JP3112669B1 - Hydraulic pushing device - Google Patents

Abstract

The present invention provides a hydraulic push-in device in which a coupling or the like can be easily pushed into a propeller shaft, and further, the shaft and a pipe can be easily screwed together. A device for pushing a fitting body into a propeller shaft having a tapered end portion, comprising: a backing member arranged at a fixed distance from the propeller shaft; and a pair of members arranged between the backing member and the fitting body. And a slide member. The pair of slide members form a hydraulic chamber between the first slide member and the second slide member, and exert a force in opposite directions so that the first and second annular bodies are separated by hydraulic pressure. Push the fitting into the propeller shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic push-in device for pushing a fitting body such as a propeller and a coupling into a propeller shaft of a ship and fitting the fitting body.

[0002]

2. Description of the Related Art In a ship using a propeller (screw) that rotates in water to obtain propulsion, an internal combustion engine such as a diesel engine is used as a power source for rotating the propeller. This motion of the internal combustion engine is converted into a rotary motion about the axis of the power shaft. The propeller shaft on which the propeller is mounted and the power shaft are connected by a coupling or the like, and the propeller is given rotational motion by a power source to bring propulsion to the ship. The transmission of the rotational movement of the power shaft to the propeller shaft is realized by a frictional force between tapered surfaces of the coupling connected to the power shaft and the propeller shaft.

[0003]

SUMMARY OF THE INVENTION In small boats,
Conventionally, the operation of fitting the coupling to the tapered portion of the propeller shaft has been performed manually. When the coupling is manually moved to the tapered portion of the propeller shaft and fitted at a predetermined position, a large force is required. For this reason, the coupling between the propeller shaft and the coupling has been usually performed using a tightening nut. For the rotation of this tightening nut,
A method of hitting a handle portion of a wrench fitted with a tightening nut with a hammer is used. Since this work requires skill and a great deal of labor, there has been a strong demand from customers for the development of a mechanism that does not require such pushing work. In addition, a propeller, which is a fitting body, is fitted to an end of the propeller shaft on the propeller side. Cost me.

Therefore, an object of the present invention is to make it possible to easily push a fitting body such as a coupling into a propeller shaft,
It is still another object of the present invention to provide a hydraulic push-in device that can easily screw a female screw into a male screw at the tip of a propeller shaft.

[0005]

SUMMARY OF THE INVENTION A hydraulic pushing device according to the present invention is a device for pushing a fitting body into a propeller shaft of a marine vessel having a tapered end, and a backing having a constant distance from the propeller shaft. Forming a hydraulic chamber between the member and the first and second slide members;
The first slide member and the second slide member are disposed between the backing member and the fitting body, and the first slide member and the second slide member exert forces by hydraulic pressure in opposite directions so as to be separated from each other along the axial direction of the propeller shaft. Is pressed against the backing member, and the second slide member includes a pair of slide members that are pressed against the fitting body to push the fitting body into the propeller shaft.

With this configuration, the backing member functions as a stopper for the first slide member and generates a reaction force against the hydraulic pressure, thereby applying a pushing force to the fitting body to the second slide member. It is desirable that the pair of slide members be disposed axially symmetrically around the propeller shaft. However, as long as the pushing is performed smoothly, it is not necessarily required to be disposed axially symmetrically. Also, a plurality or a single object may be used. Further, the distance between the backing member and the propeller shaft may be constant in one phase of the pushing, and is preferably a structure that can be changed according to the phase of the operation. As a result of the above structure, the pushing operation can be easily performed using simple means such as a manual hydraulic pump, and a great deal of labor and skill can be saved.

In the above-described hydraulic pushing device, when it is important to store the means for keeping the distance between the backing member and the propeller shaft constant in a narrow place, or in other cases, the inner peripheral portion at one end is used. And a pipe body having a female screw with which a male screw provided at the tip of the propeller shaft is screwed, and a male screw with which a backing member is screwed with the outer peripheral portion at the other end.

[0008] According to the above configuration, the propeller shaft and the backing member are connected to both ends of the common pipe, and a certain distance can be secured in one stage of pushing to generate a reaction force against hydraulic pressure. This configuration is very compact and can be easily housed in a small space around the connection between the propeller shaft and the power shaft of a small boat. That is, even in a narrow environment in which a pushing operation cannot be performed by bringing in a hydraulic jack or the like, the same effect as that obtained by using the hydraulic jack can be obtained.

In the above-mentioned hydraulic pushing device, when it is important to generate a large pushing force by making the configuration of the pair of sliding members axially symmetric, or in other cases, the pair of sliding members are attached to the outside of the tube. The first to be fitted to
And a second annular body that covers the outer periphery of the first annular body, a first seal portion provided between the first annular body and the second annular body, and a second annular body. A hydraulic chamber is formed between the seal portion and the hydraulic chamber, and a wall surface of the hydraulic chamber includes a surface having a component extending in a direction intersecting the propeller shaft axis.

[0010] The hydraulic pressure acting on the wall surface of the hydraulic chamber generates a pressure component parallel to the axial direction of the pipe, and generates pressure in a direction to separate the two annular members constituting the hydraulic cylinder from each other. It is pressed against the member. Also, the other annular body moves in the direction of the fitting body (coupling, propeller, etc.) due to the reaction force and generates a force for fitting the fitting body to the propeller shaft. This force occurs uniformly in a ring around the central axis of the propeller shaft. As a result, the fitting body can be pushed into the propeller shaft by using a manual hydraulic pump or the like without requiring any skill or a great deal of labor. Also, since it can be fitted to the outer circumference of the tube,
It can be stored in a very narrow space. As a result, it can be mounted not only on newly built ships but also on existing small ships without affecting other structures. It is sufficient that the cylinder stroke at the time of this pushing is 5 mm at the maximum, usually about 0.5 to 2.0 mm. The small stroke of the cylinder also makes the present device compact and easy to mount on a small boat or the like having only a small space.

In the above-described hydraulic press-in device, when it is important to facilitate the rotation of the tube by simple means, or in other cases, both end surfaces are provided on the end surface of the tube and the end surface of the backing member. Are provided with a continuous keyway so as to form a substantially common plane, and the key is fixed so as to fill at least the keyway at the interface between the tubular body and the backing member.

The outer diameter of the backing member is larger than the tube,
Since the diameter is increased, the same moment can be generated with a small force, thereby facilitating the rotation operation of the tube when screwing with the propeller shaft. Since the position of the backing member in the tube where the engagement by this key is established is different from the position where the hydraulic pressing device is operated, after the rotation operation described above is completed, the engagement is released and the backing member is hydraulically pressed. Relocate to the optimal position for operation.

[0013]

(Embodiment 1) FIG. 1 is a sectional view showing a configuration of a hydraulic press-in device according to Embodiment 1. In FIG. 1, a propeller shaft 2 and a power shaft (not shown) are fastened by bolts and nuts (both not shown) near the flange 1a of the coupling. The coupling 1 has a tapered end 2b of a propeller shaft 2 whose outer diameter decreases toward the end.
The tapered portion 1b provided on the inner peripheral surface is fitted so as to cover the outer periphery of the. A female screw 3a provided on the inner surface at one end of the tubular body 3 is screwed into a male screw 2c provided on the side peripheral surface of the distal end portion 2a of the propeller shaft 2. An external thread 3b is provided on the outer peripheral surface of the other end of the tubular body 3.
The external thread 3b is screwed with the nut 4 as a backing member . The hydraulic cylinder 15 is used for the pipe 3
And is arranged between the nut 4 and the coupling 1 which is a fitting body. This hydraulic cylinder 15
Has a first annular body 5 and a second annular body 6, and O-ring grooves 12 and 13 are provided on the outer periphery of the first annular body 5. Further, the second annular body 6 is provided with an oil port 11 through which hydraulic pressure from a hydraulic pump is introduced, and a hydraulic path communicating with the hydraulic chamber 10 between the O-ring grooves 12 and 13 into which the O-ring is fitted. Is formed.

Next, the operation of the hydraulic pressing device when hydraulic pressure is applied will be described. First, the nut 4 is disposed at the end of the tube so that the end surface thereof is aligned with the tube 3, and the hydraulic cylinder 15 is in a state having a gap between the coupling 1 and the nut 4. In such a state, the pipe 3
Is rotated around the pipe axis, and the external thread 2 of the propeller shaft is
The female screw 3a of the tube is screwed into c.

Next, the nut 4 is moved to a position convenient for pushing the coupling of the hydraulic cylinder 15 , and
Place it . This position is
Between the propeller shaft and the nut 4 as the backing member
This is a position where the distance does not change and is kept constant. At this time, it is considered that the stroke of the hydraulic cylinder is at most 5 mm, usually in the range of 0.5 to 2.0 mm. Male screw 2c of propeller shaft according to the progress of pushing
An operation of screwing the female screw 3a of the tubular body is performed, but the description is omitted. When the hydraulic pump operates and the pressure in the hydraulic chamber 10 increases, the first annular body 5 is pressed against the nut 4,
The second annular body 6 receives the reaction force and is pressed against the flange 1a of the coupling. The nut 4 receives the above oil pressure, presses the second annular body 6 against the flange 1a of the coupling, and moves the coupling 1 along the axial direction of the propeller shaft 2. The moving distance of the second annular body in the tube axis direction at this time is 5 mm at the maximum, and is actually about 0.5 to 1.5 mm. After the coupling 1 is completely pushed into the propeller shaft 2, the flange 1a of the coupling and the flange (not shown) of the power shaft are fastened by bolts and nuts.

In the case of a propeller shaft that uses M56P3 for the tube, SCM435H is used for the cylinder,
As the hydraulic pump, a manual pump having a maximum working pressure of 720 kgf / cm ² equipped with a hydraulic gauge and having a hose of about 2 m, and M80P3 made of SS400 is used as a nut. When the pressure receiving area of the hydraulic cylinders 15 and 82cm ^2, when the reading of the hydraulic gauge 500kgf / cm ^2, 4
0 tons of pushing force can be generated.

This pushing force is large enough to push the coupling into the propeller shaft. By installing a compact and large force hydraulic push-in device with the above configuration in a narrow space, it is easy to connect the propeller shaft and the power shaft, which conventionally required skill and great effort. Becomes possible.

(Embodiment 2) FIG. 2 is a sectional view showing a configuration of a hydraulic press-in device according to Embodiment 2. The configuration of FIG. 2 differs from that of FIG. 1 in that the fitting is a propeller 21 in FIG. 2, and a washer 22 is inserted between the hydraulic cylinder 15 and the fitting (propeller).
Further, among the annular members constituting the hydraulic cylinder 15,
Is pressed against the fitting body 21. Other configurations are the same as those in FIG. Therefore, if members having the same dimensions as those of the first embodiment are used, also in the second embodiment, for example, when reading the hydraulic gauge 500 kgf / cm ² of the manual pump, a pushing force of 40 tons is applied to the propeller 21. be able to.

By using the hydraulic press-in device of the present embodiment, it is possible to easily perform a fitting operation of a propeller, which conventionally requires skill and a great deal of labor, using a manual hydraulic pump or the like.

(Embodiment 3) FIG. 3 is a perspective view showing a means for facilitating a rotation operation of screwing a tube to a shaft in a hydraulic press-in device according to Embodiment 3. In FIG. 3, the end face of the tube is aligned with the face of the nut 4,
In this state, continuous grooves 31 and 32 are provided between the two. A screw hole 33 is provided in the nut 4, and a butterfly bolt (screw) 36 for attaching a key 35 extending between the nut 4 and the tube 3 is screwed into the screw hole 33. In FIG. 3, the key is attached to only one of the grooves, but the key 35 is attached to both key grooves by a butterfly bolt 36 when performing an operation. With the key attached over the nut and tube, the tube 3 and nut 4
Is integrated in the rotating operation of the tube for screwing the tube to the propeller shaft. As a result, the rotating operation of the tube 3 can be facilitated. Furthermore, if the bar insertion hole 34 is provided in the outer peripheral portion of the nut 4 and a bar is inserted into the bar insertion hole and used as a handle, the above-described rotation operation can be further facilitated. After screwing the tube 3 to the tip of the propeller shaft by using such means, as described in the first embodiment, the nut is located at a position convenient for fitting the fitting to the propeller shaft. Move 4. Thereafter, an operation of pushing the fitting body into the propeller shaft by operating a hydraulic pump or the like is performed.

By using the above-mentioned means for integrating the tube and the nut in the rotating operation, the screwing operation between the tube and the propeller shaft, which conventionally required skill and labor, can be easily performed with a small force. Will be able to do it.

Although the embodiments of the present invention have been described above, the embodiments of the present invention disclosed above are merely examples, and the scope of the present invention is limited to these embodiments. Not done. The scope of the present invention is shown by the description of the claims, and further includes all modifications within the meaning and scope equivalent to the description of the claims.

[0023]

According to the present invention, the coupling or the propeller can be easily pushed into the propeller shaft using hydraulic pressure even in a small space of a small boat. In addition, the operation of rotating the tube for screwing the tube to the tip of the shaft can be facilitated by means for integrating the tube and the nut when rotating. As a result,
It is possible to easily connect the propeller shaft and the power shaft, which require skill and a great deal of labor, in a short time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a hydraulic pressing device according to a first embodiment.

FIG. 2 is a cross-sectional view illustrating a configuration of a hydraulic pressing device according to a second embodiment.

FIG. 3 is a sketch showing a means for facilitating a rotating operation of screwing a pipe to a shaft in a hydraulic press-in device according to a third embodiment.

[Explanation of symbols]

1 Coupling, 1a Coupling flange,
1b Taper portion of coupling, 2 propeller shaft, 2a propeller shaft male screw portion, 2b propeller shaft taper portion, 2c male screw at tip of propeller shaft, 3 pipe, 3a pipe female screw section, 3b pipe male screw section, 4 nut, 5 first ring, 6 second ring, 1
0 Hydraulic chamber, 11 Oil port, 12, 13 O-ring groove, 1
5 hydraulic cylinder, 21 propeller, 22 washer, 31
Nut keyway, 32 pipe keyway, 33 key mounting screw hole, 34 handlebar insertion hole, 35 key, 36 key mounting screw (butterfly bolt)

Claims (4)

(57) [Claims] 1. A pushing device for pushing a fitting body into a propeller shaft of a marine vessel having a tapered end, comprising: a backing member maintained at a constant distance from the propeller shaft; a first sliding member; A hydraulic chamber is formed between the first sliding member and the second sliding member. The first sliding member and the second sliding member are disposed between the backing member and the fitting body by hydraulic pressure. The first slide member is pressed against a backing member, and the second slide member is pressed against the fitting body, and the fitting body is pressed by the propeller. A hydraulic pressing device comprising: a pair of slide members for pressing into a shaft. 2. An inner peripheral portion at one end has a female screw into which a male screw provided at the tip of the propeller shaft is screwed, and an outer peripheral portion at the other end has a male screw into which the backing member is screwed. The hydraulic pushing device according to claim 1, further comprising a tube. 3. The pair of slide members include a first annular body fitted to the outside of the tubular body and a second annular body covering an outer periphery of the first annular body. A hydraulic chamber is formed between a first seal portion and a second seal portion provided between the annular body and the second annular body, and a wall surface of the hydraulic chamber is in a direction intersecting the propeller shaft axis. 3. The hydraulic pusher of claim 2 including a surface having a component extending therethrough. 4. An end face of the tubular body and an end face of the backing member are provided with a continuous keyway in a state where the two end faces form a substantially common plane, and at least the keyway between the tubular body and the backing member is provided. The hydraulic pressing device according to claim 2, wherein a key is fixed so as to fill the key groove at an interface.