Silencing drag chain

Abstract

According to the technical scheme, the silencing drag chain comprises a plurality of chain link units, the front chain link unit and the rear chain link unit rotate relatively through hinge joint, and the silencing drag chain is characterized in that each chain link unit comprises a left side wall and a right side wall which are connected in a spaced mode, and positioning grooves are formed in the inner sides of the front ends and the outer sides of the rear ends of the side walls; the positioning grooves in the outer sides of the rear ends of the front chain link units and the positioning grooves in the inner sides of the front ends of the rear chain link units are mutually clamped, positioned and then hinged, mounting holes penetrating through the side walls are formed in the middles of the chain link units, soft noise reduction blocks are mounted in the mounting holes, and the noise reduction blocks protrude out of the surfaces of the positioning grooves in the outer side faces of the rear ends. The positioning groove in the inner side of the front end of the rear chain link unit makes contact with the surface of the protruding noise reduction block on the outer side face of the rear end of the front chain link unit. When the drag chain rotates, noise reduction can be effectively achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drag chain technical field especially is related to a sound -absorbing drag chain. BACKGROUND

[0002] The drag chain, also known as a wire and cable protection drag chain, is a device for binding cables or wires or air pressure pipes and oil pressure pipes to facilitate their rotation and movement, which is generally formed by splicing a plurality of articulated chain links. With the continuous improvement of people's technical requirements, in addition to considering the strength of the chain link during production, its quietness also needs to be considered. For the quietness of the drag chain, since each chain link has a limiting structure for controlling the radius of rotation, the adjacent two chain links are limited by the limiting structure when rotating, thereby limiting the relative rotation within a certain angle. During the rotation process, the limiting structures of the adjacent two chain links will rub and generate noise. SUMMARY

[0003] In view of the above problems, the utility model aims at providing a sound -absorbing drag chain, which can greatly reduce the noise generated by the rotation between two chain links.

[0004] The technical scheme of the utility model is a sound -absorbing drag chain, which comprises a plurality of chain link units, and the front and rear two chain link units are relatively rotated by articulation, characterized in that: the chain link unit comprises two side walls connected in the left and right directions, the inner side of the front end of the side wall and the outer side of the rear end are provided with positioning grooves, the positioning grooves of the rear end outer side of the front chain link unit and the positioning grooves of the front end inner side of the rear chain link unit are mutually clamped and positioned and then articulated, the middle part of the chain link unit is provided with a mounting hole penetrating through the side wall, a soft sound -absorbing block is mounted in the mounting hole, the sound -absorbing block protrudes from the surface of the positioning groove of the rear end outer side, and the positioning groove of the front end inner side of the rear chain link unit contacts the protruding sound -absorbing block surface of the rear end outer side of the front chain link unit.

[0005] Preferably, the sound -absorbing block comprises a mounting part at the front end and a friction part at the rear end, the upper and lower front side regions of the mounting part are of cylindrical structure, the outer side end of the mounting part is a stop end with an outer diameter larger than that of the cylindrical region, the middle part of the cylindrical region is provided with a protruding positioning rib, and the outer side end of the friction part is a plane structure;The mounting hole comprises a stepped hole at the front side for assembling the mounting part and a through hole at the rear side for the friction part to pass through, the inner diameter of the middle part of the stepped hole is smaller than that of the two ends, and the mounting part is inserted into the stepped hole from the outside to the inside, and the positioning rib is inserted into the small diameter section of the middle part of the stepped hole in an interference fit, and then reversely locked to realize the fixed installation of the sound -absorbing block.

[0006] Preferably, the material of the chain link unit is PE, and the material of the sound -absorbing block is soft modified PE.

[0007] The utility model discloses an independent structure's sound -absorbing block is set between the front and rear two chain link units, makes the chain link unit when rotating contact friction sound -absorbing block surface, can reduce the noise that the chain rotates produces greatly. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is the structural schematic diagram of the utility model;

[0009] Figure 2 It is the exploded structural schematic diagram of chain link unit front side wall and sound -absorbing block in the utility model;

[0010] Figure 3 It is Figure 2 The structural schematic diagram of another angle;

[0011] Among them: 1-chain link unit;11-side wall;111-positioning recess;12-mounting hole;121-stair hole;122-through hole;2-sound -absorbing block;21-mounting portion;211-stop end;212-positioning rib;22-friction portion. DETAILED DESCRIPTION

[0012] The utility model will be further explained in detail in combination with the drawings.

[0013] As Figures 1 to 3 Indicated, the utility model provides a sound -absorbing chain, including multiple chain link units 1, and the front and rear two chain link units 1 realize relative rotation through hinged, its characterized in that: chain link unit 1 includes the side wall 11 that is connected to left and right two intervals, the inside and the outside of the front end of side wall 11 rear end are provided with positioning recess 111, and the positioning recess 111 of the rear end outside of front chain link unit 1 and the positioning recess 111 of the front end inside of rear chain link unit 1 are mutually engaged and positioned and then hinged, the middle part of chain link unit 1 is provided with the mounting hole 12 that penetrates side wall 11, the mounting hole 12 is installed with soft sound -absorbing block 2, the sound -absorbing block 2 protrudes from the positioning recess 111 surface of rear end outside, and the positioning recess 111 of the front end inside of rear chain link unit 1 contacts the protruding sound -absorbing block 2 surface of the rear end outside of front chain link unit 1.

[0014] Specifically, the sound-absorbing block 2 comprises a mounting portion 21 at the front end and a friction portion 22 at the rear end, the upper and lower front side areas of the mounting portion 21 are in a cylindrical structure, the outer side end head of the mounting portion 21 is a stop end head 211 with an outer diameter larger than that of the cylindrical area, a protruding positioning rib 212 is arranged in the middle of the cylindrical area, and the outer side end head of the friction portion 22 is in a plane structure; the mounting hole 12 comprises a stepped hole 121 at the front side for assembling the mounting portion 21 and a through hole 122 at the rear side for the friction portion 22 to pass through, the inner diameter of the middle part of the stepped hole 121 is smaller than that of the two ends, and after the mounting portion 21 is inserted into the stepped hole 121 from the outside to the inside, the positioning rib 212 is reversely locked by passing through the small-diameter section of the middle part of the stepped hole 121, so that the sound-absorbing block 2 is fixedly mounted.

[0015] Further, the chain link unit 1 is made of PE, and the sound-absorbing block 2 is made of soft modified PE.

[0016] The sound-absorbing block structure is arranged to reduce the noise generated by the mutual friction between the two chain link units when the drag chain rotates.

[0017] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification, equivalent change or modification made according to the technical principle of the utility model to the above embodiment still belongs to the scope of the technical scheme of the utility model.

Claims

1. A noise-reducing cable chain, comprising multiple link units (1), wherein two link units (1) are hinged together to achieve relative rotation, characterized in that: The link unit (1) includes two sidewalls (11) connected at intervals on the left and right. The sidewalls (11) are provided with positioning grooves (111) on the inner front side and the outer rear side. The positioning groove (111) on the outer rear side of the front link unit (1) and the positioning groove (111) on the inner front side of the rear link unit (1) are engaged and hinged together. The link unit (1) is provided with a mounting hole (12) through the sidewall (11) in the middle. A soft muffler (2) is installed in the mounting hole (12). The muffler (2) protrudes from the surface of the positioning groove (111) on the outer rear side. The positioning groove (111) on the inner front side of the rear link unit (1) contacts the surface of the protruding muffler (2) on the outer rear side of the front link unit (1).

2. The noise-reducing cable chain according to claim 1, characterized in that: The muffler block (2) includes a front mounting part (21) and a rear friction part (22). The upper and lower front areas of the mounting part (21) are cylindrical structures. The outer end of the mounting part (21) is a stop end (211) with an outer diameter larger than that of the cylindrical area. A protruding positioning rib (212) is provided in the middle of the cylindrical area. The outer end of the friction part (22) is a planar structure. The mounting hole (12) includes a stepped hole (121) on the front side for assembling the mounting part (21) and a through hole (122) on the rear side for the friction part (22) to pass through. The inner diameter of the middle part of the stepped hole (121) is smaller than the inner diameter of both ends. After the mounting part (21) is inserted into the stepped hole (121) from the outside to the inside, the positioning rib (212) passes through the small diameter section in the middle of the stepped hole (121) and then locks in the opposite direction to realize the fixed installation of the muffler block (2).

3. The noise-reducing cable chain according to claim 1, characterized in that: The link unit (1) is made of PE, and the sound-absorbing block (2) is made of soft modified PE.

Images