SU1230982A1 - Telescopic hoist - Google Patents

Description

The invention relates to hoisting mechanisms, in particular to telescopic lifts.

The purpose of the invention is to increase reliability and durability.

FIG. 1 shows a schematic view of a telescopic lift, a general view; in fig. 2 - lift in the upper position; in fig. 3 shows section A-A in FIG. 2; in fig. 4 - resolution BB in FIG. 2

The device contains mounted on the base 1 fixed section 2, sliding sections 3 - 5 and

10 dits from the threaded part of the lead screw. After the end of the body 11 of the braid of the sleeve 18 begins to move from section 4. The latch 15 holding section 4 in the lower position comes out

the drive screw 6 with the drive 7. -in the bottom 15 of the groove on the screw. When the nut 10 of these ends of the telescopic sections 3 - 5 are fixed nuts 8 - 10. Nuts 9 and 10 when adjusting the device are matched in pitch with the nut 8 and rigidly fixed in housings 11 and 12. There are latches in the grooves of the nut 8 and housings 11 and 12 13 through 15, which are pressed in the radial direction by the springs 16. At the upper ends of the sections 2 through 4, there are fixed stop sleeves 17 through 19 with a splicing key 20, which exclude the turning of the sections relative to each other. The free screw sonet 6 is made with a shaped surface.

The device works as follows.

engages with screw thread,

, the latch 14 comes off the conical part of the screw and sinks into the groove of the sleeve 18 between sections 3 and 4.

20 At this moment, nuts 9 and 10 are on the threaded part of the screw. Next time nut 9 comes off the screw. Section 4 moves up the length of the screw.

25, when the screw is rotated in the opposite direction, sections 4.3 and 5 move down and successively occupy the initial position. Latches 14 and 13, hit by the lead-in chamfer

30 on the tapered surface of the spindle, pressed to the center and out of the grooves of the sleeves 18 and 17, the connector of sections 4, 3 and 5. Falls into the grooves on the spindle, latches 15 and 14 protect sections 4 and 3 from arbitrary axial movement. Motor control (turn-on, turn-off and reversal) is accomplished with the help of end

30 on the tapered surface of the spindle, pressed to the center and out of the grooves of the sleeves 18 and 17, the connector of sections 4, 3 and 5. Falling into the grooves on the spindle, the latches 15 and 14 protect sections 4 and 3 from arbitrary axial movement. Motor control (turning on, turning on and reversing) is implemented with the help of limit switches.

When the screw 6 is rotated, the nut 8, which is rigidly fixed on the lower end of section 5, is moved upwards on its threaded part: The end face of the nut 8 rests on the end face of the sleeve 17 fixed on the upper end of the section 1 and 3 and moves the latter upwards.

The latch 14 under the action of axial -fen-switches (not shown), which excludes the movement created by the screw, makes it possible for the wedging to go out along the beveled edge from the groove into the threaded gear.

ki screw. The nut 9 engages with the screw. At this moment, there are nuts 8 and 9 on the threaded part of the screw. Next time, the latch 13

comes down from the conical surface of the chrome screw under the action of the spring 16 and, westward into the groove of the sleeve 17, connects sections 5 and 3, excluding their mutual axial displacement. The nut 8 comes off the threaded part of the lead screw. After the end of the body 11 contacts the sleeve 18, section 4 begins to move. The latch 15, holding section 4 in the lower position, exits

from the groove on the screw. When the nut is 10

from the groove on the screw. When the nut is 10

engages with screw thread,

the latch 14 comes off the tapered portion of the screw and sinks into the groove of the sleeve 18, interconnected sections 3 and 4.

At this moment, nuts 9 and 10 are on the threaded part of the screw. Next time nut 9 comes off the screw. Section 4 moves up the length of the screw.

when the screw is rotated in the opposite direction, sections 4.3 and 5 move downwards and successively occupy the initial position. Latches 14 and 13, hit the lead chamfer

on the conical surface of the spindle, they are pressed to the center and out of the grooves of the sleeves 18 and 17, section 4, 3 and 5. In the grooves on the spindle, latches 15 and 14 prevent sections 4 and 3 from arbitrary axial movement. Motor control (turning on, turning on and reversing) is accomplished with the help of end

key switches (not shown), which excludes the possibility of jamming the threaded gear.

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Compiled by A.Kovalevsky Editor S.Lisina Tehred O.Gortvay Proofreader S.Shekmar

Order 2515/26 Circulation 799 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Project.na st., 4

Claims (1)

TELESCOPIC LIFT, comprising fixed and retractable vertical sections mounted on the base, a vertical drive screw and a nut · fixed in the lower part of one of the retractable sections, characterized in that, in order to increase reliability and durability, additional lower parts are fixedly fixed in the lower part of each retractable section nuts for interaction with the screw and spring latches fixed in the upper part of the nuts, while the free end of the screw is made with a shaped surface for interaction with the latches, and in The upper parts of the sections are grooves for interacting with spring latches, and the lower part of the screw is made with a groove to accommodate these nuts in the initial position. ho co about co about hO