JPS635420Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a coil mounting device for a general-purpose engine generator (ACG), and in particular, divides the crankcase part into upper and lower parts by sandwiching the crankshaft, and attaches the outer end surface of the crankshaft bearing part at the bottom of the crankcase. A mounting part is provided integrally with the lower part, and the coil is mounted and supported through the mounting part, reducing the number of parts.
The present invention relates to a coil mounting device that is easier to assemble and more compact.

Stationary engines, so-called general-purpose engines, are in practical use as generators and compact power sources.
Such a general-purpose engine is equipped with a generator (ACG) as a power source for the ignition system, light source, various indicators, etc. ACG is generally rotationally driven by a crankshaft and consists of a flywheel magnet equipped with a magnet, a fixed side coil, etc. Conventionally, the coil is attached to the end wall of the crankcase with a support stay, the coil is attached to the support stay, and the coil is attached to the end wall of the crankcase. was placed on the inner circumference of the flywheel magnet.

Such conventional coil mounting means attaches a separate support stay to the crankcase to support the coil, so it requires a support stay and a fixing member for the support stay, which increases the number of parts and assembly man-hours. Moreover, since a space is required for mounting the support stay, it is disadvantageous in terms of making the engine more compact.

The present invention was made to improve such conventional inconveniences, and its purpose is to sandwich the crankshaft and divide the crankcase into upper and lower parts.
A mounting section is provided on the outer end surface of the crankshaft bearing section at the bottom of the crankcase, and the coil is mounted and supported through the mounting section, thereby reducing the number of parts, improving ease of assembly, reducing cost, and making it more compact. An object of the present invention is to provide a coil mounting device for a general-purpose engine that can be used for a general-purpose engine.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a vertical side view of the engine, Figure 2 is a side view of the engine.
Only the main parts are shown in two directions as seen by the arrows in the figure.

The engine 1 consists of a cylinder block 2, a cylinder head 3, and a cover 4 on the cylinder head 3. A part 5 forming the upper part of the crankcase is formed integrally with the lower part of the cylinder block 2, and a part 5 is formed in the center of the front and rear lower parts of the cylinder block 2. Bearing half portions 5a, 5b are formed in the portions to support the upper halves of the front and rear journal portions 7a, 7b of the crankshaft 7 in the axial direction. Under the crankcase upper part 5, a lower member 6 having bearing halves 6a, 6b, which support the lower halves of the journal parts 7a, 7b of the crankshaft 7, provided in the center of the front and rear upper parts, is superimposed and connected with bolts 8. The bearing halves 5a, 6a and 5b, 6 are integrated and the journal parts 7a, 7b are joined via a bearing metal or the like.
It is rotatably supported by b.

A piston 9 is fitted into the cylinder 2a of the cylinder block 2, connected to the crankshaft 7 via a connecting rod 10, and connected to the cylinder head 3.
A camshaft 11 is disposed above in parallel with the crankshaft 7.

Since the crankcase lower member 6 substantially constitutes the lower half of the bearing, a case 12 made of a press-formed steel plate is disposed below it, and the case 12 is connected to the outer flange as shown in FIG. The portion 12a is integrated with the flange portion 6c on the outer periphery of the lower member 6,
An oil pan 13 is formed below the crankshaft 7. An oil pump 15 is installed inside the oil pan 13 via a filter 14.
A gear 16 is fixed to the shaft 15a of the crankshaft 7, and meshes with a gear 17 fixed to the base of the outer extension 7c of the crankshaft 7.
A timing belt pulley 18 is fixed on the tip of the extending portion 7c, and a pulley 20 provided at the end of the camshaft 11 in the same direction is connected to the timing belt 1.
9, and 21 is a water pump, the drive pulley 22 of which faces the inside of the belt between pulleys 20 and 18 and engages with it, and the pulley 22 is attached with a fan 24 for cooling a radiator 23. .
The rotation of the crankshaft 7 drives gears 17 and 16, pulley 18, belt 19, and pulleys 20 and 22, thereby rotationally driving oil pump 15, water pump 21, camshaft 11, and cooling fan 24.

The opposite portion of the crankshaft 7 extends outward from the journal portion 7a and is located at the tip 7 of the extending portion 7d.
In this embodiment, a V-pulley 25 is provided at the tip of the extension 7c described above, and both ends of the crankshaft in the axial direction are designated as power take-off parts. A flywheel magnet 26 is fixed to the outside of the bearing parts 5a, 6a on the extension part 7d, a magnet 27 is fixed to the inner periphery of the flange part 26a, and a coil, for example a lamp coil, is fixed to the inside of the trajectory of the magnet. 29
to be placed.

As is clear from FIG. 2, on the axially outer surface of the bearing half 6a on this side of the lower member 6 on the inside of the trajectory of the magnet 27, there are two support stays that are spaced apart in the circumferential direction and protrude outward in the radial direction. 28, 28 are integrally molded with the lower member 6, thick boss portions 28a are formed at the tips of the support stay portions 28, 28, and mounting holes 2 are formed in these portions.
Form 8b. The coil 29 has both ends 29a, 2
9a is applied to the outer end surface of the boss portions 28a, 28a, and both end portions 29a, 29a are attached and supported to the stay portions 28, 28 via the fastening member 30. The coil 29 may be an exciter coil instead of a lamp coil, and the second In the figure, 31 is an exciter coil provided on the outer end surface of the bearing half 5a, and coils 29, 31
The installation can be done in the opposite direction.

In the above, the flywheel magnet 26 rotates with the rotation of the crankshaft 7, and together with this, the magnet 27 rotates around the outer periphery of the coils 29 and 31 to generate electricity.

As detailed above, according to the present invention, even when a steel plate oil pan is provided in the lower part of the crankcase, a stay is integrally provided on the outer surface of the bearing part of the member forming the lower part of the crankcase, and a coil is attached to this stay. Because it is mounted and supported, there is no need for the mounting stay as a separate member, and there is no need for a fastening member for it, reducing the number of parts.Furthermore, since there is no need to install the mounting stay, assembly is easier. This reduces the number of work steps, improves assembly efficiency, and has many advantages, such as being rational in terms of space, making the engine more compact, and, as mentioned above, being advantageous in terms of cost.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a vertical sectional side view of the engine, and Fig. 2 is a view taken from arrow 2 in Fig. 1.
It is a diagram of only the main part of the direction. In the drawing, 1 is an engine, 5 and 6 are crankcase parts, 6 is a lower member thereof, 7 is a crankshaft, 28 is a mounting part, and 29 is a coil.

Claims (1)

[Scope of utility model registration request] The crankcase part is divided into upper and lower parts by sandwiching the crankshaft, and a mounting part is provided on the outer end surface of the crankshaft bearing part of the lower member of the crankcase integrally with the lower member, and the generator (ACG) coil is attached through the mounting part. 1. A coil mounting device for a generator in a general-purpose engine, characterized in that the coil is mounted and supported.