DE2324690A1 - RODS FOR BUCKETS UNLOADED AT HEIGHT - Google Patents

Description

Linkage for buckets unloading at height.

The invention relates to the type of front loader or tractor bucket which have lifting arms for operating a bucket for handling material.

Often times the load to be unloaded has to be over the side of a wagon, over a wall or other high objects are lifted. The reach of the loader's lifting arms is based on the The distance that the cutting edge of the bucket must sink when the load is emptied is not large enough. In in such cases there is a critical factor in the lowering characteristics of the linkage the ability to achieve the required elevation and reach. An example of an Etmer pole that deals with this problem is disclosed in U.S. Patent 3 Io4 771.

In the linkage arrangement disclosed in the aforementioned patent, the bucket is on a Pair of short, lower links next to the floor and a pair of longer, upper links next to the Head carried. An actuating cylinder is pivotally mounted to engage the lower ends of the longer link

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couple to pivot outwards, while the shorter links pivot upwards for a combined pivoting movement swivel, which results from the bucket when it is lifted and moved forwards or outwards, while dumping down. The tilting down or the partial turning movement on the cutting edge is slightly offset by the upward movement with the result that the amount of lowering the bucket is decreased.

The invention creates a bucket rod which has improved lifting and reach with a minimum of dips.

According to the invention is a bucket attachment rod provided, which is a lower, pivotable link attached to the bucket next to the cutting edge, a pair of upper links, one with the other link and the latter with the bucket near the upper edge is connected, which are actuated by a cylinder which is between the upper links is attached to form a triangle, two sides of which are through the upper limb and the cylinder and the third side of which is formed by a short part of the other upper link so that the upper Pair of links entirely from a folded, folded sheet with the greatest effect in one The path of the bucket is stretched forwards or outwards with a minimum of cylinder displacement will.

For special loading applications where the lifting arms are attached to upright supports at the rear of the machine are and along the driver's cab to the front and then down close to the front Unloading the machine with the arms lowered is the greatest reach or movement to the outside of the bucket in the raised position - the lifting arms still close to the front of the machine.

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In such cases, the invention is particularly advantageous in that it is provided that the discharge * movement is made on the outermost part of the linkage.

It is most preferred that the links of the upper pair are substantially the same length have, so that in the folded position the links are folded together or partially overlap and protrude up and down when the bucket is tipped into the rear or return position. When protruding furthest forward, the limbs are in a substantially horizontal or horizontal direction from one another spread in a flat bottom that extends forward over the head of the bucket.

In most applications it is advantageous to have channels or recesses in the rear wall and base wall of the bucket to accommodate the lower links. The articulation links are generally L-shaped which, with the long bar part to the front,

Put the I-below the bucket and with the short / parts on top behind the one protrudes. Each leg is at least partially received by a recess, when the bucket is in the retrieval position.

The drawing illustrates an exemplary embodiment of the invention.

Fig. 1 is a longitudinal view and in elevation of a front loader pivotable on upright supports at the rear attached arms again, which unload along the side of the driver's cab and on which the front a material handling bucket is located, with the anne in a lowered position, a center position and a fully raised position with the bucket in a digging position, in an intermediate unloading or unloading position and in a complete unloading position is reproduced.

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Pig. Fig. 2 shows a side view of the bucket's attachment rod with solid lines in Fig. 2 Loading or digging position and in the unloading position with dash-dotted lines corresponding to the lowered position or elevated position of the lifting arms in Pig. I.

Pig. J> is one half of a rear view of the bucket and linkage symmetrical about the centerline of the bucket.

In Pig. 1 is a front loading vehicle with Io a pair of lifting arms 12, which at the rear end on upright supports 14 of the vehicle are pivotally mounted and unload to the front along the side of the driver's cab 15 and at the front a material handling bucket is attached. A pair of lifting cylinders 18, one of which one on each side of the loader Io is operated to raise and lower the lifting arms, which ' the latter are shown in the lowered, in the middle and in the fully raised position, as in FIG. 1 is shown with dashed lines.

A bucket attachment linkage 20 holds the bucket 16 to the hoist 12. The bucket attachment is actuated by the lifting arms 12 via the pivot axis 22 with the aid of a tilt and return cylinder 23, which is connected to the hydraulic system of the loader Io and controlled by the driver's cab 15 will. When the cylinder 2J is extended, the pail rod is part of the rod 21 of the attachment connection 2o pivoted outwards, as shown in Pig. 1 with solid lines is reproduced and is the cutting edge

24 of the bucket in attack on the ground. When the cylinder

25 is withdrawn, the rod part 21 is around the pin 22 tilted backwards and the bucket with the cutting edge 24 and the rod part 21 of the attachment

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Connection 2o brought back into the position shown with dashed lines.

The attachment device 2o shown in FIG. 2 has a lower main pair of joint members 25 of im generally L-shaped with a long forwardly projecting leg portion 26, which at 27 next to the Cutting edge 24 of the bucket is attached, and a shorter, upwardly directed leg 28, the extends behind the bucket. The leg parts 26, 28 are in channels or recesses 29, j5o im The bottom and back of the bucket are recessed and form a rigid support for a bucket. An attachment frame 31 has upper and lower cross members 32, which the lower rod members 25 on the front bridge (Fig. 3) · A strong rib 23 on the cross members adjacent to each side of the mounting frame 31 is provided with an eye 34 at the lower end, to form a pivotable connection at 22 for lift arms 12 on opposite sides of the loader. A central rib 35 forms a pivot mount in the center line of the bucket for the lower end of the tilt and return cylinder 23.

The bucket attachment 2o comprises an upper rod portion 21 with a pair of links 37,42 on each side of the bucket, which pivot at 3o are attached to a support 39 carried by the upper frame cross-piece 32 and at 43 to a Support 44 is attached to the back of the bucket. Referring to Fig. 3 which is a half rear view of the bucket and the fastening arrangement symmetrically to the center line, it should be noted that that the links 37 * 42 are the manufacture of parallel rare pieces 37a, 42a, which at each end

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are connected to one another by bushings, such as 38a, and between the ends are spread by cross pieces 59a, 4oa, and that the link 42 is formed in the same way. In each pair of links yj , 42, an actuating cylinder 45 is pivotally mounted with its lower end on the sleeve 38a and with the rod end 48 at 49 on a slide bearing near the upper end of the link 42. In this way, the members essentially receive at least two sides of the cylinder 45 or enclose three sides of the cylinder 45 and tend to protect the cylinders from harmful impacts.

Therefore, according to the present invention, the bucket attachment linkage 2o has a lower pair of links pivotally attached to the bucket near the cutting edge and a pair of upper links each attached to the lower links and the bucket near its lower edge. Each of the links of the upper pair is actuated by a cylinder, the lower end of which is pivotally connected to a first transverse axis at 38. The rod end of the cylinder is pivotably attached to a second transverse axis at 49, which forms a triangle with a third pivot axis at 4o on the upper pivot connection between the links 27 * 42. two sides, which are substantially longer than the third side, so that the linkage can be fully extended from a collapsed or folded position (solid lines in Fig. 2) to the greatest possible protruding or outer position, with the result that the lower Ends of the links 42 have a much larger horizontal than vertical moving part, which gives a high ratio of the bucket work to the cylinder displacement.

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It is clear that various changes in shape, detail, arrangement and can be made in the proportions of the parts without departing from the inventive concept.

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Claims (1)

Claims. ■ 1, / front loader consisting of a fuselage this pivotable lifting arm and a material handling bucket attached to the latter, characterized in that the attachment for the bucket on or near its cutting edge Middle and upper articulation links with a first link and a second, with one end at the first link and with the other end on the bucket., pivotally attached second link and an actuating cylinder mounted between the hinge members and having a triangle two sides, formed by the first member and the cylinder, and one drjfcten, by part of the second Form link formed side, which 'the latter is not greater than half its length. 2. Front loader according to claim 1, characterized in that a pair of links are used as lower means is provided with leg parts which extend under the bucket and at their outer ends to the Cutting edge and with their rear Endei are hinged to the lifting arms and that a cylinder between the lifting arms and the pair of links is attached, the pair of links allowing the bucket to tilt and return about the rear ends of the pair of links. 5- front loader according to claim 2, characterized in that that the upper links comprise a pair of first and second links on each side of the bucket, of which the first at their upper ends with the 309885/0394 second are connected and are substantially the same length as the second, the cylinder is pivotally mounted on the second link close to the first. 4. Front loader according to claim 3 * characterized gekennzelehnet that the lower pair of members, each of which has a leg extending upwards and behind the bucket, and the first of each pair of upper members pivotally mounted at its lower end next to the leg part is. 5. Front loader according to one of claims 1 to 4, characterized by a pair of lifting arms which are pivotally mounted on upright supports at the rear end of the fuselage and forward along the side of the driver's cab and unload down at the front of the loader in the lowered position of the arms; an articulated linkage for attaching a bucket; one attached to the ends of the lift arms and one to the linkage attached operated bucket, the linkage having a lower link with a long, after front protruding leg portion which extends under the bucket and adjacent to the cutting edge of the bucket hingedly attached to the outer end, and with a shorter one pointing upwards, with the long one Having leg part connected or adjoining this leg part; Channels or recesses are provided in the bottom wall and the rear wall of the bucket for receiving the legs; a first upper one Link, a second top link pivotable at the top of the first top link and the top edge of the Bucket is provided adjacent the lower end of the first upper link and a cylinder is provided which extends between the first and second upper members to form a triangle with two through the first upper link and the cylinder formed sides and with a third side which is a short part 309885/0394 - Io - of the second upper link, the lifting arms effectively reaching towards the end of the longitudinally forwardly extending leg portion of the lower limb, 309885/0394 Blank page