WO1989006612A1 - Loader mounting arrangement in a timber-carrying truck - Google Patents

Loader mounting arrangement in a timber-carrying truck Download PDF

Info

Publication number
WO1989006612A1
WO1989006612A1 PCT/FI1989/000002 FI8900002W WO8906612A1 WO 1989006612 A1 WO1989006612 A1 WO 1989006612A1 FI 8900002 W FI8900002 W FI 8900002W WO 8906612 A1 WO8906612 A1 WO 8906612A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheath
mounting arrangement
timber
longitudinal
truck
Prior art date
Application number
PCT/FI1989/000002
Other languages
French (fr)
Inventor
Heikki Jokela
Original Assignee
Interwood Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interwood Oy filed Critical Interwood Oy
Publication of WO1989006612A1 publication Critical patent/WO1989006612A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/54—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using cranes for self-loading or self-unloading
    • B60P1/5471—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using cranes for self-loading or self-unloading the crane being detachable from the vehicle
    • B60P1/548—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using cranes for self-loading or self-unloading the crane being detachable from the vehicle and having a first pivot on a vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors

Definitions

  • the present invention relates to an improved mounting and con ⁇ trol arrangement for loaders used in timber-carrying trucks.
  • Such loaders are required to be movable in the longitudinal di ⁇ rection of the vehicle between the loading position and the hauling position because of e.g. the restricted loader range, which is due to the loader's structural weight.
  • the movement takes olace by means of a transfer cylinder, whereupon the longitudinal beams forming a part of the loading frame move with sufficient play inside sheath members mounted on the body or auxiliary body of the truck. Since the bodywork of a truck with a high carrying capacity is as such a relatively resilient whole, the above-mentioned sufficient play must be consider ⁇ able.
  • the consi ⁇ derable required play can, however, cause intolerable shock ⁇ like stress on the structures.
  • the present invention eliminates the danger of occurrance of the said powerful shock stresses without, however, making structures more complex or increasing the cost of manufacture.
  • Figure 1 shows a side view of the tractor of a timber-carrying truck with its loader arrangement.
  • Figure 2 is a more detailed side view of the loader arrangement on the body/auxiliary body of the truck.
  • Figure 3 shows a cross-section A-A of the arrangement of figure 2.
  • Figure 4 shows one half of the cross-section in more detail.
  • Figure 5 shows a variant of the cross-section as shown in figure 4.
  • reference numeral 1 denotes the tractor of the timber-carrying truck, which is also load-carrying.
  • body 2 or auxialiary body 3 in the rear end area of the truck 1 are on both sides of the body/auxiliary body mounted sheaths 4 in ⁇ side which the longitudinal beams 6 of the loading frame 5 can move.
  • the said movement is achieved with a hydraulic cylinder 7 which is shown diagrammatically with broken lines.
  • the loader itself is generally referred to with numeral 8.
  • loader 8 with its frame 5 and its longitudinal beam 6 is first pushed into the suitable posterior position by means of the transfer cylinder in order to obtain the necessary loading space.
  • the supporting legs 9 included in the loader 8 are then pushed down by loader hydraulics by means of a hydrau ⁇ lic cylinder (not shown), whereupon the rear wheels of the truck obviously rise off the ground into the unloaded position.
  • the longitudinal beams 6 come into the position shown in figure 1 in which position the previously mentioned required Dlays are, as shown in figure 1, in the upper front edge area of sheath 4 as total play d and in the lower back edge area of sheath 4 as total olay d.
  • the loader 8 can simply be thought to be turned 180° for loading the trailer (not shown). Since the tractor 1 is now rather heavily loaded, the load - which is fairly small with respect to the total load - in the hook 10 of the loader 8 can no longer alter the positions of the total plays d (although the direction of the "tilting mo ⁇ ment" of the loader 8 changed) due to the fact that the sup ⁇ porting legs 9 still lean on their base.
  • the longitudinal beams 6 are formed of profiles which comprise straight vertical wall mem ⁇ bers 12 and basically almost semicircular upper and lower edge parts 13 which connect them.
  • the form of the inner surface of the sheath members 4 corresponds with the outer surface form of the longitudinal beams 6 enlarged by the halves of the total plays d and e, which are required throughout.
  • the longitudinal beam 6 must move "uphill" along the inner surface part 16 of the sheath member 4 as the steepness of the uphill slope continuously increases un ⁇ til wall 17 in the longitudinal beam 6 collides with the verti ⁇ cal part 18 of the sheath member's 4 inner wall. It can thus be noted that the movement of the longitudinal beam 6 in the di ⁇ rection of arrow 14 with respect to the sheath member 4 is ful ⁇ ly dampened.
  • Figure 5 shows another embodiment of the arrangement relating to the application.
  • the longitudinal profile 6 is basically hexagonal in form (similarly obviously also the form of the inner surface of the sheath member 4), the inner surface part 16, 16' forming the above-mentioned dampening "uphill slope" immediately as lateral movement 14, 14' occurs. It is, in fact, essential of the arrangement of the invention that the lateral movement in the direction of the arrow 14, 14 ' must in addition to working against the effect of the vertical force and frictional force determined by the friction coeffi ⁇ cient work also "uphill" in the said manner, that is, carry out work resulting from vertical movement.
  • the outer form of the lonqitudinal profile and the correspond ⁇ ing inner form of the sheath member may, of course, within the scope of the claims be different from those shown in the figu ⁇ res, for example, an octagonal profile or e.g. a completely circular profile.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Jib Cranes (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The present invention relates to a loader mounting arrangement in a timber-carrying truck, wherein a problem was previously presented by the possible lateral shocks caused by the longitudinal beams formed of rectangular profiles and forming a part of the loading frame when they move with sufficient play in their corresponding sheath members. The said disadvantage is eliminated by the invention by providing the longitudinal profiles with wall members inclined with respect to the horizontal direction, which wall members, in joining the corresponding inclined wall members of the sheath members, force the lateral horizontal movement of the longitudinal beams to work also in the vertical direction, whereupon the possible shock effects will be dampened.

Description

O 89/06612
Loader mounting arrangement in a timber-carrying truck
The present invention relates to an improved mounting and con¬ trol arrangement for loaders used in timber-carrying trucks.
Such loaders are required to be movable in the longitudinal di¬ rection of the vehicle between the loading position and the hauling position because of e.g. the restricted loader range, which is due to the loader's structural weight. The movement takes olace by means of a transfer cylinder, whereupon the longitudinal beams forming a part of the loading frame move with sufficient play inside sheath members mounted on the body or auxiliary body of the truck. Since the bodywork of a truck with a high carrying capacity is as such a relatively resilient whole, the above-mentioned sufficient play must be consider¬ able. In the longitudinal beam - sheath member - pairs formed of rectangular profiles which have been used so far, the consi¬ derable required play can, however, cause intolerable shock¬ like stress on the structures.
The present invention eliminates the danger of occurrance of the said powerful shock stresses without, however, making structures more complex or increasing the cost of manufacture.
The invention is described in the followin with reference to the enclosed drawings, wherein:
Figure 1 shows a side view of the tractor of a timber-carrying truck with its loader arrangement.
Figure 2 is a more detailed side view of the loader arrangement on the body/auxiliary body of the truck.
Figure 3 shows a cross-section A-A of the arrangement of figure 2. Figure 4 shows one half of the cross-section in more detail.
Figure 5 shows a variant of the cross-section as shown in figure 4.
In figure 1, reference numeral 1 denotes the tractor of the timber-carrying truck, which is also load-carrying. On the body 2 or auxialiary body 3 in the rear end area of the truck 1 are on both sides of the body/auxiliary body mounted sheaths 4 in¬ side which the longitudinal beams 6 of the loading frame 5 can move. The said movement is achieved with a hydraulic cylinder 7 which is shown diagrammatically with broken lines. The loader itself is generally referred to with numeral 8.
In commencing with the loading described in figure 1, in the usual manner loader 8 with its frame 5 and its longitudinal beam 6 is first pushed into the suitable posterior position by means of the transfer cylinder in order to obtain the necessary loading space. The supporting legs 9 included in the loader 8 are then pushed down by loader hydraulics by means of a hydrau¬ lic cylinder (not shown), whereupon the rear wheels of the truck obviously rise off the ground into the unloaded position. Thus, the longitudinal beams 6 come into the position shown in figure 1 in which position the previously mentioned required Dlays are, as shown in figure 1, in the upper front edge area of sheath 4 as total play d and in the lower back edge area of sheath 4 as total olay d. When the loading/unloading is carried out correctly in accordance with the loader manufacturer's instructions, the positions of plays d remain the same through¬ out the loading of the tractor.
Once the tractor 1 is fully loaded the loader 8 can simply be thought to be turned 180° for loading the trailer (not shown). Since the tractor 1 is now rather heavily loaded, the load - which is fairly small with respect to the total load - in the hook 10 of the loader 8 can no longer alter the positions of the total plays d (although the direction of the "tilting mo¬ ment" of the loader 8 changed) due to the fact that the sup¬ porting legs 9 still lean on their base.
Once the trailer is also fully loaded the supporting legs 9 are lifted up hydraulically and only now, due to the slowness determined by the operation of hydraulics, the positions of the total plays may temporarily change so that the plays take the positions d' shown in figure 2.
On the basis of the foregoing it may be noted that in acting according to the instructions of crane manufacturers and the user's own best experience, the positions of the vertical plays d, d' (figures 1 and 2) cannot change in a shock-like manner during use and thus shock stresses caused in this manner will not occur. In present structures, therefore, occur only the dampened shocks made possible by the horizontal plays e.
The dangerousness of all possible shock effects in this respect cannot be overemphasized; even an extremely slight steering mo¬ vement or neglection of such a movement of the size of a milli¬ meter or its fraction in the operatin levers of the requlatinq valves 11 affects the movement of the hook 10 by a very high coefficient. In such a situation all main plays (which are of course necessary for making operations possible) are extremely detrimental when undampened.
A closer look at the arrangement of the invention relating to the cross-sectional form of the longitudinal beams 6 and sheath members 4 will now be taken. As shown in figure 3, according to one embodiment of the invention the longitudinal beams 6 are formed of profiles which comprise straight vertical wall mem¬ bers 12 and basically almost semicircular upper and lower edge parts 13 which connect them. The form of the inner surface of the sheath members 4 corresponds with the outer surface form of the longitudinal beams 6 enlarged by the halves of the total plays d and e, which are required throughout.
From figure 4 can be seen that in moving the longitudinal beam 6 in the direction of arrow 14 inside the sheath member 4, the force resisting the said movement is at first only dependent on the perpendicular force between the surfaces and on the fricti¬ on coefficient.
Immediately after the initially common vertical symmetry axes 15 of the longitudinal beam 6 and the sheath member 4 become separated from each other as the longitudinal beam 6 moves un¬ der load in the direction of arrow 14 while the sheath member 4 remains solidly in position, the longitudinal beam 6 must move "uphill" along the inner surface part 16 of the sheath member 4 as the steepness of the uphill slope continuously increases un¬ til wall 17 in the longitudinal beam 6 collides with the verti¬ cal part 18 of the sheath member's 4 inner wall. It can thus be noted that the movement of the longitudinal beam 6 in the di¬ rection of arrow 14 with respect to the sheath member 4 is ful¬ ly dampened. The situation is equally advantageous also in the case that the upper edge part of the longitudinal profile 6 leans loaded on the inner lower surface of the upper edge part of the sheath member 4, regardless of whether the movement of the longitudinal profile 6 takes place in the direction of ar¬ row 14 or in the opposite direction.
The said feature must, therefore, be considered the perfect achievement of the aim to reduce shock stress without any addi¬ tional costs for construction arrangements.
Figure 5 shows another embodiment of the arrangement relating to the application. In this embodiment the longitudinal profile 6 is basically hexagonal in form (similarly obviously also the form of the inner surface of the sheath member 4), the inner surface part 16, 16' forming the above-mentioned dampening "uphill slope" immediately as lateral movement 14, 14' occurs. It is, in fact, essential of the arrangement of the invention that the lateral movement in the direction of the arrow 14, 14 ' must in addition to working against the effect of the vertical force and frictional force determined by the friction coeffi¬ cient work also "uphill" in the said manner, that is, carry out work resulting from vertical movement.
The outer form of the lonqitudinal profile and the correspond¬ ing inner form of the sheath member may, of course, within the scope of the claims be different from those shown in the figu¬ res, for example, an octagonal profile or e.g. a completely circular profile.

Claims

Claims
1. A loader mounting arrangement in a timber-carrying truck, c h a r a c t e r i z e d in that the effect of the necessarv play (d, d*f e) between the sheath member (4) mounted in the rear end area of the truck's body (2) or auxiliary body (3) and the longitudinal profile (6) moving inside the sheath member (4) by means of a hydraulic cylinder (7) is dampened during a transverse horizontal movement (14, 14') by providing the lon¬ gitudinal profile (6) with a wall member (19) inclined with respect to the horizontal direction, which wall member in lea¬ ning on the sheath member's wall member (16) similarly inclined with respect to the horizontal, during a transverse horizontal movement forces the movement to carry out vertical work as well, which dampens the possible shock effects while the plays are utilized.
2. A mounting arrangement as claimed in claim 1, c h a r a c ¬ t e r i z e d in that the longitudinal beams (6) are formed of profiles which comprise straight vertical wall members (12) and basically semi-circular upper and lower edge parts (13) which connect them, while the inner surface form of the sheath mem¬ bers (4) corresponds to the outer surface form of the longitu¬ dinal beams (6) enlarged by the halves of the total plays (d, e) required throughout.
PCT/FI1989/000002 1988-01-12 1989-01-05 Loader mounting arrangement in a timber-carrying truck WO1989006612A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI880108A FI80408C (en) 1988-01-12 1988-01-12 FAESTSYSTEM FOER EN TRAEVARULASTBILS LASTARE.
FI880108 1988-01-12

Publications (1)

Publication Number Publication Date
WO1989006612A1 true WO1989006612A1 (en) 1989-07-27

Family

ID=8525706

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1989/000002 WO1989006612A1 (en) 1988-01-12 1989-01-05 Loader mounting arrangement in a timber-carrying truck

Country Status (3)

Country Link
AU (1) AU2913689A (en)
FI (1) FI80408C (en)
WO (1) WO1989006612A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2152541A1 (en) * 2007-05-10 2010-02-17 Teijo Seppälä Lifting device for a vehicle and a vehicle equipped with the lifting device
AT511381A1 (en) * 2011-05-05 2012-11-15 Andreas Putzgruber LOADER

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1531174A1 (en) * 1967-09-22 1970-04-16 Demag Bagger & Kran Gmbh Telescopic boom for cranes and excavators with at least one retractable and extendable extension piece
DE2103570A1 (en) * 1971-01-26 1972-08-10 Gottwald Kg Leo Telescopic crane boom in frame construction
SE366528B (en) * 1971-07-08 1974-04-29 K Larsson
SE446615B (en) * 1983-11-18 1986-09-29 Pettersson Stig Console for mobile crane

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1531174A1 (en) * 1967-09-22 1970-04-16 Demag Bagger & Kran Gmbh Telescopic boom for cranes and excavators with at least one retractable and extendable extension piece
DE2103570A1 (en) * 1971-01-26 1972-08-10 Gottwald Kg Leo Telescopic crane boom in frame construction
SE366528B (en) * 1971-07-08 1974-04-29 K Larsson
SE446615B (en) * 1983-11-18 1986-09-29 Pettersson Stig Console for mobile crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2152541A1 (en) * 2007-05-10 2010-02-17 Teijo Seppälä Lifting device for a vehicle and a vehicle equipped with the lifting device
EP2152541A4 (en) * 2007-05-10 2010-06-09 Teijo Seppaelae Lifting device for a vehicle and a vehicle equipped with the lifting device
AT511381A1 (en) * 2011-05-05 2012-11-15 Andreas Putzgruber LOADER

Also Published As

Publication number Publication date
FI80408B (en) 1990-02-28
AU2913689A (en) 1989-08-11
FI80408C (en) 1990-06-11
FI880108A0 (en) 1988-01-12
FI880108A (en) 1989-07-13

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