CN217926832U

CN217926832U - Improved rubber shock-absorbing coupling shaft

Info

Publication number: CN217926832U
Application number: CN202222030921.5U
Authority: CN
Inventors: 江义发; 许呈祥; 黄元敏
Original assignee: Yangzhou Runfa Rubber Plastic Co ltd
Current assignee: Yangzhou Runfa Rubber Plastic Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-11-29
Anticipated expiration: 2032-08-03

Abstract

The utility model relates to an improved generation rubber shock attenuation connection axle in the rubber shock absorber device technical field, rubber shock attenuation connection axle, including dabber, rubber shock absorber layer and overcoat, the dabber middle part is equipped with arc hunch week portion, the overcoat is located the arc hunch week portion's of dabber periphery to rubber shock absorber layer is located the arc hunch week portion between overcoat and dabber, the dabber both ends are equipped with the link, the link is equipped with the connecting hole, the axial of connecting hole is perpendicular with the axial of dabber, the interior circumference of overcoat is the arc of indent, rubber shock absorber layer's both ends are equipped with axial indent arc groove, the layer thickness that rubber shock absorber layer is close to axial both ends is greater than the layer thickness at axial center to the layer thickness is gradually thick in succession from the center to both ends. The utility model discloses a rubber shock attenuation connection axle under the prerequisite that does not change original connection axle overall dimension, to the inboard and dabber peripheral shape of overcoat and institutional advancement, makes the shape structure on rubber layer to improve the fatigue resistance ability of rubber shock absorber layer.

Description

Improved rubber shock-absorbing coupling shaft

Technical Field

The utility model relates to a rubber shock absorber device technical field, in particular to rubber shock attenuation coupling axle.

Background

In the prior art, a rubber damping coupling shaft is shown in fig. 1, and includes a core shaft 1 and an outer sleeve 2 made of high-strength steel, a rubber damping layer is vulcanized between the core shaft 1 and the outer sleeve 2, and connecting holes are formed at two ends of the core shaft. When the damping coupling shaft is used, the rubber damping layer is gradually used for removing elasticity after high-frequency repeated extrusion, so that the coupling shaft loses damping performance until failure. However, the coupling shaft of this structure is limited in installation space and size, and the method of delaying the failure time by increasing the thickness of the rubber layer and the material properties of the rubber layer is limited, so that further improvement in structure is required to prolong the service life of the rubber layer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that the rubber layer elasticity that exists of rubber shock attenuation connection axle became invalid easily among the prior art, provide a modified rubber shock attenuation connection axle, through the structure that improves rubber shock absorber layer to improve connection axle damping performance and delay life.

The utility model aims at realizing the purpose, an improved rubber damping coupling shaft comprises a mandrel, a rubber damping layer and an outer sleeve, wherein the middle part of the mandrel is provided with an arc-shaped arching peripheral part, the outer sleeve is positioned at the periphery of the arc-shaped arching peripheral part of the mandrel, the rubber damping layer is positioned between the outer sleeve and the arc-shaped arching peripheral part of the mandrel, connecting ends are arranged at two ends of the mandrel, the connecting ends are provided with connecting holes, and the axial direction of the connecting holes is vertical to the axial direction of the mandrel; the rubber shock absorption sleeve is characterized in that the inner periphery of the outer sleeve is in an inwards concave arc shape, axial inwards concave arc grooves are formed in two ends of the rubber shock absorption layer, the layer thickness of the rubber shock absorption layer close to the two axial ends is larger than that of the middle axial center, and the layer thickness is gradually increased from the center to the two ends.

The utility model discloses a rubber shock attenuation connection axle, under the prerequisite that does not change original connection axle overall dimension, through inboard and dabber periphery shape and institutional advancement to the overcoat, make the rubber layer be greater than middle thickness along the thickness at axial both ends, at rubber layer vibrations extrusion in-process, the extrusion deformation range at dabber and overcoat axial runout in-process both ends is greater than middle deformation range to alleviate the elastic fatigue time limit on both ends rubber layer.

As a further improvement of the utility model, a plurality of grooves are respectively arranged on the periphery of the mandrel and the inner periphery of the outer sleeve at intervals. The grooves are arranged on the two sides of the rubber layer in the thickness direction, so that the strength and the elastic fatigue resistance of the rubber layer are further improved.

Further, the grooves on the outer periphery of the mandrel and the inner periphery of the outer sleeve are annular grooves and are arranged in a staggered mode in the axial direction.

Furthermore, the grooves on the outer periphery of the mandrel are annular grooves arranged at intervals, and the grooves on the inner periphery of the outer sleeve are axial grooves arranged at intervals along the circumferential direction.

Drawings

Fig. 1 is a schematic structural view of an improved rubber shock-absorbing coupling shaft in the prior art.

Fig. 2 is a schematic structural view of an embodiment 1 of the improved rubber damping coupling shaft of the present invention.

Fig. 3 is a schematic structural view (a cross-sectional direction perpendicular to the axial direction of the mandrel) of embodiment 2 of the improved rubber shock-absorbing coupling shaft according to the present invention.

1. A mandrel; 101 a connecting hole; 102 102' grooves; 2, coating a jacket; 201,201' grooves; 3 rubber shock-absorbing layer.

Detailed Description

Example 1

As shown in fig. 2, for the improved rubber damping coupling shaft of the present invention, including a mandrel 1, a rubber damping layer 3 and an outer sleeve 2, the middle of the mandrel 1 is provided with an arc-shaped arching peripheral portion, the outer sleeve 2 is located at the periphery of the arc-shaped arching peripheral portion of the mandrel 1, and the rubber damping layer 3 is located between the arc-shaped arching peripheral portions of the outer sleeve 2 and the mandrel 1, both ends of the mandrel 1 are provided with connecting ends, the connecting ends are provided with connecting holes 101, and the axial direction of the connecting holes 101 is perpendicular to the axial direction of the mandrel; the inner periphery of the outer sleeve 2 is in an inwards concave arc shape, two ends of the rubber shock absorption layer 3 are provided with axial inwards concave arc grooves 301, the layer thickness of the rubber shock absorption layer 3 close to the two axial ends is larger than that of the middle axial center, and the layer thickness is continuously gradually thicker from the center to the two ends.

In order to improve the structure of the rubber layer, a plurality of grooves 102 (201) are respectively arranged on the outer periphery of the mandrel 1 and the inner periphery of the outer sleeve 2 at intervals. Specifically, in the present embodiment, the groove 102 on the outer periphery of the mandrel 1 and the groove 201 on the inner periphery of the outer sleeve 2 are both annular grooves, and are staggered in the axial direction. Thus, the strength and the elastic fatigue resistance of the rubber layer can be further improved by providing the grooves on both sides in the thickness direction of the rubber layer.

According to the rubber damping connecting shaft, on the premise that the overall dimension of the original connecting shaft is not changed, the shapes and the structures of the inner side of the outer sleeve and the periphery of the mandrel are improved, firstly, the thicknesses of two ends of the rubber layer in the axial direction are larger than the thickness of the middle part, in the vibration extrusion process of the rubber layer, the extrusion deformation amplitudes of the two ends are larger than the deformation amplitude of the middle part in the axial jumping process of the mandrel 1 and the outer sleeve 2, and therefore the elastic fatigue time limit of the rubber layers at the two ends is relieved; on the other hand, a plurality of bulges are formed on the inner periphery and the outer periphery of the rubber layer, so that the elastic fatigue resistance of the rubber shock absorption layer 3 is further improved.

Example 2

As shown in fig. 3, the present embodiment differs from embodiment 1 in that the grooves 201 'on the inner periphery of the outer sleeve 2 and the grooves 102' on the outer periphery of the mandrel 1 are axially arranged at intervals in the circumferential direction. Therefore, a plurality of longitudinal bulges are formed on the inner periphery and the outer periphery of the rubber shock absorption layer, and the elastic fatigue resistance of the rubber shock absorption layer can be improved.

Claims

1. An improved rubber damping coupling shaft comprises a mandrel, a rubber damping layer and an outer sleeve, wherein the middle of the mandrel is provided with an arc-shaped arched peripheral part, the outer sleeve is positioned on the periphery of the arc-shaped arched peripheral part of the mandrel, the rubber damping layer is positioned between the outer sleeve and the arc-shaped arched peripheral part of the mandrel, connecting ends are arranged at two ends of the mandrel, connecting holes are formed in the connecting ends, and the axial direction of the connecting holes is perpendicular to the axial direction of the mandrel; the rubber shock absorption sleeve is characterized in that the inner periphery of the outer sleeve is in an inwards concave arc shape, axial inwards concave arc grooves are formed in two ends of the rubber shock absorption layer, the layer thickness of the rubber shock absorption layer close to the two axial ends is larger than that of the middle axial center, and the layer thickness is gradually increased from the center to the two ends.

2. The improved rubber shock absorbing coupling shaft according to claim 1, wherein the outer circumference of the mandrel and the inner circumference of the outer sleeve are provided with a plurality of grooves at intervals.

3. The improved rubber damper coupling shaft according to claim 2, wherein the grooves of the outer periphery of the mandrel and the inner periphery of the outer sleeve are annular grooves and are staggered in the axial direction.

4. The improved rubber damper coupling shaft according to claim 2, wherein said grooves on said outer periphery of said mandrel are spaced annular grooves and said grooves on said inner periphery of said outer sleeve are circumferentially spaced axial grooves.