RU33350U1 - Cable assembly for powering electric trucks - Google Patents

Description

12003105629

(10,310 $ 2

Cable assembly for powering electric forklifts.

The proposed utility model relates to hoisting machinery, namely, to a cable-powered electric forklift used in loading, unloading, transport and storage operations and can be used in other industries on cable-powered machines and mechanisms.

Known cable assembly device for electric forklifts with spring-pulley drive, see book. Loaders. Ed. G.P. Efimova. M.: Transport, 1989, p. 117. The cable assembly device consists of a cable drum, three current collectors, two cassettes with springs, a carrier and a cable. When the loader moves, the cable wraps around the drum (under the action of springs) or unwinds. The springs are fixed in cassettes, provide a cable tension force. The carrier rotates in bearings around a vertical axis with the current collector. To collect the cable used a smooth drum of small length, on which the cable is located in several layers. When winding the cable from the drum, a small drum is brought into rotation with the help of two pairs of cylindrical gears, onto which the wire rope of the chain hoist fixed on it by one end is wound. Due to the contraction of the latter, two cylindrical springs are placed between the metal plates, of which the lower one is movable. The second end of the cord is fixed to the upper fixed plate.

MPKV60M1 / 00

-2If the electric forklift approaches the cable curtain rail located along the warehouse, its tension relaxes, the springs open, the pulley blocks move down with the simultaneous rotation of the drum by pulling the rope from it. As a result, the cable drum comes into rotation, and the cable is wound. To prevent breakage of the flexible cable when it is unwound, when at least 1.5 turns remain on the drum, the power supply automatically stops.

The spring-pulley mechanism is complex in design, has an inertia in operation and insufficient cable capacity, and also does not provide uniform tension in extreme positions, since the springs are compressed and unclenched, in addition, during operation, the characteristics of the springs change, the power cable sags, which requires periodic tension adjustment.

The closest analogue in technical essence and the achieved effect is a cable assembly device, see book. Loaders. Ed. G.P. Efimova. M .: Transport, 1989, p. 114, consisting of a cable carrier, a rotary device, a cable assembly drum connected by two pairs of gears with an electric motor shaft. At the same time, resistances are introduced into the electric circuit of the rotor of the electric motor to create a braking mode that provides cable tension. The drum and the supply unit rotate in two mutually perpendicular axes, for which two ring current collectors are installed.

The disadvantages of this device are the complexity and unreliability of the design, the possibility of cable breakage due to jerks when the motor is turned on and the presence of a complex control circuit for the latter. Thus, the operation of this device is unreliable and inefficient.

The technical task of the proposed utility model is to increase reliability and operational efficiency by simplifying the design and creating a constant tension force on the cable assembly drum of the current-carrying cable.

The problem is solved in the following way. In the cable assembly device for powering the electric forklift, including a base with a casing and supports, on which the cable assembly drum with a current collector, an electric drive and a cable carrier are mounted, the electric drive is made in the form of a spiroid motor gearbox and connected to the cable assembly drum through a friction clutch, while the current collector is made in the form of rolling bearings.

During operation of the drive, the friction clutch due to slipping allows you to maintain a constant cable tension regardless of the direction and speed of the loader, which greatly increases the durability of the cable. The listed properties make it possible to significantly simplify the design of the device and increase its reliability, durability and efficiency.

The essence of the technical solution is illustrated by an example of a specific design and drawings. In FIG. 1 shows a cable assembly for powering an electric lift truck, a plan view; FIG. 2 is a view A in FIG. 1; FIG. 3 location of the device on the electric lift truck.

The cable assembly device for powering the electric forklift from a three-phase stationary power supply network includes a base 1 with supports 2 and a casing 3, in which a cable assembly drum 4 with a slip ring assembly 5 consisting of rolling bearings 6 is mounted on the shaft, connected to an electric drive 7 made in the form of a spirod gear reducer through a friction sleeve 8, carrier cable 9 and cable 10.

-4When mounting the cable assembly device on an electric lift truck in the battery compartment (Fig. 3), the current collector is wired and the friction clutch 8 is adjusted to the required cable tension 10 depending on its type and length. After installation and adjustment, the device is ready for operation.

When the motor 7 is turned on, the torque is transmitted through the friction clutch 8 to the shaft of the cable assembly drum 4 and the collector assembly 5. The drum, rotating, winds the cable 10 onto itself. The end of the cable 10 is rigidly fixed to the drum 4 and the collector assembly 5, from where power is supplied to the electric forklift . Upon reaching the specified tension of the cable 10, the friction clutch 8 slips. The unwinding of the cable from the drum is made by the movement of the loader due to slipping of the friction clutch.

Unlike the prototype, the cable is wound and wound with the same tension, regardless of the direction and speed of the loader.

The collector assembly 5 is made in the form of rolling bearings 6 mounted on the electrically insulated part of the shaft of the cable assembly drum 4, which allows to simplify the design of the assembly, increase durability and reduce operating costs.

From the foregoing it follows that the design of the cable assembly device is much simpler, more reliable, unwinds and unwinds the cable with the same tension, regardless of the position of the electric forklift, which means it increases the efficiency and durability of the device.

Claims (2)

1. Cable assembly for powering electric forklifts, including a base with a casing and supports, cable assembly drum with a slip ring assembly, an electric drive and a cable carrier, characterized in that the electric drive is made in the form of a spiroid motor gearbox and connected to the cable assembly drum through a friction clutch. 2. The device according to claim 1, characterized in that the collector assembly is made in the form of rolling bearings.