RU2819530C1 - Movable end handle on shovel or pitchfork handle - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to hand tools for household shovels. End handle for handle of hand tool in the form of a shovel or pitchfork includes a U-shaped body and a bushing part. Handle is equipped with a hinge consisting of upper and lower parts in the form of blind bushings. At the same time the upper bushing is made with a semicircular protrusion with a hole and ribbed plates arranged on its outer wall for fitting into the bushing part of the handle. Lower bushing is made with two protrusions with holes; at that, both bushings are connected by means of a screw or a cotter pin through the protrusion holes with the possibility of the handle rotation perpendicular to the tool plane.

EFFECT: use of the invention will make it possible to increase labour productivity and reduce worker fatigue.

1 cl, 5 dwg

Description

The invention relates to hand tools for household purposes and is used mainly in agriculture for loosening soil and harvesting root crops, mainly potatoes, in construction organizations for digging trenches and holes, as well as in the Armed Forces of the Russian Federation for digging trenches and where manual labor using the above tool.

There are end handles on the handle of shovels of different designs, for example in the form of a “T” shape with the axis of the handle located in the plane of the tool. The disadvantage of such structures is that they are mounted in one position and at a certain diameter of the imp. Their location is not always convenient, and their work is ineffective. The prototype of the end handle was taken from the invention GB 2282095 A (TRUE TEMPER) 03/29/1995. In its design, like its analogues, the handle and the axis of the handle are located in the plane of the tool. In the variety of sizes for the handle seat, you have to choose the required handle diameter for it. This type of pen is difficult to make. It is more material-intensive and heavier. In the production process, the range of heterogeneous materials used, the number of parts and the number of components increases. It only prevents rubbing of the palm.

The proposed movable end handle for the handle of shovels and forks consists of a U-shaped body 1 and a hinge D. Hinge D consists of an upper part 2 and a lower part 3 (See Fig. 1, 2). The upper part 2 of the hinge D is made in the form of a blind bushing with a semicircular protrusion K with a hole O placed on it. On the outer wall of the bushing surface there are ribbed strips C. The lower part 3 of the hinge D is also made in the form of a blind bushing with two protrusions K' placed on it with holes O' with a size between them equal to the size of the protrusion K of the upper part 2 of the hinge D, taking into account the sliding fit (See Fig. 2, 3).

Assembling parts 2 and 3 of hinge D of the proposed design and fitting it onto the end of handle A is carried out by selecting the required size of part 2 of hinge D. For this purpose, the ribbed strip C is cut off along the depressions of the ribs of the strip C with any cutter, then with an interference fit it is inserted into the sleeve part of the body handle 1 and is fastened with a self-tapping screw 5. Part 3 of the hinge D with its bushing part is mounted on the end of the handle in the same way as the lower end of the handle A is mounted on the bushing part of the tool of shovels, forks and is fastened with a self-tapping screw 5. Why is the seat of the bushing part of part 3 of the ball D intended to be made to the minimum cutting size. The connection of parts 2 and part 3 of the hinge D is carried out by a screw connection or a cotter pin 4 through the holes O O and O' O' (See Fig. 1, 2, 3).

The design feature of the proposed movable end handle is that it has a number of advantages over the prototype. The handle with body 1 is made of one piece and is reliable. It is easier to manufacture, because A homogeneous plastic material is used, and the hinge D with the handle body 1 is obtained by automatic casting, in one mold. The proposed handle is lightweight, which also helps to produce the product at a low cost. Reliable simple fastening of the movable handle to any handle of different diameters with its placement perpendicular to the plane of the tool, and using the hinge D allows you not to rub the palm of the worker’s hand. Here the palm is directed towards the body, and not turned out. In such a comfortable physiological, natural position, the hand is able to take more loads and get less tired. The worker holds it tighter.

In FIG. 4, 5 show tools A and B pressed into the ground with the handle axes “a” and “c” in their initial, initial position. Here, on the upper end of the handle of tool A, the proposed movable handle with a hinge D is mounted. For tool A, the “a” axis of the sleeve part and the handle is located at an angle to the plane, and for tool B, the “c” axis is in the plane. The proposed movable end handle of the body 1 with the handle axis “b” allows you to use tool A when loosening the soil. With such a tool, work efficiency increases compared to tool B, because the exerted efforts occur in a comfortable, standing position. The final, lower position of the handle of the tool A with the axis “a'” and the movable end handle with a hinge D is above the ground at a distance L, and the handle of the handle B with the axis “c’” is at a distance 1. Here the angle F is between the axes “a” " and "a'" - this is the zone F of the movement of the tool handle A, and the movement of the proposed handle, in this case, is in the Z zone and will be reduced by the amount X + X. The movement of the tool handle B is in zone f (See Fig. 5). The increased stroke of movement of the handle of tool A compared to the stroke of movement of the handle of tool B also increases the stroke of movement of the lower part of tool A compared to the lower part of tool B, located in the ground, respectively. Here, the worker using tool A with a mounted movable end handle, without bending, spends less effort on tearing off and lifting a layer of earth to the surface compared to using tool B with a mounted handle from a number of analogues. The proposed movable end handle can be used mounted on the handle of tools A and B in any position and be stationary. A new technical solution allows increasing labor productivity with less fatigue.

Thus, the claimed technical solution meets the “Novelty” criterion. An analysis of known technical solutions (analogues) in the area under study, in particular farming on personal plots, dachas, vegetable gardens, associated with the use of fork shovels, allows us to conclude that they do not contain features similar to the essential distinctive features in the declared design, and recognize the declared technical solution to the “Significant differences” criterion.

Claims (1)

An end handle for the handle of a hand tool in the form of a shovel or fork, including a U-shaped body and a bushing part, characterized in that it is equipped with a hinge consisting of upper and lower parts in the form of blind bushings, while the upper bushing is made with a semicircular protrusion with a hole and ribbed strips of variable size located on its outer wall for fitting into the sleeve part of the handle, and the lower sleeve is made with two protrusions with holes, both sleeves are connected by a screw or cotter pin through the holes of the protrusions with the possibility of rotating the handle perpendicular to the plane of the tool.