JP2011094660A - Transmission chain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission chain which exerts excellent fatigue strength of the chain while reducing a work load for cutting/connecting/arranging the chain to a desired chain length dimension without damaging an inner peripheral surface of a bushing and causing omission of the bushing by easy extraction/insertion of a connection pin for an outer plate. <P>SOLUTION: The transmission chain 100 includes a pin press-fitting area 131 where a pin end 130a of the connection pin 130 having the same diameter as that of a pin penetration part 130b in the bushing 120 is press-fitted to the outer plate 140, and a tapered pin area 132 continuously press-fitted to the outer plate 140 with its diameter gradually reduced from the pin press-fitting area 131. The transmission chain 100 further includes an insertion hole area 141 where a pin press-fitting hole of the outer plate 140 is fitted to the pin press-fitting area 131 of the connection pin 130 to be closer to the plate inside, and a taper hole area 142 where the pin press-fitting hole is fitted to the tapered pin area 132 of the connection pin 130 continuously from the insertion hole area 141 to be closer to the plate outside. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a roller chain, a bush chain, and the like. In particular, a shipping chain having a predetermined chain length dimension is provided by inserting / removing a connecting pin in accordance with a chain usage situation at a customer site or the like. The present invention relates to a transmission chain that is cut and knitted to a length.

As a conventional roller chain 500, as shown in FIG. 6, an inner link in which an inner plate 510 is press-fitted into the bush ends of two bushes 520 with a roller 550 rotatably fitted, and pin ends of two connecting pins 530 It is known that the outer plate 540 is press-fitted to the outer link and the outer link 540 is connected to each other, and the pin end of the connecting pin 530 is crushed against the outer surface of the outer plate 540 to prevent it from coming off. (For example, refer to Patent Document 1).
Further, as shown in FIG. 8, as a conventional roller chain 600, an inner link in which an inner plate 610 is press-fitted into bush ends of two bushes 620 with a roller 650 rotatably fitted therein and two connecting pins 630. The outer link with the outer plate 640 press-fitted to the end of the pin is connected to each other, and the pin end of the connecting pin 630 is press-fitted into the stepped shape at the press-fitted portion of the outer plate 640 to prevent it from coming off. (For example, refer to Patent Document 2).

Japanese Patent Laid-Open No. 10-184818 (Claims, FIG. 9) Japanese Utility Model Publication No. 61-139335 (claims for utility model)

  In the conventional roller chain 500 such as the former, the pin end portion of the connecting pin 530 is crushed to the outer surface of the outer plate 540 to be firmly tightened and prevented from coming off. When the prepared shipping chain is cut and knitted to the required chain length by inserting / removing the connecting pin 530 according to the usage situation of the chain at the customer site, the connecting pin 530 is forcibly removed from the outer surface of the outer plate 540. When the connecting pin 530 is excessively clamped against the outer surface of the outer plate 540, as shown in FIG. 7, the inner peripheral surface of the bush by the pin end portion of the connecting pin 530, that is, the clamping portion of the connecting pin There was a problem that the breakage of the bushing from the inner plate due to damage to the end of the bushing and the bushing end of this clamped part became troublesome

  On the other hand, in the conventional roller chain 600 such as the latter, since the pin end portion of the connecting pin 630 is reduced in a stepped shape at the press-fitted portion of the outer plate 640, a step portion is generated in the connecting pin 630, or the connecting pin There is a problem that galling is generated when the 630 and the outer plate 640 are fitted together, and a reduction in chain fatigue strength cannot be avoided.

  Therefore, the present invention solves the conventional problem, that is, the object of the present invention is to achieve a required without causing damage to the inner peripheral surface of the bushing or pulling out of the bushing by simple insertion / extraction of the connecting pin with respect to the outer plate. An object of the present invention is to provide a transmission chain that reduces the work burden of knitting and knitting to a chain length dimension and exhibits excellent chain fatigue strength.

  According to the first aspect of the present invention, the bushes are press-fitted into the bushing press-fit holes of the pair of left and right inner plates, and the connecting pins that pass through the bushings are respectively press-fitted into the pin press-fit holes of the pair of left and right outer plates. In the transmission chain that is connected and knitted endlessly in the longitudinal direction of the chain, the pin end of the connecting pin is press-fitted into the outer plate with the same diameter as the pin penetration part in the bush and the pin A tapered taper pin region continuously pressed into the outer plate while reducing the diameter from the press-fitting region, and the pin press-fitting hole of the outer plate is fitted to the pin press-fitting region of the connecting pin closer to the inner side of the plate. By including an insertion hole region and a tapered hole region that fits continuously from the insertion hole region to the tapered taper pin region of the connecting pin closer to the outside of the plate, It is obtained by solving the problems described above.

  According to a second aspect of the present invention, in addition to the configuration according to the first aspect, a pin projecting region projecting outward from the plate of the outer plate continuously to the tapered taper pin region of the connecting pin is a pin press-fitting of the connecting pin. The problem mentioned above is solved by being formed in a smaller diameter than the region.

  According to a third aspect of the present invention, in addition to the configuration according to the first or second aspect, the deformation absorbing groove that absorbs the press-fitting deformation margin of the tapered taper pin region of the connecting pin has a tapered hole region of the outer plate. Further, the above-described problems are further solved by forming the holes radially from the center of the hole.

  Therefore, the transmission chain of the present invention press-fits the bushes into the bush press-fit holes of the pair of left and right inner plates, and press-fits the connecting pins penetrating the bushes into the pin press-fit holes of the pair of left and right outer plates, respectively. By combining and knitting endlessly in the longitudinal direction of the chain, the inner plate and the outer plate can be bent and rotated relative to each other via a connecting pin to realize smooth chain driving, It is possible to achieve a unique effect such as

  That is, according to the transmission chain of the present invention according to claim 1, the pin end portion of the connecting pin has the same diameter as the pin penetrating portion in the bush, and the taper taper pin that is continuously reduced in diameter from the pin press-fit region. And the pin press-fitting hole of the outer plate has an insertion hole region closer to the inner side of the plate and a taper hole region closer to the outer side of the plate, so that the pin press-fitting region of the connecting pin and the tapered taper pin region are pinned. Since it is press-fitted and fitted in a state corresponding to the insertion hole area and the taper hole area of the press-fitting hole, the resistance in the pin axial direction that tends to occur when connecting and disconnecting the connecting pin is reduced, and the outer By simply inserting / removing the connecting pin to / from the plate and bushing, damage to the inner peripheral surface of the bushing due to the tightening part of the connecting pin, and internal push due to galling of the bushing end of the tightening part Without causing a missing bushing from the over door, it is possible to reduce the work burden of the joint organization cut to the desired chain length.

  In particular, the pin end of the connecting pin has the same diameter as the pin penetration part in the bush and has a pin press-fitting area that is press-fitted into the outer plate, and the pin press-fitting hole of the outer plate is closer to the pin press-fitting area of the connecting pin. With the insertion hole area that fits in, the pin press-fitting area of the connecting pin fits smoothly with the pin penetration part in the bush near the inside of the plate to the insertion hole area of the pin press-fitting hole. Since the pin end of the connecting pin does not generate a crack called galling that tends to occur in a roller chain whose diameter is reduced stepwise at the press-fitting portion of the outer plate, excellent chain fatigue strength can be exhibited.

   Further, the pin end portion of the connecting pin has a tapered taper pin region that is continuous while reducing the diameter from the pin press-fitting region, and the pin press-fitting hole of the outer plate has a taper hole region closer to the outer side of the plate. When connecting, the tapered taper pin area of the connecting pin exerts a wedge function against the tapered hole area of the outer plate, reducing the insertion / removal force in the pin axis direction, so that the connecting / removing operation of the connecting pin with respect to the outer plate can be easily achieved. can do.

   According to the transmission chain of the present invention according to claim 2, in addition to the effect produced by the transmission chain according to claim 1, it projects to the outside of the plate of the outer plate continuously to the tapered taper pin region of the connecting pin. Since the pin protrusion area is smaller in diameter than the pin press-fitting area of the connection pin, the force required to insert and remove the connection pin is concentrated in the pin protrusion area. Furthermore, since the projecting region of the connecting pin protrudes in a state where it is exposed to the outside of the plate of the outer plate, the operation of inserting / removing the connecting pin with respect to the outer plate can be easily achieved.

  Furthermore, according to the transmission chain of the present invention according to claim 3, in addition to the effect exerted by the transmission chain according to claim 1 or 2, the deformation that absorbs the press-fit deformation margin of the tapered taper pin region of the connecting pin Since the absorption grooves are formed radially from the hole center in the tapered hole region of the outer plate, the deformation absorption groove on the outer plate side is tapered when the connection pin is press-fitted into the pin press-fitting hole of the outer plate. In order to absorb the crushed press-fitting deformation margin of the taper pin region and assist plastic deformation on the connecting pin side, a strong press-fitting is achieved, and the connecting pin is inserted into the pin press-fitting hole of the outer plate at the cut-off portion. It can be reliably prevented from rotating.

BRIEF DESCRIPTION OF THE DRAWINGS The whole transmission chain schematic diagram which is 1st Example of this invention. Explanatory drawing of the connection state in the power transmission chain of FIG. FIG. 2 is a cross-sectional view in which a part of the transmission chain of FIG. 1 is enlarged. Explanatory drawing of the pin press-fitting hole of the outer plate used for the transmission chain of FIG. Explanatory drawing of the pin press-fit hole of the outer plate used for the power transmission chain which is 2nd Example of this invention. Sectional drawing which expanded the conventional roller chain partially. The figure which shows the damage state of the connection pin edge part in the roller chain of FIG. Sectional drawing which expanded the conventional other roller chain partially. The figure which shows the damage state of the connection pin edge part in the roller chain of FIG.

  According to the present invention, the bush is press-fitted into the bushing press-fit holes of the pair of left and right inner plates, and the connecting pins penetrating into the bushes are press-fitted into the pin press-fit holes of the pair of left and right outer plates, respectively. In the transmission chain knitted endlessly in the direction, the pin end of the connecting pin has the same diameter as the pin penetration part in the bush and is continuously pressed while being reduced in diameter from the pin press-fitting area. A taper taper pin region that is press-fitted into the outer plate, and an insertion hole region in which the pin press-fitting hole of the outer plate fits into the pin press-fitting region of the connection pin closer to the inside of the plate, and the connection pin continuously from the insertion hole region A taper hole area that fits in the taper taper pin area near the outside of the plate. As long as it reduces the work burden of knitting and knitting to the required chain length without causing slipping or bushing, and can exhibit excellent chain fatigue strength, any specific embodiment can be used. It doesn't matter if it exists.

  For example, the power transmission chain of the present invention may be either a roller chain or a bush chain, but in the case of a roller chain, the meshing with the sprocket becomes smooth and chain wear is prevented. Therefore, it is more preferable.

  In the transmission chain of the present invention, the number of inner links arranged in parallel in the chain width direction may be either a single row or a double row such as two rows or three rows.

Hereinafter, a transmission chain according to an embodiment of the present invention will be described with reference to the drawings.
Here, FIG. 1 is an overall schematic diagram of the transmission chain according to the first embodiment of the present invention, FIG. 2 is an explanatory view of a connected state in the transmission chain of FIG. 1, and FIG. FIG. 4 is a cross-sectional view of the transmission chain partially enlarged, FIG. 4 is an explanatory view of a pin press-fitting hole of an outer plate used in the transmission chain of FIG. 1, and FIG. 5 is a second embodiment of the present invention. It is explanatory drawing of the pin press-fit hole of the outer plate used for the transmission chain.

  First, as shown in FIGS. 1 and 2, the transmission chain 100 according to the first embodiment of the present invention press-fits the bushes 120 into the bush press-fit holes 111 of the pair of left and right inner plates 110 and Each of the connecting pins 130 penetrating each other is press-fitted into the pin press-fitting holes 141 of the pair of left and right outer plates 140 so as to be connected and knitted endlessly in the longitudinal direction of the chain. It is fitted.

Therefore, specific forms of the connecting pin 130 and the outer plate 140, which are the most characteristic features of the transmission chain 100 of this embodiment, will be described in detail with reference to FIGS.
First, the pin end portion 130a of the connecting pin 130 used in the present embodiment has a pin press-in region 131 having the same diameter as the pin through-hole 130b in the bush 120 and a tapered taper pin region that continues from the pin press-in region 131 while reducing its diameter. 132 and a pin projecting region 133 projecting to the outside of the outer plate 140 continuously from the tapered taper pin region 132.

  On the other hand, the pin press-fitting hole of the outer plate 140 used in the present embodiment is provided with an insertion hole region 141 closer to the inner side of the plate and a tapered hole region 142 closer to the outer side of the plate.

  As a result, during the chain cut-off operation, the press-fitting and fitting are performed in such a manner that the pin press-fitting region 131 and the tapered taper pin region 132 of the connecting pin 130 are respectively assigned to the insertion hole region 141 and the taper hole region 142 of the pin press-fitting hole. Has been.

In particular, the pin end portion 130 a of the connecting pin 130 has a pin press-fitting region 131 having the same diameter as the pin penetration portion 130 b in the bush 120 and press-fitted into the outer plate 140, and the pin press-fitting hole of the outer plate 140 is connected to the connecting pin 130. This is provided with an insertion hole region 141 that fits into the pin press-fitting region 131 closer to the inside of the plate.
As a result, the pin press-fitting region 131 of the connecting pin 130 is firmly press-fitted to the insertion hole region 141 of the pin press-fitting hole, close to the inner side of the plate, with the same diameter as the pin penetration part 130b in the bush 120 and without any step.

Further, the pin end portion 130a of the connecting pin 130 includes a tapered taper pin region 132 that continues from the pin press-fitting region 131 while reducing its diameter, and the pin press-fitting hole of the outer plate 140 includes a taper hole region 142 on the outer side of the plate. Yes.
As a result, when the chain is cut, the tapered taper pin region 132 of the connecting pin 130 exhibits a wedge function with respect to the tapered hole region 142 of the outer plate 140, and the insertion / removal force in the pin axis direction is reduced. Yes.

In this embodiment, the pin projecting region 133 of the connecting pin 130 is formed with a smaller diameter than the pin press-fitting region 131 of the connecting pin 130.
As a result, the force required to insert and remove the connecting pin 130 is concentrated in the pin protruding region 133, further reducing the connecting / disconnecting force of the connecting pin 130 with respect to the outer plate 140.
In addition, the pin protruding region 133 of the connecting pin 130 protrudes in a state where it is exposed to the outside of the outer plate 140, so that the connecting and removing operation of the connecting pin 130 with respect to the outer plate 140 is simplified.

  The transmission chain 100 of the present embodiment thus obtained has a pin press-fitting region 131 in which the pin end portion 130a of the connecting pin 130 is press-fitted into the outer plate 140 with the same diameter as the pin penetration portion 130b in the bush 120. A tapered taper pin region 132 that is press-fitted continuously into the outer plate 140 while reducing the diameter from the pin press-fitting region 131, and a pin protruding region 133 that protrudes outside the plate of the outer plate 140 continuously from the tapered taper pin region 132. In addition, the pin press-fitting hole of the outer plate 140 fits into the pin press-fitting region 131 of the connection pin 130 closer to the inner side of the plate, and the taper taper pin region 132 of the connection pin 130 continues from the insertion hole region 141. Tapered hole region 142 that fits on the outer side of the plate, thereby tapering The pin area 132 and the taper hole area 142 reduce the insertion / removal force of the connecting pin 130 with respect to the outer plate 140, and the pin protruding area 133 protrudes in a state where it is exposed to the outside of the outer plate 140. Reduces and simplifies the work of knitting and knitting to the required chain length without causing damage to the inner peripheral surface of the bush due to squeezing or squeezing from the inner plate to the end of the bush. The effect is enormous.

Next, a transmission chain 200 according to a second embodiment of the present invention will be described with reference to FIG.
Here, the configuration of the transmission chain 200 according to the second embodiment of the present invention other than the outer plate 240 is exactly the same as that of the transmission chain 100 of the first embodiment described above, and therefore relates to the transmission chain 100 of the first embodiment. The description of the configuration other than the outer plate 240 is omitted by replacing the 100th reference numeral shown in the specification and FIGS. 1 to 3 with the 200th reference numeral.

  Therefore, a specific form of the outer plate 240 that is most characteristic of the transmission chain 200 of the present embodiment will be described in detail with reference to FIG.

That is, in the outer plate 240 used in the present embodiment, deformation absorption grooves 242a that absorb the press-fitting deformation allowance of the tapered taper pin region 232 of the connecting pin 230 are radially formed in the tapered hole region 242 of the outer plate 240 from the hole center. ing.
As a result, when the connecting pin 230 is press-fitted into the pin press-fitting hole of the outer plate 240, the deformation absorbing groove 242a on the outer plate 240 side reduces the press-fitting deformation allowance of the tapered taper pin region 232 of the connecting pin 230 being crushed. It absorbs and assists plastic deformation on the connecting pin 230 side.

  Therefore, in the transmission chain 200 according to the second embodiment of the present invention, in addition to the effect exhibited by the transmission chain 100 according to the first embodiment of the present invention, the deformation absorbing groove 242a on the outer plate 240 side is firmly press-fitted. The effect is enormous, for example, the connection pin can be securely prevented from rotating with respect to the pin press-fitting hole of the outer plate at the cut-off portion by realizing the fitting.

100, 200 ... Transmission chain 110, 210 ... Inner plate 120, 220 ... Bush 130, 230 ... Connection pin 130a, 230a ... Pin end part 130b, 230b ... Pin penetration part 131 231 ... Pin press-fit area 132, 232 ... Tapered taper pin area 133, 233 ... Pin protrusion area 140, 240 ... Outer plate 141, 241 ... Insertion hole area 142, 242 ... Taper Hole region 150, 250 ... Roller 242a ... Deformation absorbing groove 500, 600 ... Roller chain 510, 610 ... Inner plate 520, 620 ... Bush 530, 630 ... Connecting pin 540, 640 ... Outer plate 550, 650 ... Roller

Claims (3)

The bushes are press-fitted into the bushing press-fit holes of the pair of left and right inner plates, and the connecting pins that pass through the bushings are press-fitted into the pin press-fit holes of the pair of left and right outer plates, respectively, and endless in the longitudinal direction of the chain. In the transmission chain linked to
The pin end portion of the connecting pin has the same diameter as the pin penetrating portion in the bush and is press-fitted into the outer plate, and the taper taper pin is continuously pressed into the outer plate while being reduced in diameter from the pin press-fitted region. With areas,
The pin press-fitting hole of the outer plate is fitted to the pin press-fitting region of the connecting pin closer to the inner side of the plate, and is continuously fitted from the insertion hole region to the tapered taper pin region of the connecting pin closer to the outer side of the plate. A transmission chain comprising a tapered hole region.   The transmission chain according to claim 1, wherein a pin protruding region that protrudes outward from the outer plate of the connecting pin is formed to have a smaller diameter than a pin press-fitted region of the connecting pin. .   The deformation absorbing groove for absorbing the press-fitting deformation allowance of the tapered taper pin region of the connecting pin is formed radially from the hole center in the tapered hole region of the outer plate. Transmission chain.

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