A bearing swing test device

Abstract

The present invention relates to a bearing swing test device, comprising a mounting bracket, a driving shaft system is mounted on the mounting bracket, one end of the driving shaft system is connected to a bearing test fixture for fitting with a test bearing, the bearing test fixture is provided with a connection end connected with the driving shaft system, and is also provided with a fan-shaped matching surface coaxial with the driving shaft system, the fan-shaped matching surface is used for rolling matching with the outer ring of the test bearing, the bearing swing test device also includes a radial loading device, the radial loading device includes a loading rod, the loading rod includes a rod body and a loading head, the test bearing is mounted on the end of the loading head, and the axis of the test bearing is parallel to the axis of the driving shaft system, the loading rod passes the axis of the driving shaft system and faces the fan-shaped matching surface. When disassembling and assembling the test bearing, it is only necessary to separate the loading rod from the bearing test fixture, and the test bearing can be quickly disassembled and assembled.

Description

Technical Field

[0001] The invention relates to the technical field of bearing testing, and in particular to a bearing swing testing device. Background Art

[0002] When the propeller of a shipborne helicopter is parked on the deck, it takes up a large area when unfolded. Therefore, a tail boom folding system is provided on the propeller of the helicopter so that the propeller can be folded at a certain angle when the helicopter is parked on the deck, thereby reducing the area occupied by the helicopter. The tail boom folding system is provided with a support arm limit lock structure, which is a key component of the tail boom folding system, and its performance determines the stability and function of the entire tail boom folding system.

[0003] The fork needle roller bearing is a rolling bearing developed to match the arm limit lock of the tail beam folding system. As a moving part, once the bearing fails, the entire system will be shut down. Figure 6 As shown, the shift fork needle roller bearing includes a rubber sealing ring 11, a retaining ring 12, a needle roller 13, an inner ring 14 and an outer ring 15, which is installed in the arm limit lock of the tail beam folding system. The inner ring is fastened with bolts. During the locking and unlocking process, the outer ring of the shift fork needle roller bearing contacts / disconnects with the support baffle.

[0004] When the arm limit lock is locked, the outer ring of the shift fork needle roller bearing contacts with the support baffle under a large radial load. At this time, when the propeller is folded, the outer ring of the shift fork needle roller bearing will roll relative to the support baffle, and the inner ring is fixed and does not rotate. When the propeller needs to be unfolded, the outer ring of the shift fork needle roller bearing rolls relative to the support baffle again, and then the arm limit lock is unlocked, and the outer ring of the shift fork needle roller bearing is separated from the support baffle.

[0005] During the operation of the shift fork needle roller bearing, its inner ring is fixed, and the outer ring rolls back and forth on the support baffle at a specified angle, so that the outer ring of the bearing will roll back and forth relative to the fixed inner ring of the bearing, and the shift fork needle roller bearing is subjected to a large radial load during the operation. Therefore, it is necessary to effectively simulate the actual working conditions of the shift fork needle roller bearing on the helicopter main engine through testing, so that the shift fork needle roller bearing can reach the rolling number and use intensity within the life cycle, and provide a reliable installation verification basis for the installation of the helicopter main engine.

[0006] In the prior art, a Chinese invention patent application with application publication number CN110196164A and application publication date 2019.09.03 discloses a multifunctional bearing testing machine, which includes a drive adjustment device, a power source switching device, a dynamic and static pressure spindle device, a radial loading device, a bearing mounting tool and an axial overturning loading part. The drive adjustment device is used to provide power to the invention, and the power source switching device is used to convert the provided power into reciprocating swinging motion through a swing cylinder. A dynamic and static pressure spindle device for transmitting power is provided between the drive adjustment device and the power source switching device. The test bearing is installed in the bearing mounting tool, the inner ring of the bearing is fixedly connected to the bearing mounting tool, and the outer ring can rotate relative to the inner ring. The radial loading device loads the bearing mounting tool, and the axis of the radial loading device is perpendicular to the axis of the test bearing to achieve radial loading of the test bearing, so as to achieve the simulation of the working condition in which the inner ring of the bearing is fixed and the outer ring swings a certain angle relative to the inner ring.

[0007] However, the overall structure of the invention is relatively complex, and the bearing is not easy to disassemble and assemble during use. Summary of the invention

[0008] The purpose of the present invention is to provide a bearing swing test device, which is used to solve the problem that the overall structure of the multifunctional bearing tester in the prior art is relatively complex and the bearing is difficult to disassemble and assemble during use.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0010] A bearing swing test device comprises a mounting bracket, on which a drive shaft system is mounted, one end of the drive shaft system is connected to a bearing test fixture for fitting with a test bearing, the bearing test fixture is provided with a connecting end connected to the drive shaft system, and is also provided with a fan-shaped mating surface coaxial with the drive shaft system, the fan-shaped mating surface is used for rolling fit with the outer ring of the test bearing, the bearing swing test device also comprises a radial loading device, the radial loading device comprises a loading rod, the loading rod comprises a rod body and a loading head, the test bearing is mounted on the end of the loading head, and the axis of the test bearing is parallel to the axis of the drive shaft system, the loading rod passes through the axis of the drive shaft system and is opposite to the fan-shaped mating surface.

[0011] Furthermore, the drive shaft system includes a drive shaft, a positioning insertion hole is provided at the shaft end of the drive shaft, the bearing test tooling includes a flange body, one end face of the flange body is provided with an insertion boss that cooperates with the positioning insertion hole, the insertion boss constitutes the connecting end, and the other end face of the flange body is provided with a fan-shaped flange coaxial with the flange body, and the fan-shaped mating surface is on the inner arc surface of the fan-shaped flange.

[0012] Furthermore, a matching protrusion extending circumferentially on the arc surface is provided on the inner arc surface of the sector-shaped flange, and the surface of the matching protrusion constitutes the sector-shaped matching surface.

[0013] Furthermore, a positioning protrusion is arranged on one side of the insertion boss.

[0014] Furthermore, the loading head has a mounting groove, and mounting holes are respectively opened on the groove arms on both sides of the mounting groove. A fixed shaft is passed through the mounting hole, and the part of the shaft located in the mounting groove is used to install the test bearing.

[0015] Furthermore, a bolt is passed through the mounting hole of the loading head, and the bolt is locked and fixed to the loading head using a nut, and the bare rod section of the bolt constitutes the rotating shaft.

[0016] Furthermore, the drive shaft system includes bearing assemblies located at both ends of the drive shaft for rotatably supporting the drive shaft. The bearing assemblies include bearings and bearing retaining rings, and the flange body is fixedly connected to the bearing retaining rings.

[0017] Furthermore, the bearing at one end of the driving shaft system close to the flange body is a cylindrical roller bearing.

[0018] Furthermore, the bearing at one end of the drive shaft system away from the flange body is a deep groove ball bearing.

[0019] Furthermore, the radial loading device is arranged directly above the bearing test fixture.

[0020] The above technical scheme has the following beneficial effects: the present invention pioneers a bearing swing test device, including a mounting bracket, a drive shaft system is mounted on the mounting bracket, one end of the drive shaft system is connected to a bearing test fixture for fitting with a test bearing, the bearing test fixture is provided with a connection end connected to the drive shaft system, and is also provided with a fan-shaped mating surface coaxial with the drive shaft system, the fan-shaped mating surface is used for rolling with the outer ring of the test bearing, the bearing swing test device also includes a radial loading device, the radial loading device includes a loading rod, the loading rod includes a rod body and a loading head, the test bearing is mounted at the end of the loading head, and the axis of the test bearing is parallel to the axis of the drive shaft system, the loading rod passes through the axis of the drive shaft system and faces the fan-shaped mating surface. Compared with the multifunctional bearing tester in the prior art, the present invention has a simple structure. When disassembling and assembling the test bearing, it is only necessary to separate the loading rod from the bearing test fixture, so that the test bearing can be quickly disassembled and assembled. At the same time, it can effectively simulate the working condition that the outer ring of the bearing swings relative to the inner ring when subjected to a large radial load, and provide reliable test data for the use of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a bearing swing test device of the present invention;

[0022] Figure 2 for Figure 1 A magnified schematic diagram of point A;

[0023] Figure 3 A front view of an embodiment of a bearing test fixture of the present invention;

[0024] Figure 4 A side cross-sectional view of an embodiment of a bearing test fixture of the present invention;

[0025] Figure 5 It is a schematic diagram of the swing of the bearing test fixture of the present invention;

[0026] Figure 6 This is a cross-sectional view of the fork needle roller bearing;

[0027] Figure 7 Schematic diagram of the calculation of the swing angle of the test bearing.

[0028] In the figure: 1. test bearing; 2. loading rod; 3. loading cylinder; 4. bearing test fixture; 41. matching protrusion; 42. positioning protrusion; 43. lifting hole; 5. cylindrical roller bearing; 6. drive shaft; 7. deep groove ball bearing; 8. coupling; 9. servo motor; 10. mounting bracket; 11. rubber sealing ring; 12. retaining ring; 13. needle roller; 14. inner ring; 15. outer ring; R1, rolling radius of bearing outer ring; R2, swing radius of bearing test fixture; N1, swing angle of bearing outer ring; N2, swing angle of bearing test fixture; A, swing center of test bearing outer ring; B, starting point of test bearing swing; C, end point of test bearing swing; L, arc length of test bearing swing. DETAILED DESCRIPTION

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] The present invention provides a bearing swing test device, which is provided with a bearing test fixture on a driving shaft system, a connecting end connected to the driving shaft system is provided on the bearing test fixture, and a fan-shaped matching surface coaxial with the driving shaft system is also provided, the fan-shaped matching surface is used for rolling matching with the outer ring of the test bearing, and the test bearing is installed on the loading head of the radial loading device, and the axis of the test bearing is parallel to the axis of the driving shaft system, and the loading rod passes through the axis of the driving shaft system and faces the fan-shaped matching surface. The present invention has a simple structure, and when disassembling and assembling the test bearing, it is only necessary to separate the loading rod from the bearing test fixture, and the test bearing can be quickly disassembled and assembled. At the same time, it can effectively simulate the working condition that the outer ring of the bearing swings relative to the inner ring when subjected to a large radial load, and provide reliable test data for the use of the bearing.

[0031] Based on the above concept, the present invention provides a variety of different embodiments of bearing swing test devices for illustration.

[0032] In a basic embodiment, Figure 1 As shown, the bearing swing test device of the present invention includes a mounting bracket 10, on which a drive shaft system is mounted, the drive shaft system includes a drive shaft 6, one end of the drive shaft 6 is connected to a bearing test fixture 4 for fitting with a test bearing 1, the bearing test fixture 4 is provided with a connecting end connected to the drive shaft system, and is also provided with a fan-shaped mating surface coaxial with the drive shaft system, the fan-shaped mating surface is used for rolling fit with the outer ring of the test bearing 1, the bearing swing test device also includes a radial loading device, the radial loading device includes a loading rod 2, the loading rod includes a rod body and a loading head, the test bearing 1 is mounted on the loading head, and the axis of the test bearing 1 is parallel to the axis of the drive shaft system, the loading rod 2 passes through the axis of the drive shaft system and is opposite to the fan-shaped mating surface.

[0033] When the test bearing 1 needs to be disassembled, the loading rod 2 is separated from the bearing test fixture 4, so that the loading head is away from the sector-shaped mating surface, so that the test bearing 1 can be quickly disassembled and assembled on the loading head. When in use, the driving shaft 6 drives the bearing test fixture 4 to move together, and the radial loading device is used to load, so that the outer ring of the test bearing 1 is closely attached to the sector-shaped mating surface of the bearing test fixture 4, and the outer ring of the test bearing 1 reciprocates with the bearing test fixture 4 under the action of the radial load.

[0034] On the basis of the above embodiment, a connecting rod can be used to be fixedly connected to the drive shaft system, the axis of the connecting rod is perpendicular to the axis of the drive shaft system, and a fan-shaped matching surface is set at the other end of the connecting rod, so that the connecting rod and the fan-shaped matching surface constitute the bearing test fixture 4. In a preferred embodiment, Figure 3-4 As shown, the bearing test fixture 4 includes a flange body, one end face of the flange body is provided with an insert boss, the insert boss constitutes a connecting end fixedly connected with the drive shaft system, the axial end of the drive shaft 6 is provided with a positioning insert hole for the insert boss of the flange body to be inserted, and the other end face of the flange body is provided with a fan-shaped flange coaxial with the flange body, the inner arc surface of the fan-shaped flange constitutes a fan-shaped mating surface that cooperates with the test bearing 1, so as to ensure the stability of the connection between the bearing test fixture 4 and the drive shaft system.

[0035] On the basis of the above-mentioned embodiment, the fan-shaped mating surface formed by the inner arc surface of the fan-shaped flange is finely processed to ensure the minimum error during the test. Figure 4 As shown, a mating protrusion 41 extending circumferentially on the arc surface is also provided on the inner arc surface of the fan-shaped flange of the bearing test tooling 4, and the mating protrusion 41 is fitted with the outer ring of the test bearing 1. In this way, the mating protrusion 41 can be fine-processed, which reduces the scope of fine processing and facilitates the processing of the bearing test tooling 4.

[0036] On the basis of the above embodiment, the insertion boss provided on the bearing test fixture 4 is matched with the positioning insertion hole provided on the shaft end of the drive shaft 6, and the bearing test fixture 4 is fixedly connected to the drive shaft system by bolts. The side surface of the insertion boss needs to be finely processed to reduce the error in the positioning and matching between the bearing test fixture 4 and the drive shaft system. In a preferred embodiment, Figure 4 As shown, a positioning protrusion 42 for positioning with the drive shaft system is provided around the side of the insertion boss, and the positioning protrusion 42 can be fine-machined, so that the bearing test fixture 4 can be better positioned and matched with the drive shaft system and the scope of fine machining can be reduced.

[0037] On the basis of the above embodiment, the loading head can be configured as an L-shaped rod including a long rod section and a short rod section perpendicular to each other, the long rod section of the L-shaped rod is connected to the rod body of the loading rod 2, the loading rod 2 is connected to the loading cylinder 3, and the short rod section of the L-shaped rod is installed with the test bearing 1. In a preferred embodiment, as Figure 2 As shown, the loading head is a rod body structure as a whole, and the end of the rod body has a mounting groove. The groove arms on both sides of the mounting groove are respectively provided with mounting holes for the rotating shaft to pass through. The part of the rotating shaft in the mounting groove is used to install the test bearing 1, so as to ensure that the applied radial load can be effectively transmitted to the test bearing 1.

[0038] On the basis of the above embodiments, the rotating shaft can be set as a pin or a pin. In a preferred embodiment, a bolt is installed in the mounting hole of the loading head, and the bolt is locked and fixed to the loading head using a nut, and the bare rod section of the bolt constitutes the rotating shaft.

[0039] In the above embodiment, the drive shaft system includes a drive shaft 6 and bearing assemblies at both ends of the drive shaft for rotatably supporting the drive shaft 6. The bearing assembly includes a bearing and a bearing retaining ring. The flange body of the bearing test fixture 4 is fixedly connected to the bearing retaining ring.

[0040] Preferably, Figure 1 As shown, the bearing at one end of the drive shaft system close to the flange body is set as a cylindrical roller bearing 5, and the bearing at one end of the drive shaft system away from the flange body is set as a deep groove ball bearing 7. The cylindrical roller bearing 5 is set close to the bearing test fixture 4, which can withstand a certain load and further prevent the drive shaft 6 of the drive shaft system from flexural deformation. The deep groove ball bearing 7 can axially limit the drive shaft 6 and can withstand a part of the component load.

[0041] On the basis of the above embodiment, the radial loading device can be arranged directly below the bearing test fixture 4 or on the side at the same level. The loading rod 2 of the radial loading device needs to pass through the axis of the drive shaft system and face the arc mating surface of the bearing test fixture 4. The swing angle of the bearing test fixture 4 also needs to be adjusted. In a preferred embodiment, Figure 1As shown, the radial loading device is arranged directly above the bearing test fixture 4.

[0042] On the basis of the above embodiment, a common motor is used as the driving device, the motor is connected to one end of the driving shaft system through a coupling 8, and a swing cylinder is arranged between the driving shaft system and the bearing test fixture 4 to realize the swing function. In a preferred embodiment, as Figure 1 As shown, a servo motor 9 is used as a driving device, which is connected to a driving shaft system through a coupling 8, and the swing function can be realized by relying on the servo motor.

[0043] Take the simulated fork needle roller bearing as an example. Figure 6 As shown, the shift fork needle roller bearing comprises a rubber seal ring 11, a retaining ring 12, a needle roller 13, an inner ring 14 and an outer ring 15. When in use, the shift fork needle roller bearing is first installed on the bearing swing test device of the present invention, as shown in FIG. Figure 1-2 As shown, the loading rod 2 of the radial loading device is fixedly connected to the inner ring 14 of the bearing, and the axis of the radial loading device is perpendicular to the axis of the fork needle roller bearing to be tested and the axis of the drive shaft system, so that the radial load on the fork needle roller bearing is the loading load. Figure 3 As shown, a hoisting hole 43 is provided on the bearing test fixture 4. The bearing test fixture 4 is hoisted and installed on the bearing swing test device and positioned with the drive shaft system. Then, the outer ring 15 of the shift fork needle roller bearing is fitted with the matching protrusion 41 on the bearing test fixture 4. The shift fork needle roller bearing and the bearing test fixture 4 are loaded by a radial loading device so that they are tightly pressed against the bearing test fixture 4. The loaded radial force is transmitted to the needle roller 13 through the inner ring 14 and then to the outer ring 15. In this way, the radial load on the shift fork needle roller bearing in actual use can be simulated.

[0044] like Figure 5 As shown, the arc length of the swing of the outer ring 15 of the fork needle roller bearing and the contact surface of the bearing test fixture 4 is consistent, as shown in FIG. Figure 7 As shown, A is the swing center of the test bearing outer ring, B is the starting point of the test bearing swing, C is the end point of the test bearing swing, and L is the arc length of the test bearing swing. Therefore, there is a formula (N1*π*R1) / (180°)=(N2*π*R2) / (180°), where R1 is the rolling radius of the bearing outer ring, R2 is the swing radius of the bearing test fixture, N1 is the swing angle of the bearing outer ring, and N2 is the swing angle of the bearing test fixture. It can be concluded that N1*R1=N2*R2, and the swing angle N1 of the bearing outer ring can be calculated. The frequency of the swing of the drive spindle is consistent with the frequency of the swing of the outer ring 15 of the fork needle roller bearing. The load, the swing angle of the drive spindle, that is, the swing angle N2 of the bearing test fixture, the swing frequency and the number of swings are input in the control interface of the servo motor 9, and the test bearing test condition can be simulated. A total of 200 cycles are performed during the test, that is, the outer ring 15 of the fork needle roller bearing swings back and forth for 200 cycles.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A bearing swing test device, characterized in that: It includes a mounting bracket, on which a drive shaft system is installed. One end of the drive shaft system is connected to a bearing test fixture for fitting with a test bearing. The bearing test fixture is provided with a connecting end connected to the drive shaft system, and is also provided with a fan-shaped matching surface coaxial with the drive shaft system. The fan-shaped matching surface is used for rolling matching with the outer ring of the test bearing. The bearing swing test device also includes a radial loading device. The radial loading device includes a loading rod. The loading rod includes a rod body and a loading head. The test bearing is installed at the end of the loading head, and the axis of the test bearing is parallel to the axis of the drive shaft system. The loading rod passes through the axis of the drive shaft system and is opposite to the fan-shaped matching surface.

2. The bearing oscillation test device according to claim 1, characterized in that: The drive shaft system includes a drive shaft, and a positioning insertion hole is provided at the shaft end of the drive shaft. The bearing test tooling includes a flange body, and one end face of the flange body is provided with an insertion boss that cooperates with the positioning insertion hole, and the insertion boss constitutes the connecting end. The other end face of the flange body is provided with a fan-shaped flange coaxial with the flange body, and the fan-shaped mating surface is on the inner arc surface of the fan-shaped flange.

3. The bearing oscillation test device according to claim 2, characterized in that: A matching protrusion extending circumferentially on the inner arc surface of the sector-shaped flange is arranged, and the surface of the matching protrusion constitutes the sector-shaped matching surface.

4. The bearing oscillation test device according to claim 2, characterized in that: A positioning protrusion is arranged on one circumference of the side surface of the insertion boss.

5. The bearing oscillation test device according to claim 1, characterized in that: The loading head has an installation slot, and the slot arms on both sides of the installation slot are respectively provided with installation holes, and a fixed shaft is passed through the installation hole. The part of the shaft in the installation slot is used for installing the test bearing.

6. The bearing oscillation test device according to claim 5, characterized in that: A bolt is passed through the mounting hole of the loading head, and the bolt is locked and fixed to the loading head by a nut, and the bare rod section of the bolt constitutes the rotating shaft.

7. The bearing oscillation test device according to claim 2, characterized in that: The driving shaft system comprises bearing assemblies at both ends of the driving shaft for rotatably supporting the driving shaft. The bearing assemblies comprise bearings and bearing retaining rings, and the flange body is fixedly connected to the bearing retaining rings.

8. The bearing oscillation test device according to claim 7, characterized in that: The bearing at one end of the drive shaft system close to the flange body is a cylindrical roller bearing.

9. The bearing oscillation test device according to claim 7, characterized in that: The bearing at one end of the drive shaft system away from the flange body is a deep groove ball bearing.

10. The bearing oscillation test device according to any one of claims 1 to 9, characterized in that: The radial loading device is arranged directly above the bearing test fixture.

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