Spiral compression spring

Abstract

The utility model is suitable for the technical field of springs, and provides a spiral compression spring which comprises a first end ring, a second end ring and an effective ring located between the first end ring and the second end ring, the end portion of the first end ring and the end portion of the second end ring are both formed in a rolling mode, and the end portion of the first end ring and the end portion of the second end ring are both provided with flat grinding portions. The first end ring and the second end ring are located at the two ends of the effective ring respectively. According to the spiral compression spring, by optimizing the structures of the end rings and the effective rings, all the effective rings, the effective rings and the first end ring and the effective rings and the second end ring do not make contact in the whole compression process of the spring, the problems of fatigue fracture and the like caused by overlarge contact stress borne by the spring are solved, and the service life of the spring is prolonged. The first end ring and the second end ring which are formed by grinding and the grinding parts on the end parts of the first end ring and the second end ring not only have a better cost reduction foundation, but also can effectively support the effective ring, so that the spring is ensured to have better use performance in the production, manufacturing, transportation and use processes.

Description

Technical Field

[0001] The utility model belongs to the technical field of springs, and particularly relates to a helical compression spring. Background Art

[0002] A compression spring is a helical spring that bears axial pressure, mainly used to resist and push back externally applied pressure and for shock absorption or energy storage. As a common mechanical component, a compression spring has extensive application value and important functional characteristics. Under the action of large alternating loads, in the traditional design of compression springs, due to excessive contact stress at the contact part between the active coils and the end coils, the spring undergoes fatigue fracture.

[0003] Existing compression springs generally avoid the problem of spring fatigue fracture by increasing the spring contact line or reducing the diameter of the end coils at both ends of the spring. By increasing the spring contact line, although the excessive stress can be shared, in order to meet the load characteristics of the spring, the contact line cannot be too large, which results in limited sharing ability and cannot fully avoid the spring fracture problem. And the method of reducing the diameter of the end coils at both ends of the spring, although it avoids the contact problem between the end coils and the active coils of the spring, due to the smaller diameter of the end coils at both ends than the diameter of the active coils, it makes production extremely inconvenient, increases the manufacturing cost, and in the case of installing a structure such as an oil pressure shock absorber of the same size in the inner diameter of the spring, this kind of structure is not applicable.

[0004] Therefore, in view of the above current situation, there is an urgent need to develop a helical compression spring to overcome the deficiencies in current practical applications. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the embodiment of the utility model is to provide a helical compression spring to solve the problems in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A helical compression spring, comprising a first end coil, a second end coil, and active coils located between the first end coil and the second end coil. The ends of the first end coil and the second end coil are both rolled and fixedly connected to the two ends of the active coils respectively. The first end coil and the second end coil are respectively located at the two ends of the active coils, and grinding portions are provided on the ends of both of them. The active coils bear static loads and alternating loads during the compression process;

[0008] When the compression ratio of the spring is large, the gaps between the first end coil and the second end coil and the active coils are small; when the compression ratio of the spring is small, the gaps between the first end coil and the second end coil and the active coils are large.

[0009] As a further technical solution of the present utility model, the end thickness of the first end coil and the second end coil is 0.25 times the wire diameter of the spring wire.

[0010] As a further technical solution of the present utility model, the end width of the first end coil and the second end coil is 0.8 times the wire diameter of the spring wire.

[0011] As a further technical solution of the present utility model, the rolled length of the first end coil and the second end coil is 0.7 times the mean diameter of the spring.

[0012] As a further technical solution of the present utility model, a plurality of active coils are provided between the first end coil and the second end coil.

[0013] As a further technical solution of the present utility model, the grinding range of the ground portions on the first end coil and the second end coil is 180 degrees each.

[0014] As a further technical solution of the present utility model, the diameters of the first end coil, the second end coil and each active coil of the spring are all unchanged.

[0015] As a further technical solution of the present utility model, the first end coil, the active coils and the second end coil are integrally formed.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The end thickness of the first end coil and the second end coil is within 0.25 times the wire diameter of the spring wire, the rolled length is within 0.7 times the mean diameter of the spring, the end width of the first end coil and the second end coil is about 0.8 times the wire diameter of the spring wire, and the grinding range of the ground portions on the end of the first end coil and the end of the second end coil is about 180 degrees each, and the maximum does not exceed 270 degrees. This can ensure a good cost reduction basis for the spring, and can also ensure that the first end coil and the second end coil can effectively support the active coils, ensuring good performance of the spring during production, transportation and use;

[0018] By optimizing the distribution of the structures of each coil, when the compression ratio is large, the gaps (i.e., the first active coil angles) between the first end coil and the second end coil and the active coils can be small; when the compression ratio of the spring is small, the gaps between the first end coil and the second end coil and the active coils can be large, so as to ensure that during the entire compression process of the spring, all active coils, between the active coils and the first end coil, and between the active coils and the second end coil do not contact each other, avoiding problems such as fatigue fracture of the spring due to excessive contact stress.

[0019] To more clearly illustrate the structural features and functions of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0020] Figure 1 This is the front view of the structure of the helical compression spring from the first perspective provided by the embodiment of the present utility model.

[0021] Figure 2 This is the front view of the structure of the helical compression spring from the second perspective provided by the embodiment of the present utility model.

[0022] Figure 3 is Figure 1 bottom view of the structure.

[0023] Reference numerals: 100 - first end coil, 200 - second end coil, 300 - active coils, 400 - ground portion, 500 - chamfered portion. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] The following describes the specific implementation of the present utility model in detail with reference to specific embodiments.

[0026] As Figures 1 to 3 shown, as a helical compression spring provided by an embodiment of the present utility model, it includes a first end coil 100, a second end coil 200 and active coils 300 located between the first end coil 100 and the second end coil 200. The ends of the first end coil 100 and the second end coil 200 are both rolled, and ground portions 400 are provided on the ends of both. The first end coil 100 and the second end coil 200 are respectively located at both ends of the active coils 300 and play a supporting role for the active coils 300. The active coils 300 bear static loads or alternating loads during the compression process. By optimizing the distribution of the structures of each coil, when the compression ratio is large, the gaps (i.e., the first active coil angles) between the first end coil 100 and the second end coil 200 and the active coils 300 can be small; when the spring compression ratio is small, the gaps between the first end coil 100 and the second end coil 200 and the active coils 300 can be large, so as to ensure that during the entire compression process of the spring, there is no contact between all the active coils 300, between the active coils 300 and the first end coil 100, and between the active coils 300 and the second end coil 200, and to avoid problems such as fatigue fracture of the spring due to excessive contact stress.

[0027] As Figures 1 to 3 shown, as a preferred embodiment of the present utility model, the thickness of the ends of the first end coil 100 and the second end coil 200 is within 0.25 times the wire diameter of the spring wire.

[0028] AsFigures 1 to 3 As shown, as a preferred embodiment of the present utility model, the end widths of the first end coil 100 and the second end coil 200 are about 0.8 times the wire diameter of the spring.

[0029] As Figures 1 to 3 shown, as a preferred embodiment of the present utility model, the rolled lengths of the first end coil 100 and the second end coil 200 are within 0.7 times the mean diameter of the spring, not exceeding 0.7 times the mean diameter of the spring.

[0030] As Figures 1 to 3 shown, as a preferred embodiment of the present utility model, a plurality of active coils 300 are provided between the first end coil 100 and the second end coil 200.

[0031] As Figures 1 to 3 shown, as a preferred embodiment of the present utility model, the grinding ranges of the grinding portions 400 of the first end coil 100 and the second end coil 200 are both about 180 degrees, and the maximum does not exceed 270 degrees. For the first end coil 100 and the second end coil 200 formed by rolling, by controlling the thickness and width of the ends and the setting of the grinding portion 400, it not only has a good cost reduction basis, but also can effectively support the active coils 300.

[0032] As Figures 1 to 3 shown, as a preferred embodiment of the present utility model, the diameters of the first end coil 100, the second end coil 200 and the active coils 300 remain unchanged.

[0033] As Figures 1 to 3 shown, as a preferred embodiment of the present utility model, the first end coil 100, the second end coil 200 and the active coils 300 are integrally formed.

[0034] In this embodiment, during use, the first end coil 100 and the second end coil 200 are respectively in contact with external objects or directly installed on external objects. The grinding portions 400 on the first end coil 100 and the second end coil 200 are respectively in contact with the corresponding external objects, while the active coils 300 are not in contact with external objects;

[0035] As Figure 1 and Figure 2 shown, in order to meet other requirements of the spring, chamfering treatment can be performed on the ends of the first end coil 100 and the second end coil 200, that is, chamfered portions 500, and the specific structural manner can be adjusted according to actual needs.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A helical compression spring, characterized in that, It includes a first end coil, a second end coil and active coils located between the first end coil and the second end coil. The ends of the first end coil and the second end coil are both rolled and are respectively fixedly connected to both ends of the active coils. The first end coil and the second end coil are respectively located at both ends of the active coils, and grinding portions are provided on the ends of both of them. The active coils bear static loads and alternating loads during the compression process; When the compression ratio of the spring is large, the gaps between the first end coil and the second end coil and the active coils are small; when the compression ratio of the spring is small, the gaps between the first end coil and the second end coil and the active coils are large.

2. The helical compression spring according to claim 1, wherein, The thickness of the ends of the first end coil and the second end coil is 0.25 times the wire diameter of the spring wire.

3. The helical compression spring according to claim 2, wherein, The width of the ends of the first end coil and the second end coil is 0.8 times the wire diameter of the spring wire.

4. The helical compression spring according to claim 3, wherein, The rolling length of the first end coil and the second end coil is 0.7 times the mean diameter of the spring.

5. The helical compression spring according to claim 1, characterized in that, A number of active coils are provided between the first end coil and the second end coil.

6. The helical compression spring according to claim 1, characterized in that, The grinding ranges of the grinding portions on the first end coil and the second end coil are both 180 degrees.

7. The helical compression spring according to claim 5, wherein The diameters of the first end coil, the second end coil and each active coil of the spring are all unchanged.

8. The helical compression spring according to claim 1, characterized in that, The first end coil, the active coils and the second end coil are all integrally formed.

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