CN2073870U - Chain hoist - Google Patents

Abstract

The utility model relates to a chain for driving, in particular to a turning chain hoist, comprising a chain board, a rolling pin and a blocking board. The utility model is characterized in that the middle chain board is provided with two pin holes, and each pin hole is respectively inserted with two rolling pins; the relative roll can be happened between two rolling pins in the pin hole of the chain board to reduce the wearing between the chain board and the rolling pin for the free turning of the chain while the chain has meandering movement surrounding the chain wheel. The utility model has the advantages of simple structure, easy manufacture, high durability, regularless lubricating and convenient maintenance.

Description

Hoisting chain

The utility model relates to a kind of chain that is used for transmission, and that particularly uses in oil industry turns to hoisting chain.

During recover petroleum, the steel rope of suspention pumping rod, must be on the fixed pulley on the derrick, crank motion changes the power transmission direction, with the crude oil extraction, for the oil pumper of overstroke, because the diameter of fixed pulley can not be too big, the steel rope that turns to lift heavy is in alternating bending, under the effect of stretching, steel rope is very easily damaged, according to statistics, the general life-span had only about half a year, and the breakage of steel rope, tend to cause bigger fault, strengthened service expenditure,, become in the oil recovery industry so how to prolong the life-span that turns to the lift heavy steel rope, the difficult problem of long stroke pumping unit solves up to no method.

The purpose of this utility model is that a kind of hoisting chain that turns to will be provided, and is used for replacing having turned to reusing steel rope, and it can be centered around on the larger-diameter sprocket wheel and move back and forth, and durable in use.

The purpose of this utility model be achieved in that this turn to the lift heavy chain by carrier bar, roll pin and baffle plate is constituted, in two pin-and-holes of all middle carrier bars, all penetrate two and roll pin, the carrier bar outside, then, carrier bar is assembled into one, when chain is crooked by passing the baffle plate that rolls pin, roll pin by two and in the pin-and-hole of carrier bar, roll relatively, chain is enclosed on the sprocket wheel.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof:

Fig. 1 looks scheme drawing for middle carrier bar master.

Fig. 2 looks scheme drawing for a middle carrier bar left side.

Fig. 3 looks scheme drawing for connecting the carrier bar master.

Fig. 4 is the baffle plate scheme drawing.

Fig. 5 is for rolling the pin scheme drawing.

Fig. 6 is for rolling the pin schematic cross-section.

Fig. 7 is chain assembling back scheme drawing.

Below in conjunction with accompanying drawing, describe concrete structure of the present utility model and tool service condition in detail.

With reference to Fig. 1-7, this turns to hoisting chain by carrier bar, roll pin, baffle plate 3 constitutes, the radius of curvature of carrier bar outer rim and sprocket wheel contact portion is identical with the radius of sprocket wheel driving surface, two pin-and-holes on every block of carrier bar remove and are positioned at two ends and do not need on the crooked connection carrier bar 12, one of them pin-and-hole is outside the circular pin hole 41, two pin-and-holes on another pin-and-hole and all the other the intermediate chain plates 11 are Long Circle pin-and-hole 42, in each pin-and-hole 42, penetrate two and roll pin, rolling the pin cross section is that each drift angle becomes circular-arc triangle, length is rolled pin 21 and is passed pin-and-hole and baffle plate 3, penetrate retainers 6 such as steel wire in the at both ends stomidium 5, weak point rolls pin 22 two ends and then keeps off in baffle plate 3, so that carrier bar is fused, for guaranteeing working accuracy and easy to assembly, with the overlapping use of carrier bar.

Crooked when mobile when turning to hoisting chain to center on sprocket wheel on the derrick, the rolling that pin must be strained by its both sides carrier bar of two inboards in two pin-and-holes on the middle carrier bar 11 and produce relative rolling between pin with rolling of two outsides with the rotation of carrier bar direction, reduce carrier bar and rolled wearing and tearing between pin, in addition, because sprocket wheel adopts the sheave form, cell wall plays directional tagging, the radius with the sprocket wheel driving surface is identical again for the radius of curvature of carrier bar outer rim and sprocket wheel contact portion, so chain rotates crooked on sprocket wheel, nimbly and freely.

The utility model because of mainly by carrier bar, roll pin and baffle plate is constituted, so simple in structure, easy to manufacture; Because the curved major of chain will be by rolling the relative rolling of pin, reduce carrier bar and rolled wearing and tearing between pin, thus firm durable, easy to maintenance, needn't often lubricate, help ordinary production; In addition, chain load power is added and is increased with cross section upper link plate quantity, so load can strengthen, is used for replacing turning to the steel rope of lift heavy, and bigger economic benefit is arranged.

Claims (1)

1, a kind of chain that is used for transmission particularly turns to hoisting chain, by carrier bar, roll pin and baffle plate is constituted, it is characterized in that:

The radius of curvature of-carrier bar outer rim and sprocket wheel contact portion is identical with the radius of sprocket wheel driving surface, and two pin-and-holes on the middle carrier bar 11 are Long Circle pin-and-hole 42;

-in each pin-and-hole 42, penetrate two and roll pin, rolling the pin cross section is that each drift angle becomes circular-arc triangle.

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