Durability test system

Abstract

A durability testing system relates to the technical field of power battery testing equipment and comprises a durability testing device and a testing machine. The durability testing device comprises a fixing seat, a connecting rod, a first clamp and a second clamp. The first clamp clamps the first shell plate part, and the second clamp clamps the second shell plate part; at least one end of the first clamp is connected with a connecting rod; the connecting rod is rotatably connected to the fixed seat; the connecting rod can drive the first clamp to shrink the clamp opening, so that the first clamp clamps and fixes the first shell plate part; the second clamp is located on the side, away from the fixing base, of the first clamp. The testing machine is configured to drive the second clamp to reciprocate in the second direction, so that the second shell plate part swings back and forth along with the second clamp. According to the durability test system provided by the utility model, the first shell plate part and the second shell plate part which are connected are used for replacing a shell for testing, the fixing mode is relatively simple and convenient, the structure of a tool clamp is simplified, the sample preparation time can be saved, the labor cost is reduced, and the test efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of power battery testing equipment technology, and more specifically, to a durability testing system. Background Technology

[0002] In the design of a power battery pack, the battery cells provide power to the entire vehicle. The cell's outer casing includes a housing and a top cover, which are typically welded together. During random vibration testing (a form of fatigue durability testing), the weakest point of the cell's outer casing is usually the weld between the top cover and the housing. If the weld breaks, it can easily lead to leakage and poor insulation. If leakage occurs, the entire battery pack may need to be replaced, resulting in high repair costs. Random vibration testing of the battery pack is conducted for design verification during the DV (Design Verification) and PV (Product Verification) stages. However, random vibration testing is expensive per test, and the number of battery pack samples used for each test is small, typically 1-3. If vibration fails, the battery pack needs to be reassembled, requiring a large amount of materials and increasing overall R&D costs and time.

[0003] To address the above issues, a test scheme has been developed that uses the cell casing to replace the entire battery pack to predict the risk of weld cracking. However, the cell casing in the test scheme involves an adhesive interface, and the adhesive process is relatively complex, resulting in low test efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a durability testing system that, to a certain extent, solves the technical problem of low testing efficiency caused by the need for adhesive bonding in random vibration testing of battery cell casings.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A durability testing system is used for fatigue durability testing of a test piece, the test piece including a first shell plate portion and a second shell plate portion connected to each other; the durability testing system includes a durability testing device and a testing machine;

[0007] The durability testing device includes a fixed base, a connecting rod, a first clamp, and a second clamp;

[0008] The first clamp is connected to the fixed base and configured to clamp the first shell plate portion, and the second clamp is configured to clamp the second shell plate portion; the durability testing device has intersecting first and second directions;

[0009] Along the first direction, at least one end of the first clamp is connected to the connecting rod; the connecting rod is rotatably connected to the fixed base; the connecting rod is configured to drive the first clamp to narrow its clamp opening so that the first clamp clamps and fixes the first shell plate portion.

[0010] Along the second direction, the second clamp is located on the side of the first clamp away from the fixed base; the second clamp is connected to the testing machine, which is configured to drive the second clamp to reciprocate along the second direction so that the second shell plate portion swings back and forth with the second clamp.

[0011] In any of the above technical solutions, optionally, the first clamp includes a first clamp and a second clamp, the first clamp and the second clamp are spaced apart along the first direction to form the clamping opening for clamping the first shell plate portion;

[0012] Both the first clamp and the second clamp are slidably connected to the fixed base; there are two connecting rods, one of which abuts against the first clamp and is configured to drive the first clamp to move toward the second clamp in the first direction, and the other connecting rod abuts against the second clamp and is configured to drive the second clamp to move toward the first clamp in the first direction, so that the first clamp and the second clamp narrow the clamp opening until they clamp and fix the first shell plate portion.

[0013] In any of the above technical solutions, optionally, the first clamp is provided with a groove for accommodating the end of the connecting rod; and / or, the second clamp is provided with a groove for accommodating the end of the connecting rod;

[0014] Along the first direction, the depth of the groove is configured to be greater than the thickness of the first shell plate portion.

[0015] In any of the above technical solutions, optionally, the first clamp includes a first clamp and a second clamp, the first clamp and the second clamp are spaced apart along the first direction to form the clamping opening for clamping the first shell plate portion;

[0016] The first clamp is slidably connected to the fixed base, and the second clamp is fixedly connected to the fixed base; the connecting rod abuts against the first clamp and is configured to drive the first clamp to move toward the second clamp in the first direction, so that the first clamp and the second clamp narrow the clamp opening until they clamp and fix the first shell plate portion.

[0017] In any of the above technical solutions, optionally, the second clamp includes a third clamp and a connector; the third clamp has a receiving cavity that extends along the first direction and is open at both ends;

[0018] The connector is inserted into the receiving cavity of the third clamp; and along the second direction, there is a gap between the connector and the third clamp for clamping the second shell plate portion;

[0019] The third clamp is connected to an adjusting member; the adjusting member passes through the third clamp and abuts against the plug-in member, and the adjusting member is configured to drive the plug-in member to move in order to change the gap between the plug-in member and the third clamp.

[0020] Optionally, in any of the above technical solutions, the third clamp has an opening on the side near the fixed base, and the opening communicates with the receiving cavity;

[0021] In the first direction, the cross-sectional area of ​​the opening is smaller than the cross-sectional area of ​​the receiving cavity.

[0022] Optionally, in any of the above technical solutions, the adjusting member is screwed to the third clamp.

[0023] Optionally, in any of the above technical solutions, the durability testing device further includes an action rod; the action rod is detachably connected to the second clamp, and the action rod is located on the side of the second clamp opposite to the fixed base;

[0024] The testing machine is connected to the actuating rod, and the testing machine is configured to drive the actuating rod to reciprocate along the second direction, so that the second clamp reciprocates with the actuating rod, and the second shell plate portion reciprocates with the second clamp.

[0025] Optionally, in any of the above technical solutions, the durability testing device further includes an end plate;

[0026] The end plate is mounted on the fixed base, and the connecting rod is rotatably connected to the end plate.

[0027] Optionally, in any of the above technical solutions, the fixing base is provided with fixing holes.

[0028] The main beneficial effects of this utility model are as follows:

[0029] The durability testing system provided by this utility model includes a durability testing device and a testing machine. A first clamp holds the first shell plate portion of the workpiece under test, and a second clamp holds the second shell plate portion of the workpiece under test. When the testing machine is driven, it can drive the second clamp to reciprocate, causing the second shell plate portion to oscillate back and forth with the second clamp, thus realizing a reciprocating fatigue test on the workpiece under test. The durability testing system described in this embodiment uses the connected first and second shell plate portions instead of the outer shell for testing. The fixing method is relatively simple, which simplifies the tooling fixture structure, saves sample preparation time, reduces labor costs, and improves testing efficiency.

[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an existing durability testing system;

[0033] Figure 2 for Figure 1 The diagram shows the structure of the durability testing device.

[0034] Figure 3 for Figure 2 A bottom view of the durability testing apparatus shown;

[0035] Figure 4 for Figure 2 Exploded view of the durability testing apparatus shown;

[0036] Figure 5 This is a schematic diagram of the durability testing system provided in an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of the durability testing device provided in this embodiment of the utility model;

[0038] Figure 7 for Figure 6 Exploded view of the durability testing apparatus shown;

[0039] Figure 8 for Figure 6 Front view of the durability testing apparatus shown;

[0040] Figure 9 for Figure 8 A cross-sectional view of the durability testing apparatus shown in section AA;

[0041] Figure 10 for Figure 9 A perspective view of the durability testing apparatus shown;

[0042] Figure 11 This is a schematic diagram of the structure of the third clamp provided in an embodiment of the present utility model.

[0043] Icons: 100-Durability testing device; 110-Fixed base; 111-Fixed hole; 120-Connecting rod; 130-End plate; 140-First clamp; 141-First clamping member; 142-Second clamping member; 143-Groove; 144-Clamping opening; 150-Second clamp; 151-Third clamping member; 152-Plug-in member; 153-Receiving cavity; 154-Adjusting member; 155-Opening; 160-Actuating rod; 200-Item to be tested; 210-First shell plate; 220-Second shell plate;

[0044] 300-Testing machine; 310-Actuator; 320-Frame; 321-Crossbeam; 322-Column; 323-Horizontal bar; 324-Base; 330-Hydraulic cylinder; 340-Oil pipe; 350-Water pipe;

[0045] 400-Shell testing device; 1-Fixed plate; 2-Screw; 3-End plate; 4-Modible plate; 5-Clamping plate; 6-Buffer layer; 7-Limiting steel plate; 8-Cell shell; 9-Adhesive block; 10-Pull rod; 11-Limiting hole; 12-Bolt hole; 13-Fastening hole; 14-Threaded hole;

[0046] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0051] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0054] Currently, random vibration testing is conducted using a testing machine. For example... Figure 1 and Figure 5As shown, the testing machine 300 includes an actuator 310, a frame 320, and a hydraulic cylinder 330. The frame 320 supports and connects to the hydraulic cylinder 330, which drives the actuator 310 to move up and down reciprocally. For example, the frame 320 includes a base 324, a crossbeam 321, a column 322, and a crossbar 323. The bottom of the column 322 is connected to the base 324, the top of the column 322 is connected to the crossbar 323, the crossbeam 321 is connected to the middle of the column 322, and the crossbeam 321 supports and connects to the hydraulic cylinder 330. The base 324, crossbeam 321, column 322, and crossbar 323 form a mechanical frame. The oil supply system is supplied to the hydraulic cylinder 330 through an oil pipe 340, thereby providing the actuator 310 with up and down reciprocating power. At the same time, the cooling system provides circulating water through a water pipe 350 to cool the oil supply system. The testing device is fixed on the base 324, such as the durability testing device 100 described in this embodiment, and the shell testing device 400 in the prior art described below. The actuator 310 drives the sample of the durability testing device 100 / shell testing device 400 to move up and down, thereby realizing the reciprocating fatigue of the sample.

[0055] A test scheme has been developed that uses the cell casing instead of the entire battery pack to predict the risk of weld cracking; for example... Figures 1-4 As shown, the specific working process of the housing testing device 400 is as follows:

[0056] First, the adhesive block 9 is attached to one side of the battery cell housing 8. Then, the bottom surface of the battery cell housing 8 is attached to the limiting steel plate 7 by adhesive. The limiting steel plate 7 has fastening holes 13. Fasteners are used to fasten the limiting steel plate 7 to the fixing plate 1.

[0057] The screw 2 rotates to push the movable plate 4 towards the battery cell casing 8, causing the movable plate 4 to press against the clamping plates 5 on both sides of the battery cell casing 8, thereby clamping the battery cell casing 8 and preventing it from moving. A buffer layer 6 (which can be made of high-molecular materials such as silicone, nylon, or polyurethane, and needs to generate significant friction) is placed between the clamping plates 5 and the battery cell casing 8; the buffer layer 6 prevents damage to the battery cell casing 8 and also prevents it from sliding. The clamping plates 5 are provided with bolt holes 12, which can be fastened to the fixed plate 1 using fasteners, thus completely limiting the battery cell casing 8 and preventing movement during tensile and compressive fatigue in the Z, Y, and X directions.

[0058] The fixed plate 1 is fixed to the base 324 of the testing machine 300 through the limiting hole 11. The end plate 3 is installed on the fixed plate 1. The end plate 3 can be assembled with the fixed plate 1 by welding, bolting, or integral molding. Threaded holes 14 are respectively provided on three adjacent surfaces of the adhesive block 9. After the adhesive block 9 and one end of the pull rod 10 are screwed and locked through the corresponding threaded holes 14, the other end of the pull rod 10 is clamped by the actuator 310 of the testing machine 300 to realize the reciprocating fatigue test of the battery cell shell 8 in one direction. By changing the placement direction of the battery cell shell 8 between the two clamping plates 5 and screwing the pull rod 10 into the corresponding threaded holes 14 on the adhesive block 9, reciprocating fatigue tests in the Z, Y, and X directions can be realized.

[0059] However, the above test scheme involves an adhesive interface for the battery cell casing 8, and the adhesive process is relatively complex, resulting in low test efficiency. This embodiment provides a durability testing system that simplifies the sample preparation process and improves efficiency.

[0060] This embodiment provides a durability testing system that can be used for random vibration testing; for example, for random vibration testing of battery packs.

[0061] See Figures 5-11 As shown, the durability testing system provided in this embodiment is used for fatigue durability testing of the test piece 200, which includes a first shell plate portion 210 and a second shell plate portion 220 connected to each other.

[0062] The durability testing system includes a durability testing device 100 and a testing machine 300. The durability testing device 100 includes a fixed base 110, a connecting rod 120, a first clamp 140, and a second clamp 150. The first clamp 140 is connected to the fixed base 110 and configured to clamp a first shell plate portion 210, and the second clamp 150 is configured to clamp a second shell plate portion 220. The durability testing device 100 has intersecting first direction X and second direction Y; optionally, the first direction X and second direction Y are perpendicular to each other. Optionally, the durability testing device 100 also has a third direction Z perpendicular to the first direction X and the second direction Y.

[0063] Along the first direction X, at least one end of the first clamp 140 is connected to a connecting rod 120; the connecting rod 120 is rotatably connected to the fixed base 110; the connecting rod 120 is configured to drive the first clamp 140 to narrow the clamp opening 144, so that the first clamp 140 clamps and fixes the first shell plate portion 210; along the second direction Y, the second clamp 150 is located on the side of the first clamp 140 away from the fixed base 110; the second clamp 150 is connected to the testing machine 300, and the testing machine 300 is configured to drive the second clamp 150 to reciprocate along the second direction Y, so that the second shell plate portion 220 swings back and forth with the second clamp 150. In some embodiments, at least one end of the first clamp 140 is connected to a connecting rod 120. This means that the first clamp 140 can be connected to one end of the connecting rod 120 so that the first clamp 140 can be driven to reduce the clamp opening 144 under the action of the connecting rod 120. Alternatively, the first clamp 140 can be connected to both ends of the first clamp 140 so that the first clamp 140 can be driven to reduce the clamp opening 144 under the action of the connecting rod 120.

[0064] The durability testing system described in this embodiment includes a durability testing device 100 and a testing machine 300. A first clamp 140 clamps the first shell plate portion 210 of the workpiece 200 to be tested, and a second clamp 150 clamps the second shell plate portion 220 of the workpiece 200 to be tested. When the testing machine 300 is driven, it can drive the second clamp 150 to reciprocate, thereby causing the second shell plate portion 220 to swing back and forth with the second clamp 150, thus realizing the reciprocating fatigue test of the workpiece 200. The durability testing system described in this embodiment uses the connected first shell plate portion 210 and second shell plate portion 220 instead of the shell for testing. The fixing method is relatively simple, which simplifies the tooling fixture structure, saves sample preparation time, reduces labor costs, and improves testing efficiency.

[0065] See Figures 5-8 As shown, in an optional embodiment, the first clamp 140 includes a first clamp 141 and a second clamp 142. The first clamp 141 and the second clamp 142 are spaced apart along the first direction X to form a clamping opening 144 for clamping the first shell plate portion 210.

[0066] Optionally, when both ends of the first clamp 140 are connected to connecting rods 120, the first clamp 141 and the second clamp 142 can be slidably connected to the fixed base 110; there are two connecting rods 120, one of which abuts against the first clamp 141 and is configured to drive the first clamp 141 to move toward the second clamp 142 in a first direction, and the other connecting rod 120 abuts against the second clamp 142 and is configured to drive the second clamp 142 to move toward the first clamp 141 in a first direction, so that the first clamp 141 and the second clamp 142 narrow the clamp opening 144 until they clamp and fix the first shell plate portion 210. Both the first clamp 141 and the second clamp 142 are slidably connected to the fixed base 110, and both the first clamp 141 and the second clamp 142 are connected to a connecting rod 120, so that they can be adjusted and reduced from both directions of the clamp opening 144, thereby facilitating the adjustment of the position of the first shell plate portion 210 on the fixed base 110, and thus facilitating the connection of the testing machine 300 to the second shell plate portion 220 of the workpiece to be tested 200. Optionally, the first clamp 141 is provided with a groove 143 for accommodating the end of the connecting rod 120. The groove 143 facilitates the positioning of the connecting rod 120 on the first clamp 141, which helps to improve the stability of the connecting rod 120 driving the first clamp 141 to move, and thus helps to improve the stability of the durability testing device 100. Optionally, the second clamp 142 is provided with a groove 143 for accommodating the end of the connecting rod 120. The groove 143 facilitates positioning of the connecting rod 120 on the second clamp 142, improving the stability of the movement of the second clamp 142 driven by the connecting rod 120, and thus improving the stability of the durability testing device 100. Optionally, along the first direction, the depth of the groove 143 is configured to be greater than the thickness of the first shell plate portion 210. Since the thickness of the first shell plate portion 210 is less than the depth of the groove 143, when the first clamp 141 and the second clamp 142 just contact the first shell plate portion 210, and the first clamp 141 or the second clamp 142 clamps and secures the first shell plate portion 210 under the drive of the connecting rod 120, it can be ensured that the end of the connecting rod 120 is always located within the groove 143, thus improving the stability and accuracy of the movement of the first clamp 141 or the second clamp 142.

[0067] Optionally, when one end of the first clamp 140 is connected to the connecting rod 120, the first clamp 141 is slidably connected to the fixed base 110, and the second clamp 142 is fixedly connected to the fixed base 110. The connecting rod 120 abuts against the first clamp 141 and is configured to drive the first clamp 141 to move toward the second clamp 142 in a first direction, so that the clamp opening 144 of the first clamp 141 and the second clamp 142 narrows until the first shell plate portion 210 is clamped and fixed. By having the first clamp 141 slidably connected to the fixed base 110 and the second clamp 142 fixedly connected to the fixed base 110, and the first clamp 141 moving and narrowing the clamp opening 144 under the drive of the connecting rod 120 until the first shell plate portion 210 is clamped and fixed, the structure of the first clamp 140 can be simplified. Optionally, the first clamp 141 is provided with a groove 143 for receiving the end of the connecting rod 120. The groove 143 facilitates the positioning of the connecting rod 120 on the first clamp 141, which helps improve the stability of the connecting rod 120 driving the first clamp 141 to move, thereby helping to improve the stability of the durability testing device 100. Optionally, along the first direction, the depth of the groove 143 is configured to be greater than the thickness of the first shell plate portion 210.

[0068] See Figures 7-11 As shown, in an optional embodiment, the second clamp 150 includes a third clamp 151 and a connector 152. The third clamp 151 has a receiving cavity 153, which extends along a first direction X and is open at both ends. The connector 152 is inserted into the receiving cavity 153 of the third clamp 151. A gap exists between the connector 152 and the third clamp 151 along a second direction Y, where the second shell plate portion 220 is clamped. The third clamp 151 is connected to an adjusting member 154. The adjusting member 154 passes through the third clamp 151 and abuts against the connector 152. The adjusting member 154 is configured to drive the connector 152 to move, thereby changing the gap between the connector 152 and the third clamp 151. That is, the second shell plate portion 220 is clamped between the connector 152 and the third clamp 151. By driving the adjusting member 154, the connector 152 is moved, thereby securing the second shell plate portion 220.

[0069] Optionally, the adjusting member 154 is screwed to the third clamp 151, or the adjusting member 154 and the third clamp 151 are connected by other means. Optionally, the adjusting member 154 is a screw or other structural component.

[0070] In an optional embodiment, the third clamp 151 has an opening 155 on the side near the fixed base 110, and the opening 155 communicates with the receiving cavity 153; in the first direction X, the cross-sectional area of ​​the opening 155 is smaller than the cross-sectional area of ​​the receiving cavity 153. The opening 155 reduces the weight of the third clamp 151.

[0071] See Figures 5-8 As shown, in an optional embodiment, the durability testing device 100 further includes an actuating rod 160; the actuating rod 160 is detachably connected to the second clamp 150, and the actuating rod 160 is located on the side of the second clamp 150 facing away from the fixed base 110; the testing machine 300 is connected to the actuating rod 160, and the testing machine 300 is configured to drive the actuating rod 160 to reciprocate along the second direction Y, so that the second clamp 150 reciprocates with the actuating rod 160, and the second shell plate portion 220 reciprocates with the second clamp 150. The actuating rod 160 facilitates the connection between the second clamp 150 and the testing machine 300, thereby facilitating the connection between the durability testing device 100 and the testing machine 300.

[0072] Optionally, the actuating rod 160 is threadedly connected to the second clamp 150.

[0073] Optionally, the actuating rod 160 is connected to the actuator 310 of the testing machine 300.

[0074] See Figures 6-8 As shown, in an optional embodiment, the durability testing device 100 further includes an end plate 130; the end plate 130 is mounted on the fixed base 110, and the connecting rod 120 is rotatably connected to the end plate 130. The end plate 130 supports the connecting rod 120, so that the connecting rod 120 can be connected to the fixed base 110.

[0075] See Figure 6 As shown, in an optional embodiment, the mounting base 110 is provided with a mounting hole 111. The mounting hole 111 facilitates fixing the mounting base 110 to the base 324 of the testing machine 300, thereby facilitating the fixing of the durability testing device 100 to the base 324 of the testing machine 300.

[0076] To better understand the durability testing system described in this embodiment, the working process of the durability testing device 100 is briefly described below:

[0077] The first clamp 140 is rotated by the connecting rod 120 to clamp the first shell plate portion 210 of the workpiece 200 to be tested, and the second shell plate portion 220 is fastened to the second clamp 150. The actuating rod 160 connected to the second clamp 150 is connected to the actuator 310 of the testing machine 300, and the reciprocating fatigue test is performed with the aid of the testing machine 300.

[0078] Compared with the existing shell testing device 400, the durability testing device 100 can effectively simplify the tooling fixtures. Structurally, it can eliminate structural components such as clamping plate 5, buffer layer 6, and limiting steel plate 7, as well as the glue application process, which can save sample preparation time (for example, 10 hours) and reduce labor costs.

[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A durability testing system for fatigue durability testing of a test piece (200), said test piece (200) comprising a first shell plate portion (210) and a second shell plate portion (220) connected to each other, characterized in that, The durability testing system includes a durability testing device (100) and a testing machine (300); The durability testing device (100) includes a fixed base (110), a connecting rod (120), a first clamp (140), and a second clamp (150); The first clamp (140) is connected to the fixed base (110) and configured to clamp the first shell plate portion (210), and the second clamp (150) is configured to clamp the second shell plate portion (220); the durability testing device (100) has intersecting first direction (X) and second direction (Y); Along the first direction (X), at least one end of the first clamp (140) is connected to the connecting rod (120); the connecting rod (120) is rotatably connected to the fixed base (110); the connecting rod (120) is configured to drive the first clamp (140) to narrow the clamp opening (144) so ​​that the first clamp (140) clamps and fixes the first shell plate portion (210); Along the second direction (Y), the second clamp (150) is located on the side of the first clamp (140) away from the fixed base (110); the second clamp (150) is connected to the testing machine (300), which is configured to drive the second clamp (150) to reciprocate along the second direction (Y) so that the second shell plate portion (220) swings back and forth with the second clamp (150).

2. The durability testing system according to claim 1, characterized in that, The first clamp (140) includes a first clamp (141) and a second clamp (142), the first clamp (141) and the second clamp (142) being spaced apart along the first direction (X) to form the clamp opening (144) for clamping the first shell plate portion (210); Both the first clamp (141) and the second clamp (142) are slidably connected to the fixed base (110); there are two connecting rods (120), one of which abuts against the first clamp (141) and is configured to drive the first clamp (141) to move toward the second clamp (142) in the first direction, and the other connecting rod (120) abuts against the second clamp (142) and is configured to drive the second clamp (142) to move toward the first clamp (141) in the first direction, so that the first clamp (141) and the second clamp (142) narrow the clamp opening (144) until they clamp and fix the first shell plate portion (210).

3. The durability testing system according to claim 2, characterized in that, The first clamp (141) is provided with a groove (143) for receiving the end of the connecting rod (120); and / or, the second clamp (142) is provided with a groove (143) for receiving the end of the connecting rod (120); Along the first direction, the depth of the groove (143) is configured to be greater than the thickness of the first shell plate portion (210).

4. The durability testing system according to claim 1, characterized in that, The first clamp (140) includes a first clamp (141) and a second clamp (142), the first clamp (141) and the second clamp (142) being spaced apart along the first direction (X) to form the clamp opening (144) for clamping the first shell plate portion (210); The first clamp (141) is slidably connected to the fixed base (110), and the second clamp (142) is fixedly connected to the fixed base (110); the connecting rod (120) abuts against the first clamp (141) and is configured to drive the first clamp (141) to move toward the second clamp (142) in the first direction, so that the first clamp (141) and the second clamp (142) narrow the clamp opening (144) until they clamp and fix the first shell plate portion (210).

5. The durability testing system according to claim 1, characterized in that, The second clamp (150) includes a third clamp (151) and a connector (152); the third clamp (151) has a receiving cavity (153) that extends along the first direction (X) and is open at both ends; The connector (152) is inserted into the receiving cavity (153) of the third clamp (151); and along the second direction (Y), there is a gap between the connector (152) and the third clamp (151) for clamping the second shell plate portion (220); The third clamp (151) is connected to an adjusting member (154); the adjusting member (154) passes through the third clamp (151) and abuts against the plug (152), the adjusting member (154) being configured to drive the plug (152) to move to change the gap between the plug (152) and the third clamp (151).

6. The durability testing system according to claim 5, characterized in that, The third clamp (151) has an opening (155) on the side near the fixed base (110), and the opening (155) communicates with the receiving cavity (153). In the first direction (X), the cross-sectional area of ​​the opening (155) is smaller than the cross-sectional area of ​​the receiving cavity (153).

7. The durability testing system according to claim 5, characterized in that, The adjusting member (154) is screwed to the third clamp (151).

8. The durability testing system according to claim 1, characterized in that, The durability testing device (100) further includes an action rod (160); the action rod (160) is detachably connected to the second clamp (150), and the action rod (160) is located on the side of the second clamp (150) opposite to the fixed base (110); The testing machine (300) is connected to the actuating rod (160), and the testing machine (300) is configured to drive the actuating rod (160) to reciprocate along the second direction (Y) so that the second clamp (150) reciprocates with the actuating rod (160) and the second shell plate portion (220) reciprocates with the second clamp (150).

9. The durability testing system according to claim 1, characterized in that, The durability testing device (100) also includes an end plate (130); The end plate (130) is mounted on the fixed base (110), and the connecting rod (120) is rotatably connected to the end plate (130).

10. The durability testing system according to claim 1, characterized in that, The mounting base (110) is provided with mounting holes (111).

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