SU1763341A1 - Magnetic hoisting device - Google Patents

Abstract

Use: in the lifting and transport equipment, including in permanent magnet lifting devices. SUMMARY OF THE INVENTION: The device comprises a housing 1 with magnetic blocks fixed 2, movable 3. The movable blocks have a common power shaft 4 on which the ratchets are rigidly fixed and the gears with ratchet dogs are freely mounted. Cargo suspension 11 has toothed racks that come into contact with gears, rails 14 are rigidly mounted on the toothed rails with power springs supported on element 16 of housing 1. The device has an increased lifting capacity and ensures that there is no spontaneous disconnection of movable magnetic blocks at the time of carrying goods . 5 il.

Description

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The invention relates to lifting and transport equipment, in particular, permanent magnet lifting devices, and can be used in cutting and preparation shops for loading metal-rolls and blanks.

A load gripping device is known in which the housing is made with an additional magnetic conductive wall located parallel to the first one, the device is equipped with an additional permanent magnet and a rotating magnetic unit placed between the outer wall of the housing and the additional magnetic conductive wall, with all the same magnets facing each other. to a friend, and the additional rotary block is offset in height relative to the main rotary magnetic block by an amount not larger than its diameter. To jointly rotate the magnetic blocks, gears are provided that are mounted on the ends of the rotary magnetic blocks that engage with the drive gear connected to the displacement handle. A disadvantage of the known device is the manual control of opening and closing magnetic fluxes and the impossibility of the device operating in automatic mode,

A magnetic lifting device containing a movable and stationary magnetic blocks, a mechanism for controlling and closing the magnetic flux, operating at the expense of the device’s own weight, consisting of a spring-loaded suspension with gear racks interacting with the toothed sectors, is articulated Zannaya with them and with magnetic blocks swivel levers with damping elements. However, the load capacity per unit weight of the device has low values, since the mechanism for controlling the closing and opening of the magnetic flux works only from the suspension spring, which is driven upwards while the suspension moves, while the force characteristic of the spring depends on its own weight of the lifting device. In the switched on position of the magnetic system, the movable magnetic unit tends to self-deactivate, for which the design provides damping elements made in the form of spring-loaded fingers.

The purpose of the invention is to increase the carrying capacity, to eliminate the spontaneous disconnection of the moving blocks from

permanent magnets at the time of carrying goods.

The goal is achieved by the fact that in a magnetic lifting device, comprising a housing with fixed and stationary blocks with permanent magnets installed in it, a mechanism for controlling the circuit and opening of the magnetic flux, including spring-loaded

0 suspension with gear racks interacting with gear wheels, freely mounted on the power shaft, ratchets rigidly connected to the power shaft, spring loaded ratchet dogs,

5 mounted rotatably on gears and with the possibility of engagement with ratchets, the control mechanism is made in the form of a non-reversible power shaft, the gear racks are spaced apart

0 by the size of the pitch diameter of the gears and interact with the diametrically opposite sides of the gears, and the ratchet teeth and spring-loaded ratchet dogs are positioned so that

5 provides alternate transfer of force for rotation of the non-reversible power shaft in one direction during each course of the gear racks by an amount corresponding to half the movement path of the movable magnetic blocks with permanent magnets required for switching the device. Complete elimination of the spontaneous disconnection of the magnetic blocks at the moment of lifting and transfer freight

5 is achieved due to the fact that the power shaft is rotated in one direction and it is completely locked in the position of the magnetic system with the extreme upper position of the racks.

0 FIG. 1 shows an embodiment of a device with a swiveling movable magnetic unit, a general view; in fig. 2 - section A-A, B-B in FIG. one; in fig. 3 - position of the movable magnetic system with

5 operation of the control mechanism; in fig. 4 shows an embodiment of a device with flat movable magnetic blocks (section B-B in FIG. 5); in fig. 5 is a section of YYD in FIG. four,

0 The module of the magnetic load gripping device consists of the housing 1, in which fixed magnetic blocks 2 and movable magnetic blocks 3 are installed. Movable magnetic blocks have a common

5 power shaft 4, rigid ratchets 5, b are mounted on power shaft 4, gears 7, 8 with ratchet pawns 9, 10 are freely mounted on the same shaft 4. Suspensions 11 that come into contact with gear wheels 7, 8 have gear racks

12, 13, on which the guides 14 are rigidly mounted with force springs 15 supported on the element 16 of the housing 1. In the device according to the embodiment of FIG. 4 movable magnetic blocks are connected to the power shaft 4 by means of a system of levers and mr 17.

The devices work as follows.

In a lifting device suspended from a hook, under the action of its own weight of the spring 15 of the system, the suspension 11 is in its extreme upper position. When the device is mounted on a load by the action of springs 15 and the dead weight of the suspension 11, the gear racks 12, 13 move downward, interact with the gear wheels 7, 8, with one gear wheel 8 rotating clockwise and the other 7 counter-clockwise, the dog 10 slips along the ratchet 6, the dog 9 comes into contact with the ratchet 5 and turns the power shaft 4 by an amount 1/2 of the movement path of the movable magnetic unit. When lifting the device by the suspension 11, the pawl 9 slides along the ratchet 5, the gear wheel 7 rotates freely on the shaft 4, and the pawl 10 comes into contact with the ratchet 6 and rotates the power shaft by 1/2 the movement path of the movable magnetic unit. When the suspension moves up to the extreme upper position, the springs 15 are compressed and the peak characteristic of the magnetic system in the Enabled position helps not only the weight of the device itself, but also the weight of the attracted load, the self-deactivation of the magnetic system is completely excluded because the ratchet , dogs, gears and rails. In this position, the transfer of cargo.

Automatic reset of the parts is as follows.

As soon as the device with the load is lowered to the place of unloading, the suspension 11 moves down by means of springs 15 and its own weight, the dog 9 comes into contact with the ratchet 5, and the dog 10 slides freely over the ratchet 6, the power shaft 4 turns 1/2 of the movement path of the movable the magnetic block from the On position and takes the position corresponding to 90 (see Fig. 3). When lifting the device, the suspension 11 moves upwards, the dog 10 comes into contact with the ratchet 6, turns the power shaft 4 1/2 of the movement path of the movable blockade of the position of 180 °, which corresponds to the complete deactivation of the magnetic system, while the load remains at the place of unloading,

and the device moves to the pickup point of the next load, the cycle repeats. Since the magnetic system always tends to disconnect itself, when turning off the magnetic system, additional turning forces

or movement of the movable magnetic unit is not required. The magnetic module is easy to manufacture and reliable in operation.

Claims (1)

Invention Formula A magnetic load gripping device comprising a housing with movable and fixed blocks with permanent magnets installed in it, a mechanism for controlling and closing the magnetic flux, including a spring-loaded suspension with gear racks, interacting with gear wheels freely mounted on the power shaft, ratchets rigidly connected with said power shaft, spring loaded ratchet paws mounted rotatably on gears and engaged with ratchets, characterized in that with in order to increase capacity, eliminate spontaneous disconnection of moving blocks with permanent magnets at the time of carrying loads, the control mechanism is made in the form of an irreversible power shaft, the gear racks are separated by the size of the pitch diameter of gear wheels and interact with the diametrically opposite sides of gear wheels, and the ratchet tooth and spring-loaded ratchet paws are positioned so that alternate force transfer is provided to rotate said irreversible power shaft into one direction with each course of the rack racks a value corresponding to half the path of movement of the moving magnetic blocks with permanent magnets, necessary for switching the device. in-in 2 PA “0 oh well P 90 ° 1D01 PAP 270 B-ff 9igZ Fig4 gd 12 6 8 S 7  A I / I FI.5