CN-224201017-U - Thermal shrinkage film damping spring sleeve

Abstract

The utility model relates to the technical field of shock absorbers, in particular to a heat-shrinkable film shock-absorbing spring sleeve which mainly solves the problems of poor running smoothness and friction sound generation of the shock absorbers in the prior art and comprises a spring and a heat-shrinkable film sleeve sleeved on the spring, the inner diameter of the heat-shrinkable film sleeve is 20-32 mm, the thickness dimension of the heat-shrinkable film sleeve is 0.1-0.3 mm, the shrinkage rate of the heat-shrinkable film sleeve is 0.5, and the ratio of the axial length dimension of the spring to the axial length dimension of the heat-shrinkable film sleeve is 3-5:1.

Inventors

• WU JINZHONG

Assignees

• 泉州市博汉机械股份有限公司

Dates

Publication Date

20260505

Application Date

20250424

Claims (4)

1. 1. The heat-shrinkable film damping spring sleeve is characterized by comprising a spring and a heat-shrinkable film sleeve sleeved on the spring, wherein the inner diameter of the heat-shrinkable film sleeve is 20-32 mm, the thickness dimension of the heat-shrinkable film sleeve is 0.1-0.3 mm, the shrinkage rate of the heat-shrinkable film sleeve is 0.5, the ratio of the axial length dimension of the spring to the axial length dimension of the heat-shrinkable film sleeve is 3-5:1, the inner surface of the heat-shrinkable film sleeve is provided with micro grooves distributed in a staggered mode, the depth of each groove is 0.02-0.05 mm, and the area ratio is 15% -25%.
2. 2. The heat-shrinkable film damping spring sleeve of claim 1, wherein the inner diameter of the heat-shrinkable film sleeve is 28mm.
3. 3. The heat-shrinkable film damping spring sleeve of claim 1, wherein the thickness dimension of the heat-shrinkable film sleeve is 0.2mm.
4. 4. The heat-shrinkable film damping spring sleeve according to any one of claims 1 to 3, wherein annular protrusions are arranged at two axial ends of the heat-shrinkable film sleeve, the heights of the protrusions are 0.2 mm-0.5 mm, and the ratio of the spacing between adjacent protrusions to the pitch of the spring is 1:1.2-1.5.

Description

Thermal shrinkage film damping spring sleeve Technical Field The utility model relates to the technical field of shock absorbers, in particular to a heat shrinkage film shock absorption spring sleeve. Background The shock absorber is mainly used for inhibiting vibration and impact from the road surface when the spring rebounds after absorbing the vibration. While the shock absorbing spring can filter the shock of road surface when passing over uneven road surface, the spring itself can reciprocate, and the shock absorber is used to restrain the spring from jumping. However, in use, the spring is compressed, and the axial middle of the spring tends to bulge radially outward, resulting in a reduction in the operational smoothness of the damper and the generation of a frictional sound. Disclosure of utility model Therefore, in order to solve the problems, the utility model provides a heat shrinkage film damping spring sleeve, which mainly solves the problems of poor running smoothness and friction sound generation of a damper in the prior art. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model provides a pyrocondensation membrane damping spring housing, includes the spring and overlaps the pyrocondensation membrane cover of locating on the spring, the internal diameter of pyrocondensation membrane cover is 20mm ~32mm, the thickness size of pyrocondensation membrane cover is 0.1mm ~0.3mm, the shrinkage factor of pyrocondensation membrane cover is 0.5, the axial length size of spring is 3~5:1 with the axial length size ratio of pyrocondensation membrane cover. Further, the inner diameter of the heat-shrinkable film sleeve is 28mm. Further, the thickness dimension of the heat shrinkage film sleeve is 0.2mm. Further, annular protrusions are arranged at two axial ends of the heat-shrinkable film sleeve, the heights of the protrusions are 0.2 mm-0.5 mm, and the ratio of the adjacent protrusion spacing to the spring pitch is 1:1.2-1.5. Further, the inner surface of the heat-shrinkable film sleeve is provided with staggered micro grooves, the depth of the grooves is 0.02-0.05 mm, and the area ratio is 15% -25%. By adopting the technical scheme, the heat-shrinkable film damping spring sleeve has the beneficial effects that the inner diameter of the heat-shrinkable film sleeve is limited to be matched with the outer diameter of the spring, the shrinkage rate of 0.5 is combined, so that the film sleeve forms uniform coating force on a spring body after heat shrinkage, the radial protruding amount of the middle part of the spring during axial compression is effectively restrained from reaching 30% -50%, friction abnormal sound caused by deformation of the spring is avoided, the thickness of the heat-shrinkable film sleeve with the thickness of 0.1-0.3 mm is reduced, the structural strength is ensured, meanwhile, the friction resistance between the spring and the heat-shrinkable film sleeve during reciprocating motion is reduced, the operation smoothness of a damper is improved by more than 20%, the axial length ratio of the spring to the heat-shrinkable film sleeve is 3-5:1, the effective constraint length ratio of the spring is ensured to be more than or equal to 80%, the concentration of local stress is avoided, and the heat-shrinkable film sleeve forms physical engagement with a thread clearance of the spring during heating shrinkage process without an additional adhesive, so that stable assembly can be realized. Drawings FIG. 1 is a schematic perspective view of an embodiment of the present utility model; Fig. 2 is a schematic structural view of the heat shrink film sleeve in an expanded state according to an embodiment of the present utility model. Detailed Description The utility model will now be further described with reference to the drawings and detailed description. The embodiment of the utility model comprises the following steps: embodiment one: Referring to FIG. 1, a heat shrinkage film damping spring sleeve comprises a spring 1 and a heat shrinkage film sleeve 2 sleeved on the spring 1, wherein the inner diameter of the heat shrinkage film sleeve 2 is 20 mm-32 mm, preferably, the inner diameter of the heat shrinkage film sleeve 2 is 28mm, the thickness dimension of the heat shrinkage film sleeve 2 is 0.1 mm-0.3 mm, preferably, the thickness dimension of the heat shrinkage film sleeve 2 is 0.2mm, the shrinkage ratio of the heat shrinkage film sleeve 2 is 0.5, and the ratio of the axial length dimension of the spring 1 to the axial length dimension of the heat shrinkage film sleeve 2 is 3-5:1, preferably 4:1. In the embodiment, the heat shrinkage film sleeve 2 is an EVA transparent heat shrinkage film tube, and when in use, the heat shrinkage film sleeve 2 is sleeved on the spring 1, and then the heat shrinkage film sleeve is heated by a hot air gun at the set temperature of 120 ℃ so as to shrink and cover the spring 1. The heat-shrinkable