Strength testing tool and method for a support ear of a shock absorber oil reservoir

Abstract

The present application relates to the technical field of quality detection, in particular to a kind of test tool and method for the strength of lug of shock absorber oil reservoir.The test tool includes positioning sleeve, first connecting plate and abutting plate.The cross section of positioning sleeve is annular with notch;The first connecting plate is fixedly connected with the outer peripheral wall of positioning sleeve;The cross section of abutting plate is arc;Two ends of the arc profile of abutting plate are fixedly connected with the inner peripheral wall of positioning sleeve;Abutting plate is convex towards notch;Wherein, the state that oil reservoir is arranged in positioning sleeve, abutting plate abuts oil reservoir, and the part of inner peripheral wall of positioning sleeve away from abutting plate abuts oil reservoir.This solves the problem of how to facilitate the detection of the lug connection strength of shock absorber oil reservoir.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quality detection, in particular to a support lug strength test tool and method for a shock absorber oil reservoir. BACKGROUND

[0002] In the production and assembly process of the shock absorber oil reservoir, a support lug needs to be precisely installed on the outer wall of the oil reservoir. The support lug is firmly combined with the oil reservoir through spot welding. The support lug is used to achieve precise positioning of the oil reservoir on the vehicle and ensure that the oil reservoir is in the correct position during vehicle operation.

[0003] Since the connection strength of the support lug and the oil reservoir directly affects the safety and performance stability of the shock absorber and even the entire vehicle, in order to ensure that the welding strength between the support lug and the oil reservoir strictly meets the various requirements of actual use, strength testing must be performed. The strength testing needs to comprehensively inspect the firmness of the welding position, so as to ensure the reliability of the installation and use of the oil reservoir on the vehicle. However, the current method of testing the connection strength by welding two connecting plates on the oil reservoir to exert a pulling force on the oil reservoir and the support lug is relatively cumbersome. SUMMARY

[0004] To solve the problem of how to conveniently detect the connection strength of the support lug of the shock absorber oil reservoir, the present application provides a support lug strength test tool and method for a shock absorber oil reservoir.

[0005] In a first aspect, the present application provides a support lug strength test tool for a shock absorber oil reservoir, which comprises:

[0006] A positioning sleeve, the cross section of the positioning sleeve is an annular with a notch;

[0007] A first connecting plate, the first connecting plate is fixedly connected with the outer peripheral wall of the positioning sleeve;

[0008] A contact plate, the cross section of the contact plate is an arc line; the two ends of the arc line profile of the contact plate are fixedly connected with the inner peripheral wall of the positioning sleeve; the contact plate is convex towards the notch;

[0009] Wherein, in the state that the oil reservoir is arranged in the positioning sleeve, the contact plate abuts against the oil reservoir, and the part of the inner peripheral wall of the positioning sleeve away from the contact plate abuts against the oil reservoir.

[0010] In some embodiments, in a reference cross section, the distance between the contact plate and the notch gradually increases along a first direction; the center axis of the positioning sleeve is located in the reference cross section.

[0011] In some embodiments, the cross section of the contact plate is an elliptical arc line.

[0012] In some embodiments, the end surface of the abutment plate along the arc profile in the second direction has a radius of curvature that is 2-4 times the average radius of curvature of the positioning sleeve.

[0013] In some embodiments, the cross section of the positioning sleeve comprises a first arc segment and two second arc segments; the two ends of the first arc segment are connected to the two second arc segments respectively; the radius of curvature of the first arc segment is greater than the radius of curvature of the second arc segment; the ends of the second arc segments away from the first arc segment are free ends; and the gap is between the free ends of the two second arc segments.

[0014] In a second aspect, the present application provides a method for testing the strength of the lug of an oil reservoir of a shock absorber, which is applied to the tool for testing the strength of the lug of the oil reservoir of the shock absorber in any one of the first aspect, and the method comprises the following steps:

[0015] Placing the test tool in a preset position of a tensile testing machine;

[0016] Based on the test tool being located in the preset position, controlling the first clamping part of the tensile testing machine to clamp the first connecting plate of the test tool, and the tensile testing machine being in a first clamping state;

[0017] Welding a second connecting plate on the lug of the oil reservoir;

[0018] Based on the welding of the second connecting plate being completed and the tensile testing machine being in the first clamping state, threading the oil reservoir into the positioning sleeve of the test tool, and making the second connecting plate pass out of the gap of the positioning sleeve; and the first connecting plate being fixedly connected to the positioning sleeve;

[0019] Based on the oil reservoir being located in the positioning sleeve, controlling the second clamping part of the tensile testing machine to clamp the second connecting plate, and the tensile testing machine being switched to a second clamping state;

[0020] Based on the tensile testing machine being in the second clamping state, controlling the first clamping part and the second clamping part to apply a pulling force in opposite directions to test the connection strength of the lug.

[0021] In some embodiments, based on the tensile testing machine being in the second clamping state, controlling the first clamping part and the second clamping part to apply a pulling force in opposite directions to test the connection strength of the lug, comprising:

[0022] Based on the tensile testing machine being in the second clamping state, controlling the first clamping part and the second clamping part to apply a first pulling force respectively;

[0023] Based on the holding time of the first tension reaching a first preset time, controlling the first clamping part and the second clamping part to cancel the first tension, and switching the tensile testing machine to a third clamping state;

[0024] Based on the pull-out testing machine being in the third clamping state, controlling the second clamping part to release the second connecting plate, and accumulating a first separation time;

[0025] Based on the first separation time reaching a second preset time, controlling the second clamping portion to clamp the second connecting plate, and switching the pull-out testing machine to a fourth clamping state;

[0026] Based on the pull-out testing machine being in the fourth clamping state, the first clamping part and the second clamping part are controlled to apply a second tensile force respectively to test the connection strength of the support lug.

[0027] In some embodiments, the second tension is greater than the first tension.

[0028] In some embodiments, upon completion of a test of the oil storage cylinder, the oil storage cylinder in the test tool is disassembled;

[0029] Based on the next oil storage cylinder to be tested, the process returns to welding the second connecting plate to the lug of the oil storage cylinder.

[0030] In some embodiments, upon completion of the oil storage cylinder test, disassembling the oil storage cylinder from the test fixture includes:

[0031] Upon completion of the test of one of the oil storage cylinders, the oil storage cylinder in the test fixture is disassembled, and the cumulative number of tests of the test fixture is increased by 1;

[0032] The first pulling force is positively correlated with the number of tests.

[0033] In order to solve the problem of how to conveniently detect the connection strength of the lug of the shock absorber oil reservoir, the present invention has the following advantages:

[0034] By providing a resistance plate with an arc cross-section, fixedly connected to the inner circumferential wall of the positioning sleeve at both ends of the arc profile and convex toward the notch, when the oil storage cylinder is inserted into the positioning sleeve, the resistance plate and the part of the inner circumferential wall of the positioning sleeve away from the resistance plate jointly abut the oil storage cylinder, and the resistance plate can deform synchronously with the deformation of the positioning sleeve to press against the oil storage cylinder, which can enhance the positioning stability of the oil storage cylinder in the positioning sleeve, thereby improving the accuracy of the positioning of the oil storage cylinder, and ultimately solving the problem of the oil storage cylinder being skewed in the positioning sleeve due to the excessively long cantilever structure, and the problem of the reduction of the abutting force of the resistance plate after repeated use of the test tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic view of a bracket strength test tool for a shock absorber reservoir of an embodiment is shown;

[0036] Figure 2 A side view of the bracket strength test tool for the shock absorber reservoir of Figure 1 is shown;

[0037] Figure 3 A front view of the bracket strength test tool for the shock absorber reservoir of Figure 1 is shown;

[0038] Figure 4 A cross-sectional view of the front view of the bracket strength test tool for the shock absorber reservoir of Figure 3 is shown;

[0039] Figure 5 A flowchart of a bracket strength test method for a shock absorber reservoir of an embodiment is shown.

[0040] Reference numerals: positioning sleeve 10; first arc segment 11; second arc segment 12; notch 13; first connecting plate 20; abutting plate 30; reservoir 40; barrel 41; bracket 42; second connecting plate 50. DETAILED DESCRIPTION

[0041] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be appreciated that these embodiments are discussed only for the purposes of enabling those with ordinary skill in the art to better understand and thus practice the present disclosure, and are not intended to limit the scope of the present disclosure in any way.

[0042] As used herein, the term "includes" and its variants are to be read as open-ended terms that mean "including, but not limited to." The term "based on" is to be construed as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment." The term "another embodiment" is to be read as "at least one other embodiment." The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and similar terms are used for orientation or positional relationship based on the orientation or position as shown in the drawings. These terms are used merely for the purpose of description and are not meant to limit the indicated device, element, or component to a particular orientation or configuration, unless otherwise specified. Also, the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and the like are used only to describe the particular orientation of the components, unless otherwise specified. These terms can have other meanings in context with other embodiments. To the extent that the terms "including," "includes," "including," "includes," "including," or "includes," are used in either the detailed description or the claims, they are used in the sense of "including but not limited to," "including but not limited to," and "including but not limited to," respectively, and not in the sense of "consisting of," "consisting of," and "consisting of," respectively. The term "and / or" means "and" or "or." The term "about" means ±10% of the indicated value. The term "substantially" means more than about 95% of the indicated value. The terms "coupled," "connected," and "in communication with" are used in the sense of being directly or indirectly connected or in communication, i.e., one or more intervening components can be present. The terms "first," "second," and the like are used to distinguish between similar elements unless the context indicates otherwise. The term "plurality" means two or more.

[0043] In the production and assembly process of the shock absorber oil reservoir 40, the lug 42 needs to be installed on the outer wall of the oil reservoir 40, which is connected to the oil reservoir 40 by spot welding, and its main function is to realize the positioning of the oil reservoir 40 on the vehicle. In order to ensure that the welding strength between the lug 42 and the oil reservoir 40 meets the use requirements, special strength tests need to be carried out. It is relatively cumbersome to weld two connecting plates on the oil reservoir 40. Therefore, the test of the present application adopts an open sleeve which is sleeved on the outer wall of the oil reservoir 40, so that the lug 42 is in the opening of the sleeve; At the same time, two connecting plates are provided, one of which is connected to the lug 42, and the other is provided on the side of the sleeve away from the opening. By simultaneously applying tension to the two connecting plates, the lug 42 is broken, thereby completing the strength test of the lug 42 of the shock absorber oil reservoir 40.

[0044] However, due to the overlong cantilever structure of the oil reservoir 40 itself, the oil reservoir 40 is prone to be positioned skewly in the positioning sleeve 10. Thus, the overlong cantilever structure is difficult to maintain a stable posture in the sleeve, thereby affecting the accuracy and reliability of the test.

[0045] Embodiment one:

[0046] In this embodiment, in order to solve the above problems, the present application provides a lug 42 strength test tool for a shock absorber oil reservoir 40, as shown in Figure 1 、 Figure 2 、 Figure 3 The lug 42 strength test tool for the shock absorber oil reservoir 40 includes a positioning sleeve 10, a first connecting plate 20 and a contact plate 30.

[0047] The cross section of the positioning sleeve 10 is annular with a notch 13. The notch 13 can leave a space for the lug 42 on the oil reservoir 40. At the same time, the annular structure of the positioning sleeve 10 can wrap the oil reservoir 40 to provide preliminary positioning for the oil reservoir 40.

[0048] The first connecting plate 20 is fixedly connected with the outer peripheral wall of the positioning sleeve 10 to provide a connecting fulcrum for the test device, so that the oil reservoir 40 is connected with the driving equipment, thereby facilitating the driving equipment to exert a pulling force on the positioning sleeve 10.

[0049] In order to facilitate the positioning sleeve 10 to be sleeved on the outer wall of the oil reservoir 40, the inner diameter of the positioning sleeve 10 is greater than the outer diameter of the oil reservoir 40, thereby facilitating the connection of the positioning sleeve 10 and the oil reservoir 40. However, this will cause a certain gap between the positioning sleeve 10 and the oil reservoir 40 when testing the strength of the lug 42 of the oil reservoir 40, thereby affecting the accuracy of the test result. Therefore, the present application sets the contact plate 30, the cross section of the contact plate 30 is an arc, the two ends of the arc profile of the contact plate 30 are fixedly connected with the inner peripheral wall of the positioning sleeve 10, and the contact plate 30 is convex towards the notch 13. When the oil reservoir 40 is sleeved in the positioning sleeve 10, the contact plate 30 abuts against the oil reservoir 40, and the part of the inner peripheral wall of the positioning sleeve 10 away from the contact plate 30 abuts against the oil reservoir 40. The gap between the positioning sleeve 10 and the oil reservoir 40 is compensated by the contact plate 30. When testing the strength of the lug 42 of the oil reservoir 40, due to the fact that the two ends of the arc profile of the contact plate 30 are fixedly connected with the inner peripheral wall of the positioning sleeve 10, the pulling force of the first connecting plate 20 will cause the positioning sleeve 10 to deform, at this time, the two ends of the contact plate 30 deform towards the direction of the first connecting plate 20, and the middle part of the contact plate 30 deforms towards the opposite direction and stably abuts against the outer wall of the oil reservoir 40, thereby achieving accurate positioning of the oil reservoir 40 and avoiding the oil reservoir 40 from shaking.

[0050] Furthermore, in the reference section, the reference section can be Figure 4 As shown in the cross section, the distance between the contact plate 30 and the notch 13 gradually increases along the first direction. Figure 4 From left to right, the central axis of the positioning sleeve 10 lies within the reference cross-section. The contact plate is located on the side of the positioning sleeve 10's central axis away from the notch 13. This allows the contact plate 30 to provide a certain degree of guidance as the oil reservoir 40 moves in the first direction until it reaches the end of the positioning sleeve 10, where it is positioned using the larger radius of curvature. This prevents the oil reservoir 40 from wobbling within the positioning sleeve 10.

[0051] Furthermore, the cross section of the contact plate 30 is an elliptical arc. Utilizing the characteristics of the elliptical arc, when performing a tensile test on the lug 42 of the oil reservoir 40, the cross section of the contact plate 30 can be set to a longer length, that is, the minor axis is set to a longer length, thereby allowing the contact plate 30 to have a wider range of deformation, thereby increasing the service life of the contact plate.

[0052] Furthermore, the curvature radius of the arc profile of the end face of the contact plate 30 along the second direction is 2 to 4 times the average curvature radius of the positioning sleeve 10. The second direction is opposite to the first direction. Figure 2 When the positioning sleeve 10 is deformed by tension, the abutment plate 30 can deform more smoothly due to its larger curvature radius, ensuring that its center can stably abut against the outer wall of the oil storage barrel 40, thereby enhancing the positioning effect of the oil storage barrel 40 and preventing the oil storage barrel 40 from shaking during the test.

[0053] Furthermore, if Figure 2 As shown, the cross-section of the positioning sleeve 10 includes a first arc segment 11 and two second arc segments 12. The first arc segment 11 connects to the two second arc segments 12 at each end, providing space for the oil reservoir 40 to pass through. Furthermore, the radius of curvature of the first arc segment 11 is greater than that of the second arc segment 12. This allows a larger area of ​​contact between the outer wall of the oil reservoir 40 near the lug 42 and the second arc segment 12, further enhancing the stability of the oil reservoir 40 within the positioning sleeve 10. Furthermore, the end of the second arc segment 12 distal from the first arc segment 11 is a free end. A notch 13 is formed between the free ends of the two second arc segments 12. This notch 13 accommodates the lug 42 on the oil reservoir 40, facilitating the application of tensile force to the lug 42 for testing.

[0054] In some other embodiments, the positioning sleeve 10 is arc-shaped, and the curvature radius of the end surface arc profile of the abutment plate 30 in the second direction is equal to the average curvature of the positioning sleeve 10. Alternatively, the curvature radius of the end surface arc profile of the abutment plate 30 in the second direction is calculated according to the average curvature of the first arc segment 11 and the two end second arc segments 12. In this way, the abutment plate 30 is adapted to the positioning sleeve 10, and when the positioning sleeve 10 is subjected to a pulling force, the abutment plate 30 is prone to deformation and abuts against the outer peripheral wall of the positioning sleeve 10, thereby avoiding the shaking of the oil storage cylinder 40 in the positioning sleeve 10.

[0055] Further, the oil storage cylinder 40 comprises a cylinder body 41 and a lug 42, the cylinder body 41 is fixedly connected with the lug 42, when the oil storage cylinder 40 is sleeved in the positioning sleeve 10, part of the cylinder body 41 is located in the surrounding space of the positioning sleeve 10, part of the outer wall of the cylinder body 41 abuts against the middle position of the abutment plate 30, and the lug 42 is located in the gap 13.

[0056] Embodiment Two:

[0057] In this embodiment, as shown in Figure 5 the embodiment two provides a lug 42 strength test method of the shock absorber oil storage cylinder 40, which is applied to the lug 42 strength test tool of the shock absorber oil storage cylinder 40 in any one of the embodiment one, and the lug 42 strength test method of the shock absorber oil storage cylinder 40 comprises steps S10-S60, which can be described in detail below:

[0058] Step S10, place the test tool in the predetermined position of the tensile testing machine, which can provide a stable reference position for subsequent clamping operation and strength test, ensure that the test process is carried out according to the preset process, and achieve the standardization effect of test preparation. When the test tool is in the predetermined position, the axis of the positioning sleeve 10 is horizontally arranged, and the gap 13 of the positioning sleeve 10 is arranged downward.

[0059] Step S20, based on the test tool being in the predetermined position, control the first clamping part of the tensile testing machine to clamp the first connecting plate 20 of the test tool, and the tensile testing machine is in the first clamping state. The test tool can be fixed, which provides a stable basis for the subsequent installation and test of the oil storage cylinder 40, so as to ensure that the test tool does not displace when subjected to stress, and achieve the effect of stable clamping.

[0060] Step S30, weld the second connecting plate 50 on the lug 42 of the oil storage cylinder 40. The second clamping part of the tensile testing machine can provide a larger clamping area, and the full welding mode can ensure the firmness of the connection between the second connecting plate 50 and the lug 42. Compared with the connection strength of the point welding between the lug 42 and the oil storage cylinder 40, the former has higher strength. Avoiding the connection loosening when the pulling force is applied, and achieving the effect of facilitating subsequent clamping and force transmission.

[0061] Step S40, based on the second connecting plate 50 being welded and the pull testing machine being in the first clamping state, the oil reservoir 40 is inserted into the positioning sleeve 10 of the test tool along the second direction, and the second connecting plate 50 is inserted out of the gap 13 of the positioning sleeve 10. The fixed connection of the first connecting plate 20 and the positioning sleeve 10 can realize the correct assembly of the oil reservoir 40 and the test tool, ensure that the lug 42 is in a testable position, and thus prepare for subsequent clamping and tension application, achieving the effect of assembly in place.

[0062] Step S50, based on the oil reservoir 40 being located in the positioning sleeve 10, the second clamping part of the pull testing machine is controlled to clamp the second connecting plate 50, the pull testing machine is switched to the second clamping state, and the tension application point of the lug 42 can be formed, realizing the clamping preparation of the tension test, and achieving the effect of complete clamping of the test component.

[0063] Step S60, based on the pull testing machine being in the second clamping state, the first clamping part and the second clamping part are controlled to apply tension in opposite directions. Through the action of tension, the stress condition of the lug 42 in actual use can be simulated, and the connection strength between the lug 42 and the oil reservoir 40 is tested, so as to judge whether the welding quality meets the requirements.

[0064] Further, step S60 includes steps S61-S65, and the lug 42 strength testing method of the shock absorber oil reservoir 40 sequentially executes steps S10, S20, S30, S40, S50, S61, S62, S63, S64, and S65. Steps S61-S65 will be described in detail below:

[0065] Since the end of the oil reservoir 40 far from the inserted end may be warped when the oil reservoir 40 is placed in the test tool, resulting in inaccurate positioning of the oil reservoir 40, step S61 is executed. Based on the pull testing machine being in the second clamping state, the first clamping part and the second clamping part are controlled to apply a first tension respectively. The position of the oil reservoir 40 is adjusted by the first tension, so that the center axis of the oil reservoir 40 coincides with the center axis of the test tool, ensuring the accuracy of the positioning of the oil reservoir 40.

[0066] Step S62, based on the pressure maintaining time length of the first tension reaching a first preset time length, by maintaining pressure to the first preset time length, it is ensured that the center axis of the oil reservoir 40 is horizontally arranged, avoiding that the first tension pressure maintaining time is too short, the position of the oil reservoir 40 is not adjusted in place, resulting in errors in test results. Then the first clamping part and the second clamping part are controlled to cancel the first tension, and the pull testing machine is switched to a third clamping state.

[0067] Step S63, based on the fact that the pull testing machine is in the third clamping state, the second clamping part is controlled to release the second connecting plate 50, the first separation duration is accumulated, and the second clamping part is completely separated from the second connecting plate 50.

[0068] Step S64, based on the fact that the first separation duration reaches a second preset duration, the second clamping part is controlled to clamp the second connecting plate 50, the pull testing machine is switched to a fourth clamping state, and the stability of the connection between the second clamping part and the second connecting plate 50 is ensured.

[0069] Step S65, based on the fact that the pull testing machine is in the fourth clamping state, the first clamping part and the second clamping part are controlled to apply a second pulling force respectively, and the connection strength of the lug 42 is tested. Since the first pulling force is only used to adjust the position of the oil reservoir 40, the holding duration of the first pulling force does not need to be too long, while the second pulling force is used to test the connection strength of the oil reservoir 40 and the lug 42, and a relatively long holding duration is required. Therefore, the holding duration of the first pulling force is less than that of the second pulling force. Thus, the connection strength of the lug 42 is tested, and the accuracy of the test result is finally improved.

[0070] Further, by using a second pulling force greater than a first pulling force, the situation that the abutting plate 30 causes the oil reservoir 40 to be tilted upward away from the lug 42 due to excessive abutting force is avoided. Therefore, a smaller first pulling force can help the oil reservoir 40 to be positioned horizontally and stably.

[0071] In other embodiments, the method for testing the strength of the lug 42 of the shock absorber oil reservoir 40 further includes steps S70 and S80, and the method for testing the strength of the lug 42 of the shock absorber oil reservoir 40 sequentially includes steps S10, S20, S30, S40, S50, S60, S70.

[0072] Step S70, based on the fact that the test of one oil reservoir 40 is completed, the oil reservoir 40 in the test tooling is disassembled. By disassembling the oil reservoir 40 in time after the test of one oil reservoir 40 is completed, the test tooling space is released for the next oil reservoir 40 to be tested, the test tooling is prevented from being occupied to affect the subsequent test progress, the continuity of the test process is ensured, and the effect of efficiently completing the tests of multiple oil reservoirs 40 is achieved.

[0073] Step S80, based on the next oil reservoir 40 to be tested, return to perform welding of the second connecting plate 50 on the lug 42 of another oil reservoir 40. By the next oil reservoir 40 to be tested, return to perform the step of welding the second connecting plate 50 on the lug 42, it can ensure that each oil reservoir 40 to be tested is pre-processed according to a unified process, ensure that the preparation work before testing of each oil reservoir 40 is consistent, so that the subsequent test conditions are the same, improve the accuracy and comparability of the test results, and finally realize the standardized test of multiple oil reservoirs 40.

[0074] Further, step S70 includes step S71, the lug 42 strength test method of the shock absorber oil reservoir 40 sequentially executes step S10, step S20, step S30, step S40, step S50, step S60, step S71, the following can be described in detail for step S70 including step S71:

[0075] Step S71, based on the completion of the test of one oil reservoir 40, disassemble the oil reservoir 40 in the test tool, and accumulate the test number of the test tool by 1. The first pulling force is positively correlated with the test number. Since the test tool needs to be used repeatedly, the deformation amplitude of the abutment plate 30 is larger, which is more likely to cause the oil reservoir 40 to be away from the end of the test tool. Therefore, the first pulling force required is larger, so as to ensure the positioning accuracy of the oil reservoir 40 and the test tool.

[0076] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual application, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A tool for testing the strength of a bracket of an oil reservoir of a shock absorber, characterized by comprising: The ear strength test tool of the shock absorber oil reservoir comprises: A positioning sleeve with a cross-section in the shape of an annulus with a notch; A first connecting plate fixedly connected to the outer peripheral wall of the positioning sleeve; A contact plate with a cross-section in the shape of an arc; the two ends of the arc profile of the contact plate are fixedly connected to the inner peripheral wall of the positioning sleeve; the contact plate is convex towards the notch; Wherein, when the oil reservoir is inserted into the positioning sleeve, the contact plate abuts against the oil reservoir, and the part of the inner peripheral wall of the positioning sleeve away from the contact plate abuts against the oil reservoir.

2. The ear strength test tool of the shock absorber oil reservoir according to claim 1, wherein: In a reference cross-section, the distance between the contact plate and the notch gradually increases along a first direction; the center axis of the positioning sleeve is located in the reference cross-section; and the first direction is the direction of the center axis of the positioning sleeve from left to right.

3. The ear strength test tool of the shock absorber oil reservoir according to claim 1, wherein: The cross-section of the contact plate is in the shape of an elliptical arc.

4. The ear strength test tool of the shock absorber oil reservoir according to claim 2, wherein: The curvature radius of the end surface arc profile of the contact plate along a second direction is 2-4 times the average curvature radius of the positioning sleeve; and the second direction is opposite to the first direction.

5. The ear strength test tool of the shock absorber oil reservoir according to claim 2, wherein: The cross-section of the positioning sleeve comprises a first arc segment and two second arc segments; the two ends of the first arc segment are connected to the two second arc segments, respectively; the curvature radius of the first arc segment is greater than that of the second arc segment; the end of the second arc segment away from the first arc segment is a free end; and the free ends of the two second arc segments form the notch.

6. A method for testing the strength of the ear of an oil reservoir of a shock absorber, applied to the tool for testing the strength of the ear of an oil reservoir of a shock absorber according to any one of claims 1 to 5, characterized in that, The ear strength test method of the shock absorber oil reservoir comprises: Placing the test tool in a preset position of a tensile testing machine; Based on the test tool being located in the preset position, controlling a first clamping part of the tensile testing machine to clamp a first connecting plate of the test tool, and the tensile testing machine being in a first clamping state; Welding a second connecting plate on the ear of the oil reservoir; Based on the welding of the second connecting plate being completed and the tensile testing machine being in the first clamping state, inserting the oil reservoir into a positioning sleeve of the test tool, and making the second connecting plate pass out of the notch of the positioning sleeve; the first connecting plate is fixedly connected to the positioning sleeve; Based on the oil reservoir being located in the positioning sleeve, controlling a second clamping part of the tensile testing machine to clamp the second connecting plate, and the tensile testing machine being switched to a second clamping state; Based on the tensile testing machine being in the second clamping state, controlling the first clamping part and the second clamping part to apply a pulling force in opposite directions, and testing the connecting strength of the ear.

7. The ear strength test method of the shock absorber oil reservoir according to claim 6, wherein: Based on the fact that the pull testing machine is in the second clamping state, the first clamping part and the second clamping part are controlled to apply pulling force in opposite directions to test the connection strength of the lug, comprising: Based on the fact that the pull testing machine is in the second clamping state, the first clamping part and the second clamping part are controlled to apply pulling force in opposite directions to test the connection strength of the lug, comprising: Based on the fact that the first pulling force pressure maintaining duration reaches the first preset duration, the first clamping part and the second clamping part are controlled to cancel the first pulling force, and the pull testing machine is switched to a third clamping state; Based on the fact that the pull testing machine is in the third clamping state, the second clamping part is controlled to release the second connecting plate, and a first separation duration is accumulated; Based on the fact that the first separation duration reaches the second preset duration, the second clamping part is controlled to clamp the second connecting plate, and the pull testing machine is switched to a fourth clamping state; Based on the fact that the pull testing machine is in the fourth clamping state, the first clamping part and the second clamping part are controlled to apply second pulling force respectively to test the connection strength of the lug.

8. The lug strength test method of the shock absorber oil reservoir according to claim 7, wherein: The second pulling force is greater than the first pulling force.

9. The method of testing the strength of a tab of a shock absorber reservoir of claim 7, wherein The lug strength test method of the shock absorber oil reservoir further comprises: Based on the fact that one of the oil reservoir tests is completed, the oil reservoir in the test tooling is disassembled; Based on the next oil reservoir to be tested, the step of welding the second connecting plate on the lug of the oil reservoir is returned to be executed.

10. The lug strength test method of the shock absorber oil reservoir according to claim 9, wherein: The step of disassembling the oil reservoir in the test tooling based on the fact that one of the oil reservoir tests is completed, comprises: Based on the fact that one of the oil reservoir tests is completed, the oil reservoir in the test tooling is disassembled, and the test number of the test tooling is accumulated by 1; The first pulling force is positively correlated with the test number.

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