Testing device for fatigue life experiment of sealed outer ring needle roller bearing
By designing a test device including a base, a test bench, a force sensor, a test cylinder, a pressure plate and a bracket, the fatigue test problem of sealed outer ring needle roller bearing single body in the prior art is solved, and efficient and accurate bearing fatigue life test is achieved.
Patent Information
- Application Number
- CN202421927064.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The prior art is difficult to effectively carry out the single-body bottom fatigue test of sealed outer ring needle roller bearings, resulting in a long test cycle of bearing fatigue life, high cost and difficult debugging.
A test device including a base, a test bench, a force sensor, a test cylinder, a pressure plate and a bracket is designed. By adjusting the initial extension amount and air pressure of the test cylinder, the preload and maximum load on the bottom of the bearing outer ring is controlled, and the displacement change of the bearing is detected through the displacement sensor.
The efficient fatigue life test of sealed outer ring needle roller bearing is realized, which simplifies testing operations, reduces costs, and improves the accuracy and reliability of the test.
Smart Images
Figure CN222866224U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a testing device for testing the fatigue life of a sealed outer ring needle roller bearing. Background Art
[0002] At present, in many operating conditions of sealed outer ring needle roller bearings, such as automobile universal joint bearings, engineering machinery transmission shaft bearings, etc., the first failure mode of the bearings is mostly fatigue cracking at the bottom (sealed end) of the outer ring. There is currently no effective tooling and method to implement the fatigue test of the single bottom of the bearings in these operating conditions, and the fatigue condition of the bearing can only be tested and fed back through system assembly tests. However, the assembly test cycle is long, involving many parts, the test debugging is difficult, and the cost is high, which is not conducive to the early development and verification of the product. Utility Model Content
[0003] In view of the deficiencies in the prior art, the utility model provides a testing device for fatigue life tests of sealed outer ring needle roller bearings, which has a simple and reliable structure, stable operation, and can effectively perform fatigue life tests on sealed outer ring needle roller bearings, and has a good use effect.
[0004] To achieve the above-mentioned purpose, the utility model provides a testing device for fatigue life experiment of sealed outer ring needle roller bearings, comprising a base, a test bench is arranged on one side of the base, a force sensor is arranged on the test bench, a bearing tooling for assembling the bearing to be tested is arranged on the sensing end of the force sensor, a test cylinder is arranged on the other side of the base, the output end of the test cylinder is arranged along the height direction, a pressure plate and a bracket are arranged on the base between the test bench and the test cylinder, a test mandrel for cooperating with the bearing to be tested and a displacement sensor for detecting the displacement of the test mandrel are arranged on the bracket corresponding to the position of the test tooling, the pressure plate is rotatably connected to the bracket, one end of the pressure plate abuts against the output end of the test cylinder, and the other end abuts against the test mandrel.
[0005] The beneficial effects of such a setting are as follows: such a setting, when in use, by adjusting the initial extension of the test cylinder, the force sensor value displayed on the PLC monitoring screen is made consistent with the initial force to be applied, thereby realizing the application of preload to the bottom of the outer ring of the test bearing; by clearing the change value of the displacement sensor, the displacement value fed back by the displacement sensor is adjusted to zero; the output end of the test cylinder is controlled to extend by the PLC, and then the air pressure is adjusted to a suitable value by adjusting the pressure regulating valve, and the suitable value refers to the value of the force sensor feedback displayed on the PLC monitoring screen during the air pressure adjustment process. When the displayed force is consistent with the maximum load to be applied, the air pressure reaches a suitable value, thereby realizing the control of the maximum load on the bottom of the outer ring of the bearing; the position value of the displacement sensor feedback is read and compared with the failure value of the set test, or through the PLC setting, the equipment stops when the feedback value, that is, the deformation amount, reaches a certain amount; it can be set so that the test bearing passes the transmission position test multiple times, thereby realizing all-round detection. This structure is simple and reliable, the test operation is convenient, and it has a good use effect.
[0006] As a further configuration of the present invention, the displacement sensor is connected to the bracket through a detection frame, the detection frame includes a connecting part and an assembly part connected to each other, the connecting part and the assembly part are perpendicular to each other, the connecting part is attached to the side wall of the bracket, the assembly part is arranged above the test core shaft, and the displacement sensor is installed on the assembly part.
[0007] The beneficial effect of such an arrangement is that, by such an arrangement, while ensuring the positioning and installation of the displacement sensor, it can be ensured that the detection part of the displacement sensor can fall above the test spindle, thereby ensuring the accuracy and reliability of the detection.
[0008] As a further configuration of the utility model, an adjusting long slot is provided on the connecting portion along the length direction of the base, a positioning hole is provided on the side wall of the bracket corresponding to the position of the adjusting long slot, and a positioning bolt for tightly fitting with the positioning hole is provided on the adjusting long slot.
[0009] The beneficial effect of such an arrangement is that it is easy to adjust the position of the displacement sensor so as to meet the detection requirements of different specifications, and the operation is simple, easy to implement, and has a good use effect.
[0010] As a further configuration of the utility model, the pressing plate abuts against the output end of the test cylinder through the cylinder frame, one end of the cylinder frame is fixedly connected to the output end of the test cylinder, and the other end is rotatably connected to the pressing plate.
[0011] The beneficial effect of such an arrangement is that, through such an arrangement, power output can be carried out more stably, and at the same time, the structure is stable and will not deviate, thus having a good use effect.
[0012] As a further configuration of the utility model, the pressure plate is connected to the bracket through a connecting frame, the connecting frame is provided with a plurality of connecting holes, the bracket is provided with a plurality of matching holes at positions corresponding to the connecting holes, and the connecting holes are also provided with connecting bolts for tightly matching with the matching holes.
[0013] The beneficial effect of such arrangement is that the height position can be adjusted through the connecting frame to meet the testing requirements of test bearings of different specifications, thereby improving the adaptability of the structure, and the structure is simple, easy to implement, and has a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a front structural schematic diagram of an embodiment of the utility model;
[0015] Figure 2 It is a rear structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION
[0016] The utility model is used for implementing the testing device for fatigue life test of sealed outer ring needle roller bearing. Figure 1 and Figure 2As shown: it includes a base 1, a test bench is arranged on one side of the base 1, a force sensor 11 is arranged on the test bench, a bearing fixture 12 for assembling the bearing to be tested is arranged on the sensing end of the force sensor 11, a test cylinder 3 is arranged on the other side of the base 1, the output end of the test cylinder 3 is arranged along the height direction, a pressing plate 4 and a bracket 2 are arranged between the test bench and the test cylinder 3 on the base 1, a test mandrel 7 for cooperating with the bearing to be tested and a displacement sensor 6 for detecting the displacement of the test mandrel 7 are arranged on the bracket 2 corresponding to the position of the test fixture, the pressing plate 4 is rotatably connected to the bracket 2, one end of the pressing plate 4 abuts against the output end of the test cylinder 3, and the other end abuts against the test mandrel 7. The beneficial effects of such arrangement are as follows: such arrangement, when in use, by adjusting the initial extension amount of the test cylinder 3, the value of the force sensor 11 displayed on the PLC monitoring screen is made consistent with the initial force to be applied, thereby realizing the application of preload to the bottom of the outer ring of the test bearing; by clearing the change value of the displacement sensor 6, the displacement value fed back by the displacement sensor 6 is adjusted to zero; the output end of the test cylinder 3 is controlled to extend by the PLC, and then the air pressure is adjusted to a suitable value by adjusting the pressure regulating valve, the suitable value refers to the value of the force sensor 11 feedback displayed on the PLC monitoring screen during the air pressure adjustment process, when the displayed force is consistent with the maximum load to be applied, the air pressure reaches a suitable value, thereby realizing the control of the maximum load on the bottom of the outer ring of the bearing; the position value of the value fed back by the displacement sensor 6 is read and compared with the failure value of the set test, or through the PLC setting, the equipment stops when the feedback value, i.e., the deformation amount, reaches a certain amount; it can be set so that the test bearing passes the transmission position test multiple times, thereby realizing all-round detection, this structure is simple and reliable, the test operation is convenient, and has a good use effect.
[0017] As a further configuration of this embodiment, the displacement sensor 6 is connected to the bracket 2 through the detection bracket 5, and the detection bracket 5 includes a connecting portion 52 and an assembly portion 51 connected to each other, the connecting portion 52 and the assembly portion 51 are perpendicular to each other, the connecting portion 52 is attached to the side wall of the bracket 2, the assembly portion 51 is arranged above the test mandrel 7, and the displacement sensor 6 is installed on the assembly portion 51. The beneficial effect of this configuration is that by this configuration, while ensuring the positioning and installation of the displacement sensor 6, it can be ensured that the detection portion of the displacement sensor 6 can fall above the test mandrel 7, thereby ensuring the accuracy and reliability of the detection.
[0018] As a further configuration of this embodiment, an adjustment slot 53 is provided on the connecting portion 52 along the length direction of the base 1, a positioning hole is provided on the side wall of the bracket 2 at a position corresponding to the adjustment slot 53, and a positioning bolt for tightly fitting with the positioning hole is provided on the adjustment slot 53. The beneficial effect of this configuration is that it is convenient to adjust the position of the displacement sensor 6, thereby meeting the detection requirements of different specifications, and the operation is simple, easy to implement, and has a good use effect.
[0019] As a further configuration of this embodiment, the pressing plate 4 contacts the output end of the test cylinder 3 through the cylinder frame 31, one end of the cylinder frame 31 is fixedly connected to the output end of the test cylinder 3, and the other end is rotatably connected to the pressing plate 4. The beneficial effect of this configuration is that through this configuration, power output can be more stably performed, and the structure is stable, and there will be no deviation, which has a good use effect.
[0020] As a further configuration of this embodiment, the pressure plate 4 is connected to the bracket 2 through a connecting frame 41, and the connecting frame 41 is provided with a plurality of connecting holes 42, and the bracket 2 is provided with a plurality of matching holes at positions corresponding to the connecting holes 42, and the connecting holes 42 are also provided with connecting bolts for tightly matching the matching holes. The beneficial effect of such a configuration is that, through such a configuration, the height position can be adjusted through the connecting frame 41, so that the test bearings of different specifications can be tested, the adaptability of the structure is improved, and the structure is simple, easy to implement, and has a good use effect.
[0021] The above example is only one preferred specific example of the present invention. The common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.
Claims
1. A testing device for fatigue life test of sealed outer ring needle roller bearing, comprising a base, one side of which is provided with a test bench, characterized in that: A force sensor is arranged on the test bench, and a bearing tooling for assembling the bearing to be tested is arranged on the sensing end of the force sensor. A test cylinder is arranged on the other side of the base, and the output end of the test cylinder is arranged along the height direction. A pressure plate and a bracket are arranged on the base between the test bench and the test cylinder. A test mandrel for cooperating with the bearing to be tested and a displacement sensor for detecting the displacement of the test mandrel are arranged on the bracket corresponding to the position of the test tooling. The pressure plate is rotatably connected to the bracket, and one end of the pressure plate abuts against the output end of the test cylinder, and the other end abuts against the test mandrel.
2. The testing device for fatigue life test of sealed outer ring needle roller bearing according to claim 1, characterized in that: The displacement sensor is connected to the bracket through a detection frame, and the detection frame includes a connecting part and an assembly part connected to each other, the connecting part and the assembly part are perpendicular to each other, the connecting part is attached to the side wall of the bracket, the assembly part is arranged above the test core shaft, and the displacement sensor is installed on the assembly part.
3. The testing device for fatigue life test of sealed outer ring needle roller bearing according to claim 2, characterized in that: The connecting portion is provided with an adjusting long slot along the length direction of the base, the side wall of the bracket is provided with a positioning hole corresponding to the position of the adjusting long slot, and the adjusting long slot is provided with a positioning bolt for tightly matching with the positioning hole.
4. The testing device for fatigue life test of sealed outer ring needle roller bearing according to claim 1, characterized in that: The pressing plate contacts the output end of the test cylinder through the cylinder frame. One end of the cylinder frame is fixedly connected to the output end of the test cylinder, and the other end is rotatably connected to the pressing plate.
5. The testing device for fatigue life test of sealed outer ring needle roller bearing according to claim 1, characterized in that: The pressure plate is connected to the bracket through a connecting frame, the connecting frame is provided with a plurality of connecting holes, the bracket is provided with a plurality of matching holes at positions corresponding to the connecting holes, and the connecting holes are also provided with connecting bolts for tightly matching with the matching holes.