SU1257153A1 - Chuck for spindle drilling rig - Google Patents

Description

112

The invention relates to mining, in particular to equipment for drilling wells.

The aim of the invention is to increase the reliability of the clamping cartridge.

1 shows the proposed cartridge, a longitudinal section j in FIG. 2, section A-A in FIG. 1,

It contains gripping dies 1 with external wedge surfaces, which are covered by oboymi 2 with wedge samples and springs 3, Dies 1. placed in the sockets of spindle 4 and cover the working tube 5. Bearing sleeves 6 form a wedge-shaped cavity with inclined surfaces which includes wedge shanks 7 spring-loaded plungers 8, the plungers 8 are placed in radially located cylinders 9 mounted on the housing 10 having support shoulders 11. The housing 10 is connected to the crosspiece 12, which serves to connect to the feeder tool and interacting with the spindle by means of bearings 13,

The clamping cartridge works as follows.

During drilling, the working bone-and-bone does not flow into the cavities of the cylinders 9, therefore, under the action of the springs 3, the clips 2 move their wedge-shaped samples onto the wedge surfaces of the gripping dies 1, as a result of which the latter npi-gaimeyut 5 and transmit torque from tpinda

53: - 2 liters 4 driving tube 5. In this case, the spindle 4, rams 1, sleeves 2, springs 3 and inner race of bearings 13 have both a rotary movement and a translational movement, due to the connection of the housing .10 with a cross-arm 11 connected to the device supplying the tool through the bearings 13. In this case, the plunger-cylinder pairs of the hydraulic control system almost do not perceive irregular vibrations of the pipe 5, since between the contact surfaces of the bearing cages 6 and the plungers 8 there is a gap due to release by the last springs. The movement of the clips is limited to the support shoulders 1 1.

i,.

If it is necessary to return the movable part of the tool feeder to the upper initial position, the working fluid is fed into the cavities of the cylinders 9, as a result of which the plunger 8 will begin to move to the central axial line of the chuck and exert its external wedge 7 on the inner bearing cages 6. As a result, the springs 3 are compressed, the clips 2 descend from the wedge surfaces of the gripping dies 1 and the latter cease to transmit a torque. The clamping cartridge is raised to the upper initial position by means of the tool feeder, the supply of the working fluid to the cylinder cavity 9 is stopped and the process is repeated.

ffit / f.Zvnipi

Order .4887 / 23 Circulation 548

Productive polygons, Uzhgorod, st. .Project, 4

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Claims (1)

The chuck spindle drilling machine comprising a housing, arranged in it a spring-loaded ring with a wedge surface for interaction with corresponding wedge surfaces of the clamping plates arranged in grooves of the spindle, and a hydraulic control system, characterized in that, with the aim to improve reliability of the cartridge in _the work, the hydraulic control system is made in the form of a series of hydraulic cylinders placed around the perimeter of the cartridge concentrically to the holder, while the plungers of the hydraulic cylinders are spring-loaded relative to the housing and are made with new shank mounted with the possibility to interact with the wedge surface provided on the races of thrust bearings. SU „1257153 7? 1257153: ’1