SU1557093A1 - Hoist drive - Google Patents

Abstract

The invention relates to lifting devices and can be used in elevators for use in automatic machine tool lines, as well as for lifting loads. The purpose of the invention is the expansion of technological capabilities. The drive contains two shoulder arms, driven 1 and leading 2 shoulders of which are pivotally connected to each other by an axis 10 provided with a roller 9 moved in vertical guides 7 of the base 8. The upper ends of the shoulders 1 are equipped with rollers 3 on which the lifting platform 4 rests. Lower ends the shoulders 2 are provided with rollers 5 and are connected by an adjustable thrust 6 moved by the sliding rod 11 of the actuator 12. The rollers 5 are arranged to interact with the horizontal guides 13 of the base 8. The driven 1 and the master 2 shoulders have a device for changing the angle between and x longitudinal axes followed by fixing the mutual arrangement in the vertical plane. 3 il.

Description

Rie.1

The invention relates to lifting devices and can be used in elevators for use in automatic machine tool lines, as well as for lifting loads.

The purpose of the invention is the expansion of technological capabilities.

Figure 1 shows the drive lift, a General view; in fig. 2 - the trajectory of movement of the two shoulders with fig. 3 - the same, with d 0 °. The lift drive includes two shoulders, consisting of one, (slave) 1 and other (leading) 2 arms. The upper (one) shoulders 1 are equipped with rollers 3, on which the lifting platform 4 is supported. The lower (other) shoulders 2 are equipped with rollers 5 and are connected by a 6, the length of which may be varied, for example, by means of threaded connections of the elements included thereto. Two-arm levers with their middle parts are placed in vertical guides 7 of the base 8 for reducing friction losses the middle parts of the levers are equipped with rollers 9, pivotally connected by an axis 10, which roll in vertical guides 7. One end of the rod 6 is pivotally connected a rod 11 of a displacement actuator 12 mounted on a base 8; The lower rollers 5 are arranged to contact horizontal guides 13 located on the base 8 and are hingedly connected to the ends of the shoulders 2 by means of an axis 14. Some 1 and others The two arms of the arms are hinged to each other through the axis 10 and can be fixed at different angles between themselves.

Drive lift works as follows.

Under the action of the actuator 12, the rod 11 moves to the left, moving the adjustable threaded rod 6, the lower shoulders of the two double-arm levers and the rollers 5. a vertical force arises, moving the two shoulders lever together with the axles 10 and the rollers 9 along the vertical guides 7. The vertical movement of the lifting platform 4 supported on the upper rollers 3 will be determined by the rotational movement of the two shoulders Agov about axes 10 and simultaneous vertical movement in the two-armed levers of the guide 7 (see fkg.2 where d -. the initial angle of the two-armed lever).

To lower the lifting platform 4 under the action of the actuator 12, the rod 11 moves to the right along with the thrust 6, lower arms 2 and lower rollers 5. Two shoulders rotate around axis 10, and under the force of gravity the lifting platform 4 lowers while pressing the lower rollers B to horizontal guides 13.

o In order to expand the technological capabilities of the device, the lifting mechanism drive can be made according to the principle of a screw-nut, while the relatively rotating screw will move the nuts attached to the lower axles of the double-arm levers.

The increase in the initial rate of lifting of the load is achieved by reducing the initial angle d of the installation

Q two shoulders adjustable threaded lever 6.

Fig. 3 shows the trajectory of movement of the two shoulders with a negative initial angle d of the installation.

When moving the lower end of the lever from position I to position P, the double-arm lever rotates around axis 10, raising the lifting Q platform 4, and together with axis 10

descends from position III to position IV, reducing the lifting height of the platform 4. However, the total amount of lifting of the platform 4 with 45 equal movements of the lower end of the lever with a negative initial angle d is greater than with a positive value.

50

formula of invention

A lift drive containing at least two pairs of double-arm levers, articulated with the possibility of rotation in the vertical plane connected with the middle parts of the base of the lift, on one arm of which a lifting platform is located, and the others are articulated by a thrust adjustable and with the drive of their movement mounted on the base, characterized in that, in order to expand the technological possibilities, it is provided with rollers fixed at the other ends of the levers, and vertical and horizontal directions yuschimi mounted on grounds hinges middle portions of the arms are arranged to telnrgo translational movement in vertical guides and rollers - relative to the horizontal guide, with: this one and the other lever arm fastened to each other with possibility of relative rotation latched.

to

 f //// Af /// ///// f

L l

Fig 2

Claims (1)

Claim The elevator drive, containing at least two pairs of two-shouldered levers, pivotally rotatable in the vertical plane connected by the middle parts to the base of the elevator, on one shoulders of which the lifting platform is located, and the others are pivotally connected between them, the hinges of the middle parts of the levers are placed with the possibility of stepping traction adjustable along the length and with a drive of their movement mounted on the base, characterized in that, in order to expand technological capabilities, it is equipped with rollers fixed on the other ends of the levers and the vertical and horizontal guides mounted on the base telnrgo movable in vertical guides and rollers - relative to the horizontal guide, with one and the other lever arm fastened to each other with possibility of relative latched 10 turns.