Anti-bending spring with special-shaped section

Abstract

The utility model discloses an anti-bending spring with a special-shaped section, and belongs to the technical field of springs. Aiming at the problem that the bending resistance of a spring in the prior art needs to be improved, the bending-resistant spring with the special-shaped section adopts the hexagonal section, so that the moment of inertia of the section is improved, the bending rigidity is improved, and complex bending moment loads are effectively dealt with. The overall weight is reduced on the premise that the bearing capacity is guaranteed due to the introduction of the internal hollow cavity, meanwhile, a stable supporting frame is formed by combining the radial reinforcing ribs between the center point and the vertex of the hexagonal inner angle, the defect that the hollow structure is prone to buckling is overcome, local peak stress is reduced through stress diffusion, and the fatigue life is remarkably prolonged. The six reinforcing ribs evenly distributed on the outer side in the circumferential direction continuously extend along the spiral axis of the spring, the extending track is consistent with the spiral lead angle of the spring coil, the bending-resistant inertia moment of the section is further increased, a contact interface is optimized through a streamline outline, traditional point contact at the corner angle is converted into line contact, the contact stress is reduced, and frictional wear is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of spring technology, specifically relating to an irregular cross-section anti-bending spring. Background Technology

[0002] In the fields of mechanical transmission and precision equipment, traditional springs generally adopt circular or rectangular cross-section designs. Their inherent defects severely restrict system performance: circular cross-sections, due to material distribution close to the neutral axis, result in low bending moment of inertia (only 60%-70% of that of hexagons), making them unsuitable for complex bending moment loads; while rectangular cross-sections can directionally enhance stiffness, they exhibit significant anisotropy, making them unsuitable for multi-directional stress scenarios. More seriously, the sharp corners of traditional polygonal cross-sections are prone to stress concentration, with local stress peaks reaching 2-3 times the average value, becoming preferential initiation zones for fatigue cracks. The conflict between lightweight requirements and performance improvements is particularly prominent—solid structures add significant weight, while hollow circular tube cross-sections are prone to buckling instability due to a lack of internal support.

[0003] To address the aforementioned problems, this utility model attempts to solve or at least alleviate the problem of poor bending resistance by providing an irregularly shaped cross-section bending spring. Utility Model Content

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, this utility model provides an irregular cross-section anti-bending spring, which has the advantage of strong anti-bending ability.

[0005] To achieve the above objectives, this utility model provides an irregular cross-section anti-bending spring, comprising: an irregular cross-section spring, wherein the cross-section of the irregular cross-section spring is hexagonal, and a hollow cavity is provided inside the irregular cross-section spring.

[0006] As a further improvement of this utility model, the cross-section of the hollow cavity is a regular hexagon, and reinforcing ribs are provided between the center point of the hollow cavity and each of the interior corner vertices.

[0007] As a further improvement of this utility model, a reinforcing rib is provided on the outer side of the irregular cross-section spring, and the reinforcing rib extends along the helical axis of the irregular cross-section spring.

[0008] As a further improvement of this utility model, the irregular cross-section spring has six reinforcing ribs evenly distributed circumferentially in the middle of each side of the hexagonal cross-section. The reinforcing ribs extend continuously along the direction of the spring helical axis, and the extension trajectory is parallel to the direction of the helical helix angle of the spring coil.

[0009] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0010] The hexagonal cross-section design of this novel irregular-section bending spring significantly increases the distance of material distribution from the neutral axis compared to traditional circular or rectangular cross-sections, thereby enhancing the moment of inertia and bending stiffness, effectively handling complex bending moment loads. The introduction of an internal hollow cavity reduces overall weight while maintaining load-bearing capacity. Combined with radial reinforcing ribs between the center point and the vertices of the hexagon, a stable support frame is formed, avoiding the buckling defects of hollow structures and reducing local peak stress through stress diffusion, significantly extending fatigue life. Six circumferentially distributed reinforcing ribs extend continuously along the spring's helical axis, with their extension trajectory consistent with the helix angle of the spring coil, further increasing the bending moment of inertia. The streamlined profile optimizes the contact interface, transforming traditional point contact at corners into line contact, reducing contact stress and frictional wear. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of an irregular cross-section anti-bending spring according to the present invention;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of an irregular cross-section bending spring according to the present invention.

[0013] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0014] 1. Irregular cross-section spring; 2. Reinforcing rib; 3. Hollow cavity; 4. Center point; 5. Inner corner vertex; 6. Reinforcing rib. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0017] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0018] In the embodiments, by Figure 1-2 Give, Figure 1 This is a schematic diagram of an irregular cross-section anti-bending spring according to the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of an irregular cross-section bending spring according to the present invention. It can be seen that the irregular cross-section spring 1 has a hollow cavity 3 inside, and a reinforcing rib 6 is provided in the hollow cavity 3. The reinforcing rib 6 connects the center point 4 and the inner corner vertex 5. The outer surface of the irregular cross-section spring 1 has a reinforcing rib 2.

[0020] An irregular cross-section bending spring includes: an irregular cross-section spring 1, wherein the cross-section of the irregular cross-section spring 1 is hexagonal, and a hollow cavity 3 is provided inside the irregular cross-section spring 1. The hollow cavity 3 reduces weight, allows for greater deformation without plastic deformation, and also reduces material consumption, making it suitable for quality-sensitive applications.

[0021] In a preferred embodiment of this invention, the hollow cavity 3 has a regular hexagonal cross-section, and reinforcing ribs 6 are provided between the center point 4 of the hollow cavity 3 and each of the interior corner vertices 5. The reinforcing ribs 6 connect the outer frame and the central cavity, which can reduce stress concentration and extend fatigue life.

[0022] In a preferred embodiment of this utility model, a reinforcing rib 2 is provided on the outer side of the irregular cross-section spring 1, and the reinforcing rib 2 extends along the helical axis of the irregular cross-section spring 1. The line contact between the arc-shaped outer surface and the mating part replaces the traditional point contact of the sharp corners, reducing the contact stress. The arc-shaped protrusion expands the material outward, increases the distance of the neutral axis of the cross-section, improves the moment of inertia of the cross-section, and enhances the bending resistance.

[0023] As a preferred embodiment of this utility model, the irregular cross-section spring 1 has six reinforcing ribs 2 evenly distributed circumferentially at the center of each side of its hexagonal cross-section. The reinforcing ribs 2 extend continuously along the helical axis of the spring, and their extension trajectory is parallel to the direction of the helical helix angle of the spring coil. The six reinforcing ribs 2 are evenly distributed circumferentially, which can further enhance the bending resistance.

[0024] In summary, the hexagonal cross-section design of this novel irregular-section bending spring, compared to traditional circular or rectangular cross-sections, significantly increases the distance of material distribution from the neutral axis, thereby enhancing the moment of inertia and improving bending stiffness, effectively handling complex bending moment loads. The introduction of an internal hollow cavity reduces overall weight while maintaining load-bearing capacity. Simultaneously, the radial reinforcing ribs between the center point and the vertices of the hexagonal interior form a stable support frame, avoiding the buckling defects of hollow structures and reducing local peak stress through stress diffusion, significantly extending fatigue life. Six circumferentially distributed reinforcing ribs extend continuously along the spring's helical axis, with their extension trajectory consistent with the helix angle of the spring coil, further increasing the bending moment of inertia. Furthermore, the streamlined profile optimizes the contact interface, transforming traditional point contact at corners into line contact, reducing contact stress and frictional wear.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bending spring with an irregular cross-section, characterized in that, include: An irregular cross-section spring (1) has a hexagonal cross-section and a hollow cavity (3) inside. The hollow cavity (3) has a regular hexagonal cross-section and a reinforcing rib (6) is provided between the center point (4) of the hollow cavity (3) and each inner corner vertex (5).

2. The irregular cross-section bending spring according to claim 1, characterized in that, The irregular cross-section spring (1) is provided with a reinforcing rib (2) on the outside, and the reinforcing rib (2) extends along the helical axis of the irregular cross-section spring (1).

3. The irregular cross-section bending spring according to claim 2, characterized in that, The irregular cross-section spring (1) has six reinforcing ribs (2) evenly distributed in the circumferential direction at the middle of each side of the hexagonal cross-section. The reinforcing ribs (2) extend continuously along the direction of the spring helical axis, and the extension trajectory is parallel to the direction of the helical angle of the spring coil.

Images