JPS6043170A - Engine - Google Patents

Abstract

PURPOSE:To widen the range of vehicle which can mount this engine and make the posture of the engine upon starting proper by a method wherein a starting shaft hole, capable of mounting a handle starting shaft or a rope starting shaft, is provided on the center of a crank shaft. CONSTITUTION:A crank shaft 3 is force-fitted into and secured to a crank gear 5. A starting handle shaft 9 is force-fitted into and secured to a starting gear 8. The starting shaft 9 is rotated by a starting handle 10 to transmit a starting rotation to a starting gear 8, a small diametral side idle gear 6b, a large diametral side idle gear 6a, the crank gear 5 and the crank shaft 3 sequentially. In case the handle starting method is to be changed to the rope starting method, the handle starting shaft 9 is exchanged by the rope starting shaft, the starting handle 10 is exchanged by a pulley and the starting gear 8 as well as a crank shaft bush 12 are removed. Thus, selection of the handle or rope may be effected simply in accordance with the working vehicle, to which the engine is to be mounted, and the range of mounting this engine may be widened.

Description

[Detailed description of the invention] Conventionally foreign? IVC has a hand-started engine that can be used as both a handle and a rope, but each has a separate starting shaft.

It is an object of the present invention to provide a tow-loading ditch machine that allows easy selection of the handle and the lower part, thereby expanding the tow-loading range and providing an appropriate starting position.

The engine according to the present invention is configured to achieve the above object by providing a starting shaft hole in the center of the crankshaft into which a handle starting lirl 11 and a warzo starting shaft can be attached.

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

In FIG. 1, 1 is a crank gear, 2 is a gear case, 3 is a crankshaft, 4-piece camshaft, and 5 is a crank gear, which is press-fitted into the crankshaft 3. 6 is the idle gear, which consists of two gears, the large diameter gear 6
a is crank gear 5VC.

Path f! I + gear 6b meshes with cam gear 7 and starting gear 8 (/). Force l/gear 7 id Tsunomu shaft 4 (
f (Fixed by means such as press-fitting. The starting gear 8 is fixed by means such as press-fitting into the starting handle/gift 9. The starting handle shaft 9 may be a crankshaft push-wheel bearing, etc.) 12 and a bushy needle bearing press-fitted into the gear case) 1 1. It has a 11υ structure that allows it to rotate more freely than IfC.

I. Locoid Oilnj? The oil pump 013 sucks oil from the suction side oil line and is forcefully fed to the pressure side oil line (■). The pressure-fed oil starts...endor shaft 9
The oil is delivered to the oil line [phase] of the crankshaft and the oil line O of the foot 3.

Reference numeral 14 denotes an idle shaft which is fixed to the crankcase 1 by means such as press fitting. 10 is a starting non-driver, turning the starting shaft 9, starting gear 8 → small diameter side idle gear 6b → dog diameter center j
The starting rotation is given from idle gear 6a to crank gear 5 to crank 3. 15 is a fuel injection pump.

Since it is necessary to match the pitch circle diameter of each gear with the crank gear=D1, and also with the center of the starting shaft 9 and the crank 7 shaft 3, the relationship of 10D2=D3-1-D5 is an essential condition.

] Cylinder volume 71.00 CC class engines are approximately 20 (speed increase l at startup: LZ), and for small shilling volume engines around 200 CC, 25 to 30 is generally selected based on the relationship between human force and starting rotation speed. However, it is determined by trial and error based on the engine compression J::5, the magnitude of the flywheel moment of inertia, the force at startup, etc.

Fig. 2 1/:1 This shows the case where the handle starting method in Fig. 1 is changed to a lobe starting (recoil) method.

9' (Crank 7 Yaft 3 with the shaft for starting the d-lobe)
It is fixed and fixed by means such as press-fitting. 9' glue
A sleeve 16 for loaf zero starting is removed from M: and can be engaged with a rope-wrapped sleeve 17 to change to a crank shirt starting method.

Note that the clearance for the 0 part is reduced to maintain oil tightness.

As mentioned above, since the engine of the present invention is provided with a starting shaft hole to which a crank center t: fc handle starting shaft or lobe starting ll1l+ can be attached, it is easy to select between handle starting and lobe starting with a towing work machine. This has the advantage that the starting position at 1 o'clock is appropriate.

[Brief explanation of drawings]

Fig. 19'An Fig. 2 (d) An embodiment of the present invention, Fig. 1 is a structural diagram when the handle starter is attached, and Fig. 2 is a structural diagram when the starter is installed. U...Crankshaft゛,9...]・Handle starting shaft,
9'・Rose starting l+, 1.8, 18'・Starting shaft hole.

Claims (1)

[Claims] An engine characterized in that a starting shaft hole is provided on the center of the crankshaft to which a handle starting shaft or a rope starting shaft can be attached.