force to generate voltage, and therefore, the rotating angle of a rotating shaft can be obtained by measuring the voltage.

(2) The first circuit board is also provided with a Hall chip, the Hall chip and the magnet are mutually matched to realize an angle Hall scheme, in the angle Hall scheme, the two-way output is realized through the Hall chip, the magnet corresponds to the Hall chip, the magnet is fixed on the rotating shaft, when the rotating shaft rotates, the magnet can generate a magnetic field, and the Hall sensor can detect the magnetic field. Due to the hall effect, the hall sensor generates a voltage, the magnitude of which is proportional to the angle at which the rotating shaft rotates. Thus, by measuring this voltage, the rotation angle of the rotation shaft can be obtained.

(3) Three detection schemes are designed on the pedal structure, and are all independently powered, six paths of outputs are provided, and if the synchronization degree of two paths of outputs in one scheme is abnormal, an upper ECU (electronic control unit) detects the fault code and informs a driver that the fault code needs to be detected and maintained in a 4S shop; further reduce the risk of failure, increase the security of driving.

(4) The original vacuum booster pump push rod assembly is replaced by the force simulator 3, phase-changing whole car components are reduced, space arrangement is reduced, and more flexible space design schemes are created for car cabin design.

(5) The reaction time of the brake-by-wire system is about 100ms, and the reaction time of the traditional hydraulic braking system is about 400 ms; therefore, the braking distance can be shortened, and the driving safety is further improved.

(6) Higher levels of autopilot functionality may be added through the scheme of electronic signals.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic view of section A-A of fig. 2.

Fig. 4 is an exploded view of the present utility model.

Fig. 5 is a schematic diagram of a force simulator of the present utility model.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a schematic view of section B-B of fig. 6.

Fig. 8 is a graph showing the pedal full stroke-stepping force versus displacement curve according to the present utility model.

Fig. 9 is a schematic diagram of a base and a first circuit board according to the present utility model.

Fig. 10 is a schematic diagram of a base and a second circuit board according to the present utility model.

Wherein: 1. a base; 101. a first cavity; 102. a rotation shaft; 103. a first circuit board; 104. a second circuit board; 105. a magnet; 106. an inductance rotor; 107. a first circuit cover plate; 108. a second circuit cover plate; 109. a wire harness; 110. an inductance coil; 2. a pedal arm; 201. a second arc-shaped protrusion; 3. a force simulator; 301. a first arcuate recess; 302. a first arc-shaped protrusion; 303. a lower housing; 3031. a column; 3032. an inclined surface; 304. an upper housing; 3041. a spring post; 305. a spring structure; 306. a spring plunger; 307. a friction element; 4. a force simulator base; 401. a second cavity; 402. and a second arc-shaped groove.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 1 to 7, a brake-by-wire pedal structure includes a base 1, a pedal arm 2, a force simulator 3, and a force simulator base 4. A first cavity 101 is formed in the base 1, one end of the pedal arm 2 is rotatably arranged in the first cavity 101 through a rotating shaft 102, a force simulator base 4 is arranged in the first cavity 101, and a second cavity 401 is formed in the force simulator base 4; a first arc-shaped groove 301 is formed in one end of the force simulator 3, a first arc-shaped protrusion 302 is formed in the other end of the force simulator 3, a second arc-shaped protrusion 201 matched with the first arc-shaped groove 301 is formed in the pedal arm 2, and a second arc-shaped groove 402 matched with the first arc-shaped protrusion 302 is formed in the force simulator base 4 in the second cavity 401; the first arc-shaped groove 301 is matched with the second arc-shaped protrusion 201, the first arc-shaped protrusion 302 is matched with the second arc-shaped groove 402 to fix the force simulator 3 in the pedal, the force simulator 3 is prevented from moving up and down or shaking left and right, and meanwhile the force simulator 3 moves along with the pedal arm 2 through the first arc-shaped groove 301, the second arc-shaped groove 402, the first arc-shaped protrusion 201 and the second arc-shaped protrusion 302, so that the clamping stagnation phenomenon of the force simulator 3 during the movement of the pedal arm 2 is avoided, the foot feeling is influenced, and even the function is influenced.

As shown in fig. 5 to 7, the force simulator 3 includes a lower case 303 and an upper case 304, a first arc-shaped groove 301 is provided at the top of the upper case 304, and a first arc-shaped protrusion 302 is provided at the bottom of the lower case 303; the lower shell 303 is internally provided with a column 3031, one end of the column 3031 is provided with an inclined surface 3032, the upper shell 304 is internally provided with a spring column 3041, the upper shell 304 is movably arranged in the lower shell 303, the upper shell 304 is positioned between the lower shell 303 and the column 3031, the upper shell 304 is internally provided with a movably connected spring plunger 306, a spring structure 305 is arranged between the spring plunger 306 and the spring column 3041, the spring structure 305 is composed of four springs with different diameters, and soundproof cotton is arranged between the adjacent springs. A friction element 307 is arranged below the spring plunger 306 in the upper shell 304, and the inner side of the friction element 307 is obliquely arranged and is attached to an inclined surface 3032 on the cylinder 3031.

When the pedal arm 2 is stepped on, the pedal arm 2 presses the simulator 3 downwards, so that the upper shell 304 of the force simulator 3 moves downwards in the lower shell 303, the upper shell 304 presses the spring plunger 306 downwards through the spring structure 305, the spring plunger 306 presses the friction element 307 downwards, the friction element 307 moves outwards along the inclined surface 3032 to press the upper shell 304, and the upper shell 304 and the friction element 307 rub to generate force stagnation, so that driving comfort of a driver is facilitated.

The original vacuum booster pump push rod assembly is replaced by the force simulator 3, phase-changing whole car components are reduced, space arrangement is reduced, and more flexible space design schemes are created for car cabin design.

The reaction time of the brake-by-wire system is about 100ms, and the reaction time of the traditional hydraulic braking system is about 400 ms; therefore, the braking distance can be shortened, and the driving safety is further improved.

The pedal travel and pedal force correspondence data are shown in the following table;

pedal travel/mm	Pedal force/N
		0	17.6905
4.2	18.8095
		8.4	19.9048
12.6	21.0238
		16.8	22.1190
18.9	22.6667
		23.1	26.2857
27.3	29.8810
		31.5	40.5714
35.7	51.2619
		39.9	68.2143
44.1	85.1429
		48.3	102.095
52.5	119.048
		56.7	135.976
60.9	152.929
		65.1	169.857

The pedal full stroke-pedaling force versus displacement curve is shown in fig. 8. Because four groups of springs with different wire diameters and lengths form the output of the stepping force, the nonlinear force and travel relation curve is output, and the foot feeling and the comfort feeling of the driver are better improved.

As shown in fig. 4, two magnets 105 are provided, one magnet 105 is provided at one end of the rotating shaft 102, a second circuit board 104 is provided outside the end of the rotating shaft 102, and a second circuit cover plate 108 is provided outside the second circuit board 104; the other end of the rotating shaft 102 is provided with another magnet 105 and an inductance rotor 106, a first circuit board 103 is arranged outside the end of the rotating shaft 102, a first circuit cover plate 107 is arranged outside the first circuit board 103, and the first circuit cover plate 107 and a second circuit cover plate 108 are detachably arranged on the base 1; a wire harness 109 is further provided in the base 1, an inductance coil 110 is further provided on the first circuit board 103, and metals such as copper foil, stainless steel, aluminum sheet and the like are provided in the inductance rotor 106.

The first circuit board 103 is provided with two inductance chips, the two inductance chips are mutually matched with the inductance rotor 106 and are used for realizing an inductance scheme, in the inductance scheme, two-way output is realized through the two inductance chips, the inductance rotor 106 corresponds to the inductance coil 110, the inductance coil 110 works by changing the output signal size through electromagnetic induction, the inductance coil 110 is provided with three groups of coils including 1 TX (exciting coil) and 2 RX (induction coil), when the TX is electrified, the TX and metal on the inductance rotor 103 generate a magnetic field, and the RX coil generates induced electromotive force to generate voltage, so that the rotation angle of the rotation shaft 102 can be obtained by measuring the voltage.

The first circuit board 103 is further provided with a hall chip, the hall chip and the magnet 105 are mutually matched to realize an angle hall scheme, in the angle hall scheme, two-way output is realized through the hall chip, the magnet 105 corresponds to the hall chip, the magnet 105 is fixed on the rotating shaft 102, when the rotating shaft 102 rotates, the magnet 105 can generate a magnetic field, and the hall sensor can detect the magnetic field. Due to the hall effect, the hall sensor generates a voltage, the magnitude of which is proportional to the angle at which the rotating shaft 102 rotates. Thus, by measuring this voltage, the rotation angle of the rotation shaft 102 can be obtained.

The second circuit board 104 is provided with a hall chip, which has the same function as the hall chip in the first circuit board 103, and also has a two-way output.

Three detection schemes are designed on the pedal structure, and are all independently powered, six paths of outputs are provided, and if the synchronization degree of two paths of outputs in one scheme is abnormal, an upper ECU (electronic control unit) detects the fault code and informs a driver that the fault code needs to be detected and maintained in a 4S shop; further reduce the risk of failure, increase the security of driving. Higher levels of autopilot functionality may be added through the scheme of electronic signals.

The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.

Claims

1. A linear control brake pedal structure, comprising:

a base (1);

the pedal arm (2) is rotatably arranged in the base (1), and a second arc-shaped bulge (201) is arranged at the bottom of the pedal arm (2);

the force simulator base (4) is arranged in the base (1), and a second arc-shaped groove (402) is formed in the force simulator base (4);

the force simulator (3) is arranged between the pedal arm (2) and the force simulator base (4), a first arc-shaped groove (301) corresponding to the second arc-shaped protrusion (201) is arranged on the force simulator (3), and a first arc-shaped protrusion (302) corresponding to the second arc-shaped groove (402) is arranged on the force simulator (3);

wherein, second arc protruding (201) and first arc recess (301) mutually support, and second arc recess (402) and first arc protruding (302) mutually support and are used for fixing force simulator (3).

2. A brake-by-wire pedal structure as defined in claim 1, wherein: be provided with first cavity (101) in base (1), pedal arm (2) rotate through rotation axis (102) and set up in first cavity (101), and force simulator base (4) set up in first cavity (101), are provided with second cavity (401) in force simulator base (4), and second arc recess (402) set up in second cavity (401).

3. A brake-by-wire pedal structure as defined in claim 1, wherein: the force simulator (3) comprises a lower shell (303) and an upper shell (304) movably arranged in the lower shell (303), wherein a first arc-shaped groove (301) is formed in the top of the upper shell (304), and a first arc-shaped protrusion (302) is formed in the bottom of the lower shell (303).

4. A brake-by-wire pedal structure as defined in claim 3, wherein: the spring plunger type spring device is characterized in that a cylinder (3031) is arranged in the lower shell (303), an inclined surface (3032) is arranged at one end of the cylinder (3031), a spring column (3041) is arranged in the upper shell (304), a movably connected spring plunger (306) is further arranged in the upper shell (304), and a spring structure (305) is arranged between the spring column (3041) and the spring plunger (306) in the upper shell (304).

5. A brake-by-wire pedal structure as defined in claim 4, wherein: the spring structure (305) is four springs with different diameters, and soundproof cotton is arranged between every two adjacent springs.

6. A brake-by-wire pedal structure as defined in claim 4, wherein: a friction element (307) is arranged below the spring plunger (306) in the upper shell (304), and the inner side of the friction element (307) is obliquely arranged and matched with the inclined surface (3032).

7. A brake-by-wire pedal structure as defined in claim 2, wherein: the two ends of the rotating shaft (102) are provided with magnets (105), one end of the rotating shaft (102) is further provided with an inductance rotor (106), the outer sides of the two ends of the rotating shaft (102) are respectively provided with a first circuit board (103) and a second circuit board (104), the first circuit board (103) is externally provided with a first circuit cover plate (107), the second circuit board (104) is externally provided with a second circuit cover plate (108), and a coil (109) is further arranged in the base (1).

8. A brake-by-wire pedal structure as defined in claim 7, wherein: two inductance chips and a Hall chip are arranged on the first circuit board (103), the Hall chip is matched with the magnet (105) to detect whether the pedal is normal, and the two inductance chips are matched with the inductance rotor (106) to detect whether the pedal is normal.

9. A brake-by-wire pedal structure as defined in claim 8, wherein: and a Hall chip is arranged on the second circuit board (104), and the Hall chip and the magnet (105) are matched with each other to detect whether the pedal is normal or not.