GRAIN CART WITH ACCESS AND SAFETY ELEMENT FOR MAINTENANCE, INSPECTION OR CLEANING OPERATOR

Abstract

Disclosed is a grain cart having an inverted V-shaped ridge on top of the cover of the flow gate system to reduce the grain load on the blades and the force required to move them. The ridge includes supports for a walkway that provides safety to cleaning, inspection and maintenance personnel for mechanisms at the bottom of the hopper, in particular the sweep auger and the flow gate system, without affecting the unloading rate. Such supports include a series of inverted V-shaped plates placed on edge to reduce the obstruction to the passage of grains, the plates having a horizontal upper web that forms a non-slip surface for the operator to walk on the walkway. The ridge with walkway only occupies the central portion of the ridge, leaving a free area towards the sides that allows the free passage of grains and pellets of compacted wet grain during unloading.

Claims

1. A grain cart with an access and safety element for a maintenance, inspection or cleaning operator, and with side walls extending longitudinally between end walls and inclined inwards and downwards towards a bottom on which it is located, arranged horizontally, a longitudinal conveyor device on which, in turn, there is a device flow gate, guillotine type or similar mechanism that regulates the passage of grain material in the hopper towards the longitudinal conveyor device, wherein said safety element comprises a walkway arranged longitudinally on the passage regulating device.

2. The grain cart according to claim 1, wherein the walkway is segmented into sections.

3. The grain cart according to claim 1, wherein the walkway is continuous.

4. The grain cart according to claim 1, wherein the walkway is formed by an upper face of a ridge arranged longitudinally on the passage regulating device.

5. The grain cart according to claim 4, comprising an open space left between the ridge and the sides of the hopper for the flow of grain material during unloading.

6. The grain cart according to claim 4, wherein the passage regulating device comprises a cover suspended on a longitudinal conveyor apparatus and that has slidable blades mounted, and in that the ridge is suspended on the passage regulating device and, in turn, supports a succession of plates arranged on edge and spaced from one another by way of gantries, the plates being formed with flat horizontal upper edges that make up said walkway.

7. The grain cart according to claim 6, wherein the ridge has an inverted “V” shape and said plates include side wings that replicates this inverted V shape.

8. The grain cart according to claim 6, wherein the horizontal upper edges of the plates are shaped with serrations to improve the non-slip property of the walkway.

9. The grain cart according to claim 6, wherein the walkway includes a platform fastened to said arrangement of plates.

10. The grain cart according to claim 1, wherein the walkway includes a platform supported by supports fastened to the side walls of the hopper.

11. The grain cart according to claim 9, wherein said platform comprises two side beams joined by an arrangement of crossbeams interposed between a series of plates such that the upper edges of said plates and the crossbeams form a non-slip surface of the walkway.

12. The grain cart according to claim 10, wherein said platform comprises two side beams joined by an arrangement of crossbeams interposed between a series of plates such that the upper edges of said plates and the crossbeams form a non-slip surface of the walkway.

13. The grain cart according to claim 1, wherein said longitudinal conveyor apparatus comprises a sweep auger arranged horizontally, said hopper further including a grain auger or lift auger at the end of the hopper below said sweep auger.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0017] In order to provide greater clarity and understanding of the object of the present invention, it has been illustrated in several figures, in which the invention has been represented in one of the preferred embodiments, all by way of example, wherein:

[0018] FIG. 1 is a side elevation view of a grain cart of the type to which the present invention is applied.

[0019] FIG. 2 is a rear perspective view of a grain cart provided therein with a ridge with a walkway according to a preferred embodiment of the present invention.

[0020] FIG. 3A is a cross-sectional view of the grain cart according to plane A-A of FIG. 1.

[0021] FIG. 3B is a magnified view of detail B of FIG. 3A corresponding to the ridge with a walkway.

[0022] FIG. 4 is a perspective view of the ridge with a walkway of FIGS. 2 and 3 according to a preferred embodiment of the present invention.

[0023] Lastly, FIG. 5 is a plan view of a plate formed for a ridge gantry with a walkway of FIG. 4 according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0024] FIGS. 1 and 2 show a grain cart comprised by a hopper 11 intended to contain grain with side walls 12 extending longitudinally between end walls 13. Those side walls 12 are inclined inward and downward converging towards a bottom 14 with an angle normally determined by the natural slope of the grain. Although the hopper 11 is represented mounted on two axles with wheels 16, the present invention is equally applicable to grain carts with a single axle, with a multi-axle system with tandem axles or tracks according to the terrain for which the grain cart is to be used.

[0025] On the outer side of one of the end walls 13, corresponding to the front end, there is a gearbox 17 with a splined shaft 18 for coupling to a tractor PTO to drive a grain auger or vertical auger 19 made up of two segments 19A and 19B hinged with respect to each other, the lower segment 19A coupled to the gearbox 17 by bevel gears while the upper segment 19B ends in a discharge spout.

[0026] FIG. 2 shows the inside of the hopper 11. Above the bottom there extends a longitudinal auger 21 which is driven—together with the vertical auger 19—from the gearbox 17 to sweep the grain at the bottom of the hopper towards the vertical auger 19 which raises and unloads the grain in a means of transport or storage such as those mentioned. Above the sweep auger 21 there is an inverted V-shaped cover 22 that acts as a fastening structure for a variable pitch flow gate device, comprised of two blades 23 slidable on inclined planes of the cover 22, functioning as gates to regulate the flow of the granular material contained in the grain cart towards the auger 21 at the bottom of the hopper 11.

[0027] The blades 23 are mounted on the inclined walls of the cover 22, bolted to a cam system that enables the longitudinal movement of an actuator to be transformed into a transverse movement on the inclined planes on each side of the cover 22 for opening and closing the blades 23. This cover 22 is bolted to the inclined side walls 12 of the hopper by means of support strips that replicate the internal shape of the cover 22 and end perpendicular to the surface of the side faces 12 of the hopper to be able to be fastened to them by means of bolts for easy removal thereof.

[0028] FIGS. 2 and 3A show the grain cart with an inverted V-shaped ridge 24, according to the present invention. The ridge 24 is arranged longitudinally and suspended over the flow gate system 23, leaving two open spaces 26 on the flanks of 12 cm between the sides 12 of the hopper and the bottom of the ridge 24 in such a way so as not to negatively affect the flow of the grain material during unloading. The cover, which was already calculated to withstand the weight of the grain material that it usually contains above, supports the weight of the ridge 24. In this preferred embodiment, the ridge 24 is formed of reinforcing ribs and holds a series of identical plates 27 arranged on edge and spaced 400 mm from each other, by way of gantries, and joined together by 100×31.7 mm (4″×¼″) strips as shown more clearly in FIGS. 3B and 4.

[0029] The outlines of the plates 27 are laser cut from sheets of SAE 1010/20 material with a thickness of 4.8 mm ( 3/16″) to shape them, as also shown in FIG. 5, with a horizontal web 28 having flat upper edges 29 with serrations to provide the walkway with non-slip properties and a pair of side wings 31 projected outwards and downwards, that is, in an inverted “V” towards the side walls of the hopper in a transverse direction, to fully rest on the inclined planes of the cover 22. In the embodiment represented, the upper web 28 measures 200 mm long and 32 mm high at the edge where a platform 32 is welded by way of a gateway for an operator to carry out maintenance tasks on the blades 23 and on the sweep auger (horizontal) 21. The cut of each plate 27 includes a notch 35 in the middle of the web 28 to facilitate the fitting and welding of the platform 32. Alternatively, the plates 27 can be located closer to each other such that their same serrated horizontal upper edges 29 constitute a latticed surface for a walkway with non-slip properties.

[0030] In the embodiment represented by way of example, part of the non-slip latticed surface of the walkway is formed by the horizontal upper edges 29 of the plates 27 and the rest by crossbeams 33 of the platform 32, with a distance of 133 mm between each other, leaving openings 34 so that there are no accumulated grains on the walkway once the hopper has been emptied. The platform 32 comprises two side beams 36 between which multiple crossbeams 33 are staggered that complete the walkway in the spaces between successive plates 27 such that the walkway is defined by the webs 28 of the plates 27 and the crossbeams 33 of the platform 32. The platform 32 is supported by the plates 27 of the ridge 24 that act as gantries resting on the inclined planes of the cover 22, directly or by means of spacers 37 to give more height to the ridge-walkway assembly.

[0031] The addition of the ridge 24 above the flow gate system 23 allows the weight of the grain material to be supported by the ridge and not by the blades, solving the problem of the weight of the grains that increased the normal force of the blades 23 against the cover 22 (it pressed on them), which increased the friction force, making it difficult to open and close, increasing the force made by the actuator cylinder and overloading the cams that convert the longitudinal movement of the actuator into a transversal movement for both blades 23, to the point of being able to tear the lugs of the cams.

[0032] A preferred embodiment for putting into practice the present invention has been described above notwithstanding the fact that various changes may be envisaged without departing from the teachings of the present invention. For example, it has been chosen to secure the walkway to the ridge 24, taking advantage of its robustness, instead of directly to the hopper such as by means of support feet against the side walls 12 of the hopper. Likewise, the walkway can be continuous or segmented into sections.