A bearing impact load testing device and method of use thereof

Abstract

The application relates to the technical field of bearing testing, in particular to an impact load testing device for bearings, which comprises a mounting frame, a fixing device arranged at the bottom of the mounting frame, and an impact device, wherein the impact device comprises an impact cylinder connected with the top of the mounting frame, the lower end of the impact cylinder is provided with a plurality of square notches, and an impact block is arranged in the impact cylinder; a limiting block is arranged in the impact cylinder, the inner side of the limiting block is arc-shaped, the inner side of the limiting block is arranged in an inclined mode, the top and the bottom of the limiting block are provided with concave-shaped sliding blocks, the concave-shaped sliding blocks are arranged in the square notches, the limiting block slides along the square notches, the limiting block is provided with a plurality of limiting blocks, when the limiting blocks slide to the innermost side, positioning grooves are formed between the limiting blocks, and the positioning grooves are used for positioning the impact block. The impact block can be kept in the center, and the effect that the impact block can be kept in the center is achieved.

Description

Technical Field

[0001] This application relates to the field of bearing testing technology, and in particular to a bearing impact load testing device and its usage method. Background Technology

[0002] During the use of bearings, they will be subjected to various loads. If the bearing cannot withstand these loads, it will fail, which will not only affect the operating efficiency of the equipment, but may also cause safety hazards. Therefore, before the bearing leaves the factory, it is necessary to conduct multiple load tests on the bearing to obtain accurate impact load data, thereby obtaining the data changes of the bearing before and after the impact, so as to determine whether the bearing meets the design requirements.

[0003] Existing impact load devices typically raise the impact block to a certain distance and then drop it from inside the impact cylinder, causing the impact block to strike the bearing below to complete the load test. Usually, the diameter of the impact block is smaller than the diameter of the impact cylinder, resulting in a gap between the impact block and the impact cylinder. If the impact block cannot be kept in the center, it will collide or rub against the inner wall of the impact cylinder during the fall, affecting the bearing impact load test data. Summary of the Invention

[0004] The purpose of this application is to provide a bearing impact load testing device and its usage method, which can solve the problem that the position of the impact block in the existing device cannot be kept in the center.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solution: an impact load testing device for bearings, comprising: a mounting frame; a fixing device, the fixing device being disposed at the bottom of the mounting frame and used to fix the bearing; an impact device, the impact device comprising: an impact cylinder, the impact cylinder being connected to the top of the mounting frame, the impact cylinder having openings at both ends, an observation window being provided at the front end of the impact cylinder, and multiple notches being provided at the lower end of the impact cylinder; an impact block, the impact block being disposed inside the impact cylinder and used to impact the bearing; a limit block being disposed inside the impact cylinder, the limit block having multiple limit blocks, the limit block being slidably connected to the notches, the inner side of the limit block being inclined, by pushing the limit block inward to form a positioning groove between the limit blocks, the impact block sliding down along the inner side of the limit block into the positioning groove for positioning, then the impact block being lifted, and then the limit block being pulled outward to make the inner side of the limit block retract into the notch for impact load testing.

[0006] In the above technical solution, this embodiment adjusts the distance between the fixing blocks based on the diameter and width of the bearing, and selects whether to add shims. After adjustment, the bearing is fixed, and the impact block is attracted by the electromagnetic component controlled by the lifting mechanism. Then, the blocking screw is removed, suspending the impact block in the air. The limiting block is then pushed into the impact cylinder, and the impact block is lowered, allowing it to slide between the limiting blocks for positioning. The impact block is located at the center of the impact cylinder, preventing it from contacting the inner wall of the impact cylinder. Then, the electromagnetic component re-attracts the impact block, preventing contact between the impact block and the impact cylinder due to gaps. In the gap, the impact block may be tilted, preventing the electromagnetic component from landing in the center of the impact block. This causes friction between the raised impact block and the inner wall of the impact cylinder, damaging both the impact block and the cylinder. Furthermore, during impact load testing, the friction between the impact block and the cylinder interferes with the impact block's descent speed, leading to inaccurate test data. Subsequently, a lifting mechanism raises the impact block to the predetermined impact height, pulls the limiting block outward to remove obstruction from the inside of the impact cylinder, and then releases the electromagnetic component, allowing the impact block to fall freely along the impact cylinder onto the outer ring of the bearing to complete the impact test. This solves the problem of the impact block not being centered in existing devices, achieving the effect of keeping the impact block centered.

[0007] Furthermore, according to an embodiment of this application, the mounting frame is a rectangular frame structure made of tubing, and the octagonal corners of the mounting frame are fixed with support plates.

[0008] Further, according to an embodiment of this application, the fixing device includes: The base plate is located at the bottom of the mounting frame and is fixedly connected to the mounting frame. The fixing blocks are fixed to the base plate. There are multiple fixing blocks, which are symmetrically arranged in the center of the mounting bracket. Each fixing block has a central hole and a gap between them for placing bearings. The mandrel is mounted on a fixed block, passes through a central hole, and is suspended from the bearing.

[0009] Furthermore, according to an embodiment of this application, the impact cylinder is provided with a scale, which is used to indicate the height of the impact block falling.

[0010] Furthermore, according to an embodiment of this application, a limit sensor is also provided on the impact cylinder, and the limit sensor is located at both ends of the observation window.

[0011] Furthermore, according to an embodiment of this application, the lower end of the impact cylinder is also provided with a blocking hole, and there are multiple blocking holes, which are used to block the impact block.

[0012] Furthermore, according to an embodiment of this application, the inner side of the limiting block is used to guide the impact block, so that the impact block can slide down to the bottom along the inner side of the limiting block for limiting, and the bottom of the limiting block has a protruding abutment block, which is used to abut the impact block.

[0013] Further, according to an embodiment of this application, the positioning device includes: Positioning rods are located on the outside of the impact cylinder. The two ends of the positioning rods are fixedly connected to the top and bottom of the mounting bracket. There are multiple positioning rods, which are used to support the impact cylinder. The positioning ring is set on the impact cylinder. The positioning ring is circular. The impact cylinder is inserted into the inner circle of the positioning ring. A connecting block is set on the outer ring of the positioning ring. The connecting block is connected to the positioning rod. There are multiple positioning rings. The positioning ring is used to fix the impact cylinder.

[0014] Furthermore, according to an embodiment of this application, a positioning block is provided on the positioning rod, and there are multiple positioning blocks, which are used to be fixedly connected with the connecting block.

[0015] To achieve the above objectives, this application also discloses a method for using a bearing impact load testing device, comprising the following steps: Before testing, adjust the fixing device according to the bearing to be tested. Adjust the distance between the fixing blocks according to the diameter and width of the bearing, and choose whether to add shims. After adjustment, place the bearing in the gap between the fixing blocks and align the center of the bearing with the center hole of the fixing block. Then fix the bearing by passing the mandrel through the bearing and the fixing block. Positioning is achieved by lowering the electromagnetic component via a lift, allowing it to fall onto the impact block. The electromagnetic component then attracts the impact block, and the blocking screw is removed, suspending the impact block in mid-air. The lift then raises the impact block, pushing the limit block into the impact cylinder. The impact block is then lowered, sliding between the limit blocks for positioning. The impact block is positioned at the center of the impact cylinder, avoiding contact with the inner wall of the impact cylinder. Lift, release the electromagnetic component, and lift it a certain distance so that the electromagnetic component is kept in the center of the impact cylinder. Then, lower it to the center of the impact block and attract the impact block. Then, lift the impact block to the predetermined impact height using a lift. The impact is applied by pulling the limiting block outwards to remove any obstruction inside the impact cylinder. Then, the electromagnetic assembly is released, allowing the impact block to fall freely along the impact cylinder onto the outer ring of the bearing to complete the impact test.

[0016] Compared with the prior art, this application has the following beneficial effects: This application adopts a bearing impact load testing device and its usage method. By adjusting the distance between the middle of the fixing blocks according to the diameter and width of the bearing, and selecting whether to add shims, the bearing is fixed after adjustment. The electromagnetic component controlled by the lifting mechanism attracts the impact block. Then, the blocking screw is removed, so that the impact block is suspended in the air. Then, the limiting block is pushed into the impact cylinder, and then the impact block is lowered, so that the impact block slides between the limiting blocks for positioning. The impact block is located in the center of the impact cylinder, so that the impact block avoids contact with the inner wall of the impact cylinder. Then, the electromagnetic component re-attracts the impact block. To prevent the impact block from being tilted due to a gap between it and the impact cylinder, which could cause the electromagnetic component to not fall in the center of the impact block and result in friction between the raised impact block and the inner wall of the impact cylinder, damaging both the impact block and the cylinder, and interfering with the falling speed of the impact block during impact load testing, leading to inaccurate test data, a lifting mechanism is used to raise the impact block to the predetermined impact height. The limiting block is then pulled outwards to remove any obstruction inside the impact cylinder. Finally, the electromagnetic component is released, allowing the impact block to fall freely along the impact cylinder onto the outer ring of the bearing to complete the impact test. This solves the problem of the impact block not being centered in existing devices, achieving the effect of keeping the impact block centered. Attached Figure Description

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of an impact load testing device for a bearing according to an embodiment.

[0019] Figure 2 This is a schematic diagram of the fixing device and impact device in the embodiment.

[0020] Figure 3 This is a top view of the fixing device in the embodiment.

[0021] Figure 4 This is a schematic diagram of the adjustment of the fixing device in the embodiment.

[0022] Figure 5 This is a schematic diagram of the limiting block and impact block in the embodiment.

[0023] Figure 6 This is a schematic diagram of the limiting block and impact block structure in the embodiment.

[0024] Figure 7 This is a schematic diagram of the electromagnetic component structure in an embodiment.

[0025] In the attached diagram: 1. Mounting bracket, 11. Baffle, 2. Fixing device, 21. Base plate, 22. Fixing block, 23. Mandrel, 24. Pad block, 3. Impact device, 31. Impact cylinder, 32. Limiting block, 321. Stopping block, 33. Electromagnetic assembly, 331. Electromagnet, 332. Positioning frame, 333. Indicator plate, 334. Lifting frame, 34. Impact block, 35. Lifting platform, 36. Blocking screw, 37. Limit sensor, 4. Positioning device, 41. Positioning rod, 42. Positioning ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," 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 the invention 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 the invention. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other. Example 1

[0030] like Figure 1-7 As shown, this application discloses a bearing impact load testing device, including: a mounting frame 11; a fixing device 2, which is disposed at the bottom of the mounting frame 11 and is used to fix the bearing; an impact device 3, which includes: an impact cylinder 31, which is connected to the top of the mounting frame 11, with openings at both ends, an observation window at the front end of the impact cylinder 31, and multiple notches at the lower end of the impact cylinder 31; an impact block 34, which is disposed inside the impact cylinder 31 and is used to impact the bearing; a limiting block 32 is disposed inside the impact cylinder 31, with multiple limiting blocks 32, which are slidably connected to the notches, and the inner side of the limiting block 32 is inclined. By pushing the limiting block 32 inward, a positioning groove is formed between the limiting blocks 32, and the impact block 34 slides down along the inner side of the limiting block 32 into the positioning groove for positioning. Then, the impact block 34 is lifted up, and then the limiting block 32 is pulled outward so that the inner side of the limiting block 32 is hidden in the notch for impact load testing.

[0031] Specifically, the mounting frame 1 is a rectangular frame structure made of tubing. The octagonal corners of the mounting frame 1 are fixed with support plates. The bottom of the mounting frame 1 is equipped with multiple baffles 11 to block any possible flying bearing fragments and prevent danger to surrounding personnel.

[0032] Specifically, the fixing device 2 includes: a base plate 21, which is disposed at the bottom of the mounting frame 1 and fixedly connected to the mounting frame 1; fixing blocks 22, which are fixed on the base plate 21, and there are multiple fixing blocks 22 symmetrically arranged at the center of the mounting frame 1; each fixing block 22 has a central hole and a spacing between them for placing bearings; and a spindle 23, which is disposed on the fixing blocks 22, passes through the central hole, and the bearing is suspended on the spindle 23. Multiple fixing holes are provided on both sides of the base plate 21 for fixing to the mounting frame 1 with screws. Multiple adjustment holes are located in the middle of the base plate 21, which are connected to the fixing blocks 22. There are two fixing blocks 22. The fixing blocks 22 are convex in shape and have four through holes on both sides. They are fixed to the base plate 21 with screws through the through holes. The fixing blocks 22 can move outwards. By aligning the through holes with the adjustment holes of the base plate 21, bearings of different widths can be placed for impact load testing. A pad block 24 can be placed under the fixing block 22. The pad block 24 is the same size as the bottom of the fixing block 22 and has the same through holes. Depending on the different diameters of the bearings, different numbers of pad blocks 24 are added to the bottom of the fixing block 22 and longer screws are used for fixing. Thus, the fixing device 2 can fix gears of different diameters, so that the bearings and impact blocks 34 face each other perpendicularly, which facilitates impact load testing and achieves the effect of keeping the position of the impact block in the center.

[0033] Specifically, the impact cylinder 31 is equipped with graduations to indicate the height from which the impact block 34 falls. Limit sensors 37 are also installed on the impact cylinder 31, located at both ends of the observation window. Multiple blocking holes are provided at the lower end of the impact cylinder 31 to block the impact block 34. The distance between the bottom of the impact cylinder 31 and the fixing device 2 is less than the length of the impact block 34. When not in use, to ensure the accuracy of the limit block 32, it needs to be inspected and maintained. When disassembling the limit block 32, a blocking screw 36 is inserted into the blocking hole to hold the impact block 34 in place, preventing it from falling. The inner diameter of the impact cylinder 31 is larger than the diameter of the impact block 34, and the centers of the impact cylinder 31 and the impact block 34 are the same. The impact cylinder 31 guides and protects the impact block 34, preventing it from popping out after impact and causing danger.

[0034] Specifically, the inner side of the limiting block 32 guides the impact block 34, allowing it to slide down to the bottom for positioning. The bottom of the limiting block 32 has a protruding abutment block 321 to block the impact block 34. There are three limiting blocks 32. When all the limiting blocks 32 are pushed into the impact cylinder 31, a central notch is formed on the inner side of the limiting block 32, concentric with the impact cylinder 31. The size of the notch is the same as that of the impact block 34, allowing the impact block 34 to be placed stably and accurately locate the center of the impact cylinder 31. This ensures the electromagnetic component 33 falls in the center of the impact block 34, maintaining the center of gravity of the falling impact block 34 and preventing it from contacting the inner wall of the impact cylinder 31 during descent. This would hinder the falling speed of the impact block 34 and lead to inaccurate test results for the impact load. This achieves the effect of accurately determining the center position of the impact block and avoiding friction with the impact cylinder. In use, the impact block 34 is first lifted by the electromagnetic component 33, then the limiting block 32 is pushed into the impact cylinder 31, then the impact block 34 is lowered and positioned in the positioning groove. Then the impact block 34 is lifted again and the limiting block 32 is slid outward so that the limiting block 32 is hidden in the impact cylinder 31. Then the impact load test is performed.

[0035] Specifically, the impact device also includes an electromagnetic component and a lifting mechanism. The electromagnetic component is positioned above the impact block and is used to hold the impact block in place. The lifting mechanism is mounted on the mounting frame and is connected to the electromagnetic component. The lifting mechanism is used to control the lifting and lowering of the electromagnetic component. The electromagnetic component 33 includes an electromagnet 331, a positioning frame 332, an indicator plate 333, and a hoisting frame 334. The indicator plate 333 is annular, and its diameter is the same as that of the inner wall of the impact cylinder 31. The indicator plate 333 can slide along the inside of the impact cylinder 31, which makes it easier for the electromagnet 331 to find the center of the impact cylinder 31 and prevents the impact block 34 from swinging inside the impact cylinder 31 and contacting the inner wall of the impact cylinder 31, thereby reducing the falling speed of the impact block 34 and affecting the impact load test of the bearing. The indicator plate 333 has an annular ring stacked in the middle and a thread on its outer side, which is connected to the lifting frame 334 through the thread. A protrusion is provided in front of the indicator plate 333. The protrusion extends from the observation window of the impact cylinder 31 and extends to both sides. The protrusion contacts the scale on the outside of the impact cylinder 31 to indicate the lifting height of the impact block 34. The positioning frame 332 consists of two parts. The lower end of the positioning frame 332 is a cylinder, which is hollow and has openings at the bottom and around the sides. The cylinder is grid-like and has a threaded rod at the top. The upper end of the positioning frame 332 is a hemisphere, and the lower end of the hemisphere has a connecting post with a threaded hole at the bottom. The cylinder and the hemisphere are connected together by the threaded structure. The positioning frame 332 passes through the circular hole between the indicator plates 333, with the hemisphere on top and the cylinder on the bottom. The hoisting frame 334 is hollow and consists of a frame body and a cover, which are connected by a threaded structure. The bottom of the hoisting frame 334 has a threaded hole that connects to the top of the indicator plate 333. The top of the hoisting frame 334 has hoisting holes distributed around its top and sides. The hoisting frame 334 is secured by a lift 35 to control its lifting and lowering. The bottom of the hoisting frame 334 has a through hole, and above the through hole is a hemispherical groove for placing the positioning frame 332. The hemisphere of the positioning frame 332 is inserted into the hemispherical groove, allowing the positioning frame 332 to rotate within the hemispherical groove.During use, the contact between the indicator plate 333 and the inner wall of the impact cylinder 31 ensures that the electromagnetic component 33 rises and falls in the same circle. However, prolonged back-and-forth movement can easily cause wear on the indicator plate 333 and the impact cylinder 31. At this time, the indicator plate 333 cannot remain stable and may tilt, causing the impact block 34 to not stay in the center and to rub or collide with the surrounding impact cylinders 31, thus hindering the falling speed of the impact block 34 and resulting in inaccurate impact load test results. In this case, the hemispherical structure between the positioning frame 332 and the hoisting frame 334 can ensure that the positioning frame 332 can automatically adjust its position under the gravity of the impact block 34, keeping the impact block 34 in the center position, which is convenient for impact load testing. This achieves the effect of avoiding collision or friction between the impact block and the inner wall of the impact cylinder when it falls.

[0036] Specifically, the positioning device 4 includes: a positioning rod 41, which is disposed on the outside of the impact cylinder 31. Both ends of the positioning rod 41 are fixedly connected to the top and bottom of the mounting bracket 1. Multiple positioning rods 41 are used to support the impact cylinder 31. A positioning ring 42 is disposed on the impact cylinder 31 and is annular in shape. The impact cylinder 31 is inserted into the inner circle of the positioning ring 42. A connecting block is disposed on the outer ring of the positioning ring 42, and the connecting block is connected to the positioning rod 41. Multiple positioning rings 42 are used to fix the impact cylinder 31. Multiple positioning blocks are disposed on the positioning rod 41 and are used to fixably connect with the connecting blocks.

[0037] Specifically, this application adjusts the distance between the fixing blocks 22 according to the diameter and width of the bearing, and selects whether to add shims 24. After adjustment, the bearing is fixed, and the electromagnetic component 33 controlled by the lifting mechanism 35 attracts the impact block 34. Then, the blocking screw 36 is removed, so that the impact block 34 is suspended in the air. Then, the limiting block 32 is pushed into the impact cylinder 31, and then the impact block 34 is lowered, so that the impact block 34 slides between the limiting blocks 32 for positioning. The impact block 34 is located in the center of the impact cylinder 31, so that the impact block 34 does not contact the inner wall of the impact cylinder 31. Then, the electromagnetic component 33 re-attracts the impact block 34 to prevent the impact block 34 from contacting the inner wall of the impact cylinder 31 due to the distance between the impact block 34 and the impact cylinder 31. Due to the gap, the impact block 34 may be tilted, preventing the electromagnetic component 33 from landing at the center of the impact block 34. This causes friction between the raised impact block 34 and the inner wall of the impact cylinder 31, damaging both. Furthermore, during impact load testing, the friction between the impact block 34 and the impact cylinder 31 interferes with the falling speed of the impact block 34, leading to inaccurate test data. Subsequently, the lifting platform 35 raises the impact block 34 to the predetermined impact height, pulls the limiting block 32 outward to remove obstruction from the inside of the impact cylinder 31, and then releases the electromagnetic component 33, allowing the impact block 34 to fall freely along the impact cylinder 31 onto the outer ring of the bearing to complete the impact test. This solves the problem of the impact block not being centered in existing devices, achieving the effect of keeping the impact block centered. Example 2

[0038] This application also discloses a method for using a bearing impact load testing device, including the following steps: Before testing, adjust the fixing device 2 according to the bearing to be tested. Adjust the distance between the fixing blocks 22 according to the diameter and width of the bearing, and choose whether to add shims 24. After adjustment, place the bearing in the gap between the fixing blocks 22 and align the center of the bearing with the center hole of the fixing block 22. Then fix the bearing by passing the mandrel 23 through the bearing and the fixing block 22. Positioning is achieved by lowering the electromagnetic component 33 via the lifting mechanism 35, causing the electromagnetic component 33 to fall onto the impact block 34. The electromagnetic component 33 then attracts the impact block 34. The blocking screw 36 is then removed, suspending the impact block 34 in mid-air. The lifting mechanism 35 then raises the impact block 34, pushing the limiting block 32 into the impact cylinder 31. The impact block 34 is then lowered, sliding between the limiting blocks 32 for positioning. The impact block 34 is located at the center of the impact cylinder 31, avoiding contact with the inner wall of the impact cylinder 31. Lift, release electromagnetic component 33, and lift it a certain distance so that electromagnetic component 33 is kept in the center of impact cylinder 31. Then, it falls to the center of impact block 34 and attracts impact block 34. Then, the elevator 35 lifts impact block 34 to the predetermined impact height. The impact is applied, pulling the limiting block 32 outward so that there is no more obstruction inside the impact cylinder 31. Then the electromagnetic component 33 is released, allowing the impact block 34 to fall freely along the impact cylinder 31 onto the outer ring of the bearing to complete the impact test.

[0039] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A bearing impact load testing device, comprising: Mounting rack; A fixing device is disposed at the bottom of the mounting frame and is used to fix the bearing. Impact device, the impact device comprising: An impact cylinder is connected to the top of the mounting bracket. The impact cylinder has openings at both ends, an observation window is provided at the front end of the impact cylinder, and multiple notches are provided at the lower end of the impact cylinder. An impact block is disposed inside the impact cylinder and is used to impact the bearing. The feature is that a limiting block is provided inside the impact cylinder, and there are multiple limiting blocks. The limiting blocks are slidably connected to the notch. The inner side of the limiting block is inclined. By pushing the limiting block inward, a positioning groove is formed between the limiting blocks. The impact block slides down along the inner side of the limiting block into the positioning groove for positioning. Then, the impact block is lifted up, and then the limiting block is pulled outward so that the inner side of the limiting block is hidden in the notch for impact load testing.

2. The bearing impact load testing device according to claim 1, characterized in that, The mounting bracket is a rectangular frame structure made of tubing, and the octagonal corners of the mounting bracket are fixed with support plates.

3. The bearing impact load testing device according to claim 1, characterized in that, The fixing device includes: A base plate is disposed at the bottom of the mounting frame and is fixedly connected to the mounting frame; A fixing block is fixed to the base plate. There are multiple fixing blocks, which are symmetrically arranged at the center of the mounting frame. Each fixing block has a central hole and a spacing between them for placing the bearing. A mandrel is mounted on the fixed block, passes through the central hole, and is suspended from the mandrel.

4. The bearing impact load testing device according to claim 1, characterized in that, The impact cylinder is provided with a scale, which is used to indicate the height from which the impact block falls.

5. The bearing impact load testing device according to claim 1, characterized in that, The impact cylinder is also equipped with limit sensors, which are located at both ends of the observation window.

6. The bearing impact load testing device according to claim 1, characterized in that, The lower end of the impact cylinder is also provided with a blocking hole, and there are multiple blocking holes, which are used to block the impact block.

7. The bearing impact load testing device according to claim 1, characterized in that, The inner side of the limiting block is used to guide the impact block, so that the impact block can slide down to the bottom along the inner side of the limiting block for limiting. The bottom of the limiting block has a protruding abutment block, which is used to abut the impact block.

8. The bearing impact load testing device according to claim 1, characterized in that, The impact device is further provided with a positioning device, the positioning device comprising: A positioning rod is disposed on the outside of the impact cylinder, and both ends of the positioning rod are fixedly connected to the top and bottom of the mounting bracket. There are multiple positioning rods, and the positioning rods are used to support the impact cylinder. A positioning ring sleeve is provided on the impact cylinder. The positioning ring sleeve is circular. The impact cylinder is inserted into the inner circle of the positioning ring sleeve. A connecting block is provided on the outer ring of the positioning ring sleeve. The connecting block is connected to the positioning rod. There are multiple positioning ring sleeves. The positioning ring sleeves are used to fix the impact cylinder.

9. The bearing impact load testing device according to claim 8, characterized in that, The positioning rod is provided with a positioning block, and there are multiple positioning blocks. The positioning blocks are used to be fixedly connected to the connecting block.

10. A method of using a bearing impact load testing device, characterized in that, An impact load testing device for a bearing according to any one of claims 1-9, wherein the method of using the impact load testing device for a bearing includes: Before testing, the fixing device is adjusted according to the bearing to be tested. The distance between the fixing blocks is adjusted according to the diameter and width of the bearing, and whether to add shims is selected. After adjustment, the bearing is placed in the gap between the fixing blocks, and the center of the bearing is aligned with the center hole of the fixing block. Then, the bearing is fixed by passing a mandrel through the bearing and the fixing block. Positioning is achieved by lowering the electromagnetic component controlled by the elevator, allowing the electromagnetic component to land on the impact block and hold it in place. Then, the blocking screw is removed, suspending the impact block in mid-air. The elevator then raises the impact block, pushing the limiting block into the impact cylinder. The impact block is then lowered, sliding between the limiting blocks for positioning. The impact block is located at the center of the impact cylinder, avoiding contact with the inner wall of the impact cylinder. The electromagnetic component is lifted, released, and raised a certain distance so that it is held in the center of the impact cylinder. Then it falls to the center of the impact block and attracts the impact block. The elevator then lifts the impact block to the predetermined impact height. The impact is applied, pulling the limiting block outward so that there is no more obstruction inside the impact cylinder. Then the electromagnetic component is released, allowing the impact block to fall freely along the impact cylinder onto the outer ring of the bearing to complete the impact test.

Images