A compression spring structure that prevents bending

Abstract

The utility model discloses a kind of compression spring structures of anti-bending, belong to spring manufacturing technical field, and it includes spring body and guide rod, spring body is divided into one middle spring section and two end spring sections, the pitch of two end spring sections is less than the pitch of middle spring section, spring body is sleeved in the outer ring of guide rod, variable-pitch spring is used, the rigidity support intensity of two ends is guaranteed, eccentric gap during installation is eliminated, axial load is evenly transmitted along spring body axis, bending moment caused by load eccentricity is avoided, the cross section of spring body spring wire is rectangle, each side of spring body is provided with inverted corner one, prevent crack from being caused by mutual friction when spring bears load, rectangular short side direction is parallel with the axis of spring body, rectangle can more efficiently resist radial lateral bending force, the device solves the problem that traditional spring is prone to axial bending, lateral buckling instability under the condition of large load, long diameter ratio.

Description

Technical Field

[0001] This utility model belongs to the field of spring manufacturing technology, specifically relating to a compression spring structure that prevents bending. Background Technology

[0002] Compression springs are commonly used elastic elements in the mechanical field. They absorb external forces and store elastic potential energy by relying on their own axial compression deformation, and are widely used in scenarios such as shock absorption, reset, and clamping.

[0003] However, traditional compression springs are mostly of equal-pitch helical structure. When subjected to large axial loads or with a large length-to-diameter ratio, they are prone to axial bending and lateral bending instability, resulting in uneven force distribution and localized stress concentration. This not only reduces the elastic performance and service life of the spring but may also cause the entire equipment to malfunction due to bending deformation exceeding the design range. Therefore, this phenomenon has become a problem that urgently needs to be solved by those in the field. Utility Model Content

[0004] The purpose of this invention is to provide a compression spring structure that prevents bending, thereby solving the problem that traditional springs are prone to axial bending and lateral bending instability under high load and length-to-diameter ratio conditions.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bending-resistant compression spring structure, including a spring body and a guide rod. The spring body is divided into a middle spring section and two end spring sections. The pitch of the two end spring sections is smaller than that of the middle spring section. The spring body is sleeved on the outer ring of the guide rod. A variable pitch spring is used to ensure the rigid support strength at both ends, eliminate the installation eccentric gap, and make the axial load uniformly transmitted along the axis of the spring body, avoiding bending moment caused by load eccentricity.

[0006] The present invention further explains that the cross-section of the spring body wire is rectangular, and each side of the spring body is provided with a rounded corner to prevent the springs from rubbing against each other and causing cracks when bearing load. The short side of the rectangle is parallel to the axis of the spring body, and the rectangle can resist radial bending force more efficiently.

[0007] This utility model further explains that the axial position of the guide rod in the spring body corresponds to the middle spring segment, the length of the guide rod is adapted to the length of the middle spring segment, the guide rod has a hollow structure, and the outer diameter of the guide rod is greater than half of the inner diameter of the spring body, which restricts the radial displacement of the spring body and avoids radial offset and lateral bending of the spring due to external factors.

[0008] This utility model further illustrates that guide sleeves are tightly fitted at both ends of the guide rod, and the outer side of the guide sleeve is loosely fitted with the two end spring segments. The lengths of the two end spring segments are adapted to the length of the guide sleeve.

[0009] This utility model further explains that an annular limiting platform is fixedly connected to the end of the guide sleeve away from the guide rod. The outer diameter of the limiting platform is larger than the outer diameter of the spring body and is coaxially arranged to prevent the spring from detaching from the guide rod when it rebounds. An annular limiting groove is opened on the side of the limiting platform facing the guide rod. The inside of the limiting groove abuts against the two end spring segments to provide guidance for the movement of the spring.

[0010] This utility model further explains that each side inside the limiting groove is provided with a rounded corner II to prevent excessive sharpness from scratching the spring body, and the side of the guide sleeve away from the limiting groove is provided with a rounded corner III to prevent scratching the guide rod.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model, by setting a spring body with small pitch at both ends and large pitch in the middle, achieves rigid support at both ends, eliminates installation eccentric gap, and makes the axial load uniformly transmitted along the axis, thereby improving the basic performance of the spring against bending; by setting a spring wire with a rectangular cross section, the bending section modulus of the spring body is greatly improved, and the ability to resist radial lateral bending force is enhanced. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a breakdown diagram of the present invention; Figure 3 This is a schematic diagram of the cross-section of the spring wire of this utility model; Figure 4 This is a schematic diagram of the connection between the guide sleeve and the limiting platform of this utility model; In the diagram: 1. Spring body; 2. Middle spring section; 3. End spring section; 4. Rounded corner one; 5. Guide rod; 6. Guide sleeve; 7. Limiting platform; 8. Limiting groove; 9. Rounded corner two. Detailed Implementation

[0013] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] Please see Figure 1-4This utility model provides a technical solution: a compression spring structure for preventing bending, including a spring body 1 and a guide rod 5. The spring body 1 is divided into a middle spring section 2 and two end spring sections 3. The pitch of the two end spring sections 3 is smaller than the pitch of the middle spring section 2. The spring body 1 is sleeved on the outer ring of the guide rod 5. A variable pitch spring is used to ensure the rigid support strength at both ends, eliminate the installation eccentric gap, and make the axial load uniformly transmitted along the axis of the spring body 1, avoiding bending moment caused by load eccentricity.

[0015] The cross-section of the spring body 1 and the spring wire is rectangular. Each side of the spring body 1 is provided with a rounded corner 4 to prevent the springs from rubbing against each other when bearing load, which would cause cracks. The short side of the rectangle is parallel to the axis of the spring body 1. The rectangle can resist radial bending force more efficiently.

[0016] The axial position of the guide rod 5 in the spring body 1 corresponds to the middle spring segment 2. The length of the guide rod 5 is matched with the length of the middle spring segment 2. The guide rod 5 is a hollow structure. The outer diameter of the guide rod 5 is greater than half of the inner diameter of the spring body 1, which restricts the radial displacement of the spring body 1 and avoids radial offset and lateral bending of the spring due to external factors.

[0017] Guide sleeves 6 are tightly fitted at both ends of the guide rod 5. The outer part of the guide sleeve 6 is loosely fitted with the two end spring segments 3. The length of the two end spring segments 3 is adapted to the length of the guide sleeve 6.

[0018] A ring-shaped limiting platform 7 is fixedly connected to the end of the guide sleeve 6 away from the guide rod 5. The outer diameter of the limiting platform 7 is larger than the outer diameter of the spring body 1 and is coaxially arranged to prevent the spring from detaching from the guide rod 5 when it rebounds. A ring-shaped limiting groove 8 is opened on the side of the limiting platform 7 facing the guide rod 5. The inside of the limiting groove 8 abuts against the two end spring segments 3 to provide guidance for the movement of the spring.

[0019] Each side of the limiting groove 8 is provided with rounded corner 2 9 to prevent excessive sharpness from scratching the spring body 1. The side of the guide sleeve 6 away from the limiting groove 8 is provided with rounded corner 3 to prevent scratching the guide rod 5.

[0020] Working principle: When an axial load is applied to both ends of the spring body 1, the end spring segment 3 with the smaller pitch forms a rigid support segment. The end spring segment 3 is in close contact with the limiting groove 8, ensuring that the load is evenly transmitted along the axis of the spring body 1. The rectangular cross-section of the spring wire not only improves the ability to resist radial bending force but also avoids friction damage between the spring wires, while also serving a limiting function. The spring body 1 performs axial compression and rebound motion along the guide rod 5. The guide rod 5 can effectively limit the radial displacement of the spring body 1, providing precise guidance for the reciprocating motion of the spring and ensuring that the spring body 1 moves along the axial direction throughout its entire movement without the risk of bending deformation.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A compression spring structure for preventing bending, comprising a spring body (1) and a guide rod (5), characterized in that: The spring body (1) is divided into a middle spring segment (2) and two end spring segments (3). The pitch of the two end spring segments (3) is smaller than the pitch of the middle spring segment (2). The spring body (1) is sleeved on the outer ring of the guide rod (5).

2. The anti-bending compression spring structure according to claim 1, characterized in that: The cross-section of the spring wire of the spring body (1) is rectangular, and each side of the spring body (1) is provided with a rounded corner (4). The direction of the short side of the rectangle is parallel to the axis of the spring body (1).

3. The anti-bending compression spring structure according to claim 2, characterized in that: The axial position of the guide rod (5) in the spring body (1) corresponds to the middle spring section (2). The length of the guide rod (5) is adapted to the length of the middle spring section (2). The guide rod (5) is a hollow structure. The outer diameter of the guide rod (5) is greater than half the inner diameter of the spring body (1).

4. The anti-bending compression spring structure according to claim 3, characterized in that: The guide rod (5) is fitted with guide sleeves (6) at both ends. The guide sleeves (6) are fitted with two end spring segments (3) with a clearance. The length of the two end spring segments (3) is matched with the length of the guide sleeves (6).

5. The anti-bending compression spring structure according to claim 4, characterized in that: The guide sleeve (6) is fixedly connected to an annular limiting platform (7) at one end away from the guide rod (5). The outer diameter of the limiting platform (7) is larger than the outer diameter of the spring body (1) and is coaxially arranged. The limiting platform (7) has an annular limiting groove (8) on the side facing the guide rod (5). The inside of the limiting groove (8) abuts against the two end spring segments (3).

6. The anti-bending compression spring structure according to claim 5, characterized in that: The limiting groove (8) has rounded corners (9) on each side, and the guide sleeve (6) has rounded corners (3) on the side away from the limiting groove (8).

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