CN112763210B - 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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- CN112763210B CN112763210B CN202110055669.0A CN202110055669A CN112763210B CN 112763210 B CN112763210 B CN 112763210B CN 202110055669 A CN202110055669 A CN 202110055669A CN 112763210 B CN112763210 B CN 112763210B
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- 238000012360 testing method Methods 0.000 title claims abstract description 70
- 238000004088 simulation Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
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- 238000005259 measurement Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000001228 spectrum Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01M13/04—Bearings
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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 backing 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, and a hub driven by the main shaft is arranged on an outer ring of the hub bearing. The invention adopts the double-end 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 the 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 running process, the heavy truck hub bearing unit not only needs to bear radial load generated by the dead weight of the heavy truck, but also needs to bear positive and negative alternating axial offset load acted on the hub by the ground when the heavy truck turns, and lateral wind blows. In addition, considering actual specific running road conditions and running environments, the rotating speed, load and wind blowing environment of the heavy truck hub bearing unit are not unchanged, and in order to effectively evaluate the service life of the heavy truck hub bearing unit, a heavy truck hub bearing unit working condition simulation test machine needs to be developed, and the comprehensive assessment and evaluation of the service life and reliability of the heavy truck hub bearing unit are realized by simulating running of the heavy truck hub bearing unit under working conditions such as a rotating speed spectrum, a load spectrum, a wind speed spectrum and the like. At present, the structure of simulation test equipment for testing a heavy-duty hub bearing unit is not reasonable, the structure of the equipment is too complex or too crude, and the actual running working condition of the equipment cannot be fully simulated.
In the heavy truck hub bearing testing device with the patent application number of 201910625505.X, through structural arrangement, the hub bearing test is in an upright state, the stress condition of a vehicle in the running process is simulated more truly, and the reliability of the bearing performance test is greatly improved. However, since the axial loading mechanism and the radial loading mechanism which apply 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 and radial loads born by the hub bearing unit are both from the axial and radial acting forces which are on the same point on the bottom of the tire. In addition, because the device is of a single-head cantilever structure, the main shaft bearing needs to bear larger alternating axial load along with the hub bearing test unit, and the service life reliability of the main shaft bearing is greatly reduced. Therefore, further improvements are needed to simulate the actual conditions as much as possible while increasing the useful life of the spindle bearing.
Disclosure of Invention
In view of the above, the invention aims to provide a double-end cantilever structure, which can simulate the actual working condition as far as possible during the test, can reduce the axial load of a main shaft bearing and prolong the service life of the main shaft bearing, and is a double-station hub bearing unit working condition simulation testing machine.
In order to achieve the above object, the invention adopts such a 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, wherein the motor, the transmission belt and the belt wheel 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 arranged on a side plate of the loading seat, the other end of the axial hydraulic loading mechanism is longitudinally and adjustably arranged 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 loading arm comprises a loading arm body, a loading arm is arranged on the loading arm body, a back plate is provided with a shaft hole, one end of the loading arm body is fixed in the shaft hole, a hub bearing is assembled on the periphery of the other end of the testing shaft body, a hub driven by a main shaft is arranged on the outer ring of the hub bearing, 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 assembly is arranged between the first radial loading head and the second radial loading head, the rolling friction assembly and the first radial loading head and the second radial loading head which are contacted with the rolling friction assembly are in a micro-arc shape, 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 the first joint seat, the axial hydraulic cylinder head is hinged with the second joint seat, the first joint seat and an adjusting plate are respectively arranged on two sides of the vertical plate and are fixedly connected with a pressing plate by a screw, and the second joint seat is respectively screwed with the two sides of the pressing plate.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the two hub bearing test units are fixedly connected to the left side and the right side of the main shaft respectively, so that a double-end cantilever is realized, axial pressure applied to the main shaft by the hub bearing test units at the two ends can be mutually offset, the axial force born by the main shaft bearing becomes very small, the main shaft bearing is protected to a 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 test station, the output of the main shaft transmission unit can be used for testing two sets of hub bearings, the test efficiency can be greatly improved, the two sets of hub bearings are provided with independent simulation test mechanisms, and the test processes of the two stations are independent and do not interfere with each other;
3. the axial hydraulic loading mechanism and the radial hydraulic loading mechanism simulate the stress condition of the vehicle in the running process more truly through loading arms and testing the axial hub bearing load, so that the reliability of bearing performance test is greatly improved;
4. The radial hydraulic loading head can smoothly adjust the radial stress point by adopting the low-friction rolling friction assembly, so that the influence of mutual interference of radial load and axial load is avoided.
In particular, the loading seat is horizontally and adjustably mounted on the bottom plate. The loading seat can horizontally adjust the position, so that the hub bearing test unit is convenient to assemble and disassemble, and the radial stress point of the hub bearing test unit is convenient to adjust, so that various stress conditions of the hub bearing are accurately simulated.
Particularly, 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 passes through the second joint seat and vertically extends, the base plate is fixedly provided with an adjusting nut 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 passes 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 arm of the axial force, can be adjusted through the first axial loading adjusting screw and the second axial loading adjusting screw. 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, the sides of the two clearance holes are provided with corresponding scales with consistent measurement. By combining the reading of the scale, the first axial loading adjusting screw and the second axial loading adjusting screw can be ensured to move upwards or downwards by the same distance, and then the level of the test shaft is ensured.
In particular, the hub bearing test unit is fixedly connected with the main shaft through the transition disc and the fixed disc in sequence. Through the arrangement of the structure, the hub bearing test unit and the main shaft can be conveniently connected together.
Particularly, the double-station hub bearing unit working condition simulation tester is provided with a fan, the fan blows air to the hub bearing test units corresponding to the fan through air pipe openings, and a wind sensor is arranged at the position adjacent to the air pipe openings. Through the arrangement of the structure, the wind power environment of the hub bearing test unit can be truly simulated, and the wind power spectrum is simulated 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 a block diagram of an assembly of a spindle and two-end hub bearing test unit in accordance with an embodiment of the present invention;
FIG. 5 is a block diagram of one side hub bearing test unit and its corresponding axial and radial hydraulic loading units in an embodiment of the present invention;
fig. 6 is a perspective view of one of the side axial and radial hydraulic loading units in an embodiment of the invention.
In the figure: 1. a bottom plate; 11. a slide rail; 12. a casting box upper cover; 13. a lower base of the casting box; 2. a main shaft; 21. a labyrinth seal end cap; 23. an end cap; 24. a belt wheel; 25. a motor; 26. a main shaft bearing seat; 27. a spindle bearing; 30. a transition disc; 31. a fixed plate; 32. a hub; 33. a test shaft; 34. a hub bearing; 35. a lock nut; 41. a first joint seat; 42. a sensor mount; 43. an axial pressure sensor; 44. an axial hydraulic cylinder; 45. a second joint seat; 46. a first axial loading adjustment 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 backing plate; 48. a loading seat; 481. a clearance hole; 482. a ruler; 49. a first radial loading head; 410. a radial pressure sensor; 411. a radial hydraulic cylinder; 412. radial loading of the adjusting screw; 413. a second axial loading adjusting screw; 4131. an adjusting plate; 4132. adjusting the nutplate; 414. a rolling friction assembly; 415. a second radial loading head; 51. a blower; 52. a wind sensor; 53. and an air duct opening.
Detailed Description
As shown in FIGS. 1-6, a dual-station hub bearing unit working condition simulation test machine comprises
The main shaft transmission unit comprises a motor 25, a transmission belt and a belt pulley 24 which are in transmission connection, wherein the belt pulley 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 pulley 24 is fixedly sleeved at the center position of the main shaft 2;
the hub bearing test unit comprises a test shaft 33, a hub bearing 34 and a hub 32, wherein 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 base plate 474 which are sequentially and continuously connected, one end of the axial hydraulic loading mechanism is longitudinally and adjustably arranged on a side plate of the loading seat 48, the other end of the axial hydraulic loading mechanism is longitudinally and adjustably arranged 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 base plate 474 of the loading arm 47;
The 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 provided with a hub bearing 34 on the outer periphery thereof, and the outer ring of the hub bearing 34 is provided with a hub 32 driven by the main shaft 2. Thus, the outer race of the hub bearing 34 rotates with the main shaft 2, and the inner race and the test shaft 33 remain 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, and fine adjustment is performed by the structure of the hub bearing test unit, the rotation of the outer race and the stationary inner race of the hub bearing is realized, and further, the operation simulation of the hub bearings of different types of automobiles in the running state is realized.
The pulley 24 sets up main shaft bearing 27 respectively in both sides, and main shaft bearing 27's periphery cover has main shaft bearing frame 26, sets up the spacer ring between main shaft bearing 27 and the pulley 24, and one side of main shaft bearing frame 26 sets up end cover 23, and the opposite side of main shaft bearing frame sets up labyrinth seal end cover 21.
The load seat 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 sequentially connected, the first radial loading head is connected with a base plate of a loading arm, a rolling friction assembly 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 assembly 414, the first radial loading head 49 contacted with the rolling friction assembly 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, the 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 by screw screwing, 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 by screw screwing.
The vertical plate 473 and the side plate of the loading seat 48 are provided with clearance holes 481 for sliding screws, 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 constant in displacement, the first axial loading adjusting screw 46 passes through the second joint seat 45 and vertically extends, the adjusting nut plate 4132 is fixed on the backing plate 474, the second axial loading adjusting screw 413 and the adjusting plate 4131 keep constant in displacement, and the second axial loading adjusting screw 413 sequentially passes through the adjusting plate 4131 and the adjusting nut plate 4132 and vertically extends.
Here, the first and second joint seats 41 and 45 have T-shaped fixing ends respectively fitted to the corresponding clearance holes 481, and the T-shaped fixing ends are slidable in the clearance holes 481 on the side plates of the riser 473 and the load seat 48, respectively.
The sides of the two clearance holes 481 are provided with corresponding scales 482 with consistent measurement.
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 tester is provided with a fan 51, the fan 51 blows air to the respective corresponding hub bearing test units through air nozzles 53, and a wind sensor 52 is arranged at a position adjacent to the air nozzles 53.
The assembly of the testing machine is described as follows: the test shaft 33, the hub 32 and the hub bearing 34 are assembled together, the test shaft 33 and the inner ring of the hub bearing 34 are locked by adopting a special locking nut 35, the fixed installation of the test shaft 33, the hub 32 and the hub bearing 34 is realized, and then the test hub 32 and the transition disc 30 are connected into a whole.
The loading seat 48 is moved sideways into position to facilitate arm adjustment of the axial hydraulic loading. The screws for fastening the T-shaped fixing end of the first joint seat 41 and the adjusting plate 4731, and the screws for fastening the T-shaped fixing end of the second joint seat 45 and the pressing plate are loosened, the first axial loading adjusting screw 46, the second axial loading adjusting screw 413 are adjusted so that the entire axial hydraulic loading mechanism moves upward or downward until being adjusted to a desired scale value, the reading is an axial hydraulic loading arm, and finally the screws for fastening the T-shaped fixing end of the first joint seat 41 and the adjusting plate 4731, and the screws for fastening the T-shaped fixing end of the second joint seat 45 and the pressing plate are locked, thereby completing the adjustment of the axial hydraulic loading arm.
The hub bearing test unit is lifted by the hydraulic vehicle, the transition disc 30 and the fixed disc 31 are fixedly connected by adopting screws, and finally the loading seat 48 is adjusted, so that the adjustment of the radial stress point is completed.
Claims (6)
1. A double-station hub bearing unit working condition simulation testing machine is characterized in that: comprising
The main shaft transmission unit comprises a motor, a transmission belt and a belt wheel, wherein the motor, the transmission belt and the belt wheel 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 arranged on a side plate of the loading seat, the other end of the axial hydraulic loading mechanism is longitudinally and adjustably arranged 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 loading arm comprises a loading arm body, a loading arm is arranged on the loading arm body, a back plate is provided with a shaft hole, one end of the loading arm body is fixed in the shaft hole, a hub bearing is assembled on the periphery of the other end of the testing shaft body, a hub driven by a main shaft is arranged on the outer ring of the hub bearing, 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 assembly is arranged between the first radial loading head and the second radial loading head, the rolling friction assembly and the first radial loading head and the second radial loading head which are contacted with the rolling friction assembly are in a micro-arc shape, 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 the first joint seat, the axial hydraulic cylinder head is hinged with the second joint seat, the first joint seat and an adjusting plate are respectively arranged on two sides of the vertical plate and are fixedly connected with a pressing plate by a screw, and the second joint seat is respectively screwed with the two sides of the pressing plate.
2. The dual-station hub bearing unit operating mode simulation test machine according to claim 1, wherein: the loading seat is horizontally and adjustably arranged on the bottom plate.
3. The double-station hub bearing unit working condition simulation test machine according to claim 1 or 2, wherein: 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 passes through the second joint seat and vertically extends, the base plate is fixedly provided with an adjusting nut 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 passes through the adjusting plate and vertically extends.
4. A dual-station hub bearing unit operating mode simulation test machine according to claim 3, wherein: the sides of the two clearance holes are provided with corresponding scales with consistent measurement.
5. The dual-station hub bearing unit operating mode simulation test machine according to claim 1, wherein: the hub bearing test unit is fixedly connected with the main shaft through the transition disc and the fixed disc in sequence.
6. The dual-station hub bearing unit operating mode simulation test machine according to claim 1, wherein: the 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 hub bearing testing units corresponding to the fan through air pipe openings, and the top plate adjacent to the air pipe openings is provided with a wind sensor.
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| 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 |
| CN114778095B (en) * | 2022-04-20 | 2024-11-26 | 中航试金石检测科技(大厂)有限公司 | A tower internal parts non-welding column testing mechanism |
| 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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| CN214200634U (en) * | 2021-01-15 | 2021-09-14 | 浙江省机电产品质量检测所有限公司 | Double-station hub bearing unit working condition simulation testing machine |
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| CN102410923B (en) * | 2011-08-09 | 2013-12-04 | 西安理工大学 | Rigid and non-linear relation testing device and method of cylindrical fit joint surface |
| CN102778345A (en) * | 2012-02-10 | 2012-11-14 | 青海华鼎实业股份有限公司 | Test device for simulating loading of main shaft of working condition |
| CN104155110B (en) * | 2014-08-25 | 2016-08-24 | 洛阳工铭机电设备有限公司 | Automobile hub bearing periodically dynamic high temperature working condition tests machine |
| CN205280360U (en) * | 2015-11-20 | 2016-06-01 | 洛阳轴研科技股份有限公司 | Bearing testing machine |
| CN107024353A (en) * | 2017-05-11 | 2017-08-08 | 浙江省机电设计研究院有限公司 | A kind of sealed bearings combination property simulation test machine |
| CN206876396U (en) * | 2017-05-11 | 2018-01-12 | 浙江省机电设计研究院有限公司 | Sealed bearing comprehensive performance simulation test machine |
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