JPS59190087A - Fixing structure of throttle opening detector to outerboard engine - Google Patents

Abstract

PURPOSE:To protect a throttle opening detector from vibration to be produced in an outerboard machine, by fixing the housing of said detector to a carburetor body while coupling the detecting shaft of said detector directly to the throttle shaft. CONSTITUTION:The housing 33 of a throttle opening detector 30 is fixed through a fixing bracket 38 to a carburetor 24. The detecting shaft 34 of said detector 30 and the throttle shaft 28 of carburetor 24 are coupled directly while being integrated in rotary direction through engagement of engaging recesses 34A, 28A formed at the end section.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for mounting a throttle opening detector to an outboard engine.

When controlling the engine of an outboard motor, etc., it is necessary to accurately detect the throttle opening of the carburetor.

However, since the throttle opening detector is mounted around the engine, it may be affected by engine vibration and may malfunction.

An object of the present invention is to protect a throttle opening degree detector from vibrations occurring in an outboard motor.

In order to achieve the above object, the present invention is such that the housing of the throttle opening detector is fixed to the carburetor body, and the detection axis of the throttle opening detector is directly connected to the throttle axis of the carburetor. .

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an outboard motor 10 to which an embodiment of the present invention is applied, FIG. 2 is a side view showing the main parts of FIG. 1, and FIG. 3 is a front view of FIG. 2. , FIG. 4 is a cross-sectional view taken along the line ■-■ in FIG. 3.

A clamp bracket 12 is fixed to a stern plate 11 of the hull, and a swivel bracket 14 is supported on the clamp bracket 12 via a tilt shaft 13 so as to be tiltable around a horizontal axis. The swivel bracket 14 has a steering shaft 15
is supported rotatably around a vertical axis, and a propulsion unit 18 is supported on the steered shaft 15 via upper and lower support members 16 and 17. An engine 19 is mounted on the top of the propulsion unit 18, and the output of the engine 19 is the same as that of the propulsion unit 1.
The power can be transmitted to the propeller 20 via the drive shaft in 8 and the forward/reverse switching device. t “Oh, the engine 19 is housed within the cowling 21.

The engine 19 is a V-type six-cylinder engine with a 90-degree angle, and the first and second cylinders, the third and fourth cylinders, and the fifth and sixth cylinders each form a V-type. ing. The first and second cylinders, the third and fourth cylinders, and the fifth and sixth cylinders each have an intake manifold 22 (22A).

22B, 22C), and the vaporizer 24 (24A.

24B, 24C) and an intake box 26 are connected.

As shown in FIG. 3, the carburetor 24 supplies air-fuel mixture to the first and second cylinders (third and fourth cylinders, fifth and sixth cylinders) of the engine 19 through separate intake cylinders. It is said to be a 2-there format that makes it possible.

That is, left and right intake passages 27 are formed in the carburetor 24, and each intake passage 27 can be opened and closed by a valley throttle valve 29 fixed to a single throttle shaft 28, respectively.

The carburetor 24 is provided with a throttle opening detector 30 that detects Hli of the throttle valve 29. The throttle opening detector 30 is located at the base 3 as shown in FIG.
1 and the cap part 32; a detection shaft 34 rotatably supported by the base 31 of the housing 33 and penetrating inside and outside the housing 33; and a detection shaft 34 fixed to the inner surface of the cap part 32 of the housing 33. The resistance plate 35 is fixed to the end of the detection shaft 34 located in the housing 33, and is in contact with the resistance plate 35 with a predetermined contact pressure in the axial direction of the detection shaft 34.
The contact point 36 is configured to be able to come into sliding contact with the contact point 36. That is, the throttle opening degree detector 30 is capable of detecting the throttle opening degree using a potentiometer system, and includes a resistance plate 35 of a contact point 36 that rotates together with a detection shaft 34.
The rotation angle position of the detection shaft 340 can be detected by the sliding contact position with respect to the detection shaft 340.

Here, as shown in FIGS. 2 and 3, the housing 33 of the throttle opening degree detector 30 is fixed to the mounting bracket 38 with mounting screws 37, and
is fixed to the carburetor 24 by a mounting screw 39.

Further, as shown in FIG. 4, a throttle opening degree detector 30
The detection shaft 34 of the carburetor 24 and the throttle shaft 28 of the carburetor 24 are integrated in their rotational direction by engagement between an engagement protrusion 34A and an engagement recess 28A formed at the ends of both. It is directly connected in the state.

As shown in FIG. 4, the detection shaft 34 and the throttle shaft 28, which are directly connected, are supported by a mounting bracket 38 via a collar 40 and a resin bushing 41. Color 40 is
The inner diameter part 40A that pivotally supports the detection shaft 34 and the large inner diameter part 40B that pivotally supports the throttle shaft 28 are coaxially arranged, and the axes of the detection shaft 34 and the throttle shaft 28 are aligned. The resin bushing 41 is used to prevent corrosion due to a potential difference between the aluminum mounting bracket 38 and the stainless steel collar 40, and is unnecessary when the collar 40 is made of resin.

In addition, in this outboard motor 10, the spring constant of the elastic material forming the upper and lower support members 16 and 17 is made smaller in the longitudinal direction, and by adjusting the crank torque of the engine 19,
The direction in which the vibration of the engine 19 is large, that is, the main direction, is made to coincide with the longitudinal direction in which the elastic material has a high damping effect. That is, the main direction of vibration of the engine 19 is set in the direction of the center axis of the engine along the propulsion direction of the outboard motor 10, which is indicated by the line XX in FIG. Therefore, in the throttle opening detector 30, the axial direction of the detection shaft 34, which generally has weak vibration resistance, that is, the direction in which the contact 36 contacts the resistance plate 35, is the main direction of vibration occurring in the outboard motor 10. It is supposed to be arranged approximately perpendicular to the

Next, the operation of the above embodiment will be explained.

While the engine 19 is running, the throttle shaft 2 of the carburetor 24
When the date rotates, the detection shaft 34 of the throttle opening detector 30, which is directly connected to the throttle shaft 28, rotates.
1 in 4! ! The rotational angular position of the throttle shaft 28, that is, the throttle opening degree, can be detected by changing the sliding position of the contact 36 with respect to the resistance plate 35.

Therefore, in the embodiment described in -, since both the housing 33 of the throttle opening detector 30 and the detection shaft 340 are connected to the carburetor 24, it is difficult to determine what kind of vibration occurs in the outboard motor 10. Also, the vibration modes of the resistance plate 35 fixed to the housing 33 and the contact 36 fixed to the detection shaft 34 are the same. Therefore, relative movement between the resistance plate 35 and the contact point 36 due to the vibration of the housing 33 and the detection shaft 34 is prevented, and malfunction of the throttle opening detector 30 due to vibration can be prevented.

Further, the throttle opening degree detector 30 is susceptible to vibrations occurring in the axial direction of the detection shaft 34, that is, in the direction in which the contacts 36 contact the resistance plate 35, and is strong against vibrations occurring in the direction perpendicular to the axis of the detection shaft 34. Therefore, the direction in which the throttle opening detector 30 has high vibration resistance corresponds to the direction in which the vibrations generated in the outboard motor 10 are large, that is, the main direction, and the throttle opening detector 30
It is also possible to rationally engage and prevent vibrations.

In the above embodiment, the direct connection between the detection shaft 34 and the throttle shaft 28 is connected by the collar 40, and their axes are made to coincide, so that the detection shaft 34,
Smooth rotation of the throttle shaft 28 is not hindered.

As shown in E above, in the present invention, the housing of the throttle opening detector is fixed to the carburetor main body, and the detection shaft of the throttle opening detector is directly connected to the throttle shaft of the carburetor. Therefore, both the throttle opening detector housing and the detection shaft are connected to the carburetor, and no matter what kind of vibration occurs in the outboard motor, the vibration modes of the housing and detection shaft are the same. . That is, relative movement due to vibration between the housing and the detection shaft is prevented, and malfunction of the detector due to vibration can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, FIG. 2 is a side view showing the main parts of FIG. 1, and FIG. 3 is a front view of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. DESCRIPTION OF SYMBOLS 10... Outboard motor, 19... Engine, 24''... Carburizer, 28''... Throttle shaft, 30-' Throttle opening detector, 33'-° housing, 34... Detection shaft. Agent Patent Attorney Osamu Shiokawa Figure 1

Claims (1)

[Claims] (1) Fix the clamp of the throttle opening detector to the carburetor body, and connect the detection shaft of the throttle opening detector directly to the throttle shaft of the carburetor.Connecting the throttle opening detector to the outboard engine Mounting structure.