JP3916177B2 - Outboard motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outboard motor that is a shift rod that moves in the vertical direction and in which a drive system of a propulsion device is switched to forward, neutral, or reverse.
[0002]
[Prior art]
In a conventional outboard motor, a shift rod rotating shaft extending in the left-right direction is rotatably provided, and a shift rod lever and an operating rod lever are fixed to the shift rod rotating shaft. The upper end portion of the shift rod is connected to the front end of the shift rod lever, and the rear end portion of the operating rod extending in the front-rear direction is connected to the front end of the operating rod lever. Then, when the shift control lever provided in the cockpit or the like is driven, the operating rod moves in the front-rear direction in conjunction with the control lever, and the shift rod rotating shaft rotates via the operating rod lever. . With this rotation of the rotation shaft for the shift rod, the shift rod moves in the vertical direction via the shift rod lever, and the lower end of the shift rod switches the drive system of the propulsion device to forward, neutral or reverse. In addition, a detent mechanism is provided so that the drive system is not inadvertently switched. The detent mechanism includes a detent cam fixed to the shift rod rotating shaft and detent position holding means that abuts on the detent cam.
[0003]
[Problems to be solved by the invention]
Meanwhile, the shift rod rotating shaft is rotatably supported by a pair of left and right bearings, and the shift rod lever and the detent cam are disposed between the right bearing and the left bearing. On the other hand, the actuating rod lever is arranged in a cantilevered state on the left side of the left bearing.
[0004]
In this way, the lever for the operating rod is attached to the rotating shaft for the shift rod in a cantilever state, which is unstable and not durable. Further, since the detent cam and the operating rod lever are separated from each other, the shift rod rotating shaft may be twisted, resulting in poor followability. As a result, the operation feeling is deteriorated.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an outboard motor that has a good feeling of operation for switching the drive system of the propulsion device to forward, neutral, or reverse.
[0006]
[Means for Solving the Problems]
The outboard motor of the present invention includes a shift rod (27) extending in the up-down direction, a rotation shaft for shift rod (44) extending in the left-right direction, and an operating rod (38) extending in the front-rear direction, A pair of left and right bearings (41, 42) that rotatably support the rotation shaft for the shift rod, and a lever for the shift rod that is fixed to the rotation shaft for the shift rod and whose tip is connected to the upper portion of the shift rod (46), and a detent cam (47) which is fixed to the rotation shaft for the shift rod and includes a forward cam surface (56), a neutral cam surface (57) and a reverse cam surface (58). The detent position holding means (61, 62) for holding the position of the detent cam in contact with the detent cam and the rotary shaft for the shift rod are fixed, and the tip portion is behind the operating rod. And an actuating rod lever (48) coupled to the detent position holding means, and the actuating rod is moved in the front-rear direction against the holding force of the detent position holding means to rotate the shift rod rotating shaft. With this rotation, the drive system (10, 11, 14) of the propulsion device is switched to forward, neutral or reverse by moving the shift rod in the vertical direction. In order to achieve the above object, the shift rod lever, the detent cam and the operating rod lever are disposed between the left bearing and the right bearing, and the detent cam and the operating rod lever are close to each other. is doing.
[0007]
In some cases, the detent cam and the operating rod lever are integrally formed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of an outboard motor according to the present invention will be described with reference to FIGS. FIG. 1 is a side view of an outboard motor according to the present invention. 2 is a plan view of the inside of the front side of the upper part of the outboard motor of FIG. FIG. 3 is a plan view of the inside of the upper portion of the outboard motor of FIG. FIG. 4 is a left side view inside the outboard motor. FIG. 5 is a right side view of the inside of the outboard motor. 6 is a cross-sectional view taken along the line AA in FIG. FIG. 7 is a BB cross-sectional view of FIG. FIG. 8 is an enlarged view of a main part of FIG.
[0009]
The outboard motor is covered with a housing including an upper cowling 1, a lower cowling 2, an upper casing 3, and a lower casing 4 in order from the upper side. An engine 9 is provided in a cowling composed of an upper cowling 1 and a lower cowling 2, and an output shaft of the engine 9 is connected to a drive shaft 10. The drive shaft 10 penetrates the inside of the upper casing 3 in the vertical direction, and the lower end thereof reaches the lower part of the lower casing 4. A propeller 12 is attached to the rear end portion via a transmission mechanism 11 such as a bevel gear. The propeller shaft 14 is driven to rotate. The drive shaft 10, the transmission mechanism 11, and the propeller shaft 14 constitute a propulsion unit drive system. The lower end portion of the shift rod 27 switches the transmission mechanism 11 to forward, neutral or reverse. The shift rod 27 passes through the pivot shaft and extends in the vertical direction. The upper end of the shift rod 27 passes through the lower cowling 2 and protrudes into the cowling.
[0010]
A mounting bracket 18 for mounting the outboard motor to a small vessel has a clamp 19 at the front end, and is fastened and fixed to the transom 20 of the small vessel by the clamp 19. The outboard motor main body is rotatably attached to the rear portion of the mounting bracket 18 via a pivot shaft or the like.
[0011]
A steering bracket 31 is provided on the upper end of the pivot shaft so as to project forward. A steering handle 33 is attached to the left end portion of the steering bracket 31 so as to be rotatable in the vertical direction. Further, the steering bracket 31 is provided with a rotation shaft 34 extending in the left-right direction, and a shift lever 36 is attached so as to be rotatable in the front-rear direction around the rotation shaft 34. A front end of an operating rod 38 is connected to the shift lever 36. The actuating rod 38 extends in the front-rear direction, extends through the lower cowling 2 and into the lower cowling 2.
[0012]
The lower cowling 2 is provided with a pair of left and right bearings 41 and 42, and these bearings 41 and 42 rotatably support a shift rod rotating shaft 44 extending in the left and right direction. Both end portions of the shift rod rotating shaft 44 protrude outward from the bearings 41 and 42 on both sides, that is, on both the left and right sides. Between the bearings 41 and 42, the starter safety device lever 45, the shift rod lever 46, the detent cam 47, and the operating rod lever 48 are shifted on the shift rod rotating shaft 44 in order from the right side. It is fixed so that it cannot rotate relative to the rod rotation shaft 44. Further, on the left side of the left bearing 42, a neutral switch lever 49 is fixed to the shift rod rotation shaft 44 so as not to be relatively rotatable. A member such as an optional device can be attached to the right end of the shift rod rotating shaft 44 as appropriate.
[0013]
A Bowden wire 51 is connected to the starter safety device lever 45, and an end portion of the Bowden wire 51 is connected to a manual starter safety device provided above the engine 9. The tip of the shift rod lever 46 protrudes rearward, and the upper end of the shift rod 27 is connected to this tip.
[0014]
On the lower surface of the detent cam 47, a forward cam surface 56 is formed on the front side, a neutral cam surface 57 is formed in the center, and a reverse cam surface 58 is formed on the rear side. Below the detent cam 47, a pin 61 is always urged upward by a spring 62 as urging means. The detent cam 47, the pin 61, and the spring 62 constitute a detent mechanism.
[0015]
Further, the tip of the operating rod lever 48 protrudes upward, and the rear end of the operating rod 38 is connected to this tip. The operating rod lever 48 and the detent cam 47 are integrally formed of resin or metal.
[0016]
Further, the neutral switch 66 fixed to the upper surface of the lower cowling 2 is positioned above the neutral switch lever 49. When the shift rod 27 is in the neutral position, the tip of the neutral switch lever 49 is pressed against the operating portion 66a of the neutral switch 66, and the shift rod 27 is in the forward or reverse position. In other words, the tip of the neutral switch lever 49 is separated from the operating portion 66 a of the neutral switch 66.
[0017]
In the illustrated outboard motor, the propulsion unit drive system is in a neutral state, and the pin 61 abuts against the neutral cam surface 57 of the detent cam 47 to hold the position of the detent cam 47. Then, when moving forward, the shift lever 36 is pulled and rotated forward to move the operating rod 38 forward. As the actuating rod 38 moves, the actuating rod lever 48 rotates counterclockwise in FIG. 6, and accordingly, the shift rod rotating shaft 44, the neutral switch lever 49, the detent cam 47, the shift. The rod lever 46 and the starter safety device lever 45 rotate together in the counterclockwise direction. In this manner, the shift rod rotating shaft 44 is rotated by the operating rod 38, and the operating rod 38 functions as a drive member for the shift rod rotating shaft 44.
[0018]
At the time of switching from the neutral state to the forward state, the detent cam 47 rotates while pressing and displacing the pin 61 against the urging force of the spring 62. After the rotation, the pin 61 is detent cam. 47 abuts the forward cam surface 56 and holds the position of the detent cam 47. Further, the shift rod 27 moves upward by the rotation of the shift rod lever 46, and the drive system of the propulsion device is switched to the forward movement state.
[0019]
In this way, when the forward state is reached, the tip of the neutral switch lever 49 is separated from the operating portion 66a of the neutral switch 66, and the switch that was ON in the neutral state is turned OFF, preventing the start of the electric starter or the like. . The displacement of the starter safety device lever 45 is transmitted to the manual starter safety device via the Bowden wire 51, and this safety device prevents the manual starter from operating.
[0020]
Next, when changing from the forward state to the neutral state, the shift lever 36 is rotated backward against the detent mechanism, and the shift rod rotation shaft 44 is rotated clockwise in FIG. It rotates to engage the neutral cam surface 57 of the detent cam 47 with the pin 61. In this neutral state, the tip of the neutral switch lever 49 comes into contact with the operating portion 66a of the neutral switch 66, the switch is turned on, and activation of the electric starter or the like is permitted. Also, the displacement of the starter safety device lever 45 is transmitted to the manual starter safety device via the Bowden wire 51, and this safety device allows the manual starter to operate.
[0021]
Further, when changing from the neutral state to the reverse state, the shift lever 36 is further rotated backward against the detent mechanism, and the shift rod rotation shaft 44 is rotated clockwise in FIG. The reverse cam surface 58 of the cam 47 is engaged with the pin 61. In this reverse state, the tip of the neutral switch lever 49 is separated from the operating portion 66a of the neutral switch 66, the switch is turned off, and activation of the electric starter or the like is prevented. The displacement of the starter safety device lever 45 is transmitted to the manual starter safety device via the Bowden wire 51, and this safety device prevents the manual starter from operating.
[0022]
As described above, when the drive system of the propulsion device is switched, it is necessary to move the operating rod 38 against the detent mechanism, and a large force is applied to the operating rod lever 48 and the detent cam 47. However, in this embodiment, no other member such as a bearing is disposed between the actuating rod lever 48 and the detent cam 47, and the actuating rod lever 48 and the detent cam 47 are close to each other, and the shift is performed. The rod rotating shaft 44 is less likely to be twisted. In addition, since the actuating rod lever 48 and the detent cam 47 are integrally formed, most of the force from the actuating rod lever 48 is directly transmitted to the detent cam 47. As a result, the followability is good and the operation feeling is good.
[0023]
As described above, in this embodiment, the starter can operate only in the neutral state, and the propeller 12 does not rotate carelessly when the starter is operated.
[0024]
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Can be done. Examples of modifications of the present invention are illustrated below.
(1) Although the shift lever 36 is directly operated in the embodiment, it is also possible to connect the shift control lever provided in the cockpit or the like and the shift lever 36 with a Bowden wire or the like. .
[0025]
(2) In the embodiment, the detent position holding means of the detent mechanism is constituted by the pin 61 and the spring 62, but other members such as a roller may be used instead of the pin 61.
(3) A throttle valve lever is provided on the rotation shaft 44 for the shift rod, and in the neutral state, the amount of rotation of the throttle valve pulley is regulated by contacting the throttle valve lever with a member interlocked with the throttle valve pulley. It is also possible. In this way, it is possible to prevent full throttle in the neutral state.
[0026]
【The invention's effect】
According to the present invention, since the shift rod lever, the detent cam, and the operating rod lever are disposed between the left bearing and the right bearing, the detent cam and the operating rod lever to which a large force is applied, The bearings on both the left and right sides are supported in a dual-supported state, and operate stably and improve durability. In addition, since the detent cam and the actuating rod lever are close to each other, the twisting of the shift rod rotating shaft is reduced, and the followability is improved. As a result, the feeling of operation is improved.
[0027]
Also, when the detent cam and the actuating rod lever are integrally molded, a large force from the actuating rod lever is directly transmitted to the detent cam, which further prevents the shift rod rotating shaft from being twisted. It can be prevented efficiently. As a result, the followability is further improved and the feeling of operation is improved.
[Brief description of the drawings]
FIG. 1 is a side view of an outboard motor according to the present invention.
2 is a plan view of the inside of the front side of the upper part of the outboard motor of FIG. 1. FIG.
FIG. 3 is a plan view of the inside of the upper portion of the outboard motor of FIG. 1;
FIG. 4 is a left side view of the interior of the outboard motor.
FIG. 5 is a right side view of the inside of the outboard motor.
6 is a cross-sectional view taken along the line AA in FIG. 2. FIG.
FIG. 7 is a cross-sectional view taken along the line BB of FIG.
FIG. 8 is an enlarged view of a main part of FIG. 2;
[Explanation of symbols]
10 Drive shaft (propulsion drive system)
11 Transmission mechanism (propulsion drive system)
14 Propeller shaft (propulsion drive system)
27 Shift rod 38 Actuating rod 41, 42 Bearing 44 Shift rod rotating shaft 46 Shift rod lever 47 Detent cam 48 Acting rod lever 56 Forward cam surface 57 Neutral cam surface 58 Reverse cam surface 61 Pin (for detent) Position holding means)
62 Spring (position holding means for detent)

Claims (2)

A shift rod extending vertically,
A rotation shaft for a shift rod extending in the left-right direction;
An operating rod extending in the front-rear direction;
A pair of left and right bearings rotatably supporting the rotation shaft for the shift rod;
A shift rod lever fixed to the rotation shaft for the shift rod and having a tip connected to an upper portion of the shift rod;
A detent cam fixed to the rotation shaft for the shift rod and having a forward cam surface, a neutral cam surface and a reverse cam surface;
Detent position holding means for holding the position of the detent cam in contact with the detent cam;
An operating rod lever fixed to the rotary shaft for the shift rod and having a tip connected to a rear portion of the operating rod;
The actuating rod is moved in the front-rear direction against the holding force of the detent position holding means, and the shift rod rotating shaft is rotated. In accordance with this rotation, the shift rod is moved in the vertical direction. In an outboard motor that switches the propulsion unit drive system to forward, neutral, or reverse,
The shift rod lever, detent cam and actuating rod lever are disposed between the left and right bearings;
An outboard motor characterized in that a detent cam and an operating rod lever are close to each other. 2. The outboard motor according to claim 1, wherein the detent cam and the operating rod lever are integrally formed.

Images