Pedal cover wear detection device

Abstract

The utility model discloses a pedal cover wear -resisting detection equipment, including bottom plate, lifting mechanism and controller, lifting mechanism is fixed on the bottom plate, is equipped with counterweight in the lifting seat top surface of lifting mechanism, is equipped with force sensor on the lifting seat bottom surface in the lifting mechanism, is equipped with clamping assembly on the detection end of tensile sensor, is equipped with pedal cover support on the lower extreme of clamping assembly, be equipped with guide sliding slot on the bottom plate, be equipped with friction trolley in guide sliding slot, the top surface of friction trolley can be in friction contact with the detection piece on pedal cover support, be equipped with servo electric push cylinder of driving friction trolley on the bottom plate, the controller is used for controlling friction trolley and lifting mechanism, the utility model discloses adjusting the positional relationship of pedal cover and friction block in traditional mode, can thoroughly solve the precision and experiment stability problem, has improved pedal cover wear -resisting detection's repeatability and accuracy greatly.

Description

Technical Field

[0001] This utility model belongs to the field of wear resistance testing equipment for automotive parts, and in particular, it is a wear resistance testing device for pedal covers. Background Technology

[0002] Brake pedal and clutch pedal covers play a crucial role in a vehicle's overall functionality and performance: 1) Anti-slip and operational stability: Brake pedal covers typically feature rubber, metal, or anti-slip textures, increasing friction between the foot and the pedal, especially in rainy or snowy weather or when the driver's shoes are wet, preventing slippage and ensuring precise braking during emergencies. 2) Protecting original pedals: Long-term use can lead to wear or corrosion on the original pedal surface. Installing pedal covers reduces direct wear on metal or plastic pedals, extending their lifespan. 3) Enhancing driving comfort: Pedal covers are made of soft materials, alleviating fatigue from prolonged use, especially suitable for urban driving conditions requiring frequent braking. 4) Differentiating functional areas: Helping drivers quickly identify the brake pedal location, reducing the risk of accidentally pressing the accelerator.

[0003] If the brake pedal sleeve is not wear-resistant or is worn through, it can cause very serious consequences while driving: 1) Abnormal pedal feel: When the brake pedal sleeve is worn through, the friction on the pedal surface changes. The originally designed pedal friction allows the driver to accurately perceive the pressure applied, but after wear, the friction may increase or decrease. For example, if the friction decreases, the driver may experience slippage when pressing the pedal, making it difficult to accurately control the depth and force of the press, thus affecting the braking effect. 2) Changes in travel: Wear on the pedal sleeve may cause changes in the pedal travel. Under normal circumstances, the brake pedal has a specific range of travel to achieve different levels of braking. When the pedal sleeve is worn, it may increase or decrease the effective travel of the pedal, causing the actual braking effect to be inconsistent with expectations when the driver operates according to past habits. For example, if the travel is longer, the driver needs to press deeper to achieve the same braking effect, which may delay time and increase braking distance during emergency braking. 3) Damage to the pedal surface: After the pedal sleeve is worn through, the brake pedal is directly exposed to the outside environment, and frequent pressing will cause wear and scratches on the pedal surface. Damage to the pedal surface not only affects its appearance but may also damage its original structure, reducing its strength and durability. Long-term use may lead to cracks or even breakage, affecting the normal operation of the braking system. 4) Impact on the pedal mounting bracket: If debris from worn pedal sleeves enters the gap between the pedal and the mounting bracket, it may affect the normal movement of the pedal and increase wear on the mounting bracket. Severe wear on the pedal mounting bracket may cause the pedal to loosen, wobble, or even affect the connection between the brake pedal and other components of the braking system, leading to braking malfunctions.

[0004] The aforementioned abnormal pedal feel, altered travel, and damage to the pedal and related components can all increase the risk of brake failure. In extreme cases, if the brake pedal malfunctions, the vehicle will completely lose its braking ability, which is extremely dangerous and could lead to a serious traffic accident.

[0005] Therefore, choosing reliable and wear-resistant pedal covers is crucial. For suppliers of pedal assemblies, testing the wear resistance of pedal covers before shipment is especially important, making a high-performance pedal cover wear resistance testing device essential. Currently, traditional testing methods are as follows: Figure 1 As shown, its structure includes a pressure block 1001, a friction block 1002 on the bottom surface of the pressure block directly placed on the pedal sleeve 1003, and one end of the pressure block connected to a cylinder 1005 via a ball joint 1004. The cylinder is activated, and its reciprocating motion rubs against the pedal sleeve. However, this detection method has two problems: 1) The inherent defects of cylinder drive: poor control precision of frequency and displacement, making it impossible to guarantee consistent friction stroke each time, resulting in poor repeatability; 2) Using a ball joint structure to connect the friction block end to the cylinder and place it directly on the pedal sleeve causes nonlinear trajectory and unstable state of the friction block during its forward and backward movements, and the friction block may even detach from the pedal sleeve and fall directly to the ground, greatly reducing the accuracy of the detection results. Utility Model Content

[0006] This invention provides a device for testing the wear resistance of pedal sleeves, aiming to solve the problems of low accuracy and poor experimental stability in existing testing methods.

[0007] To solve the above-mentioned technical problems, the present invention provides a wear-resistance testing device for pedal covers, comprising a base plate, a lifting mechanism, and a controller. The lifting mechanism is fixed to the base plate. The device is characterized by: a counterweight on the top surface of the lifting seat in the lifting mechanism; a force sensor on the bottom surface of the lifting seat in the lifting mechanism; a clamping assembly on the detection end of the force sensor; and a pedal cover bracket on the lower end of the clamping assembly. The base plate has a guide groove, within which a friction trolley is positioned. The top surface of the friction trolley can rub against the detection component on the pedal cover bracket. The base plate has a servo electric cylinder for driving the friction trolley. The controller is used to control the friction trolley and the lifting mechanism.

[0008] Further defining the above technical solution, the structure of the counterweight includes a fixed shaft, which is vertically fixed to the top surface of the lifting seat in the lifting mechanism. Multiple stacked counterweights are mounted on the fixed shaft, and the counterweights are hollow cylinders.

[0009] Further defining the above technical solution, the clamping assembly comprises a fixed clamping plate and a movable clamping plate. The top of the fixed clamping plate is fixedly connected to a tension sensor, and the lower end of the fixed clamping plate cooperates with the movable clamping plate to clamp the connecting block of the pedal sleeve bracket.

[0010] Further defining the above technical solution, the structure of the pedal sleeve bracket includes a pedal piece, a connecting block is vertically provided on the back of the pedal piece, and a limiting nut is provided on the top side of the connecting block. The limiting nut cooperates with the nut slot in the clamping assembly to limit the pedal sleeve bracket.

[0011] Further defining the above technical solution, the structure of the friction trolley includes a friction block, a layer of EPDM rubber on the top surface of the friction block, a pair of rollers on opposite sides of the friction block, the rollers being made of polytetrafluoroethylene (PTFE), and guide grooves on the base plate guiding the rollers.

[0012] To further define the above technical solution, the servo electric actuator is connected to the friction carriage via a fisheye bearing.

[0013] Beneficial effects: 1) The counterweight system composed of the lifting seat and counterweight in the lifting mechanism ensures that the force applied to the surface of the pedal sleeve remains constant during the forward and backward movement of the friction carriage, and also ensures the stability of the reciprocating motion of the friction carriage in the guide groove; 2) The use of servo electric push cylinder control can ensure the stability of the stroke and frequency of the reciprocating motion of the friction carriage; 3) This technology is very practical for improving the wear resistance testing of current automotive pedal sleeves, and fundamentally solves the problems of unstable frequency and displacement control and unstable friction trajectory, greatly improving the repeatability and accuracy of pedal sleeve wear resistance testing, and is suitable for widespread promotion. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of existing detection methods.

[0015] Figure 2 This is a structural diagram of the utility model.

[0016] Figure 3 yes Figure 2 A three-dimensional image.

[0017] Figure 4 This is a structural diagram of the pedal cover bracket. Detailed Implementation

[0018] like Figure 2 and Figure 3As shown, a pedal cover wear resistance testing device includes a base plate 1, a lifting mechanism 2, and a controller 3. The lifting mechanism is fixed to the base plate. A counterweight 4 is provided on the top surface of the lifting seat in the lifting mechanism, and a force sensor 5 is provided on the bottom surface of the lifting seat in the lifting mechanism. A clamping assembly 6 is provided on the detection end of the test tension sensor, and a pedal cover bracket 7 is provided on the lower end of the clamping assembly. The base plate is provided with a guide groove 8, and a friction trolley 9 is provided in the guide groove. The top surface of the friction trolley can make frictional contact with the test piece on the pedal cover bracket. A servo electric push cylinder 10 for driving the friction trolley is provided on the base plate. The controller is used to control the friction trolley and the lifting mechanism.

[0019] like Figure 2 and Figure 3 As shown, the structure 2 of the lifting mechanism includes a support 201, a lead screw 202, a guide rod 203, a lifting seat 204, and a servo motor 205. The upper and lower ends of the lead screw are connected to the support through bearings, the upper and lower ends of the guide rod are fixedly connected to the support, the threaded hole on the lifting seat engages with the lead screw, the sliding hole on the lifting seat is slidably connected to the guide rod, and the servo motor is fixed on the top of the support.

[0020] like Figure 2 and Figure 3 As shown, the controller 3 mainly consists of a force sensor display, a 24V switching power supply, an electric cylinder, and a servo motor control switch; the controller is a conventional technology and common knowledge in this field, and no circuit connection description is provided.

[0021] like Figure 2 and Figure 3 As shown, the structure of the counterweight 4 includes a fixed shaft 401, which is vertically fixed to the top surface of the lifting seat in the lifting mechanism. Multiple stacked counterweights 402 are mounted on the fixed shaft, and the counterweights are hollow cylinders. This structure is simple, has low manufacturing cost, and the weight of the counterweights can be easily increased or decreased according to customer standards.

[0022] like Figure 2 and Figure 3 As shown, the clamping assembly 6 has the following structure: it includes a fixed clamping plate 601 and a movable clamping plate 602. The top of the fixed clamping plate is fixedly connected to the tension sensor, and the lower end of the fixed clamping plate cooperates with the movable clamping plate to clamp the connecting block of the pedal sleeve bracket. That is, the fixed clamping plate and the movable clamping plate are clamped by bolt tightening force. This structure is simple, has low manufacturing cost, and is flexible in loading and unloading.

[0023] like Figure 3 and Figure 4As shown, the structure of the pedal sleeve bracket 7 includes a pedal piece 701, a connecting block 702 vertically mounted on the back of the pedal piece, and a limiting nut 703 welded to the top side of the connecting block. The limiting nut engages with a nut slot in the clamping assembly to restrict the pedal sleeve bracket. The nut is a hexagonal nut, and a hexagonal slot is provided on the movable clamping plate in the clamping assembly corresponding to the nut. During testing, to avoid small-angle deflection or loosening of the pedal sleeve bracket due to friction, the nut is used for limiting, ensuring the accuracy of the test results.

[0024] like Figure 2 and Figure 3 As shown, the structure of the friction trolley 9 includes a friction block 901, a layer of EPDM rubber 902 on the top surface of the friction block, and a pair of rollers 903 on opposite sides of the friction block. The rollers are made of polytetrafluoroethylene (PTFE), and guide grooves on the base plate guide the rollers. The friction trolley uses rolling friction, and the rollers are made of a material with a low coefficient of friction, which helps improve the accuracy of the test results.

[0025] like Figure 2 and Figure 3 As shown, the servo electric push cylinder 10 is connected to the friction carriage 9 via a fisheye bearing 11; that is, one end of the fisheye bearing is connected to the push rod on the friction carriage, and the other end of the fisheye bearing is connected to the piston rod of the servo electric push cylinder. When the friction carriage reciprocates at high speed, the short fisheye bearing can maintain a stable operating state, reduce the generation of vibration, and help improve the accuracy of the detection results.

[0026] Instructions for use: The servo electric cylinder moves back and forth, driving the friction carriage to move linearly at a uniform speed in the front and back direction, rubbing the pedal sleeve in the front and back direction; This utility model essentially changes the pneumatic control to electric control, and at the same time adjusts the positional relationship between the pedal sleeve and the friction block in the traditional method, which can completely solve the problems of accuracy and experimental stability, and greatly improve the repeatability and accuracy of the wear resistance test of the pedal sleeve.

Claims

1. A foot pedal cover wear resistance testing device, comprising a base plate, a lifting mechanism, and a controller, wherein the lifting mechanism is fixed on the base plate, characterized in that: The lifting mechanism has a counterweight on the top surface of the lifting seat and a force sensor on the bottom surface of the lifting seat. The force sensor has a clamping assembly on its detection end and a pedal sleeve bracket on its lower end. The base plate has a guide groove, and a friction trolley is installed in the guide groove. The top surface of the friction trolley can make frictional contact with the detection component on the pedal sleeve bracket. The base plate has a servo electric cylinder for driving the friction trolley. The controller is used to control the friction trolley and the lifting mechanism.

2. The pedal cover wear resistance testing device according to claim 1, characterized in that: The structure of the counterweight includes a fixed shaft, which is vertically fixed to the top surface of the lifting seat in the lifting mechanism. Multiple stacked counterweight blocks are fitted on the fixed shaft, and the counterweight blocks are hollow cylinders.

3. The pedal cover wear resistance testing device according to claim 1 or 2, characterized in that: The clamping assembly consists of a fixed clamping plate and a movable clamping plate. The top of the fixed clamping plate is fixedly connected to a tension sensor, and the lower end of the fixed clamping plate cooperates with the movable clamping plate to clamp the connecting block of the pedal sleeve bracket.

4. The pedal cover wear resistance testing device according to claim 3, characterized in that: The structure of the pedal sleeve bracket includes a pedal piece, a connecting block vertically provided on the back of the pedal piece, and a limiting nut provided on the top side of the connecting block. The limiting nut cooperates with the nut slot in the clamping assembly to limit the pedal sleeve bracket.

5. The pedal cover wear resistance testing device according to claim 1, 2, or 4, characterized in that: The structure of the friction trolley includes a friction block, a layer of EPDM rubber on the top surface of the friction block, and a pair of rollers on opposite sides of the friction block. The rollers are made of polytetrafluoroethylene (PTFE), and the guide groove on the base plate guides the rollers.

6. The pedal cover wear resistance testing device according to claim 5, characterized in that: The servo electric actuator is connected to the friction carriage via a fisheye bearing.

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