Spring tension testing device

Abstract

The utility model relates to a spring tension testing device. The spring tension testing device comprises a fixed part, a movable part, a driving device, a first adjustable limiting part and a second adjustable limiting part, the fixed part is connected with one end of a to-be-tested spring, and the movable part is connected with the other end of the to-be-tested spring; the driving device can drive the movable part to reciprocate in the preset stretching direction relative to the fixed part; the first adjustable limiting piece is arranged between the fixed piece and the movable piece; in an initial state, a to-be-measured spring is in an initial length, and the first adjustable limiting piece abuts against the movable piece to limit the distance between the movable piece and the fixed piece to be matched with the initial length of the to-be-measured spring; when the to-be-tested spring is in a tensile length testing state, the movable piece abuts against the second adjustable limiting piece; the driving device can drive the movable part to reciprocate between the first adjustable limiting part and the second adjustable limiting part; therefore, by adjusting the positions of the first adjustable limiting piece and the second adjustable limiting piece, the test of to-be-tested springs with different lengths can be adapted.

Description

Technical Field

[0001] This application relates to the technical field of spring tensile force detection, and particularly to a spring tensile force testing device. Background Art

[0002] As dishwashers are more and more widely used, the relevant life requirements for testing the door bodies of dishwashers need to be improved accordingly, and the opening and closing life of the door bodies of dishwashers is also within the scope of attention. In order to better test the opening and closing life of the dishwasher door, it is now necessary to design a tooling to test the life of the spring of the dishwasher door, which is convenient for testing the life of the spring; however, the existing spring testing tooling can only test single-variety springs and cannot test the springs on dishwashers of different models, and there is no tensile force detection function during the testing process.

[0003] Therefore, an improved spring tensile force testing device is needed to solve at least one of the above-mentioned problems of the prior art. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, this application provides a spring tensile force testing device, which includes a fixing member, a movable member and a driving device; the fixing member is connected to one end of the spring to be tested, and the movable member is connected to the other end of the spring to be tested; the driving device is in transmission connection with the movable member, and the driving device can drive the movable member to reciprocate relative to the fixing member along a preset stretching direction; it further includes a first adjustable limiting member and a second adjustable limiting member arranged along the preset stretching direction of the spring to be tested; the first adjustable limiting member is arranged between the fixing member and the movable member; in the initial state, the spring to be tested is in the initial length, and the first adjustable limiting member abuts against the movable member to limit the distance between the movable member and the fixing member to match the initial length of the spring to be tested; when the spring to be tested is in the test stretching length state, the movable member abuts against the second adjustable limiting member; the driving device can drive the movable member to reciprocate between the first adjustable limiting member and the second adjustable limiting member.

[0005] Further, the spring tensile force testing device further includes an installation table, and the fixing member is fixedly arranged on the installation table; the first adjustable limiting member and the second adjustable limiting member are detachably and fixedly arranged on the installation table.

[0006] Further, the spring tensile force testing device further includes a slide rail, the slide rail is fixedly arranged on the installation table, and the movable member is in sliding fit with the slide rail; the driving device can drive the movable member to reciprocate along the slide rail.

[0007] Further, a plurality of fixing positions are provided on the fixing member; a plurality of connecting positions are provided on the movable member, and the plurality of connecting positions are arranged in one-to-one correspondence with the plurality of fixing positions; one end of the spring to be tested is connected to the fixing position, and the other end of the spring to be tested is connected to the connecting position.

[0008] Further, an installation groove is provided on the fixing position, a connecting through hole is provided at the bottom of the installation groove, one end of the spring to be tested is placed in the installation groove and is threadedly connected to the connecting through hole by a bolt, so that the spring to be tested is fixedly connected to the fixing position.

[0009] Further, a connecting ring is provided on the connecting position, and one end of the spring to be tested is sleeved on the connecting ring.

[0010] Further, the driving device is fixedly arranged on the installation table; the pushing end of the driving device is fixedly connected to the movable member; a limit sensing device is provided on the driving device, and the movement stroke of the pushing end of the driving device is within the sensing area of the limit sensing device.

[0011] Further, the spring tensile force testing device further includes a control device, a tensile force detection device is provided on the connecting position, and the tensile force detection device is used to detect the tensile force value of the spring to be tested; the control device is electrically connected to the tensile force detection device, the limit sensing device and the driving device respectively.

[0012] Further, the spring tensile force testing device further includes a moving component, and the moving component is arranged at the bottom of the installation table.

[0013] Further, the spring tensile force testing device further includes a protective cover, the protective cover has an opening, and the protective cover is buckled on the upper surface of the installation table.

[0014] A spring tensile force testing device provided by the present application has at least the following technical effects:

[0015] The spring tensile force testing device in this application includes a fixing member, a movable member, a driving device, a first adjustable limiting member, and a second adjustable limiting member; the fixing member is connected to one end of the spring to be tested, and the movable member is connected to the other end of the spring to be tested; the driving device can drive the movable member to reciprocate relative to the fixing member along a preset stretching direction; the first adjustable limiting member is arranged between the fixing member and the movable member; in the initial state, the spring to be tested is in the initial length, and the first adjustable limiting member abuts against the movable member to limit the distance between the movable member and the fixing member to match the initial length of the spring to be tested; when the spring to be tested is in the test stretching length state, the movable member abuts against the second adjustable limiting member; the driving device can drive the movable member to reciprocate between the first adjustable limiting member and the second adjustable limiting member; furthermore, by adjusting the positions of the first adjustable limiting member and the second adjustable limiting member, the test of springs to be tested with different lengths can be adapted, so that the life test of springs of different models can be realized, and the structure is simple and the operation is safe. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 : Overall structural schematic diagram of the spring tensile force testing device provided by the embodiment of the present invention;

[0018] Figure 2 : Overall structural schematic diagram of another spring tensile force testing device provided by the embodiment of the present invention;

[0019] Figure 3 : Structural schematic diagram of the movable member provided by the embodiment of the present invention;

[0020] Figure 4 : Structural schematic diagram of the fixing member provided by the embodiment of the present invention;

[0021] In the figure: 1 - mounting table, 2 - fixing member, 3 - movable member, 4 - driving device, 5 - first adjustable limiting member, 6 - second adjustable limiting member, 7 - slide rail, 8 - limit sensing device, 9 - tensile force detection device, 10 - moving assembly, 11 - protective cover, 12 - PLC controller, 13 - display device, 14 - mounting bracket, 21 - fixing position, 31 - connecting position, 32 - chute, 211 - mounting groove, 212 - connecting through hole, 311 - connecting ring. Detailed Embodiments

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0024] The following describes the embodiments with reference to the accompanying drawings, which do not limit the contents of the utility model described in the claims.

[0025] Please refer to Figures 1-4 The embodiment of the present disclosure provides a spring tension test device, including a fixed part 2, a movable part 3 and a driving device 4; the fixed part 2 is connected to one end of the spring to be tested, and the movable part 3 is connected to the other end of the spring to be tested; the driving device 4 is transmission-connected to the movable part 3, and the driving device 4 can drive the movable part 3 to reciprocate relative to the fixed part 2 along a preset tensile direction; it also includes a first adjustable limiter 5 and a second adjustable limiter 6 arranged along the preset tensile direction of the spring to be tested; the first adjustable limiter 5 is arranged between the fixed part 2 and the movable part 3; in the initial state, the spring to be tested is at the initial length, the first adjustable limiter 5 abuts against the movable part 3, and limits the distance between the movable part 3 and the fixed part 2 to match the initial length of the spring to be tested; when the spring to be tested is in the test tensile length state, the movable part 3 abuts against the second adjustable limiter 6; the driving device 4 can drive the movable part 3 to reciprocate between the first adjustable limiter 5 and the second adjustable limiter 6.

[0026] Specifically, the first adjustable limit member 5 and the second adjustable limit member 6 are arranged along the preset stretching direction of the spring to be tested; the first adjustable limit member 5 is arranged between the fixed member 2 and the movable member 3, and the second adjustable limit member 6 is arranged behind the movable member 3. Moreover, the specific setting positions of the first adjustable limit member 5 and the second adjustable limit member 6 can be adjusted according to different models of the spring to be tested and different test requirements.

[0027] In the embodiment of the present application, by arranging the first adjustable limit member 5 and the second adjustable limit member 6 along the preset stretching direction, and the first adjustable limit member 5 is arranged between the fixed member 2 and the movable member 3. In the initial state, the spring to be tested is at its initial length, and the first adjustable limit member 5 abuts against the movable member 3, restricting the distance between the movable member 3 and the fixed member 2 to match the initial length of the spring to be tested; when the spring to be tested is in the test stretching length state, the movable member 3 abuts against the second adjustable limit member 6. Furthermore, by adjusting the positions of the first adjustable limit member 5 and the second adjustable limit member 6, the testing of springs to be tested with different lengths can be adapted, thereby enabling the life test of springs to be tested with different models. Moreover, the structure is simple, the operation is safe, and the test efficiency is high.

[0028] In some embodiments, the spring tensile force testing device further includes an installation table 1, and the fixed member 2 is fixedly arranged on the installation table 1; the first adjustable limit member 5 and the second adjustable limit member 6 are detachably and fixedly arranged on the installation table 1.

[0029] Specifically, threaded holes for connecting the fixed member 2 are provided on the upper surface of the installation table 1, and the fixed member 2 can be fixed on the installation table 1 through bolts.

[0030] Specifically, a plurality of first connection holes and a plurality of second connection holes are provided on the installation table 1. The first connection holes are used for connecting with the first adjustable limit member 5 through bolts; by connecting the first adjustable limit member 5 with the first connection holes at different positions, the installation position of the first adjustable limit member 5 between the fixed member 2 and the movable member 3 can be adjusted, thereby enabling the life test of springs to be tested with different models. The second connection holes are used for connecting with the second adjustable limit member 6 through bolts. By connecting the second adjustable limit member 6 with the second connection holes at different positions, the installation position of the second adjustable limit member 6 can be adjusted, thereby enabling the test to meet different stretching length requirements.

[0031] In the embodiment of the present application, the spring tensile force testing device can adapt to the testing of springs to be tested with different lengths by adjusting the positions of the first adjustable limit member 5 and the second adjustable limit member 6, thereby enabling the life test of springs to be tested with different models. Moreover, the structure is simple, the adjustment is convenient, and the different usage scenarios of the testing device are improved.

[0032] In some embodiments, the spring tensile test device further includes a slide rail 7 fixedly arranged on the mounting table 1, and the movable member 3 is slidably engaged with the slide rail 7; the driving device 4 can drive the movable member 3 to reciprocate along the slide rail 7.

[0033] Specifically, slide rail mounting holes are provided on the mounting table 1, and the slide rail 7 is fixed on the mounting table 1 by fixedly connecting bolts to the slide rail mounting holes.

[0034] Specifically, a chute 32 is provided on the movable member 3, and the slide rail 7 can be slidably fitted into the chute 32.

[0035] In the embodiments of the present application, through the sliding fit between the movable member 3 and the slide rail 7, the stability of the driving device 4 driving the movable member 3 to reciprocate along the slide rail 7 can be improved, thereby improving the accuracy of the test.

[0036] In other embodiments, in order to further improve the stability of the cooperation between the movable member 3 and the slide rail 7, at least two groups of slide rails 7 are provided on the mounting table 1, and a plurality of chutes 32 slidably engaged with the slide rails 7 are provided on the movable member 3.

[0037] In some embodiments, a plurality of fixing positions 21 are provided on the fixing member 2; a plurality of connecting positions 31 are provided on the movable member 3, and the plurality of connecting positions 31 are arranged in one-to-one correspondence with the plurality of fixing positions 21; one end of the spring to be tested is connected to the fixing position 21, and the other end of the spring to be tested is connected to the connecting position 31.

[0038] In the embodiments of the present application, by providing a plurality of fixing positions 21 on the fixing member 2; a plurality of connecting positions 31 arranged in one-to-one correspondence with the plurality of fixing positions 21 on the movable member 3, one end of the spring to be tested is connected to the fixing position 21, and the other end of the spring to be tested is connected to the connecting position 31, so that a plurality of springs to be tested of the same model can be tested simultaneously, improving the test efficiency.

[0039] In some embodiments, an installation groove 211 is provided on the fixing position 21, a connection through hole 212 is provided at the bottom of the installation groove 211, one end of the spring to be tested is placed in the installation groove 211 and is threadedly connected to the connection through hole 212 by a bolt, so that the spring to be tested is fixedly connected to the fixing position 21.

[0040] Specifically, as Figure 4 shown, one end of the spring to be tested can be received in the installation groove 211, and then a gasket is inserted into the installation groove 211, and the spring to be tested is fixedly connected to the fixing position 21 by threading a bolt through the connection through hole 212 and threadedly connecting it to the gasket.

[0041] In the embodiment of the present application, by providing an installation groove 211 on the fixed position 21 and a connection through-hole 212 at the bottom of the installation groove 211, one end of the spring to be tested can be fixedly connected to the fixed position 21 by passing a bolt through the connection through-hole 212, which improves the reliability of the connection between the two and facilitates the disassembly and assembly of the spring to be tested.

[0042] In some embodiments, a connection ring 311 is provided on the connection position 31, and one end of the spring to be tested is sleeved on the connection ring 311.

[0043] Specifically, one end of the spring to be tested can be a hook-shaped structure. By sleeving the hook-shaped structure with the connection ring 311, one end of the spring to be tested is connected to the movable member 3, and the disassembly is simple.

[0044] In some embodiments, the driving device 4 is fixedly arranged on the installation table 1; the pushing end of the driving device 4 is fixedly connected to the movable member 3; a limit sensing device 8 is arranged on the driving device 4, and the movement stroke of the pushing end of the driving device 4 is within the sensing area of the limit sensing device 8.

[0045] Specifically, the driving device 4 can be a driving cylinder, and the pushing end of the driving cylinder can be fixedly connected to the movable member 3 by bolts; the fixed end of the driving cylinder is fixedly arranged on the installation table 1.

[0046] Specifically, the limit sensing device 8 is used to sense the limit position information of the telescopic movement of the pushing end of the driving device 4.

[0047] In some embodiments, the spring tensile force testing device further includes a control device. A tensile force detection device 9 is arranged on the connection position 31, and the tensile force detection device 9 is used to detect the tensile force value of the spring to be tested; the control device is electrically connected to the tensile force detection device 9, the limit sensing device 8, and the driving device 4 respectively.

[0048] Specifically, the tensile force detection device 9 can detect the tensile force received by the spring to be tested in the state of the tested tensile length.

[0049] Specifically, the spring tensile force testing device further includes a display device 13. During the testing process, the display device 13 is used to show the tensile force change situation of each spring to be tested, and then the real-time state of the spring to be tested can be deduced according to the tensile force change situation; through the provided display device 13, the tensile force change situation of the spring to be tested can be observed more intuitively.

[0050] Specifically, the spring tensile force testing device further includes a PLC controller 12. Operation buttons are arranged on the PLC controller 12, such as start, end, and pause operation buttons. The tester can directly adjust the movement state of the driving device 4 through the operation buttons.

[0051] In the embodiments of the present application, the control device is electrically connected to the tensile force detection device 9, the limit sensing device 8, and the driving device 4 respectively. Further, the control device can respond to the limit position information sensed by the limit sensing device 8 for the telescopic movement of the pushing end of the driving device 4, control the pushing end of the driving device 4 to reciprocate, and then drive the movable member 3 to move between the first adjustable limit member 5 and the second adjustable limit member 6, so that the spring under test can reciprocally and cyclically expand and contract between the initial length and the test stretching distance to meet the requirement of the number of test times; the control device is also used to receive the tensile force information of the spring under test during the test process, and then determine whether the change in the tensile force of the spring under test meets the test requirements during the test process.

[0052] In some embodiments, the spring tensile force testing device further includes a moving assembly 10, and the moving assembly 10 is arranged at the bottom of the mounting table 1.

[0053] Specifically, the moving assembly 10 can be a universal wheel.

[0054] Specifically, the spring tensile force testing device further includes a mounting frame 14, the mounting table 1 is arranged on the mounting frame 14, four support legs are arranged at the bottom of the mounting frame 14, and universal wheels are mounted on each support leg, which is convenient for moving at any time according to the usage situation.

[0055] In some embodiments, the spring tensile force testing device further includes a protective cover 11, the protective cover 11 has an opening, and the protective cover 11 is buckled on the upper surface of the mounting table 1.

[0056] Specifically, the protective cover 11 can be a transparent panel protective cover. The transparent plates on the four circumferential surfaces of the protective cover are fixedly connected by using glue, and the transparent plate on the top surface of the protective cover can be fixedly connected to the transparent plates on the four surfaces by using movable latches. The top surface of the protective cover can be opened and closed. Locking the protective cover 11 during the test can prevent the situation that the spring under test breaks and causes injury to personnel.

[0057] Embodiment

[0058] Please refer to Figures 1-4, this embodiment discloses a spring tensile force testing device, including a fixing member 2, a movable member 3 and a driving device 4; the fixing member 2 is connected to one end of the spring to be tested, and the movable member 3 is connected to the other end of the spring to be tested; the driving device 4 is in transmission connection with the movable member 3, and the driving device 4 can drive the movable member 3 to reciprocate relative to the fixing member 2 along a preset stretching direction; it further includes a first adjustable limiting member 5 and a second adjustable limiting member 6 arranged along the preset stretching direction of the spring to be tested; the first adjustable limiting member 5 is arranged between the fixing member 2 and the movable member 3; in the initial state, the spring to be tested is in the initial length, the first adjustable limiting member 5 abuts against the movable member 3, and the distance between the movable member 3 and the fixing member 2 is restricted to match the initial length of the spring to be tested; when the spring to be tested is in the test stretching length state, the movable member 3 abuts against the second adjustable limiting member 6; the driving device 4 can drive the movable member 3 to reciprocate between the first adjustable limiting member 5 and the second adjustable limiting member 6.

[0059] A plurality of fixing positions 21 are arranged on the fixing member 2; a plurality of connection positions 31 corresponding to the plurality of fixing positions 21 one by one are arranged on the movable member 3, one end of the spring to be tested is connected to the fixing position 21, and the other end of the spring to be tested is connected to the connection position 31.

[0060] Tensile force detection devices 9 are arranged on the connection positions 31 of the movable member 3, and the tensile force detection devices 9 can detect the tensile force received by the spring to be tested in the test stretching length state; a limit sensing device 8 is arranged on the driving device 4, and the limit sensing device 8 is used to sense the limit position information of the telescopic movement of the pushing end of the driving device 4.

[0061] The spring tensile force testing device further includes a display device 13, and the display device 13 is used for the tensile force change situation of each spring to be tested, and then the real-time state of the spring to be tested can be deduced according to the tensile force change situation.

[0062] The spring tensile force testing device further includes a PLC controller 12, and operation buttons are arranged on the PLC controller 12, such as start, end and pause operation buttons, and an operator can input test requirements such as the number of tests, cycle time and stretching distance on the PLC controller 12.

[0063] Taking the spring to be tested with the model YA0.8×16.8×120 SUS304 as an example, the stretching distance is required to be 80 mm, the cycle time is one cycle every 5 s, and the number of tests is 50,000 times:

[0064] The initial length of the spring to be tested is 120 mm, and then the installation position of the first adjustable limiting member 5 is adjusted according to the initial length of the spring to be tested, so that in the initial state, the distance between the movable member 3 and the fixing member 2 is 120 mm, and one end of the movable member 3 abuts against the first adjustable limiting member 5, and then the installation position of the first adjustable limiting member 5 is determined.

[0065] Further, according to the stretching distance of 80 mm, the installation position of the second adjustable limiting member 6 is adjusted. When the driving device 4 drives the movable member 3 to move so that the stretching length of the spring to be tested reaches 80 mm, the other end of the movable member 3 abuts against the second adjustable limiting member 6, thereby determining the installation position of the second adjustable limiting member 6.

[0066] Furthermore, start the start button of the PLC controller 12. The control device can respond to the limit position information sensed by the limit sensing device 8 for the telescopic movement of the pushing end of the driving device 4, and control the pushing end of the driving device 4 to reciprocate within a stroke of 80 mm in terms of the telescopic amount, with the reciprocating frequency cycling once every 5S. The spring to be tested reciprocally cycles and stretches between the initial length and the test stretching distance, so as to meet the requirement of 50,000 test times.

[0067] During the test process, the tensile force received by the spring to be tested in the state of the test stretching length is detected in real time by the tensile force detection device 9, and the real-time change of the tensile force of the spring to be tested is output through the display device 13. Furthermore, the real-time state of the spring to be tested can be deduced according to the change of the tensile force.

[0068] Finally, it is determined whether the spring to be tested meets the test requirements according to whether the spring to be tested does not break and whether the change of the tensile force of the spring to be tested meets the allowable test error requirements.

[0069] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0070] It should be noted that all the features recorded in this application (including the technical features recorded in different embodiments) can be arbitrarily combined under reasonable circumstances, and the new technical solutions formed by the combination are within the protection scope of this application.

[0071] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spring tensile force testing device, characterized in that, It includes a fixed part (2), a movable part (3) and a driving device (4); The fixed part (2) is connected to one end of the spring to be tested, and the movable part (3) is connected to the other end of the spring to be tested; The driving device (4) is in transmission connection with the movable part (3), and the driving device (4) can drive the movable part (3) to reciprocate relative to the fixed part (2) along a preset stretching direction; It further includes a first adjustable limit member (5) and a second adjustable limit member (6) arranged along the preset stretching direction of the spring to be tested; The first adjustable limit member (5) is arranged between the fixed part (2) and the movable part (3); in the initial state, the spring to be tested is in the initial length, and the first adjustable limit member (5) abuts against the movable part (3) to limit the distance between the movable part (3) and the fixed part (2) to match the initial length of the spring to be tested; When the spring to be tested is in the test stretching length state, the movable part (3) abuts against the second adjustable limit member (6); The driving device (4) can drive the movable part (3) to reciprocate between the first adjustable limit member (5) and the second adjustable limit member (6).

2. The spring tensile force testing device according to claim 1, wherein It further includes a mounting table (1), and the fixed part (2) is fixedly arranged on the mounting table (1); The first adjustable limit member (5) and the second adjustable limit member (6) are detachably and fixedly arranged on the mounting table (1).

3. The spring tension testing device according to claim 2, wherein It further includes a slide rail (7), the slide rail (7) is fixedly arranged on the mounting table (1), and the movable part (3) is in sliding fit with the slide rail (7); The driving device (4) can drive the movable part (3) to reciprocate along the slide rail (7).

4. The spring tensile force testing device according to claim 2, characterized in that, A plurality of fixing positions (21) are arranged on the fixed part (2); a plurality of connecting positions (31) are arranged on the movable part (3), and the plurality of connecting positions (31) are arranged in one-to-one correspondence with the plurality of fixing positions (21); One end of the spring to be tested is connected to the fixing position (21), and the other end of the spring to be tested is connected to the connecting position (31).

5. The spring tensile force testing device according to claim 4, wherein An installation groove (211) is arranged on the fixing position (21), a connecting through hole (212) is arranged at the bottom of the installation groove (211), one end of the spring to be tested is placed in the installation groove (211) and is threadedly connected to the connecting through hole (212) by a bolt, so that the spring to be tested is fixedly connected to the fixing position (21).

6. The spring tensile force testing device according to claim 4, wherein A connecting ring (311) is arranged on the connecting position (31), and one end of the spring to be tested is sleeved on the connecting ring (311).

7. The spring tensile force testing device according to claim 4, wherein, The driving device (4) is fixedly arranged on the mounting table (1); The pushing end of the driving device (4) is fixedly connected to the movable part (3); A limit sensing device (8) is arranged on the driving device (4), and the movement stroke of the pushing end of the driving device (4) is within the sensing area of the limit sensing device (8).

8. The spring tension testing device according to claim 7, wherein, It further includes a control device. A tensile force detection device (9) is provided on the connection position (31), and the tensile force detection device (9) is used to detect the tensile force value of the spring to be measured; The control device is electrically connected to the tensile force detection device (9), the limit sensing device (8), and the driving device (4) respectively.

9. The spring tension testing device according to claim 2, characterized in that, It further includes a moving component (10), and the moving component (10) is arranged at the bottom of the mounting table (1).

10. The spring tensile force testing device according to claim 2, wherein, It further includes a protective cover (11). The protective cover (11) has an opening, and the protective cover (11) is buckled on the upper surface of the mounting table (1).

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