SU559612A3 - Device for connecting a tractor with a tool - Google Patents

Description

one

This invention relates to an agricultural machinery industry, in particular to handicrafts for connecting a tractor with an agricultural tool.

There are known devices for connecting a tractor with a tool containing two lifting arms controlled by a hydraulic cylinder, with which a hitch hook bar kinematically connected, pivotally attached to the tractor body and cooperating in the upper end position with a spring lock 1.

A disadvantage of the known devices is that when the floating position of the spool of the hydraulic distributor controlling the lifting and lowering of the lifting levers is neutral, the weight of the working shaft and the dynamic occurs by spontaneous unlocking of the hook bar with a spring lock. This leads to unproductive time spent on re-connecting the gun with the tractor and disrupting the process.

The closest technical solution in comparison with the proposed device is a device for connecting a tractor with a bark;

mowing two controlled hydraulic cylinder; rum lifting levers with which kinematically. a bar of a coupling hook, having a groove, is attached to the lock, made on the axis of rotation of the locking device, equipped with a control lever and installed in the plate 2 mounted on the tractor body,

The disadvantage of this device is that the absence of a constant contact of the cam of the blocking device during the operation of the unit with the drawbar hook at the neutral position of the control valve spool leads to the formation of an unacceptable gap between the machined parts due to the dynamic loads of the working tool blade on the draw hook and as a result, the possibility of unlocking the coupling hook.

The purpose of the invention is to prevent unlocking of the coupling hook and to ensure that it can be locked by the driver from the tractor cab.

This is achieved by the fact that between the plate fixed on the tractor's body and the hitch hook there are mouths, an anion of the upper parts, and the axis of rotation

the locking device has three radially located levers, one of which is kinematically connected with a flexible cable to the control lever, and the other two - by means of a spring with

(WIRE.

FIG. 1 shows a device for coupling a tractor with a tool, side view; in fig. 2 - the same, on a larger scale; in fig. 3 - the same in the spatial image; figure 4 is the same, view along arrow A; in fig. 5 and 6 show the rear part of the device in different positions of the process of locking the hook hook, side view;

The device for connecting the tractor with the tool includes a plate 1 fixed to the body of the tractor 2. On the plate 1 a plate 3 is fixed, having tides 4 and 5.

In tide 5, axle 6 has a hitch hook 7, the transverse pins 8 of which are connected by means of element 9 and braces 10 of the lower longitudinal bars 11 of the attachment mechanism kinematically to two hydraulic cylinder-operated lifting levers 12. The coupling hook has a gap 13 for fastening There are the rings 14 of the working-toolbox 15, as well as the tide 16 with a groove 17 for the cam 18, made on the axis 19 of rotation of the locking device installed in the hole 20 of the tide 4 of the draw hook 7.

On the rotational axis 19 of the locking device, on one side, it is fixed with a tongue 21, an earring 22, having a radial lever 23, and on the other axis, an earring 24, having two radial levers 25 and 26. Levers. 23 and 26 are kinematically connected by springs 27 with tides 28 mounted on the body of the tractor plate 3, and the lever 25 is connected by a flexible cable 29 to the control lever 30 mounted in the tractor cab.

Plate 3 has holes 3 under the tide of 16 bars 7.

In order to fix the ring 14 of the cannon’s spacing in the throat of the hook in the opening 32 of the plate 3, a rotatable spring-loaded latch 33 is installed. At high tides 4, elastic elements 34 are installed, which in the upper locked position of the 7 hook hook, interact with the surfaces 35 of the latter.

The device works as follows. To unlock the beam 7 and connect the tractor with the working tool, the driver acts on the drive for lifting the levers 12, raising them until tbh until they take the highest position that will correspond to the contact of the surfaces 34 of the beam 7 with the bottom surface of the plate 3 and compressing the elastic elements 33 .

After that, the lever 30 is actuated and, by means of the cable 29, the output t is the cam 18 from the groove 17 of the tide 16, while lowering the levers 12 and the bar 7.

Then the tractor is fed backward to the working tool, providing the location of the hook 13 of the coupling hook under the ring 14 of the tool's blade.

After that, with the help of a hydraulic cylinder, the levers 10 and the beam 7 of the coupling hook are raised until the cam 18 under the action of the springs 27 enters the groove 17 of the tide 16 of the beam 7.

After that, the action of the hydraulic cylinder on the levers 12 is stopped. Under the action of elastic elements 34 compressed in this position, a constant down pressure occurs on the surface 35 of the beam 7, which ensures the process of the cam 18 self-fixing in the slot 17 of the beam 7 and eliminates the possibility of unlocking the latter in the spring break 27.

Claims (2)

1.Patent of France No. 1210886, cl. A01 B, 1960. 2. The patent of France No. 1479515, cl. In 60 D, 1967. "Yu (L 3 2g / / Fig 5 FIG. 6 57 /