FR2535934A1 - Automatic locking hitching hook - Google Patents

Automatic locking hitching hook Download PDF

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Publication number
FR2535934A1
FR2535934A1 FR8219055A FR8219055A FR2535934A1 FR 2535934 A1 FR2535934 A1 FR 2535934A1 FR 8219055 A FR8219055 A FR 8219055A FR 8219055 A FR8219055 A FR 8219055A FR 2535934 A1 FR2535934 A1 FR 2535934A1
Authority
FR
France
Prior art keywords
linkage
housing
lock
hook
axis
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.)
Granted
Application number
FR8219055A
Other languages
French (fr)
Other versions
FR2535934B1 (en
Inventor
Gerard Aoustin
Jean-Serge Bruneteaud
Gerard Oger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUARD UCF
Original Assignee
HUARD UCF
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 HUARD UCF filed Critical HUARD UCF
Priority to FR8219055A priority Critical patent/FR2535934A1/en
Publication of FR2535934A1 publication Critical patent/FR2535934A1/en
Application granted granted Critical
Publication of FR2535934B1 publication Critical patent/FR2535934B1/fr
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60DVEHICLE CONNECTIONS
    • B60D1/00Traction couplings; Hitches; Draw-gear; Towing devices
    • B60D1/01Traction couplings or hitches characterised by their type
    • B60D1/04Hook or hook-and-hasp couplings
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01BSOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B59/00Devices specially adapted for connection between animals or tractors and agricultural machines or implements
    • A01B59/002Details, component parts
    • A01B59/006Latched hooks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B45/00Hooks; Eyes
    • F16B45/02Hooks with pivoting or elastically bending closing member
    • F16B45/021Hooks with pivoting or elastically bending closing member the closing member being operable remotely, e.g. by cables, chains or rods

Abstract

Automatic locking hitching hook disposed at the end of a three-point hitch rod of a tractor comprising a housing in which the hitching bar of a tractor is placed, this housing being closed by a moving bolt controlled for opening by a linkage operated by the tractor driver and brought into the closed position by a spring. The bolt 6 comprises a slot in the shape of an arc of circle 8 traversed by two spindles 11 and 12, one of the spindles 11 lodging in a notch 9 of the slot 8 in order to hold it in the open position, the other spindle 12 lodging in a housing 10 of the slot 8 in order to hold it locked in the closed position.

Description

La présente invention a pour objet un crochet d'attelage à verrouillage automatique plus particulièrement destine à être disposé à l'extrémité arrière des bielles d'attelage à trois points d'un tracteur agricole. The present invention relates to an automatically locking coupling hook intended more particularly to be arranged at the rear end of the three-point coupling rods of an agricultural tractor.

Il est connu, en particulier par le brevet 1.530.160 au nom de Fendt, de disposer à l'extrémité arrière d'une bielle d'attelage un crochet dont le logement est fermée par un verrou mobile dont l'ouverture est commandée par une tringlerie actionnée par le conducteur du recteur redit verrou étant ramené en position de fermeture par un ressort
La présente invention a pour objet un perfectionnement consistant à munir un tel crochet d'attelage de moyens permettant d'en immobiliser le verrou en position ouverte, le verrouillage en position fermee se produisant automatiquement.
It is known, in particular from patent 1,530,160 in the name of Fendt, to have at the rear end of a coupling rod a hook whose housing is closed by a movable lock whose opening is controlled by a linkage actuated by the driver of the rector redit lock being brought back into the closed position by a spring
The present invention relates to an improvement consisting in providing such a coupling hook with means making it possible to immobilize the lock in the open position, the locking in the closed position occurring automatically.

A titre d'exemple non limitatif et pour faciliter la comprehension de l'invention9 on a représenté aux dessins annexés
Figure 1 une vue en coupe partielle d'un crochet en position verrouillée ;
Figure 2 une vue en coupe partielle du dispositif de la figure 1 en position déverrouillée ;
Figure 3 une vue en coupe d'un dispositif analogue à celui des figures 1 et 2 disposé en bout de la bielledu 3ème point de l'attelage d'un tracteur agricole.
By way of nonlimiting example and to facilitate understanding of the invention9, the accompanying drawings have been shown.
Figure 1 a partial sectional view of a hook in the locked position;
Figure 2 a partial sectional view of the device of Figure 1 in the unlocked position;
Figure 3 a sectional view of a device similar to that of Figures 1 and 2 disposed at the end of the connecting rod of the 3rd point of the hitch of an agricultural tractor.

Les figures 1 et 2 représentent un crochet 2 place en bout d'une bielle inférieure d'attelage 1 d'un tracteur agricole non représenté. Ce crochet comporte un logement semi-circulaire 3 destiné à recevoir la barre d'attelage 4 d'un outil agricole quelconque. Ce logement 3 est fermé par un verrou mobile 6 qui vient se placer au-dessus 4e la barre 4 lorsque cette dernière est mise en place dans dans le logement 3 afin de lly maintenir.Ce verrou 6 se déplace dans un évidement 5 ménagé dans la masse du crochet 2. Il est légèrement incurvé vers le haut et comporte uae rainure en arc de cercle, ladite rainure comportant a Sa paroi supérieure un cran 9 et un logement 10 ; le cran 9 est situe à l'avant de la rainure 8 et le cran 10 à l'arrière.  Figures 1 and 2 show a hook 2 placed at the end of a lower link rod 1 of an agricultural tractor not shown. This hook comprises a semi-circular housing 3 intended to receive the drawbar 4 of any agricultural implement. This housing 3 is closed by a movable lock 6 which is placed above the 4th bar 4 when the latter is placed in in the housing 3 in order to maintain it. This lock 6 moves in a recess 5 formed in the mass of the hook 2. It is slightly curved upwards and has a groove in an arc, said groove having at its upper wall a notch 9 and a housing 10; the notch 9 is located at the front of the groove 8 and the notch 10 at the rear.

Cette rainure est traversée par deux axes 11 et 12 qui traversent de part en part l'évidement 5 dans lequel se déplace le verrou 6. Le verrou 6 comporte à sa partie avant qui fait saillie hors de l'évidement deux rampes 7 et 7a.This groove is crossed by two axes 11 and 12 which pass right through the recess 5 in which the latch 6 moves. The latch 6 has at its front part which projects out of the recess two ramps 7 and 7a.

A son extrémité arrière, le verrou 6 est relie à unetringlerie de commande 14 qui traverse la paroi supérieure de l'évidement 5 par un orifice 15. En outre, le verrou 6 est sollicité vers le bas, dans une direction opposée à celle de la tringlerie 14 par un ressort 13 qui est fixe d'une part au voisinage du fond de l'évidement 5 et d'autre part au verrou 6 en un point situé à l'intérieur du verrou par rapport au point de fixation de la tringlerie 14
En position verrouillée, qui est celle représentée à la figure 1, sous l'action du ressort 13, l'axe 12 pénètre dans le logement 10 de la rainure 8 du verrou 6 et celuici est donc verrouillé en position fermée. La barre 4 est donc maintenue dans le logement 3 quelles que soient les sollicitations qu'elle subit.
At its rear end, the latch 6 is connected to a control linkage 14 which passes through the upper wall of the recess 5 through an orifice 15. In addition, the latch 6 is biased downward, in a direction opposite to that of the linkage 14 by a spring 13 which is fixed on the one hand in the vicinity of the bottom of the recess 5 and on the other hand to the lock 6 at a point located inside the lock relative to the point of attachment of the linkage 14
In the locked position, which is that shown in FIG. 1, under the action of the spring 13, the axis 12 enters the housing 10 of the groove 8 of the lock 6 and this is therefore locked in the closed position. The bar 4 is therefore maintained in the housing 3 whatever the stresses it undergoes.

Pour dételer la barre d'attelage 4, on effectue une traction sur la tringlerie 14 comme indiqué par la flèche f sur la figure 2. Le verrou 6 en prenant appui sur l'axe Il pivote vers le haut, ce qui fait que l'axe 12 sort du logement 1Q ce qui déverrouille le verrou 6 qui coulisse vers l'carrière Les tractions exercées en directions opposées par la tringlerie 14 et le ressort 13 maintiennent la rainure 8 enapnul contre l'axe 11 jusqu'à ce que celui-ci pèttètre dans le cran 9. On peut alors relâcher la traction sur la tringlerie: le verrou est maintenu en position ouverte par appui de l'axe 11 dans le cran 9. To unhitch the drawbar 4, pull on the linkage 14 as indicated by the arrow f in Figure 2. The lock 6 by resting on the axis It pivots upwards, so that the axis 12 comes out of the housing 1Q which unlocks the bolt 6 which slides towards the quarry The pulls exerted in opposite directions by the linkage 14 and the spring 13 hold the groove 8 in apnoid against the axis 11 until the latter peter in the notch 9. We can then release the traction on the linkage: the lock is held in the open position by pressing the pin 11 in the notch 9.

Dans cette position,I'extrémité du verrou 6 fait légèrement saillie au-dessus du logement 3 ; de telle sorte que,lorsque l'on va sortir la barre d'attelage 4 du logement 3, comme représenté à la figure 2, ladite barre 4 va venir appuyer contre la rampe 7a et faire reculer légèrement le verrou 6 en le soulevant, ce qui dégage l'axe 11 du cran 9, Ainsi lorsque la barre 4 est complètement sortie du logement 3, le verrou, sous l'effet du ressort 13 va ressortir complètement et reprendre sa position d'origine de verrouillage, l'axe 12 etant dans le logement 10,
Pour remettre la barre 4 en position, il suffit de la présenter aucdessus du logement 3 et de l'abaisser (ou de soulever la bielle d'attelage 1), La barre 4 fait alors appui sur la rampe 7 et fait reculer le verrou 6. Mais celui-ci ne se verrouille pas en position ouverte parce que, pour qu'il en soit ainsi, il faut qu'il y ait l'action simultanée de la tringlerie 14 et du ressort 13, ce qui imprime au verrou un couple qui le maintient en appui contre l'axe 11. En conséquence, le verrou 6 revient à sa position d'origine après passage de la barre 4 qui se trouve ainsi au.tomatiquement verrouillé en position.
In this position, the end of the latch 6 protrudes slightly above the housing 3; so that, when the coupling bar 4 is removed from the housing 3, as shown in FIG. 2, said bar 4 will come to press against the ramp 7a and cause the bolt 6 to move back slightly by lifting it, this which releases the axis 11 from the notch 9, So when the bar 4 is completely out of the housing 3, the lock, under the effect of the spring 13 will come out completely and resume its original locking position, the axis 12 being in housing 10,
To return the bar 4 to its position, it suffices to present it above the housing 3 and to lower it (or to raise the link rod 1). The bar 4 then presses on the ramp 7 and moves the lock 6 back. But it does not lock in the open position because, for it to be so, there must be the simultaneous action of the linkage 14 and the spring 13, which gives the lock a couple which keeps it in abutment against the axis 11. Consequently, the latch 6 returns to its original position after passage of the bar 4 which is thus au.tomatiquement locked in position.

La figure 3 représente la même disposition destinez à la bielle du troisième point la de l'attelage à trois points. Le crochet 2a comporte un logement sphérique 3a destiné à recevoir la rotule 16. Le verrou 6a est pratiquement identique au verrou 6 et comporte de la même maniere un cran 9a dans lequel vient se loger l'axe 11a, un logement 10a pour l'axe 12a, un ressort 13a et une tringlerie de commande 14a.  Figure 3 shows the same arrangement for the connecting rod of the third point of the three-point hitch. The hook 2a comprises a spherical housing 3a intended to receive the ball joint 16. The latch 6a is practically identical to the latch 6 and likewise comprises a notch 9a in which is housed the axis 11a, a housing 10a for the axis 12a, a spring 13a and a control linkage 14a.

Claims (4)

REVENDICATIONS 1. Crochet d'attelage à verrouillage automatique disposé en bout de bielle d'a-ttelage à trois points d'un tracteur comportant un logement dans lequel vient se placer la barre d'attelage d'un tracteur, ce logement étant fermé par un verrou mobile commandé pour l'ouver ture par une tringlerie actionnée par le conducteur du tracteur et ramené en position de fermeture par un ressort, caractérisé par le fait que ledit verrou (6) comporte une rainure en arc de cercle (8) traversée par deux axes (11 et 12) l'un des axes (11) venant se loger dans un cran (9) de la rainure (8) pour le maintenir en position d'ouverture, l'autre axe (12) venant se placer dans un logement (10) e la rainure (8) pour le maintenir verrouillé en position de fermeture. 1. Self-locking towing hook placed at the end of a three-point linkage rod of a tractor comprising a housing in which the drawbar of a tractor is placed, this housing being closed by a movable lock controlled for opening by a linkage actuated by the tractor driver and brought back into the closed position by a spring, characterized in that said lock (6) comprises a groove in an arc of a circle (8) crossed by two axes (11 and 12) one of the axes (11) being received in a notch (9) of the groove (8) to keep it in the open position, the other axis (12) coming to be placed in a housing (10) e the groove (8) to keep it locked in the closed position. 2. Crochet selon la revendication 1, dans lequel le verrou- (6) est sollicité en position de fermeture par un ressort (13) et est commandé vers 1 'ouverture par une tringlerie (14) les points d'application du ressort (13) et de Ta tringlerie (14) étant tels qu'ils impriment au verrou: (6) un couple de rotation qui, lorsque Te verrou (6) est tire par la tringlerie (14), maintient la aroi de la rainure (8) contre l'axe ( jusqu'à ce que cet axe pénètre dans Te cran (9). 2. Hook according to claim 1, wherein the lock (6) is biased in the closed position by a spring (13) and is controlled towards the opening by a linkage (14) the points of application of the spring (13 ) and of the linkage (14) being such that they print on the lock: (6) a torque which, when the lock (6) is pulled by the linkage (14), maintains the groove of the groove (8) against the axis (until this axis enters Te notch (9). 3. Crochet selon la revendication 2, dans lequel la tringlerie (14) est placée à l'extrémité arrière du verrou (6) de sorte que lorsqu'une traction est exercée sur le verrou (6) par ladite tringlerie (14) ladite extrémité arriere se soulève en dégageant l'axe (12) du logement de verrouillage (10). 3. Hook according to claim 2, wherein the linkage (14) is placed at the rear end of the latch (6) so that when traction is exerted on the latch (6) by said linkage (14) said end rear is lifted by releasing the pin (12) from the locking housing (10). 4. Crochet selon la revendication 3, dans lequel le verrou (6) comporte à son autre extrémité deux rampes inverses (7 et 7a) de sorte que lors de son introduction dans Te- crochet, la barre (4) repousse par la rampe (7) le verrou (6) qui après son passage reprend sa position d'origine fermée et verrouillée et que, lors de son extraction, du crochet 2, le verrou (6) ayant été au préalable ouvert par la tringlerie (14) et étant maintenu dans cette position par le cran (9) et l'axe (11), ladite barre (4) repousse, par la rampe (7a) ledit verrou (6) qui se libere de l'axe (11) et revient en position fermée et verrouillée apres passage de la barre (4).  4. Hook according to claim 3, wherein the latch (6) has at its other end two reverse ramps (7 and 7a) so that when it is introduced into Te-hook, the bar (4) pushes back by the ramp ( 7) the bolt (6) which after its passage returns to its original closed and locked position and which, when it is extracted, from the hook 2, the bolt (6) having been previously opened by the linkage (14) and being maintained in this position by the notch (9) and the axis (11), said bar (4) pushes back, by the ramp (7a), said latch (6) which is released from the axis (11) and returns to position closed and locked after passage of the bar (4).
FR8219055A 1982-11-15 1982-11-15 Automatic locking hitching hook Granted FR2535934A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8219055A FR2535934A1 (en) 1982-11-15 1982-11-15 Automatic locking hitching hook

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8219055A FR2535934A1 (en) 1982-11-15 1982-11-15 Automatic locking hitching hook

Publications (2)

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FR2535934A1 true FR2535934A1 (en) 1984-05-18
FR2535934B1 FR2535934B1 (en) 1985-04-19

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555398A1 (en) * 1983-11-24 1985-05-31 Huard Ucf Automatic coupling hooks intended to be placed at the ends of three-point coupling connecting rods
FR2582766A1 (en) * 1985-05-31 1986-12-05 Galibert Alain Lightweight snap shackle with opening via electric contact
US5050684A (en) * 1989-04-15 1991-09-24 Jean Walterscheid Gmbh Coupling hook
FR2676786A1 (en) * 1991-05-22 1992-11-27 Seror Alain Assembly device for tubes
EP0523332A1 (en) * 1991-07-10 1993-01-20 C.B.M. S.p.A. Automatic locking and release mechanism for three-point hitches
FR2697207A1 (en) * 1992-10-23 1994-04-29 Walterscheid Gmbh Gkn Hitch hook for the lower arm of a tractor three-point hitch.
FR2705064A1 (en) * 1993-05-12 1994-11-18 Walterscheid Gmbh Gkn Coupling hook for the lower arms of a tractor three-point hitch.
WO2000010376A1 (en) * 1998-08-21 2000-03-02 Paavo Viikki Coupling hook particularly for the lower arms of a three-point linkage of a tractor
GB2417521A (en) * 2004-08-27 2006-03-01 Jack Ivan Braten Hook having spring biased locking dog and pulling element
ITBO20090583A1 (en) * 2009-09-15 2011-03-16 Cbm Spa PAIR OF HOOKS FOR THREE POINTS ATTACK

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR352458A (en) * 1905-03-17 1905-08-11 Alfred Paris Safety strap hook
DE1265472B (en) * 1967-03-03 1968-04-04 Eberhard Geb Locking device for a quick coupling to connect a tractor to a work device
FR2347865A2 (en) * 1975-03-11 1977-11-10 Walterscheid Gmbh Jean IMPROVEMENT OF HITCH HOOKS ESPECIALLY FOR THE THREE POINT LINKAGE OF A TRACTOR
FR2444396A1 (en) * 1978-12-22 1980-07-18 Herriau Sa Farm tractor lifting arm automatic hitch - has spring attached to component sliding in guide in rotary catch
DE3033663A1 (en) * 1980-09-06 1982-03-18 Jean Walterscheid Gmbh, 5204 Lohmar Coupling hook for tractor hitch - has cable operated swinging plate controlling release finger, swung between open and closed positions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR352458A (en) * 1905-03-17 1905-08-11 Alfred Paris Safety strap hook
DE1265472B (en) * 1967-03-03 1968-04-04 Eberhard Geb Locking device for a quick coupling to connect a tractor to a work device
FR2347865A2 (en) * 1975-03-11 1977-11-10 Walterscheid Gmbh Jean IMPROVEMENT OF HITCH HOOKS ESPECIALLY FOR THE THREE POINT LINKAGE OF A TRACTOR
FR2444396A1 (en) * 1978-12-22 1980-07-18 Herriau Sa Farm tractor lifting arm automatic hitch - has spring attached to component sliding in guide in rotary catch
DE3033663A1 (en) * 1980-09-06 1982-03-18 Jean Walterscheid Gmbh, 5204 Lohmar Coupling hook for tractor hitch - has cable operated swinging plate controlling release finger, swung between open and closed positions

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555398A1 (en) * 1983-11-24 1985-05-31 Huard Ucf Automatic coupling hooks intended to be placed at the ends of three-point coupling connecting rods
FR2582766A1 (en) * 1985-05-31 1986-12-05 Galibert Alain Lightweight snap shackle with opening via electric contact
US5050684A (en) * 1989-04-15 1991-09-24 Jean Walterscheid Gmbh Coupling hook
FR2676786A1 (en) * 1991-05-22 1992-11-27 Seror Alain Assembly device for tubes
EP0523332A1 (en) * 1991-07-10 1993-01-20 C.B.M. S.p.A. Automatic locking and release mechanism for three-point hitches
FR2697207A1 (en) * 1992-10-23 1994-04-29 Walterscheid Gmbh Gkn Hitch hook for the lower arm of a tractor three-point hitch.
FR2705064A1 (en) * 1993-05-12 1994-11-18 Walterscheid Gmbh Gkn Coupling hook for the lower arms of a tractor three-point hitch.
ES2112707A1 (en) * 1993-05-12 1998-04-01 Walterscheid Gmbh Gkn Coupling hook for the lower steering arms of a three-point attaching device of a tractor
WO2000010376A1 (en) * 1998-08-21 2000-03-02 Paavo Viikki Coupling hook particularly for the lower arms of a three-point linkage of a tractor
GB2417521A (en) * 2004-08-27 2006-03-01 Jack Ivan Braten Hook having spring biased locking dog and pulling element
ITBO20090583A1 (en) * 2009-09-15 2011-03-16 Cbm Spa PAIR OF HOOKS FOR THREE POINTS ATTACK
EP2324691A3 (en) * 2009-09-15 2012-11-14 CBM S.p.A. Pair of hooks for three-point coupling

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