Composite damping sleeve

Abstract

The utility model relates to a composite shock absorption sleeve which comprises an inner-layer shaft sleeve, an outer-layer sheath and a middle shock absorption layer formed between the inner-layer shaft sleeve and the outer-layer sheath in a casting mode, and the inner-layer shaft sleeve, the outer-layer sheath and the middle shock absorption layer are of a fastening integrated connection structure. Inner buckling edges are arranged on the two end faces of the outer-layer sheath, and gaps are reserved between the end parts of the inner buckling edges and the outer surface of the inner-layer shaft sleeve, so that a semi-sealing ring cavity is formed between the inner-layer shaft sleeve and the outer-layer sheath; and an inner hole of the inner-layer shaft sleeve is an external connecting hole of the damping sleeve. The composite damping sleeve is connected with an external part through the inner hole; the outer-layer shield plays a half-surrounding role on the middle damping layer, so that the contact between the middle damping layer and the air is greatly avoided, and the damage of foreign matters to the middle damping layer is avoided; the middle rubber layer is used for transmitting power, protecting the structure and absorbing vibration. By means of the three-layer combination mode, the damping sleeve has the good vibration absorption effect and the good anti-aging performance, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of power transmission in a cleaning system of an agricultural harvesting machine, and specifically relates to a composite vibration-damping sleeve. Background Art

[0002] In the cleaning system of agricultural harvesting machinery, the screen box drive mechanism has a problem: during the power transmission process, the swing arm mechanism provides power to the upper and lower screen boxes, while being subjected to the vibration transmitted back by the upper and lower screen boxes. When the vibration time is long enough or resonance occurs, it will cause deformation / damage of the swing arm mechanism / bearings / fixing parts, causing the cleaning system to work abnormally or be completely damaged.

[0003] To solve the above problems, install a composite shock-absorbing sleeve at the input / output end of the swing arm, see Figure 4 The vibration damping sleeve adopts the structure of inner shaft sleeve and outer cast rubber sleeve. Although it reduces the damage frequency of the screen box drive mechanism, it does not completely solve this problem. As time goes by, the outer rubber sleeve also has problems such as aging and damage. Once the rubber sleeve is damaged, it is bound to cause the drive mechanism to fail. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a composite vibration-damping sleeve with good vibration absorption effect, good anti-aging performance and long service life.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] A composite vibration-damping sleeve comprises an inner sleeve, an outer sleeve and an intermediate vibration-damping layer cast between the inner sleeve and the outer sleeve, wherein the inner sleeve, the outer sleeve and the intermediate vibration-damping layer are a tightly integrated connection structure; both end surfaces of the outer sleeve are provided with inner buckled edges, and a gap is left between the end of the inner buckled edge and the outer surface of the inner sleeve, so that a semi-sealed annular cavity is formed between the inner sleeve and the outer sleeve; the inner hole of the inner sleeve is the external connection hole of the vibration-damping sleeve.

[0007] Furthermore, the inner sleeve and the outer sheath are made of precision drawn tubes, and the middle vibration damping layer is made of polyurethane rubber.

[0008] Moreover, the thickness of the middle vibration damping layer is 1.5 to 20 mm.

[0009] Moreover, the inner sleeve, outer sleeve and intermediate vibration-damping layer are arranged in a central position along the axial direction; the length of the inner sleeve is greater than that of the outer sleeve, and the length of the intermediate vibration-damping layer is less than the distance between the inner side surfaces of the inner buckled edges at both ends of the outer sleeve, so that there are gaps between the two ends of the intermediate vibration-damping layer and the two inner buckled edges of the outer sleeve.

[0010] The advantages and positive effects of the utility model are:

[0011] This composite vibration damping sleeve adopts a three-layer fastening integrated structure of an outer sleeve, an outer jacket and an intermediate vibration damping layer. The inner sleeve is a skeleton and is connected to the outer component through an inner hole; the outer jacket plays a semi-enclosed role on the intermediate vibration damping, greatly avoiding the contact between the intermediate vibration damping layer and the air, and avoiding the damage of the intermediate vibration damping layer by foreign objects; the intermediate rubber layer is used to transmit power, protect the structure and absorb vibration. Through the combination of the above three layers, the vibration damping sleeve has a better vibration absorption effect, better anti-aging performance, and a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the utility model;

[0013] Figure 2 It is the appearance diagram of the utility model;

[0014] Figure 3 It is a reference diagram of the use state of the utility model;

[0015] Figure 4 It is a cross-sectional view of an existing vibration damping sleeve. DETAILED DESCRIPTION

[0016] The structure of the utility model is further described below with reference to the accompanying drawings and through embodiments. It should be noted that the embodiments are descriptive rather than restrictive.

[0017] A composite vibration damping sleeve 1, see 1- Figure 3 , including an inner sleeve 1.1, an outer sheath 1.3 and an intermediate vibration-damping layer 1.2 cast between the inner sleeve and the outer sheath, wherein the intermediate vibration-damping layer is made of flexible material.

[0018] The inner sleeve is made of a precision-drawn tube, and the inner hole is used to install fastening bolts and realize hinged connection with other connecting parts of the driving mechanism. The middle layer is a vibration-damping layer, which is made of but not limited to polyurethane rubber. The specific thickness of the rubber layer is determined according to the driving requirements of different positions, and the thickness is generally 1.5 to 20 mm. The outer sheath is made of a precision-drawn tube with a special structure. Both end surfaces of the outer sheath are provided with inner buckle edges 1.3.1. A certain gap 1.4 is left between the end of the inner buckle edge and the outer surface of the inner sleeve, so that the annular space formed between the outer ring surface of the inner sleeve and the inner ring surface of the outer sheath is in a semi-sealed state.

[0019] The inner sleeve, outer sleeve and middle vibration-damping layer are arranged in the center along the axial direction, the length of the inner sleeve is greater than the length of the outer sleeve, and the length of the middle vibration-damping layer is less than the distance between the inner side surfaces of the inner buckle edges at both ends of the outer sleeve, so that a certain gap is left between the two ends of the middle vibration-damping layer and the two inner buckle edges of the outer sleeve, and the size of the gap is 2 to 20 mm. The gap is used to adapt to the deformation of the vibration-damping sleeve of this structure during application.

[0020] The vibration damping sleeve is cast in one piece, and the inner sleeve, middle rubber layer and outer sleeve are fastened and cannot move relative to each other. The inner sleeve is the skeleton of the vibration damping sleeve and is the inner contact surface; the outer shield is the outer contact surface of the vibration damping sleeve and is a protective part of the rubber layer. The middle rubber layer is used to transmit power, protect the structure and absorb vibration. The inward buckled structure at both ends of the outer sleeve not only reduces the area of ​​the middle rubber layer in contact with the air, but also prevents foreign matter from entering the interior of the vibration damping sleeve to damage the rubber layer, thereby greatly reducing the aging and damage of the rubber layer.

[0021] Figure 3 This is a schematic diagram of the use of this composite shock-absorbing sleeve. This composite shock-absorbing sleeve is used for cleaning drive mechanisms, as shown in the figure, the power input pulley 2 receives the power transmitted from the upper mechanism; the driving arm 3, one end of which is equipped with an eccentric bearing and is installed on the same axis as the input pulley, and the other end is equipped with this composite shock-absorbing sleeve 1; the outer side of this composite shock-absorbing sleeve is connected to the driving arm, and the inner side is connected to the swing arm with bolts; 4 is a swing arm, with a composite shock-absorbing sleeve 1 installed on the upper end and a composite shock-absorbing sleeve 1 installed on the lower end, and the middle hole is the connection position, which is fixed by bolts to achieve forward and backward swinging.

[0022] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A composite shock-absorbing sleeve, characterized in that: It includes an inner sleeve, an outer sleeve and an intermediate shock-absorbing layer cast between the inner sleeve and the outer sleeve, wherein the inner sleeve, the outer sleeve and the intermediate shock-absorbing layer are a tightly integrated connection structure; both end surfaces of the outer sleeve are provided with inner buckled edges, and a gap is left between the end of the inner buckled edge and the outer surface of the inner sleeve, so that a semi-sealed ring cavity is formed between the inner sleeve and the outer sleeve; the inner hole of the inner sleeve is the external connection hole of the shock-absorbing sleeve.

2. The composite shock-absorbing sleeve according to claim 1, characterized in that: The inner sleeve and the outer sheath are made of precision drawn tubes, and the middle shock-absorbing layer is made of polyurethane rubber.

3. The composite shock-absorbing sleeve according to claim 1, characterized in that: The thickness of the middle shock-absorbing layer ranges from 1.5 to 20 mm.

4. The composite shock-absorbing sleeve according to claim 1, characterized in that: The inner sleeve, outer sleeve and middle shock-absorbing layer are arranged in parallel along the axial direction; the length of the inner sleeve is greater than that of the outer sleeve, and the length of the middle shock-absorbing layer is less than the distance between the inner side surfaces of the inner buckle edges at both ends of the outer sleeve, so that there are gaps between the two ends of the middle shock-absorbing layer and the two inner buckle edges of the outer sleeve.

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