CN203109889U - Lining puller used in small space - Google Patents

Abstract

The utility model belongs to mechanical products, and relates to a bushing puller used in small spaces for aircraft ground support and automobile repair. The puller is composed of a sleeve, screw, nut, bearing, cylindrical pin and eccentric tongue. The screw is placed in the sleeve, one end of the screw is connected to the nut, and the bearing is located between the sleeve and the nut. The pulling function is realized through threaded connection. ;The other end of the screw rod is hinged with the eccentric tongue through a cylindrical pin. The center of gravity of the eccentric tongue does not coincide with the rotating shaft. The utility model is suitable for the disassembly of bushes with narrow working spaces such as aircraft and automobile repairs, so that the bushes that cannot be disassembled can be dismantled conveniently, which improves work efficiency, shortens the maintenance time of equipment, and reduces the labor intensity of maintenance personnel. , saving the cost of replacing new parts.

Description

Bushing puller for small spaces

technical field

The utility model belongs to mechanical products, and relates to a bushing puller used in small spaces for aircraft ground support and automobile repair.

Background technique

Usually, for the disassembly of the over-tight bushing, the method of direct knocking and electric drill is usually used to pull out the bushing, and then replace the new bushing. This method is easy to damage the bushing, which is time-consuming, laborious, inefficient, and seriously affects the equipment. maintenance, and it becomes more difficult to disassemble the bushing when the space is not open; there are also special tools made of the principle of friction with the inner hole of the bushing to pull the bushing out of the housing. Either it is easy to scratch the inner hole of the bushing, or the limit is unreliable and easy to fail, and it is laborious to pull out the bushing, so the effect is not very good.

Contents of the invention

The purpose of the utility model is to provide a bush puller which can work in a narrow space.

The technical solution of the utility model is that it is composed of a sleeve, a nut, a screw, a bearing, an eccentric tongue and a cylindrical pin. Tongue connection, the bearing is located between the nut and the sleeve, the eccentric tongue can rotate freely around the cylindrical pin, and the center of gravity of the eccentric tongue does not coincide with the axis of the cylindrical pin, in the free state, the eccentric tongue is perpendicular to the screw rod under the action of gravity .

Beneficial effects of the utility model: the utility model adopts the hinged structure of the screw rod and the eccentric tongue to realize the position-limiting function. Compared with the existing special puller relying on the transmission force of the inner hole of the bushing, the position-limiting is reliable and will not damage the lining. The inner diameter of the sleeve is simple in structure, easy to manufacture, convenient to use, and cheap in price. It is suitable for the disassembly of bushes with narrow working space on the aircraft, so that the bushes that cannot be disassembled can be easily removed. It only takes 1 to complete the disassembly of a bush. ~5 minutes, which improves work efficiency, shortens equipment maintenance time, reduces the labor intensity of maintenance personnel, and saves the cost of replacing new parts.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a sectional view of A-A in Fig. 1 .

FIG. 3 is an enlarged view of the B-B sectional view in FIG. 2 .

Among them, 1: sleeve, 2: nut, 3: screw, 4: bearing, 5: eccentric tongue, 6: straight pin

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 to 3, the bushing puller for small spaces is composed of a sleeve 1, a nut 2, a screw 3, a bearing 4, an eccentric tongue 5 and a cylindrical pin 6, the screw is placed in the sleeve, and one end of the screw is It is connected with the nut, the other end of the screw rod is connected with the eccentric tongue through a cylindrical pin, and the bearing is located between the nut and the sleeve. The eccentric tongue can rotate freely around the cylindrical pin, and the center of gravity of the eccentric tongue does not coincide with the axis of the cylindrical pin. In the free state, the eccentric tongue is perpendicular to the screw rod under the action of gravity.

When in use, when the bushing is installed in a narrow space, there is no knocking space for the bushing. First, extend the screw rod, turn the eccentric tongue to be coaxial with the screw rod, and then extend into the bushing hole; secondly, wait for the eccentric tongue After completely passing through the bushing hole, the eccentric tongue turns to the direction perpendicular to the screw rod under its own weight, and rotates and retracts the screw until the eccentric tongue is in close contact with the bushing; finally, the sleeve is supported by the bushing seat and held by hand , tighten the nut, the screw retracts, and the bush is pulled out.

In order to better implement the utility model, after the eccentric tongue completely passes through the bushing, in order to better retract and tighten the screw, a cross hole perpendicular to the axial direction is provided on the screw, which is convenient for insertion with an auxiliary universal tool , quickly tighten the screw.

The utility model has reliable position limit, small volume, simple structure, easy manufacture, convenient use and low price, and is suitable for dismantling bushes with narrow working spaces such as military aircraft, various civil aircraft, ships, automobiles, and other mechanical equipment. The bushes that cannot be disassembled can be easily removed, and it only takes 1 to 5 minutes to complete the disassembly of a bush, which improves the work efficiency, shortens the maintenance time of the equipment, reduces the labor intensity of the maintenance personnel, and saves the cost of replacing new parts. cost.

Claims (1)

1. A bushing puller for small spaces, characterized by: a sleeve (1), a nut (2), a screw (3), a bearing (4), an eccentric tongue (5) and a cylindrical pin (6) The screw (3) is placed in the sleeve (1), one section of the screw (3) is connected with the nut (2), and the other end of the screw (3) is connected with the eccentric tongue (5) through a straight pin (6), The bearing (4) is located between the nut (2) and the sleeve (1), the eccentric tongue (5) can rotate freely around the cylindrical pin (6), and the center of gravity of the eccentric tongue (5) is not aligned with the cylindrical pin (6) The axes coincide, and in the free state, the eccentric tongue is perpendicular to the screw rod under the action of gravity.

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