CN110762165A

CN110762165A - Transmission chain

Info

Publication number: CN110762165A
Application number: CN201810832935.4A
Authority: CN
Inventors: 吴其香
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2020-02-07

Abstract

The invention provides a transmission chain, which is mainly formed by connecting a plurality of chain mesh units, wherein each chain mesh comprises an inner chain piece, an outer chain piece and a shaft pin, wherein each protruding part of the outer chain piece is at least provided with a groove, so that after one end of the shaft pin protruding out of the protruding part is extruded, the shaft pin can be partially extended to the groove to be clamped and positioned; therefore, when the transmission chain is used, the shaft pin is limited by the groove, so that the friction loss between the shaft pin and the inner and outer chain sheets caused by the rotation of the transmission chain can be avoided, the looseness and the stretching phenomenon during transmission caused by abrasion can be effectively reduced, the stress strength of the transmission chain is greatly improved, and the service life of the transmission chain is greatly prolonged.

Description

Transmission chain

Technical Field

The present invention relates to a transmission chain, and more particularly to a transmission chain with excellent transmission performance, reduced wear and improved durability.

Background

Referring to fig. 1 and 2, a conventional chain 1 is formed by connecting a plurality of chain units 11, each chain unit 11 includes two inner links 111 disposed correspondingly, a shaft sleeve 112 connected between the two inner links 111, a roller 113 sleeved outside the shaft sleeve 112, a shaft pin 114 respectively passing through the inner links 111 and the shaft sleeve 112 and protruding out of the inner links 111, and an outer link 115 pivoted outside the inner links 111 and passing through the shaft pin 114; wherein, a through hole a is disposed at the connection position of the inner link 111 for the shaft sleeve 112; in addition, the outer link 115 is provided with an opening b through which the shaft pin 114 passes.

In practice, it is found that although the outer chain link 115 is disposed on the outer chain link 115 for riveting and positioning one end of the shaft pin 114, so that the difference between the outer circumference of the shaft pin 114 and the inner circumference of the opening b is utilized to form a mutual fastening effect during the fastening process, when the chain 1 is used as a transmission power after the components of the chain are fastened, the chain 1 will be subjected to power transmission to generate a pulling force and a torsion force and apply the pulling force and the torsion force to each chain eye 11, and the pulling force and the torsion force will be completely concentrated at the position between the opening b of the outer chain link 115 and the shaft pin 114, because the shaft pin 114 and the opening b are fastened and combined, the action of resisting the pulling force and the torsion force is not enough, and a space will be formed between the opening b and the shaft pin 114 due to the pulling force and the torsion force and the like during the continuous transmission, meanwhile, the formation of the margin space will cause abrasion when the chain 1 is operated in the longitudinal direction, and the loosening will be caused by the continuous stretching and other conditions when the chain is operated in the transverse direction, so that the transmission smoothness of the chain 1 will be affected, and even the deformation will occur, which will be improved.

In addition, since the peripheries of the through hole a and the through hole b are acute angles, when the chain 1 is subjected to a large force, and the peripheries of the through hole a and the through hole b are designed to be acute angles, the stress is easily concentrated, and further the through hole a of the inner chain sheet 111 or the periphery of the through hole of the outer chain sheet 115 is broken, so that the chain 1 is damaged and cannot be used any more, the service life of the chain 1 is reduced, and improvement is needed.

Disclosure of Invention

Therefore, an object of the present invention is to provide a transmission chain, which has improved coupling between members, thereby effectively reducing the defects of abrasion and overstretching during transmission, and greatly prolonging the service life of the transmission chain.

Therefore, the invention provides a transmission chain, which is formed by connecting a plurality of chain units, wherein each chain unit comprises two inner chain pieces, two outer chain pieces and a shaft pin which are correspondingly arranged; wherein the inner chain sheets are provided with through holes; in addition, the relative position of the outer chain sheets and the through hole is provided with an opening, each opening of the outer chain sheets is provided with a protruding part which protrudes outwards, and each protruding part of at least one outer chain sheet is at least provided with a groove; moreover, a concave arc edge is formed on at least one side of the inner chain sheet and at the periphery of the perforation, so that the strength of the inner chain sheet can be effectively improved, the stress concentration on the concave arc edge of the refining strip can be reduced, the inner chain sheet is prevented from being broken around the perforation, the inner chain sheet can bear stronger pulling force, and the whole service life of the transmission chain can be effectively prolonged.

Drawings

Fig. 1 is a schematic view of a known chain.

Fig. 2 is a schematic cross-sectional view of the known chain.

FIG. 3 is a schematic diagram of a first preferred embodiment of the present invention.

FIG. 4 is a schematic view of a variation of the components of the first preferred embodiment.

FIG. 5 is a schematic diagram of a second preferred embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of a second preferred embodiment of the present invention.

FIG. 7 is a schematic view of a third preferred embodiment of the present invention.

FIG. 8 is a schematic view of a fourth preferred embodiment of the present invention.

FIG. 9 is a schematic view of a fifth preferred embodiment of the present invention.

FIG. 10 is a schematic cross-sectional view of a fifth preferred embodiment of the present invention.

FIG. 11 is a schematic view of a sixth preferred embodiment of the present invention.

Fig. 12 to 13 are partial structural changes of the fifth preferred embodiment.

Description of the symbols:

(publicly known)

1 chain

11-chain unit 111 inner chain sheet

112 shaft sleeve 113 roller

114 axle pin 115 outer link

a through hole and b open hole

(present invention)

3 drive chain

31-chain unit

311 inner chain sheet

312 outer chain sheet

313 axle pin

314 shaft sleeve

315 roller

316 middle chain sheet

A perforation

Opening of B1

B2 projection

B3 groove

C connecting hole

3111 concave arc edge

3112 bump

3121 concave cambered surface

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 3, in the first preferred embodiment of the present invention, the transmission chain 3 is formed by connecting a plurality of chain units 31, and each chain unit 31 includes two inner chain pieces 311 correspondingly disposed, an outer chain piece 312 disposed outside the inner chain pieces 311, and a shaft pin 313 penetrating the inner and

outer chain pieces

311, 312; wherein, the inner chain sheet 311 is provided with a through hole A; in addition, the outer links 312 are provided with openings B1 opposite to the through hole a for the shaft pin 313 to pass through, and each opening B1 is provided with a protrusion B2 protruding outwards, and each protrusion of at least one outer link 312 is provided with at least one groove B3, so that after one end of the shaft pin 313 protruding out of the protrusion B2 is pressed, the shaft pin 313 can extend to the groove B3 for locking and positioning, particularly, in the embodiment, each protrusion B2 of at least one outer link 312 is provided with at least one groove B3, so that when one end of the shaft pin 313 protruding out of the protrusion B2 is riveted and pressed, the groove B3 is provided to allow the material of the shaft pin 313 extending to the groove B3 for locking and positioning, and forms a mutual pivot with the outer link 312, and the other protrusion B2 is provided with one groove B2, the other protrusion B2 is not formed with the groove B3, so as to be disposed in a press-fit manner corresponding to the shaft pin 313 used for different purposes, as shown in fig. 4; of course, the two outer chain pieces 312 may have the groove B3 on the protrusions B2 for different transmission requirements, i.e. as shown in the second preferred embodiment of fig. 5 and 6, and the groove B3 may be formed on the protrusion B2 in two corresponding patterns, or in four patterns (as shown in the third and fourth preferred embodiments of fig. 7 and 8) for different pressing combinations, for example, the groove B3 on the protrusions B2 on the two outer chain pieces 312 is described below; the axle pin 313 further has a shaft sleeve 314 connected between the two inner links 311 and through which the axle pin 313 passes, and a roller 315 sleeved outside the shaft sleeve 314, and the joint of the shaft sleeve 314 can pass through the through hole a of the inner link 311.

Referring to fig. 5 and 6, during the driving operation, the driving chain 3 is driven by the power, so that each link unit 31 is influenced by the driving, such that the inner and

outer links

311, 315 and the pin 313 of each link unit are also driven by the pulling force and the twisting force in different directions during the severe pulling, or the pulling force generated by the pulling force during the linking process causes the pulling force and the twisting force to be more concentrated on the inner and

outer links

311, 315 and the pin 313 of each link unit, especially the protrusion B2 and the pin 313 which are forced to be combined with each other, at this time, since the protrusion B2 has the pivot hook design that the groove B3 can be covered when the pin 313 is riveted, the holding force between the pin 313 and the protrusion B2 can be effectively increased, so as to greatly reduce the longitudinal force applied to the driving chain 3, the abrasion between the shaft pin 313 and the protrusion B2 can be avoided, the generation of redundant clearance can be avoided, and the transmission can be influenced by the defects of excessive stretching and the like between the shaft pin 313 and the protrusion B2 when the transmission chain is transversely operated, so that the transmission chain 3 can effectively bear various torsion and tension generated in the linkage process, the smoothness of transmission use can be effectively improved, and the stress strength and the service life of the transmission chain can be improved.

Referring to fig. 9 and 10, in the fifth preferred embodiment of the present invention, each link unit 31 of the transmission chain 3 still includes two inner links 311 disposed correspondingly, an outer link 312 disposed outside the inner links 311, and a pin 313 penetrating the inner links 311 and the outer links 312, and the above structures are the same as those of the second embodiment, and will not be described in detail, in particular, in this embodiment, a concave arc edge 3111 is formed on at least one side of the inner links 311 and at the periphery of the through hole a, and a concave arc surface 3121 is formed on the outer link 312 and at the periphery of the through hole B1 and at the side opposite to the inner links 311; in addition, a protrusion 3112 is extended outwardly from the inner link 311 at the periphery of the through hole a, and the roller 315 is disposed between the protrusions 3112 of any two inner links 311; therefore, by the design of the bump 3112, the direct friction between the bump 3112 and the inner link 311 can be effectively reduced, thereby preventing the strength of the inner link 311 from being reduced due to abrasion, and making the durability of the inner link 311 better; moreover, the concave arc 3111 is disposed on the peripheral surface of the through hole a, and the concave arc 3121 is disposed on the outer chain piece 312, so as to prevent the pin 32 and the hole B1 from being pulled off, reduce the force of the pin 313 on the peripheral surfaces of the through hole a and the hole B1, and transfer the pulling force to the entire inner wall of the through hole a and the hole B1, so as to effectively increase the strength of the force applied to the inner chain piece 311 and the outer chain piece 312, prevent the through hole a of the inner chain piece 311 or the hole B1 of the outer chain piece 312 from being broken, and further effectively prolong the service life of the transmission chain 3.

Referring to fig. 11, the sixth preferred embodiment of the present invention still includes the two inner links 311, an outer link 312 disposed outside the inner links, a pin 313 penetrating the inner and

outer links

311, 312, and a plurality of middle links 316 disposed between the inner links 311; each of the middle links 316 has a connecting hole C corresponding to the through hole a of the inner link, so as to be assembled into a transmission chain 3 in the form of a slat chain, and certainly, according to different requirements, as shown in fig. 12 to 13, different numbers of grooves B3 are disposed on the protruding portion B2 of the outer links 312, so that the pivot pin 313 is limited by the groove B3, thereby preventing the transmission chain 3 from rotating and causing friction loss between the pivot pin 313 and the inner and

outer links

311, 312, and also effectively reducing looseness and tension phenomena during transmission caused by abrasion, and greatly improving the stress strength and service life of the transmission chain 3.

In summary, the transmission chain of the present invention is formed by the protrusion of the outer chain piece having the groove, so that the shaft pin can effectively form a mutual pivot hook with the outer chain piece when the shaft pin is riveted and extruded on the outer chain piece, thereby enhancing the pressing force, effectively resisting the abrasion between the shaft pin and the protrusion when the longitudinal transmission is performed, and having the defect of over-stretching when the transverse operation is performed, so as to avoid the influence on the transmission, not only effectively improving the smoothness of use, but also prolonging the service life, and thus the purpose of the present invention can be achieved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A kind of drive chain, it is formed by connecting a plurality of chain mesh units, and each chain mesh unit includes two inner links set up correspondingly, one locates the outer link in these inner links outsides, and wear to locate in this inner link, axle pin of the outer link, wherein, have perforating on these inner links, and these outer links have perforating with this perforating opposite department, can support this axle pin to wear to set up; the method is characterized in that:

each opening of the outer chain sheet is provided with a protruding part which protrudes outwards, and each protruding part of at least one outer chain sheet is provided with at least one groove, so that after one end of the shaft pin protruding out of the protruding part is extruded, the shaft pin part extends to the groove to be clamped and positioned.

2. The transmission chain of claim 1, wherein the two grooves formed on each protrusion are disposed correspondingly.

3. The drive chain of claim 1, wherein the grooves formed on each of the protrusions are arranged in four.

4. The transmission chain of claim 1, wherein the axle pin further comprises a bushing coupled between the two outer chain links for the axle pin to pass through, and a roller disposed outside the bushing and between the two inner chain links.

5. The transmission chain of claim 1, further comprising a plurality of intermediate links disposed in an overlapping manner between the two inner links, wherein each intermediate link has a connecting hole formed at a position corresponding to the through hole.

6. The drive chain of claim 1, wherein the inner link has a concave arc edge formed on at least one side thereof at the periphery of the through hole.

7. The drive chain according to claim 1, wherein a concave arc surface is formed on the outer link on a side opposite to the inner link at the opening periphery.

8. The transmission chain as claimed in claim 4, wherein a protrusion is extended outwardly from the inner link at the periphery of the pin hole, and the roller is disposed between the protrusions of any two inner links.