JPS5824646A - Rocking type fluid-tight drive unit - Google Patents

Abstract

PURPOSE:To simplify the sealing structure and as well to aim at ensuring the sealing of a rocking type fluid-tight drive unit in which power transmission is carried out through a bulkhead fluid-tightly partitioning between a drive shaft side and a driven shaft side, by transmitting drive power from a drive shaft to a driven shaft after the rotary motion of the drive shaft is converted into procession. CONSTITUTION:In case that power transmission is carried out between a drive shaft 1 and a driven shaft 2 which are laid on the same axis O-O and which are respectively located in chambers A, B that are fluid-tightly partitioned by a bulkhead 3, a spherical member 7 is journalled to the bulkhead 3 by means of a spherical member holding part 5 fitted into the inner peripheral surface of a piercing opening 4 in the bulkhead 3, and is integrally incorporated with a rocking shaft 6. Discs 8, 9 are threadedly fitted onto both ends of the rocking shaft 6, respectively, and are sealed between each of them and the bulkhead 3 with cylindrical bellows 14, 15, respectively. Meanwhile, a cylindrical socket 19 is attached to one end of drive shaft through a spherical surface bearing 20, and is secured to the disc 8. Further, a shifter 31 is slidably attached to one end of the driven shaft 2, and a cone ring 37 attached to the shifter 31 through a supporting shaft 32 is made into contact with the conical surface 29 of the disc 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oscillating transmission l' arrangement that transmits the rotation of a drive shaft to a driven shaft via a oscillating shaft that does not rotate itself. The present invention relates to a fluid-tight transmission device that can fluid-tightly partition a shaft side and a driven shaft side.

In the case of fluid equipment that handles special fluids, the drive shaft side and driven shaft side must be completely connected to prevent foreign matter from getting into the fluid or to prevent component parts from being corroded by the fluid. It is required to be able to transmit transmission while sealing to the outside. Also, if the drive shaft side is immersed in lubricating oil, for example, the drive shaft side and the driven shaft side should be oil-tightly partitioned to prevent the lubricant oil from leaking to the driven shaft side. Oh (I need it.

In such cases, conventionally, an opening is provided in the partition wall that partitions the drive shaft side and the driven shaft side, and the transmission rotation shaft is supported by the opening, and a shaft such as an oil seal is installed between the opening and the rotation shaft. By providing the sealing member, transmission and fluid sealing between the drive shaft side and the driven shaft side is achieved.

However, since such a shaft seal member is provided between the rotating part and the stationary part, it is difficult to achieve a complete seal, and it is also susceptible to damage due to wear etc. Many of them also had problems such as not being able to withstand long-term use.

The present invention aims to provide a transmission device that is used where it is necessary to completely seal between the drive shaft side and the driven shaft side. The rotation of the drive shaft is transmitted to the driven shaft by a non-contact transmission member, which enables complete sealing between the transmission member and the bulkhead, and can withstand repeated loads, resulting in a long life. , it is an object of the present invention to provide a transmission device that can be sealed by a diaphragm-like sealing member such as a bellows or a diaphragm.

Hereinafter, the present invention will be described in detail based on the drawings.
The figure shows a first embodiment of the present invention, in which a driving shaft 1 and a driven shaft 2 are arranged at a distance on the same axis 0-0. A partition wall 3 is provided between the drive shaft 1 and the driven shaft 2 to fluid-tightly partition a chamber A on the drive shaft 1 side and a chamber B on the driven shaft 2 side. 0- OK
An opening 4 is formed along the line. A spherical bearing 5, which has a spherical surface centered at a point P on the axis 0-θ, is attached to the inner circumferential wall of the opening 4.

A swing shaft 6 passes through the opening 4, and a spherical portion 1 provided at the center of the swing shaft 6 is supported by a spherical bearing 5. Therefore, the swing shaft 6 can swing vertically and horizontally about the point P. Circles &8 and 9 are fixed to both ends of the swing shaft 60 by screws or the like. Gaskets 10, 10 are provided between the swing shaft 6 and the discs 8, 9 to prevent fluid from leaking between them. Further, washers 12 and 13 are attached to the back surface of each disc 8, 9, that is, the surface facing the partition wall 3, and around the opening 40 of the partition wall 3 with bolts 11, etc.
A diaphragm-like sealing member such as a cylindrical bellows 14 and 15 is provided between the chambers A and B and the periphery of the opening 4 in a fluid-tight manner. Furthermore, washer 1
Gaskets 16, 16 are also provided between 2.13 and the partition wall 3.

One washer 12 is provided with a protrusion 17 that protrudes toward the center, and by engaging this protrusion 17 with a groove 18 provided in the swing shaft 6, the swing shaft 6 becomes It is prevented from rotating about its longitudinal axis.

That is, these protrusions 17 and grooves 18 constitute a rotation stopper for the swing shaft 60. This protrusion 17 is
It can also be provided directly on the partition wall 3.

A cylindrical socket portion 19 is fixed to the surface of the disk 80 facing the drive shaft 1, and a spherical bearing 20 is attached to the inner peripheral wall of the socket portion 19. On the other hand, the tip of the drive shaft 1 is cut out by a drive plane 21 parallel to the axis 0-0, as shown in FIG. An eccentric ring 22 is arranged. The outer peripheral surface of this eccentric ring 22 is formed as a spherical surface, and is rotatably supported by a spherical bearing 20. A wedge member 24 is interposed between the drive plane 21 of the drive shaft 1 and the inner peripheral surface 23 of the eccentric ring 22. This wedge member 24 includes a wedge roller 26 having a driven plane 25 that comes into contact with the driving plane, and is fitted onto the outer periphery of this wedge roller 26, has the same curvature as the inner circumferential surface 23 of the eccentric ring 22, and has the same curvature as the inner circumferential surface 23 of the eccentric ring 22. The clutch piece 28 has a circular arc surface 27 that is in close contact with the clutch piece 28 over the circumference. The circular arc surface 27 on the outer periphery of this clutch piece 28 protrudes from the outer periphery of the drive shaft 1, and the center A of the eccentric ring 22 is a certain amount E with respect to the central axis 1g O-o of the drive shaft 1.
It is designed to make it eccentric.

Further, the center of the wedge roller 26 is disposed at a position offset from the center A of the eccentric ring 22, thereby reducing slippage between the clutch piece 28 and the eccentric ring 22 when the drive shaft rotates 10 times, and preventing wear as much as possible. It has become so.

Further, on the outer circumference of the surface of the disk 90 facing the driven shaft 2,
A conical surface 29 is formed. A shifter 31 having a screw hole 3o perpendicular to the axis 0-0 is slidably attached to the tip of the driven shaft 2, and a screw portion 32 is formed in the screw hole 30. A support shaft 33 is screwed. A slit 34 is provided at the head of the support shaft 33.
is formed, and the shifter 31 is fixed by screwing the support shaft 33 into the slit 34 and pressing its tip against the bottom of the keyway 35 of the driven shaft 2. By loosening , the shifter 31 can be slid in the direction of the axis 0-0. Therefore, the support shaft 33 is perpendicular to the driven shaft 2 and rotates together with it about the axis 0-00. A ball bearing 36 is attached to the tip of the support shaft 33, and a conical ring 37 is fitted around the outer periphery of the pole bearing 36. A conical surface 38 is formed on the outer periphery of the conical ring 37, and this conical surface 38 is brought into contact with the conical surface 29 of the disk 90.

Next, to explain the operation of the above embodiment, the eccentric ring 22 is moved by a certain amount E from the axis O-0 by the wedge member 24.
Only eccentric. Therefore, the spherical bearing 2° centered on the center A of the eccentric ring 22 and the socket portion 19 supporting it are also deviated from the axis 0-0, and the swing axis 6 is tilted around the point P.

The disk 9 on the driven shaft 2 side is also tilted, and the outer circumferential portion of the disk 9 approaches the partition wall 3 closest to the center A of the eccentric ring 22 with respect to the axis 0-0. Therefore, at the position closest to this partition wall 3, the conical surface 38 of the conical ring 37
The shifter 31 is slid and fixed so as to come into contact with the conical surface 29 of the shifter 31.

In this state, when the drive shaft 1 is rotated counterclockwise in FIG. Reportedly. At this time, the eccentric ring 22
The eccentric force transmitted to the spherical bearing 20 is transmitted as it is to the spherical bearing 20, but the rotational force is absorbed between the eccentric ring 22 and the spherical bearing 20 and is not transmitted to the spherical bearing 20. the result,
The spherical bearing 20 has a constant eccentricity E around the axis 0-00.
It will revolve with . Since the socket portion 19, the disc 9, and the swing shaft 6, which are integrated with the spherical bearing 20, are supported by the spherical bearing 5 centered at the point P, the swing shaft 6 is moved to the point P by this eccentric movement. Makes a oscillating motion, or a conical motion, around the . At this time, almost no rotational force is transmitted to the swing shaft 6, and the protrusion 1T
Since a rotation stopper consisting of a groove 18, etc. is provided,
The swing shaft 6 only performs a swing motion and does not rotate around its own axis.

The tilting direction of the disc 9 on the driven shaft 2 side changes due to the slight rocking motion of the rocking shaft 6. That is, the eccentric ring 22
As the center A moves around the axis 0-0, the position on the outer periphery of the disk 9 closest to the partition wall 3 moves in the same direction at the same speed with a phase difference of 180 degrees. Since the conical ring 37 is set so as to come into contact with the outer periphery of the disc 9 at the position closest to the partition wall 3, the conical ring 37 overflows to the outer periphery of the disc 9 as the inclination direction of the disc 9 changes. and move.

Therefore, the driven shaft 2 is aligned with the axis 0-0 of the eccentric ring 22.
It receives a rotational force around the axis 0-0 in the same direction and at the same speed as the revolution around the axis. In this way, the rotational movement of the drive shaft 1 is transmitted to the driven shaft 2.

Since the swing shaft 6 only swings around the point P and does not rotate, the movement of the disks 8 and 9 fixed to both ends of the shaft is accompanied by bellows 14 and 15 that expand and contract in the axial direction. It can be followed by

Therefore, the seal between chamber A and chamber B can be perfected. Also, since no force is applied to the bellows 14.15 in the circumferential direction, the bellows 14.15
can be made of metal and can prevent corrosion and deterioration. Furthermore, by reducing the eccentricity E of the eccentric ring 22, the swing angle around the swing axis 60 point P can be reduced, thereby allowing the bellows 14, 15 to expand and contract mostly along the axial direction. Therefore, its durability can be further improved.

Further, since the swing shaft 6 does not rotate, the spherical bearing 5 supporting the swing shaft 6 does not require special lubrication. Therefore, this bearing 5 can be made into an oil-free bearing,
It can also be made of metal if necessary.

FIG. 3 shows another embodiment of the present invention, in which a driving shaft 1 and a driven shaft 2 are arranged in the same shaft assembly with a space between them on both sides of a partition wall 30.
- located on o. Similar to the first embodiment, an opening 4 is formed in this partition 3, and on the inner peripheral wall of this opening 4,
A spherical bearing 5 centered at a point P on the axis O-0 is attached, and the spherical portion 7 of the swing shaft 6 is rotated by this bearing 5.
is swingably supported.

Cylindrical sockets 39 and 40 are fixed to both ends of the swing shaft 60, and spherical bearings 41 and 42 are respectively attached to the inner peripheral walls of these sockets 39 and 400. A protrusion 43 that protrudes toward the partition wall 3 is provided on the back surface of the socket 39, and by engaging this protrusion 43 with a groove 44 provided in the partition wall 3, rotation of the swing shaft 60 is prevented. It has become. That is, the protrusion 43 and the groove 44 prevent the swing shaft 6 from rotating. Further, a disk-shaped diaphragm 47 having a curved portion fixed by washers 45 and 46 is provided between the back surface of the socket 40 and the partition wall 3, and has a chamber A on the drive shaft 1 side and a chamber A on the driven shaft 2 side. and chamber B in a fluid-tight manner.

On the other hand, the axis 0-
Eccentric shaft 48.4 that is eccentric by an amount of eccentricity E that is not less than 0
9 are attached to each.

These eccentric axes 48, 49 are arranged so as to have a phase of 180 degrees with respect to each other, that is, symmetrically with respect to point PK. Eccentric rings 50, 51 are fitted to the tip of each eccentric shaft 48, 49, respectively.

The outer peripheral surfaces of these eccentric rings 50, 51 are both formed as spherical surfaces, and are rotatably supported by spherical bearings 41, 42 of sockets 39, 40, respectively.

When the drive shaft 1 is rotated in this state, the eccentric ring 50 revolves around the axis 0-0 with an eccentric amount E. At this time, as in the first embodiment, the eccentric force is directly transmitted to the spherical bearing 41, but the rotational force is absorbed between the eccentric ring 50 and the spherical bearing 41. Since the rotation of the swing shaft 6 is prevented by a rotation stopper, the swing shaft 6 does not rotate, but performs only a small swing motion around the point P. This swing movement of the swing shaft 6 causes the socket 4 integrated with it to
0 and the spherical bearing 42 move eccentrically around the axis 0-00, and the eccentric ring 51 supported by the spherical bearing 42 moves eccentrically around the axis 0-00.
It revolves around -0 with an eccentric amount E. This revolution of the eccentric ring 51 is transmitted to the eccentric shaft 49, and the driven shaft 2 is rotated.

Due to the swinging of the swinging shaft 6, the socket 40 with the diaphragm 47 fixed to the back side moves in a plane perpendicular to the axis O-O, but since the eccentricity E of the eccentric shafts 48 and 49 is small, the swinging Since the swing angle of the shaft 6 is also small, the amount of displacement of its movement is small. Therefore, the diaphragm 47 can sufficiently follow the movement of the socket 40 by deforming its curved portion. By using such a diaphragm 47, fluid tightness between chamber A and chamber B can be maintained reliably.

As described above, according to the present invention, the rotational force is transmitted between the drive shaft and the driven shaft through the swing shaft that only swings but does not rotate. The driven shaft side can be partitioned off by a diaphragm-like sealing member such as a bellows or a diaphragm, and a fluid-tight transmission device with a fluid-tight seal between them can be obtained. Furthermore, since the swing shaft does not rotate and no circumferential twisting force is applied to the bellows or diaphragm, a fluid-tight transmission device with a long life can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a first embodiment of the transmission device according to the present invention, FIG. 2 is a cross-sectional view of the main part taken along the line ■-■ in FIG. 1, and FIG. 3 is a cross-sectional view showing another embodiment. FIG. E... Eccentricity, 0-0... Axis line, P... Center point,
1... Drive shaft, 2... Driven shaft, 3... Bulkhead, 4...
... Opening, 5 ... Spherical bearing, 6 ... Swing axis, 8, 9
... Disc, 14°15... Beads, 17...
Projection, 18...groove...2°...spherical bearing, 22
... Eccentric ring, 37 ... Conical ring, 41.42
... Spherical bearing, 43 ... Protrusion, 44 ... Groove, 4
7...Diaphragm, 48.49...Eccentric shaft, so
, si... Eccentric ring patent applicant Fuji --

Claims (1)

[Scope of Claims] (11) In a transmission device for transmitting rotational force between a driving shaft and a driven shaft that are arranged on the same axis at intervals on both sides of a partition; It is supported by a spherical bearing section such that it can swing freely about a point on the axis, and rotation about its own longitudinal axis is prevented by a rotation stopper provided between the partition wall and the partition wall. a swinging shaft; a mechanism provided between the swinging shaft and the drive shaft and converting the rotational motion of the drive shaft into a slight swinging motion of the swinging shaft; the swinging shaft and the driven shaft; a mechanism provided between the partition wall and the swing shaft to convert the slight swing motion of the swing shaft into rotational motion of the driven shaft; and a mechanism provided between the partition and the swing shaft to follow the swing of the swing shaft. a diaphragm-like seal member that is deformed to fluid-tightly partition a drive shaft side and a driven shaft side;
An oscillating fluid-tight transmission device consisting of: (2) A mechanism for converting the rotational motion of the drive shaft into a rocking motion of the rocking shaft; is provided at the end of the drive shaft, and has a spherical outer peripheral surface that moves eccentrically as the drive shaft rotates. The transmission device according to claim 1, comprising: an eccentric ring; and a spherical bearing provided at an end of the swing shaft and rotatably supporting the eccentric ring.