WO2000078125A1 - Device for frontmounting of an implement on a vehicle - Google Patents

Device for frontmounting of an implement on a vehicle Download PDF

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Publication number
WO2000078125A1
WO2000078125A1 PCT/SE2000/001222 SE0001222W WO0078125A1 WO 2000078125 A1 WO2000078125 A1 WO 2000078125A1 SE 0001222 W SE0001222 W SE 0001222W WO 0078125 A1 WO0078125 A1 WO 0078125A1
Authority
WO
WIPO (PCT)
Prior art keywords
locking
implement
pivoting
arm
supporting arms
Prior art date
Application number
PCT/SE2000/001222
Other languages
French (fr)
Inventor
Jan Klasson
Original Assignee
Stiga Ab
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 Stiga Ab filed Critical Stiga Ab
Priority to DE10084701T priority Critical patent/DE10084701T1/en
Priority to AU57208/00A priority patent/AU5720800A/en
Priority to GB0127947A priority patent/GB2365743B/en
Publication of WO2000078125A1 publication Critical patent/WO2000078125A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
    • A01B59/04—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor
    • A01B59/048—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor having pulling or pushing means arranged on the front part of the tractor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B71/00—Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes
    • A01B71/08—Means for protecting against dust, or the like, or for cleaning agricultural implements
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/64—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
    • A01D34/66—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle with two or more cutters
    • A01D34/661—Mounting means
    • A01D34/662—Mounting means to the front of the vehicle
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/64—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
    • A01D2034/645—Lifting means for the cutter of the lawnmower mounted at the front of the vehicle for inspection and maintenance
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D2101/00—Lawn-mowers

Definitions

  • the present invention relates to a device for front - mounting of an implement, such as a lawnmower assembly, on an implement -carrying vehicle, said device having two supporting arms, from which the implement is suspended and which are adapted to be mounted in the front part of the vehicle in such manner that they project forwards from the vehicle and are connected to the vehicle so as to be pivotable about a transverse, horizontal, first axis, the implement in its front portion being connected, pivotably about a second axis parallel to the first axis, to the supporting arms near the front ends thereof to be pivotable relative to the supporting arms between a first end position and a second end position, which is a cleaning position, and the implement, when located in an in- termediate pivoting position near the first end position, being connected in its rear portion to each supporting arm by means of a coupling mechanism, which is disengageable to release the implement for pivoting to the cleaning position.
  • an implement such as a lawnmower assembly
  • each of the two coupling mechanisms consists of a laterally inward protruding projection arranged on the respective supporting arms, said projection having a vertical through hole, and a locking pin which is arranged on the lawnmower assembly and which is adapted to be inserted into the hole of the projection.
  • the obj ect of the present invention is thus to provide a device , whose coupling mechanisms are constructed such that this drawback is obviated , i . e . that it is not necessary to handle and keep any loose parts .
  • this obj ect is achieved by means of a device , which is of the kind stated by way of introduction and characterised m that the coupl ing mechanism has a coupling part connected to the respective support ing arms and having a guiding slot formed therein, m which a locking pm , which is parallel to said axes , is arranged for parallel displacement between a locking position and a release posit ion , and a backwards proj ecting locking arm which is connected to the implement and which is adapted to cooperate with the locking pm to prevent pivoting of the implement from said intermediate pivoting position to the cleaning posi tion, when the locking pm is m the locking pos ition, and to allow such pivot ing , when the locking pm is m the release position, the guiding slot , the locking pin and the locking arm being designed and dimensioned for this purpose such manner that the locking arm, when the implement is m said intermediate pivoting position and the locking p is m the locking position , a
  • the guiding slot is designed such manner that the locking pm is, by its own weight, retained m and returns to the locking position, respectively, when the supporting arms are located m a substantially horizontal pivoting position.
  • the coupling of the rear portion of the implement to the sup- porting arms is automatically ensured.
  • the locking pm is connected to a parallel bearing pm by means of a connecting arm, the bearing pm is rotatably mounted m the coupling part, and the guiding slot has the shape of a circular arc, whose centre axis coincides with the axis of rotation of the bearing pm.
  • the locking arm is preferably formed such manner that it constitutes a support intended for the implement and resting on a base, such as the ground, when the lm- plement is located in the cleaning position and the supporting arms are located m a highly elevated pivoting position.
  • FIG. 1 is a schematic side view showing a lawnmower assembly in a working position.
  • Fig. 2 corresponds to Fig. 1 but shows the lawnmower assembly in a pivoting position, in which it is raised at the rear m relation to the working position.
  • Fig. 3 corresponds to Figs 1 and 2 but shows the lawnmower assembly m a pivoting position, m which it is lowered at the rear in relation to the working position.
  • Fig. 4 corresponds to Figs 1-3 but shows the lawn- mower assembly m a cleaning position.
  • Fig. 5 is a side view of a coupling mechanism.
  • Fig. 6 is a cross-sectional view of the coupling mechanism along the line VI -VI m Fig. 5.
  • Figs 1-4 show a lawnmower assembly 1, which is front - mounted on an implement -carrying vehicle 2, of which only part of a vehicle chassis 3 and one (the right one) of the two front wheels 4 are shown.
  • the lawnmower assembly 1 is suspended from two supporting arms 5, which at their rear end are pivotally mounted on a respective one of the projecting axles 6 of the two front wheels 4 and which project forwards from the vehicle 2.
  • the supporting arms 5 are pivotable between a lowered position, which is shown m Figs 1-3 and which support wheels 7, which are arranged in the front portion of the lawnmower assembly 1, rest on the ground 8, and a highly elevated pivoting position, which is shown m Fig. 4.
  • the supporting arms 5 can be pivoted by means of a lifting device (not shown) between the lowered position and a less elevated pivoting position (not shown) , in which the lawnmower assembly 1 is in a transport position in which the support wheels 7 are raised from the ground 8.
  • the lawnmower assembly 1 is in its front portion connected, pivotably about an axis 9 parallel to the front wheel axles 6, to the supporting arms 5 at the front ends thereof to be pivotable relative to the supporting arms 5 between a first end position, which is shown m Fig. 2, and a second end position, which is shown m Fig. 4 and which defines the cleaning position of the lawnmower assembly 1.
  • a first end position which is shown m Fig. 2
  • a second end position which is shown m Fig. 4 and which defines the cleaning position of the lawnmower assembly 1.
  • each supporting arm 5 When the lawnmower assembly 1 is m the thus defined, substantially horizontal working position, it is connected its rear portion to each supporting arm 5 by means of a coupling mechanism 10, which is disengageable to release the lawnmower assembly 1 for pivoting relative to the supporting arms 5 to the second end position (the cleaning position) .
  • the coupling mechanisms 10 will now be described m more detail, “upper”, “lower” and corresponding terms m the description below referring to the position of the supporting arms 5 which is shown m Figs 1-3, i.e. the substantially horizontal, lowered position.
  • the coupling mechanisms 10 at both sides of the vehicle 2 are identical.
  • Each coupling mechanism 10 has a substantially U-shaped coupling part 11 with vertical legs 11a and lib, which extend forwards from a vertical web portion lie.
  • the coupling part 11 is connected to a projection 12, which protrudes downwards from the respective supporting arms 5 and extends down between the two legs lla and lib of the coupling part 11 adjacent to the web portion lie.
  • the projection 12 has a U-shaped cross- section and its web portion 12a abuts against the mside of one leg lla of the coupling part 11.
  • a longitudinal slit (not shown) is formed m the web portion 12a of the projection 12.
  • a bolt 13 extends through a hole (not shown) m the leg lla of the coupling part 11 and through the slit m the web portion 12a of the projection 12.
  • a nut 14 is screwed onto the bolt 13 to fix the coupling part 11 on the projection 12. Thanks to the slit, the vertical position of the coupling part 11 on the projection 12 can be set before the nut 14 is tightened.
  • the coupling part 11 has an arcuate guiding slot 15, which is formed of two opposed, arcuate slits the two legs lla and lib of the coupling part 11.
  • Two opposed bearing holes 16 are also formed m the two legs lla and lib.
  • the axis of the holes 16 coincides with the axis of the arcuate guiding slot 15 and is parallel to the front wheel axles 6 and the pivot axis 9.
  • the coupling mechanism 10 further has a locking pm 17, which is parallel to the axis of the holes 16 and which is placed m the guiding slot 15 to extend through the two slits of the coupling part 11.
  • the locking pin 17 is connected to a parallel bearing pm 18 by means of a connecting arm 19, which is located outside the leg lib of the coupling part 11.
  • the bearing pm 18 is rotatably mounted m the holes 16 m the two legs lla and lib of the coupling part 11.
  • the locking pm 17 is thus freely rotatable about the axis of the bearing pm 18 for parallel displacement m the guiding slot 15 between a lower locking position, which is shown by an unbroken line m Fig.
  • the guiding slot 15 is formed in such manner that the locking pm 17 is retained by its own weight m the locking position or returns to the locking position, when the supporting arms 5 are in a substantially horizontal pi- voting position.
  • the coupling mechanism 10 also has a locking arm 20, which is connected to the rear portion of the lawnmower assembly 1 and projects backwards, said locking arm being adapted to cooperate with the locking pm 17 to prevent the lawnmower assembly 1 from being pivoted from its first end position to its second end position, when the locking p is in the locking position, and to allow such pivoting, when the locking pin 17 is in the release position.
  • a locking arm 20 which is connected to the rear portion of the lawnmower assembly 1 and projects backwards, said locking arm being adapted to cooperate with the locking pm 17 to prevent the lawnmower assembly 1 from being pivoted from its first end position to its second end position, when the locking p is in the locking position, and to allow such pivoting, when the locking pin 17 is in the release position.
  • the guiding slot 15, the locking pm 17 and the locking arm 20 are designed and dimensioned m such manner that the locking arm 20, when the lawnmower assembly 1 is said intermediate pivoting position and the locking pm 17 is m the locking posi- tion, abuts against the locking p from above due to the weight of the lawnmower assembly 1, and that the locking arm 20, when the lawnmower assembly 1 is m its first end position, is lifted away from the locking pm 17 and allows free movement of the locking pm to the release position, m which the locking pm 17 m its turn allows free passage for the locking arm 20 m the pivot ing of the lawnmower assembly 1 to the second end posit ion.
  • the lawnmower assembly 1 In the initial position shown m Fig . 1 , in which the supporting arms 5 are in their lowered posit ion and the lawnmower assembly 1 is its intermediate pivoting position, the lawnmower assembly 1 taking its working position, the locking arms 20 abut against the locking pins 17 , which are placed m the locking posit ion and which thus prevent pivoting of the lawnmower assembly 1 towards the second end position .
  • the lawnmower assembly 1 is , however, pivotable between the intermediate pivoting position and the first end position . This is a particular advantage if , operation, the lawnmower assembly 1 bumps into some kind of obstacle on the ground 8 .
  • the rear portion of the lawn- mower assembly 1 is first lifted a distance , which means that the lawnmower assembly is pivoted to the first end position (Fig . 2 ) .
  • the locking pins 17 are then released and can be moved to the release position, after which the rear portion of the lawnmower assembly 1 is let down to the ground 8 to a position, m which wheels 21 , which are mounted the rear portion of the lawnmower assembly 1 , will abut against the ground 8 (Fig . 3 ) . From this position, the lawnmower assembly 1 is then pivoted to the cleaning position by raising of its front portion to the position shown Fig .

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Zoology (AREA)
  • Body Structure For Vehicles (AREA)
  • Agricultural Machines (AREA)
  • Harvester Elements (AREA)

Abstract

A device for frontmounting of an implement (1) on a vehicle (2) has two supporting arms (5), from which the implement (1) is suspended in its front portion so as to be pivotable about a transverse axis (9). The implement (1) is in its rear portion connected to each supporting arm (5) by means of a coupling mechanism (10), which is disengageable to release the implement (1) for pivoting relative to the supporting arms (5). The coupling mechanism (10) has a coupling part (11) connected to the respective supporting arm (5) and having a guiding slot (15), in which a locking pin (17) which is parallel to said axis (9) is arranged for parallel displacement between a locking position and a release position. The coupling mechanism (10) also has a backwards projecting locking arm (20), which is connected to the implement (1) and which is adapted to cooperate with the locking pin (17) to prevent pivoting of the implement, when the locking pin is in the locking position, and to allow such pivoting, when the locking pin (17) is in the release position.

Description

DEVICE FOR FRONTMOUNTING OF AN IMPLEMENT ON A VEHICLE
The present invention relates to a device for front - mounting of an implement, such as a lawnmower assembly, on an implement -carrying vehicle, said device having two supporting arms, from which the implement is suspended and which are adapted to be mounted in the front part of the vehicle in such manner that they project forwards from the vehicle and are connected to the vehicle so as to be pivotable about a transverse, horizontal, first axis, the implement in its front portion being connected, pivotably about a second axis parallel to the first axis, to the supporting arms near the front ends thereof to be pivotable relative to the supporting arms between a first end position and a second end position, which is a cleaning position, and the implement, when located in an in- termediate pivoting position near the first end position, being connected in its rear portion to each supporting arm by means of a coupling mechanism, which is disengageable to release the implement for pivoting to the cleaning position. In a prior-art device of this kind, which is mounted on a ride -on lawnmower, the implement thus being a lawn- mower assembly, each of the two coupling mechanisms consists of a laterally inward protruding projection arranged on the respective supporting arms, said projection having a vertical through hole, and a locking pin which is arranged on the lawnmower assembly and which is adapted to be inserted into the hole of the projection. When the lawnmower assembly is located in the intermediate pivoting position relative to the supporting arms, the locking pin extends from the underside through the hole of the projection and is retained in the same by means of a locking peg, which extends through a transverse hole in the locking pin. When the underside of the lawnmower assembly, where its knives are mounted, is to be cleaned and the assembly is to be pivoted for this purpose to its substantially vertical cleaning position, the locking peg m each one of the two coupling mechanisms must f irst be removed from the respective locking pins . An important drawback m this connection i s that the locking pegs must be stored safely after extraction, since m the subsequent coupl ing of the rear port ion of the lawnmower assembly to the supporting arms they must be reinserted manually into the locking pm holes to se- cure the coupling .
The obj ect of the present invention is thus to provide a device , whose coupling mechanisms are constructed such that this drawback is obviated , i . e . that it is not necessary to handle and keep any loose parts . According to the present invention, this obj ect is achieved by means of a device , which is of the kind stated by way of introduction and characterised m that the coupl ing mechanism has a coupling part connected to the respective support ing arms and having a guiding slot formed therein, m which a locking pm , which is parallel to said axes , is arranged for parallel displacement between a locking position and a release posit ion , and a backwards proj ecting locking arm which is connected to the implement and which is adapted to cooperate with the locking pm to prevent pivoting of the implement from said intermediate pivoting position to the cleaning posi tion, when the locking pm is m the locking pos ition, and to allow such pivot ing , when the locking pm is m the release position, the guiding slot , the locking pin and the locking arm being designed and dimensioned for this purpose such manner that the locking arm, when the implement is m said intermediate pivoting position and the locking p is m the locking position , abuts against the locking pm , and that the locking arm, when the implement is m said f irst end position, is moved away f rom the locking pm and allows free movement of the locking pm to the release position, in which the locking pm m its turn allows free passage for the locking arm m the pivoting of the implement to the cleaning position.
Advantageously, the guiding slot is designed such manner that the locking pm is, by its own weight, retained m and returns to the locking position, respectively, when the supporting arms are located m a substantially horizontal pivoting position. As a result, the coupling of the rear portion of the implement to the sup- porting arms is automatically ensured.
In a preferred embodiment, the locking pm is connected to a parallel bearing pm by means of a connecting arm, the bearing pm is rotatably mounted m the coupling part, and the guiding slot has the shape of a circular arc, whose centre axis coincides with the axis of rotation of the bearing pm.
The locking arm is preferably formed such manner that it constitutes a support intended for the implement and resting on a base, such as the ground, when the lm- plement is located in the cleaning position and the supporting arms are located m a highly elevated pivoting position.
The invention will now be described m more detail with reference to the accompanying drawings. Fig. 1 is a schematic side view showing a lawnmower assembly in a working position.
Fig. 2 corresponds to Fig. 1 but shows the lawnmower assembly in a pivoting position, in which it is raised at the rear m relation to the working position. Fig. 3 corresponds to Figs 1 and 2 but shows the lawnmower assembly m a pivoting position, m which it is lowered at the rear in relation to the working position.
Fig. 4 corresponds to Figs 1-3 but shows the lawn- mower assembly m a cleaning position. Fig. 5 is a side view of a coupling mechanism.
Fig. 6 is a cross-sectional view of the coupling mechanism along the line VI -VI m Fig. 5. Figs 1-4 show a lawnmower assembly 1, which is front - mounted on an implement -carrying vehicle 2, of which only part of a vehicle chassis 3 and one (the right one) of the two front wheels 4 are shown. The lawnmower assembly 1 is suspended from two supporting arms 5, which at their rear end are pivotally mounted on a respective one of the projecting axles 6 of the two front wheels 4 and which project forwards from the vehicle 2. The supporting arms 5 are pivotable between a lowered position, which is shown m Figs 1-3 and which support wheels 7, which are arranged in the front portion of the lawnmower assembly 1, rest on the ground 8, and a highly elevated pivoting position, which is shown m Fig. 4. The supporting arms 5 can be pivoted by means of a lifting device (not shown) between the lowered position and a less elevated pivoting position (not shown) , in which the lawnmower assembly 1 is in a transport position in which the support wheels 7 are raised from the ground 8. The lawnmower assembly 1 is in its front portion connected, pivotably about an axis 9 parallel to the front wheel axles 6, to the supporting arms 5 at the front ends thereof to be pivotable relative to the supporting arms 5 between a first end position, which is shown m Fig. 2, and a second end position, which is shown m Fig. 4 and which defines the cleaning position of the lawnmower assembly 1. When the lawnmower assembly 1 is m a determined, intermediate pivoting position relative to the supporting arms 5 and the sup- porting arms 5 are their lowered position, m which they are substantially horizontal, the lawnmower assembly 1 takes a substantially horizontal working position (Fig. 1) . This intermediate pivoting position is located near the first end position (cf. Figs 1 and 2). When the lawnmower assembly 1 is m the thus defined, substantially horizontal working position, it is connected its rear portion to each supporting arm 5 by means of a coupling mechanism 10, which is disengageable to release the lawnmower assembly 1 for pivoting relative to the supporting arms 5 to the second end position (the cleaning position) . The coupling mechanisms 10 will now be described m more detail, "upper", "lower" and corresponding terms m the description below referring to the position of the supporting arms 5 which is shown m Figs 1-3, i.e. the substantially horizontal, lowered position. The coupling mechanisms 10 at both sides of the vehicle 2 are identical. Each coupling mechanism 10 has a substantially U-shaped coupling part 11 with vertical legs 11a and lib, which extend forwards from a vertical web portion lie. The coupling part 11 is connected to a projection 12, which protrudes downwards from the respective supporting arms 5 and extends down between the two legs lla and lib of the coupling part 11 adjacent to the web portion lie. The projection 12 has a U-shaped cross- section and its web portion 12a abuts against the mside of one leg lla of the coupling part 11. A longitudinal slit (not shown) is formed m the web portion 12a of the projection 12. A bolt 13 extends through a hole (not shown) m the leg lla of the coupling part 11 and through the slit m the web portion 12a of the projection 12. A nut 14 is screwed onto the bolt 13 to fix the coupling part 11 on the projection 12. Thanks to the slit, the vertical position of the coupling part 11 on the projection 12 can be set before the nut 14 is tightened.
The coupling part 11 has an arcuate guiding slot 15, which is formed of two opposed, arcuate slits the two legs lla and lib of the coupling part 11. Two opposed bearing holes 16 are also formed m the two legs lla and lib. The axis of the holes 16 coincides with the axis of the arcuate guiding slot 15 and is parallel to the front wheel axles 6 and the pivot axis 9.
The coupling mechanism 10 further has a locking pm 17, which is parallel to the axis of the holes 16 and which is placed m the guiding slot 15 to extend through the two slits of the coupling part 11. The locking pin 17 is connected to a parallel bearing pm 18 by means of a connecting arm 19, which is located outside the leg lib of the coupling part 11. The bearing pm 18 is rotatably mounted m the holes 16 m the two legs lla and lib of the coupling part 11. The locking pm 17 is thus freely rotatable about the axis of the bearing pm 18 for parallel displacement m the guiding slot 15 between a lower locking position, which is shown by an unbroken line m Fig. 5 and m which the locking pm 17 abuts against the lower end wall of the guiding slot 15, and an upper release position, which is shown by a dashed line Fig. 5 and m which the locking pm 17 abuts against the upper end wall of the guiding slot 15. As appears from Fig. 5, the guiding slot 15 is formed in such manner that the locking pm 17 is retained by its own weight m the locking position or returns to the locking position, when the supporting arms 5 are in a substantially horizontal pi- voting position.
Finally, the coupling mechanism 10 also has a locking arm 20, which is connected to the rear portion of the lawnmower assembly 1 and projects backwards, said locking arm being adapted to cooperate with the locking pm 17 to prevent the lawnmower assembly 1 from being pivoted from its first end position to its second end position, when the locking p is in the locking position, and to allow such pivoting, when the locking pin 17 is in the release position. As appears from Fig. 5, the guiding slot 15, the locking pm 17 and the locking arm 20 are designed and dimensioned m such manner that the locking arm 20, when the lawnmower assembly 1 is said intermediate pivoting position and the locking pm 17 is m the locking posi- tion, abuts against the locking p from above due to the weight of the lawnmower assembly 1, and that the locking arm 20, when the lawnmower assembly 1 is m its first end position, is lifted away from the locking pm 17 and allows free movement of the locking pm to the release position, m which the locking pm 17 m its turn allows free passage for the locking arm 20 m the pivot ing of the lawnmower assembly 1 to the second end posit ion.
In the initial position shown m Fig . 1 , in which the supporting arms 5 are in their lowered posit ion and the lawnmower assembly 1 is its intermediate pivoting position, the lawnmower assembly 1 taking its working position, the locking arms 20 abut against the locking pins 17 , which are placed m the locking posit ion and which thus prevent pivoting of the lawnmower assembly 1 towards the second end position . The lawnmower assembly 1 is , however, pivotable between the intermediate pivoting position and the first end position . This is a particular advantage if , operation, the lawnmower assembly 1 bumps into some kind of obstacle on the ground 8 .
When the underside of the lawnmower assembly 1 is to be cleaned and the lawnmower assembly is to be pivoted to the cleaning position, the rear portion of the lawn- mower assembly 1 is first lifted a distance , which means that the lawnmower assembly is pivoted to the first end position (Fig . 2 ) . The locking pins 17 are then released and can be moved to the release position, after which the rear portion of the lawnmower assembly 1 is let down to the ground 8 to a position, m which wheels 21 , which are mounted the rear portion of the lawnmower assembly 1 , will abut against the ground 8 (Fig . 3 ) . From this position, the lawnmower assembly 1 is then pivoted to the cleaning position by raising of its front portion to the position shown Fig . 4 , in which the lawnmower assembly 1 is its second end position relative to the supporting arms 5 , which m their turn are m their highly elevated pivoting position . During the maj or part of this pivoting movement , the wheels 21 are rolling on the ground 8 . In the position shown m Fig . 4 , the two lock- ing arms 20 are stuck in the ground 8 and stabilise the lawnmower assembly 1 in the cleaning position.
When after cleaning the lawnmower assembly 1 is returned to the initial position shown in Fig. 1, the locking arms 20 abut against the locking pins 17 and lift them away. When the locking arms 20 have passed the guiding slots 15 and the lawnmower assembly 1 has reached the first end position, the locking pins 17 fall back to the locking position. After this, the rear portion of the lawnmower assembly 1 is let down a distance, so that the locking arms 20 will abut against the locking pins 17.

Claims

1. A device for f rontmounting of an implement (1), such as a lawnmower assembly, on an implement -carrying vehicle (2) , said device having two supporting arms (5), from which the implement (1) is suspended and which are adapted to be mounted in the front part of the vehicle in such manner that they project forwards from the vehicle and are connected to the vehicle so as to be pivotable about a transverse, horizontal, first axis, the implement (1) in its front portion being connected, pivotably about a second axis (9) parallel to the first axis, to the supporting arms (5) near the front ends thereof to be pivot - able relative to the supporting arms between a first end position and a second end position, which is a cleaning position, and the implement (1), when located in an intermediate pivoting position near the first end position, being connected in its rear portion to each supporting arm (5) by means of a coupling mechanism (10) , which is disengageable to release the implement (1) for pivoting to the cleaning position, c h a r a c t e r i s e d in that the coupling mechanism (10) has a coupling part (11) connected to the respective supporting arms (5) and having a guiding slot (15) formed therein, in which a locking pin (17), which is parallel to said axes, is arranged for parallel displacement between a locking position and a release position, and a backwards projecting locking arm (20), which is connected to the implement (1) and which is adapted to cooperate with the locking pin (17) to prevent pivoting of the implement (1) from said intermediate pivoting position to the cleaning position, when the locking pin is in the locking position, and to allow such pivoting, when the locking pin (17) is in the release position, the guiding slot (15) , the locking pin (17) and the locking arm (20) being designed and dimensioned for this purpose in such manner that the locking arm (20) , when the implement is m said intermediate pivoting position and the locking pm (17) is m the locking position, abuts against the locking pm (17) , and that the locking arm (20) , when the implement (1) is said first end position, is moved away from the locking pm (17) and allows free movement of the locking p to the release position, in which the locking pin (17) m its turn allows free passage for the locking arm (20) m the pivoting of the implement (1) to the cleaning position.
2. A device as claimed in claim 1, c h a r a c t e r i s e d in that the guiding slot (15) is formed m such manner that the locking pm (17) is, by its own weight, retained in and returns to the locking position, respectively, when the supporting arms (5) are located in a substantially horizontal pivoting position.
3. A device as claimed m claim 1 or 2 , c h a r a c t e r i s e d that the locking pm (17) is connected to a parallel bearing pm (18) by means of a con- nectmg arm (19) , that the bearing pm (18) is rotatably mounted the coupling part (11) , and that the guiding slot (15) has the shape of a circular arc, whose centre axis coincides with the axis of rotation of the bearing pin (18) .
4. A device as claimed m any one of the preceding claims, c h a r a c t e r i s e d m that the locking arm (20) is formed m such manner that it constitutes a support intended for the implement (1) and resting on a base (8) , such as the ground, when the implement is located m the cleaning position and the supporting arms (5) are located m a highly elevated pivoting position.
PCT/SE2000/001222 1999-06-17 2000-06-13 Device for frontmounting of an implement on a vehicle WO2000078125A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE10084701T DE10084701T1 (en) 1999-06-17 2000-06-13 Device for the front mounting of a tool on a vehicle
AU57208/00A AU5720800A (en) 1999-06-17 2000-06-13 Device for frontmounting of an implement on a vehicle
GB0127947A GB2365743B (en) 1999-06-17 2000-06-13 Device for frontmounting of an implement on a vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9902299A SE512601C2 (en) 1999-06-17 1999-06-17 Device for front mounting of an implement on a vehicle
SE9902299-8 1999-06-17

Publications (1)

Publication Number Publication Date
WO2000078125A1 true WO2000078125A1 (en) 2000-12-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/001222 WO2000078125A1 (en) 1999-06-17 2000-06-13 Device for frontmounting of an implement on a vehicle

Country Status (5)

Country Link
AU (1) AU5720800A (en)
DE (1) DE10084701T1 (en)
GB (1) GB2365743B (en)
SE (1) SE512601C2 (en)
WO (1) WO2000078125A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008133569A1 (en) * 2007-04-27 2008-11-06 Ggp Sweden Ab Device for frontmounting of an implement on a vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063635A (en) * 1979-11-26 1981-06-10 Birmid Qualcast Home & Garden Lawnmower
US4779406A (en) * 1987-10-19 1988-10-25 Schroeder Walter J Mower with tilting mower deck
US5079907A (en) * 1989-09-26 1992-01-14 Kubota Corporation Lawn mower having a tiltable blade housing
US5079926A (en) * 1989-09-07 1992-01-14 Nicol Alexander N Apparatus for varying height of cutting head
US5816035A (en) * 1996-01-17 1998-10-06 Shivvers, Inc. Mower deck mounting system
EP0891692A1 (en) * 1997-07-16 1999-01-20 Deere & Company Suspension of a mower connectable to a vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063635A (en) * 1979-11-26 1981-06-10 Birmid Qualcast Home & Garden Lawnmower
US4779406A (en) * 1987-10-19 1988-10-25 Schroeder Walter J Mower with tilting mower deck
US5079926A (en) * 1989-09-07 1992-01-14 Nicol Alexander N Apparatus for varying height of cutting head
US5079907A (en) * 1989-09-26 1992-01-14 Kubota Corporation Lawn mower having a tiltable blade housing
US5816035A (en) * 1996-01-17 1998-10-06 Shivvers, Inc. Mower deck mounting system
EP0891692A1 (en) * 1997-07-16 1999-01-20 Deere & Company Suspension of a mower connectable to a vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008133569A1 (en) * 2007-04-27 2008-11-06 Ggp Sweden Ab Device for frontmounting of an implement on a vehicle

Also Published As

Publication number Publication date
GB2365743B (en) 2003-05-14
GB2365743A (en) 2002-02-27
GB0127947D0 (en) 2002-01-16
SE9902299L (en) 2000-04-10
AU5720800A (en) 2001-01-09
DE10084701T1 (en) 2002-05-29
SE512601C2 (en) 2000-04-10
SE9902299D0 (en) 1999-06-17

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