Pedal durability test device

Abstract

A pedal durability test device disclosed by the utility model comprises an environment simulation box and a fixing frame arranged in the environment simulation box, the fixing frame comprises a rear fixing plate, a front fixing plate and an adjustable platform, the rear fixing plate is vertically arranged on the rear side of the interior of the environment simulation box, the front fixing plate is vertically arranged on the front side of the interior of the environment simulation box, and the adjustable platform is arranged on the rear side of the interior of the environment simulation box. At least two horizontal connecting rods are connected between the bottom of the rear fixing plate and the bottom of the front fixing plate, the adjustable platform is arranged on the two horizontal connecting rods in a positionable mode, the front fixing plate is provided with a carrying plate which is adjustable in height and used for fixing a pedal plate, and the adjustable platform is provided with a cam mechanism used for conducting linear change on the treading force of the pedal plate. A power mechanism used for driving the cam mechanism to operate is arranged on the rear fixing plate. The device can be suitable for pedals with different treading strokes, the linear variable-diameter cam is matched with the wear-resisting plate fixed on the pedal, so that the treading force acting on the pedal can be linearly changed, and a high-analogue simulation test in a real environment is realized.

Description

Technical Field

[0001] This utility model relates to the field of automotive pedal durability testing equipment, specifically to a pedal durability testing device with high simulation accuracy that can adapt to different pedal strokes. Background Technology

[0002] Car pedals are a crucial safety component in automobiles. Their quality and lifespan directly impact driver safety. Automakers conduct numerous road tests during early development to verify component reliability and require suppliers to perform durability tests. For suppliers without the resources for road testing, simulated vehicle installation and durability testing are essential. However, current durability testing equipment is relatively scarce. Some equipment yields unsatisfactory results, failing to realistically simulate the actual working conditions of the pedal and lacking applicability. This is especially true for pedals with significant variations in pedal travel; existing pedal durability testing fixtures are often only suitable for a single specification or pedals with similar travel. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a foot pedal durability testing device with high simulation accuracy that can adapt to different pedal strokes.

[0004] The technical solution adopted by this utility model to achieve the above-mentioned technical effects is:

[0005] A foot pedal durability testing device is disclosed for conducting mechanical fatigue durability tests on automotive foot pedals. The foot pedal includes a crank connecting rod, a foot pedal mounting base connected and fixed to the crank connecting rod, and a foot pedal formed on the foot pedal end of the foot pedal mounting base. The foot pedal mounting base has diagonally distributed mounting holes. The foot pedal durability testing device includes an environmental simulation chamber with an open viewing window on one side and a fixed frame disposed in the environmental simulation chamber. The fixed frame includes a rear fixed plate, a front fixed plate, and an adjustable platform. The rear fixed plate is vertically disposed inside the rear side of the environmental simulation chamber, and the front fixed plate is vertically disposed inside the front side of the environmental simulation chamber. At least two horizontal connecting rods are connected between the bottom of the rear fixed plate and the front fixed plate. The adjustable platform is positionably disposed on the two horizontal connecting rods. The front fixed plate has a height-adjustable carrier plate for fixing the foot pedal. The adjustable platform has a cam mechanism for linearly varying the pedal pressure. The rear fixed plate has a power mechanism for driving the cam mechanism.

[0006] Preferably, in the above-mentioned foot pedal durability testing device, the power mechanism includes a servo motor detachably fixed to the rear side wall of the environmental simulation chamber, a bevel gearbox fixed to the inner side of the rear fixed plate, and a synchronous belt sleeved between the power output end of the bevel gearbox and the power input end of the cam mechanism.

[0007] Preferably, in the above-mentioned foot pedal durability testing device, the rear side wall of the environmental simulation chamber is provided with an opening, and a motor fixing plate is detachably connected to the opening. The body of the servo motor is fixed on the motor fixing plate, and the motor fixing plate is connected to the rear fixing plate by a number of fixing rods.

[0008] Preferably, in the above-mentioned foot pedal durability testing device, the adjustable platform is further provided with a belt tensioner sleeved on the synchronous belt, and the belt tensioner, the bevel gear box and the cam mechanism form a triangular positioning on a vertical plane.

[0009] Preferably, in the above-mentioned foot pedal durability testing device, the cam mechanism includes a synchronous shaft rotatably mounted on the adjustable platform, a synchronous gear fixed in the middle of the synchronous shaft, and at least one linear variable diameter cam fixed on the synchronous shaft. A wear-resistant plate that is in frictional contact with the wheel surface of the linear variable diameter cam is fixedly sleeved on the foot pedal. As the position of frictional contact between the wheel surface of the linear variable diameter cam and the wear-resistant plate changes, the pedaling force acting on the foot pedal changes linearly.

[0010] Preferably, in the above-mentioned foot pedal durability testing device, the adjustable platform has a clearance opening at the position corresponding to the linear variable diameter cam, and bearing supports are fixed on both sides of the clearance opening, and the synchronous rotating shaft is rotatably connected in the bearing supports.

[0011] Preferably, in the above-mentioned foot pedal durability testing device, the linear variable diameter cam is fixed on the synchronous rotating shaft by a positioning bushing with a spline, and the diameter of the wheel surface of the linear variable diameter cam increases linearly from the proximal end to the distal end.

[0012] Preferably, in the above-mentioned foot pedal durability testing device, the belt tensioner includes a fixed support fixed on the adjustable platform, an adjustable gear seat provided on the fixed support, and a tensioning gear fixed on the adjustable gear seat. The fixed support has a vertically extending strip-shaped slot. The gear shaft of the tensioning gear is rotatably connected to the adjustable gear seat through the strip-shaped slot. The upper end of the fixed support is provided with a screw fixing seat. A lifting adjustment screw is threadedly connected to the screw fixing seat. The lower end of the lifting adjustment screw is fixed to the upper end of the adjustable gear seat. The left and right sides of the adjustable gear seat are provided with strip-shaped holes that are positioned and connected to the fixed support.

[0013] Preferably, in the above-mentioned foot pedal durability testing device, a diagonal part of the carrier plate is connected to a claw via a tension adjustment screw, and the claw is provided with a positioning pin for engaging the mounting hole.

[0014] Preferably, in the above-mentioned foot pedal durability testing device, the inner wall of the front fixing plate is provided with a lifting adjustment mechanism corresponding to the middle of the bottom end face of the carrier plate, the carrier plate is provided with four strip-shaped positioning holes that are positioned and connected to the front fixing plate, and four screw holes for threaded connection of the foot pedal mounting base are provided in the middle of the carrier plate.

[0015] The beneficial effects of this utility model are as follows: The foot pedal durability testing device of this utility model can adjust the distance between the cam mechanism and the foot pedal fixed on the carrier plate through the adjustable platform. Combined with the adjustable height design of the carrier plate on the front fixed plate, the durability testing device can be applied to foot pedals with different pedal strokes. Through the cooperation of the linear variable diameter cam and the wear-resistant plate fixed on the foot pedal, the pedaling force can be linearly changed, realizing a high degree of simulation test under real use environment. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is a side view of the present invention from the open window side;

[0018] Figure 3 This is a structural diagram of the present invention with the environmental simulation chamber removed;

[0019] Figure 4 for Figure 3 Side view of the internal structure;

[0020] Figure 5 This is a diagram showing the usage state of the cam mechanism described in this utility model;

[0021] Figure 6 This is a structural diagram of the cam mechanism, belt tensioner, and bevel gearbox described in this utility model;

[0022] Figure 7 This is a structural diagram of the cam mechanism and foot pedal described in this utility model;

[0023] Figure 8 This is a side view of the linear variable diameter cam described in this utility model;

[0024] Figure 9 This is a structural diagram showing the connection between the wear-resistant plate and the foot pedal described in this utility model;

[0025] Figure 10This is an assembly drawing of the carrier plate and the front fixing plate described in this utility model;

[0026] Figure 11 This is a perspective view of the belt tensioner described in this utility model;

[0027] Figure 12 This is a perspective view of the foot pedal used for durability testing of this utility model. Detailed Implementation

[0028] To provide a further understanding of this utility model, the following description, with reference to the accompanying drawings and specific embodiments, will further illustrate the utility model:

[0029] In the description of this utility model, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 12 As shown in the figure, an embodiment of this utility model proposes a foot pedal durability testing device for conducting mechanical fatigue durability tests on an automobile foot pedal 100. Figure 12As shown, the foot pedal 100 includes a crank connecting rod 110, a foot pedal mounting base 120 connecting and fixing the crank connecting rod 110, and a foot pedal 140 formed on the foot pedal end of the foot pedal mounting base 120. The foot pedal mounting base 120 has diagonally distributed mounting holes 1201 and four screw mounting holes (not shown in the figure). The upper end of the crank connecting rod 110 is rotatably connected to the foot pedal mounting base 120 via a damped shaft 130. Durability testing includes fatigue loss testing of the crank connecting rod 110 and the shaft 130, and wear testing of the shaft 130. The durability test is completed after fracture or abnormality occurs. In different testing standards, internal cracks and stress changes in the crank connecting rod 110 and the shaft 130 can also be scanned using non-destructive testing. Specifically, as an embodiment of this utility model, such as... Figures 1 to 4 As shown, the foot pedal durability testing device includes an environmental simulation chamber 1 and a mounting frame 2 disposed within the environmental simulation chamber 1. The environmental simulation chamber 1 has an open viewing window 11 on one side. The mounting frame 2 includes a rear mounting plate 21, a front mounting plate 22, and an adjustable platform 23. Specifically, as... Figure 2 As shown, the rear fixing plate 21 is vertically installed inside the rear side of the environmental simulation chamber 1, and the front fixing plate 22 is vertically installed inside the front side of the environmental simulation chamber 1. Figure 3 As shown, at least two horizontal connecting rods 24 connect the bottom of the rear fixing plate 21 and the front fixing plate 22, and the adjustable platform 23 is positionably mounted on the two horizontal connecting rods 24. Figure 3 and Figure 4 As shown, the front fixed plate 22 is provided with a height-adjustable carrier plate 25 for fixing the foot pedal 100. The adjustable platform 23 is provided with a cam mechanism 3 for stepping on the foot pedal 140, wherein the stepping force output by the cam mechanism 3 to the foot pedal 140 varies linearly. The power of the cam mechanism 3 is provided by a power mechanism 4 provided on the rear fixed plate 21. By adjusting the position of the adjustable platform 23 on the horizontal connecting rod 24, the horizontal distance between the cam mechanism 3 and the foot pedal 140 can be adjusted. By adjusting the height of the carrier plate 25 on the front fixed plate 22, the vertical distance between the cam mechanism 3 and the foot pedal 140 can be adjusted. Through the above-mentioned adjustment of the horizontal and vertical positions, foot pedals of different models and specifications can be used in the foot pedal durability testing device of this utility model.

[0032] Furthermore, in a preferred embodiment of this utility model, such as Figure 3 and Figure 4As shown, the power mechanism 4 includes a servo motor 41 detachably fixed to the rear wall of the environmental simulation box 1, a bevel gearbox 42 fixed inside the rear fixing plate 21, and a synchronous belt 43 sleeved between the power output end of the bevel gearbox 42 and the power input end of the cam mechanism 3. The bevel gearbox 42 can convert the longitudinal power of the servo motor 41 into lateral power output. Specifically, as shown... Figure 1 , Figure 3 and Figure 4 As shown, the rear wall of the environmental simulation box 1 has an opening, and a motor mounting plate 12 is detachably connected to the opening. The body of the servo motor 41 is fixed to the motor mounting plate 12, and the motor mounting plate 12 is connected to the rear mounting plate 21 by several fixing rods 13. The motor shaft of the servo motor 41 is connected to the bevel gearbox 42 through the shaft hole on the motor mounting plate 12, and the direction of power output is changed by the cooperation of the internal bevel gears.

[0033] Furthermore, in a preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the adjustable platform 23 is also equipped with a belt tensioner 44 that is sleeved on the synchronous belt 43, through which the tension of the synchronous belt 43 can be adjusted. Specifically, as shown... Figure 4 As shown, the belt tensioner 44, the bevel gearbox 42, and the cam mechanism 3 form a triangular positioning on a vertical plane.

[0034] As a preferred embodiment of this utility model, such as Figure 6 , Figure 7 , Figure 8 As shown, the cam mechanism 3 includes a synchronous shaft 31 rotatably mounted on an adjustable platform 23, a synchronous gear 32 fixed in the middle of the synchronous shaft 31, and at least one linear variable-diameter cam 33 fixed on the synchronous shaft 31. To prevent frictional damage to the linear variable-diameter cam 33, such as... Figure 7 and Figure 9 As shown, a wear-resistant plate 5 is fixedly sleeved on the pedal 140, which rubs against the wheel surface of the linear variable diameter cam 33. This wear-resistant plate 5 reduces frictional damage between the linear variable diameter cam 33 and the wear-resistant plate 5. During the rotation of the linear variable diameter cam 33, the pedaling force acting on the pedal 140 changes linearly with the change in the frictional contact position between the wheel surface of the linear variable diameter cam 33 and the wear-resistant plate 5. Specifically, as... Figure 5 and Figure 6 As shown, the adjustable platform 23 has a clearance opening 231 at the position corresponding to the linear variable diameter cam 33. Bearing supports 34 are fixed on both sides of the clearance opening 231, and the synchronous rotating shaft 31 is rotatably connected to the bearing supports 34. Figure 8As shown, the linear variable diameter cam 33 is fixed to the synchronous rotating shaft 31 by a splined positioning sleeve 331. The diameter of the wheel surface of the linear variable diameter cam 33 increases linearly from the proximal end 332 to the distal end 333. When the proximal end 332 is opposite to the wear-resistant plate 5, there is no contact or only a slight contact force between them. As the linear variable diameter cam 33 rotates further, the diameter between the wheel surface and the wheel center gradually increases at the position away from the proximal end 332, that is, the pedal stroke acting on the wear-resistant plate 5 is greater, and the pedal force on the crank connecting rod 110 is greater at this time. When the distal end 333 abuts against the wear-resistant plate 5, the pedal stroke acting on the pedal 140 is at its maximum. As the linear variable diameter cam 33 rotates further, the wheel surface notch between its distal end 333 and proximal end 332 disengages from the wear-resistant plate 5. At this time, the linear variable diameter cam 33 does not have the function of stepping on the pedal 140. Until it rotates to the point where the proximal end 332 abuts against the wear-resistant plate 5, the linear variable diameter cam 33 continues to cycle the pedal 100 for the next round of stepping test.

[0035] Furthermore, in a preferred embodiment of this utility model, such as Figure 11 As shown, the belt tensioner 44 includes a fixed support 441 fixed on the adjustable platform 23, an adjustable gear seat 442 mounted on the fixed support 441, and a tensioning gear 443 fixed on the adjustable gear seat 442. The fixed support 441 has a vertically extending slot 4411, through which the gear shaft of the tensioning gear 443 is rotatably connected to the adjustable gear seat 442. A screw fixing seat 444 is provided at the upper end of the fixed support 441, and a lifting adjustment screw 445 is threaded into the screw fixing seat 444. The lower end of the lifting adjustment screw 445 is fixed to the upper end of the adjustable gear seat 442. The adjustable gear seat 442 has slots 4421 on its left and right sides that are positioned and connected to the fixed support 441. The height of the adjustable gear seat 442 on the fixed support 441 can be adjusted by lifting and adjusting screw 445. After adjustment, the adjustable gear seat 442 can be stably fixed on the fixed support 441 by tightening screws into the strip hole 4421.

[0036] Furthermore, in a preferred embodiment of this utility model, such as Figure 10 As shown, a diagonally opposite corner of the carrier plate 25 is connected to a claw 27 via a tension adjusting screw 28. This claw 27 has a positioning pin for engaging the mounting hole 1201. Figure 4 and Figure 5As shown, the inner wall of the front fixing plate 22 is provided with a lifting adjustment mechanism 26 corresponding to the middle of the bottom end face of the carrier plate 25. The height of the carrier plate 25 on the front fixing plate 22 can be adjusted by the lifting adjustment mechanism 26. The carrier plate 25 is provided with four strip-shaped positioning holes 251 that are positioned and connected to the front fixing plate 22, and four screw holes 252 for threaded connection of the foot pedal mounting base 120 are opened in the middle of the carrier plate 25. Specifically, the lifting adjustment mechanism 26 includes a screw seat 261 fixed to the lower part of the front fixing plate 22 and a height adjustment screw 262 threadedly connected to the screw seat 261. When it is necessary to adjust the height position of the carrier plate 25, first loosen the screws on the strip-shaped positioning holes 251, then rotate the height adjustment screw 262 to raise the carrier plate 25 to a set height, and then fix the carrier plate 25 to the front fixing plate 22 by the screws in the strip-shaped positioning holes 251.

[0037] Specifically, in some embodiments of this utility model, such as Figure 3 , Figure 4 and Figure 5 As shown, the horizontal connecting rod 24 has a threaded section 241 at one end near the front fixed plate 22, through which the distance between the front fixed plate 22 and the rear fixed plate 21 can be further adjusted. Figure 9 As shown, the upper and lower sides of the foot pedal 140 are formed with snap-fit ​​edges 1401, and the snap-fit ​​edges 1401 are provided with semi-open screw holes 1402. The upper and lower sides of the wear-resistant plate 5 are formed with arc-shaped transition portions 51, and the upper and lower sides are formed with bent ribs on the snap-fit ​​edge 1401 side. A snap-fit ​​groove 53 adapted to the snap-fit ​​edge 1401 is formed at the bent rib.

[0038] As a preferred embodiment of this utility model, such as Figure 5 As shown, there are two carrier plates 25, correspondingly, as Figure 6 As shown, two linear variable diameter cams 33 are also provided, which can enable the durability test of two foot pedals to be performed simultaneously.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.

Claims

1. A foot pedal durability testing device for performing mechanical fatigue durability testing on an automobile foot pedal (100), the foot pedal (100) including a crank connecting rod (110), a foot pedal mounting base (120) for connecting and fixing the crank connecting rod (110), and a foot pedal (140) formed on the foot pedal mounting base (120) at the foot pedal end, the foot pedal mounting base (120) having mounting holes (1201) distributed diagonally, the foot pedal durability testing device including an environmental simulation chamber (1) with an open viewing window (11) on one side and a fixing frame (2) disposed in the environmental simulation chamber (1), characterized in that, The fixing frame (2) includes a rear fixing plate (21), a front fixing plate (22), and an adjustable platform (23). The rear fixing plate (21) is vertically arranged inside the rear side of the environmental simulation box (1), and the front fixing plate (22) is vertically arranged inside the front side of the environmental simulation box (1). At least two horizontal connecting rods (24) are connected between the bottom of the rear fixing plate (21) and the front fixing plate (22). The adjustable platform (23) is positioned on the two horizontal connecting rods (24). The front fixing plate (22) is provided with a height-adjustable carrier plate (25) for fixing the foot pedal (100). The adjustable platform (23) is provided with a cam mechanism (3) for linearly changing the pedal force of the foot pedal (140). The rear fixing plate (21) is provided with a power mechanism (4) for driving the cam mechanism (3) to run.

2. The foot pedal durability testing device according to claim 1, characterized in that, The power mechanism (4) includes a servo motor (41) detachably fixed to the rear side wall of the environmental simulation box (1), a bevel gearbox (42) fixed to the inside of the rear fixed plate (21), and a synchronous belt (43) sleeved between the power output end of the bevel gearbox (42) and the power input end of the cam mechanism (3).

3. The foot pedal durability testing device according to claim 2, characterized in that, The rear side wall of the environmental simulation box (1) has an opening, and a motor mounting plate (12) is detachably connected to the opening. The body of the servo motor (41) is fixed on the motor mounting plate (12), and the motor mounting plate (12) and the rear fixing plate (21) are connected by several fixing rods (13).

4. The foot pedal durability testing device according to claim 2, characterized in that, The adjustable platform (23) is also provided with a belt tensioner (44) sleeved on the synchronous belt (43). The belt tensioner (44), the bevel gearbox (42), and the cam mechanism (3) form a triangular positioning on a vertical plane.

5. The foot pedal durability testing device according to claim 1, characterized in that, The cam mechanism (3) includes a synchronous shaft (31) rotatably mounted on the adjustable platform (23), a synchronous gear (32) fixed in the middle of the synchronous shaft (31), and at least one linear variable diameter cam (33) fixed on the synchronous shaft (31). A wear-resistant plate (5) is fixedly sleeved on the pedal (140) and makes frictional contact with the wheel surface of the linear variable diameter cam (33). As the position of frictional contact between the wheel surface of the linear variable diameter cam (33) and the wear-resistant plate (5) changes, the pedaling force acting on the pedal (140) changes linearly.

6. The foot pedal durability testing device according to claim 5, characterized in that, The adjustable platform (23) has a clearance opening (231) at the position corresponding to the linear variable diameter cam (33). Bearing supports (34) are fixed on both sides of the clearance opening (231), and the synchronous rotating shaft (31) is rotatably connected in the bearing supports (34).

7. The foot pedal durability testing device according to claim 5, characterized in that, The linear variable diameter cam (33) is fixed on the synchronous rotating shaft (31) by a positioning bushing (331) with a spline. The diameter of the wheel surface of the linear variable diameter cam (33) increases linearly from the proximal end (332) to the distal end (333).

8. The foot pedal durability testing device according to claim 4, characterized in that, The belt tensioner (44) includes a fixed support (441) fixed on the adjustable platform (23), an adjustable gear seat (442) provided on the fixed support (441), and a tensioning gear (443) fixed on the adjustable gear seat (442). The fixed support (441) has a vertically extending strip-shaped slot (4411). The gear shaft of the tensioning gear (443) is rotatably connected to the adjustable gear seat (442) through the strip-shaped slot (4411). The upper end of the fixed support (441) is provided with a screw fixing seat (444). A lifting adjustment screw (445) is threadedly connected to the screw fixing seat (444). The lower end of the lifting adjustment screw (445) is fixed to the upper end of the adjustable gear seat (442). The left and right sides of the adjustable gear seat (442) are provided with strip-shaped holes (4421) that are positioned and connected to the fixed support (441).

9. The foot pedal durability testing device according to claim 1, characterized in that, One diagonal of the carrier plate (25) is connected to a claw (27) via a tension adjustment screw (28), and the claw (27) is provided with a positioning pin for engaging the mounting hole (1201).

10. The foot pedal durability testing device according to claim 1, characterized in that, The inner wall of the front fixing plate (22) is provided with a lifting adjustment mechanism (26) corresponding to the middle of the bottom end face of the carrier plate (25). The carrier plate (25) is provided with four strip-shaped positioning holes (251) that are positioned and connected to the front fixing plate (22). Four screw holes (252) for threaded connection of the foot pedal mounting base (120) are opened in the middle of the carrier plate (25).

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