JPS5824623A - Elastic coupling device for marine engine - Google Patents

Abstract

PURPOSE:To lengthen the life span of a coupling device, in which couplings of respective end portions of a driving shaft and a driven shaft are connected to each other through elastic means and an air clutch, by providing a hollow outer race brought into slidable contact with the air clutch of the elastic means so as to diffuse generated heat. CONSTITUTION:A coupling device for connecting between a driving shaft E coupled to a Diesel engine and a driven shaft P coupled to auxiliary machinery comprises the first and second couplings 1, 2 connected to each shaft E, P, and buffer elastic means 3 and air clutch means 4 which are connected to each coupling 1, 2. The outer race 8 of the elastic means 3 comprises a fitting plate 8a for an elastic ring 7 and a plate 8b brought into contact with the inside clutch shoe 9 of the clutch means 4, a heat-insulating space 8c being formed between both the plates 8a and 8b. The heat-insulating space 8c communicates with the air through a vent 8d, so that heat generated when the shoe 9 is brought into close contact with the plate 8b is diffused in the atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention couples a front-end drive shaft of a marine power engine that is particularly subject to torsional vibration and a rear-end driven shaft of an auxiliary equipment so as to suppress transmission of vibratory angular displacement, and The present invention relates to a donut-shaped elastic coupling device that is integrated with an air clutch engagement/disassembly device and has a short axial length dimension, thereby shortening the length of the engine room of a ship.

Traditionally, like diesel engines mounted on ships,
In systems where auxiliary equipment such as pumps and compressors are driven by the power of the power engine, the front end drive shaft of the power engine and the rear end driven shaft of the auxiliary equipment are directly coupled with an air clutch, as shown in Japanese Patent Publication No. 17445/1983, for example. Alternatively, as shown in Japanese Utility Model Publication No. 46-21855, an elastic coupling member is provided on the rear end driven shaft of the auxiliary machine, and the elastic coupling member is coupled to the front end drive shaft of the prime mover by a clutch. but,
With the former, there is a problem that the rubber tube used as an air clutch is an elastic body and cannot be expected to have an anti-vibration effect against torsional vibrations, so it can only transmit the rotational speed at a certain limited number of rotations of the driving engine. In the latter case, the vibration of the drive coupling when the clutch is idling is not buffered, and the elastic coupling material is placed away from the clutch in its radial or axial direction in order to dissipate the heat generated when the clutch is engaged. Therefore, there was a problem that the overall structure became complicated and large, and the installation area became large. In addition, when a clutch is provided to the front end drive station of a power engine via an elastic coupling member, its inertia rate increases, and if the resonance point of the elastic coupling member enters the rotation during use, the elastic coupling member may be damaged. In practice, it was not used at all due to the danger of this.

In order to eliminate the drawbacks of the conventional example described above, the present invention uses flat inner and outer rings on the front end drive shaft of the power engine as an elastic coupling device for connecting a power engine and auxiliary equipment suitable for this type of marine engine. An air clutch means is provided via an elastic joint member with a low inertia coefficient, and the air clutch means is provided coaxially with and laminated on the outside of the elastic joint member, and the heat generated when the air clutch is engaged is reduced. By newly creating a relief hole provided in the outer ring of the above-mentioned elastic joint material, the vibration of the power engine when the air clutch is idling can be buffered by the elastic joint material, and the elastic joint material has a small inertia coefficient. Therefore, it can be used to transmit large rotations of a power engine, that is, large capacity torque, while avoiding complicated torsional vibrations.Furthermore, the elastic joint material is long so that the heat generated by the air clutch is dissipated from the relief hole in the outer ring. Moreover, since the air clutch and small elastic joint members are arranged coaxially and stacked on top of each other, the overall structure of the device is simple and easy to assemble and disassemble, and its radial and axial dimensions are small. Therefore, it is an object of the present invention to provide a coupling device that can reduce the installation area and suppress the transmission of vibrational angular displacement.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

In Figure 1, E is a diesel engine located on one side (
P is the driven shaft on the rear end side of the pump (not shown) located on the other side, 1 is the first joint connected to the drive shaft E, 2 is the driven shaft The second joint %3 connected to P is a shock absorbing elastic means connected to the first joint 1, and 4 is an air clutch means connected to the second joint 2, all of which are arranged concentrically on the same axis. At the same time, the elastic means 3 and the air clutch means 4 are stacked on top of each other and arranged in the same phase.

In the first joint 1, the front end of the drive shaft E is fitted into a through hole 1a provided in the shaft core and connected integrally with a key, while the inner ring 5 of the elastic means 3 is inserted into the 7 flange 1b provided in the front part. It is integrally connected to the rear end protrusion 5a formed thickly. Second
In the joint 2, the rear end of the driven shaft P is fitted into a through hole 2a provided in the shaft center and connected integrally with a key, while the outer side of the air clutch means 4 is connected to a 7 flange 2b provided at the rear via an arm. It is integrally connected to the front end mounting portion 6a formed by bending the holder 6 with a bolt.

The elastic means 3 consists of a thin cylindrical inner ring 5 made of metal, a thick cylindrical elastic ring 7 made of rubber, and a thin cylindrical outer ring 8 made of metal. The rings 7 are stacked, and the outer ring 8 is stacked on the outer surface of the elastic ring 7, and these are integrally connected to each other by connecting means to form a generally small cylindrical body having a small overall coefficient of inertia. Therefore, the inner ring 5, elastic ring 7, and outer ring 8 constitute a triple ring stacked on the same axis. The elastic ring 7 interposed between the inner ring 5 and the outer ring 8 is an annular ring made of natural rubber or a similar rubber, such as synthetic rubber, or a composite rubber made by combining natural rubber and synthetic rubber. The inner and outer peripheral surfaces are vulcanized and bonded to the inner ring 5 and outer ring 8, respectively.
Pre-compress and insert. In addition, instead of being circular, the elastic ring 7 may be formed by dividing rubber pieces on the circumference and combining them continuously like a circular ring or discontinuously at intervals. . The inner ring 5 is made of one piece, and the outer ring 8 is made of a mounting plate 8a for the elastic ring 7 and a contact plate 8b for the inner clutch shoe 9 of the air clutch means 4, as shown in FIG. The abutment plate 8b is integrally connected to the elastic ring 7, and is also integrally fixed to the mounting plate 8a with bolts, so that the abutment plate 8b has a thin cylindrical shape as a whole and has an extremely small inertia factor. Between the mounting plate 8a and the contact plate 8b, a space 8C with a certain gap is provided in the center thereof, and at least one or more air circulation ports 8d leading from the space 8C to the outside are provided so that heat can be dissipated. The heat generated during power transmission, that is, when the clutch shoe 9 and the contact plate 8b are in close contact with each other, is transmitted from the contact plate 8b to the air layer in the space 8C, and then to the outside atmosphere through the communication port 8d. As a result, the heat of the abutment plate 8b is prevented from being transmitted to the elastic ring 7 through the mounting plate 8a. In addition, the above space 8C
As an alternative to this, the inner ring 5 is inserted from the outer ring 8 through the elastic ring 7
A relief hole mechanism may be provided to allow air to escape.

As described above, the elastic means 3 formed by laminating the inner ring 5, the elastic ring 7, and the outer ring 8 in sequence acts as a joint with flexibility i, so that the vibration caused when the drive shaft rotates is extremely reduced. The inertia factor is made small, and the inner ring 5
The bearing that directly receives the load can be omitted. This is because the outer ring 8 is precision machined and has a small mass, but even if a bearing is provided on the inner ring 5, it does not interfere with its operation.

The air clutch means 4 is connected to an annular outer holder 6, an annular air tube 10 into which air can be freely injected, an annular inner clutch shoe 9, and an air tube 10, and supplies pressurized air into the tube 10. Air tubes 10 are stacked inside a large-diameter outer holder 6 consisting of a supply pipe 11, and clutch shoes 9 are stacked on the inner and outer surfaces of the tubes 10, and these are integrally connected to each other by adhesive means, The whole is formed into a generally large cylindrical body constituting a so-called triple ring, and when pressurized air is supplied from the pipe 11 into the air tube 10, the air tube 10 expands and its thickness increases rapidly, causing the clutch shoe 9 to Elastic means: 3 will be pushed towards the outer ring 8. The air clutch means formed by stacking the clutch shoe 9, the air tube 10, and the outer holder 6 in this order is arranged on the same axis and in the same phase on the outer side of the elastic means 3 as the movable side of the air clutch. ” - The inner surface of the clutch shoe 9 is constant l1i with the outer surface of the outer ring 8.
They are arranged to face each other with a gap 12 of about 2.5 mm, for example, and when the air tube 10 expands as described above and pushes the clutch shoe 9 toward the outer ring 8, the two come into close contact. They become integrally coupled. That is, when pressurized air is supplied to the air tube 10, the tube 10 bulges inward in the direction perpendicular to the axis, closes the gap and closes the clutch shoe 9.
is in close contact with the outer ring 8. As a result, the power transmitted from the drive shaft E through the first joint 1 to the elastic means 3 is transmitted to the air clutch means 4 through the coupling between the outer ring 8 and the clutch shoe 9.
and is transmitted from the air clutch means 4 to the driven shaft P via the second joint 2. In addition, when such power transmission is not necessary, air is removed from the tube, the air tube 10 contracts and a gap is created again, and the outer ring 8 and clutch shoe 9 separate from each other and no power is transmitted. .

In addition, as mentioned above, the heat generated between the clutch shoe 9 and the contact plate 8b in terms of power transmission is transferred from the space 8C to the communication port 8d.
It is dissipated to the outside through the process.

As detailed in the above embodiments, the elastic coupling device for a marine engine according to the present invention has a first joint connected to the front end of the drive shaft of the prime mover, and a second joint connected to the rear end of the driven shaft of the auxiliary machine. A shock absorber in which a thin cylindrical inner ring, a thick cylindrical elastic ring, and a thin cylindrical outer ring are successively stacked on a concentric axis on the first joint to form an approximately small cylindrical body with a low coefficient of inertia. while connecting the inner ring of the elastic means to the second joint;
The above air clutch means is formed by stacking an annular outer holder, an annular air tube into which air can be freely injected, and an annular inner clutch shoe on a concentric shaft to form a roughly large cylindrical body. a holder is connected, and the clutch means is arranged outside the elastic means on a concentric axis and in phase so that the outer ring faces the clutch shoe at a constant distance from each other. When the air tube is expanded and filled with air, the clutch shoes are brought into close contact with the outer ring, and the two are integrally coupled. Formed into a structure that allows for heat dissipation by providing a flow port,
The heat dissipation structure of the outer ring dissipates the heat generated when the clutch shoe and the outer ring are brought into close contact with each other to the outside, and the elastic means is connected to the drive shaft via the first joint. Because of the connection, the elastic contact means can buffer the vibrations of the power engine when the air clutch is idling, and the elastic means has a small inertia ratio, so even if complex torsional vibrations are applied to the elastic ring, the elastic ring can be Therefore, large-capacity rotational torque of the driving engine can be transmitted to the driven shaft via the air clutch means through the elastic means, and the elastic means can be formed into a generally small cylindrical body. The structure of the elastic coupling device as a whole is improved because the air clutch means is formed into a double annular cylinder, and an air clutch means formed into a roughly large cylinder is arranged on the outer side of the air clutch means in the same phase on a coaxial axis. is simple and can be constructed with small radial or axial dimensions.

Therefore, the elastic coupling device according to the present invention can suppress torsional vibrations beyond the conventional technology, such as by being able to obtain a large transmission torque and selecting a low torsional spring constant. Since it can be made considerably shorter, the length of the engine room for marine use is significantly shortened, and for land use, the length of the engine axial direction of the private generator room or pump room, etc., is significantly shortened.

Furthermore, since the outer ring has a structure that allows heat to be dissipated, the heat generated by the air clutch is dissipated to the outside through the air flow opening of the outer ring and is not transmitted to the elastic ring, which prevents the rubber from breaking due to heating as in the conventional case. It has a long lifespan and can be used stably without any problems.

It is easy to assemble and disassemble because the elastic ring of the elastic means is endless, and even if it is split, it can be easily repaired as a single piece of rubber. Since the constant is low, the thrust load can be reduced, and the torsion spring constant can be easily adjusted by changing the thickness of the elastic ring. Furthermore, the coupling device according to the present invention has a simple structure, low cost, and is easy to install, and can be particularly suitably used as a coupling device for a drive shaft and a driven shaft in a multi-cylinder, high-speed engine.

[Brief explanation of the drawing]

FIG. 1 is a side view of an elastic coupling device according to the present invention in a half-mounted cross-section, FIG. 2 is a half-mounted front view of FIG. 1, and FIG. 3 is an enlarged sectional view of the main part of FIG. 1. E... Drive shaft, P... Driven shaft, 1... First joint,
)...Second joint, 3...Elastic means, 4...Air clutch stage. Patent applicant: Daihatsu Diesel Co., Ltd. (Hagayo agent/patent attorney, 2 people) Figure 2 Figure 3 Procedural amendment, @e. 1. Indication of the case 1988 Patent application no. 114177 No. 2 Name of the invention Elastic coupling device for marine engines 3, Person making the amendment Relationship to the case Patent applicant Osaka Osaka Yodoku Saisai Yodnaka Address 1-1-87-4 Hitoyodonaka, Oyodo-ku, Osaka-shi, Osaka Prefecture; f
(: EIA 'wa' shout season 5
, date of amendment order (voluntary) 6. Amendment subject to amendment #IB 1, title of invention, elastic coupling device for marine engines 2, claims, thick-walled cylindrical elastic coupling device 7, and thin-walled cylindrical elastic coupling device. While connecting the inner ring 5 of the shock absorbing elastic means 3, which is formed by stacking the outer rings 8 sequentially on the outside on a concentric axis and forming a roughly small cylindrical body with a coefficient of inertia of .j\, to the second joint 2, An air clutch formed by stacking an annular outer holder 6, an annular air tube 10 into which air can be freely injected, and an annular inner clutch shoe 9 on a concentric shaft and forming a roughly large cylindrical body. 1. Connecting the holder 6 of the means 4 and arranging the clutch means 4 outside the elastic means 3 on the same axis and in phase. Then, when the outer ring 8 and the clutch shoe 9 are arranged so as to face each other at a certain distance, and the air tube 10 is expanded by filling air, the clutch shoe 9 is connected to the outer ring -■-■-■ ■■■−−■■
-■---1■-An elastic coupling device for a marine engine in which the two parts are integrally coupled in close contact with each other. 3. Detailed Description of the Invention The present invention relates to an elastic coupling device for a marine engine that elastically couples a front end drive shaft of a marine power engine and an auxiliary rear end driven shaft via an air clutch. An excellent device of this type has already been disclosed in Japanese Utility Model Application Publication No. 49-72839, filed by the same applicant as the present application. With this technology, the technology of Japanese Patent Publication No. 43-17445, in which the front end drive shaft of a power engine and the rear end driven shaft of an auxiliary equipment are directly coupled with an air clutch, or the technology of Utility Model Publication No. 46
The provision of an elastic coupling member on the rear end driven shaft of an auxiliary machine as shown in No. 21855 greatly improves the previous technique of coupling the elastic coupling member to the front end drive shaft of a power engine using a clutch. In other words, as an elastic coupling device for connecting auxiliary equipment,
An air clutch means is provided on the front end drive shaft of the power engine through an elastic joint member having a flat plate-shaped inner ring and an outer ring to reduce the inertia coefficient, and the air clutch means is laminated on the same axis of the elastic joint member and on the outside thereof. It can be used for large rotation of a power engine, that is, for transmitting a large capacity torque, unless it is provided in a state in which it is shared by an elastic joint material, and the elastic joint material has a small inertia ratio, thereby avoiding complicated torsional vibrations. Moreover, since the air clutch and the small elastic joint members are arranged coaxially and stacked on top of each other, the overall structure of the device is simple and easy to assemble and disassemble, and its radial or axial dimensions can be reduced. However, the installation area has become smaller and the transmission of vibrational angular displacement can now be suppressed. Due to its superior function and effect, this elastic coupling device has been widely used in the past. However, since the above-mentioned elastic joint materials are made of natural rubber, synthetic rubber, or composite rubber made by combining natural rubber and synthetic rubber, in addition to mechanical fatigue due to long-term use, they also suffer from fatigue due to frictional heat when the air clutch is engaged. The damage was doubled and caused damage to the rubber. In other words, a new problem regarding lifespan has been raised. Therefore, apart from the mechanical fatigue of the elastic joint material mentioned above. In particular, the challenge was how to deal with the heat generated when the air clutch is engaged, which accelerates the deterioration of rubber properties. Conventionally, as in Japanese Utility Model Publication No. 37-28818, attempts have been made to prevent overheating by forcefully circulating fresh air to remove the frictional heat in the transmission, thereby improving the durability of the friction belt and belt. Are known. However, in the technique disclosed in Japanese Utility Model Publication No. 37-28818 and other known techniques, since the space between the two transmission shafts is relatively large, the air circulation mechanism can be easily configured.
In most cases, axial flow forced cooling using blades or the like is used. Such cooling technology is described in the above-mentioned Utility Model Application Publication No. 49-72839.
It cannot be applied to the technology disclosed in the publication. This is because the main feature of the coupling device is that it has a double annular cylindrical body between the two shafts, making the overall structure of the coupling device simple and compact, and it is not possible to adopt a configuration that breaks this compact structure. be. Therefore, an object of the present invention is to effectively dissipate the heat generated when the clutch is engaged, without damaging this simple and compact coupling structure, based on the technology disclosed in Japanese Utility Model Application Publication No. 49-72839. The aim is to extend the lifespan. To achieve this objective, the gist of the invention is as follows. That is, a first joint is connected to the front end of the drive shaft of the power engine, a second joint is connected to the rear end of the driven shaft of the auxiliary machine, and a thin cylindrical inner ring and a thick cylindrical elastic ring are connected to the first joint. While connecting the inner ring of the shock absorbing elastic means formed by stacking a ring and a thin cylindrical outer ring sequentially on the outer side on a concentric axis to form a roughly small cylindrical body with a small inertia coefficient, the second joint is connected to a circular The above-mentioned holder of the air clutch means is formed by stacking an annular outer holder, an annular air tube through which air can be freely injected, and an annular inner clutch shoe sequentially on a concentric shaft and forming a roughly large cylindrical shape. connect, and
The clutch means is arranged outside the elastic means on a concentric axis and in the same phase so that the outer ring faces the clutch shoe at a constant distance and is filled with air. In an elastic force-sampling device for marine engines, in which the clutch shoe is brought into close contact with the outer ring when the tube is expanded, and force is extracted from both together, the outer ring is connected to the mounting plate of the elastic ring and the air clutch means. The mounting plate is integrally connected to the elastic ring, and the contact plate is integrally fixed to the mounting plate with bolts, and the overall shape is thin-walled and cylindrical, and its inertia rate is extremely high. In addition to being formed small, an insulating space with a certain gap is provided in the center between the mounting plate and the abutment plate, and at least one or more air circulation ports leading from the space to the outside are provided to allow heat to be dissipated. The heat generated when the clutch shoe and the abutment plate are in close contact with each other during power transmission is transmitted from the abutment plate to the air layer in the heat insulating space, and then dissipated to the outside atmosphere through the flow opening. This elastic coupling device for a marine engine is characterized in that the heat of the contact plate is thermally isolated so that it is not transmitted to the elastic ring through the mounting plate. Hereinafter, the present invention will be explained in detail together with the technology disclosed in Japanese Utility Model Application Publication No. 49-72839, which forms the background of the present invention. In Fig. 1, E is the diesel driven shaft located on one side, 1 is the y-th joint connected to the drive shaft E, 2 is the second joint connected to the driven shaft P, and 3 is connected to the first joint 1. The buffering elastic means 4 is an air clutch means connected to the second joint 2, and these are all arranged concentrically on the same axis, and the elastic means 3 and the air clutch means 4 are stacked on top of each other and are the same. arranged in phase. In the first joint 1, the front end of the drive shaft E is fitted into a through hole 1a provided in the shaft center and connected integrally with a key, while the inner ring 5 of the elastic means 3 is attached to a flange 1b provided in the front part. It is integrally connected to the thick rear end protrusion 5a with a bolt. In the second joint 2, the rear end of the driven shaft P is fitted into a through hole 2a provided in the shaft core and connected integrally with a key, while the air clutch means 4 is connected to a flange 2b provided at the rear via an arm. It is integrally connected to the front end attachment portion 6a formed by bending the outer holder 6 with a bolt. The elastic means 3 consists of an inner ring 5 made of metal and a thin cylindrical shape, a thick cylindrical elastic ring 7 made of rubber, and an outer ring 8 made of metal and a thin cylindrical shape. The rings 7 are stacked, and the outer ring 8 is stacked on the outer surface of the elastic ring 7, and these are integrally bonded to each other by adhesive means to form a generally small cylindrical body having a small overall coefficient of inertia. Therefore, the inner ring 5, the elastic ring 7, and the outer ring 8 constitute a triplet stacked on the same axis. Inner ring 5 and outer ring 8
The elastic ring 7 interposed between is an annular ring made of natural rubber or similar rubber, such as synthetic rubber, or a composite rubber formed by combining natural rubber and synthetic rubber, and has both inner and outer peripheral surfaces. are vulcanized and bonded to the inner ring 5 and outer ring 8, respectively, and pre-compressed and inserted. In addition, the elastic ring 7 is replaced with an annular shape,
It may be formed by dividing the rubber parts on the circumference continuously in an annular shape or by combining them discontinuously at intervals. The inner circle 5 is a piece of seiyori 9,
As shown in FIG. 3, the outer ring 8 has a mounting plate 8a for the elastic ring 7 and a contact plate 8b for the inner clutch shoe 9 of the air clutch means 4, and the mounting plate 8a is integrally connected to the elastic ring 7. At the same time, the contact plate 8b is integrally fixed to the mounting plate 8a with bolts, and is formed into a thin cylindrical shape as a whole and has an extremely small inertia factor. Heat can be dissipated between the mounting plate 8a and the contact plate 8b by providing a heat insulating space 8C with a certain gap in the center thereof and at least one or more air circulation ports 8d leading from the space 8C to the outside. When transmitting power, that is, the clutch shoe 9 and the contact plate 8b
The heat generated when the two are in close contact with each other is transmitted from the contact plate 8b to the air layer in the space 8C, and then dissipated to the outside atmosphere through the communication port 8d. As a result, the heat of the contact plate 8b passes through the mounting plate 8a to the 7. Cut off the heat so that it is not transmitted to 7. In addition, as a substitute for the above-mentioned space 8C, a relief hole mechanism may be provided so that air can pass through the elastic ring 7 from the outer ring 8 to the inner ring 5. As described above, the elastic means 3 formed by laminating the inner ring 5, the elastic ring 7, and the outer ring 8 in this order functions as a flexible joint so that the vibration caused when the drive shaft rotates is extremely reduced. The inertia factor can be made small, and the bearing that directly supports the inner ring 5 can be omitted. This is because the outer ring 8 is precision machined and has a small mass, but even if a bearing is provided on the inner ring 5, it does not interfere with its operation. The air clutch means 4 is connected to an annular outer boulder 6, an annular air tube 10 into which air can be freely injected, an annular inner clutch shoe 9, and an air tube 10 to supply pressurized air into the tube lo. Air tubes 1° are stacked inside a large-diameter outer holder 6, clutch shoes 9 are stacked on the inner and outer surfaces of the tubes 1o, and these are integrally connected to each other by adhesive means. The clutch shoe 9 is formed into a generally large cylindrical body that constitutes a triple ring as a whole, and when pressurized air is supplied from the pipe 11 into the air tube 1o, the air tube 1o expands and its thickness rapidly increases. is forced toward the outer ring 8 of the elastic means 3. In this way, the air clutch means formed by sequentially stacking the clutch shoe 9, the air tube 10° and the outer holder 6 is arranged on the same axis and in the same phase on the outer side of the elastic means 3 as the movable side of the air clutch. The inner surface of the clutch shoe 9 is arranged to face the outer surface of the outer ring 8 with a gap 12 of a certain distance, for example, about 2.5 fl, and the air tube 10 expands as described above. When pushed toward the outer ring 8, the two are brought into close contact and integrally coupled. That is, when pressurized air is supplied to the air tube 10, the tube 10 bulges inward in the direction perpendicular to the axis, the above-mentioned gap is closed, and the clutch shoe 9 comes into close contact with the outer ring 8. As a result, the power transmitted from the drive shaft E to the elastic means 3 via the first joint 1 is transmitted to the air clutch means 4 via the coupling between the outer ring 8 and the clutch shoe 9, and from the air clutch means 4 to the second elastic means 3. It is transmitted to the driven shaft P via the joint 2. Also, when there is no need for such power transmission, you can remove the air from the tube and use air tube 1.
0 contracts, a gap is created again, and the outer ring 8 and clutch shoe 9 are separated from each other, and power is no longer transmitted. In addition, as mentioned above, the heat generated between the clutch shoe 9 and the contact plate 8b during power transmission is transferred from the space 8C to the communication port 8d.
It is dissipated to the outside through the process. As described in detail in the above embodiments, the elastic coupling device for a marine engine according to the present invention has a first
At the same time, a second joint 2 is connected to the rear end of the driven shaft P of the auxiliary machine, and a thin cylindrical inner ring 5, a thick cylindrical elastic ring 7, and a thin cylindrical inner ring 5 are connected to the first joint 1. While connecting the inner ring 5 of the shock absorbing elastic means 3, which is formed by stacking the outer rings 8 sequentially on the outside on a concentric axis to form a roughly small cylindrical body having a small inertia coefficient, the second joint 2 is connected to an annular ring. An outer holder 6 and an annular air tube 10 into which air can be freely injected.
and the holder 6 of the air clutch means 4 formed by stacking annular inner clutch shoes 9 sequentially on the inner side on a concentric shaft to form a roughly large cylindrical body, and the clutch means 4 is connected to the elastic means 3. The outer ring 8 and the clutch shoe 9 are arranged in the same phase on the same axis on the outside of the clutch shoe 9, and the outer ring 8 is arranged to face each other at a constant distance, and the air tube 10 is expanded by being filled with air. Then, in the case where the clutch shoe 9 is brought into close contact with the outer ring 8 so that the two 1 are integrally coupled, the outer ring 8 is provided with an air circulation port 8d that communicates with the outside between its inner and outer surfaces. It is characterized in that it is formed in a structure capable of dissipating heat, and the heat generated due to the close contact between the clutch shoe 9 and the outer ring 8 is dissipated to the outside through the heat dissipation structure of the outer ring. Since the elastic means 3 is connected to the drive shaft E via the first joint 1, the elastic means can buffer vibrations of the power engine when the air clutch 4 is not activated, and the inertia rate of the elastic means 3 can be reduced. Because of its small size, the elastic ring 7 will not be damaged even if complex torsional vibrations are applied to the elastic means.
A large capacity rotational torque of the driving engine can be transmitted to the driven shaft via the air clutch means through the elastic means.Moreover, the elastic means 3 is formed into a generally small cylindrical shape, and the outer side thereof is formed into a substantially small cylindrical shape. Since the air clutch means 4 formed in the shape of a large cylinder are arranged on the same axis and in the same phase, and the entire structure is formed into a double annular cylinder, the structure of the elastic coupling device as a whole is simple, and its diameter The dimension in the direction or the axis direction is configured to be small. Since the outer outer ring 8 has a structure that allows heat to be dissipated, the heat generated by the air clutch 40 is radiated to the outside from the air flow opening 8d of the outer ring and is not transmitted to the elastic ring 7. This achieves the effect that it can be used stably at all times with a long life without any breakage. Further, the advantage of the coupling device according to the present invention is that it is easy to assemble and disassemble because bolts or the like are used for coupling, and furthermore, when the elastic ring of the elastic means is made endless, it has a very long life and can be divided into segments. However, single rubber is easy to repair,
In addition, since the spring constant in the axial direction is low, the thrust load can be reduced, and the torsional spring constant can be easily adjusted by changing the thickness of the elastic ring. Moreover, the structure is simple,
It is low cost and easy to install, especially for multi-cylinder,
Coupling 4 of driving shaft and driven shaft in high-speed engine, brief explanation of drawings FIG. 1 is a half-cut side view of an elastic coupling device according to the present invention, FIG. 2 is a half-cut front view of FIG. 1, and FIG. FIG. 3 is an enlarged sectional view of the main part of FIG. 1. E... Drive shaft, P... Driven shaft, 1... First joint,
2... Second joint, 3... Elastic means, 4... Air clutch means, 7... Rubber elastic ring, 8... Outer ring, 8C... Heat insulation space, 8d... Air circulation port, 9.
...Clutch shoe. Patent applicant Dyno 1 Tsu Diesel Co., Ltd.
1 other representative: Patent attorney Aoyama Hajime and 2 others

Claims (1)

[Claims] (1) A first joint is connected to the front end of the drive shaft of the power engine, and a second joint is connected to the rear end of the driven shaft of the auxiliary machine, and a thin cylindrical inner ring and a thick cylindrical inner ring are connected to the first joint. While connecting the inner ring of the elastic shock absorbing means, which is formed by stacking an elastic ring and a thin cylindrical outer ring sequentially on a concentric axis to form a roughly small cylindrical body with a small coefficient of inertia, a circular ring is connected to the second joint. The holder of the air clutch means is formed by stacking an annular outer holder, an annular air tube into which air can be freely injected, and an annular inner clutch shoe on a concentric shaft to form a roughly large cylindrical body. and the clutch means is disposed outside the elastic means on a concentric axis and in the same phase so that the outer ring faces the clutch shoe at a constant distance, and air When the air tube is expanded by filling the air tube, the clutch shoe comes into close contact with the outer ring, and the two are integrally coupled.Furthermore, the outer ring is provided with air circulation holes leading to the outside on its inner and outer surfaces to dissipate heat. 1. An elastic coupling device for a marine engine, characterized in that the elastic coupling device is formed in such a structure that heat generated due to the discontinuation of close contact between the clutch shoe and the outer ring is dissipated to the outside by a heat dissipation structure portion of the outer ring.