JPS62127515A - Gear type flexible joint - Google Patents

Abstract

PURPOSE:To prevent galling and biting from occurring, by constituting a stopper mechanism in a way of setting up the stopper receiving surface formed in each end face of a driving shaft and a driven shaft and both first and second stopper members coupled with a turnbuckle, on both axial centers. CONSTITUTION:A first stopper member 13 and a second stopper member 14 are coupled with a turnbuckle 12, and they are set up on an axial center between end faces of a driving shaft 1 and a driven shaft 2. In addition, a first stopper mechanism 15 restricting axial movement of the driving shaft 1 is constituted of the stopper receiving surface 16 formed in the center of each end face of the first stopper member 13 and the driving shaft 1, while a second stopper mechanism 17 of the driven shaft 2 is constituted of the second stopper member 14 and a stopper receiving surface 18. Therefore, when the driving shaft 1 or the driven shaft 2 moves in the axial direction, each of stopper members 14 and 15 comes into contact with these stopper receiving surfaces 16 and 18, whereby shifting of more than that extent is checked, thus galling and biting into the stopper receiving surface are preventable.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a gear-type flexible joint that transmits the rotational torque of a drive shaft to a driven shaft in a rotating machine, and particularly relates to a gear-type flexible joint that transmits the rotational torque of a drive shaft to a driven shaft in a rotating machine. This invention relates to a restricting stopper mechanism.

[Background of the invention]

As a gear type flexible joint, Utility Model Publication No. 44-26339.

There is one disclosed in Utility Model Publication No. 47-14804. In this type of gear type flexible joint, the drive shaft is The amount of axial movement of the driven shaft should be kept to the minimum even including elongation due to thermal expansion (normally the drive shaft,
It is necessary to keep the width of both driven shafts to about 1 mm). Therefore,
The l-movement type flexible joint is equipped with a stopper mechanism that limits the amount of axial movement of the drive shaft and the driven shaft.

Next, a conventional example of the gear type flexible joint will be explained with reference to FIGS. 3 and 4. In the figure, 1 is a drive shaft, 2 is a driven shaft, 3 is a cylindrical joint spacer interposed between the end faces of the drive shaft 1 and driven shaft 2, and 4 is an outer spacer fitted on the outer periphery of the drive shaft 1. A gear 5 is an external gear 6 fitted on the outer periphery of the driven shaft 2.
7 is an internal gear fixed to one end of the joint spacer 3 and meshes with the external gear 4; 7 is an internal gear fixed to the other end of the joint spacer 3 and meshes with the external gear 6; 8 is a drive shaft A stopper mechanism 9 limits the amount of axial movement of the driven shaft 2, and a stopper mechanism 9 limits the amount of axial movement of the driven shaft 2. The stopper mechanism 8 includes a stopper plate 8A fixed to one end surface of the joint spacer 3, a stopper support plate 8B fixed to the end surface of the drive shaft 1, and a ring-shaped stopper 8C protruding from the stopper support plate 8B. It has a configuration in which a predetermined gap δ is formed between the stopper 8C and the stopper plate 8A. Further, the stopper mechanism 9 also has a stopper mechanism 8.
Similarly, a stopper 9A fixed to the other end face of the joint spacer 3 and a stopper support plate 9 fixed to the end face side of the driven shaft 2
B, and a ring-shaped stopper 9C protruding from the stopper support plate 9B, and a predetermined gap δ is formed between the stopper 9C and the stopper plate 9B.

In the gear type flexible joint described above, when the drive @1 moves in the axial direction, the stopper 8C of the stopper mechanism 8 comes into contact with the stopper plate 8A, and further movement is blocked, that is, the amount of movement of the drive @1 is The stopper mechanism 8 suppresses the gap to the amount δ. Furthermore, when the driven shaft 2 moves in the axial direction, the stopper 9C of the stopper mechanism 9 comes into contact with the stopper plate 9A, and further movement is prevented. It can be suppressed. In FIG. 3, reference numerals 10 and 11 indicate stoppers that suppress the relative movement between the external gear 4 and the internal gear 6 and the relative movement between the external gear 5 and the internal gear 7 to the above-mentioned clearance δ amount. .

However, in the gear type flexible joint described above, the axial force (Fl), the reaction force (F2) of the transmitted torque, and the resultant force (FO) act on the stopper of the stopper mechanism on the drive shaft 1 side, and misalignment occurs. Due to the relative slippage between the stopper and the stopper plate on the joint spacer side, the stopper strongly hits the stopper plate surface, causing galling or biting. As a result, the joint itself becomes tilted and unbalanced, causing the rotor of the electric motor that is the drive device to vibrate, making it impossible to operate the rotating machine stably.

As a countermeasure to this problem, it is conceivable to reduce the ring diameters of the ring-shaped stoppers 8C and 9C of the stopper mechanisms 8 and 9, and to arrange the stoppers close to the axis position. According to this structure, the relative slip between the stopper and the stopper plate is reduced, and the stopper receiving surface of the stopper plate is prevented from galling or biting. However, on the other hand, the force F1 of the stopper causes a large deflection of the stopper plate. turn into. Then, when the amount of deflection of the stopper plate is large, assuming that the plate thickness T of the stopper plate is the same as that of the stopper plate shown in FIG. 3, the drive shaft 1,
The amount of movement of the driven shaft 2 will exceed the regulated amount of movement. Here, when looking at the deflection ff1w of the stopper plate when a ring-shaped stopper is used, the deflection amount W can be expressed as a2 r=OET8. However, a = load radius, T = plate thickness of stopper plate, α = coefficient, E = longitudinal elastic modulus, P
= load, r = radius of stopper.

As you can see, by reducing the ring diameter of the stopper,
In addition, as the stopper is brought closer to the axis, the amount of deflection W of the stopper plate increases with the square ratio of the load radius a. Therefore, in order to reduce this deflection W, it is sufficient to increase the plate thickness T of the stopper plate, but an increase in plate thickness not only causes an increase in the weight of the entire joint, but also increases the overall dimensions. become.

[Object of the Invention] An object of the present invention is to provide a gear type flexible device that can prevent relative slippage between a stopper and a stopper receiving surface in a stopper mechanism, eliminate the need for a stopper plate, and solve problems such as deflection of the stopper plate. Our goal is to provide fittings.

[Summary of the invention]

In the present invention, a cylindrical joint spacer is interposed between the end faces of a drive shaft and a driven shaft, inner wheels are fixed to both ends of the joint spacer, and the outer periphery of the drive shaft and the driven shaft are An external gear is fixed on the outer periphery, and each internal gear and external gear are meshed with each other, while a first stopper mechanism limits the axial movement of the drive shaft, and a first stopper mechanism limits the axial movement of the driven shaft. In the gear type flexible joint, the shaft-shaped first stopper member and the second stopper member, which are connected to each other by the turnbuckle end, are connected between the end faces of the drive shaft and the driven shaft. The first stopper mechanism is configured of the first stopper member, a drive shaft and a concave stopper receiving surface formed at the center of the end surface, and the second stopper mechanism is configured of the first stopper member and the second stopper mechanism. By comprising a second stopper member and a concave stopper receiving surface formed at the center of the end face of the driven shaft, relative sliding between the stopper member and the stopper receiving surface is prevented and a stopper plate is not required. It is.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Fig. 1 is a sectional view of a gear type flexible joint according to the present invention, Fig. 2 is an enlarged view of part B in Fig. 1, and the same reference numerals as in Fig. 3 represent the same or equivalent parts. Therefore, the explanation will be omitted. In the figure, in this gear type flexible joint, a first stopper member 13 and a second stopper member 1 are connected to each other by a turnbuckle 12.
4 is driving ml and driven II+l! It is arranged on the axis between the end faces with 12. Axial displacement Il of drive shaft 1! The first stopper mechanism 15 that limits the lJ amount is composed of the first stopper member 13 and a concave stopper receptacle 16 formed at the center of the end surface of the drive shaft 1. The second stopper mechanism 17 that limits the amount of axial movement of the driven shaft 2 is composed of the second stopper member 14 and a concave stopper receiving surface 18 formed at the center of the end surface of the driven shaft 2. The tip of the stopper member and the stopper receiving surface in each stopper mechanism are formed into a spherical surface. Further, the first stopper members 13 and 14 are supported across the drive shaft 1 and the driven shaft 2 by engaging each end portion with a stopper receiving surface, respectively. Furthermore, OI of turnbuckle 12!
Due to the adjustment, the length from the tip of the first stopper member 13 to the tip of the second stopper member 14 is equal to that of both stopper receiving surfaces 1.
6. The gap δ shown in FIG. 2, which is selected to be a predetermined dimension shorter than the distance between the bottom surfaces of The gap between the tip of the second stopper member 14 and the stopper receiver 18, that is, the drive shaft 1. The allowable movement amount of the driven shaft 2 is shown.

Next, the operation of this embodiment will be explained.

The drive FII@I or the driven shaft 2 has the clearance δ shown in Fig. 2 in the axial direction.
When the first stopper mechanism 15 and the second stopper mechanism 17 are moved to a certain extent, each stopper member 13°15 comes into contact with the stopper receiving surface 16.18, respectively. In other words, the first. The second stopper member 13.15 becomes a tension rod,
Further movement is prevented. That is, rP;! ＃axis】−
The driven shaft 2 is restricted from moving more than δ between VX and VX by the stopper mechanism. Furthermore, when this stopper action is performed, the stopper member and stopper receiving surface of each stopper mechanism are arranged on the axis. Relative slippage between the two due to misalignment is prevented. This prevents the stopper receiving surface from galling or biting, and also prevents the joint itself from becoming unbalanced, ensuring stable operation of the rotating mechanism. Furthermore, since this joint does not use a stopper plate like the conventional one, the problems associated with bending of the stopper plate are eliminated.

〔Effect of the invention〕

As explained above, according to the present invention, relative slippage between the stopper member and the stopper receiver in each stopper mechanism is prevented, so that galling and digging of the stopper receiving surface can be prevented. Furthermore, since the conventional stopper plate is not required, the bending of the stopper plate and the problems associated therewith can be solved.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the gear type flexible joint of the present invention, Fig. 2 is an enlarged view of part B in Fig. 1, and Fig. 3 is a sectional view of a conventional gear type flexible joint. FIG. 4 is an enlarged view of section A in FIG. 1... Drive shaft, 2... Driven shaft, 3... Joint spacer, 4゜5... External gear, 6, 7... Internal gear, 1
2... Turnbuckle, 13... First stopper member, 14... Second stopper member, 15... First stopper mechanism, 16° 18... Stopper receiving surface, 17...
Second stopper mechanism. −°)

Claims (1)

[Claims] A cylindrical joint spacer is interposed between the end faces of the drive shaft and the driven shaft, internal gears are fixed to both ends of the joint spacer, and external gears are installed around the outer periphery of the drive shaft and the driven shaft. a first stopper mechanism that is fixedly installed and that meshes each internal gear and the external gear, while limiting the amount of axial movement of the drive shaft; and a second stopper mechanism that limits the amount of axial movement of the driven shaft. A gear type flexible joint comprising: a shaft-shaped first stopper member and a second stopper member connected to each other by a turnbuckle mechanism; , the first stopper mechanism includes the first stopper member and a concave stopper receiving surface formed at the center of the end surface of the drive shaft, and the second stopper mechanism includes the second stopper member and the driven shaft. and a concave stopper receiving surface formed at the center of the end face of the gear type flexible joint.