SU787350A1 - Hydraulic jack for vertical and horizontal moving of load - Google Patents

Description

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The invention relates to devices for lifting and moving loads, in particular, to small-sized hydraulic jacks for precise installation and alignment of process equipment on foundations with a slight height of the dressing layer.

Hydraulic jacks for vertical and horizontal movement of cargo are known, comprising a vertical displacement cylinder body 10, in the hollow stem of which a horizontal movement mechanism is mounted, made in the form of a piston on which a wedge mechanism is mounted, and supplied with pre-compressed springs to return to the original position 1.

The disadvantage of such jacks is the large size in height, which does not allow the use of such a jack for the alignment of technological equipment with the height of the gravy S. POY up to 50-80 cm.

Also known are hydraulic jacks 25 for vertical and horizontal movement of the cargo, comprising a housing with blind holes for - supporting plungers, channels, joints of diameter mentioned above.

openings between themselves and a movable piston located in the center of the body, carrying a wedge mechanism

moving the load plate, provided with a drive for rotating it, and a measuring device with a rod for measuring the movement of the load plate 2.

 The disadvantage of the invention is that at the beginning of the movement after long stops of the cylinder and its seals, there is a significant force of static adhesive resistance to movement due to an increase in the coefficient of friction, the numerical value of which reaches one or more. Increasing the cylinder rotational moment by increasing the blade area is not possible due to the limited height and mass of the jack. Small (3.-5 mm) vertical stroke of the torque cylinder piston is commensurate with the residual deformation (0.8-1.2 mm) of the flat springs that spring up the piston. As a result, the tightness at the end of the piston is broken and the turning mechanism ceases to function. Due to the preparation of sawtooth protrusions on the base plate and the piston of the torque cylinder,

with their limited dimensions, it is difficult and the measurement method used does not provide the specified accuracy. All this does not provide sufficient efficiency and reliability of its work.

The purpose of the invention is to increase the efficiency and reliability of the device.

The goal is achieved by the fact that the drive of rotation of the wedge mechanism is made in the form of a friction bevel gear consisting of a drive shaft and a driven wheel with an eccentric flange and an axial bore, freely mounted on the piston and carrying a wedge mechanism fixed in the said axial bore, This drive shaft friction transmission is installed in the housing of the jack with the possibility of axial movement, forming

the limiting stop for the piston, and the wedge mechanism consists of an inclined base with a groove and a spring-loaded eccentric axis located in the groove, which carries the load plate mounted on it.

FIG. .1 shows a partially cut jack, top view; in fig. 2 is a section A-A in FIG; FIG. 3. Sec. B — B in FIG. one.

The hydraulic jack contains the housing 1, the piston 2, the supporting plungers 3 connected by channels 4 with a blind bore 5. In the housing 1 the rod b of the measuring device is movably located. The piston 2 is loosely mounted; the keno is a conical wheel 7 with a rim 8. The rim 8 is made eccentric with respect to the axis of the piston 2 and comes into contact with the measuring rod b. In the axial bore of the wheel 7, the base of the wedge mechanism 9 with the movable cargo plate 10 is fixedly mounted, which is mounted on the eccentric axis 11. The axis 11 is preloaded by the spring 12 and can perform reciprocating movement in the groove 13 of the base 9. The upper bearing surface of the cargo plate 10 is spherical and the bottom is flat. The conical surface of the wheel 7 is mated to the drive shaft 14 and, when interlocking, form a conical and friction gear. The shaft 14 is pivotally connected with the handle 17 by means of the coupling 15 and the ring with the eye 16 and can perform the Hcte rotator and translational motion relative to the housing 1 and its own breathing axis. On case 1, a bracket 18 is movably mounted with a dial gauge of type 19. Arm 18 can be moved relative to case 1 and fixed in the desired position. Indicator 19 is installed so that the measuring head contacts the measuring rod b or stand 20, which is rigidly connected to the drive shaft 14. In the first case, indicator 19 measures the angle of rotation of the base of the wedge mechanism 9, and in the second, it is used to set the horizontal movement of the cargo the plates 10 together with the load 21. The working fluid is supplied from the pump through the opening 22 under the ball valves 23 and 24, which are regulated by screws 25 and 26. The channels 27 and 28 connect, respectively, the cavities under the piston 2 and n Hell plungers 3 also by means of ball valves 23 and 24 with a bore 22. Between the cavities under the piston 2 and the supporting plungers 3 are hydraulically hydraulically by means of channels 29. To lift the load, the jack is installed on the foundation at the place of the supposed support of the equipment being reversed, which is lowered onto the jack mechanism. The working fluid is pumped through the hole 22 under the ball valve 24, which is previously opened by turning the screw 26, and then into the channel 28 supporting plungers 3. Under the pressure of the working fluid, the housing 1 moves upward relative to the plungers 3 together with the load 21 installed on the jack. The casing 1 is returned to its original position by draining the working fluid from the piston cavities into the pump tank and against the protruding part of the casing 1 on which the bracket 18 is fixed. To set the desired direction The horizontal movement of the load 21 is necessary to press the handle 17 in the direction towards the load 21, so that the shaft 14 engages with the driven wheel 7 along the cones forming them. By turning the knob 17 relative to the axis of the shaft 14, the driven wheel 7 is set in motion, with which the base 9 of the wedge mechanism is rotated. The angle of rotation is calculated according to the indication of the arrows of the indicator 19, the scales of which are recalculated in units of angles (according to the table). The movement of the arrows of the indicator 19 occurs under the action of forces from the measuring rod 6, which moves under the action of the driven wheel 7, due to the eccentricity of its flange 8, which performs a rotational movement together with the wheel 7 relative to the vertical axis. In one full rotation of the flange 8, the measuring rod makes a movement equal to its eccentricities. A full 360 turn is achieved due to the cyclic movement of the wheel shaft 14, which the operator performs by controlling the handle 17, communicating complex movement — translational and rotational.

Claims (2)

The determination of the magnitude of the horizontal displacement. The indicator 19 is removed from the bracket 18, rotates through an angle of 180, and is mounted on the bracket 18 again. Then the bracket 18, together with the indicator 19, moves in the direction of the post 20 until the measuring head of the indicator moves by the stroke of the piston 2, which is determined by the preliminarily prepared table and is measured on the scale of the indicator 19. Then the handle 17 is retracted by aligning the indicator arrow 19 with the zero mark of the scale. As a result of this, a gap is formed, which form the cones of the drive shaft 14 and the driven wheel 7, which is equal to the required value of the working stroke, piston 2. The horizontal movement of a load by a jack is carried out in two modes, determined by the type of source of force acting on piston 2. Offline mode. Departure of the force of gravity of the load 29 in the cavity 5 creates the pressure of the working fluid. At the screw collar 25, a gap is formed between the latter and the ball valve 23. Under the pressure of the working fluid, the bypass ball valve 23 departs and the working fluid through channel 28 from cavities 5 flows through hole 22 and channel 27 under piston 2. Piston 2 coBepLuaeT descends upwards, and case 1 simultaneously moves downwards. Pump mode. In flexible pipelines from the pump (not shown), the working fluid is supplied through the opening 22 under the piston 2, and the channel 28 is blocked by a ball valve 24. At the same time, the piston 2 will move upwards. The next process of moving the load for 21 for both modes is identical. The piston 2, lifted upward by means of the wedge mechanism, acts on the spherical surface of the cargo plate 10 on the load 21. The load 21 is detached from the housing 1 and, together with the cargo plate 10, which has sang along the inclined plane, the base 9 of the wedge mechanism, moves in the direction of its slope. The horizontal movement of the load is caused by the action of the horizontal component of the body weight of the load, resulting from its decomposition in the wedge mechanism of the jack. The movement of the load will continue until the driven wheel 7 comes into contact with the drive shaft 14 and, thus, there will be a pre-set clearance for the stroke of the additional piston 2. In this case, the drive shaft 14 fulfills the function tsevogo emphasis. Piston 2 is reset to its initial position by pressing the handle 17 from itself, with preliminary opening of the drain valve (not shown) until the indicator 19 arrow is in the position set when determining the value of the horizontal movement of the load 21. Simultaneously with the movement of the piston 2, the loading plate 10 moves to its initial position from the action of the compressed spring 11. A conical friction transmission, which acts as a wedge jack, moves the piston 2 down. The hydraulic jack device is used for precise installation and alignment of technological equipment on foundations with the height of the gravy layer of 50-80 mm, sets the direction of linear movement of the load and sets the amount of horizontal movement of the load with an accuracy determined by the indicator, thereby eliminating overwhelming of the load. The use of a cargo plate with a spherical bearing surface and an eccentric movable axis of rotation simplifies jack manufacturing, eliminates sticking and provides parallel operation of two or more jacks with high reliability, which increases installation efficiency. Claims of the invention Hydraulic jack for vertical and horizontal movement of cargo, comprising a housing with blind holes made therein for supporting plungers, channels connecting said openings between themselves and a movable piston located in the center of the housing, carrying a wedge movement of the load plate, equipped with a drive for its rotation and a measuring device with a rod for measuring the movement of the load plate, characterized in that, in order to increase the efficiency and reliability of its operation The booms, the rotation drive of the wedge mechanism, are made in the form of a friction bevel gear consisting of a drive shaft and a driven wheel with an eccentric flange and an axial bore, freely fitted on the piston and carrying a wedge mechanism, while the drive shaft of the friction gear The gear is installed in the jack body with the possibility of axial movement, forming a limiting stop for the piston, and the wedge mechanism consists of an inclined baseline with a groove and a subplate located in the groove the vinous eccentric axis carrying the cargo plate installed on it. Sources of information taken into account in the examination 1. The author's certificate of the USSR 409948, cl. In 66 F 9/04, 1972. 2. Author's certificate of the USSR 2417612/11, cl. B 66 -F 1 / 08.04.11.76 (prototype).