JPH01138325A - Generator for engine - Google Patents

Abstract

PURPOSE:To absorb the vibration of an engine, and thereby arrange a case in proximity to a frame by letting an air cleaner be supported by the frame elastically supporting the engine, and connecting said case with the engine by a flexible suction duct. CONSTITUTION:A generator 5 and an engine 6 driving it are elastically supported above the feet member 4 of a supporting frame 1 via vibration proof rubber 7 respectively. And and upper and a lower section in the front side of both the generator 5 and the engine 6 are covered with a control box 11 and an air cleaner 12 respectively. In this case, the case 12 is fixed with screws 16 onto the lower frame 2 of the supporting frame 1 together with the box 11. And the case 12 is connected with the carburetor 42 of the engine 6 by a flexible suction duct 41. This constitution allows the vibration of the engine 6 to be absorbed by the suction duct 41, thereby enabling the case 12 to be arranged in proximity to the supporting frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-soundproof engine generator used, for example, for transportation.

[Conventional technology]

As a non-soundproof engine generator, for example,
As disclosed in Publication No. 84193, it is common to elastically support a generator and the engine that drives it at the bottom of a support frame formed by bending pipes, and support the air cleaner case and muffler to the engine. It is configured to allow

By the way, this type of engine generator is used by moving it to the work place, and the place where it is installed and the work place are close to each other, so it is preferable for the noise to be low in terms of the work environment. Therefore, increasing the size of the air cleaner case to reduce intake noise has attracted widespread attention.

[Problem that the invention seeks to solve]

However, in conventional engine generators of this type, the air cleaner case vibrates with the engine, so if the air cleaner is made large, there is a risk that it will come into contact with the support frame. For this reason, it is necessary to provide sufficient space between the air cleaner case and the support frame.
There was a problem in that the air cleaner case could not necessarily be made larger.

[Means for solving problems]

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an engine generator that can reduce noise by increasing the size of the air cleaner case. In the engine generator according to the present invention, an air cleaner case is supported by a support frame on which an engine is elastically supported, and the air cleaner case and the engine are connected by a flexible intake duct.

[Effect]

In the present invention, engine vibrations are absorbed by the intake duct and are prevented from being transmitted to the air cleaner case, so the air cleaner case can be placed close to the support frame.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a front view showing an engine generator according to the present invention, Fig. 2 is a front view showing an engine generator according to the present invention;
The figure is a side view, FIG. 3 is a rear view, and FIG. 4 is a plan view showing the engine. In these figures, the reference numeral 1 indicates a support frame. This support frame 1 has a pair of lower frames 2 which are formed in a U-shape that is open upward and are arranged parallel to each other at intervals in the front-rear direction, and a lower frame 2 which is open downward and connects the upper ends of these lower frames 2. It consists of a pair of upper frames 3 formed in an octopus shape, and leg members 4 that connect the front and rear lower frames 2 at the lower part. 5 is a generator, and 6 is an engine that drives the generator 5. These are coaxially arranged and connected, and are elastically supported on the leg members 4 via anti-vibration rubber 7.

11 is a control box that covers the front upper part of the generator 5 and the engine 6; 12 is an air cleaner case body that is disposed below the control box 11 and covers the front lower part of the generator 5 and the engine 6. The control box 11 and the air cleaner case main body 12 are integrally molded with resin as shown in FIGS. 5 and 6. That is, the recessed portion 1 is formed in the upper part of the resin plate 13.
A control box 11 is formed by providing the recessed portion 13b at the bottom thereof, and an air cleaner case main body 12 is formed by providing the recessed portion 13b at the bottom thereof. In addition, the shape is a rectangle long in the width direction when viewed from the front so that the space between both sides of the lower frame 2 can be generally closed, and two pairs of left and right notches are provided on both sides that open downward. Support pieces 14 are integrally provided to protrude in the width direction. On the other hand, a plate-shaped bracket 15 is fixed to the rear side of the lower frame 2 in correspondence with the support piece 14, as shown in FIG. A fixing screw 16 fastens the support piece 14 to the bracket 15 and supports the control box 11 and the air cleaner case body 12 on the lower frame 2.

The front opening of the control box 11 has an edge 11a projecting outward, and is closed by an operation panel 21. The operation panel 21 has various outlets and is attached with mounting screws 22. Also, on the back of the control box 11, there is a through hole 25 through which a cable 24 for supplying power to the outlet via the switch 23 is routed.
The through hole 25 and the cable 24 are sealed with a sealing member 26 made of rubber.

On the other hand, a concave portion 1 is provided on the front surface of the air cleaner case body 12.
Air cleaner case cover 3 that closes the front opening of 3b
1 is covered to form an air cleaner. As shown in FIG. 8, this air cleaner case cover 31 has an engaging protrusion 32 at the upper end and an engaging piece 33 having an engaging hole at the lower end.
is provided. Then, the engaging protrusion 32 is engaged with the engaging hole 34 of the control box 11, and the engaging piece 33 is engaged with the retaining protrusion 35 provided at the lower end of the air cleaner case body 12, thereby attaching it to the main body. ,
A filter element 36 is held between the main body and the main body. 37
38 are three intake ports opened on the back side of the air cleaner case body 12; 38 is a passage forming wall forming an intake passage; 39
4 is a discharge port, and 40 is a blow-by gas return port.

Reference numeral 41 denotes an intake duct formed into a cylindrical shape from a flexible material such as rubber, and connects the air cleaner case body 12 and the carburetor 42 attached to the engine 6. The air intake duct 41 has an annular groove 41a on the air cleaner case main body 12 side, and is fitted into the exhaust port 39. On the other hand, on the carburetor 42 side, the carburetor 4
It is held by elastic force by being covered with the connecting part of No. 2.

51 is a fuel tank that covers above the generator 5 and engine 6. This fuel tank 51 is made of sheet metal, with an upper member 52 open downward and a lower member 53 open upward, integrated by a joint flange formed around these members. It is formed downward in the front along the inclination of the frame 3. The joining flange surface of the joining flange is inclined forward downward so that the joining flange on the front side of the fuel tank is provided at the lower edge of the fuel tank 51. In other words, the upper member 52 is formed deep at the front and shallow at the rear so that the upper member 53 forms almost the entire front surface of the fuel tank.1. Lower member 53
Correspondingly, the front part is shallow and the rear part is deep.

54 is a reinforcing member that connects both sides of the support frame 1 at the front. This reinforcing member 54 is formed in a groove shape that is open to the rear in cross section, and the front end of the joining flange of the fuel tank 51 faces. Further, a lower end portion 54a of the reinforcing member 54 extends downward behind the edge portion 11a of the control box 11. Therefore, the fuel that has flown down the joint flange is prevented from flowing toward the operation panel 21 side. A rubber member 55 is interposed between the joining flange and the reinforcing member 54, and supports the front portion of the fuel tank 51. A reinforcing member 56 connects both sides of the support frame 1 at the rear, and supports the rear end of the joint flange. 57 connects the rear end of the joining flange to the reinforcing member 56 via a rubber bush 58 and a collar 59.
This is a fixing screw that is fixed to the

Reference numeral 61 represents a cap that is removably attached to approximately the center of the upper surface of the fuel tank 51, and reference numeral 62 represents a meter provided at the front of the fuel tank 51 on the generator side.

This meter 62 is housed in a recessed part of the fuel tank 51,
The front surface is tilted forward and downward in the same manner as the front surface of the fuel tank 51 so that it can be easily read from above. This is a muffler case with a built-in muffler case, and a muffler 65 connected to an exhaust pipe 64 is accommodated and held inside.6
6 is a coil starter provided on the side of the engine 6.

In the engine generator configured as described above, when the handle of the recoil starter 66 is pulled, the engine 6 is started, and the intake air flows through the intake port 37 of the air cleaner case main body 12 and passes through the intake passage formed by the passage forming wall 38. After passing through, it is filtered by a filter element 36 and introduced into the engine 6 through the intake duct 41.

Here, since the air cleaner case body 12 and the engine 6 are connected by the flexible intake duct 41, even if the air cleaner case body 12 is supported on the lower frame 2, vibrations of the engine 6 can be absorbed into the air. Duct 41
It is possible to suppress vibrations of the engine 6 from being transmitted to the air cleaner case body 12.

Therefore, the air cleaner case body 12 will not vibrate and come into contact with the support frame 1. Therefore, the air cleaner case main body 12 and the air cleaner case cover 31 can be brought very close to the support frame 1. That is, the space formed by the support frame 1 can be fully utilized for arranging the air cleaner case body 12 and the air cleaner case cover 31. In other words, the air cleaner case can be made larger,
Intake noise can be reduced.

In addition, in this embodiment, the air cleaner case body 12
Since the control box 11 and the engine 6 are integrally formed from a synthetic resin material, a large soundproof wall can be formed in front of the engine 6 by these members. Therefore,
Noise at the front of the engine 6 can be reduced more effectively.

〔Effect of the invention〕

As explained above, according to the present invention, the air cleaner case is supported by the support frame on which the engine is elastically supported, and the air cleaner case and the engine are connected by a flexible intake duct, so that vibrations of the engine can be avoided. can be absorbed by the intake duct and the air cleaner case can be placed close to the support frame.

Therefore, the space formed by the support frame can be fully utilized for arranging the air cleaner case. As a result, the air cleaner case can be made larger and intake noise can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the engine generator according to the present invention, FIG. 2 is a side view, FIG. 3 is a rear view, FIG. 4 is a plan view showing the engine, and FIG. 5 is the V of FIG. -V line sectional view, Figure 6 is a front view showing the control box and air cleaner case body, Figure 7 is a -V line sectional view of Figure 1,
FIG. 8 is a sectional view taken along the line ■--■ in FIG. 1. 1... Support frame, 5... Generator, 6...
・Engine, 11...Control box, 12
... Air cleaner case body, 14 ... Support piece, 15 ... Bracket, 41 ... Intake duct. Patent applicant Yamaha Motor Co., Ltd.

Claims (1)

[Claims] In a non-soundproof engine generator in which a generator and an engine driving the generator are elastically supported at the lower part of a support frame, an air cleaner case is supported by the support frame,
This engine generator is formed by connecting the air cleaner case and the engine with a flexible intake duct.