FR2501621A1 - IMPROVEMENTS TO ENGINE SYSTEMS FOR VESSELS LIKELY TO SWITCH FROM THE HIGH SPEED MARKET TO THE REDUCED SPEED MARKET - Google Patents

Abstract

THE SYSTEM INCLUDES A CLUTCH 5 WHICH ALLOWS AN INPUT SHAFT 1 TO BE CONNECTED TO AN OUTPUT SHAFT 18. TO ALLOW TO SHIFT AT REDUCED SPEED, A PLANETARY MECHANISM 9 IS PROVIDED WITH THE CROWN 11 MAY BE BLOCKED BY A BRAKE 23. BY DEACTING THE CLUTCH 5 AND BRAKING THE CROWN, OPERATION CAN BE ENSURED BY AN AUXILIARY MOTOR COUPLED TO THE CENTRAL PINION OF THIS MECHANISM. Conversely, by releasing the crown and by activating the clutch, it is the main engine which intervenes by the shaft 1. a second clutch connected to the first by teeth 21, 22 and to which corresponds a second planetary mechanism allows walking BACK.

Description

2 5 0 1 6 21

  The subject of the invention is a motor system for a boat capable of changing from high speed to low speed operation, of the type which comprises for this purpose an input shaft, an output shaft, a clutch arranged in the kinematic link. provided between these trees, and a mechanism containing a set of planetaries, the planet carrier of which is integral with the secondary part or the driven part

of this clutch.

  In such a system, which is described for example in German patent application 29 13 375, the planetary mechanism comprises two sets, the rings of which are connected by a hydrodynamic control device. Thanks to this arrangement, an output pinion can be selectively driven from the engine, either directly through the clutch in the case of high speed walking, or, this clutch being put out of action (disengaged position), at through

  two sets of the planetary mechanism for walking at reduced speed.

  The invention aims to simplify this system and allow it to be produced in a less bulky form. According to the invention the central pinion of the sun gear set is connected to the primary part or driving part of the clutch and its crown can be blocked by a

brake.

  The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing: The single figure of this drawing represents schematically

a system according to the invention.

  The system in question comprises an input shaft 1 whose pinion 2 meshes with the external toothing 3 of the primary part (driving part) 4 of a clutch 5. The secondary part (driven part) 6 of this clutch 5 is connected by an intermediate shaft

  hollow with the planet carrier 7 of the planetary set 8 of a mechanical

  corresponding to me 9. The crown 10 of this mechanism can be blocked by a brake 11 relative to the casing 12 of the device. The central wheel 13 of the mechanism 8 is connected to the primary part 4 of the clutch by means of a connecting shaft 15 which passes through the hollow shaft 14 mentioned above. Between the clutch 5 and the planetary mechanism 9 the hollow shaft 14 carries a pinion 16 which meshes with a wheel 17 mounted on an output shaft 18 constituting the layer shaft

Of the boat.

  The system has been described above with reference to its branch

250 162 1

  or half shown on the right in the drawing. The part in question is used for example to ensure the advance. On the left side there is a similar part usable for reverse gear. We have provided the same references as on the right to designate the same parts. The clutch 5 of the right half has a second external toothing 21 which meshes with a corresponding external toothing 22 of the primary part 4 of the clutch 5 of the left half. For reasons of clarity of drawing, the teeth 21 and 22 have been shown at a certain distance from one another. When driving at high speed the clutch 5 located on the right half of the drawing is in action (that is to say in the engaged state). Thus the torque is transmitted to the output shaft 18 from the input shaft 1 via the clutch 5 and the output pinion 16. For reverse gear at high speed this clutch 5 on the right is put out of action (disengaged), while that on the left is on the contrary in service (engaged). So the torque is transmitted to the tree

  18 via the left half of said system.

  In the case of walking at reduced speed, the two clutches 5 must be put out of action while the brake Il of the planetary mechanism 9 on the right is applied for forward travel, or on the left.

for reverse gear.

  It should also be understood that the foregoing description

  has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the

  execution details described by all other equivalents.

R E V E ND I C A T I 0 N S

  1. Motor system for a boat, of the kind capable of passing from high speed to low speed operation and comprising for this purpose an input shaft (1), an output shaft (18), a clutch (5) arranged in the kinematic connection provided between these two shafts and a mechanism containing a set of planetaries (8) whose planet carrier (7) is integral with the secondary part or driven part (6) of this clutch (5), characterized in that that the central pinion (13) of the planet gear set (8) is connected to the primary part or driving part (4) of the clutch (5) and in that its crown (10) can be blocked by

a brake (11).

  2. System according to claim 1, characterized in that the and secondary part (6) of the clutch (5) 1st planet carrier (7) of the planetary mechanism are connected to each other by a hollow intermediate shaft (14) on which is mounted the pinion (16) for driving the output shaft (18), this pinion being disposed between the clutch (5) and the planetary mechanism (9), and in that the pinion central (13) of this mechanism is connected to the primary part (4) of the clutch (5) by

  a connecting shaft (15) which passes through the hollow shaft (14).

  3. System according to any one of claims 1 and 2,

  characterized in that to allow the reversal of the direction of travel, the input shaft (1) comprises a pinion (2), in that there is provided a second clutch (5) of which the secondary part (6) is kinematically connected to the output shaft (18), in that the primary parts (4) of these two clutches (5) are kinematically connected to each other, and in that the input pinion ( 2) is only connected to the primary part

  (4) of only one of the two clutches (5).

  4. System according to claim 3, characterized in that its part or branch which contains the second clutch (5) essentially comprises in the same way a planetary mechanism (9) such as that of the branch or part in which the first is located

clutch (5).