SU1474073A1 - Hoisting gear - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to lifting devices. The purpose of the invention is to increase labor productivity when using the device by reducing its dimensions and weight. The device consists of a frame 5, formed by tubular uprights 1 with slots 2 and supporting platforms 3 and a cross connection 4, a lever two-arm grip 6, a lifting mechanism with movable brackets 15, screws 17, a mechanical gear drive with a drive and a handle 22. For reducing the size and weight of the device on the lower shoulders 8 of the levers of the tong clamp 6 are mounted load-resistant plates 11, which take the force from the pole through the ends of the lower shoulders 8 of the levers of the tong clamp 6 and ensure the position of the upper shoulders 7, close to horizontal ntalnomu. When installing a grip on a pole, its shoulders, turning around axis 9, are simultaneously displaced in the slots of the brackets 15, providing kinematics for opening and closing the grip. To achieve the versatility of the device operation, the plates 11 have adjustment bolts 12 that open the shoulders to the desired size of the post. The screws 17 in their upper part are hingedly hinged, which increases the reliability of the grip. 1 hp f-ly, 3 ill.

Description

one

The invention relates to mechanical engineering, in particular to lifting devices.

The purpose of the invention is to increase labor productivity when using the device by reducing its dimensions and reducing its mass.

FIG. 1 shows a lifting device, a general view; in fig. 2 — node I in FIG. one; in fig. 3 - node II in FIG. one.

(The lifting device consists of tubular uprights 1, having longitudinal slits 2 and supporting platforms 3, connected by cross-linking 4 into frame 5, a two-armed lever tong 6, containing upper arms 7 and lower arms 8, levers aligned with axis 9, and rollers 10 mounted on the ends of the arms 8. On each of the lower arms 8 are load-resistant plates 11 with adjustment bolts 12, ensuring the position of the upper arms 7 of the levers, close to horizontal. Tick-grip 6 with its upper arms 7 through its axes 13 cm. The hinges in the grooves 14, made in the movable brackets 15, screwed with their threaded part 16 on the screws 17. The latter are inside the tubular uprights 1 and the hinge 18 are connected to bevel gears 19. The response gears 20 of the gear train are connected by a drive shaft 21 placed inside cross connection

4, at the end of which the drive handle 22 is fixed.

The device works as follows.

In the fully lowered position of the gripper 6, the lifting device is brought into the working position, placing it on a weight (pole) lying on the ground. The rollers 10, rolling on the surface of the column, under the weight of the device, move the lower shoulders 8 of the gripping arms 6 and the lifting device lowers onto the supporting platforms 3, lifting the pole with the ends of the lower arms 8 of the levers. The same can be done by manually lifting the gripping levers under the axle, thereby scouting the lower arms 8 of the levers to the desired span, ensuring a free installation of the tong 6 on the pole. In both cases, the levers of the tong clamp 6, turning around the axis 9 simultaneously the axes 13 of the upper arms 7 of the levers, are displaced in the slots 14 of the brackets 15, thereby eliminating the jamming of the upper shoulders and ensuring the described kinematics of opening and closing the tong clamp 6. In the working position, the handle 22 through the gear bevel gears 19 and the drive shaft 21 rotates the screws 17, thereby moving the brackets 15 upward through the slot m 2 of the tubular struts 1.

Claims (2)

1. Lifting device containing hollow racks with supporting platform 0 in the lower part, rigidly connected to each other in the upper part by a crossbar, carriages placed on racks with the possibility of moving along them, a tong-mounted grip mounted on carriages and having two double-arm hinges connected to each other, on the lower arms of which the load gripping elements, and the upper ones are connected with the drive for moving the gripper, including the drive shaft, kinematically connected with the load-bearing screw with In this case, with a nut, different from the fact that, in order to increase productivity, reduce dimensions and reduce weight, it is equipped with an additional cargo-load screw with a nut and load-resisting plates with adjustment kinematically connected to the drive shaft bolts, each of which is respectively fixed on the lower shoulder of the chagus lag5 with the ability to interact with the upper shoulder of the other lever, the contour lines of the upper arms of the levers are located on the same straight line in the transport and working position, and the load gripping elements They are made in the form of rollers, the rotation axes of which are parallel to the hinge axis of the connection of the gripping levers, while the nuts of the load-carrying screws are fixed on carriages made in the form of movable brackets, and the kinematic connection of the load-carrying bandages to the shaft includes gear teeth. 0 35 40 2. Device pop. 1, characterized in that the drive shaft is placed in the crossbar, and the load-bearing screws are in racks, each of the gears being formed by a pair of bevel gears, one of which is pivotally connected to the respective load-carrying screw. HS /five 1b 2 fig-j