An axial fatigue testing device
Patent Information
- Application Number
- CN202522225375.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-21
AI Technical Summary
然而，这种测试使减振层产生的振幅较小，减振齿轮的设计寿命较长，导致疲劳测试持续时间较长，效率较低
[0020]本实用新型提供了一种轴向疲劳测试装置。该轴向疲劳测试装置中，振动台通过芯轴与第一固定件相连接，从而使得振动台能够对减振齿轮施加振动；固定机构的两个固定组件能够沿轴向夹持固定第二固定件，从而使第二固定件固定于固定台。当振动台开启后，由于第二固定件被固定，故第一固定件的振幅会完全传递到减振层，操作人员可以根据需要选择振动频率和振幅，从而实现高频次、大变形的轴向疲劳测试，降低了测试时间、提高了测试效率。
Smart Images
Figure CN224802671U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fatigue testing technology, and in particular to an axial fatigue testing device. Background Technology
[0002] During operation, automobiles encounter numerous harsh road conditions, subjecting gears in some internal components to impacts from multiple angles. To mitigate internal shocks and extend service life, damping gears are used in some automotive transmission structures. A damping gear consists of an outer ring, a damping layer, and an inner ring. The damping layer is positioned between the outer and inner rings and achieves damping through its own deformation.
[0003] To ensure the reliability of vibration damping gears, axial fatigue testing of the damping layer is necessary. Existing fatigue testing devices apply axial vibration to the inner ring of the vibration damping gear, causing continuous deformation of the damping layer due to the displacement difference between the inner and outer rings. However, this method results in a relatively small amplitude of vibration generated in the damping layer, leading to a longer design life of the vibration damping gear, a longer fatigue test duration, and lower efficiency. Utility Model Content
[0004] The purpose of this invention is to provide an axial fatigue testing device that can perform high-frequency, large-deformation axial fatigue testing, thereby reducing testing time and improving testing efficiency.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] An axial fatigue testing device is used to perform axial fatigue testing on a vibration damping gear. The vibration damping gear includes a first fixing member, a damping layer, and a second fixing member. The damping layer is disposed between the first fixing member and the second fixing member, and includes:
[0007] A vibration table, wherein the vibration table is provided with a mandrel, the mandrel is connected to the first fixing member, and the vibration table is configured to apply axial vibration to the first fixing member;
[0008] The fixing mechanism includes a fixing platform and two fixing components arranged opposite to each other. Both fixing components are fixedly disposed on the fixing platform, and the fixing components are configured to clamp and fix the second fixing member along the axial direction.
[0009] Preferably, the fixing component includes a fixing base and a pressing member. The fixing base has a first step at its end, and the pressing member is fixedly disposed on the fixing base. The pressing member and the first step can clamp and fix the second fixing member.
[0010] Preferably, the end face of the fixing seat facing the mandrel is located outside the damping layer; and / or,
[0011] All the pressure-absorbing components are located on the outside of the vibration-damping layer.
[0012] Preferably, the height of the first step is less than the thickness of the second fastener.
[0013] Preferably, the mandrel includes a large-diameter section and a small-diameter section, the large-diameter section is connected to the vibration table, the small-diameter section is connected to the first fixing member, and a second step is formed between the large-diameter section and the small-diameter section, the second step being able to be set at the same height as the first step.
[0014] Preferably, the mandrel passes through the first fixing member and is threadedly connected to the fixing nut.
[0015] Preferably, a washer is provided between the fixing nut and the first fixing member.
[0016] Preferably, the axial fatigue testing device further includes a lifting platform, on which the vibration table is mounted, and the lifting platform can be raised and lowered to adjust the height of the vibration table.
[0017] Preferably, the fixing component includes a fixing seat, which includes a vertical section and a horizontal section. The vertical section is fixedly connected to the fixing platform, and the horizontal section is configured to clamp and fix the second fixing member along the axial direction.
[0018] Preferably, the fixing base further includes a base, which is disposed at the bottom end of the vertical section. The area of the base is larger than the cross-sectional area of the vertical section, and the base is fixedly connected to the fixing base.
[0019] The beneficial effects of this utility model are:
[0020] This invention provides an axial fatigue testing device. In this device, a vibration table is connected to a first fixed member via a mandrel, enabling the vibration table to apply vibration to the damping gear. Two fixing components of the fixing mechanism can clamp and fix a second fixed member axially, thus fixing the second fixed member to the fixed table. When the vibration table is turned on, because the second fixed member is fixed, the amplitude of the vibration from the first fixed member is fully transmitted to the damping layer. The operator can select the vibration frequency and amplitude as needed, thereby achieving high-frequency, large-deformation axial fatigue testing, reducing testing time and improving testing efficiency. Attached Figure Description
[0021] Figure 1 This is a cross-sectional view of the axial fatigue testing device described in this embodiment of the present invention;
[0022] Figure 2This is a top view of the fixed vibration damping gear of the axial fatigue testing device according to an embodiment of the present invention;
[0023] Figure 3 yes Figure 2 Sectional view at point AA.
[0024] In the picture:
[0025] 100. Inner ring; 101. Vibration damping layer; 102. Outer ring;
[0026] 1. Vibration table; 11. Mandrel; 111. Large diameter section; 112. Small diameter section; 113. Second step section;
[0027] 2. Fixing mechanism; 21. Fixing platform; 22. Fixing base; 221. Vertical section; 222. Horizontal section; 223. Base; 224. First step section; 23. Pressing component;
[0028] 3. Secure the nuts;
[0029] 4. Washers. Detailed Implementation
[0030] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0034] During operation, automobiles encounter numerous harsh road conditions, subjecting gears in some internal components to impacts from multiple angles. To mitigate internal shocks and extend service life, damping gears are used in some automotive transmission structures. A damping gear consists of an outer ring, a damping layer, and an inner ring. The damping layer is positioned between the outer and inner rings and achieves damping through its own deformation.
[0035] To ensure the reliability of the vibration-damping gears, axial fatigue testing of the damping layer is necessary. This involves applying vibration to either the inner or outer ring. Figures 1-3 As shown, the present invention provides an axial fatigue testing device, which includes a vibration table 1. The vibration table 1 is used to support, fix and apply vibration to the test piece. The test piece will experience fatigue under long-term vibration.
[0036] In some embodiments, the axial fatigue testing device can also perform fatigue testing on other parts, or directly perform fatigue testing on the material (such as rubber) of the damping layer 101, except that the first fixing member needs to be fixed on the test piece, and the vibration table 1 is connected to the first fixing member to apply vibration to the first fixing member.
[0037] In this embodiment, the test piece is described using a vibration damping gear as an example. The inner ring 100 of the vibration damping gear is equivalent to the first fixing member. The vibration table 1 is connected to the inner ring 100, and the vibration table 1 applies vibration to the inner ring 100 of the vibration damping gear.
[0038] In some embodiments, the outer ring 102 of the damping gear serves as a first fixing member. That is, the vibration table 1 can also be used to drive the outer ring 102 of the damping gear to vibrate.
[0039] In this embodiment, the vibration table 1 connected to the inner ring 100 is used as an example for explanation. Applying axial vibration to the inner ring 100 of the damping gear, and causing continuous deformation of the damping layer 101 through the displacement difference between the inner ring 100 and the outer ring 102, is a commonly used fatigue testing method in the prior art. However, this test results in a small amplitude of vibration generated by the damping layer 101, a long design life of the damping gear, and a long fatigue test duration, leading to low efficiency.
[0040] like Figures 1-3As shown, to solve the above problems, this utility model provides an axial fatigue testing device, which includes a vibration table 1 and a fixing mechanism 2. The vibration table 1 is provided with a mandrel 11, which is connected to the inner ring 100. The vibration table 1 is configured to apply axial vibration to the inner ring 100. The fixing mechanism 2 includes a fixing platform 21 and two fixing components arranged opposite to each other. Both fixing components are fixedly installed on the fixing platform 21. The fixing components are configured to clamp and fix the outer ring 102 along the axial direction.
[0041] In this axial fatigue testing device, the vibration table 1 is connected to the inner ring 100 via the mandrel 11, enabling the vibration table 1 to apply vibration to the damping gear. The two fixing components of the fixing mechanism 2 can clamp and fix the outer ring 102 axially, thereby fixing the outer ring 102 to the fixing table 21. When the vibration table 1 is turned on, since the outer ring 102 is fixed, the amplitude of the inner ring 100 will be fully transmitted to the damping layer 101. The operator can select the vibration frequency and amplitude as needed, thereby realizing high-frequency, large-deformation axial fatigue testing, reducing testing time and improving testing efficiency.
[0042] Here, the outer ring 102 is equivalent to the second fixing member. That is to say, if the axial fatigue testing device can also be used to perform fatigue testing on other parts, or to directly perform fatigue testing on the material of the damping layer 101 (such as rubber), the second fixing member needs to be fixed on the test piece, and the fixing component is used to fix the second fixing member, so as to realize high-frequency, large-deformation axial fatigue testing.
[0043] Understandably, the vibration table 1 is positioned below the damping gear, and generally, the area occupied by the vibration table 1 on the horizontal plane is larger than the cross-sectional area of the damping gear. Therefore, there is no space or structure below the damping gear to fix it. To avoid obstructing the vibration table 1, the fixing assembly includes a fixing base 22. The fixing base 22 includes a vertical section 221 and a horizontal section 222. The vertical section 221 is fixedly connected to the fixing table 21, and the horizontal section 222 is configured to clamp and fix the outer ring 102 axially.
[0044] The vertical section 221 can be set on the periphery of the vibration table 1, and the outer ring 102 is fixed by the horizontal section 222, thereby avoiding the vibration table 1. Preferably, the vertical section 221 has a countersunk hole, and the fastening screw passes through the countersunk hole and is threadedly connected to the fixed table 21, so as to fix the fixed seat 22 to the fixed table 21 through the vertical section 221.
[0045] Optionally, the mounting base 22 also includes a base 223, which is located at the bottom end of the vertical section 221. The area of the base 223 is larger than the cross-sectional area of the vertical section 221, and the base 223 is fixedly connected to the mounting base 22. When the vibration table 1 applies vibration to the damping gear, the force of the vibration is transmitted to the horizontal section 222 of the mounting base 22 through the outer ring 102. This causes a torque to be generated on the fastening screw in the mounting base 22, which can easily lead to fatigue fracture of the fastening screw. By using a large-area base 223 on the bottom surface of the vertical section 221, the torsional force on the fastening screw can be greatly reduced through the surface contact between the base 223 and the mounting table 21. Instead, most of the force is applied to the fastening screw along the axial direction, effectively preventing fatigue fracture of the fastening screw.
[0046] To effectively secure the outer ring 102, the fixing assembly also includes a pressing member 23. The end of the fixing base 22 is provided with a first stepped portion 224. The pressing member 23 is fixedly disposed on the fixing base 22, and the pressing member 23 and the first stepped portion 224 can clamp and fix the outer ring 102. The first stepped portion 224 has a supporting surface. When the pressing member 23 is fixed to the fixing base 22, it can press the outer ring 102 against the supporting surface, thereby achieving the clamping and fixing of the outer ring 102.
[0047] It is understandable that neither the first step 224 nor the pressing part 23 should come into contact with the vibration damping layer 101, otherwise it will affect the amplitude of the vibration damping layer 101, thus affecting the test time and the accuracy of the test results.
[0048] like Figures 1-3 As shown, in order to achieve the above purpose, the end face of the fixed seat 22 facing the spindle 11 is located outside the damping layer 101, that is, the inner edge of the first step portion 224 is located outside the damping layer 101, so as to ensure that the first step portion 224 only contacts the outer ring 102 and avoids the first step portion 224 from affecting the vibration of the damping layer 101.
[0049] Similarly, the pressing member 23 is located entirely outside the vibration damping layer 101, that is, the pressing member 23 is completely outside the vibration damping layer 101, so as to ensure that the pressing member 23 only contacts the outer ring 102 and avoids the pressing member 23 affecting the vibration of the vibration damping layer 101.
[0050] In this embodiment, the pressing member 23 is fixed to the upper surface of the horizontal section 222 by a fixing screw. To ensure that the pressing member 23 and the first step portion 224 can clamp the outer ring 102, the height of the first step portion 224 is less than the thickness of the outer ring 102. That is, during the process of fixing the pressing member 23 to the horizontal section 222 by the fixing screw, the pressing member 23 contacts the outer ring 102 before the horizontal section 222. As the fixing screw rotates, the fixing screw presses the pressing member 23 onto the upper surface of the outer ring 102, thereby ensuring that the pressing member 23 and the first step portion 224 can clamp the outer ring 102.
[0051] In this embodiment, the mandrel 11 includes a large-diameter section 111 and a small-diameter section 112. The large-diameter section 111 is connected to the vibration table 1, and the small-diameter section 112 is connected to the inner ring 100. A second step portion 113 is formed between the large-diameter section 111 and the small-diameter section 112. The second step portion 113 can be set at the same height as the first step portion 224. The small-diameter section 112 of the mandrel 11 passes through the inner ring 100. The inner ring 100 falls on the second step portion 113 and is supported and positioned by the second step portion 113. Since the second step portion 113 can be set at the same height as the first step portion 224, the outer ring 102 is also supported by the first step portion 224 at this time, ensuring that the damping layer 101 is in a balanced state before the vibration table 1 is turned on.
[0052] Preferably, the mandrel 11 passes through the inner ring 100 and is threadedly connected to the fixing nut 3. That is, the fixing nut 3 is threadedly connected to the small diameter section 112, which can lock the inner ring 100 to the second step portion 113, ensuring the stability of the damping gear on the mandrel 11, so that the vibration of the vibration table 1 can be completely transmitted to the damping gear.
[0053] Furthermore, a washer 4 is provided between the fixing nut 3 and the inner ring 100. The washer 4 can increase the locking force of the fixing nut 3 on the inner ring 100 through its own elasticity, ensuring that there is no relative movement between the inner ring 100 and the spindle 11, thus improving the accuracy of the test.
[0054] It is worth noting that after long-term use, the vibration table 1 may experience inaccurate stopping position of the mandrel 11, resulting in unequal heights between the first step portion 224 and the second step portion 113. To solve this problem, the axial fatigue testing device also includes a lifting platform, on which the vibration table 1 is mounted. The lifting platform can be raised and lowered to adjust the height of the vibration table 1.
[0055] In the initial stage, the vibration table 1 is first raised using a lifting platform, and a damping gear is installed on the mandrel 11. Then, the inner ring 100 of the damping gear is fixed to the second step 113 of the mandrel 11 using a fixing nut 3 and a washer 4. Next, the lifting platform is lowered until the outer ring 102 just contacts the first step 224. Finally, pressing parts 23 are installed on the two fixed seats 22 to fix the opposite ends of the outer ring 102, completing the assembly. Finally, the amplitude and frequency of the vibration table 1 can be set to perform axial fatigue testing on the damping layer 101.
[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An axial fatigue testing device for performing axial fatigue testing on a damping gear, the damping gear comprising a first fixing member, a damping layer (101), and a second fixing member, the damping layer (101) being disposed between the first fixing member and the second fixing member, characterized in that, include: A vibration table (1) is provided with a mandrel (11) connected to the first fixing member, and the vibration table (1) is configured to apply axial vibration to the first fixing member; The fixing mechanism (2) includes a fixing platform (21) and two fixing components arranged opposite to each other. Both fixing components are fixedly disposed on the fixing platform (21). The fixing components are configured to clamp and fix the second fixing member along the axial direction.
2. The axial fatigue testing device according to claim 1, characterized in that, The fixing component includes a fixing seat (22) and a pressing member (23). The end of the fixing seat (22) is provided with a first step (224). The pressing member (23) is fixedly disposed on the fixing seat (22). The pressing member (23) and the first step (224) can clamp and fix the second fixing member.
3. The axial fatigue testing device according to claim 2, characterized in that, The end face of the fixing seat (22) facing the mandrel (11) is located outside the damping layer (101); and / or, All the pressure-reducing elements (23) are located outside the vibration-damping layer (101).
4. The axial fatigue testing device according to claim 2, characterized in that, The height of the first step (224) is less than the thickness of the second fastener.
5. The axial fatigue testing device according to claim 2, characterized in that, The mandrel (11) includes a large diameter section (111) and a small diameter section (112). The large diameter section (111) is connected to the vibration table (1), and the small diameter section (112) is connected to the first fixing member. A second step (113) is formed between the large diameter section (111) and the small diameter section (112). The second step (113) can be set at the same height as the first step (224).
6. The axial fatigue testing device according to claim 1, characterized in that, The mandrel (11) passes through the first fixing member and is threadedly connected to the fixing nut (3).
7. The axial fatigue testing device according to claim 6, characterized in that, A washer (4) is provided between the fixing nut (3) and the first fixing member.
8. The axial fatigue testing device according to claim 1, characterized in that, The axial fatigue testing device also includes a lifting platform, on which the vibration table (1) is mounted, and the lifting platform can be raised and lowered to adjust the height of the vibration table (1).
9. The axial fatigue testing device according to claim 1, characterized in that, The fixing component includes a fixing seat (22), which includes a vertical section (221) and a horizontal section (222). The vertical section (221) is fixedly connected to the fixing platform (21), and the horizontal section (222) is configured to clamp and fix the second fixing member along the axial direction.
10. The axial fatigue testing device according to claim 9, characterized in that, The fixed seat (22) also includes a base (223), which is located at the bottom of the vertical section (221). The area of the base (223) is larger than the cross-sectional area of the vertical section (221), and the base (223) is fixedly connected to the fixed seat (22).