JP2515523Y2 - Engine generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to an engine generator.

<< Premise Configuration >> The present invention is premised on an engine generator having a structure in which a generator 5 is integrally assembled with an engine 1 as shown in, for example, FIG. 1 to FIG. 3, or FIG. To do.

 The premise structure is as follows.

The output shaft 4 is projected from the case end wall 3 of the crankcase 2 of the engine 1, and the stator 6 of the generator 5 is fixed to the case end wall 3 in the space outside the case end wall 3 and outside the output shaft 4. In the engine generator in which the rotor 7 of the generator 5 is supported on the output shaft 4 so as to be integrally rotatable, the stator 6 is composed of a plurality of unit stators 6a, and the rotor 7 is also composed of a plurality of unit units. A plurality of sets of unit stators 6a are arranged side by side in the axial direction of the output shaft 4, and a plurality of sets of unit rotors 7a are arranged side by side in the axial direction of the output 4. It is characterized by being configured.

As is known, when the generator 5 is a rotating field type, the stator 6 is an armature and the rotor 7 is a field magnet.
In the case of a rotating armature type, the stator 6 is a field magnet and the rotor 7
Consists of an armature.

<< Prior Art >> Regarding the structure of the portion where the stator 6 and the rotor 7 are assembled in the above-mentioned premise structure, in the prior art, as shown in FIG. 4, one set of stators 6b and one set of rotors are used. The structure used was 7b and.

<< Problems to be Solved by the Invention >> When manufacturing a plurality of types of engine generators having different power generation capacities, the above-mentioned conventional techniques have the following problems.

The stator 6b and the rotor 7b need to be manufactured in a size corresponding to the power generation capacity of the engine generator, and it is necessary to manufacture a plurality of types of different sizes in accordance with the number of models having different power generation capacities. there were.

The present invention intends to make the stator and the rotor common parts among a plurality of types of engine generators having different power generation capacities and to promote the diversification of the types of engine generators having different power generation capacities. It is an issue.

<< Means for Solving the Problem >> The present invention is to add the following characteristic structure to the above-mentioned premise structure in order to solve the above problem, as shown in, for example, FIGS. 1 to 3.

That is, the output shaft 4 is projected from the case end wall 3 of the crankcase 2 of the engine 1, and the stator 6 of the generator 5 is attached to the case end wall 3 in a space outside the case end wall 3 and outside the output shaft 4. In an engine generator that is fixed and has the rotor 7 of the generator 5 supported integrally with the output shaft 4 so as to be integrally rotatable, the stator 6 is composed of a plurality of unit stators 6a ... Of the unit rotors 7a ..., the plurality of sets of unit stators 6a ... have different power generation capacities, and the plurality of sets of unit rotors 7a ... correspond to the unit stators 6a. Are arranged differently from each other, and a plurality of sets of unit stators 6a are arranged side by side in the axial direction of the output shaft 4, and a plurality of sets of unit rotors 7a are arranged side by side in the axial direction of the output 4. It is characterized by being installed.

<< Operation >> As shown in FIGS. 1 to 3, based on the case where two sets of the unit stator 6a and the unit rotor are arranged side by side, this is an engine generator having a power generation capacity of 1 time.

These two sets of unit stators 6a and 6a and unit rotor 7a
・ 7a are made to have different power generation capabilities. This power generation capacity is 0.3 times that of one of the pair,
The other set is 0.7 times.

When manufacturing an engine generator with a power generation capacity of 0.6 times or 1.2 times, install 2 or 4 groups of 0.3 times the groups.

When manufacturing an engine generator with a power generation capacity of 0.7 times, 1.4 times, 2.1 times or 2.8 times, one set of 0.7 times the set is 2 sets.
Use 3 sets or 4 sets.

When manufacturing an engine generator with a power generation capacity of 1.3 times or 1.6 times, one set of 0.7 times and one set of 0.3 times are 2
A set or 3 sets are used in combination.

<< Effect of the Invention >> The present invention has the following effects because it is configured and operates as described above.

(I). Commonization of parts of the unit stator and unit rotor between multiple engine generators with different power generation capacity When manufacturing an engine generator with a small power generation capacity, the set of unit stator and unit rotor to be used When the number is reduced and an engine generator having a large power generation capacity is manufactured, the number of sets of unit stators and unit rotors used is increased.

This allows unit stators and unit rotors to be used as common parts across multiple engine generators with different power generation capacities, improving mass productivity and simplifying management of these parts. Therefore, the manufacturing cost can be reduced.

(B). Multiple sets of unit stators 6a ・ 6a and unit rotors 7a ・ that promote diversification of engine generator models with different power generation capabilities
The power generation capacities of the 7a are different from each other, and there are large and small types of power generation capacities.

In this way, the unit rotors 6a ・ 6a ・ unit stators 7a ・ 7a
Since there are multiple types of large and small power generation capacities, it is possible to manufacture more types of engine generators of multiple types with different power generation capacities as compared with the case where there is only one type, It is possible to promote diversification of models.

<< Embodiment >> An embodiment of the present invention will be described below with reference to FIGS.

○ Premise structure Fig. 3 is a partially cutaway front view of a forced-air cooling horizontal shaft type rotating field type multi-pole engine generator with recoil starter. Fig. 1 is a vertical sectional front view of the generator part. It is a vertical left side view of a figure.

In the figure, reference numeral 1 indicates a forced-air cooling engine with a recoil starter, which is provided with a recoil starter 11 and a cooling fan 12 on the left side thereof.

The right end of the crankshaft projects rightward as an output shaft 4 from the case end wall 3 on the right side of the crankcase 2 of the engine 1.

In the space outside the case end wall 3 and on the outer periphery of the output shaft 4, the stator 6 of the rotating field type multi-pole generator 5 is fixed to the case end wall 3 in a set of three cylindrical mounting seats 13. It is fixed with the stud bolt 14 and the nut 15.

The stator 6 of the generator 5 is an armature, and the rotor 7 is a field magnet.

The rotor 7 is arranged so as to rotate around the outer periphery of the stator 6, and is supported by the output shaft 4 via the cup-shaped rotor holder 16 so as to be integrally rotatable. On the end wall of the rotor holder 16, a blower port 17 for cooling the generator and a pushing fan 18 are provided.

○ Characteristic structure The stator 6 consists of two sets of unit stators 6a and 6a. The rotor 7 also comprises two sets of unit rotors 7a and 7a.

The two sets of unit stators 6a.6a are juxtaposed in the axial direction of the output shaft 4 with an appropriate interval, and the interval holding cylinder 19 holds the interval.

The two sets of unit rotors 7a, 7a are arranged in parallel in the axial direction of the output shaft 4 with an appropriate interval, and the interval holding plate 20 holds the interval.

The generated currents of the two sets of unit stators (unit armatures) 6a and 6a are combined with each other and extracted as one large current. As a method of synthesizing the generated currents, the following method (a) or (b) can be considered in addition to the method of connecting the lead wires by a known method.

(A) After the generated currents are combined by wiring, they are converted into a direct current by a common rectifier circuit, and this direct current is converted into a predetermined frequency by an inverter device and output.

(B) Each of the generated currents is individually converted into a direct current by each rectifying circuit and then combined, and the combined direct current is converted into a predetermined frequency by an inverter device and output.

The plurality of sets of unit stators 6a ... Have different power generation capabilities, and the plurality of sets of unit rotors 7a ... Have different power generation capabilities corresponding to the unit stators 6a. To do. As shown in FIGS. 1 to 3, based on the case where two sets of the unit stator 6a and the unit rotor 7a are arranged side by side, this is an engine generator having a power generation capacity of 1 time. For example, the power generation capacity of multiple sets of unit stators 6a and 6a and unit rotors 7a and 7a is 0.
3 times, and the other set is 0.7 times.

[Brief description of drawings]

1 to 3 show a forced air-cooled horizontal axis type rotating field type multi-pole engine generator with a recoil starter according to an embodiment of the present invention. FIG. 1 is a vertical sectional front view of a generator portion, FIG. 2 is a vertical sectional left side view of FIG. 1, and FIG. 3 is a partially cutaway front view of an engine generator. FIG. 4 is a vertical sectional front view of a generator portion showing a conventional technique. 1 ... Engine, 2 ... Crankcase, 3 ... Case end wall, 4 ... Output shaft, 5 ... Generator, 6 ... Stator, 6a
…… Unit stator, 7 …… Rotor, 7a …… Unit rotor.

Claims (1)

(57) [Scope of utility model registration request] 1. An output shaft (4) is projected from a case end wall (3) of a crankcase (2) of an engine (1), and a space around the output shaft (4) is outside the case end wall (3). Then, the stator (6) of the generator (5) is fixed to the end wall (3) of the case, and the rotor (7) of the generator (5) is supported by the output shaft (4) so as to be integrally rotatable. In the engine generator, the stator (6) consists of multiple sets of unit stators (6a) ...
The rotor (7) also comprises a plurality of sets of unit rotors (7a) ..., and the plurality of sets of unit stators (6a) ... have different power generation capacities, and a plurality of sets of unit rotors (7a). Correspond to the unit stators (6a) ... and have different power generation capacities, and a plurality of sets of unit stators (6a) ... are arranged side by side in the axial direction of the output shaft (4). Together with multiple sets of unit rotors (7a) ...
An engine generator characterized in that they are arranged side by side in the axial direction of the output shaft (4).