CN219104351U

CN219104351U - Bearing testing device

Info

Publication number: CN219104351U
Application number: CN202223435165.0U
Authority: CN
Inventors: 宋献武
Original assignee: Luoyang Ona Bearing Co ltd
Current assignee: Luoyang Ona Bearing Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-05-30
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a bearing testing device which comprises a horizontal base, a driving assembly and a loading assembly, wherein the driving assembly and the loading assembly are arranged on the base. The driving assembly comprises a rotating shaft support fixedly arranged on the base, a rotating shaft which is rotationally connected with the rotating shaft support and used for fixing an inner ring of the bearing to be tested, and a motor fixedly arranged on the base and used for driving the rotating shaft to rotate. The loading assembly comprises a translation part which is arranged on the base in a sliding manner and can slide along the axis direction of the rotating shaft relative to the base, a lifting part which is arranged on the translation part in a sliding manner and can slide vertically relative to the translation part, and an outer ring clamping tool which is fixedly arranged on the lifting part and is used for fixing the outer ring of the bearing to be tested. A translation driving mechanism for driving the translation part is arranged between the translation part and the base, and a lifting driving mechanism for driving the lifting part is arranged between the lifting part and the translation part. The utility model can solve the technical problem that the radial load and the axial load cannot be applied to the bearing to be tested simultaneously in the prior art to test the bearing.

Description

Bearing testing device

Technical Field

The utility model relates to the technical field of bearing testing equipment, in particular to a bearing testing device.

Background

After the bearing design is completed, during trial manufacture, the actual performance of the bearing is typically tested to verify that its parameters meet the design requirements, where it is important to have the bearing tested at rated load.

According to different models, the bearing bears different loads in the working state, such as a deep groove ball bearing, a cylindrical roller bearing and the like, which usually only bear radial force, an angular contact ball bearing, a tapered roller bearing and the like can bear radial force and axial force, and a thrust roller bearing, a thrust needle bearing and the like only bear axial force.

The existing bearing testing device can only test a bearing to be tested under the condition of one of radial or axial load, cannot apply radial load and axial load at the same time, cannot completely simulate the working condition of the bearing which is subjected to radial force and axial force at the same time, and cannot truly reflect the actual condition.

Disclosure of Invention

The utility model aims to provide a bearing testing device which can solve the technical problem that in the prior art, radial load and axial load cannot be applied to a bearing to be tested at the same time to test the bearing.

In order to achieve the above purpose, the present utility model adopts the following technical scheme.

The bearing testing device comprises a horizontal base, a driving assembly and a loading assembly, wherein the driving assembly is arranged on the base and used for fixing and rotating an inner ring of a bearing to be tested, and the loading assembly is arranged on the base and used for fixing an outer ring of the bearing to be tested and applying load.

The driving assembly comprises a rotating shaft support fixedly arranged on the base, a rotating shaft which is connected with the rotating shaft support in a rotating way and is used for fixing an inner ring of a bearing to be tested, and a motor which is fixedly arranged on the base and is used for driving the rotating shaft to rotate.

The loading assembly comprises a translation part which is arranged on the base in a sliding manner and can slide along the axis direction of the rotating shaft relative to the base, a lifting part which is arranged on the translation part in a sliding manner and can slide vertically relative to the translation part, and an outer ring connecting tool which is fixedly arranged on the lifting part and is used for fixing the outer ring of the bearing to be tested. A translation driving mechanism for driving the translation part to move along the axis direction of the rotating shaft relative to the base is arranged between the translation part and the base, and a lifting driving mechanism for driving the lifting part to vertically move relative to the translation part is arranged between the lifting part and the translation part.

Further, the translation part is in sliding connection with the base through the first linear guide rail, and the lifting part is in sliding connection with the lifting part through the second linear guide rail.

Further, the translation driving mechanism comprises a first loading electric cylinder, one end of the first loading electric cylinder is hinged with the base, the other end of the first loading electric cylinder is hinged with the translation part, and the translation driving mechanism is used for pushing the translation part to move relative to the base along the axis direction of the rotating shaft and applying axial load to the bearing to be tested.

The lifting driving mechanism comprises a second loading electric cylinder, one end of the second loading electric cylinder is hinged with the translation part, and the other end of the second loading electric cylinder is hinged with the lifting part and is used for pushing the lifting part to vertically move relative to the translation part and applying radial load to the bearing to be tested.

Further, the axis of the first loading cylinder is parallel to the axis of the rotating shaft, and the axis of the second loading cylinder is perpendicular to the horizontal plane.

Further, the middle part of the rotating shaft is rotationally connected with the rotating shaft support, one end of the rotating shaft is connected with the motor, and the other end of the rotating shaft is fixedly connected with the inner ring of the bearing to be detected through the inner ring connecting tool.

Further, the rotating shaft is rotatably connected with the rotating shaft bracket through two tapered roller bearings which are oppositely arranged.

Further, the rotating shaft is connected with the motor through an elastic coupling.

Further, the inner ring connecting tool is detachably and fixedly connected with the rotating shaft and used for replacing the inner ring connecting tool when the bearings to be tested with different sizes are tested.

Further, the outer ring connection tool is detachably and fixedly connected with the lifting part and used for replacing the outer ring connection tool which is suitable for testing bearings to be tested in different sizes.

Further, the rotational speed of the motor may be adjustable.

After the technical scheme is adopted, the utility model has the following beneficial effects:

1. according to the utility model, the function of applying radial load and axial load to the bearing to be tested is realized by arranging the loading assembly with the translation part and the lifting part, and the radial load, the axial load and the radial load and the axial load can be independently loaded, so that the working state of the bearing can be truly and comprehensively simulated, and the test result is more reliable;

2. according to the technical scheme, the bearing to be tested is fixedly connected to one end of the rotating shaft, so that the bearing to be tested is convenient to detach;

3. according to the technical scheme, the electric cylinder drives the translation part and the lifting part to apply radial and axial loads to the bearing to be tested, the loading range is large, the adjusting precision is high, the first loading electric cylinder and the rotating shaft are coaxially arranged, the second loading electric cylinder is perpendicular to the horizontal plane, and the numerical value of the axial load and the radial load applied to the bearing to be tested can be obtained by reading the thrust data of the first loading electric cylinder and the second loading electric cylinder.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a schematic diagram of the overall structure of the driving assembly in the present utility model.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is a schematic view of the overall structure of the loading assembly of the present utility model.

Fig. 5 is a schematic diagram of a connection mode between the outer ring connection tool and the lifting part in the utility model.

Description of the drawings: 1. the device comprises a base, 2, a driving assembly, 21, a rotating shaft support, 22, a rotating shaft, 221, an end cover, 23, a motor, 24, an inner ring connecting tool, 25, tapered roller bearings, 26, an elastic coupling, 3, a loading assembly, 31, a translation part, 311, a first linear guide rail, 32, a lifting part, 321, a second linear guide rail, 33, an outer ring connecting tool, 34, a translation driving mechanism, 341, a first regulating block, 35, a lifting driving mechanism, 351, a second regulating block, 4 and a bearing to be tested.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the features and performances of a bearing testing apparatus according to the present utility model will be described in further detail with reference to the accompanying drawings and examples.

Referring to fig. 1 to 5, a bearing testing device includes a base 1 with a horizontal upper surface, a driving assembly 2 disposed on the base 1 for fixing and rotating an inner ring of a bearing 4 to be tested, and a loading assembly 3 disposed on the base 1 for fixing an outer ring of the bearing 4 to be tested and applying a load.

The driving assembly 2 comprises a rotating shaft support 21 fixedly arranged on the base 1, a rotating shaft 22 which is rotationally connected with the rotating shaft support 21 and has a horizontal axis and is used for fixing the inner ring of the bearing 4 to be tested, and a motor 23 fixedly arranged on the base 1 and used for driving the rotating shaft 22 to rotate.

Specifically, the middle part of the rotating shaft 22 is rotatably connected with the rotating shaft bracket 21, and in particular, the rotating shaft 22 is rotatably connected with the rotating shaft bracket 21 through two tapered roller bearings 25 which are oppositely arranged, so that the rotating stability can be ensured when the rotating shaft 22 can bear the axial force and the radial force generated in the test. An oil seal for sealing the tapered roller bearing 25 is further provided between the rotating shaft support 21 and the rotating shaft 22 for preventing foreign substances from entering the tapered roller bearing 25 and preventing a lubricating medium for lubricating the tapered roller bearing 25 from flowing out.

One end of the rotating shaft 22 is connected with the motor 23, in particular, the rotating speed of the motor 23 is adjustable, and the rotating shaft 22 is connected with the motor 23 through an elastic coupling 26 for enabling transmission to be smoother.

The other end of the rotating shaft 22 is fixedly connected with the inner ring of the bearing 4 to be tested through an inner ring connecting tool 24, and in particular, the inner ring connecting tool 24 is detachably and fixedly connected with the rotating shaft 22 and is used for replacing the corresponding inner ring connecting tool 24 when testing the bearings 4 to be tested with different sizes.

The loading assembly 3 comprises a translation part 31 which is arranged on the base 1 in a sliding manner and can slide along the axis direction of the rotating shaft 22 relative to the base 1, a lifting part 32 which is arranged on the translation part 31 in a sliding manner and can slide vertically relative to the translation part 31, and an outer ring connecting tool 33 which is fixedly arranged on the lifting part 32 and is used for fixing the outer ring of the bearing 4 to be tested.

Specifically, the translation portion 31 includes a bottom plate and a riser, the bottom plate is horizontally arranged for sliding connection with the upper surface of the base 1, the riser is fixedly arranged on the bottom plate and is perpendicular to the axis of the rotating shaft 22, the riser is used for sliding connection with the lifting portion, and a reinforcing plate for increasing the overall strength is further arranged between the bottom plate and the riser.

A translation driving mechanism 34 for driving the translation part 31 to move along the axis direction of the rotation shaft 22 relative to the base 1 is arranged between the translation part 31 and the base 1, and a lifting driving mechanism 35 for driving the lifting part 32 to vertically move relative to the translation part 31 is arranged between the lifting part 32 and the translation part 31.

Specifically, the translation portion 31 is slidably connected to the base 1 through the first linear rail 311, and the lifting portion 32 is slidably connected to the lifting portion 32 through the second linear rail 321.

The translation driving mechanism 34 includes a first loading electric cylinder, one end of the first loading electric cylinder is hinged to the base 1, the other end of the first loading electric cylinder is hinged to the translation portion 31, and the first loading electric cylinder is used for driving the translation portion 31 to move relative to the base 1 along the axis direction of the rotating shaft 22, and applies an axial load to the bearing 4 to be tested, particularly, the axis of the first loading electric cylinder is parallel to the axis of the rotating shaft 22, and the thrust of the first loading electric cylinder is the axial load applied to the bearing 4 to be tested.

Specifically, a first adjusting block 341 is further arranged between the first loading electric cylinder and the base 1, and when the stroke of the first loading electric cylinder cannot meet the requirement, the defect on the stroke of the first loading electric cylinder can be overcome by adjusting the size of the first adjusting block 341.

The lifting driving mechanism 35 comprises a second loading electric cylinder, one end of the second loading electric cylinder is hinged to the translation part 31, the other end of the second loading electric cylinder is hinged to the lifting part 32, and the second loading electric cylinder is used for driving the lifting part 32 to vertically move relative to the translation part 31 and applying radial load to the bearing 4 to be tested, particularly, the axis of the second loading electric cylinder is perpendicular to the horizontal plane, and the thrust of the second loading electric cylinder is the radial load applied to the bearing 4 to be tested.

Specifically, a second adjusting block 351 is further disposed between the second loading cylinder and the translation portion 31, and when the stroke of the second loading cylinder cannot meet the requirement, the defect on the stroke of the second loading cylinder can be overcome by adjusting the size of the second adjusting block 351.

The outer ring connection tool 33 is detachably and fixedly connected with the lifting part 32 and is used for replacing the outer ring connection tool 33 which is suitable for testing the bearings 4 to be tested in different sizes.

In specific implementation, according to the size of the bearing 4 to be tested, the inner ring connecting tool 24 and the outer ring connecting tool 33 which are matched with each other are prepared in advance, and the inner ring connecting tool 24 and the outer ring connecting tool 33 can be uniformly processed for the bearing to be tested with various types and sizes.

As shown in fig. 3, the inner ring connecting fixture 24 is fixedly connected with the shaft hole of the inner ring of the bearing 4 to be measured through interference fit, and a shaft shoulder for bearing axial force, which is in contact with the end face of the inner ring, is arranged on one side of the inner ring connecting fixture 24. During assembly, a hot-assembling method or a press-assembling method can be used, and as a preferable mode, the interference fit between the inner ring connecting tool 24 and the inner ring of the bearing 4 to be tested is realized by adopting the hot-assembling method in the embodiment.

The inner ring connecting tool 24 is fixedly connected with the rotating shaft 22 in the circumferential direction through a spline, and the inner ring connecting tool 24 is pressed on a shaft shoulder of the rotating shaft 22 through an end cover 221 arranged at the tail end of the rotating shaft 22, so that the inner ring connecting tool 24 is fixedly connected with the rotating shaft 22 in the axial direction.

As shown in fig. 4, the outer ring connection tool 33 is provided with a shaft hole for placing the outer ring of the bearing 4 to be tested and a shaft shoulder for bearing axial load in contact with the end face of the outer ring of the bearing 4 to be tested, and the shaft hole and the outer ring of the bearing 4 to be tested are in excessive fit.

In this embodiment, an angular ball bearing is taken as an example of the bearing 4 to be measured, and the matching relationship between the bearing 4 to be measured and the inner ring connection tool 24 and the outer ring connection tool 33 is shown in fig. 4.

The outer ring connection tool 33 and the lifting part 32 are detachably and fixedly connected, so that the outer ring connection tool 33 which is suitable for replacement is convenient when the bearing 4 to be detected with different sizes is detected. Specifically, as shown in fig. 5, the connection between the outer ring connection fixture 33 and the lifting portion 32 is further provided with a universal design and an adjustable design, the lifting portion 32 is provided with 2 vertical long holes, the outer ring connection fixture 33 is provided with bolt holes matched with the long holes, and the outer ring connection fixture 33 is fixedly connected to the lifting portion 32 through the bolt passing through the long holes and the bolt holes.

Because the length of the long hole in the vertical direction and the width of the long hole are wider than the bolts used for adapting, the outer ring connecting tool 33 has larger vertical adjustment space and a certain transverse adjustment space during installation, so that the operation is more convenient when the bearing 4 to be tested is installed on the testing device.

After the bearing 4 to be measured is fixedly connected to the rotating shaft 22 through the inner ring connecting tool 24, the shaft hole of the outer ring connecting tool 33 is matched with the outer ring of the bearing 4 to be measured, and the shaft shoulder on one side of the shaft hole is abutted against the end face of the outer ring of the bearing 4 to be measured.

The first loading electric cylinder is controlled to push the translation part 31, the translation part 31 drives the lifting part 32 to move to the lifting part 32 to be in contact with the outer ring connecting tool 33, and then the second loading electric cylinder is controlled to adjust the vertical height of the lifting part 32, so that the outer ring connecting tool 33 can be fixed on the lifting part 32 by utilizing bolts to pass through long holes.

After the bearing 4 to be measured has completed the above-described mounting step, the motor 23 is started, and in particular, if the bearing 4 to be measured has a particular specification of the direction of rotation, the rotation of the motor 23 should meet its specification.

The motor 23 drives the rotating shaft 22 to rotate through the elastic coupler 26, the rotating shaft 22 drives the inner ring of the bearing 4 to be tested to rotate relative to the outer ring, and the rotating speed of the inner ring of the bearing 4 to be tested can be changed by adjusting the rotating speed of the motor 23.

The magnitude of the axial load applied to the bearing 4 to be measured can be adjusted by adjusting the thrust of the first loading cylinder, and the magnitude of the radial load applied to the bearing 4 to be measured can be adjusted by adjusting the thrust of the second loading cylinder.

And (3) according to the test requirements, adjusting the radial load and the axial load applied to the bearing 4 to be tested, and maintaining the specified rotating speed and time to finish the test. After the test is completed, the bearing 4 to be tested is disassembled for state analysis, and the test is completed.

The bearing 4 to be measured needs to satisfy the predetermined lubrication condition when performing the load test.

It should be noted that, the radial load and the axial load applied to the bearing 4 to be measured are both static loads, so the stroke of the first loading cylinder and the second loading cylinder mainly acts to adjust the positions of the translation portion 31 and the lifting portion 32, so that the bearing has universality and is convenient for installation of the bearing 4 to be measured. Therefore, the electric cylinder is preferably selected from the small-stroke large-thrust type.

It should be noted that, in this embodiment, the first loading cylinder and the second loading cylinder both apply a load to the bearing 4 to be tested in a pushing manner, so as to explain the working principle of the device. In practical application, the pushing force and the pulling force which can be generated by the electric cylinder are the same, so that the load can be applied to the bearing 4 to be tested by using the pulling force of the electric cylinder.

It should be noted that, in this embodiment, the bearing 4 to be tested is an angular contact ball bearing for illustrating the use method and principle of the present technical solution, and it does not indicate that the present technical solution can only test the angular contact ball bearing. Only the inner ring connecting tool 24 and the outer ring connecting tool 33 which are matched with each other are required to be replaced, so that different types of bearings can be tested.

It should be noted that, in the present embodiment, the parts not described in detail are all prior art, and the above embodiments are only for illustrating the present utility model, but the present utility model is not limited to the above embodiments, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model falls within the protection scope of the present utility model.

Claims

1. The utility model provides a bearing testing arrangement, including upper surface horizontally base (1), establish be used for fixed and rotate on base (1) drive assembly (2) of bearing (4) inner circle that awaits measuring, establish be used for fixed bearing (4) outer lane that awaits measuring and load subassembly (3) of applys the load on base (1), drive assembly (2) are including fixed pivot support (21) of establishing on base (1), be connected and axis horizontally be used for fixed axis of rotation (22) of bearing (4) inner circle that awaits measuring with pivot support (21) rotation, be used for driving axis of rotation (22) pivoted motor (23) on fixed establishing on base (1), its characterized in that: the loading assembly (3) comprises a translation part (31) which is arranged on the base (1) in a sliding manner and can slide along the axis direction of the rotating shaft (22) relative to the base (1), a lifting part (32) which is arranged on the translation part (31) in a sliding manner and can slide vertically relative to the translation part (31), an outer ring connecting tool (33) which is fixedly arranged on the lifting part (32) and is used for fixing an outer ring of the bearing (4) to be tested, a translation driving mechanism (34) which is used for driving the translation part (31) to move relative to the base (1) along the axis direction of the rotating shaft (22) is arranged between the translation part (31) and the translation part (31), and a lifting driving mechanism (35) which is used for driving the lifting part (32) to move vertically relative to the translation part (31) is arranged between the lifting part (32).

2. A bearing testing apparatus as claimed in claim 1, wherein: the translation part (31) is in sliding connection with the base (1) through a first linear guide rail (311), and the lifting part (32) is in sliding connection with the lifting part (32) through a second linear guide rail (321).

3. A bearing testing apparatus as claimed in claim 2, wherein: the translation driving mechanism (34) comprises a first loading electric cylinder, one end of the first loading electric cylinder is hinged with the base (1), the other end of the first loading electric cylinder is hinged with the translation part (31) and is used for driving the translation part (31) to move along the axial direction of the rotating shaft (22) relative to the base (1) and applying axial load to the bearing (4) to be tested,

the lifting driving mechanism (35) comprises a second loading electric cylinder, one end of the second loading electric cylinder is hinged with the translation part (31), and the other end of the second loading electric cylinder is hinged with the lifting part (32) and is used for driving the lifting part (32) to vertically move relative to the translation part (31) and applying radial load to the bearing (4) to be tested.

4. A bearing testing apparatus according to claim 3, wherein: the axis of the first loading cylinder is parallel to the axis of the rotating shaft (22), and the axis of the second loading cylinder is perpendicular to the horizontal plane.

5. A bearing testing apparatus as in claim 4, wherein: the middle part of the rotating shaft (22) is rotationally connected with the rotating shaft bracket (21), one end of the rotating shaft (22) is connected with the motor (23), and the other end of the rotating shaft is fixedly connected with the inner ring of the bearing (4) to be tested through the inner ring connecting tool (24).

6. A bearing testing apparatus according to claim 5, wherein: the rotating shaft (22) is rotatably connected with the rotating shaft bracket (21) through two tapered roller bearings (25) which are oppositely arranged.

7. A bearing testing apparatus according to claim 5, wherein: the rotating shaft (22) is connected with the motor (23) through an elastic coupling (26).

8. A bearing testing apparatus according to claim 5, wherein: the inner ring connecting tool (24) is detachably and fixedly connected with the rotating shaft (22) and is used for replacing the corresponding inner ring connecting tool (24) when testing the bearings (4) to be tested with different sizes.

9. A bearing testing apparatus according to any one of claims 1 to 8, wherein: the outer ring connecting tool (33) is detachably and fixedly connected with the lifting part (32) and is used for replacing the outer ring connecting tool (33) which is suitable for testing the bearings (4) to be tested in different sizes.

10. A bearing testing apparatus according to any one of claims 1 to 8, wherein: the rotation speed of the motor (23) is adjustable.