JPS59131728A - Auxiliary machinery attaching apparatus for water- cooled engine for motorcycle - Google Patents

Abstract

PURPOSE:To enable to attach auxiliary machinery to an engine compactly as a whole, by disposing a cooling-water pump and a lubricating-oil pump side by side in a recess formed at the bottom of the engine. CONSTITUTION:A recess 8 is formed at the bottom of an engine which is mounted on the frame of a vehicle body. A cooling-water pump Pw and a lubricating- oil pump Po are disposed side by side in the recess 8, and they are clamped to the engine. Thus, since the water pump Pw and the oil pump Po are disposed in the vicinity of the bottom of the engine in the manner that they are not projected to the outside of the engine, it is enabled to construct an engine compactly as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for an auxiliary machine for a motorcycle engine, particularly a two-stroke engine, namely a cooling water pump and a lubricating oil pump for the engine.

Motorcycle engines, especially water-cooled engines, have a large number of auxiliary equipment attached to the engine, including water-cooled auxiliary equipment, so dead space is formed between these auxiliary equipment and the engine. It is required that the auxiliary equipment be compactly stored within the limited space of the vehicle body, and that the auxiliary equipment can be easily installed and maintained, so that there is no need to travel outside the vehicle. Conventional water-cooled engines do not always satisfy the above requirements.

Therefore, the main object of the present invention is to provide an auxiliary equipment mounting device for a water-cooled engine for a motorcycle that satisfies the above-mentioned requirements. A recess is formed at the bottom,
A water pump for cooling the engine and an oil pump for lubricating the engine are housed in parallel in this recess, and these are attached to the engine.

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

In FIG. 1, a running engine E is suspended on a body frame F of a motorcycle between front and rear wheels Wf and Wr. The engine E is a two-cycle three-cylinder engine, and the vehicle body 7
two front cylinders C, , inclined forward of the arm F;
C2 and one rear cylinder C3'l extending to the road blade.

Each piston 18, 1□, 13 in the front and rear cylinders C1+''2 and C3 is a funnel rod 21゜2□
, 2. are connected to a common crankshaft 3 via. A capretor 4 is disposed between the two front cylinders 'I+62 and the rear cylinder 63.

The crankcase 5 common to the front and rear cylinders CI + c'2 and c'3 is divided into upper and lower halves, and the upper case half 5tL and the lower case half 5d are connected by connecting bolts 6 (Fig. 5), 7, they are joined together from above and below.

A recess 8 is formed in the front of the crankcase 5 of the engine E, and the front, left side, and lower surface are open in the direction of movement of the motorcycle. A cooling water pump Pzv for the engine E and its lubricating oil pump po are housed and attached to the crankcase 5.

As clearly shown in FIGS. 2 and 3, the water pump pw is disposed deep inside the recess 8 and is mounted on a side wall 9 inside the crankcase 5 that defines the recess 8. Hole 11
A bolt 10.10.
・It is fixed in place. The inner end of the water dyeing pump shaft 12 of the water pump pw protrudes into the crank case 5 and is connected to the crank case 5.
It is rotatably supported on the outer wall of the crank case 5
Inside, a driven gear 13 is fixed to the water pump shaft 12, and this driven gear 13 is fixed to a drive gear 14 fixed to a drive shaft 28, and this drive gear 14 is connected to a crank via a transmission gear mechanism Tγ to be described later. It is linked to axis 3. One end of a water pipe 16 is connected to the discharge port 15 of the water pump l) W, and the other end of this water pipe 16 is connected to the water supply port 1 of the engine E.
Connected to 7.

Further, one end of a water suction pipe 19 is connected to the water suction port 18 of the water pump pw, and this water suction pipe 19 is connected to a radiator Rf in the middle.
The other end is connected to the outlet port 20 of the engine E through the interposition. Therefore, due to the operation of engine E, the crankshaft 3
When the is rotated, this rotation is transmitted through the speed change gear mechanism Tr, the driving gear 14, and the driven gear 13 to the water pump p.
HB is driven, and the pressurized water from the water pump pw passes through the water pipe 16 and flows into the water jacket in the engine E to cool the engine E, then flows into the water intake pipe 19 and is cooled by the radiator R. After that, the water pump J)'(H is returned.

As shown in FIG. 3, the recessed portion 8 includes the water pump p.
The oil pump Po is disposed outside w (on the left side in the traveling direction of the motorcycle). This oil pump po has a mounting base 21 fixed to the ceiling wall of the recessed portion 8, that is, the bottom wall 22 of the crankcase 5 with fixing bolts 23. (Fig. 3).

As clearly shown in FIG. 2, an oil pump drive shaft 26 is vertically rotatably supported between the crankcase 5 and the mounting base 21, and the worm 27 is fixed to the oil pump drive shaft 26. It is meshed with a worm gear 29 that is integrated with the drive shaft 28 of the drive gear 14 . An oil pump shaft 30 provided in the pump body 24 is removably connected to the lower end of the oil pump drive shaft 26, and when the oil pump drive shaft 26 is driven, the oil pump 'po
is now driven.

As shown in FIGS. 2 and 3, the inlet 31 of the oil pump po is communicated with the oil tank T through a flexible oil suction pipe 32, and the outer periphery of this oil suction pipe 32 has a spiral metal wire body 3
The 32 oil-absorbing pipes are wrapped with 32 °C and reinforced with 32 °C. The oil pump also has three first, second and third discharge ports 341.

342 and 343 are opened, and these discharge ports 34,
.

34□ and 343 have the first to third oil supply pipes 35,
, 35□ and 353 are connected, and their oil supply pipes 35□
, 35□ and 353 extend upward and their other ends are
Intake systems C, I2 corresponding to two front cylinders C"1, C2 and one rear cylinder C"3, respectively.

Connected to J3. First to third oil supply pipes 35, 352.

353 is a rigid tube 3 whose intermediate portion is made of metal or the like.
6, a flexible tube 37 whose both ends are made of rubber synthetic resin, etc.
It is made up of. and the first to third oil supply pipes 35
The intermediate portions of 352 and 353 are bundled together and fastened together with a fastener 38, and also brazed to a cover stay 40, which will be described later.

As clearly shown in FIGS. 3 to 5, an L-shaped cover mounting stay 40 is attached to the bottom wall 22 of the crankcase 5 above the concave portion 8.
The cover mounting stay 40 is in contact with the engine E.
, on top of crankcase 5.

The lower case halves 5u, 5d are jointly tightened and fixed to the bottom surface of the crankcase 5 by the plurality of connecting bolts 6, 6, . . . that connect the lower case halves 5u, 5d together. The cover mounting stay 40 has a rectangular cover 42 as shown by the chain line in FIG. 3 and the solid line in FIGS.
is fixed, and this cup (-42 is the oil pump po
covers the bottom of the Further, the middle part of the cover 42 is formed in the shape of a gutter, and this gutter-shaped part 42α allows the oil pump p to be pumped.

The connecting portion between the inlet 31 and the oil absorption pipe 32 is covered.

As shown in FIGS. 3 and 4, the tip of the operation lever 43 for adjusting the discharge amount of the oil pump po is connected to the inner 4 of the operation wire 44.
4i is connected, and the other end of the inner 44i is linked to a throttle (not shown) of the engine E, so that its discharge amount is adjusted and controlled according to the load of the engine E. The outer 440 of the operating wire 44 is connected to the cup (
- It is inserted and held by a support piece 45 that stands up from the mounting stay 40.

In FIG. 6, an input shaft 46 and an output shaft 47 are rotatably supported in the crankcase 5 parallel to the crankshaft 3, and the crankshaft 3 and the input shaft 46 are connected to the ends of the crankshaft 3. They are interlocked via a crank gear 4B that is fixed to the crank gear 4B and a clutch gear 49 that meshes with the crank gear 4B and is supported by the input shaft 46. A clutch CI is provided at one end of the input shaft 46 for coupling or disengaging the crankshaft 3 and the input shaft 46 as usual.
6 and the output shaft 47 are interlocked by a transmission gear mechanism Tγ having a gear train of a plurality of gears as usual.

A small gear 50 that meshes with the clutch gear 49 is rotatably supported at one end of the input shaft 46.
is meshed with a floating gear 51 rotatably supported on one end of the output shaft 47, and this floating gear 51 is further meshed with a kick gear 52. The kick gear 52 is rotatably supported by a kick shaft 53 which is rotatably supported by the crankcase 5. A kick lever 54 that is rotated by the driver is connected to the outer end of the kick shaft 53, and the kick shaft 53 is rotated by the rotation of the kick lever 540. A ratchet wheel 55 is splined to the kick shaft 53 so as to be slidable in the axial direction, facing one side of the kick gear 52.
The spring 56 biases the kick gear 52 so that its ratchet teeth 55α engage the ratchet teeth 52α of the kick gear 52.

A crank case 5 is provided on one side of the cutter wheel 55.
A guide plate 57 is provided which is fixed to the ratchet ring 55, and the opposing surface of the guide plate 57 facing one side of the ratchet ring 55 is formed into a tapered cam surface.

A return spring 59 is interposed on the outer periphery of the kick shaft 53 via a sleeve 58. Both ends of the return spring 59 are engaged with the kick gear 52 and the crankcase 5, and when the kick force is released, this The kick shaft 53 is returned to the kick release position (FIG. 6) by the spring force of the return spring 59.

A coil spring 60 for preventing backlash is wound around the kick shaft 53 inside the sleeve 58, and this coil spring 60
is compressed between one side of the kick gear 52 and the inner surface of the crankshaft 3, biases the kick gear 52 to one side, eliminates play between the kick gear 52 and the kick shaft 53, and This acts to eliminate backlash at the meshing portion between the gear and the floating gear 51.

A drive chain wheel 61 is fixed to one end of the output shaft 47,
This drive chain wheel 61 is connected to the rear wheel Wr via a chain wheel 62.
It is possible to drive a driven check 7 (not shown) which is interlocked with.

As shown in FIG. 2, the drive gear 14 for driving the oil pump P's and the water pump pw is meshed with the small gear 50, and the drive gear 14 is connected to the drive shaft 2.
It is fixed to 8.

Next, the operation of one embodiment of the present invention will be explained.

When the two-stroke three-cylinder engine E is operated, 30 revolutions of the crankshaft are transmitted to the output shaft 47 via the clutch C't and the transmission gear mechanism Tr, and from this, the rear wheels Wr are transmitted via the drive chain wheel 61. Can be driven.

By the way, when the clutch gear 49 rotates, the drive shaft 28 is rotated via the small gear 50 meshed with the clutch gear 49 and the drive gear 14 (FIGS. 2 and 3).

As a result, the oil pump drive shaft 26 is rotated via the worm gear 29 and the worm 27, and the oil pump po connected to the drive shaft 26 is driven.

Further, the driving gear 140 can rotate the water pump pw by driving the driven gear 13 (FIG. 3) on the water pump shaft 12 meshed with the driving gear 140.

As the oil pump po rotates, the lubricating oil in the oil tank T is sucked into the oil pump po through the oil suction pipe 32, and the oil pressurized there flows through the three first to third discharge ports 34. ．． 34□, 343 to 1st to 3rd oil supply pipes 35.
．． 35□, front and rear cylinder C through 353
It is introduced into the intake systems C1, C2, and C3, and is sucked into the engine E together with fuel during the intake stroke, so that lubricated parts within the engine E can be lubricated.

Also, by driving the water pump pw, the cooling water is pumped into the water jacket inside the engine E, and after cooling the engine E,
It passes through the radiator RY and is returned to the water pump pw.

Incidentally, both the oil pump po and the water pump pvu are compactly housed in a recess 8 provided at the bottom of the engine E without creating a dead space between them and the engine E, and protrude outward from the engine. There are almost no parts. The lower surface of the oil pump po is covered with a cover 42 to prevent interference with obstacles.

As described above, according to the present invention, a concave portion is formed at the bottom of an engine suspended on a vehicle body frame, and a water pump for cooling the engine and an oil pump for lubricating the engine are housed in parallel in this concave portion. Since I installed it on the engine,
The water pump and the oil pump are located close to the bottom of the engine and are hardly protruded outward by the engine,
Overall, it can be arranged extremely compactly.

Furthermore, both the water pump and the oil pump can be protected by the rigid body of the engine, and since they are located away from the heat generating part of the engine, they are less affected by heat.

Particularly, the device of the present invention is effective when implemented in a two-stroke engine that does not have an oil sinter in the lower part of the engine.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of a motorcycle equipped with an engine equipped with the device of the present invention, FIG. 2 is a partially cutaway enlarged side view of the engine, and FIG. The figure is a partially cutaway view taken along the line shown in FIG. 2, and FIG. 4 is a bottom view of the water pump and oil pump mounting parts of the engine.
Figure 5 is a longitudinal sectional view taken along line V-V in Figure 3, Figure 6 is Figure 2 VI
- It is a VT line cross-sectional view. E...engine, F...body frame, PO...
Oil pump, pw...Water pump 8...Concave part

Claims (1)

[Claims] An automatic vehicle characterized in that a recess is formed at the bottom of an engine suspended on a vehicle body frame, a cooling water pump for the engine and an oil pump for lubricating the engine are housed in parallel in the recess, and these are attached to the engine. Auxiliary equipment mounting device for water-cooled engines for motorcycles.