Long tension spring service life testing device
By adopting a long-stroke cylinder and hook-limiting structure in the tension spring life test device, combined with the scale and marking block, the effective life test of the long-stroke spring is achieved, solving the problem that the existing devices cannot test the long-stroke spring, ensuring that Test accuracy and safety.
Patent Information
- Application Number
- CN202420081958.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-12
AI Technical Summary
The existing spring life test devices cannot effectively test the life of the long spring because the device structure cannot stretch the long spring to a sufficient length.
A life test device for a hook-limiting structure including a long-stroke cylinder, an upper fixed hook member and a lower fixed hook member was designed. The tension spring is effectively stretched through the long-stroke cylinder, and the tension hook of the tension spring is restricted by the hook-limiting structure to prevent the tension spring from being pulled out. It is separated, combining the scale and marking block to measure the tensile length.
The effective life test of long springs is realized, which solves the problem that existing devices cannot test long springs, and can test both ordinary and long springs, ensuring the accuracy and safety of the test.
Smart Images
Figure CN222336704U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tension spring testing devices, in particular to a life testing device for a long tension spring. Background Art
[0002] With the development of industry, various springs have been used more and more widely in various fields. In many occasions and structures, springs rely on the force generated by the deformation of the spring to play a role. To determine whether the spring can provide the required force under a certain deformation, it is necessary to measure the elastic coefficient of the spring. If there is a slight change in the deformation of the spring, it will have an adverse effect on the safety and practical performance of the entire structure.
[0003] Extension springs are also called tension springs, or extension springs for short. They are coil springs that bear axial tension. After the extension springs are produced, they must pass strict tests before use, because most extension springs are the main components used in mechanical vehicles, such as the extension springs on vehicles. If the extension springs installed on the vehicle have not undergone strict tests and are installed on the vehicle at will, and the performance does not meet the requirements, it is easy to cause very serious consequences. For example, if the extension springs used for shock absorption lose balance due to performance degradation, it is easy to cause traffic accidents. Therefore, the extension springs need to undergo a life test before use. The existing extension spring life test device is inconvenient for testing slender extension springs, because the long extension springs cannot be stretched to a sufficient length due to the limitations of the device structure, and thus the life test of the long extension springs cannot be achieved. For this reason, it is necessary to develop and design a device suitable for life testing of long extension springs. Utility Model Content
[0004] The utility model aims to design a life test device for a long tension spring, so as to realize the life test suitable for the long tension spring.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A life test device for a long tension spring comprises a box body, a long-stroke cylinder is provided on the top of the box body, the piston rod of the long-stroke cylinder is located inside the box body, the end of the piston rod is fixedly connected to a mounting plate, an upper fixed hook is provided on the mounting plate, a lower fixed hook is provided inside the box body below the upper fixed hook, and a hook limiting structure for limiting the pull hook of the long tension spring is respectively provided on the upper fixed hook and the lower fixed hook.
[0007] Furthermore, in the above-mentioned life testing device for the long tension spring, the hook limiting structure on the upper fixed hook member includes a fixed member and a rotating member, the fixed member is fixedly connected to the upper fixed hook member, the rotating member is rotatably connected to the fixed member, the fixed member is located below the rotating member, the fixed member and the rotating member are provided with hook grooves, and the fixed member and the rotating member are provided with external threads.
[0008] Furthermore, in the above-mentioned life testing device for the long tension spring, the hook limiting structure on the lower fixed hook member includes a fixed member and a rotating member, the fixed member is fixedly connected to the lower fixed hook member, the rotating member is rotatably connected to the fixed member, the fixed member is located above the rotating member, the fixed member and the rotating member are provided with hook grooves, and the fixed member and the rotating member are provided with external threads.
[0009] Furthermore, in the above-mentioned long tension spring life test device, two of the limiting hook structures are respectively provided on the upper fixed hook member and the lower fixed hook member.
[0010] Furthermore, in the above-mentioned long tension spring life test device, a guide rod is also provided in the box body, and the guide rod passes through the mounting plate and is slidably connected to the mounting plate.
[0011] Furthermore, in the above-mentioned long tension spring life test device, a scale is provided in the box, and a plurality of marking blocks are provided on the scale.
[0012] Furthermore, in the above-mentioned life test device for the long tension spring, the marking block is slidably connected to the scale, and the marking block is magnetically attracted to the scale.
[0013] Furthermore, in the above-mentioned long tension spring life test device, three marking blocks are provided.
[0014] Furthermore, the above-mentioned long tension spring life test device also includes an instrument, which is connected to the long-stroke cylinder and is used to control the movement of the piston rod.
[0015] Furthermore, in the above-mentioned long tension spring life test device, the box body is rotatably connected to a box door.
[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a long tension spring life test device, which uses a long-stroke cylinder to effectively and sufficiently stretch the long tension spring, and the limit hook structure limits the long tension spring hook, preventing the long tension spring from detaching from the upper fixed hook and the lower fixed hook during the test. The long tension spring life test device can be used not only for ordinary tension springs, but also for long tension springs, solving the problem that the existing tension spring life test device cannot well test the life of long tension springs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the utility model without the box body;
[0020] Figure 3 for Figure 2 A is an enlarged schematic diagram;
[0021] The names of the components marked in the figure are as follows:
[0022] 1. Box body; 11. Support feet; 12. Box door; 2. Long-stroke cylinder; 21. Piston rod; 3. Instrument; 4. Guide rod; 5. Mounting plate; 6. Upper hook; 61. Fixed part; 62. Rotating part; 7. Lower hook; 8. Scale; 81. Marking block. DETAILED DESCRIPTION
[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.
[0024] Example: Please refer to Figure 1-3A life test device for a long tension spring includes a box body 1, a long-stroke cylinder 2, an instrument 3, a scale 8, an upper fixed hook 6 and a lower fixed hook 7. The long-stroke cylinder 2 is located outside the box body 1 and is fixedly connected to the upper end of the box body 1. The piston rod 21 of the long-stroke cylinder 2 passes through the upper plate of the box body 1 and enters the interior of the box body 1. The end of the piston rod 21 is fixedly connected to a mounting plate 5, and the two ends of the mounting plate 5 are respectively slidably connected to guide rods 4, which pass through the mounting plate 5 and are clearance-matched with the mounting plate 5. The two ends of the guide rod 4 are respectively fixedly connected to the upper plate and the lower plate of the box body 1. The guide rod 4 is used to limit the mounting plate 5 to move only in the vertical direction under the action of the long-stroke cylinder 2. An upper fixed hook 6 is fixedly connected to the mounting plate 5, and a lower fixed hook 7 is fixedly connected to the lower plate of the box body 1 just below the upper fixed hook 6. The upper fixed hook 6 and the lower fixed hook 7 are respectively provided with a limit hook structure for limiting the long tension spring. Specifically: the limit hook structure on the upper fixed hook 6 includes a fixed part 61 and a rotating part 62, the fixed part 61 is fixedly connected to the upper fixed hook 6, the rotating part 62 is rotatably connected to the fixed part 61, the fixed part 61 is located below the rotating part 62, the fixed part 61 and the rotating part 62 are respectively provided with a hook groove that cooperates with the hook of the tension spring, the fixed part 61 and the rotating part 62 are respectively provided with an external thread, and the fixed part 61 and the rotating part 62 are formed into a cylinder when they are fitted together. The nut at one end of 61 and the rotating part 62 with threads can be installed to fix the fixed part 61 and the rotating part 62 together; the hook limiting structure on the lower fixed hook part 7 includes a fixed part 61 and a rotating part 62, the fixed part 61 is fixedly connected to the lower fixed hook part 7, and the rotating part 62 is rotatably connected to the fixed part 61, the fixed part 61 is located above the rotating part 62, and the fixed part 61 and the rotating part 62 are respectively provided with hook grooves that cooperate with the pull hook of the tension spring, and the fixed part 61 and the rotating part 62 are respectively provided with external threads. When the fixed part 61 and the rotating part 62 are fitted together, a cylinder is formed, and the fixed part 61 and the rotating part 62 can be fixed together by installing a nut at one end of the fixed part 61 and the rotating part 62 with threads. When the tension spring needs to be tested, the rotating member 62 is rotated open to expose the hook groove of the fixed member 61, the hook of the tension spring is placed in the hook groove, the rotating member 62 is rotated to fit the fixed member 61, and then the nut is installed to fix the fixed member 61 and the rotating member 62 together, thus completing the restriction of the tension spring hook, so that the tension spring will not break away from the upper fixed hook 6 and the lower fixed hook 7 and fly out to hurt people during the test. Furthermore, two limiting hook structures are respectively provided on the upper fixed hook 6 and the lower fixed hook 7, so that two tension springs can be tested at one time.The scale 8 is located inside the box 1 and is fixedly connected to the box 1. The scale 8 is used to measure the tensile length of the tension spring. The scale 8 is provided with a plurality of marking blocks 81. The marking blocks 81 are used to locate the position of the tension spring hook. The marking blocks 81 are slidably connected to the scale 8, which is convenient for moving the marking blocks 81. Specifically, the scale 8 is provided with a slideway, and the marking block 81 is provided with a slider that cooperates with the slideway. The marking block 81 is provided with a magnet. The scale 8 is made of iron. The marking block 81 can be magnetically attracted to the scale 8, which is convenient for fixing the marking block 81 on the scale 8. There are three marking blocks 81. The instrument 3 is located outside the box 1 and is fixedly connected to the upper end of the box 1. The instrument 3 is connected to the long-stroke cylinder 2, and the movement of the piston rod 21 can be controlled by a signal. The box 1 is rotatably connected with a box door 12, which is made of transparent material. The box door 12 can be closed during the test to prevent external interference with the test. A support leg 11 is provided below the box 1 to support the box 1.
[0025] Working principle of the present embodiment: The present embodiment provides a life test device for a long tension spring, which uses a long-stroke cylinder 2 to effectively and sufficiently stretch the long tension spring, and the stretching length can reach 600 mm. The limit hook structure limits the pull hook of the long tension spring, preventing the long tension spring from detaching from the upper fixed hook 6 and the lower fixed hook 7 during the test. The life test device for a long tension spring can be used not only for ordinary tension springs, but also for long tension springs, solving the problem that the existing tension spring life test device cannot well test the life of long tension springs. Furthermore, the scale 8 and the marking block 81 facilitate positioning and marking the stretching length of the long tension spring. Furthermore, two limit hook structures are respectively provided on the upper fixed hook 6 and the lower fixed hook 7, so that two tension springs can be tested at a time. The method of using the long tension spring life test device is as follows: first, hang the long tension spring on the upper fixed hook 6 and the lower fixed hook 7, rotate the rotating member 62 to open so that the hook groove of the fixed member 61 is exposed, and after the hook is placed, the rotating member 62 is rotated and closed on the fixed member 61, and the fixed member 61 and the rotating member 62 are fixed together by a nut to complete the restriction of the long tension spring hook, and the operating instrument 3 controls the long stroke cylinder 2 to naturally stand up the long tension spring vertically. At this time, a marking block 81 is moved to the upper end height position of the long tension spring on the scale 8, and then the long stroke cylinder 2 is controlled to stretch the long tension spring to a length of one. At this time, another marking block 81 is moved to the long tension spring on the scale 8. At the upper height position, the long-stroke cylinder 2 is then controlled to stretch the long tension spring to length two. At this time, the remaining marking block 81 on the scale 8 is moved to the upper height position of the long tension spring. The length one and the length two are set according to the customer's usage conditions of the long tension spring. The distance between the length one and the length two is the stretching stroke of the long tension spring when working. Thereafter, the long-stroke cylinder 2 is controlled to repeatedly stretch and relax the long tension spring between the length one and the length two until the long tension spring breaks and fails. The number of times the long tension spring is stretched from length one to length two during the test is recorded to evaluate and determine the service life of the long tension spring. The life test device of the long tension spring can test the life of two long tension springs at a time.
[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.
[0027] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A life test device for a long tension spring, characterized in that: The invention comprises a box body (1), a long-stroke cylinder (2) is arranged above the box body (1), a piston rod (21) of the long-stroke cylinder (2) is located inside the box body (1), the end of the piston rod (21) is fixedly connected to a mounting plate (5), an upper fixed hook (6) is arranged on the mounting plate (5), a lower fixed hook (7) is arranged inside the box body (1) below the upper fixed hook (6), and the upper fixed hook (6) and the lower fixed hook (7) are respectively provided with a hook limiting structure for limiting the pull hook of the long tension spring.
2. The life test device of the long tension spring according to claim 1, characterized in that: The hook limiting structure on the upper fixed hook member (6) comprises a fixed member (61) and a rotating member (62); the fixed member (61) is fixedly connected to the upper fixed hook member (6); the rotating member (62) is rotatably connected to the fixed member (61); the fixed member (61) is located below the rotating member (62); the fixed member (61) and the rotating member (62) are provided with hook grooves; and the fixed member (61) and the rotating member (62) are provided with external threads.
3. The life test device of the long tension spring according to claim 1, characterized in that: The hook limiting structure on the lower fixed hook member (7) comprises a fixed member (61) and a rotating member (62), wherein the fixed member (61) is fixedly connected to the lower fixed hook member (7), and the rotating member (62) is rotatably connected to the fixed member (61), the fixed member (61) is located above the rotating member (62), the fixed member (61) and the rotating member (62) are provided with hook grooves, and the fixed member (61) and the rotating member (62) are provided with external threads.
4. The life test device of the long tension spring according to claim 1, characterized in that: The upper fixed hook member (6) and the lower fixed hook member (7) are respectively provided with two of the hook limiting structures.
5. The life test device of the long tension spring according to claim 1, characterized in that: A guide rod (4) is also provided in the box body (1), and the guide rod (4) passes through the mounting plate (5) and is slidably connected to the mounting plate (5).
6. The life test device of a long tension spring according to claim 1, characterized in that: A scale (8) is provided in the box body (1), and a plurality of marking blocks (81) are provided on the scale (8).
7. The life test device of the long tension spring according to claim 6, characterized in that: The marking block (81) is slidably connected to the scale (8), and the marking block (81) is magnetically attracted to the scale (8).
8. The life test device of a long tension spring according to claim 6, characterized in that: There are three marking blocks (81).
9. The life test device of a long tension spring according to claim 1, characterized in that: It also includes an instrument (3), which is connected to the long-stroke cylinder (2) and is used to control the movement of the piston rod (21).
10. The life test device of a long tension spring according to claim 1, characterized in that: The box body (1) is rotatably connected to a box door (12).