JP4236476B2 - Small planing boat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a personal watercraft that adjusts the opening of a throttle valve of an engine according to the operation of a throttle lever.
[0002]
[Prior art]
Conventionally, in a small planing boat such as a jet propulsion boat, the hull is propelled by driving an engine installed in the hull (see, for example, Patent Document 1). In such a small planing boat, a steering handle comprising a bar handle is provided at the upper part of the hull, and a throttle lever is provided in the vicinity of the grip of the steering handle. The throttle lever is provided with a detection device for detecting the operation amount of the throttle lever.
[0003]
Then, by manually operating the throttle lever to advance and retract with respect to the grip, the detection device detects the operation amount of the throttle lever, and the opening of the engine throttle valve is adjusted according to the detected value. ing. The small planing boat changes the traveling speed according to the throttle opening. In this case, the operation of the throttle valve is performed by driving the drive device controlled by the control device, and the control device controls the drive device based on the detection value of the detection device. The detection device is installed in a waterproof case provided near the throttle lever.
[0004]
[Patent Document 1]
JP 2000-219197 A
[Problems to be solved by the invention]
The detection device and drive device used in such a small planing boat may cause malfunction or failure when wet. However, in the conventional small planing boat described above, the detection device is provided on the hull. Since it is provided in the upper part, there is a problem that water may be generated inside. The detection device is housed in a waterproof case, but this is still insufficient and further improvement has been desired. Moreover, although the drive device is provided in the inside of the hull where water does not easily enter, it is preferable that this drive device also has a waterproof structure.
[0006]
Summary of the Invention
The present invention has been made to cope with the above-described problem, and an object of the present invention is to provide a personal watercraft that can prevent water from entering inside the detection device and the drive device.
[0007]
In order to achieve the above object, the structural features of the personal watercraft according to the present invention include a throttle lever, a detection device that detects the operation amount of the throttle lever, an engine throttle valve, and a throttle valve that opens and closes. In a personal watercraft provided with a drive device and a control device that operates the drive device in accordance with a detection value detected by the detection device, the drive device and the detection device are installed in the engine compartment , and the drive device is the first. And the detection device is installed in a second waterproof case configured separately from the first waterproof case .
[0008]
In the personal watercraft of the present invention configured as described above, the detection device and the drive device are installed in the engine room provided in the hull and configured in a watertight structure. Therefore, the detection device and the drive device can be sufficiently waterproofed, and intrusion of seawater or the like into the detection device and the drive device can be prevented. As a result, the reliability of the detection device and the drive device can be improved, and an effect of preventing breakage can be achieved. Even when a small planing boat rolls over during traveling, it can be run as it is by returning the hull.
[0010]
Further, the personal watercraft according to the present invention, the driving device is installed in the first waterproof case, the detection device that is installed in the second waterproof case, which is composed of a first waterproof case and another member . According to this, since the drive device and the detection device can be set at different positions, the degree of freedom in selecting the installation position is increased.
[0011]
Further, other structural features of the personal watercraft according to the present invention include a throttle lever, a detection device that detects an operation amount of the throttle lever, an engine throttle valve, and a drive device that drives the throttle valve to open and close, in accordance with the detection value detecting device detects, in a personal watercraft and a control device for actuating the drive device, it is installed a drive unit and a detection device in the engine compartment, and a drive operated device with a rotating shaft It is composed of a motor, the motor is installed adjacent to the engine, and the rotation shaft is connected to a valve shaft that rotatably supports the throttle valve. According to this, since the rotating shaft of the motor and the valve shaft of the throttle valve are directly connected, backlash is eliminated and the response of the throttle valve to the driving of the motor is improved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a personal watercraft 10 according to the present invention. The hull of the personal watercraft 10 includes a hull 11 and a deck 12. A steering handle 13 including a bar handle is provided at a front portion of the upper portion of the deck 12, and a seat 14 is provided behind the steering handle 13. . A foot step 12a for placing a foot is formed on both sides of the seat 14 in the deck 12. A throttle lever 15 is provided in the vicinity of the grip 13a of the steering handle 13 so as to be rotatably supported by a shaft portion and can be moved back and forth with respect to the peripheral surface of the grip 13a. Is provided.
[0013]
A watertight engine room 17 is formed inside the hull. The engine room 17 is waterproof and accommodates an engine 20, a resistor 40 as a detection device of the present invention, and a motor 50 as a drive device of the present invention. Various devices such as a case 30 and an electrical box (ECU) 60 are installed. The engine 20 is configured by a four-cylinder four-cycle type in which four cylinders 21 are arranged in the front-rear direction. An intake device 22 is disposed on the hull port side, and an exhaust device 23 is disposed on the starboard side. ing. The intake device 22 includes a carburetor 24 that is connected to an intake passage provided in each cylinder 21, and an upstream portion of each carburetor 24 is connected to an intake box 22a.
[0014]
Further, as shown in FIG. 3, in the intake passages 24a of the carburetors 24, disk-like throttle valves 25 are supported in a rotatable state by the valve shafts 25a. The throttle valve 25 adjusts the opening degree of the air passage (throttle opening degree) that passes through the intake passage 24a. The exhaust device 23 includes an exhaust manifold 26 that joins exhaust pipes connected to the exhaust passages of the cylinders 21, and an exhaust expansion chamber 27 is connected to the downstream end of the exhaust manifold 26. A throttle opening detection sensor 28 for detecting the opening of the throttle valve 25 is provided on the valve shaft 25a of the throttle valve 25.
[0015]
A waterproof case 30 according to the present invention is provided in the vicinity of the engine 20 in the engine chamber 17. As shown in FIG. 4, the waterproof case 30 is formed in a box shape having a space portion hermetically sealed at the upper and lower portions, the upper space portion serving as the resistor housing portion 31, and the lower space portion. Is the motor housing portion 32. A resistor 40 is attached to the resistor accommodating portion 31. Two upper and lower waterproof chambers 31a and 31b are formed on one side of the upper portion of the resistor accommodating portion 31, and through holes 33a and 34a are formed in the partition portions 33, 34, and 35 that divide the waterproof chambers 31a and 31b, respectively. , 35a are provided.
[0016]
A rotating shaft 41 having a lever portion 41a attached to the upper end and a screw 41b formed on the lower peripheral surface is rotatably attached to each through hole 33a, 34a, 35a. A seal portion 36a made of an O-ring is provided between the rotary shaft 41 and the peripheral surface of the through hole 33a and is hermetically sealed. The lower end portion of the rotary shaft 41 that protrudes below the partition portion 35 through the through hole 35a. The nut 42 is engaged to prevent the rotary shaft 41 from coming off from the resistor housing 31.
[0017]
Further, a return spring 43 is accommodated in the waterproof chamber 31a, and the return spring 43 urges the rotary shaft 41 so that the lever portion 41a is positioned at the position a shown in FIG. Further, a serration 41c is formed in a portion of the rotary shaft 41 in the waterproof chamber 31b, and a base body 45 provided with a movable contact 44 is connected to the serration 41c so that the rotary shaft 41 and the movable contact 44 are brought together. It is supposed to move. A C ring 46 is fitted over the base body 45 in the rotating shaft 41 so that the base body 45 does not move in the axial direction.
[0018]
The movable contact 44 has a first contact portion 44 a provided at the tip of the base body 45 and a second contact portion 44 b provided projecting downward on the lower surface of the base body 45. The inner wall surface of the waterproof chamber 31b facing the first contact portion 44a is provided with an arc-shaped fixed contact 47a that contacts the first contact portion 44a, and the partition portion in the waterproof chamber 31b facing the second contact portion 44b. A fan-shaped resistance indicator 47b with which the second contact portion 44b contacts is provided on the upper surface of 35. The resistance indicator 47b is set so that the resistance value gradually decreases from the position a to the position b shown in FIG.
[0019]
The distal end portion of the lever portion 41 a is connected to the throttle lever 15 by a slot cable 48, and the lever portion 41 a moves according to the operation of the throttle lever 15 to rotate the rotating shaft 41. The fixed contact 47a and the resistance indicator 47b are respectively connected with electric wires 48, and both electric wires 48 have resistance values that change in accordance with the movement of the movable contact 44 based on the operation amount of the throttle lever 15. The corresponding voltage can be detected. The operation amount of the throttle lever 16 can be detected from the change in the voltage detection value. The end of the electric wire 48 is connected to the external electrical equipment box 60 through a hole 31c provided in the wall surface of the resistor housing 31. The hole 31c and the electric wire 48 are sealed with a sealing material 36b.
[0020]
A motor 50 is attached in the motor housing portion 32. A through hole 37 a is provided in the bottom portion 37 of the motor housing portion 32, and the lower end portion of the rotating shaft 51 of the motor 50 extends outside the motor housing portion 32 through the through hole 37 a. A seal portion 36c made of an O-ring is provided between the rotary shaft 51 and the peripheral surface of the through-hole 37a so as to be sealed, and passes through the through-hole 37a and protrudes below the motor housing portion 32. A pulley 52 is attached to the lower end of the pulley.
[0021]
As shown in FIG. 6, the pulley 52 is connected to the valve shaft 25 a of the throttle valve 25 via the operation cable 53, and opens and closes the throttle valve 25 by driving the motor 50. An electric wire 54 is connected to the motor 50, and the electric wire 54 is connected to an external electrical equipment box 60 through a hole 31 d provided in the wall surface of the motor housing portion 32. The electric wire 54 and the hole 31d are sealed with a sealing material 36d.
[0022]
The electrical box 60 is electrically connected to the electric wires 48 and 54 described above, and controls the motor 50 based on the detection signal from the resistor 40. Moreover, the electrical equipment box 60 is connected to the meter unit 16 through the electric wire 61 and is connected to the engine 20 through the electric wire 62 to control these devices. Furthermore, the electrical box 60 includes a CPU, a ROM, a RAM, and the like, and executes various programs and various arithmetic processes.
[0023]
Further, a fuel tank 63 is provided at a front position of the engine 20 in the hull, and an oil tank 64 for storing engine oil is provided on the hull port side of the engine 20. When the engine 20 is driven, external air is sucked into the interior via the intake device 22, compressed, and supplied to each cylinder 21. On the other hand, fuel is sent out from the fuel tank 63 by driving a fuel pump (not shown), and this fuel is atomized by the throttle valve 25 and supplied to each cylinder 21. For this reason, in each cylinder 21, an air-fuel mixture of fuel and air is generated, and this air-fuel mixture is ignited and burned by the discharge of the spark plug.
[0024]
A pump chamber 65 is formed at the rear lower part of the hull, and a jet propulsion device 66 is disposed in the pump chamber 65. An impeller shaft 67a that rotates the impeller 67 of the jet propulsion unit 66 is coupled to a crankshaft 68 that extends rearward from the rear portion of the engine 20 via a coupling 68a. For this reason, when the air-fuel mixture burns in the engine 20, the crankshaft 68 rotates, the rotational force is transmitted to the impeller 67 through the coupling 68a and the impeller shaft 67a, and the impeller 67 rotates. The small planing boat 10 is propelled by the rotation of the impeller 67. At that time, the personal watercraft 10 turns left and right by operating the steering handle 13.
[0025]
The oil tank 64 stores lubricating oil, and supplies the lubricating oil to each cylinder 21 of the engine 20 by driving a hydraulic pump (not shown). As a result, the engine 20 is prevented from seizing and can maintain a good operating state. A water lock 71 having a downstream end of the exhaust expansion chamber 27 connected via a rubber hose 69 is provided on the rear port side of the hull. The water lock 71 extends upward from the downstream end of the water lock 71. A discharge pipe 72 is provided across the jet propulsion unit 66.
[0026]
In the above configuration, when the operator steers the personal watercraft 10, the grip 13a of the steering handle 13 is held with a switch (not shown) installed in the vicinity of the steering handle 13 turned on. Then, a finger is hooked on the throttle lever 15 to move the throttle lever 15 toward the grip 13a. As a result, the throttle cable 48 is pulled, and the position of the lever portion 41a of the resistor 40 moves from the position a to the position b. The resistance value between the fixed contact 47a and the resistance indicator 47b changes according to the amount of movement of the lever portion 41a, and the electrical box 60 detects the detected voltage value corresponding to this change. The electrical box 60 drives the motor 50 based on the detected value.
[0027]
By driving the motor 50, the operation cable 53 is moved to rotate the throttle valve 25 to adjust the throttle opening. In this case, as the throttle lever 15 is moved closer to the grip 13a, the throttle opening becomes larger and the small planing boat 10 travels at a higher speed. As the throttle lever 15 is moved away from the grip 13a, the throttle opening becomes smaller and the small planing boat 10 Drive at low speed. Further, when the throttle lever 15 is moved farthest away from the grip 13a, the lever portion 41a is positioned at the position a and the idling state is established. By adjusting the operation amount of the throttle lever 15 and operating the steering handle 13, the personal watercraft 10 travels while changing the speed and changing the course.
[0028]
During this traveling, water does not enter the interior of the personal watercraft 10 even if the splashes rise. In addition, since the portion of the personal watercraft 10 where the engine room 17 and each device are provided has a watertight structure, water can be prevented from entering. Furthermore, since the resistor 40 and the motor 50 are provided in the waterproof case 30, it is possible to prevent water from entering more reliably. For this reason, even if the small planing boat 10 rolls over during traveling, the traveling can be continued as it is when the small planing boat 10 is returned to its original state. Further, in this personal watercraft 10, since the resistor 40 and the motor 50 are accommodated in the waterproof case 30, only one waterproof case 30 is required and the cost is reduced.
[0029]
Further, as another embodiment, two waterproof cases, a first waterproof case composed of a drive device accommodating portion and a second waterproof case composed of a detecting device accommodating portion, are provided, and a motor is provided in the first waterproof case. It may be installed and the detection device may be installed in the second waterproof case. In this case, the two waterproof cases are provided in an easily installable portion in the vicinity of the engine inside the small planing boat. For example, the first waterproof case is provided at the same position as the motor housing portion 32 described above, and the second waterproof case is provided on the deck D shown in FIG. 7 with bolts 39a and nuts 39b as shown in FIG. It can be attached with.
[0030]
In addition, since the resistor installed in the 2nd waterproof case is the same structure as the resistor 40 shown in FIG. 4, the same code | symbol is described in the same part. With this configuration, the degree of design freedom is increased, and the manufacture of a small planing boat is facilitated. In this case, the motor installed in the first waterproof case can be directly connected to the throttle valve, as will be described later with reference to FIG.
[0031]
FIG. 9 shows a state in which a resistor 80 and a motor 81 provided in a small planing boat according to still another embodiment are attached. In this small planing boat, the resistor 80 and the motor 81 are mounted in a waterproof case having a structure substantially equal to that of the waterproof case 30 shown in FIG. 4, and as shown in FIG. Is directly connected to the valve shaft 82a of the throttle valve 82. For this reason, a pulley and an operation cable are not used.
[0032]
About the structure of the other part of this small planing boat, it is the same as the small planing boat 10 mentioned above. Therefore, the same reference numerals are given to the same parts. According to this, since the rotating shaft 81a of the motor 81 is directly connected to the valve shaft 82a of the throttle valve 82, backlash is eliminated and the responsiveness of the throttle valve 82 is improved. Further, since the number of members is reduced, the manufacturing cost can be reduced.
[0033]
Moreover, FIG. 11 has shown the attachment state of the detection apparatus and drive device with which the personal watercraft by further embodiment is provided. In this small planing boat, the engine 85 is provided with only one throttle valve 86. The resistor 87 and the motor 88 are mounted in a waterproof case having the same structure as the waterproof case 30, and the rotating shaft 88 a of the motor 88 is directly connected to the valve shaft 86 a of the throttle valve 86. About the structure of the other part of this small planing boat, it is the same as the small planing boat 10 mentioned above. Therefore, the same reference numerals are given to the same parts. Also by this, it is possible to obtain the same effect as the above-described small planing boat 10 or the like.
[Brief description of the drawings]
FIG. 1 is a plan view showing the inside of a personal watercraft according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a small planing boat as viewed from the side.
FIG. 3 is a front view showing a throttle valve.
FIG. 4 is a cross-sectional view showing a detection device and a motor installed in a waterproof case.
5 is a partially cutaway cross-sectional view showing a state of the waterproof case of FIG. 4 as viewed from above.
FIG. 6 is a cross-sectional view showing a connection state of a motor and an operation cable.
FIG. 7 is a cross-sectional view showing a mounting position of a detection device provided in a personal watercraft according to another embodiment.
FIG. 8 is a cross-sectional view showing an attachment state of a detection device provided in the personal watercraft shown in FIG.
FIG. 9 is a schematic configuration diagram showing an attachment state of a detection device and a drive device included in a personal watercraft according to still another embodiment.
10 is a front view showing a connection state between a throttle valve and a motor provided in the small personal watercraft shown in FIG. 8. FIG.
FIG. 11 is a schematic configuration diagram showing an attachment state of a detection device and a drive device provided in a personal watercraft according to still another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Small planing boat, 13 ... Steering handle, 15 ... Throttle lever, 17 ... Engine room, 20, 85 ... Engine, 25, 82, 86 ... Throttle valve, 30 ... Waterproof case, 31 ... Resistor housing, 32 ... Motor housing part, 40, 80, 87 ... resistor, 48 ... throttle cable, 50, 81,88 ... motor, 53 ... operation cable, 60 ... electrical equipment box.

Claims (2)

A throttle lever, a detection device that detects the operation amount of the throttle lever, an engine throttle valve, a drive device that drives the throttle valve to open and close, and the drive device according to a detection value detected by the detection device. In a personal watercraft with a control device to be operated,
The drive device and the detection device are installed in the engine compartment, the drive device is installed in a first waterproof case, and the detection device is configured separately from the first waterproof case. A personal watercraft characterized by being installed in a waterproof case . A throttle lever, a detection device that detects the operation amount of the throttle lever, an engine throttle valve, a drive device that drives the throttle valve to open and close, and the drive device according to a detection value detected by the detection device. In a personal watercraft with a control device to be operated,
The drive device and the detection device are installed in the engine chamber, the drive device is constituted by a motor having a rotation shaft, the motor is installed adjacent to the engine, and the rotation shaft is connected to the throttle small type watercraft, characterized in that coupled to the valve shaft for rotatably supporting the valve.

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