EP0073200A1 - A supporting leg arrangement on the tow-bar of towed agricultural implements and the like - Google Patents
A supporting leg arrangement on the tow-bar of towed agricultural implements and the likeInfo
- Publication number
- EP0073200A1 EP0073200A1 EP81903206A EP81903206A EP0073200A1 EP 0073200 A1 EP0073200 A1 EP 0073200A1 EP 81903206 A EP81903206 A EP 81903206A EP 81903206 A EP81903206 A EP 81903206A EP 0073200 A1 EP0073200 A1 EP 0073200A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- supporting leg
- tow
- bar
- locking piston
- stop
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/58—Auxiliary devices
- B60D1/66—Props
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/04—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D49/00—Tractors
- B62D49/06—Tractors adapted for multi-purpose use
- B62D49/065—Coupling of multi-purpose tractors with equipment
Definitions
- the present invention relates to an arrangement for folding up and folding down a supporting leg on the tow-bar of towed agricultural implements.
- One embodiment of such an arrangement is already known from Swedish Patent 353-687, which shows and describes an arrangement wherein the shaft on a half-trailer cart or the like for attachment to the traction vehicle is equipped with a supporting prop which is mounted on the shaft and can be pivoted from a position in which it supports the shaft into an ineffective position under the effect of a lever rod, one end of which is designed to be acted on by the tractor and the other end of which pivots the supporting prop.
- the arrangement also comprises a device for locking the supporting prop in the folded-down position.
- the arrangement according to the Patent has obviously been beset with problems, since it has not become generally used.
- the arrangement according to the present invention has the design and is endowed with the characteristics which can be found in the accompanying Patent Claims.
- Figure 1 shows schematically a side view of an embodiment of a tow-bar with the supporting leg folded down
- Figure 2 shows the same tow-bar with the supporting leg folded up.
- a tow-bar 2 is equipped with a towing eye 3, and on its lower face it has a lug with a guide pin 15 on which the upper end of a supporting leg 1 is mounted pivotably.
- the supporting leg 1 is equipped at its upper end with a projection 16 which points backwards and along the tow-bar 2 when the supporting leg is folded down, this projection being equipped at the rear end of its upper edge with an abutment stop 17 pointing towards the rear.
- a sleeve 14 for a locking piston 13 is attached to the projection 16 adjacent to its free edge, in such a way that the locking piston 13 extends at right-angles to the supporting leg 1.
- the locking piston 13 is designed so that it may be moved between a terminal position wherein oneof its ends projects out of the sleeve 14 and beyond the rear edge of the projection 16. At its other end, which is permanently located outside the sleeve 14, it is connected via a pivot 12 to one end of a rod 11, the other end of which is connected via a pivot 10 to the free end of one arm 6 appertaining to a two-armed lever 6, 7 and which points upwards when the supporting leg 1 is folded up.
- the two-armed lever can be pivoted around a hinge 8 at the free end of the tow-bar 2.
- Its other arm 7 is equipped with a perpendicularly projecting plate 21 which is designed to rest against the towing eye 5 when the supporting leg 1 is folded up, and which is equipped with a throughbore 9 which in this position corresponds with and is co-axial to the towing eye 3.
- a tensioning spring 20 is attached between the tow-bar 2 and the arm 6 so that it tries to pull the arm 6 backwards.
- the towing eye 3 When the towing eye 3 is to be connected to a towing hook 4 which can be raised and lowered, on a tractor or some other traction vehicle, the latter is reversed until the towing hook 4 comes centrally under the towing eye 3, after which the towing hook 4 is raised so that it engages in the towing eye 3 and lifts it, together with the tow-bar 2, so that the supporting leg 1 is lifted from the ground. In so doing, the point of the plate 21 comes immediately into contact with a contact surface 5 rigidly connected to the tractor centrally above the towing hook 4. As lifting continues the plate 21 begins to be pressed downwards against the contact surface 5 and generally engages in a cut-out in it.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Agricultural Machines (AREA)
- Supports For Plants (AREA)
- Harvesting Machines For Root Crops (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
Dispositif pour une jambe de support (1) pour une barre d'attelage (2) avec un oeil ou anneau d'attelage (3) sur des outils agricoles atteles, pour replier et deplier la jambe de support (1) et pour la maintenir verrouillee dans la position depliee. Une plaque (21) se projette a angle droit depuis une extremite d'un levier a deux bras (6, 7) qui est monte de maniere pivotante a l'extremite libre de la barre d'attelage (2), de telle maniere que la plaque (21) puisse etre amenee pour s'appuyer contre l'oeil d'attelage (3). L'autre extremite du levier (6, 7) est articulee sur une extremite d'une tige (11). L'autre extremite de la tige (11) est articulee sur un piston de verrouillage (13) qui peut etre deplace dans un manchon (14) qui est fixe a angle droit sur la jambe de support (1) sur l'extremite libre d'une projection (16) qui se projette vers l'arriere depuis l'extremite superieure de la jambe de support (1). Au-dessus du manchon (14), la projection (16) est pourvue d'une butee pointee vers l'arriere (17) qui est concue pour que, lorsque la jambe de support (1) est depliee dans la position verticale, elle soit arretee par la butee (17) venant a l'encontre d'une butee (18) montee sur une oreille s'etendant vers le bas (19) sur la barre d'attelage (2). Un ressort de mise sous tension (20) est monte entre la barre d'attelage (2) et le bras (6) de maniere que lorsque la plaque (21) est inefficace, il tire le bras (6) vers l'arriere, la tige (11) comprime le piston de verrouillage (13) et la projection (16) vers l'arriere de maniere a deplier la jambe de support (1). Lorsque la butee (17) vient a l'encontre de la butee (18) et arrete le mouvement de depliage, la tige (11) pousse le piston de verrouillage alors horizontal (13) vers l'exterieur en arriere de telle sorte que son extremite libre s'engage sous la butee (18) et verrouille la jambe de support (1) en position verticale.Device for a support leg (1) for a drawbar (2) with a hitch eye or ring (3) on coupled agricultural implements, for folding and unfolding the support leg (1) locked in the unfolded position. A plate (21) projects at a right angle from one end of a two-arm lever (6, 7) which is pivotally mounted at the free end of the drawbar (2), so that the plate (21) can be brought to bear against the coupling eye (3). The other end of the lever (6, 7) is articulated on one end of a rod (11). The other end of the rod (11) is articulated on a locking piston (13) which can be moved in a sleeve (14) which is fixed at right angles to the support leg (1) on the free end d 'a projection (16) which projects towards the rear from the upper end of the support leg (1). Above the sleeve (14), the projection (16) is provided with a rearward pointing stop (17) which is designed so that, when the support leg (1) is folded out in the vertical position, it either stopped by the stop (17) coming against a stop (18) mounted on an ear extending downwards (19) on the drawbar (2). A tensioning spring (20) is mounted between the drawbar (2) and the arm (6) so that when the plate (21) is ineffective, it pulls the arm (6) backwards, the rod (11) compresses the locking piston (13) and the projection (16) towards the rear so as to unfold the support leg (1). When the stop (17) comes against the stop (18) and stops the unfolding movement, the rod (11) pushes the then horizontal locking piston (13) outwards in rear so that its free end engages under the stop (18) and locks the support leg (1) in a vertical position.
Description
A Supporting Leg Arrangement on the Tow-bar of towed Agricultural Implements and the like.
The present invention relates to an arrangement for folding up and folding down a supporting leg on the tow-bar of towed agricultural implements. One embodiment of such an arrangement is already known from Swedish Patent 353-687, which shows and describes an arrangement wherein the shaft on a half-trailer cart or the like for attachment to the traction vehicle is equipped with a supporting prop which is mounted on the shaft and can be pivoted from a position in which it supports the shaft into an ineffective position under the effect of a lever rod, one end of which is designed to be acted on by the tractor and the other end of which pivots the supporting prop. The arrangement also comprises a device for locking the supporting prop in the folded-down position. The arrangement according to the Patent has obviously been beset with problems, since it has not become generally used.
The arrangement according to the present invention has the design and is endowed with the characteristics which can be found in the accompanying Patent Claims.
The invention is illustrated in the accompanying drawing, on which:
Figure 1 shows schematically a side view of an embodiment of a tow-bar with the supporting leg folded down, and
Figure 2 shows the same tow-bar with the supporting leg folded up.
At its free end a tow-bar 2 is equipped with a towing eye 3, and on its lower face it has a lug with a guide pin 15 on which the upper end of a supporting leg 1 is mounted pivotably. The supporting leg 1 is equipped at its upper end with a projection 16 which points backwards and along the tow-bar 2 when the supporting leg is folded down, this projection being equipped at the rear end of its upper edge with an abutment stop 17 pointing towards the rear. A sleeve 14 for a locking piston 13 is attached to the projection 16 adjacent to its free edge, in such a way that the locking piston 13 extends at right-angles to the supporting leg 1. The locking piston 13 is designed so that it may be moved between a terminal position wherein oneof its ends projects out of the sleeve 14 and beyond the rear edge of the projection 16. At its other end, which is permanently located outside the sleeve 14, it is connected via a pivot 12 to one end of a rod 11, the other end of which is connected via a pivot 10 to the free end of one arm 6 appertaining to a two-armed lever 6, 7 and which points upwards when the supporting leg 1 is folded up. The two-armed lever can be pivoted around a hinge 8 at the free end of the tow-bar 2. Its other arm 7 is equipped with a perpendicularly projecting plate 21 which is designed to rest against the towing eye 5 when the supporting
leg 1 is folded up, and which is equipped with a throughbore 9 which in this position corresponds with and is co-axial to the towing eye 3. A tensioning spring 20 is attached between the tow-bar 2 and the arm 6 so that it tries to pull the arm 6 backwards.
The arrangement functions in the following way:
When the supporting leg 1 is folded down (Figure 1) the arm 6 is pulled backwards so that the plate 21 points obliquely upwards relative to the towing eye 3. The rod 11 is thereby caused to push out the locking piston 13. The abutment stop 17 on the projection 16 rests on top of another abutment stop 18 which projects from a lug 19 on the lower face of the tow-bar 2, and the end of the locking piston 13 which is projecting out of the sleeve 14 is located on the lower face of the abutment stop 18 so that the supporting leg 1 is locked against pivoting both forwards and backwards.
When the towing eye 3 is to be connected to a towing hook 4 which can be raised and lowered, on a tractor or some other traction vehicle, the latter is reversed until the towing hook 4 comes centrally under the towing eye 3, after which the towing hook 4 is raised so that it engages in the towing eye 3 and lifts it, together with the tow-bar 2, so that the supporting leg 1 is lifted from the ground. In so doing, the point of the plate 21 comes immediately into contact with a contact surface 5 rigidly connected
to the tractor centrally above the towing hook 4. As lifting continues the plate 21 begins to be pressed downwards against the contact surface 5 and generally engages in a cut-out in it.
When the plate 21 is pressed downwards it pulls the arm 6 forwards. In so doing, it pulls the rod 11 with it. The first effect produced by this is that the locking piston 13 is pulled into the sleeve 14 until it reaches its inner terminal position. As lifting continues the rod 11, which must be connected to the arm 6 in such a way that in all positions it is located above the pin 15, pivots the supporting leg 1 up and back via the locking piston 13, the sleeve 14 and the projection 16 until it strikes against the abutment stop 18, at the same time as the plate comes to rest against the towing eye 3.
Claims
1. An arrangement for a supporting leg (1) on a tow-bar (2) on a towed agricultural implement, to fold up the supporting leg (1) when a towing eye (3) on the tow-bar (2) is attached round a towing hook (4) which can be raised and lowered, appertaining to a towing vehicle, and the towing hook (4) is raised relative to a fixed abutment surface (5) on the towing vehicle, and to fold down the supporting leg (1) when the towing hook (4) is lowered relative to the abutment surface (5), comprising a two-armed lever (6, 7) which can be pivoted around an axle pin (8) at the free end of the tow-bar (2) and one arm (7) of which bears a plate (21) which, in one terminal position corresponding to the folded-up supporting leg (1), rests against the towing eye (3) and, in another terminal position corresponding to the folded-down supporting leg (1), points obliquely up from the towing eye (3) and is designed to strike the abutment surface (5) when the towing hook (4) raises the towing eye (3), and to be brought thereby to rest against the towing eye (3), thus pivoting the lever (6, 7), characterised in that the lever arm (6) is hinged at its free end onto one end of a rod (11), the other end of which is hinged onto a locking piston (13) fitted in a sleeve (14) which is rigidly connected perpendicular to the supporting leg (1) on the free end of a backwards-pointing projection (16) projecting from that end of the supporting leg (1) which is connected by a hinge (15) to the tow-bar (2), this locking piston (13) being designed so that it may be displaced between one terminal position where the free end of the locking piston (13) projects from the sleeve (14) and another terminal position where the free end of the locking piston (13) is located flush with the edge of the sleeve (14), and that the tow-bar (2) is equipped on its lower face with a lug (19) with an abutment stop (18) projecting beyond the side of the tow-bar (2), the lower face of the abutment stop being designed to limit the folding-up movement of the supporting leg (1) and, when the supporting leg (1) is folded down, to rest against the end of the locking piston (13) which is projecting out of the sleeve (14) so that the supporting leg (1) is locked in its folded-down_/position, and that the projection (16) is equipped at its free end with an abutment stop (17) which is attached in such a way that when the supporting leg (1) is pivoted downwards and reaches its vertical position, the abutment stop (17) rests against the abutment stop (18) and limits the pivoting movement of the supporting leg (1) and, together with the locking piston (13), locks the supporting leg in a vertical position.
2. An arrangement according to Patent Claim 1, characterised in that the plate (21) is attached substantially at right-angles to the lever arm (6), and that its length is adapted so that the rod (11) is located above the pin (15) of the supporting leg (1) when the supporting leg is located in its vertical position.
3. An arrangement according to Patent Claim 1 or 2, characterised in that a tensioning spring (20) is fitted between the tow-bar (2) and the lever arm (6) in such a way that when the towing hook (4) is lowered, and with it also the towing eye (3), it causes the arm (6) to be pivoted backwards and to pivot the supporting leg (1) via the rod (11) towards the vertical position and, when this position has been reached, to push the locking piston out underneath the abutment stop (18).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8008416 | 1980-12-01 | ||
| SE8008416A SE424976B (en) | 1980-12-01 | 1980-12-01 | DEVICE FOR A FOOTSTRAP FOR A WRAP BAR FOR TOWED AGRICULTURAL EQUIPMENT AND SIMILAR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0073200A1 true EP0073200A1 (en) | 1983-03-09 |
Family
ID=20342369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81903206A Withdrawn EP0073200A1 (en) | 1980-12-01 | 1981-12-01 | A supporting leg arrangement on the tow-bar of towed agricultural implements and the like |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0073200A1 (en) |
| DK (1) | DK328982A (en) |
| NO (1) | NO822448L (en) |
| SE (1) | SE424976B (en) |
| WO (1) | WO1982001855A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501449A (en) * | 2021-07-30 | 2021-10-15 | 湖南三一中型起重机械有限公司 | Work machine and work machine leg assembly |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993024350A1 (en) * | 1992-05-27 | 1993-12-09 | John Broughton | Releasable locking apparatus |
| CN102887135B (en) * | 2012-10-31 | 2015-08-05 | 中国人民解放军总装备部军械技术研究所 | Mechanical type automatic supporting leg mechanism on small-sized caterpillar belt car |
| CN102923590A (en) * | 2012-11-17 | 2013-02-13 | 湖南大汉起重科技有限公司 | Space-saving vertical support oil cylinder foot |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE353687B (en) * | 1970-01-26 | 1973-02-12 | J Rikama | |
| NO130462C (en) * | 1972-04-11 | 1974-12-18 | Moelven Brug As | |
| FI47547B (en) * | 1972-11-02 | 1973-10-01 | B Aarre |
-
1980
- 1980-12-01 SE SE8008416A patent/SE424976B/en unknown
-
1981
- 1981-12-01 EP EP81903206A patent/EP0073200A1/en not_active Withdrawn
- 1981-12-01 WO PCT/SE1981/000349 patent/WO1982001855A1/en active Application Filing
-
1982
- 1982-07-15 NO NO822448A patent/NO822448L/en unknown
- 1982-07-22 DK DK328982A patent/DK328982A/en not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8201855A1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501449A (en) * | 2021-07-30 | 2021-10-15 | 湖南三一中型起重机械有限公司 | Work machine and work machine leg assembly |
| CN113501449B (en) * | 2021-07-30 | 2023-05-09 | 湖南三一中型起重机械有限公司 | Work machine and work machine leg assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8008416L (en) | 1982-06-02 |
| WO1982001855A1 (en) | 1982-06-10 |
| SE424976B (en) | 1982-08-23 |
| NO822448L (en) | 1982-07-15 |
| DK328982A (en) | 1982-07-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): FR |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19830613 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: EINARSSON, ULF |