JP6612077B2 - Diaphragm coupling - Google Patents

Description

  The present invention relates to a diaphragm coupling that is interposed between two shafts to transmit rotational torque and absorb misalignment such as misalignment, angular displacement, or axial displacement between the two shafts.

  Conventionally, as shown in FIG. 8, there has been known a diaphragm coupling 51 in which a center tube 54 is coaxially connected via a diaphragm 53 between a pair of flanges 52 facing each other in the axial direction. One of the pair of flanges 52 is connected to the drive shaft side and the other 52B is connected to the driven shaft side, so that the rotational torque is transmitted and the diaphragm 53 made of a thin metal plate is deformed as described above. Absorbs misalignment.

JP-A-3-321 Japanese Utility Model Publication No. 1-1118228 Japanese Utility Model Publication No. 63-40630

  However, in the prior art described above, one diaphragm 53 is interposed between the flange 52 and the center tube 54 as illustrated.

  Therefore, the performance and durability of the coupling 51 as a whole are restricted by the specifications of the diaphragm 53, whereas the performance and durability of the coupling 51 are released from the range of the specifications of the diaphragm 53. Is required.

  In general, the diaphragm coupling has a feature that it must be damaged in place of the important device in order to prevent the important device from being damaged due to the nature of the product, but it is not intended to replace the important device. By the way, it is not preferable to break. In this regard, in the prior art, a resonance phenomenon may occur when vibrations, particularly vibrations having the same frequency as the natural frequency of the coupling, are input. If such a resonance phenomenon occurs, coupling is not intended. By the way, it may be damaged.

  In view of the above, an object of the present invention is to provide a diaphragm coupling capable of realizing performance and durability that cannot be obtained by using the above-mentioned single conventional diaphragm. In addition, another object of the present invention is to provide a diaphragm coupling that suppresses the occurrence of a resonance phenomenon in the coupling and can improve durability even in this respect.

The diaphragm coupling of the present invention, the diaphragm coupling formed by connecting the center tube coaxially through the pair of diaphragm between a pair of flanges facing each other in the axial direction, each of the pair of diaphragms, thick The thin film portion is provided between the inner peripheral mounting portion and the outer peripheral mounting portion, and a plurality of diaphragms are provided in parallel with a gap space between the respective film portions. by the inner with a peripheral surface with a plurality of diaphragms each being fixed to the outer peripheral surface of the center tube, the the one end portion side of the front Symbol center tube and the end of the one and the opposite end of the are flexible units, each comprising said plurality of diaphragms, between the plurality of diaphragms, two of different diameters Rubber ring is disposed of.

  When a plurality of diaphragms are provided in parallel, the plurality of diaphragms transmit rotational torque at the same time, so that the maximum allowable value of the transmission torque can be increased. In addition, increasing the thickness of a single diaphragm may interfere with the operability of the diaphragm, for example, making it difficult for the diaphragm to deform. If multiple diaphragms with a predetermined thickness are arranged in parallel, each diaphragm Due to the deformation, the diaphragm does not become difficult to deform. The plurality of diaphragms are each fixed to the outer peripheral surface of the center tube with the inner peripheral surface thereof, so that a flexible unit including the plurality of diaphragms and the center tube is preferable. According to this, the plurality of diaphragms Can be handled as a unit product together with the center tube, so that the handling workability can be improved.

  In addition, a gap space is set between the diaphragm membrane portions between the diaphragms in which a plurality of sheets are arranged in parallel. Therefore, in order to effectively use the gap space, an elastic body (in the equation of motion) It is conceivable to arrange an elastic body corresponding to the viscosity term. In this case, the elastic body causes a resonance phenomenon in the coupling by assuming a viscosity term corresponding to the natural frequency of the coupling. It is possible to suppress and thus prevent the coupling from being damaged. As an elastic body corresponding to the viscosity term in the equation of motion, for example, a rubber-like elastic body is interposed between diaphragms, or a viscoelastic substance is filled.

  The coupling resonance suppression structure based on the assumption of the viscosity term will be further described as follows.

  That is, for example, since the coupling resonance suppression structure is not provided in the prior art shown in FIG. 8, the resonance phenomenon is suppressed from occurring when vibration having the same frequency as the natural frequency of the coupling is input. I can't.

  On the other hand, when a coupling resonance suppression structure based on the assumption of the viscosity term is provided, it is possible to suppress the occurrence of a resonance phenomenon when a vibration having the same frequency as the natural frequency of the coupling is input. By providing an elastic body corresponding to the viscosity term in such a way that it acts in the axial direction, it is possible to suppress axial vibration during resonance. For example, when a rubber-like elastic body such as an O-ring or a square ring is mounted between a plurality of diaphragms, the rubber-like elastic body is compressed when an axial displacement difference occurs between the diaphragms. The vibration can be damped by the viscosity provided and the friction associated with the slight radial displacement.

  Further, by providing an elastic body corresponding to the viscosity term in the equation of motion so as to act in the axial direction and the circumferential direction, vibration in the axial direction or the circumferential direction during resonance can be suppressed. For example, if a plurality of diaphragms are filled with a viscoelastic substance and the diaphragms are bonded together, the viscoelastic substance is distorted when an axial or circumferential displacement difference occurs between the diaphragms. Vibration can be attenuated.

  According to the present invention, it is possible to achieve performance and durability that cannot be obtained by using a single diaphragm, and to suppress the occurrence of a resonance phenomenon in the coupling by installing an elastic body corresponding to a viscosity term. In addition, the coupling can be prevented from being damaged, and thus the durability of the coupling can be improved.

Front view in which the diaphragm coupling according to the first embodiment is partially cut away. Half cut sectional view of the flexible unit provided in the diaphragm coupling Half cut sectional view of the flexible unit with the number of diaphragms changed Half cut sectional view of the flexible unit provided in the diaphragm coupling according to the second embodiment Half cut sectional view of the flexible unit with the number of diaphragms changed Half cut sectional view of the flexible unit provided in the diaphragm coupling according to the third embodiment Half cut sectional view of the flexible unit with the number of diaphragms changed Front view in which a diaphragm coupling according to a conventional example is partially cut out

It will be described with reference to the drawings the actual施例the next.

First embodiment ...
Figure 1 shows a partially cut elevational da Ia Fulham coupling 11. The diaphragm coupling 11 has a basic configuration in which a center tube 16 is coaxially connected via a diaphragm 15 between a pair of flanges 13 facing each other in the axial direction. Further, the diaphragm 15 is configured as follows. Yes. The flange 13 is provided as a part of the hub 12 attached to a shaft (not shown).

  That is, as shown in an enlarged view in FIG. 2, the diaphragm 15 is provided with two diaphragms 15A and 15B arranged in parallel in the axial direction, and the two diaphragms 15A and 15B are synchronized in timing. Work the same way.

  Each of the diaphragms 15 is formed in a flat plate shape with a predetermined metal material, and a relatively thin film portion 15c is integrally formed between a relatively thick inner peripheral mounting portion 15a and an outer peripheral mounting portion 15b. The inner peripheral surface 15d is fixed to the outer peripheral surface of the center tube 16, and thereby a flexible unit (flexi unit) 14 composed of two diaphragms 15A and 15B and the center tube 16 is configured (the axial direction of the center tube 16). When two diaphragms 15A and 15B are provided at both ends, the flexible unit 14 is constituted by four diaphragms 15 and a center tube 16 for convenience. Fixing is by means of fitting, bonding or welding. Further, in this fixed state, the two diaphragms 15A and 15B are arranged so that the end faces of the inner peripheral attachment part 15a and the end faces of the outer peripheral attachment part 15b are in contact with each other, and the film part 15c is thin, so A gap space 15e is formed.

  The outer peripheral attachment portion 15b is provided with a through hole 15f for inserting an assembly bolt (reamer bolt) 18 with the position on the circumference aligned. Therefore, when the diaphragm 15 is attached to the flange 13, the diaphragm 15 is fastened to the flange 13 together with the guard 17 with an assembly bolt 18 as shown in FIG. The diaphragm 15 and the guard 17 may be assembled in advance by a rivet 19, and in this case, the flexible unit 14 is constituted by the two diaphragms 15A and 15B, the center tube 16 and the guard 17 (both ends in the axial direction of the center tube 16). When two diaphragms 15A and 15B and one guard 17 are provided in each part, the flexible unit 14 is constituted by four diaphragms 15, two guards 17 and a center tube 16 for convenience).

  In the diaphragm coupling 11 having the above configuration, since the two diaphragms 15A and 15B are provided in parallel and the two diaphragms 15A and 15B transmit the rotational torque at the same time, the maximum allowable value of the transmission torque is set. It is possible to increase. Further, when the thickness of one diaphragm 15 is increased, there is a possibility that the operation of the diaphragm 15 may be hindered. For example, when a plurality of diaphragms 15 having a predetermined thickness are arranged in parallel, Since each diaphragm 15 is deformed, the diaphragm 15 is not easily deformed. Accordingly, it is possible to provide the diaphragm coupling 11 that exhibits performance and durability that cannot be obtained when using one diaphragm.

  The number of diaphragms 15 arranged side by side is not limited to two, and may be three or more. In FIG. 3, three diaphragms are arranged in parallel as indicated by reference numerals 15A, 15B, and 15C.

Second embodiment ...
Figure 4 shows a flexible unit 14 provided in the full lexical Bull coupling, in this embodiment, the flexible unit 14 is constructed as follows.

  That is, the diaphragm 15 is provided in a state where two diaphragms 15A and 15B are arranged in parallel in the axial direction, and the two diaphragms 15A and 15B operate in the same manner at the same timing.

  Each of the diaphragms 15 is formed in a flat plate shape with a predetermined metal material, and a relatively thin film portion 15c is integrally formed between a relatively thick inner peripheral mounting portion 15a and an outer peripheral mounting portion 15b. The inner peripheral surface 15d is fixed to the outer peripheral surface of the center tube 16, whereby a flexible unit 14 composed of two diaphragms 15A and 15B and the center tube 16 is formed (at both axial ends of the center tube 16 respectively). When two diaphragms 15A and 15B are provided, the flexible unit 14 is configured by the four diaphragms 15 and the center tube 16 for convenience). Fixing is by means of fitting, bonding or welding. Further, in this fixed state, the two diaphragms 15A and 15B are arranged so that the end faces of the inner peripheral attachment part 15a and the end faces of the outer peripheral attachment part 15b are in contact with each other, and the film part 15c is thin, so A gap space 15e is formed.

  The outer peripheral attachment portion 15b is provided with a through hole 15f through which an assembly bolt is inserted in accordance with the position on the circumference. Therefore, when the diaphragm 15 is attached to the flange, the diaphragm 15 is fastened to the flange together with the guard with an assembly bolt. The diaphragm 15 and the guard may be assembled in advance by rivets. In this case, the flexible unit 14 is configured by the two diaphragms 15A and 15B, the center tube 16 and the guard (at the axial ends of the center tube 16 respectively). When two diaphragms 15A and 15B and one guard are provided, the flexible unit 14 is constituted by four diaphragms 15, two guards, and the center tube 16 for convenience).

An elastic body 21 corresponding to the viscosity term in the equation of motion is disposed between the two diaphragms 15A and 15B. In this embodiment, the elastic body 21 is disposed between the film portions 15c of the two diaphragms 15A and 15B. It is comprised by the rubber-like elastic body arrange | positioned in the clearance gap 15e.

  The rubber-like elastic body is formed into an annular shape, that is, a rubber ring, and a relatively small-diameter inner peripheral side rubber ring 22A and a relatively large-diameter outer peripheral side rubber ring 22B are arranged at predetermined intervals in the radial direction. Yes. A concavity 15g for positioning and holding these rubber rings 22A and 22B may be provided on the opposing end faces of the diaphragms 15A and 15B.

  In the diaphragm coupling 11 including the flexible unit 14 having the above-described configuration, the same effect as the first embodiment is exhibited, and the elastic body 21 corresponding to the viscosity term in the equation of motion is provided between the two diaphragms 15A and 15B. Since the rubber rings 22 </ b> A and 22 </ b> B are arranged, it is possible to suppress a resonance phenomenon from occurring in the coupling 11 by assuming a viscosity term corresponding to the natural frequency of the coupling 11, and thus the coupling 11 is damaged. It is possible to prevent this. Therefore, since the coupling 11 transmits rotational torque and absorbs misalignment, and exhibits a vibration damping effect, the multifunction of the coupling 11 can be realized.

  The number of the diaphragms 15 arranged side by side is not limited to two, and may be three or more. In FIG. 5, three diaphragms are arranged in parallel as indicated by reference numerals 15A, 15B, and 15C, which correspond to the viscosity terms in the equation of motion, respectively, between the diaphragms 15A and 15B and between the diaphragms 15B and 15C. An elastic body 21 (rubber rings 22A, 22B) is interposed.

Third embodiment ...
6 shows a flexible unit 14 provided in the full lexical Bull coupling, in this embodiment, the flexible unit 14 is constructed as follows.

  That is, the diaphragm 15 is provided in a state where two diaphragms 15A and 15B are arranged in parallel in the axial direction, and the two diaphragms 15A and 15B operate in the same manner at the same timing.

  Each of the diaphragms 15 is formed in a flat plate shape with a predetermined metal material, and a relatively thin film portion 15c is integrally formed between a relatively thick inner peripheral mounting portion 15a and an outer peripheral mounting portion 15b. The inner peripheral surface 15d is fixed to the outer peripheral surface of the center tube 16, whereby a flexible unit 14 composed of two diaphragms 15A and 15B and the center tube 16 is formed (at both axial ends of the center tube 16 respectively). When two diaphragms 15A and 15B are provided, the flexible unit 14 is configured by the four diaphragms 15 and the center tube 16 for convenience). Fixing is by means of fitting, bonding or welding. Further, in this fixed state, the two diaphragms 15A and 15B are arranged so that the end faces of the inner peripheral attachment part 15a and the end faces of the outer peripheral attachment part 15b are in contact with each other, and the film part 15c is thin, so A gap space 15e is formed.

  The outer peripheral attachment portion 15b is provided with a through hole 15f through which an assembly bolt is inserted in accordance with the position on the circumference. Therefore, when the diaphragm 15 is attached to the flange, the diaphragm 15 is fastened to the flange together with the guard with an assembly bolt. The diaphragm 15 and the guard may be assembled in advance by rivets. In this case, the flexible unit 14 is configured by the two diaphragms 15A and 15B, the center tube 16 and the guard (at the axial ends of the center tube 16 respectively). When two diaphragms 15A and 15B and one guard are provided, the flexible unit 14 is constituted by four diaphragms 15, two guards, and the center tube 16 for convenience).

An elastic body 21 corresponding to the viscosity term in the equation of motion is disposed between the two diaphragms 15A and 15B. In this embodiment, the elastic body 21 is disposed between the film portions 15c of the two diaphragms 15A and 15B. The viscoelastic material 23 is filled in the gap space 15e.

  In the diaphragm coupling 11 including the flexible unit 14 having the above-described configuration, the same effect as the first embodiment is exhibited, and the elastic body 21 corresponding to the viscosity term in the equation of motion is provided between the two diaphragms 15A and 15B. Since the viscoelastic material 23 is disposed, it is possible to suppress the occurrence of a resonance phenomenon in the coupling 11 by assuming a viscosity term corresponding to the natural frequency of the coupling 11, and thus the coupling 11 is damaged. It is possible to prevent. Therefore, since the coupling 11 transmits rotational torque and absorbs misalignment, and exhibits a vibration damping effect, the multifunction of the coupling 11 can be realized. Regarding the vibration damping effect, since the viscoelastic material 23 is disposed between the two diaphragms 15A and 15B, not only the vibration in the axial direction but also the vibration in the circumferential direction (twist direction) can be attenuated.

  The number of the diaphragms 15 arranged side by side is not limited to two, and may be three or more. In FIG. 7, three diaphragms are arranged in parallel as indicated by reference numerals 15A, 15B, and 15C, which correspond to the viscosity terms in the equation of motion, respectively, between the diaphragms 15A and 15B and between the diaphragms 15B and 15C. The elastic body 21 (viscoelastic substance 23) to be filled is filled.

DESCRIPTION OF SYMBOLS 11 Diaphragm coupling 12 Hub 13 Flange 14 Flexible unit 15, 15A, 15B, 15C Diaphragm 15a Inner peripheral attachment part 15b Outer peripheral attachment part 15c Film | membrane part 15d Inner peripheral surface 15e Space | gap space 15f Through-hole 15g Concave 16 Center tube 17 Guard 18 sets Attached bolt 19 Rivet 21 Elastic body 22A, 22B Rubber ring 23 Viscoelastic material

Claims (3)

In a diaphragm coupling formed by coaxially connecting a center tube via a pair of diaphragms between a pair of flanges facing each other in the axial direction,
Wherein each of the pair of diaphragms, with a gap space between the thin film portion double the number of sheets of diaphragms that have a of each film portion between the inner peripheral attaching portion and the outer mounting portion of the thick Provided in parallel,
By fixing the inner with a peripheral surface a plurality of sheets of diaphragm were the parallel on the outer peripheral surface of the center tube, one end side and the opposite end side of the end portion of the one of the previous SL center tube And a flexible unit including the plurality of diaphragms .
Two diaphragm rings having different diameters are disposed between the plurality of diaphragms . The diaphragm coupling according to claim 1, wherein
A diaphragm coupling characterized in that a concave portion for positioning and holding the rubber ring is provided on opposing end surfaces of the plurality of diaphragms . The diaphragm coupling according to claim 1 or 2,
The diaphragm coupling is characterized in that the rubber ring is an O-ring or a square ring.

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