JP2008013327A - Three-dimensional curved-traveling chain having automatic oil feed passage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic oil feed chain capable of considerably reducing wear of a hinge pin, a link pin and other chain movable parts, and preventing ballast from being stained to solve a problem in which a curved-traveling chain for scraping and conveying track bed ballast under railroad rails is always exposed to crushed stone dust, and its lifetime is short. <P>SOLUTION: The automatic oil feed chain has a pouring hole 10 opened in a bottom part 11 of a hinge pin 4, and a plurality of branched passages 13 opened in a pin side face from the pouring hole. A guideway communicated with a pin hole of a link pin from the hinge pin hole in hinge stepped parts 2A, 3A of a connection body is provided. A discharge hole from a circumferential surface to a shaft end is formed in the link pin. A pressurized lubricating oil is fed from a sprocket while the bottom part 11 of the hinge pin of the chain is brought into contact with an interdental bottom surface 27 of a driven sprocket on the chain fore end side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a chain that automatically supplies lubricating oil to a connecting pin of a three-dimensional curved chain that can be bent and reversed with respect to a rotating surface of the chain during operation.

Insert the horizontal tip of a rotating 3D curved chain with a ballast scraping claw into the ballast on the underside of the railroad rail, bend and invert the side of the rail, and discharge the scraped ballast to the transfer conveyor of the work vehicle The apparatus has been proposed by the present inventors (Patent Document 1) and is known.

Japanese Patent No. 3696059

The chain used in this device can be operated at a speed of around 3m / second (maximum speed 5m / second), which improves the scraping amount of the roadbed ballast, but it is used in a poor environment such as ballast dust. As a result, the wear of connecting pins such as the link pin is large, and the chain needs to be replaced early. For this reason, in order to reduce the resistance and wear of the connecting pins, multiple spray nozzles were placed in the support frame of the chain and the lubricant was sprayed during operation. In addition, it cannot be expected, and it is not preferable to spray a large amount because it will contaminate the ballast.

The present invention supplies pressure oil from the sprocket while the bottom part of the hinge pin of the chain is in contact with the interdental bottom surface of the driven sprocket on the tip side of the chain, and the supplied lubricating oil lubricates the peripheral surface of the hinge pin. Thus, an automatic oil supply chain is provided that exudes to the outside from the discharge hole of the shaft center through the peripheral surface of the link pin.
That is, the chain of the present invention is a ballast scraping three-dimensional curved run in which a link member provided with a scraping claw is connected to each of a pair of connecting members connected by a hinge pin by a link pin in a direction orthogonal to the hinge pin. The chain includes an injection hole that is drilled along the axial center of the hinge pin and opens to the bottom, and a plurality of shunts that open from the injection hole to the side surface of the pin. The link pin extends from the pin hole of the hinge pin into the hinge portion of the coupling body. A guide passage communicating with the pin hole is provided, and a discharge hole extending from the peripheral surface to the shaft end is formed in the link pin.
In addition, the sprocket required for the chain of the present invention is provided with a plurality of radial introduction passages that communicate with the discharge ports opened at the interdental bottoms of the sprocket on the sprocket rotor, and between the supply holes that open on the fixed pivot peripheral surface. Alternatively, a rotary valve may be configured, or a residence chamber may be configured in the semicircular portion on the tip end side of the fixed shaft so that it can be simultaneously supplied to a plurality of locations.

According to the present invention, the useful life of the chain can be extended, which is economical, and there is an advantage that the lubricating oil to be used can be used without waste.

(Chain structure)
The three-dimensional curved chain 1 is pivotally attached by a hinge pin 4 via stepped hinge portions 2A and 3A in which a pair of connecting bodies 2 and 3 are engaged with each other and scraped to the end side of the connecting body. One end of a link leg piece 7 suspended from both lower surfaces of the upper surface plate 6 on which the claw 5 is fixed upright is pivotally connected by a link pin 8 and is known per se. 10 is an injection hole drilled from the bottom 11 of the hinge pin 4 along the axial center, and 12 is an opening. Reference numeral 13 denotes a shunt that penetrates in the diametrical direction around the injection hole at a position corresponding to the hinge portion, and is provided in two stages in the figure. In each hinge portion, the pin holes 4A of the hinge pins are connected to both link pins. A guide path 14 leading to the pin hole 8A is provided. Reference numeral 15 denotes a discharge hole that opens from the side surface of the link pin through the shaft center to the end, and the discharged oil also acts as a lubricant for the surface of the curved guide roller 17. Instead of the discharge hole, a gentle curve or a spiral groove may be provided on the peripheral surface of the link pin. Reference numeral 16 denotes a hinge pin fixing nut.

(Composition of oiling sprocket)
Reference numeral 20 denotes a fixed pivot of the oil supply sprocket S. Reference numeral 21 denotes a central hole which is connected to the lubricating oil supply pipe 22 and includes a supply hole 23 which opens in at least one position of the fixed shaft body in the radial direction. The fixed pivot 20 is fixed to a support frame 24 of the chain. Reference numeral 25 denotes a cover.
The supply hole 23 is set in the direction of the hinge pin oil supply position on the sprocket. Reference numeral 26 denotes a sprocket rotating body, in which introduction paths 29 are radially provided at equal angular intervals between the interdental bottom portion 27 of the sprocket and the inner periphery of the shaft hole 28 fitted to the fixed shaft. Reference numeral 30 denotes an inlet for the introduction path, which is not limited to a circular hole but may be a long groove in the circumferential direction. 31 is a discharge port of the introduction path. Reference numeral 32 denotes a seal ring which can withstand a supply pressure (0.1 to 0.3 MPa).

While the chain 1 wound around the oil supply sprocket S circulates on the outer periphery of the sprocket rotor 26, the injection opening 12 of the hinge pin bottom 11 is always connected to the discharge port 31 at the center of the bottom surface 27 of the sprocket. Thus, when the inlet 30 of the introduction passage communicating with the discharge port 31 and the supply hole 23 of the fixed shaft are in communication with each other, the pressure oil is supplied into the injection hole 10 of the hinge pin 4. Then, it is gradually discharged from the end of the link through the guide hole 14 of the hinge part and the discharge hole 15 of the link pin 8, and during this time, the peripheral surface of each connecting pin is lubricated.
That is, once injected, the lubricating oil oozes around the hinge pin, the stepped portion of the connecting body, and the link pin by the rotation of the connecting body and the link, and finally from the discharge hole 15 of the link pin to the outside of the guide roller side. Discharged.

Partial cutaway plan view of chain and driven sprocket Partial vertical side view of the sprocket side Enlarged vertical side view of chain assembly Cross section plan view of the main part of the chain

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chain 2, 3 Connection body 2A, 3A Hinge step part 4 Hinge pin 4A Pin hole 5 Scraping claw 6 Link upper surface board 7 Link leg piece 8 Link pin 8A Pin hole 10 Injection hole 11 Pin bottom part 12 Opening 13 Shunt 14 Guide path 15 Discharge hole 16 Closing nut S Sprocket 20 Fixed pivot 21 Center hole 22 Lubricating oil supply pipe 23 Supply hole 24 Support frame 25 Cover 26 Rotating body 27 Interdental bottom 28 Shaft hole 29 Inlet path 30 Inlet 31 Inlet 31

Claims (1)

In a ballast scraping three-dimensional curved chain in which a link member having a scraping claw is connected to each of a pair of connecting members connected by a hinge pin by a link pin in a direction orthogonal to the hinge pin, the shaft of the hinge pin An injection hole that is drilled along the heart and opens to the bottom, and a plurality of shunts that open from the injection hole to the side surface of the pin, and a pin hole of the link pin from the pin hole of the hinge pin in each hinge portion of the pair of coupling bodies The link pin is provided with a discharge hole extending from the peripheral surface to the shaft end, and the hinge pin inlet is provided while the bottom of the hinge pin is in contact with the interdental bottom surface of the driven sprocket. A three-dimensional curved chain with an automatic oiling passage through which lubricating oil is injected.

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