JPH076079Y2 - V drive type marine reduction / reversing machine - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) In the present invention, the main engine is installed at the rear end of the hull, and the reduction / reversing gear is closely attached to the main shaft of the main engine. The present invention relates to a V drive type marine reduction / reversing machine which is taken out by inclining below the main engine.

(Prior Art) The V-drive type marine reduction / reversing machine expands the use space in the ship,
It is widely adopted because it contributes to the improvement of ship speed and stability of running by moving the center of gravity to the rear.

3 and 4 show a conventional V drive type marine reducer, and FIG. 4 is a sectional view taken along line IV-IV of FIG.

In FIGS. 3 and 4, reference numeral 1 denotes a portion corresponding to a general reduction / reversing machine, which is tilted from a horizontal position in order to connect the output shaft 2 with the same shaft center as that of the propulsion shaft 3 which is obliquely mounted. Mounted on the input shaft 5 connected via a flexible joint to a flywheel (not shown) of the main engine 4 in order to obtain a space in which the output shaft 2 does not connect to the lower portion of the main engine 4.
Is integrally provided, and the conical gear 6 is meshed with a cylindrical gear 8 which is integral with the forward rotation shaft 7 of the reduction / reversal machine 1 which is tilted with respect to the input shaft 5 and is casing. 9 is mounted between the main engine 4 and the reduction / reversing machine 1 to widen the space between the shafts integrally connecting the two.

A forward rotation hydraulic clutch 10 is provided on the forward rotation shaft 7, a reverse rotation hydraulic clutch 14 is provided on a reverse rotation shaft 13 integrated with a driven gear 12 that meshes with a drive gear 11 integrated with the forward rotation shaft 7, and clutches 10 and 14 are provided.
The clutch carrier (15) on the input side of the
And the reverse rotation shaft 13 and the pinion shaft on the output side (16)
Are rotatably supported on the forward rotation shaft 7 and the reverse rotation shaft 13, respectively,
A forward rotation pinion 17 and a reverse rotation pinion 18 are provided integrally with the pinion shaft (16), and the clutch piston (19) is operated by pressure oil supplied from a hydraulic source (not shown) to the clutch carrier (15) through a switching valve. Is inserted in the clutch carrier (15) and the backing plate (20) integrated with the clutch carrier (15), and the input side clutch plate (22) is spline-fitted to the inner peripheral portion of the clutch carrier (15). ) And an output side clutch plate (21) spline-fitted to the outer periphery of the pinion shaft are alternately arranged, and the clutch plates (21) and (22) are connected to the clutch piston (1
By switching and engaging the forward rotation clutch 10 or the reverse rotation clutch 14 by pressing with 9), forward rotation or reverse rotation is transmitted from the output shaft 2 through the joint 23 to the propeller 25 through the joint 23. It is configured.

(Problems to be Solved by the Invention) The conical gear 6 is also referred to as a taper gear or a conical gear, and its outer shape is similar to a bevel gear. It is cut on a hobbing machine using a hob. When viewed in the axial direction, conical gears made in this way have the same number of teeth regardless of diameter, and the dislocation coefficient continuously increases in the same module from the small diameter end to the large diameter end. It can be considered as stacking of dislocation gears with narrow tooth width. Therefore, if it is an involute gear of the same module, it can be meshed with a cylindrical gear as well as a conical gear with an arbitrary cone angle.
Further, meshing between parallel shafts, shafts having an arbitrary crossing angle, and interleaving shafts is also possible. Moreover, conical gears have the following advantages:
It is possible to improve tooth contact, and it is easier to cut compared to bevel gears without the need for a dedicated gear cutting machine,
For such purposes, it is preferably used instead of the bevel gear.

However, conical gears require a lot of trial cutting to obtain continuous smooth tooth contact in the tooth trace direction, and especially when the peripheral speed of the gear is high, elaborate work is required to suppress noise generation. To do.

Further, the size of the lower part of the housing when the reduction / reverse gear is attached to the hull is limited due to the narrow width of the hull, and the size of the large gear integrated with the output shaft 2 located at the lowermost part is limited. Therefore, a large reduction ratio cannot be obtained. As a result, a deceleration ratio that is insufficient is provided between the conical gear 7 and the cylindrical gear 8 on the input side, but as a result, there is also a problem that the torque transmission capacity of the hydraulic clutch that receives decelerated rotation increases.

The present invention has been made to remedy the above-mentioned drawbacks.

(Means for Solving the Problem) In order to solve the above-mentioned drawbacks, in the present invention, a housing of a speed reducer / reverser that changes the rotational speed from the main engine and transmits it is integrally provided on the bow side of the main engine. Attach the input shaft of this speed reducer / reverse gear to the crankshaft of the main engine through a flexible joint and a flywheel, install a forward rotation hydraulic clutch on this input shaft, and engage the drive gear integrated with this input shaft. A reverse rotation hydraulic clutch is provided on the reverse rotation shaft integrated with the matching driven gear, and the forward rotation pinion and the reverse rotation pinion connected to the output side of the forward rotation hydraulic clutch and the reverse rotation hydraulic clutch are axially supported in parallel with the input shaft and the reverse rotation shaft. Meshes with an intermediate large gear that is integral with the intermediate shaft,
The intermediate pinion as a cylindrical gear integrated with this intermediate shaft,
It is characterized in that it meshes with an output large gear as a conical gear integrated with an output shaft that is supported by being inclined concentrically with the propulsion shaft.

(Effect) The present invention relates to a pinion meshed with a separately provided intermediate gear integrally with an intermediate shaft provided between a conical gear integrally formed with an output shaft and an output side pinion of a forward rotation clutch and a reverse rotation clutch. Since two stages of deceleration between the large gear and the intermediate pinion and the conical gear can be obtained, the diameter of the conical gear can be reduced without increasing the capacity of the hydraulic clutch as in the conventional case, and the rotation speed can also be increased. Since it is reduced, it is possible to reduce the size of the housing of the reduction / reversal machine to fit the bottom of the ship, and the machining is facilitated as the peripheral speed of the conical gear decreases.

(Embodiment) FIG. 1 shows an embodiment of the present invention. In FIG. 1, the main engine 26 is installed near the rear end of the hull, the housing 28 of the speed reducer / reverser 27 is integrally attached to the front side of the main engine 26, and is tilted from below on the same side as the input side. The output shaft 29 is taken out, and is connected to the output shaft 29 via a joint with a propulsion shaft 30 which is inclined and attached below the main engine 26.

The input shaft 31 of the reduction / reverse gear 27 thus mounted is connected to the crank shaft of the main engine 26 via a flywheel from a flexible joint (not shown), and the forward rotation hydraulic clutch 32 is connected to the input shaft 31. A reverse rotation hydraulic clutch 36 is provided on a reverse rotation shaft 35 that is integrated with a driven gear 34 that meshes with a drive gear 33 that is integrated with the input shaft 31, and a reverse rotation hydraulic clutch 36 is provided respectively on the input side integrated with the respective shafts 31 and 35 of the clutches 32 and 36. On the outer circumference of the input side clutch plate (38) axially slidably fitted to the inner circumference of the clutch carrier (37) and the pinion shaft (39) rotatably supported by the shafts 31 and 35, respectively. The output side clutch plate (40), which is axially slidably fitted to the output side clutch plate (40), is connected to the annular clutch piston (41) fitted to the clutch carrier (37) from a hydraulic source (not shown) through a switching valve to supply hydraulic pressure. Give,
This clutch piston (41) and backing plate (4
2) Press into engagement with and hydraulic clutch 32
The forward rotation pinion 43 and the reverse rotation pinion 44 integrated with the pinion shafts (39) of 36 and 36 mesh with the intermediate large gear 46 integrated with the intermediate shaft 45, and the intermediate pinion 47 integrated with the intermediate shaft 45 is the output shaft.
29 meshes with the output large gear 48 as a conical gear integrated with 29, and forward rotation or reverse rotation is imparted to the output shaft by switching and engaging the forward rotation hydraulic clutch 32 or the reverse rotation hydraulic clutch 36, It is configured to transmit to the propeller 49 via the propulsion shaft 30.

In the above embodiment, in the engagement between the intermediate shaft 45 and the inclined output shaft 29, the intermediate pinion 47 is a cylindrical gear and the output large gear 48 is a conical gear. It is possible to use a gear, a cylindrical gear for the output / output large gear 48, or a conical gear for both the intermediate pinion 47 and the output large gear 48, both of which are included in the present invention.

(Effect of the Invention) Since the power is directly transmitted from the main engine to the hydraulic clutch, a two-step speed reduction structure can be obtained without increasing the transmission capacity of the hydraulic clutch, and a conical gear is applied to the output large gear or the intermediate pinion. Since the peripheral speed becomes low, the processing of the conical gear becomes easy. In addition, since the diameter of the large output gear can be reduced, it is possible to reduce the width of the housing installation portion of the reduction / reverse gear, and it is possible to install the output gear on a narrow portion of the ship bottom.

[Brief description of drawings]

FIG. 1 shows a simple structure of one embodiment of a marine reduction / reverse gear of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
A simple structure of a conventional marine reduction / reversing machine is shown in FIG.
4 is a cross-sectional view taken along line IV-IV in the figure. 26 …… Main engine, 27 …… Reduction / reverse gear, 29 …… Output shaft 30 …… Propulsion shaft, 31 …… Input shaft, 32 …… Forward rotation hydraulic clutch, 3
3 …… Driving gear, 34 …… Driven gear, 35 …… Reverse rotation shaft, 36 …… Reverse rotation hydraulic clutch, 43 …… Forward rotation pinion, 44 …… Reverse rotation pinion, 45 …… Intermediate shaft, 46 …… Intermediate large gear , 47 …… Intermediate pinion, 48 …… Output gear

Claims (3)

[Scope of utility model registration request] 1. A reduction / reversing machine (27) for shifting and transmitting the rotational speed from a main engine (26) to a propulsion shaft (30) which is positioned vertically below the main engine and is inclined and attached to the stern side. The housing (28) is integrally attached to the bow side of the main engine (26), and the input shaft (31) of this reduction / reverse gear (27) is attached to the crankshaft of the main engine (26) with a flexible joint and a flywheel. Connect through,
The forward rotation hydraulic clutch (32) is provided on the input shaft (31),
A reverse rotation hydraulic clutch (36) is provided on a reverse rotation shaft (35) integrated with a driven gear (34) that meshes with a drive gear (33) integrated with the input shaft (31), and the forward rotation hydraulic clutch (32) and reverse rotation are provided. A forward rotation pinion (43) and a reverse rotation pinion (44) connected to the output side of the hydraulic clutch (36) are integrated with an intermediate shaft (45) that supports the input shaft (31) and the reverse rotation shaft (35) in parallel. The intermediate pinion (47) as a cylindrical gear, which is meshed with the intermediate large gear (46) of (1), is tilted coaxially with the propulsion shaft (30), and is supported by the output shaft (29). ) And an output large gear (48) as a conical gear integrated with
Drive type marine reduction / reversing machine. 2. The intermediate pinion (47) as a cylindrical gear and the output large gear (48) as a conical gear are replaced with an intermediate pinion as a conical gear and an output large gear as a cylindrical gear, respectively. And V described in the first item
Drive type marine reduction / reversing machine. 3. A V-drive type marine reduction and reverse gear according to claim 1, further comprising an intermediate pinion as a conical gear instead of the intermediate pinion (47) as a cylindrical gear.