JP3291483B2 - Universal joints for ship propeller shafts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint for a propeller shaft of a marine vessel, and more particularly to a universal joint for a propeller shaft of a marine vessel capable of easily removing a propeller shaft.

[0002]

2. Description of the Related Art A propeller shaft is coupled to a power shaft by a coupling to transmit the torque of the power shaft. Also,
A portion of the propeller shaft closer to the propeller exposed to seawater and a portion closer to the power shaft than the portion are connected by a universal joint for propeller shafts. The part near the propeller is
Since it is damaged by drifting objects such as driftwood, there are many opportunities to remove the portion close to the propeller from the universal joint for a propeller shaft for repair or replacement. Further, a portion ahead of the universal joint for a propeller shaft is inserted into and held by a supporting member (bearing) of a propeller shaft hanging tool. This bearing material (bearing)
Is worn due to contact with the rotating propeller shaft and must be replaced periodically. At the time of this replacement, in addition to removing the universal joint for the propeller shaft, it is necessary for the propeller shaft to pass through the inside of the supporting member (bearing). Therefore, the universal joint for propeller shafts is required to have not only sufficient performance as a universal joint but also performance such as easy removal.
The performance as a universal joint includes sufficient strength and smooth rotation around both one pin of the cross pin and the other pin orthogonal thereto.

The universal joint for a propeller shaft includes (a) a cross pin, and (b) a portion (two-forked portion) having two fitting portions into which both ends of one of the cross pins are rotatably fitted. c)
It is composed of a portion having two fitting portions (bifurcated portions) into which both end portions of the other pin are rotatably fitted. conventionally,
Both of the bifurcations were integrally formed. But,
In the case of a one-piece object, the fitting portion is fitted with the cross pin by swaging, so that a large force is required for attaching and detaching the cross pin.

[0004] In order to improve this, both the fork shafts are vertically divided into two fork shaft insertion portions, and the two fork shafts are fastened to each other from the side of the shaft with the fastening means therebetween. Has been proposed (registered publication No. 7616444). As this fastening means, a bolt inserted into a hole of one engaging portion and a hole of the other engaging portion opposed to the shaft portion with the shaft portion interposed therebetween and a nut screwed thereto are used. The number of these bolts and nuts is required to be at least four per fastening part. By adopting this structure, it is only necessary to unscrew the bolt and the nut for attaching and detaching the cross pin, so that a large force is not required.

[0005]

However, as described above, the frequency of removing the universal joint for a propeller shaft is not small. Each time the bolts are removed, the work of removing and further fastening the four bolts requires relatively many man-hours. Furthermore, a bigger problem is that the split fork is fastened with a bolt and a nut sandwiching the shaft, and a cross pin is fitted into each fitting portion while adjusting the parallel with the fastening at the same place. Work needs to be done. Since this operation requires skill and labor, the development of an improved structure has been desired by consumers.

An object of the present invention is to provide a universal joint for a propeller shaft of a ship, which can be easily removed and attached.

[0007]

According to a first aspect of the present invention, there is provided a universal joint for a propeller shaft of a ship, comprising: a cross pin in which an axis of a first pin and an axis of a second pin are orthogonal to each other on the same plane; a first bifurcated portion of <br/> Ru integrated to have a pair of fitting placed portion fitted into both ends of the pins rotatably, a pair of fitting Add fitted rotatably to both ends of the second pin and a second bifurcated portion of the split to have a been portion. The cross pin is aligned with the axis of the first pin.
Penetrating member having a through hole and a through hole of the penetrating member.
Penetrating along the axis of the penetrating pin to be inserted and the second pin
Two protruding pins protruding in opposite directions from the member
Wherein the first fork has an integral structure and has a through hole
A through pin passing through the second fork
Is a first fitting portion into which one of the two protruding pins is fitted.
And the other of the two protruding pins
And a second divided portion having a second fitting portion to be inserted.
And the first divided part and the second divided part are fastened to each other.
Including fastening means.

[0008] In a small boat, due to the above structure,
By releasing the fixing of the through pin fixed to the fitting portion of the bifurcated portion and removing the through pin from the through hole, the universal joint for a propeller shaft can be very easily removed. At this time, if the arrangement in which the second fork is attached to the propeller shaft of the propeller shaft is adopted, the state where the remaining cross pin removed is fitted in the second fork is maintained. Is done. Also, because of the simple structure,
It is easy to improve the strength of the penetration pin and penetration part,
The strength of the universal joint for a propeller shaft can be greatly improved. As a result, the durability can be improved by a simple structure without burning or the like. For this reason, the conventional joints for propeller shafts made of cast aluminum bronze have been used with an emphasis on workability of complex shapes and prevention of seizure, etc. It has become possible to ensure improved durability. The through pin according to the first aspect of the present invention may be configured such that (a) the through pin of the cross pin is rotatably inserted into the through hole and is fixed to the fitting portion of the first fork.
(b) As for rotation, it may be integrated with the cross pin and rotatably fitted into the fitting portion of the first fork.

The universal joint for a propeller shaft of a ship according to the second aspect of the present invention is the universal joint for a propeller shaft of a ship,
The through pin is rotatably inserted into the through hole, and is fixed to the fitting portion of the first fork.

When the through pin fixed to the fitting portion of the fork is released, the through pin can be easily pulled out of the through hole, and as a result, the universal joint can be separated. The penetrating pin according to the second aspect is the first aspect.
This corresponds to the through pin having the configuration (a) in the description of the present invention.

[0011] Vessel for a universal joint propeller shaft of the invention of claim 3, Te universal joint smell propeller shaft of the of the ship,
Bifurcated portion of the integrated includes a shaft housing part for housing the end portion of the shaft fork portion of said one-piece is attached, detachment preventing means for preventing the elimination of the end portions of the shaft housing portion and the shaft And

According to the above configuration, when one of the propeller shafts is inserted into or removed from the supporting member (bearing), a split-type fork is attached to the propeller shaft. In this case, if the fastening means is loosened and removed, the split forked portion can be removed from the end of the shaft. as a result,
The propeller shaft having no forked portion at the end can be easily inserted into or removed from the supporting member (bearing).

According to a fourth aspect of the present invention, there is provided a universal joint for a propeller shaft of a ship, wherein the first fork is an integral fork, and Is a split type fork. Also, the first
Is attached to the propeller shaft on the power shaft side, and the second fork is attached to the propeller shaft on the propeller side.

With the above arrangement, the bifurcated portion having the fitting portions for fitting both ends of the through pin is an integral type forked portion, and the bifurcated portion having the fitting portions for fitting both ends of the protruding pin is a split type. It becomes the fitting part of the. Therefore, the work of attaching the divided fork to the end of the shaft and the work of fitting the cross pin into the fitting portion of the fork can be performed independently. As a result, since there is no need to perform the two operations while adjusting each other, the operation is simplified and the operation efficiency is greatly improved. Further, the propeller shaft on the propeller side is inserted into the bearing material (bearing) of the propeller shaft hanging tool, and when replacing the worn bearing material (bearing), the propeller shaft is removed from the bearing material (bearing). Need to be removed. By arranging the split-type forked portion to be fastened to the propeller shaft on the propeller side, the fastening means can be removed and the propeller shaft can be easily removed through the supporting material (bearing). For this fastening, for example, bolts and nuts are used,
The bolts and nuts can be removed without requiring labor and skill, and the replacement of the bearing material (bearing) can be easily performed.

According to a fifth aspect of the present invention, there is provided a universal joint for a propeller shaft of a marine vessel, wherein the universal joint for a propeller shaft has an integral fork and a split fork. The axis line is continuous both over the storage portion and the end of the shaft, and continuously over both the portion fastened across the shaft end of the split fork and the shaft end. A knock pin groove is provided in a direction intersecting the groove, and the knock pin is inserted into the knock pin groove, thereby preventing any of the two forked portions from being displaced in the axial direction with respect to the shaft.

With the above-mentioned knock pin, the displacement between the shaft and the fork in the axial direction can be prevented, and the detachment between the two can be easily prevented. The knock pin mainly prevents the displacement in the axial direction, but naturally also prevents the rotational displacement between the two. The construction of this installation is very simple,
Manufacturing costs can be reduced.

According to a sixth aspect of the present invention, there is provided a universal joint for a propeller shaft of a ship, wherein the universal joint for a propeller shaft has an integral fork and a split fork. The axis line is continuous both over the storage portion and the end of the shaft, and continuously over both the portion fastened across the shaft end of the split fork and the shaft end. A key groove is provided in parallel with the shaft, and a key is inserted into the key groove, so that both of the two forked portions are prevented from rotating with respect to the shaft.

With the above-mentioned key, rotational displacement between the fork and the shaft end can be easily prevented, and the attachment of the fork to the propeller shaft is completed. Further, since the mechanism is simple, it is possible to reduce the manufacturing cost.

[0019]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing a universal joint for a propeller shaft of a ship according to an embodiment of the present invention. In FIG. 1, the universal joint 1 for a propeller shaft is mainly composed of an integral fork 10, a split fork 20, and a cross pin 30.
It is composed of The integrated fork 10 includes two fitting portions 13 and 14 that are divided into two forks, a portion having the shaft housing 11, and a dowel pin groove 12 for inserting a dowel pin. The two fitting portions 13 and 14 are provided with holes into which the through pins 31 which are one pin of the cross pin 30 are fitted. This through pin 31 is a nut 3
2 secures the fitting portions 13 and 14. The through pin in the present embodiment is (a) rotatably inserted into the through hole of the cross pin and fixed to the fitting portion of the first fork. However, (b) the rotation may be integrated with the cross pin and rotatably fitted into the fitting portion of the first fork. The structure of (b) can perform a function almost the same as the structure of (a).

On the other hand, the split-type fork has two fitting portions, which are also formed in two forks, and a shaft receiving portion 21.
And a knock pin groove 22 into which the knock pin is inserted. The split fork is divided by a longitudinal section including an axis, and the two fitted portions are fastened by bolts 23 and nuts, and attached to the end of the shaft. Each of the two fitting portions is provided with a fitting hole 25. Projection pin 34 of cross pin 30
Is inserted into the insertion hole 25, and the detachment prevention disk 38 having a diameter larger than the diameter of the protruding pin is attached to the bolt 3.
8 and fixed to the protruding pin. Since the length of the protruding pin 34 is slightly longer than the height of the fitting portion, it is possible to fix the detachment prevention disk to the protruding pin 34 as described above.

2 to 5 are views showing a cross pin of the universal joint for a propeller shaft according to the present invention. FIG. 2 is a plan view of the cross pin in a state where the through pin 31 shown in FIG. 4 is removed. The fitting with the integral fork is performed as follows. Referring to FIGS. 2 and 3, a through-hole 36 having a through-hole 33 of cross pin 30 is vertically sandwiched between two fitting portions of the integral fork. You. The through pin 31 shown in FIG. 4 passes through the fitting hole (not shown in FIG. 1) of the integral fork and the through hole 33 of the penetrating portion 36 of the cross pin, and the top of the bolt portion, the nut 32 and Is fixed to the integral forked part by the stress generated between them. The protruding pin 34 in FIG. 3 corresponds to a second pin, and both ends of the protruding pin are fitted into fitting holes of two fitting portions of the split fork. Protruding pin 34
A bolt (not shown) is screwed into a female screw 35 provided along the axis of the bolt to project a detachment prevention disk (not shown) and fix it to the pin 34. Even without the detachment prevention disk, the protrusion prevention pin does not detach from the fitting portion, so that the detachment prevention disk is not necessarily required.

FIGS. 6 to 8 are views showing an integral fork. FIG. 6 is a front view, FIG. 7 is a plan view, and FIG.
FIG. 8 is a side view of the shaft storage unit viewed from the left side, in which the fitting portion of FIG. 7 is omitted. This integral fork is attached to the propeller shaft closer to the power shaft. In the integral fork, a fitting hole 15 is formed in each of the two fitting portions 13 and 14, and the fitting hole 15 fits a through pin 31 of a cross pin. The integral fork has a shaft housing 11 in which the end of the propeller shaft close to the power shaft is housed. A continuous knock pin groove 12 is provided between the shaft housing portion and the end of the propeller shaft. By inserting a knock pin into this groove, the integral fork is attached to the propeller shaft close to the power shaft. . Further, a key groove 16 is provided substantially in parallel with the axis of the propeller shaft on the inner periphery of the shaft storage portion.
A keyway (not shown) which is also substantially parallel to the axis is provided on the propeller shaft side. By inserting the key into the key groove 16, the integral fork is more firmly attached to the propeller shaft close to the power shaft.

FIG. 9 to FIG. 11 are views showing a split type fork 20 which is vertically split into two parts. Two fitting portions 23, 2
The one pin 34 of the cross pin is inserted and fitted into the fitting hole 25 formed in each of the four. A bolt hole 26 is formed in a portion having the shaft housing 21 for housing the end of the propeller shaft on the propeller side. The split-type bifurcated portion has two fitting portions opposed to each other sandwiching the end of the propeller shaft, and is fastened to the propeller shaft by bolts and nuts.
Attached to the propeller shaft. At this time, as in the case of the integral fork, a knock pin groove 22 and a key groove 29 are further provided, and a knock pin and a key are inserted into each of the knock pin groove 22 and the key groove 29, whereby the propeller shaft is more firmly attached.

Next, the function of the universal joint for a propeller shaft will be described with reference to FIG. Integrated fork 10
Is mounted on the propeller shaft on the power shaft side, while the split fork 20 is mounted on the propeller shaft on the propeller side. Use a cross pin 3 to separate the propeller shafts of both parts.
It is only necessary to loosen the screwing between the bolt 31 and the nut 32, which are 0 through pins, and remove this single bolt 31. The split fork 20 with the remaining cross pin attached and the integral fork 10 can be separated very easily.

Further, when the propeller shaft on the propeller side is pulled out from the supporting member (bearing) of the propeller shaft suspender, 4
The bolt 23 may be removed together with the knock pin and the key. These detaching operations are similar to daily operations and can be performed very easily.

In addition to the simplicity of the work and the improvement of the work efficiency, the universal joint for a propeller shaft of a ship according to the present invention has a simple structure. Therefore, it is easy to increase the thickness of the penetrating portion 36 and the penetrating pin 31, and it is possible to greatly improve the durability. In addition, due to its simple structure, it is possible to adopt a manufacturing method such as cutting stainless steel from manufacturing with conventional castings,
This is also effective in improving durability and reducing manufacturing costs.

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 not limited to these embodiments. Not limited. 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.

[0029]

By using the universal joint for a propeller shaft of a marine vessel of the present invention as a universal joint attached to two parts of a propeller shaft, the joint for separating the two propeller shafts can be easily removed and attached. Will be able to do it. Further, it is possible to easily insert the propeller shaft on the propeller side into the supporting surface material (bearing) of the propeller shaft hanging tool. In addition, the universal joint for propeller shafts of a ship according to the present invention has a simple structure, so that durability can be easily improved. Further, since the structure is simple, it is possible to manufacture stainless steel by processing, and it is possible to greatly reduce the manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a view showing a universal joint for a propeller shaft according to an embodiment of the present invention.

FIG. 2 is a plan view of a cross pin of the universal joint for a propeller shaft of FIG. 1;

FIG. 3 is a front view of a cross pin of the universal joint for a propeller shaft of FIG. 1;

4 is a front view of a bolt that is a penetrating pin of the cross pin in FIG. 3;

FIG. 5 is a front view of a nut for fixing the bolt of FIG. 4 to the fork.

FIG. 6 is a front view of an integral forked portion of the universal joint for a propeller shaft of FIG. 1;

FIG. 7 is a plan view of the integral forked portion of FIG. 6;

8 is a left side view of a portion of FIG. 7 excluding a fitting portion of the integral fork.

FIG. 9 is a front view of a split-type forked portion of the universal joint for a propeller shaft of FIG. 1;

FIG. 10 is a plan view of the split-type forked portion of FIG. 9;

FIG. 11 is a left side view of a portion of FIG. 9 excluding a fitting portion of the forked portion of the split type.

[Explanation of symbols]

1 Universal joint for propeller shaft, 10 Integrated fork, 1
1. Integrated shaft storage part of two-forked part (power shaft side propeller shaft storage part), 12, 22 knock pin groove, 13, 14, 2
3, 24 fitting portion, 15, 25 fitting hole, 20 split type fork, 21 split type fork shaft housing (propeller side propeller shaft housing), 26 bolt hole, 28 nut, 30 Cross pin, 31 through pin, 32 nut, 33 through hole, 34 cross pin protruding pin, 35
Female screw of protruding pin, 36 penetration, 37 bolt,
38 Detachment prevention disc.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16D 3/40 F16D 3/26

Claims (6)

(57) [Claims] 1. A cross pin in which an axis of a first pin and an axis of a second pin are orthogonal to each other on the same plane, and both the first pin and the cross pin.
The have a pair of fitting placed portion rotatably fitted into the rotation end 1
A bifurcated portion of a universal joint and a second bifurcated portion you have a pair of fitting placed portion fitted into freely rotate both ends of the second pin, the cross pin, wherein Through holes along the axis of the first pin
Having a penetrating member and being inserted into a through hole of the penetrating member
A penetrating pin, and the penetrating portion along an axis of the second pin.
Two projecting pins projecting in opposite directions from the material
Wherein the first bifurcated portion is a unitary construction, the through hole
Wherein are those fitted into the through-pin, said second bifurcated portion, fitting one of the two ejector pins through
A first divided portion having a first fitting portion to be fitted therein;
Has a second fitting portion for fitting the other one of the protrusion pins
And a second dividing part, wherein the first part is divided into two parts.
A universal joint for a propeller shaft of a ship, including a fastening means for fastening a split portion and a second split portion . 2. The universal joint for a propeller shaft of a ship according to claim 1, wherein the through pin is rotatably inserted into the through hole and is fixed to a fitting portion of the first fork. . Bifurcated portions of 3. Before SL integral type, shaft housing part for housing the end portion of the shaft fork portion of said one-piece is attached and the end portion of the shaft housed in the shaft housing part 2. The universal joint for a propeller shaft of a ship according to claim 1, further comprising: detachment preventing means for preventing detachment of the shaft housing from the shaft storage portion. 3. 4. The fork according to claim 1, wherein the first fork is an integral fork, the second fork is a split fork, and the first fork is a power shaft. The universal joint for a propeller shaft of a ship according to any one of claims 1 to 3, wherein the universal joint is attached to a propeller shaft on a propeller side, and the second fork is attached to a propeller shaft on a propeller side. 5. A continuous connection between both the shaft storage portion of the integral fork and the end of the shaft, and fastening between the shaft end of the split fork and the shaft. A knock pin groove is provided in a direction that intersects with the axis together with both the portion and the end of the shaft, and by inserting a knock pin into the knock pin groove, both of the two forked portions are formed. The universal joint for a propeller shaft of a ship according to any one of claims 2 to 4, wherein the shaft is prevented from shifting in the axial direction with respect to the shaft. 6. The shaft is fastened continuously over both the shaft housing portion of the integral fork and the end of the shaft and across the shaft end of the split fork. A key groove is provided continuously over both the end portion of the shaft and the end of the shaft and both are parallel to the axis. By inserting a key into the key groove, both of the two forked portions are connected to the shaft. The rotational displacement is prevented with respect to.
A universal joint for a propeller shaft of a ship according to any one of the above.