A durability test tool for a pedal-type parking brake mechanism

Abstract

The technical field of the durability test fixtures involved in the present invention is specifically a durability test fixture for a foot-operated parking brake mechanism. It includes a linear slide rail, and a pair of swing cylinder assemblies symmetrically arranged at both ends of the linear slide rail; each swing cylinder assembly includes a cylinder, a U-shaped plate, a swing cylinder and a pressure plate with a connecting rod arranged in sequence along the extension direction of the linear slide rail, and the U-shaped plate and the swing cylinder are both slidably fitted on the linear slide rail through a slider; the parking brake mechanism is fixedly installed in the middle of the linear slide rail through a mounting frame, and since the output shaft of the swing cylinder extends horizontally and is fixedly connected to the connecting rod of the pressure plate, when the swing cylinder is close to the foot-operated parking brake mechanism, the pressure plate cooperates with the pedal of the parking brake mechanism, and the pressure plate continuously presses the pedal driven by the output shaft of the swing cylinder, simulating the working state of the parking brake mechanism when the vehicle is started or parked, and performing a durability test on the foot-operated parking brake mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of durability test tooling, in particular to a durability test tooling of a pedal-type parking brake mechanism. Background Art

[0002] At present, the parking brake on forklifts and cars is generally a handbrake structure, and some cars and forklifts have begun to use a pedal-type parking brake mechanism instead of a handbrake structure. Figure 3 As shown, the working process of the foot-operated parking brake mechanism is as follows: after parking, the parking brake mechanism is stepped on, the zipper connected to the parking brake mechanism is tightened, and the brake works; before the vehicle starts, the parking brake mechanism is stepped on, and the parking brake mechanism is released. The foot-operated parking brake mechanism is labor-saving and convenient to use, and has promotion value. As a new mechanism, the durability of the mechanism needs to be verified, but at present, the foot-operated parking brake mechanism does not have the corresponding durability test tooling, and there is no relevant tooling to support the test. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a durability test tool for a pedal-operated parking brake mechanism, which simulates the working state of the parking brake mechanism when starting or parking, and performs a durability test on the pedal-operated parking brake mechanism. The specific technical scheme is as follows:

[0004] A durability test tool for a pedal-type parking brake mechanism, comprising a linear slide rail 1, and a pair of swing cylinder assemblies symmetrically arranged at both ends of the linear slide rail 1;

[0005] Each swing cylinder assembly includes a cylinder 21, a U-shaped plate 22, a swing cylinder 23 and a pressure plate 24 with a connecting rod, which are arranged in sequence along the extension direction of the linear slide rail 1;

[0006] The cylinder 21 is fixed to the end of the linear guide rail 1 through a fixing frame 211, the piston rod of the cylinder 21 extends horizontally and is fixedly connected to the corresponding side plate of the U-shaped plate 22, the other side plate of the U-shaped plate 22 is fixedly connected to the swing cylinder 23, and the output shaft of the swing cylinder 23 extends horizontally and is fixedly connected to the connecting rod of the pressure plate 24;

[0007] The parking brake mechanism 3 is fixedly mounted on the middle part of the linear guide rail 1 by screw fixing of the mounting frame 31 and the parking brake mechanism 3 mounting bracket, and the U-shaped plate 22 and the swing cylinder 23 are both slidably fitted on the linear guide rail 1 through the slider;

[0008] The pair of sway cylinders of the pair of sway cylinder assemblies are driven by the piston rods of the corresponding cylinders 21 to alternately approach the foot-operated parking brake mechanism, and when approaching, the pressure plate 24 cooperates with the pedal of the parking brake mechanism 3, and the pedal is continuously pressed under the drive of the output shaft of the sway cylinder 23, simulating the working state of the parking brake mechanism 3 when the vehicle is started or parked.

[0009] Furthermore, each of the fixing frame 211 and the mounting frame 31 is a right-angle bent plate, and a notch is provided in the middle of the lower part of the vertical plate of the right-angle bent plate, so that the right-angle bent plate is mounted on the corresponding linear slide rail 1;

[0010] The horizontal plate of each right-angle bent plate is fixedly connected to the mounting platform, and the vertical plate of the mounting frame 31 is fixedly connected to the mounting bracket of the parking brake mechanism 3; a cylinder frame is provided on the outer fixed cover of each cylinder 21, and the cylinder frame is fixedly connected to the vertical plate of the corresponding fixed frame 211, so that the cylinder 21 is horizontally arranged at the end of the linear slide rail 1.

[0011] Furthermore, the pedal movement stroke value of the parking brake mechanism 3 is 51°; one of the swing cylinders 23 on a pair of swing cylinder assemblies is a test cylinder for parking the vehicle, and its movement stroke value is 40°, and the other swing cylinder 23 is a test cylinder for starting the vehicle, and its movement stroke value is 45°.

[0012] The beneficial technical effects of the present invention are as follows:

[0013] The durability test tool of the present invention comprises a linear slide rail and a pair of swing cylinder assemblies symmetrically arranged at both ends of the linear slide rail;

[0014] Each sway cylinder assembly includes a cylinder, a U-shaped plate, a sway cylinder and a pressure plate with a connecting rod which are arranged in sequence along the extension direction of the linear slide rail. The U-shaped plate and the sway cylinder are both slidably fitted on the linear slide rail through a slider; the parking brake mechanism is fixedly mounted in the middle of the linear slide rail through a mounting frame; a pair of sway cylinders of a pair of sway cylinder assemblies alternately approach the foot-operated parking brake mechanism under the drive of the corresponding cylinder piston rods. Since the output shaft of the sway cylinder extends horizontally and is fixedly connected to the connecting rod of the pressure plate, when the sway cylinder approaches the foot-operated parking brake mechanism, the pressure plate cooperates with the pedal of the parking brake mechanism, and the pressure plate continuously applies pressure to the pedal under the drive of the sway cylinder output shaft, simulating the working state of the parking brake mechanism when the vehicle is started or parked, and a durability test is performed on the foot-operated parking brake mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the durability test tooling of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the parking brake mechanism of the present invention.

[0017] Figure 3 This is a diagram showing the use status of the durability test tooling of the present invention.

[0018] Among them: 1 linear guide rail, 21 cylinder, 211 fixing frame, 22 U-shaped plate, 23 swing cylinder, 24 pressure plate, 3 parking brake mechanism, 31 mounting frame. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0020] See Figure 1 A durability test fixture for a foot-operated parking brake mechanism comprises a linear slide rail 1 and a pair of sway cylinder assemblies symmetrically arranged at both ends of the linear slide rail 1; each sway cylinder assembly comprises a cylinder 21, a U-shaped plate 22, a sway cylinder 23 and a pressure plate 24 with a connecting rod which are sequentially arranged along the extension direction of the linear slide rail 1.

[0021] The cylinder 21 is fixed to the end of the linear guide rail 1 through a fixing frame 211, the piston rod of the cylinder 21 extends horizontally and is fixedly connected to the corresponding side plate of the U-shaped plate 22, the other side plate of the U-shaped plate 22 is fixedly connected to the swing cylinder 23, and the output shaft of the swing cylinder 23 extends horizontally and is fixedly connected to the connecting rod of the pressure plate 24;

[0022] like Figure 2 The parking brake mechanism 3 shown is fixed by the thread of the mounting frame 31 and the parking brake mechanism 3 mounting bracket, so that the parking brake mechanism 3 is fixedly mounted on the middle part of the linear slide rail 1, and the U-shaped plate 22 and the swing cylinder 23 are both slidably fitted on the linear slide rail 1 through the slider;

[0023] The pair of sway cylinders of the pair of sway cylinder assemblies are driven by the piston rods of the corresponding cylinders 21 to alternately approach the foot-operated parking brake mechanism, and when approaching, the pressure plate 24 cooperates with the pedal of the parking brake mechanism 3, and the pedal is continuously pressed under the drive of the output shaft of the sway cylinder 23, simulating the working state of the parking brake mechanism 3 when the vehicle is started or parked.

[0024] Each of the fixing frame 211 and the mounting frame 31 is a right-angle bent plate, and a notch is provided in the middle of the lower part of the vertical plate of the right-angle bent plate, so that the right-angle bent plate is mounted on the corresponding linear slide rail 1;

[0025] The horizontal plate of each right-angle bent plate is fixedly connected to the mounting platform, and the vertical plate of the mounting frame 31 is fixedly connected to the mounting bracket of the parking brake mechanism 3; a cylinder frame is provided on the outer fixed cover of each cylinder 21, and the cylinder frame is fixedly connected to the vertical plate of the corresponding fixed frame 211, so that the cylinder 21 is horizontally arranged at the end of the linear slide rail 1.

[0026] The pedal movement stroke value of the parking brake mechanism 3 is 51°; one of the pair of swing cylinder assemblies 23 is a test cylinder for parking the vehicle, and its movement stroke value is 40°, and the other swing cylinder 23 is a test cylinder for starting the vehicle, and its movement stroke value is 45°.

[0027] See Figure 3The specific working process of the durability test tooling is as follows:

[0028] First, install the test piece:

[0029] The parking brake mechanism 3 mounting bracket and the mounting frame 31 are bolted and connected.

[0030] Then set up the test trip:

[0031] The design stroke value of the parking brake mechanism 3 is 51 degrees (this value is different for different mechanisms). The left-side swing cylinder 23 is a test cylinder of the mechanism when the vehicle is parked and braked, and the movement stroke of the left-side swing cylinder 23 is set to about 40 degrees; the right-side swing cylinder 23 is a test cylinder of the mechanism when the vehicle is started, and the movement stroke of the right-side swing cylinder 23 is set to about 45 degrees.

[0032] Final test:

[0033] The air circuit of the air cylinder 21 on the left is connected, and the piston rod extends, pushing the U-shaped plate 22 on the left to drive the swing cylinder 23 on the left to move right, and the air circuit of the swing cylinder 23 on the left is connected when the U-shaped plate 22 on the left is pushed to the right, and the swing cylinder 23 on the left drives the pressure plate 24 on the left through the connecting rod on the left, and the pressure plate 24 on the left presses the pedal of the parking brake mechanism 3 to perform the parking test of the parking brake mechanism, and the swing cylinder 23 on the left works to the set angle, and the air circuits of the air cylinder 21 on the left and the swing cylinder 23 on the left are disconnected at the same time, and the swing cylinder 23 on the left returns to its original position, and the left cylinder 21 returns to its original position while driving the swing cylinder 23 on the left connected to the U-shaped plate 22 on the left to move left, and the vehicle parking test of the parking brake mechanism is completed;

[0034] The air circuit of the right cylinder 21 is connected, the piston rod extends, pushes the right U-shaped plate 22 to drive the left swing cylinder 23 to move left, reaches the appropriate position and connects the air circuit of the right swing cylinder 23, the right swing cylinder 23 drives the right pressure plate 24 through the right connecting rod, the right pressure plate 24 presses the pedal of the parking brake mechanism 3 to perform the parking test of the parking brake mechanism, the right swing cylinder 23 works to the set angle, and at the same time disconnects the air circuits of the right cylinder 21 and the right swing cylinder 23, the right swing cylinder 23 returns to its original position, and at the same time, the right cylinder 21 returns to its original position and drives the right swing cylinder 23 connected to the right U-shaped plate 22 to move right, completing the vehicle start test of the parking brake mechanism;

[0035] After the vehicle starting test of the parking brake mechanism 3 is completed, the vehicle parking test of the mechanism is continued, so that the vehicle parking test and the vehicle starting test are performed alternately to achieve the durability test of the test piece.

[0036] After the vehicle start test of the parking brake mechanism is completed, the vehicle parking test of the mechanism is continued, so that the vehicle parking test and the vehicle start test are performed alternately to achieve the durability test of the test piece. It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 present invention.

Claims

1. A durability test tool for a pedal-type parking brake mechanism, characterized in that: It comprises a linear slide rail (1), and a pair of swing cylinder assemblies symmetrically arranged at two ends of the linear slide rail (1); Each swing cylinder assembly comprises a cylinder (21), a U-shaped plate (22), a swing cylinder (23) and a pressure plate (24) with a connecting rod, which are arranged in sequence along the extension direction of the linear slide rail (1); The cylinder (21) is fixed to the end of the linear slide rail (1) via a fixing frame (211); the piston rod of the cylinder (21) extends horizontally and is fixedly connected to the corresponding side plate of the U-shaped plate (22); the other side plate of the U-shaped plate (22) is fixedly connected to the swing cylinder (23); the output shaft of the swing cylinder (23) extends horizontally and is fixedly connected to the connecting rod of the pressure plate (24); The parking brake mechanism (3) is fixedly mounted on the middle part of the linear slide rail (1) by threaded fixing of the mounting frame (31) and the parking brake mechanism (3) mounting bracket, and the U-shaped plate (22) and the swing cylinder (23) are both slidably fitted on the linear slide rail (1) by means of a slider; The pair of sway cylinders of the pair of sway cylinder assemblies are driven by the piston rods of the corresponding cylinders (21) to alternately approach the foot-operated parking brake mechanism, and when approaching, the pressure plate (24) cooperates with the foot pedal of the parking brake mechanism (3), and the foot pedal is continuously pressed under the drive of the output shaft of the sway cylinder (23), simulating the working state of the parking brake mechanism (3) when the vehicle is started or parked; Each of the fixing frame (211) and the mounting frame (31) is a right-angle bent plate, and a notch is provided in the middle of the lower part of the vertical plate of the right-angle bent plate, so that the right-angle bent plate is mounted on the corresponding linear slide rail (1); The horizontal plate of each right-angle bent plate is fixedly connected to the mounting platform, and the vertical plate of the mounting frame (31) is fixedly connected to the mounting bracket of the parking brake mechanism (3); the outer fixed cover of each cylinder (21) is provided with a cylinder frame, and the cylinder frame is fixedly connected to the vertical plate of the corresponding fixed frame (211), so that the cylinder (21) is horizontally arranged at the end of the linear slide rail (1); The pedal movement stroke value of the parking brake mechanism (3) is 51°; one of the pair of swing cylinder assemblies (23) is a test cylinder for parking the vehicle, and has a movement stroke value of 40°; the other swing cylinder (23) is a test cylinder for starting the vehicle, and has a movement stroke value of 45°.

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