Running-in test device for roller bearing

Abstract

The invention relates to the technical field of bearing testing, and discloses a roller bearing running-in testing device which comprises a base, a cabinet body is fixedly installed at the top of the base, four circular plates are fixedly installed in the cabinet body at equal intervals, large bearings are fixedly installed in the middles of the circular plates, cylinders are fixedly installed in the middles of the large bearings, and the rollers are fixedly installed in the cylinders. A fixed clamping mechanism is mounted at the top of each circular plate, a fixed clamping rotating mechanism is mounted on the surface of each cylinder, an extrusion part is mounted at the top in the cabinet body, a cavity is formed in the base, a first motor is mounted in the cavity, and the output end of the first motor is fixedly connected with the bottom of the cylinder on the bottommost circular plate; a second motor is mounted on the surface of the cabinet body; the running-in test device for the roller bearing is provided with a bearing batch test structure, and synchronous running-in test operation can be carried out on a plurality of bearings at one time, so that a large amount of reliable test data can be quickly and effectively obtained, and the running-in test efficiency and speed of the roller bearing are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bearing testing, and specifically relates to a running-in test device for roller bearings. Background Art

[0002] A roller bearing is a mechanical component that uses rolling elements (rollers) to transmit loads and is widely used in industrial machinery, vehicles and other equipment; it consists of an inner ring, an outer ring, rollers and a cage, and has the characteristics of large load-bearing capacity, small frictional resistance and long service life; roller bearings are suitable for bearing large loads, radial and axial loads, and at the same time have good wear resistance and impact resistance; and the running-in test of roller bearings is an important link to ensure their normal operation and extend their service life. The test usually includes preloading, gradually increasing the load and speed, observing the vibration, temperature rise and noise changes of the bearing during operation, and judging whether the fit between the rollers and the raceways is good, and whether there is abnormal friction or abnormal vibration by monitoring these parameters; during the running-in process, maintain a good lubrication state to ensure uniform distribution of lubricating oil or grease; at the same time, record the test data, analyze the performance indicators of the bearing, discover potential defects or quality problems. A reasonable running-in test helps to improve the working stability and reliability of the bearing and ensure its expected service life and performance in actual operation.

[0003] When the current roller bearing running-in test equipment is in use, it can only test one bearing at a time. The number of bearings tested by this kind of equipment each time is small, and a large amount of reliable test data cannot be obtained quickly and effectively, thus reducing the efficiency of the roller bearing running-in test. Therefore, in view of the above problems, improvements are now needed. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: A running-in test device for roller bearings, including a base, on the top of the base is fixedly installed a cabinet body, inside the cabinet body are fixedly installed four circular plates at equal intervals, in the middle of each circular plate is fixedly installed a large bearing, in the middle of each large bearing is fixedly installed a cylinder penetrating the circular plate, on the top of each circular plate is installed a fixed clamping mechanism for externally fixing the roller bearing, on the surface of the cylinder above the circular plate is installed a fixed clamping and rotating mechanism for internally fixing the roller bearing, at the top inside the cabinet body is installed a pressing component coaxial with the cylinder, inside the base is provided with a cavity, inside the cavity is installed a first motor, the output end of the first motor extends into the cabinet body, and the output end of the first motor is fixedly connected to the bottom of the cylinder on the lowermost circular plate, on the surface of the cabinet body is installed a second motor drivingly connected to all the fixed clamping mechanisms.

[0005] Preferably, the fixed clamping mechanism includes three straight sliding grooves arranged in an annular shape at equal distances on the top of the circular plate, and a ring groove connected to the three straight sliding grooves on the top of all the circular plates is arranged in the middle part, an inverted T-shaped slider is slidably installed between the ring groove and the straight sliding groove, an outer clamping block located above all the circular plates is fixedly installed on the top of the inverted T-shaped slider, and a first rubber clamping block is fixedly installed on one side of the outer clamping block.

[0006] Preferably, a rotating ring is installed inside the ring groove, three arc grooves are equidistantly arranged in an annular shape on the top of the rotating ring, and a toggle pin inserted in the arc groove is fixedly installed at the bottom of the inverted T-shaped slider.

[0007] Preferably, a bevel gear ring is fixedly installed on the circumferential surface of the rotating circle, and an adjusting shaft is rotatably installed on the circumferential surface of the circular plate. One end of the adjusting shaft extends to the inside of the ring groove and is fixedly installed with a bevel gear meshing with the bevel gear ring. The other ends of all the adjusting shafts extend to the outside of the cabinet and are fixedly installed with a worm gear. A worm connected to the output end of the second motor is rotatably installed on one side of the cabinet, and the worm is meshing with all the worm gears.

[0008] Preferably, the extrusion component comprises an electric telescopic rod installed on the top of the interior of the cabinet, a small bearing is installed on the telescopic end of the electric telescopic rod, and a cylindrical extrusion rod is fixedly installed in the middle of the small bearing.

[0009] Preferably, the fixed clamping rotating mechanism includes a triangular vertical groove opened in the middle of the circular plate, a triangular slider is slidably installed inside the triangular vertical groove, three vertical grooves connected to the triangular vertical groove are opened in an annular manner with equal distances on the surface of the circular plate, and the middle parts of the three sides of the triangular slider are fixedly connected with connecting blocks extending into the three vertical grooves.

[0010] Preferably, the ends of the connecting blocks located inside the vertical grooves are rotatably connected to extrusion rods, the bottoms of the vertical grooves are rotatably installed with connecting rods, an inner clamping block is rotatably connected between the extrusion rods and the connecting rods located inside the same vertical groove, and a second rubber clamping block is fixedly installed on one side of the inner clamping block.

[0011] Preferably, a first through square groove is opened in the middle of the upper part of the cylinder, a second through square groove is opened in the middle of the lower part of the cylinder, the triangular vertical groove is located between the first through square groove and the second through square groove, a square long pin is movably inserted between the first through square groove and the second through square groove, the square long pin passes through the middle part of the triangular slider and is fixedly connected to the triangular slider, and the surface of the square long pin located inside the triangular vertical groove is sleeved with a reset spring located at the bottom of the triangular slider.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The roller bearing running-in test device has a bearing batch test structure, which can perform synchronous running-in test operations on multiple bearings at one time, thereby quickly and effectively obtaining a large amount of reliable test data, thereby improving the efficiency and speed of the roller bearing running-in test; At the same time, the test device has an effective external fixed structure and an internal fixed rotating structure. The external fixed structure can effectively and stably fix the outer ring of the roller bearing under test, while the internal fixed rotating structure can effectively fix and rotate the inner ring of the roller bearing under test, thereby effectively ensuring the stability and reliability of the running-in test; In addition, the test device has a simple structure design, is easy to use, and has stable and reliable operation. Its performance can meet the use requirements of roller bearing running-in test; (2) Place a pair of roller bearings on the surface of the top cylinder of the four circular plates respectively, and then start the second motor to rotate the worm. The rotation of the worm will drive all the worm wheels to drive all the adjusting shafts and bevel gears to rotate. The rotation of the bevel gear will drive the bevel gear ring to drive the rotating ring to rotate. The rotation of the rotating ring will drive the three arc grooves on it to rotate. The rotation of the three arc grooves will cause the inverted T-shaped slider to move toward the outer ring of the roller bearing in the inner part of the straight groove through the three straight grooves and the toggle pin, so that the three outer clamping blocks on the surface of the circular plate drive the first rubber clamping block thereon to move toward the outer ring of the roller bearing and clamp the outer ring of the roller bearing; (3) After the three outer clamping blocks clamp and fix the outer ring of the roller bearing through the first rubber clamping block thereon, the electric telescopic rod is started to extend and the cylindrical extrusion rod is driven to move downward through the small bearing. The cylindrical extrusion rod moves downward and is inserted into the first through-through square groove on the uppermost cylinder, thereby squeezing and moving the square long pin in the first through-through square groove downward. The downward movement of the square long pin drives the triangular slider and the connecting block to move downward and compress the reset spring. The downward movement of the connecting block will drive the inner clamping block and the second rubber clamping block to move downward in an arc track through the extrusion rod and the connecting rod, and finally the inner ring of the roller bearing will be clamped and fixed through the elastic deformation of the second rubber clamping block; and as the electric telescopic rod continues to extend, the cylindrical extrusion rod will continue to squeeze the uppermost square long pin to move downward, so that the uppermost square long pin is inserted into the first through-through square groove at the lower part and squeezes the square long pin inside to move downward, and the downward movement of the square long pin will cause the same adjustment process as mentioned above and clamp the inner ring of another roller bearing again; similarly, the lower square long pin will be adjusted in the same way to clamp and fix the inner rings of the roller bearings placed on the four circular plates; The thickness of the second rubber clamping block inside the cabinet body increases sequentially from bottom to top, so as to satisfy that the upper second rubber clamping block first contacts the inside of the roller bearing and deforms to clamp and fix the roller bearing, and at the same time enable multiple square long pins to effectively move down for adjustment; After all the inner rings of the roller bearings are clamped and fixed, the cylinder on the bottommost circular plate is rotated by starting the first motor. The rotation of this cylinder can drive all the cylinders to rotate because the square long pin is inserted into the inside of the first through square groove. The rotation of the cylinder can drive the inner ring of the roller bearing to rotate through the triangular slider, connecting block, extrusion rod, connecting rod, inner clamping block and the second rubber clamping block, so as to realize the synchronous running-in test operation of the four roller bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings are used to provide further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0014] In the drawings: Figure 1 is a schematic cross-sectional structure view of the device for running-in test of roller bearings of the present invention; Figure 2 is for the present invention Figure 1 partial structure schematic Figure 1 ; Figure 3 is a schematic top view structure of the circular plate of the present invention; Figure 4 is for the present invention Figure 2 partial structure schematic diagram; Figure 5 is a schematic top view structure of the rotating ring of the present invention; Figure 6 is for the present invention Figure 1 partial clear structure schematic Figure 2 ; Figure 7 is for the present invention Figure 1 partial clear structure schematic Figure 3 ; Figure 8 is for the present invention Figure 7 partial structure schematic diagram; In the figure: 1, base; 2, cabinet; 3, round plate; 4, large bearing; 5, cylinder; 6, fixed clamping mechanism; 7, fixed clamping rotating mechanism; 8, extrusion component; 9, cavity; 10, first motor; 11, second motor; 12, straight slide groove; 13, ring groove; 14, inverted T-shaped slider; 15, outer clamping block; 16, first rubber clamping block; 17, rotating circle; 18, arc groove; 19, toggle pin; 20, bevel gear ring; 21, Adjusting shaft; 22, bevel gear; 23, worm wheel; 24, worm; 25, triangular vertical groove; 26, vertical groove; 27, triangular slider; 28, connecting block; 29, extrusion rod; 30, connecting rod; 31, inner clamping block; 32, second rubber clamping block; 33, first through square groove; 34, second through square groove; 35, square long pin; 36, reset spring; 37, electric telescopic rod; 38, small bearing; 39, cylindrical extrusion rod. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] Embodiment 1, by Figures 1 to 8 The present invention comprises a base 1, a cabinet body 2 is fixedly installed on the top of the base 1, a cabinet door is installed on one side of the cabinet body 2 through a hinge, and the cabinet door is not drawn in the attached drawings, four circular plates 3 are fixedly installed at equal distances inside the cabinet body 2, the axes of all the circular plates 3 are located on the same vertical axis, a large bearing 4 is fixedly installed in the middle of the circular plate 3, a cylinder 5 penetrating the circular plate 3 is fixedly installed in the middle of the large bearing 4, a fixing clamping mechanism 6 for externally fixing the roller bearing is installed on the top of the circular plate 3, and a roller bearing is installed on the surface of the cylinder 5 located above the circular plate 3 A fixed clamping rotating mechanism 7 is provided for internal fixing of the bearing, an extrusion component 8 coaxial with the cylinder 5 is installed on the top of the cabinet 2, and multiple cylinders 5 can be connected and driven to rotate through the extrusion component 8. A cavity 9 is opened inside the base 1, and a first motor 10 is installed inside the cavity 9. The output end of the first motor 10 extends to the inside of the cabinet 2, and the output end of the first motor 10 is fixedly connected to the bottom of the cylinder 5 on the bottom circular plate 3. A second motor 11 transmission-connected to all the fixed clamping mechanisms 6 is installed on the surface of the cabinet 2.

[0017] Embodiment 2, on the basis of embodiment 1, the fixed clamping mechanism 6 includes three straight slide grooves 12 annularly equidistantly opened on the top of the circular plate 3, and a ring groove 13 connected to the three straight slide grooves 12 on the top of all the circular plates 3 is opened in the middle part, and an inverted T-shaped slider 14 is slidably installed between the ring groove 13 and the straight slide groove 12, and an outer clamping block 15 located above all the circular plates 3 is fixedly installed on the top of the inverted T-shaped slider 14, and a first rubber clamping block 16 is fixedly installed on one side of the outer clamping block 15, and a rotating ring 17 is installed inside the ring groove 13, and three arc grooves 18 are annularly equidistantly opened on the top of the rotating ring 17, and a toggle pin 19 inserted in the arc groove 18 is fixedly installed on the bottom of the inverted T-shaped slider 14, so that the three outer clamping blocks 15 on the top of the circular plate 3 can be effectively adjusted to clamp and fix the surface of the roller bearing.

[0018] A bevel gear ring 20 is fixedly installed on the circumferential surface of the rotating circle 17, and an adjusting shaft 21 is rotatably installed on the circumferential surface of the circular plate 3. One end of the adjusting shaft 21 extends to the inside of the ring groove 13 and is fixedly installed with a bevel gear 22 meshing with the bevel gear ring 20. The other ends of all the adjusting shafts 21 extend to the outside of the cabinet 2 and are fixedly installed with a worm gear 23. A worm 24 connected to the output end of the second motor 11 is rotatably installed on one side of the cabinet 2. The worm 24 is meshingly connected with all the worm gears 23, so that transmission adjustment can be effectively performed.

[0019] Specifically, the roller bearings are respectively sleeved on the surface of the cylinder 5 at the top of the four circular plates 3, and then the second motor 11 is started to rotate the worm 24. The rotation of the worm 24 will transmit the power to all the worm wheels 23 and drive all the adjusting shafts 21 and the bevel gear 22 to rotate. The rotation of the bevel gear 22 will transmit the power to the bevel gear ring 20 and drive the rotating circle 17 to rotate. The rotation of the rotating circle 17 will drive the three arc grooves 18 thereon to rotate. The rotation of the three arc grooves 18 will cause the inverted T-shaped slider 14 to move toward the outer ring of the roller bearing inside the straight groove 12 through the three straight grooves 12 and the toggle pin 19, so that the three outer clamping blocks 15 on the surface of the circular plate 3 drive the first rubber clamping block 16 thereon to move toward the outer ring of the roller bearing and clamp and fix the outer ring of the roller bearing.

[0020] Embodiment 3, on the basis of Embodiment 1, the extrusion member 8 includes an electric telescopic rod 37 installed at the top inside the cabinet body 2. A small bearing 38 is installed at the telescopic end of the electric telescopic rod 37, and a cylindrical extrusion insertion rod 39 is fixedly installed in the middle of the small bearing 38; the fixed clamping and rotating mechanism 7 includes triangular vertical grooves 25 opened in the middle of the circular plate 3. Triangular sliders 27 are slidably installed inside the triangular vertical grooves 25. Three vertical grooves 26 communicating with the triangular vertical grooves 25 are annularly and equidistantly opened on the surface of the circular plate 3. Connecting blocks 28 extending into the three vertical grooves 26 are fixedly connected to the middle parts of the three sides of the triangular slider 27; the ends of the connecting blocks 28 located inside the vertical grooves 26 are rotatably connected to extrusion rods 29. Connecting rods 30 are rotatably installed at the bottoms of the vertical grooves 26. An inner clamping block 31 is rotatably connected between the extrusion rod 29 and the connecting rod 30 located inside the same vertical groove 26. Second rubber clamping blocks 32 are fixedly installed on one side of the inner clamping block 31.

[0021] A first through square groove 33 is opened in the middle of the upper part of the cylinder 5. The diameter of the first through square groove 33 is larger than the diameter of the cylindrical extrusion insertion rod 39. A second through square groove 34 is opened in the middle of the lower part of the cylinder 5. The triangular vertical groove 25 is located between the first through square groove 33 and the second through square groove 34. A square long pin 35 is movably inserted between the first through square groove 33 and the second through square groove 34. The square long pin 35 passes through the middle of the triangular slider 27 and is fixedly connected to the triangular slider 27. Return springs 36 located at the bottoms of the triangular sliders 27 are sleeved on the surfaces of the square long pins 35 located inside the triangular vertical grooves 25. The length of the cylindrical extrusion insertion rod 39 can meet the downward movement of the four square long pins 35, so as to effectively clamp and fix the inner ring of the roller bearing and drive the inner ring of the roller bearing to rotate for the running-in test operation; the square long pin 35 on the bottommost circular plate 3 does not pass through the second through square groove 34, as shown in the attached Figure 8 figure.

[0022] Specifically, when the three outer clamping blocks 15 clamp and fix the outer ring of the roller bearing through the first rubber clamping blocks 16 thereon, the electric telescopic rod 37 is started to extend, and the cylindrical extrusion insertion rod 39 is driven to move downward through the small bearing 38. The downward movement of the cylindrical extrusion insertion rod 39 will insert into the first through square groove 33 on the uppermost cylinder 5, thereby squeezing and moving downward the square long pin 35 inside the first through square groove 33. The downward movement of the square long pin 35 will drive the triangular slider 27 and the connecting block 28 to move downward and compress the return spring 36; The downward movement of the connecting block 28 will drive the inner clamping block 31 and the second rubber clamping block 32 to move downward along an arc through the extrusion rod 29 and the connecting rod 30. Finally, the inner ring of the roller bearing is clamped and fixed through the elastic deformation of the second rubber clamping block 32; As the electric telescopic rod 37 continues to extend, the cylinder will squeeze the insertion rod 39, which will further squeeze the uppermost square long pin 35 downward, causing the uppermost square long pin 35 to insert into the first through square groove 33 below it and squeeze the square long pin 35 inside it downward. The downward movement of this square long pin 35 will cause the same adjustment process as above to clamp and fix the inner ring of another roller bearing again. Similarly, the lower square long pin 35 will be adjusted in the same way to clamp and fix the inner rings of the roller bearings placed on the four circular plates 3. The thickness of the second rubber clamping block 32 inside the cabinet body 2 increases sequentially from bottom to top, so as to satisfy that the upper second rubber clamping block 32 first contacts the inside of the roller bearing and deforms to clamp and fix the roller bearing, and at the same time enables the multiple square long pins 35 to effectively move downward for adjustment. After all the inner rings of the roller bearings are clamped and fixed, start the first motor 10 to make the cylinder 5 on the bottommost circular plate 3 rotate. The rotation of this cylinder 5 can drive all the cylinders 5 to rotate because the square long pin 35 is inserted into the first through square groove 33. The rotation of the cylinder 5 can drive the inner ring of the roller bearing to rotate through the triangular slider 27, connecting block 28, extrusion rod 29, connecting rod 30, inner clamping block 31 and second rubber clamping block 32, so as to realize the synchronous running-in test operation of the four roller bearings.

[0023] The device for running-in test of roller bearings has a bearing batch test structure, which can perform synchronous running-in test operations on multiple bearings at one time, so as to quickly and effectively obtain a large amount of reliable test data, improve the efficiency and speed of the running-in test of roller bearings. At the same time, this test device has an effective external fixing structure and internal fixing and rotating structure. The external fixing structure can effectively and stably fix the outer ring of the tested roller bearing, and the internal fixing and rotating structure can effectively fix and rotate the inner ring of the tested roller bearing, thus effectively ensuring the stability and reliability of the running-in test. And the structure of this test device is designed simply, easy to use, the operation is stable and reliable, and its performance can meet the use requirements of the running-in test of roller bearings.

[0024] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A running - in test device for a roller bearing, comprising a base (1), characterized in that: A cabinet (2) is fixedly mounted on the top of the base (1), four circular plates (3) are fixedly mounted at equal distances inside the cabinet (2), the axes of all the circular plates (3) are located on the same vertical axis, a large bearing (4) is fixedly mounted in the middle of the circular plate (3), a cylinder (5) penetrating the circular plate (3) is fixedly mounted in the middle of the large bearing (4), a fixing clamping mechanism (6) for externally fixing the roller bearing is installed on the top of the circular plate (3), and a fixing clamping mechanism (6) for internally fixing the roller bearing is installed on the surface of the cylinder (5) located above the circular plate (3). A fixed clamping rotating mechanism (7) is provided, an extrusion component (8) coaxial with the cylinder (5) is installed at the top of the cabinet (2), a cavity (9) is provided inside the base (1), a first motor (10) is installed inside the cavity (9), an output end of the first motor (10) extends into the cabinet (2), and the output end of the first motor (10) is fixedly connected to the bottom of the cylinder (5) on the bottommost circular plate (3), and a second motor (11) drivingly connected to all the fixed clamping mechanisms (6) is installed on the surface of the cabinet (2).

2. The a kind of running - in test device for roller bearings according to claim 1, characterized in that: The fixed clamping mechanism (6) comprises three straight slide grooves (12) which are arranged in an annular manner and at equal distances on the top of the circular plate (3), and a ring groove (13) which is connected to the three straight slide grooves (12) on the top of the circular plate (3) is arranged in the middle of all the circular plates (3), an inverted T-shaped slider (14) is slidably mounted between the ring groove (13) and the straight slide groove (12), an outer clamping block (15) which is located above all the circular plates (3) is fixedly mounted on the top of the inverted T-shaped slider (14), and a first rubber clamping block (16) is fixedly mounted on one side of the outer clamping block (15).

3. A running-in test device for a roller bearing according to claim 2, characterized in that: A rotating ring (17) is installed inside the ring groove (13), and three arc grooves (18) are equidistantly arranged in an annular shape on the top of the rotating ring (17). A toggle pin (19) inserted into the arc groove (18) is fixedly installed at the bottom of the inverted T-shaped slider (14).

4. A running-in test device for a roller bearing according to claim 3, characterized in that: A bevel gear ring (20) is fixedly mounted on the circumferential surface of the rotating ring (17), and an adjusting shaft (21) is rotatably mounted on the circumferential surface of each circular plate (3). One end of the adjusting shaft (21) extends to the inside of the ring groove (13) and is fixedly mounted with a bevel gear (22) meshingly connected to the bevel gear ring (20). The other ends of all the adjusting shafts (21) extend to the outside of the cabinet (2) and are fixedly mounted with a worm gear (23). A worm (24) connected to the output end of the second motor (11) is rotatably mounted on one side of the cabinet (2), and the worm gear (24) is meshingly connected to all the worm gears (23).

5. A running-in test device for a roller bearing according to claim 1, characterized in that: The extrusion component (8) comprises an electric telescopic rod (37) mounted on the top of the cabinet (2), a small bearing (38) being mounted on the telescopic end of the electric telescopic rod (37), and a cylindrical extrusion plug rod (39) being fixedly mounted in the middle of the small bearing (38).

6. The a running - in test device for roller bearings according to claim 5, characterized in that: The fixed clamping and rotating mechanism (7) includes a triangular vertical groove (25) opened in the middle of the circular plate (3). Triangular sliders (27) are slidably installed inside the triangular vertical grooves (25). Three vertical grooves (26) communicating with the triangular vertical grooves (25) are annularly and equidistantly opened on the surface of the circular plate (3). Connecting blocks (28) extending into the three vertical grooves (26) are fixedly connected to the middle parts of the three sides of the triangular sliders (27).

7. The a running-in test device for a roller bearing according to claim 6, wherein: Extrusion rods (29) are rotatably connected to the ends of the connecting blocks (28) located inside the vertical grooves (26). Connecting rods (30) are rotatably installed at the bottoms of the vertical grooves (26). Inner clamping blocks (31) are rotatably connected between the extrusion rods (29) and the connecting rods (30) located inside the same vertical groove (26). Second rubber clamping blocks (32) are fixedly installed on one side of each inner clamping block (31).

8. The a running - in test device for a roller bearing according to claim 7, characterized in that: First through square grooves (33) are opened in the middle of the upper parts of the cylinders (5). Second through square grooves (34) are opened in the middle of the lower parts of the cylinders (5). The triangular vertical grooves (25) are located between the first through square grooves (33) and the second through square grooves (34). Square long pins (35) are movably inserted between the first through square grooves (33) and the second through square grooves (34). The square long pins (35) penetrate through the middle parts of the triangular sliders (27) and are fixedly connected to the triangular sliders (27). Return springs (36) located at the bottoms of the triangular sliders (27) are sleeved on the surfaces of the square long pins (35) located inside the triangular vertical grooves (25).

9. The a kind of running - in test device for roller bearings according to claim 8, characterized in that: The square long pin (35) on the bottommost circular plate (3) does not penetrate through the second through square groove (34).

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