A single-section hydraulic buffer spring

Abstract

This utility model relates to a single-section hydraulic buffer spring in the field of spring technology, comprising: a cylindrical body, wherein an inner deformation annular groove is provided in the axial center of the inner annular surface, the groove depth direction of the inner deformation annular groove facing the radially outward of the cylindrical body; an outer deformation annular groove is provided at each end of the outer annular surface of the cylindrical body, the groove depth direction of the outer deformation annular groove facing the radially inward of the cylindrical body; at least two oil passage holes are uniformly spaced around the circumference in the axial center of the cylindrical body. This utility model, by setting the inner and outer deformation annular grooves, and cooperating with the central hydraulic chamber and oil passage holes, constructs a highly efficient hydraulic damping buffer mechanism. Under axial force, the body produces a coordinated and controllable deformation of "outward expansion in the middle and inward contraction at both ends," forcing hydraulic oil to flow through the oil passage holes to produce a throttling effect, achieving a smooth and gentle buffering effect.

Description

Technical Field

[0001] This utility model relates to the field of spring technology, and in particular to a single-section hydraulic buffer spring. Background Technology

[0002] In the field of automotive shock absorbers, damping elements are widely used to absorb impact energy, dampen vibrations, reduce noise, and protect precision components. To mitigate the energy generated during vehicle bumps, traditional automotive shock absorbers consist of a housing, oil inlet pipe, support rod, and compression spring. However, the compression spring is mostly made of metal, which presents two significant technical drawbacks: First, metal compression springs are relatively heavy, increasing the weight of the components and the entire vehicle; second, metal shock absorber components are prone to hard contact after deformation, causing abnormal noises.

[0003] To address this, we designed a single-section hydraulic buffer spring. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses a single-section hydraulic buffer spring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A single-section hydraulic buffer spring, comprising:

[0007] A cylindrical body has an inner deformation annular groove at the axial center of its inner ring surface, and the groove depth direction of the inner deformation annular groove faces the radial outside of the cylindrical body.

[0008] The cylindrical body has a ring groove with a variable shape at each end of its outer ring surface, and the groove depth direction of the variable shape ring groove is toward the radial interior of the cylindrical body.

[0009] The cylindrical body has at least two oil passage holes evenly spaced around its circumferential center along its axial direction.

[0010] The inner deformation ring groove cooperates with the outer deformation ring groove to guide the middle part to expand radially outward and the two ends to contract radially inward when the cylindrical body is subjected to axial pressure, thereby changing the internal cavity volume of the cylindrical body and generating a damping effect on the flow of hydraulic oil in the cavity.

[0011] Furthermore, the outer annular surface region of the cylindrical body located between the two shape-changing annular grooves is a raised portion, and the outer surface of the raised portion protrudes outward in a smooth arc.

[0012] Furthermore, the cross-sectional shape of the inner deformable annular groove is V-shaped or arc-shaped.

[0013] Furthermore, the side of the variable-shape annular groove near the axial center of the cylindrical body is a plane parallel to the radial surface of the cylindrical body.

[0014] Furthermore, the axis of the oil passage is perpendicular to the axis of the cylindrical body, and its hole shape is a symmetrical structure that is symmetrical about the radial plane of the cylindrical body.

[0015] Furthermore, the inner openings at both ends of the cylindrical body are rounded to form arc-shaped edges.

[0016] Furthermore, the cylindrical body is integrally injection molded from plastic.

[0017] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting internal and external deformation annular grooves, and cooperating with the central hydraulic chamber and oil passage, a highly efficient hydraulic damping buffer mechanism is constructed. Under axial force, the body produces a coordinated and controllable deformation of "outward expansion in the middle and inward contraction at both ends," forcing hydraulic oil to flow through the oil passage to produce a throttling effect, thus achieving a smooth and gentle buffering effect; the raised part design further optimizes the stress distribution and effectively prevents premature local cracking or plastic deformation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the first structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the second structure of this utility model;

[0021] Figure 4 This is a cross-sectional view of the second structure of this utility model.

[0022] In the figure: 1. Cylindrical body; 11. Arc-shaped edge; 2. Inner deformation annular groove; 3. Outer deformation annular groove; 4. Oil passage hole; 5. Raised part. Detailed Implementation

[0023] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0024] Example 1, in conjunction with Appendix Figure 1-2 A single-section hydraulic buffer spring is provided, which is entirely composed of a cylindrical body 1. The cylindrical body 1 is preferably made of plastic with good toughness, wear resistance and oil resistance and manufactured by a one-piece injection molding process, thereby ensuring the integrity of the structure and the consistency of performance.

[0025] An inner deformation groove 2 is provided at the axial center of the inner annular surface (i.e., inner wall) of the cylindrical body 1. The cross-section of the inner deformation groove 2 is V-shaped, with an arc-shaped bottom and the groove depth direction facing the radial outward of the cylindrical body 1. This V-shaped groove design reduces the radial bending stiffness of the material at this location, allowing the central part of the cylindrical body 1 to be precisely guided and undergo uniform radial outward expansion deformation when axially compressed.

[0026] The cylindrical body 1 has a ring of shape-changing grooves 3 at both ends of its outer ring surface (i.e., outer wall). Specifically, the cylindrical body 1 has a ring of shape-changing grooves 3 near both ends of its outer ring surface.

[0027] The cross-section of the external deformation annular groove 3 is approximately triangular, with its side near the axial center of the cylindrical body 1 being a plane parallel to the radial surface of the cylinder. The groove depth of the external deformation annular groove 3 faces the radial interior of the cylindrical body 1. Its function corresponds to that of the internal deformation annular groove 2, guiding the two ends of the cylindrical body 1 to smoothly contract and deform inward when subjected to axial pressure.

[0028] To achieve the buffering function, at least two oil passage holes 4 are evenly provided circumferentially along the central part of the cylindrical body 1. The axes of these oil passage holes 4 are all perpendicular to the axis of the cylindrical body 1, and their hole shapes are symmetrical structures that are symmetrical about the radial plane of the cylindrical body (1). For example, elliptical holes, round holes, rectangular holes, waist-shaped holes, rhomboid holes, etc.

[0029] In this embodiment, there are two oil passage holes 4, and the hole shape is an elliptical hole.

[0030] Furthermore, in order to facilitate installation and avoid stress concentration, the inner openings at both ends of the cylindrical body 1 are rounded to form smooth arc edges 11.

[0031] Furthermore, the outer annular surface region of the cylindrical body 1 located between the two shape-changing annular grooves 3 is designed as a raised portion 5. The wall thickness of this raised portion 5 gradually increases from both ends towards the middle, and its outer surface is a smoothly transitioning arc surface, protruding outwards as a whole. This increases the wall thickness of the cylindrical body 1 in the region between the two shape-changing annular grooves 3, and appropriately makes the outer diameter of this region larger than the outer diameter of the cylindrical body 1 in the region outside the shape-changing annular grooves 3, thereby enabling the buffer spring to effectively bear greater forces.

[0032] Working Principle: When the buffer spring is subjected to axial pressure F, its interior deforms: the middle part expands outward under the guidance of the inner deformation ring groove 2, while the two ends contract inward under the guidance of the outer deformation ring groove 3. This coordinated deformation causes the volume of the hydraulic chamber to decrease, forcing the hydraulic oil in the chamber to be discharged outward through the oil passage 4. Due to the size limitation of the oil passage 4, a throttling damping effect is generated when the hydraulic oil is discharged, thereby achieving buffering and energy absorption. When the pressure is removed, the elastic restoring force of the material itself causes the structure to spring back, and the external oil flows back through the oil passage 4, preparing for the next buffering operation.

[0033] Example 2, in conjunction with Appendix Figure 3-4 A single-section hydraulic buffer spring differs from Embodiment 1 in that the cross-section of the inner deformation ring groove 2 is arc-shaped. Compared to a V-shaped groove, the arc-shaped groove can further reduce stress concentration, making the deformation process smoother and gentler.

[0034] The oil passage hole 4 can be designed as an oblong hole, and the number can be set to five.

[0035] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A single-joint hydraulic cushion spring, characterized by, include: A cylindrical body (1) has an inner deformation annular groove (2) in the axial middle part of its inner ring surface, and the groove depth direction of the inner deformation annular groove (2) is directed toward the radial outside of the cylindrical body (1). The cylindrical body (1) has a ring of shape-changing groove (3) at both ends of its outer ring surface, and the groove depth direction of the shape-changing groove (3) is directed toward the radial interior of the cylindrical body (1). The cylindrical body (1) has at least two oil passage holes (4) evenly spaced around its circumferential center. The inner deformation ring groove (2) cooperates with the outer deformation ring groove (3) to guide the middle part to expand radially outward and the two ends to contract radially inward when the cylindrical body (1) is axially compressed, thereby changing the inner cavity volume of the cylindrical body (1) and generating a damping effect on the flow of hydraulic oil in the cavity.

2. A single-joint hydraulic cushion spring according to claim 1, characterized in that: The cylindrical body (1) has a raised portion (5) located on the outer ring surface between the two shape-changing annular grooves (3). The outer surface of the raised portion (5) is a smooth arc protruding outward.

3. The single-joint hydraulic cushion spring according to claim 1, wherein: The cross-sectional shape of the inner deformable annular groove (2) is V-shaped or arc-shaped.

4. The single-joint hydraulic cushion spring of claim 1, wherein: The side of the variable-shape annular groove (3) near the axial center of the cylindrical body (1) is a plane parallel to the radial surface of the cylindrical body (1).

5. The single-joint hydraulic cushion spring of claim 1, wherein: The axis of the oil passage (4) is perpendicular to the axis of the cylindrical body (1), and its hole shape is a symmetrical structure that is symmetrical about the radial plane of the cylindrical body (1).

6. A single-joint hydraulic cushion spring according to claim 1, wherein: The inner openings at both ends of the cylindrical body (1) are rounded to form arc-shaped edges (11).

7. A single-joint hydraulic cushion spring according to claim 1, wherein: The cylindrical body (1) is integrally injection molded from plastic.

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