BE537871A

BE537871A -

Info

Publication number: BE537871A
Authority: BE
Priority date: 1954-04-23
Also published as: ES295728A3; BE528977A; FR67747E; FR1103775A

Description

       

  Le brevet principal a pour objet un appareil destiné à faire avancer des véhicules, tels que des berlines, le long d'une voie, par exemple une voie de service de mine.

  
Ce brevet décrit notamment un ravanceur de berlines assurant

  
le déplacement continu du train de berlines au moyen de deux chariots animés de mouvements alternatifs en sens inverse et munis de taquets agencés de façon à s'appuyer contre les essieux ou les caisses de berlines, lors de leur course d'avancement, et à s'effacer sous les berlines, lors de la course en sens inverse. L'avancement des chariots est provoqué par un mécanisme hydraulique comportant un piston associé à chacun des chariots, le retour de ces derniers étant assuré par un système de chaînes qui le.s réunit entre eux. Le mécanisme hydraulique comporte, en outre, un distributeur commandé par les chariots et qui fait agir le fluide sous pression alternativement sur les pistons.

  
Le présent brevet de perfectionnement a pour objet des perfectionnements au ravanceur de berlines qui vient d'être brièvement décrit.

  
L'un de ces perfectionnements consiste dans l'agencement de moyens hydrauliques destinés à assurer le rappel du piston qui a terminé

  
sa course d'avancement, sous l'effet du mouvement de l'autre piston. Il entraîne une simplification considérable de l'appareil en permettant la suppression du dispositif de chaînes qui, selon le brevet principal, reliait les chariots.

  
L'autre perfectionnement est relatif au mécanisme de commande du distributeur au moyen des chariots. 

  
La description qui va suivre en regard du dessin annexé, donné à-titre d'exemple non limitatif,fera bien comprendre comment l'invention peut être réalisée, les particularités qui ressortent tant du dessin que du texte faisant, bien entendu, partie de ladite invention.

  
La figure unique est une coupe horizontale schématique d'un ravanceur comportant les perfectionnements, objet de la présente addition.

  
Dans le mode de réalisation représenté sur le dessin, on reconnaît le bâti 1 du ravanceur qui porte les glissières) latérales 45 et 46 sur lesquelles se déplacement, respectivement, les chariots 47 et 48 porteurs de taquets escamotables 47a et 48a. Ces glissières et chariots sont agencés de la façon décrite dans le brevet principal.

  
Le chariot 47 est actionné par la tige 53a d'un pjston 53 se déplaçant dans le cylindre 55, tandis que le chariot 48 est actionné par la tige 54a du piston 54 mobile dans le cylindre 56. Un'distributeur 57 identique à celui qui a été décrit dans le brevet principal permet l'arrivée

  
de l'huile, alternativement aux deux cylindres, par les canaux qui n'ont pas été représentés.

  
Selon la présente addition, la cloison 72 qui sépare les cylindres 55 et 56 est percée d'une lumière 73 disposée à l'extrémité avant de ladite cloison, lumière qui assure la communication entre les deux cylindres.

  
 <EMI ID=1.1> 

  
tissant à un canal de fuite 76 qui retourne au réservoir d'huile non représenté.

  
En outre, un petit trou compensateur 77 est prévu un peu en arrière du point où l'un ou l'autre des pistons atteint son point mort extérieur.

  
Aux chariots 47 et 48 est associé un mécanisme destiné à commander les leviers en équerre 67 et 68 assurant le fonctionnement du distributeur



  The main patent relates to an apparatus for advancing vehicles, such as sedans, along a track, for example a mine service track.

  
This patent describes in particular a sedan ravancer ensuring

  
the continuous movement of the train of sedans by means of two carriages with reciprocating movements in opposite directions and provided with cleats arranged so as to rest against the axles or the bodies of sedans, during their forward stroke, and to s 'clear under sedans, when running in reverse. The advance of the carriages is caused by a hydraulic mechanism comprising a piston associated with each of the carriages, the return of the latter being ensured by a system of chains which unites them. The hydraulic mechanism also comprises a distributor controlled by the carriages and which causes the pressurized fluid to act alternately on the pistons.

  
The object of the present improvement patent is to improve the sedan ravancer which has just been briefly described.

  
One of these improvements consists in the arrangement of hydraulic means intended to ensure the return of the piston which has finished

  
its forward stroke, under the effect of the movement of the other piston. It leads to a considerable simplification of the apparatus by allowing the elimination of the device of chains which, according to the main patent, connected the carriages.

  
The other improvement relates to the control mechanism of the dispenser by means of the carriages.

  
The description which will follow with regard to the appended drawing, given by way of non-limiting example, will make it clear how the invention can be implemented, the particularities which emerge both from the drawing and from the text forming, of course, part of said invention.

  
The single figure is a schematic horizontal section of a ravancer including the improvements, subject of the present addition.

  
In the embodiment shown in the drawing, we recognize the frame 1 of the ravancer which carries the side slides 45 and 46 on which move, respectively, the carriages 47 and 48 carrying retractable cleats 47a and 48a. These slides and carriages are arranged as described in the main patent.

  
The carriage 47 is actuated by the rod 53a of a pjston 53 moving in the cylinder 55, while the carriage 48 is actuated by the rod 54a of the piston 54 movable in the cylinder 56. A distributor 57 identical to that which has been described in the main patent allows the arrival

  
oil, alternately to the two cylinders, through the channels which have not been shown.

  
According to the present addition, the partition 72 which separates the cylinders 55 and 56 is pierced with a slot 73 disposed at the front end of said partition, which slot ensures communication between the two cylinders.

  
 <EMI ID = 1.1>

  
weaving to a leakage channel 76 which returns to the oil tank not shown.

  
In addition, a small compensating hole 77 is provided a little behind the point where one or the other of the pistons reaches its outer dead center.

  
With the carriages 47 and 48 is associated a mechanism intended to control the angled levers 67 and 68 ensuring the operation of the dispenser.

Claims

67 via the rod 66. This mechanism comprises a rod 47b sliding along the slide 47 and a similar rod 48b sliding along the slide 46. Between the two rods 47b and 48b is mounted a connecting rod 78 carried by said rods Each of the carriages carries to <EMI ID = 2.1>

the front a stop 53b or 54b.

When the two pistons have reached the full stroke, for example, the piston 54 at the rear end of the stroke and the piston 53 at the front end of the stroke, the connecting rod 78 is brought into the position shown in the drawing by the combined action of the stop 54b and the heel 47c, position in which the rod 48b acts on 1 & lever 68 of the distributor. If it is the piston 54 which is at the full forward stroke and the piston 53 which occupies the rear dead center, the position of the connecting rod 78 is symmetrical to the previous one and the rod 47b then acts on the lever 67.

'The operation of the ravancer is as follows;

Cylinders 55 and 56 are completely filled with oil.

Assuming that the piston 54 occupies the inner dead center, the rod 48b has pivoted the lever 68 and the distributor directs the pressurized oil onto the piston 54. The latter moves forward driving the carriage 48 which, by its cleat 48a, moves the train of sedans forward.

In time, oil is returned by the canal. 73 on

47 correspondent. This movement continues until the pistons have reached their respective dead centers, front or rear.

The valve 75 prevents the pressure from getting too high at the front of the cylinder 56. When in operation, the escaping oil passes through the leakage channel 76. The corresponding loss of oil is compensated by a loss of oil.

The piston 54 advances while the piston 53 moves back. If we assume

the connecting rod 78 is slightly pushed backwards but not sufficiently

which acts as a pivot that the control of the lever 67 will be effective.

If, on the other hand, it is the heel 480 which is the first to come into contact with the connecting rod 78, the latter will be displaced forwards and., There not

around the heel 48c. In either case, the reversal only occurs when the pistons are effectively at full stroke.

After this inversion, the piston 53 is subjected to oil pressure. The operation of the device continues symmetrically to

to the apparatus which has just been described, in particular by substitution of equivalent technical means, without for this falling within the scope of the present invention.

<EMI ID = 9.1> 2) - Sedan ravancer according to claim 1, characterized in that the cylinders in which move the pisonts associated with the carriages are -totally filled with oil, a channel communicating the two cylinders to their part before.

3) - Sedan ravancer according to claim 2, characterized in that the channel communicating the two cylinders communicates with a leakage channel, via a safety valve.

4) - Sedan ravancer aëlon one of claims 2 and 3, characterized in that behind the portion of the cylinders that the pistons occupy when they are in front neutral is provided a small orifice connecting the two cylinders and intended to compensate for the oil escaping through the leakage channel.

5) Sedan ravancer according to one of the preceding claims

tooth the distributor at the rear end of travel slide along the slideways and are joined by a connecting rod, stops being associated with the carriages to enable them to act on said connecting rod at the end of the travel.

6) Sedan ravancer according to claim 5, characterized

in that each carriage has a stopper or heel at the rear and each

born by the combined action of the heel of one carriage and the stop of the piston rod of the other carriage.