JPH1162611A - Vertical crank shaft type engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a vertical crank shaft type engine provided with a starter so as to suppress manufacturing costs in a low level. SOLUTION: In a vertical crank shaft type engine 2 in which a driven apparatus 3 is substantially and directly connected to a crank shaft 4 arranged vertically, an installing part of a starter 8 is arranged on a joining surface of a cylinder block 5 of a supporting base 13 fixed to a crank shaft direction one end surface of a cylinder block 5 for fixing the driven apparatus 3. Since a supporting base connecting the engine and the driven apparatus 3 to each other necessitates high rigidity originally, the influence of manufacturing costs is few even if rigidity is improved for installing the starter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical crankshaft engine for industrial machinery.

[0002]

2. Description of the Related Art A starting motor for an industrial machine engine used as a power source such as a generator or a compressor is conventionally mounted on a stay integrally formed with a cylinder block or a crankcase, or a bolt is attached to the cylinder block or a crankcase. In general, it was either mounted on a stay separate from the stopped engine (see Japanese Patent Application Laid-Open No. 8-49555).

[0003]

However, the method of integrally molding a stay of sufficient strength into a cylinder block or a crankcase cannot avoid the complication of the mold for casting the cylinder block or the crankcase. The method using the body stay increases the number of assembling steps and is troublesome in securing accuracy. That is, all of these conventional methods have a factor of increasing the manufacturing cost, and have an unsatisfactory aspect.

The present invention has been made in order to solve the problems of the prior art, and a main object of the present invention is to provide a vertical crankshaft engine having a starting motor.
It is to be improved so that the manufacturing cost can be reduced.

[0005]

According to the present invention, there is provided a vertical crankshaft engine in which a driven machine is substantially directly connected to a vertically disposed crankshaft. To this end, a mounting portion for the starting motor is provided on a joint surface of the support base fixed to one end surface of the cylinder block in the crankshaft direction with the cylinder block. According to this, since the supporting base connecting the engine and the driven machine originally requires high rigidity,
Even if the rigidity is increased due to the mounting of the starting motor, the influence on the manufacturing cost is reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 shows a main part of a power unit of an air conditioner constructed according to the present invention. The power unit 1 includes a four-cycle single cylinder engine 2 and a rotary compressor 3 driven by the engine 2 for compressing refrigerant gas.

The engine 2 is a so-called vertical crankshaft type engine in which a crankshaft 4 is vertically arranged. A cylinder head 6 is provided at the left end of the cylinder block 5 in the drawing.
A crankcase 7 is connected to the right end, a starting motor 8 is arranged adjacent to the crankcase 7, an oil pan 9 is connected to the cylinder block 5, the crankcase and the lower side of 7, and the pinion 10 of the starting motor 8 meshes. A flywheel 12 having a ring gear 11 is fixed to an upper end of the crankshaft 4.

A support base 13 for supporting the compressor 3 as a driven machine is fixed to the upper surface of the cylinder block 5 (one end surface in the crankshaft direction). The support base 13 has a substantially cylindrical shape, and a lower end thereof is bolted to an upper surface of the cylinder block 5 and a bottom plate 14 of the compressor 3 is bolted to an upper end thereof. Thereby, the periphery of the flywheel 12 is substantially entirely covered. Further, the starting motor 8 is bolted to the support base 13 on the joint surface side with the cylinder block 5.

The driven shaft 15 of the compressor 3 is fixed to the center of a coupling 17 having three spokes 16 whose outer ends are bolted to the outer periphery of a flywheel 12 fixed to the crankshaft 4. . That is, the compressor 3 is driven substantially directly connected to the crankshaft 4.

[0011]

As described above, according to the present invention, the mounting portion for the starting motor is provided on the joining surface of the support base for fixing the driven machine to one end surface of the cylinder block in the crankshaft direction with the cylinder block. The following special effects can be obtained. a. Since the mounting stay for the starting motor is not provided on the cylinder block or the crankcase, the mold for casting the cylinder block and the crankcase does not have to be complicated, and the number of assembling steps does not increase, so that the manufacturing cost can be reduced. b. Since the meshing portion between the ring gear and the pinion is covered with the support base, the radiation of the starting noise is reduced. c. As shown in the embodiment, if the starting motor is provided on the opposite side of the cylinder with respect to the crankshaft, the weight of the starting motor can be used as a damping mass, so that the vibration of the engine can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a power unit according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power unit 2 Engine 3 Compressor 4 Crankshaft 5 Cylinder block 6 Cylinder head 7 Crankcase 8 Starting motor 9 Oil pan 10 Pinion 11 Ring gear 12 Flywheel 13 Support base 14 Bottom plate 15 Drive shaft 16 Spoke 17 Coupling

Claims (2)

[Claims] 1. A vertical crankshaft engine in which a driven machine is substantially directly connected to a vertically arranged crankshaft, wherein a support base is fixed to one end surface of a cylinder block in a crankshaft direction to fix the driven machine. A vertical crankshaft engine, wherein a mounting portion for a starting motor is provided on a surface of the support base that is joined to the cylinder block. 2. The vertical crankshaft engine according to claim 1, wherein the support base receives a ring gear fixed to a crankshaft so that a pinion of the starting motor can be engaged.