Active loading device of bearing bush fatigue testing machine

Abstract

The utility model relates to an active loading device of a bearing bush fatigue testing machine, which comprises a mounting frame, a detection device and a hydraulic cylinder, the detection device and the hydraulic cylinder are mounted at the top of the mounting frame, a dismounting assembly is mounted on the mounting frame, a damping assembly is mounted on the mounting frame, and the dismounting assembly comprises a mounting seat fixedly mounted at the bottom of the inner wall of the mounting frame. A mounting plate is fixedly mounted at the top of the mounting seat, and two lead screws are fixedly mounted on one side of the mounting plate. According to the active loading device of the bearing bush fatigue testing machine, by installing the disassembling assembly, when the hydraulic air cylinder needs to be replaced, the hydraulic air cylinder can be rapidly and conveniently disassembled from the device, operation is easy, the disassembling and maintaining efficiency can be easily shortened, and the practicability of the device is improved; and when the placing plate moves up and down, damping treatment can be performed on the placing plate, so that the placing plate is more stable in the moving process, and the detection quality of the bearing bush is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue testing machines, in particular to an active loading device of a bearing fatigue testing machine. Background Art

[0002] Sliding bearings (such as main bearings and connecting rod bearings) are key wear-reducing parts for automotive engines, and are subject to large alternating stresses. The bearings, crankshafts, and connecting rods form important friction pairs, and have the functions of parallelizing the axis, positioning the wheelbase, and reducing friction and wear, so that the engine can operate reliably and durably under conditions of different speeds, different loads, and different operating temperatures. A fatigue testing machine is required when testing the bearings.

[0003] The loading system in the fatigue testing machine is the core part, responsible for applying the load. Common loading methods include hydraulic loading, pneumatic loading, electric loading, etc. In general, the hydraulic cylinder in the fatigue testing machine is connected to the device through a fixed installation. When the hydraulic cylinder is damaged, it is not convenient to disassemble and replace it, which reduces the practicality of the device. This application proposes another technical solution to solve this technical problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an active loading device for a bearing fatigue testing machine, which has the advantages of easy disassembly and shock absorption, and solves the problem that the hydraulic cylinder in the fatigue testing machine is generally connected to the device through a fixed installation, and when the hydraulic cylinder is damaged, it is not convenient to disassemble and replace it, thereby reducing the practicability of the device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an active loading device for a bearing fatigue testing machine, comprising a mounting frame, a detection device mounted on the top of the mounting frame, and a hydraulic cylinder, a disassembly assembly is mounted on the mounting frame, and a shock absorbing assembly is mounted on the mounting frame;

[0006] The disassembly assembly includes a mounting seat fixedly mounted on the bottom of the inner wall of the mounting frame, a mounting plate fixedly mounted on the top of the mounting seat, two screw rods fixedly mounted on one side of the mounting plate, and nuts are threadedly connected to the outer sides of the two screw rods;

[0007] The top of the mounting seat is slidably connected to a limiting plate, the bottom of the limiting plate is fixedly mounted with a sliding block, and the output end of the hydraulic cylinder is slidably connected to a connecting block.

[0008] Furthermore, the shock absorbing assembly includes a placement plate fixedly mounted on the top of the connecting block, two shock absorbing springs are fixedly mounted on the top of the mounting frame, and two dampers are fixedly mounted on the top of the mounting frame.

[0009] Furthermore, the output ends of the two dampers are fixedly mounted with moving blocks, the tops of the two moving blocks are hinged with mounting rods hinged to the bottom of the placement plate, and both sides of the connecting blocks are threadedly connected with bolts.

[0010] Furthermore, a first sliding groove is provided on the top of the mounting seat, and the sliding block is slidably connected to the mounting seat through the first sliding groove.

[0011] Furthermore, a first sliding groove is provided on the top of the mounting seat, and the sliding block is slidably connected to the mounting seat through the first sliding groove.

[0012] Furthermore, a second sliding groove is provided on the front side of the connecting block, and the output end of the hydraulic cylinder is slidably connected to the connecting block through the second sliding groove.

[0013] Furthermore, threaded holes are provided on both sides of the connection block, and the bolts are threadedly connected to the connection block through the threaded holes.

[0014] Furthermore, a third sliding groove is provided on the top of the installation frame, and the moving block is slidably connected to the installation frame through the third sliding groove.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] The active loading device of the bearing fatigue testing machine is equipped with a disassembly component, so that when the hydraulic cylinder needs to be replaced, the hydraulic cylinder can be quickly and conveniently disassembled from the device. The operation is simple, which is beneficial to shortening the disassembly and maintenance efficiency and improving the practicality of the device. By installing a shock-absorbing component, the placement plate can be shock-absorbing when it moves up and down, so that the placement plate is more stable during movement, thereby improving the inspection quality of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 A magnified view of the structure in the middle;

[0019] Figure 3 For this utility model Figure 1 Middle B is an enlarged view of the structure;

[0020] Figure 4 It is a stereoscopic diagram of the connection relationship among the mounting plate, the screw rod and the nut of the utility model.

[0021] In the figure: 1. Installation frame; 2. Detection device; 3. Hydraulic cylinder; 4. Mounting seat; 5. Mounting plate; 6. Screw rod; 7. Nut; 8. Limit plate; 9. Slider; 10. Connecting block; 11. Placement plate; 12. Shock-absorbing spring; 13. Damper; 14. Moving block; 15. Mounting rod; 16. Bolt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 An active loading device of a bearing fatigue testing machine in this embodiment includes a mounting frame 1, a detection device 2 installed on the top of the mounting frame 1, and a hydraulic cylinder 3. A disassembly component is installed on the mounting frame 1, and a shock absorbing component is installed on the mounting frame 1.

[0024] The disassembly assembly includes a mounting base 4 fixedly installed on the bottom of the inner wall of the mounting frame 1, a mounting plate 5 fixedly installed on the top of the mounting base 4, two screw rods 6 fixedly installed on one side of the mounting plate 5, and two through holes are opened inside the limiting plate 8. The screw rods 6 extend to the outside of the limiting plate 8 through the through holes, and nuts 7 are threadedly connected to the outside of the two screw rods 6.

[0025] The top of the mounting seat 4 is slidably connected to the limiting plate 8, and a slider 9 is fixedly installed at the bottom of the limiting plate 8. A first sliding groove is opened on the top of the mounting seat 4, and the slider 9 is slidably connected to the mounting seat 4 through the first sliding groove, providing guidance for the movement of the limiting plate 8, making the movement of the limiting plate 8 more convenient.

[0026] The output end of the hydraulic cylinder 3 is slidably connected with a connecting block 10, and a second sliding groove is provided on the front of the connecting block 10. The output end of the hydraulic cylinder 3 is slidably connected with the connecting block 10 through the second sliding groove. When the hydraulic cylinder 3 is started, the connecting block 10 is driven to move up and down for coordination.

[0027] It should be noted that the active loading device of the bearing fatigue testing machine is equipped with a disassembly component, which can facilitate the rapid and convenient disassembly of the hydraulic cylinder 3 from the device when the hydraulic cylinder 3 needs to be replaced. The operation is simple, which is conducive to shortening the disassembly and maintenance efficiency and improving the practicality of the device.

[0028] Specifically, when the active loading device of the bearing fatigue testing machine needs to disassemble the hydraulic cylinder 3, the threaded connection between the two nuts 7 and the screw rod 6 is released, and then the limit plate 8 is pushed to the left to move, the threaded connection between the two bolts 16 and the connecting block 10 is released, and the bolts 16 are pulled out from the hydraulic cylinder 3 to facilitate the user to disassemble the hydraulic cylinder 3 from the device. The above steps are performed in reverse during installation, which is simple to operate, helps to shorten the disassembly and maintenance efficiency, and improves the practicality of the device.

[0029] The shock absorbing assembly includes a placement plate 11 fixedly mounted on the top of the connection block 10 , two shock absorbing springs 12 are fixedly mounted on the top of the installation frame 1 , and two dampers 13 are fixedly mounted on the top of the installation frame 1 .

[0030] The output ends of the two dampers 13 are fixedly installed with moving blocks 14, and a third sliding groove is opened on the top of the installation frame 1. The moving block 14 is slidably connected with the installation frame 1 through the third sliding groove, providing guidance for the movement of the moving block 14, making the movement of the moving block 14 more convenient.

[0031] The tops of the two moving blocks 14 are both hinged with mounting rods 15 hinged with the bottom of the placement plate 11 , and both sides of the connecting block 10 are both threadedly connected with bolts 16 .

[0032] Threaded holes are provided on both sides of the connecting block 10, and the bolts 16 are threadedly connected to the connecting block 10 through the threaded holes. Clamping grooves are provided on both sides of the output end of the hydraulic cylinder 3, and the bolts 16 are clamped to the hydraulic cylinder 3 through the clamping grooves, so as to facilitate the fixed installation and connection between the connecting block 10 and the hydraulic cylinder 3.

[0033] It should be noted that the active loading device of the bearing fatigue testing machine is equipped with a shock absorbing assembly, which can perform shock absorbing treatment on the placement plate 11 when the placement plate 11 moves up and down, so that the placement plate 11 is more stable during movement, thereby improving the inspection quality of the bearing.

[0034] Specifically, when the active loading device of the bearing fatigue testing machine is used, the bearing to be tested is placed on the placement plate 11, and then the hydraulic cylinder 3 is started to drive the placement plate 11 to move upward, and the two moving blocks 14 are driven to move in the opposite direction through the installation rod 15, driving the shock-absorbing spring 12 and the damper 13 to stretch. When the moving plate 11 moves up and down, the shock-absorbing spring 12 and the damper 13 are synchronously stretched and compressed and adjusted, thereby making the placement plate more stable during movement, thereby improving the detection quality of the bearing.

[0035] The working principle of the above embodiment is:

[0036] (1) When the active loading device of the bearing fatigue testing machine needs to disassemble the hydraulic cylinder 3, the threaded connection between the two nuts 7 and the screw rod 6 is released, and then the limit plate 8 is pushed to the left to move, the threaded connection between the two bolts 16 and the connecting block 10 is released, and the bolts 16 are removed from the hydraulic cylinder 3 to facilitate the user to disassemble the hydraulic cylinder 3 from the device. The above steps are performed in reverse during installation, which is simple to operate, helps to shorten the disassembly and maintenance efficiency, and improves the practicality of the device.

[0037] (2) When the active loading device of the bearing fatigue testing machine is used, the bearing to be tested is placed on the placement plate 11, and then the hydraulic cylinder 3 is started to drive the placement plate 11 to move upward, and the two moving blocks 14 are driven to move in the opposite direction through the installation rod 15, driving the shock-absorbing spring 12 and the damper 13 to stretch. When the moving plate 11 moves up and down, the shock-absorbing spring 12 and the damper 13 are synchronously stretched and compressed, thereby making the placement plate more stable during movement, thereby improving the inspection quality of the bearing.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An active loading device for a bearing fatigue testing machine, comprising a mounting frame (1), a detection device (2) mounted on the top of the mounting frame (1) and a hydraulic cylinder (3), characterized in that: A disassembly component is installed on the installation frame (1), and a shock absorbing component is installed on the installation frame (1); The disassembly assembly comprises a mounting seat (4) fixedly mounted on the bottom of the inner wall of the mounting frame (1); a mounting plate (5) is fixedly mounted on the top of the mounting seat (4); two screw rods (6) are fixedly mounted on one side of the mounting plate (5); and nuts (7) are threadedly connected to the outer sides of the two screw rods (6); The top of the mounting seat (4) is slidably connected to a limit plate (8), the bottom of the limit plate (8) is fixedly mounted with a slider (9), and the output end of the hydraulic cylinder (3) is slidably connected to a connection block (10).

2. The active loading device of the bearing fatigue testing machine according to claim 1 is characterized in that: The shock absorbing assembly comprises a placement plate (11) fixedly mounted on the top of the connection block (10), two shock absorbing springs (12) are fixedly mounted on the top of the installation frame (1), and two dampers (13) are fixedly mounted on the top of the installation frame (1).

3. The active loading device of the bearing fatigue testing machine according to claim 2 is characterized in that: The output ends of the two dampers (13) are fixedly mounted with moving blocks (14), the tops of the two moving blocks (14) are hinged with mounting rods (15) hinged to the bottom of the placement plate (11), and both sides of the connection block (10) are threadedly connected with bolts (16).

4. The active loading device of a bearing fatigue testing machine according to claim 1, characterized in that: Two through holes are provided inside the limiting plate (8), and the screw rod (6) extends to the outside of the limiting plate (8) through the through holes.

5. The active loading device of a bearing fatigue testing machine according to claim 1, characterized in that: A first sliding groove is provided on the top of the mounting seat (4), and the sliding block (9) is slidably connected to the mounting seat (4) via the first sliding groove.

6. The active loading device of a bearing fatigue testing machine according to claim 1, characterized in that: A second sliding groove is provided on the front side of the connection block (10), and the output end of the hydraulic cylinder (3) is slidably connected to the connection block (10) via the second sliding groove.

7. The active loading device of a bearing fatigue testing machine according to claim 3, characterized in that: Threaded holes are provided on both sides of the connection block (10), and the bolts (16) are threadedly connected to the connection block (10) through the threaded holes.

8. The active loading device of a bearing fatigue testing machine according to claim 3, characterized in that: A third sliding groove is provided on the top of the installation frame (1), and the moving block (14) is slidably connected to the installation frame (1) via the third sliding groove.

Images