CS201275B1 - Structure of the supporting frame of the tractor vehicles with the support of the working facility - Google Patents

Description

(54, Construction of the supporting frame of tractor vehicles with load-carrier equipment)

The invention aa relates to a rigid construction of a tractor frame and a work equipment carrier and solves the reduction of the weight of the carrier frame while simplifying and making its production more famous.

Loaders are known with a support frame consisting of a rigid thatched sheet of one piece of steel sheet which is bent at opposite ends so as to form a channel channel, possibly with flanges, over the entire length of the loader. The front end of the support frame is closed by a separate piece fixed to the bottom the frame and its side walls. Columns attached to the rear of the loader carrier frame are mounted to said flanges, supporting the boom arms of the working equipment, which are tilting in planes parallel to the longitudinal axis of the vehicle and perpendicular to the plane passing the axles of the wheels.

In some loaders, the workpiece is pivotally mounted on the rear elevated portion of the support frame, formed by a fuel reservoir on one side and an oil reservoir on the other. It is also known to provide a pair of parallel flaps attached to the vehicle support frame on each side thereof and not having a rotatable fixed dust extractor at the apex, wherein in the inner space between the yard post, hydraulic fluid reservoirs are formed to control all hydraulic loader devices. Both reservoirs are connected in the upper part by a hollow cross member, which creates one preator for the hydraulic fluid. Other loaders have a rear inner part of the support frame

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201 27S reinforced by a U-shaped member that is connected to the adnoa as well as to the side walls to form a fuel tank *

The engine compartment is always in the rear of the loader, while the operator's cab is in its front. The drive, driven by an internal combustion engine via a hydrostatic power transmission unit, is formed by independent double wheels of the wheels on the right and left sides of the loader. The wheels are mounted on the output shaft of the transmission, located along the side walls of the support frame and form an integral part thereof. Seam plates are attached to the reinforcement of the frame structure at various points, in particular between the strip and the side walls of the support frame.

In particular, the support frames mentioned are considerable complex, articulated and heavy, as well as production-intensive. Since the support frame, which has a trough-like shape along its length, must be made of one piece of thick-walled sheet, special heavy bending machines are required for this purpose. Precise machining of the large piece forming the support frame for travel is required, as the gear boxes are formed as an integral part of the side walls of the support frame. As a result, if the traction gear fails, the loader must be transported to a workshop for repair. The fuel tank, formed by the U-shaped piece to the bottom and the side walls of the trough support frame, is exposed to high stresses on the frame and, with a lesser weld, there is a risk of damage and leakage. If it is necessary to replace the reservoir for damage to this reservoir as well as other right and left-side reservoirs to form part of the working structure of the work equipment, it will sometimes be necessary to replace the vehicle's rigid support frame, one of the most expensive and expensive parts.

It is known that traction vehicle support frames, formed by yard sidewalls with no elevated part for pivotally attaching the working device, are connected to each other along the bottom or the front with upward shaping and, moreover, to no crossbeams serving at the same time as a hydraulic reservoir. In order to make the structure of such supporting frames strong enough, the side walls in the central zone are high and connected upwardly to each other by a support plate which is at the same time the carrier of the seat and the front plate. The solid bottom prevents access from below to the drive gearboxes screwed to the inner wall laterally when the vehicle is lifted * As a result of the failure of the drive gearboxes, the supporting frame part formed by the above-mentioned plates on which the machine unit is mounted between the sidewalls and the bottom. This closed support frame construction prevents access to the machine aggregates from above, which significantly hinders repair. The output shafts of the trolley to which the trolleys are mounted pass through the opening in the middle of the side, making it difficult to remove the trolley.

These disadvantages are overcome by the solutions according to the invention. Its essence is that the sidewalls formed as punched elements are interconnected from the rear part of the bottom by leaning into the middle zone, bent at the front and rear by the amar mount, the transmission gearboxes being located in a space open downward bounded by the bottom edge and front a rigid crosspiece in the form of a cover overlapping at least partially One horse and two 275 gearboxes, the other of which is at least partially covered by a cover fixed to the bottom and the inner walls of the sidewalls.

In this way, according to the invention, the problem of easy and quick access to all loader machinery and easy removal of the gearboxes is primarily solved. Furthermore, by reducing the size of the mustards and shortening the bottom, the lightweight structure of the vehicle frame is simplified, as well as its simplified manufacture. In the front part, the sidewalls according to the invention only slightly overlap by the height of the travel gearbox. Each sidewall with its no raised portion forming the carrier for the rotatable attachment of the work equipment may be straight and made as one piece of the piece, requiring less machining, such as e.g. said trough structure of the supporting frames, forming at the same time one wall of the gearboxes of the drive gearboxes. Since the sidewalls are connected to each other in the rear bottom only by a shorter bottom, closing the entire bottom of the support frame and a single rigid no crossbeam in the rear and front rigid crossbeams at the front, the compact structure of the support frame complies with maximum stress and maximum load requirements. reduce weight.

An advantage of this solution according to the invention is that the gearboxes are located in a space open downwardly defined by the inner edge of the bottom in the central zone of the support frame and the front rigid cross-sectional beam shaped as a cover over at least partially one end of the gearbox. the solution is at least partially covered with a cover fixed to the bottom and the inner walls of the support frame. This solution provides convenient access to the gearbox housings which can be easily removed and removed after lifting the vehicle. When repairing travel gearboxes, the loader may not be moved from the factory, but it is sufficient to carry the defective travel gearbox for repair to the mill.

It is a further object of the invention that the output shafts of the gearbox housings extend through open cut-outs on the lower edge of the opposite sidewalls. This facilitates the removal of the gearbox housing.

According to the invention, the straight-arm hydraulic motors for tilting the boom arms with the work tool are rotatably mounted on both sides of the loader. On the one hand, on the rear elevated part of the rigid support frame structure, on the other hand on brackets attached to its height support. This not only achieves significant additional weight savings but also simplifies production.

Since the fuel tanks or hydraulic fluid as part of the vehicle support frame have been removed by the invention, their failure due to the forces transmitted by the support frame is ruled out. In addition, because of its simplicity of shape, the loader or other tractor vehicle manufactured using the invention also has aesthetic requirements placed on industrial products.

On the front rigid crossbeam It is possible to attach the front part of the cab, also various other elements securing e.g. guiding or securing work equipment. A rear part of the cab may be attached to the rear elevated portion of the fixed frame structure.

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Fuel or hydraulic reservoir It is possible to place on the sides at the rear bottom of the rigid support frame structure near the sides, attaching to the side bottom and the cover of the respective side.

An example of an embodiment of the invention is shown in the drawings, in which FIG. 1 shows an axonometric view of the load-bearing frame of a wheeled loader; FIG. 2 is a longitudinal section through the center of the trellis frame; and FIG. 3 is a vertical section through the trellum indicated in FIG. 2 as section A-A.

1 shows a rigid structure of the support frame formed by a pair of sidewalls 1, which is raised at the rear. The side panels 1 are connected to each other by a front rigid crossbeam 2 in the form of a cover folded inwardly at the top. At the rear, the sidewalls 1 connected at their bottom by bottom 2 extend into the central zone of the support frame, folded on the opposite ends upwardly, the engine compartment being formed. In addition, the side walls 1 on the raised parts are connected by no rigid beam 4. On the inside, the bottom 2 has two lateral recesses for the housing of the travel gearboxes 2 with the output shafts of the 6 travel wheels. The gearbox housing 2 has screws 2 detachably attached to the inner wall of the support frame. One end of the gearbox housing 2 is covered by a front rigid cross-member 2, shaped as a cover. The other end of the gearbox housing 2 is covered by a cover 8 fixed to the bottom 2 of the support frame and its inner side walls. The rear elevated portions of the side 1 are height-reinforced by a U-shaped brace 2 welded from their point of connection to any rigid crossbeam 4 downwards to the lower edge of the sidewalls 1. On the top of any rigid crossbeam 4 In these openings 11 and in the openings 12 of no raised portions of the sidewalls 1, the pivotally attached, not shown boom arms are rotatable.

Brackets 13 with apertures 14 attached to the two stiffeners 2 are mounted in the apertures 14 of the brackets 13 and in the apertures 15 of the rear elevated portion of the side 1. On the lower edge of the side walls 1, there are cutouts for the output shafts 16 of the gearbox housing 2.

Fig. 2 shows a support side 1 with a welded-on height reinforcement 2 with a bracket 13 with an opening 14 attached thereto. To the reinforcement 2 a rear rigid crossbeam 4 is provided, provided with a bracket 10 with an opening 11. A bottom is attached to the rear bottom. 2 »which is rearward at the front and upward. A cover 8 connected to the bottom 2 and sidewalls 1 covers the right side of the gearbox housing 2. A transverse stiff beam 2, shaped as a cover, folded inwards at the top and opened from below, covers the left side of the gearbox 2. 2 pojazdu. The gearboxes 2 of the trolley 2 are disposed by a cover 8 and a front rigid cross-member 2 shaped as a cover, that is to say in a space open downwards. This allows easy removal of the gearbox housing 5,

FIG. 3 is a fork carrier frame construct the solid formed bočnioami the support 1, a bottom 2 connected to each other »and umlestnenle cabinets gear unit 2 taken along the travel of lateral" NiO 1. The base 2, the ^m ajúoe stranáoh adjacent to the side of the recess 1 umlestnenle cabinets traction gear 2 , it is folded upwards in both its front and rear.

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The gearboxes 2 of the traveling gear 2 are partly covered by a cover 8, which is open downwards, from above and laterally. On the rear elevated portion of the sidewalls 1 there is a brace 9 provided with a bracket 13. On the rear transverse rigid beam 4 connecting the two sidewalls 1, brackets 10 are fastened, e.g. L-shaped

The invention is applicable to the production of lightweight, expediently arranged compact frame structures for tractor vehicles for a variety of purposes, operating reliably in difficult conditions. It is suitable, in particular, for wheeled loaders but also for other types of tractor vehicles, for example, as a front part of a split support frame of a loader.

Claims (2)

OBJECT OF THE INVENTION 1, Supporting frame structures of tractor vehicles with a work equipment carrier, consisting of two sidewalls, reinforced by height and longitudinally removably mounted gearboxes, interconnected by a bottom, a front rigid cross-member and a rear elevated section by no rigid cross-member carrying The boom arms are tiltable by stroke linear hydraulic motors, characterized in that the sidewalls (1) formed as supporting elements are interconnected from the rear (3) by a bottom extending into their central zone, bent front and rear upwards, with the gearboxes / 5) of the carriage are located in a downwardly open store defined by the inner edge of the base (3) and a front rigid transverse beam fel in the form of a cover covering at least one end of the carriage housing (5). a cover overlapped / 8 /, fixed to the base / 3 / and the inner walls of the sidewall and /. Support frame structure according to claim 1, characterized in that the side walls A / are provided on the lower edge with open cutouts A6 / for the output shafts / 6 / of the gearbox housings / 5 /. Supporting frame structure according to Claims 1 and 2, characterized in that the side walls (A) are reinforced in their rear elevated part by a U-shaped space reinforcement (9) from the point of interconnection with any rigid cross-member (4) to their lower edges. wherein the stroke linear motors are rotatably mounted in the holes (14) of the brackets A3, mounted on the stiffeners (9) of any raised portions of the sides A and in the coaxial holes (15) of no raised portions of the sides (1).