CN115574051B

CN115574051B - Unit chain link and drag chain

Info

Publication number: CN115574051B
Application number: CN202211082517.0A
Authority: CN
Inventors: 陈兵; 孟凡跃
Original assignee: Shanghai Weyer Electric Appliances Co ltd
Current assignee: Shanghai Weyer Electric Appliances Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-08-29
Anticipated expiration: 2042-09-06
Also published as: CN115574051A

Abstract

The application discloses a unit chain link and a drag chain, and belongs to the technical field of drag chains. Aiming at the problem that the strength of a drag chain is reduced due to unreasonable clamping structures of a cover plate and a joint plate, the application provides a unit chain link, which comprises two joint plates which are symmetrically arranged and a cover plate which can be detachably connected with the two joint plates, wherein the top end of each joint plate is provided with a groove, a clamping hook is arranged in each groove, two ends of the cover plate are respectively provided with two U-shaped elastic buckles, one end of each U-shaped elastic buckle is fixed with the cover plate, the other end of each U-shaped elastic buckle is positioned at the outer side of the cover plate, the U-shaped elastic buckle gradually enters the groove along with the approach of the cover plate to the groove, and the other end of each U-shaped elastic buckle is clamped with the clamping hook. On one hand, the application avoids forming a notch in the middle of the section plate to reduce the shearing strength of the section plate, and is beneficial to the flow of plastic particles in the injection molding process and improves the molding quality of the section plate; on the other hand, compared with the rigid buckle, the U-shaped elastic buckle is more labor-saving in disassembly and assembly, and the product precision requirement is reduced, so that the production cost is reduced.

Description

Unit chain link and drag chain

Technical Field

The application relates to the technical field of drag chains, in particular to a unit chain link and a drag chain.

Background

The drag chain, also called wire and cable protection drag chain, is a device which can restrict the cable or wire or air pressure pipe and oil pressure pipe to facilitate the rotation and movement, is often applied to reciprocating movement occasions, and can play the roles of traction and protection for the built-in cable or wire or air pressure pipe and oil pressure pipe. Drag chains have been widely used in the industries of numerically controlled machine tools, electronic equipment, stone machinery, glass machinery, injection molding machines, manipulators, lifting and transporting equipment, automated warehouses, and the like.

The drag chain is shaped like a tank chain and consists of a plurality of unit chain links, and the chain links can freely rotate. The drag chain inner height, inner width, and bend radius R are selected differently. The unit chain link consists of a left joint plate, a right joint plate, an upper cover plate and a lower cover plate. Each section of the drag chain can be opened, the assembly and the disassembly are convenient, the threading is not needed, and the cable, the oil pipe, the air pipe and the like can be put into the drag chain after the cover plate is opened.

At present, most drag chains are made of plastics, cover plates and chain plates are in buckle connection, but the clamping structure is difficult to disassemble, for example, china patent application publication No. CN212744881U discloses a drag chain with a new structure, and main chain plate joints comprise a bottom plate and side plates which are symmetrically arranged on two sides of the bottom plate and are perpendicular to the bottom plate; the separation blade 3 locates the one end that bottom plate 1 was kept away from to two curb plates 2, fixedly connected with fixture block 27 on the inner wall of one side that two curb plates 2 are opposite to, and draw-in groove 31 has been seted up at the both ends of separation blade 3, and fixture block 27 and draw-in groove 31 butt promptly improve the self intensity of main part link joint 100 through separation blade 3, and, separation blade 3 also plays the effect of bearing and supporting the foreign object, and the foreign object can be understood as cable, oil pipe, trachea, water pipe etc.. The scheme has the following defects: the clamping structure occupies the inner space of the drag chain, so that the outer size is larger, and meanwhile, the clamping structure adopts a rigid clamping structure, so that the disassembly is inconvenient.

The novel drag chain comprises a plurality of rotatable chain links which are connected end to end, wherein each chain link comprises two side plates which are symmetrically distributed, two cover plates which are used for connecting the two side plates and are perpendicular to the side plates, the two cover plates are directly opposite to each other and are located between the side plates, the side plates and the cover plates form an annular space, two ends of at least one cover plate in the two cover plates are hinged to the side plates, two ends of each cover plate are provided with hinging heads, hinging shafts which extend outwards are arranged on two sides of each hinging head along the length direction of the drag chain, hinging grooves matched with the hinging heads are formed in the side plates, and hinging clamping grooves matched with the hinging shafts are formed in two sides of each hinging groove along the length direction of the drag chain. The scheme adopts a high-strength drag chain, the connection plates on the chain links are matched firmly, and the accuracy of the rotation bending angle between the chain links is high; the connecting structure between the side plate and the cover plate has high strength and is easy to detach. The scheme has the following defects: because the hooks 12 protrude out of the side surface of the section plate, the inner space of the drag chain is occupied, left and right demolding is needed during processing and production, parting lines (as shown by the broken line in the figure 1) are left on the inner side and the lower side of the section plate, the parting lines rub against a protection object, such as a cable, in the motion process of the drag chain, the cable is damaged and loses the protection function due to long-term operation, meanwhile, the parting lines are larger and larger along with the production time, the service life of the mold is greatly shortened, and the production cost is increased; in addition, the joint structure enables the joint plate to be disconnected from the middle to generate a notch (as indicated by an arrow a in fig. 1), the notch enables the shearing strength of the drag link plate to be attenuated to a certain extent, the drag chain strength is reduced, the notch can cause difficult plastic filling in the injection molding process, and the production cost is further improved.

Therefore, in view of the above problems, it is necessary to propose a further solution to at least one of the problems.

Disclosure of Invention

In order to solve the problem of the reduction of the strength of the drag chain caused by unreasonable clamping structures of the related cover plate and the link plate, the application provides a unit chain link and the drag chain. The technical scheme is as follows:

the utility model provides a unit chain link, includes two festival boards that the symmetry set up and can dismantle the connection two the apron of festival board, the top of festival board is provided with the recess, be provided with the trip in the recess, the both ends of apron are provided with two U type elasticity buckles respectively, the one end of U type elasticity buckle with the apron is fixed, and the other end is located the outside of apron, along with the apron is close to the recess, U type elasticity buckle gets into gradually in the recess, and its other end with trip joint.

In a preferred embodiment of the present application, a disassembling groove is provided at the top of the other end of the U-shaped elastic buckle, and a gap is provided between the disassembling groove and the hook for an external tool to insert and rotate between the disassembling groove and the hook.

In a preferred embodiment of the present application, the other end of the U-shaped elastic buckle is provided with a buckle portion that is matched with the hook, and the buckle portion is located below the detachment groove.

In a preferred embodiment of the present application, the hook is disposed at a top end of the groove, the hook includes a slope, the slope is disposed towards the disassembling groove, and the slope is inclined from bottom to top in a direction away from the disassembling groove.

In a preferred embodiment of the present application, the hook further includes two side limiting blocks, and the two side limiting blocks are disposed on two sides of the inclined plane.

In a preferred embodiment of the present application, the hook includes a clamping surface i clamped with the fastening portion, the clamping surface i is a horizontal plane, the fastening portion includes a clamping surface ii clamped with the hook, and the clamping surface ii is inclined upward relative to the horizontal plane.

In a preferred embodiment of the present application, the inner end of the groove is penetrated, so that one end of the cover plate is tilted to drive the U-shaped elastic buckle at the other end to separate from the inner end of the groove.

In a preferred embodiment of the present application, cantilever arms are respectively disposed at two ends of the cover plate, a rotating shaft is disposed at a side edge of the cantilever arms, and a clamping groove matched with the rotating shaft is disposed in the groove, so that the cover plate is rotatably connected with the section plate.

In a preferred embodiment of the present application, two cantilever arms are respectively disposed at two sides of the U-shaped elastic buckle, and the rotating shaft is disposed at one side of the cantilever arm away from the U-shaped elastic buckle.

The other technical scheme is as follows:

a drag chain comprising a plurality of unit links as described in any one of the above connected in sequence.

Compared with the prior art, the application has the beneficial effects that:

(1) According to the application, the groove is formed in the top end of the joint plate, the clamping hooks are arranged in the groove, two U-shaped elastic buckles are respectively arranged at the two ends of the cover plate, and enter the groove along with the approach of the cover plate to the groove and are clamped with the clamping hooks, so that on one hand, a notch is prevented from being formed in the middle of the joint plate, the shearing strength of the joint plate is prevented from being reduced, plastic particles flow in the injection molding process, and the molding quality of the joint plate is improved; on the other hand, compared with the rigid buckle, the U-shaped elastic buckle is more labor-saving in disassembly and assembly, and the product precision requirement is reduced, so that the production cost is reduced.

(2) The clamping hooks in the section plate are arranged in the grooves, so that the whole section plate can be processed and produced in an up-and-down demolding mode, and further, the inside of the section plate is free of parting lines, and a protection object in the drag chain can be effectively protected for a long time.

(3) According to the application, the inclined surface facing the dismounting groove is arranged on the clamping hook and is inclined from bottom to top in a direction away from the dismounting groove, so that when an external tool such as a straight screwdriver is used, the external tool can be guided into the dismounting groove through the inclined surface, and the operation is convenient; simultaneously, through set up the limit piece in the both sides on inclined plane to restrict outside instrument left and right sides slope, further improve the simple operation degree, and increase trip intensity through the limit piece, improve its stability with U type elasticity buckle joint.

(4) According to the application, the clamping surface I of the clamping hook and the clamping part is set as a horizontal plane, and the clamping surface II of the clamping hook and the clamping part is set as an inclined plane which is inclined upwards relative to the horizontal plane, so that the clamping stability is improved compared with the horizontal arrangement, and the sensitivity to the product precision is reduced.

Drawings

FIG. 1 is a schematic view of the structure of a link plate and a base plate of a drag chain in the prior art;

FIG. 2 is a schematic view of a unit link according to the present application;

FIG. 3 is a schematic view of the structure of the panel and the bottom plate according to the present application;

FIG. 4 is a schematic view of a cover plate according to the present application;

fig. 5 is a schematic cross-sectional view of a unit link in the present application.

Specifically, 100, a section plate; 110. a groove; 111. a clamping groove; 120. a hook; 121. a side limit block; 122. an inclined plane; 123. a clamping surface I;

200. a bottom plate;

300. a cover plate; 310. a cantilever; 311. a rotating shaft; 320. u-shaped elastic buckle; 321. a dismantling groove; 322. a fastening part; 3221. and a clamping surface II.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in a specific case.

Example 1:

as shown in fig. 2, a unit link includes two link plates 100 symmetrically disposed and a cover plate 300 detachably connecting the two link plates 100. The top and bottom ends of the two joint plates 100 may be detachably connected to the cover plate 300, or the bottom end may be fixedly connected to the base plate 200, and the top end may be detachably connected to the cover plate 300, which is not limited in the present application.

As shown in fig. 3, a groove 110 is formed at the top end of the panel 100, and a hook 120 is disposed in the groove 110. As shown in fig. 4, two U-shaped elastic buckles 320 are respectively disposed at two ends of the cover plate 300, one end of each U-shaped elastic buckle 320 is fixed with the cover plate 300, i.e. a fixed end, and the other end is located at the outer side of the cover plate 300 to be clamped with the clamping hooks 120, i.e. clamping ends. The two ends of the U-shaped elastic buckle 320 are substantially flat so that the surface of the cover plate 300 is substantially a plane without protruding portions. When the cover plate 300 is mounted on the joint plate 100, the U-shaped elastic buckle 320 gradually enters the groove 110 as the cover plate 300 approaches the groove 110, and the other end is engaged with the hook 120 by deformation. The unit chain link realizes the joint through U type elasticity buckle 320 deformation on the apron, on the one hand compares more laborsaving in conventional rigid buckle installation dismantlement, this is because the rigidity joint structure is in order to guarantee great joint force, leads to it can need bigger power when the installation dismantlement, on the other hand, elasticity deformation structure is located apron 300 for trip 120 on the festival board 100 can be the rigid structure, thereby avoided seting up the breach in the middle of the festival board 100, improved the shearing strength of festival board 100, and be favorable to the plastic particle to flow in the injection moulding process, improved festival board 100 shaping quality. Meanwhile, the elastic clamping structure reduces the product precision requirement, and further reduces the production cost.

For facilitating the clamping, the other end of the U-shaped elastic buckle 320 is provided with a buckle portion 322 matched with the hook 120, and the buckle portion 322 is located below the dismounting groove 321.

In order to facilitate the detachment of the cover plate 300 from the joint plate 100, the top of the other end of the U-shaped elastic buckle 320 is provided with a detachment groove 321, that is, the top of the end clamped with the clamping hook 120 is provided with a detachment groove 321, a gap is formed between the detachment groove 321 and the clamping hook 120 for an external tool, for example, a straight screwdriver to be inserted into the detachment groove 321 and rotate between the detachment groove 321 and the clamping hook 120, so that the upper end of the straight screwdriver is inserted into the detachment groove 321 and rotates towards the direction of the detachment groove 321, and the clamping end of the U-shaped elastic buckle 320 is deformed towards the fixed end, so that the clamping part 322 of the clamping end is separated from the clamping connection with the clamping hook 120, and the cover plate 300 can be detached from the joint plate 100. It can be appreciated that the depth of the groove 110 is adapted to the length of the U-shaped elastic buckle 320, so that the buckle portion 322 can be separated from the engaged state with the hook 120 through the deformation of the U-shaped elastic buckle 320. When the fastening portion 322 is disengaged from the hook 120, the end U-shaped elastic fastener 320 can be driven to be completely disengaged from the groove 110 by continuing to rotate the straight screwdriver.

It can be understood that the lower end surface of the fastening portion 322, that is, the contact surface of the fastening portion 322 in the process of being fastened with the fastening hook 120 is an inclined surface, and the contact surface is inclined upwards along with being far away from the fastening end, that is, is low near the fastening end and is high away from the fastening end.

The hook 120 is preferably disposed at the top end of the recess 110, and the hook 120 includes a slope 122, the slope 122 is disposed towards the disassembly slot 321, and the slope 122 is inclined from bottom to top towards a direction away from the disassembly slot 321, so that when an external tool, such as a straight screwdriver, is used, the tool can be guided into the disassembly slot 321 through the slope 122, thereby facilitating operation. The trip 120 further comprises two side limiting blocks 121, wherein the two side limiting blocks 121 are arranged on two sides of the inclined plane 122, so that the left-right inclination of an external tool is limited, the operation convenience is further improved, the strength of the trip 120 is increased through the side limiting blocks 121, and the stability of the trip with the U-shaped elastic buckle 320 is improved.

As shown in fig. 5, the hook 120 includes a clamping surface i 123 clamped with the clamping portion 322, where the clamping surface i 123 is a horizontal plane, the clamping portion 322 includes a clamping surface ii 3221 clamped with the hook 120, and the clamping surface ii 3221 is inclined upward relative to the horizontal plane, i.e. is close to the clamping end and low, and is far away from the high setting of the clamping end. If the clamping surface ii 3221 is also a horizontal surface, the stability of the clamping is reduced when the clamping surface is deformed by abrasion. The joint face II 3221 that the upward slope set up has improved the stability of joint, has reduced the sensitivity to product precision simultaneously.

Example 2:

in this embodiment, the inner ends of the grooves 110 penetrate, and the inner ends of the grooves 110 are the ends near the inside of the unit links, based on embodiment 1. When one end of the cover plate 300 is tilted to disengage from the hinge plate 100, it drives the U-shaped elastic buckle 320 at the other end to disengage from the inner end of the groove 110, thereby disengaging the buckle portion 322 at the other end from the hook 120.

Cantilever 310 is set at two ends of cover plate 300, rotating shaft 311 is set at side of cantilever 310, clamping groove 111 matched with rotating shaft 311 is set in groove 110, so that cover plate 300 is connected with joint plate 100 in rotation. Along with the approach of the cover plate 300 to the groove 110, the rotating shaft 311 is clamped into the clamping groove 111, so that on one hand, the stability of the connection between the cover plate 300 and the joint plate 100 is enhanced, and on the other hand, when one end of the cover plate 300 is separated from the joint plate 100, the other end is not completely separated, and further, protection objects such as cables and the like are conveniently placed.

Two sides of the U-shaped elastic buckle 320 can be respectively provided with two cantilevers 310, and the rotating shaft 311 is arranged at one side of the cantilever 310 away from the U-shaped elastic buckle 320.

Example 3:

a drag chain comprises a plurality of unit links which are sequentially connected with the embodiment 1 or the embodiment 2, so that the drag chain has higher strength, particularly the joint plate 100 has higher shearing strength, and the cover plate is convenient to detach.

In summary, the groove is formed in the top end of the joint plate, the clamping hooks are arranged in the groove, two U-shaped elastic buckles are respectively arranged at two ends of the cover plate, and enter the groove along with the approach of the cover plate to the groove and are clamped with the clamping hooks, so that on one hand, the situation that the shearing strength of the joint plate is reduced due to the fact that a notch is formed in the middle of the joint plate is avoided, meanwhile, plastic particles flow in the injection molding process, and the molding quality of the joint plate is improved; on the other hand, compared with the rigid buckle, the U-shaped elastic buckle is more labor-saving in disassembly and assembly, and the product precision requirement is reduced, so that the production cost is reduced.

Furthermore, it should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Claims

1. The utility model provides a unit chain link, includes two festival boards that symmetry set up and can dismantle the apron of connecting two the festival board, its characterized in that, the top of festival board is provided with the recess, be provided with the trip in the recess, the both ends of apron are provided with two U type elasticity buckles respectively, the one end of U type elasticity buckle with the apron is fixed, the other end is located the outside of apron, along with the apron is close to the recess, U type elasticity buckle gets into gradually in the recess, and its other end with trip joint; cantilever arms are respectively arranged at two ends of the cover plate, a rotating shaft is arranged at the side edge of the cantilever arms, and a clamping groove matched with the rotating shaft is arranged in the groove so that the cover plate is rotationally connected with the section plate; two sides of the U-shaped elastic buckle are respectively provided with two cantilevers, and the rotating shaft is arranged at one side of the cantilevers, which is away from the U-shaped elastic buckle; the end part of the U-shaped elastic buckle, which is far away from the cover plate, is positioned between the end parts of the two cantilevers, which are far away from the cover plate; the top of the other end of the U-shaped elastic buckle is provided with a disassembly groove, and a gap is reserved between the disassembly groove and the clamping hook for an external tool to be inserted and rotate between the disassembly groove and the clamping hook; the clamping hook is arranged at the top end of the groove, the clamping hook comprises an inclined plane, the inclined plane is arranged towards the disassembly groove, and the inclined plane is inclined from bottom to top towards the direction far away from the disassembly groove; the clamping hook further comprises two side limiting blocks, and the two side limiting blocks are arranged on two sides of the inclined plane.

2. The unit link according to claim 1, characterized in that the other end of the U-shaped elastic buckle is provided with a buckle part matched with the hook, and the buckle part is positioned below the dismounting groove.

3. The unit link according to claim 2, wherein the hook comprises a clamping surface i clamped with the clamping portion, the clamping surface i is a horizontal plane, the clamping portion comprises a clamping surface ii clamped with the hook, and the clamping surface ii is inclined upward relative to the horizontal plane.

4. The unit link according to claim 1, wherein the inner end of the groove is penetrated so that tilting of one end of the cover plate drives the U-shaped elastic buckle at the other end to disengage from the inner end of the groove.

5. A drag chain comprising a plurality of unit links as claimed in any one of claims 1 to 4 connected in sequence.