Improved corrugated pipe dust-free drag chain shell

Abstract

The utility model discloses an improved corrugated pipe dust-free drag chain outer shell which comprises an upper shell body and a lower shell body, buckling edge strips are arranged on the two sides of the outer portion of the upper shell body and the two sides of the outer portion of the lower shell body in the length direction respectively, a platform face is formed at the corrugated top of each corrugated part, and therefore the contact position A between the improved corrugated pipe dust-free drag chain outer shell and a bearing face is in surface contact. The plane contact surface is larger, the fatigue resistance of the contact with the external part is better according to experiments, and the abrasion between the contact surface and the bearing surface is smaller; when a cable is installed in the improved corrugated pipe dust-free drag chain shell, the improved corrugated pipe dust-free drag chain shell is bent under the action of suspension and gravity, so that the adjacent corrugated parts extrude each other, and therefore the cable is prevented from being damaged. The surface contact between the adjacent corrugated parts is more beneficial to the stress stability, and the bending-resistant bearing capacity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drag chains, in particular to an improved bellows dust-free drag chain shell. Background Art

[0002] Drag chains, also known as cable protection drag chains, are devices that bind cables or wires or air and hydraulic pipes to facilitate their rotation and movement. Drag chains are used in reciprocating motion situations and can pull and protect built-in cables, oil pipes, air pipes, water pipes, etc. Drag chains have been widely used in CNC machine tools, electronic equipment, glass machinery, injection molding machine manipulators, handling machinery, plastic machinery, lifting equipment, woodworking machinery, automotive industry, industrial vehicles, metal processing machines, machine tools, casting machinery, port equipment, flat panel display equipment, semiconductor equipment and other industries.

[0003] Plastic drag chains are generally used in automation equipment. The advantage of using plastic drag chains is that they are light in weight and easy to move and operate automation equipment. In order to adapt to operations in clean rooms and vacuum environments, dust-free drag chains, also known as clean room drag chains, are needed. They are used in clean rooms to bear electrical connection equipment and loads. They have the characteristics of friction resistance, no gas release, no dust accumulation, acid and alkali resistance and aging resistance. They are usually sleeved on the surface of cable air pipes for sealing and dust prevention. Before installation, it is necessary to ensure that the internal cable air pipe cannot be bent, and the radius of the dust-free drag chain cannot be less than the cable diameter.

[0004] like Figure 1 , 2 As shown, the existing dust-free drag chain housing is usually formed by buckling two upper and lower shells. When in use, when the cable air pipe is placed in the drag chain and needs to be closed, the side strips of the two shells need to be quickly buckled together. The buckling of the side strips is generally achieved by a snap-on structure. We found that the corrugated top and corrugated side of each corrugated part in the existing dust-free drag chain housing are both arc structures. In the reciprocating mechanical dust-free hand protection drag chain of clean room automation equipment, the contact position A between the corrugated part and the bearing surface is line contact, which is similar to blade contact and is prone to cutting wear. In addition, the position B where adjacent corrugated parts squeeze each other under the action of gravity is also line contact, which is prone to slipping and has poor force-bearing capacity stability. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an improved bellows dust-free drag chain housing, aiming to solve the technical defects of at least one existing dust-free drag chain in the background technology.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0007] The utility model provides an improved bellows dust-free drag chain housing, comprising an upper shell body and a lower shell body, wherein the outer sides of the upper shell body and the lower shell body are respectively provided with snap-fitting edge strips along the length direction, and the surfaces of the upper shell body and the lower shell body are respectively provided with corrugated parts, and a tubular cavity part is formed in the upper shell body and the lower shell body; the corrugated top of each corrugated part forms a platform surface, so that the contact position A between the improved bellows dust-free drag chain housing and the bearing surface is surface contact.

[0008] Furthermore, the corrugated side portions on both sides of the corrugated portion form a side plane, and the mutually extruded position B between adjacent corrugated portions is also in surface contact.

[0009] Furthermore, the upper shell and the lower shell are buckled together along the length direction to form a U-shaped structure, and the U-shaped structure includes a curved portion, and at least one end of the two ends of the curved portion is provided with a straight portion. Furthermore, the straight portion and the curved portion are formed by the upper shell and the lower shell being buckled together along the length direction, and the opposite ends of the straight portion and the curved portion are respectively provided with fusion ports for connection by melting.

[0010] Specifically, alignment posts and alignment holes are respectively provided between the two interlocking side strips that are in contact with each other, and multiple clips and clip holes are evenly provided between the two interlocking side strips that are in contact with each other along the length direction of the river, the alignment posts enter into the alignment holes, and the clips enter into the clip holes.

[0011] Optionally, the alignment posts and the alignment holes on the two mutually fitted buckling side strips correspond to each other and are arranged in an interlaced manner.

[0012] By adopting the above technical scheme, the improved bellows dust-free drag chain housing of the embodiment of the utility model comprises an upper shell body and a lower shell body. The outer sides of the upper shell body and the lower shell body are respectively provided with snap-fitting edge strips on both sides along the length direction. The corrugated top of each corrugated part forms a platform surface, so that the contact position A between the improved bellows dust-free drag chain housing and the bearing surface is a surface contact, and the plane contact surface is larger. Experiments have shown that the fatigue resistance of the contact with the external part is better, and the wear between the bearing surface is smaller; the corrugated side parts on both sides of the corrugated part form a side plane, and the mutual squeezing position B between adjacent corrugated parts is also a surface contact. When cables are installed in the improved bellows dust-free drag chain housing, the improved bellows dust-free drag chain housing bends due to suspension and under the action of gravity, so that adjacent corrugated parts are squeezed against each other. The surface contact between adjacent corrugated parts is more conducive to force stability and increases the anti-bending bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a main structural diagram of the upper shell of the existing improved bellows dust-free drag chain shell;

[0015] Figure 2 This is the main structural diagram of the existing improved bellows dust-free drag chain housing;

[0016] Figure 3 This is a front view structural diagram of the upper shell of the improved bellows dust-free drag chain housing of the utility model;

[0017] Figure 4 This is a main structural diagram of the improved bellows dust-free drag chain housing of the utility model;

[0018] Figure 5 This is a schematic structural diagram of the improved bellows dust-free drag chain housing of the utility model;

[0019] In the figure, 100-improved bellows dust-free drag chain housing,

[0020] 110-straight portion, 120-curved portion;

[0021] 101 - upper shell, 102 - lower shell, 103 - buckled edge strip, 104 - corrugated part, 1041 - corrugated top, 1042 - corrugated side, 105 - fusion opening. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Example 1

[0024] like Figure 3-5As shown, an embodiment of the utility model provides an improved bellows dust-free drag chain housing 100, comprising an upper shell 101 and a lower shell 102, wherein the outer sides of the upper shell 101 and the lower shell 102 are respectively provided with snap-fitting edge strips 103 along the length direction, and the surfaces of the upper shell 101 and the lower shell 102 are respectively provided with corrugated portions 104, and a tubular cavity portion is formed inside the upper shell 101 and the lower shell 102; the corrugated top 1041 of each corrugated portion 104 forms a platform surface, so that the contact position A between the improved bellows dust-free drag chain housing 100 and the bearing surface is surface contact.

[0025] like Figure 3 , 4 As shown, the corrugated side portions 1042 on both sides of the corrugated portion 104 form a side plane, and the mutually squeezed position B between adjacent corrugated portions 104 is also in surface contact.

[0026] like Figure 3 As shown, the upper shell 101 and the lower shell 102 are buckled together along the length direction to form a U-shaped structure, and the U-shaped structure includes a curved portion 120 and a straight portion 110 disposed at at least one end of the two ends of the curved portion 120. Thus, the drag chain maintains the shape of the cable in a natural state.

[0027] The straight portion 110 and the curved portion 120 are formed by buckling the upper shell 101 and the lower shell 102 along the length direction, and opposite ends of the straight portion 110 and the curved portion 120 are respectively provided with fusion ports 105 for connection by melting.

[0028] Specifically, alignment posts and alignment holes are respectively provided between the two mutually fitting side strips 103, and a plurality of clips and clip holes are evenly provided between the two mutually fitting side strips 103 along the length direction of the river, the alignment posts enter into the alignment holes, and the clips enter into the clip holes.

[0029] Optionally, the alignment posts and the alignment holes on the two mutually fitting buckling side strips 103 correspond to each other and are arranged in an interlaced manner.

[0030] The improved bellows dust-free drag chain housing of the utility model embodiment comprises an upper shell body and a lower shell body. The outer sides of the upper shell body and the lower shell body are respectively provided with snap-fitting edge strips on both sides along the length direction. The corrugated top of each corrugated part forms a platform surface, so that the contact position A between the improved bellows dust-free drag chain housing and the bearing surface is a surface contact, and the plane contact surface is larger. Experiments have shown that the fatigue resistance of the contact with the external part is better, and the wear between the bearing surface is smaller; the corrugated side parts on both sides of the corrugated part form a side plane, and the mutual squeezing position B between adjacent corrugated parts is also a surface contact. When cables are installed in the improved bellows dust-free drag chain housing, the improved bellows dust-free drag chain housing bends due to suspension and under the action of gravity, so that adjacent corrugated parts are squeezed against each other. The surface contact between adjacent corrugated parts is more conducive to force stability and increases the anti-bending bearing capacity.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An improved bellows dust-free drag chain housing, characterized in that: It comprises an upper shell and a lower shell, wherein the outer sides of the upper shell and the lower shell are respectively provided with snap-fitting edge strips along the length direction, and the surfaces of the upper shell and the lower shell are respectively provided with corrugated parts, and a tubular cavity part is formed inside the upper shell and the lower shell; the corrugated top of each corrugated part forms a platform surface, so that the contact position A between the improved bellows dust-free drag chain housing and the bearing surface is surface contact.

2. The improved bellows dust-free drag chain housing according to claim 1, characterized in that: The corrugated side portions on both sides of the corrugated portion form a side plane, and the mutually extruded position B between adjacent corrugated portions is also in surface contact.

3. The improved bellows dust-free drag chain housing according to claim 1, characterized in that: The upper shell and the lower shell are buckled together along the length direction to form a U-shaped structure, and the U-shaped structure includes a curved portion and two ends of the curved portion, at least one of which is provided with a straight portion.

4. The improved bellows dust-free drag chain housing according to claim 3, characterized in that: The straight portion and the curved portion are both formed by buckling the upper shell and the lower shell along the length direction. The opposite ends of the straight portion and the curved portion are respectively provided with fusion ports for connection in a melting manner.

5. The improved bellows dust-free drag chain housing according to claim 1, characterized in that: Alignment posts and alignment holes are respectively arranged between the two mutually fitting side strips, and a plurality of clips and clip holes are evenly arranged between the two mutually fitting side strips along the length direction of the river, the alignment posts enter into the alignment holes, and the clips enter into the clip holes.

6. The improved bellows dust-free drag chain housing according to claim 5, characterized in that: The alignment posts and alignment holes on the two mutually fitting buckling side strips correspond to each other and are arranged in an interlaced manner.

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