A spring tensile stiffness testing device

Abstract

This utility model relates to the field of spring testing technology and discloses a spring tensile stiffness testing device. The device includes a base plate with a mounting box fixedly installed on it. A testing component is mounted on the mounting box, and the testing component includes a sliding groove. The mounting box has the sliding groove. To make this spring tensile stiffness testing device suitable for testing various types of stiffness, such as cylindrical helical springs and tension springs, the testing component, in conjunction with a rotating handle, drives a central gear to mesh with a small gear, causing a screw to rotate within a nut. This pushes a sliding shell along a slide frame. The testing module stretches the spring via a hook, while simultaneously cooperating with a motor to drive a bidirectional threaded rod to rotate, causing two sets of sliding plates to slide in opposite directions along the sliding groove, stretching the spring body and collecting tensile force and deformation data in real time. Simultaneously, the cooperation between the sliding cylinder and the circular groove limits radial offset, ensuring that the stretching direction is consistent with the spring axis.

Description

Technical Field

[0001] This utility model relates to the field of spring testing technology, specifically a spring tensile stiffness testing device. Background Technology

[0002] In fields such as machinery manufacturing, automotive parts, and electronic instruments, the tensile stiffness of a spring is a core indicator for measuring its load-bearing capacity and elastic recovery performance.

[0003] A spring tensile stiffness testing device typically consists of a drive system, a clamping mechanism, sensing components, a data processing module, and a safety protection unit. Its working principle is as follows: the two ends of the spring are fixed to the clamping mechanism, the drive system stretches the spring at a constant speed according to a preset program, the sensing components simultaneously record the tensile force and deformation data, and the data processing module converts the data into stiffness parameters and compares them with standard thresholds to determine whether the spring is qualified. In terms of operation, the operator sets parameters such as the stretching stroke and speed according to the spring specifications, clamps the spring, and starts the test. The system automatically completes the stretching, data acquisition, analysis, and result determination. After the test, it automatically resets, and the report can be viewed or the data exported via a touchscreen.

[0004] However, the above-mentioned equipment has obvious shortcomings in use. Traditional tensile testing devices are mostly single-station designs, which can only test a single spring at a time. The entire process of clamping, testing, and unloading requires manual operation, which is extremely inefficient and cannot meet the needs of rapid quality inspection on the production line. In view of this, we propose a spring tensile stiffness testing device. Utility Model Content

[0005] The purpose of this invention is to provide a spring tensile stiffness testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A spring tensile stiffness testing device includes a base plate, on which a mounting box is fixedly mounted. A testing assembly is disposed on the mounting box, the testing assembly comprising:

[0008] The mounting box has a sliding groove, a motor is fixedly mounted on the mounting box, a bidirectional threaded rod is fixedly mounted on the output end of the motor, a sliding plate is threaded onto the bidirectional threaded rod, and a mounting bracket is fixedly mounted on the sliding plate.

[0009] A slide, one end of which is fixedly mounted on the mounting bracket, a limiting block is fixedly mounted on the other end of the slide, a sliding shell is slidably mounted on the slide, a test module is fixedly mounted on the sliding shell, and sliding cylinders are fixedly mounted on both sides of the test module;

[0010] A circular groove is provided inside the slide cylinder. A nut is fixedly installed on the slide cylinder. A screw is rotatably installed on the mounting bracket. A small gear is fixedly installed on the screw. A central gear is rotatably installed on the mounting bracket. A handle is fixedly installed on the central gear.

[0011] In a further embodiment, the bidirectional threaded rod and the slide plate are disposed inside the mounting box, and a hook is fixedly installed on the test end of the test module, with a test spring body snapped onto the hook.

[0012] In a further embodiment, the slide plate, mounting bracket, carriage, limiting block, sliding shell, test module, slide cylinder, circular groove, nut, screw, pinion, center gear, handle, and hook are provided in multiple sets.

[0013] In a further embodiment, the central gear meshes with multiple sets of pinions, the screw is threaded onto a nut, and the screw slides within a circular groove.

[0014] In a further embodiment, the slide plate is provided with an auxiliary component, the auxiliary component including a round block, the round block is fixedly installed on the bidirectional threaded rod, a hinge frame is fixedly installed inside the mounting box, a rubber block is fixedly installed on the slide plate, a limit hole is opened on the slide plate, and a limit rod is fixedly installed inside the mounting box.

[0015] In a further embodiment, multiple sets of the rubber block, limiting hole, and limiting rod are provided, and the circular block is rotatably mounted on the hinge frame.

[0016] In a further embodiment, the rubber block is disposed inside the mounting box, multiple sets of the limiting rods slide within the limiting holes, and corrugated strips are fixedly installed on multiple sets of the mounting brackets.

[0017] Compared with the prior art, this utility model provides a spring tensile stiffness testing device, which has the following beneficial effects:

[0018] 1. This spring tensile rigidity testing device is designed to be applicable to various types of rigidity testing, such as cylindrical helical springs and tension springs. It includes a testing component that, in conjunction with a rotating handle, drives a central gear to mesh with a small gear, causing a screw to screw into the nut and push the sliding shell along the slide. The testing module stretches the spring via a hook, while simultaneously, a motor drives a bidirectional threaded rod to rotate, causing two sets of sliding plates to slide in opposite directions along the slide groove, stretching the spring body. Real-time data on tensile force and deformation are collected. Furthermore, the fit between the slide cylinder and the circular groove limits radial offset, ensuring the stretching direction is consistent with the spring axis.

[0019] 2. In order to reduce the testing error caused by mechanical wear, the spring tensile rigidity testing device is equipped with an auxiliary component. This component works with the limiting rod to slide in the limiting hole, providing rigid guidance for the movement of the slide plate and avoiding the test module offset caused by uneven force on the bidirectional threaded rod. At the same time, when the slide plate slides to the limit position, the rubber block contacts the inner wall of the mounting box to absorb the impact energy and prevent rigid collision from damaging the threaded structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0022] Figure 3 This is a cross-sectional view of the mounting box structure of this utility model;

[0023] Figure 4 This is a cross-sectional view of part of the structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of this utility model;

[0025] Figure 6 This is a schematic diagram of part of the structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the test module structure of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Base plate; 2. Mounting box;

[0029] 3. Test components; 31. Slide rail; 32. Motor; 33. Bidirectional threaded rod; 34. Slide plate; 35. Mounting bracket; 36. Carriage; 37. Limiting block; 38. Sliding shell; 39. Test module; 310. Slide cylinder; 311. Circular groove; 312. Nut; 313. Screw; 314. Pinion; 315. Center gear; 316. Handle; 317. Hook;

[0030] 4. Auxiliary components; 41. Circular block; 42. Hinge frame; 43. Rubber block; 44. Limiting hole; 45. Limiting rod; 46. Corrugated strip; 5. Test spring body. Detailed Implementation

[0031] 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 protection scope of the present utility model.

[0032] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0033] Please see Figures 1-7 This utility model provides a technical solution:

[0034] A spring tensile stiffness testing device includes a base plate 1, on which a mounting box 2 is fixedly installed.

[0035] In one embodiment of this utility model, a test component 3 is provided on the mounting box 2. The test component 3 includes a slide groove 31. The mounting box 2 has a slide groove 31. A motor 32 is fixedly mounted on the mounting box 2. A bidirectional threaded rod 33 is fixedly mounted on the output end of the motor 32. A slide plate 34 is threaded onto the bidirectional threaded rod 33. A mounting bracket 35 is fixedly mounted on the slide plate 34. One end of a slide frame 36 is fixedly mounted on the mounting bracket 35. A limiting block 37 is fixedly mounted on the other end of the slide frame 36. A sliding shell 38 is slidably mounted on the slide frame 36. A test module 39 is fixedly mounted on the sliding shell 38. Slide cylinders 310 are fixedly mounted on both sides of the test module 39. A circular groove 311 is provided inside the slide cylinder 310. A nut 312 is fixedly mounted on the slide cylinder 310. A screw 313 is rotatably mounted on the mounting bracket 35. A small gear 314 is fixedly installed on the screw 313, a central gear 315 is rotatably installed on the mounting bracket 35, a handle 316 is fixedly installed on the central gear 315, a bidirectional threaded rod 33 and a slide plate 34 are set inside the mounting box 2, a hook 317 is fixedly installed on the test end of the test module 39, and a test spring body 5 is snapped onto the hook 317. The slide plate 34, mounting bracket 35, slide 36, limiting block 37, slide shell 38, test module 39, slide cylinder 310, circular groove 311, nut 312, screw 313, small gear 314, central gear 315, handle 316 and hook 317 are arranged in multiple sets, the central gear 315 meshes with multiple sets of small gears 314, the screw 313 is threadedly installed on the nut 312, and the screw 313 slides in the circular groove 311.

[0036] In this embodiment, the test spring body 5 is first snapped onto the hook 317 at the test end of the test module 39, completing the clamping work before testing. When a tensile test is required on the test spring body 5, the handle 316 is rotated, which drives the central gear 315 to rotate. Since the central gear 315 meshes with multiple sets of pinions 314, it drives the pinions 314 and the screw 313 fixedly connected to them to rotate. The screw 313 screws into the nut 312 on the slide cylinder 310, and at the same time, the screw 313 slides in the circular groove 311, pushing the slide shell 38 to slide along the slide frame 36, thereby driving the test module 39 to move, realizing the tensile test on the test spring body 5. The test spring body 5 is locked in place, and the motor 32 on the mounting box 2 is started at the same time. The output end of the motor 32 drives the bidirectional threaded rod 33 to rotate, so that the two sets of slide plates 34 threaded on the bidirectional threaded rod 33 slide in opposite directions along the slide groove 31 on the mounting box 2. The slide plates 34 drive the mounting frame 35 and related components to move, thereby stretching the test spring body 5. Data is collected by the test module 39. The limiting block 37 at the other end of the slide 36 can prevent the slide shell 38 from falling off the slide 36. The cooperation between the slide cylinder 310 and the circular groove 311 limits the radial offset, ensuring that the stretching direction is consistent with the axis of the test spring body 5. It is suitable for various types of rigidity testing such as cylindrical helical springs and tension springs.

[0037] In one embodiment of this utility model, an auxiliary component 4 is provided on the slide plate 34. The auxiliary component 4 includes a round block 41. The round block 41 is fixedly installed on the bidirectional threaded rod 33. A hinge frame 42 is fixedly installed inside the mounting box 2. A rubber block 43 is fixedly installed on the slide plate 34. A limit hole 44 is opened on the slide plate 34. A limit rod 45 is fixedly installed inside the mounting box 2. Multiple sets of rubber blocks 43, limit holes 44 and limit rods 45 are provided. The round block 41 is rotatably installed on the hinge frame 42. The rubber block 43 is located inside the mounting box 2. Multiple sets of limit rods 45 slide in the limit holes 44. Corrugated strips 46 are fixedly installed on multiple sets of mounting frames 35.

[0038] In this embodiment, during the sliding of the slide plate 34 along the slide groove 31, the limiting rod 45 inside the mounting box 2 slides within the limiting hole 44 on the slide plate 34, providing rigid guidance for the movement of the slide plate 34. This effectively avoids the offset of the test module 39 caused by uneven force on the bidirectional threaded rod 33, ensuring the accuracy of the test. When the slide plate 34 slides to its limit position, the rubber block 43 on the slide plate 34 contacts the inner wall of the mounting box 2. The rubber block 43 can absorb impact energy, preventing rigid collisions from damaging the threaded structure such as the bidirectional threaded rod 33, and reducing test errors caused by mechanical wear. The round block 41 on the bidirectional threaded rod 33 rotates on the hinge frame 42 inside the mounting box 2, providing stable support for the rotation of the bidirectional threaded rod 33. The corrugated strips 46 on the multiple sets of mounting frames 35 can enhance the structural strength of the mounting frame 35.

[0039] After the test is completed, turn off the motor 32, turn the handle 316 in the opposite direction to reset the test module 39, remove the test spring body 5 from the hook 317, and tidy up the equipment.

[0040] All electrical components mentioned in this application are electrically connected to the PLC controller and 220V AC mains power. The PLC controller is a conventional and known device capable of controlling the motor 32. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding, which are mature in the prior art. The machinery, parts and equipment are all conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. The supporting structures of the hydraulic drive structure mentioned in this application, such as hydraulic tanks and hydraulic pumps, are existing equipment and will not be described in detail here.

[0041] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A spring tensile stiffness testing device, comprising a base plate (1), wherein a mounting box (2) is fixedly mounted on the base plate (1), characterized in that: The mounting box (2) is provided with a test component (3), which includes: The mounting box (2) has a slide groove (31) and a motor (32) is fixedly mounted on the mounting box (2). A bidirectional threaded rod (33) is fixedly mounted on the output end of the motor (32). A sliding plate (34) is threaded onto the bidirectional threaded rod (33). A mounting bracket (35) is fixedly mounted on the sliding plate (34). A slide (36) is fixedly mounted on the mounting bracket (35), and a limiting block (37) is fixedly mounted on the other end of the slide (36). A sliding shell (38) is slidably mounted on the slide (36), and a test module (39) is fixedly mounted on the sliding shell (38). Sliding cylinders (310) are fixedly mounted on both sides of the test module (39). A circular groove (311) is provided inside the slide cylinder (310). A nut (312) is fixedly installed on the slide cylinder (310). A screw (313) is rotatably installed on the mounting bracket (35). A small gear (314) is fixedly installed on the screw (313). A central gear (315) is rotatably installed on the mounting bracket (35). A handle (316) is fixedly installed on the central gear (315).

2. The spring tensile stiffness testing device according to claim 1, characterized in that: The bidirectional threaded rod (33) and the slide plate (34) are located inside the mounting box (2). The test end of the test module (39) is fixedly installed with a hook (317), and a test spring body (5) is snapped onto the hook (317).

3. The spring tensile stiffness testing device according to claim 1, characterized in that: The slide plate (34), mounting bracket (35), slide frame (36), limiting block (37), slide shell (38), test module (39), slide cylinder (310), circular groove (311), nut (312), screw (313), pinion (314), center gear (315), handle (316) and hook (317) are provided in multiple sets.

4. The spring tensile stiffness testing device according to claim 1, characterized in that: The central gear (315) meshes with multiple sets of pinions (314), the screw (313) is threaded onto the nut (312), and the screw (313) slides in the circular groove (311).

5. The spring tensile stiffness testing device according to claim 1, characterized in that: An auxiliary component (4) is provided on the slide plate (34). The auxiliary component (4) includes a round block (41). The round block (41) is fixedly installed on the bidirectional threaded rod (33). A hinge frame (42) is fixedly installed inside the mounting box (2). A rubber block (43) is fixedly installed on the slide plate (34). A limit hole (44) is opened on the slide plate (34). A limit rod (45) is fixedly installed inside the mounting box (2).

6. The spring tensile stiffness testing device according to claim 5, characterized in that: The rubber block (43), the limiting hole (44) and the limiting rod (45) are provided in multiple sets, and the round block (41) is rotatably mounted on the hinge frame (42).

7. The spring tensile stiffness testing device according to claim 5, characterized in that: The rubber block (43) is disposed inside the mounting box (2), the multiple sets of limiting rods (45) slide within the limiting hole (44), and the multiple sets of mounting brackets (35) are fixedly mounted with corrugated strips (46).

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