A wear-resistant drag chain
By using a roller to perform rolling friction when the upper sagging part of the drag chain is in contact with the lower straight part, the sliding friction damage caused by the drag chain is solved, and the production cost is reduced.
Patent Information
- Application Number
- CN202421549548.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-07-02
AI Technical Summary
During use, the drag chain is caused by sliding friction due to the contact between the upper sag and the lower straight part, which causes damage to the drag chain itself. At the same time, the use of anti-sagging materials increases the production cost.
An anti-wear drag chain is designed. By providing an anti-wear device on the lower straight part of the drag chain body, including a U-shaped fixing frame, a vertical part, a support frame and a roller, the upper sagging part is prevented from contacting the lower straight part, and the rollers are used to contact to generate rolling friction.
It effectively avoids sliding friction between the upper sagging part of the drag chain and the lower straight part, and prevents frictional damage from the drag chain itself. At the same time, it does not require the use of expensive anti-sagging materials, which reduces the production cost.
Smart Images
Figure CN222702474U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drag chains, in particular to an anti-wear drag chain. Background Art
[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.
[0003] As a mobile carrier of live wires, drag chains have been widely used in various fields of mechanical design. They can ensure movement while greatly preventing the wire harness from being damaged during movement. However, the principle of drag chains determines that its load-bearing capacity is restricted by the material and length. When the wire harness is too long, the movable part of the upper part of the drag chain will inevitably sag, causing the upper part of the drag chain to contact with the lower straight part to produce sliding friction, resulting in friction on the drag chain itself, thereby damaging the drag chain. If anti-drooping materials are used to manufacture drag chains, the production cost of the drag chain will be greatly increased. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide an anti-wear drag chain, which can avoid the sliding friction caused by the upper part of the drag chain contacting the lower straight part due to the sagging when the drag chain is in use, thereby avoiding friction damage to the drag chain itself, and has low production cost.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An embodiment of the utility model provides an anti-wear drag chain, including a drag chain body, an anti-wear device is provided at a set position of the straight part of the lower part of the drag chain body, the anti-wear device includes a fixing frame, the fixing frame adopts a U-shaped structure, including a horizontal part and vertical parts respectively arranged at both ends of the horizontal part, the horizontal part is fixed to the bottom surface of the straight part of the drag chain body, a support frame located above the straight part of the drag chain body is detachably provided between the two vertical parts, the vertical part and the support frame are both provided with a tightening member abutting against the straight part of the drag chain, the top of the horizontal part is rotatably connected to a roller, and the roller is located on the inner side of the vertical part.
[0007] Optionally, the tightening members on the two vertical portions are coaxially arranged facing each other.
[0008] Optionally, two ends of the support frame are provided with tightening members.
[0009] Optionally, the tightening member is a threaded tightening member, the threaded tightening member connected to the horizontal part is vertically threadedly connected to the horizontal part, and the threaded tightening member connected to the support frame is vertically threadedly connected to the support frame.
[0010] Optionally, the distance between the two vertical portions is greater than the width of the drag chain body.
[0011] Optionally, the roller is a nylon roller.
[0012] Optionally, the roller is rotatably connected to the vertical portion via a rotating shaft assembly, wherein the rotating shaft assembly includes a rotating shaft, which is vertically fixedly connected to the vertical portion, and the rotating shaft is rotatably connected to a roller located on the inner side of the vertical portion.
[0013] Optionally, the rotating shaft passes through the vertical part and is provided with a stopper, which contacts the inner side surface of the vertical part. The rotating shaft section on the inner side of the stopper is rotatably connected to a roller. The shaft section extending to the outside of the vertical part is an externally threaded shaft and is threadedly connected to a fixing nut. The fixing nut is pressed on the outer side surface of the vertical part to fix the rotating shaft to the vertical part.
[0014] Optionally, a flat washer and a spring washer are provided between the fixing nut and the outer side surface of the vertical portion, the spring washer is in contact with the fixing nut, and the flat washer is in contact with the outer side surface of the vertical portion.
[0015] Optionally, the horizontal portion is provided with a fixing hole, and the horizontal portion is fixedly connected to the bottom surface of the straight portion of the drag chain body through the fixing hole and a threaded fastener.
[0016] The beneficial effects of the above utility model are as follows:
[0017] 1. In the wear-resistant drag chain of the utility model, the straight part of the drag chain body is provided with an anti-wear device, and the anti-wear device has a roller arranged above the drag chain body. When the upper part of the drag chain body sags, it can contact the roller but not the straight part of the lower part of the drag chain body. Rolling friction but not sliding friction is generated between the drooping part of the upper part of the drag chain body and the roller, thereby avoiding friction damage to the drag chain body.
[0018] 2. The wear-resistant drag chain of the utility model has a horizontal portion and a bottom surface of a straight portion of the lower portion of the drag chain body fixedly connected via fixing holes and threaded fasteners, and a tightening member abuts against the straight portion of the drag chain body. The wear-resistant device can be directly installed on the existing drag chain without the need to use expensive anti-drooping materials such as chromium, and the processing and manufacturing cost is low.
[0019] 3. In the wear-resistant drag chain of the present invention, both the vertical portion and the support frame are provided with a tightening piece, which abuts against the drag chain body, thereby ensuring the firmness and reliability of the fixation between the wear-resistant device and the drag chain body. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.
[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the anti-wear device of Example 1 of the utility model;
[0023] Figure 3 This is a front view of the anti-wear device of Example 1 of the utility model;
[0024] Figure 4 This is a top view of the anti-wear device of Example 1 of the utility model;
[0025] Among them, 1. fixed frame, 1-1. horizontal part, 1-2. vertical part, 1-3. fixing hole, 1-4. connecting hole, 2. support frame, 2-1. bottom plate, 2-2. side plate, 3. roller, 4. fixing nut, 5. flat washer, 6. spring washer, 7. tightening bolt, 8. drag chain body, 9. rotating shaft, 10. stopper. DETAILED DESCRIPTION
[0026] Example 1
[0027] This embodiment provides an anti-wear drag chain, such as Figure 1 As shown, the drag chain body 8 includes a drag chain body 8. The drag chain body 8 can adopt the existing drag chain structure, which is an annular structure, including an upper part and a lower part. The lower part is used to cooperate with the foundation, the lower part has a straight part, and the upper part is a moving part. When the upper part is long, it is easy to sag and the sag part contacts with the straight part of the lower part, thereby generating sliding friction and causing friction damage to the drag chain body. Therefore, in this embodiment, an anti-wear device is provided at a set position of the straight part of the lower part of the drag chain body. The anti-wear device can contact with the sag part of the upper part of the drag chain body to avoid wear caused by sliding friction between the sag part of the upper part and the straight part of the lower part of the drag chain body.
[0028] The setting position can be set according to actual needs and will not be described in detail here.
[0029] like Figure 2-Figure 4 As shown, the anti-wear device includes a fixing frame 1, which adopts a U-shaped structure, including a horizontal portion 1-1 and vertical portions 1-2 vertically fixed at both ends of the horizontal portion, and the distance between the two vertical portions 1-2 is greater than the width of the drag chain body 8, which facilitates the installation of the fixing frame 1. Preferably, the difference between the distance between the two vertical portions 1-2 and the width of the drag chain body 8 is 2-4mm, so there is a gap of 1mm-2mm between the vertical portion 1-2 and the side of the drag chain body 8 on the same side.
[0030] The horizontal portion 1-1 is provided with a plurality of fixing holes 1-3, the top surface of the horizontal portion 1-1 is fitted with the bottom surface of the lower straight portion of the drag chain body 8, and is fixedly connected to the lower straight portion of the drag chain body through the fixing holes 1-3 and threaded fasteners.
[0031] Preferably, two fixing holes 1 - 3 are provided, respectively disposed at two ends of the horizontal portion 1 - 1 .
[0032] Preferably, the threaded fasteners are bolts that match the fixing holes, and correspondingly, the lower straight portion of the drag chain body 8 is provided with threaded holes that match the bolts.
[0033] A support frame 2 is provided between the two vertical portions 1-2. The support frame 2 is located above the lower straight portion of the drag chain body. The support frame 2 includes a rectangular bottom plate 2-1. Side panels 2-2 are provided at the four edges of the bottom plate 2-1. The support frame 2 is arranged parallel to the straight portion of the drag chain body 8. The side panel 2-2 at one end of the support frame 2 is detachably fixedly connected to the vertical portion 1-2 on the same side, and the side panel 2-2 at the other end of the support frame 2 is detachably fixedly connected to the vertical portion 1-2 on the other side.
[0034] Specifically, the vertical portion 1-2 is provided with a connecting hole 1-4, and the side plate 2-2 of the support frame 2 is provided with a threaded hole. The vertical portion 1-2 and the side plate 2-2 of the support frame 2 are detachably fixedly connected through the connecting hole 1-4, the threaded hole and the fixing bolts.
[0035] The two vertical parts 1 - 2 are both provided with a tightening piece, which abuts against the side of the lower straight part of the drag chain body 8 and tightens the side of the straight part, further improving the connection firmness between the fixing frame 1 and the drag chain body 8 .
[0036] In this embodiment, the tightening member is a threaded tightening member. Preferably, the threaded tightening member is a tightening bolt 7, which is vertically threadedly connected to the vertical portion 1-2, and its rod abuts against the side of the straight portion of the drag chain body 8.
[0037] In the support frame 2 , two ends of the bottom plate 2 - 1 are also provided with tightening members, which abut against the upper surface of the straight portion of the drag chain body 8 to improve the firmness of the connection of the support frame 2 .
[0038] The tightening member on the bottom plate 2 - 1 is a threaded tightening member, preferably, a tightening bolt 7 is used, and the tightening bolt 7 is vertically threadedly connected to the bottom plate 2 - 1 , and its rod portion abuts against the upper surface of the straight portion of the drag chain body 8 .
[0039] By setting the tightening bolts 7, the assembly firmness of the fixing frame 1 and the supporting frame 2 is ensured, and they will not fall off during use, thereby improving the working reliability.
[0040] The tops of the two vertical parts 1 - 2 are rotatably connected with rollers 3 through a rotating shaft assembly. The rollers 3 are arranged on the inner side of the vertical parts 1 - 2, that is, the rollers 3 are arranged in the space between the two vertical parts 1 - 2.
[0041] The rotating shaft assembly includes a rotating shaft 9, which passes through the vertical part through a circular hole opened in the vertical part 1-2. The shaft section of the rotating shaft located on the inner side of the vertical part is provided with a stopper 10, and the stopper 10 contacts the inner side surface of the vertical part 1-2. The shaft section of the rotating shaft 9 located on the outer side of the vertical part 1-2 has an external thread structure and is threadedly connected with a fixing nut 4. A flat washer 5 and a spring washer 6 are provided between the fixing nut 4 and the outer side surface of the vertical part 1-2, and the spring washer 6 is located on the outer side, and the spring washer 6 is in contact with the fixing nut 4, and the flat washer 5 is in contact with the outer side surface of the vertical part 1-2.
[0042] Furthermore, the fixing nut 4 is an M8 nut.
[0043] The fixing nut 4 presses the flat gasket 5 and the spring gasket 6 together, and cooperates with the baffle 10 to fix the rotating shaft 9 and the vertical part 1-2. The shaft section of the rotating shaft 9 inside the baffle 10 is rotatably connected to the roller 3. Furthermore, the roller 3 is rotatably connected to the rotating shaft 9 through a bearing, and the roller 3 can rotate around its own axis.
[0044] Furthermore, the roller 3 is a nylon roller.
[0045] The remaining structures of the drag chain can be made by using the existing technology and will not be described in detail here.
[0046] When installing the anti-wear device of this embodiment, first place the set position of the straight part of the lower part of the drag chain body 8 between the two vertical parts 1-2, and the upper surface of the horizontal part 1-1 is in contact with the bottom surface of the straight part, then screw the fixing bolts into the fixing holes 1-3 to fix the fixing frame 1 to the straight part of the drag chain body 8, and then install the support frame 2 between the two vertical parts 1-2 through the fixing bolts, rotate the vertical part 1-2 and the tightening bolts 7 on the support frame 2 so that the tightening bolts 7 abut against the straight part of the drag chain body 8, and then install the roller 3 on the inner side of the two vertical parts. Specifically, the roller 3 and the bearing are pre-installed on the end of the rotating shaft 9, and the rotating shaft 9 passes through the vertical part 1-2 from the inner side of the vertical part 1-2 to the outer side until the stop 10 of the rotating shaft 9 is in contact with the inner side surface of the vertical part 1-2, and then the flat gasket 5 and the spring gasket 6 are successively inserted into the part of the rotating shaft 9 extending to the outer side of the vertical part, and then the fixing nut 4 is tightened to complete the installation of the entire anti-wear device.
[0047] During actual operation, when the upper part of the drag chain body droops, the drooping part contacts the roller 3, generating rolling friction with the roller 3, and the drooping part does not generate sliding friction with the lower straight part of the drag chain body 8, thereby avoiding friction damage to the drag chain body and extending the service life of the drag chain.
[0048] The drag chain of this embodiment only needs to install an anti-wear device on the existing drag chain. The anti-wear device adopts common materials and standard structures, has low manufacturing cost and high versatility. The diameter of the nylon roller can be changed in a targeted manner according to the different characteristics of the drag chain to achieve the purpose of smooth dragging of the drag chain. The entire drag chain does not need to use expensive anti-droop materials, and the processing and manufacturing cost is low.
[0049] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.
Claims
1. A wear-resistant drag chain, comprising a drag chain body, characterized in that: An anti-wear device is provided at a set position of the lower straight portion of the drag chain body, and the anti-wear device includes a fixing frame. The fixing frame adopts a U-shaped structure, including a horizontal portion and vertical portions respectively arranged at both ends of the horizontal portion. The horizontal portion is fixed to the bottom surface of the straight portion of the drag chain body, and a detachable support frame located above the straight portion of the drag chain body is provided between the two vertical portions. The horizontal portion and the support frame are both provided with tightening members abutting against the straight portion of the drag chain, and the top of the vertical portion is rotatably connected to a roller, and the roller is located on the inner side of the vertical portion.
2. The wear-resistant drag chain according to claim 1, characterized in that: The pressing pieces on the two vertical parts are coaxially arranged facing each other.
3. The wear-resistant drag chain according to claim 1, characterized in that: Two ends of the support frame are provided with tightening pieces.
4. The wear-resistant drag chain according to claim 1, characterized in that: The jacking piece adopts a threaded jacking piece, the threaded jacking piece connected to the horizontal part is vertically threadedly connected to the horizontal part, and the threaded jacking piece connected to the support frame is vertically threadedly connected to the support frame.
5. The wear-resistant drag chain according to claim 1, characterized in that: The distance between the two vertical parts is greater than the width of the drag chain body.
6. The wear-resistant drag chain according to claim 1, characterized in that: The roller is a nylon roller.
7. The wear-resistant drag chain according to claim 1, characterized in that: The roller is rotatably connected to the vertical part through a rotating shaft assembly. The rotating shaft assembly includes a rotating shaft, which is vertically fixedly connected to the vertical part. The rotating shaft is rotatably connected to the roller located inside the vertical part.
8. The wear-resistant drag chain according to claim 7, characterized in that: The rotating shaft passes through the vertical part and is provided with a stopper, which contacts the inner side surface of the vertical part. The rotating shaft section on the inner side of the stopper is rotatably connected to a roller. The shaft section extending to the outside of the vertical part is an externally threaded shaft and is threadedly connected to a fixing nut. The fixing nut is pressed on the outer side surface of the vertical part to fix the rotating shaft to the vertical part.
9. The wear-resistant drag chain according to claim 8, characterized in that: A flat washer and a spring washer are arranged between the fixing nut and the outer side surface of the vertical portion. The spring washer contacts the fixing nut, and the flat washer contacts the outer side surface of the vertical portion.
10. The wear-resistant drag chain according to claim 1, characterized in that: The horizontal part is provided with a fixing hole, and the horizontal part is fixedly connected to the bottom surface of the straight part of the drag chain body through the fixing hole and the threaded fastener.