TWM529783U - Chain and connection piece thereof - Google Patents

Description

Chain and its tab

The present invention relates to a chain, and more particularly to a chain that is connected in a loop shape and a tab.

Referring to Figures 1 and 2, a conventional chain includes a chain body 1 and a joint unit 2. The chain body 1 includes two chain end units 11 respectively located at opposite ends, each chain end unit 11 defining a shaft hole 111 located adjacent one end of the other chain end unit 11.

The connector unit 2 connects the chain end units 11 together, and includes a connecting piece 21 corresponding to one side of the chain end unit 11 and having two spaced sleeve holes 211, and a corresponding straddle The tabs 22 of the chain end unit 11 away from the side of the connecting piece 21 and having two spaced apart perforations 221, two correspondingly connected to the connecting piece 21, the chain end unit 11 and the tab 22 The connecting shaft 23 and a piece of the fastening piece 24 on the side of the connecting piece 22 away from the side of the chain end unit 11 and fastening the connecting shafts 23. Each of the connecting shafts 23 correspondingly extends through the corresponding hole 211 of the connecting piece 21, the shaft hole 111 of each chain end unit 11, and the corresponding hole 221 of the connecting piece 22.

In order to facilitate assembly, the aperture of each of the through holes 221 of the tab 22 is slightly larger than the diameter of the corresponding connecting shaft 23, that is, the through hole 221 is loosely engaged with the connecting shaft 23, so the perforation is used in use. 221 and the connecting shaft 23 will move relative to each other due to the gap, and collide with each other, causing the peripheral portion of the through hole 221 to be fatigue-damaged and reduce the structural strength, and the hole diameter becomes large due to wear, and then loose or Problems such as breakage, so the chain design still needs improvement.

Accordingly, it is an object of the present invention to provide a tab for a chain that can increase the strength of the structure.

Thus, the tab of the novel chain includes a sheet body having two spaced apart through holes, and two collars respectively embedded in the insert holes of the sheet body, each collar ring defining A perforation is produced, each of which has a hardness greater than the hardness of the body of the sheet.

Another object of the present invention is to provide a chain that can increase the strength of the structure.

The novel chain comprises a chain body and a joint unit. The chain body includes two chain end units located at opposite ends, each of which defines a shaft bore located adjacent one end of the other chain end unit. The joint unit connects the chain end units of the chain body together, the joint unit comprises a piece of joint piece, and two connecting shafts. The tab is correspondingly disposed on one side of the chain end unit, the tab has a sheet body having two spaced apart through holes, and two of the inserts are respectively embedded in the insert holes of the sheet body a collar, each of which defines a perforation, each of which has a hardness greater than a hardness of the body of the sleeve, the connecting shaft connecting the tab and the chain end unit, each of the connecting shafts being inserted Corresponding to the shaft hole and the through hole.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 3-6, a first embodiment of the novel chain includes a chain body 3 and a joint unit 4.

The chain body 3 is formed in a ring shape along the length direction, and includes two chain end units 31 respectively located at opposite ends, and a plurality of chain end units 31 connected in series with each other and connected between the chain end units 31. The unit 32 is connected in series. Hereinafter, only the portions adjacent to the chain end units 31 will be described. Each of the chain end units 31 defines a shaft hole 311 located at one end of the other chain end unit 31. In terms of construction, each chain The end unit 31 has two spaced-apart chain pieces 312, one end of which is respectively connected with a bushing 313 connecting the chain pieces 312 and provided with the shaft hole 311, and a rotatably sleeved on the periphery of the bushing 313 A roller 314 is located between the links 312. Since the chain body 3 has a large number of structural types, and it is not the design focus of the first embodiment, it is not limited to the above types when implemented, and the detailed configuration thereof will not be described here.

The connector unit 4 connects the chain end units 31 of the chain body 3 together, and the connector unit 4 includes a connecting piece 41 corresponding to one side of the chain end unit 31, and a piece correspondingly spans the The connecting end piece unit 31 is away from the tab piece 42 on one side of the connecting piece 41, two connecting shafts 41 corresponding to the connecting piece 41, the chain end unit 31 and the connecting piece 42 are located, and one piece is located on the connecting piece 42 is fastened from one side of the chain end unit 31 and fastens the fastening tabs 44 of the connecting shafts 43.

The connecting piece 41 has two spaced-apart holes 411. The tab 42 has a sheet body 421 and two collars 422. The sheet body 421 has two spaced apart loop ends 423 and a connecting portion 424 that mediates the loop ends 423. Each of the loop ends 423 defines a bore 425 and has a ring end edge 426 that is arcuate and centrally located with the bore 425 at the outer periphery. The connecting portion 424 has two connecting edges 427 which are spaced apart and opposed to each other, and each connecting edge 427 connects one end adjacent to the end edge 426 of the ring. The distance between the connecting edges 427 gradually increases from the two sides toward the center. shorten. The sheet body 421 also has two spaced apart sides 428.

Each of the collars 422 is tightly fitted into each of the insert holes 425 of the sheet body 421 and defines a perforation 429. It should be noted that the first embodiment is implemented under the same tab 42 specifications. For example, the size of the through hole 429 of the collar 422 is equal to the size of the through hole 221 of the tab 22 of FIG. The thickness of the collar 422 is equal to 20%±5% of the diameter of the respective connecting shafts 43. The diameter of the connecting shaft 43 is also the size of the shaft of each of the series units 32 of the chain body 3. If the collar is The thickness of 422 is less than 20%-5% of the diameter of the connecting shaft 43, the manufacturing yield is low and the service life is short. If the thickness of the collar 422 is greater than 20%+5% of the diameter of the connecting shaft 43, the thickness is relatively reduced. The area of a ring end portion 423, on the contrary, weakens the strength of the sheet body 421, particularly the ring end portion 423, the hardness of the collar 422 is greater than the hardness of the sheet body 421. In the first embodiment, the collar 422 is made of low-carbon alloy steel, and the method can be formed by powder metallurgy. The material and the preparation method are not limited thereto. For example, a material similar to the bushing 313 may be used, or the bushing 313 of a suitable size may be directly used. replace. The collar 422 has two end faces 420 spaced apart and respectively corresponding to the sides 428, each of which faces flush with the side 428 of the sheet body 421 on the same plane. In manufacturing, the sheet body 421 and the collars 422 are each formed into a shape, and then the collars 422 are tightly inserted into the sheet body 421.

Each of the connecting shafts 43 has a central shaft portion 431, an end expanded portion 432 formed at one end of the central shaft portion 431 and having a larger diameter than the central shaft portion 431, and one end formed at the other end of the central shaft portion 431 and having a smaller diameter than the central shaft portion The neck portion 433 of the 431, and a convex portion 434 formed at a side of the neck portion 433 away from the one end of the center shaft portion 431 and having a larger diameter than the neck portion 433. The central shaft portion 431 extends through the corresponding hole 411 of the connecting piece 41, the shaft hole 311 of each chain end unit 31, and the through hole 429 of each collar 422. The diameter of the central shaft portion 431 is greater than or equal to the aperture of the sleeve hole 411, and the aperture of the shaft hole 311 is smaller than the aperture of the through hole 429. Therefore, the central shaft portion 431 is tightly fitted to the sleeve hole 411, and The shaft hole 311 and the through hole 429 are loosely disposed. The end expansion portion 432 abuts against one side of the connecting piece 41 away from the tab 42. The fastening tabs 44 are fastened to the constricted portions 433 of the connecting shafts 43 and are placed on the convex heads 434.

Referring to FIG. 7, the second embodiment of the present invention has a configuration substantially the same as that of the first embodiment, except that the shape of the tab 42 of the second embodiment is different, and the connecting portion 424 of the tab 42 is different. The connecting edges 427 are spaced apart in parallel. The distance between the connecting edges 427 is equal from the two sides to the center, and each connecting edge 427 is linearly connected to one end adjacent to the ring end edge 426.

In summary, the tab 42 of the present invention is mainly such that the collar 422 is embedded in the main body 421 of the sheet body, thereby replacing the portion of the tab 22 of FIG. Each of the new connecting shafts 43 is inserted into the perforations 429 defined by the respective collars 422. Since the respective collars 422 have high hardness and wear resistance, they are not easily worn during use, and the joints can be lifted. The structural strength of the sheet 42 avoids the problem of looseness or breakage, and can effectively improve the wear resistance of the chain, so the relative movement can be relatively reduced without affecting the pivoting operation with the chain end units 31. The wear of the chain during high-speed operation and high-tension operation can prolong the service life of the chain and reduce the frequency of replacing the chain, so the purpose of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

3‧‧‧Chain body
31‧‧‧Chain end unit
311‧‧‧Axis hole
312‧‧‧ Links
313‧‧‧ bushing
314‧‧‧Roller
32‧‧‧Sequence unit
4‧‧‧Connector unit
41‧‧‧Connecting piece
411‧‧‧ hole sets
42‧‧‧Connector
421‧‧ ‧ body
422‧‧‧ collar
423‧‧‧End of the ring
424‧‧‧Connecting Department
425‧‧‧ hole
426‧‧‧ring edge
427‧‧‧ Connecting edge
428‧‧‧ side
429‧‧‧Perforation
420‧‧‧ end face
43‧‧‧Connected shaft
431‧‧‧Axis Department
432‧‧‧End expansion
433‧‧‧neck
434‧‧‧ convex head
44‧‧‧Snap tabs

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is an incomplete partial perspective exploded view of a conventional chain; Figure 2 is a one of the chain of Figure 1. 3 is an incomplete partial exploded view of a first embodiment of the present invention; FIG. 4 is an incomplete partial cross-sectional view of the first embodiment; FIG. A front view of one of the tabs of the embodiment; Fig. 6 is a cross-sectional view of the tab of the first embodiment; and Fig. 7 is a front elevational view of the tab of a second embodiment of the novel chain.

3‧‧‧Chain body

31‧‧‧Chain end unit

311‧‧‧Axis hole

312‧‧‧ Links

314‧‧‧Roller

32‧‧‧Sequence unit

4‧‧‧Connector unit

423‧‧‧End of the ring

424‧‧‧Connecting Department

425‧‧‧ hole

428‧‧‧ side

429‧‧‧Perforation

420‧‧‧ end face

43‧‧‧Connected shaft

41‧‧‧Connecting piece

411‧‧‧ hole sets

42‧‧‧Connector

421‧‧ ‧ body

422‧‧‧ collar

431‧‧‧Axis Department

433‧‧‧neck

434‧‧‧ convex head

44‧‧‧Snap tabs

Claims (10)

A connector piece for a chain, comprising: a sheet body having two spaced apart through holes; and two collars respectively embedded in the through holes of the sheet body, each of the collars defining a circumference Perforation, the hardness of each collar is greater than the hardness of the body of the sheet. The tab of the chain of claim 1, wherein the sheet body further has two spaced apart sides, each of the collars having two end faces that are spaced apart and respectively corresponding to the sides, each end corresponding to The sides are flush on the same plane. The tab of the chain of claim 1, wherein each of the collars is made of low carbon alloy steel. The tab of the chain of claim 1, 2 or 3, wherein the body has two ring ends that respectively define the holes, and a connecting portion that mediates the ends of the rings Each ring end portion has a ring end edge having a circular arc shape and being concentric with the insertion hole, the connecting portion having two connecting edges which are spaced apart and opposed to each other, and each connecting edge connects the ring end edges At one of the adjacent ends, the distance between the connecting edges is gradually shortened from the both sides toward the center. The tab of the chain of claim 1, 2 or 3, wherein the body has two ring ends that respectively define the holes, and a connecting portion that mediates the ends of the rings Each ring end portion has a ring end edge having a circular arc shape and having the same center as the insertion hole, the connecting portion having two parallel spaced and linearly extending connecting edges, each connecting edge connecting the ring end edges At one end of the neighborhood, the distance between the connecting edges is equal from the sides to the center. A chain comprising: a chain body comprising two chain end units respectively located at opposite ends, each chain end unit defining a shaft hole located adjacent one end of the other chain end unit; and a joint unit, Connecting the chain end units of the chain body together, the joint unit comprises: a piece of tabs correspondingly disposed on one side of the chain end units, the tab having a plurality of spaced apart through holes a sheet body, and two collars respectively embedded in the holes of the body of the sheet, each of the collars defining a perforation, the hardness of each collar being greater than the hardness of the body, and two The connecting shaft connects the tab and the chain end unit, and each connecting shaft is inserted into the corresponding communicating shaft hole and the through hole. The chain of claim 6 wherein each collar has a thickness equal to 20% ± 5% of the diameter of the respective connecting shaft. The chain of claim 6 or 7, wherein each of the connecting shafts of the joint unit has a central shaft portion correspondingly extending through the shaft hole and the through hole, the diameter of the central shaft portion being smaller than the diameter of the through hole. The chain of claim 8, wherein each of the joint shafts further has an end portion formed at one end of the center shaft portion and having a diameter larger than the center shaft portion, and one end portion formed at the center shaft portion And a neck portion having a diameter smaller than the central shaft portion, and a convex portion formed at one end of the neck portion away from the central shaft portion and having a diameter larger than the neck portion, the joint unit further comprising a piece corresponding to the chain end unit a connecting piece away from one side of the connecting piece, and a piece of fastening piece located on a side of the connecting piece away from the chain end unit, the connecting piece is sleeved on the central shaft portions of the connecting shafts and placed on the side The end pieces are fastened to the neck portions of the connecting shafts and are placed on the protruding heads. The chain of claim 9, wherein the chain body further comprises a plurality of tandem units pivotally connected to each other and connected between the chain end units, each chain end unit having two spaced apart chains A blade and a pair of ends are respectively provided with bushings for connecting the chain plates and providing the shaft holes, and a roller rotatably sleeved around the bushing and located between the chain plates.