JPH0538435U - Support device for planetary gear unit - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to easily and easily support a planetary gear device. [Structure] A propulsion shaft system 6 connecting an output source 1 and a propulsion device 3 is provided separately from a fixed system such as a double bottom 25 of a hull 10 and transmits power to the propulsion device 3 by decelerating or reversing it. In the planetary gear unit 19 for
Brackets 31 and 32 are extended to the left and right from the above, and the front end portions of the brackets 31 and 32 and the fixed system are connected by double-acting hydraulic rams 33 and 34, so that the upper and lower sides formed on one hydraulic ram 33. It is characterized in that the pair of oil chambers 44, 45 and the pair of upper and lower oil chambers 46, 48 formed in the other hydraulic ram 34 are alternately connected by hydraulic pipes 47, 49.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support device for a planetary gear device, and more particularly to a support device for a planetary gear device for easily and easily supporting the planetary gear device.

[0002]

[Prior Art]

 When the propeller as a propeller is rotationally driven by the power obtained from the engine of the output source to generate propulsive force, a thrust load is generated in the propulsion shaft system that connects the engine and the propeller. This thrust load is received by the planetary gear unit or the engine when a planetary gear unit that reduces or reverses the power is adopted for the propulsion shaft system. For this reason, in a ship in which the planetary gear device is installed on the bottom of the ship, the planetary gear device must be upsized and increased in weight.

In order to avoid this, the applicant of the present invention has previously proposed a "power transmission device supporting device" in Japanese Patent Application No. 62-144413. In this proposal, the thrust load generated in the propulsion shaft system is received by the stern of the hull, and the planetary gear unit provided in the propulsion shaft system is floatingly supported. That is, as shown in FIG. 4, the pedestals 73 and 74 are installed so as to stand up from the double bottom 72 on both sides of the planetary gear unit 71 provided on the propulsion shaft system 70, and extend from the planetary gear unit 71. Single-acting hydraulic rams 77, 78, 79, 80 are provided between the front ends of the brackets 75, 76 and the pedestals 73, 74 for supporting the anti-motion generated in the planetary gear unit 71 during power transmission. There is. The hydraulic ram 77 and the hydraulic ram 80 are connected by the hydraulic pipe 81, and the hydraulic ram 78 and the hydraulic ram 79 are connected by the hydraulic pipe 82. Therefore, the counterclockwise rotation generated in the planetary gear device 19 at the time of power transmission. The moment is canceled by the hydraulic rams 77 and 80, and the counterclockwise anti-moment is canceled by the hydraulic rams 78 and 79.

[0004]

[Problems to be solved by the device]

 By the way, since the hydraulic rams 77 to 80 are attached to the mounts 73 and 74, the reaction moment generated in the planetary gear train 71 is substantially received by the mounts 73 and 74. Since a large force acts on the pedestals 73 and 74 that support the anti-moment of the planetary gear unit 71, the pedestal becomes large in size and weight.

On the other hand, since the planetary gear device 71 is arranged in a place near the propulsion device in the hull, in order to reduce the hull resistance and improve the propulsion performance, the hull portion close to the propulsion device should be as thin as possible. It is desirable to do. Therefore, since the mounts 73 and 74 are installed, there is a problem that the ship width must be widened to secure the installation space.

The present invention was devised to effectively solve the above problems.

An object of the present invention is to provide a support device for a planetary gear device that can easily and easily support the planetary gear device.

[0008]

[Means for Solving the Problems]

 A planetary gear device that is provided on the propulsion shaft system that connects the output source and the propulsion device, separated from the fixed system such as the double bottom of the hull, and transmits or decelerates the power to the propulsion device. A bracket is extended from the gear unit to the left and right sides, and the tip of the bracket is connected to the fixed system with a double-acting hydraulic ram, and a pair of upper and lower oil chambers formed in one hydraulic ram and the other hydraulic A pair of upper and lower oil chambers formed on the ram are alternately connected by hydraulic piping.

[0009]

[Action]

 Since the reaction moment generated in the planetary gear device is supported by the double-acting hydraulic ram in this way, the hydraulic ram can be reduced, and the pedestal is not required, so that the supporting device can be simplified.

[0010]

Embodiment An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 3, an engine 2 which is an output source 1 and propellers 4 and 5 which are propulsion devices 3 are connected to each other via a propulsion shaft system 6, and the propulsion shaft system 6 is connected to an input side. It has a positioned input shaft 7 and a counter-rotating shaft 8 serving as a propeller shaft positioned on the output side. The counter-rotating shaft 8 is composed of an inner shaft 11 which is inserted into a stern portion 10 of a hull 9 and rotates in mutually opposite directions, and a cylindrical outer shaft 12 which covers the inner shaft 11. The stern side propeller 4 is attached to the inner shaft 11, and the bow side propeller 5 is attached to the outer shaft 12.

In order to receive the thrust load generated on the bow side propeller 5, thrust bearings 13 and 14 are provided in the bow side propeller boss 15, and these thrust bearings 13 and 14 sandwich the collar 16 so as to face each other. It is provided. Therefore, the thrust load generated on the bow side propeller 5 is transmitted to the inner shaft 11 via the thrust bearings 13 and 14 and the collar 16, and can be received by the engine 2 together with the thrust load generated on the stern side propeller 4. ing. In addition to these thrust bearings 13 and 14, the propulsion shaft system 6 is supported by bearings 17 and 18, etc.

A planetary gear unit 19 is provided on the propulsion shaft system 6. The planetary gear unit 19 decelerates and transmits the power of the output source 1 to the contra-rotating shaft 8, and also the inner shaft 11 and the outer shaft 12 thereof. The power is distributed equally to the two. The planetary gear device 19 has a gear train including a sun gear 21, a planetary gear 22, and an internal gear 23 in a casing 20, and the weight of the entire planetary gear device is supported by the inner shaft 11. That is, the planetary gear unit 19 is floatingly supported above a fixed system such as the double bottom 25 of the hull 9.

In particular, in order to support the reaction moment generated in the planetary gear device 19 during power transmission, as shown in FIG. 1, brackets 31 and 32 are extended from the planetary gear device 19 to the left and right sides, and the brackets 31 and 32 are extended. The tip of 32 and the double bottom 25 are connected by double-acting hydraulic rams 33 and 34. Since the two hydraulic rams 33 and 34 have the same configuration, the one hydraulic ram 33 will be described.

As shown in FIG. 2, the hydraulic ram 33 has a cylinder portion 36 rotatably connected to the tip of the bracket 31 via a pin 35, and supplies and discharges oil in the cylinder portion 36. It has a piston 37 that moves accordingly. An upper rod portion 38 and a lower rod portion 39 are integrally formed vertically on the piston 37 so that the upper rod 38 is vertically guided by a guide portion 41 formed on the cylinder portion 36. A lower end portion of the lower rod portion 39 is rotatably connected to a support portion 42 exposed below the cylinder portion 36 and protruding from the double bottom 25 via a pin 43. A gap 41a is formed in the upper part of the guide portion 41 to allow the vertical movement of the piston 37 by a required amount.

Further, an upper oil chamber 44 and a lower oil chamber 45 are formed on both sides of the piston 37 in the cylinder portion 36, and as shown in FIGS. 1 and 2, the upper oil chamber 44 has the other hydraulic chamber 34. The lower oil chamber 46 is connected to each other by a hydraulic pipe 47, and the lower oil chamber 45 is connected to an upper oil chamber 48 of the other hydraulic ram 34 by a hydraulic pipe 49. That is, the oil chambers 44 and 45 of the one hydraulic ram 33 and the oil chambers 46 and 48 of the other hydraulic ram 34 are alternately connected by the hydraulic pipes 47 and 49. These hydraulic pipes 47, 49 are connected with pressure gauges 51, 52 for displaying oil pressure, oil supply sources 55, 56 via check valves 53, 54, and check valves via orifices 57, 58. 61 and 62 are connected.

Next, the operation of the above embodiment will be described.

As shown in FIG. 1, when the power is transmitted from the output source 1 to the propulsion device 3, a reaction moment is generated in the planetary gear device 19. As shown in FIG. 1, if this anti-moment occurs in the planetary gear device 19 in the clockwise direction (forward movement), this anti-moment is connected to the upper oil chamber 44 of one hydraulic ram 33 and to this. And the lower oil chamber 46 of the other hydraulic ram 34. Since these oil chambers 44 and 46 are connected to each other in a closed circuit, a reaction force that cancels a clockwise counter moment is generated. Since the hydraulic rams 33 and 34 are connected to the double bottom 25, substantially the reaction force generated in the planetary gear unit 19 is directly received by the double bottom 25.

Similarly, a counterclockwise counter-moment is generated in the planetary gear device 19 during reverse travel, and this counter-moment is generated in the lower oil chamber 45 of one hydraulic ram 33 and the upper oil chamber 48 of the other hydraulic ram 34, respectively. It is canceled by the resultant force of the reaction forces that occur equally. Therefore, also in this case, the anti-moment is received by the double bottom 25 via the hydraulic rams 33 and 34.

On the hydraulic gauge 52 of the hydraulic pipe 47 connecting the oil chambers 44 and 46, the reaction force against the counterclockwise counter moment is displayed. A counterclockwise counter moment is displayed on the pressure gauge 51 provided on the hydraulic pipe 49. The reaction force displayed on the pressure gauges 51 and 52 represents a torque on the outer shaft 12 of the counter-rotating shaft 8 that is indirectly transmitted through the casing 20. Since the sum of the power distributed to the counter-rotating shaft 8 corresponds to the torque of the engine 2, the torque of the inner shaft 11 can be obtained by subtracting the obtained torque of the outer shaft 12 from the torque of the engine 2. ..

Further, the double bottom 25 is deformed in the vertical direction due to a change in the water of the hull 9 or the like. In this case, the height H of the axial center of the inner shaft 11 of the propulsion shaft 6 from the double bottom 25 changes according to the change in the amount of bending of the double bottom 25. For example, when the double bottom 25 is deformed and raised, and the axial center height H is lowered, equal loads are applied to both lower oil chambers 45 and 46, and the oil in the lower oil chambers 45 and 46 is pushed out. Is discharged. The discharged oil is pressure-fed to the upper oil chambers 44 and 48 which are paired with each other through the hydraulic pipes 47 and 49. As described above, the hull deformation can be allowed or absorbed by the oil moving from the lower side to the upper side or from the upper side to the lower side according to the amount of the hull deformation.

Further, one end of the hydraulic ram 33 is rotatably connected to the tip of the bracket 31 via a pin 35, and the other end is rotatably connected to the double bottom 25 via a pin 43. Therefore, the hydraulic rams 33 and 34 will not be unduly loaded when the planetary gear unit 19 is tilted.

As described above, in the present invention, since the double-acting hydraulic rams 33 and 34 are used to support the anti-moment generated in the planetary gear device 19, the number of the hydraulic rams 33 and 34 is reduced to half compared with the conventional one. In addition, it is possible to reduce the number and to eliminate the need for supporting means such as the pedestals 73 and 74, thereby simplifying the equipment and achieving downsizing, and labor saving in the installation and release work of the device. Further, since the pedestals 73 and 74 are not required, it is possible to narrow the ship width of the portion where the planetary gear device 19 is arranged, the hull resistance is reduced, and the propulsion performance is improved.

In the above embodiment, the counter rotating shaft 8 is adopted as the propulsion shaft system 6, but the present invention is not limited to this. The propulsion shaft system 6 may be a single shaft. Further, it is possible to connect the hydraulic rams 33, 34 by reversing the upper and lower ends thereof.

[0025]

[Effect of the device]

 In short, according to the present invention, since the double-acting hydraulic ram is adopted to support the anti-moment generated in the planetary gear device, the number of hydraulic rams can be reduced to half and the supporting means such as the pedestal is not required. It is possible to achieve simplification and miniaturization.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a support device for a planetary gear device according to the present invention.

FIG. 2 is an enlarged sectional view showing a main part of FIG.

FIG. 3 is a side sectional view showing an example in which a support device for a planetary gear device is adopted in a hull.

FIG. 4 is a schematic cross-sectional view showing a conventional support device for a planetary gear device.

[Explanation of symbols]

 1 Output Source 3 Propulsion Device 6 Propulsion Shaft System 19 Planetary Gear Device 25 Double Bottom 31, 32 Bracket 33, 34 Double-acting Oil Ram 44, 45, 46, 48 Oil Chamber 47, 49 Hydraulic Piping

Claims (1)

[Scope of utility model registration request] 1. A planetary gear, which is provided on a propulsion shaft system connecting an output source and a propulsion device, spaced apart from a fixed system such as a double bottom of a hull, and for decelerating or reversing and transmitting power to the propulsion device. In the device, a bracket is extended from the planetary gear device to both left and right sides, and a front end portion of the bracket and the fixed system are connected by a double-acting hydraulic ram, and a pair of upper and lower oil chambers formed in one hydraulic ram. And a pair of upper and lower oil chambers formed in the other hydraulic ram, which are alternately connected by hydraulic pipes.