TWM529091U - Teeth shape chain - Google Patents

Description

Toothed chain

The present invention relates to a chain, and more particularly to a toothed chain suitable for use on a high load mechanical body.

Referring to Figures 1 and 2, there is a conventional five-piece toothed chain 1 which can be engaged with a sprocket 10 and includes a plurality of links 11 which are staggered and overlapped in the longitudinal direction, and a number a series unit 12 respectively connecting the adjacent links 11 in series, each of the links 11 has two outer and outer spaced pieces 111, and two pieces are interposed between the outer links 111 The inner chain piece 112, an intermediate chain piece 113 between the inner chain pieces 112, a first bushing 114 connected in series with the inner chain piece 112 and the intermediate chain piece 113, and a through hole a first bushing 114 and a first chain shaft 115 fixedly coupled to the outer chain pieces 111, each inner chain piece 112 having an inner mating surface 117 facing the sprocket 10 and defining an inner card slot 116. Each intermediate link 113 has an intermediate engagement surface 119 that faces the sprocket 10 and defines an intermediate slot 118. The inner slot 116 and the intermediate slot 118 are spaced apart from each other.

Each of the series units 12 has a second bushing 121 joined to the inner chain piece 112 of one of the links 11 and the adjacent intermediate link piece 113 of the chain link 11, and a second bushing 121 The second chain shaft 122 is fixedly coupled to the outer chain pieces 111 of one of the links 11 after passing through the second bushing 121.

Although the conventional toothed chain 1 can achieve the purpose of the transmission mechanical body by the cooperation of the above structure, when the toothed chain 1 is in operation, the inner chain pieces 112 and the intermediate chain pieces 113 are subjected to the opposite When the side tension is applied, the first and second bushings 114, 121, and the first and second chain shafts 115, 122 are subjected to incomplete and uneven stress due to the inner chain piece 112 and the foregoing Since the thickness of the intermediate link 113 is small, the force applied to the first and second bushings 114 and 121 and the first and second links 115 and 122 is small, and the pressure is concentrated. Therefore, the components are Easy to wear.

Further, the inner chain pieces 112 and the intermediate link pieces 113 of each link 11 are not only spaced apart, but also the thickness of the sheet body is small. Therefore, when the conventional toothed chain 1 and the sprocket 10 are engaged, the meshing of the inner engaging surface 117 of the inner chain piece 112 with the sprocket 10 is not only incomplete, but the meshing area is also small. The meshing area of the intermediate link 113 of each link 11 and the sprocket 10 is also small. The above-mentioned insufficient meshing area is liable to cause instability during meshing. In addition, the number of sheets of each link 11 of the conventional toothed chain 1 is up to five, and it is also required to be staggered in series with each other, so that not only many components but also many assembly steps are required.

Referring to Figure 3, there is a conventional seven-piece toothed chain 1' having a structure similar to that of the toothed chain 1 of Figures 1, 2, except that the toothed chain 1' Each link 11' has three spaced inner links 112' and two intermediate links 113' sandwiched between adjacent inner links 112'. 4, a conventional nine-piece toothed chain 1" is also constructed similarly to the conventional toothed chain 1 of FIG. 1, except that each chain link 1" of the toothed chain 1" Each has four spaced inner chain pieces 112" and three intermediate links 113" respectively sandwiched between adjacent inner chain pieces 112". However, regardless of the number of the inner chain pieces 112', 112" and the intermediate chain pieces 113', 113", the resulting loss is the same as that of the toothed chain 1 of Figs. 1, 2 and will not be described.

It is an object of the present invention to provide a toothed chain that overcomes at least one of the disadvantages of the prior art.

The tooth chain of the present invention can be meshed with a sprocket having a plurality of sprocket wheels, and the sprocket chain comprises a plurality of links arranged along a length direction, and a plurality of links are respectively connected in series a first chain axis of two adjacent ones, each link having two outer chain pieces spaced apart, one inner chain piece between the outer chain pieces, and one serially connected left and right The outer chain piece and the second chain shaft of the inner chain piece, each outer chain piece has two outer chain holes respectively for the corresponding first chain shaft and the second chain shaft to pass through, and An outer end surface away from the sprocket, wherein the inner chain piece has a thickness of 2.5 to 3.5 times the thickness of each outer chain piece, and has a first engaging surface adjacent to the sprocket and defining a first card slot And two inner chain holes respectively passing through the corresponding first chain shaft and the second chain shaft, and an inner end surface away from the sprocket, wherein the inner chain holes have a through hole through the center Connecting, the outer chain holes have a line connecting the outer holes through the center, and the distance between the outer end faces and the outer holes , Equal to the distance between the inner end surface of the connection hole.

The beneficial effect of the present invention is that the cooperation of the foregoing structure can simplify the necessary components and assembly processes of each link, and at the same time improve the force receiving area between the inner chain pieces and the first and second chain shafts.

Referring to Figures 5, 6, and 7, a first embodiment of the present toothed chain can be engaged with a sprocket 2 having a plurality of sprocket teeth 21 disposed at equal angles about a center of rotation. The toothed chain comprises a plurality of links 3 arranged along a length direction, and a plurality of first chain shafts 4 respectively connected in series with two of the adjacent ones of the links 3. Each link 3 has two outer chain pieces 31 spaced apart from each other, one inner chain piece 32 interposed between the outer chain pieces 31, and a pair of outer chain pieces 31 interlaced left and right and the same The second chain shaft 33 of the inner link piece 32.

Each outer chain piece 31 has a first surface 311 facing the inner chain piece 32, a second surface 312 spaced apart from the first surface 311, two left and right portions disposed through the first surface 311 and the second An outer chain hole 313 of the surface 312, an outer oil hole 314 penetrating the first surface 311 and the second surface 312 and interposed between the outer chain holes 313, and a first surface 311 and the first surface An outer end surface 315 between the two surfaces 312, an arc concave surface 316, and an outer hole line 317 passing through the center between the outer chain holes 313, the outer end surface 315 is away from the outer hole line 317 The sprocket 2 is parallel to the outer hole connecting line 317 with a first distance 318 therebetween, and the concave curved surface 316 is adjacent to the sprocket 2, and the concave curved surface 316 is opposite to the outer hole connecting line 317. In the shape of a central arc, the first surface 311 has a guiding portion 319 adjacent to the concave curved surface 316.

One of the thicknesses 320 of the inner chain piece 32 is 2.5 to 3.5 times, preferably 3 times, the thickness 310 of one of the outer chain pieces 31. The inner chain piece 32 has two inner and outer side surfaces 321 , two inner chain holes 322 extending through the side surfaces 321 , and an inner oil hole 323 extending through the side surfaces 321 and between the inner chain holes 322 . An inner end surface 324 connected between the sides 321 , a first engagement surface 326 connected between the side surfaces 321 and defining a first slot 325 , and two connections between the sides 321 The second engaging surface 329 has a length of about half of the first engaging surface 326 and is located on the opposite side of the first engaging groove 325. The inner chain holes 322 have a through-hole connecting line 327 passing through the center, and the inner end surface 324 is parallel to the inner hole connecting line 327, and has a second therebetween. Distance 328, the second distance 328 is equal to the first distance 318. The first card slot 325 faces the sprocket 2 and is engageable by the corresponding sprocket 21 on the sprocket 2.

The toothed chain further includes a plurality of second card slots 5, each of which is defined by a second engaging surface 329 adjacent to the links 3 disposed on the left and right, the second The card slot 5 is interleaved with the first card slots 325.

In this embodiment, when the toothed chain is combined, the inner chain piece 32 of each chain link 3 is sandwiched between the outer chain pieces 31. When being disposed, the outer chain pieces 31 are aligned inside and outside, and The inner chain piece 32 is interlaced with the outer chain piece 31, and one of the inner chain holes 322 of the inner chain piece 32 corresponds to the inner and outer outer holes 313 of the outer chain piece 31, and the second chain axis 33 passing through the corresponding outer chain holes 313 and the inner chain holes 322, the two adjacent links 3 are connected in series by the first chain shafts 4, and the toothed chains can be connected in series A closed loop shape is formed and is engageable with the sprocket 21 of the sprocket 2.

In operation, since the thickness 320 of the inner link 32 of each link 3 is approximately 2.5 to 3.5 times the thickness 310 of each outer link 31, and the outer links 31 of each link 3 There is also only a single inner chain piece 32 therebetween, so that when the toothed chain is subjected to a pulling force on the opposite side, each inner chain piece 32 corresponds to the first chain axis 4 or the second chain axis. The force-receiving area between the 33 is large, and the force is intact and average. Therefore, the present embodiment can disperse the pulling force during operation, and the first chain shaft 4 and the second chain shaft 33 are easily worn during use. The problem.

When the embodiment is engaged, the first engaging surface 326 of each of the links 3 and the second engaging surfaces 329 are directed toward the sprocket 2, and each of the sprocket teeth 21 of the sprocket 2 can be rotated. And extending into one of the first card slots 325 and the second card slots 5. Since each of the first slots 325 is formed by the first engaging surface 326 of each of the inner links 32, and each of the second slots 5 is formed by the second of the adjacent inner links 32 The engaging faces 329 are defined together, and the thickness 320 of the inner chain piece 32 is 2.5 to 3.5 times the thickness 310 of the outer chain pieces 31. Therefore, when each of the fastener elements 21 is engaged with the corresponding first In the card slot 325, the first engaging surface 326 of the thickness expansion can be firmly resisted. Similarly, when each of the sprocket teeth 21 is engaged in the corresponding second card slot 5, the thickness can be expanded. The second engaging faces 329 are firmly abutted, so the present invention also has the effect of improving the fastening stability.

In addition, in this embodiment, each link 3 has only two outer chain pieces 31, one inner chain piece 32 and one second chain shaft 33, that is, only four elements are required, which can not only simplify the components. It also has the advantages of less assembly process and convenient assembly. The outer oil hole 314 and the inner oil hole 323 provided on each outer chain piece 31 and each inner chain piece 32 of the present invention are convenient to add lubricating oil from the side of the toothed chain, and improve the lubricating oil. In addition to the fluidity, it also has the effect of storing lubricating oil and reducing weight. The guide inclined portion 319 provided on each outer chain piece 31 of the present invention can also improve the engagement of the toothed chain with the sprocket 2 Smoothness. Therefore, the first embodiment of the present invention is indeed a toothed chain which is stable in engagement, has few assembly processes, and operates smoothly.

Referring to Fig. 8, the second embodiment of the present novel toothed chain has a configuration similar to that of the first embodiment except that the thickness 320 of each inner link piece 32 of the first embodiment and each outer link piece are different. The ratio of the thickness 310 of 31 is 3:1, and such a chain is suitable for replacing the five-piece toothed chain as conventionally known in FIG. In the toothed chain of the second embodiment of the present embodiment, the ratio of the thickness 320 of each inner chain piece 32 to the thickness 310 of each outer chain piece 31 is 2.5:1, and the toothed chain is suitable for replacing FIG. A conventional seven-piece toothed chain. Referring again to Figure 9, a third embodiment of the present toothed chain is constructed similarly to the first embodiment, except that the thickness 320 of each inner link 32 and the thickness 310 of each outer link 31 are The ratio is 3.5:1, and such a toothed chain is suitable for replacing the nine-piece toothed chain as conventionally known in FIG. In addition to increasing the thickness of the inner chain pieces 32, the foregoing embodiments increase the thickness of the outer chain pieces 31 in order to increase the strength of the outer chain pieces 31 and to prevent cracking when the force is excessive.

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.

2‧‧‧Sprocket
21‧‧‧ sprocket
3‧‧‧ link
31‧‧‧Outer link
310‧‧‧ thickness
311‧‧‧ first surface
312‧‧‧ second surface
313‧‧‧Outer chain hole
314‧‧‧ outer oil hole
315‧‧‧Outer end face
316‧‧‧ arc concave
317‧‧‧Outer hole connection
318‧‧‧First distance
319‧‧‧ Guided slope
32‧‧‧Internal link
320‧‧‧ thickness
321‧‧‧ side
322‧‧‧Internal chain hole
323‧‧‧ oil hole
324‧‧‧ inside end
325‧‧‧ first card slot
326‧‧‧First mating surface
327‧‧‧ hole connection
328‧‧‧Second distance
329‧‧‧Second mating surface
33‧‧‧Second chain shaft
4‧‧‧First chain shaft
5‧‧‧Second card slot

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is an intricate front exploded view of a conventional five-piece toothed chain; 1 is a partial cross-sectional view of the conventional toothed chain; FIG. 3 is a partial cross-sectional view of a conventional seven-piece toothed chain; FIG. 4 is a partial cross-sectional view of a conventional nine-piece toothed chain; An incomplete partial cross-sectional view of a first embodiment of the novel toothed chain; FIG. 6 is a reference view of the use state of the first embodiment, illustrating the relationship between the toothed chain and a sprocket; 1 is an exploded perspective view of a first embodiment of the toothed chain; FIG. 8 is an incomplete partial cross-sectional view of a second embodiment of the present toothed chain; and FIG. An incomplete partial cross-sectional view of a third embodiment of a chain.

3‧‧‧ link

31‧‧‧Outer link

310‧‧‧ thickness

311‧‧‧ first surface

312‧‧‧ second surface

313‧‧‧Outer chain hole

314‧‧‧ outer oil hole

320‧‧‧ thickness

321‧‧‧ side

322‧‧‧Internal chain hole

323‧‧‧ oil hole

324‧‧‧ inside end

325‧‧‧ first card slot

326‧‧‧First mating surface

315‧‧‧Outer end face

316‧‧‧ arc concave

319‧‧‧ Guided slope

32‧‧‧Internal link

329‧‧‧Second mating surface

33‧‧‧Second chain shaft

4‧‧‧First chain shaft

Claims (6)

A toothed chain engages with a sprocket having a plurality of sprocket wheels, and the sprocket chain includes a plurality of links arranged along a length direction, and a plurality of links are respectively connected in series a first chain axis of two adjacent ones; each link has two outer chain pieces spaced apart, one inner chain piece between the outer chain pieces, and one piece connected in series The outer chain piece and the second chain shaft of the inner chain piece, each outer chain piece has two outer chain holes respectively for the corresponding first chain shaft and the second chain shaft, and one outer chain hole Far from the outer end surface of the sprocket, and the thickness of the inner chain piece is 2.5 to 3.5 times the thickness of each outer chain piece, the inner chain piece has a first one adjacent to the sprocket and defining a first card slot An engaging surface, two inner chain holes respectively for the corresponding first chain shaft and the second chain shaft, and an inner end surface away from the sprocket, the inner chain holes having a center through The inner hole is connected, and the outer chain hole has a line connecting the outer hole through the center, and the outer end surface is connected between the outer hole and the outer hole A first distance is equal to a second distance between the inner end surface and the inner hole connection. The toothed chain of claim 1, wherein the inner link of each link further has two inner and outer spaced sides, and two second engaging faces connected between the sides, the first The two engaging surfaces are respectively located on opposite sides of the first card slot, and the toothed chain further comprises a plurality of second card slots formed by the adjacent second engaging faces adjacent to the adjacent links. The two card slots are staggered with the first card slots. The toothed chain of claim 2, wherein the outer link of each link further has a first surface facing the inner link, a second surface spaced from the first surface, and a second surface An outer oil hole penetrating the first surface and the second surface, and the outer chain holes also penetrate the first surface and the second surface, and the outer oil hole is interposed between the outer chain holes. The toothed chain of claim 3, wherein the outer link of each link further has an arc concave surface connected between the first surface and the second surface, the arc concave surface being adjacent to the chain a wheel, and the first surface has a guide portion disposed along the concave surface of the arc. The toothed chain of claim 2, wherein the inner chain of each link further has an inner oil hole extending through the sides, the inner chain hole also penetrating the sides, and the inner oil The holes are between the inner chain holes. The toothed chain according to any one of claims 1 to 5, wherein the thickness of the inner link of each link is 3.0 times the thickness of each outer link.