JP2013061028A - Coupling and automobile tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling that can satisfy both of high revolution and high-torque transmission, and can inhibit the occurrence of torsional resonance, and that can be achieved in compact size.SOLUTION: The coupling 1 includes: a first-connection flange 2 made of metal which is fixed to the rotary shaft of a piece of rotating equipment on the driving side; a second-connection flange 5 made of metal which is fixed to the rotary shaft of the piece of rotating equipment on the driven side; an outer cylinder 3 made of metal one end of which is connected to the first-connection flange 2 to integrally rotate; a coupling shaft 4 made of metal which is disposed inside the outer cylinder 3 in a coaxial manner with the outer cylinder 3 with one end connected to the first-connection flange 2 to integrally rotate, and with the other end integrally connected to the second-connection flange 5; and an elastic member 6 disposed between the second-connection flange 5 and the outer cylinder 3.

Description

  The present invention relates to a coupling for connecting rotating shafts to each other, and an automobile test apparatus including the coupling.

  2. Description of the Related Art Conventionally, as a coupling for connecting rotating shafts, one having flanges for connecting the rotating shafts at both ends is known. Here, for example, when one rotary shaft is the drive shaft and the other rotary shaft is the driven shaft, the rotational torque on the drive shaft side can be transmitted to the driven shaft side via the coupling.

  By the way, in the shaft system for rotating the rotating shaft coupled via the coupling, the coupling acts as a torsion spring, and in the same rotational speed region as the natural frequency determined by the torsion spring constant, the entire shaft system is A torsional resonance phenomenon that vibrates with a much larger amplitude than other rotational speed regions occurs. When various performance tests are performed using a test apparatus (such as an automobile test apparatus) having such a shaft system, accurate measurement values (for example, torque measurement values) cannot be obtained due to the occurrence of torsional resonance. There is a problem that.

  Thus, focusing on the fact that the resonance frequency, which is the natural frequency determined by the torsion spring constant or the like, is high, an aspect in which the resonance frequency is cut by, for example, a low-pass filter is also considered. However, the mode using a filter is disadvantageous in that calculation processing is essential.

  In addition, as a coupling that prevents and suppresses the occurrence of torsional resonance, an elastic coupling that is configured to transmit torque (power) by a buffer member (sometimes called a spider) made of rubber, elastic resin, or the like. Has also been developed and put to practical use. Such an elastic coupling exhibits a damping property in which an elastic buffer member absorbs vibration.

  Further, the present applicant has invented a coupling having an inner and outer double shaft structure (see Patent Document 1 below). Specifically, a cylindrical outer connection shaft having high rigidity with connecting flange portions at both ends, and an inner connection shaft having a torsion spring constant different from that of the outer connection shaft and lower rigidity than the outer connection shaft. A double cylinder in which a gap formed in the radial direction between the outer connection shaft and the inner connection shaft shaft is filled with an elastic resin adhesive, and either one of the shaft ends of the connection shafts is integrally connected by a welding process. Coupling. With such a double cylindrical coupling, substantial torque transmission (power transmission) is performed by the outer connecting shaft, and the inner connecting shaft rotates (rotating) with the rotation of the outer connecting shaft. It acts like a “rotating weight” for the outer connecting shaft. Therefore, when such a double cylindrical coupling is torsionally resonated by rotating in the same rotational speed region as the natural frequency of the outer connecting shaft, and the amplitude is about to increase rapidly, Since the inner connecting shaft having a different natural frequency from the outer connecting shaft acts as a “rotation weight”, generation of torsional resonance in the outer connecting shaft can be suppressed.

JP 2008-32031 A

  However, in the elastic coupling, since the strength of the material constituting the elastic buffer member is low and power (torque) is transmitted through this low-strength elastic buffer member, high torque transmission is to be realized. If this is the case, high-speed rotation cannot be achieved, and torque must be reduced to achieve high-speed rotation. Thus, the elastic coupling has a demerit that both high-speed rotation and high torque cannot be achieved due to physical limitations of the elastic buffer member.

  On the other hand, since the coupling described in Patent Document 1 is configured to transmit torque via a highly rigid outer connecting shaft, both high-speed rotation and high torque transmission can be achieved. By the way, it is known that a larger vibration than a small vibration can be effectively suppressed by a rotating weight such as a damper or an inner connecting shaft. Therefore, if the torsion spring rigidity of the outer connecting shaft having high rigidity to which torque including torsional resonance is transmitted is set to be low in the coupling described in Patent Document 1, the torsional resonance is made more effective by the action of the inner connecting shaft. Can be suppressed.

  However, in the coupling described in Patent Document 1, the outer connecting shaft that is set to have a high strength in order to achieve both high-speed rotation and high torque transmission is the outer diameter of the inner connecting shaft disposed on the inner side (inner peripheral side). In order to reduce the torsion spring rigidity of the outer connecting shaft without lowering the strength of the material itself, the axial size (longitudinal dimension) must be set larger. There was no choice but to increase the size (lengthening) of the coupling. Although it is possible to reduce the torsion spring rigidity by setting the outer diameter of the outer connecting shaft to be small, the design of the outer connecting shaft is limited by the presence of the inner connecting shaft. There is a limit.

  The present invention has been made paying attention to such a problem, and its main purpose is to achieve both high rotation and high torque transmission, to suppress the generation of torsional resonance, and to achieve compactness. It is an object of the present invention to provide a possible coupling and an automobile test apparatus equipped with such a coupling.

  That is, the present invention includes a first metal connection flange portion fixed to the first rotation shaft and a second metal connection flange portion fixed to the second rotation shaft, and the first rotation shaft and the second rotation shaft. It is related with the coupling which mutually connects. Here, in the coupling according to the present invention, the first rotating shaft is an output-side rotating shaft and the second rotating shaft is an input-side rotating shaft, or the first rotating shaft is an input-side rotating shaft. When the second rotating shaft is an output-side rotating shaft, the first rotating shaft and the second rotating shaft can be connected to each other in either case.

  The coupling according to the present invention includes a metal outer cylinder whose one end is connected to the first connecting flange portion so as to be integrally rotatable, and is disposed coaxially with the outer cylinder on the inner side of the outer cylinder and has one end at the first end. A metal coupling shaft that is connected to the one connecting flange portion so as to be integrally rotatable and has a second connecting flange portion that is connected to the other end portion so as to be integrally rotatable, and an outer cylinder and the coupling shaft or the second connecting flange portion. And an elastic member interposed therebetween. Here, the coupling according to the present invention only needs to include the first connecting flange portion, the second connecting flange portion, the outer cylinder, the coupling shaft, and the elastic member, and the first connecting flange that is a metal part. The part, the second connecting flange part, the outer cylinder and the coupling shaft may be separate from each other, or two or more parts are integrally formed (for example, the first connecting flange part and the outer cylinder It may be formed integrally, the first connecting flange portion, the outer cylinder and the coupling shaft formed integrally, the coupling shaft and the second connecting flange portion formed integrally, or the like.

  With such a coupling, when one of the rotating shafts rotates, the torque is applied to either the first connecting flange portion or the second connecting flange portion, the coupling shaft, and the other connecting flange portion. The first connecting flange portion, the coupling shaft, and the second connecting flange portion that can transmit to the other rotating shaft and exhibit torque transmission function are all made of metal, so that torque can be transmitted at a high strength portion. It is possible to achieve both high torque and high rotation.

  Furthermore, in the case of the coupling according to the present invention, among the torque including torsional resonance, the direct current component that directly contributes to power transmission is transmitted through the metal part described above, while the resonance that does not contribute greatly to power transmission. The component is transmitted from the coupling shaft or the second connecting flange portion to the elastic member, and the elastic member shears and deforms using the outer cylinder as a scaffold to attenuate the torque of the resonance component. As a result, torsional resonance that can occur in the same rotational speed region as the natural frequency of the coupling can be effectively prevented and suppressed. Furthermore, in the coupling according to the present invention, since the coupling shaft is arranged on the inner side (inner peripheral side) of the outer cylinder, the outer cylinder can function as a cover member for the coupling shaft. Compared with an aspect directly exposed to the environment, the coupling shaft can be prevented from being damaged and the like, and the entire coupling shaft can be made compact as the diameter of the coupling shaft is reduced. In detail, the damping action by the elastic member can be obtained more efficiently with the coupling shaft having low torsion spring rigidity and easy to twist than the coupling shaft having high torsion spring rigidity and difficult to twist. In the coupling according to the invention, it is possible to set the outer diameter of the metal coupling shaft that does not require any other member on the inner peripheral side as small as possible without impairing the torque transmission function. Yes, the torsion spring rigidity of the coupling shaft can be set low by reducing the diameter. Therefore, it is possible to set the axial dimension of the coupling shaft as short as possible within a range in which the damping action by the elastic member can be obtained, and the entire coupling can be made compact.

  In the coupling of the present invention, a membrane plate can be attached to at least one flange portion. Thereby, when each connecting flange portion is fixed to the corresponding rotating shaft, the rotating shafts coupled to each other via the coupling of the present invention are on the same axis line by appropriately elastically deforming the membrane plate. Occurrence of a phenomenon that is not positioned (a phenomenon called misalignment or misalignment) can be prevented or suppressed.

  Moreover, the automotive test apparatus according to the present invention has a rotating shaft fixed to one of the coupling flange portion of the coupling having the above-described configuration and the first coupling flange portion or the second coupling flange portion of the coupling. It is characterized by comprising a rotating specimen and a pseudo load or pseudo driving source having a rotating shaft fixed to the other connecting flange portion. Here, examples of the rotating specimen include, for example, an electric motor, a generator, a transmission, and the like regardless of whether the rotating specimen is for an electric vehicle.

  Such an automobile test apparatus can achieve both high-speed rotation and high torque transmission based on the above-described coupling configuration, and can prevent and suppress torsional resonance. When performing various performance tests on the specimen, it is possible to obtain accurate test results excluding the influence of torsional resonance.

  According to the present invention, the torque is transmitted through the metal coupling shaft whose both ends are connected to the first metal connection flange and the second connection flange so as to be integrally rotatable, and the resonance component of the torque is elastic. By adopting a structure that attenuates by a member, it is possible to achieve both high-speed rotation and high torque transmission, to suppress the occurrence of torsional resonance, and to achieve a compact size, and such a cup. An automobile test apparatus having a ring can be provided.

1 is an overall schematic diagram of an automotive test apparatus to which a coupling according to an embodiment of the present invention is applied. Sectional drawing of the coupling which concerns on the same embodiment. FIG. 3 is an external view showing the coupling according to the embodiment in a partially broken view. FIG. 2 is a view corresponding to FIG. 2 showing a modification of the coupling according to the embodiment.

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

  The coupling 1 according to the present embodiment is applicable to, for example, the automobile test apparatus X shown in FIG. The vehicle test apparatus X includes, for example, a rotating specimen E such as an automobile engine, a pseudo load D such as a dynamometer, and a coupling 1 that connects the rotating shaft E1 of the rotating specimen E and the rotating shaft D1 of the pseudo load D. It is equipped with. In FIG. 1, an example in which the rotating shaft E1 of the rotating specimen E and the rotating shaft D1 of the pseudo load D are directly connected to the coupling 1 is illustrated, but torque between the rotating shafts D1 and E1 and the coupling 1 is illustrated. An appropriate detector or measuring device such as a detector may be interposed. The rotating specimen E and the pseudo load D are supported by a common support base B.

  As shown in FIGS. 2 and 3, the coupling 1 is a metal first connecting flange portion 2 that can be connected to the rotating shaft E <b> 1 of the rotating specimen E, and one end of the coupling 1 rotates integrally with the first connecting flange portion 2. An externally connected metal outer tube 3, and a metal coupling shaft that is disposed coaxially with the outer tube 3 inside the outer tube 3 and has one end connected to the first connecting flange portion 2 so as to be integrally rotatable. 4, a metal second connecting flange portion 5 provided at the other end portion of the coupling shaft 4 so as to be integrally rotatable, and an elastic member 6 interposed between the coupling shaft 4 and the outer cylinder 3. It is a thing.

  The first connection flange portion 2 includes a ring-shaped first connection flange main body 21 that can come into contact with a first disk portion 32 of an outer cylinder main body 31, which will be described later, and a coupling shaft disposed inside the first connection flange main body 21. 4 includes a first coupling shaft fixing portion 22 for fixing one end of the first connecting plate 4 and a first membrane plate 23 provided between the first coupling flange main body 21 and the first coupling shaft fixing portion 22. It is. In this embodiment, the metal 1st connection flange part 2 which has these 1st connection flange main bodies 21, the 1st coupling shaft fixing | fixed part 22, and the 1st film board 23 is applied.

  The first connection flange main body 21 is formed with a first screw hole 21a used when fixing the outer cylinder 3 and a first bolt insertion hole 21b used when connecting to the rotation shaft E1 of the rotating specimen E. Yes. In the present embodiment, the first screw holes 21a and the first bolt insertion holes 21b are alternately formed at a predetermined pitch in the circumferential direction of the first connecting flange body 21 (see FIG. 3).

  The first coupling shaft fixing portion 22 has a ring shape in which a first coupling shaft receiving hole 22a capable of receiving one end of the coupling shaft 4 is formed in the center, and a coupling shaft fixing bolt T1 can be inserted. The first coupling shaft fixing holes 22b are formed at a predetermined pitch in the circumferential direction.

  The first film plate 23 has a film thickness formed between the first coupling flange body 21 and the first coupling shaft fixing portion 22 of, for example, 0. It is a thin ring shape set to several mm. The outer peripheral edge of the first membrane plate 23 is continuous with the first connecting flange body 21, and the inner peripheral edge of the first membrane plate 23 is continuous with the first coupling shaft fixing portion 22. In the present embodiment, the circular hole 231 penetrating in the thickness direction of the first film plate 23 is predetermined in the radial direction so that the first film plate 23 can be appropriately elastically deformed when receiving an external force of a predetermined value or more. It is formed with a pitch.

  The outer cylinder 3 includes an outer cylinder main body 31, a first disk portion 32 extending in the radial direction from one end portion of the outer cylinder main body 31 and having the same outer diameter as the first connection flange portion 2, and other parts of the outer cylinder main body 31. It is made of a metal integrally provided with a second disk portion 33 extending in the radial direction from the end portion and having an outer diameter smaller than that of the first disk portion 32. The first disk portion 32 communicates with a first disk-side bolt insertion hole 32 a communicating with the first screw hole 21 a of the first connection flange body 21 and a first bolt insertion hole 21 b of the first connection flange body 21. And the 1st bolt accommodation hole 21b which can accommodate the head of bolt T3 typically shown in Drawing 2 is formed. The second disk portion 33 also has a second disk side bolt insertion hole 33a and a second bolt reception hole 33b corresponding to the first disk side bolt insertion hole 32a and the first bolt reception hole 21b of the first disk portion 32, respectively. doing. In the present embodiment, the thickness dimension of the second disk portion 33 is set larger than the thickness dimension of the first disk portion 32. Thereby, the arrangement space of the elastic member 6 to be described later can be ensured as much as possible in the limited space inside the coupling 1. Further, the coupling 1 of the present embodiment includes a first membrane plate in a portion of the first disk portion 32 of the outer cylinder main body 31 that faces the first membrane plate 23 of the first connection flange portion 2 in the axial direction A. In order to avoid contact with 23, a step 32d is formed. Similarly, a step portion 33d is provided on a portion of the second disk portion 33 of the outer cylinder main body 31 that faces a second membrane plate 53 described later in the axial direction A in order to avoid contact with the second membrane plate 53. Forming.

  Then, the flange fixing bolt T2 inserted into the first disk side bolt insertion hole 32a of the outer cylinder 3 (first disk portion 32) is connected to the first screw hole 21a of the first connection flange portion 2 (first connection flange body 21). The first connecting flange portion 2 can be fixed to one end portion of the outer cylinder 3 by being screwed to each other. In this fixed state, the first connecting flange portion 2 and the outer cylinder 3 can be integrally rotated.

  The coupling shaft 4 includes a coupling shaft main body 41 and flanges (first flange 42 and second flange 43) provided near both ends of the coupling shaft main body 41. In the present embodiment, a metal coupling shaft 4 in which a cylindrical coupling shaft main body 41 and a collar part (first collar part 42, second collar part 43) are integrally formed is applied. The first flange portion 42 is formed with a first coupling shaft fixing screw hole 42a that communicates with the first coupling shaft fixing hole 22b formed in the first coupling shaft fixing portion 22 of the first connecting flange portion 2. The second flange 43 has a second coupling shaft fixing screw that communicates with a first coupling shaft fixing hole 52b formed in a second coupling shaft fixing portion 52 of the second coupling flange portion 5 described later. A hole 43a is formed.

  Then, one end of the coupling shaft 4 (coupling shaft main body 41) is accommodated in the first coupling shaft accommodating hole 22a of the first coupling flange portion 2 (first coupling shaft fixing portion 22), and the coupling shaft The first coupling shaft fixing hole 22b of the first coupling flange portion 2 (first coupling shaft fixing portion 22) in a state where the first first flange portion 42 is in contact with the first coupling shaft fixing portion 22. One end of the coupling shaft 4 is engaged by screwing the inserted coupling shaft fixing bolt T1 into the first coupling shaft fixing screw hole 42a of the first coupling flange portion 2 (first coupling shaft fixing portion 22). The portion can be fixed to the first connecting flange portion 2.

  The second connection flange portion 5 includes a ring-shaped second connection flange main body 51 that can face the second disk portion 33 of the outer cylinder main body 31 in the axial direction A through a predetermined gap, and a second connection flange main body 51. A second coupling shaft fixing portion 52 disposed on the inner side for fixing the other end portion of the coupling shaft 4 and a second coupling shaft main body 52 provided between the second coupling flange body 51 and the second coupling shaft fixing portion 52. A two-film plate 53 is provided. In this embodiment, the metal 2nd connection flange part 5 which has these 2nd connection flange main bodies 51, the 2nd coupling shaft fixing | fixed part 52, and the 2nd film board 53 integrally is applied.

  The second connecting flange main body 51 has a second screw hole 51 a communicating with the second disk side bolt insertion hole 33 a of the second disk portion 33 and a second screw hole 51 b communicating with the second bolt receiving hole 33 b of the second disk portion 33. Bolt insertion holes 51b are formed. The outer diameter of the second connecting flange main body 51 is larger than the outer diameter of the second disk portion 33. The outer edge of the second connecting flange main body 51 is covered with the second disk portion 33 from the outer peripheral edge side. A projecting piece 51t that can form a space for filling the elastic member 6 between the two disk portions 33 is provided.

  The second coupling shaft fixing portion 52 has a ring shape in which a second coupling shaft receiving hole 52a capable of receiving the other end portion of the coupling shaft 4 is formed in the center, and a coupling shaft fixing bolt T1 can be inserted. The second coupling shaft fixing holes 52b are formed at a predetermined pitch in the circumferential direction.

  The second membrane plate 53 has a ring shape formed between the second coupling flange main body 51 and the second coupling shaft fixing portion 52, and has a film thickness of, for example, 0. It is set to several mm. The outer peripheral edge of the second membrane plate 53 is continuous with the second connecting flange body 51, and the inner peripheral edge of the second membrane plate 53 is continuous with the second coupling shaft fixing portion 52. In the present embodiment, the round holes 531 penetrating in the thickness direction of the second film plate 53 are formed at a predetermined pitch in the radial direction so that the second film plate 53 can be elastically deformed moderately when receiving an external force of a predetermined value or more. It is formed with.

  Then, the other end portion of the coupling shaft 4 (coupling shaft main body 41) is accommodated in the second coupling shaft accommodation hole 52a of the second coupling flange portion 5 (second coupling shaft fixing portion 52). With the second flange 43 of the shaft 4 in contact with the second coupling shaft fixing portion 52, the second coupling shaft fixing hole 52b of the second coupling flange portion 5 (second coupling shaft fixing portion 52). The coupling shaft fixing bolt T1 inserted into the second coupling flange portion 5 (second coupling shaft fixing portion 52) is screwed into the second coupling shaft fixing screw hole 43a, so that the coupling shaft 4 The 2nd connection flange part 5 can be fixed to an other end part.

  With the above-described configuration, the coupling 1 according to the present embodiment includes only the coupling shaft 4 having both end portions fixed to the connecting flange portions (the first connecting flange portion 2 and the second connecting flange portion 5) and one end portion. An outer cylinder 3 fixed to the connecting flange portion (first connecting flange portion 2), the other end of the outer cylinder 3 being a free end not fixed to the connecting flange portion, or a region near the other end, and a second An elastic member 6 is disposed between the connecting flange portion 5 and the connecting flange portion 5. Here, the outer cylinder 3 having the other end set as a free end does not exhibit a function of transmitting torque from the first connecting flange portion 2 to the second connecting flange portion 5. It is not an “axis”. That is, in the coupling 1 according to the present embodiment, the “shaft that exhibits the torque transmission function” is only the coupling shaft 4.

  In the present embodiment, the elastic member 6 is filled in a gap formed between the protruding piece portion 51 t provided on the outer edge portion of the second connection flange main body 51 and the outer peripheral edge of the second disk portion 33. In this filling process, for example, liquid resin injected from an injection port 33c (see FIG. 3) formed in the vicinity of the outer edge of the second disk portion 33, for example, a liquid resin is injected into the projecting piece portion 51t of the second connecting flange body 51 and the second disk. It can be realized by a process of spreading over the entire gap between the outer peripheral edge of the portion 33 and curing. The elastic member 6 of this embodiment formed by such a filling process becomes a ring-shaped member.

  The coupling 1 of the present embodiment having such a configuration includes the first bolt insertion hole 21b of the first connection flange portion 2 (first connection flange main body 21) and the first of the outer cylinder 3 (first disk portion 32). By screwing a bolt (T3 indicated by an imaginary line in FIG. 3) inserted into the bolt receiving hole 21b into a screw hole (not shown) formed in the flange portion E2 of the first rotating shaft E1, the first connecting flange portion 2 is engaged. Can be connected to the first rotating shaft E1 of the first rotating device E, and the second bolt receiving hole 33b and the second connecting flange portion 5 (second connecting flange main body of the outer cylinder 3 (second disc portion 33)). 51) by screwing a bolt (T3 indicated by an imaginary line in FIG. 3) inserted into the second bolt insertion hole 51b into a screw hole (not shown) formed in the flange portion D2 of the second rotating shaft D1. 2 Connecting flange 5 It can be coupled to the second rotary shaft D1 of the second rotary device D. Although misalignment (center misalignment between the rotation axes E1 and D1) may occur due to this connection process, the coupling 1 of the present embodiment is misaligned by the first film plate 23 and the second film plate 53 being elastically deformed. Can be absorbed.

  And the coupling 1 of this embodiment exhibits the function which transmits motive power (torque) from the 1st rotating shaft E1 to the 2nd rotating shaft D1. Specifically, when the rotating shaft E1 of the rotating specimen E rotates, the torque of the rotating specimen E rotates through the first connecting flange portion 2, the coupling shaft 4, and the second connecting flange portion 5 of the coupling 1, and the rotating shaft of the pseudo load D. Is transmitted to D1. The coupling 1 of the present embodiment has a high strength, high torque, and high speed rotation because the first connecting flange portion 2, the coupling shaft 4 and the second connecting flange portion 5 having a torque transmitting action are all made of metal. Can be compatible.

  Further, a torsional resonance phenomenon can occur in the same rotational speed region as the natural frequency of the coupling 1 (particularly, the coupling shaft 4). Can be prevented / suppressed. In other words, torque including torsional resonance is divided into a direct current component and a resonant component (alternating current component). The direct current component directly contributes to power transmission, but the resonant component does not greatly contribute to power transmission. Focusing on the fact, the coupling 1 of the present embodiment is configured to separate the torque including torsional resonance into a direct current component and a resonant component, and the direct current component includes the first connection flange portion 2, the coupling shaft 4, and the second connection. While transmitting through the flange portion 5, the resonance component is transmitted from the second connecting flange portion 5 to the elastic member 6, and the elastic member 6 shears and deforms using the outer cylinder 3 as a scaffold to attenuate the torque of the resonance component. Configured. In particular, in the present embodiment, the elastic member 6 is moved away from the rotation center of the coupling 1 (rotation center of the coupling shaft 4) in the radial direction (specifically, the second disk portion 33 of the outer cylinder 3). The elastic member 6 is coupled to the outer peripheral edge portion and a space between the outer peripheral edge portion and the projecting piece portion 51t provided on the outer edge portion of the second connecting flange portion 5 that faces the outer peripheral edge portion in the radial direction. Compared with the case where the elastic member 6 is disposed at a position close to the rotation center of 1 (the rotation center of the coupling shaft 4), the elastic member 6 can be greatly sheared and the resonance component of the torque can be attenuated more efficiently. it can.

  As described above, the coupling 1 according to the present embodiment transmits torque using the high-strength metallic coupling shaft 4 in which the metal coupling flange portions 2 and 5 are fixed to both ends so as to be integrally rotatable. Therefore, high rotation and high torque transmission can be achieved at the same time, and a resonance component that causes a torsional resonance phenomenon in the torque is attenuated by the elastic member 6 interposed between the second connecting flange portion 5 and the outer cylinder 3. Therefore, the generation of torsional resonance can be effectively suppressed.

  In addition, the damping action by the elastic member can be obtained more efficiently by the coupling shaft having low torsion spring rigidity and being easy to twist than the coupling shaft having high torsion spring rigidity and difficult to twist (in other words, large vibration is more elastic member). It is known that it is easy to be attenuated. Focusing on this point, the coupling 1 in the present embodiment employs a configuration in which the coupling shaft 4 is disposed inside the outer cylinder 3 and no other member is disposed inside the coupling shaft 4. The outer diameter of the coupling shaft 4 can be set as small as possible within a range that can withstand high torque transmission, and the coupling shaft 4 that functions as a torsion bar that has low torsion spring rigidity and is easy to twist can be realized. Therefore, the coupling 1 according to the present embodiment can efficiently attenuate the resonance component of the torque component transmitted through the coupling shaft 4 by the elastic member 6. Furthermore, the coupling 1 of the present embodiment sets the dimension in the axial direction A of the coupling shaft 4 as short as possible within the range in which the damping action by the elastic member 6 can be effectively obtained. The ring 1 as a whole can be made compact. In addition, the coupling 1 according to the present embodiment is configured such that the outer cylinder 3 functions as a cover member for the coupling shaft 4 and the coupling shaft 4 is damaged or damaged compared to a mode in which the coupling shaft 4 is directly exposed to the external environment. Deterioration and the like can be prevented / suppressed.

  In addition, this invention is not limited to embodiment mentioned above. For example, in the above-described embodiment, the first connecting flange portion, the outer cylinder, the coupling shaft, and the second connecting flange portion are configured separately, and one end portion of the outer cylinder and the cup are formed by appropriate fixing means such as bolts. While the embodiment in which one end of the ring shaft is connected to the first connecting flange and the other end of the coupling is connected to the second connecting flange is illustrated, as shown in FIG. The coupling 101 may integrally include the flange portion 102, the outer cylinder 103, the coupling shaft 104, and the second connecting flange portion 105). This figure is a simplified schematic diagram of the coupling 101, and the elastic member 106 is also shown corresponding to FIG. Although not shown, the first connecting flange portion, the outer cylinder, and the coupling shaft are integrally formed, and the other end portion of the coupling shaft is connected to the second connecting flange portion separately from these by an appropriate fixing means. The coupling, the first connecting flange portion and the outer cylinder are integrally provided, the coupling shaft and the second connecting flange portion are integrally provided, and one end of the coupling shaft is appropriately fixed to the first connecting flange portion. Couplings connected by means may be used, and which parts (parts) are integrated can be arbitrarily set.

  Moreover, it can also be set as the coupling which interposed the elastic member between the outer cylinder and the coupling axis | shaft. Even in such a mode, the resonance component of the torque including torsional resonance is transmitted from the coupling shaft to the elastic member, and the elastic member shears and deforms using the outer cylinder as a scaffold to attenuate the resonance component of the torque. It is possible to prevent and suppress torsional resonance. When the elastic member is interposed between the outer cylinder and the coupling shaft, the elastic member may be interposed in the entire gap between the outer cylinder and the coupling shaft, or a plurality of elastic members may be arranged in the axial direction. It is also possible to set.

  As the elastic member, a material made of a rubber material or a material made of a clay-like substance in which particles are mixed with a fluid can be applied in addition to a resin material. Moreover, you may apply the elastic member already formed in the predetermined shape (for example, ring shape) at the time before arrange | positioning in a coupling. Note that the elastic member has a better damping effect as the loss factor is higher.

  As the coupling shaft, a solid shaft can be used instead of a cylindrical shape (see FIG. 4).

  Moreover, the coupling which attached the film | membrane board only to any one connection flange part, and the coupling which does not attach the film | membrane board to any connection flange part may be sufficient.

  Moreover, the test apparatus for vehicles which concerns on this embodiment can also apply a test body other than an engine, for example, an electric motor, a transmission, etc. as a rotation test body, or can apply a pseudo drive source instead of a pseudo load.

  Furthermore, the coupling according to the present invention is used in such a manner that the first connecting flange portion is connected to the output side rotating shaft so as to be integrally rotatable, and the second connecting flange portion is connected to the input side rotating shaft so as to be integrally rotatable. It is also possible.

  Further, the coupling of the present invention can also be applied to the coupling of rotating shafts in apparatuses other than the automobile test apparatus.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1, 101 ... Coupling 2, 102 ... 1st connection flange part 3, 103 ... Outer cylinder 4, 104 ... Coupling shaft 5, 105 ... 2nd connection flange part 6, 106 ... Elastic member 23, 53 ... Membrane plate ( 1st membrane plate, 2nd membrane plate)
D ... 2nd rotating device D1 ... 2nd rotating shaft E ... 1st rotating device E1 ... 1st rotating shaft

Claims (3)

A metal first connecting flange portion fixed to the first rotating shaft and a metal second connecting flange portion fixed to the second rotating shaft are provided, and the first rotating shaft and the second rotating shaft are connected to each other. Coupling to
A metal outer cylinder having one end connected to the first connecting flange so as to be integrally rotatable;
The outer cylinder is arranged coaxially with the outer cylinder, and one end is connected to the first connecting flange so as to be integrally rotatable, and the second connecting flange is connected to the other end so as to be integrally rotatable. A metal coupling shaft;
A coupling comprising: an elastic member interposed between the outer cylinder and the coupling shaft or the second connecting flange portion. The coupling according to claim 1, wherein a membrane plate is attached to at least one flange portion. The coupling according to claim 1 or 2,
A rotating specimen having a rotating shaft fixed to any one of the first connecting flange part and the second connecting flange part of the coupling;
A test apparatus for an automobile, comprising a pseudo load or a pseudo drive source having a rotating shaft fixed to the other connecting flange portion.

Images