JPH0792094B2 - Hydraulic cylinder device for marine engine control - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hydraulic cylinder device for controlling a marine engine, which is installed and used in a small fishing boat or the like.

[Prior Art] Conventionally, a cylinder is laterally fixed on the upper surface of a pedestal, and a rod-shaped handle to which an engine control wire is connected is swingably supported on the outside of the cylinder, and the swing fulcrum of the handle is integrated with the handle. A hydraulic cylinder device for controlling a marine engine, which is provided with a rotating pinion, is arranged below the pinion, and is meshed with a rack movably translated in parallel with a piston rod of a cylinder through a coupling means. Are known.

[Problems to be Solved by the Invention] In the hydraulic cylinder device for marine engine control described in the prior art, the rack is normally moved through the piston rod by operating the piston by the hydraulic pressure of the hydraulic circuit, and the rack meshes with the rack. The rotation of the pinion causes the rod-shaped handle to swing to the right or left, and the governor of the engine or the clutch control for forward / backward movement is performed by the amount of wire pulling according to the amount of swing of the handle, and the hydraulic pressure of the hydraulic circuit is changed. Although it is possible to control the engine by manual operation of the above handle in the unloading state by release,
The problem is that the handle has a large pulling force of 20kg to 30kg from the engine through the wire, so in order to smoothly swing the handle against this pulling force, the rack that is likely to occur when moving the rack It is necessary to correct the floating tendency of the rack so as not to overload the meshing relationship between the rack and the pinion.

Therefore, the present invention has an object to add a device for connecting the rack to the piston rod so that the handle can be smoothly swung.

[Means for Solving the Problems] In the present invention for achieving the above object, a cylinder is laterally fixed to an upper surface of a pedestal, and a lower end of a rod-shaped handle having an engine control wire connected to an outer surface of the cylinder is provided. A pinion that is swingably supported and that rotates integrally with the handle is provided at the swing fulcrum of the handle, the pinion is disposed below this pin, and the pinion of the cylinder is movable in parallel via a connecting means. In a hydraulic cylinder device in which the connected racks are engaged, the connecting means for connecting the piston rod and the rack causes the piston rod to project from both ends of the cylinder, and the lower surfaces of the protruding piston rods are brought into sliding contact with the upper surface of the pedestal. The rack is supported on both sides via the connecting member, and at least the lower surface of the rack is formed flat so that the lower surface is The gist is to make the sliding contact with the upper surface of the pedestal.

[Embodiment] 1 is a pedestal for supporting a cylinder, a cylinder 2 is laterally fixed on the upper surface of the pedestal 1, a piston 3 is inserted into the cylinder 2, and a hydraulic circuit is provided at both end ports of the cylinder 2. One end of the conduit A and the other end of the conduit B, which form the above, are communicated with each other, and the conduits A and B are communicated with the electromagnetic switching valve 4, and the electromagnetic switching valve 4 constitutes the hydraulic pressure supply device via the oil supply pipe C. The hydraulic pump 5 is connected to the hydraulic pump 5 through the suction pipe D, and the hydraulic pump 5 is opened and communicated with the oil tank 6.

A bypass valve 7 is connected to the middle of the conduits A and B via branch pipes A ₁ and B ₁ .

E is a pipe for returning the hydraulic pressure.

Piston rods 8 are connected to both sides of the piston 3 to project the piston rods 8 to the outside of both ends of the cylinder 2, and the bottom surface of the protruding rod portion is slidably contacted with the top surface of the base 1 to form a thick plate. The connecting members 9 are attached at right angles to each other, and the connecting members 9 each have a rectangular cross section. Both ends of a rack 10 whose lower surface is in sliding contact with the upper surface of the pedestal 1 are parallel to the cylinder 2 and are exposed to the outside. Fixedly supported in a double-sided manner, the upper surface engaging teeth of the rack 10 are engaged with a pinion 11 provided on the outer surface of the cylinder 2, and a lower end of a rod-shaped handle 13 is attached to a rotating shaft 12 supporting the pinion 11. It is a thing.

Incidentally, 14 is a potentiometer that detects the amount of movement of the piston attached to the connecting member, and in this example, a remote control device is connected to this potentiometer via a lead wire 15,
The hydraulic pump 5 and the electromagnetic switching valve 4 are driven by remote control.

A wire 16 is connected to the handle 13 via a connecting piece 17, and the wire 16 is connected to a cover such as an engine provided at a remote position (not shown).

[Operation] Normally, the oil in the oil tank 6 is sucked through the suction pipe D by the drive of the hydraulic pump 5, enters the electromagnetic switching valve 4 through the oil supply pipe C, and is switched by the electromagnetic switching valve 4. It flows into the one side chamber or the other side chamber of the cylinder 2 through the conduit A or B, and moves the piston 3 to the left or the right in the figure, and by this movement, the connecting member 9 and the supporting member 9 are supported. As the rack 10 moves, the handle 13 also swings, and the swing causes the wire 16 to be pulled or released to control the engine cover and the like.

Further, when it becomes necessary to manually operate the piston 3 due to an electrical failure or the like, the bypass valve 7 is opened, whereby the inflow of oil into the cylinder 2 is cut off, and the inside of the cylinder 2 is unloaded. .

In this unloading state, the handle 13 can be rocked by hand to control the engine cover and the like.

[Effects of the Invention] As described above, the present invention has the following effects.

(A) Since the piston rods are projected from both ends of the cylinder, and both ends of the rack are supported by both rods through the connecting members whose lower surfaces are in sliding contact with the upper surface of the pedestal, the connecting members slide on the pedestal. The rack's double-sided action by the connection member reliably corrects the rack's tendency to float when the rack moves, thereby preventing overloading of the meshing of the rack and pinion, and a large pulling force of the wire acting on the handle. The handle can be swung smoothly even while doing so.

(B) Since the lower surface of the rack is formed flat and the lower surface is brought into sliding contact with the upper surface of the pedestal, the sliding of the rack is stabilized, and the rack is substantially held between the pinion and the pedestal. Since the rack is moved in this manner, the tendency of the rack to float can be prevented here as in the case of (a), and the sliding of the rack can be double stabilized.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of the hydraulic cylinder device, FIG. 2 is a partially cutaway side view of the same as above, FIG. 3 is a sectional view of the cylinder portion of the same as above, and FIG. 4 is an explanatory view of a conventional example. A, B, C, D, E …… hydraulic circuit, 2 …… cylinder, 3 …… piston, 5 …… hydraulic supply device, 7 …… bypass valve, 8 …… rod, 9
...... Connecting member, 10 ...... Rack rod, 11 ...... Pinion, 13 ......
Manual handle.

Claims (1)

[Claims] 1. A cylinder is laterally fixed to an upper surface of a pedestal, and a lower end of a rod-shaped handle, to which an engine control wire is connected, is swingably supported on an outer surface of the cylinder, and the handle is mounted on a swing fulcrum of the handle. In the hydraulic cylinder device, a pinion that integrally rotates with the pinion is provided, the pinion is disposed below the pinion, and a rack that is connected to the piston rod of the cylinder in a parallel-movable manner through a connecting means is meshed with the pinion. A means for connecting the piston rod and the rack causes the piston rod to project from both ends of the cylinder, and both sides of the rack are supported by a connecting member having a lower surface slidably contacting the projecting piston rods on the upper surface of the pedestal. Further, at least the lower surface of the rack is formed flat, and the lower surface is brought into sliding contact with the upper surface of the pedestal. Hydraulic cylinder device for control.