SU482254A1 - Device for balancing a movable body - Google Patents

Description

one

The invention relates to the field of mechanical engineering and can be used in machine tools and devices for balancing, for example, vertically moving units.

Devices are known for balancing a movable organ connected to a source of creating a balancing force by means of a guide block and a flexible link.

The described device differs from the known ones in that the guide block is kinematically connected through a self-braking transmission, for example, a worm gear, with a movement drive of the mobile unit.

At the end of the flexible coupling, opposite the guide block, an elastic link, for example a spring, is placed.

This makes it possible to improve the dynamic characteristics and reduce the metal intensity of the structure, as well as to prevent a change in the tension of the flexible coupling during operation.

FIG. 1 shows the described device, placed on a fixed node; in fig. 2 - a variant of the device located on the MOBILE site; in fig. 3 is a section along A-A in FIG. 12.

The device can be located either on Plate 1, rigidly connected with a fixed unit 2 (see Fig. 1), or on a vertically moving unit 3 (see Fig. 2). The device includes a flexible element 4 with an elastic link 5 mounted on a block 6 located on one shaft 7 with a worm gear 8 engaging with a screw 9 which is rigidly connected to the shaft 10. At one end of the shaft there is an engine 11 from the other end is a gear wheel 12 engaging with the wheel 13 fixed either on the lead screw 14, having Supports 15, 16 (see Fig. 1), or on the nut 17 located in the housing 18 (see Fig. 2 ).

The described device operates as follows.

A flexible link 4, fixed at one end through an elastic link 5 at the movable node 3 (see Fig. 2) or at the fixed node 2 (see Fig. 1), with the other end attached at block 6, while tension is being made flexible coupling with a predetermined force. In this way, a vertically moving unit 3 is balanced, since its weight is transferred to the fixed unit 2. Due to the fact that the worm gear 8, 9 is self-braking, the unit cannot rotate and the tension of the flexible link does not change. is. The rotation from the engine 11 through the shaft 10 and the gears 12, 13 is transmitted either to the rotating spindle 14 if the device is mounted on a fixed unit — in this case, the nut 17 is rigidly fixed in the housing 18 (see Fig. 1), or on the nut 17, rotating in the housing 18, if the device is located on the MOBILE node (see Fig. 2) —the screw is in this case fixed. At the same time, through the worm gear 9, 8 and the shaft 7, the impingement is transmitted to the block 6. As the flexible coupling is pulled out during operation, and the details of the device and the drive wear out, the tension of the flexible link 4 changes. In order to minimize this change, an elastic element 5, such as a spring, is provided in the device.

The device can also be used to balance nodes moving obliquely.

Subject invention

Claims (2)

1. A device for balancing a movable organ connected to a source of creating a balancing force by means of a guide block and a flexible link, characterized in that, in order to improve the dynamic characteristics and reduce the metal intensity of the structure, the guide block is kinematically connected through a self-braking transmission, e. 2. The device according to claim 1, characterized in that, in order to prevent the tension of the flexible connection from changing during operation, an elastic element, for example a spring, is placed at the end of the flexible connection opposite the guide block. eleven - -J Phi 1 FIG. 2 A-A y // 7 /// 7 // A / y77A /// / / / V /, L.L./ / Thebes .d