CN209727462U - A kind of multistation bearing tester - Google Patents

Abstract

The utility model relates to a multi-station bearing testing machine, in particular to a testing device for testing the performance of a flexible thin-walled bearing in a static load sequential life test. The utility model includes a loading mechanism, a driving and supporting mechanism, a bearing test installation device and a frame, and is characterized in that the bearing test installation device is arranged in the middle of the loading mechanism and inside the support seat of the frame. The driving and supporting mechanism is arranged on the front and rear sides of the loading mechanism, which is used to drive and axially support the bearing test and installation device, and improve the rotation accuracy of the bearing test and installation device. As a key component of the harmonic reducer, precision flexible thin-walled bearings play a vital role in the overall performance of the harmonic reducer. The utility model can apply a certain radial load to the flexible thin-walled bearing, and simultaneously perform the life test of a plurality of bearings, thereby greatly saving the cost of the bearing life test.

Description

A multi-station bearing testing machine

technical field

The utility model relates to a multi-station bearing testing machine, which is especially suitable for fault detection of a flexible thin-walled bearing used in a harmonic reducer, and particularly relates to a performance test for a flexible thin-walled bearing in a static load accelerated sequential life test A testing device belongs to the field of mechanical testing.

Background technique

Harmonic reducer is the core basic component of industrial robots, and the research and development of its technology has become the bottleneck of the industrialization of domestic industrial robots. As the core component of the harmonic reducer, the precision flexible thin-walled bearing plays a vital role in the overall performance of the harmonic reducer. In the working state, the precision flexible thin-walled bearing not only bears the elastic deformation under the extrusion and expansion of the elliptical shaft that is precisely matched with the inner ring of the thin-walled bearing, but also bears the alternating stress caused by its own operation. Therefore, it is necessary to test the stability and life of the precision flexible thin-walled bearing, and put it into industrial production after meeting the requirements, so as to solve the problem of industrial robot industrialization in my country. The utility model can test the performance of the precision flexible thin-walled bearing under the working conditions of different loads and rotating speeds. The utility model can also carry out the life test of a plurality of precision flexible thin-walled bearings under the sequential life test, which can greatly save the test cost.

Contents of the invention

The purpose of the utility model is to provide a multi-station bearing testing machine with high efficiency, convenient operation, stable mechanical performance and reliable operation.

The utility model is realized through the following technical solutions: a multi-station bearing testing machine, including a loading mechanism, a driving and supporting mechanism, a bearing testing installation device and a frame, and is characterized in that: the bearing testing installation device is located at The middle position of the loading mechanism is located inside the support seat in the frame. The driving and supporting mechanism is arranged on the front and rear sides of the loading mechanism, and is used to drive and axially support the bearing test installation device and improve the bearing test installation device. The rotation accuracy; the frame includes: a base and a support seat, the above-mentioned support seat is arranged above the base, and is fixed on the base with T-shaped bolts; the loading mechanism includes: a sensor mounting seat, a pressure sensor, a loading Gland, pressure guide bolt, pressure adjustment bolt, pressurized heightened plate, heightened plate fastening screw, pressurized support rod, fastened bolt, pressurized connection seat, pressure lock nut, spring gland, force spring, output Oil nozzle, loading block, guide seat and flexible thin-walled bearing. One end of the above-mentioned pressurized support rod is locked on the support seat through threads, and the other end is connected with the pressurized connection seat through two fastening bolts. The pressure adjustment bolt is threaded. It is connected with the pressure connection seat, and the pressure lock nut is set on the pressure adjustment bolt, and one is set at the front and back; the above-mentioned pressurized heightening plate is locked on the support seat through the heightening plate fastening screw, and one end of the spring cover is connected with the The pressure adjustment bolt is in contact, and the other end is connected to the booster spring. The loading gland is connected to the sensor mounting seat through the pressure guide bolt. The pressure sensor is installed between the sensor mounting base and the loading gland. The pressure sensor is used to measure the booster spring. The radial force applied to the flexible thin-walled bearing, the guide seat is fixed on the inner surface of the support seat by bolts, the loading block is connected with the male thread at one end of the sensor mounting seat through the internal thread hole, and the contact surface of the loading block and the flexible thin-walled bearing It is a circular arc surface; the driving and supporting mechanism includes: electric spindle, electric spindle support seat, thimble and thimble support seat, the above-mentioned electric spindle is fixed on the electric spindle support seat by fastening bolts, and is used for driving bearing test installation device, the electric spindle support seat is fixed on the T-shaped groove of the base through T-shaped locking bolts, and the electric spindle support seat is set on one side of the loading mechanism, the above-mentioned thimble is fixed on the thimble support seat by fastening screws, and the thimble supports The seat is fixed on the T-shaped slot of the base through T-shaped locking bolts, and the thimble support seat is arranged on the other side of the loading mechanism for supporting the bearing test installation device.

Further, the bearing test installation device includes: a power connection member, a clamping device and a bearing installation sleeve, which is characterized in that the bearing installation sleeve is arranged between the power connection member and the clamping device, and can be carried out according to the actual number Setting, the clamping device runs through the bearing installation sleeve, and is connected with the power connection member; the power connection member includes: a pull stud and a spindle handle, the above pull stud is arranged at the front end of the spindle handle, and is connected by a thread It is fixed on the front end of the spindle handle, and the pull stud adopts a standard part head, which can be connected with the pneumatic clamping part in the electric spindle; the clamping device includes: clamping bolts, washers and spring washers, the above-mentioned The clamping bolt passes through the spring washer, the washer and the bearing installation sleeve, and its front end is provided with an external thread, and is connected with the end of the spindle tool holder through a threaded connection. The spring washer and the washer are arranged between the clamping bolt and the last set Between the bearing installation sleeves, there is a tapered hole at the center of the end of the clamping bolt, which is used to support the bearing test installation device in cooperation with the thimble to improve the rotation accuracy; the bearing installation sleeve includes: a bearing installation sleeve seat, a front retaining ring, Rear retaining ring, flexible thin-walled bearing, bearing locking bolts and set nuts. The set nut connects the bearing mounting sleeve, the front retaining ring and the rear retaining ring, and the flexible thin-walled bearing is installed on the bearing mounting sleeve.

Further, the shoulder of the bearing mounting sleeve and the flexible thin-walled bearing in the bearing testing installation device is an elliptical structure.

Further, the two mating structures of the front and rear of the bearing installation sleeve in the bearing installation sleeve are oval trapezoidal structures, and at the same time, pin holes are provided on the front and rear mating end surfaces of the bearing installation sleeve, which can effectively prevent the two bearings from Relative sliding between mounting sockets.

Further, the loading mechanism adjusts the position of the fastening bolt on the pressurized support rod and the pressure adjustment bolt to set the magnitude of the loading force by collecting the magnitude of the loading force fed back by the pressure sensor.

Further, the loading mechanism and bearing test installation device are provided with four sets of test stations for flexible thin-walled bearings, and the number of test stations in the loading mechanism and bearing test installation device can also be set according to actual needs.

Compared with the prior art, the utility model is a multi-station flexible thin-walled bearing testing machine, which can simultaneously install multiple flexible thin-walled bearings for life testing, and is very suitable for sequential life tests of flexible thin-walled bearings. It has the advantages of convenient loading, simple operation, convenient maintenance, convenient disassembly and assembly, etc.

Description of drawings

Fig. 1 is a schematic diagram of the axial side structure of the utility model.

Fig. 2 is the front view of the utility model.

Fig. 3 is a side view of the utility model.

Fig. 4 is a cross-sectional view along the direction of Fig. 2A-A.

Fig. 5 is a schematic diagram of the shaft side structure of the test installation shaft.

Figure 6 is a cross-sectional view of the test installation shaft.

Figure 7 is an isometric view of a single mounting shaft.

As shown in the figure: 1 is the base, 2 is the support seat, 3 is the sensor mounting seat, 4 is the pressure sensor, 5 is the loading gland, 6 is the pressure guide bolt, 7 is the pressure adjustment bolt, 8 is the pressure increase plate, 9 is the heightening plate fastening screw, 10 is the pressure support rod, 11 is the fastening bolt, 12 is the pressure connection seat, 13 is the pressure lock nut, 14 is the spring cover, 15 is the force spring, 16 is the output Oil nozzle, 17 is loading block, 18 is guide seat, 19 is flexible thin-walled bearing, 20 is electric spindle, 21 is electric spindle support seat, 22 is thimble, 23 is thimble support seat, 24 is pull nail, 25 is spindle cutter Handle, 26 is the clamping bolt, 27 is the spring washer, 28 is the washer, 29 is the bearing lock bolt, 30 is the front retaining ring, 31 is the rear retaining ring, 32 is the bearing mounting sleeve, 33 is the set nut .

Detailed ways

The purpose of the utility model is further described in detail in the following specific examples, and the examples cannot be repeated here one by one, but the implementation of the utility model is not therefore limited to the following examples.

Referring to accompanying drawings 1 to 7, a multi-station bearing testing machine includes a loading mechanism, a driving and supporting mechanism, a bearing test installation device and a frame, and is characterized in that: the bearing test installation device is located in the loading mechanism The middle position, and is located inside the support seat 2 in the frame, the driving and supporting mechanism is arranged on the front and rear sides of the loading mechanism, used to drive and axially support the bearing test installation device, improve the rotation of the bearing test installation device Accuracy; the frame includes: a base 1 and a support base 2, the above support base 2 is arranged above the base 1, and is fixed on the base 1 by T-shaped bolts; the loading mechanism includes: a sensor mounting base 3, Pressure sensor 4, loading gland 5, pressure guide bolt 6, pressure adjustment bolt 7, pressurized heightened plate 8, heightened plate fastening screw 9, pressurized support rod 10, fastened bolt 11, pressurized connection seat 12, pressure Lock nut 13, spring gland 14, force spring 15, oil nozzle 16, loading block 17, guide seat 18 and flexible thin-walled bearing 19, one end of the above-mentioned pressurized support rod 10 is locked on the support seat 2 by thread , the other end is connected to the pressure connection seat 12 through two fastening bolts 11, the pressure adjustment bolt 7 is connected to the pressure connection seat 12 through threads, the pressure lock nut 13 is arranged on the pressure adjustment bolt 7, and the front and rear Set one; the above-mentioned pressurized heightened plate 8 is locked on the support seat 2 through the heightened plate fastening screw 9, one end of the spring cover 14 is in contact with the pressure adjusting bolt 7, and the other end is connected with the force spring 15, and the pressure is loaded. The cover 5 is connected with the sensor mounting base 3 through the pressure guide bolt 6, the pressure sensor 4 is installed between the sensor mounting base 3 and the loading gland 5, and the pressure sensor 4 is used to measure the pressure applied to the flexible thin-walled bearing 19 by the force spring 15. Radial force, the guide seat 18 is fixed on the inner surface of the support seat 2 by bolts, the loading block 17 is connected with the male thread at one end of the sensor mounting seat 3 through an internal thread hole, and the contact surface of the loading block 17 and the flexible thin-walled bearing 19 is Arc surface; the drive and support mechanism includes: electric spindle 20, electric spindle support seat 21, thimble 22 and thimble support seat 23, the above-mentioned electric spindle 20 is fixed on the electric spindle support seat 21 by fastening bolts 11, It is used to drive the bearing test installation device. The electric spindle support seat 21 is fixed on the T-shaped groove of the base 1 through T-shaped locking bolts, and the electric spindle support seat 21 is set on one side of the loading mechanism. The above-mentioned thimble 22 is fastened by Screws are fixed on the thimble support seat 23, and the thimble support seat 23 is fixed on the T-shaped groove of the base 1 through T-shaped locking bolts, and the thimble support seat 23 is arranged on the other side of the loading mechanism, and is used to support the bearing test installation device .

The difference between this example and Embodiment 1 is that the bearing test installation device includes: a power connection member, a clamping device and a bearing installation sleeve, and it is characterized in that the bearing installation sleeve is arranged between the power connection member and the clamping device, It can be set according to the actual required quantity. The clamping device runs through the bearing installation sleeve and is connected with the power connecting member; At the front end of the main shaft handle 25, it is fixed on the front end of the main shaft handle 25 by threaded connection, and the pull stud 24 adopts a standard part head, which can be connected with the pneumatic clamping part in the electric main shaft 20; the clamping device includes : clamping bolt 26, gasket 28 and spring washer 27, the above-mentioned clamping bolt 26 passes through the spring washer 27, washer 28 and bearing mounting sleeve, its front end is provided with external thread, and is connected with the spindle cutter by thread The end of the handle 25 is connected, and the spring washer 27 and the washer 28 are arranged between the clamping bolt 26 and the last set of bearing installation sleeves. The center of the end of the clamping bolt 26 has a conical hole, which is used to support the thimble 22. The bearing test installation device improves the rotation accuracy; the bearing installation sleeve includes: a bearing installation sleeve 32, a front retaining ring 30, a rear retaining ring 31, a flexible thin-walled bearing 19, a bearing locking bolt 29 and a set nut 33, The above-mentioned front retaining ring 30 is arranged on the front side of the bearing installation sleeve 32, and the rear retaining ring 31 is arranged on the rear side of the bearing installation sleeve 32, and the bearing locking bolt 29 is connected with the bearing installation sleeve 32, the front stopper through the tightening nut 33. Ring 30 and back retaining ring 31, flexible thin-walled bearing 19 is installed on the bearing mounting sleeve 32.

The difference between this example and Embodiment 1 is that the shoulder of the bearing installation sleeve 32 and the flexible thin-walled bearing 19 in the described bearing test and installation device is an elliptical structure.

The difference between this example and Embodiment 1 lies in that the front and rear of the bearing installation sleeve 32 in the bearing installation sleeve cooperate with each other in an oval trapezoidal structure, and at the same time, pins are provided on the front and rear matching end surfaces of the bearing installation sleeve 32 The holes can effectively prevent the relative sliding between the two bearing mounting sleeves 32 .

The difference between this example and Embodiment 1 is that the loading mechanism is to adjust the position of the fastening bolt 11 on the pressurized support rod 10 and set the loading force by the pressure adjustment bolt 7 by collecting the loading force fed back by the pressure sensor 4 size.

The difference between this example and Embodiment 1 is that the loading mechanism and the bearing test installation device are provided with four test stations for flexible thin-walled bearings 19, and the test stations in the loading mechanism and the bearing test installation device can also be set according to actual needs. number of bits.

Working principle: By manually adjusting the pressure adjusting bolt 7, the applied load can be loaded to the flexible thin-walled bearing 19 through the spring gland 14, the force spring 15, the loading gland 5, the pressure sensor 4, the sensor mounting seat 3 and the loading block 17 On the outer ring of the bearing 19, the external radial load is loaded on the flexible thin-walled bearing 19. When the external load is loaded, the external load quantitative monitoring can be carried out through the pressure sensor 4, so as to guide the manual adjustment of the screwed-in position of the pressure adjusting bolt 7. When the radial load applied to the flexible thin-walled bearing 19 is adjusted, the electric spindle 20 is started, and the bearing test installation device rotates under the drive of the electric spindle 20 . At this time, the flexible thin-walled bearing 19 continuously produces periodic elastic deformation under the action of the elliptical alternating load. At the same time, it cooperates with external sensors such as eddy current, acceleration and rotational speed to complete the data collection of the flexible thin-walled bearing 19, and then Through data analysis, the fault judgment of the flexible thin-walled bearing 19 is carried out. If it is judged that the flexible thin-walled bearing 19 breaks down, then stop the machine and take off the corresponding faulty flexible thin-walled bearing 19, replace the new flexible thin-walled bearing 19 and continue the test until all the tests of this batch of flexible thin-walled bearings 19 are completed. Finally, according to the corresponding judgment criteria, it can be judged whether the batch of flexible thin-walled bearings 19 is qualified.

Claims (6)

1. A multi-station bearing testing machine, comprising a loading mechanism, a driving and supporting mechanism, a bearing test installation device and a frame, characterized in that: the bearing test installation device is located in the middle of the loading mechanism and is located on the machine Inside the support seat (2) in the frame, the driving and supporting mechanism is arranged on the front and rear sides of the loading mechanism, used to drive and axially support the bearing test and installation device, and improve the rotation accuracy of the bearing test and installation device; The frame includes: a base (1) and a support base (2), the above-mentioned support base (2) is arranged on the top of the base (1), and is fixed on the base (1) by T-shaped bolts; the loading mechanism includes : Sensor mounting base (3), pressure sensor (4), loading gland (5), pressure guide bolt (6), pressure adjustment bolt (7), pressurized heightening plate (8), heightening plate fastening screw (9 ), pressure support rod (10), fastening bolt (11), pressure connection seat (12), pressure lock nut (13), spring gland (14), booster spring (15), oil delivery nozzle ( 16), loading block (17), guide seat (18) and flexible thin-walled bearing (19), one end of the above-mentioned pressurized support rod (10) is locked on the support seat (2) by thread, and the other end is passed by two The fastening bolt (11) is connected with the pressure connection seat (12), the pressure adjustment bolt (7) is connected with the pressure connection seat (12) through threads, and the pressure lock nut (13) is arranged on the pressure adjustment bolt (7 ), and one at the front and back; the above-mentioned pressurized heightened plate (8) is locked on the support seat (2) through the heightened plate fastening screw (9), and one end of the spring gland (14) is connected with the pressure adjustment bolt ( 7) contact, the other end is connected with the force spring (15), the loading gland (5) is connected with the sensor mount (3) through the pressure guide bolt (6), and the pressure sensor (4) is installed on the sensor mount ( 3) Between the loading gland (5), the pressure sensor (4) is used to measure the radial force applied by the force spring (15) to the flexible thin-walled bearing (19), and the guide seat (18) is fixed on the support by bolts On the inner side of the seat (2), the loading block (17) is connected with the male thread at one end of the sensor mounting seat (3) through an internal thread hole, and the contact surface of the loading block (17) and the flexible thin-walled bearing (19) is Arc surface; the drive and support mechanism includes: electric spindle (20), electric spindle support seat (21), thimble (22) and thimble support seat (23), and the above electric spindle (20) is fastened by fastening bolts (11) is fixed on the motorized spindle support seat (21), which is used to drive the bearing test installation device. The motorized spindle support seat (21) is fixed on the T-shaped groove of the base (1) through T-shaped locking bolts, and the motorized spindle The support seat (21) is arranged on one side of the loading mechanism, the above-mentioned thimble (22) is fixed on the thimble support seat (23) by fastening screws, and the thimble support seat (23) is fixed on the base (1 ), and the thimble support seat (23) is arranged on the other side of the loading mechanism for supporting the bearing test installation device. 2. The multi-station bearing testing machine according to claim 1, characterized in that: said bearing test installation device includes: a power connection member, a clamping device and a bearing installation sleeve, and the bearing installation sleeve is arranged on the power connection member Between the clamping device and the clamping device, the number can be set according to the actual needs. The clamping device runs through the bearing installation sleeve and is connected with the power connection member; the power connection member includes: pull nail (24) and spindle cutter Handle (25), above-mentioned pulling stud (24) is located at the front end of main shaft handle (25), is fixed on the front end of main shaft handle (25) by threaded connection, and pulling stud (24) adopts standard part head, can be with The pneumatic clamps in the electric spindle (20) are connected; the clamping device includes: clamping bolts (26), gaskets (28) and spring washers (27), and the above-mentioned clamping bolts (26) Through the spring washer (27), the washer (28) and the bearing installation sleeve, the front end of the clamping bolt (26) is provided with an external thread, and is connected with the end of the main shaft handle (25) through a threaded connection, and the spring washer (27) and the gasket (28) are located between the clamping bolt (26) and the last set of bearing installation sleeves, and the end center of the clamping bolt (26) has a conical hole, which is used to cooperate with the thimble (22) Support the bearing test and installation device to improve the rotation accuracy; the bearing installation sleeve includes: bearing installation sleeve (32), front retaining ring (30), rear retaining ring (31), flexible thin-walled bearing (19), bearing lock Tighten the bolts (29) and the set nuts (33), the above-mentioned front retaining ring (30) is located at the front side of the bearing installation sleeve (32), and the rear retaining ring (31) is located at the rear of the bearing installation sleeve (32). side, the bearing locking bolt (29) connects the bearing mounting sleeve (32), the front retaining ring (30) and the rear retaining ring (31) through a set nut (33), and the flexible thin-walled bearing (19) is installed on the on the sleeve (32). 3. The multi-station bearing testing machine according to claim 2, characterized in that: the bearing mounting sleeve (32) and the flexible thin-walled bearing (19) in the bearing testing installation device cooperate with each other at a shoulder of Oval structure. 4. The multi-station bearing testing machine according to claim 3, characterized in that: the front and rear of the bearing mounting sleeve (32) in the bearing mounting sleeve cooperate with each other in an oval trapezoidal structure, and at the same time The front and rear matching end faces of the bearing installation sleeve (32) are provided with pin holes, which can effectively prevent the relative sliding between the two bearing installation sleeves (32). 5. The multi-station bearing testing machine according to claim 1, characterized in that: the loading mechanism is to adjust the pressure on the support rod (10) by collecting the loading force fed back by the pressure sensor (4) The position of the bolt (11) and the pressure adjustment bolt (7) set the size of the loading force. 6. The multi-station bearing testing machine according to claim 1, characterized in that: said loading mechanism and bearing test installation device are provided with four sets of test stations for flexible thin-walled bearings (19), which can also be Requirements set the number of test stations in the loading mechanism and bearing test setup.