JPH0312640Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a propeller nut attachment device for attaching a propeller nut to a propeller shaft of a ship or the like.

Conventionally, the means for installing propeller nuts on ships is as follows:
As shown in Figures 1 and 2, after press-fitting the screw propeller 2 onto the propeller shaft 1, first, using an L-shaped nut mounting jig 3 with three nylon rollers 5 attached to the tip, propeller nut 4,
The roller 5 is engaged with the threaded valley on the inner periphery of the propeller shaft 1, and the propeller shaft 1 is lifted up and transported to a threaded portion formed at the end of the propeller shaft 1.

A rope (not shown) is wound around the outer periphery of the propeller nut 4, and by pulling this rope manually, the propeller nut 4 is rotated and tightened onto the propeller shaft 1.

However, with such a propeller nut mounting means, dust may fall and adhere to the female threaded part of the propeller nut 4 or the male threaded part of the rear end of the propeller shaft 1, or wear pieces of the roller 5 of the nut mounting jig 3 may Since it adheres to the threaded part on the inner circumference of the propeller nut 4, it may cause the thread to seize.

In addition, since the propeller nut 4 is supported only by the rollers 5 of the nut mounting jig 3, the transportation work of the propeller nut 4 is unstable, and it is difficult to align the 4th axis of the propeller nut with the 1st axis of the propeller shaft. There is a problem that it is difficult to adjust the position.

Furthermore, when tightening the propeller nut 4 onto the propeller shaft 1, if the load of the propeller nut 4 is transferred from the nut mounting jig 3 to the propeller shaft 1 side, a large force is required to rotate the propeller nut 4. There are also points.

The present invention aims to solve these problems by preventing dirt from entering the female threaded part of the propeller nut and the male threaded part of the rear end of the propeller shaft, thereby ensuring stability when transporting the propeller nut. Another object of the present invention is to provide a propeller nut mounting device that facilitates the alignment of the propeller nut and the propeller shaft and saves labor in the propeller nut mounting work.

Therefore, the propeller nut mounting device of the present invention consists of a ring-shaped inner casing with a propeller nut holding part on the inner periphery, and an outer casing that rotatably supports the inner casing. In order to adjust its posture, there is a fixed piece attached to the upper part of the outer casing, and a lifting/tilting device that is pivotally supported by the fixed piece and can rotate around a horizontal axis that is perpendicular to the rotational axis of the inner casing. An outer casing support adjustment mechanism is provided, which includes an adjustment piece and an adjustment member that drives the lower end of the lifting/tilting adjustment piece to rotate it relative to the fixed piece, and the rear end of the propeller shaft is provided in the outer casing. The feature is that a cover is provided to prevent dust from falling, which can cover the male threaded portion of the device.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings. Figures 3 to 6 show a propeller nut mounting device as a first embodiment of the present invention. Figure 3 is a front view thereof, and Figure 4 is a front view thereof. 3 is a sectional view taken along the - arrow in FIG. 3, FIG. 5 is a sectional view taken along the - arrow in FIG. 3, and FIGS. On both inner side surfaces of the annular outer casing 11 having a gate-shaped cross-section,
A plurality of sets (four sets in this device) of opposing rollers 20, 20 are rotatably attached, and the cylindrical inner casing 12 has two rails 21, 21 formed on its outer periphery and rollers. 20, 20 are rotatably held within the outer casing 11 by engaging with each other.

In addition, a fixed piece 1 is attached to the upper part of the outer casing 11.
4 is attached to the fixing piece 14, and a dogleg-shaped lifting/tilting adjustment piece 13 having a bite fitting 13a at the lower end is pivotally supported by a horizontal pin 14a. 13 is rotatably provided around a horizontal axis that is perpendicular to the rotational axis of the inner casing 12.

Furthermore, inside the fixed piece 14, a sliding piece 15 is provided.
is held so as to fit into the recess 15a and engage with the metal fitting 13a, and the sliding piece 15 is positioned and fixed by adjusting bolts 16a and 16b.

These lifting/inclination adjustment piece 13, fixed piece 14, and sliding piece 1 as an adjustment member
5 and adjustment bolts 16a and 16b constitute an outer casing support adjustment mechanism.

Incidentally, an opening 13b is formed at the upper end of the lifting/inclination adjusting piece 13, through which a wire (not shown) for lifting the entire outer casing 11 is passed.

In addition, a bellows-type cover 1 for preventing dust from falling that can cover the male threaded part of the rear end of the propeller shaft 1 (see Figure 1) is provided.
7 is mounted with one end supported by a mounting piece 18 on the upper part of the outer casing 11.

On the other hand, the inner casing 12 is different from the outer casing 11.
The bellows-type cover 17 for preventing dust from falling is formed to protrude from the end opening on the opposite side to the attachment side end, and flanges 22, 22a are provided on the outer periphery of the protruding portion of the inner casing 12.

Furthermore, between the two rails 21, 21 on the outer periphery of the inner casing 12, a plurality of (four in this device)
A propeller nut fixing bolt 23 is provided to penetrate from the outside of the inner casing 12 toward the inside through an adapter 23a.

Since the propeller nut attachment device of the present invention is constructed as described above, when attaching the propeller nut 4 to the propeller shaft 1 (see Fig. 1), first,
The end surface 4a of the propeller nut 4 that comes into contact with the propeller shaft 1 is on the side where the bellows-type cover 17 for preventing dust from falling is attached to the outer casing 11, and the axis of the propeller nut 4 is aligned with the axis of the inner casing 12. The propeller nut 4 is positioned and fixed inside the inner casing 12 by the nut fixing bolt 23 and the adapter 23a so as to match.

Note that propeller nuts of various diameters can be fixed to the inner casing 12 by removing or replacing the adapter 23a.

After positioning and fixing the propeller nut 4, the opening 13b of the lifting and tilting adjustment piece 13 is
The entire outer casing 11 together with the inner casing 12 holding the propeller nut 4 is lifted up by a wire (not shown) passed through the propeller shaft 1 and transported to the position of the propeller shaft 1, so that the propeller shaft 1 and the end surface 4a of the propeller nut 4 face each other. Place it like this.

Therefore, as shown in FIGS. 6a to 6c, the biting hardware 13 at the lower end of the lifting and tilting adjustment piece
Adjust the entire outer casing 11 so that the axes of the propeller shaft 1 and the propeller nut 4 are parallel to each other according to the inclination of the ship using adjustment bolts 16a and 16b which are driven and rotated through the sliding piece 15. Make fine adjustments to the inclination (posture).

The procedure for this fine adjustment is to start from a state where the axis of the propeller nut 4 is horizontal as shown in Fig. 6b,
By loosening one adjustment bolt 16a and tightening the other adjustment bolt 16b, the sliding piece 15 is moved, and the biting metal fitting 13a that engages with the recess 15a of this sliding piece 15 is moved, thereby lifting and tilting the sliding piece 15. Adjustment piece 13 is rotated around horizontal pin 14a.

As a result, the axis of the propeller nut 4 is located at the sixth
As shown in Figure a, the end face 4a of the propeller nut 4
Tilt it so that it points upwards.

Conversely, by tightening the adjustment bolt 16a and loosening the adjustment bolt 16b, the axis of the propeller nut 4 is tilted so that the end surface 4a of the propeller nut 4 faces downward, as shown in FIG. 6c. be able to.

After aligning the axes of the propeller nut 4 and the propeller shaft 1 in this way, the propeller nut 4 and the propeller shaft 1 are brought into contact with each other, and the area around the threaded portion of the propeller shaft 1 is closed using the bellows-type cover 17 for preventing dust from falling. cover.

Then, the flanges 22, 2 of the inner casing 12
By winding a rope (not shown) between 2a and pulling the rope manually, the propeller nut 4 is rotated together with the inner casing 12, and the propeller nut 4 is tightened onto the propeller shaft 1.

Incidentally, as the inner casing 12 rotates and the propeller nut 4 is tightened, the bellows-type cover 17 for preventing dust from falling is pressed toward the outer casing 11 and folded.

Next, a description will be given of a propeller nut mounting device as a second embodiment of the present invention. FIG. 7 is a perspective view thereof, and has almost the same structure as the first embodiment. 12
The flanges 22, 22a of the first embodiment are not provided on the outer periphery of the protrusion, and a gear 25 is formed. are becoming interlocked.

Therefore, when attaching the propeller nut 4 to the propeller shaft 1 (see Fig. 1) using the device of the second embodiment, the axis between the propeller nut 4 and the propeller shaft 1 is fixed by following the same procedure as in the first embodiment. After aligning the propeller nuts 4 and the propeller shaft 1, and covering the threaded part of the propeller shaft 1 with the bellows-type cover 17 for preventing dust from falling, the drive air motor 19 is activated to remove the gears 24 and 1. The inner casing 12 is rotated via the gear 25.

As a result, the propeller nut 4 rotates together with the inner casing 12 and is tightened onto the propeller shaft 1.

Note that the drive air motor 19 is equipped with a clutch (not shown) that automatically disengages when excessive torque is applied, and the propeller nut 4 is closed with proper torque.
can be tightened. Further, instead of the clutch, a torque meter may be installed to tighten the propeller nut 4 to a specified torque.

As detailed above, the propeller nut mounting device of the present invention has the following effects and advantages.

(1) Since the propeller nut is held within the outer casing via rollers, stability is ensured during transportation and installation work of the propeller nut, greatly improving work safety.

(2) The load of the propeller nut itself is not applied to the propeller shaft, and the torque for rotating the propeller nut is transmitted through the inner casing, which has a larger outer diameter than the propeller nut. This eliminates the need for force and saves labor, while also making it possible to tighten the propeller nut using an air motor.

(3) In the outer casing support adjustment mechanism, the lower end of the lifting and inclination adjustment piece, which is pivotally supported by the fixed piece at the upper part of the outer casing, is driven by an adjustment member, so that the inclination of the propeller nut axis can be easily finely adjusted. This makes it easy to align the axes of the propeller shaft and propeller nut.

(4) The device no longer comes into direct contact with the female screw part of the propeller nut, and the dust fall prevention cover attached to the outer casing prevents dust from falling and adhering to the male screw part at the rear end of the propeller shaft. Therefore, it is possible to prevent the screw from seizing due to dirt adhering to the screw portion.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional propeller nut mounting means; Figure 1 is a side view thereof, Figure 2 is a perspective view thereof, and Figures 3 to 6 are views of a conventional propeller nut mounting means. This shows the propeller nut mounting device.
FIG. 3 is a front view thereof, FIG. 4 is a sectional view taken along the − arrow in FIG. 3, and FIG. 5 is a sectional view taken along the − arrow in FIG.
6a to 6c are sectional views for explaining the operation thereof, and FIG. 7 is a perspective view showing a propeller nut mounting device as a second embodiment of the present invention. 1...Propeller shaft, 4...Propeller nut, 4
a... End face, 11... Outer casing, 12... Inner casing, 13... Lifting inclination adjustment piece, 1
3a... Biting hardware, 13b... Hole opening, 14...
... Fixed piece, 14a ... Pin, 15 ... Sliding piece, 15a ... Recess, 16a, 16b ... Adjustment bolt, 17 ... Bellows type cover for preventing dust from falling, 18
...Mounting piece, 19...Drive air motor, 2
0...Roller, 21...Rail, 22, 22a...
...Flange, 23...Nut fixing bolt, 23a
...Adapter, 24, 25...Gear.

Claims (1)

[Scope of utility model registration request] It consists of a ring-shaped inner casing with a propeller nut holding part on the inner periphery, and an outer casing that rotatably supports the inner casing. A fixed piece attached to the top,
A lifting/tilting adjusting piece is pivotally supported by the fixed piece and can rotate around a horizontal axis perpendicular to the rotational axis of the inner casing, and the lower end of the lifting/tilting adjusting piece is driven relative to the fixed piece. The outer casing is provided with an outer casing support adjustment mechanism consisting of an adjustment member that is rotated in a specific manner, and the outer casing is provided with a dust fall prevention cover that can cover the male threaded portion of the rear end of the propeller shaft. ,
Propeller nut attachment device.