CN209802665U - Steering bearing dynamic durability test device - Google Patents

Abstract

the utility model relates to a bearing test technical field specifically discloses a steering bearing developments durability test device. The device at least comprises a test assembly, a deflection assembly, a main driving assembly, an axial loading assembly and a radial loading assembly, wherein the test assembly at least comprises a test shaft and a test seat, the test shaft is used for installing a test bearing, and a test bearing installation cavity is arranged in the test seat. In the embodiment, the axial loading assembly, the radial loading assembly and the deflection assembly are used for simultaneously applying axial load and radial load to the test bearing and enabling the test bearing to generate a deflection angle of the outer ring relative to the inner ring, so that the test bearing is more consistent with the working condition environment of the steering bearing, and the dynamic durability test result is more accurate and reliable; meanwhile, the bearing has the technical advantages of wider applicable bearing range and stronger universality.

Description

Steering bearing dynamic durability test device

Technical Field

the utility model relates to a bearing test technical field, concretely relates to steering bearing developments durability test device.

background

in the prior art, the test devices for testing the dynamic durability of the bearing are very many, but the loading direction of the force of the test bearing is only two dimensions, namely axial loading force and radial loading force. The axial loading force has the effect that the bearing inner ring moves axially relative to the outer ring so as to increase the friction force of the rolling body; the radial loading force has the effect that the bearing outer ring is offset with respect to the inner ring in the direction of the radial loading force in order to increase the friction of the partial rolling bodies.

The common feature of both axial and radial loading is that the bearing outer ring is axially or radially displaced relative to the inner ring, and the centerline of the bearing outer ring and the centerline of the inner ring are always parallel. In actual conditions, some bearings (such as a steering bearing) not only bear radial load and axial load, but also deflect at a certain angle relative to the inner ring, and at the moment, the center line of the outer ring of the bearing is not parallel to the center line of the inner ring, so that the direction of the friction force borne by the rolling bodies is more complicated. The existing bearing dynamic durability test device cannot simulate the working condition, so that the durability test condition of the bearing is inconsistent with the actual working condition, and the reliability of the test result cannot be guaranteed. Therefore, it is necessary to adopt a bearing dynamic durability test device similar to the actual use working condition to test the bearing used under the working condition so as to adapt to the actual working condition of the bearing, so that the test result is more accurate and reliable.

disclosure of Invention

the to-be-solved technical problem of the utility model is to solve among the prior art bearing developments durability test device's operating mode simulation and operating condition disagreement and lead to the technical problem that the reliability of test result can not obtain the guarantee.

Based on the technical problems, one of the technical effects obtained by the embodiment is that the axial loading assembly, the radial loading assembly and the deflection assembly are used for simultaneously applying the axial load and the radial load to the test bearing and enabling the deflection angle of the outer ring of the test bearing relative to the inner ring to be generated, so that the test bearing more conforms to the working condition environment of the steering bearing, and the result of the dynamic durability test is more accurate and reliable.

Based on the technical problems, one of the technical effects obtained by the embodiment is that through the axial loading assembly, the radial loading assembly and the deflection assembly, any one of the axial load, the radial load and the deflection angle, any two of the axial load, the radial load and the deflection angle, or three of the axial load, the radial load and the deflection angle can be selectively applied to the test bearing, and the application working condition range of the applicable bearing is wider, the applicable bearing is basically applicable to dynamic durability tests of most types of bearings, and the dynamic durability test device has the technical advantages of wide application range and strong universality.

based on the technical problems, one of the technical effects achieved by the embodiment is that the radial force of the radial loading assembly is loaded in the radial direction of the test shaft and then is transmitted to the inner ring of the test bearing through the test shaft; the deflection assembly applies a deflection angle to the outer ring of the test bearing through the test seat, so that the action separation of radial loading and angle deflection is realized, and the radial loading and the deflection angle are applied without interference; in the prior art, the radial load is directly applied to the outer ring of the test bearing, so that the structure is not beneficial to realizing the deflection angle.

In order to solve the technical problem, the utility model provides a technical scheme as follows: a steering bearing dynamic durability test device at least comprises:

The test assembly at least comprises a test shaft and a test seat, wherein a test bearing installation cavity is arranged in the test seat, an inner ring of a test bearing to be tested is installed on the test shaft, and an outer ring is installed in the test bearing installation cavity;

the deflection assembly at least comprises a rotating table fixedly connected with the test seat and a rotary driving assembly used for driving the rotating table to rotate, and the rotating axis of the rotating table is intersected with the rotating axis of the test shaft;

The output end of the main driving component is connected with one end of the test shaft and is used for driving the test shaft to rotate or swing in a reciprocating manner;

The axial loading assembly at least comprises an axial loading head and a linear driving assembly for driving the axial loading head to move along the axial direction, and the axial loading head is connected with one end, away from the main driving assembly, of the test shaft;

the radial loading assembly at least comprises a radial loading seat and a linear driving assembly used for driving the radial loading seat to apply radial pressure on the test shaft.

according to the preferred embodiment, the test shaft is provided with two test bearing mounting positions, at least one test-accompanying bearing is arranged between the test bearing mounting positions, a lining seat is mounted outside the test-accompanying bearing, and the lining seat is fixedly connected with the radial loading seat.

The utility model provides a preferred embodiment, be equipped with the cavity seat between revolving stage and the test bench, the cavity seat is including mutually supporting and can dismantle cavity base and the cavity lid of connection, cavity base and revolving stage fixed connection, form the cavity that is used for holding the test bench between cavity lid and the cavity base.

In a preferred embodiment, the deflection assembly further includes a base and a central shaft fixedly connected to the base, the rotation driving assembly includes a driven driving member rotatably engaged with the central shaft and a driving mechanism for driving the driven driving member to rotate, and the driven driving member is fixedly connected to the rotating table.

In a preferred embodiment, the main driving assembly comprises at least a main driving motor and a translation mechanism for driving the main driving motor to move along the axial direction of the test shaft, and a torque sensor is arranged between an output shaft of the main driving motor and the test shaft.

According to the preferred embodiment, the translation mechanism at least comprises a linear guide rail seat and a linear guide rail platform which are matched with each other, the main driving motor and the torque sensor are installed on the linear guide rail platform, and a translation driving mechanism is arranged between the linear guide rail seat and the linear guide rail platform.

In a preferred embodiment, the linear drive assembly comprises at least:

The electric cylinder base shell is fixedly arranged;

the lead screw sheath is positioned in the electric cylinder base shell and is axially and movably connected with the electric cylinder base shell, and one end of the lead screw sheath is connected with a lead screw nut;

the bearing sleeve is fixedly connected with one end of the electric cylinder base shell;

The screw rod is connected with the bearing seat through a bearing, the screw rod is matched with a screw rod nut, and one end of the screw rod, which is far away from the screw rod nut, is connected with a power mechanism for driving the screw rod to rotate;

And the force sensor is arranged at one end, far away from the screw rod nut, of the screw rod sheath.

in a preferred embodiment, a limiting mechanism is arranged between the screw rod sheath and the electric cylinder base shell.

In a preferred embodiment, the axial loading assembly further comprises a motion separation mechanism disposed between the linear drive assembly and the axial loading head, the motion separation mechanism comprising:

The linear bearing sleeve is fixedly arranged;

The transition seat is fixedly connected with the axial loading head;

The transition shaft at least comprises a sensor connecting end fixedly connected with the force sensor, a bearing connecting end connected with the transition seat through a bearing, and a linear bearing section which penetrates through the linear bearing sleeve and is axially and movably connected with the linear bearing sleeve.

according to a preferred embodiment, the radial loading assembly further comprises a linear bearing sleeve fixedly arranged and a sliding rod movably connected with the linear bearing sleeve in the axial direction, one end of the sliding rod is fixedly connected with the force sensor, and the other end of the sliding rod is fixedly connected with the radial loading seat or integrally connected with the radial loading seat.

Drawings

FIG. 1 is a schematic external structural view of a dynamic durability testing apparatus for a steering bearing according to the present embodiment;

FIG. 2 is a schematic structural diagram of a test assembly in the dynamic durability test apparatus for a steering bearing according to the present embodiment;

FIG. 3 is a cross-sectional view of the trial assembly of FIG. 2;

FIG. 4 is a schematic diagram of the construction of the test shaft of the test assembly of FIG. 2;

FIG. 5 is a schematic diagram of the test socket of the test assembly of FIG. 2;

FIG. 6 is a cross-sectional view of the test socket shown in FIG. 5;

FIG. 7 is a schematic diagram illustrating an assembly structure of a test assembly, a lining seat and a cavity seat in the dynamic durability test apparatus for a steering bearing of the present embodiment;

FIG. 8 is a cross-sectional view of the assembled structure of FIG. 7;

FIG. 9 is a schematic view of the assembled structure and deflection assembly of FIG. 7;

FIG. 10 is a schematic structural diagram of a deflection assembly in the dynamic durability testing apparatus for a steering bearing according to the present embodiment;

FIG. 11 is a schematic view of the deflection assembly of FIG. 10 in an exploded condition;

FIG. 12 is a schematic structural diagram of a main driving assembly in the dynamic durability testing apparatus for a steering bearing according to the present embodiment;

FIG. 13 is a schematic view of the main drive assembly of FIG. 12;

FIG. 14 is a schematic external view of a radial loading assembly in the dynamic durability testing apparatus for a steering bearing according to the present embodiment;

FIG. 15 is a cross-sectional view of the radial loading assembly of FIG. 14;

FIG. 16 is a schematic external structural view of an axial loading assembly in the dynamic durability testing apparatus for a steering bearing according to the present embodiment;

FIG. 17 is a cross-sectional view of the axial loading assembly of FIG. 16;

FIG. 18 is a partial state view in cross-section of the axial loading assembly of FIG. 17.

Detailed Description

in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

as shown in fig. 1, the dynamic durability test apparatus for a steering bearing of the present embodiment includes a frame member 900, and components such as a control box and a distribution box are mounted inside the frame member 900. In this embodiment, the upper portion of the frame member 900 is provided with an interactive device 800, and the interactive device 800 is provided with a display device for displaying various parameters generated in the test process of the test bearing, input control parameters and the like; the interaction means 800 should also have an input module, such as a keyboard, a touch input module, etc., for inputting information such as control parameters of the test bearings.

As shown in fig. 1, in the steering bearing dynamic durability test apparatus of the present embodiment, a test member 100 is mounted on a deflection member 300 through a cavity mount. The test assembly 100 is provided with two test bearings, the two test bearings correspond to the two test seats, and the two test seats are respectively arranged in the two cavity seats. The two cavity mounts are respectively mounted on the two deflection assemblies 300, and the deflection assemblies 300 are fixedly mounted on the frame member 900.

As shown in FIG. 1, in this embodiment, the test assembly 100 is connected to the main drive assembly 500 at one end and to the axial loading assembly 600 at the other end. Mounted on the test assembly 100 between the two test seats is a bushing 400 to which is attached a radial loading assembly 700. The results of the trial assembly 100, the main drive assembly 500, the axial loading assembly 600, the radial loading assembly 700, and the yaw assembly 300 will be described in detail below.

As shown in fig. 2-4, in the present embodiment, the test assembly 100 includes a test shaft 110, a test socket 150, a test-assisting bearing 130, and the like. Specifically, the structure of the test shaft 110 is as shown in fig. 4, the test shaft 110 is a structure with symmetrical left and right ends, and includes a middle section 111, test bearing sections 112 respectively located at two sides of the middle section 111, and a test bearing section 113 extending from one end of the test bearing section 112 away from the middle section 111, wherein free ends of the test bearing sections 113 at two sides are respectively connected to the axial loading connection end 116 and the main driving connection end 117.

In the above-described structure of the test shaft 110, in which the diameter of the intermediate section 111 is larger than that of the test-accompanying bearing section 112, the first step surface 114 is formed at the position where the intermediate section 111 is connected to the test-accompanying bearing section 112. The diameter of the test bearing segment 112 is larger than that of the test bearing segment 113, and a second step surface 115 is formed at the position where the test bearing segment 112 is connected with the test bearing segment 113.

As shown in fig. 2 and fig. 3, in the present embodiment, the trial bearing 130 and the dismounting ring 120 are mounted on the trial bearing segment 112, wherein one end of the dismounting ring 120 abuts against the first step surface 114, and the other end abuts against the inner ring of the trial bearing 130. Wherein the function of the stripper ring 120 is to facilitate the removal of the relevant mounting components on the test shaft, such as the test-aid bearing 130, after the test has been completed. Under the general condition, the external diameter of dismantling ring 120 is greater than the external diameter of interlude 111, and the dismantlement formula, with the help of supplementary dismantlement part, from the position of interlude 111 act on the terminal surface that the dismantlement ring is close to the interlude, can be convenient will accompany the examination bearing and dismantle down, also can not damage and accompany the examination bearing.

in the present embodiment, as shown in fig. 2 and 3, a spacer ring 140, a test bearing 180, a spacer sleeve 160 and a locking member 170 are respectively installed on the test bearing segment 113. Wherein, one end of the isolating ring 140 is abutted against the inner ring of the test bearing 130, and the other end is abutted against the inner ring of the test bearing 180. One end of the isolating sleeve 160 abuts against the inner ring of the test bearing 180 on the side away from the isolating ring 140, and the other end abuts against the locking member 170. The retaining member 170 is fixedly connected to the test bearing segment 113 to fix the spacer sleeve 160, the test bearing 180, the spacer ring 140, the test bearing 130 and the dismounting ring 120 to the test shaft 110. The locking member 170 may be a locking nut, may be fixedly connected to the test shaft via a screw, or may be a commonly used shaft end locking structure in other forms of the prior art.

As shown in fig. 2 and 3, in the present embodiment, a test socket 150 is mounted on the periphery of a test bearing 180, and the test socket 150 has a structure as shown in fig. 5 and 6, and stepped holes are formed in the test socket, wherein the stepped holes include a test bearing mounting cavity 153 with a smaller diameter and a large diameter cavity 151 with a larger diameter. The inner diameter of the test bearing installation cavity 153 is adapted to the outer diameter of the test bearing 180, and the cavity bottom of the large-diameter cavity 151 is provided with an annular cavity 154. Wherein, a cavity wall 155 is formed between the annular cavity 154 and the test bearing installation cavity 153, and the axial length of the cavity wall 155 is not smaller than the width of the test bearing 180.

In the structure, a cavity wall 155 is formed by the large-diameter cavity 151, the test bearing installation cavity 153 and the annular cavity 154, and the test bearing 180 is installed in the test bearing installation cavity 153 where the cavity wall 155 is located, so that the wall thickness of the bearing installation position in the actual working condition is simulated by the cavity wall 155, the test condition more consistent with the actual working condition is expected, and a more reliable test result is obtained.

in this embodiment, the major diameter cavity faces to the side of the bearing for test, and of course, the installation can be performed reversely, that is, the major diameter cavity is located at the side far away from the bearing for test.

In the present embodiment, as shown in fig. 3-6, the annular cavity 154 is provided with a sensor mounting hole 152 radially penetrating to the outside of the test socket, and the sensor mounting hole 152 is used for mounting a temperature sensor 430 for monitoring the temperature during the test of the test bearing in real time.

in the present embodiment, as shown in fig. 7 and 8, the bearing adapter 400 is further provided to be mounted on the outer side of the test-attached bearing 130. The bushing 400 is provided with a test-accompanying bearing installation cavity 410 for accommodating a pair of test-accompanying bearings 130, and a sensor installation hole is formed in the position, in the test-accompanying bearing installation cavity 410, of the test-accompanying bearing 130, and is used for installing a temperature sensor 430 so as to monitor the temperature of the test-accompanying bearing 130 in the operation process at any time.

In this embodiment, as shown in fig. 7-9, a chamber mount 200 for supporting a test assembly is provided on the deflection assembly 300 in order to facilitate mounting of the test assembly. Wherein the cavity base 200 comprises a cavity base and a cavity cover 230. Wherein the chamber base comprises a base 210 connected to the deflection assembly and a support 220 provided on the base 210. The seat 220 and the chamber cover 230 form a chamber for receiving the test socket 150. Typically, the chamber cover 230 and the support 220 are detachably connected by bolts. During installation, the chamber cover 230 is first removed, the test assembly is placed on the pedestal 220, and the chamber cover is then fastened to the pedestal and fastened with bolts. After the test is completed, the cavity cover is firstly detached in the detaching process, and then the test assembly is taken out. The advantage that so set up lies in, dismantles and simple to operate, and the used repeatedly of being convenient for still can realize not unidimensional or type bearing's experiment through the test subassembly of changing different specifications.

in this embodiment, a connecting plate 420 is disposed between the pair of cavity covers to connect the pair of cavity bases as a whole, wherein the temperature sensors of the test bearings and the accompanying bearings pass through the connecting plate 420. In addition, the vibration sensor 440 is connected to the cavity seat and the lining seat in this embodiment, so as to monitor the vibration of the test bearing and the accompanying bearing at any time.

In this embodiment, the deflecting assembly 300 is constructed as shown in fig. 10 and 11, and includes a base 320 and a middle shaft 340 fixedly connected to the base 320, wherein the base 320 is fixedly connected to the frame member 900. In this embodiment, the middle shaft 340 is sleeved with a driven driving member 350 connected with the middle shaft in a rotating fit manner, and a rolling body 360 or a bearing is disposed between the driven driving member 350 and the middle shaft 340.

Preferably, in the present embodiment, the driven driver 350 is a turbine, and the driving mechanism engaged with the turbine includes a worm 370 engaged with the turbine and a power component for driving the worm 370 to rotate. The scroll rod 370 is disposed in the scroll rod protection case 321, and the scroll rod protection case 321 is fixedly connected to the base 320. Preferably, in this embodiment, the power unit is a hand wheel 380, and the hand wheel 380 is manually driven to rotate. Of course, the power component may also be a motor type power component for automatically driving the scroll to rotate.

It should be noted that the driven drive member may also be a gear or other type of member. The driven driving member and the driving mechanism constitute the rotary driving assembly of this embodiment.

In this embodiment, the upper end surface of the driven driving member is connected to a rotating table 310, and the rotating table 310 is fixedly connected to the cavity base. The rotating axis of the rotating table is intersected with the rotating axis of the test shaft and passes through the center of the test bearing, including plane intersection and three-dimensional intersection, so that the relative deflection of the outer ring and the inner ring of the test bearing is realized.

preferably, in the present embodiment, a dial 330 is further provided between the rotary table 310 and the driven driver 350. As shown in fig. 9, a marking arrow 212 is disposed on the base 210, a display area 213 is disposed on the base 320, and the scale values on the scale 330 are accurately read through the marking arrow 212 and the display area 213, so as to obtain an accurate rotation angle of the turntable during the deflection process, thereby determining the deflection angle between the outer ring and the inner ring of the test bearing.

In this embodiment, an arc-shaped hole 211 is further disposed on the base 210, and the base 210 is connected to the base 320 through the arc-shaped hole 211 by a connection bolt 214. The purpose of this arrangement is that the arc length of the arcuate aperture 211 defines the limit swing angle of the base 210 to prevent excessive deflection from jamming the test bearing.

As shown in fig. 13 and 14, the main drive assembly 500 in this embodiment includes a main drive motor 530 and a translation mechanism for driving the main drive motor 530 to move along the axial direction of the test shaft. The translation mechanism includes a linear guide rail seat 510 fixedly disposed on the frame member 900 and a linear guide rail platform 520 slidably connected to a guide rail on the linear guide rail seat in a matching manner. The linear guide rail platform 520 is provided with a screw nut seat 521, and the linear guide rail seat 510 is connected with a screw 522 matched with the screw nut seat 521 and a driving mechanism for driving the screw 522 to rotate. Preferably, in this embodiment, the driving mechanism is a rotating handle 523. Of course, the driving mechanism may have other configurations or may be an automated driving device such as a motor.

In this embodiment, the main driving motor 530 is fixedly installed on the motor support 531, the motor support 531 is fixedly connected to the linear guide platform 520, the motor support frames 540 fixedly connected to the frame member 900 are disposed on two sides of the linear guide base 510, and a limiting device is disposed between the motor support 531 and the motor support frames 540. Preferably, the limiting device in this embodiment includes a limiting long hole 532 disposed on the motor support 531, a bolt hole 541 is disposed on the motor support frame 540, and the motor support 531 and the motor support frame 540 are connected by a bolt passing through the limiting long hole 532 and engaging with the bolt hole 541. The limit long hole 532 is used for limiting the limit position of the translation of the main driving motor 530.

As shown in fig. 13, in the present embodiment, a torque sensor 550 is disposed between the output shaft of the main drive motor 530 and the main drive connection end 117 of the test shaft, and both ends of the torque sensor 550 are connected to the output shaft of the main drive motor 530 and the main drive connection end 117 respectively through a coupling 560. In this embodiment, the torque sensor 550 is fixedly connected to the linear guide platform 520 through the sensor bracket 551.

As shown in fig. 14 and 15, the radial loading assembly 700 in this embodiment includes a radial loading seat 710 fixedly connected to the liner seat 400, a fixedly disposed linear bearing sleeve 721, and a sliding rod 720 axially movably connected to the linear bearing sleeve 721, wherein one end of the sliding rod 720 is fixedly connected to the radial loading seat or integrally formed with the radial loading seat.

in this embodiment, the radial loading assembly 700 includes a fixing frame 730 fixedly connected to the frame member 900, a transverse support 731 is fixedly connected to a side of the fixing frame 730 close to the radial loading seat, and the linear bearing sleeve 721 is fixedly connected to the transverse support 731.

In this embodiment, the radial loading assembly 700 further comprises a linear driving assembly, a screw 760 of the linear driving assembly and a screw sheath 761, wherein a screw nut 762 cooperating with the screw 760 is fixedly connected to the screw sheath 761.

In this embodiment, the lead screw 760 is rotatably and movably connected to the bearing sleeve 733 through the bearing 735, wherein the bearing sleeve 733 is fixedly connected to the fixing frame 730 through the electric cylinder base housing 732 sleeved outside the lead screw sheath 761. Wherein the lead screw sheath 761 is axially movably connected in the electric cylinder block housing 732.

In this embodiment, a force sensor 740 is connected between an end of the screw rod sheath 761 away from the bearing sleeve and an end of the sliding rod 720 away from the loading seat.

In this embodiment, the power unit for driving the screw rod to rotate includes a screw rod motor 750 and a speed reducer 751, wherein an output end of the speed reducer 751 is connected to an end of the screw rod through a screw rod coupling 752. Wherein, the reducer and the lead screw motor are fixedly connected with the bearing sleeve and the electric cylinder base shell through a flange base 734.

In this embodiment, a guide sliding member and a position limiting member are provided between the screw rod protector 761 and the electric cylinder block housing 732. The guiding sliding component comprises an axially extending guiding sliding groove 736 arranged on the cylinder base housing 732 and a rolling body 737 matched with the guiding sliding groove 736, and the rolling body 737 is fixedly connected with the screw rod sheath. Preferably, the rolling elements in this embodiment are bearings.

In this embodiment, the limiting component includes an axially extending long groove 738 disposed on the cylinder base housing 732, two ends of the long groove 738 are provided with a trigger switch 739, a limiting sheet 764 fixedly connected with the lead screw sheath is disposed in the long groove, and after the limiting sheet 764 contacts with the trigger switch, the stop of the lead screw motor can be controlled by a signal, so as to realize the limit position of radial force loading.

In the structure, the linear driving mechanism drives the radial loading seat to apply pressure to the lining seat, and the pressure is transmitted to the test assembly through the test-accompanying bearing to form the radial loading force of the test bearing. Also, the radial loading force may be monitored and fed back by a force sensor. The device has the technical advantages of simple structure and real-time monitoring and setting of radial loading force.

As shown in fig. 16-18, axial loading assembly 60, in this embodiment, includes an axial loading head 610 and a linear drive assembly for driving the axial loading head in an axial direction. The axial loading head 610 is fixedly connected with the axial loading connecting end 116 of the test shaft through a locking connecting member 630.

in the embodiment, the linear driving assembly has the same structure as that of the linear driving assembly in the radial loading assembly, and also includes components such as an electric cylinder base housing, a lead screw sheath, a bearing sleeve, a lead screw, a force sensor, a speed reducer, a lead screw motor, and the like, which will not be described in detail herein. Of course, the linear drive assembly of the axial loading member may also have a different configuration than the linear drive assembly of the radial loading assembly.

It should be particularly noted that, as shown in fig. 18, in the axial loading assembly, a motion separation mechanism is disposed between the linear driving assembly and the axial loading head, and the motion separation mechanism includes a transition shaft 640, where the transition shaft 640 includes a sensor connection end fixedly connected to the force sensor, a linear bearing segment 642 axially movably connected to the linear bearing sleeve 721, and a bearing connection end 641, where the bearing connection end 641 is rotatably movably connected to the transition seat 620 through a separation bearing 643, and the transition seat 620 is fixedly connected to the axial loading head 620. Wherein, the end of the transition shaft is provided with a lock nut 645, and a sleeve 644 is arranged between the lock nut and the release bearing.

The motion separation mechanism has the function of separating the linear motion of the linear driving assembly from the rotation or swing motion of the test shaft so as to ensure that the transition shaft does not rotate but can drive the axial loading head to realize motion and apply axial loading force while the axial loading head rotates or swings along with the test shaft, and the motions of the transition shaft and the axial loading head are not interfered with each other.

In the axial loading assembly of the embodiment, the axial loading force can be monitored and fed back through the force sensor, and the axial loading assembly has the technical advantages of accurate loading and more practical working condition simulation.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. A steering bearing dynamic durability test device is characterized by at least comprising:

the test assembly at least comprises a test shaft and a test seat, wherein the test shaft is used for mounting a test bearing, and a test bearing mounting cavity is arranged in the test seat;

the deflection assembly at least comprises a rotating table fixedly connected with the test seat and a rotary driving assembly used for driving the rotating table to rotate, and the rotating axis of the rotating table is intersected with the rotating axis of the test shaft;

The output end of the main driving component is connected with one end of the test shaft and is used for driving the test shaft to rotate or swing in a reciprocating manner;

The axial loading assembly at least comprises an axial loading head and a linear driving assembly for driving the axial loading head to move along the axial direction, and the axial loading head is connected with one end, away from the main driving assembly, of the test shaft;

The radial loading assembly at least comprises a radial loading seat and a linear driving assembly used for driving the radial loading seat to apply radial force to the test bearing.

2. The steering bearing dynamic durability test device according to claim 1, wherein the test shaft is provided with two test bearing mounting positions, at least one test-accompanying bearing is arranged between the test bearing mounting positions, a lining seat is mounted outside the test-accompanying bearing, and the lining seat is fixedly connected with the radial loading seat.

3. The steering bearing dynamic durability test device according to claim 1, wherein a cavity base is arranged between the rotating platform and the test base, the cavity base comprises a cavity base and a cavity cover which are mutually matched and detachably connected, the cavity base is fixedly connected with the rotating platform, and a cavity for accommodating the test base is formed between the cavity cover and the cavity base.

4. The dynamic durability test device for the steering bearing according to claim 1 or 3, wherein the deflection assembly further comprises a base and a middle shaft fixedly connected with the base, the rotary driving assembly comprises a driven driving member rotatably matched with the middle shaft and a driving mechanism for driving the driven driving member to rotate, and the driven driving member is fixedly connected with the rotary table.

5. the steering bearing dynamic durability test device according to claim 1, wherein the main drive assembly at least comprises a main drive motor and a translation mechanism for driving the main drive motor to move along the axial direction of the test shaft, and a torque sensor is arranged between an output shaft of the main drive motor and the test shaft.

6. The steering bearing dynamic durability test device according to claim 5, wherein the translation mechanism comprises at least a linear guide rail seat and a linear guide rail platform which are matched with each other, the main drive motor and the torque sensor are arranged on the linear guide rail platform, and a translation drive mechanism is arranged between the linear guide rail seat and the linear guide rail platform.

7. The steering bearing dynamic durability test apparatus according to claim 1, wherein the linear drive assembly comprises at least:

the electric cylinder base shell is fixedly arranged;

The lead screw sheath is positioned in the electric cylinder base shell and is axially and movably connected with the electric cylinder base shell, and one end of the lead screw sheath is connected with a lead screw nut;

The bearing sleeve is fixedly connected with one end of the electric cylinder base shell;

the screw rod is connected with the bearing seat through a bearing, the screw rod is matched with a screw rod nut, and one end of the screw rod, which is far away from the screw rod nut, is connected with a power mechanism for driving the screw rod to rotate;

and the force sensor is arranged at one end, far away from the screw rod nut, of the screw rod sheath.

8. The steering bearing dynamic durability test device according to claim 7, wherein a limiting mechanism is arranged between the screw rod sheath and the electric cylinder base shell.

9. The steering bearing dynamic durability test apparatus according to claim 7 or 8, wherein the axial loading assembly further comprises a motion separation mechanism provided between the linear drive assembly and the axial loading head, the motion separation mechanism comprising:

The linear bearing sleeve is fixedly arranged;

the transition seat is fixedly connected with the axial loading head;

the transition shaft at least comprises a sensor connecting end fixedly connected with the force sensor, a bearing connecting end connected with the transition seat through a bearing, and a linear bearing section which penetrates through the linear bearing sleeve and is axially and movably connected with the linear bearing sleeve.

10. the dynamic durability test device for the steering bearing according to claim 7 or 8, wherein the radial loading assembly further comprises a fixedly arranged linear bearing sleeve and a sliding rod which is axially movably connected with respect to the linear bearing sleeve, one end of the sliding rod is fixedly connected with the force sensor, and the other end of the sliding rod is fixedly connected with the radial loading seat or integrally connected with the radial loading seat.