JP2511660Y2 - Bleazer oil reduction device for tilted engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a tilt type engine in which a cylinder and a cylinder head are installed obliquely, and more specifically, a breather generated during tilt operation in which the tilt type engine tilts together with a mobile agricultural machine. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breather spray oil reducing device for a tilted engine that reduces spray oil.

[Prior art]

As shown in FIG. 3 shown as a conventional example, an inclined engine E in which a cylinder 5 and a cylinder head 6 are obliquely installed at a predetermined angle is an engine frame F provided on a substantially horizontal line OO.
A mobile agricultural machine such as a reaper that fixes the base end of the engine frame F, which is fixed on the upper side, is configured as a single-axis wheel type instead of a four-wheel structure, and a single-axis traveling ahead of the engine frame F is performed. Wheels are provided, and the reaper is located in front of the traveling wheels.

For this reason, it is necessary for the mobile agricultural machine to turn on the headland with the entire body tilted in the direction in which the front reaping section is lifted up. The tilting engine E which does is XX shown in FIG.
As indicated by the line, the push rod 15 is steeply inclined by the angle θ in the direction in which the push rod 15 is further inclined downward.

On the other hand, the inclined engine E is provided with a rod passage 21 through which the push rod 15 constituting the valve operating mechanism 20 is provided on the lower surface side of the inclined cylinder 5 and the cylinder head 6, and the rod passage 21 is provided between the tabs 14. The structure is such that it communicates with the oil pan 7 through the oil hole 22.

[Problems to be solved by the invention]

By the way, when the tilted engine E is tilted in the direction in which the push rod 15 moves further downward as shown in FIG. 3, the lubricating oil in the oil pan 7 flows backward from the oil hole 22 through the rod passage 21. Flow into the cylinder head 6 side, pass through the breather 24 provided in the head cover 23, and flow out to the outside. Therefore, the amount of oil flowing out to the outside, that is, the amount of breather injection oil, increases dramatically, and the oil consumption is extremely low. There was a problem that it was very expensive and uneconomical.

Therefore, the present invention was devised to solve the problem in view of the conventional situation described above.By adding an oil storage chamber on the lower surface side of the cylinder and the cylinder head, the breather injection oil amount during tilt operation can be improved. The purpose of the present invention is to provide a breather injection oil reducing device for an inclined engine that can reduce the amount.

[Means for solving problems]

The present invention for achieving the above object provides a rod passage through which a push rod constituting a valve operating mechanism passes, on the lower surface side of an obliquely inclined cylinder and cylinder head, and an oil pan is formed below the rod passage through an oil hole. In the tilted engine that communicates with the oil passage, an oil storage chamber that communicates with the rod passage through the lower communication hole and the upper communication hole is added to the lower surface side of the rod passage.

[Action]

Therefore, a rod passage 21 through which the push rod 15 constituting the valve mechanism 20 is provided is provided on the lower surface side of the cylinder and the cylinder head 6 which are inclined, and the oil passage 22 is provided below the rod passage 21 through an oil hole 22. Even in the tilted engine E communicating with the pan 7, the oil storage chamber 26 communicating with the rod passage 21 via the lower communicating hole 27 and the upper communicating hole 29 is provided on the lower surface side of the rod passage 21. Even when the inclined engine E in which the push rod 15 inclines downward is tilted, the oil that attempts to flow backward from the oil hole 22 communicating with the oil pan 7 through the rod passage 21 to the cylinder head 6 side is communicated with the lower side. Hole 27 or upper communication hole
Since it is stored in the oil storage chamber 26 via 29, it flows backward through the rod passage 21 to the cylinder head 6 side as in the conventional case,
The amount of the breather sprayed oil is reduced without flowing out from the breather 24 of the head cover 23 to the outside.

As a result, the oil consumption amount during the tilt operation of the tilt type engine can be reduced as much as possible.

〔Example〕

Hereinafter, the drawings showing the present invention as an embodiment will be described.

In FIG. 1, the tilted engine E has a crankshaft 1
A crankcase 2 for rotatably supporting the piston is arranged in the vertical direction, and a piston 4 connected to a crankshaft 1 via a crank arm 3, a cylinder 5 for guiding the piston 4, and a connection above the cylinder 5 are provided. A fixed cylinder head 6 is obliquely arranged in an oblique direction, and an oil pan 7 capable of storing a predetermined amount of oil is formed below the crankcase 2.

A cam 10 and a cam 11 having different phases are integrally formed on the cam shaft 9 rotatably supported by the crank case 2 with a distance in the length direction of the cam shaft 9. When the fixed gear 12 is driven by the fixed gear 13 on the crankshaft 1, the camshaft 9 rotates in synchronization with the crankshaft 1.

The cam 10 and the cam 11 are respectively provided with a pair of left and right lower surfaces 14 of lower and lower supports which are slidably supported on the lower surface side of the cylinder 5, the lower ends of which are connected to the upper surfaces of the respective cylinders 14. The upper end of a pair of left and right push rods 15 extending obliquely upward along the lower surface of the cylinder head 6 is connected to one end of a pair of left and right rocker arms 16 tiltably supported above the cylinder head 6, respectively. The other end of the rocker arm 16 is connected to the upper ends of a pair of left and right intake / exhaust valves 19 supported by the cylinder head 6 via a return spring 17, and a valve mechanism 20 for opening / closing the valve 19 is formed by these valves. It is configured.

The pair of left and right push rods 15 are arranged in a rod passage 21 provided on the lower surface side of the cylinder 5 and the cylinder head 6, and a fourth passage is formed on the lower surface side of the rod passage 21.
Similar to the figure, an oil hole 22 is provided between the pair of left and right tabs 14 and communicates with the oil pan 7. Further, a head cover 23 is provided above the cylinder head 6, and a breather 24 for releasing the pressure when the internal pressure becomes high is provided in the head cover 23.

On the lower surface side of the rod passage 21, there is provided an oil storage chamber 26 having a length extending over the lower surfaces of the cylinder 5 and the cylinder head 6, and the oil storage chamber 26 is connected to the lower communication hole 27 and the upper communication hole. An air guide passage 25 for guiding cooling air is provided below the oil storage chamber 26 and communicates with the rod passage through the hole 29.

Further, a fuel tank 30 is arranged above the crankcase 2 of the tilted engine E, and between the connecting pipe 30a fixed to the bottom of the fuel tank 30 and the strainer 31, as shown in FIG. Although connected by a conduit 32, a portion of the conduit 32 that is arranged in a nearly horizontal state where vapor lock is likely to occur is connected by a three-way connecting pipe 33, and the upper side of the three-way connecting pipe 33 is a bypass pipe. By communicating with the fuel tank 30 via 34, the bubbles generated in the conduit 32 can automatically flow into the fuel tank 30 via the bypass pipe 34.

[Effect of device]

As described above, according to the present invention, the rod passage through which the push rod constituting the valve operating mechanism passes is provided on the lower surface side of the cylinder and the cylinder head which are inclined, and the lower side of the rod passage is provided with the oil hole. Even in a tilted engine that communicates with the oil pan, the tilted engine can be operated by providing a storage chamber that communicates with the rod passage through the lower communication hole and the upper communication hole on the lower surface side of the rod passage. Even during tilting operation inclining to the side, oil that tries to flow backward from the oil hole communicating with the oil pan to the cylinder head side through the rod passage is stored in the oil storage chamber via the lower communicating hole and the upper communicating hole. Therefore, during tilting operation of a tilting engine as in the past, backflow in the rod passage to the cylinder head side and out of the breather of the head cover. Without flowing in it can reduce the breather 噴油 amount.

Therefore, the oil consumption amount during the tilt operation of the tilt type engine can be reduced as much as possible.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a side view of a tilted engine showing a main portion in cross section, and FIG. 2 is a side view of a tilted engine provided with an air vent bypass passage. FIG. 3 is a side view of an inclined engine showing a cross section of a main part in a conventional example, and FIG. 4 is a cross sectional view taken along the line AA of FIG. E ... Inclined engine, 5 ... Cylinder, 6 ... Cylinder head, 7 ... Oil pan, 20 ... Valve mechanism, 15 ...
Push rod, 21 …… Rod passage, 22 …… Oil hole,
27 …… Lower communication hole, 29 …… Upper communication hole, 26 …… Oil storage chamber, 23 …… Head cover, 24 …… Breazer.

Claims (1)

(57) [Scope of utility model registration request] 1. A tilt passage in which a rod passage through which a push rod constituting a valve mechanism passes is provided on the lower surface side of a cylinder and a cylinder head which are inclined, and the lower side of the rod passage is connected to an oil pan via an oil hole. A breather spray oil reducing device for a tilted engine in which an oil storage chamber communicating with the rod passage through a lower communication hole and an upper communication hole is additionally provided on the lower surface side of the rod passage.