RU190490U1 - CARRIAGE DEVICE WITH LIFTING WORK AREAS - Google Patents

Abstract

The invention relates to lifting devices, in particular, the design of the device carriage with elevating work sites for performing various technological operations, and can be used at enterprises in the manufacture, modernization and overhaul of cars and locomotives, as well as roadless vehicles. The device carriage with elevating workers platforms contains a frame fixed on it with a fixed platform and a movable platform. The fixed platform has a box-shaped cross-section, and a movable one is U-shaped. Moving the movable platform is carried out along the guides of the fixed platform by means of a rack and pinion gear, the rail of which is placed on the upper wall of the fixed platform along its longitudinal axis of symmetry. The rake is engaged with the gear shaft mounted above the fixed platform in the bearing supports on the side walls of the movable platform. To move along the guides, the movable platform is equipped with rollers. The useful model improves the operational reliability of the device carriage design with elevating work sites. 3 il.

Description

The claimed utility model relates to lifting devices, in particular, to the design of the carriage device with lifting work sites for performing various technological operations (grinding, painting, welding) and can be used at enterprises in the manufacture, modernization and overhaul of cars and locomotives, as well as road transport.

A device with lifting repair sites is known (Gypsy, B.G., Gypsy, AB. Carriage construction designs. Manufacturing, modernization, repair / Monograph, edited by B.G. Tsygan. Kremenchug, 2005. - 751 p. - P. 494 -495) containing a frame with a fixed platform fixed on it.

This design has a fixed width of repair sites, which allows you to install between them cars with only a certain width of the body. Installing a car with a larger body width is not possible, and when installing a car with a smaller body width, the distance between the body and repair platforms increases, which does not ensure safe working conditions.

The closest technical solution (adopted for the prototype) is a device with lifting work platforms (RF patent №132789 U1, B66F 11/00, publ. 09/27/2013) containing a frame with a fixed platform fixed on it with guides for moving the mobile platform P- shaped cross-section through rack and pinion.

In the known construction, the implementation of a fixed platform with a T-shaped cross section and the presence in it of a groove for a gear shaft, which is a stress concentrator, does not provide sufficient rigidity to the structure and causes the fixed platform to bend when the movable platform is extended. Attaching the rail to the bottom sheet of the fixed platform away from its longitudinal axis of symmetry leads to torsional and bending moments, which increases the load on the metal structure and guides and hampers the movement of the movable platform. The use of a ball system for moving along guides implies the application of a load at the point of contact of the ball with a guide, which, given the redistribution of load when the movable platform is extended to the extreme points of support (end balls), leads to increased specific pressures and, consequently, to increased wear of the contact surfaces , which reduces the uptime of the mechanism.

The objective of the proposal is to increase the operational reliability of the design of the device carriage with elevating work sites.

For this purpose, the device carriage with elevating working platforms contains a frame with a fixed platform fixed on it with guides for moving the movable platform of a U-shaped cross section by means of a rack and pinion gear. New is that the fixed platform is made of box-section, and on its upper wall along the longitudinal axis of symmetry there is a rack of said rack and pinion gear meshed with a gear shaft mounted above the fixed platform in the bearing supports on the side walls of the movable platform provided with rollers move along guides.

The technical result was expressed in the following.

Installing the pinion shaft above the fixed platform in the bearing supports on the side walls of the movable platform allows to ensure the solidity of the design of the fixed platform and increase its strength.

Performing a fixed box-section platform increases its rigidity.

The placement of the rail, which is engaged with the gear shaft, on the upper wall of the fixed platform along the longitudinal axis of symmetry eliminates the formation of torsional and bending moments, which leads to an improvement in the performance of the carriage.

The use of rollers to move the movable platform along the guides leads to the fact that the load is transmitted through cylindrical surfaces. Thus, the contact becomes linear, which leads to a decrease in the specific contact pressure and reduces the intensity of accumulation of wear damage.

All of this generally improves the operational reliability of the device carriage design with elevating work sites.

The accompanying drawings depict:

FIG. 1 — device carriage with elevating work platforms, side view;

FIG. 2 shows section A-A in FIG. one;

FIG. 3 - detail B in FIG. one.

The device carriage with lifting work platforms (not shown) contains the frame 1 with the fixed platform 2 fixed on it and the movable platform 3. The platforms are welded from sheets and the movable one has a U-shaped cross-section, and the fixed one is box-shaped.

Moving the movable platform is carried out along the guides 4 (Fig. 2) of the fixed platform by means of a rack and pinion transmission, the rail 5 (Fig. 3) of which is placed on the upper wall 6 of the fixed platform along its longitudinal axis of symmetry. The rail is engaged with the gear shaft 7 mounted above the fixed platform in the bearings 8 on the side walls 9 of the movable platform. The rotation of the pinion shaft is carried out using a gear motor 10 mounted on the end of the pinion shaft and fixed to the rotation on the upper wall 11 of the movable platform. To move along the guides, the movable platform is provided with rollers 12, the supports 13 of which are fixed in its side walls. The carriage works as follows.

With the help of a motor-reducer, the gear shaft rotates, which due to the rack and pinion transmission is transformed into a horizontal movement of the movable platform with a working platform fixed on it (not shown).

Changing the direction of rotation of the gear shaft leads to a change in the direction of movement of the moving platform.

Claims (1)

The device carriage with lifting work platforms, containing a frame with a fixed platform fixed on it with guides for moving the movable platform of a U-shaped cross section by means of a rack and pinion gear, characterized in that the fixed platform is made of box section, and on its upper wall along the longitudinal axis of symmetry the rail of said rack and pinion gear engaged with the gear shaft mounted above the fixed platform in the bearing supports on the side walls of the movable platforms equipped with rollers for moving along guides.

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