JPH08247382A - Fixing device for internal combustion engine - Google Patents

Abstract

PURPOSE: To facilitate the fixing work of an internal combustion engine which is vibration-proofedly supported. CONSTITUTION: A fixing device for an internal combustion engine can fix fixing members 2 (21-24) provided at the four spots of an engine 200 which is vibration proofedly supported on a hull 100 through a vibration-proof rubber 1, and has four sets of hydraulic cylinders 3 (31-34) provided in correspondence to the fixing member; one set of an oil pressure generating cylinder 4 to generate oil pressure for actuating the above cylinders; and four pieces of connecting tubes 5 (51-54) which connect each of hydraulic cylinders 31-34 to the oil pressure generating cylinder 4 and are about the same in length. Thus the one oil pressure generating cylinder 4 is operated to uniformly actuate the four hydraulic cylinders 3 for fixing the engine at a normal position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine fixing device for fixing fixed parts provided at a plurality of locations of an internal combustion engine vibration-supported.

[0002]

2. Description of the Related Art An internal combustion engine is often vibration-isolated and supported via a spring, rubber or the like in order to prevent its vibration and noise from propagating to the surrounding environment. In this case, for example, in the case of an engine mounted on a ship, when the hull is tilted or when reduced cylinder operation is performed,
Or, when the natural vibration of the anti-vibration support resonates with the engine vibration force, the engine will tilt or vibrate greatly.Therefore, a stopper with an appropriate clearance is usually provided to limit vibration or tilt above a certain level. I am trying to do it. In addition, during severe stormy weather or reduced cylinder operation, the engine sways steadily and frequently hits the stopper.Therefore, tighten the bolts supported on the hull side and press them against the engine's installation part, etc. It is fixed to prevent the engine from becoming unstable.

However, when the hull is greatly shaken in stormy weather, it is not easy to properly fix the engine to the hull by synchronously tightening bolts at at least four positions.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems in the prior art and to provide an internal combustion engine fixing device which facilitates the work of fixing the internal combustion engine.

[0005]

In order to solve the above-mentioned problems, the present invention provides an internal combustion engine fixing device for fixing fixed parts provided at a plurality of locations of an internal combustion engine that is vibration-isolated and supported. A plurality of fluid cylinder devices provided corresponding to the number of fixed parts, the plurality of fluid cylinder devices provided with piston rods protruding from the cylinders, and arranged such that the tip end portion of the piston rod engages with the fixed parts during operation. Fluid cylinder device, one fluid pressure generating device for generating fluid pressure for operating the plurality of fluid cylinder devices, and a plurality of connecting pipes connecting the fluid pressure generating device and the plurality of fluid cylinder devices. In addition to the above, the fluid pressure generating device according to the invention of claim 2 further comprises a drive shaft and a piston. And a fluid cylinder unit, the piston is characterized in that it is driven through the spring from the drive shaft.

[0006]

According to the invention of claim 1, a plurality of fluid cylinder devices provided corresponding to a plurality of fixed parts of the internal combustion engine, and a fluid pressure generating device for generating a fluid pressure for operating them. Since the fluid cylinder device is arranged so that the tip portion of the piston rod engages with the fixed portion when the fluid cylinder device is activated, by driving the fluid pressure generating device, the fluid pressure is generated by the fluid pressure generating device. It is possible to operate the piston of the fluid cylinder device and move the piston rod to engage the tip portion with the fixed portion. As a result, the force acting from the internal combustion engine is received by the fluid pressure of the fluid cylinder device through the engaged fixed portion and the tip portion of the piston rod,
The movement of the internal combustion engine can be fixed. Here, "engaged" means that the fixed portion and the piston rod tip portion are different from each other in the internal combustion engine, such as a state in which the fixed portion has a hole and the tip portion of the piston rod is inserted therein. It is a relationship in which the movement can be almost fixed.

According to the first aspect of the invention, since the connecting pipes for connecting the fluid pressure generating device and the plurality of fluid cylinder devices are made to have substantially the same length, the fluid pressure generated by the fluid pressure generating device is It is transmitted to the fluid cylinder devices without any time difference, and the pistons of the respective fluid cylinder devices move simultaneously. As a result, the tip end portions of the respective piston rods simultaneously engage with the respective fixed portions to generate the same fixing force, so that the internal combustion engine can be fixed at the regular position. As the fluid cylinder device, a cylinder device of hydraulic pressure, water pressure, pneumatic pressure or the like can be used. Further, as the fluid pressure generating device, a cylinder device, a pump or the like that is driven manually or by a driving means such as a motor is used.

By the way, when the fluid pressure generator is a hydraulic cylinder and the piston position is fixed after the constant hydraulic pressure is generated, if the oil leaks from the gap between the cylinder and the piston, the hydraulic pressure is reduced. Rapidly decreases, and the fixing force for fixing the internal combustion engine sharply decreases.
According to the invention of claim 2, the fluid pressure generating device is a cylinder device having a drive shaft and a piston, and the piston is driven from the drive shaft via a spring. The force and the spring force balance each other, and these forces drive the plurality of fluid cylinder devices. As a result, even if the hydraulic pressure in the cylinder leaks to some extent, the spring is displaced and the spring force slightly changes to hold the fluid pressure, so that the fixing force necessary for fixing the internal combustion engine can be maintained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall schematic construction of an internal combustion engine fixing device of an embodiment, and FIGS. 2 and 3 show structural examples of a hydraulic cylinder and a hydraulic pressure generating cylinder, respectively. The internal combustion engine fixing device is a fixed portion provided at four positions as a plurality of positions of a propulsion diesel engine (hereinafter simply referred to as “engine”) 200 as an internal combustion engine vibration-supported by a vibration-proof rubber 1 on a hull 100. Fixing member 2 (21, 2)
2, 23, 24) can be fixed, and four hydraulic cylinders 3 (31, 32, 33, 34) as a plurality of fluid cylinder devices provided corresponding to the number of fixed parts,
Generates hydraulic pressure, which is the fluid pressure to operate these 1
One hydraulic pressure generation cylinder 4 as one fluid pressure generation device and four connection pipes 5 (51, 52, 52 53, 54). Code 6
Is a distribution pipe for distributing oil to each connecting pipe.

As shown in FIG. 2, the hydraulic cylinder 3 has a piston 3b hydraulically driven in the cylinder 3a and a piston rod 3c fixed to the piston 3b and protruding from the cylinder 3a. The hydraulic chamber 3d partitioned by the piston 3b in the cylinder 3a is connected to the hydraulic pressure generating cylinder 4 through the hole 3e and the connecting pipe 5. Reference numeral 3f is a return spring for pushing back the piston 3b, and 3g is a seal ring. A hole 2a is formed in the fixing member 2, and the hydraulic cylinder 3 is fixedly arranged on the hull 100 such that the tip end portion 3c-1 of the piston rod 3c enters the hole 2a during operation.

As shown in FIG. 3, the hydraulic pressure generating cylinder 4 includes a drive shaft 4b and a piston 4c in the cylinder 4a, and the piston 4c is driven from the drive shaft 4b via a spring 4d. In the present embodiment, the drive shaft 4b is rotationally driven by the manual handle 4e, and the screw portion 4f is screwed into the screw portion of the cylinder cover 4g to be advanced and retracted. However, the drive shaft 4b may be driven by a motor or the like via a torque limiter or the like. Reference numeral 4h is a spring bearing, 4
i is a return spring, 4k is a conduit for feeding the oil in the hydraulic chamber 4j, and 4m is a seal ring.

With the above-described structure, the internal combustion engine fixing device operates as follows. During normal operation of the ship,
This device is not used, and the tip portion 3c-1 of the piston rod 3c is the hole 2a of the fixing member 2 as shown by the chain double-dashed line in FIG.
In a position away from. As a result, even if the engine 200 supported by vibration isolation moves, the tip portion 3c-1 does not come into contact with the fixing member 2 by hitting a stopper (not shown) that is usually provided.

Since the engine 200 always moves greatly during a rough weather or in an emergency when the engine is operated with reduced cylinders, an internal combustion engine fixing device is used to prevent this and to ensure safety. At this time, the operator rotates the handle 4e of the hydraulic pressure generating cylinder 4 installed in a place with good workability. This work can be easily done. This allows the screw 4
As f progresses, the drive shaft 4b compresses the spring 4d, the spring force is transmitted to the piston 4c, hydraulic pressure is generated in the hydraulic chamber 4j, and oil is sent to the conduit 4k and is transmitted. This oil is introduced from the distribution pipe 6 into the hydraulic chambers 3d of the respective hydraulic cylinders 3 (31 to 34) via the four connecting pipes 5 (51 to 54) and presses the piston 3b. in this case,
Since all the connecting pipes 51 to 54 have substantially the same length, oil is uniformly introduced into the hydraulic chamber 3d of each hydraulic cylinder, and the same hydraulic pressure is generated. And the piston rods 3c fixed to the respective pistons 3b
Travel at the same speed and for the same distance, and their respective tip portions 3c-1 engage the pressing member 2 simultaneously and evenly and press it. As a result, each hydraulic cylinder 31-
At 34, the engine 200 can be fixed in a normal position.

When the engine 4 is fixed with sufficient force by rotating the handle 4e and compressing the spring 4d to generate hydraulic pressure, the handle 4e is left in that state. In this case, if the screw 4f has an appropriately small pitch, even if a reaction force from the spring 4d is applied to the drive shaft 4b, the screw will not be reversed by the frictional force of the screw surface, and therefore the drive shaft 4b will be pushed back. It will not be done. However, considering the movement of the handle 4e due to vibration of the hull, etc.,
May be locked by any suitable means. In addition, even if the oil in the hydraulic chamber 3d or 4j slightly leaks,
Since the piston 4c is pushed by the spring 4d,
The hydraulic pressure in the hydraulic chamber does not drop suddenly. Therefore, the required engine fixing force can be maintained for a certain period. In this case, if the working fluid is oil as in this embodiment, the viscosity thereof has the effect of minimizing the leakage.

According to such a device, the engine can be quickly fixed at an appropriate position under an easy work with an extremely simple structure.

In the above, the fixing members 2 are provided at four places and
Although the engine is fixed at points, the number of fixing members may be increased if necessary. Further, the fixing member can be provided not only on both sides of the engine but also in the front-rear direction. Further, the engine may be fixed not only on the same plane but also at a plurality of vertical positions. In this case, not only the engine installation base portion but also the engine upper casing may be fixed at an appropriate position. According to the present invention, since the hydraulic pressure can be generated in one place and can be transmitted evenly, it is extremely easy to increase the number of fixed positions of the engine in this way.

Further, in this embodiment, the engaging portion is formed into a concave and convex fitting shape so that all the three-dimensional displacement and three-dimensional rotation of the engine can be fixed. Since it is small, if it is not necessary to fix it, the fixing member may be formed into a lateral groove. Furthermore,
When the fixing member and the tip of the piston rod are contacted with mutually parallel parallel planes, and the contact surface is knurled to increase the frictional force, and various movements of the engine can be fixed by the surface pressure and the frictional force. There is also. With such an engaged state, the accuracy with which the hydraulic cylinder is installed on the hull can be eased. Therefore, as the structure of the engagement portion, an appropriate method is adopted in consideration of the degree of engine fixation required in an actual ship.

As the fluid pressure generator, instead of a hydraulic cylinder, a device including a water pump, an oil pump and a pressure adjusting valve, or air generated by an air pump or compressed air in a ship is supplied through the pressure adjusting valve. It is also possible to use an air supply device or the like. Although the case where the internal combustion engine fixing device is applied to the engine of a ship has been described above,
The present invention is also applicable to a land-based internal combustion engine or the like.

[0019]

As described above, according to the present invention, in the first aspect of the present invention, the fluid cylinder device, the fluid pressure generating device, and the connecting pipes having substantially the same length for connecting these are provided. With a simple structure, the engine can be easily and quickly fixed at an appropriate position. According to the invention of claim 2, in addition to the above, the fluid pressure generating device is a fluid cylinder device, and the piston is driven from the drive shaft via a spring, so that the hydraulic pressure is maintained even if there is some oil leakage. The force required to fix the internal combustion engine can be maintained.

[Brief description of drawings]

FIG. 1A and FIG. 1B are explanatory views schematically showing a state in which an internal combustion engine fixing device of an embodiment is applied to an engine, in a front view and a plan view, respectively.

FIG. 2 is a sectional view showing a structure of a hydraulic cylinder portion of the internal combustion engine fixing device.

FIG. 3 is a sectional view showing a structure of a hydraulic pressure generating cylinder portion of the internal combustion engine fixing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Anti-vibration rubber (anti-vibration support) 2 (21-24) Fixed member (fixed part) 3 (31-34) Hydraulic cylinder (fluid cylinder device) 3a Cylinder 3c Piston rod 3c-1 Tip part 4 Oil pressure generation cylinder (Fluid pressure generator) 4b Drive shaft 4c Piston 4d Spring 5 (51-54) Connection pipe 200 Engine (internal combustion engine)

Claims (2)

[Claims] 1. An internal combustion engine fixing device for fixing fixed parts provided at a plurality of locations of an anti-vibration internal combustion engine, wherein a plurality of fluid cylinders are provided corresponding to the number of the fixed parts. A plurality of fluid cylinder devices that are arranged so that a tip portion of the piston rod engages with the fixed portion during operation, the device including a piston rod protruding from a cylinder; and operating the plurality of fluid cylinder devices. One fluid pressure generating device that generates fluid pressure, and a plurality of connecting pipes that connect the fluid pressure generating device and the plurality of fluid cylinder devices and have substantially the same length. An internal combustion engine fixing device having. 2. The fluid pressure generating device is a fluid cylinder device including a drive shaft and a piston, and the piston is driven from the drive shaft via a spring. Internal combustion engine fixing device.