FI128662B - Suspension arrangement for an underbody grader to be used in a vehicle, a working machine or equivalent, and vehicle, working machine or equivalent - Google Patents

Abstract

The suspension arrangement for planer blades (21) to be used in a vehicle, a work machine or the like to improve the inclination property of the planer blade slide blades comprises: - a suspension frame (1A) on the right side and one from this separate suspension frame (1B) on the left side, each of which is arranged separately from each other and attached or attachable to the frame (60) of the vehicle, work machine or equivalent by means of a hinge joint (64, 65), preferably through an auxiliary body (2); and - an adjusting foot (3A) which affects the suspension frame (1A) on the right side and an adjusting foot (3B) which affects the suspension frame (1B) on the left side, which length of the adjusting feet (3A, 3B) can be adjusted separately, and which are arranged so that the sliding blade (4) in working position can be inclined towards the frame (60), so that the angle of the lower edge of the sliding blade (4) relative to the horizontal is changed by adjusting the mutual height of the adjusting feet (3A, 3B). The sliding blade (4) is fixed separately both in the suspension frame (1A) on the right-hand side and in the suspension frame (1B) on the left-hand side by means of a hinge construction which allows rotation, in particular an ox eye (9).

Description

FIELD OF THE INVENTION The invention relates to the suspension of underbody graders or underbody scraper for use in vehicles, work machines and the like. Technical background Aluster blades are used, for example, to level dirt roads and, in winter, to remove polant from the road surface. Vuomet Oy's Finnish patent 126587 discloses a suspension arrangement for a base blade used in a tractor. In the patent, the base steel is called the base plow. Since plow means an agricultural tool used for plowing in addition to a snow plow, the blade must be regarded as a more descriptive name because of the intended use of the implement. The base blade is then an actual assembly of equipment to be connected to a vehicle, work machine or the like, which also comprises a dozer blade under the vehicle, machine or the like, which means the part of the base blade that is in contact with the road surface and pushes the material to be moved. In the above-mentioned Vuomet Oy patent, the dozer blade is attached to the tractor by means of a frame plate. The frame plate is suspended from the front of the tractor by means of a hydraulic cylinder at the front and two attachment points (Q) not specified at the rear.

N <Pajakulma Oy's Finnish patent application 20155861 <@ discloses the suspension frame of a dozer blade. The ladder-like suspension frame N consists of longitudinal E 30 beams attached to each other and transverse beams welded to them. The suspension frame is height-adjustable at the front & by means of 2 hydraulic cylinders attached to the left beam and the right beam by means of a length-adjustable mounting post N. The suspension frame is articulated between the tractor frame and the suspension frame by means of a ball mounting ball for the mounting posts and by a ball mounting ball between the frame and the frame extension.

On the longitudinal beams of the suspension frame there are plate-like sliding elements mounted on the beams.

The applicant's Finnish patent 128021 discloses a suspension arrangement for a base blade used in a vehicle, work machine or the like.

The suspension plate used to suspend the dozer blade is suspended from the tractor frame by attaching the frame plate at its front end to separately mounted hydraulically height-adjustable posts and at its rear end to the subframe fixed to the tractor frame by means of a bull's eye joint.

OBJECT OF THE INVENTION The object of the invention is to improve the tilting property of the dozer blade of the base blade suspension arrangement.

This object can be solved by means of a suspension blade suspension arrangement according to the independent claim and by means of a parallel vehicle, working machine or the like according to independent claim 13.

The dependent claims describe technically advantageous aspects of the base blade suspension arrangement.

Advantages of the invention The suspension blade suspension arrangement for use in a vehicle, machine or the like comprises a right-hand suspension body and a separate left-hand suspension body, each of which is arranged separately and fastened or N can be fastened to the body, machine or similar frame by means of a hinge.

In addition, the suspension arrangement Q Q comprises an adjusting foot acting on the right suspension frame N and an adjusting foot acting on the left suspension frame E 30, the length of the adjustable legs being individually adjustable and arranged so that the dozer blade in the working position & can be tilted to the frame so that N by adjusting the mutual height of the adjusting feet.

The dozer blade is attached separately to both the right-hand suspension frame and the left-hand suspension frame by means of a pivoting articulation structure, in particular a bull's eye.

Compared to the solutions described in the applicant's above-mentioned patent and Pajakulma Oy's previously mentioned patent application, the tilting property of the dozer blade suspension arrangement can be realized superiorly from a mechanical point of view, as it can substantially avoid or at least significantly reduce strapping and attachment to the frame. patent and using the solutions described in Pajakulma Oy's patent application, compulsion arises when the height of only one adjusting leg is changed.

Torsion causes lateral loading of the adjusting foot in both three-joint suspension solutions.

Especially when telescopic adjusting feet are used as adjusting feet in practice, lateral loading easily causes the adjusting foot to jam.

The suspension arrangement now presented reduces the lateral load on the adjusting legs and, in particular when using telescopic adjusting legs, practically eliminates the jamming of the adjusting leg.

Since it is a base blade, the dozer blade according to the invention is practically necessarily below the vehicle, the working machine or a similar frame and can be pivoted between the working position and the transport position by means of a number of hydraulic cylinders. o Swivel to transport position.

The transport position means N positions of the dozer blade, in which the dozer blade is rotated to the upper position 5 to increase the ground clearance, and the working position means? the position of the dozer blade required to remove the N 30.

These dozer blade positions are described in more detail in Applicant E's aforementioned prior patent. o In this case in particular, one of the hydraulic cylinders is preferably a S-turn cylinder, which is arranged to turn the dozer blade between the> working position and the transport position.

Likewise, there is preferably one of the hydraulic cylinders, a transfer cylinder, which is arranged to move one articulation point of the dozer blade.

Preferably, of the articulation structures allowing the dozer plate suspension to rotate, the first is a fixedly mounted articulated structure and the second is movably mounted on a shaped member, and wherein a hydraulic cylinder is arranged to move the articulated member in the shaped member.

Such a solution is described in the applicant's earlier patent mentioned above.

The rotation-allowing articulation structures used to attach the dozer blade are or comprise bull's eyes.

According to a preferred aspect, the movement in the direction opposite to the working direction of the swivel cylinder dozer blade is limited by means of a pressure relief valve.

This makes it easier to avoid damaging the frame plate, the dozer blade or the fastening structures between the vehicle, the implement or a similar frame or suspension arrangement when the tilted dozer blade is turned from the working position to the transport position.

In this case, due to the amount of inclination, it may no longer be possible to turn to the transport position.

By means of a pressure relief valve arranged in this way, it is also possible to prevent the dozer blade from occasionally catching on the road surface when reversing a vehicle, work machine or the like, which can cause a dangerous situation.

This may be the case, in particular, when the road S is uneven, at the edge of the pavement, or especially in the case of traffic dividers and platforms used in the built environment in urban and agglomeration areas, when N is reversed.

By means of the pressure relief valve, part of the impact energy T 30 can be absorbed into the hydraulic circuit, whereby a metal E against metal collision can either be avoided completely or at least the kinetic energy can be reduced somewhat before the S collision.

N Most preferably, the pressure relief valve is a double pressure relief valve arranged to limit the force applied to the pivot cylinder in the working direction of the dozer blade and also to the force applied to the pivot cylinder in the opposite direction to the working direction of the dozer blade.

Such a hydraulic circuit provides a cost-effective yet effective way to prevent damage to the base blade as well as to a vehicle, machine, or the like.

A vehicle, work machine or the like according to the invention comprises a base blade suspension arrangement according to a first aspect of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of the base blade suspension arrangement will now be described by way of example with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a tractor in which a dozer blade plate is suspended using a suspension arrangement; FIG. 2 is a perspective view of the base steel detached from the tractor; FIG. 3 is a base blade from below the tractor body, seen directly from above; FIG. 4 is a front view of the base blade when the dozer blade is not tilted; FIG. 5 FIG. 4 base blade when the dozer blade is tilted lower, for example the left edge (the tilt can also be in the other direction); S FIG. 6 tilted dozer blade inverted to transport position; N 25 and

S K FIG. 7 hydraulic diagram.

N I The same reference numerals refer to the same technical parts in all a FIG. & Detailed explanation

FIG. 1 shows an illustrative view of a tractor 20 in which the dozer blade plate 4 of the base blade 21 is suspended using a suspension arrangement.

Instead of a tractor, the dozer blade plate 4 of the base blade 21 can be hung more generally on a vehicle, work machine or the like. In the following application examples, the tractor is used as an exemplary vehicle or implement for clarity. The dozer blade 4 is turned from the working position to the transport position by means of a hydraulic cylinder 5. FIG. 1 shows the dozer blade 4 in the transport position. In the working position, the dozer blade 4 is rotated to the lower position so that the lower edge of the dozer blade 4 comes into contact with the road surface. The preferred pivoting mechanism and pivoting to the transport position / working position is described in more detail in the applicant's previous patent. For the present invention, a similar articulation and pivoting mechanism can be used as described in the applicant's previous patent. The height adjustment and tilting of the lower edge of the dozer blade 4 (i.e. the blade / wear plate / pin blade, etc.) is most preferably performed by means of separately adjustable adjusting feet 3 (right adjusting foot 3A, left adjusting foot 3B). FIG. 4 shows the base blade 21 seen directly from the front when the dozer blade 4 is not tilted, and FIG. 5 shows the base blade 21 when the dozer blade 4 is turned lower edge. Tilting can also be implemented in the other direction, i.e. the right edge lower. FIG. 7 shows a possible hydraulic diagram for tilt adjustment: the valves / control blocks 73, 75 used in the length adjustment of the hydraulic cylinders of the adjusting feet 3A, 3B, which thus adjust the height of the adjusting feet, are connected to one pressure line P1 taken from the vehicle / implement / hydraulic block The valves / control blocks 73, 75a can advantageously be connected to the same pressure line in parallel. x In this case, the control block / valve 75, 73 is most preferably N controllable via the selector 74. This makes it easier for the user of the base blade 21 T 30 to work when the tilt adjustment becomes E almost intuitive. & the shocks to the adjusting feet 3A, 3B can be reduced by the pressure accumulator PA in the pressure line P1, P2 of the adjusting feet.

FIG. 2 shows a suspension body 21 of a base blade 21, preferably comprising a right-hand suspension body 1A, a left-hand suspension body 1B, both connected at one end to the mounting leg 63 of the adjusting foot 3. Each adjusting foot 3 is a telescopic foot (sometimes or by pulling the extension outwards, e.g. a pipe / cylinder combination. The upper mounting lugs of the adjusting legs 3 are attached to the body 60 of the tractor 20 in a rotational manner and the flange-shaped mounting plates 61 are bolted from the holes 62 to the body 60 of the tractor 20. At each end, each suspension frame 1A, 1B is most preferably attached to or a hardened sleeve, or a plain bearing) to the subframe 2 (which is attached to the frame 60 of the tractor 20, in practice most preferably to the rear axle housing). The mounting lug 64 and the fitting 65 form a hinge joint by means of which both the right-hand suspension body 1A and the left-hand suspension body 1B are separately articulated relative to the subframe 2. Instead of a hinge joint, another mechanical structure can be used, as long as the structure allows rotation about the pivot axis and is rigid laterally, to prevent rotation of the suspension frames 1A, 1B by using the hinge joint to get rid of Pajakulma Oy's patent application.

O N In addition, with respect to the solution 5 described in the applicant's previous patent, it is now possible to prevent the occasional situation that when the <Q dozer plate 4 is in its upper position, when tilted N, the frame plate could catch on the frame of the tractor 20. This makes the E 30 especially useful when you want the best possible ground clearance for your vehicle, implement or similar. In this case, the suspension frame 1A, 1B can in principle be placed> in contact with the frame S of the vehicle, working machine or the like substantially along its entire distance. The base blade 21 shown in FIG. 2 is much more robust than the solution according to the applicant's previous patent: the jamming of the adjusting feet due to the different height position of the adjusting legs 3 can be prevented or significantly reduced. Similarly, the articulation shown can effectively prevent lateral forces from entering the suspension frame from turning the dozer blade 4, which could jam the adjusting legs.

3. The hydraulic cylinder 5 pivots the dozer blade between the working position and the transport position. The hydraulic cylinder 5 also provides a sufficient contact pressure on the dozer blade 4 to the road to enable efficient removal of the polant. The hydraulic cylinder 6 moves the articulation point of the dozer blade. In this regard, we refer to the applicant's earlier patent for advantageous details of the more detailed structure of the suspension structure.

FIG. 7 shows a hydraulic diagram of the hydraulic line used to turn the dozer blade 4. Both the pivot cylinder 5 and the articulation point transfer cylinder 6 are connected to one pressure line P1, P2 (which is most preferably a different pressure line than the tilt adjustment) taken from the hydraulic block of the vehicle / implement / the like via a double pressure limiter 71. The pivoting cylinders 5 and the articulation point transfer cylinder 6 can advantageously be connected to the same pressure line in parallel. The pressure line PA is most preferably used in the pressure line.

FIG. 3 shows the displacement of the joint point of the dozer plate 4. The dozer plate 4 is suspended from a rotating hinge structure, most preferably S by means of a bull's eye 9, and most preferably from both body plates a 1A, 1B. The second body plate, most preferably the right x body plate 1A (of course there may be N in the left body plate 1B instead), has a shape-limiting member T30 such as FIG. 3 and the slot 7, E disclosed in the applicant's earlier patent where the dozer plate suspension joint is moved by a hydraulic cylinder 6O.

FIG. 6 shows the tilted dozer blade 4 turned to the transport position N. The tilted dozer blade 4 causes torque on the frame plates 1A, 1B in the transport position. However, the lateral torque is not as bad as in the “three-roof joint arrangement”

nor described in applicant's earlier patent kolminivelisessä structure as the suspension frames 1A, 1B and the sub-frame 2 of the hinge joint between transfer the load of the subframe 2 by the tractor 20 to the frame 60. Kolminivelisessä pattern adjustment feet 3A or 3B, the extension or shortening the frame plate vääntäisi control feet of the opposite side and may result in jumittamisen. When the dozer blade 4 is in the working position, the bull eyes 9 used in the articulation of the dozer blade 4 make it possible to tilt the blade without it sticking to the frame structure of the lower blade. In the transport position, the dozer blade is attached or almost attached to the frame plate. When working on the lower blade, it is common for the frame plates 1A, 1B not to be in the same plane, due to the inclination of the road or the desired inclination. In this case, when the dozer blade 4 is raised to the transport position, using the structure described in the applicant's patent, the dozer blade 4 is caught towards something before reaching the maximum height (i.e. the height closest to the body 60). This could damage the hydraulic line that turns the dozer blade to the working position. Therefore, the base blade 21 preferably has a double pressure restrictor 71, with which the pressure is limited to the desired one, so that the dozer blade 4 or parts of the base blade 21 are not damaged. The invention is not to be construed as limited to the appended claims but is to be construed as including all legal equivalents thereof and combinations of the disclosed embodiments.

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List of reference numbers used: 1A right-hand suspension frame 1B left-hand suspension frame 2 subframe 3A, 3B adjusting foot 4 dozer blade 5 hydraulic cylinder 6 hydraulic cylinder 7 transfer groove 9 ox eye 63 shank eye 62 hinge pin 20 hinge pin tractor 21 body plate mounting lug 65 fitting 71 double pressure relief valve 72 vehicle / implement / similar hydraulic block o 73 tilt foot control block / valve O 74 selector switch x 25 75 tilt foot control block / valve N PA pressure accumulator ET return line to hydraulic oil tank 3

O 9 30

Claims (13)

Claims: Suspension arrangement for planer blades (21) for use in a vehicle, a work machine or the like, characterized in that: the suspension arrangement comprises: - a suspension frame (1A) on the right side and one from this separate suspension frame (1B) on the left side, which each are arranged separately from each other and fastened or fastened to the frame (60) of the vehicle, work machine or equivalent by means of a threaded joint (64, 65), preferably through an auxiliary body (2); and - an adjusting foot (3A) affecting the suspension frame (1A) on the right side and an adjusting foot (3B) affecting the suspension frame (1B) on the left side, which adjusting feet (3A, 3B) length can be adjusted separately, and which are arranged so that the sliding blade (4) in working position can be inclined towards the frame (60), so that the angle of the lower edge of the sliding blade (4) relative to the horizontal is changed by adjusting the mutual height of the adjusting feet (3A, 3B); except that: the sliding blade (4) is fixed separately both in the suspension frame (1A) on the right side and in the suspension frame (1B) on the left side by means of a hinge construction which allows rotation, in particular an ox eye (9). Suspension arrangement according to claim 1, wherein the sliding blade N 25 (4) is below a frame (60) of a vehicle, a work machine or equivalent and can be pivoted between working position and transport position <Q by means of a number of hydraulic cylinders (5, 6). A suspension arrangement according to claim 2, wherein one of the hydraulic cylinders is a pivot cylinder (5), which is arranged to pivot the sliding blade (4) between the working position and the transport position. Suspension arrangement according to claim 3, wherein the second N of the hydraulic cylinders is a moving cylinder (6), which is arranged to move a pivot point of the sliding blade. Suspension arrangement according to any one of the preceding claims, wherein of the hinge structures which allow rotation of the suspension of the sliding blade (4), the first is a fixedly mounted hinge structure and the second is movably mounted in an element with a mold structure, and wherein the hydraulic cylinder is arranged to move on the hinge structure in the element with mold construction. Suspension arrangement according to any one of the preceding claims, wherein the hinge structures that allow rotation are ox eyes or comprise one. Suspension arrangement according to claim 3 - and in addition alternatively also according to any one of claims 4, 5 or 6, wherein the movement of the swing cylinder (5) in a direction opposite to the working direction of the sliding blade (4) is limited by means of a pressure relief valve. Suspension arrangement according to claim 7, wherein the pressure relief valve is a double pressure relief valve, which is arranged to limit the force directed towards the pivot cylinder (5) in the working direction of the sliding blade (4) and on the other hand also the force directed towards the pivot cylinder (5) in a direction opposite to the working direction of the firing blade (4). Suspension arrangement according to any one of the preceding claims, wherein the adjusting feet (3A, 3B) are telescopic adjusting feet, the opening and closing thereof being preferably realized with a hydraulic cylinder which actuates the adjusting foot. O A suspension arrangement for a planer blade (21) according to any one of the preceding claims, wherein the adjusting feet (3A, 3B) are N connected in parallel to a common pressure line (P1, P2), and r wherein each of the adjusting foot control blocks / valve (75, 73 ) can be controlled T 30 via a selector (74). 3 Suspension arrangement for a planer blade (21) according to any one of the preceding claims, wherein the pressure line of the adjusting feet (3A, 3B) has a pressure accumulator (PA). Suspension arrangement for a planer blade (21) according to any one of the preceding claims, which is also according to any of claims 2-4, and wherein the pressure lines (P1, P2) of the hydraulic cylinder or hydraulic cylinders (5, 6) have a pressure accumulator (PA). A vehicle, work machine or the like, comprising a suspension arrangement for a planer blade (21) according to any one of the preceding claims. O N O N <+ O K N I x a n 00 LO O O N