RU2648655C2 - Bogie for jack with changing clearance - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building, in particular to lifting equipment. Bogie is a rectangular base on which a jack is mounted, fixed by four tides. On top of the base two pairs of glasses with vertical slots are placed, through which the axes with wheels with rubber tires fixed at the ends with nuts pass. Wheels are mounted on sliding bearings. In the glasses springs are installed, which at one end abut the bottom of the glass, at the second they are welded to the axes of the plate. With the springs force axle is constantly pressed against the platform, ensuring the clearance of the bogie, and the rigidity of the springs retains this position when a jack is installed.

EFFECT: it is possible to reduce labor intensity when hanging the machine with a jack.

1 cl, 1 dwg

Description

The technical solution relates to the field of engineering, in particular to lifting equipment used in various fields of activity, mainly in the maintenance and repair of tracked and wheeled vehicles.

The armored vehicle is hung out during its repair by a 30-ton jack weighing 30 kg, which is manually transferred to the vehicle. Further movement of the jack under the machine and its installation, movement after hanging the machine is carried out by the muscular power of the driver, in the "lying" position, which is difficult and inconvenient. Reducing the muscular effort of a person when using a jack to hang the machine is possible by moving the jack on wheels.

As an analogue, a mobile jacking device was considered (RU patent No. 112179. Mobile jacking device. Publ. 10.01.2012, B66F 5 \ 00, B66F 3 \ 08, В66В 7 \ 14), providing movement of the jack and consisting of a jack carriage racks mounted on it, the lifting mechanism, made in the form of a lead screw and kinematically connected to it drive and cargo nut. Moreover, the trolley contains rollers for moving the jack stand, and is equipped with a hydraulic drive kinematically connected to the rollers for their installation in transport and stationary positions, respectively. The disadvantage of the installation is the presence of a hydraulic drive that provides lifting and lowering rollers and requiring control of its tightness and the need to adjust the kinematic drive.

Known lifting means (patent RU No. 111828. Lift trolley. Publ. 12/27/2011, B62B 3 \ 06, B66F 5 \ 00, B66F 3 \ 12), containing the base, platform, nodes of movement of the lift-trolley and the lifting mechanism platforms, while the nodes of the lift-truck movement are made in the form of axles rigidly mounted in the base, ball bearings mounted on the axles, playing the role of rollers and perceiving the load during the operation of the elevator. The drawback of the lift is the presence of a kinematic chain for lifting the platform through a crank with a lever and rods pivotally connected to it.

To eliminate these shortcomings, a trolley with a varying clearance is proposed, which ensures the transportation of the jack, its automatic transfer from the transport position to the workers and vice versa, depending on the load on the jack and excludes the transmission of force to the wheels when hanging the machine.

The proposed trolley is shown in Fig 1. It is a rectangular base 1, on which a jack is mounted, fixed by four tides 7. On top of the base are two pairs of glasses 2 with vertical slots 8, through which axles 5 pass, with wheels 6 secured at the ends rubber tires fixed by nuts. The wheels are mounted on plain bearings. Springs 3 are installed in the cups, which abut against the bottom of the cup at the other end, and the plates welded to the axes of the plate 4 with the other. The axles are constantly pressed against the platform by the force of the springs, ensuring the cart clearance, and the spring stiffness maintains this position of the axles even when the jack is installed.

The order of installation and use of the device:

After installing the jack on the trolley, it rolls under the car. When the jack is “lifting”, the screw, resting on the bottom of the machine, transfers force through the jack to the base, which moves down. Under the action of the created force, the axles, overcoming the resistance of the springs, move up with the wheels, and the base drops to the floor, becoming a support for the jack. When the jack is “lowering”, the load on the screw and axles is removed, under the action of the springs, they are lowered down, moving the trolley to the transport position. After hanging the machine, it rolls out from under the machine along with the jack.

Using this device will allow:

- reduce physical stress on the driver by mechanizing the process of hanging the machine;

- reduce the time of preparatory work for the repair of armored vehicles;

- the simplicity of the design allows the device to be manufactured by the repair and restoration organ of the unit.

Claims (2)

1. A trolley for a jack with a varying clearance, consisting of a base with a lifting mechanism fixed on it, the trolley having wheels for moving, equipped with a spring suspension and a drive translating the base into transport and working positions, respectively, characterized in that the suspension consists of two pairs of glasses attached to the base and having slots that allow the axes to move in a vertical plane and, accordingly, the position of the base of the cart. 2. A trolley for a jack according to claim 1, characterized in that the position of the base of the trolley is determined by the amount of compression of the springs, that is, the force created by the jack, while, when the jack is “lifting”, the axles, overcoming the force of the springs, move with the wheels up and the base becomes the support of the jack, and when removing the load, the springs ensure the transfer of the trolley to the transport position.

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