JPS5926515B2 - ship propulsion system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention generally relates to a starting mechanism for an internal combustion engine, such as a marine propulsion system, having a reversing transmission.

In the past, it was sometimes possible to start the engine while the transmission was in gear.

Starting the engine in such a state is undesirable for various reasons, including the possibility that the ship supporting the ship's propulsion device may list abruptly.

A device is described in U.S. Pat. No. 2,997,996, issued Aug. 29, 1961, which prevents the engine from starting when the reversing transmission is in gear.

The present invention is similar to such a device, and is a device for use in ships in which the engine cannot be started when the transmission is in gear, i.e., the engine can only be started when the transmission is in neutral. This relates to propulsion devices.

That is, the present invention provides a propulsion system for a ship that includes an engine having a starting gear, a transmission device that can be switched between a neutral state and a driving state, and a starting device.
The starter includes a rotatable shaft; a starter pinion supported on the shaft for rotation and axial movement with respect to the shaft; a pin provided on the shaft and the starter pinion; and a pin provided on the shaft and the starter pinion. combination means with a slot for receiving the slot, the slot having a spiral slot portion and a recessed portion adjacent one end of the slot portion;
Only when the transmission is in a neutral state does the pin move from the lockout position, in which the pin is received in the recessed portion, to prevent relative movement between the shaft and the starting pinion. A receptacle is received in one end of the spiral slot portion adjacent the portion so that rotation of the shaft causes the starter pinion to move axially and further engage the starter pinion and the starter gear. the starting pinion rotates with the shaft as the shaft rotates, and means for moving the pin to an intermediate position in which the engine can be started; When in the lockout position, the pin is in the lockout position to prevent relative movement between the shaft and the starting pinion, preventing axial movement of the starting pinion, thereby preventing the starting pinion from moving in the axial direction. To provide a propulsion device for a ship, which prevents meshing of the starting gear and the starting gear.

In one preferred embodiment of the invention, means for selectively moving the starting pinion into its engaged position or preventing movement of the starting pinion into its engaged position comprises a It consists of a drive pin provided on one of the starting pinions, and a slot provided on the other of the shaft and the starting pinion.

The slot is for receiving the drive pin and includes a spiral slot portion and a recess portion axially adjacent to one end of the spiral slot portion.

Therefore, even if the starting shaft rotates while the drive pin is received in the recessed portion, there is no relative movement between the starting shaft and the starting pinion, and both rotate together. Only.

This prevents the starting shaft from moving in the axial direction and prevents the starting pinion from meshing with the starting gear.

On the other hand, if the starter shaft rotates while the drive pin is received in one end of the spiral slot, the rotation of the starter pinion with respect to the starter shaft is subject to frictional resistance. It moves axially with respect to the starting shaft and reaches a position where it meshes with the starting gear.

Further rotation of the starter shaft causes the starter pinion to rotate with it, thereby starting the engine.

More specifically, in a preferred embodiment of the invention, the starter shaft includes an axial bore and a linkage operable within the bore.

This hole and linkage allows the starter pinion to move relative to the starter shaft, thereby placing the drive pin in either the recessed portion or the spirally slotted portion.

The linkage has a first or lockout position in which the drive pin is received in the recessed portion and a second or neutral position in which the drive pin is received in one end of the spiral slot portion. and a pusher rod movable axially within the bore of the starting shaft.

The linkage further includes means for coupling the push rod to the starter pinion so that the starter pinion moves in accordance with the movement of the push rod, and means for moving the push rod within the bore of the starter shaft. .

In a preferred embodiment of the invention, the means include a second push rod positioned within the bore of the starter shaft to engage the first push rod; and means for axial movement within the hole.

Therefore, it is possible to move the first push rod in the axial direction in response to the movement of the second push rod in the axial direction while allowing rotational movement between the first and second push rods. It is possible.

In a preferred embodiment of the invention, the means for axially moving the second push rod within the bore of the starting shaft includes a pivotably mounted control shaft and a link between the second push rod and the control shaft. and a link member adapted to move a second push rod pivotally connected within the bore of the starter shaft in response to rocking of the control shaft.

Furthermore, in one embodiment of the invention, the control shaft comprises a control shaft for a reversing transmission, and each component is such that when the reversing transmission is switched to the driving state, the drive pin is activated. The push rod is disposed in a lockout position located in a recessed portion of the starting pinion, and is arranged to move the push rod to prevent the starting pinion from moving into a position of engagement with the starting gear.

The linkage is arranged such that when the reversing transmission is in a neutral state due to movement of the control shaft, the first or upper push rod, the starting pinion, etc. and positioning the second or lower push rod.

At this time, when the starter shaft rotates in the correct direction, the starter pinion moves to a position where it engages with the starter gear in response.

The present invention also provides a starting mechanism drivably connected to the engine and having the various features described above.

One principal object of the present invention is a pin and slot combination means provided in each of a starting shaft and a starting pinion supported on the starting shaft, the relative In response to the rotation of the starting shaft in one predetermined direction, the starting pinion is moved to a position where it engages with the starting gear. It is an object of the present invention to provide a starting mechanism comprising combination means for selectively assuming either a state that prevents the pinion from moving into a position in which it engages a starting gear.

Another main object of the present invention is to move the starting pinion into a position where it engages the engine starting gear depending on the condition of the reversing transmission, or to prevent the starting pinion from making such a movement. The object of the present invention is to provide a starting mechanism of the type described above.

Furthermore, one main object of the present invention is to provide a propulsion system for a ship, which includes a starting mechanism having the various features described above, such that the engine can only be started when the reversing transmission is in the neutral position. The goal is to provide the following.

It is further an object of the present invention to provide a link mechanism operating in a bore of the starting shaft that allows the starting mechanism to be started only when the reversing transmission is in the neutral condition, and to enable the starting mechanism to be started only when the reversing transmission is in the driven condition. An object of the present invention is to provide a propulsion device for a ship, which prevents starting of a ship.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a ship propulsion device according to the present invention will be described in detail based on the drawings.

The accompanying drawings show a marine propulsion system in the form of an outboard motor 11, which can take various forms and which incorporates various features of the invention.

The outboard motor 11 includes a propulsion section 13 consisting of a power head 17 and a lower unit 21.

The power head 17 has a starting or flyhole gear 27
The engine block 23 containing the
It includes a starter or starting mechanism 29 mounted on the block and adapted to engage the starting gear and rotate the engine to start it.

The lower unit 21 includes a clutch or reversing transmission 33 that rotatably supports the propeller 31 and can be switched between a neutral state and a forward drive state or a reverse drive state, and this part is normally submerged in water.

The transmission 33 is actuated by a control rod 37 which extends vertically within the lower unit 21 and has a lower end connected to the reversing transmission 33 and an upper end extending into the vicinity of the engine block 23.

The control rod 37 is pivotally connected at its upper end to the outer end of a lever 39 which is mounted on a portion of a suitably rotatably supported switching control shaft 41.

The control shaft 41 has one end connected to a power head cover 43.
The transmission 33 extends outwardly and is actuated, ie, swung, by the transmission 33 either manually or by a remote device connected to the transmission.

The structures described above are prior art and well known in the art.

The starting mechanism 29 includes a support bracket 47 connected to the engine block 23 and having a vertically extending hole 49 that supports a starting mechanism drive shaft 51.

A starting pinion 53 is supported on drive shaft 51 for rotational and axial movement relative thereto.

This pinion 53, according to the invention, has a first or engaged position in which it meshes with the starting gear 27, a second or intermediate position (FIG. 3) and a third or lockout position. It is movable between positions (Fig. 4).

In this intermediate and lockout position, pinion 5
3 is in a state out of mesh with the starting gear 27.

Means is provided for rotating the starting shaft 51 to move the starting pinion 53 from its intermediate position to the engaged position.

In the engaged position, the starting pinion 53 meshes with the starting gear 27, thereby starting the engine.

Various types of this device are used, but in the illustrated example, the lower end of the starting shaft 51 is connected to the pulley 5.
7 and around which a tension rope (not shown) is wound.

The upper end of the starting shaft 51 is firmly connected to a mains spring 59 housed in a recess 61 of the support bracket 47 , the other end of which is fixed to the support bracket 47 .

Therefore, when the pull rope is pulled in order to start the engine, the starting shaft 51 first rotates counterclockwise (as seen from the first or pinion end) as shown by arrow 67 in FIG. Wrap it tightly.

The unwinding force of spring 59 then causes starter shaft 51 to rotate clockwise as indicated by arrow 63 in FIG.

Other types of devices may also be used to rotate the starter shaft 51 within the scope of the invention.

According to the present invention, the starting pinion 53 is prevented from moving from that position (FIG. 4) to the engaged position even if the starting shaft 51 is rotating counterclockwise when the starting pinion 5 is in the no-out position. and starting pinion 5
In order to move the starting pinion 53 from the intermediate position (FIG. 3) to the engaged position in response to the counterclockwise rotation of the starting shaft 51 when the starting shaft 51 and the starting pinion 53 are in the intermediate position, Each pinion 53 is provided with a selectively cooperating device.

Although they can take on a variety of forms, in the illustrated example there are respective axially extending recessed portions 7 positioned diametrically opposite the starting pinion 53.
3 and a spiral slot portion 71 extending axially inclined from the lower end of the recessed portion 73 in the circumferential direction, and extending diametrically of the starting shaft 51 at both ends thereof. The starting shaft 51 is provided with a drive pin 79 whose portion is received in the slot 71 .

The cooperating device may also be formed by a slot and a drive pin with one end received in the slot, or a slot in the starting shaft and a pin extending from the starting pinion into the slot. It is also within the scope of the present invention to accommodate and form it.

When the starting pinion 53 is positioned in the aforementioned lockout position (FIG. 4), the drive pin 79 is positioned at the upper end of the axially extending recessed portion 73, so that when the starting shaft 51 rotates, The starting pinion 53 rotates with this shaft in either rotational direction and does not move the starting pinion 531 axially toward the engaged position.

However, if the starting pinion 53 is in the intermediate position (FIG. 3), 1. The drive pin 79 is located at the upper end of the spiral slot portion 7T.

Then, when the starter shaft 51 rotates counterclockwise, the starter pinion 53 is moved from the intermediate position (FIG. 3) to the engaged position, thereby starting rotation of the engine.

Rotating the starting shaft 51 in the opposite direction, ie clockwise, simply causes the starting pinion 53 to rotate together with the starting shaft 51.

When the drive pin 79 is located in the spiral slot portion 77 of the slot 71 and the starter shaft 51 is rotated counterclockwise, the starter pinion 53 is moved from the intermediate position (FIG. 3) with the help of the frictional resistance of the drag spring 81. Move forward to the locking position.

This drag spring consists of a circular portion 83 that engages an angled groove in the starting pinion 53 and a support bracket 47.
It includes an extension 87 which engages a suitable ear or stop 89 extending therefrom.

That is, the frictional force exerted by the spring 81 prevents the starting shaft 51 and the starting pinion 53 from rotating together, and thereby moves the starting pinion 53 to the intermediate position when the starting shaft 51 starts rotating counterclockwise. advance to the engaged position.

Then, when the engine is ignited, the rotational speed of the engine becomes considerably higher than that of the starting pinion 53, as in the conventional case, thereby causing the starting pinion 53 to retreat from the engaged position to the intermediate position.

According to the present invention, as described above, a link mechanism, ie, a link device 89', is provided that engages the starting pinion and the starting gear only when the transmission is in the neutral state.

In the illustrated example, the starting shaft 51 is hollow and has a hole 90, although other types of construction are possible.
0 is provided with an upper push rod 91 that is movable between an upper position and a lower position, and a device that connects this push rod 91 to the starting pinion 53 and moves the starting pinion according to the movement of the push rod. .

In the illustrated example, the connection device passes from the upper push rod 91 through a pair of axially extending opposed openings 97 in the starter shaft 51 and into the starter pinion 53, although it can take various forms. It includes a lift pin 93 extending to engage the lower surface.

When the upper push rod 91 is in the lower position, the starter pinion 53 naturally falls or descends on the starter shaft 51 due to gravity from the intermediate or engaged position to the lockout position where its lower surface engages the lift pin 93. .

At this time, the drive pin 79 is located at the upper end of the recessed portion 73 extending in the axial direction.

As previously mentioned, if the starter shaft 51 rotates while the drive pin 79 is within the axially extending recessed portion 73, the starter pinion 53 and the starter shaft 51 rotate together; The starting pinion 53 does not advance to a position where it starts, ie engages the flywheel gear 27 .

When the upper push rod 91 is displaced from the lower position to the upper position, the starting pinion 53 is moved from the lockout position to the intermediate position.

The device 89' for switching the positional relationship between the slot and the pin is
The upper push rod 91 is also displaced from the lower position to the upper position within the hollow interior of the starting shaft 51, thereby moving the starting pinion 53 to an intermediate position where one drive pin 79 is located at the upper end of the spiral slot portion 77. and includes a device that allows the upper push rod 91 to fall by gravity from the upper position to the lower position, thereby allowing the starting pinion 53 to fall from the intermediate position to the lockout position.

This device can take many forms, but in the illustrated example the starter shaft 51 is completely hollow inside and has a second or lower push rod 121 inside.
is accommodated.

The upper end of this rod engages with the bottom of the first push rod 91, so that the upper push rod 91
1 to enable relative rotation with respect to the lower push rod 121 and to control the vertical position of the upper push rod 91.

The downward push rod 121 is pivotally connected at its other end, i.e. its lower end, to an arcuate connecting link 123 for pivoting about an axis transverse to the axis of the starting shaft 51; is pivotally attached to a lever 127 fixed to the lever 41;

Each of the above components is such that when the switching control shaft 41 is in the neutral position, the lower push rod 121 is connected to the starting shaft 51.
The upper push rod 9
1 to its upper position.

This push rod is connected to the starting pinion 5 on the starting shaft 51.
3 and 1 drive pin 79 is arranged to pull it up to an intermediate position located within the upper end of the spiral slot portion 77.

Therefore, when the starting shaft 51 rotates counterclockwise when these parts are in the above-described positions, the starting pinion 53 advances from the intermediate position to the engaged position to start the engine.

Of particular note is that the engine is only allowed to start when the switching control shaft 41 is in the neutral position.

However, when the switching control shaft 41 is swung from its neutral position to the forward, drive, or reverse drive position, the link 89' pulls down the lower push rod 121, thereby forcing the upper push rod 91 into its lower position by gravity. lower it to

At this time, the starting pinion 53 is pulled down to the lockout position.

As previously discussed, when the drive pin 79 is in the lockout position, ie, at the upper end of the axially extending recessed portion 73, the starting pinion cannot move from the lockout position to the engaged position.

Therefore, when the switching control shaft 41 is swung from its neutral position to the drive position, the starting pinion 5
3 falls into the lockout position to prevent the starting mechanism 29 from starting the engine.

[Brief explanation of the drawing]

FIG. 1 is a side view of an outboard motor equipped with various features of the present invention;
2 is an enlarged view of a portion of the mechanism shown in FIG. 1; FIG. 3 is a partial elevational view of various parts of the mechanism of FIG. 3 with the pinion shown in an intermediate position; and FIG. 4 is a locking pinion. 2 is a partial elevational view of parts of the mechanism of FIG. 2 shown in the out position, and FIG. 5 is a partially cut-away plan view of the mechanism shown in FIG. 11... Ship propulsion device, 23... Engine, 27... Gear, 29... Starting mechanism, 51... Starting shaft, 53...
Starting pinion, 11...Slot, 73...
...Recessed portion, 71...Spiral slot portion, 79...Drive pin.

Claims (1)

[Scope of Claims] 1. A ship propulsion device comprising an engine having a starting gear, a transmission device capable of switching between a neutral state and a driving state, and a starting device, wherein the starting device is rotatable. a starting pinion supported on the shaft for rotational and axial movement with respect to the shaft; a pin provided on the shaft and the starting pinion, and a slot for receiving the pin; A combination means,
the slot has a spiral slot portion and a recessed portion adjacent one end of the slot portion; and only when the transmission is in a neutral condition, the shaft and the to prevent relative movement with the starting pinion (from a lockout position in which the pin is received in the recessed portion, the pin is received in one end of the spiral slot portion adjacent to the recessed portion); Thus, as the shaft rotates, the starter pinion moves axially so that the starter pinion and the starter gear mesh, and as the shaft rotates, the starter pinion moves along with the shaft. means for moving the pin to an intermediate position capable of rotating and thereby starting the engine, the pin being in the lockout position when the transmission is in the drive condition; , a boat configured to prevent relative movement between the shaft and the starting pinion, prevent axial movement of the starting pinion, and thereby prevent meshing between the starting pinion and the starting gear. propulsion device.