Heat shrinkage film damping spring sleeve

Abstract

The utility model relates to the technical field of shock absorbers, in particular to a thermal shrinkage film damping spring sleeve, which mainly solves the problems that the shock absorber in the prior art is poor in operation smoothness and generates friction sound, and comprises a spring and a thermal shrinkage film sleeve sleeved on the spring, the inner diameter of the thermal shrinkage film sleeve is 20mm-32mm, the thickness of the thermal shrinkage film sleeve is 0.1 mm-0.3 mm, and the inner diameter of the thermal shrinkage film sleeve is 20mm-32mm. The shrinkage rate of the thermal shrinkage film sleeve is 0.5, and the ratio of the axial length of the spring to the axial length of the thermal shrinkage film sleeve is (3-5): 1.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, and in particular to a heat-shrinkable film shock-absorbing spring sleeve. Background Technology

[0002] Shock absorbers are mainly used to suppress the oscillations caused by the rebound of the spring after absorbing shock and the impact from the road surface. When driving over uneven roads, although the shock-absorbing spring can filter the vibration of the road surface, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this spring bounce.

[0003] However, when the spring is compressed during use, the central part of the spring tends to bulge outward radially, which reduces the smoothness of the shock absorber's operation and produces friction noise. Utility Model Content

[0004] Therefore, in view of the above problems, this utility model provides a heat-shrinkable film shock-absorbing spring sleeve, which mainly solves the problems of poor smoothness of operation and friction noise of shock absorbers in the prior art.

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

[0006] A heat-shrinkable film shock-absorbing spring sleeve includes a spring and a heat-shrinkable film sleeve sleeved on the spring. The inner diameter of the heat-shrinkable film sleeve is 20mm to 32mm, the thickness of the heat-shrinkable film sleeve is 0.1mm to 0.3mm, the shrinkage rate of the heat-shrinkable film sleeve is 0.5, and the ratio of the axial length of the spring to the axial length of the heat-shrinkable film sleeve is 3 to 5:1.

[0007] Furthermore, the inner diameter of the heat-shrinkable film sleeve is 28mm.

[0008] Furthermore, the thickness of the heat shrink film sleeve is 0.2 mm.

[0009] Furthermore, the heat-shrinkable film sleeve has annular protrusions at both axial ends, with a protrusion height of 0.2mm to 0.5mm and a ratio of the distance between adjacent protrusions to the spring pitch of 1:1.2 to 1.5.

[0010] Furthermore, the inner surface of the heat-shrinkable film sleeve is provided with staggered microgrooves, the groove depth is 0.02mm to 0.05mm, and the area ratio is 15% to 25%.

[0011] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This heat-shrinkable film damping spring sleeve, by limiting the inner diameter of the heat-shrinkable film sleeve to match the outer diameter of the spring, combined with a shrinkage rate of 0.5, enables the film sleeve to form a uniform covering force on the spring body after heat shrinkage, effectively suppressing the radial protrusion of the middle part of the spring by 30% to 50% during axial compression, and avoiding frictional noise caused by spring deformation; furthermore, the thickness of the heat-shrinkable film sleeve of 0.1 to 0.3 mm, while ensuring structural strength, reduces the frictional resistance between the spring and the heat-shrinkable film sleeve during reciprocating motion, improving the smoothness of the shock absorber operation by more than 20%; the axial length ratio of the spring to the heat-shrinkable film sleeve of 3 to 5:1 accurately covers the main area of ​​spring compression deformation, reducing material usage while ensuring that the effective constraint length of the spring accounts for ≥80%, avoiding local stress concentration; the coordinated design of the shrinkage rate and thickness parameters enables the heat-shrinkable film sleeve to form a physical engagement with the spring thread gap during the heating and shrinking process, achieving stable assembly without additional adhesives. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the heat shrink film sleeve in the unfolded state in an embodiment of this utility model. Detailed Implementation

[0014] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0015] The embodiment of this utility model is as follows:

[0016] Example 1:

[0017] refer to Figure 1 As shown, a heat-shrinkable film shock-absorbing spring sleeve includes a spring 1 and a heat-shrinkable film sleeve 2 sleeved on the spring 1. The inner diameter of the heat-shrinkable film sleeve 2 is 20mm to 32mm, preferably 28mm. The thickness of the heat-shrinkable film sleeve 2 is 0.1mm to 0.3mm, preferably 0.2mm. The shrinkage rate of the heat-shrinkable film sleeve 2 is 0.5. The ratio of the axial length of the spring 1 to the axial length of the heat-shrinkable film sleeve 2 is 3 to 5:1, preferably 4:1.

[0018] In this embodiment, the heat shrink film sleeve 2 is an EVA transparent heat shrink film tube; in use, the heat shrink film sleeve 2 is placed on the spring 1, and then the heat shrink film sleeve is heated by setting the temperature to 120°C with a hot air gun, so that it shrinks and covers the spring 1.

[0019] This heat-shrinkable film damping spring sleeve, by matching the inner diameter of the heat-shrinkable film sleeve 2 with the outer diameter of the spring 1, and combining a shrinkage rate of 0.5, allows the heat-shrinkable film sleeve 2 to form a uniform covering force on the spring 1 after heat shrinking. This effectively suppresses the radial protrusion of the center of the spring 1 by 30% to 50% during axial compression, avoiding frictional noise caused by spring 1 deformation. Furthermore, the thickness of the heat-shrinkable film sleeve 2, 0.1 to 0.3 mm, ensures structural strength while reducing the frictional resistance between the spring 1 and the heat-shrinkable film sleeve 2 during reciprocating motion, improving the smoothness of the damper's operation by more than 20%. The axial length ratio of the spring 1 to the heat-shrinkable film sleeve 2, 3 to 5:1, precisely covers the main area of ​​spring 1's compression deformation, reducing material usage while ensuring that the effective constraint length of the spring 1 accounts for ≥80%, avoiding local stress concentration. The coordinated design of the shrinkage rate and thickness parameters allows the heat-shrinkable film sleeve to form a physical engagement with the threaded gap of the spring 1 during the heating and shrinking process, achieving stable assembly without the need for additional adhesives.

[0020] Example 2:

[0021] refer to Figure 2 As shown, this embodiment two is a further improvement on the basis of embodiment one. The technical feature that distinguishes it from embodiment one is that: the heat shrink film sleeve 2 has annular protrusions 3 at both ends of its axial direction. The height of the protrusions 3 is 0.2mm to 0.5mm, preferably 0.3mm. The ratio of the distance between adjacent protrusions 3 to the pitch of the spring 1 is 1:1.2 to 1.5. Physical limiting prevents the axial displacement of the heat shrink film sleeve 2 from causing local stress concentration.

[0022] Furthermore, the inner surface of the heat-shrinkable film sleeve 2 is provided with staggered micro-grooves 4, the depth of which is 0.02mm to 0.05mm, preferably 0.03mm, and the area ratio is 15% to 25%, preferably 18%. The oil storage structure further reduces the frictional resistance of the reciprocating motion of the spring 1.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A heat-shrinkable film shock-absorbing spring sleeve, characterized in that: The device includes a spring and a heat-shrinkable film sleeve fitted onto the spring. The inner diameter of the heat-shrinkable film sleeve is 20mm to 32mm, the thickness of the heat-shrinkable film sleeve is 0.1mm to 0.3mm, the shrinkage rate of the heat-shrinkable film sleeve is 0.5, the ratio of the axial length of the spring to the axial length of the heat-shrinkable film sleeve is 3 to 5:1, and the inner surface of the heat-shrinkable film sleeve is provided with staggered micro-grooves, the groove depth is 0.02mm to 0.05mm, and the area ratio is 15% to 25%.

2. The heat-shrinkable film shock-absorbing spring sleeve according to claim 1, characterized in that: The inner diameter of the heat-shrinkable film sleeve is 28mm.

3. The heat-shrinkable film shock-absorbing spring sleeve according to claim 1, characterized in that: The thickness of the heat shrink film sleeve is 0.2mm.

4. The heat-shrinkable film shock-absorbing spring sleeve according to any one of claims 1 to 3, characterized in that: The heat-shrinkable film sleeve has annular protrusions at both axial ends, with a protrusion height of 0.2mm to 0.5mm and a ratio of the distance between adjacent protrusions to the spring pitch of 1:1.2 to 1.5.

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