JP2816517B2 - Vertical axis engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a lawn mower driven by an engine, which can be used with the crankshaft of the engine substantially perpendicular to the working surface of the working machine connected via a power transmission shaft. Related to the vertical axis engine ,
Cams splash stirring and the cam chamber of the lubricating oil by rotating the crank chamber, to a vertical axis an engine with reduced manufacturing costs by reducing the power loss by the lubricating oil amount control due Cylinders between wall stoma.

[0002]

Conventionally, the vertical Jikue engine, as shown in FIG. 5, the crank shaft Kr is both-sided, and the cam shaft Ka
There it is common to position the crankshaft Kr side, also, when the good overhead engine thermal efficiency, the push rod cover side how preparative ing.

[0003]

However, the above-mentioned vertical axis d.
The engine has an extra oil return passage after lubricating the cylinder.
The engine becomes large and needs to be manufactured
Problems such as high cost and high power loss
ing. Accordingly, the present invention is to reduce the output loss, to facilitate preparative <br/> handling doctor, for the purpose of development of vertical axis engine with reduced manufacturing costs.

[0004]

SUMMARY OF THE INVENTION The present invention relates to the conventional
Was made to remove the drawbacks, a crank chamber having a crank shaft of an engine without to it mounted on the work vehicle to be substantially perpendicular to the ground table, the class
And Nrinda adjacent the ink chamber, in a plane containing the said crankshaft and said cylinder <br/> da inner diameter center line, parallel to the crankshaft
The camshaft provided in a shape and the cam gear of the camshaft
And <br/> cam provided on the side opposite the side where the cylinder is disposed, in contact with the cam, be swung by the rotation of the cam
Arranged at right angles to that rocking Dokai rolling lifter or the camshaft
And a tappet that slides according to the
A cam chamber adjacent to the ink chamber and the cylinder ;
More composed valve drive and rotary lifter or Pusshi <br/> Yuroddo connected to the tappet provided, by operating the valve driving device, it alternately opens and closes the exhaust valve and the intake valve of the cylinder It met the vertical axis engine was none to
To allow lubricating oil to enter and exit the crank chamber from the cam chamber.
Control between the cam chamber, the crank chamber, and the cylinder
Control of oil by rotation of the cam in the cam chamber.
By spray lubrication, the crank chamber and cylinder
In order to lubricate the oil
Oh Ru.

[0005]

According to the present invention, the rotation of the cam in the cam chamber is performed .
Actuating the rocking Dokai rolling lifter over or tappet by rolling,
By actuating the push rod connected thereto, the vertical axis engine having a valve driving apparatus for opening and closing an intake valve of the cylinder and the exhaust valve alternately, you <br/> kicking the crank chamber and Cylinders the lubrication oil is performed Ri by the splash lubrication oil by the rotation of the cam in the cam chamber, and the oil pump and unnecessary
Preparative treatment to facilitate and reduce the relatively power loss, further
It is possible to reduce the size of the engine and reduce the manufacturing cost.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a vertical axis engine according to the present invention; A first embodiment of the present invention will be described with reference to FIG. E1 is a vertical axis engine of the present invention,
a slides on the inner cylindrical surface, and a spark plug 12a
A cylinder 1a provided with an intake valve 51a and an exhaust valve 52a at the upper central portion, and a piece supported by an end bearing 23a for converting reciprocating motion of the piston 11a into rotational motion of a crankshaft portion 22a in a crank chamber 21a. levered the crankshaft 2a of the one of the cam 34a attached to the cam shaft 33a of the cam gear 32a which meshes with the crank gear and the cam chamber 31a of the crankshaft 22a, abuts rocking the cam 34a Dokai and the rolling lifter chromatography 41a, rocking rotary lifter
Push rod 421a connected to the over 41a, 4
22a , a valve driving device 4a including a push rod cover 43a , an intake valve 51a and an exhaust valve 52a connected to the push rods 421a and 422a and provided at an upper central portion of the cylinder 1a, and an end of the crankshaft 2a. a cooling fan main body 62a having a blade 61a mounted on the upper part section, and the cooling fins 63a provided on the outer side of the cooling fan body by 62a cooling air to try to cool the lubricating oil in the crank chamber 21a crank chamber 21a , the cooling air suction, air inlet 64a provided outside the upper portion of the order will be discharged the crank chamber 21a, a discharge port 65a, the reel 72a provided with a claw 71a to the shaft tip to be connected to the crankshaft 2a at start When the longitudinal axis engine E1 is started by pulling the rope hung on the hook, the claw 71a is automatically separated from the crankshaft 2a. It is constituted by the location 7a. Note that the output side of the crankshaft 2a is connected to the blade H1 of the lawnmower S1 via a power transmission unit 221a. Also,
Small holes 351a and 361a for controlling the flow of the lubricating oil are provided in walls 35a and 36a separating the cam chamber 31a, the crank chamber 21a, and the cylinder 1a. Next, the operation of the present embodiment, by pulling over the rope reel 72a of the disengaging type rope starter device 7a, to rotate the crankshaft 22a, the cam 34 via a cam shaft 33a
a is rotated, the splash lubrication oil by the rotation of the cam 34a
Is performed, that is, the small portions provided on the walls 35a and 36a are
Through the holes 351a and 361a, the crank chamber 21a
Sunda 1a lubrication oil is performed to, actuates the push rod 421a of the valve drive 4a, and 422a, the intake valve 5
1a, the exhaust valve 52a is opened and closed alternately, the piston 11a is in <br/> reciprocating, vertical axis the engine E1 operates, the power transmission unit 2
21a to rotate the blade H1 of mower S1 via a becomes possible Rukoto.

A second embodiment of the present invention will be described with reference to FIG. First, regarding the configuration of the vertical axis engine E2 of the present embodiment, two cams 341b and 342b are attached to the camshaft 33b, and the cylinder 1b and the piston 11
b, spark plug 12b, crankshaft 2b, crankshaft 2b
Gear, crank chamber 21b, crankshaft 22b, bearing 23b, cam gear 32b, cam chamber 31b, walls 35b, 36b, small holes 351b, 361
b, valve drive 4b, rocking Dokai Tenshiki lifter chromatography 411b, 4
12b, push rods 421b, 422b, push rod cover 43b, intake valve 51b, exhaust valve 52b, blade 61b, cooling fan main body 62b, cooling fin 63b,
Inlet port 64b, outlet port 65b, disconnectable rope starter 7
The relationship between the b, the pawl 71b, the reel 72b, the power transmission unit 221b, the lawnmower S2, the blade H2, and the like is the same as that of the first embodiment.
b is two cams 341b, in addition to operation by the rotation of the 342b will be omitted since it is similar to the first embodiment.

[0008] The third embodiment of the present invention utilizing the Figure 3 that describes <br/>. First, the vertical axis of the engine E3 configuration of this embodiment, the rocking Dokai instead of rolling lifter chromatography, axial 411c disposed perpendicularly to the cam shaft 33c, the tappet slides 412c 413c, 414c Are provided in contact with the two cams 341c and 342c attached to the camshaft 33c, and are attached to the cylinder 1c, the piston 11c, the spark plug 12c, the crankshaft 2c, and the crankshaft 2c.
Crank gear, crank chamber 21c, crankshaft 22c, bearing 23c, cam gear 32c, cam chamber 31c,
Walls 35c, 36c, the small hole 351c, 361c, the valve driving apparatus 4c, Pusshi Interview rods 421c, 422c, Pusshi
Interview Lock compartment cover 43c, the intake valve 51c, exhaust valve 52c,
Blade 61c, cooling fan body 62c, cooling fin 63
c, intake port 64c, discharge port 65c, disconnection-type rope starting device 7c, claw 71c, reel 72c, power transmission unit 221
c, lawn mowers S3, For more such blades H3 are the same as those of the first embodiment, also the operation of this embodiment,
Except for the fact that the valve driving device 4c operates by the rotation of the two cams 341c and 342c, it is the same as the first embodiment and will not be described.

A fourth embodiment of the present invention will be described with reference to FIG. First, regarding the configuration of the vertical axis engine E4 of the present embodiment, the crank shaft 2d is
Are supported by bearings 231d and 232d at both ends, a cylinder 1d, a piston 11d, a spark plug 12d,
The crank chamber 21d is attached to the crankshaft 2d.
Crank gear, cam chamber 31d, cam gear 32d, cam shaft 33d, cam 34d, walls 35d, 36d, small hole 35
1d, 361d, valve drive 4d, rocking Dokai rolling lifter over 41d, pushrod 421d, 422d, the push rod cover 43d, the intake valves 51d, an exhaust valve 52 d, the blade 61d, the cooling fan body 62d, the cooling fins 63d,
Air inlet 64d, discharge exit 65d, disengaging type rope starter device 7
The relationship between d, the pawl 71d, the reel 72d, the power transmission unit 221d, the lawnmower S4, the blade H4, and the like is the same as in the first embodiment, and the operation of this embodiment is also the same as in the first embodiment. Omitted.

The shape, size, material and operating method of each component of the vertical axis engine according to the present invention may be arbitrarily set within the range in which the above objects, functions and effects of the invention described later are achieved. It is needless to say that any of these changes does not change the gist of the present invention.

[0011]

[Effect of the Invention] As described above in detail, the present invention is,
To rocking Dokai rolling lifter over or to open and close an intake valve of the cylinder and the exhaust valve alternately by the rotation of the cam in the cams chamber
Tappet and vertical engine with a more composed valve drive and the connected pushrod thereto, the lubricating oil which definitive in crank chamber and Cylinders, the splash lubrication oil by the rotation of the cam in the cam chamber It is performed Ri good, handling to facilitate oil pump as waste, a relatively power loss
It is possible to reduce the size of the engine and reduce the manufacturing cost . As described above, the present invention has unique effects that have never been seen before, and is a practical and excellent invention.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vertical axis engine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a vertical axis engine according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a vertical axis engine according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a vertical axis engine according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional vertical axis engine.

[Explanation of symbols]

1a, 1a, 1c, 1d Cylinders 2a, 2b, 2c, 2d Crankshafts 21a, 21b, 21c, 21d Crank chambers 31a, 31b, 31c, 31d Cam chambers 32a, 32b, 32c, 32d Cam gears 33a, 33b, 33c, 33d camshafts 34a, 341a, 342a, 341c, 342c, 3
4d cam 4a, 4b, 4c, 4d valve actuating device 41a, 41b, 41d rocking Dokai rolling lifter over 413c, 414c tappet 421a, 421a, 421c, 421d, 422a,
422a, 422c, 422d Push rods 51a, 51a, 51c, 51d Intake valves 52a, 52b, 52c, 52d Exhaust valves E1, E2, E3, E4 Vertical engine S1, S2, S3, S4 Lawn mower

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F01M 9/06 F02B 67/00 F02B 63/00

Claims (1)

(57) [Claims] 1. An engine crankshaft adapted to be mounted on a working machine so as to be substantially perpendicular to the ground surface .
A crank chamber, a cylinder adjacent to the crank chamber,
In a plane including the crankshaft and the cylinder inner diameter center line,
A cam shaft provided on the crank shaft and parallel shape, the side where the cylinder is disposed with respect to the cam gear of the cam shaft
A cam provided on the opposite side of contact with the cam, the mosquito
Rocking Dokai rolling lifter or the mosquito swings by the rotation of the arm
Tappet that slides according to the axis of the shaft arranged at right angles to the
And adjacent to the crank chamber and the cylinder
And the swinging rotary lifter or the tappet
More composed valve drive push rod that is connected is provided, by operating the valve driving device, and no order will open and close alternately the exhaust valve and the intake valve of the silicon <br/> Sunda
A vertical axis engine , wherein the flow of lubricating oil from the cam chamber to the crank chamber is
Control between the cam chamber and the crank chamber and the cylinder
And oil splash due to rotation of the cam in the cam chamber.
Lubrication allows the crankcase and cylinder
Vertical engine characterized by lubricating the oil
N.