JPS5922366Y2 - Cooling device for gear type reversing speed reducer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for discharging heat generated by internal loss during power transmission to the outside in a gear type reversing reduction gear.

In general, in power transmission devices such as hydraulically operated clutches, reversing clutches, gear type speed increasers, and speed reducers used when driving work equipment with prime mover power such as an engine, oil pools at the bottom of the device. If the engine has a mechanism that uses an oil pump to circulate the oil inside as pressurized oil for operation and lubrication to various parts, it is necessary to cool the oil that gets heated due to the loss of horsepower in each part during operation.

Conventionally, if heat dissipation from the outer wall of the housing of these power transmission devices was insufficient for cooling, air cooling with a radiator or
Multi-tube coolers are used for water cooling, but since they all require hydraulic piping, maintenance is not easy, and there is a high incidence of problems such as oil leaks and breakage of the piping, and the hydraulic control mechanism is difficult to maintain. However, gear-type reversing speed reducers, which require miniaturization for use in ships, etc., have the disadvantage of being complicated and costly, and the installation of a cooling device increases the overall size of the speed reducer. We must prevent this from taking shape at all costs.

In addition, as another conventional cooling system, there is one in which a cooling water pipe with a large number of cooling fins protruding from the outer circumferential surface is directly connected to the cooling oil reservoir chamber. There is a risk that only the stagnant oil will be cooled and the overall cooling effect will not be sufficient.

The present invention is an attempt to improve these points.It has a high cooling effect, and its overall size is small enough to be installed in the oil reservoir of a gear type reversing reduction gear, thereby eliminating the need for hydraulic piping. The object of the present invention is to provide a cooling device for a gear type reversing speed reducer that can eliminate piping troubles, has a simple structure, and is inexpensive to produce.

An embodiment of the present invention will be described with reference to the drawings regarding a gear type reversing clutch equipped speed reduction gear for a marine main engine.

A forward rotation clutch shaft 2 and a reverse rotation clutch shaft 3 are rotatably provided in the housing 1, and these clutch shafts 2, 3
The outer cylindrical parts of the forward and reverse rotation clutches 4 and 5 are fitted together, and the clutches 4 and 5 are fitted onto the clutch shaft 2.3.
The inner cylindrical portions of the forward and reverse clutches 4 and 5 are fitted together in a rotatable manner, and the intermediate gears 6 and 7 integrally provided on the circumferential outer cylindrical portions of the forward and reverse clutches 4 and 5 are meshed with each other, and Small gears 8 and 9 provided integrally are meshed with a large gear 10 rotatably supported within the housing 1.

Further, an input part 11 is provided at one end of the forward rotation clutch shaft 2 to which power from a marine main engine is transmitted, and an input part 11 is provided at the other end between the inner and outer cylindrical parts of the forward and reverse rotation clutches 4 and 5. A drive shaft of a hydraulic pump 12 that supplies operating oil or lubricating and cooling oil to each movable part is connected to the provided friction plate (not shown).

Further, an output portion 15 is provided at the outer end of the shaft 14 of the large gear 10.

Further, an oil reservoir chamber 17 for cooling oil is provided at the bottom of the housing 1, and a shaft 2 is provided from one end of the oil reservoir chamber 17 to the other end.
．． 3. A cooling water pipe 23 having spiral cooling fins 22 on the outer surface is arranged perpendicularly and horizontally to A cooling water inlet/outlet 25 provided in the section 26
The cooling water flows from one nozzle flange 24 through the cooling water pipe 23 to the other nozzle flange 2.
It is designed to flow from 4 onwards.

Further, the cooling water pipe 23 is covered with an outer pipe 18 having an inner diameter slightly larger than the outer diameter of the cooling fins 22, and the outer pipe 18 has both ends connected to openings 2 provided at both ends of the bottom of the housing 1.
6, and the annular part 2 is inserted between the outer pipe 18 and the cooling water pipe 23.
7, and the opening 26 of the housing 1 located at both ends of the annular portion 27 is sealed with a nozzle flange 24 to prevent oil from leaking to the outside. An oil inlet 19 is provided to communicate between the inside of the outer pipe 18 and the inside of the outer pipe 18.
Further, the other end of the outer tube 18 is provided with a discharge port 21 communicating with a lower end opening of a hydraulic pump suction side oil passage 20 connected to the hydraulic pump 12 for sucking cooling oil.

The oil passage 20 is a cast oil passage integrally formed inside the housing 1.

The cooling fins 22 may be provided protruding from the outer surface of the cooling water pipe 23 not in the axial direction but in the circumferential direction, and therefore may be formed by a large number of discs.

Then, due to the suction action of the hydraulic pump 12, the oil sump in the oil sump chamber 17 is sucked into the outer pipe 18 from the suction port 19, and further collides with each cooling fin 22 of the cooling water pipe 23. Forcibly along the discharge port 21
from this discharge port 21 to the hydraulic pump suction side oil passage 2
Pressure oil is sent to the suction port of the hydraulic pump 12 via the hydraulic pump 12, and then discharged from the discharge port of the hydraulic pump 12, which operates the forward/reverse clutches 4 and 5, and is supplied to each movable part to lubricate them. After that, the oil is stored in the lower oil reservoir chamber 17.

In such a flow of oil, the oil is forcibly moved from one end of the cooling water pipe 23 to the other end by the outer pipe 18, so the oil in a high temperature state absorbs the heat of each movable part. The heat is effectively radiated to the cooling water in the cooling water pipe 23 via the cooling fins 22, and the cooling water is cooled.

To explain the forward and reverse deceleration action of this reducer,
For forward rotation, the forward rotation clutch 4 is engaged to transmit the rotation of the intermediate gear 6 to the small gear 8, and the reverse clutch 5 is disengaged so that the intermediate gear 7 and the small gear 9 are mutually connected. The large gear 10 can be rotated without interference, and the small gear 8 of the normal rotation clutch 4 is directly connected to the large gear 10.
In the case of reverse rotation, the forward rotation clutch 4 is disengaged to release the integral rotation of the intermediate gear 6 and small gear 8, and the reverse rotation clutch 5 is
are in a connected state so that the rotation of the intermediate gear 7 is transmitted to the small gear 9, and the rotation of the intermediate gear 6 of the forward rotation clutch 4 is transmitted to the large gear 10 via the intermediate gear 7 and the small gear 9 of the reverse clutch 5. be communicated to.

According to the present invention, since the cooling water pipe and the outer pipe are arranged horizontally in a direction perpendicular to the axis of the gear type reversing speed reducer, the cooling water pipe and the outer pipe can be provided long in the diametrical direction of the gear, which is orthogonal to the axis. , high cooling capacity.

In addition, since the cooling water pipe is covered with an outer pipe having an inner diameter slightly larger than the outer diameter of the cooling fin, the outer circumference of the cooling fin and the inner surface of the outer pipe are close to each other, so the oil flow in the annular part is controlled by the cooling fin. The entire circumference is subject to strong disturbance and a large heat transfer capacity can be obtained.

Furthermore, since there is a gap between the cooling fins and the outer tube over the entire circumference, it is easy to assemble and disassemble the cooling water tube and the outer tube, and there is little risk of damaging the cooling fins at that time.

In addition, both ends of the outer tube are fitted into the openings provided on both sides of the bottom of the housing, and the openings on both sides of the housing are sealed with nozzle flanges that support the cooling water pipes, thereby sealing the support structure of the cooling water pipes and the housing. The structure is simple and assembly and disassembly is easy.

In addition, since a discharge port is provided at the end of the outer tube that communicates with the hydraulic pump suction side oil passage formed integrally within the housing, the outer tube can be discharged by simply inserting the outer tube into the opening of the housing. The outlet can be communicated with the oil passage, eliminating the need for hydraulic piping at the discharge port, simplifying the structure, facilitating assembly, disassembly and repair, and reducing manufacturing costs, which is highly profitable.

Moreover, since the structure is compact in this way, it can be easily incorporated into the narrow oil sump chamber of a small-sized marine reversing speed reducer without changing the housing.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a speed reducer equipped with a cooling device for a gear type reversing speed reduction device of the present invention, and FIG. 2 is a side sectional view thereof. 1... Housing, 12... Hydraulic pump, 17... Oil reservoir chamber, 18... Outer pipe,
19...Suction port, 20...Hydraulic pump suction side oil passage, 21...Discharge port, 22...
・Cooling fin, 23... Cooling water pipe, 24...
... Nozzle flange, 26 ... Housing opening, 27 ... Annular part.

Claims (1)

[Scope of utility model registration request] A cooling water pipe, which is provided with a cooling fan in the circumferential direction on the outer surface, is installed in the oil reservoir chamber in the housing of a gear type reverse damping device having a hydraulic clutch, and runs across it from one end of the housing to the other end of the housing. The cooling water pipe is placed horizontally in a direction perpendicular to the axis of the reversing speed reducer, and is covered with an outer pipe having an inner diameter slightly larger than the outer diameter of the cooling fin, and both ends of the outer pipe are covered with an outer pipe having an inner diameter slightly larger than the outer diameter of the cooling fin. It is inserted into the openings provided on both sides of the bottom of the housing, the openings on both sides of the housing are sealed with nozzle flanges that support the cooling water pipe, and an inlet port communicating with the oil reservoir chamber is provided at one end of the outer pipe. What is claimed is: 1. A cooling device for a gear type reversing speed reducer, characterized in that a cooling device for a gear-type reversing speed reduction device is provided, and a discharge port is provided at the other end of the housing to communicate with a hydraulic pump suction side oil passage formed integrally within the housing.