TWM568922U - Oil seal chain - Google Patents

Abstract

An oil-like chain comprising a plurality of inner series units, and a plurality of outer series units connected in series with the inner series unit, each inner series unit comprising two inner links and two tandem joints The inner chain piece bushing, each inner chain piece has an outer surface, and each bushing has two inner protruding portions respectively protruding from the outer surface of the inner side piece of the same side, each outer series connection The unit comprises two outer chain pieces, and two chain shafts respectively passing through the corresponding bushings and serially connecting the outer chain pieces, each outer chain piece has a body part, and two adjacent sides The inner chain piece protrudes from the outer protruding portion, and each outer protruding portion surrounds the outer circumference of the corresponding inner protruding portion. The foregoing structure can form two barriers without adding additional components to improve the barrier effect.

Description

Oil seal chain

The present invention relates to a chain belt for transmission, and more particularly to an oil-like chain which can produce an oil seal function.

The conventional chain is generally designed to include a plurality of inner splicing units spaced along a length direction, and a plurality of outer splicing units serially connecting the two adjacent two adjacent contiguous units, each inner splicing unit Each has two spaced inner links, each outer serial unit has two outer links respectively located outside the inner links, and the inner serial units and the outer strings are connected in series The connecting unit must be relatively pivoted. In order to improve the smooth running of the chain, lubricating grease is usually added to each pivoting portion of the chain, and an oil seal is respectively disposed between each inner chain piece and the corresponding outer chain piece. To prevent extravasation of lubricating grease.

A chain having the oil seal is known, although the speed of grease loss can be slowed down by installing the oil seal, and external dust is blocked from entering the pivoting portion, since each oil seal is sandwiched in the corresponding Between the inner link piece and the outer link piece, the relative pivotal resistance between each other is increased. In addition, in the manufacture of the conventional chain, it is necessary to additionally install the oil seal between each inner chain piece and the corresponding outer chain piece, and this structure also increases the assembly process.

Accordingly, it is an object of the present invention to provide an oil-like chain that can improve at least one of the disadvantages of the prior art.

Thus, the oil seal chain of the present invention comprises a plurality of inner tandem units, and a plurality of outer tandem units of the inner tandem units adjacent to each other, each inner concatenation unit comprising two spaced apart An inner chain piece, and two bushings serially connected to the inner chain pieces, each inner chain piece has an outer surface, and each bushing has two outer surfaces of the inner chain piece respectively protruding from the same side The inner protruding portion, each outer series unit includes two outer chain pieces, and two chain shafts respectively passing through the corresponding bushings and serially connecting the outer chain pieces, each outer chain piece has a body portion, and two outer protruding portions protruding from the body portion to the corresponding inner chain piece, each outer protruding portion respectively surrounding an outer circumference of the corresponding inner protruding portion.

The utility model has the advantages that: each outer protruding portion protrudes to the corresponding inner chain piece, and each outer protruding portion respectively surrounds the outer circumference of the corresponding inner protruding portion, except that no additional oil seal is needed, Two barriers can be formed to prevent extraneous grease from leaking inside, while avoiding external dust entering the pivoting portion of the chain.

Referring to Figures 1, 2, and 3, a first embodiment of the novel oil-sealing chain can be formed in a loop shape by a joint group not shown in the drawings, and includes a plurality of inner portions spaced along a length direction 11 The serial connection unit 2 and the plurality of outer serial connection units 3 of the adjacent inner serial connection unit 2 are respectively connected in series.

Each of the inner series units 2 includes two inner chain pieces 21, two bushings 22 connected in series with the inner chain pieces 21, and two chain rollers 23 respectively coaxially wound around the outer circumference of the bushings 22, The inner chain pieces 21 are spaced apart in parallel along a spacing direction 12 which is perpendicular to the length direction 11. Each inner chain piece 21 has an outer surface 211, an inner surface 212 parallel to the outer surface 211, and two inner perforations 213 extending through the outer surface 211 and the inner surface 212. The bushing 22 is coupled in series with the inner chain pieces 21, each bushing 22 defining an axial passage 221 and having two inner surfaces 211 of the inner chain piece 21 respectively protruding from the same side. The protruding portion 222, and a joint portion 223 connected between the inner protruding portions 222 and tightly fitted between the coaxial inner holes 213. The chain roller 23 is rotatably sleeved around the outer circumference of the corresponding bushing 22 and interposed between the inner chain pieces 21.

Referring to Figures 1, 3 and 4, each outer series unit 3 includes two outer chain pieces 31 parallel along the spacing direction 12, and two of the outer chain pieces 31 are connected in series and connected in series with one of them. The chain shaft 32 of the unit 2 is connected, and each outer chain piece 31 has a flat body portion 311 having an inner side surface 312 and an outer side surface parallel to the inner side surface 312 along the spacing direction 12. 313, and two outer perforations 314 extending through the inner side 312 and the outer side 313.

Each of the outer chain pieces 31 further has an outer protruding portion 315 protruding from the inner side surface 312 toward one of the inner chain pieces 21, and a concave recessed by the outer side surface 313 and corresponding to the inner and outer portions of the outer protruding portion 315. The groove 317, the cross-sectional shape of the outer protruding portion 315 is not particularly limited, and may be a hollow ring shape as disclosed in the embodiment, or may be other shapes, and each outer protruding portion 315 is corresponding to each other. A center line of the outer perforation 314 surrounds and cooperates with a partial area of the inner side 312 of the body portion 311 to define a ring groove into which the inner protruding portion 222 of the corresponding bushing 22 extends. 316. Each of the chain shafts 32 has two rivet portions 321 protruding from the outer chain piece 31, and an outer perforation 314 and the bushing interposed between the staking portions 321 and passing through the axial direction. The shafting portion 322 of the axial passage 221 of 22.

In this embodiment, after the chain is assembled, the outer protruding portion 315 of each outer chain piece 31 protrudes toward the outer surface 211 of the corresponding inner chain piece 21 to form a first track blocking structure, each The inner protruding portion 222 of the bushing 22 protrudes into the annular groove 316 of the corresponding outer chain piece 31, so that a blocking structure of the second track is formed. Therefore, when lubricating grease is applied to the inner annular surface of the axial passage 221 of each bushing 22 and the outer annular surface of each of the chain shafts 32, that is, each pivoting portion of the chain, the lubricating grease is not It is easy to pass over each inner protruding portion 222 and the outer protruding portion 315 surrounding the outer periphery of the inner protruding portion 222, so that the present embodiment can prevent the grease from being extravasated without the need to install an oil seal. On the other hand, the external dust does not easily enter the corresponding ring groove 316 through each of the outer protruding portions 315, and finally passes through the corresponding inner protruding portion 222, so that the inner and outer two-layer blocking structures also have the function of blocking dust. Enter the effect. At the same time, the axial flexibility of the chain can also be reduced.

In addition, the inner protruding portion 222 and the outer protruding portion 315 provided in the embodiment have a better blocking and sealing effect, and each outer protruding portion 315 protrudes toward the corresponding inner chain piece 21. The structure can also utilize the tolerances of the assembly to minimize the distance between each inner chain piece 21 and the outer protruding portion 315 of the corresponding outer chain piece 31, that is, when the chain is in a normal state. In the operating state, the outer protruding portion 315 of each outer chain piece 31 is closer to the outer surface 211 of the inner chain piece 21 than the inner side surface 312, but the outer protruding portion 315 is annular. The area is smaller than the area of the inner side surface 312 of each outer chain piece 31, so that there is no direct contact friction between each inner chain piece 21 and the corresponding outer chain piece 31, so the frictional resistance is rather low. It does not affect the smoothness of the chain during operation. However, the conventional chain is to sandwich the oil seal between each inner chain piece and the corresponding outer chain piece, and directly interfere with each other. Therefore, the present embodiment can be avoided as compared with the conventional oil seal chain. In addition to the loss of lubricating oil and the ingress of dirt, it also has the effect of reducing frictional resistance.

Referring to FIG. 5, a second embodiment of the novel oil seal chain also includes a plurality of inner tandem units 2 and a plurality of outer tandem units 3, and the internal tandem unit 2 has the same structure as the first embodiment. Each of the outer series units 3 also has the outer chain pieces 31 and the chain shafts 32. The second embodiment of the present invention differs from the first embodiment in that the two methods are different, wherein the Each outer chain piece 31 of an embodiment has two recesses 317 respectively corresponding to the inner and outer portions of the outer protruding portions 315. The outer side surface 313 of each outer chain piece 31 of the second embodiment has a flat shape.

Referring to Figures 6 and 7, the structure of a third embodiment of the novel chain is similar to that of the first embodiment, except that the outer chain piece 31 of each outer series unit 3, i.e., each outer link piece The main body portion 311, the peripheral protrusion 315 integrally protruding from the main body portion 311, and the groove 317 corresponding to the inner and outer portions of the peripheral protrusions 315, respectively, the third embodiment and the third An embodiment differs in that each of the peripheral projections 315 has an arcuate annular surface 318 facing the inner tandem unit 2, each recess 317 having a form-fitting arcuate annular surface 319. The foregoing structure is advantageous in production and manufacture in addition to the effects described in the first embodiment.

In summary, in addition to the novel structure, the chain of the present invention does not require an additional oil seal during assembly, thereby producing a better barrier and sealing effect, so that the chain can maintain better running smoothness for a long time, and also The axial flexibility of the chain can be reduced. And because the outer protruding portion 315 of each outer chain piece 31 of the present invention is directed toward the corresponding inner chain piece 21, the outer protruding portion of each outer chain piece 31 is used with a tolerance between the two. 315 and the corresponding inner chain piece 21 do not directly contact the friction structure, and when the outer serial connection unit 3 and the inner serial connection unit 2 are relatively rotated, each outer chain piece 31 and the corresponding one are also avoided. The inner chain piece 21 generates intense friction, so the present invention also has the effect of reducing frictional resistance.

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.

11‧‧‧ Length direction

12‧‧‧ interval direction

2‧‧‧Inline connection unit

21‧‧‧Internal link

211‧‧‧ outer surface

212‧‧‧ inner surface

213‧‧‧Perforated

22‧‧‧ bushing

221‧‧‧Axial channel

222‧‧‧Inside breakout

223‧‧‧Combination Department

23‧‧‧Chain Roller

3‧‧‧External unit

31‧‧‧Outer link

311‧‧‧ Body Department

312‧‧‧ inside

313‧‧‧Outside

314‧‧‧outer perforation

315‧‧‧Outer spur

316‧‧‧ Ring groove

317‧‧‧ Groove

318‧‧‧Arc convex torus

319‧‧‧ arc concave torus

32‧‧‧Chain

321‧‧‧ Riveting Department

322‧‧‧wear shaft

Other features and advantages of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a partial cross-sectional view of an incomplete combination of a first embodiment of the present invention; An incomplete side view of an embodiment; FIG. 3 is a cross-sectional exploded view of the first embodiment illustrating the relative relationship of two inner series units and one outer series unit of the chain; A perspective view of the first embodiment, an outer chain piece of the outer series unit is separately illustrated; FIG. 5 is a cross-sectional exploded view of a second embodiment of the chain, illustrating the inner series unit of the chain And FIG. 6 is a perspective view of a third embodiment of the chain of the present invention, the outer chain of the chain is separately illustrated; and FIG. 7 is a cross-sectional exploded view of the third embodiment, illustrating The inner series unit of the chain and the outer series unit.

Claims (8)

An oil-like chain includes: a plurality of inner series units, each inner series unit includes two spaced inner links, and two bushings serially connected to the inner links, each inner link Having an outer surface, each bushing has two inner protruding portions respectively protruding from the outer surface of the inner chain piece; and a plurality of outer series connecting units respectively adjacent to the adjacent inner series a unit, each outer series unit includes two outer chain pieces, and two chain shafts respectively passing through the corresponding bushings and serially connecting the outer chain pieces, each outer chain piece having a body part And two outer protruding portions protruding from the body portion to the corresponding inner chain piece, each outer protruding portion surrounding the outer circumference of the corresponding inner protruding portion. The oil-sealing chain of claim 1, wherein each of the outer protruding portions is coaxially disposed with the corresponding inner protruding portion and surrounds one of the chain shafts in a hollow loop shape. The oil-sealing chain of claim 2, wherein the body portion of each outer chain piece has an inner side surface facing the outer surface of the corresponding inner chain piece, and an outer side surface spaced from the inner side surface. And two outer perforations extending through the inner side surface and the outer side surface for the corresponding chain shaft, and each outer protruding portion cooperates with the body portion to define a ring groove, each bushing The inner protruding portions respectively extend into the corresponding annular grooves. The oil-sealing chain of claim 3, wherein each inner link further has an inner surface spaced from the outer surface, and two inner perforations extending through the outer surface and the inner surface, each bushing Defining an axial passage through which the corresponding chain shaft passes, and each bushing further has a connection between the inner protruding portions and tightly fitting between the coaxially corresponding inner perforations The junction. The oil-sealing chain of claim 4, wherein each of the inner series units further comprises two chain rollers respectively threaded around the outer circumference of the bushings, the chain rollers being rotatably interposed between the inner chains Between the films. The oil-sealing chain of claim 3, wherein each of the outer chain sheets further has a recess recessed from the outer side surface and corresponding to the inner and outer portions of the outer protruding portion. The oil-sealing chain of claim 6, wherein the outer protruding portion of each outer chain has an arcuate annular surface facing the inner tandem unit, the groove of each outer chain Both have a form-fitting arcuate torus. The oil-sealing chain of claim 3, wherein the outer protruding portion of each outer chain has an arcuate annular surface facing the inner tandem unit.