High-strength composite spring

Abstract

The utility model discloses a high-strength composite spring. The device comprises a shell, a stable structure and a composite structure, a main spring is welded to the bottom of the shell, the stabilizing structure is arranged at the top of the main spring, the stabilizing structure is composed of a connecting piece welded to the top of the main spring, and a connecting rod is welded to the upper surface of the connecting piece; the composite structure is arranged in the shell and comprises a stand column welded to the bottom of the shell. The main spring can be continuously lengthened under the action of the connecting piece by pulling the connecting rod, so that tension is increased, the first connecting strip and the second connecting strip are sequentially pushed by the connecting piece under the tension required to be increased, and the tension is increased under the tension of the first spring and the second spring; according to the device, the tensile length of the main spring can be reduced under the environment of required tensile force through a composite spring structure for increasing the tensile force value in a grading manner, and the effect of providing enough tensile force within a certain tensile range is ensured, so that the service life of the spring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of springs, in particular to a high-strength composite spring. Background Art

[0002] Extension springs are helical springs that bear axial tension. Extension springs are generally made of circular cross-section materials. When not bearing load, the coils of the extension spring are generally tight and there is no gap between them. They are widely used in hand tools, shock absorbing equipment, switch equipment machines, control valves and other tools.

[0003] Currently, in equipment scenarios where tension springs are used, multiple sets of springs are connected to increase the pulling force to meet the pulling force requirements. However, the use of multiple sets of springs in parallel limits the use range of the device, and the pulling spring will exceed the stretching limit of the spring after being stretched by a large pulling force, causing the spring to deform significantly and be unable to recover and be damaged, thereby reducing the service life of the spring. Therefore, a high-strength composite spring with a short pulling limit and high pulling force is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a high-strength composite spring to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-strength composite spring, comprising: an outer shell, a stabilizing structure and a composite structure; a main spring is welded to the bottom of the outer shell, the stabilizing structure is arranged on the top of the main spring, the stabilizing structure is composed of a connecting piece welded to the top of the main spring, and a connecting rod is welded to the upper surface of the connecting piece; the composite structure is arranged inside the outer shell, and the composite structure comprises a column welded to the bottom of the outer shell, a first spring passed through the column and welded to the bottom of the outer shell, a first connecting strip welded to the top of the first spring, a supporting sheet welded to the outer wall of another column, a second spring passed through the column and welded to the supporting sheet at the bottom, and a second connecting strip welded to the top of the second spring, and the first connecting strip and the second connecting strip are both plugged into the corresponding columns.

[0006] By adopting the above technical solution, the main spring can be continuously stretched by pulling the connecting rod under the action of the connecting piece to increase the tension. During the continuous stretching process, the connecting piece will be pressed against the first connecting strip to stretch the first spring, so that the tension on the connecting rod will increase rapidly. Under continuous pulling, it will contact the second connecting strip to stretch the second spring, so that the connecting rod can increase the tension to work at a shorter length. The device can reduce the stretching length of the main spring under the required tension environment through a composite spring structure that increases the tension value in stages, thereby ensuring that sufficient tension is provided within a certain stretching range to increase the service life of the spring.

[0007] Preferably, the stabilizing structure further comprises a limiting strip welded on the outer wall of the connecting piece and a limiting groove formed on the inner wall of the shell, and one end of the limiting strip is inserted into the limiting groove.

[0008] By adopting the above technical solution, by inserting a cross-shaped limit strip into the limit groove in the corresponding direction, the main spring at the bottom of the connecting piece can be kept in the center position to pull and provide pulling force, thereby improving the effect of using the main spring to pull down stably.

[0009] Preferably, a hook is welded to the lower surface of the shell, and a hook is also welded to the top of the connecting rod.

[0010] By adopting the above technical solution, the device can be conveniently hung on the equipment from both ends for use by welding hooks, thereby improving the convenience of installation and disassembly.

[0011] Preferably, the columns are welded with four groups on the lower surface inside the shell, and two symmetrical groups of the columns are provided with the same first spring and second spring, and the tops of the two groups of the first spring and the second spring are respectively connected to the first connecting strip and the second connecting strip.

[0012] By adopting the above technical solution, the first spring and the second spring are arranged through the columns in the symmetrical direction, so that after the connecting piece contacts the first connecting strip, it can evenly bear the tension provided by the first spring, and under continuous stretching, the first connecting strip is pressed against the second connecting strip to evenly bear the tension of the second spring, so as to ensure the uniformity of the tension and improve the stability of the composite spring.

[0013] Preferably, the top of the first spring is located below the top of the second spring, and the connecting rods pass through the center positions of the first connecting strip and the second connecting strip.

[0014] By adopting the above technical solution and setting the top positions of the first spring and the second spring, it is possible to achieve the effect of increasing the tension of the second spring after the first spring is stretched to a specified length, so as to ensure that the first spring and the second spring are used under the required different tensions, so that when the same tension is obtained under the required larger tension, the stretching amount of the main spring can be reduced, thereby extending the service life of the main spring.

[0015] Preferably, the stiffness coefficient of the second spring is greater than the stiffness coefficient of the first spring, and the stiffness coefficient of the main spring is greater than the stiffness coefficients of the first spring and the second spring.

[0016] By adopting the above technical solution and setting the stiffness coefficients of the second spring and the first spring, the amplitude of the increased pulling force can be increased when the second spring is required to provide pulling force, so as to slow down the elongation of the main spring and the first spring, ensuring that they both work stably within the elastic deformation range.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] By pulling the connecting rod, the main spring can be continuously stretched under the action of the connecting piece to increase the tension. Under the tension required for continuous stretching, the connecting piece will push the first connecting strip and the second connecting strip in turn, and increase the tension under the stretching of the first spring and the second spring. The device can reduce the stretching length of the main spring under the required tension environment through a composite spring structure that increases the tension value in stages, ensuring that sufficient tension is provided within a certain stretching range, thereby increasing the service life of the spring.

[0019] By inserting a cross-shaped limit strip into the limit groove in the corresponding direction, the main spring at the bottom of the connecting piece can be kept in the center position to provide pulling force, thereby improving the effect of using the main spring to pull down stably. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a schematic diagram of the composite structure of the utility model;

[0022] Figure 3 This is a cross-sectional view of the overall structure of the device of the utility model;

[0023] Figure 4 For the utility model Figure 2 Top view of the structure.

[0024] In the figure: 1. outer shell; 2. main spring; 3. stabilizing structure; 301. connecting plate; 302. limiting strip; 303. limiting groove; 4. connecting rod; 5. composite structure; 501. column; 502. first spring; 503. first connecting strip; 504. supporting plate; 505. second spring; 506. second connecting strip; 6. hook. DETAILED DESCRIPTION

[0025] 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.

[0026] The following is combined with Figure 1-4 The utility model is described in further detail.

[0027] Embodiment 1

[0028] See also Figures 1 to 4The utility model provides an embodiment: a high-strength composite spring, comprising: a shell 1, a stabilizing structure 3 and a composite structure 5, a main spring 2 is welded to the bottom of the shell 1, the stabilizing structure 3 is arranged on the top of the main spring 2, the stabilizing structure 3 is composed of a connecting piece 301 welded to the top of the main spring 2, a connecting rod 4 is welded to the upper surface of the connecting piece 301, the composite structure 5 is arranged inside the shell 1, the composite structure 5 comprises a column 501 welded to the bottom of the shell 1, a first spring 502 passed through the column 501 and welded to the bottom of the shell 1, a first connecting strip 503 welded to the top of the first spring 502, a supporting sheet 504 welded to the outer wall of another column 501, a second spring 505 passed through the column 501 and welded to the supporting sheet 504 at the bottom, and a connecting strip 503 welded to the first spring 502. The second connecting strip 506 at the top of the spring 505, the first connecting strip 503 and the second connecting strip 506 are all inserted into the corresponding column 501. By pulling the connecting rod 4, the main spring 2 can be continuously stretched under the action of the connecting piece 301 to increase the tension. During the continuous stretching process, the connecting piece 301 will be pressed against the first connecting strip 503 to stretch the first spring 502, so that the tension on the connecting rod 4 will increase rapidly. Under continuous pulling, it will contact the second connecting strip 506 to stretch the second spring 505, so that the connecting rod 4 can increase the tension to work when stretched to a shorter length. The device can reduce the stretching length of the main spring 2 under the required tension environment through a composite spring structure that increases the tension value in stages, thereby ensuring that sufficient tension is provided within a certain stretching range to increase the service life of the spring.

[0029] Embodiment 2

[0030] See also Figures 1 to 4The stabilizing structure 3 also includes a limiting strip 302 welded on the outer wall of the connecting piece 301 and a limiting groove 303 opened on the inner wall of the shell 1. One end of the limiting strip 302 is inserted into the limiting groove 303. By adopting a cross limiting strip 302 inserted into the limiting groove 303 in the corresponding direction, the main spring 2 at the bottom of the connecting piece 301 can be kept in the center position for pulling to provide tension, thereby improving the effect of using the main spring 2 to pull down stably. A hook 6 is welded on the lower surface of the shell 1, and a hook 6 is also welded on the top of the connecting rod 4. By welding the hook 6, it is convenient to hang it on the equipment from both ends for use, which can improve the convenience of installation and disassembly. The column 501 is welded with four groups of external On the lower surface of the interior of the shell 1, two symmetrical groups of columns 501 are provided with identical first springs 502 and second springs 505, and the tops of the two groups of first springs 502 and second springs 505 are respectively connected to the first connecting strip 503 and the second connecting strip 506. The first springs 502 and the second springs 505 are provided by the columns 501 in symmetrical directions, so that after the connecting piece 301 contacts the first connecting strip 503, it can evenly withstand the tension provided by the first spring 502, and under continuous stretching, the first connecting strip 503 is pressed against the second connecting strip 506 to evenly withstand the tension of the second spring 505, so as to ensure the uniformity of the tension and improve the stability of the composite spring.

[0031] Embodiment 3

[0032] See also Figures 1 to 4 , the top of the first spring 502 is located below the top of the second spring 505, and the connecting rod 4 passes through the center positions of the first connecting strip 503 and the second connecting strip 506. By setting the top positions of the first spring 502 and the second spring 505, the effect of increasing the pulling force of the second spring 505 after the first spring 502 is stretched to a specified length can be achieved, so as to ensure that the first spring 502 and the second spring 505 are used under the required different pulling forces, so that when the same pulling force is obtained under the required larger pulling force, the stretching amount of the main spring 2 can be reduced, and the service life of the main spring 2 can be extended. The stiffness coefficient of the second spring 505 is greater than the stiffness coefficient of the first spring 502, and the stiffness coefficient of the main spring 2 is greater than the stiffness coefficient of the first spring 502 and the second spring 505. By setting the stiffness coefficients of the second spring 505 and the first spring 502, the amplitude of the increased pulling force value can be increased when the second spring 505 is required to provide pulling force, so as to slow down the elongation of the main spring 2 and the first spring 502, and ensure that both work stably within the elastic deformation.

[0033] Working principle: When in use, the hooks 6 at both ends of the shell 1 are hung at the required positions of the device. When the connecting rod 4 is subjected to tension, the main spring 2 is used to stretch and provide tension. When the required tension increases, the connecting piece 301 will contact the first connecting strip 503 to stretch the first spring 502 to provide tension. As the required tension continues to increase, the connecting piece 301 will press against the first connecting strip 503 and the second connecting strip 506 to stretch the second spring 505 to provide tension, so that the device forms a high-strength, high-tension composite spring.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. A high-strength composite spring, characterized in that: include: A housing (1), wherein a main spring (2) is welded to the bottom of the housing (1); A stabilizing structure (3), the stabilizing structure (3) being arranged on the top of the main spring (2), the stabilizing structure (3) comprising a connecting piece (301) welded to the top of the main spring (2), a connecting rod (4) being welded to the upper surface of the connecting piece (301); A composite structure (5), the composite structure (5) being arranged inside a housing (1), the composite structure (5) comprising a column (501) welded to the bottom of the housing (1), a first spring (502) passing through the column (501) and having its bottom welded to the bottom of the housing (1), a first connecting strip (503) welded to the top of the first spring (502), a supporting sheet (504) welded to the outer wall of another column (501), a second spring (505) passing through the column (501) and having its bottom welded to the supporting sheet (504), and a second connecting strip (506) welded to the top of the second spring (505), wherein the first connecting strip (503) and the second connecting strip (506) are both plugged into the corresponding column (501).

2. A high-strength composite spring according to claim 1, characterized in that: The stabilizing structure (3) further comprises a limiting strip (302) welded on the outer wall of the connecting piece (301) and a limiting groove (303) provided on the inner wall of the outer shell (1), one end of the limiting strip (302) being inserted into the limiting groove (303).

3. A high-strength composite spring according to claim 1, characterized in that: A hook (6) is welded to the lower surface of the shell (1), and a hook (6) is also welded to the top of the connecting rod (4).

4. A high-strength composite spring according to claim 1, characterized in that: The column (501) is welded with four groups on the lower surface inside the housing (1), and two symmetrical groups of the column (501) are provided with identical first springs (502) and second springs (505), and the tops of the two groups of the first springs (502) and second springs (505) are respectively connected to the first connecting strip (503) and the second connecting strip (506).

5. A high-strength composite spring according to claim 1, characterized in that: The top of the first spring (502) is located below the top of the second spring (505), and the connecting rod (4) passes through the center positions of the first connecting strip (503) and the second connecting strip (506).

6. A high-strength composite spring according to claim 1, characterized in that: The stiffness coefficient of the second spring (505) is greater than the stiffness coefficient of the first spring (502), and the stiffness coefficient of the main spring (2) is greater than the stiffness coefficients of the first spring (502) and the second spring (505).

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