CN110333075A - A kind of bearing life test device - Google Patents

Abstract

The invention discloses a bearing life testing device, which comprises a support assembly, a workbench is arranged on the support assembly, a plurality of sets of test assemblies for fixing the bearing to be tested are arranged on the workbench, and the test assemblies can move along the radial direction of the workbench , the test assembly includes a base, a fixing seat for fixing the bearing to be tested, a pressure device for applying pressure to the bearing to be tested, and a pressure sensor arranged between the pressure device and the fixing seat, and a Crossed roller guide rail, the base is provided with a fixed plate for fixing the base and the worktable, and the lower part of the worktable is provided with a rotating disk matching the bearing to be tested and a driving device for driving the rotating disk to rotate along its axial direction ; During detection, the upper surface of the rotating disk is in conflict with the outer peripheral surface of the bearing to be tested, and the bearing to be tested rotates together with the rotating disk. The bearing life testing device of the present invention can not only detect multiple groups of bearings with different rotational speeds simultaneously, but also have more accurate detection data.

Description

A bearing life testing device

technical field

The invention relates to the technical field of bearing detection, in particular to a bearing life testing device.

Background technique

In the prior art, bearings are an indispensable and important component in mechanical products. As a key component, bearings will often cause serious consequences if they are damaged during use. Therefore, it is necessary to determine the maintenance interval according to the service life of the bearings.

In the prior art, in order to evaluate the service life of the bearing in the product, the bearing is often installed on the product for destructive testing. This method can accurately test the service life of the bearing, but the cost is high, the cycle is long, and the operation is complicated. In addition, there is also a test device for testing bearing life in the prior art, but when the outer diameter changes due to bearing wear, the response of the test mechanism is not sensitive, resulting in inaccurate test data, and when the driving motor rotates at a fixed speed, the linear speed of the bearing cannot Adjustment, it is impossible to detect bearings with different speeds at the same time.

Therefore, it is necessary to develop a bearing life testing device that can simultaneously detect bearings of different speeds and has more accurate detection data.

Contents of the invention

In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a bearing life testing device, which can simultaneously test multiple sets of bearings with different rotating speeds, and the testing data is more accurate.

The present invention adopts following technical scheme to realize:

A bearing life testing device includes a bracket assembly, a workbench is arranged on the bracket assembly, and a plurality of test assemblies for fixing the bearing to be tested are arranged on the workbench, and the test assemblies can move along the radial direction of the workbench, and the test assemblies include A base set on the workbench, a fixing seat set on the base for fixing the bearing to be tested, a pressurizing device for applying pressure to the bearing to be tested, and a pressure sensor arranged between the pressurizing device and the fixing seat, the fixing seat There is a cross roller guide rail between the base and the base, and there are multiple sets of slide grooves on the workbench for sliding cooperation with the base. The base is provided with a fixing plate for fixing the base and the workbench. A rotating disk matched with the bearing to be tested and a driving device for driving the rotating disk to rotate along its axial direction; during detection, the upper surface of the rotating disk is in conflict with the outer peripheral surface of the bearing to be tested, and the bearing to be tested rotates together with the rotating disk.

Further, the workbench is arranged coaxially with the rotating disk, the bearing to be tested is located under the workbench, and the axis of the bearing to be tested is arranged along the horizontal direction.

Further, the pressurizing device includes a pressure plate sleeve, a guide shaft slidably connected with the pressure plate sleeve, an elastic body sleeved on the outside of the guide shaft, and a force screw for driving the pressure plate sleeve to slide relative to the guide shaft. The force screw is arranged on the base On the seat, the guide shaft is connected with the pressure sensor.

Further, a gland shaft is arranged between the force screw and the pressure plate sleeve, and a first bearing is arranged between the gland shaft and the pressure plate sleeve, and the first bearing is a thrust ball bearing.

Further, the gland shaft is provided with a first threaded hole matched with the force applying screw, and the base is provided with a second threaded hole matched with the force applied screw.

Further, one end of the elastic body is connected with the pressure plate sleeve, and the other end of the elastic body is connected with the guide shaft, and the elastic body is a compression spring.

Further, the driving device includes a driving motor arranged on the bracket assembly, a driving shaft matched with the rotating disk, and a shaft coupling connecting the driving motor and the driving shaft.

Further, the bracket assembly is provided with a partition for fixing the workbench, the partition is provided with a through hole matched with the drive shaft, the drive shaft is sleeved with a bearing assembly above the partition, and the partition is provided with a The bearing assembly is axially limited by the bearing housing and end cover.

Further, the bearing assembly includes a second bearing and a third bearing, the second bearing is arranged above the third bearing, the second bearing is a tapered roller bearing, and the third bearing is a deep groove ball bearing.

Further, the drive shaft is fixedly connected to the rotating disk through a connecting plate and a cover.

Compared with the prior art, the beneficial effects of the present invention are:

By setting a workbench on the support assembly, multiple sets of test components for fixing the bearing to be tested are set on the workbench, the test components can move along the radial direction of the workbench, and multiple sets of slide grooves are set on the workbench for sliding cooperation with the base , the base is provided with a fixing plate for fixing the base and the workbench, and below the workbench is provided with a rotating disk matching the bearing to be tested and a technical means for driving the rotating disk to rotate along its axial direction, When testing, the upper surface of the rotating disk is in conflict with the outer peripheral surface of the bearing to be tested, and the bearing to be tested rotates with the rotating disk. By adjusting the position of the test assembly relative to the workbench, it is possible to simultaneously detect multiple groups of bearings to be tested at different speeds. Purpose: By setting the base, the fixing seat for fixing the bearing to be tested, the pressurizing device for applying pressure to the bearing to be tested, and the pressure sensor arranged between the pressurizing device and the fixing seat, the fixing seat and the base are provided with The technical means of the cross roller guide makes it possible to accurately transmit the floating and outer diameter changes of the bearing to be tested to the pressure sensor when the bearing to be tested is worn, so that the whole test device can monitor the state of the bearing to be tested in real time and reflect it in the pressure On the sensor, the accuracy of the test data has been improved.

Description of drawings

Fig. 1 is the perspective view of the bearing life testing device of the embodiment of the present invention;

Fig. 2 is the front view of the bearing life testing device of the embodiment of the present invention;

Fig. 3 is the top view of the bearing life testing device of the embodiment of the present invention;

Fig. 4 is the view after the sectional view of the AA section in Fig. 3 is rotated 135° clockwise;

5 is a perspective view of a transmission part of an embodiment of the present invention;

Fig. 6 is the front view of the transmission part in Fig. 5;

Fig. 7 is a top view of the transmission part in Fig. 5;

FIG. 8 is a view after the sectional view of the BB section in FIG. 7 is rotated clockwise by 135°.

In the figure: 10, bracket assembly; 11, worktable; 111, chute; 12, partition; 121, through hole; 20, base; 21, fixed seat; 22, fixed plate; 23, cross roller guide rail; 30. Pressurizing device; 31. Pressure plate sleeve; 32. Guide shaft; 33. Elastic body; 34. Force screw; 35. Gland shaft; 36. First bearing; 40. Pressure sensor; 50. Rotary disk; 60 , drive device; 61, drive motor; 62, drive shaft; 63, coupling; 64, bearing seat, 65, end cover; 66, second bearing, 67, third bearing; 70, connecting plate; 80, seal Cover; 90, the bearing to be tested.

Detailed ways

Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

The transmission part in Figure 5-7 refers to the part of the bearing life test device after the bracket assembly, workbench and partition are removed.

The bearing life testing device as shown in Figure 1-8, comprises support assembly 10, and support assembly 10 is provided with workbench 11, and workbench 11 is provided with multiple groups of test assemblies (not shown) for fixing bearing 90 to be tested ), the test assembly can move along the radial direction of the workbench 11, the test assembly includes a base 20 arranged on the workbench 11, a holder 21 arranged on the base 20 for fixing the bearing 90 to be tested, the bearing 90 to be tested The pressing device 30 for applying pressure and the pressure sensor 40 arranged between the pressing device 30 and the fixed seat 21, the cross roller guide rail 23 is arranged between the fixed seat 21 and the base 20, and multiple sets of The chute 111 that is slidingly fitted with the base 20, the base 20 is provided with a fixing plate 22 for fixing the base 20 and the workbench 11, and the bottom of the workbench 11 is provided with a rotating disk 50 matching with the bearing 90 to be tested and A driving device 60 for driving the rotating disk 50 to rotate along its axial direction; during detection, the upper surface of the rotating disk 50 is in conflict with the outer peripheral surface of the bearing 90 to be tested, and the bearing 90 to be tested rotates together with the rotating disk 50 .

By setting a workbench 11 on the bracket assembly 10, a plurality of sets of test assemblies for fixing the bearing 90 to be tested are arranged on the workbench 11, and the test assemblies can move along the radial direction of the workbench 11. The chute 111 of the seat 20 is slidably fitted, and the base 20 is provided with a fixed plate 22 for fixing the base 20 and the workbench 11, and the bottom of the workbench 11 is provided with a rotating disk 50 matched with the bearing 90 to be tested and used for The technical means of the driving device 60 that drives the rotating disk 50 to rotate along its axial direction, so that during detection, the upper surface of the rotating disk 50 is in conflict with the outer peripheral surface of the bearing 90 to be tested, and the bearing 90 to be tested rotates together with the rotating disk 50. By adjusting The position of the test assembly relative to the workbench 11 can realize the purpose of simultaneously detecting multiple sets of bearings 90 with different rotational speeds; The pressurizing device 30 and the pressure sensor 40 arranged between the pressurizing device 30 and the fixed seat 21, the technical means of the cross roller guide rail 23 is arranged between the fixed seat 21 and the base 20, so that when the bearing 90 to be tested is worn , can accurately transmit the floating and outer diameter changes of the bearing 90 to be tested to the pressure sensor 40, so that the whole testing device can monitor the state of the bearing 90 to be tested in real time, and reflect it on the pressure sensor 40, thereby improving the accuracy of the test data.

The crossed roller guide 23 is a low-friction, high-precision linear motion system. Compared with the linear guide rail, the cross roller guide rail 23 has the advantages of small size, small vibration, high straightness, and stable force in multiple directions. By setting the cross roller guide rail 23, when the bearing 90 to be tested wears out, the fixed seat 21 will move down accordingly, so that the bearing 90 to be tested is always in contact with the rotating disk 50, and at the same time the floating and outer diameter changes of the bearing 90 to be tested It is transmitted to the pressure sensor 40, so that the whole test device can monitor the state of the bearing 90 to be tested in real time, and it is reflected on the pressure sensor 40, which improves the accuracy of the test data. In addition, the relative positions of the fixing seat 21 and the base 20 can also be adjusted through the cross roller guide rail 23 to realize the detection of bearings with different outer diameters.

As a preferred embodiment, the table 11 is arranged coaxially with the rotating disk 50 , the bearing 90 to be tested is located under the table 11 , and the axis of the bearing 90 to be tested is arranged along the horizontal direction. By adjusting the position of the test assembly relative to the workbench 11, and then adjusting the radial position of the test assembly and the rotating disk 50, under the condition that the rotation speed of the driving device 60 is fixed, the adjustment of the rotation speed of the bearing 90 to be tested can be realized, and then multiple tests can be detected simultaneously. A group of bearings 90 to be tested with different rotation speeds, compared with the prior art that can only rely on the driving motor 61 to adjust the rotation speed of the bearings 90 to be tested, and can only test the bearings 90 to be tested at the same rotation speed at the same time, the test range of this testing device is wider. Widely, when the rotational speed of the driving device 60 reaches the limit, the rotational speed of the bearing 90 to be tested can be further increased by adjusting its position.

As a preferred embodiment, the pressurizing device 30 includes a pressure plate sleeve 31, a guide shaft 32 slidingly connected with the pressure plate sleeve 31, an elastic body 33 sleeved on the outside of the guide shaft 32, and is used to drive the pressure plate sleeve 31 to slide relative to the guide shaft 32. The applying force screw 34 is arranged on the base 20, and the guiding shaft 32 is connected with the pressure sensor 40. The pressing screw 34 drives the pressure plate sleeve 31 to slide relative to the guide shaft 32 , and applies pressure to the guide shaft 32 through the elastic body 33 , and then transmits the pressure to the fixing seat 21 and the bearing 90 to be tested through the pressure sensor 40 . Preferably, the pressure sensor 40 has its own display screen, which can display the pressure value in real time.

As a preferred embodiment, a gland shaft 35 is disposed between the force screw 34 and the pressure plate sleeve 31 , and a first bearing 36 is disposed between the gland shaft 35 and the pressure plate sleeve 31 , and the first bearing 36 is a thrust ball bearing. The setting of the first bearing 36 can ensure that the force applying screw 34 does not generate torque to the entire testing device while applying pressure, thereby ensuring the stability of the entire testing device. Preferably, the gland shaft 35 is provided with a first threaded hole (not shown) matched with the applying screw 34 , and the base 20 is provided with a second threaded hole (not shown) matched with the applying screw 34 . The force applying screw 34 is fixedly connected with the gland shaft 35 through the first threaded hole, and moves downward in a spiral relative to the base 20 through the second threaded hole to apply downward pressure, which is not only simple in structure, but also easy to operate.

As a preferred embodiment, one end of the elastic body 33 is connected to the pressure plate sleeve 31 , the other end of the elastic body 33 is connected to the guide shaft 32 , and the elastic body 33 is a compression spring. The compression spring can withstand axial pressure. When the force screw 34 moves downward, the pressure plate sleeve 31 is driven to move downward to compress the elastic body 33, and the elastic body 33 drives the guide shaft 32 to move downward, and the pressure is transmitted to the The fixed base 21 and the bearing 90 to be tested.

As a preferred embodiment, the driving device 60 includes a driving motor 61 arranged on the bracket assembly 10 , a driving shaft 62 matched with the rotating disk 50 , and a coupling 63 connecting the driving motor 61 and the driving shaft 62 . The bracket assembly 10 is provided with a dividing plate 12 for fixing the workbench 11, the dividing plate 12 is provided with a through hole 121 matched with the drive shaft 62, and the driving shaft 62 is sleeved with a bearing assembly (not shown) above the dividing plate 12 As shown), the partition 12 is provided with a bearing seat 64 and an end cover 65 for axially limiting the bearing assembly. The lower part of the drive shaft 62 is provided with a spline groove (not shown), and the output shaft of the coupling 63 is provided with a spline (not shown) matching the spline groove. The splines and the spline grooves cooperate to make the disassembly and assembly of the coupling 63 and the drive shaft 62 more convenient. The spline grooves of the drive shaft 62 are directly inserted into the splines of the coupling 63, and the drive motor 61 passes through the coupling 63. Drive the drive shaft 62 to rotate, and then drive the rotating disk 50 to rotate.

As a preferred embodiment, the bearing assembly includes a second bearing 66 and a third bearing 67, the second bearing 66 is arranged above the third bearing 67, the second bearing 66 is a tapered roller bearing, and the third bearing 67 is a deep groove ball bearings. The setting of the tapered roller bearing and the deep groove ball bearing can limit the radial swing and ensure the stability of the rotating disk 50 in operation. Preferably, the drive shaft 62 is fixedly connected to the rotating disk 50 through the connecting plate 70 and the cover 80 .

The bearing life testing device of the embodiment of the present invention has the following advantages:

1. It can simultaneously detect the bearings 90 to be tested with different outer diameters and different rotational speeds;

2. By adjusting the radial position of the bearing to be tested 90 relative to the rotating disk 50 to realize the adjustment of the rotational speed, when the rotational speed of the motor reaches the limit, the rotational speed of the bearing to be tested 90 can be further increased;

3. By adding the cross roller guide rail 23, the floating and outer diameter change of the bearing 90 to be tested can be accurately transmitted to the pressure sensor 40, so that the whole testing device can monitor the state of the bearing 90 to be tested in real time, and reflect it on the pressure sensor 40 ;

4. Thrust ball bearings are added below the force applying screw 34, which will not generate torque to the entire testing device while applying pressure, ensuring the stability of the entire testing device.

The above-mentioned embodiment is only a preferred embodiment of the present invention, and cannot be used to limit the protection scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims (10)

1. a kind of bearing life test device, including bracket component, it is characterised in that: be provided with work on the bracket component Platform is provided with multiple groups on the workbench for fixing the test suite of bearing to be measured, and the test suite can be along the work Make moving radially for platform, the test suite includes the pedestal being set on the workbench, is set on the pedestal and is used for The fixing seat of fixed bearing to be measured applies stressed pressurizing device to bearing to be measured and is set to the pressurizing device and described Pressure sensor between fixing seat is provided with crossed roller guide rail, the workbench between the fixing seat and the pedestal On be provided with multiple groups and sliding slot that the pedestal is slidably matched, be provided on the pedestal for fixing the pedestal and the work Make the fixed plate of platform, the rotating disk matched with bearing to be measured is provided with below the workbench and for driving the rotation The driving device that turntable is axially rotated along it；When detection, the upper surface of the rotating disk and the outer peripheral surface of bearing to be measured are inconsistent, Bearing to be measured is rotated together in company with the rotating disk.

2. bearing life test device as described in claim 1, it is characterised in that: the workbench and the rotating disk are coaxial Setting, bearing to be measured are located at the lower section of the workbench, and the axis of bearing to be measured is horizontally disposed.

3. bearing life test device as described in claim 1, it is characterised in that: the pressurizing device include pressing plate set, with Guiding axis that the pressing plate set is slidably connected, the elastomer being sheathed on outside the guiding axis and for driving the pressing plate The force screw of set guiding axis sliding relatively, the force screw are set on the pedestal, the guiding axis with it is described Pressure sensor is connected.

4. bearing life test device as claimed in claim 3, it is characterised in that: the force screw and the pressing plate cover it Between be provided with gland axis, first bearing is provided between the gland axis and pressing plate set, the first bearing is thrust ball Bearing.

5. bearing life test device as claimed in claim 4, it is characterised in that: the gland axis is provided with and the force The first threaded hole that screw matches, the pedestal are provided with the second threaded hole matched with the force screw.

6. bearing life test device as claimed in claim 3, it is characterised in that: one end of the elastomer and the pressing plate Set is connected, and the other end of the elastomer is connected with the guiding axis, and the elastomer is compressed spring.

7. bearing life test device as described in claim 1, it is characterised in that: the driving device is described including being set to Driving motor on bracket component, the drive shaft matched with the rotating disk and it connect the driving motor and the drive The shaft coupling of moving axis.

8. bearing life test device as claimed in claim 7, it is characterised in that: be provided on the bracket component for solid Determine the partition of the workbench, is provided with the through-hole matched with the drive shaft on the partition, the drive shaft is described It is arranged with bearing assembly above partition, the bearing for carrying out axial limiting to the bearing assembly is provided on the partition Seat and end cap.

9. bearing life test device as claimed in claim 8, it is characterised in that: the bearing assembly include second bearing and 3rd bearing, the second bearing are set to the top of the 3rd bearing, and the second bearing is tapered roller bearing, described 3rd bearing is deep groove ball bearing.

10. bearing life test device as claimed in claim 8, it is characterised in that: the drive shaft and the rotating disk are logical Cross connecting plate, capping is fixedly connected.