Spring service life testing machine

Abstract

The utility model discloses a spring service life testing machine, and relates to the technical field of spring testing. Wherein the spring service life test machine comprises a lifting assembly, a mounting seat and a mounting jig detachably arranged between the lifting assembly and the mounting seat, when the spring service life test is carried out, the matched mounting jig can be selected according to the specification and the type of a spring to be tested, and the corresponding mounting jig is mounted between the lifting assembly and the mounting seat; in this way, the spring needing to be tested is installed and fixed to the installation jig, and then the spring on the installation jig is subjected to a stretching or compression test through reciprocating movement of the lifting assembly. Therefore, for springs of different specifications and types, the service life of the springs can be tested only by replacing the matched mounting jig, so that the springs can be adapted to the springs of different specifications and types, the suitability of a spring service life testing machine is improved, and the utilization rate of the spring service life testing machine is effectively improved.

Description

Spring life testing machine Technical Field

[0001] This utility model relates to the field of spring testing technology, and in particular to a spring life testing machine. Background Technology

[0002] Life testing is a critical quality control step in the spring manufacturing process. Through life testing, the reliability and stability of springs during actual use can be ensured, avoiding safety issues caused by fatigue failure. The test results can help engineers optimize spring design and select appropriate materials, sizes, and structures to meet specific usage requirements. When testing springs, the spring to be tested needs to be mounted on a corresponding fixture before performing tensile or compression tests. Since the fixture and the spring life testing machine are usually not detachable, and the fixture determines the types of springs that the spring life testing machine can test, it can only test a single type of spring, which to some extent limits the use of the spring life testing machine. Summary of the Invention

[0003] The main purpose of this invention is to propose a spring life testing machine, which aims to improve the problem that current spring life testing equipment is limited in use because it cannot be matched with springs of different specifications and types.

[0004] To achieve the above objectives, this utility model proposes a spring life testing machine, which has intersecting X and Z directions, and includes:

[0005] Machine body;

[0006] A lifting assembly is reciprocatingly mounted on the machine body along the Z-axis; a testing space is formed between the lifting assembly and the machine body along the Z-axis; and

[0007] A mounting fixture is detachably installed in the test space. The mounting fixture is used to install the spring. The lifting assembly reciprocates along the Z-axis. The spring is subjected to tensile or compression tests through the mounting fixture.

[0008] In one embodiment, the spring life testing machine further includes a mounting base, which is spaced below the lifting assembly in the Z direction, and the gap between the lifting assembly and the mounting base forms the testing space.

[0009] The mounting fixture includes:

[0010] The first mounting part is detachably connected to the side of the lifting assembly facing the mounting base; and

[0011] The second mounting part is detachably connected to the mounting base. The first mounting part and the second mounting part are used to restrict the spring in the test space so as to perform a tensile or compression test on the spring.

[0012] In one embodiment, the first mounting portion has a limiting hole extending along the Z direction on the side facing the second mounting portion, and the limiting hole penetrates the side of the first mounting portion facing the second mounting portion;

[0013] The second mounting part is provided with a guide post extending along the Z direction on the side facing the first mounting part, and the guide post is positioned opposite to the limiting hole; the outer diameter of the guide post does not exceed the inner diameter of the limiting hole, and the spring is sleeved on the outer periphery of the guide post, so that one end of the spring abuts against the first mounting part and the other end abuts against the second mounting part, for performing a compression test on the spring.

[0014] In one embodiment, the first mounting portion is provided with a first ear hook on the side facing the second mounting portion, and the second mounting portion is provided with a second ear hook corresponding to the first ear hook on the side facing the first mounting portion;

[0015] In the Z direction, one end of the spring is hooked by the first hook and the other end is hooked by the second hook, for performing a tensile test on the spring.

[0016] In one embodiment, the mounting base includes:

[0017] A first base, detachably connected to the machine body, has a mounting groove extending through it in the Z direction for accommodating the two mounting parts, and the mounting groove extends through one side of the first base along the X direction; and

[0018] The second base is detachably connected to the machine body, and the second base is located on one side of the mounting groove that passes through the first base along the X direction.

[0019] In the X direction, the second seat is movable relative to the first seat so that the second seat has an abutment position close to the first seat and a removal position away from the first seat; the second seat is in the abutment position for clamping and fixing the second mounting part in the mounting groove; the second seat is in the removal position for removing the second mounting part from the mounting groove.

[0020] In one embodiment, the first seat has a slide rod extending along the X direction on the side facing the second seat, and the second seat is slidably fitted onto the slide rod along the X direction;

[0021] In the Z direction, a clearance groove is provided through the second base body, and the clearance groove extends along the X direction. A screw is inserted in the clearance groove, and the screw fixes the second base body to the machine body.

[0022] In one embodiment, the lifting assembly includes:

[0023] A slider is slidably disposed on the machine body along the Z-axis, and the first mounting part is detachably connected to the slider; and

[0024] A drive assembly is provided on the machine body, and the drive assembly is used to drive the slider to reciprocate along the Z direction.

[0025] In one embodiment, the driving component includes:

[0026] An eccentric wheel is rotatably mounted on the machine body, and the axis of rotation of the eccentric wheel extends along the X-direction; and

[0027] In the Z direction, one end of the connecting rod is rotatably mounted to the eccentric wheel, and the other end is rotatably mounted to the slider.

[0028] An electric motor, located on the machine body, is used to drive the eccentric wheel to rotate at a preset speed.

[0029] In one embodiment, the link includes:

[0030] The driving part is rotatably connected to the eccentric wheel; and

[0031] The driven part is rotatably connected to the slider;

[0032] The adjusting screw is located in the Z direction, with one end rotatably mounted to the driving part and the other end threadedly assembled to the driven part.

[0033] In one embodiment, the spring life testing machine further includes a cover, which is installed on the machine body and is used to at least partially cover the lifting assembly;

[0034] In the Z direction, the cover has an opening on the side facing the test space.

[0035] This utility model relates to a spring life testing machine, which includes a lifting assembly, a mounting base, and a detachable mounting fixture disposed between the lifting assembly and the mounting base. During spring life testing, a matching mounting fixture can be selected based on the type and specification of the spring to be tested. The mounting fixture is then installed between the lifting assembly and the mounting base, thus fixing the spring to be tested onto the mounting fixture. The reciprocating movement of the lifting assembly allows for tensile or compression testing of the spring on the mounting fixture. Therefore, for different types and specifications of springs, only the matching mounting fixture needs to be replaced for life testing, making it adaptable to different types and specifications of springs. This improves the adaptability of the spring life testing machine, effectively enhancing its versatility and flexibility, significantly increasing testing efficiency, and meeting the testing needs of springs of different specifications. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 is a schematic diagram of the overall structure of the spring life testing machine of this utility model;

[0038] Figure 2 is a schematic diagram of the overall structure of the spring life testing machine of this utility model from another perspective.

[0039] Figure 3 is an enlarged schematic diagram of the structure at point A in Figure 2 of the spring life testing machine of this utility model;

[0040] Figure 4 is a schematic diagram of the spring life testing machine of this utility model, showing the first and second seats separated as a whole.

[0041] Figure 5 is a schematic diagram of the second mounting part of the spring life testing machine of this utility model being removed from the mounting slot;

[0042] Figure 6 is a schematic diagram of the overall structure of the spring life testing machine of this utility model from another perspective.

[0043] Figure 7 is an enlarged schematic diagram of the structure at point B in Figure 6 of the spring life testing machine of this utility model;

[0044] Figure 8 is a schematic diagram of the lifting assembly of the spring life testing machine of this utility model;

[0045] Figure 9 is a schematic diagram of the connection structure of the motor and eccentric wheel of the spring life testing machine of this utility model.

[0046] Figure 10 is a schematic diagram of the cooperation relationship between the slider and the slide rail of the spring life testing machine of this utility model.

[0047] Figure 11 is a schematic diagram of the first mounting part and the second mounting part of another embodiment of the spring life testing machine of this utility model.

[0048] Explanation of icon numbers:

[0049] 100. Spring life testing machine;

[0050] 1. Machine body; 11. Control panel; 12. Slide rail;

[0051] 2. Lifting assembly; 21. Slider; 211. Guide part; 22. Drive assembly; 221. Eccentric wheel; 222. Connecting rod; 2221. Driving part; 2222. Driven part; 2223. Adjusting screw; 223. Motor;

[0052] 3. Mounting base; 31. First base body; 311. Mounting groove; 312. Slide rod; 32. Second base body; 321. Clearance groove;

[0053] 4. Mounting fixture; 41. First mounting part; 411. Limiting hole; 412. First ear hook; 42. Second mounting part; 421. Guide post; 422. Second ear hook; 423. Slide rod;

[0054] 5. Screw; 6. Cover; 61. Opening.

[0055] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0057] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0058] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0059] Life testing is a critical quality control step in the spring manufacturing process. Through life testing, the reliability and stability of springs during actual use can be ensured, avoiding safety issues caused by fatigue failure. The test results can help engineers optimize spring design and select appropriate materials, sizes, and structures to meet specific usage requirements. When testing springs, the spring to be tested needs to be mounted on a corresponding fixture before tensile or compression testing is performed. Since the fixture and the spring life testing machine are usually not detachable, it can only test a single specification and type of spring, which limits the use of the spring life testing machine to some extent.

[0060] Based on this, referring to Figures 1-11, this application embodiment provides a spring life testing machine 100. The spring life testing machine 100 has intersecting X, Y and Z directions, including a machine body 1, a lifting assembly 2, a testing space and a mounting fixture 4. The machine body 1 is used to provide a mounting carrier for the lifting assembly 2 and the mounting fixture 4. The lifting assembly 2 can reciprocate relative to the machine body 1 along the Z direction. In the Z direction, the space between the lifting assembly 2 and the machine body 1 forms a testing space. The mounting fixture 4 is detachably installed in the testing space and is used to install and limit the spring to be tested. Thus, by the reciprocating lifting and lowering movement of the lifting assembly 2 in the Z direction, the tension or compression of the spring can be tested by the mounting fixture 4.

[0061] In this embodiment, when conducting life tests on springs of different specifications and types, since the dimensions of springs of different specifications and types are different, it is necessary to adjust the mounting fixture 4 used for mounting and limiting them so that it can match the specifications and types of springs being tested. This allows the spring to be installed and confined within the test space between the lifting assembly 2 and the machine body 1. The lifting assembly 2 is then moved back and forth along the Z-direction to perform tensile or compressive life tests. It can be understood that the mounting fixture 4 is detachably connected to the test space, so that the matching mounting fixture 4 can be selected according to the specifications and types of springs to be tested, and the matching mounting fixture 4 can be installed in the test space for life testing of springs of different specifications and types. This effectively improves the versatility and flexibility of the spring life testing machine 100, significantly improves the testing efficiency, and meets the testing needs of springs of different specifications.

[0062] Referring to Figures 1, 3, and 4, in one embodiment of this application, the spring life testing machine 100 further includes a mounting base 3. In the Z direction, the mounting base 3 is spaced below the lifting assembly 2, and the gap between the mounting base 3 and the lifting assembly 2 forms the aforementioned testing space. The mounting fixture 4 is detachably disposed within the testing space. The mounting fixture 4 includes a first mounting part 41 and a second mounting part 42. The first mounting part 41 is detachably connected to the side of the lifting assembly 2 facing the mounting base 3, and the second mounting part 42 is detachably connected to the mounting base 3. The space between the first mounting part 41 and the second mounting part 42 forms a space for fixing and limiting the spring to be tested. It can be understood that one end of the spring is located at the position of the first mounting part 41 and the other end is located at the position of the second mounting part 42. With the lifting and lowering action of the lifting assembly 2 in the Z direction, the first mounting part 41 will be driven to move closer or further away from the second mounting part 42 in the Z direction, thereby realizing the tension or compression test of the spring fixed and limited between the first mounting part 41 and the second mounting part 42.

[0063] In this embodiment, when life tests are required for springs of different specifications and types, the matching first mounting part 41 and second mounting part 42 need to be replaced. Thus, the detachable connection between the first mounting part 41 and the lifting assembly 2 and the detachable connection between the second mounting part 42 and the mounting base 3 are used to better match the first mounting part 41 and the second mounting part 42, thereby enabling tests to be performed on springs of different specifications and types.

[0064] Referring to Figures 3, 4, and 7, in one embodiment of this application, the first mounting portion 41 has a limiting hole 411 extending in the Z direction on the side facing the second mounting portion 42, and the limiting hole 411 penetrates the side of the first mounting portion 41 facing the second mounting portion 42; the side of the second mounting portion 42 facing the first mounting portion 41 is provided with a guide post 421 extending in the Z direction, and the guide post 421 and the limiting hole 411 are matched and correspondingly arranged, and the outer diameter of the guide post 421 should not exceed the inner diameter of the limiting hole 411; when performing a compression test on the spring, the distance between the first mounting portion 41 and the second mounting portion 42 in the Z direction is first adjusted, that is, the lifting assembly is adjusted. 2. The Z-axis position relative to the machine body 1 is adjusted so that the distance between the first mounting part 41 and the second mounting part 42 is sufficiently large to allow the spring to be tested to be fitted from the upper end of the guide post 421 onto the outer periphery of the guide post 421, and the bottom of the spring to press against the upper end surface of the second mounting part 42. Then, the Z-axis position of the first mounting part 41 is adjusted and moved closer to the second mounting part 42 so that the upper end of the guide post 421 is inserted into the corresponding limiting hole 411. At this time, the upper end of the spring also presses against the lower end surface of the first mounting part 41. Thus, the compression test of the spring can be carried out.

[0065] In this embodiment, the outer diameter of the guide post 421 does not exceed the inner diameter of the limiting hole 411. This allows the guide post 421 to be inserted into the limiting hole 411 when the first mounting part 41 moves back and forth in the Z direction toward the second mounting part 42 and when the spring is compressed, thereby limiting the spring sleeved on the outer periphery of the guide post 421 (to prevent the spring from detaching from the first mounting part 41 and the second mounting part 42 when compressed). It can be understood that there can be multiple limiting holes 411, and the guide post 421 is matched and correspondingly set with the limiting holes 411. (When there are multiple limiting holes 411 and guide posts 421, attention should be paid to the distance between adjacent guide posts 421 and adjacent limiting holes 411. It is necessary to ensure that when the spring is installed between the first mounting part 41 and the second mounting part 42, the outer periphery of the adjacent springs will not come into contact, thus affecting the test effect.) This allows multiple springs to be compressed at once, thereby improving the test efficiency.

[0066] In this embodiment, it should be noted that when the lifting assembly 2 drives the first mounting part 41 to reciprocate in the Z direction, it should be ensured that when the first mounting part 41 moves to the furthest distance from the second mounting part 42 in the Z direction, the guide post 421 provided on the second mounting part 42 is at least partially inserted into the corresponding limiting hole 411. Thus, throughout the entire test process, the spring is constrained by the first mounting part 41, the second mounting part 42, and the guide post 421, ensuring that the spring maintains axial alignment during compression and preventing deviation. It is understood that the outer diameter of the guide post 421 should be smaller than the inner diameter of the spring to ensure that it can be freely inserted without excessive friction with the inner wall of the spring.

[0067] In this embodiment, after the compression test of the spring is completed, the lifting assembly 2 is controlled to move in the Z direction, so that the first mounting part 41 moves away from the second mounting part 42 to an appropriate distance. At this time, the guide post 421 completely retracts from the limiting hole 411, thereby removing the spring that has been tested. It can be understood that when performing compression tests on springs of different specifications and types, the springs will have different hole diameters. Therefore, the matching first mounting part 41 and second mounting part 42 can be selected, and the limiting hole 411 on the first mounting part 41 and the guide post 421 on the second mounting part 42 can be matched with the hole diameter of the spring to be tested, thereby meeting the compression test requirements for different springs.

[0068] Referring to FIG11, in one embodiment of this application, a first ear hook 412 is provided on the first mounting part 41 facing the second mounting part 42, and a second ear hook 422 corresponding to the first ear hook 412 is provided on the second mounting part 42 facing the first mounting part 41. With this arrangement, a tension test can be performed on a spring (such as a tension spring). During the test, the first ear hook 412 hooks one end of the spring and the second ear hook 422 hooks the other end of the spring. Thus, the lifting assembly 2 drives the first mounting part 41 to reciprocate towards or away from the second mounting part 42, thereby realizing the tension test process of the spring.

[0069] In this embodiment, the number of first ear hooks 412 and second ear hooks 422 can be set to multiple. When multiple first ear hooks 412 and second ear hooks 422 are provided, attention should be paid to the spacing between adjacent first ear hooks 412 and adjacent second ear hooks 422. It is necessary to ensure that when the spring is installed between the first mounting part 41 and the second mounting part 42, the outer periphery of the adjacent springs will not come into contact, thus affecting the test effect. In this way, tensile tests can be performed on multiple springs at once, thereby improving the test efficiency.

[0070] In this embodiment, after completing the tensile test of the spring, when it is necessary to remove the spring, the lifting assembly 2 is controlled to move the first mounting part 41 a suitable distance closer to the second mounting part 42. This keeps the spring in its natural state (not stretched), making it easier for the staff to remove the two ends of the spring from the first ear hook 412 and the second ear hook 422 respectively, and remove the spring. It can be understood that when performing tensile tests on springs of different specifications and types, the springs will have different hole diameters. Therefore, matching first mounting parts 41 and second mounting parts 42 can be selected, and the distance between adjacent first ear hooks 412 on the first mounting part 41 and adjacent second ear hooks 422 on the second mounting part 42 should meet the following condition: when the spring is installed between the first mounting part 41 and the second mounting part 42, the outer periphery of adjacent springs will not come into contact, thus affecting the test results. This allows for tensile testing of multiple springs at once, thereby improving testing efficiency.

[0071] Referring to Figures 3-5, in one embodiment of this application, the mounting base 3 includes a first base body 31 and a second base body 32. The first base body 31 is detachably connected to the machine body 1, as shown in Figure 4, and can be installed on the machine body 1 by bolt fastening. As shown in Figure 5, in the Z-direction, the first base body 31 has a through mounting groove 311 for accommodating the first mounting part 41, and the mounting groove 311 extends through one side of the first base body 31 in the X-direction, so that the side of the mounting groove 311 in the X-direction has an opening, thereby allowing the second mounting part 42 to enter the mounting groove 311 through the opening. The second base body 32 is located on the side of the mounting groove 311 with the opening, and the second base body 32 is movable in the X-direction, thereby giving the second base body 32 a contact position close to the first base body 31 and a removal position away from the first base body 31. When the second base body 32 is in the contact position, the side of the second base body 32 facing the first base body 31... The second mounting part 42 is pressed onto the second mounting part 42, thereby clamping and fixing the second mounting part 42 within the mounting groove 311 between the first seat 31 and the second seat 32. It is understood that when the second mounting part 42 enters the mounting groove 311, the side wall of the second mounting part 42 facing the second seat 32 should at least partially extend outward from the mounting groove 311. Thus, the second seat 32 can press against the outwardly extending side wall of the second mounting part 42, thereby achieving the effect of clamping and fixing the second mounting part 42 between the first seat 31 and the second seat 32. For example, in order to improve the clamping and fixing effect of the second mounting part 42, a rubber damping pad can be provided on the side of the second seat 32 facing the first seat 31 or on the side of the second mounting part 42 extending outward from the mounting groove 311 to increase the frictional resistance between the two. This ensures that the second mounting part 42 can be stably clamped and fixed on the mounting seat 3 when the spring is subjected to a tensile test.

[0072] In this embodiment, when testing is required for springs of different specifications and types, the matching first mounting part 41 and second mounting part 42 need to be replaced. This allows the second seat 32 to be moved along the X direction, driving it a certain distance away from the first seat 31 (so that the second seat 32 is in the removal position). This causes the side of the second seat 32 facing the second mounting part 42 to detach from the second mounting part 42, allowing the second mounting part 42 to be removed from the cylinder mounting groove 311 and the second mounting part 42 to be replaced. As shown in Figure 3, to facilitate the movement of the second seat 32 along the X direction by the operator, a handle (not shown in the figure) can be provided on the side of the second seat 32 away from the first seat 31, thereby facilitating the operator's hand operation.

[0073] For example, as shown in FIG7, the first mounting part 41 can be detachably mounted on the side of the lifting assembly 2 facing the mounting base 3, thereby realizing the detachable installation between the first mounting part 41 and the lifting assembly 2, so that when performing life tests for springs of different specifications and types, the matching first mounting part 41 and second mounting part 42 can be selected and installed in conjunction with the lifting assembly 2 and the mounting base 3.

[0074] Referring to Figures 3, 4, and 5, in one embodiment of this application, the first seat 31 has a sliding rod 312 extending along the X direction on the side facing the second seat 32. Multiple sliding rods 312 can be provided, and these multiple sliding rods 312 are spaced apart along the Y direction. It is understood that the sliding rods 312 should be staggered from the mounting groove 311 to avoid affecting the installation of the second mounting part 42. As shown in Figure 3, in the Z direction, the second seat 32 is provided with a clearance groove 321 extending along the X direction. A screw 5 passes through the clearance groove 321. The screw 5 has a threaded end and a large end. During installation, the threaded end of the screw 5 is passed through the clearance groove 321. The groove 321 is threaded into the threaded hole reserved on the machine body 1, so that the large end of the screw 5 abuts against the upper surface of the second seat 32, thereby fixing the second seat 32 to the machine body 1; when clamping and fixing the second mounting part 42, firstly, the large end of the screw 5 is disengaged from the upper surface of the second seat 32, and the second seat 32 is adjusted along the X direction so that the second seat 32 abuts against the side wall of the second mounting part 42, and then the screw 5 is tightened so that the large end of the screw 5 abuts against the upper surface of the second seat 32, thereby clamping and fixing the second mounting part 42.

[0075] In this embodiment, multiple clearance grooves 321 can be provided, and all clearance grooves 321 extend along the X direction. Each clearance groove 321 is fitted with at least one screw 5, which can improve the fixing effect on the second seat 32 and thus enhance the installation stability of the second mounting part 42. For example, the size of the second seat 32 in this embodiment can be made slightly larger, so that a small working platform can be formed on the upper surface of the second seat 32, so that the workers can perform some related auxiliary operations on its upper surface.

[0076] Referring to Figures 8, 9, and 10, in one embodiment of this application, the lifting assembly 2 includes a slider 21 and a driving assembly 22. The slider 21 is movably connected to the machine body 1 along the Z-direction. For example, as shown in Figure 10, a structure is provided in which the slider 21 is slidably mounted on the machine body 1. Two guide portions 211 extending along the Z-direction are provided at intervals on the side of the slider 21 facing the machine body 1. The two guide portions 211 are provided with sliding grooves extending along the Z-direction on the opposite side. A slide rail 12 is fixed on the side wall of the machine body 1, and the two sides of the slide rail 12 are slidably assembled with the corresponding sliding grooves, thereby achieving the effect of moving the slider 21 along the Z-direction and connecting it to the machine body 1. The driving assembly 22 is disposed inside the machine body 1 and is used to drive the slider 21 to reciprocate in the Z-direction.

[0077] Referring to Figures 8 and 9, in one embodiment of this application, the drive assembly 22 includes an eccentric wheel 221, a connecting rod 222, and a motor 223. The electrode is fixedly installed inside the machine body 1, and the eccentric wheel 221 is coaxially mounted on the shaft of the motor 223. The eccentric wheel 221 consists of a circular plate and a pin offset from the circular plate (this is prior art and will not be described in detail here). One end of the connecting rod 222 is rotatably connected to the pin on the eccentric wheel 221 in the Z direction, and the other end is rotatably connected to the slider 21 in the Z direction. Thus, when the motor 223 drives the eccentric wheel 221 to rotate, the slider 21, driven by the connecting rod 222, moves in a reciprocating linear up-and-down motion relative to the machine body 1 in the Z direction.

[0078] Referring to Figure 8, in one embodiment of this application, the connecting rod 222 includes a driving part 2221, a driven part 2222, and an adjusting screw 2223. The driving part 2221 is rotatably connected to a pin on the eccentric wheel 221, the driven part 2222 is rotatably connected to the upper end of the slider 21, and the adjusting screw 2223 is rotatably mounted to the driving part 2221 at one end and threadedly mounted to the driven part 2222 at the other end. This configuration allows adjustment of the distance between the driving part 2221 and the driven part 2222 by turning the adjusting screw 2223, thereby adjusting the length of the connecting rod 222. This allows for adjustments to the length of springs of different specifications. During life testing (when the spring length is different), the length of the connecting rod 222 is adjusted so that the distance between the first mounting part 41 and the second mounting part 42 meets the testing requirements for that type of spring. When it is necessary to remove the spring that has completed the test from the first mounting part 41 and the second mounting part 42, the length of the connecting rod 222 is shortened or lengthened by turning the adjusting screw 2223 (corresponding to the compression test condition and the tensile test condition of the spring, respectively). This causes the first mounting part 41 to move a certain distance away from (or closer to) the second mounting part 42, thereby removing the spring that has completed the test from between the first mounting part 41 and the second mounting part 42.

[0079] As can be understood, as shown in Figure 8, the rotation axis of the driven part 2222 extends along the X direction, so that when the adjusting screw 2223 is turned, the driven part 2222 will not rotate in the same direction as the applied turning force relative to the slider 21, thereby enabling the adjustment of the distance between the driven part 2222 and the driving part 2221.

[0080] Referring to Figures 1 and 2, in one embodiment of this application, the spring life testing machine 100 further includes a cover 6, which is installed on the machine body 1. As shown in Figure 1, the cover 6 is used to at least partially cover the lifting assembly 2. This configuration provides a certain level of safety protection, effectively preventing workers or external objects from touching the rapidly moving eccentric wheel 221, slider 21, connecting rod 222, and other structures, effectively preventing mechanical injury and ensuring safe testing. In the Z-direction, the cover 6 has an opening 61 on the side facing the testing space, which is used to arrange the spring to be tested in the testing space or remove it from the testing space. For example, to record the number of compressions or stretches of the tested spring for determining its lifespan, the cover 6 is used... Whether it meets the standard; a rotation counter (such as an electronic rotation counter, which uses a photoelectric sensor, magnetic sensor or rotary encoder to detect the rotation signal of the motor 223 shaft and counts it through electronic circuit; for example, a rotary incremental encoder outputs a pulse signal when rotating, and the counting device records the number of rotations of the shaft by detecting these pulses) can be set at a suitable position in the space inside the machine body 1 to record the number of rotations of the motor 223, thereby obtaining the number of compressions or stretches of the spring; or a counting induction probe (such as based on photoelectric principle, sound wave reflection, infrared induction lamp method) can be set at a suitable position in the space inside the cover 6 to record the number of reciprocating movements of the slider 21 in the Z direction, thereby obtaining the number of compressions or stretches of the spring.

[0081] In this embodiment, as shown in Figure 1, a control panel can be arranged at a suitable position on the outer side wall of the machine body 1. On the one hand, it is used to display the number of times the tested spring is stretched or compressed in real time, and on the other hand, it is used to send some instructions through the control panel 11. It is understood that the power-consuming components such as the motor 223, the rotation counter or the counting induction probe in this solution are all connected to an external power supply device to provide the required power.

[0082] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A spring life testing machine, wherein the spring life testing machine has intersecting X and Z directions, characterized in that, include: Machine body; A lifting assembly is reciprocatingly mounted on the machine body along the Z-axis; a test space is formed between the lifting assembly and the machine body along the Z-axis; and a mounting fixture is detachably mounted in the test space, the mounting fixture being used to mount a spring, the lifting assembly reciprocating along the Z-axis, and the spring being subjected to tensile or compression tests through the mounting fixture.

2. The spring life testing machine as described in claim 1, characterized in that, The spring life testing machine also includes a mounting base. In the Z direction, the mounting base is spaced below the lifting assembly, and the gap between the lifting assembly and the mounting base forms the test space. The mounting fixture includes: a first mounting part, detachably connected to the side of the lifting assembly facing the mounting base; and a second mounting part, detachably connected to the mounting base. The first mounting part and the second mounting part are used to confine the spring in the test space to perform tensile or compression tests on the spring.

3. The spring life testing machine as described in claim 2, characterized in that, The first mounting portion has a limiting hole extending along the Z direction on the side facing the second mounting portion, and the limiting hole penetrates the side of the first mounting portion facing the second mounting portion; the second mounting portion has a guide post extending along the Z direction on the side facing the first mounting portion, and the guide post is positioned opposite to the limiting hole; the outer diameter of the guide post does not exceed the inner diameter of the limiting hole, and the spring is sleeved on the outer periphery of the guide post, so that one end of the spring abuts against the first mounting portion and the other end abuts against the second mounting portion, for performing a compression test on the spring.

4. The spring life testing machine as described in claim 2, characterized in that, The first mounting part is provided with a first ear hook on the side facing the second mounting part, and the second mounting part is provided with a second ear hook corresponding to the first ear hook on the side facing the first mounting part; in the Z direction, one end of the spring is hooked by the first ear hook and the other end is hooked by the second ear hook, for performing a tensile test on the spring.

5. The spring life testing machine as described in any one of claims 2-4, characterized in that, The mounting base includes: a first base body detachably connected to the machine body, wherein in the Z direction, the first base body has a through mounting groove for accommodating the two mounting parts, and the mounting groove extends through one side of the first base body along the X direction; and a second base body detachably connected to the machine body, wherein the second base body is located on the side of the mounting groove extending through the first base body along the X direction; in the X direction, the second base body is movable relative to the first base body, such that the second base body has an abutment position close to the first base body and a removal position away from the first base body; the second base body is in the abutment position for clamping and fixing the second mounting part in the mounting groove; the second base body is in the removal position for removing the second mounting part from the mounting groove.

6. The spring life testing machine as described in claim 5, characterized in that, The first base has a slide rod extending along the X direction on the side facing the second base, and the second base is slidably mounted on the slide rod along the X direction; in the Z direction, the second base has a clearance groove extending along the X direction, and a screw is inserted in the clearance groove, and the screw fixes the second base to the machine body.

7. The spring life testing machine according to any one of claims 2-4, characterized in that, The lifting assembly includes: a slider, which is slidably disposed on the machine body along the Z-direction, and the first mounting part is detachably connected to the slider; and a drive assembly, which is disposed on the machine body and is used to drive the slider to reciprocate along the Z-direction.

8. The spring life testing machine as described in claim 7, characterized in that, The drive assembly includes: an eccentric wheel rotatably mounted on the machine body, with the rotation axis of the eccentric wheel extending along the X direction; and a connecting rod in the Z direction, one end of the connecting rod being rotatably mounted to the eccentric wheel and the other end being rotatably mounted to the slider; and a motor located on the machine body for driving the eccentric wheel to rotate at a preset speed.

9. The spring life testing machine as described in claim 8, characterized in that, The connecting rod includes: a driving part, rotatably connected to the eccentric wheel; a driven part, rotatably connected to the slider; and an adjusting screw, in the Z direction, one end of the adjusting screw is rotatably mounted to the driving part, and the other end is threadedly assembled to the driven part.

10. The spring life testing machine according to any one of claims 2-4, characterized in that, The spring life testing machine also includes a cover, which is installed on the machine body and is used to at least partially cover the lifting assembly; in the Z direction, the cover has an opening on the side facing the test space.

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