CN101846567B - Brake pedal force simulating device - Google Patents

Abstract

The invention discloses a brake pedal force simulation device, which is characterized in that a cylinder with a control element is arranged on the frame, the piston rod of the cylinder is threadedly connected with a connecting head, and the connecting head is fixedly connected with a The synchronous plate on the side is equipped with a pressure sensor at the front end of the joint head. The front end roller of the pressure sensor presses against the brake pedal fixed on the frame in the direction of stepping on the brake pedal. On one side of the cylinder and the piston rod In parallel with each other, a pop-up displacement sensor is arranged, and the contact of the pop-up displacement sensor is against the synchronous plate. As an automobile brake system test device, the invention can realize the simulation of the process of stepping on the brake pedal, and has the advantages of simple structure, convenient layout, precise control and high degree of automation.

Description

Brake pedal force simulator

technical field

The invention belongs to automobile bench test equipment, more specifically, a pedal force simulation device for realizing the action of stepping on the brake pedal in the test of the automobile braking system.

Background technique

The automobile braking system is an important link to ensure the safety of vehicles and personnel. In modern automobile testing, the performance test of the braking system is particularly important. More and more tests involve the control and simulation of the braking process, as well as the brake pedal force. , brake travel, brake line pressure and other data collection.

Most of the current brake system experimental equipment directly uses the hydraulic station to provide hydraulic power for the brake pipeline. Although the pressure of the brake pipeline can be effectively controlled, there is no real and effective simulation of the process of depressing the brake pedal for braking. , It is impossible to collect and research parameters such as brake pedal force, pedal stroke, and real vehicle brake pedal, vacuum booster, and brake master cylinder.

Contents of the invention

The present invention provides a brake pedal force simulation device for avoiding the disadvantages of the above existing methods, and provides a reliable reference basis for related experiments on the input end of the brake pedal.

The technical scheme that the present invention solves technical problem adopts is:

The structural feature of the brake pedal force simulation device of the present invention is that a cylinder with a control element is arranged on the frame, the piston rod of the cylinder is threadedly connected with the connecting head, and the connecting head is fixedly connected with a The synchronous plate is provided with a pressure sensor at the front end of the connecting head, and the front end roller of the pressure sensor abuts against the brake pedal fixedly arranged on the frame in the direction of stepping on the brake pedal, and on one side of the cylinder . Parallel to the piston rod, a pop-up displacement sensor is arranged, and the contact of the pop-up displacement sensor is against the synchronization plate.

The structural features of the brake pedal force simulation device of the present invention also lie in:

The frame is: a mounting base plate, a pedal bracket and a cylinder bracket respectively arranged, and the vertical and lateral positions of the pedal bracket and the cylinder bracket are respectively adjustable on the mounting base plate.

An inclination adjustment plate is set in cooperation with the cylinder bracket, a longitudinal U-shaped hole is arranged on the cylinder bracket, and a transverse U-shaped hole parallel to the extension direction of the cylinder piston rod is arranged on the inclination adjustment plate, and the longitudinal U-shaped hole and the transverse U The holes are fixedly connected by bolts, and the cylinder is fixedly arranged on the inclination adjustment plate.

The control element of the cylinder is a proportional reversing valve that can adjust the movement speed of the cylinder and change the movement direction of the cylinder.

The invention realizes the simulation of the force of the brake pedal through the connection of simple mechanical structures and the use of an electric control cylinder to drive and step on the brake pedal. Compared with existing methods, the beneficial effects of the present invention are reflected in:

1. The present invention is controlled by a computer and can conduct various types of braking system experiments according to the set parameters, with a high degree of automation;

2. The invention is a self-contained system without interference from other systems, easy to disassemble and move, and can be used in conjunction with braking systems of various specifications;

3. The present invention can adapt to brake pedals of different specifications and sizes by adjusting the position and angle of the mounting bracket, and has strong versatility;

4. The cylinder control of the present invention adopts a proportional reversing valve, which can adjust the movement speed of the cylinder in a real-time and linear manner, cooperate with the signal feedback of the displacement and pressure sensors to form a closed-loop control circuit, and can accurately control the simulation process of the pedal force according to the pressure or stroke requirements;

5. The present invention can be equipped with a variety of sensors for simultaneously detecting the vacuum degree of the vacuum booster. Parameters such as brake line pressure provide reliable parameters for brake system experiments.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the schematic diagram of frame structure of the present invention;

Fig. 3 is a schematic diagram of the arrangement structure of each sensor of the present invention.

Numbers in the figure: 1 Installation base plate, 2 Cylinder bracket, 3 Proportional directional valve, 4 Cylinder fixture block, 5 Displacement sensor rear support, 6 Tilt adjustment plate, 7 Cylinder, 8 Pop-up displacement sensor, 9 Displacement sensor front support, 10 Connecting head, 11 synchronous plate, 12 pressure sensor, 13 brake pedal device, 14 pedal bracket, 15 cylinder limit block.

Detailed ways

Referring to Fig. 1, present embodiment is to be provided with the air cylinder 7 that has control element on the frame, the piston rod of air cylinder is threadedly connected with connecting head 10, is fixedly connected with the synchronous plate 11 that stretches to one side on connecting head 10, in The front end of the connector 10 is provided with a pressure sensor 12, and the front end roller of the pressure sensor 12 abuts against the brake pedal fixedly arranged on the frame according to the direction of stepping on the brake pedal, and is parallel to the piston rod on one side of the cylinder 7. , a pop-up displacement sensor 8 is provided, and the contact of the pop-up displacement sensor is against the synchronization plate 11 .

In the specific implementation, as shown in Fig. 1 and Fig. 2, the frame is an installation base plate 1, a pedal support 14 and a cylinder support 2 respectively, and the pedal support 14 and the cylinder support 2 are respectively vertical and horizontal on the described installation base plate 1. The position is adjustable.

As shown in Fig. 2, an inclination adjustment plate 6 is set in cooperation with the cylinder bracket 2, a longitudinal U-shaped hole is arranged on the cylinder bracket 2, and a transverse U-shaped hole parallel to the extending direction of the cylinder piston rod is set on the inclination adjustment plate 6. The U-shaped hole and the transverse U-shaped hole are fixedly connected by bolts, and the cylinder 7 is fixedly arranged on the inclination adjustment plate 6, so that the inclination angle of the cylinder 7 can be adjusted.

Cylinder stop block 15 is fixedly set on tilt adjustment plate 6, and the bottom of cylinder 7 leans against on the cylinder stop block 15, and each cylinder clamp block 4 is fastened on the side of cylinder 7, utilizes long screw to cylinder clamp block 4 together Cylinder 7 is locked on the tilt adjustment plate 6.

The control element of the cylinder 7 adopts the proportional reversing valve 3 which can adjust the movement speed of the cylinder and change the movement direction of the cylinder.

In specific implementation, the pedal bracket 14 is arranged in an "L" shape, and is provided with a top card slot and a top mounting hole on its top for installing the brake pedal device 13, and is provided with a through hole at its bottom, and can be fitted with bolts and nuts. The pedal bracket 14 is fixedly installed on the installation base plate 1, and the installation position can be adjusted appropriately through the long holes on the installation base plate 1.

The brake pedal device 13 is fixed in the top draw-in groove of the pedal bracket 14 with the piston rod in the middle thereof, and passes through the top mounting hole with a long bolt, and cooperates with nuts to lock and fix the brake pedal device 13 and the pedal bracket 14 . The brake pedal device 13 is a real vehicle device, including a pedal, a vacuum booster, a brake master cylinder, and the like.

The installation method of the displacement sensor 8 and the pressure sensor 12 is shown in FIG. 3 . Set the displacement sensor 8 in the displacement sensor front bracket 9 and the displacement sensor rear bracket 5, and lock them with screws. The front support 9 of the displacement sensor and the rear support 5 of the displacement sensor are fixedly installed on the cylinder 7 by the mounting screws on the cylinder 7 . The front support 9 of the displacement sensor and the rear support 5 of the displacement sensor jointly ensure that the ejection direction of the contact of the displacement sensor 8 is parallel to the direction of motion of the piston rod of the cylinder 7 .

The experiment process is controlled by a computer. The control signal drives the cylinder 7 to move through the proportional reversing valve 3, and then the brake pedal is stepped on. The pressure of the cylinder 7 is adjusted through the feedback signal of the pipeline pressure in the brake pipeline or the pedal displacement or pedal pressure. Movement speed until the end of the braking process. During this process, the displacement and pressure of the brake pedal are collected separately, which can be used to analyze the performance of the brake pedal input and its relationship with the brake pipeline pressure and brake torque.

Claims (4)

1. The brake pedal force simulation device is characterized in that a cylinder (7) with a control element is set on the frame, and the piston rod of the cylinder is threaded with the connection head (10), and at the connection head (10) A synchronous plate (11) extending to one side is fixedly connected to the top, and a pressure sensor (12) is set at the front end of the connector (10), and the pressure sensor (12) is pressed according to the pressure of the brake pedal with its front end roller. Direction against the brake pedal fixedly arranged on the frame, on one side of the cylinder (7), parallel to the piston rod, a pop-up displacement sensor (8) is set, the pop-up displacement sensor ( The contacts of 8) are against the synchronous plate (11). 2. The brake pedal force simulation device according to claim 1, characterized in that said frame is: a mounting base plate (1), a pedal bracket (14) and a cylinder bracket (2) respectively provided with, said pedal bracket (14) and the cylinder bracket (2) are respectively adjustable in longitudinal and lateral positions on the said installation base plate (1). 3. The brake pedal force simulation device according to claim 2, characterized in that an inclination adjustment plate (6) is arranged in cooperation with the cylinder support (2), a longitudinal U-shaped hole is set on the cylinder support (2), and the inclination adjustment A horizontal U-shaped hole parallel to the extension direction of the cylinder piston rod is set on the plate (6), and the longitudinal U-shaped hole and the horizontal U-shaped hole are fixedly connected by bolts, and the cylinder (7) is fixed on the tilt adjustment plate (6) up. 4. The brake pedal force simulation device according to claim 1, characterized in that the control element of the cylinder (7) is a proportional reversing valve (3) that can adjust the moving speed of the cylinder and change the moving direction of the cylinder.

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