Roller testing device

Abstract

The utility model discloses a roller testing device, including base subassembly, test subassembly and drive subassembly wherein the test subassembly includes accompanying test steel ball, retainer and two bearing outer ring, the aperture of bearing outer ring gradually increases from one side to the other side along the axial direction, the two bearing outer ring is arranged opposite to each other, and the side with smaller aperture is outward, and the drive subassembly includes the accompanying test steel ball of accompanying test steel ball. The retainer comprises a first mounting hole and a second mounting hole which surrounds and is communicated with the first mounting hole, the first mounting hole is used for accommodating a to-be-tested roller, the retainer is arranged between the two bearing outer rings, and the accompanying test steel ball is arranged in the second mounting hole, is limited on the two bearing outer rings and is in contact with the to-be-tested roller. According to the roller testing device, the testing assembly is improved, the acting force vertically acting on the side face of the roller to be tested can be provided, the retainers and the accompanying test steel balls of different specifications and sizes can be replaced, the testing range is expanded, and therefore the roller to be tested can be tested more comprehensively.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing equipment, and particularly relates to a device for testing the fatigue life of bearing rollers. Background Art

[0002] Rolling bearings are important components in mechanical equipment, mainly used to support mechanical rotating bodies. According to the rolling elements, they can be divided into ball bearings (point contact) and roller bearings (line contact). Roller bearings have the advantages of small starting torque, high rotation accuracy, and convenient selection. The service life of the rollers in roller bearings directly determines whether the mechanical equipment can operate normally. Therefore, it is of great significance to test and evaluate the fatigue life of standard cylindrical rollers made of bearing steel. However, general testing machines are costly, and the test objects are not standard cylindrical rollers but cylindrical rollers with non-standard dimensions. In addition, the test speed and load are single, and it is inconvenient to change the test conditions, resulting in a limited test range.

[0003] The information disclosed in this background art section is only intended to enhance the overall understanding of the utility model and should not be construed as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a roller testing device that can conduct life tests on standard rollers of different models.

[0005] To achieve the above purpose, a specific embodiment of the utility model provides a roller testing device, including a base assembly, a testing assembly, and a driving assembly. The base assembly includes a bottom plate, a main sleeve, and an upper cover. The main sleeve is fixed to the bottom plate and forms a first fixing groove. The upper cover is supported on the main sleeve and covers the first fixing groove, and a vibration sensor is fixed to the upper cover. The testing assembly is arranged in the first fixing groove and abuts against the upper cover. The testing assembly includes a companion steel ball, a cage, and two bearing outer rings. The inner diameter of the bearing outer rings gradually increases from one side to the other along the axial direction. The two bearing outer rings are arranged oppositely with the side of smaller inner diameter facing outward. The cage includes a first mounting hole and a second mounting hole surrounding and communicating with the first mounting hole. The first mounting hole is used to accommodate the roller to be tested. The cage is arranged between the two bearing outer rings, and the companion steel ball is arranged in the second mounting hole, which is limited by the two bearing outer rings and contacts the roller to be tested. The driving assembly is supported on the bottom plate and is used to connect and drive the roller to be tested to rotate.

[0006] In one or more embodiments of the present utility model, the base assembly further includes a lower ejector rod and a spring. The main sleeve is provided with a first channel communicating with the first fixing groove. The spring is disposed in the first channel and supported on the bottom plate. The lower ejector rod is supported on the spring and connected to the roller to be tested.

[0007] In one or more embodiments of the present utility model, the base assembly further includes a spring sleeve fixed to the bottom plate and extending into the first channel. The lower ejector rod and the spring are limited within the spring sleeve.

[0008] In one or more embodiments of the present utility model, the driving assembly includes a driving motor supported on the bottom plate and a driving rod connected to the driving motor. The driving rod is connected to and drives the roller to be tested to rotate.

[0009] In one or more embodiments of the present utility model, a limiting groove communicating with the first fixing groove and having a diameter larger than that of the first fixing groove is formed at the upper end of the main sleeve. The upper cover includes a main body portion having the same diameter as the limiting groove and a crimping portion protruding from the main body portion and having a diameter not larger than the diameter of the first fixing groove. The upper cover is provided with a through hole for the driving rod to pass through.

[0010] In one or more embodiments of the present utility model, a third mounting hole for fixing a temperature sensor is provided on the upper cover, and the third mounting hole communicates with the through hole.

[0011] In one or more embodiments of the present utility model, the roller testing device further includes a loading assembly. The loading assembly includes a fixing rod fixed to the bottom plate and a loading rod hinged to the fixing rod. The loading rod protrudes with a protrusion for abutting against the upper cover, and a counterweight is fixed to the end of the loading rod away from the fixing rod.

[0012] In one or more embodiments of the present utility model, the loading rod includes a first loading rod, a second loading rod, and a loading ring. The first loading rod is hinged to the fixing rod. The loading ring is connected to the first loading rod. The protrusion protrudes from the loading ring. The second loading rod is detachably connected to the loading ring, and a counterweight is fixed to the end of the second loading rod away from the loading ring. The driving rod passes through the loading ring.

[0013] In one or more embodiments of the present utility model, the base assembly further includes a sub-sleeve disposed in the first fixing groove. The sub-sleeve is provided with a second fixing groove for accommodating the roller to be tested and a second channel communicating with the second fixing groove. The second channel is coaxial with and has the same diameter as the first channel.

[0014] In one or more embodiments of the present utility model, a first oil injection hole communicating with the first fixing groove is provided on the side wall of the main sleeve, and a second oil injection hole coaxial with the first oil injection hole and communicating with the second fixing groove is provided on the side wall of the sub-sleeve.

[0015] Compared with the prior art, the roller testing device of the present utility model improves the testing component, can provide a force acting vertically on the side surface of the roller to be tested, and can replace the cages and accompanying test steel balls of different specifications and sizes, expanding the testing range, so as to conduct a more comprehensive test on the roller to be tested. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the roller testing device in an embodiment of the present utility model;

[0018] Figure 2 Cross-sectional view of the base assembly and the testing component in an embodiment of the present utility model;

[0019] Figure 3 Exploded view of the base assembly in an embodiment of the present utility model;

[0020] Figure 4 Cross-sectional view of the upper cover in an embodiment of the present utility model;

[0021] Figure 5 Cross-sectional view of the main sleeve in an embodiment of the present utility model;

[0022] Figure 6 Cross-sectional view of the sleeve in an embodiment of the present utility model;

[0023] Figure 7 Exploded view of the testing component and the roller to be tested in an embodiment of the present utility model;

[0024] Figure 8 Exploded view of the loading component in an embodiment of the present utility model;

[0025] Figure 9 Exploded view of the driving component in an embodiment of the present utility model;

[0026] Figure 10 Force view of the testing component in an embodiment of the present utility model.

[0027] Description of Main Reference Numerals:

[0028] 100 - Roller testing device, 10 - Base assembly, 11 - Base plate, 12 - Main sleeve, 121 - First fixing groove, 122 - First channel, 123 - Limiting groove, 124 - First oil injection hole, 13 - Upper cover, 131 - Main body part, 132 - Crimping part, 133 - Through hole, 134 - Third mounting hole, 14 - Lower ejector rod, 15 - Spring, 16 - Spring sleeve, 17 - Sleeve, 18 - Sub - sleeve, 181 - Second fixing groove, 182 - Second channel, 183 - Second oil injection hole, 20 - Testing assembly, 21 - Outer ring of bearing, 22 - Cage, 221 - First mounting hole, 222 - Second mounting hole, 23 - Companion steel ball, 30 - Driving assembly, 31 - Driving motor, 32 - Driving rod, 33 - Coupling, 40 - Loading assembly, 41 - Fixed rod, 42 - Loading rod, 421 - First loading rod, 422 - Second loading rod, 423 - Loading ring, 43 - Protrusion, 50 - Roller to be tested. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] As Figure 1-9As shown in the figure, a roller testing device 100 in an embodiment of the present utility model includes a base assembly 10, a testing assembly 20, and a driving assembly 30. The base assembly 10 includes a base plate 11, a main sleeve 12, and an upper cover 13. The main sleeve 12 is fixed on the base plate 11 and forms a first fixing groove 121. The upper cover 13 is supported on the main sleeve 12 and covers the first fixing groove 121, and a vibration sensor (not shown in the figure) is fixed on the upper cover 13. The testing assembly 20 is placed in the first fixing groove 121 and includes two bearing outer rings 21, a cage 22, and pilot balls 23. The bearing outer rings 21 are tapered rings, and the aperture of the inner hole thereof gradually increases from one side to the other side along the axial direction. The two bearing outer rings 21 are arranged oppositely, with the larger aperture side inside and the smaller aperture side facing outwards. The cage 22 is arranged between the two bearing outer rings 21 and is provided with a first mounting hole 221 and a plurality of second mounting holes 222. The first mounting hole 221 is opened at the middle position, and the second mounting holes 222 surround the first mounting hole 221 and communicate with the first mounting hole 221. Each second mounting hole 222 is respectively provided with a pilot ball 23, and the roller 50 to be tested is arranged in the first mounting hole 221. The driving assembly 30 is supported on the base plate 11 and is used to connect and drive the roller 50 to be tested to rotate.

[0031] The inner ring of the bearing outer ring 21 is tapered. After the two bearing outer rings 21 are combined, a space that is small at both ends and large in the middle is formed inside. Therefore, the pilot balls 23 are limited between the two bearing outer rings 21. And because the first mounting hole 221 and the second mounting holes 222 are communicated, the pilot balls 23 abut against the roller 50 to be tested, converting the axial force of the bearing outer ring 21 into a force acting vertically on the side wall of the roller 50 to be tested. Under the action of the driving assembly 30, the roller 50 to be tested rotates. The upper cover 13 covers the first fixing groove 121 and contacts the roller 50 to be tested, and the vibration amplitude of the testing assembly 20 is monitored by the vibration sensor.

[0032] Refer to Figure 10 , the force on the upper bearing outer ring 21 is applied by the upper cover 13 above, and the force on the lower bearing outer ring 21 is applied by the bottom of the first fixing groove 121 to prevent the pilot balls 23 from detaching or swinging. The pilot balls 23 are squeezed by the inclined inner walls of the bearing outer rings 21 at both the upper and lower ends, and the upward and downward decomposition forces are cancelled out, and the horizontal force is transmitted to the roller 50 to be tested. The roller 50 to be tested is squeezed by the pilot balls 23 to simulate the actual use scenario and is driven to rotate by the driving assembly 30. When the monitored value of the vibration sensor reaches the threshold, it indicates that spalling (i.e., failure) occurs on the roller 50 to be tested. The structure of the roller testing device 100 is simple, and since the components of the testing assembly 20 are detachable from each other, different specifications of cages 22, as well as different numbers and sizes of pilot balls 23, can be replaced to conduct life tests on standard rollers of different specifications, with relatively high flexibility.

[0033] Specifically, the driving component 30 includes a driving motor 31 supported on the bottom plate 11 and a driving rod 32 connected to the driving motor 31. The driving rod 32 is connected to and drives the roller 50 to be measured to rotate. Preferably, the driving motor 31 is fixedly connected to the driving rod 32 through a coupling 33, and the driving motor 31 has a variable speed and can drive the roller 50 to be measured to rotate at different speeds, with relatively high flexibility.

[0034] Preferably, the base component 10 further includes a lower ejector rod 14 and a spring 15. A first channel 122 communicating with the first fixing groove 121 is further provided on the main sleeve 12. The spring 15 is disposed in the first channel 122 and supported on the main sleeve 11, and the lower ejector rod 14 is disposed in the first channel 122 and supported on the spring 15. The other end of the lower ejector rod 14 is connected to the roller 50 to be measured and is used to provide support for the roller 50 to be measured from below. At the same time, the spring 15 can provide buffering, enabling the roller 50 to be measured to perform fine position adjustment in the axial direction, further improving the flexibility of the test.

[0035] Furthermore, the base component 10 further includes a spring sleeve 16. The spring sleeve 16 is fixed on the bottom plate 11 and extends into the first channel 122. The lower ejector rod 14 and the spring 15 are limited within the spring sleeve 16. A sleeve 17 is provided between the lower ejector rod 14 and the spring 15, and the end of the spring 15 is limited within the sleeve 17 to prevent the end of the spring 15 from deforming and affecting the buffering effect.

[0036] As Figure 5 shown, a limiting groove 123 communicating with the first fixing groove 121 is provided at the upper end of the main sleeve 12, and its diameter is larger than that of the first fixing groove 121. The upper cover 13 includes a main body portion 131 and a crimping portion 132 protruding from the main body portion 131. The diameter of the main body portion 131 is the same as (or slightly smaller than) that of the limiting groove 123. The test component 20 is placed into the first fixing groove 121 and the upper cover 13 is covered. At this time, the crimping portion 132 contacts the outer ring 21 of the bearing located above and is used to apply a force to the roller 50 to be measured, while the main body portion 131 is located in the limiting groove 123. The limiting groove 123 is used to limit the moving direction of the upper cover 13, so that the upper cover 13 can only move axially along the first fixing groove 121, avoiding abnormal movement of the upper cover 13 in other directions. A through hole 133 is further provided on the upper cover 13 for the driving rod 32 to pass through.

[0037] Preferably, in addition to being fixed with a vibration sensor, a third mounting hole 134 is further provided on the upper cover 13. The third mounting hole 134 communicates with the through hole 133 and is used to fix a temperature sensor for monitoring the temperature change of the test component 20 and the roller 50 to be measured during the test.

[0038] In one embodiment, it further includes a loading component 40 for applying a load to the roller 50 to be measured. Specifically, the loading component 40 includes a fixing rod 41 and a loading rod 42. The fixing rod 41 is fixed on the bottom plate 11. The loading rod 42 is hinged to the fixing rod 41, and a protrusion 43 abutting against the upper cover 13 is provided on the loading rod 42. When it is necessary to place or remove the roller 50 to be measured, the loading rod 42 is rotated upward to move it away from the upper cover; after the roller 50 to be measured is placed, the loading rod 42 is rotated downward so that the protrusion 43 presses against the upper cover 13.

[0039] Preferably, the loading rod 42 includes a first loading rod 421, a second loading rod 422 and a loading ring 423. The first loading rod 421 is hinged to the fixing rod 41, the loading ring 423 is connected to the first loading rod 421, and the driving rod 32 passes through the loading ring 423. The second loading rod 422 is connected to the loading ring 423, and a counterweight (such as a weight) is fixed at the end of the second loading rod 422 away from the loading ring 423. Since the second loading rod 422 is detachably fixed to the loading ring 423, different lengths of the second loading rod 422 can be replaced as needed during testing to provide different lengths of force arms, thereby expanding the load range and testing range that can be provided.

[0040] In one embodiment, the base assembly 10 further includes a sub-sleeve 18. The sub-sleeve 18 is disposed in the first fixing groove 121, and is provided with a second fixing groove 181 and a second channel 182 communicating with the second fixing groove 181. The second channel 182 is coaxial with and has the same diameter as the first channel 122. When the size of the test assembly 20 does not meet the size of the first fixing groove 121, the sub-sleeve 18 can be placed in the first fixing groove 121, and then the test assembly 20 can be placed in the second fixing groove 181 for testing. And sub-sleeves 18 with different-sized second fixing grooves 181 can be prefabricated to adapt to test assemblies 20 of different specifications, with relatively high flexibility.

[0041] It is easy to think that, in order to reduce friction, a first oil injection hole 124 communicating with the first fixing groove 121 is provided on the main sleeve 12 to inject lubricating oil during testing. Similarly, a second oil injection hole 183 communicating with the second fixing groove 181 is provided on the sub-sleeve 18, and after being placed in a proper position, the two oil injection holes are coaxially communicated.

[0042] In one embodiment, the roller 50 to be measured, the lower ejector rod 14 and the driving rod 32 are fixed through a straight slot and a straight protrusion, that is, straight protrusions are simultaneously provided at the connection ends of the driving rod 32 and the lower ejector rod 14, and straight slots are respectively provided at both ends of the roller 50 to be measured. Inserting the straight protrusion into the straight slot can realize the fixation between the lower ejector rod 14, the driving rod 32 and the roller 50 to be measured. Preferably, the straight slots at both ends of the roller 50 to be measured are perpendicular to each other.

[0043] In combination with specific usage scenarios, the roller testing device 100 in the present utility model will be further described herein.

[0044] Before the test starts, assemble the test assembly 20. Assemble the bearing outer ring 21 and the cage 22 located below in sequence. Place the accompanying test steel balls 23 and the rollers 50 to be tested into the second mounting hole 222 and the first mounting hole 221 respectively, and finally assemble the bearing outer ring 21 above. Then rotate the loading rod 42 upward to lift the upper cover 09, place the assembled test assembly 20 into the first fixing groove 121 or the second fixing groove 181, connect the roller 50 to be tested to the lower ejector rod 14 and the driving rod 32 in sequence, cover the upper cover 13, and fix the driving motor 31 and the driving rod 32 through the coupling 33. Finally, according to the test requirements, fix weights or other counterweights at the distal end of the loading rod 42, then rotate the loading rod 42 downward to press it against the upper cover 13, attach the vibration sensor to the upper cover 13, insert the temperature sensor into the third mounting hole 134, supply oil through the first oil injection hole 124 and the second oil injection hole 183, set the rotational speed and vibration threshold in the measurement and control system, and click start to conduct the test. When the vibration value exceeds the set threshold, that is, when the roller 50 to be tested experiences spalling (i.e., failure), the test stops and the running time of the roller is recorded.

[0045] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any perspective, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0046] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A roller testing device, characterized in that, Comprising: A base assembly, including a bottom plate, a main sleeve and an upper cover. The main sleeve is fixed to the bottom plate and formed with a first fixing groove. The upper cover is supported on the main sleeve and covers the first fixing groove. A vibration sensor is fixed to the upper cover. A test assembly, arranged in the first fixing groove and abutted against the upper cover. The test assembly includes a companion test steel ball, a cage and two bearing outer rings. The inner diameter of the bearing outer ring gradually increases from one side to the other along the axial direction. The two bearing outer rings are arranged oppositely with the side of smaller inner diameter facing outward. The cage includes a first mounting hole and a second mounting hole surrounding and communicating with the first mounting hole. The first mounting hole is used for accommodating the roller to be tested. The cage is arranged between the two bearing outer rings. The companion test steel ball is arranged in the second mounting hole, which is limited by the two bearing outer rings and contacts the roller to be tested. A driving assembly, supported on the bottom plate, for connecting and driving the roller to be tested to rotate.

2. The roller testing device according to claim 1, characterized in that, The base assembly further includes a lower ejector rod and a spring. The main sleeve is provided with a first channel communicating with the first fixing groove. The spring is arranged in the first channel and supported on the bottom plate. The lower ejector rod is supported on the spring and connected to the roller to be tested.

3. The roller testing device according to claim 2, wherein The base assembly further includes a spring sleeve fixed to the bottom plate and extending into the first channel. The lower ejector rod and the spring are limited in the spring sleeve.

4. The roller testing device according to claim 1, characterized in that, The driving assembly includes a driving motor supported on the bottom plate and a driving rod connected to the driving motor. The driving rod is connected to and drives the roller to be tested to rotate.

5. The roller testing device according to claim 4, wherein The upper end of the main sleeve is provided with a limiting groove communicating with the first fixing groove and having a diameter larger than that of the first fixing groove. The upper cover includes a main body portion having the same diameter as the limiting groove and a crimping portion protruding from the main body portion and having a diameter not larger than that of the first fixing groove. The upper cover is provided with a through hole for the driving rod to pass through.

6. The roller testing device according to claim 5, characterized in that The upper cover is provided with a third mounting hole for fixing a temperature sensor. The third mounting hole communicates with the through hole.

7. The roller testing device according to claim 5, characterized in that, It further includes a loading assembly. The loading assembly includes a fixing rod fixed to the bottom plate and a loading rod hinged to the fixing rod. The loading rod protrudes with a protrusion for abutting against the upper cover. The end of the loading rod away from the fixing rod is used for fixing a counterweight.

8. The roller testing device according to claim 7, characterized in that, The loading rod includes a first loading rod, a second loading rod and a loading ring. The first loading rod is hinged to the fixing rod. The loading ring is connected to the first loading rod. The protrusion protrudes from the loading ring. The second loading rod is detachably connected to the loading ring. The end of the second loading rod away from the loading ring is used for fixing a counterweight. The driving rod passes through the loading ring.

9. The roller testing device according to claim 1, characterized in that, The base assembly further includes a sub-sleeve arranged in the first fixing groove. The sub-sleeve is provided with a second fixing groove for accommodating the roller to be tested and a second channel communicating with the second fixing groove. The second channel is coaxial with and has the same diameter as the first channel.

10. The roller testing device according to claim 9, characterized in that, A first oil injection hole communicating with the first fixing groove is formed on the side wall of the main sleeve. A second oil injection hole coaxial with the first oil injection hole and communicating with the second fixing groove is formed on the side wall of the sub-sleeve.

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