SU1299955A2 - Cargo-equalizing spring balance - Google Patents

Abstract

The invention relates to load balancers. The aim of the invention is to provide smooth, stepless adjustment to different load capacities. The device consists of a housing 1 with a fixed lid 2, inside of which a shaft-gear 4 is mounted on bearings 3 on which a conical drum 5 sits. In the drum 5 a worm is mounted to 6, which serves to twist the set of spiral springs (SP) 7, which are energy carrier. The joint venture is fixed on the inner side on the sleeves 8 having internal slots, and on the outer side through the cup 10 and the cover 2 on the housing 1. The mechanism for turning on (off) the joint venture consists of coupling halves that are articulated into a coupling by means of a spring ring. The coupling halves are made from the outside (L with so con ate fsj FIG.

Description

splined and mounted on gear shaft 4 with axial movement using a handle 15. One of the coupling halves is connected to the drum 5, and the other coupling half is connected to the housing 1 via a spline ring 18. The device is also equipped with a mechanism for smoothly adjusting the rigidity of the joint venture due to change their working length. It consists of a spiral sleeve 19, having a cutout and mounted on the cover 2 with the possibility of rotation. At the end of the sleeve 19, there is a scraper-ph 20, which meshes with the gear 21 and carries the handle 22, which serves to drive the

The invention relates to the mechanization of hoisting operations and is intended to balance suspended loads of any weight within the load capacity of the alansier.

The aim of the invention is to provide a smooth, stepless adjustment for the various lifting capacities.

FIG. 1 shows the balancer, the general ID; in fig. 2 is a section A-A in FIG. one; in fig. 3 - Spiral sleeve with a notch.

The balance bar consists of a housing 1 with a fixed cover 2, inside of which a shaft-gear 4 is mounted on bearings 3 on which a conical drum 5 sits. In a conical drum 5 there is a worm to 6, which serves to twist to the nominal moment of the balancing mechanism that comes with spiral springs 7, which are the energy carrier. The spiral springs 7 are internally fastened to bushings 8 having internal splines 9, and from the outer side through the cup 10 and the lid 2 are rigidly fixed to the housing 1. For discrete adjustment of the working width of the spiral springs 7 when the weight of the suspended load changes by changing the number of workers The spring in the balancer has a mechanism for switching on (off) the operation of the spiral springs. This mechanism consists of coupling halves 11 and 12, which are hingedly connected to the coupling by means of a spring ring 13. The coupling halves 11 and 12 are made with the outer splines 14 and are mounted on the gear shaft 4 with the possibility of axial movement by the handle 15 through a pin 16. The coupling half 11 is connected rotatably with a tapered drum 5 with a key 17, and the coupling half 12 with external spline gauges of smoothly adjusting the stiffness of the joint venture during rotation. In the cutout of the sleeve 19 missed the turn of each of the joint venture. By switching the number of springs with knob 15, the amount at which the balance weight carrying capacity is higher than the weight of the suspended load (the load rises to the upper position) is found. After that, the handle 15 reduces the number of operating springs by one, the load is lowered down, and rotating the handle 2 reduces the length of the operating springs by cutting off the number of working turns by the spiral sleeve 19 until the load is balanced. 3 il.

14 is connected to housing 1 through a spline ring 18 with internal splines similar to those of splines 9. For smooth adjustment, the proposed balance bar is equipped with a mechanism for smooth adjustment of spring stiffness by varying the working length of the springs. It consists of a spiral sleeve 19, which has a notch into which a coil of each of the spiral springs 7 is missed, and which is mounted on the rocker cover 2 so that it can be rotated. At the end of the sleeve 19, adjacent to the lid of the balance bar, gear 20 is provided, which engages with pinion gear 21, is mounted on the cover 2 and has a handle 22 on the outside of the lid that serves to drive the spring stiffness adjustment mechanism. As is well known, the carrying capacity of a balance ball depends on the spring stiffness in the following relationship:

Mr. J / 3f iEibj h

 E is the modulus of elasticity of the material of the spring;

b - spring width;

h is the height of the spring;

E is the length of the spring;

t-pitch cable laying on a tapered drum; ° C tilt angle of the cone drum;

G is the mass of the load that is balanced by the spring.

It follows from the formula that an increase in the spring width b leads to an increase in the load capacity. It also follows that a decrease in the working length leads to an increase in the spring stiffness and, accordingly,

to an increase in the load capacity of the balancer.

The balancer works as follows.

A weight is suspended on the balancer, but using handle 15 determines the range of the number of springs in the set, i.e., switching the number of springs, find the amount at which the balance weight carrying capacity is higher than the weight of the suspended load (the load rises to the upper position). After this, the handle 15 reduces the number of operating springs by one, the load is lowered, and by rotating the handle 22, the length of the operating springs is reduced by cutting off the number of working turns by the spiral sleeve 19 until the load is balanced.

Claims (1)

Invention Formula Load balance spring balancer auth. St. No. 1222620, characterized in that, in order to provide a smooth, stepless adjustment for different load capacities, it is provided with a stiffness adjuster of the spiral springs of the balancing mechanism, made in the form of a spiral sleeve with a cutout through which the coil of each of the spiral springs is passed, and this sleeve is installed on fixed cover rocker can be rotated around the axis of rotation of the drum shaft by means of a manual drive. Aa one J3 77 YU 20 FIG. 2 FIG. five