JP4743530B2 - Shaft coupling structure - Google Patents

Description

  The present invention relates to a shaft connection structure, and more particularly to a shaft connection structure that removably connects a stirring shaft inserted into an experimental reaction vessel and a drive shaft connected to a drive source.

In a stirrer used on a test bench in a synthesis reaction experiment, etc., a drive source is installed above the reaction vessel, and the upper end of the agitation shaft is connected to a drill chuck of the drive source and the lower end is inserted into the reaction vessel ( For example, refer to Patent Document 1), or a structure in which a drive shaft connected to a drive source and a stirring shaft inserted into a reaction vessel are connected by a flexible rubber member (for example, refer to Patent Document 2). Yes. Moreover, when evacuating the inside of the reaction vessel, a rotary vacuum seal through which the stirring shaft is rotatably inserted is attached to the mouth of the reaction vessel. On the other hand, when coupling the shafts, a flexible coupling is generally interposed between the shafts in order to absorb the eccentricity and declination of both shafts (see, for example, Patent Document 3). .
JP 2004-329999 A JP 2003-103154 A JP 2002-506957 A

  The agitator as described above generally adjusts the position of the driving source clamped to the lattice member or the experimental stand installed behind the experimental table on which the reaction vessel is installed, and is inserted into the reaction vessel. And the agitation shaft is used in the vertical direction. At this time, in the case where a long stirring shaft is held by a drill chuck, when the reaction vessel is removed after the stirring operation is finished, the drill chuck is loosened to disconnect the stirring shaft from the drive source, and the direction of the stirrer (direction of the drill chuck) After changing the above, it was necessary to pull the stirring shaft upward from the reaction vessel. For this reason, the next time the agitation operation is performed, the position of the drive source must be adjusted again.

  Furthermore, since it is difficult to make the center of the reaction vessel coincide with the axis of the stirring shaft, the stirring shaft and the reaction vessel are sometimes operated while being eccentric and deviated from each other. When the agitation shaft is directly connected to the drive source, vibration may occur due to the eccentricity or declination of the agitation shaft, and when a rotary vacuum seal is attached to the container mouth, even a slight eccentricity or declination may occur. The stirring shaft comes into contact with the rotating vacuum seal, and the seal is unevenly worn, which deteriorates durability.

  If the drive shaft and the agitation shaft are connected by a flexible rubber member, the eccentricity and declination can be absorbed. However, the rubber member is likely to deteriorate, and there is a risk of slipping when oil adheres to the contact surface. Furthermore, in order to securely connect the drive shaft and the stirring shaft to the rubber member, the connecting operation must be performed with both hands, which is troublesome. In addition, it is possible to absorb the eccentricity and declination using a commercially available flexible coupling, but a tool is required to connect and detach the drive shaft and stirring shaft with the flexible coupling. There were difficulties.

  Therefore, the present invention can detachably connect the drive shaft and the driven shaft with a simple operation, and a shaft connection structure of the drive shaft on the drive source side of the stirrer and the stirring shaft (driven shaft) on the reaction vessel side. By applying to the above, the drive shaft and the stirring shaft can be detachably connected with a simple operation, the reaction vessel can be easily installed and removed, and the eccentricity of the drive shaft and the stirring shaft, An object of the present invention is to provide a shaft coupling structure capable of easily incorporating a flexible coupling for absorbing declination.

In order to achieve the above object, the shaft coupling structure of the agitator according to the present invention is a shaft coupling structure that removably couples a drive shaft and a driven shaft, and is attached to the shaft end of one of the drive shaft and the driven shaft. A male side connection flange is provided, and a female side connection flange is provided at the shaft end of the other shaft. A plurality of connection bosses projecting in the direction of the female side connection flange are provided on the male side connection flange. Has a large-diameter head at the protruding end and a small-diameter shaft on the base side of the large-diameter head, and the female-side connecting flange is provided with a boss insertion hole through which the connecting boss can be inserted. The shaft provided with a shaft has a shaft insertion hole through which the shaft can be inserted, and an engagement ring having a plurality of elongated holes that can be engaged with the plurality of connecting bosses around the shaft insertion hole. The long hole has a large-diameter head of the connecting boss at one end thereof. A boss insertion portion having a diameter that allows passage, and a slit having a width that is narrower than the diameter of the large-diameter head and that allows the small-diameter shaft portion of the connecting boss to move at the center of a long hole continuous to the boss insertion portion. parts and, from said elongated hole and the other end the female-side connecting flange of the continuous to the slit portion on the far side is provided a large-diameter head portion engageable engagement step, the said engagement ring female provided with a biasing means between the coupling flange, characterized in that a stopper member for restricting the amount of movement in a direction away from the female-side connection flange of the engaging ring by the biasing means, the drive shaft One end of the flexible coupling may be connected to the shaft end of one of the driven shaft and the driven shaft, and the male connection flange may be provided to the other end of the flexible coupling.

Furthermore, the engagement ring is formed by joining two ring members, and both ring members are provided with a large-diameter hole for forming a boss insertion portion and a slit for forming the slit portion, respectively, and the female A large-diameter hole for forming an engaging step portion can be provided at the end of the slit of the ring member on the side far from the side connecting flange , and the biasing means is a coil spring mounted around an axis. A ring-shaped recess for accommodating one end of the coil spring can be provided on the female connection flange side of the engagement ring. Furthermore, the driven shaft may be a stirring shaft inserted into the reaction vessel.

  According to the shaft coupling structure of the present invention, the plurality of coupling bosses protruding from the male coupling flange are inserted into the boss insertion hole provided in the female coupling flange and the long boss insertion portion provided in the engagement ring. After that, the drive shaft and the driven shaft are connected simply by rotating the engagement ring so that the large-diameter head engages with the engagement step portion of the long hole while pushing the engagement ring toward the female connection flange. The rotational force of the drive shaft can be transmitted to the driven shaft through the boss insertion hole of the female side connection flange and the connection boss of the male side connection flange. In this connected state, the engagement ring is urged by the urging means to maintain the engagement state between the large-diameter head and the engagement stepped portion, so that the engagement ring is pushed toward the female connection flange. As long as it is not moved and rotated, the connected state does not come off. To release the connection, simply rotate the engagement ring in the direction opposite to the connection direction so that the large-diameter head is positioned at the boss insertion part of the long hole while pushing the engagement ring toward the female connection flange. It can be carried out. Therefore, the drive shaft and the driven shaft can be easily connected and disassembled with one hand.

  In addition, by providing a male coupling flange on the flexible coupling connected to one shaft end, the drive shaft and driven shaft can be easily connected via the flexible coupling without using a tool. It is possible to absorb the eccentricity and declination between the drive shaft and the driven shaft. By applying such a shaft coupling structure incorporating a flexible coupling to a stirrer, mounting errors between the experimental stand and the lattice member that support the stirrer drive source, and mounting between the drive source and the drive shaft Because it can absorb errors, eccentricity and declination between the drive shaft and the stirring shaft, the stirrer can be easily assembled to the reaction vessel, and the reaction source can be removed with the drive source clamped. Easy to do. In particular, since the setting of the stirrer and the reaction vessel is frequently changed at the laboratory level, simplification of attachment / detachment between the drive shaft and the stirring shaft and simplification of position adjustment of the drive source are significant effects.

  FIGS. 1 to 4 are views showing an embodiment in which the shaft coupling structure of the present invention is applied to a stirrer. FIG. 1 is a schematic front view showing a use state of the stirrer, and FIG. 2 is a main part of the stirrer. FIG. 3 is an exploded perspective view, FIG. 3 is a cross-sectional view of a main part of the stirrer, and FIG.

  The stirrer 1 according to this embodiment is used by being clamped by an experimental stand installed on a laboratory table (not shown), and a flask 10 that is a reaction container in which the reaction liquid L is stored is disposed on the experimental table. ing. The stirrer 1 includes a stirring motor 20 serving as a driving source, a driving shaft 30 connected to a motor shaft 21 of the stirring motor 20 by a drill chuck 22, and a stirring shaft (driven shaft) 40 inserted into the flask 10. A male coupling that includes two coupling bosses 60 provided on the drive shaft coupling side of the flexible coupling 50 and a flexible coupling (flexible coupling) 50 fixed to the upper end of the stirring shaft 40 A flange 61, a female coupling flange 31 provided integrally on the flexible coupling coupling side of the drive shaft 30, an engagement ring 70 mounted on the drive shaft 30 so as to be movable and rotatable in the axial direction; A coil spring (biasing means) 80 and an E ring 81 (stopper member) provided so as to sandwich the engagement ring 70 are provided.

  The flask 10 is evacuated inside, and a rotary vacuum seal 11 is attached to the mouth portion 10a. The stirring shaft 40 is made of metal or glass and has a stirring blade 41 at the tip, the tip side is inserted into the flask 10 through the rotary vacuum seal 11, and the base end side is attached to the flexible coupling 50. The drive shaft 30 is made of metal, the base end side is connected to the motor shaft 21 by the drill chuck 22, and the female side connection flange 31 connected to the male side connection flange 61 is integrally provided at the distal end.

  The flexible coupling 50 is made of stainless steel, and a stainless steel bellows 53 that serves as an intermediate elastic portion includes a driving side plate 51 that rotates on the same axis as the driving shaft 30 and a driven side plate 52 that rotates on the same axis as the stirring shaft 40. It is formed by connecting with. The upper end portion of the stirring shaft 40 is inserted into the center portion of the driven plate 52 and is fixed by a fixing screw 54.

  The male side connection flange 61 provided on the upper surface of the drive side plate 51 has a disk shape having the same outer diameter as the drive side plate 51, and the connection bosses 60, 60 are provided on the upper surface of the male side connection flange 61. A flange fixing shaft 62 projects from the center of the lower surface. The male connection flange 61 is configured such that the flange fixing shaft 62 is inserted into a shaft mounting hole 51 a provided at the center of the driving side plate 51 of the flexible coupling 50 and is fixed by a fixing screw 54. It is attached integrally to the upper surface of The connecting boss 60 cuts the upper outer periphery of the cylindrical member to form a large-diameter head 60a having the same diameter as the base at the upper end, and a small-diameter shaft continuously on the base side of the large-diameter head 60a. A portion 60b is formed.

  The female side connection flange 31 at the lower end of the drive shaft 30 is formed to have substantially the same diameter as the male side connection flange 61, and boss insertion holes 31a and 31a through which the connection bosses 60 and 60 are inserted are formed. The connection bosses 60, 60 and the female connection flange 31 are connected to the connection bosses 60, 60 from the boss insertion holes 31a, 31a when the connection bosses 60, 60 are inserted into the boss insertion holes 31a, 31a. The large-diameter head portions 60 a and 60 a and the small-diameter shaft portions 60 b and 60 b are formed so as to protrude from the upper surface of the female-side connecting flange 31.

  The engagement ring 70 is attached to the drive shaft 30 via the coil spring 80 on the upper part of the female side connection flange 31, and the E ring that engages with a circumferential groove 30 a formed in the drive shaft 30. The upward movement is restricted by 81. The engagement ring 70 is formed by joining two ring members 71 and 72 made of a substantially hexagonal plate material up and down by welding or the like, and a shaft insertion hole 70a through which the drive shaft 30 is inserted is provided at the center. In addition, two elongated holes 73 with which the connecting bosses 60 and 60 are engaged are provided symmetrically with respect to the center on the outer periphery of the insertion hole 70a.

The lower ring member 71 has a central large-diameter hole 71a through which the coil spring 80 can be inserted at the center, a lower slit portion 71b for forming the elongated hole 73, and one end of the lower slit portion 71b. A boss insertion portion 71c having a large-diameter hole is provided, and a portion from the boss insertion portion 71c to the other end 71d of the lower slit portion 71b constitutes a lower half portion of the long hole 73. The upper ring member 72 has a central small-diameter hole 72a smaller than the inner diameter of the coil spring 80 and the E-ring 81, through which the drive shaft 30 can be inserted, and an upper slit portion 72b for forming the long hole 73. When provided with Rubo scan insertion part 72c such a large-diameter hole provided at one end of the upper slit portion 72b, and the boss-engaging portion 72d made of the large-diameter hole provided at the other end of the upper slit portion 72b is The boss insertion portion 72c, the upper slit portion 72b, and the boss engagement portion 72d constitute the upper half of the long hole 73.

That is, each long hole 73 of the engagement ring 70 has a boss insertion portion 73a composed of boss insertion portions 71c and 72c through which the large-diameter head portion 60a of the connection boss 60 can be inserted, and a length continuous to the boss insertion portion 71b. At the center of the hole 73, a slit part 73b having a width narrower than the diameter of the large-diameter head part 60a and allowing the small-diameter shaft part 60b to move, and the other end of the long hole 73 continuing to the slit part 73b A boss engaging portion 72d of the upper ring member 72 capable of engaging with the large-diameter head 60a is located on the side far from the female side connecting flange, and a lower slit of the lower ring member 71 on the female side connecting flange side. The other end 71d of the portion 71b is formed with an engaging stepped portion 73c formed by a stepped hole. Further, on the lower surface of the center portion of the engagement ring 70, a ring-shaped recess having a large diameter on the female side connecting flange side by the central large-diameter hole 71a of the lower ring member 71 and the central small-diameter hole 72a of the upper ring member 72 is provided. 70b is formed, and the upper end of the coil spring 80 provided in a compressed state is accommodated in the recess 70b.

  In the stirrer 1 formed as described above, the drive shaft 30 is attached to the motor shaft 21 of the agitation motor 20 via the drill chuck 22, and the agitation motor 20 is set so that the axis of the drive shaft 30 faces the vertical direction. Secure to a laboratory stand. Furthermore, the rotary vacuum seal 11 equipped with the stirring shaft 40 with the flexible coupling 50 is attached to the mouth portion 10a of the flask 10 containing the reaction liquid L, the axis of the stirring shaft 40 passes through the center of the flask 10, and Set it so that it faces vertically.

The flask 10 is installed below the stirrer 1, and the stirring shaft 40 is lifted up with the boss insertion portion 73 a of the long hole 73 aligned with the boss insertion holes 31 a and 31 a of the female connection flange 31 to raise the male connection flange 61. Are connected to the boss insertion holes 31a and 31a and the boss insertion portion 73a, respectively. In this state, when the engagement ring 70 is rotated several tens of degrees in the clockwise direction while being pushed toward the female connection flange 31 (downward) against the urging force of the coil spring 80, the engagement ring 70 is After the small-diameter shaft portion 60b passes through the slit portion 73b, the small-diameter shaft portion 60b rotates to a position where the large-diameter head portion 60a engages with the engaging step portion 73c. When the pushing of the engagement ring 70 is released in this state, the engagement ring 70 moves to the side (upward) away from the female side connection flange 31 by the urging force of the coil spring 80, and the large-diameter head 60a is moved to the engagement stage. It will be in the state fixed by engaging with the part 73c. Thereby, the drive shaft 30 and the stirring shaft 40 are connected via the flexible coupling 50.

  In this state, the connection boss 60 engaged with the engagement ring 70 is attracted to the engagement ring 70 side by the urging force of the coil spring 80, so that the male side connection flange 61 and the female side connection flange 31 are connected to each other. The connecting surfaces are in close contact with each other, and play at the connecting portion can be prevented. In addition, by providing an elastic body such as rubber on the connecting surface, it is possible to more reliably prevent backlash of the connecting surface even when the drive shaft 30 and the agitation shaft 40 have a large eccentricity and deviation angle.

  When removing the flask 10 from the stirrer 1, the position of the large-diameter head 60a is moved from the engagement step 73c to the boss insertion portion by rotating the engagement ring 70 counterclockwise while pushing it. When the stirring shaft 40 is lowered by the length of the connecting boss 60 while being moved to 73 a, the connecting boss 60 is pulled downward from the boss insertion hole 31 a to connect the male side connecting flange 61 and the female side connecting flange 31. The state can be released. Thereby, since the drive shaft 30 and the stirring shaft 40 can be disassembled, the flask 10 can be removed without changing the direction of the stirring motor 20, and the position and direction of the stirring motor 20 are maintained. Next, it is not necessary to adjust the position of the stirring motor 20 or the like when performing the stirring work.

  Furthermore, since the flexible coupling 50 can be easily and reliably assembled, the eccentricity and the declination of the drive shaft 30 and the stirring shaft 40 can be reduced by incorporating the flexible coupling 50 as shown in FIG. The rotational force can be reliably transmitted while absorbing. This eliminates the need for precise adjustment of the position of the experimental stand and the agitation motor 20 and the adjustment of the agitation motor 20 and the drive shaft 30, improves workability, and damages the rotary vacuum seal 11. Can be suppressed. Further, slip due to adhesion of oil does not occur unlike a rubber member. In particular, compared to the case where the drive shaft 30 and the stirring shaft 40 are directly connected via the flexible coupling 50, a tool for loosening or tightening the fixing screw 54 is not required, and the attachment and detachment can be easily performed in a short time. In addition to being able to do this, there is no worry of forgetting to remove the tool and driving, and the safety of the work is improved.

  Further, since the transmission of the rotational force is performed by the engagement between the connection boss 60 of the male side connection flange 61 and the boss insertion hole 31a of the female side connection flange 31, not only the rotation force can be transmitted reliably but also slip occurs. There is no restriction on the direction of rotation. In addition, no rotational force acts on the engagement ring 70, and when the connecting boss 60 is engaged, a large-diameter head is formed on the engagement step 73 c of the engagement ring 70 urged upward by the coil spring 80. Since the portion 60a is engaged, the engaged state is not released unless it is rotated while pushing the fixing ring against the urging force of the coil spring 80, and it is inadvertently engaged with the connecting boss 60. The engagement with the ring 70 is not released. Further, since the engagement ring 70 is urged upward, the large-diameter head 60a is engaged by releasing the pushing of the engagement ring 70 in the middle of connection and rotating the engagement ring 70. When engaged with the stepped portion 73c, a snapping sound can be heard to confirm the engaged state. Furthermore, by accommodating the upper end of the coil spring 80 in the recess 70b, the coil spring 80 can be held in a stable state.

  The present invention can also be applied to a case where a flexible coupling is not incorporated, and it is also possible to provide a flexible coupling on the drive shaft side, contrary to the above-described embodiment. Moreover, it is also possible to arrange | position a flexible coupling in the intermediate part of a drive shaft or a stirring shaft by forming the flange fixing shaft fixed to the end of a flexible coupling long. Further, two or more connecting bosses and long holes can be provided, and the engagement ring can be formed by processing one plate material, or the whole can be integrally formed of a casting.

It is a use state figure of the stirrer which shows one example of this invention. It is a principal part disassembled perspective view of a stirrer similarly. It is a principal part expanded sectional view similarly. It is explanatory drawing which similarly shows the connection operation | work of a drive shaft and a stirring shaft.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Stirrer, 10 ... Flask, 10a ... Mouth part, 11 ... Rotary vacuum seal, 20 ... Stirring motor, 21 ... Motor shaft, 22 ... Drill chuck, 30 ... Drive shaft, 30a ... Circumferential groove, 31 ... Female side connection Flange, 31a ... boss insertion hole, 40 ... stirring shaft, 41 ... stirring blade, 50 ... flexible coupling, 51 ... drive side plate, 51a ... shaft mounting hole, 52 ... driven side plate, 53 ... stainless bellows, 54 ... fixed Screw 60, connecting boss 60a, large-diameter head, 60b, small-diameter shaft, 61 ... male-side connecting flange, 62 ... flange fixing shaft, 70 ... engagement ring, 70a ... insertion hole, 70b ... recess, 71 ... Lower ring member, 71a: central large-diameter hole, 71b ... slit part, 71c ... boss insertion part, 72 ... upper ring member, 72a ... central small-diameter hole, 72b ... slit part, 72c ... boss insertion Parts, 72d ... boss engaging portion, 73 ... elongated hole, 73a ... boss insertion portion, 73b ... slits, 73c ... engaging step portion, 80 ... coil spring, 81 ... E Ring

Claims (5)

In a shaft coupling structure that removably couples a drive shaft and a driven shaft, a male connection flange is provided at the shaft end of one of the drive shaft and the driven shaft, and a female connection flange is provided at the shaft end of the other shaft. A plurality of connecting bosses protruding in the direction of the female connecting flange are provided on the male connecting flange, and the connecting boss has a large-diameter head at the protruding end and a base side of the large-diameter head; A small-diameter shaft portion is provided, a boss insertion hole through which the connection boss can be inserted is provided in the female side connection flange, and a shaft insertion hole through which the shaft can be inserted into the shaft provided with the female side connection flange. And an engaging ring having a plurality of elongated holes that engage with the plurality of connecting bosses around the shaft insertion hole, respectively, is rotatably mounted. The elongated hole has a large connecting boss at one end thereof. A boss insertion portion having a diameter through which the diameter head can be inserted, and the boss insertion portion continuous A slit portion small diameter portion of the connecting bosses in the narrow than the diameter of the large-diameter head portion at the center portion of the long hole has a width capable mobile, the female side of the other end of the elongated hole that is continuous with the slit portion An engagement step portion on which the large-diameter head can be engaged is provided on the side far from the connection flange, and an urging means is provided between the engagement ring and the female-side connection flange. shaft connecting structure characterized in that a stopper member for restricting the amount of movement in a direction away from the female-side connection flange of the engagement ring.   One end of a flexible coupling is connected to the shaft end of one of the drive shaft and the driven shaft, and the male connection flange is provided at the other end of the flexible coupling. Item 1. The shaft coupling structure according to Item 1. The engagement ring is formed by joining two ring members, and each ring member is provided with a large-diameter hole for forming a boss insertion portion and a slit for forming the slit portion, and the female side connection 3. The shaft coupling structure according to claim 1, wherein a large-diameter hole for forming an engaging step portion is provided at an end portion of the slit of the ring member on the side far from the flange .   2. The coil spring mounted around the shaft of the biasing means, and a ring-shaped recess for receiving one end of the coil spring is provided on the female side connecting flange side of the engagement ring. The shaft coupling structure according to any one of claims 1 to 3.   The shaft connection structure according to any one of claims 1 to 4, wherein the driven shaft is a stirring shaft inserted into the reaction vessel.

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