JPS6053221A - Coupling - Google Patents

Abstract

PURPOSE:To allow shafts to be firmly connected with each other and rotation to be smoothly transmitted, by integrally forming two ribs which connect connecting members to each other in such a manner as to be axially arranged adjacent to each other through an intermediate member, and crossing at least one rib relative to the other rib about the shafts. CONSTITUTION:A throttle shaft 28 is connected with a detection shaft 34 by a coupling 42. The coupling 42 is formed in such that a first connecting member 43 mounted to the shaft 28 is connected through a rib unit 45 to a second connecting member 44 mounted to the shaft 34, and the whole is formed of a flexible material such as synthetic resin. The rib unit 45 comprises a first rib 46 integrally formed with the first connecting member 43 and a second rib 47 integrally formed with the second connecting member 44. The first and second ribs are formed integrally with each other in such a manner as to be axially arranged adjacent to each other through an intermediate member 48 and be crossed to each other about the shafts.

Description

[Detailed description of the invention] The present invention relates to a joint.

As a joint used when the first shaft and the second shaft are eccentric to each other, the protrusions provided at the ends of both shafts are fitted into mutually perpendicular grooves provided on both the front and back surfaces of the intermediate piece. There is something called an Oldham joint.

However, in the Oldham joint described in 1-1, in order to transmit rotational force smoothly, the grooves provided on both the front and back surfaces of the intermediate piece and the protrusions provided on both shaft ends can be smoothly slid into contact with each other. As a result, a certain degree of play must be present at the contact portion between the groove and the protrusion, making it difficult to accurately transmit the rotation angle between the two shafts.

SUMMARY OF THE INVENTION An object of the present invention is to connect a first shaft and a second shaft that are eccentric to each other without play, and to enable smooth transmission of rotational force.

In order to achieve the above-mentioned eleventh objective, the joint according to the present invention has a first connecting part connected to the first shaft and a second connecting part connected to the second shaft connected by a group of ribs. , each rib group has at least two ribs that are integrated into the first connecting part and the second connecting part, and each rib is integrated with the ribs adjacent to each other in the axial direction via an intermediate body, and At least some of the ribs and other ribs are arranged to intersect around the heel.

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

Fig. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, Fig. 2 is a front view showing the main parts of Fig. 1, and Fig. 3 is a - ■A sectional view along the line, FIG. 4 is a perspective view showing a joint according to an embodiment of the present invention, and FIG.
6 is a sectional view taken along the line Vl--Vl in FIG. 5.

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. Note that the engine 19 is housed within the cowling 21. The engine 19 is a 90-degree banked V-type six-cylinder engine, and the first and second cylinders, the third and fourth cylinders, and the fifth and sixth cylinders each form a V-type. 1st cylinder, 2nd cylinder, 3rd cylinder
Intake manifolds 22 (22A, 22B, 22C) are installed in each of the cylinders and the 4th cylinder, and the 5th and 6th cylinders.
The carburetor 24 (24A, 24B, 24C) and the intake box 26 are connected via the carburetor 24 (24A, 24B, 24C).

As shown in FIG. 2, 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. kn'Q
It is said to be a 2-pore type with T capacity. That is, left and right intake passages 27 are formed in the carburetor 24, and each intake passage 2
7 can be opened and closed by throttle valves 29 each fixed to a single thrower I/L shaft 28.

1-. The carburetor 24 is provided with a throttle opening detector 30 for detecting the opening of the throttle valve 29. As shown in FIG.
3, and a detection shaft 3 rotatably supported by the base 31 of the housing 33 and penetrating inside and outside the housing 33.
4 and a resistor @35 fixed to the inner surface of the cap portion 32 of the housing 33, and a resistor @35 fixed to the end of the detection shaft 34 located inside the housing 33 and fixed to the resistance plate 35 in the axial direction of the detection shaft 34. The contact point 36 is capable of slidingly contacting the resistance plate 35 in a state of contacting with a contact pressure of . That is, the throttle opening degree detector 30 is capable of detecting the throttle opening degree using a potentiometer system, and includes a contact point 36 that rotates together with a detection shaft 34.
The rotation angle position of the detection shaft 34 can be detected by the sliding contact position of the detection shaft 34 with respect to the resistance plate 35.

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.

Note that the detection shaft 34 is pivotally supported by a mounting bracket 38 via a collar 40 and a resin bushing 41.

Here, the throttle shaft 28 and the detection shaft 34 correspond to a first shaft and a second shaft in the end 1j1, respectively, and are connected by a joint 42 shown in FIGS. 4 to 6.

The joint 42 is the first joint to which the throttle shaft 28 is attached without play.
The connecting part 43 and the second connecting part 44 to which the detection shaft 34 is attached without play are connected by a rib group 45, and the whole is made of a flexible material such as synthetic resin. . The rib group 45 consists of a first rib 46 that is integrated with the first connecting portion 43 and a second rib 47 that is integrated with the second connecting portion 44, and the first rib 46 and the second rib 47 are an intermediate body. 48
They are integrated adjacent to each other in the axial direction via the axial direction, and are arranged perpendicularly around the axis. That is, in this joint 42, each rib 46, 47 is easily bent in a direction perpendicular to their longitudinal direction, and the bending rigidity of the rib group 45 is small, that is, it is flexible. Note that the torsional rigidity of the rib group 45 in this joint 42 is high. Also, each axis 2
8.34 and each connecting portion 43.44 of the joint 42 are pins 50 inserted into bottle holes 49 provided in each connecting portion 43.44.
are integrated in the rotational direction.

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

While the engine 19 is running, the throttle shaft 2 of the carburetor 24
8 rotates, the detection shaft 34 of the throttle opening detector 30 which is directly connected to the throttle shaft 28 via the joint 42
rotates, and the sliding contact position of the contact 36 fixed to the detection shaft 34 with respect to the resistance plate 35 changes, so that the throttle shaft 2
It becomes possible to detect the rotation angle position of 8, that is, the throttle opening.

Therefore, in the above embodiment, even if the throttle shaft 28 and the detection shaft 34 are eccentric with respect to each other, the entire joint 42 is integrated, and the rib group 45
can be easily deflected in the direction perpendicular to the longitudinal direction of each rib 46, 47, so the eccentricity of both shafts 28, 34 is absorbed by the deflection of the rib group 45, and both shafts 28.
．． 34 can be connected without play and rotational force can be transmitted smoothly.

In addition, in the joint 42, the first rib 46 and the second rib 47 of the rib group 45 are arranged orthogonally, so that the deflection of the rib group 45 that absorbs the deviation between the throttle shaft 28 and the detection axis 34 is approximately equal to that around the axis. The surface is smoothed, and rotational force can be transmitted more smoothly. However, in the present invention, the ribs constituting the rib group are not necessarily arranged orthogonally, but may be arranged crosswise across the width.

7 and 8 show a joint 4 according to another embodiment of the present invention.
2A, this joint 42A is an explanatory diagram showing the joint 42A.
The difference from 2 is that the rib group 45A includes intermediate ribs 51 and 52 between the first rib 46 integrated with the first connecting part 43 and the second rib 47 integrated with the second connecting part 44. The ribs 46, 47, 51, 52 are arranged intersecting each other. According to this joint 42A, the first shaft and the second
The bending rigidity of the rib group 45A, which absorbs the deviation from the axis of It is also possible to transmit rotational force more smoothly.

In each of the above embodiments, a case has been described in which all the ribs constituting the rib group are arranged to intersect with each other. However, in the present invention, at least some of the ribs constituting the rib group and other ribs may be arranged to intersect around the axis.

As described above, the joint according to the present invention is formed by connecting the first connecting part connected to the first shaft and the second connecting part connected to the second shaft by a group of ribs, and the rib group is Each has at least two ribs integrated into the first connecting part and the second connecting part, and each rib is integrated in a state adjacent to each other in the axial direction via an intermediate body, and at least a part of the ribs is integrated with the first connecting part and the second connecting part. Ribs and other ribs are arranged to intersect around an axis. Therefore, even if the first axis and the second axis are eccentric with respect to each other, the first connecting part, the second connecting part, and the entire rib group are integrated, and the rib group is aligned with the longitudinal direction of each rib. easily deflects in the direction perpendicular to the direction of IIT
This makes it possible to absorb the eccentricity of both shafts by the deflection of the rib group, connect both shafts without play, and smoothly transmit rotational force.

[Brief explanation of drawings]

Fig. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, Fig. 2 is a front view showing the main parts of Fig. 1, and Fig. 3 is a - ■A sectional view along the line, FIG. 4 is a perspective view showing a joint according to an embodiment of the present invention, and FIG.
6 is a sectional view taken along line VI-VI in FIG. 5, FIG. 7 is a perspective view showing a joint according to another embodiment of the present invention, and FIG. 8 is a side view of FIG. 7. It is a diagram. 28... Throttle axis, 34... Detection axis, 42.4
2A...Joint, 43...First connecting portion, 44...Second connecting portion, 45.45A...Rib group, 46.47.5
1.52...rib, 48...intermediate. Agent Patent Attorney fil Shuji Kawa

Claims (1)

[Claims] (1) In the joint connecting the first shaft and the second shaft,
A first connecting portion connected to the first shaft and a second connecting portion connected to the second shaft are connected by a rib group, and the rib groups are connected to the first connecting portion and the second connecting portion, respectively. At least two ribs are integrated, each rib is integrated adjacent to each other in the axial direction via an intermediate body, and at least some of the ribs and other ribs are arranged to intersect around the axis. A fitting characterized by: