Bearing testing device
By using an intermediate component to evenly distribute the load in the bearing testing device, the problem of inaccurate test results caused by deformation in bearing radial force testing is solved, achieving higher testing accuracy and device stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AB SKF SKF PATENT DEPARTMENT
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-24
AI Technical Summary
In the existing radial force testing process for bearings, the test results are inaccurate due to deformation.
A bearing testing device comprising a housing, a loading device, and an intermediate component is used. The intermediate component distributes the force evenly to the stress area of the housing through the first and second force transmission surfaces, avoiding local deformation and ensuring test accuracy.
By rationally distributing the load, local deformation of the shell was reduced, thereby improving the accuracy of the test results and the stability of the device.
Smart Images
Figure CN224163354U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a bearing testing device. Background Technology
[0002] Bearings, as key components in modern machinery, support rotating shafts and reduce the coefficient of friction during rotation. The precision, performance, lifespan, and reliability of bearings play a crucial role in the precision, performance, lifespan, and reliability of the host machine. Therefore, radial force testing of bearings is an important step in ensuring their quality and reliability.
[0003] In existing bearing radial force testing processes, a certain radial force is typically applied to the bearing using a testing device to simulate its actual working condition. However, this applied radial force often causes deformation of the bearing under test. Bearing deformation introduces errors during the testing process, making the test results inaccurately reflect the bearing's true performance. Such inaccurate test results may mislead bearing equipment manufacturers and users.
[0004] Therefore, there is a need for a device that can effectively solve the problem of inaccurate test results caused by bearing deformation during radial force testing. Utility Model Content
[0005] In response to the problems and needs mentioned above, this disclosure proposes a bearing testing device that solves the aforementioned problems and brings other technical benefits by adopting the following technical features.
[0006] This disclosure discloses a bearing testing apparatus, comprising: a housing having a receiving space for accommodating a bearing to be tested; a loading device for applying a radial test force; and an intermediate component located between the loading device and the housing to transmit the force from the loading device to the housing, and further to the outer peripheral surface of the bearing to be tested. The intermediate component includes a first force-transmitting surface and a second force-transmitting surface spaced apart from each other to transmit the force to a first force-bearing region and a second force-bearing region spaced apart from each other on the housing; wherein the first force-transmitting surface and the second force-transmitting surface are arranged symmetrically with respect to a plane passing through the axis of rotation of the bearing to be tested and parallel to the direction of the radial test force.
[0007] According to a preferred embodiment, the intermediate component has a first leg and a second leg extending from the plate-shaped body toward the housing, and the first force-transmitting surface and the second force-transmitting surface are the end surfaces of the first leg and the second leg, respectively.
[0008] According to a preferred embodiment, the intermediate component has a plate-shaped body, from which the first leg and the second leg extend.
[0009] According to a preferred embodiment, the housing has a flat outer surface, which includes the first stress-bearing region, the second stress-bearing region, and a non-stress-bearing region located between the first stress-bearing region and the second stress-bearing region.
[0010] According to a preferred embodiment, the loading device includes a hydraulic cylinder.
[0011] According to a preferred embodiment, the bearing to be tested is a first bearing to be tested, and the housing space is also used to accommodate a second bearing to be tested; the first force transmission surface and the second force transmission surface are the first pair of force transmission surfaces of the intermediate component, and the intermediate component further includes a second pair of force transmission surfaces axially spaced from the first pair of force transmission surfaces.
[0012] According to a preferred embodiment, the second pair of force transmission surfaces includes a third force transmission surface and a fourth force transmission surface to transmit force to the spaced-apart third and fourth force-bearing regions of the housing, wherein the third force transmission surface and the fourth force transmission surface are arranged symmetrically with respect to a plane passing through the axis of rotation of the bearing under test and parallel to the radial test force direction.
[0013] According to a preferred embodiment, the intermediate component has a plate-shaped body and a third leg and a fourth leg extending from the plate-shaped body toward the housing, wherein the first force-transmitting surface and the second force-transmitting surface are the end surfaces of the third leg and the fourth leg, respectively.
[0014] According to a preferred embodiment, the bearing testing device further includes a central shaft, on which the bearing to be tested is mounted.
[0015] According to a preferred embodiment, the intermediate component is secured to the housing by fasteners passing through the first leg and the second leg.
[0016] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings so that the features and advantages of the present disclosure can be readily understood. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments of this disclosure will be briefly described below. The drawings are merely illustrative of some embodiments of this disclosure and are not intended to limit all embodiments of this disclosure to them.
[0018] Figure 1A A cross-sectional view of a bearing testing apparatus according to an exemplary embodiment of the present disclosure is shown. Figure 1B The thinner, more variable region T of the shell is shown;
[0019] Figure 2 A perspective view of an exemplary intermediate component presented in this disclosure is shown;
[0020] Figure 3 It shows Figure 2 A side view of the middle component;
[0021] Figure 4 It shows Figure 2 A top view of the middle component;
[0022] Figure 5 It shows Figure 2 Another view of the middle component;
[0023] Figure 6 A schematic diagram of a bearing testing apparatus according to another exemplary embodiment of the present disclosure is shown.
[0024] List of reference numerals
[0025] 1. Shell
[0026] 11 First stress zone
[0027] 12 Second stress zone
[0028] 13 Non-stressed areas
[0029] 2. Intermediate components
[0030] 21 First leg
[0031] 22 Second leg
[0032] 23 Third leg
[0033] 24 Fourth leg
[0034] 25 First force transmission surface
[0035] 26 Second force transmission surface
[0036] 27 plate body
[0037] 3. Bearing under test
[0038] 31 Bearing bushing
[0039] 4. Loading device
[0040] 5. Central axis
[0041] 6 Framework Detailed Implementation
[0042] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0043] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this disclosure may have fewer components, other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.
[0044] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes.
[0045] This disclosure relates to a bearing testing apparatus capable of applying radial force to the bearing under test to test bearing performance.
[0046] This bearing testing device includes a bearing holding part for holding the bearing under test, a loading device for applying radial test force to the bearing under test, and an intermediate component for achieving reasonable distribution of radial test force.
[0047] The bearing under test holding portion may include a housing 1 having a receiving space for accommodating the bearing under test 3. The receiving space of the housing 1 may be, for example, a cylindrical receiving space. In some exemplary embodiments, the receiving space of the housing 1 is adapted to accommodate only one bearing under test 3. In other embodiments, the receiving space of the housing 1 includes a first receiving space portion and a second receiving space portion for accommodating a first bearing under test, and the first receiving space portion and the second receiving space portion may be receiving spaces that are connected to each other.
[0048] The loading device 4 is used to apply the radial test force required for the testing process. The radial test force is applied directly or indirectly to the housing 1, and thus directly or indirectly acts on the bearing 3 under test. In an exemplary embodiment, the loading device 4 is a hydraulic cylinder, such as an electro-hydraulic cylinder or a pneumatic hydraulic cylinder. By precisely controlling the pressure and flow rate of the hydraulic oil, the hydraulic cylinder can stably and uniformly apply the radial force, ensuring the reliability of the testing process. In other embodiments, the loading device 4 can be other types of power devices such as linear motors.
[0049] In order to avoid local deformation of the holding part of the bearing under test 3 due to the application of radial test force during the test, which would affect the accuracy of the test results, this disclosure designs an intermediate component 2 in the bearing testing device to redistribute the test load in a reasonable manner, thereby significantly reducing the local deformation of the holding part of the bearing under test and improving the accuracy of the test results.
[0050] The intermediate component 2 is located between the loading device 4 and the housing 1 to transmit the force from the loading device 4 to the housing 1, and then to the outer peripheral surface of the bearing 3 under test. During the transmission of force from the loading device 4 to the housing 1, the intermediate component 2 appropriately distributes the load.
[0051] The intermediate component 2 includes a first force-transmitting surface 25 and a second force-transmitting surface 26 spaced apart from each other. The intermediate component 2 directly or indirectly receives forces from the loading device 4 and transmits these forces downstream to the spaced-apart first force-bearing region 11 and second force-bearing region 12 of the housing 1 via the first force-transmitting surface 25 and the second force-transmitting surface 26. The first force-transmitting surface 25 and the second force-transmitting surface 26 are arranged symmetrically with respect to a plane passing through the rotation axis of the bearing under test 3 and parallel to the radial test force direction.
[0052] Figure 1AThe plane A, indicated by the dashed line, passes through the axis of rotation of the bearing under test 3 and is parallel to the radial test force direction. This plane should not be interpreted as strictly passing through the axis of rotation of the bearing under test 3 and strictly parallel to the radial test force direction, but rather allowing for a reasonable range of error. By providing an intermediate component 2 comprising a first force transmission surface 25 and a second force transmission surface 26 arranged symmetrically with respect to plane A and spaced apart from each other, the force from the loading device 4 is redistributed by the intermediate component 2, thus preventing force from acting on the thinner, more volatile region T of the housing 1. In a comparative example without the intermediate component 2, the housing 1 is highly susceptible to compressive deformation towards the bearing under test 3 at region T. The deformed portion of the housing 1 compresses the outer ring of the bearing under test 3, causing deformation of the outer ring. Taking a deep groove ball bearing as an example, this deformation results in fewer balls bearing the load. This creates a higher stress distribution in narrow areas, especially in thin-shell tests, thus affecting the true results of the bearing radial force measurement.
[0053] Preferably, the housing 1 has a flat outer surface, which includes a first force-bearing region 11 and a second force-bearing region 12 that receive forces from the first force-transmitting surface 25 and the second force-transmitting surface 26 of the intermediate component 2, respectively. The flat outer surface is easy to process and manufacture, and facilitates the installation and positioning of the intermediate component 2, ensuring a precise fit between the intermediate component 2 and the housing 1. Between the first force-bearing region 11 and the second force-bearing region 12, the flat outer surface of the housing 1 includes a non-force-bearing region 13. This non-force-bearing region 13 is traversed by the plane A. Therefore, the surface area of the housing 1 traversed by the plane A does not bear the force from the loading device 4, greatly reducing deformation problems in this area.
[0054] In an alternative embodiment, the housing 1 may have other forms of outer surface, such as the first stress region 11 and the second stress region 12 of the housing 1 being higher than / protruding from the non-stress region 13 between them.
[0055] Preferably, the intermediate component 2 has at least two legs, namely a first leg 21 and a second leg 22, and a first force-transmitting surface 25 and a second force-transmitting surface 26 are the end surfaces of the first leg 21 and the second leg 22, respectively. Preferably, the end surfaces of the first leg 21 and the second leg 22 are flat surfaces. Preferably, the end surfaces of the first leg 21 and the second leg 22 have the same shape and area. Preferably, the intermediate component 2 has a plate-shaped body 27, from which the first leg 21 and the second leg 22 extend toward the housing 1.
[0056] The bearing testing apparatus disclosed herein can be suitable for measuring only one bearing 3 under test, or it can be a bearing testing apparatus capable of simultaneously measuring two or more bearings 3 under test.
[0057] For a device measuring only one bearing 3 under test, the intermediate component 2 may only have a first leg 21 and a second leg 22. The end surfaces of the first leg 21 and the second leg 22 form a pair of spaced-apart force transmission surfaces, which respectively abut against the first force-bearing area 11 and the second force-bearing area 12 of the housing 1. Thus, force is transmitted to the housing 1 via the first leg 21 and the second leg 22, and then to the bearing 3 under test. As mentioned above, the first force transmission surface 25 and the second force transmission surface 26 are arranged symmetrically with respect to a plane A that passes through the axis of rotation of the bearing 3 under test and is parallel to the radial test force direction.
[0058] For a bearing testing device measuring two bearings 3 under test, the intermediate component 2 may have a first leg 21, a second leg 22, a third leg 23, and a fourth leg 24. The end surfaces of the first leg 21 and the second leg 22 form a first force transmission surface 25 and a second force transmission surface 26, i.e., a first pair of force transmission surfaces. The end surfaces of the third leg 23 and the fourth leg 24 form a third force transmission surface and a fourth force transmission surface, i.e., a second pair of force transmission surfaces. The first pair of force transmission surfaces and the second pair of force transmission surfaces are axially spaced to correspond to the axial positions of the first and second bearings under test, respectively. The first force transmission surface 25 and the second force transmission surface 26 are arranged symmetrically with respect to a plane passing through the rotation axis of the bearings under test and parallel to the radial test force direction. Similarly, the third force transmission surface and the fourth force transmission surface are arranged symmetrically with respect to a plane passing through the rotation axis of the bearings under test and parallel to the radial test force direction.
[0059] Similarly, in a device for measuring multiple bearings, the intermediate component 2 may have multiple pairs of legs, thereby forming multiple pairs of force transmission surfaces.
[0060] Furthermore, in embodiments not shown, for a bearing testing device measuring two bearings under test, two intermediate components 2 may be provided, referred to as the first intermediate component and the second intermediate component, respectively. Each intermediate component 2 has only a first leg 21 and a second leg 22. The force from the loading device 4 is transmitted to the first bearing under test through the first intermediate component 2 and to the second bearing under test through the second intermediate component 2.
[0061] Figure 6 A bearing testing device capable of testing two bearings 3 under test is shown. Figures 2 to 5 An exemplary intermediate component 2 for a dual-bearing test apparatus is shown.
[0062] like Figures 2 to 5As shown, the intermediate component 2 has a plate-shaped body 27 and first legs 21, second legs 22, third legs 23, and fourth legs 24 extending from the plate-shaped body 27. Preferably, the first legs 21, second legs 22, third legs 23, and fourth legs 24 extend parallel to each other. Preferably, the first legs 21, second legs 22, third legs 23, and fourth legs 24 have end surfaces of the same shape and area, thus the intermediate component 2 has the same four force-transmitting surfaces. Preferably, the first legs 21, second legs 22, third legs 23, and fourth legs 24 have rectangular end surfaces. The end surfaces of the first legs 21 and second legs 22 form the first pair of force-transmitting surfaces of the intermediate component 2, and the end surfaces of the third legs 23 and fourth legs 24 form the second pair of force-transmitting surfaces of the intermediate component 2. After installation, as... Figure 6 As shown, the axial position of the first pair of force-transmitting surfaces coincides with the axial position of the first bearing under test, and the axial position of the second pair of force-transmitting surfaces coincides with the axial position of the second bearing under test. The first bearing under test and the second bearing under test are spaced apart axially, and correspondingly, the first pair of force-transmitting surfaces and the second pair of force-transmitting surfaces are also spaced apart axially. The radial test force from the loading device 4 is transmitted via the first leg 21 and the second leg 22 to the first force-bearing area 11 and the second force-bearing area 12 of the housing 1, and then to the first bearing under test. The radial test force from the loading device 4 is transmitted via the third leg 23 and the fourth leg 24 to the third force-bearing area and the fourth force-bearing area of the housing 1, and then to the second bearing under test.
[0063] The central component with four legs not only reduces the number of components but also distributes the radial test force more evenly to multiple stress areas of the housing, optimizing the force transmission path, reducing local housing deformation, and thus improving test accuracy and device stability.
[0064] Preferably, as shown in Figures 1 and 6, the bearing testing apparatus further includes a central shaft 5. The central shaft 5 is configured to rotate about its own axis of rotation. One or more bearings 3 to be tested are mounted on the central shaft 5. In the scenario where the bearing 3 to be tested includes an inner ring and an outer ring, during testing, the inner ring of the bearing 3 to be tested is fixed to the central shaft 5 and rotates synchronously with the central shaft 5. Figure 6 In one embodiment, the housing 1 contains a first bearing to be tested and a second bearing to be tested, both of which are mounted on the central shaft 5.
[0065] Preferably, such as Figure 1AAs shown, the bearing testing apparatus also includes a bearing bushing 31 surrounding the bearing 3 under test and housed in the housing 1. The bearing bushing 31 is primarily used for testing small-sized bearings, providing additional support and protection to ensure stable installation and operation of the small bearing during testing. For large-sized bearings, the bearing bushing can be omitted. Thus, the bearing testing apparatus can also be applied to various bearings of different sizes under test.
[0066] Preferably, the bearing testing device further includes a frame 6. The frame 6 is a supporting structure for the bearing testing device, supporting the central shaft 5 and the housing 1. The specific structure of the frame 6 is not limited. Preferably, the central shaft 5 is rotatable relative to the frame 6 via one or more supporting bearings.
[0067] Preferably, such as Figure 2 and 4 As shown, the intermediate component 2 is provided with a through hole, so that the intermediate component 2 can be fixed to the housing 1 of the bearing testing device via fasteners such as bolts passing through the through hole. Preferably, the through hole is provided through the leg of the intermediate component 2, so as... Figure 1A Bolts pass through the through-hole to secure the intermediate component 2 to the housing 1. The bolted connection provides a cost-effective and robust assembly, effectively ensuring a stable connection between the intermediate component and the housing during testing, preventing displacement and loosening due to vibration or impact.
[0068] The exemplary implementation of the solution proposed in this disclosure has been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.
Claims
1. A bearing testing device, characterized in that, include: The housing (1) has a receiving space for accommodating the bearing (3) to be tested; Loading device (4) is used to apply radial test force; The intermediate component (2) is located between the loading device (4) and the housing (1) to transmit the force from the loading device (4) to the housing (1), and then to the outer peripheral surface of the bearing (3) to be tested; The intermediate component (2) includes a first force transmission surface (25) and a second force transmission surface (26) spaced apart from each other to transmit force to a first force-bearing region (11) and a second force-bearing region (12) spaced apart from each other in the housing (1). The first force transmission surface (25) and the second force transmission surface (26) are arranged symmetrically with respect to the plane (A) that passes through the rotation axis of the bearing under test (3) and is parallel to the radial test force direction.
2. The bearing testing device as described in claim 1, characterized in that, The intermediate component (2) has a plate-shaped body (27) and a first leg (21) and a second leg (22) extending from the plate-shaped body (27) toward the housing (1).
3. The bearing testing device as described in claim 2, characterized in that, The first force transmission surface (25) and the second force transmission surface (26) are the end surfaces of the first leg (21) and the second leg (22), respectively.
4. The bearing testing device as described in claim 1, characterized in that, The housing (1) has a flat outer surface, which includes the first stress region (11), the second stress region (12), and a non-stress region (13) located between the first stress region (11) and the second stress region (12).
5. The bearing testing device as described in claim 1, characterized in that, The loading device (4) includes a hydraulic cylinder.
6. The bearing testing device as described in claim 2, characterized in that, The bearing to be tested (3) is the first bearing to be tested, and the housing (1) can also accommodate the second bearing to be tested. The first force transmission surface (25) and the second force transmission surface (26) are the first pair of force transmission surfaces of the intermediate component (2), and the intermediate component (2) also includes a second pair of force transmission surfaces axially spaced from the first pair of force transmission surfaces.
7. The bearing testing device as described in claim 6, characterized in that, The second pair of force transmission surfaces includes a third force transmission surface and a fourth force transmission surface to transmit force to the spaced-apart third and fourth force-bearing regions of the housing (1), wherein the third force transmission surface and the fourth force transmission surface are arranged symmetrically with respect to a plane passing through the axis of rotation of the bearing under test and parallel to the radial test force direction.
8. The bearing testing device as described in claim 7, characterized in that, The intermediate component (2) has a plate-shaped body (27) and a third leg (23) and a fourth leg (24) extending from the plate-shaped body (27) toward the housing (1), the third force transmission surface and the fourth force transmission surface being the end surfaces of the third leg (23) and the fourth leg (24), respectively.
9. The bearing testing device as described in claim 1, characterized in that, The bearing testing device also includes a central shaft (5), on which the bearing to be tested (3) is mounted.
10. The bearing testing device as described in claim 2, characterized in that, The intermediate component (2) is secured to the housing (1) by fasteners passing through the first leg (21) and the second leg (22).