JP2561939Y2 - Pump device in vehicle engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pump device for an engine of a vehicle having a water pump and an oil pump applied to, for example, a motorcycle.

[Conventional technology]

Conventionally, as a pump device of this kind, as disclosed in Japanese Patent Publication No. 63-36404, when a water pump and an oil pump are driven via separate drive gears, the number of parts is large, the drive system is complicated and In order to increase the size and increase the mounting space, it is known that these are driven by a common drive gear.

That is, as shown in FIG. 2, an oil pump 20 is provided on one side wall 1a of the engine case 1, and a water pump is provided on the other side wall 1b.
10 and the pump drive shafts 2 and 3 of the pumps 10 and 20 are coaxially disposed so that the end portions 2 adjacent to each other.
The a and 3b are connected by pins (not shown), and a pump gear 4 meshing with a drive gear (not shown) is attached to one end 3a of the pump drive shaft 3 of the oil pump 20. 7 is a pump cover of the water pump 10, 8 is a pump housing of the water pump 10, and 9 is a pump cover of the oil pump 20.

[Problems to be solved by the invention]

By the way, in the above pump device, the water pump 10 is separately attached to the left drive shaft 2 and the oil pump 20 is attached to the right drive shaft 3 which are separately formed, and the pumps 10 and 20 are assembled. 10, 20 on both sides 1a, 1b of case 1
It is attached to.

According to the above configuration, the drive shaft 2 of the water pump 10 and the drive shaft 3 of the oil pump 20, as well as the pump cover 7 and the pump housing 8 of the water pump 10, and the oil pump 20
The pump cover 9 is separately provided, and a large number of pins and bearings 5a, 5b, 6a for connecting the drive shafts 2, 3 are required, so that the number of parts increases, and the assembling work is troublesome. But not
Due to the large size and weight, and the rattling based on the pin connection of the drive shafts 2 and 3, mechanical noise generated during operation of the engine causes noise.

Further, the water pump housing 8 is provided with a pump cover 7.
In addition, although the case 1 is fastened together, the pump cover 9 of the oil pump 20 is not fastened together, so that there is a problem that the assembling work is troublesome.

These problems have substantially the same problems in the mounting structure of the fluid pump in the prime mover disclosed in Japanese Utility Model Laid-Open No. 62-54244.

On the other hand, Japanese Utility Model Application Laid-Open No. 54-44339 discloses that the water pump 10 and the oil pump 20 are set adjacent to each other on a single drive shaft 50 as shown in FIG. , A lubricating oil pump in an internal combustion engine having a common pump housing 4 is disclosed.

In the water pump 10, mechanical seals 52 and 53 fitted to the drive shaft 50 are disposed on both end sides of the impeller 51 to prevent leakage of fluid and to prevent oil leakage in the common pump housing 4. An annular groove 54 and a communication passage 55 are formed in the bearing portion of the oil pump 20, and the communication passage 55 is communicated with the suction hole 56 so that oil flowing into the bearing portion from the high pressure side of the discharge hole 57 of the oil pump 20 is annularly formed. The liquid is returned to the suction hole 56 through the groove 54 and the communication path 55.

However, according to the above configuration, the oil pump 20 is provided on one end side of the common pump housing 4 and the water pump 10 is provided on the other end side thereof. Since the two pumps 10 and 20 are attached to both ends of the one drive shaft 50, the assembling work of the two pumps 10 and 20 is troublesome.
58 and the pump cover 59 of the oil pump 20 are separately required, and there are problems such as an increase in the number of parts and an increase in weight.

The present invention has been made to solve the above-mentioned problem, and it is intended to reduce the number of parts to reduce the size and weight, simplify the assembling work, suppress the generation of mechanical noise, and discharge the oil from the oil pump. It is an object of the present invention to provide a pump device for an engine of a vehicle having high cooling efficiency of the oil to be cooled.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a single pump drive which is rotatably supported on a side wall of a case of a vehicle engine and has one end as an input portion and the other end protruding outward from the side wall of the case. A shaft, an oil pump housed in a pump housing formed on the side wall of the case, and assembled to a protruding shaft portion of the pump drive shaft, and an oil pump cover for closing an outer opening of the pump housing of the oil pump. A pump housing that also serves as a water pump housing, a water pump housed in the pump housing and assembled to a protruding shaft portion of the pump drive shaft, and a pump cover of a water pump that closes an outer opening of the pump housing. Comprising an oil pump, a pump housing, a projection shaft portion of the pump drive shaft,
A water pump and a pump cover of the water pump are assembled in this order, and the pump housing and the pump cover of the water pump are jointly fastened to the case.

[Action]

According to the above configuration, a single pump drive shaft is rotatably supported on the side wall of the case in the vehicle engine, one end of which is used as an input portion, and the other end protrudes outward from the side wall of the case. A water pump and an oil pump are mounted on the projecting shaft portion, and the pump housing of the water pump and the pump cover of the oil pump are also used as a pump housing, so that the oil pump, the pump housing, the water pump and the pump cover are combined. Assemble in this order,
Since the pump housing is fastened to the case together with the pump cover, the number of components of each of the above components is reduced, and a reduction in size and weight and simplification of the assembling work can be achieved.

In addition, the pump housing has one end side as the oil pump cover of the oil pump and the other end side as the water pump housing, so that the pump housing of the water pump and the pump cover of the oil pump are also used.
The number of parts is further reduced, the size and weight can be reduced, and the assembling operation can be simplified. In addition, the oil pump and the water pump are arranged adjacent to each other so that oil discharged from the oil pump is transferred from the pump housing by heat transfer. Thus, the oil inside the oil pump can be efficiently cooled by the water inside the water pump, and the cooling efficiency can be improved.

Further, since the oil pump and the water pump are arranged on the outer surface side of the side wall of the case, the oil pump, the pump housing, the water pump, and the pump cover can be assembled in this order from the outside of the case,
The assembling work is easy, and the pump drive shaft is composed of a single drive shaft. Therefore, mechanical noise from this pump drive shaft is eliminated, and noise generation in this type of pump device is reduced. It can be suppressed as much as possible.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an example of a pump device in an engine according to the present invention.

In the figure, reference numeral 30 denotes a single pump drive shaft, both ends 30a and 30b of which are supported by bearings 1c on both side walls 1a and 1b of an engine case 1. Above pump drive shaft
The pump gear 4 for input is fixed to one end 30a of the case 30, and the other end 30b projects outward from the side wall 1b of the case 1. The projecting shaft portion includes the oil pump 20, the pump housing 12, the water The pump 10 and the pump cover 11 are assembled in this order, and the oil pump 20 and the water pump 10 are arranged on the outer surface side of the side wall 1b of the case 1 so as to be adjacent to each other.

The water pump 10 is, for example, a centrifugal pump, and includes a pump cover 11, a pump housing 12, an impeller 13, a suction pipe (not shown), a discharge pipe 14, a mechanical seal 15, and the like. Pump housing 12A of water pump 10 and oil pump 20
And is fastened together with the pump cover 11 to the case 1 with bolts 17. Oil pan at the bottom of the engine in motorcycles
42 are provided.

In the water pump 10, for example, a discharge pipe 14 communicates with a water jacket (not shown) of the engine, and the discharged cooling water is supplied under pressure to the water jacket, and a suction pipe is connected to a radiator (not shown). ).

A second annular space 16 is formed between the mechanical seal 15 and the oil seal 25 in the oil pump 20,
The annular space 16 is open to the atmosphere through an atmosphere opening hole 18 formed in the water pump housing 12A outward in the radial direction (on the front side of the paper surface of FIG. 1). This open air hole 18
Is for discharging water leaked from the mechanical seal 15 to the second annular space 16 in the direction of arrow B to the outside of the engine.

On the other hand, the oil pump 20 is, for example, a trochoid pump, and includes an oil pump cover 12B and a pump housing 1.
d, trochoidal gears 21 and 22 housed in the pump housing 1d, a suction hole 23 provided in the oil pump cover 12B, a discharge hole 24 provided in the engine case 1, and an oil seal. 25 and has.

The oil pump cover 12B is formed integrally with the pump housing 12A of the water pump 10, and the pump housing 12A and the pump cover 12B constitute one pump housing 12. The pump housing 12 is made of, for example, an aluminum casting. It is composed of such a metal. A pump housing 1d of the oil pump 20 is formed by the other side wall 1b of the case 1 of the engine.
One end surface 12b of B is formed as a flat surface that is in sliding contact with the other end surfaces of the gears 21 and 22.

The suction hole 23 of the oil pump 20 communicates with an oil reservoir 42a of an oil pan 42 via an oil passage 40 and a strainer 41 provided in the case 1 of the engine. Is in communication with As a result, the oil F in the oil storage section 42a is
As shown by, it is sucked into the pump chamber 28 between the gears 21 and 22 through the strainer 41, the oil passage 40, and the suction hole 23, and is pressure-fed and supplied from the discharge hole 24 to a bearing portion of a crankshaft. 50 is a cooling fin.

A first annular space 26 is formed between the suction hole 23 of the oil pump cover 12B and the oil seal 25, and a communication passage 27 is formed in the oil pump cover 12B between the suction hole 23 and the annular space 26. Are formed, and this communication passage 27 is formed.
The oil is leaked from the sliding surface 12a between the pump drive shaft 30 and the pump cover 12B in the direction of arrow D to the suction hole 23 by the communication between the annular space 26 and the suction hole 23.

According to the above configuration, the case 1 in the vehicle engine
A single pump drive shaft 30 is rotatably supported on both side walls 1a and 1b of the case 1 and its one end 30a is used as an input part, and the other end 30b is projected outward from the other side wall 1b of the case 1, The water pump 10 and the oil pump 20 are mounted on the protruding shaft portion, and the pump housing 12A of the water pump 10 and the pump cover 12B of the oil pump 20 are also used as the pump housing 12. 12, the water pump 10 and the pump cover 11 are assembled in this order in the axial direction A, and the pump housing 12 is fastened together with the pump cover 11 to the case 1, so that the number of components of the respective components is reduced, and the size and weight are reduced. And simplification of the assembling work can be achieved.

The pump housing 12 has one end face 12b side as an oil pump cover 12B of the oil pump 20 and the other end face 1b.
2c side is a water pump housing 12A, the pump housing 12A of the water pump 10 and the pump cover 1 of the oil pump 20.
2B was also used as the pump housing 12, so that the oil pump 20 and the water pump 10 were adjacent to each other,
The oil discharged from the oil pump 20 is directly cooled by the heat transfer from the pump housing 12, and the oil inside the oil pump 20 can be efficiently cooled with the water inside the water pump 10, The cooling efficiency can be improved.

Further, since the oil pump 20 and the water pump 10 are arranged on the outer surface side of the other side wall 1b of the case 1, the oil pump 20, the pump housing 12, the water pump 10, and the pump cover 11 are arranged in this order in the case 1. Can be assembled from outside, and the assembling work is easy,
Moreover, since the pump drive shaft 30 is composed of a single drive shaft, mechanical noise from the pump drive shaft 30 can be eliminated, and generation of noise in this type of pump device can be suppressed as much as possible. .

The oil leaking from the oil pump 20 to the first annular space 26 is supplied to the suction hole
Since the pressure is returned to 23, it is possible to effectively prevent oil from leaking to the water pump 10 side.

[Effect of the invention]

As described above, the present invention supports a single pump drive shaft on the side wall of a case in a vehicle engine,
One end is used as an input part, and the other end is projected outward from the side wall of the case.
Assembling a pump housing, a water pump and a pump cover in this order, disposing the oil pump and the water pump adjacent to each other on the outer surface side of the side wall of the case,
In addition, since the pump housing is fastened together with the pump cover to the case, the number of parts is reduced to reduce the size and weight, simplify the assembling work, suppress the generation of mechanical noise, and reduce the oil pump. Pump device for an engine of a vehicle with good cooling efficiency of oil discharged from the vehicle.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of an engine pump device according to the present invention, FIG. 2 is a longitudinal sectional view showing a conventional engine pump device, and FIG. 3 is another example of a conventional engine pump device. It is a longitudinal cross-sectional view. 1 ... case, 1a, 1b ... side wall, 10 ... water pump, 11 ...
… Pump cover, 12… Pump housing, 12A …… Water pump housing, 12B …… Oil pump cover, 12b…
… One end face, 12c …… the other end face, 20 …… oil pump, 25…
... oil seal, 30 ... pump drive shaft, 30a ... one end, 30b ... other end, A ... axial direction.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 54-44339 (JP, U) Japanese Utility Model Showa 62-54244 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] A single pump drive shaft which is rotatably supported on a side wall of a case of the vehicle engine and has one end as an input portion and the other end protruding outward from the side wall of the case; And an oil pump housed in a pump housing formed at the protruding shaft portion of the pump drive shaft, and an oil pump cover and a water pump housing for closing an outer opening of the pump housing of the oil pump. A pump housing, a water pump housed in the pump housing and assembled to a projecting shaft portion of the pump drive shaft, and a pump cover of the water pump for closing an outer opening of the pump housing. Install the oil pump, pump housing, water pump and pump cover of this water pump on the protruding shaft part of the shaft. Sequentially assembling the pump device in an engine of a vehicle, characterized in that the pump housing is fastened to the case together with the pump cover of the water pump.