TWI789792B - Oil seal chain - Google Patents

Abstract

An oil seal chain, comprising a plurality of inner chain units, a plurality of outer chain units, a chain shaft unit, and at least one oil seal ring. Each inner chain piece unit includes two opposite inner pieces, and each inner piece has two inner perforations and at least one inner groove with a V-shaped cross section. Each outer chain piece unit includes two opposite outer pieces, and each outer piece has two outer perforations and at least one outer groove with a V-shaped cross section. The at least one outer groove and the at least one inner groove of the adjacent inner sheet define an annular accommodating space for accommodating the at least one oil seal ring. With the arrangement of the at least one accommodation space, not only can the friction force between the oil seal ring and the inner chain units and the outer chain units be reduced, but also the oil seal ring can be prevented from being squeezed to cause Deformation to improve the smoothness of the chain operation.

Description

Oil seal chain

The invention relates to a chain used for transmission, in particular to an oil-sealed chain.

A known oil seal chain, comprising a plurality of inner sheet units and a plurality of outer sheet units arranged at intervals along a transmission direction, a plurality of pin shafts interposed between the inner sheet units and the outer sheet units, and Multiple oil seal rings. The outer sheet units are located outside the inner sheet units. Each oil seal ring is arranged on the outer periphery of one of the pin shafts, and is sandwiched between the corresponding inner piece unit and the outer piece unit, and seals lubricating oil in the corresponding pin shaft, the inner piece unit, and the outer piece unit. The chip unit and the oil seal ring are used to lubricate the chain, reduce vibration and noise, and prevent dust or rainwater from entering.

However, the oil seal chain fixes the oil seal rings by pressurizing the inner sheet units and the outer sheet units, so there is a gap between the inner sheet units, the outer sheet units and the oil seal rings. There will be greater resistance, and under the long-term action of pressure, it is easy to deform or damage the oil seal rings.

Therefore, the object of the present invention is to provide an oil seal chain which at least overcomes the disadvantages of the prior art.

Therefore, the oil seal chain of the present invention includes a plurality of inner chain plate units, a plurality of outer chain plate units, a chain shaft unit, and at least one oil seal ring.

The inner chain units are arranged at intervals along a running direction, and each inner chain unit includes two oppositely arranged inner plates, each inner plate has two inner perforations, and is provided with at least one inner perforation surrounding one of them And for the inner groove located on the outer surface of the inner sheet, the cross-section of the at least one inner groove is V-shaped.

The outer chain sheet units are arranged at intervals along the running direction, each outer chain sheet unit is arranged on the outside of two adjacent inner chain sheet units, and includes two oppositely arranged outer sheets, each outer sheet has two The outer perforation is provided with at least one outer groove surrounding one of the outer perforations and located on the inner surface of the outer sheet. The inner grooves jointly define an annular containing space.

The chain shaft unit has a plurality of pin shafts passing through the inner holes of the inner sheets and the outer holes of the outer sheets. The at least one oil sealing ring is arranged in the at least one containing space and surrounds the outer periphery of the corresponding pin shaft.

The effect of the present invention is that by placing the at least one oil seal ring in the at least one accommodation space, not only can the friction between the oil seal ring and the inner chain units and the outer chain units be reduced , and avoid deformation of the oil seal ring due to being squeezed, and increase the space for accommodating lubricating oil to improve the smoothness of the chain operation.

Referring to FIGS. 1-4 , an embodiment of the oil seal chain of the present invention includes a plurality of inner chain units 2 , a plurality of outer chain units 3 , a chain shaft unit 4 , and a plurality of oil seal rings 5 .

The inner link units 2 are arranged at intervals along a running direction R, and each inner link unit 2 includes two opposite inner plates 21 . Each inner sheet 21 has two inner perforations 201, and is provided with two inner grooves 202 respectively surrounding the inner perforations 201 and positioned on the outer side 215 of the inner sheet 21. The depth of the inner grooves 202 is the 10%~25% of the thickness of the inner sheet 21. Preferably, the depth of the inner groove 202 is 13%-21.5% of the thickness of the inner sheet 21 . The section of each inner groove 202 is V-shaped, and has a first inner bevel 211 and a second inner bevel 212, the connection between the first inner bevel 211 and the second inner bevel 212 forms an inner top corner 214. The cross section of the inner top corner portion 214 is a sharp corner. The first inner slope 211 and the second inner slope 212 form an inner angle 213 , and the inner angle 213 is between 90°˜170°. Preferably, the inner angle 213 is between 120°-146°.

The outer link units 3 are arranged at intervals along the running direction R, and each outer link unit 3 includes two opposite outer plates 31 . Each outer sheet 31 has two outer perforations 301, and is provided with two outer grooves 302 respectively surrounding the outer perforations 301 and positioned on the inner side 315 of the outer sheet 31, the depth of the outer grooves 302 being the 10%~25% of the thickness of the outer sheet 31. Preferably, the depth of the outer groove 302 is 13%-21.5% of the thickness of the outer sheet 31 . The cross section of each inner groove 202 is V-shaped, and has a first outer bevel 311 and a second outer bevel 312, and the junction of the first outer bevel 311 and the second outer bevel 312 forms an outer corner. 314. The cross-section of the outer corner portion 314 is a sharp corner. The first outer slope 311 and the second outer slope 312 form an outer angle 313 , and the outer angle 313 is between 90°˜170°. Preferably, the outer angle 313 is between 120°-146°.

Each outer groove 302 of each outer sheet 31 and one of the inner grooves 202 of the adjacent inner sheet 21 jointly define an annular accommodation space 101, and the accommodation spaces 101 are used to accommodate the Oil seal ring 5. Each oil sealing ring 5 is in fit contact with the first inner slope 211 and the second inner slope 212 forming the corresponding inner groove 202 , and does not contact the corresponding inner top corner 214 . Each oil seal ring 5 is in fit contact with the first outer slope 311 and the second outer slope 312 forming the corresponding outer groove 302 , and does not contact the corresponding outer top corner 314 . The fitting contact refers to each oil seal ring 5 and the first inner bevel 211 and the second inner bevel 212 forming the corresponding inner groove 202, and the first outer bevel forming the corresponding outer groove 302. The inclined surface 311 is in contact with the second outer inclined surface 312 in a fit manner.

The chain shaft unit 4 includes a plurality of pins 41 , a plurality of bushes 42 , and a plurality of rollers 43 . The pin shafts 41 are rotatably passed through the inner holes 201 of the inner sheets 21 , and are closely fitted and fixed to the outer holes 301 of the outer sheets 31 . The bushings 42 are respectively arranged on the outer circumference of the pin shafts 41, and are fixed in the inner perforations 201 of the two oppositely arranged inner sheets 21, and the rollers 43 are sleeved in the bushings respectively. 42, and between the two inner sheets 21 which are arranged oppositely.

Each oil seal ring 5 surrounds the outer periphery of the corresponding bushing 42, and defines with the corresponding bushing 42, the pin shaft 41, and the outer sheet 31 a space for accommodating lubricating oil (not shown). The oil seal space 102, under the action of the oil seal ring 5, the lubricating oil can be confined between the inner sheets 21 and the outer sheets 31, and the pin shafts 41 and the bushings 42, and Will not leak. And by setting the oil seal rings 5 in the ring-shaped accommodation spaces 101 respectively, and making the oil seal rings 5 fit and contact the inner sheets 21 and the outer sheets 31 without contacting The inner corners 214 and the outer corners 314 can not only reduce the friction between the oil seal rings 5 and the inner chain units 2 and the outer chain units 3, but also avoid the The oil seal ring 5 is squeezed and deformed, and the oil seal space 102 for accommodating lubricating oil can be increased to improve the smoothness of the chain operation.

It should be noted that the section of each inner corner 214 and the section of each outer corner 314 in this embodiment are sharp angles, but this is not limited in other embodiments of the present invention, as long as the It is enough that the oil seal ring 5 does not contact the inner corners 214 and the outer corners 314. Referring to FIG. 5, for example, the cross section of each inner corner 214 and the cross section of each outer corner 314 are circular horn.

In this embodiment, each inner sheet 21 is provided with two inner grooves 202 surrounding the inner perforations 201 respectively, and each outer sheet 31 is provided with two outer grooves 302 respectively surrounding the outer perforations 301 , but it is not limited thereto in other embodiments of the present invention. For example, each inner sheet 21 may only be provided with an inner groove 202 surrounding one of the inner perforations 201, or each outer sheet 31 may also only have An outer groove 302 surrounding one of the outer through holes 301 is provided.

To sum up, the oil seal chain of the present invention can confine the lubricating oil between the inner pieces 21 and the outer pieces 31 by arranging the oil seal rings 5 in the ring-shaped accommodation spaces 101 respectively. without leakage, and by allowing the oil seal rings 5 to fit and contact the inner sheets 21 and the outer sheets 31 without contacting the inner top corners 214 and the outer top corners 314, not only It can reduce the friction force when the chain is running, avoid the deformation of the oil seal rings 5 by being squeezed, and increase the oil seal space 102 for accommodating the lubricating oil. It is an oil seal chain with multiple advantages.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

101: Storage space 102: oil seal space 2: Inner chain unit 201: inner perforation 202: inner groove 21: inner piece 211: the first inner bevel 212: second inner bevel 213: Inner Angle 214: inner top corner 215: Outer side 3: Outer chain piece unit 301: Outer perforation 302: Outer Groove 31: Outer piece 311: the first outer bevel 312: second outer bevel 313: Outer angle 314: Outer top corner 315: inner side 4: chain shaft unit 41:pin shaft 42: Bushing 43: Roller 5: Oil seal ring R: running direction

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a sectional view of one embodiment of the oil seal chain of the present invention; Fig. 2 is a perspective view of one of the inner sheet of this embodiment; Fig. 3 is a perspective view of an outer sheet of this embodiment; Fig. 4 is a partially enlarged view of Fig. 2, illustrating one of the ring-shaped accommodation spaces of this embodiment; and Fig. 5 is another implementation of the annular accommodation space of the embodiment.

101: Storage space 102: oil seal space 2: Inner chain unit 201: inner perforation 202: inner groove 21: inner piece 211: the first inner bevel 212: The second inner oblique piece 214: inner top corner 215: Outer side 3: Outer chain piece unit 301: Outer perforation 302: Outer Groove 31: Outer piece 311: the first outer bevel 312: second outer bevel 314: Outer top corner 315: inner side 4: chain shaft unit 41:pin shaft 42: Bushing 43: Roller 5: Oil seal ring R: running direction

Claims (9)

An oil seal chain, comprising: a plurality of inner chain unit, arranged at intervals along a running direction, each inner chain unit includes two oppositely arranged inner plates, each inner plate has two inner perforations, and is provided with at least one Surrounding one of the inner perforations and the inner groove located on the outer side of the inner sheet, the cross-section of the at least one inner groove is V-shaped, and the at least one inner groove has a corresponding first inner slope and a The second inner bevel, the junction of the first inner bevel and the second inner bevel forming the at least one inner groove forms an inner top corner, and the at least one outer groove has a corresponding first outer bevel and the second inner bevel. A second outer bevel, forming an outer top corner at the junction of the first outer bevel and the second outer bevel forming the at least one outer groove; a plurality of outer chain sheet units are arranged at intervals along the running direction, each An outer chain piece unit is arranged on the outer side of two adjacent inner chain piece units, and includes two oppositely arranged outer pieces, each outer piece has two outer perforations, and is provided with at least one surrounding one of the outer pieces. The outer groove is perforated and located on the inner side of the outer sheet, the cross-section of the at least one outer groove is V-shaped, and defines an annular containing space together with the at least one inner groove of the adjacent inner sheet; A chain shaft unit, including a plurality of pins passing through the inner holes of the inner sheets and the outer holes of the outer sheets; and at least one oil seal ring, which is arranged in the containing space and surrounds the corresponding Around the outer periphery of the pin shaft, the at least one oil seal ring does not contact the inner top corner or the outer top corner. The oil seal chain according to claim 1, wherein, the first inner slope of the at least one inner groove forms an inner angle with the second inner slope, and the inner angle is between 90°-170°, the first outer slope of the at least one outer groove forms an outer angle with the second outer slope, and the outer angle is between 90°-170°. The oil seal chain according to claim 2, wherein the inner angle is between 120°-146°, and the outer angle is between 120°-146°. The oil seal chain according to claim 2, wherein, the section of the at least one oil seal ring is circular, and forms the first inner slope corresponding to the inner groove and the second inner slope, and forms the corresponding inner groove. The first outer slope of the outer groove fits in contact with the second outer slope. The oil seal chain according to claim 4, wherein the cross-sections of each inner top corner and each outer top corner are rounded. The oil seal chain according to claim 4, wherein the cross-sections of each inner top corner and each outer top corner are sharp corners. The oil seal chain according to claim 1, wherein the depth of the at least one inner groove is 10% to 25% of the thickness of each inner sheet, and the depth of the at least one outer groove is 10% to 25% of the thickness of each outer sheet 10%~25%. The oil seal chain according to claim 7, wherein the depth of the at least one inner groove is 13% to 21.5% of the thickness of each inner sheet, and the depth of the at least one outer groove is 1/2 of the thickness of each outer sheet 13%~21.5%. The oil seal chain according to claim 1, wherein the chain shaft unit further includes a plurality of bushes respectively arranged on the outer circumference of the pin shafts, and each bush is fixed to the two oppositely arranged inner plates In the inner through hole, the at least one oil sealing ring surrounds the outer periphery of the bushing.

Images