JPH039103A - Hydraulic cylinder device - Google Patents

Abstract

PURPOSE:To prevent any damage to the inside of a cylinder due to abrasive dusts by providing connecting members on both ends of a rod projected from the cylinder, thereby supporting a rack rod outside the cylinder, and mating the rack rod with a pinion provided to a band-operating handle. CONSTITUTION:A rod 8 provided to a piston of a cylinder 2 is projected from the cylinder on both sides, to which connecting members 9 are fixed, and a rack rod 10 is fixed to the connecting members 9 so as to be situated outside the cylinder 2. On the one hand, a pinion 11 provided to a rotary shaft 12 of a hand-operating handle 13 is mated with the rack rod 10. Thus, since the rack rod 10, the pinion 11 having possibility of generating abrasive dusts are situated outside the cylinder 2, no damage to the function of the cylinder 2 due to abrasive dusts can occur, and thereby the hydraulic cylinder can be easily replaced and cheaply manufactured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention normally operates a piston with the hydraulic pressure of a hydraulic circuit, and if necessary, releases the hydraulic pressure of the hydraulic circuit to unload the inside of the cylinder. The present invention relates to a hydraulic cylinder in which the piston can be manually operated by unloading, and in particular to an improvement in the manual operation mechanism.

[Prior Art] Conventionally, as shown in FIG. 4, a manual operating mechanism for a hydraulic cylinder of this type involves inserting two pistons 3 into a cylinder 3, connecting both pistons 3 with a rack rod 10, and connecting the two pistons 3 with a rack rod 10. A structure in which a pinion of a manual handle 13 supported by a cylinder 2 is engaged with a rod 10 is known.

[Problems to be Solved by the Invention] The above-mentioned hydraulic cylinder device is used, for example, for cover control of the engine of a small fishing boat or for clutch control for forward and backward movement, and usually the piston is moved by hydraulic pressure. The engine and clutch are controlled via cables connected to the hydraulic pump, but when the hydraulic pump breaks down, it is necessary to manually operate the piston and operate the engine and clutch. The above-mentioned manual operation mechanism is always provided in the hydraulic cylinder device.

In addition, the manual operation mechanism described above moves the rack rod 10 meshed with the binion 11 by rotating the manual handle 13 to operate the piston, but the problem is that the rack rod 10 and the pinion 11 are is housed in the cylinder 2 as shown in the figure, so there is no place for the abrasion powder generated by the meshing of the rack rod 10 and the pinion 11 to escape, so this abrasion powder enters the O-ring part of the piston in a biting manner. However, there were problems such as wear or damage to the O-ring, resulting in oil leakage.

Therefore, the object of the present invention is to expose the rack rod and the pinion that engages with the rack rod to the outside of the cylinder by a simple and rational means, thereby solving the above-mentioned problems that have arisen in the prior art. be.

[Means for Solving the Problems] The configuration of the present invention for achieving the above object is to connect a hydraulic circuit connected to a hydraulic pressure supply device to both end ports of a cylinder into which a piston is inserted via an electrode switching valve, and In the hydraulic cylinder device, a bypass valve is connected to the hydraulic circuit, and the piston is made operable by operating a manual handle connected to the piston when hydraulic pressure in the cylinder is unloaded by opening the bypass valve. and the manual handle, the rods are connected to both sides of the piston so that the rods protrude outward from both ends of the cylinder, connecting members are respectively attached to the protruding rod portions, and rack rods are attached to both connecting members. Summary of a hydraulic cylinder device characterized by having both ends parallel to the cylinder and exposed to the outside of the cylinder to be supported, and the rack rod meshing with a binion of a manual handle provided in the cylinder so as to be swingable. That is.

[Example 1 shows a cylinder support pedestal. A cylinder 2 is horizontally fixed on this support pedestal 1, a piston 3 is inserted into this cylinder 2, and a hydraulic circuit is connected to both end ports of the cylinder 2. One end of conduit A and conduit B are communicated with each other, and the conduits A and B are communicated with an electromagnetic switching valve 4, which constitutes a hydraulic pressure supply device via an oil supply pipe C. It is connected to a hydraulic pump 5, which is in open communication with an oil tank 6 via a suction pipe.

In addition, in the middle of the above-mentioned conduits A and B, branch pipes A, B,
A bypass valve 7 is connected via.

E is a hydraulic return pipe.

Therefore, the gist of the present invention is to connect rods 8 to both sides of the piston 30 and connect the rods 8 to the cylinder 2.
Both ends of the rack rod 10 are made to protrude outward, and thick plate-shaped connecting members 9 are attached at right angles to the protruding rod portions, and both ends of the rack rod 10 are attached to both connecting members 9 parallel to the cylinder 2.
The rack rod 10 is exposed to the outside and fixedly supported.
A manual handle 13 is attached to a rotating shaft 12 that supports the binion 1 which is engaged with the binion 11 provided on the outer surface of the cylinder 2.

The rack rod 10 has a rectangular cross section, and the bottom surface of the rack rod 10 is in sliding contact with the support base 1. Further, the bottom surface of the connecting member 9 is also in sliding contact with the support base 1.

In addition, 14 is a potentiometer that detects the amount of movement of the piston attached to the connecting member. In this example, a remote control device is connected to this potentiometer via a lead wire 15, and the hydraulic pump 5 is controlled by remote control. , as well as the electromagnetic switching valve 4.

Further, a wire 16 is connected to the manual handle 13 via a connecting piece 17, and this wire 16 is connected to an engine or the like provided at a remote location (not shown).

[Function] Normally, when the hydraulic pump 5 is driven, oil in the oil tank 6 is sucked through the suction pipe, passes through the oil supply pipe C, enters the electromagnetic switching valve 4, and enters the electromagnetic switching valve 4 on the side switched by the electromagnetic switching valve 4. Conduit A
, or one side chamber of cylinder 2 through B, or
It flows into the other side chamber, moves the piston 3 to the left or right in the figure, and as a result of this movement, the connecting member 9 and the rack rod 10 supported by it move, so the manual handle 13 also swings. This swing causes the wire 16 to be pulled or
It is released and controls the engine cover etc.

Therefore, if it becomes necessary to manually operate the piston 3 due to an electrical failure, etc., the bypass valve 7 is closed, thereby cutting off the flow of oil into the cylinder 2 and leaving the cylinder 2 in an unloaded state. becomes.

In this unloaded state, by lightly operating the manual handle 13 by hand, the engine cover etc. can be controlled.

[Effects of the Invention] As described above, according to the present invention, the piston is normally operated by the hydraulic pressure of the hydraulic circuit, and the piston can be operated by a manual handle due to an electrical failure, etc., as in the conventional case. In particular, in the present invention, a pinion provided on the manual handle for operating the piston;
Since the rack rod that engages with the binion is exposed to the outside of the cylinder, the abrasion powder generated by the engagement of the rack rod and the binion does not accumulate in the cylinder as in the conventional case, and this accumulation can be prevented. The problem of wear and damage to the O-ring of the piston caused by this can be completely eliminated.

Furthermore, if the rack rod or pinion wears out, these parts are exposed to the outside, so they can be easily replaced, which is extremely effective in terms of maintenance, compared to conventional hydraulic cylinders of this type It has excellent features that cannot be expected in other devices.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of the hydraulic cylinder device, FIG. 2 is a partially cutaway side view of the same, FIG. 3 is a sectional view of a portion of the same cylinder, and FIG. 4 is an explanatory diagram of a conventional example. A, B, C, D, E...Hydraulic circuit, 2...Cylinder 3...Piston, 5...Hydraulic pressure supply device, 7...
・Bypass valve, 8...rod, 9...connecting member,
10... Rack rod, 11... Binion, 13.
・Manual handle. Patent Application Applicant Katsutane Komatsu Agent Yoshio Sano Figure 2 Figure Figure 2

Claims (1)

[Claims] A hydraulic circuit connected to a hydraulic pressure supply device is connected to both end ports of the cylinder into which the piston is inserted via an electrode switching valve, and a bypass valve is connected to the hydraulic circuit, and the hydraulic pressure inside the cylinder is controlled by opening the bypass valve. In a hydraulic cylinder device in which the piston can be operated in an unloaded state by operating a manual handle connected to the piston, the means for connecting the piston and the manual handle connects rods to both sides of the piston to connect the rod to the cylinder. A connecting member is attached to each of the protruding rod portions, and both ends of the rack rod are supported by both connecting members in parallel with the cylinder and exposed to the outside of the cylinder. A hydraulic cylinder device characterized in that a pinion of a manual handle provided in a swingable manner is engaged with the cylinder.