CN112763210A - Double-station hub bearing unit working condition simulation testing machine - Google Patents
Double-station hub bearing unit working condition simulation testing machine Download PDFInfo
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- CN112763210A CN112763210A CN202110055669.0A CN202110055669A CN112763210A CN 112763210 A CN112763210 A CN 112763210A CN 202110055669 A CN202110055669 A CN 202110055669A CN 112763210 A CN112763210 A CN 112763210A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention relates to a double-station hub bearing unit working condition simulation testing machine which comprises a main shaft transmission unit, a hub bearing testing unit and a loading unit, wherein the left side and the right side of a main shaft are respectively and fixedly connected with the two hub bearing testing units, one end of an axial hydraulic loading mechanism is longitudinally and adjustably arranged on a side plate of a loading seat, the other end of the axial hydraulic loading mechanism is longitudinally and adjustably arranged on a vertical plate of a loading arm, one end of a radial hydraulic loading mechanism is fixed on the loading seat, the other end of the radial hydraulic loading mechanism is fixed on a base plate of the loading arm, a shaft hole is formed in a back plate of the loading arm, one end of a testing shaft is fixed in the shaft hole, a hub bearing is assembled on the periphery of the other end of the testing shaft. The invention adopts the double-head cantilever, the axial stress of the main shaft bearing is small, two sets of hub bearings can be tested simultaneously, and the load of the hub bearings can simulate the stress condition of a vehicle in the running process more truly.
Description
Technical Field
The invention relates to a double-station hub bearing unit working condition simulation testing machine.
Background
In the actual operation process, the heavy truck hub bearing unit not only needs to bear the radial load generated by the self weight of the heavy truck, but also needs to bear the positive and negative alternating axial unbalance load acted on the hub by the ground when the heavy truck turns, and lateral wind blows exist. In addition, in consideration of actual specific driving road conditions and running environments, the rotating speed, load and wind blowing environment of the heavy truck hub bearing unit cannot be changed, in order to effectively evaluate the service life of the heavy truck hub bearing unit, a heavy truck hub bearing unit working condition simulation testing machine needs to be developed, and the service life and reliability of the heavy truck hub bearing unit are comprehensively checked and evaluated by simulating operation of the heavy truck hub bearing unit under working conditions such as a rotating speed spectrum, a load spectrum and a wind speed spectrum. At present, the structure of a simulation test device for testing a bearing unit of a counterweight clamp hub is unreasonable, the structure of the device is too complex or too simple and crude, and the real running condition of the device cannot be fully simulated.
In the heavy truck hub bearing testing device with the patent application number of 201910625505.X, through structural arrangement, a hub bearing test is enabled to simulate the stress condition of a vehicle in the running process in a vertical state, so that the reliability of the bearing performance test is greatly improved. However, since the axial loading mechanism and the radial loading mechanism for applying load to the hub bearing are respectively arranged above and below the hub bearing, which is inconsistent with the actual working state of the hub bearing, in actual use, the axial load and the radial load borne by the hub bearing unit are both from the axial force and the radial force of the ground to the same point of the bottom of the tire. In addition, the device is of a single-head cantilever structure, the main shaft bearing is required to bear larger alternating axial load along with the hub bearing test unit, and the service life and reliability of the main shaft bearing are also greatly reduced. Therefore, further improvement is needed to simulate the actual working condition as much as possible and improve the service life of the main shaft bearing.
Disclosure of Invention
In view of this, the invention aims to provide a double-head cantilever structure, which can simulate the actual working condition as much as possible during the test, reduce the axial load of a main shaft bearing, and prolong the service life of the main shaft bearing.
In order to achieve the purpose, the invention adopts the double-station hub bearing unit working condition simulation testing machine which comprises
The main shaft transmission unit comprises a motor, a transmission belt and a belt wheel which are in transmission connection, the belt wheel is used for driving the main shaft to rotate, the transmission direction of the transmission belt is orthogonal to the axis of the main shaft, and the belt wheel is fixedly sleeved at the center of the main shaft;
the hub bearing test unit comprises a test shaft, a hub bearing and a hub, wherein the left side and the right side of the main shaft are respectively and fixedly connected with the two hub bearing test units;
the loading unit comprises a loading arm, an axial hydraulic loading mechanism and a radial hydraulic loading mechanism, wherein the loading arm is in a seat shape and comprises a back plate, a seat plate, a vertical plate and a base plate which are sequentially and continuously connected, one end of the axial hydraulic loading mechanism is longitudinally and adjustably mounted on the side plate of the loading seat, the other end of the axial hydraulic loading mechanism is longitudinally and adjustably mounted on the vertical plate of the loading arm, one end of the radial hydraulic loading mechanism is fixed on the loading seat, and the other end of the radial hydraulic loading mechanism is fixed on the base plate of the loading arm;
the back plate of the loading arm is provided with a shaft hole, one end of the test shaft is fixed in the shaft hole, the periphery of the other end of the test shaft is provided with a hub bearing, and the outer ring of the hub bearing is provided with a hub driven by a main shaft.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the two hub bearing test units are respectively and fixedly connected to the left side and the right side of the main shaft, so that a double-head cantilever is realized, axial pressures applied to the main shaft by the hub bearing test units at the two ends can be mutually offset, the axial force borne by the main shaft bearing becomes very small, the main shaft bearing is protected to the great extent, and the service life of the main shaft bearing is prolonged;
2. the two ends of the main shaft are respectively provided with a testing station, the output of the main shaft transmission unit can be used for testing two sets of hub bearings, the testing efficiency can be greatly improved, the two sets of hub bearings are provided with independent simulation testing mechanisms, the testing processes of the two stations are independent,
do not interfere with each other;
3. the axial hydraulic loading mechanism and the radial hydraulic loading mechanism are loaded by the loading arm and the test axial hub bearing, so that the stress condition of the vehicle in the running process is simulated really, and the reliability of the bearing performance test is greatly improved.
In particular, the loading base is horizontally and adjustably mounted on the bottom plate. But the loading seat horizontal adjustment position, the loading and unloading of the hub bearing test unit of being convenient for on the one hand, the adjustment of the radial stress point of the hub bearing test unit of being convenient for on the other hand to various atress circumstances of accurate simulation hub bearing.
Particularly, the radial hydraulic loading mechanism comprises a radial hydraulic cylinder, a radial pressure sensor, a second radial loading head and a first radial loading head which are connected in sequence, the first radial loading head is connected with a base plate of the loading arm, a rolling friction component is arranged between the first radial loading head and the second radial loading head, and the matching surfaces of the rolling friction component and the first radial loading head and the second radial loading head which are contacted with the rolling friction component are in a micro-arc shape. By adopting the low-friction rolling friction assembly, the radial hydraulic loading head can smoothly adjust the radial stress point, and the mutual interference influence of the radial load and the axial load is avoided.
Particularly, the axial hydraulic loading mechanism comprises a sensor seat, an axial pressure sensor and an axial hydraulic cylinder which are sequentially connected, the sensor seat is hinged with a first joint seat, a cylinder head of the axial hydraulic cylinder is hinged with a second joint seat, the first joint seat and an adjusting plate are respectively arranged on two sides of a vertical plate and are fixedly connected through screwing of screws, and the second joint seat and a pressing plate are respectively arranged on two sides of a side plate of the loading seat and are fixedly connected through screwing of screws.
Particularly, clearance holes for screws to slide are formed in the vertical plate and a side plate of the loading seat, a nut positioning block is arranged on the side plate of the loading seat, the first axial loading adjusting screw rod and the nut positioning block keep unchanged in displacement, the first axial loading adjusting screw rod penetrates through the second joint seat and vertically extends, an adjusting nut plate is fixed on the base plate, the second axial loading adjusting screw rod and the adjusting plate keep unchanged in displacement, and the second axial loading adjusting screw rod sequentially penetrates through the adjusting plate and the adjusting nut plate and vertically extends. Through the arrangement of the structure, the axial hydraulic loading position, namely the force arm size of the axial force, can be adjusted through the first axial loading adjusting screw rod and the second axial loading adjusting screw rod. The arrangement of the first joint seat and the second joint seat can ensure that the axial force is horizontally loaded to the test shaft.
In particular, two clearance holes are provided with corresponding scales with the same measurement beside. By combining the reading of the scale, the first axial loading adjusting screw rod and the second axial loading adjusting screw rod can be ensured to move upwards or downwards by the same distance, and the level of the test shaft is further ensured.
Particularly, the hub bearing test unit is fixedly connected with the main shaft through a transition disc and a fixed disc in sequence. Through the arrangement of the structure, the hub bearing test unit can be conveniently connected with the main shaft.
Particularly, the double-station hub bearing unit working condition simulation testing machine is provided with fans, the fans blow air to the corresponding hub bearing test units through air pipe openings, and wind sensors are arranged at positions close to the air pipe openings. Through the arrangement of the structure, the wind power environment of the hub bearing test unit can be simulated really, and the simulation of a wind power spectrum is realized through the control of the fan.
Drawings
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an embodiment of the present invention;
FIG. 4 is an assembly structure diagram of a main shaft and a bearing test unit of a hub at two ends in the embodiment of the invention;
FIG. 5 is a structural diagram of a hub bearing test unit on one side, and an axial hydraulic loading unit and a radial hydraulic loading unit corresponding to the hub bearing test unit on one side in the embodiment of the invention;
fig. 6 is a perspective view of one of the axial and radial hydraulic loading units in an embodiment of the present invention.
In the figure: 1. a base plate; 11. a slide rail; 12. an upper cover of the casting box; 13. a casting box lower seat; 2. a main shaft; 21. labyrinth seal end covers; 23. an end cap; 24. a pulley; 25. a motor; 26. a main shaft bearing seat; 27. a main shaft bearing; 30. a transition disk; 31. fixing the disc; 32. a hub; 33. a test shaft; 34. a hub bearing; 35. locking the nut; 41. a first joint seat; 42. a sensor seat; 43. an axial pressure sensor; 44. an axial hydraulic cylinder; 45. a second joint seat; 46. a first axially loaded adjusting screw; 461. a screw positioning block; 47. a loading arm; 471. a back plate; 4711. a shaft hole; 472. a seat plate; 473. a vertical plate; 474. a base plate; 48. a loading base; 481. avoiding a void; 482. a scale; 49. a first radial loading head; 410. a radial pressure sensor; 411. a radial hydraulic cylinder; 412. radially loading an adjusting screw; 413. a second axial loading adjusting screw; 4131. an adjusting plate; 4132. adjusting the nut plate; 414. a rolling friction assembly; 415. a second radial loading head; 51. a fan; 52. a wind sensor; 53. the tuyere opening.
Detailed Description
As shown in figures 1-6, a double-station hub bearing unit working condition simulation testing machine comprises
The main shaft transmission unit comprises a motor 25, a transmission belt and a belt wheel 24 which are in transmission connection, the belt wheel 24 is used for driving the main shaft 2 to rotate, the transmission direction of the transmission belt is orthogonal to the axis of the main shaft 2, and the belt wheel 24 is fixedly sleeved at the central position of the main shaft 2;
the hub bearing test unit comprises a test shaft 33, a hub bearing 34 and a hub 32, and the left side and the right side of the main shaft 2 are respectively and fixedly connected with the two hub bearing test units;
the loading unit comprises a loading arm 47, an axial hydraulic loading mechanism and a radial hydraulic loading mechanism, wherein the loading arm 47 is in a seat shape and comprises a back plate 471, a seat plate 472, a vertical plate 473 and a cushion plate 474 which are sequentially and continuously connected, one end of the axial hydraulic loading mechanism is longitudinally and adjustably mounted on a side plate of the loading seat 48, the other end of the axial hydraulic loading mechanism is longitudinally and adjustably mounted on the vertical plate 473 of the loading arm 47, one end of the radial hydraulic loading mechanism is fixed on the loading seat 48, and the other end of the radial hydraulic loading mechanism is fixed on the cushion plate 474 of the loading arm 47;
a back plate 471 of the loading arm 47 is provided with a shaft hole 4711, one end of the test shaft 33 is fixed to the shaft hole 4711, the other end of the test shaft 33 is peripherally provided with a hub bearing 34, and the outer ring of the hub bearing 34 is provided with a hub 32 driven by the main shaft 2. Thereby, the outer ring of the hub bearing 34 rotates with the main shaft 2, and the inner ring and the test shaft 33 are kept stationary.
Here, if one end of the test shaft 33 is mounted on the main shaft 2, the hub 32 is fixedly connected to the back plate 471 of the loading arm 47, fine adjustment is performed through the structure of the hub bearing test unit, rotation of the stationary inner ring of the outer ring of the hub bearing is realized, and operation simulation of the automobile hub bearings of different types in a driving state is further realized.
Two sides of the belt wheel 24 are respectively provided with a main shaft bearing 27, the periphery of the main shaft bearing 27 is sleeved with a main shaft bearing seat 26, a spacer ring is arranged between the main shaft bearing 27 and the belt wheel 24, one side of the main shaft bearing seat 26 is provided with an end cover 23, and the other side of the main shaft bearing seat is provided with a labyrinth seal end cover 21.
The loading base 48 is horizontally adjustably mounted to the base plate 1.
The radial hydraulic loading mechanism comprises a radial hydraulic cylinder 411, a radial pressure sensor 410, a second radial loading head and a first radial loading head which are connected in sequence, the first radial loading head is connected with a base plate of a loading arm, a rolling friction component 414 is arranged between the first radial loading head 49 and the second radial loading head 415, and the matching surfaces of the rolling friction component 414, the first radial loading head 49 which is in contact with the rolling friction component 414 and the second radial loading head 415 are in a micro-arc shape.
The axial hydraulic loading mechanism comprises a sensor seat 42, an axial pressure sensor 43 and an axial hydraulic cylinder 44 which are sequentially connected, the sensor seat 42 is hinged with a first joint seat 41, a cylinder head of the axial hydraulic cylinder 44 is hinged with a second joint seat 45, the first joint seat 41 and an adjusting plate 4131 are respectively arranged on two sides of a vertical plate 473 and are fixedly connected through screwing of screws, and the second joint seat 45 and a pressing plate are respectively arranged on two sides of a side plate of a loading seat 48 and are fixedly connected through screwing of screws.
The side plates of the vertical plate 473 and the loading seat 48 are provided with clearance holes 481 for screws to slide, the side plate of the loading seat 48 is provided with a nut positioning block 461, the first axial loading adjusting screw 46 and the nut positioning block 461 keep unchanged in displacement, the first axial loading adjusting screw 46 penetrates through the second joint seat 45 and vertically extends, the backing plate 474 is fixed with an adjusting nut plate 4132, the second axial loading adjusting screw 413 and the adjusting plate 4131 keep unchanged in displacement, and the second axial loading adjusting screw 413 sequentially penetrates through the adjusting plate 4131 and the adjusting nut plate 4132 and vertically extends.
Here, the first joint seat 41 and the second joint seat 45 respectively have T-shaped fixing ends fitted to the corresponding clearance holes 481, and the T-shaped fixing ends can respectively slide in the clearance holes 481 on the side plates of the riser 473 and the loading seat 48.
Two clearance holes 481 are flanked by respective scales 482 that are equally measured.
The hub bearing test unit is fixedly connected with the main shaft 2 through a transition disc 30 and a fixed disc 31 in sequence.
The double-station hub bearing unit working condition simulation testing machine is provided with a fan 51, the fan 51 blows air to the corresponding hub bearing testing unit through an air pipe opening 53, and a wind sensor 52 is arranged at the position close to the air pipe opening 53.
The assembly of the test machine is described below: the test shaft 33, the hub 32 and the hub bearing 34 are assembled together, the inner ring of the test shaft 33 and the inner ring of the hub bearing 34 are locked by a special locking nut 35, the test shaft 33, the hub 32 and the hub bearing 34 are fixedly installed, and then the test hub 32 and the transition disc 30 are connected into a whole.
The loading base 48 is moved sideways to a suitable position, facilitating the adjustment of the arm of force for axial hydraulic loading. Loosening the screws for fastening the T-shaped fixed end of the first joint seat 41 and the adjusting plate 4731 and the screws for fastening the T-shaped fixed end of the second joint seat 45 and the pressing plate, adjusting the first axial loading adjusting screw 46 and the second axial loading adjusting screw 413 to make the whole axial hydraulic loading mechanism move upwards or downwards until the required scale value is adjusted, the reading is the axial hydraulic loading arm of force, and finally locking the screws for fastening the T-shaped fixed end of the first joint seat 41 and the adjusting plate 4731 and the screws for fastening the T-shaped fixed end of the second joint seat 45 and the pressing plate to finish the adjustment of the axial hydraulic loading arm of force.
The hub bearing test unit is lifted by a hydraulic vehicle, the transition disc 30 and the fixed disc 31 are connected and fixed by screws, and finally the loading seat 48 is adjusted to complete the adjustment of the radial stress point.
Claims (10)
1. The utility model provides a duplex position wheel hub bearing unit operating mode analogue test machine which characterized in that: comprises that
The main shaft transmission unit comprises a motor, a transmission belt and a belt wheel which are in transmission connection, the belt wheel is used for driving the main shaft to rotate, the transmission direction of the transmission belt is orthogonal to the axis of the main shaft, and the belt wheel is fixedly sleeved at the center of the main shaft;
the hub bearing test unit comprises a test shaft, a hub bearing and a hub, wherein the left side and the right side of the main shaft are respectively and fixedly connected with the two hub bearing test units;
the loading unit comprises a loading arm, an axial hydraulic loading mechanism and a radial hydraulic loading mechanism, wherein the loading arm is in a seat shape and comprises a back plate, a seat plate, a vertical plate and a base plate which are sequentially and continuously connected, one end of the axial hydraulic loading mechanism is longitudinally and adjustably mounted on the side plate of the loading seat, the other end of the axial hydraulic loading mechanism is longitudinally and adjustably mounted on the vertical plate of the loading arm, one end of the radial hydraulic loading mechanism is fixed on the loading seat, and the other end of the radial hydraulic loading mechanism is fixed on the base plate of the loading arm;
the back plate of the loading arm is provided with a shaft hole, one end of the test shaft is fixed in the shaft hole, the periphery of the other end of the test shaft is provided with a hub bearing, and the outer ring of the hub bearing is provided with a hub driven by a main shaft.
2. The double-station hub bearing unit working condition simulation testing machine according to claim 1, characterized in that: the loading seat is horizontally and adjustably arranged on the bottom plate.
3. The double-station hub bearing unit working condition simulation testing machine according to claim 1 or 2, characterized in that: the radial hydraulic loading mechanism comprises a radial hydraulic cylinder, a radial pressure sensor, a second radial loading head and a first radial loading head which are sequentially connected, the first radial loading head is connected with a base plate of the loading arm, a rolling friction component is arranged between the first radial loading head and the second radial loading head, and the matching surfaces of the rolling friction component and the first radial loading head and the second radial loading head which are contacted with the rolling friction component are in a micro-arc shape.
4. The double-station hub bearing unit working condition simulation testing machine according to claim 3, characterized in that: the axial hydraulic loading mechanism comprises a sensor seat, an axial pressure sensor and an axial hydraulic cylinder which are sequentially connected, the sensor seat is hinged with a first joint seat, the cylinder head of the axial hydraulic cylinder is hinged with a second joint seat, the first joint seat and an adjusting plate are respectively arranged on two sides of a vertical plate and are fixedly connected through screwing of screws, and the second joint seat and a pressing plate are respectively arranged on two sides of a side plate of a loading seat and are fixedly connected through screwing of screws.
5. The double-station hub bearing unit working condition simulation testing machine according to claim 4, characterized in that: the vertical plate and the side plate of the loading seat are provided with clearance holes for screws to slide, the side plate of the loading seat is provided with a nut positioning block, a first axial loading adjusting screw rod and the nut positioning block keep unchanged in displacement, the first axial loading adjusting screw rod penetrates through the second joint seat and vertically extends, an adjusting nut plate is fixed on the base plate, a second axial loading adjusting screw rod and the adjusting plate keep unchanged in displacement, and the second axial loading adjusting screw rod sequentially penetrates through the adjusting plate and the adjusting nut plate and vertically extends.
6. The double-station hub bearing unit working condition simulation testing machine according to claim 5, characterized in that: and corresponding scales with consistent measurement are arranged beside the two clearance holes.
7. The double-station hub bearing unit working condition simulation testing machine according to claim 1, 2, 4, 5 or 6, characterized in that: the hub bearing test unit is fixedly connected with the main shaft through the transition disc and the fixed disc in sequence.
8. The double-station hub bearing unit working condition simulation testing machine according to claim 3, characterized in that: the hub bearing test unit is fixedly connected with the main shaft through the transition disc and the fixed disc in sequence.
9. The double-station hub bearing unit working condition simulation testing machine according to claim 1, 2, 4, 5, 6 or 8, characterized in that: the double-station hub bearing unit working condition simulation testing machine is characterized in that a top plate of the double-station hub bearing unit working condition simulation testing machine is provided with a fan, the fan blows air to the corresponding hub bearing testing units through an air pipe opening, and a wind sensor is arranged on the top plate adjacent to the air pipe opening.
10. The double-station hub bearing unit working condition simulation testing machine according to claim 3, characterized in that: the double-station hub bearing unit working condition simulation testing machine is provided with a fan, the fan blows air to the corresponding hub bearing test units through an air pipe opening, and a wind sensor is arranged at a position adjacent to the air pipe opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110055669.0A CN112763210A (en) | 2021-01-15 | 2021-01-15 | Double-station hub bearing unit working condition simulation testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110055669.0A CN112763210A (en) | 2021-01-15 | 2021-01-15 | Double-station hub bearing unit working condition simulation testing machine |
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| CN112763210A true CN112763210A (en) | 2021-05-07 |
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| CN202110055669.0A Pending CN112763210A (en) | 2021-01-15 | 2021-01-15 | Double-station hub bearing unit working condition simulation testing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486248A (en) * | 2022-01-25 | 2022-05-13 | 方盛车桥（柳州）有限公司 | Fatigue testing machine for axle hub bearing |
| CN116973110A (en) * | 2023-09-20 | 2023-10-31 | 万向钱潮股份公司 | Hub bearing test equipment and loading offset adjustment method |
| CN117030255A (en) * | 2023-08-15 | 2023-11-10 | 洛阳轴承研究所有限公司 | RV reducer main bearing test device |
-
2021
- 2021-01-15 CN CN202110055669.0A patent/CN112763210A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486248A (en) * | 2022-01-25 | 2022-05-13 | 方盛车桥（柳州）有限公司 | Fatigue testing machine for axle hub bearing |
| CN117030255A (en) * | 2023-08-15 | 2023-11-10 | 洛阳轴承研究所有限公司 | RV reducer main bearing test device |
| CN117030255B (en) * | 2023-08-15 | 2024-03-29 | 洛阳轴承研究所有限公司 | RV reducer main bearing test device |
| CN116973110A (en) * | 2023-09-20 | 2023-10-31 | 万向钱潮股份公司 | Hub bearing test equipment and loading offset adjustment method |
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