CN109839273B - Rod end bearing limit temperature test fixture and test method thereof - Google Patents

Abstract

The invention relates to a rod end bearing extreme temperature test fixture and a test method thereof, and the rod end bearing extreme temperature test fixture comprises a fixed platform, an adapter, a base, a box penetrating connecting shaft, a plastic sleeve, a motor shaft, a coupler, a fixture connecting shaft and a retainer ring, wherein the adapter is arranged on the base; the fixture connecting shaft is provided with a groove, the box penetrating connecting shaft is provided with a connecting shaft shoulder, the box penetrating connecting shaft penetrates through the temperature test box and is connected with the motor through the coupler, and the box penetrating connecting shaft penetrates through the temperature test box through the plastic sleeve. The clamp disclosed by the invention is simple in structure and convenient to disassemble, shortens the time of installation preparation, and improves the use efficiency of equipment.

Description

Rod end bearing limit temperature test fixture and test method thereof

Technical Field

The invention belongs to the field of testing mechanical equipment, and particularly relates to a rod end bearing extreme temperature test clamp and a test method thereof.

Background

The limit temperature test is one of important qualification test items of a series of rod end rolling bearings such as an aviation rod end double-row roller bearing. Taking an aviation rod end double-row roller bearing as an example, the extreme temperature test of the bearing is carried out according to the relevant requirements of the general specification of the bearing: the bearing to be tested is placed in an environment with the lowest use temperature of-55 ℃, is rotated for 100 hours at the speed of 3r/min +/-1 r/min, is adjusted to 121 ℃, and is operated for 100 hours. The test platform can meet the basic requirements of the tests, and can also meet the requirements of relevant temperature rotation test conditions in a wider range by adjusting the temperature of the temperature box and the rotating speed of the test motor.

The existing extreme temperature test platform is poor in design universality and cannot realize sharing of multiple types of bearings, so that test clamps are required to be frequently replaced when the extreme temperature tests of the bearings of different types are finished, the tests are finished by the clamps of various specifications, and the huge waste of funds, time and resources is caused; in addition, in the existing extreme temperature test device, the centers of the transmission rod and the bearing inner ring are not easy to be centered, so that the problem of eccentricity is easy to occur, the bearing inner ring can bear additional radial force due to the eccentricity, the service life of the bearing is reduced, and the accuracy of a test result is seriously influenced; the rod end bearing is difficult to install fixedly, and when test equipment installs, anchor clamps are difficult for guaranteeing to the heart, simultaneously because the problem such as test anchor clamps are heavy, temperature incasement space is limited, when driving motor passed the temperature tank wall and is connected with the incasement bearing, the installation is loaded down with trivial details hard relatively, and easily causes the interference between each part of test anchor clamps, prolongs experimental preparation time by a wide margin.

Disclosure of Invention

Aiming at the situation, the invention provides a rod end bearing extreme temperature test fixture, which overcomes the defects of the prior art, improves the universality of the test fixture, accelerates the mounting and dismounting speed, ensures good centering property, can ensure the accuracy of a test result and has strong practicability by improving and optimizing the fixture structure.

The technical scheme adopted by the invention is to provide a rod end bearing extreme temperature test fixture which comprises a fixed table, an adapter seat, a base, a box-passing connecting shaft, a plastic sleeve, a motor shaft, a coupler, a fixture connecting shaft and a retainer ring, wherein two groups of threaded holes are arranged on the fixed table, each group of threaded holes are uniformly distributed on two concentric circles, a plate body of the fixed table is fixedly connected onto a bottom plate of the temperature test box by a screw penetrating through a first threaded hole group, a third threaded hole group, a fourth threaded hole group and an adapter seat mounting hole are arranged on the base, the base is fixedly connected onto the fixed table by a screw penetrating through the third threaded hole group and the second threaded hole group, a plurality of threaded holes are uniformly arranged in the circumferential direction of the adapter seat, the adapter seat is mounted in the adapter seat mounting hole, and the screw penetrates through the fourth threaded hole group and is connected with the threaded holes on the adapter seat, fixedly connecting the adapter on the base; the fixture connecting shaft comprises a bearing mounting shaft section, a shaft shoulder, a connecting shaft body, a groove and a connecting shaft threaded hole group, the shaft shoulder is arranged in the center of the first end of the connecting shaft body, the bearing mounting shaft section is arranged in the center of the first end of the shaft shoulder, the groove is arranged in the center of the second end of the connecting shaft body, a plurality of threaded holes are uniformly formed in the groove wall of the groove to form the connecting shaft threaded hole group, the box penetrating connecting shaft comprises a connecting shaft shoulder arranged at the first end of the box penetrating connecting shaft body and a first flange arranged at the second end, the plastic sleeve is arranged in a plastic sleeve mounting hole on the temperature test box, the box penetrating connecting shaft body is arranged in the plastic sleeve mounting hole, the connecting shaft shoulder is arranged in the groove of the fixture connecting shaft, and a screw penetrates through the connecting shaft threaded hole group to be connected with a connecting shaft shoulder threaded hole uniformly arranged on the circumference of the connecting, and the fixture connecting shaft and the box penetrating connecting shaft are fixedly connected together, a second flange is arranged at the first end of the motor shaft, the first flange and the second flange are fixedly connected together through the coupler, and the second end of the motor shaft is fixedly connected with the output shaft of the motor.

The motor is fixed on a motor fixing platform, a roller is installed below the motor fixing platform, the roller is installed above a roller path, a manual lead screw is installed between the second end of the motor fixing platform and a rack and can axially move within a certain range, the manual lead screw is driven by manpower and is provided with a mechanical lock, the motor is connected with a motor controller through a cable, the motor controller sends an instruction to control the rotating speed, the steering speed and the running time of the motor, the temperature test box is connected with a temperature box controller through a cable and sends an instruction to control the temperature value, the temperature change speed and the heat preservation time in the temperature test box; and during testing, the tested bearing is connected with the inner threaded hole of the adapter through the outer thread of the rod end of the tested bearing, the inner ring of the tested bearing is arranged on the bearing mounting shaft section at the first end of the clamp connecting shaft, the center of the retainer ring is provided with a through hole, a screw penetrates through the through hole of the retainer ring and is connected with a threaded hole arranged in the center of the first end of the clamp connecting shaft, the retainer ring and a shaft shoulder on the clamp connecting shaft clamp the tested bearing together, and the shaft shoulder is driven by the motor through a shaft system, so that the rotation of the inner ring of the tested bearing is realized.

Preferably, the base includes the base body, third screw thread punch combination, fourth screw thread punch combination and switching seat mounting hole, base body central authorities are equipped with the through-hole, the section of base is child style of calligraphy, third screw thread punch combination is located on the wing limit of the base body, including a plurality of screw holes of even setting, fourth screw thread punch combination is along evenly locating the second end of the base body.

Preferably, the adapter is provided as a hollow body, and the adapter bore is tapped with an internal thread.

Preferably, after the tested bearing is installed, the axis of the rod end shaft of the tested bearing is parallel to the central axes of the base and the adapter, and the axis of the bearing inner ring of the tested bearing is parallel to the central axes of the clamp connecting shaft and the box penetrating connecting shaft.

Preferably, the test clamp parts in the temperature test chamber are made of stainless steel materials.

Preferably, cotton yarn is wound between the plastic sleeve and the box penetrating connecting shaft.

In another aspect of the present invention, a testing method based on the rod end bearing limit temperature testing fixture is provided, which includes the following steps:

s1: before the test is started, the adapter, the clamp connecting shaft and the check ring are not installed;

s2: screwing the rod end thread of the tested bearing into the internal thread hole of the adapter;

s3: mounting the inner ring of the tested bearing to a bearing mounting shaft section of the clamp connecting shaft;

s4: the retainer ring is installed in a threaded hole at the first end of the clamp connecting shaft through a screw, and the retainer ring and a shaft shoulder on the clamp connecting shaft clamp the tested bearing;

s5: installing the adapter on the base, adjusting the exposed height of the rod end of the tested bearing, and adjusting the manual lead screw to enable the tested bearing to move axially;

s6: mounting the groove at the second end of the clamp connecting shaft on a connecting shaft shoulder at the first end of the box penetrating connecting shaft;

s7: and after debugging is finished, turning on the power supplies of the motor controller and the temperature box controller and the power supply of the motor for testing.

Compared with the prior art, the invention has the following advantages:

1. the invention has strong universality, and can realize that rolling bearings of different models can finish extreme temperature tests according to standard requirements by simply replacing the blocking piece and the thread adapter, thereby saving the fund and the storage space of the clamp;

2. the invention has good functionality, the centering performance of the tested bearing is easy to be ensured in the installation process, and the precision and the accuracy of the test result are well ensured;

3. the invention has simple structure and light weight, does not generate interference among clamp parts in the operation process, is convenient for installing and disassembling the bearing to be tested in the narrow space of the temperature box, shortens the time of test interval and improves the use efficiency of equipment;

4. the invention has high reliability level, the temperature box and the rotating motor have certain degree of automation, the test temperature and the rotating speed can be automatically adjusted in the test process, the invention has the functions of automatic alarm and automatic power off, and the patrol frequency is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of the testing apparatus of the present invention; and

FIG. 2 is a flow chart of the working method of the present invention.

The main reference numbers are as follows:

1-a temperature test box, 2-a fixed table, 3-an adapter, 4-a base, 5-a box penetrating connecting shaft, 6-a plastic sleeve, 7-a motor shaft, 8-a coupler, 9-a clamp connecting shaft, 10-a tested bearing, 11-a retainer ring, 12-a motor, 13-a motor controller, 14-a temperature box controller, 15-a motor fixed platform, 16-a roller, 17-a roller path, 18-a manual screw, 19-a mechanical lock and 20-a rack.

Detailed Description

The technical contents, structural features, attained objects and effects of the present invention are explained in detail below with reference to the accompanying drawings.

The invention provides a rod end bearing extreme temperature test fixture, as shown in figure 1, which comprises a fixed platform 2, an adapter seat 3, a base 4, a box-through connecting shaft 5, a plastic sleeve 6, a motor shaft 7, a coupler 8, a fixture connecting shaft 9 and a retainer ring 11, wherein two groups of threaded holes are arranged on the fixed platform 2, each group of threaded holes are uniformly distributed on two concentric circles, a plate body 21 of the fixed platform 2 is fixedly connected on a bottom plate 111 of a temperature test box 1 by a screw penetrating through a first threaded hole group 22, the base 4 is provided with a third threaded hole group 42, a fourth threaded hole group 43 and an adapter seat mounting hole 44, the screw penetrating through the third threaded hole group 42 is connected with a second threaded hole group 23, the base 4 is fixedly connected on the fixed platform 2, the circumferential direction of the adapter seat 3 is uniformly provided with a plurality of threaded holes 31, the adapter seat 3 is arranged in the adapter seat mounting hole 44, the screw penetrating through the fourth threaded hole group 43 is connected with the threaded hole 31, fixedly connecting the adapter 3 on the base 4; the fixture connecting shaft 9 comprises a bearing mounting shaft section 91, a shaft shoulder 92, a connecting shaft body 93, a groove 94 and a connecting shaft threaded hole group 95, wherein the shaft shoulder 92 is arranged at the center of the first end of the connecting shaft body 93, the bearing mounting shaft section 91 is arranged at the center of the first end of the shaft shoulder 92, the groove 94 is arranged at the center of the second end of the connecting shaft body 93, a plurality of threaded holes are uniformly formed in the wall of the groove 94 to form the connecting shaft threaded hole group 95, the box penetrating connecting shaft 5 comprises a connecting shaft shoulder 51 arranged at the first end of the box penetrating connecting shaft body 52 and a first flange 53 arranged at the second end, the plastic sleeve 6 is arranged in a plastic sleeve mounting hole 121 on the temperature test box 1, the box penetrating connecting shaft body 52 is arranged in the plastic sleeve mounting hole 121, the connecting shaft shoulder 51 is arranged in the groove 94 of the fixture connecting shaft 9, and is connected with the connecting shaft shoulder threaded hole group 54 uniformly arranged on the circumference, the clamp connecting shaft 9 and the box penetrating connecting shaft 5 are fixedly connected together, a second flange 71 is arranged at the first end of the motor shaft 7, the first flange 53 and the second flange 71 are fixedly connected together through a coupler 8, and the second end of the motor shaft 7 is fixedly connected with an output shaft of the motor 12.

The motor 12 is fixed on a motor fixing platform 15, a roller 16 is installed below the motor fixing platform 15, the roller 16 is installed on a roller path 17, a manual lead screw 18 is installed between the second end of the motor fixing platform 15 and a rack 20, axial movement within a certain range can be achieved, the manual lead screw 18 is driven by manpower and is provided with a mechanical lock 19, the motor 12 is connected with a motor controller 13 through a cable, the motor controller 13 sends instructions to control the rotating speed, the steering direction and the operating time of the motor 12, the temperature test box 1 is connected with a temperature box controller 14 through a cable, and the temperature box controller 14 sends instructions to control the temperature value, the temperature change speed and the heat preservation time in the temperature test box 1; and during the test, the tested bearing 10 is connected with the internal thread hole of the adapter 3 through the external thread of the rod end of the tested bearing 10, the inner ring of the tested bearing 10 is arranged on the bearing installation shaft section 91 at the first end of the clamp connecting shaft 9, the center of the retainer ring 11 is provided with a through hole, a screw passes through the through hole of the retainer ring 11 to be connected with a threaded hole arranged at the center of the first end of the clamp connecting shaft 9, the retainer ring 11 and a shaft shoulder 92 on the clamp connecting shaft 9 clamp the tested bearing 10 together, and the shaft system is driven by the motor 12 to realize the rotation of the inner ring.

The base 4 comprises a base body 41, a third threaded hole group 42, a fourth threaded hole group 43 and an adapter mounting hole 44, wherein a through hole is formed in the center of the base body 41, the cross section of the base 4 is in a shape of a Chinese character 'er', the third threaded hole group 42 is arranged on the wing edge of the base body 41 and comprises a plurality of threaded holes which are uniformly formed, and the fourth threaded hole group 43 is uniformly arranged at the second end of the base body 41 along the radial direction; the adapter 3 is a hollow body, and an internal thread is tapped in a hole of the adapter 3; after the tested bearing 10 is installed, the axis of the rod end shaft is parallel to the central axes of the base 4 and the adapter 3, and the axis of the bearing inner ring is parallel to the central axes of the clamp connecting shaft 9 and the box penetrating connecting shaft 5; the test clamp parts in the temperature test box 1 are made of stainless steel materials; cotton yarn is wound between the plastic sleeve 6 and the box penetrating connecting shaft 5.

In another aspect of the present invention, a testing method based on the rod end bearing extreme temperature testing fixture is provided, as shown in fig. 2, including the following steps:

s1: before the test is started, the adapter 3, the clamp connecting shaft 9 and the check ring 11 are not installed;

s2: screwing the rod end thread of the tested bearing 10 into the internal thread hole of the adapter 3;

s3: a bearing mounting shaft section 91 for mounting the inner race of the bearing 10 to be tested to the jig connecting shaft 9;

s4: the retainer ring 11 is screwed into a threaded hole at the first end of the clamp connecting shaft 9 and clamps the bearing 10 to be tested together with a shaft shoulder 92 on the clamp connecting shaft 9;

s5: installing the adapter 3 on the base 4, adjusting the exposed height of the rod end of the tested bearing 10, and adjusting the manual lead screw 18 to enable the tested bearing 10 to move axially;

s6: fitting the groove 94 of the second end of the clamp connecting shaft 9 to the connecting shoulder 51 of the first end of the through box connecting shaft 5;

s7: after the completion of the debugging, the power supplies of the motor controller 13 and the temperature box controller 14 and the power supply of the motor 12 were turned on to perform the test.

Specifically, the adapter 3 is installed on the base 4, the base 4 is installed on the fixed table 2, the tested bearing 10 is connected with an internal thread hole of the adapter 3 through an external thread of a rod end of the tested bearing during testing, and the outer diameter of the adapter 3 is matched with an inner hole of the base 4 and is installed on the fixed table 2 together; the inner ring of the tested bearing 10 is radially rotated by clamping the clamp connecting shaft 9 with a screw penetrating through the retainer ring 11 and driving the shaft by a motor 12. The threaded connection between the tested bearing 10 and the adapter 3 is convenient to disassemble and assemble, and meanwhile, the consistency of the rotation center of the tested bearing 10 and the rotation center of the motor 12 is easily ensured by controlling the exposed height of the rod end of the tested bearing 10. Four threaded holes are uniformly formed in the circumferential direction of the base 4 and are connected with the annular groove of the adapter 3 through bolts, and the connection concentricity of the two shafts can be guaranteed by setting reasonable dimensional tolerance and machining precision. Therefore, the machining precision of the clamp is ensured, and the centering performance of the tested bearing 10 can be quickly and conveniently realized in the experimental process.

The clamp connecting shaft 9 is provided with a groove 94, the box penetrating connecting shaft 5 is provided with a connecting shaft shoulder 51, the inner surface of the groove 94 and the outer surface of the connecting shaft shoulder 51 are in transition fit, four threaded holes are uniformly distributed in the circumferential direction at the joint of the two shafts and are connected through bolts, and the connection concentricity of the two shafts can be ensured by setting reasonable dimensional tolerance and machining precision.

The box penetrating connecting shaft 5 penetrates through the outer wall of the temperature test box 1 to be connected with the motor 12 through the coupler 8, and bending moment caused by motor vibration and mounting non-concentricity is reduced. Wear case connecting axle 5 and pass temperature test case 1 through plastic cover 6, with 6 clearance fit of plastic cover, select polytetrafluoroethylene for use as the material of preferred plastic cover 6, this section material has wear-resisting, difficult heat conduction, characteristics such as indeformable in the bearing operating temperature scope, guaranteed that the major axis passes temperature test case 1 department, when the operation, the axle surface can not wear and tear, can not cause incasement temperature and external quick heat exchange yet, guaranteed the constancy of the inside temperature of predetermineeing of temperature test case 1 well.

The motor 12 is fixed on a motor fixing platform 15, a roller 16 and a roller path 17 are installed below the motor fixing platform 15, movement along the axial direction within a certain range can be achieved, the motor 12 is moved by manually driving a manual lead screw 18 and is provided with a mechanical lock 19, stability of the motor 12 in the working process is guaranteed, the motor 12 is connected with a motor controller 13 through a cable, and the motor controller 13 sends instructions to control the rotating speed, the steering and the running time of the motor 12. The temperature test box 1 is connected with the temperature box controller 14 through a cable, and the temperature box controller 14 sends an instruction to control the temperature value, the temperature change speed and the heat preservation time of the temperature test box 1.

The testing device can realize the limit temperature test of rod end rolling bearings of different models only by replacing the adapter 3, the clamp connecting shaft 9 and the retainer ring 11. The adapter 3 is used for fixing the bearing 10 to be tested, so that the bearing 10 to be tested can be conveniently assembled and disassembled; meanwhile, in the installation process, the exposed height of the rod end of the tested bearing 10 is controlled, and the alignment of the tested bearing 10 and the rotating shaft of the motor 12 is easily ensured. Consequently, through to the fixed station 2, the adapter 3, base 4, wear case connecting axle 5, plastic cover 6, the dimensional tolerance design of anchor clamps connecting axle 9 and the control of machining precision, and the remaining height value of the product rod end of being tried, can be convenient, swiftly guarantee in the dismantlement in-process by the rotatory centering nature of examination bearing 10, the precision and the accuracy of experimental result have been guaranteed, anchor clamps simple structure, convenient to detach, in the installation, dismantle, all do not have the problem of interference between the part in the experimentation, the time of installation preparation has been shortened, the equipment availability factor has been improved.

In the in-service use process, wear the case connecting axle 5 and pass the plastic cover 6 on the temperature test case 1 and insert the temperature incasement, the axis of rotation that shaft coupling 8 and motor 12 are passed through to one end links to each other, the other end inserts in the recess 94 of anchor clamps connecting axle 9, and fix with the circumference screw hole that two connecting axles of four bolt twists, the base 4 is packed into to adapter 3, and twist the circumference screw hole of base 4 with four bolts, twist in the annular groove of adapter 3, carry out axial fixity to adapter 3, the bottom at temperature test case 1 is installed to fixed station 2, each part all adopts bolted connection fixed. The motor controller 13 and the temperature box controller 14 respectively control the operation condition of the motor 12 and the temperature in the temperature test box 1 through cables, and an integrated motor and an integrated temperature control box which integrate the motor 12 and the motor controller 13 can also be made.

During the extreme temperature test, utilize motor fixed platform 15's manual lead screw 18 with motor 12 to slide a short distance to the rear, be convenient for dress card by the bearing 10, earlier with the rod end screw in adapter 3 of by the bearing 10, reuse slide caliper rule control rod end protrusion, promote motor fixed platform 15 along forward slowly, make anchor clamps connecting axle 9 insert by the bearing 10 inner circle of being examined, with the bolt of internal thread spanner locking base 4, at last with the screw hole of bolt screw in anchor clamps connecting axle 9 front end, firmly lock each part of anchor clamps and bearing inner circle, the installation is fixed, gently rotate by the inner circle of by the bearing 10 of being examined, ensure that the bearing does not receive the yawing force, avoid influencing the accuracy of test result.

After the limit temperature test is completed, only the wrench is needed to loosen the bolt penetrating through the check ring 11, the motor fixing platform 15 is pushed backwards to separate the bearing inner ring from the clamp connecting shaft 9, the tested bearing 10 can be unscrewed from the adapter 3, a new tested bearing 10 is replaced, the rod end of the tested bearing 10 is screwed into the adapter 3, the extension amount of the rod end is controlled by the caliper, the motor fixing platform 15 is pushed forwards to enable the clamp connecting shaft 9 to be inserted into the inner ring of the tested bearing 10, and the bolt of the base 4 is locked by the internal thread wrench, so that the limit temperature test of the next round can be carried out again. If the test bearing 10 of a new model is replaced, only the adapter 3, the clamp connecting shaft 9 and the check ring 11 need to be replaced, and other steps are unchanged.

Preferably, in order to prevent the test fixture from losing efficacy under the action of long-term high temperature and low temperature, the test fixture part in the temperature test box 1 is made of stainless steel, and in order to prevent air inside and outside the temperature test box 1 from carrying out tiny heat exchange through tiny gaps between the plastic sleeve 6 and the box penetrating connecting shaft 5, unnecessary electric energy waste is caused, and cotton yarns can be used for appropriately blocking gaps.

The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the invention, it should be understood that various modifications and adaptations can be made by those skilled in the art without departing from the principles of the present application and should be considered as within the scope of the present application.

Claims (7)

1. A rod end bearing extreme temperature test fixture is characterized by comprising a fixed platform, an adapter, a base, a box penetrating connecting shaft, a plastic sleeve, a motor shaft, a coupler, a fixture connecting shaft and a retainer ring,

the temperature test device is characterized in that a first threaded hole group and a second threaded hole group are arranged on the fixed table, the first threaded hole group and the second threaded hole group are uniformly distributed on two concentric circles, a plate body of the fixed table is fixedly connected onto a bottom plate of a temperature test box by screws penetrating through the first threaded hole group, a third threaded hole group, a fourth threaded hole group and a switching seat mounting hole are arranged on the base, the screws penetrate through the third threaded hole group to be connected with the second threaded hole group, the base is fixedly connected onto the fixed table, a plurality of threaded holes are uniformly arranged in the circumferential direction of the switching seat, the switching seat is mounted in the switching seat mounting hole, the screws penetrate through the fourth threaded hole group to be connected with the threaded holes in the switching seat, and the switching seat is fixedly connected onto the base;

the fixture connecting shaft comprises a bearing mounting shaft section, a shaft shoulder, a connecting shaft body, a groove and a connecting shaft threaded hole group, the shaft shoulder is arranged in the center of the first end of the connecting shaft body, the bearing mounting shaft section is arranged in the center of the first end of the shaft shoulder, the groove is arranged in the center of the second end of the connecting shaft body, a plurality of threaded holes are uniformly formed in the groove wall of the groove to form the connecting shaft threaded hole group, the box penetrating connecting shaft comprises a connecting shaft shoulder arranged at the first end of the box penetrating connecting shaft body and a first flange arranged at the second end, the plastic sleeve is arranged in a plastic sleeve mounting hole on the temperature test box, the box penetrating connecting shaft body is arranged in the plastic sleeve mounting hole, the connecting shaft shoulder is arranged in the groove of the fixture connecting shaft, and a screw penetrates through the connecting shaft threaded hole group to be connected with a connecting shaft shoulder threaded hole uniformly arranged on the circumference of the connecting, fixedly connecting the clamp connecting shaft and the box penetrating connecting shaft together, wherein a first end of a motor shaft is provided with a second flange, the first flange and the second flange are fixedly connected together through the coupler, and a second end of the motor shaft is fixedly connected with an output shaft of a motor;

the motor is fixed on a motor fixing platform, a roller is installed below the motor fixing platform, the roller is installed above a roller path, a manual lead screw is installed between the second end of the motor fixing platform and a rack and can axially move within a certain range, the manual lead screw is driven by manpower and is provided with a mechanical lock, the motor is connected with a motor controller through a cable, the motor controller sends an instruction to control the rotating speed, the steering speed and the running time of the motor, the temperature test box is connected with a temperature box controller through a cable and sends an instruction to control the temperature value, the temperature change speed and the heat preservation time in the temperature test box; and

during testing, a tested bearing is connected with an internal thread hole of the adapter through an external thread of a rod end of the tested bearing, an inner ring of the tested bearing is installed on a bearing installation shaft section at the first end of the clamp connecting shaft, a through hole is formed in the center of the retainer ring, a screw penetrates through the through hole of the retainer ring and is connected with a threaded hole formed in the center of the first end of the clamp connecting shaft, the retainer ring and a shaft shoulder on the clamp connecting shaft clamp the tested bearing together, and the shaft is driven by the motor through a shaft system, so that the rotation of the inner ring of the tested bearing is realized.

2. The rod end bearing extreme temperature test fixture of claim 1, wherein the base comprises a base body, a third threaded hole group, a fourth threaded hole group and an adapter mounting hole, a through hole is formed in the center of the base body, the cross section of the base is in a shape of a Chinese character 'er', the third threaded hole group is arranged on the wing edge of the base body and comprises a plurality of uniformly arranged threaded holes, and the fourth threaded hole group is uniformly arranged at one end, close to the adapter, of the base body along the radial direction.

3. The rod end bearing extreme temperature test fixture of claim 2, wherein the adapter is configured as a hollow body and the adapter bore is internally threaded.

4. The clamp for testing the limit temperature of the rod end bearing according to claim 2, wherein after the tested bearing is installed, the axis of the rod end shaft of the tested bearing is parallel to the central axes of the base and the adapter, and the axis of the bearing inner ring of the tested bearing is parallel to the central axes of the clamp connecting shaft and the box penetrating connecting shaft.

5. A rod end bearing extreme temperature test fixture as defined in claim 1, wherein the test fixture portions within the temperature test chamber are each formed of a stainless steel material.

6. The rod end bearing extreme temperature test fixture of claim 1, wherein cotton yarn is wrapped between the plastic sleeve and the box-through connecting shaft.

7. A testing method using the rod end bearing extreme temperature test fixture of any one of claims 1-6, comprising the steps of:

s1: before the test is started, the adapter, the clamp connecting shaft and the check ring are not installed;

s2: screwing the rod end thread of the tested bearing into the internal thread hole of the adapter;

s3: mounting the inner ring of the tested bearing to a bearing mounting shaft section of the clamp connecting shaft;

s4: the retainer ring is installed in a threaded hole at the first end of the clamp connecting shaft through a screw, and the retainer ring and a shaft shoulder on the clamp connecting shaft clamp the tested bearing;

s5: installing the adapter on the base, adjusting the exposed height of the rod end of the tested bearing, and adjusting the manual lead screw to enable the tested bearing to move axially;

s6: mounting the groove at the second end of the clamp connecting shaft on a connecting shaft shoulder at the first end of the box penetrating connecting shaft;

s7: and after debugging is finished, turning on the power supplies of the motor controller and the temperature box controller and the power supply of the motor for testing.

Images