Connecting rod bushing rotation wear testing device

Abstract

The utility model relates to the technical field of a connecting rod bushing rotation wear test device, and solves the problems that a bushing easily shakes on the surface of a rotating rod due to centrifugal force generated by rotation, a structure is lacked for limiting installation of the bushing, and the wear test accuracy is prevented from being influenced. The device comprises a workbench, a driving assembly is fixedly connected to the top surface of the workbench, a polishing structure is arranged in the workbench, a magnetic suction pad is fixed to the position, adjacent to the polishing structure, of the top surface of the workbench, and a detachable protective cover is connected to the top surface of the magnetic suction pad in a magnetic suction mode. The surface of the workbench is fixedly connected with a frame, the frame is arranged on the top face of the workbench in a striding mode and fixes detection equipment, the driving assembly comprises a driving motor, a mounting rod, an annular air bag, an extrusion plate and an air inlet one-way valve, the driving motor is fixed to the top face of the workbench, the output end of the driving motor is connected with the mounting rod, and the annular air bag is fixed to the surface of the mounting rod. Multiple extrusion plates are distributed on the outer surface of the air bag in an annular array.

Description

Technical Field

[0001] This utility model relates to the technical field of connecting rod bushing rotational wear testing device, specifically a connecting rod bushing rotational wear testing device. Background Technology

[0002] The bushing rotational wear testing device disclosed in CN222166801U includes a connecting block. A spring is fixedly installed on one side of the connecting block, and an auxiliary structure is fixedly installed on one end of the spring. The auxiliary structure includes a mounting plate, a mounting groove, a threaded groove, a threaded rod, a limiting plate, a handle, a bearing, a clamping block, and anti-slip stripes. The mounting plate is fixedly installed on one end of the spring. The mounting plate has a mounting groove on its front side and a threaded groove inside the mounting groove. A threaded rod is threadedly connected to the temporal part of the threaded groove. A limiting plate is fixedly installed on one end of the threaded rod, and a handle is fixedly installed on one end of the limiting plate. The other end of the threaded rod is rotatably connected to a bearing. A clamping block is fixedly installed on one end of the bearing, and several anti-slip stripes are provided on the circumferential side of the clamping block.

[0003] The grinding block can be disassembled and replaced by turning the two handles to unscrew the two threaded rods outward, thereby moving the clamping block backward. The operation is convenient and improves practicality.

[0004] Although the technical solution in the prior art document has the effect of conveniently fixing the bushing, the defects are also more obvious. For example, the bushing is prone to shaking on the surface of the rotating rod due to the centrifugal force generated by rotation, and there is no structure to limit its installation to avoid affecting the accuracy of wear test. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a connecting rod bushing rotational wear testing device, which solves the problem that the bushing is prone to shaking on the surface of the rotating rod due to the centrifugal force generated by rotation, and lacks a structure to limit its installation and avoid affecting the accuracy of wear testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a connecting rod bushing rotation wear testing device, comprising a worktable, a drive assembly fixedly connected to the top surface of the worktable, a grinding structure provided inside the worktable, a magnetic pad fixed to the top surface of the worktable adjacent to the grinding structure, a detachable protective cover magnetically connected to the top surface of the magnetic pad, and a frame fixedly connected to the surface of the worktable, the frame spanning the top surface of the worktable and fixing the testing equipment.

[0007] The drive assembly includes a drive motor, a mounting rod, an annular airbag, a compression plate, and an air inlet check valve. The drive motor is fixed to the top surface of the worktable, and its output end is connected to the mounting rod. The annular airbag is fixed to the surface of the mounting rod, and multiple compression plates are distributed in an annular array on the outer surface of the airbag. An air inlet with an air inlet check valve is provided on the side.

[0008] The grinding structure includes an electric push rod, a mounting slot, and a grinding block. The electric push rod is fixed to the inner top wall of the worktable, and its output end passes through the worktable and connects to the mounting slot. The grinding block is fixed to the top surface of the mounting slot.

[0009] In a specific embodiment, after the annular airbag inflates, it forms a friction-fixed structure with the inner wall of the connecting rod bushing through the extrusion plate, and the one-way air intake valve is connected to an external air source to form an airbag inflation passage.

[0010] In one specific embodiment, the magnetic pad is arranged around the polishing structure, and the protective cover is made of transparent material and completely covers the working area of ​​the drive component and the polishing block.

[0011] In one specific embodiment, the detection device includes a visual sensor for monitoring the degree of wear and an accelerometer for detecting vibration signals, both integrated on the transverse support rod of the frame.

[0012] In one specific embodiment, the extension stroke of the electric push rod is coaxial with the lifting path of the grinding block, and the surface of the grinding block is provided with a replaceable wear-resistant coating.

[0013] In one specific embodiment, the frame is a portal frame structure, with its two side columns fixed to the edge of the top surface of the workbench.

[0014] Compared with the prior art, this utility model provides a connecting rod bushing rotational wear testing device, which has the following beneficial effects:

[0015] In the technical solution disclosed in this utility model, after the annular airbag of the drive component is inflated, it forms a flexible friction fixation with the inner wall of the bushing through the extrusion plate, which suppresses the bushing displacement caused by centrifugal force during high-speed rotation; at the same time, the grinding structure controls the grinding block to contact the outer surface of the bushing with constant pressure, so as to avoid uneven wear caused by bushing shaking.

[0016] With the drive assembly and grinding structure designed in this utility model, after the bushing of the connecting rod to be tested is placed on the surface of the extrusion plate of the drive assembly, the annular airbag is inflated through the air inlet one-way valve. The expansion of the airbag pushes the extrusion plate to form multi-point friction fixation with the inner wall of the bushing, eliminating the bushing shaking caused by centrifugal force during rotation. At the same time, the electric push rod fixed on the top wall of the worktable drives the grinding block at the top of the mounting slot to accurately abut against the outer surface of the bushing along the coaxial lifting path, effectively avoiding the impact on the accuracy of the wear test. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the drive component structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the grinding structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the disassembled structure of this utility model.

[0022] In the diagram: 1. Workbench; 2. Drive assembly; 21. Drive motor; 22. Mounting rod; 23. Airbag; 24. Extrusion plate; 25. Inlet check valve; 3. Grinding structure; 31. Electric push rod; 32. Mounting slot; 33. Grinding block; 4. Magnetic pad; 5. Protective cover; 6. Frame; 7. Testing equipment. Detailed Implementation

[0023] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Figures 1-4 In one embodiment of this utility model, a connecting rod bushing rotational wear testing device includes a worktable 1, a drive assembly 2 fixedly connected to the top surface of the worktable 1, a grinding structure 3 provided inside the worktable 1, a magnetic pad 4 fixed to the top surface of the worktable 1 adjacent to the grinding structure 3, a detachable protective cover 5 magnetically connected to the top surface of the magnetic pad 4, and a frame 6 fixedly connected to the surface of the worktable 1, the frame 6 spanning the top surface of the worktable 1 and fixing the testing equipment 7.

[0025] The specific problem addressed in this embodiment is the lack of a structure to limit and fix the bushing due to centrifugal force generated by rotation, thus affecting the accuracy of wear testing. This invention utilizes the inflated annular airbag 23 of the drive assembly 2, which, through the compression plate 24, forms a flexible friction fixation with the inner wall of the bushing, suppressing bushing displacement caused by centrifugal force during high-speed rotation. Simultaneously, the grinding structure 3 controls the grinding block 33 to contact the outer surface of the bushing with constant pressure, preventing uneven wear caused by bushing wobbling.

[0026] The drive assembly 2 includes a drive motor 21, a mounting rod 22, an annular airbag 23, a compression plate 24, and an air inlet check valve 25. The drive motor 21 is fixed to the top surface of the worktable 1, and its output end is connected to the mounting rod 22. The annular airbag 23 is fixed to the surface of the mounting rod 22. Multiple compression plates 24 are distributed in an annular array on the outer surface of the airbag 23, and an air inlet with an air inlet valve 25 is provided on the side. The grinding structure 3 includes an electric push rod 31, a mounting groove 32, and a grinding block 33. The electric push rod 31 is fixed to the inner top wall of the worktable 1, and its output end passes through the worktable 1 and connects to the mounting groove 32. The grinding block 33 is fixed to the top surface of the mounting groove 32. In this specific embodiment, after the annular airbag 23 expands, it forms a friction fixing structure with the inner wall of the connecting rod bushing through the compression plate 24, and the air inlet check valve 25 is connected to an external air source to form an airbag inflation passage. After the bushing of the connecting rod to be tested is placed on the surface of the extrusion plate 24 of the drive assembly 2, the annular airbag 23 is inflated through the air inlet check valve 25. The expansion of the airbag pushes the extrusion plate 24 to form multi-point friction fixation with the inner wall of the bushing, eliminating the bushing shaking caused by centrifugal force during rotation. At the same time, the electric push rod 31 fixed on the inner top wall of the worktable 1 drives the grinding block 33 on the top of the mounting groove 32 to accurately abut against the outer surface of the bushing along the coaxial lifting path, effectively avoiding the impact on the accuracy of the wear test.

[0027] In this specific embodiment, after the annular airbag 23 is inflated, it forms a friction fixing structure with the inner wall of the connecting rod bushing through the extrusion plate 24, and the air intake one-way valve 25 is connected to the external air source to form an airbag inflation passage.

[0028] After the airbag 23 is inflated, it pushes the compression plate 24 to abut against the inner wall of the bushing at multiple points. The flexible fixation effectively absorbs the centrifugal force of rotation and avoids radial displacement of the bushing, which would cause the test data to be distorted.

[0029] The magnetic pad 4 surrounds the polishing structure 3, and the protective cover 5 is made of transparent material and completely covers the working area of ​​the drive component 2 and the polishing block 33.

[0030] The magnetic pad 4 enables quick and sealed installation of the protective cover 5. The transparent cover blocks debris from flying while allowing visual monitoring of the contact status between the grinding block 33 and the bushing.

[0031] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0032] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connecting rod bushing rotational wear test apparatus comprising a workbench (1), characterized in that: The top surface of the workbench (1) is fixedly connected to a drive assembly (2), and the workbench (1) is provided with a grinding structure (3). A magnetic pad (4) is fixed on the top surface of the workbench (1) adjacent to the grinding structure (3). A detachable protective cover (5) is magnetically connected to the top surface of the magnetic pad (4). A frame (6) is fixedly connected to the surface of the workbench (1). The frame (6) spans the top surface of the workbench (1) and fixes the testing equipment (7). The drive assembly (2) includes a drive motor (21), a mounting rod (22), an annular airbag (23), a compression plate (24), and an air inlet check valve (25). The drive motor (21) is fixed to the top surface of the workbench (1), and its output end is connected to the mounting rod (22). The annular airbag (23) is fixed on the surface of the mounting rod (22). Multiple compression plates (24) are distributed in an annular array on the outer surface of the airbag (23), and an air inlet with an air inlet check valve (25) is provided on the side. The grinding structure (3) includes an electric push rod (31), a mounting groove (32) and a grinding block (33). The electric push rod (31) is fixed to the inner top wall of the worktable (1), and its output end passes through the worktable (1) and connects to the mounting groove (32). The grinding block (33) is fixed on the top surface of the mounting groove (32).

2. A connecting rod bushing rotational wear test apparatus as set forth in claim 1, characterized by: After the annular airbag (23) expands, it forms a friction-fixed structure with the inner wall of the connecting rod bushing through the extrusion plate (24), and the air intake one-way valve (25) is connected to the external air source to form an airbag inflation passage.

3. A connecting rod bushing rotational wear test apparatus as set forth in claim 1 wherein: The magnetic pad (4) is arranged around the polishing structure (3), and the protective cover (5) is made of transparent material and completely covers the working area of ​​the drive component (2) and the polishing block (33).

4. A connecting rod bushing rotational wear test apparatus as set forth in claim 1 wherein: The detection device (7) includes a visual sensor for monitoring the degree of wear and an accelerometer for detecting vibration signals, both integrated on the transverse support rod of the frame (6).

5. A connecting rod bushing rotational wear test apparatus as set forth in claim 1 wherein: The extension stroke of the electric push rod (31) is coaxial with the lifting path of the grinding block (33), and the surface of the grinding block (33) is provided with a replaceable wear-resistant coating.

6. A connecting rod bushing rotational wear test apparatus as set forth in claim 1 wherein: The frame (6) is a portal structure, with its two side columns fixed to the top edge of the workbench (1).

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