ES2234339B1 - MODIFICATION OF THE LINK IN THE WORK SYSTEM BRACKET SUPPORT-GRILLE. - Google Patents

Abstract

Modification of the link in the support arm - grid work system. In agricultural implements called excisers, whose task is the cleft of the land, the work system is constituted by a fence attached to a support arm, which in turn is fixed to the frame of the implement; several of these units, (gate - arm), make up the exciser. The modification of the link is a totally new design of the elements that integrate it so that the presence of screws becomes superfluous as essential elements for the union and transmission of the efforts of the fence to the support arm, since both are in his task of splitting the earth. The arm adopts, in its terminal portion, a form of curvilinear trapezoidal prism, with a beveled portion in the upper inner part that allows the sliding of a pin. The fence ceases to be attached to the arm by means of screws to act as its envelope, which will allow the forces of cohesion of the metal that constitutes it to counteract the efforts to which it is subjected in its function of splitting the earth.

Description

Modified link of the arm system grid support.

In the metallurgical sector of components for agricultural implements called extirpators, - whose essential function is to split the earth - the work system consists of an arm support, fixed to a frame, which has a grid. The way of fixing the fence and the support arm is the screw, usually two that, in addition to making the union of the two elements, fence - arm, supports the efforts that it He experiences in his work of splitting the earth.

Everything we express is clearly shown in page 7, where system components can be distinguished of work.

1 - support arm

2 - gate

3 - cavities for insertion of screws

When due to wear on its friction with the earth the fence needs to be replaced, it is necessary that the screws that keep it attached to the arm are in good shape condition; otherwise, the gate removal operation worn and its replacement by a new one is not exempt from penalties for the operator who proceeds to change it.

With the modification of the link we propose all kinds of difficulty disappear because the operation of removal of the worn element consists of removing a small Barrette.

Background

On more complex machines than excisers agrarian, such as rippers, excavators, etc., whose role in some occasions is the cleft of the earth, the element that in them exerts the function of the fence of agricultural implements, - nails, leggings, etc. -, is coupled around the support, wrapping it entirely.

Your stay in the work position is guaranteed by a pin or pin that crosses both, nail and support.

At the time of replacement to place new ones, - we talk about the nails -, only the withdrawal is necessary previous pin.

The work system we intend to adopt for our agrarian extirpators it has some similarity with the operation and replacement of the elements, -nails-, than in the heavy machines act as grating in the cleft of the land.

Description

The modified link of the arm work system support - grating is a totally new design of the elements that they make it up and it makes unnecessary the presence of screws like essential pieces of union and transmission of the efforts to be Support the system. When changing the shape of the components, it superfluous shows the presence of supporting elements other than a modest pin.

A sectional view of the profile of the new system, which clearly distinguishes the three components thereof:

1 - support arm of new design.

2 - New design fence.

3 - hole for pin placement.

In the new design the support arm adopts in its terminal portion a form of curvilinear trapezoidal prism, very away from the ordinary section (square, rectangular, etc.) that carries from its union to the implement frame.

In the upper inner part of this thickening in trapezoidal prism, there is a bevelled portion that It will allow the sliding of a pin. Pin that will guarantee the permanence of the fence in contact with the support when the system is not in working position.

A profile view is shown on page 9 (Fig. 1) of the terminal portion of the support arm, in which they have been Two sections indicated, which are shown enlarged. The section A 'allows us to appreciate the gap through which it will slide the pin; section B B 'shows us the form of curvilinear trapezoidal prism adopted by the arm.

The gate, in the modified system link support arm - grating, will cease to be a more or less plate curvilinear attached to the arm using screws to become, in one of its portions, in envelope thereof. In the junction zone with the arm, the fence will wrap him by three of his faces, the back side being open.

At the top of the junction zone of both, gate - arm, the gate is provided with a hole for the placement of the pin that will guarantee its union with the support provided the system is out of the working position.

When, on the contrary, the set grates - arm is in its function of land splitting, the new design of the fence will make it press against the arm.

Profile and profile views are offered on page 10 Front of the new design fence. They are respectively the figures 1 and 2 of the mentioned page.

More illustration on the new fence design is offered on page 11, where your profile is displayed again and Three sections of it.

Section P P 'shows the placement area of the pin that will slide through the bevelled area of the new arm support. (See section A A 'on page 9).

Section E E 'shows the constitution of the grating in its lower portion that, in working position, will go buried in the earth.

Section C C 'finally shows the zone of contact of the new fence with the new design support arm. In This section shows, (in true magnitude), the elements essentials of the new system: the envelope portion of the fence that will embrace the modified arm terminal (a, in the figure) and in the reinforcement center, - r -, central of the new fence that will make butt against the arm when both are in their creasing work of the earth.

This design change, both in the portion arm terminal as in the new fence as the envelope of the it will allow us to move from the traditional system in which the support and communicator of efforts is the screw, to another in which  the shear forces experienced by the fence are compensated by the forces inherent in the metal itself: the forces of cohesion.

On page 12 you can see the essence of the change. In figs. 1 and 2 the traditional system of union of fence and arm; in fig. 3 shows the performance of the forces of cohesion and in fig. 4 the profile of the new ones is presented designs and their union by a pin P.

Manufacturing

It is not difficult for the metallurgical industry of components for agrarian extirpators obtaining both modified system elements of work arm support - grid.

The special shape of the terminal portion of the support arm can be obtained by welding and grinding of elements that determine the thickening and the portion beveled

It can also be obtained by forging in hot from steel.

A final procedure of obtaining would be the foundry.

The new design of the fence with its shapes section changers recommend obtaining it by casting Some special kind of steel.

Claims (1)

1. We have indicated in the introduction that, in the metallurgical sector of components for agricultural implements called excisers, the work system consisted of a support arm fixed to a frame, which had at its end a grille fastened by two screws. The excisers carry several of these systems arm - grating, which in working position serve to split the land. We have also explained that at the time of replace the worn element, usually the fence, the wrong state of the screws that attach it to the arm can produce no few penalties to the user, in addition to demanding various tools: keys, saws, etc., and a considerable amount of weather. With the modified link of the arm system support - gate we get: 1 - reduce the joining elements of the system to A simple lift pin. This determines that by not existing the bolts as an element of fear disappear and loss of user time for the replacement of same. 2 - with the proposed new design for both the terminal portion of the arm as for the fence, acting as envelope of that, we eliminate the need for elements strangers for the transmission of the efforts that would support the fence  in working position. The cohesion forces of the metal itself fence would counteract the shear forces that it should put up with. Cohesion forces that would be complemented by the lift pin reaction.