JPH09267796A - Jet propulsion nozzle driving device for small ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily disposed the receiving hole of a detent mechanism in a small ship having a nozzle driving device capable of adjusting the trim angle of a jet propulsion nozzle. SOLUTION: A detent mechanism 36 is provided in a steering handle. The detent mechanism 36 includes a plurality of balls 71 and 72 provided in a base member 31 and receiving holes 81 to 83 formed integrally with a pulley 34 in a detent body 74 side. When the pulley 34 is in a neutral position, one ball 71 is fitted in the receiving hole 82. When a grip is rotated in a first direction and a position is changed to an up side, the other ball 72 is fitted in the receiving hole 83. Further, when the grip is reverse by rotated in a second direction and a position is changed to a down side, the other ball 72 is fitted in the receiving hole 84.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle drive device for adjusting the vertical swing angle of a jet propulsion nozzle of a small boat called a watercraft.

[0002]

2. Description of the Related Art The jet propulsion nozzle of a watercraft is designed to eject water pressurized by a pump to the rear of the hull. The vertical angle (trim angle) of the jet propulsion nozzle greatly affects the maneuverability. To do. BACKGROUND ART Conventionally, there is known a nozzle drive device capable of changing a trim angle of a jet propulsion nozzle in accordance with a marine vessel maneuvering condition such as starting, turning, or riding two people.

The conventional nozzle driving device is roughly classified into an electric type and a mechanical type (manual type). The electric drive device changes the trim angle of the jet propulsion nozzle by an electric motor. On the other hand, as illustrated in FIG. 10, the manual drive device rotates the grip 1 provided on the steering bar handle of the watercraft to rotate the pulley 2 and operate the cable 3. The jet propulsion nozzle 4 moves up or down depending on the operation amount and operation direction of the cable 3. The mechanical type is superior to the electric type in terms of good responsiveness during operation and cost.

The nozzle 4 can change its inclination in at least three steps. That is,
Neutral position (NEUTRAL) and up position (UP)
There are three types of down position (DOWN). In addition, since a restoring force (reaction force) is applied to the nozzle 4 by the thrust of water jetting during maneuvering, a lock mechanism 5 is provided to hold the nozzle 4 at a desired position. The lock mechanism 5 includes a release button 6 provided on the grip 1 side,
The release button 6 is provided with a fitting groove 7 that can be engaged and disengaged, and when the release button 6 is operated in the direction of arrow A (release direction) in FIG.
By disengaging a from the fitting groove 7, the grip 1 can be rotated up or down.

However, the lock mechanism 5 having the above structure is
When the grip 1 is rotated while the release button 6 is operated in the release direction, for example, when the up or down position is switched to the neutral position, no sense of motion can be obtained, so it is difficult to understand that the position has been switched. Sometimes. For this reason, it is desirable to provide a detent mechanism that gives a feeling of node movement when the grip 1 is switched to each position.

As the detent mechanism, a ball urged by a spring is provided on one side of the mutually facing surfaces of the fixed side base member 8 and the rotating side pulley 2, and the ball is provided on the other side. It is conceivable to form as many receiving holes that can be fitted as many as the number of positions. With such a detent mechanism, when the grip is rotated, the ball enters the receiving hole at the moment when it reaches the desired position, a feeling of motion is generated, and the rotation resistance of the grip increases, so the position is switched. It is possible to know what has passed by the feel of the hand.

[0007]

Since the detent mechanism using the ball and the receiving hole as described above requires the number of receiving holes corresponding to the number of positions, the receiving holes should be provided near the center of rotation of the grip. Then, the pitch between the receiving holes becomes narrow, and it becomes difficult to arrange the receiving holes depending on the number of the receiving holes. Moreover, since the grip can be rotated while being held with one hand, it is relatively narrow, for example, around 90 °, so if all the receiving holes are arranged in this narrow angle range, the pitch of the receiving holes becomes extremely narrow, The edge of the receiving hole becomes a weak point in terms of strength.

Therefore, an object of the present invention is to reduce the number of receiving holes of the detent mechanism to less than the number of positions,
It is an object of the present invention to provide a mechanical (manual) jet propulsion nozzle drive device in which receiving holes can be arranged without difficulty.

[0009]

SUMMARY OF THE INVENTION A jet propulsion nozzle drive device of the present invention developed to achieve the above object includes a cable for driving force transmission capable of operating the jet propulsion nozzle up or down and steering. A grip mounted rotatably relative to a base member provided on a handle for a vehicle, and rotating the nozzle in the first direction when it rotates integrally with the grip and at the neutral position as a boundary, and moves the nozzle upward. A rotating body that drives the cable in a direction and moves the nozzle in a direction in which the nozzle moves to the down side when the cable rotates in a second direction, and the grip has an up-side position and a down-side position (neutral position). A detent mechanism that produces a feeling of nodal motion when positioned at a position including the member on the rotating body side and the base portion. A plurality of engaging elements provided on one side of the mutually opposing surfaces and urged toward the other side by a spring, and the rotating body provided on the other side of the mutually opposing surfaces and in the neutral position. When the rotary body rotates in the first direction and the position is switched to the up side, the specific engagement element has a receiving hole into which the specific engagement element fits. Has a receiving hole into which an engaging member different from the above is fitted, and when the rotating body rotates in the second direction and the position is switched to the down side, the engaging member different from the specific engaging member is fitted. And a detent body having a matching receiving hole.

When the grip is in the neutral position, a specific one of the plurality of engaging elements is fitted in a predetermined receiving hole. At the moment when the jet propulsion nozzle is switched to the up side by rotating the grip from this neutral position to the up side, the other engaging element is fitted into a receiving hole different from that at the neutral position, so that the grip rotation resistance is increased. As the number increases, a feeling of movement is obtained. Even when the nozzle is switched to the down side by rotating the grip to the down side, the other engaging element fits into the receiving hole different from the neutral position, so that a feeling of motion can be obtained. Also, when the grip is rotated from the up side to the down side or from the down side to the up side, the engaging element fits into the receiving hole at the moment when the grip reaches the neutral position, so that the rotation resistance of the grip is temporarily reduced. And a sense of movement is obtained.

Such a detent mechanism requires fewer receiving holes than the number of positions that can be switched, allows all the receiving holes to be reasonably arranged within a limited angle range, and the hole-to-hole pitch can be reduced. Can be big. Therefore, even if there are many positions or if it is necessary to arrange the receiving hole near the center of rotation of the grip, it is possible to arrange the receiving hole without difficulty, which contributes to downsizing of the detent mechanism. Since the wall thickness between the receiving holes can be increased, sufficient strength can be obtained at the edges of the receiving holes.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. The jet propulsion nozzle 10 shown in FIG. 2 is provided at the rear of the hull of a small boat (watercraft) not shown. This nozzle 10
Is swingable in the vertical direction about the shaft 11, and is mechanically (manually) operated by a nozzle drive device 12 in two stages on the up side (UP) with respect to the neutral position (NEUTRAL) in the vertical direction.
The trim angle can be adjusted in two steps on the DOWN side.

The nozzle driving device 12 is provided with an operating portion 20 provided on a steering bar handle of a watercraft, a relay device 21 provided on the hull side, and the like. The operation unit 20 and the repeater 21 include a first cable 22 and a second cable 22 for transmitting the driving force.
It is connected by a cable 23. The repeater 21 and the jet propulsion nozzle 10 are connected by a push-pull cable 24, and when the first cable 22 is pulled by the operation unit 20, the push-pull cable 24 is pulled to drive the nozzle 10 to the up side. The operation unit 20
When the second cable 23 is pulled by the push-pull cable 24, the push-pull cable 24 is pushed to move the nozzle 10 to the down side.

As shown in FIGS. 3 and 4, the operating section 20 is a base member 31 fixed to the shaft 30 side of the steering bar handle, and a guide provided so as to be rotatable relative to the shaft 30 about its axis. A tube 32, a grip 33 for rotation operation fixed to the guide tube 32,
A pulley 34 as a rotating body that rotates integrally with the guide tube 32, a lock mechanism 35 and a detent mechanism 36 that regulate the rotational position of the grip 33, and the like are provided.
In the illustrated base member 31, the first member 31a located on the lower side and the second member 31b located on the upper side in FIG. 4 are connected to each other by screws 37 and 38, and the shaft 30 passes through the base member 31. A hole 39 is formed. A cable lead-out portion 40 is provided below the base member 31.

A terminal 22a of the first cable 22 (shown in FIG. 1) and a terminal 23a of the second cable 23 are fixed to the outer peripheral portion of the pulley 34 functioning as a rotating body. Portions of the cables 22 and 23 near the terminals 22a and 23a are wound around the grooves of the pulley 34.
1, when the first cable 22 is wound around the pulley 34 when it is rotated clockwise, the first cable 22 is pulled, and when the pulley 34 is rotated counterclockwise, the second cable 22 is pulled. The second cable 23 is pulled by winding 23 around the pulley 34. These cables 22 and 23 are drawn out of the base member 31 from the cable lead-out portion 40. The cables 22 and 23 are covered with cover tubes 41 and 42.

More specifically, when the pulley 34 is in the neutral position (N) in FIG. 1, the first cable 22 and the second cable 23 are wound around the pulley 34 by substantially the same amount, and both cables 22 are wound. , 23 are in the neutral position, the push-pull cable 24 is also in the neutral position, and thus the jet propulsion nozzle 10 is in the neutral position. When the pulley 34 is rotated to the position (UP1) in FIG. 1, the first cable 22 is pulled by a predetermined stroke, so that the jet propulsion nozzle 10 moves to the up position 1
It goes up to (UP1). Further, the pulley 34 is (U
When rotated to P2), the jet propulsion nozzle 10 is elevated to the up position 2 (UP2) by further pulling the first cable 22.

On the contrary, the pulley 34 is (DOWN1) in FIG.
When the second cable 23 is pulled by a predetermined stroke when it is rotated to the position, the jet propulsion nozzle 10 descends to the down position 1 (DOWN1). When the pulley 34 further rotates to (DOWN2) in FIG. 1, the second cable 23 is further pulled so that the jet propulsion nozzle 10 moves to the down position 2 (DO).
It is designed to descend to WN2).

The lock mechanism 35 shown in FIG. 3 comprises a release button 50 and a receiving portion 52 having a receiving groove 51 with which a part 50a of the release button 50 can be engaged. The release button 50 is rotatable around a shaft 53. As shown in FIGS. 3 and 7, the release button 50 is a molded product including a button body 54 made of synthetic resin, and a metal lock plate core metal 55 inserted when the button body 54 is molded. . The thickness T1 of the lock plate core metal 55 is less than half the thickness T2 of the button body 54, but the metal lock plate core metal 55 has sufficient strength and wear resistance in the thickness direction and the like.

As shown in FIG. 6, the receiving portion 52 has five receiving grooves 51 formed in the base member 31, and ribs 57 are formed between the receiving grooves 51. These receiving grooves 51 are formed at positions where the engaging portions 50a of the lock plate core metal 55 can be engaged with each other regardless of the position of the grip 33 among the above-mentioned five types of positions. 3 is engaged with any one of the receiving grooves 51, the ribs 57 prevent the grip 33 from rotating, and the release button 50 moves in the direction of arrow A in FIG.
When operated in the direction (release direction), the lock plate core 55 disengages from the receiving groove 51 so that the grip 33 can rotate. Release button 5
Zero is biased by a torsion spring 58 in a direction to engage with the receiving groove 51.

In the case of this embodiment, a metal lock plate core metal 55 having high strength is attached to a button body 54 made of synthetic resin.
Is inserted, and the engaging portion 50 with the receiving groove 51 is inserted.
Since the thickness T1 of a can be made as thin as possible, the rib 57 between the receiving grooves 51 can be formed even if the number of positions is larger than in the conventional case.
Can be made thicker, and the receiving portion 52 can have sufficient strength.

Further, a mark 60 is provided on the grip 33, and a position display (not shown) is provided on the base member 31 side at a position corresponding to each position of the grip 33. It is possible to visually confirm where the vehicle is located among the five types of positions.

On the other hand, the detent mechanism 36 is constructed as described below. The detent mechanism 36 includes two balls 71 and 72 that function as engaging elements and a pulley 3
4 and a detent body 74 provided at the end of No. 4. The balls 71 and 72 are accommodated in ball accommodating holes 76 and 77 formed in the base member 31, and are biased by springs 78 and 79 in the direction of exiting from the ball accommodating holes 76 and 77. Instead of the balls 71, 72, the shape of the engaging element is not limited, for example, a plunger type engaging element having a rounded tip may be used.

A center hole 80 through which the shaft 30 passes is formed in the center of the detent body 74, and four receiving holes 81, 82, 83, 84 are formed on the same circumference centered on the center hole 80. Are formed. In the case of this embodiment, all the receiving holes 81 to 84 are arranged at the same hole pitch P2 (45 °). The pitch P1 of the balls 71, 72 is 1.5 times (67.5 °) the pitch P2 between holes.

As shown in a part of the detent mechanism 36 in FIG. 5, the detent body 74 includes a body main body 90 made of synthetic resin and stainless steel having a thickness of 1 mm or less attached to an end surface of the body main body 90. A surface plate 91 made of a metal such as steel, the surface plate 91 having circular holes as the receiving holes 81 to 84, and the body body 90 into which the balls 71 and 72 can be fitted. The hollow 92 is formed. By providing the surface plate 91 on the resin main body portion 90, the strength of the contact surface with the balls 71 and 72, especially the edges of the receiving holes 81 to 84, can be increased. Such a surface plate 91 works effectively as a means for reinforcing the detent body 74 even if the thickness is considerably small.

Next, the operation of the nozzle driving device 12 having the detent mechanism 36 having the above structure will be described. When the pulley 34 is in the neutral position (N) shown in FIG. 1, that is, when the nozzle 10 is in the neutral position (NEUTRAL), the first ball 71 is fitted in the second receiving hole 82. In this state, press the release button 50 in the direction of arrow A in FIG. 3,
When the grip 33 is rotated to the position (UP1) in FIG. 1, the first cable 22 is pulled and the push-pull cable 24 is pulled, so that the nozzle 10 moves to the up position 1 (UP1), and In the detent mechanism 36, the second ball 72 has the third receiving hole 83.
It is understood that the position is switched to UP1 due to the feel of the hand, because the rotational resistance of the grip 33 increases and a feeling of nodulation occurs at that moment.

When the grip 33 is further rotated to the position (UP2) in FIG. 1, the angle of the nozzle 10 is switched to the up position 2 (UP2), and this time the first ball 71 is moved to the first receiving hole 81. To fit. At this time as well, a feeling of nodal motion is generated, so it can be seen that switching to UP2 has been made.

Contrary to the above, the grip 33 is shown in FIG.
When rotated to the position indicated by OWN1), the nozzle 10 moves to the down position 1 (DOWN1) and the second ball 72 fits into the fourth receiving hole 84. At this time as well, a feeling of nodal motion is generated, so it can be seen that the mode is switched to DOWN1. When the grip 33 is further rotated to the (DOWN2) position, the angle of the nozzle 10 is switched to the down position 2 (DOWN2), and the first ball 71 is fitted into the third receiving hole 83 this time. At this time as well, a feeling of nodal motion is generated, so it can be seen that the mode is switched to DOWN2.

In the case of the detent mechanism 36 of this embodiment, since the turning range of the grip 33 is 45 ° on the up side and 45 ° on the down side, for a total of 90 °, the wrist is moved while holding the grip 33 with one hand. By doing so, the above-mentioned five types of positions can be sequentially switched. In this case, the number of the receiving holes 81 to 84 may be four, and the receiving holes 81 to 84 can be arranged in an angle range (P2 × 3 = 135 °) wider than the rotation range (90 °) of the grip 33.

FIG. 8 shows a second embodiment of the present invention. This embodiment is common with the first embodiment in that two balls 71, 72 and four receiving holes 81-84 are provided, but as shown in FIG. The pitch P3 between the third receiving hole 83 and the fourth receiving hole 84 (52.5
(°) is made larger than the pitch P2 (45 °) of the other receiving holes 81, 82. In this case, the grip rotation angle when switching from the neutral position (N) to the down position (DOWN) is 30 °, and the grip rotation angle 2 of the first embodiment is 2.
It can be larger than 2.5 °. The grip rotation angle on the up side is 22.5 ° for both UP1 and UP2, which is the same as in the first embodiment. Therefore, the total grip rotation angle in FIG. 8 is 75 °. Thus, by appropriately changing the pitch of the receiving holes 81 to 84, the grip rotation angle can be changed between the up side and the down side.

FIG. 9 shows a third embodiment of the present invention. In this embodiment, three balls 71, 72, 73
And three holes 81, 82, 83 are provided. Holes 81-
The pitch P2 of 83 is 45 ° and the pitch P3 of the balls 71 to 73 is 67.5 °. In this case, the pulley 34 is shown in FIG.
When rotated to the position (UP1), the jet propulsion nozzle 10 moves to the up position 1 (UP1) and the second ball 72 fits into the third receiving hole 83, which causes a feeling of nodal motion and switches to UP1. You can see that it passed. When the pulley 34 further rotates to the (UP2) position, the nozzle 10 is switched to the up position 2 (UP2), and the first ball 71 is fitted into the first receiving hole 81 this time. At this time as well, a feeling of nodal motion is generated, so it can be seen that switching to UP2 has been made.

Contrary to the above, the pulley 34 (DO
When the nozzle 10 is rotated to the position (WN1), the nozzle 10 descends to the down position 1 (DOWN1), the third ball 73 fits into the first receiving hole 81, and a switching feeling is generated, so that the nozzle is switched to DOWN1. I understand. When the pulley 34 further rotates to the (DOWN2) position, the nozzle 10 switches to the down position 2 (DOWN2), and the first ball 71 fits into the third receiving hole 83 this time. At this time as well, a feeling of nodal motion is generated, so it can be seen that the mode is switched to DOWN2.

In the case of this embodiment, three receiving holes 8 are provided.
Since only 1 to 83 can correspond to 5 positions, it becomes easier to arrange the receiving holes 81 to 83. Also,
Since the balls 71 to 73 can be arranged in a wider area than the receiving holes 81 to 83, it is easy to secure a space for providing the three balls 71 to 73.

In each of the above embodiments, the base member 3 is used.
Although the balls 71 to 73 are provided on the first side and the receiving holes 81 to 84 are provided on the pulley 34 side, in implementing the present invention, the balls 71 to 73 are provided on the pulley 34 side and the base member 31 side is provided. You may make it provide the receiving holes 81-84.

[0034]

According to the present invention, the number of receiving holes can be made smaller than the number of selectable positions, and even if the number of positions is large, the pitch of the receiving holes can be made relatively large, and the receiving holes can be formed. It can be arranged without difficulty and the strength of the edge of the receiving hole can be sufficiently secured.

[Brief description of drawings]

FIG. 1 is a front view showing a relationship between a ball and a receiving hole of a detent mechanism according to a first embodiment of the present invention.

FIG. 2 is a plan view of a nozzle driving device including the detent mechanism shown in FIG.

FIG. 3 is a vertical cross-sectional view of an operation unit of the nozzle drive device shown in FIG.

FIG. 4 is a cross-sectional view of the operation unit shown in FIG.

5 is a sectional view of a part of the detent mechanism of the operation unit shown in FIG.

6 is a front view of the base member of the operation unit shown in FIG. 3 viewed from the back side.

FIG. 7 is a plan view of a release button of the operation unit shown in FIG.

FIG. 8 is a front view showing the relationship between balls and receiving holes of the detent mechanism according to the second embodiment of the present invention.

FIG. 9 is a front view showing the relationship between balls and receiving holes of the detent mechanism according to the third embodiment of the present invention.

FIG. 10 is a sectional view of an operating portion of a conventional nozzle driving device.

11 is a front view of a part of the lock mechanism of the operation unit shown in FIG.

[Explanation of symbols]

 10 ... Jet propulsion nozzle 12 ... Nozzle drive device 22, 23, 24 ... Cable 31 ... Base member 33 ... Grip 34 ... Pulley (rotating body) 35 ... Lock mechanism 36 ... Detent mechanism 50 ... Release button 71, 72, 73 ... Ball (Engager) 74 ... Detent body 78, 79 ... Spring 81, 82, 83, 84 ... Receiving hole

Claims (3)

[Claims] 1. A small vessel having a jet propulsion nozzle that can be swung up and down at the rear of the hull, and a cable for driving force transmission that can operate the jet propulsion nozzle up or down, and steering. A grip mounted to a base member provided on a handle for the vehicle so as to be rotatable relative to the base member, and the nozzle moves upward when the grip rotates integrally with the grip and is rotated in a first direction with a neutral position as a boundary. And a rotating body that drives the cable in a direction that drives the cable in a direction and moves the nozzle to a down side when the cable rotates in a second direction, and the grip has an up-side position and a down-side position (neutral position). And a detent mechanism that produces a feeling of nodal motion when positioned at a position including the member on the rotating body side and the base member. A plurality of engaging elements provided on one side of the surface facing each other and biased toward the other side by a spring, and the rotating body provided on the other side of the mutual facing surface in the neutral position. Has a receiving hole into which a specific one of the plurality of engaging elements is fitted, and the rotating body is the first
Has a receiving hole into which an engaging member different from the specific engaging member fits when the position is switched to the up side by rotating the rotating body in the second direction and the rotating body rotates in the second direction. And a detent body having a receiving hole into which an engaging member other than the specific engaging member fits when the switch is switched to the down side. 2. The detent body includes a body main body made of synthetic resin and a metal surface plate attached to an end surface of the body main body, and the surface plate has a circular shape as the receiving hole. 2. A jet propulsion for a small boat according to claim 1, wherein a hole is formed and a spherical recess into which the engaging element can be fitted is formed in the body main body portion at a position corresponding to the circular hole. Nozzle drive device. 3. A lock mechanism for locking the grip in each position, the lock mechanism being formed on the grip and a release button formed on the base member when the grip is in each position. The release button includes a detent receiving groove arranged at a position where the release button engages, and a spring for urging the release button in a direction to engage the release button, and the release button is made of synthetic resin. A button main body and a metal lock plate core metal molded into the button main body and thinner than the thickness of the button main body, and a part of the lock plate core metal is inserted into the receiving groove. The jet propulsion nozzle drive device for a small vessel according to claim 1.