Spiral compression spring

Abstract

The invention 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 of the first end ring and the end of the second end ring are both formed through grinding, and grinding parts are arranged on the end of the first end ring and the end of the second end ring. 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, it can be guaranteed that 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 too large 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 invention belongs to the technical field of springs, and in particular relates to a helical compression spring. Background Art

[0002] A compression spring is a coil spring that withstands axial pressure. It is mainly used to resist and push back external pressure and is used for vibration reduction or energy storage. As a common mechanical component, compression springs have wide application value and important functional characteristics. Under the action of large alternating loads, traditionally designed compression springs will suffer fatigue fractures at the contact point between the effective circle and the end circle due to excessive contact stress.

[0003] Existing compression springs generally avoid fatigue fracture problems of springs by increasing the spring contact line or reducing the diameter of the end rings at both ends of the spring. Although the method of increasing the spring contact line can share excessive stress, in order to meet the load characteristics of the spring, the contact line cannot be too large, which leads to its limited sharing capacity and cannot fully avoid the problem of spring fracture. Although the method of reducing the diameter of the end rings at both ends of the spring avoids the contact problem between the spring end rings and the effective ring, the diameter of the end rings at both ends is smaller than the diameter of the effective ring, which makes production extremely inconvenient and increases manufacturing costs. In addition, due to the smaller diameter of the end rings at both ends, this structure is not suitable for installing a hydraulic shock absorber-like structure of the same size in the inner diameter of the spring.

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

[0005] In view of the deficiencies in the prior art, an object of the embodiments of the present invention is to provide a helical compression spring to solve the problems in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A helical compression spring, comprising a first end ring, a second end ring and an effective ring located between the first end ring and the second end ring, the ends of the first end ring and the second end ring are both rolled and fixedly connected to the two ends of the effective ring, the first end ring and the second end ring are respectively located at the two ends of the effective ring and both ends are provided with a flattened portion, and the effective ring bears a static load and an alternating load during compression; When the compression ratio of the spring is large, the gaps between the first end circle and the second end circle and the effective circle are small; when the compression ratio of the spring is small, the gaps between the first end circle and the second end circle and the effective circle are large.

[0007] As a further technical solution of the present invention, the thickness of the ends of the first end ring and the second end ring is 0.25 times the diameter of the spring wire.

[0008] As a further technical solution of the present invention, the end widths of the first end ring and the second end ring are 0.8 times the diameter of the spring wire.

[0009] As a further technical solution of the present invention, the rolling length of the first end ring and the second end ring is 0.7 times the middle diameter of the spring.

[0010] As a further technical solution of the present invention, a plurality of effective circles are arranged between the first end circle and the second end circle.

[0011] As a further technical solution of the present invention, the grinding range of the grinding parts on the first end ring and the second end ring is 180 degrees.

[0012] As a further technical solution of the present invention, the diameters of the first end ring, the second end ring and each effective ring of the spring remain unchanged.

[0013] As a further technical solution of the present invention, the first end ring, the effective ring and the second end ring are all integrally formed.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The thickness of the end of the first end ring and the second end ring is within 0.25 times of the spring wire diameter, the rolling length is within 0.7 times of the spring middle diameter, the width of the end of the first end ring and the second end ring is about 0.8 times of the spring wire diameter, and the grinding range of the grinding part on the end of the first end ring and the end of the second end ring is about 180 degrees, and the maximum does not exceed 270 degrees, which can ensure that the spring has a good cost reduction basis, and can ensure that the first end ring and the second end ring can effectively support the effective ring, and ensure that the spring has good performance during production, transportation and use; By optimizing the distribution structure of each circle, when the compression ratio is large, the gap between the first end circle and the second end circle and the effective circle (i.e., the first effective circle angle) can be small; when the compression ratio of the spring is small, the gap between the first end circle and the second end circle and the effective circle can be large, so as to ensure that during the entire compression process of the spring, there is no contact between all the effective circles, between the effective circle and the first end circle, and between the effective circle and the second end circle, so as to avoid problems such as fatigue fracture of the spring due to excessive contact stress.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural front view of a helical compression spring from a first viewing angle provided by an embodiment of the present invention.

[0017] Figure 2A structural front view of the helical compression spring provided by an embodiment of the present invention from a second viewing angle.

[0018] Figure 3 for Figure 1 Bottom view of the structure.

[0019] Figure numerals: 100 - first end circle, 200 - second end circle, 300 - effective circle, 400 - flattened portion, 500 - beveled portion. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0022] like Figures 1 to 3 As shown, a helical compression spring provided as an embodiment of the present invention comprises a first end ring 100, a second end ring 200 and an effective ring 300 located between the first end ring 100 and the second end ring 200, the ends of the first end ring 100 and the second end ring 200 are both rolled and both ends are provided with a flattened portion 400, the first end ring 100 and the second end ring 200 are respectively located at the two ends of the effective ring 300 and play a supporting role for the effective ring 300, the effective ring 300 bears a static load or an alternating load during the compression process, and the effective ring 300 is subjected to a static load or an alternating load by optimizing the distribution. For the structure of each coil, when the compression ratio is large, the gap between the first end coil 100 and the second end coil 200 and the effective coil 300 (i.e., the first effective coil angle) can be small; when the compression ratio of the spring is small, the gap between the first end coil 100 and the second end coil 200 and the effective coil 300 can be large, so as to ensure that during the entire compression process of the spring, there is no contact between all the effective coils 300, between the effective coil 300 and the first end coil 100, and between the effective coil 300 and the second end coil 200, so as to avoid problems such as fatigue fracture of the spring due to excessive contact stress.

[0023] like Figures 1 to 3 As shown, as a preferred embodiment of the present invention, the end thickness of the first end ring 100 and the second end ring 200 is within 0.25 times of the spring wire diameter.

[0024] like Figures 1 to 3 As shown, as a preferred embodiment of the present invention, the end widths of the first end ring 100 and the second end ring 200 are about 0.8 times the spring wire diameter.

[0025] like Figures 1 to 3As shown, as a preferred embodiment of the present invention, the rolling length of the first end ring 100 and the second end ring 200 is within 0.7 times of the spring center diameter and does not exceed 0.7 times of the spring center diameter.

[0026] like Figures 1 to 3 As shown, as a preferred embodiment of the present invention, a plurality of effective circles 300 are arranged between the first end circle 100 and the second end circle 200 .

[0027] like Figures 1 to 3 As shown, as a preferred embodiment of the present invention, the grinding range of the grinding portion 400 of the first end ring 100 and the second end ring 200 is about 180 degrees, and the maximum does not exceed 270 degrees. The first end ring 100 and the second end ring 200, which are rolled, not only have a good cost reduction basis by controlling the thickness and width of the end parts and the setting of the grinding portion 400, but also can play an effective supporting role for the effective ring 300.

[0028] like Figures 1 to 3 As shown, as a preferred embodiment of the present invention, the diameters of the first end ring 100, the second end ring 200 and the effective ring 300 are all unchanged.

[0029] like Figures 1 to 3 As shown, as a preferred embodiment of the present invention, the first end ring 100, the second end ring 200 and the effective ring 300 are all integrally formed.

[0030] In this embodiment, when in use, the first end ring 100 and the second end ring 200 are in contact with an external object or are directly mounted on an external object, and the flattened portions 400 on the first end ring 100 and the second end ring 200 are in contact with the corresponding external objects, while the effective ring 300 is not in contact with the external object. like Figure 1 and Figure 2 As shown, in order to meet other requirements of the spring, the ends of the first end ring 100 and the second end ring 200 can be beveled, that is, a beveled portion 500, and the specific structure can be adjusted according to actual needs.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A helical compression spring, characterized in that: It 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 ends of the first end ring and the second end ring are both rolled and fixedly connected to the two ends of the effective ring, the first end ring and the second end ring are respectively located at the two ends of the effective ring and both ends are provided with a flattened portion, and the effective ring bears a static load and an alternating load during the compression process; When the compression ratio of the spring is large, the gaps between the first end circle and the second end circle and the effective circle are small; when the compression ratio of the spring is small, the gaps between the first end circle and the second end circle and the effective circle are large.

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

3. The helical compression spring according to claim 1, characterized in that: The width of the ends of the first end ring and the second end ring is 0.8 times the diameter of the spring wire.

4. The helical compression spring according to claim 1, characterized in that The rolling length of the first end ring and the second end ring is 0.7 times the spring center diameter.

5. The helical compression spring according to claim 1, characterized in that: A plurality of effective circles are arranged between the first end circle and the second end circle.

6. The helical compression spring according to claim 1, characterized in that: The grinding range of the grinding parts on the first end ring and the second end ring is 180 degrees.

7. The helical compression spring according to claim 5, characterized in that The diameters of the first end ring, the second end ring and each effective ring of the spring remain unchanged.

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

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