JP2001012201A - Rotary cylinder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary cylinder device capable of highly efficient rotation without requiring a very highly accurate portion where a piston and a cylinder abut on each other. SOLUTION: This rotary cylinder device is provided with a circular hollow section 41, a cylinder member 4 which has cylinder chambers 42a, 42b, 42c, 42d, 42e and 42f which are connected to the hollow section 41 and extend to the outer periphery of the of the hollow section 41, a rotary piston member 5 which has pistons 53a, 53b and 53c which rotate around a position deviated from the shaft center (o) of the cylinder member 4 and go in and out the cylinder chambers 42a through 42f and can relatively rotate in relation to the cylinder member 4, and a support member which includes the cylinder member 4 and the rotary piston member 5 therein and has a suction port 22a and discharge port 22b which are communicated with the cylinder chambers 42a through 42f. In addition, magnetic fluid S is arranged in the gap formed between the pistons 53a through 53c which go in the cylinder chambers 42a through 42f and the cylinder chambers 42a through 42f to bury the gap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder device that can be used as a fluid transport device, a fluid motor, and the like, and more particularly to a rotary cylinder device in which a piston moves into and out of a cylinder chamber by rotational movement.

[0002]

2. Description of the Related Art Conventionally, a rotary pump using a special cam shape has been known.
Parts processing was difficult, causing cost increases.
In order to solve such a drawback, the applicant has previously developed a rotary cylinder device having a structure that does not require a gear part in a suction / discharge portion (Japanese Patent Application Laid-Open No. 56-11850).
No. 1, JP-A-57-87184 and JP-A-5-87184
8-92486).

As shown in FIGS. 7 and 8, a rotary cylinder device disclosed in Japanese Patent Application Laid-Open No. 56-118501 includes a circular cylinder member 102 fixed in a box-shaped casing 101 by press fitting or the like. And a support member 104 that rotates within a circular cavity 103 formed at the center of the cylinder member 102. Three pairs (six) of cylinder chambers 105a, 105b, and 10 are radially provided on the inner wall 103a of the cavity 103 of the cylinder member 102.
5c, 105d, 105e, and 105f are formed. These cylinders 105a to 105f are connected to the outside of the casing 101 with the rotation of the support member 104, and are connected to the suction port 10 for taking in outside air into the cylinder device.
6 and a discharge port 107 for discharging the taken-in outside air.

The support member 104 is a disk-shaped member fixed to one end of a shaft 108 rotatably supported in a hole 101a formed in the casing 101, and has a crescent-shaped surface on the surface opposite to the shaft 108. Is mounted. The valve seat 109 is disposed so as to closely adhere to about a half circumference of the inner wall portion 103a, and is for improving the airtightness in the hollow portion 103. The support member 104 has a hole 10 for communicating with the discharge port 107.
4a.

The eccentric position of the support member 104 is
10 is fixed, and a rotating piston member 11
1 is rotatably supported. Both ends of the shaft 110 are fixed to a support member 104 and a disk-shaped auxiliary plate member 113 fixed at a position facing the support member 104 with the valve seat 109 interposed therebetween. The auxiliary plate member 113 has a suction port 106
A hole 113a is provided for communicating with the hole. The auxiliary plate member 113 rotates integrally with the support member 104. The rotating piston member 111 has a rotation center 112a.
And pistons 111a, 111b, and 111c extending radially from the rotation center 112a in three directions. The rotating piston member 111 is moved along the axis o1 of the cylinder member 102 with the rotation of the supporting member 104.
Orbit around.

As the support member 104 rotates, the pistons 111a, 111b, 111c reciprocate between the paired cylinder chambers 105a to 105f. FIGS. 8A to 8D sequentially show a part of a series of this operation. Support member 1
Reference numeral 04 rotates as a whole in the counterclockwise direction (the direction indicated by arrow B ') in FIG. On the other hand, the rotating piston member 111
While the fulcrum rotates in the direction of arrow B ', it itself rotates clockwise (direction of arrow A'). By this operation, outside air is taken into the cylinder chambers 105a to 105f from the suction port 106, and is discharged from the discharge port 107 to the outside.

[0007] Japanese Utility Model Application Laid-Open No. 57-87184 and Japanese Utility Model Application
The rotary cylinder device disclosed in Japanese Patent Application Laid-Open No. 8-92486 has basically the same configuration as the rotary cylinder device described in Japanese Patent Application Laid-Open No. 56-118501, but has a slightly different structure. I have. The different points are that the cylinder member 102 is rotated by the rotation of the rotating piston member 111, the valve seat 109 is fixed to the case and does not rotate, and the rotation fulcrum of the rotating piston member 111 is not rotated. .

[0008]

As described above, the rotary cylinder device described in Japanese Patent Application Laid-Open No. 56-118501 is a special cam-shaped component that requires a high level of know-how in order to enhance the engagement accuracy. Etc. are not used. That is, JP-A-56-118501
In the figure, the pumping operation is performed by the relative rotation of the support member 104 with respect to the cylinder member 102 fixed in the casing 101. However,
A rotary piston member 111 rotatably provided at an eccentric position of the support member 104 and each of the cylinder chambers 105a to 105f
It is still undeniable that the fluid may leak from the contact surface. Therefore, in order to increase the rotational efficiency, it is necessary to increase the precision of the parts at the parts where the parts contact each other, which causes a problem that the cost is increased.

In Japanese Patent Application Laid-Open No. 56-118501, since the supporting member 104 for supporting the rotating piston member 111 is supported on one side, rotational imbalance is likely to occur, resulting in poor pump efficiency and noise. Is more likely to occur. Further, since the suction port 106 and the discharge port 107 are arranged on one side, the pressure balance against the rotating piston member 111 is poor, which is disadvantageous in terms of pump efficiency and noise.

The rotary cylinder device described in Japanese Utility Model Laid-Open Publication No. 57-87184, in which the cylinder member rotates, has the above-mentioned problems. In addition, the rotating cylinder member has a cantilever support structure. Imbalance occurs in the rotation of the cylinder member, which is further disadvantageous in terms of pump efficiency and noise.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and enables high-efficiency rotation without making the accuracy of the contact portion between the piston and the cylinder so high. It is an object to provide a rotary cylinder device. Another object of the present invention is to provide a rotary cylinder device having a stable rotation balance, high pump efficiency and low noise generation.

[0012]

In order to achieve the above object, a rotary cylinder device according to the present invention comprises: a cylinder member having a circular hollow portion, a cylinder chamber connected to the hollow portion and extending to the outer periphery; A rotary piston member having a piston that rotates about a position eccentric from the axis of the member and rotates into and out of the cylinder chamber and rotatable relative to the cylinder member, and having a cylinder member and a rotary piston member therein, A support member having a suction port and a discharge port connected to the cylinder chamber is provided, and a magnetic fluid is disposed in a gap formed between the piston entering the cylinder chamber and the cylinder chamber to fill the gap.

For this reason, in the present device, even when the accuracy of parts at the opposed portion between the piston and the cylinder chamber is low, the magnetic fluid disposed in the gap performs the sealing effect of the gap, and the gap from the gap portion Efficiency loss due to the outflow of fluid.

Further, another invention is provided with a holding means for holding a magnetic fluid near a contact portion between a piston and a cylinder chamber in addition to the rotary cylinder device described above. For this reason, the magnetic fluid is held in the gap, and it is possible to prevent the sealing effect from being reduced due to the outflow of the magnetic fluid.

According to another aspect of the present invention, in addition to the above-described rotary cylinder device, a magnet is used as the holding means, and a plurality of magnets are arranged on a piston so as to overlap with each other in the axial direction, and adjacent poles are different. It is arranged to be a pole. For this reason, the magnetic fluid is more reliably held on the outer peripheral portion of the piston by forming multiple magnetic paths in the axial direction of the piston, and leakage of the fluid at the contact portion between the piston and the cylinder member is further prevented. can do.

According to another aspect of the present invention, there is provided a rotary cylinder device comprising: a cylindrical member having a circular hollow portion, a cylinder chamber connected to the hollow portion and extending to the outer periphery, and a position eccentric from the axis of the cylinder member. A rotary piston member having a piston that rotates as a center and moves in and out of the cylinder chamber, and is rotatable relative to the cylinder member;
Having a cylinder member and a rotary piston member inside,
A support member having a suction port and a discharge port connected to the cylinder chamber is provided, and a bearing member slidably receiving the outer peripheral surface of the cylinder member is disposed on a portion of the support member facing the outer peripheral surface of the cylinder member. .

As a result, the rotational balance of the cylinder member in the radial direction is improved, and "swing" during rotation is minimized, so that the rotation operation is stabilized.

According to another aspect of the present invention, there is provided a rotary cylinder device comprising: a circular hollow portion; a cylinder member connected to the hollow portion and having a cylinder chamber extending to the outer periphery; A rotary piston member having a piston that rotates as a center and moves in and out of the cylinder chamber, and is rotatable relative to the cylinder member;
Having a cylinder member and a rotary piston member inside,
A support member having a suction port and a discharge port connected to the cylinder chamber is provided, and a discharge port and a suction port communicating with the cylinder chamber are formed on each of opposing surfaces of the support member with both axial end faces of the cylinder member. I have.

As a result, the pressure balance on both sides of the cylinder member in the thrust direction is improved, and as a result, the "swing" during rotation is minimized, so that the rotation operation is stabilized.

According to another aspect of the present invention, there is provided a rotary cylinder device comprising: a circular hollow portion; a cylinder member connected to the hollow portion and having a cylinder chamber extending to the outer periphery; A rotary piston member having a piston that rotates as a center and moves in and out of the cylinder chamber, and is rotatable relative to the cylinder member;
Having a cylinder member and a rotary piston member inside,
The rotary shaft includes a support member having a suction port and a discharge port connected to the cylinder chamber, and a rotation shaft inserted and fixed to the rotation center of the rotary piston member.
It is bearing at the position of the place.

Therefore, the rotation of the rotary piston member is stabilized by the double-sided bearing, and the rotation operation of the cylinder member accompanying the rotation is also stabilized. As a result, the "run-out" due to the rotation of the rotary piston member and the cylinder member is minimized, and the rotation is stabilized.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary cylinder device according to an embodiment of the present invention will be described with reference to FIGS. Note that, in this embodiment, a rotary pump device that continuously sends gas in a certain direction will be described, but a medium to be sent may be any fluid including a liquid instead of a gas. Further, the present invention is not limited to a pump device, but is also suitable for various devices configured by utilizing the rotation operation of a cylinder member, for example, an air compressor and an air motor.

As shown in FIGS. 1 to 3, a rotary cylinder device 1 includes a casing 2 as a support member for supporting each rotating member of the device 1, and a ring-shaped bearing member accommodated in the casing 2. 3, a cylinder member 4 rotatably disposed on the inner periphery of the bearing member 3, a rotary piston member 5 rotatably disposed at a position eccentric from an axis o of the cylinder member 4, a bearing member 3, and a cylinder. A cover member 6 that is fixed to the casing 2 with the member 4 and the rotary piston member 5 disposed inside and covers each member to become a part of the casing 2.

The casing 2 has a rectangular outer shape, and has a shape in which a circular space 21 with a bottom is penetrated on one surface. Inside the space 21, that is, at a position facing the outer peripheral surface of the cylinder member 4, the outer peripheral surface of the cylinder member 4 is received, and the cylinder member 4 is moved to the space 21.
Ring-shaped bearing member 3 for rotatably supporting the inside thereof
Is fitted.

The circular space 21 of the casing 2
Outside the space 21 of the cut-out surface, the lid member 6
Are provided with holes 2a, 2b, 2c, 2d for inserting screws 7a, 7b, 7c, 7d for fixing. Further, holes 2e and 2f for inserting positioning pins 9a and 9b for positioning the lid member 6 with respect to the casing 2 are provided on this surface.

A shaft 51 fixed to the center of rotation of the rotary piston member 5 is provided at the bottom 21a of the circular space 21.
Is provided with an insertion hole 21b. A bearing device 8a that supports one side of the shaft 51 is fitted into the insertion hole 21b.

Further, at the bottom 21a of the space 21,
A crescent-shaped valve seat 21c is attached. When the cylinder member 4 is disposed in the space 21, the outer peripheral portion of the valve seat 21 c extends along approximately half the circumference of the inner wall portion 41 a of the circular hollow portion 41 formed in the center of the cylinder member 4. I have. Further, an arc portion inside the valve seat 21c slides when each of the pistons 53a, 53b, 53c of the rotary piston member 5 rotating in the casing 2 passes through the hollow portion 41 of the cylinder member 4. I have.

A part of the space 21 near the outer peripheral edge of the bottom portion 21a has a slit groove 22 having an arc shape of about 80 degrees.
a, 22b are formed. The slit groove 22a communicates with a suction hole 24a communicating with the bottom surface 23 of the casing 2. The bottom surface 2 of the casing 2 of the intake hole 24a
The intake pipe 11a is connected to the third side. With such a configuration, the slit groove 22a communicates with the outside of the casing 2 and forms a part of a suction port that takes in outside air into the casing 2.

The slit groove 22b communicates with an exhaust hole 24b communicating with the casing 23, similarly to the slit groove 22a. The bottom surface 2 of the casing 2 of the exhaust hole 24b
An exhaust pipe 12a is connected to the third side. With such a configuration, the slit groove 22b communicates with the outside of the casing 2 and forms a part of a discharge port for discharging the taken-in fluid to the outside of the casing 2.

In the ring-shaped bearing member 3, a plurality of long holes, each of which is parallel to the axial direction of the cylinder member 4, and in this embodiment, 24 long holes 31 are formed at regular intervals every 15 degrees. . A needle 32 is rotatably fitted into each of the long holes 31. These needles 32
Are arranged so that the outer peripheral surface slightly protrudes inward and outward of the bearing member 3 from the elongated hole 31, and the outer peripheral surface of the cylinder member 4 and the inner peripheral surface of the casing 2 come into sliding contact with the protruding portion. ing. That is, the 24 needles 32 support the rotation of the cylinder member 4 while rotating.

As described above, in the present embodiment, the outer peripheral surface of the cylinder member 4 is arranged so as to surround the periphery.
Since the four needles 32 are used to support the cylinder member 4, it is possible to prevent the radial movement of the cylinder member 4 and to stabilize the rotation operation. This makes it possible to provide a device with high operation accuracy. Note that the number of the needles 32 and the long holes 31 is not limited to 24, and may be another numerical value, or may not be arranged at equal intervals. Also,
The shaft member may be inserted and fixed to the rotation center of the cylinder member 4, and the shaft member 3 may be omitted by receiving the shaft with one end or both ends.

The cylinder member 4 has a circular hollow portion 4 in the center.
1 so as to rotate in the space 21 of the casing 2 around the axis which is the center of the hollow portion 41, that is, the axis o of the cylinder member 4.

The inner wall portion 41 of the hollow portion 41 of the cylinder member 4
a includes six cylinder chambers 42a, 42b, 4 radially.
2c, 42d, 42e, and 42f are provided. Further, each of the cylinder chambers 42 a to 42 adjacent to the inner wall portion 41 a is
f, T-shaped grooves 45a, 45b, 45c, 45d, 45e, 4
5f is provided (the T-shaped groove facing the bottom 21a of the casing 2 is not shown). This T-shaped groove 45a ~
45f is for slightly increasing the volume of the internal space of the cylinder member 4, that is, the effective volume into which the fluid can flow, and increasing the chance of suction and discharge. With this configuration, in the present embodiment, the amount of inflowing fluid increases, and suction and discharge are performed efficiently, so that pump efficiency is improved.

Each of the T-shaped grooves 45a to 45f has an arc-shaped arc portion 47a formed at the outer end in the radial direction at about 20 degrees in the circumferential direction, and a radiating portion connecting the arc portion 47a and the cavity portion 41. 48a. When the cylinder member 4 is rotated, the arc-shaped portions 47a of the T-shaped grooves 45a to 45f on the side facing the bottom 21a of the casing 2 are formed in the slit grooves 22 formed in the bottom 21a of the casing 2.
a, 22b.

On the other hand, the T-shaped groove 45 on the side facing the lid member 6
When the cylinder member 4 is rotated, the circular arc portions 47a of 45a to 45f are formed by the slit grooves 62a, 6a formed in the lid member 6.
It is provided at a position where it can move while opposing to 2b.

Each of the cylinder chambers 42a to 42f has an inner wall 4
It is formed straight so that the width is the same from the 1a side to a depth of about 70%, and has a semicircular shape from the position of about 70% to the deepest part.
It has a letter-shaped notch. These cylinder chambers 42
The dimensions of the inner diameters of a to 42f are substantially the same as the outer dimensions of the pistons 53a to 53c of the rotary piston member 5 described later, and the pistons 53a to 53c move in and out of the cylinder chambers 42a to 42f so that there is no gap. I can do it.

At the axially opposite end portions of the deepest portion of the cylinder member 4, rectangular recesses 43a and 43
b, 43c, 43d, 43e, 43f are provided (illustration of a concave portion facing the bottom 21a of the casing 2 is omitted). When placed in the casing 2, the casing 2
When the cylinder member 4 rotates, the recesses 43a to 43f on the side facing the bottom 21a
The slit grooves 22a and 22b formed at the position which can be moved while facing. Further, when the cylinder member 4 rotates, the concave portions 43a to 43f on the side facing the lid member 6 have slit grooves 6 formed in the lid member 6 described later.
It is provided at a position where it can move while facing 2a and 62b.

Cylinder chambers 42a and 42d, cylinder chamber 4
2b and 42e and the cylinder chambers 42c and 42f are a pair of members arranged to face the position of 180 degrees with respect to the rotary piston member 5 via the axis o of the cavity 41, respectively. That is, when the rotary piston member 5 rotates, the cylinder chambers 42a and 42d
The piston 53a of the rotary piston member 5 alternately
The pistons 53b alternately enter and exit the cylinder chambers 42b and 42e, and further enter and exit the cylinder chambers 42c and 42e.
The pistons 53c come and go alternately at f.

Each cylinder chamber 42a-4 of the cylinder member 4
The magnetic fluid S is attached to each part where the fluid to be sucked and discharged contacts, such as the inner peripheral surface of 2f. This magnetic fluid S is such that each piston 53a, 53b, 53c is
When entering and exiting the interior of each of the pistons 53a, 53
Each space formed by b, 53c and each of the cylinder chambers 42a to 42f is partitioned and hermetically sealed to improve pump efficiency. That is, the magnetic fluid S is applied to each of the pistons 53a to 53c and each of the cylinder chambers 4.
It is held in a slight gap with 2a to 42f to prevent leakage of fluid from this gap.

As will be described later, the magnetic fluid S is held on the peripheral surfaces of the pistons 53a, 53b, 53c by magnets 56a, 56b, 56c embedded in the pistons 53a, 53b, 53c (see FIG. 4). At the same time, it is adhered and held on the surface of the magnetic metal material, specifically, on the surface of the portion inside the cylinder member 4. In addition,
The magnetic fluid S other than the magnetic fluid S held by the rotary piston member 5 is not strongly held at a predetermined position in the cylinder chambers 42a to 42f.
The attachment position easily changes by the movement of 3a to 53c.

In this embodiment, when the rotary piston member 5 rotates in the direction indicated by the arrow A in FIG. 3, the cylinder member 4 rotates in the direction indicated by the arrow B about the axis o with the rotation. Has become. However, the relationship between the cylinder member 4 and the rotary piston member 5 is
The relationship may be such that they rotate relative to each other, and the configuration may be such that the cylinder member 4 is fixed and only the rotary piston member 5 rotates as in the above-described related art. When such a configuration is adopted, the rotary piston member 5 revolves around the axis o along the inner wall portion 41a of the cylinder member 4 while rotating, similarly to the related art.

In addition to the shaft 51, the rotary piston member 5 is connected to a rotation center 52 and arms 54a to 54c extending radially in three directions at equal intervals from the rotation center 52. Pistons 53a, 53b, 53
c, and the shaft 51 is inserted and fixed to the rotation center portion 52. That is, three cylindrical pistons 53
a, 53b, 53c are the cylinder chambers 42a to 42
This is half the number of f. When the rotary piston member 5 rotates in the direction indicated by the arrow A by driving a motor or the like and the cylinder member 4 rotates in the direction indicated by the arrow B, the piston 5
Reference numeral 3a designates the cylinder chambers 42a and 42d, piston 53b enters and exits the cylinder chambers 42b and 42e, and piston 53c enters and exits the cylinder chambers 42c and 42f.

Each of the pistons 53a to 53c passes through the cavity 41 of the cylinder member 4 when moving from one cylinder chamber to the other cylinder chamber. At this time, each of the pistons 53a to 53c moves while slidingly contacting an arc-shaped portion inside the crescent-shaped valve seat 21c erected on the bottom 21a of the casing 2. Thereby, the cylinder member 4
The airtightness inside the hollow portion 41 is increased.

One end of the shaft 51 inserted and fixed to the rotation center portion 52 is rotatably inserted into the insertion hole 21b in which the bearing device 8a is fitted as described above. The other end of the shaft 51 is rotatably inserted into an insertion hole 61b of the lid member 6 in which the bearing device 8b is fitted, as described later.

Therefore, the shaft 51 serving as the center of rotation of the rotary piston member 5 is connected to the bearing device 8 a in the insertion hole 21 b provided in the bottom 21 a of the casing 2 and the cover member 6.
Are supported on both sides of the rotary piston member 5 by both of the bearing members 8b in the insertion holes 61b provided on the side. Therefore, the rotary piston member 5
It is possible to rotate smoothly without generating rotational runout in the casing 2.

When the rotary piston member 5 thus formed rotates in the direction of arrow A about the shaft 51 by the driving force of a motor or the like, each of the pistons 53a, 53b,
53c is a pair of cylinder chambers 42a to 42a to
Enters and exits smoothly between 42f. This ingress and egress is visually recognized as reciprocating. By the rotation of the rotary piston member 5 in the direction indicated by the arrow A,
The pistons 53a to 53c reciprocate while pushing the cylinder chambers 42a to 42f of the cylinder member 4 in the rotation direction. Therefore, the cylinder member 4 receives the force,
It rotates in the direction of arrow B in the space 21 of the casing 2.

As shown in FIG. 4, each of the pistons 53a, 53b, 53c has a cylindrical portion 55a-55, respectively.
c, and columnar magnets 56a to 56c arranged in the cylindrical portions 55a to 55c. The magnets 56a to 56c are installed near the contact portions of the pistons 53a to 53c with the cylinder chambers 42a to 42f, in this embodiment, at the centers of the pistons 53a to 53c as described above. With this configuration, the magnets 56a to 56c draw the magnetic fluid S toward the pistons 53a, 53b, 53c and hold the magnetic fluid S on the outer periphery thereof, thereby filling the magnetic fluid S into the gap with the cylinder member 4, This is a holding means for preventing leakage of the fluid from the gap.

The magnets 56a, 56b, and 56c are each composed of a plurality of magnets, three magnets in this embodiment, so that the poles adjacent to the rotary piston member 5 in the axial direction are different poles, that is, the N poles The S poles are arranged so as to be alternated. Therefore, the magnetic paths S1 are formed in the axial direction of the rotary piston member 5 in multiple layers, and are firmly held on the outer periphery of each of the pistons 53a, 53b, 53c.
Is more reliably filled with the magnetic fluid S. As a result, leakage of the fluid from the gap can be reliably prevented.

The lid member 6 is formed of a rectangular flat plate member having a predetermined thickness. At the four corners of the lid member 6,
Screws 7a to 7 for fixing the lid member 6 to the casing 2
Holes 63a to 63d for inserting and fixing d respectively are provided. Further, positioning pins 9a and 9b for positioning with respect to the casing 2 are provided on the lid member 6.
Are provided. Then, the lid member 6 is fixed to the casing 2 so as to become a part of the casing as a supporting member for supporting each part. The cover member 6 has an insertion hole 61b into which the bearing device 8b is fitted, and the shaft 51 of the rotary piston member 5 projects from the insertion hole 61b.

The lid member 6 is provided with an intake hole 64a for taking in an external fluid into the casing 2, and an exhaust hole 64b for discharging the fluid taken into the casing 2 to the outside. And the intake hole 64a
Has an intake pipe 11b serving as a suction port for sucking an external fluid.
Are connected. On the other hand, an exhaust pipe 12b serving as a discharge port for discharging the fluid taken into the casing 2 is connected to the exhaust hole 64b.

The intake hole 64a is inserted up to the surface of the lid member 6 on the side facing the cylinder member 4, and communicates with a slit groove 62a (see FIG. 2) formed in this surface.
That is, the slit groove 62a is connected to the intake pipe 11b via the intake hole 64a, and forms a part of the suction port.

The slit groove 62a is formed in the same shape as the slit groove 22a formed on the bottom 21a of the casing 2 in the axial direction. As a result, the cylinder member 4 rotates, and the cylinder chambers 42a to 42a
The concave portions 43a to 43f formed on the side of the lid member 6 of 42f, respectively.
When 43f faces the slit groove 62a, the slit groove 6
2a communicates with each of the cylinder chambers 42a to 42f.

On the other hand, similarly, the exhaust hole 64b is also
And a slit groove 62b formed on this surface (see FIG. 2).
Leads to. That is, the slit groove 62b is connected to the exhaust pipe 12b via the exhaust hole 64b, and forms a part of the discharge port.

The slit groove 62b is formed in the same shape as the slit groove 22b formed on the bottom 21a of the casing 2 in the axial direction. Therefore, when the cylinder member 4 rotates and the concave portions 43a to 43f formed on the lid member 6 side of the cylinder chambers 42a to 42f face the slit grooves 62b, the slit grooves 62b communicate with the cylinder chambers 42a to 42f. .

The rotary cylinder device 1 described above is
When the rotary piston member 5 is rotated by a drive source (not shown) such as a motor, the rotary piston member 5 is rotated.
Of the cylinder chambers 42a, 42b, 42c, 42d, 42 of the cylinder chamber 4.
e, 42f, the pump device apparently reciprocates in the inside, thereby taking in external fluid from the two intake pipes 11a, 11b and discharging the taken-in fluid from the two exhaust pipes 12a, 12b. .

Next, the operation of the rotary cylinder device 1 will be described with reference to FIGS. 5A, 5B and 6. FIG.

In FIG. 5A, the piston 53a is
At the entrance of the cylinder chamber 42a, a part is in contact with the valve seat 21c, and another part is slightly in the cylinder chamber 42a. At this time, the cylinder chamber 42
The inside of a is already filled with the fluid taken in from the intake pipes 11a and 11b.

Incidentally, both concave portions 43a of the cylinder chamber 42a are formed.
Are the upper and lower slit grooves 22 which are part of the discharge port.
At this time, the cylinder chamber 42a has begun to face the vicinity of one end (near the start end) of each of the cylinder chambers 42b and 62b.
The two exhaust pipes 12a, 12a are provided via the two exhaust holes 24b, 64b.
2b. As a result, the cylinder chamber 4
The fluid that has been taken in 2a is in a state where it can be discharged from both exhaust pipes 12a and 12b arranged on both axial sides of the cylinder member 4. Similarly, the two T-shaped grooves 45f disposed between the cylinder chambers 42a and 42f communicate with the exhaust pipes 12a and 12b via the upper and lower slit grooves 22b and 62b, similarly to the cylinder chamber 42a. . As described above, in the present embodiment, since the discharge ports are provided on both sides in the axial direction of the cylinder member 4, the pressure balance of the fluid received by the cylinder member 4 is maintained, and the rotation balance of the cylinder member 4 is stabilized.

On the other hand, in FIG.
The piston 53b provided at a position 120 degrees clockwise from the cylinder chamber 42a has a cylinder chamber 42 adjacent to the cylinder chamber 42a.
b at the entrance of the cylinder chamber 42e at the position opposite to
A part is in contact with the valve seat 21c, and another part is slightly in the cylinder chamber 42e.

At this time, the intake of the fluid from the intake pipes 11a and 11b is completed in the cylinder chamber 42e, and the cylinder chamber 42e is in a state immediately before the fluid is completely filled. That is, at this time, the two concave portions 43e of the cylinder chamber 42e are opposed to portions near one end (near the end) of the upper and lower slit grooves 22a and 62a which are part of the suction port, respectively. Are connected to both intake pipes 11 through both slits 22a and 62a provided on both axial sides of the cylinder member 4.
a, 11b. For this reason, the cylinder chamber 42
Further, a slight amount of fluid flows into e by the subsequent operation. The two T-shaped grooves 45e arranged between the cylinder chambers 42e and 42f are also provided in the upper and lower slit grooves 22.
a, 62a communicates with both intake pipes 11a, 11b. As described above, in the present embodiment, since the suction ports are provided on both sides in the axial direction of the cylinder member 4, the pressure balance of the fluid received by the cylinder member 4 is maintained, and the rotation balance of the cylinder member 4 is stabilized.

Further, in FIG.
The piston 53c provided at a position 120 degrees clockwise from the cylinder chamber 42b is provided in the cylinder chamber 42 adjacent to the cylinder chamber 42e.
It fits in the innermost part of f. At this time, in the cylinder chamber 42f, the operation of discharging the fluid taken in from the intake pipes 11a and 11b to the exhaust pipes 12a and 12b by the operation of the piston 53c is completed, and the fluid is close to zero. .

At this time, both concave portions 43 of the cylinder chamber 42f
f is opposed to a position between both slit grooves 22a, 62a and 22b, 62b, and is in a state not opposed to either slit groove. At this time, the cylinder chambers 42b, 42c, 42d are
a, after the fluid is taken in from 62a, the valve seat 21 is moved in the direction of the discharge port with the fluid being filled inside.
c is sealed by the outer peripheral surface. After the fluid is taken into the cylinder chamber 42a, a part thereof flows into the space defined by the inner peripheral surface of the valve seat 21c and the pistons 53a and 53b, and the space is filled with the fluid.

When the rotary piston member 5 rotates in the counterclockwise direction (the direction indicated by the arrow A) from the state shown in FIG. 5A, the piston 53a enters the cylinder chamber 42a while moving into the cylinder chamber 42a. Push the inner wall in the direction of arrow A. Further, the piston 53c pushes the inner wall of the cylinder chamber 42f in the direction of arrow A while moving in the retreating direction in the cylinder chamber 42f. At the same time, the piston 53b completely comes out of the cylinder chamber 42e, and the valve seat 21
It moves in the direction of arrow A while sliding on the inner circumference of c. For this reason, the cylinder member 4 is
And rotates counterclockwise (in the direction of arrow B).

FIG. 5B shows a state in which the rotary piston member 5 has rotated by 60 degrees from the state of FIG. 5A, and the cylinder member 4 has thus rotated by 30 degrees.

That is, by the above-described operation from FIG. 5A to FIG. 5B, the piston 53a enters from the vicinity of the entrance of the cylinder chamber 42a to a position of about 70% in the cylinder chamber 42a. During this movement, the piston 53a advances into the cylinder chamber 42a while sliding on the inner wall of the cylinder chamber 42a. A magnet 5 is provided around the piston 53a.
The magnetic fluid S attracted to 6a is in a state of adhering, and this magnetic fluid S moves together with the piston 53a while filling the gap with the cylinder chamber 42.

During this time, both recesses 43a of the cylinder chamber 42a
Keeps communicating with the slit grooves 22b and 62b. Therefore, the cylinder chamber 42a of the piston 53a
The fluid in the cylinder chamber 42a is pushed out to the discharge port side by the movement in the advance direction in the inside, so that the slit grooves 22b, 6
It is discharged from the discharge pipes 12a and 12b through 2b.

At the time shown in FIG. 5B, the above-mentioned T-shaped groove 45f is displaced from the position facing the slit grooves 22b and 62b, and is replaced by a T-shaped groove 45a provided between the cylinder chambers 42a and 42b. Are slit grooves 22b and 62b
Is in a state where it has begun to face the start end portion of. That is, a total of 12 T-shaped grooves 45, 6 on each side, are always formed.
One of a to 45f communicates with the slit grooves 22b and 62b.

On the other hand, during this time, the piston 53c moves about 70% of the inside of the cylinder chamber 42a from the innermost part of the cylinder chamber 42f.
Exit to the position of the degree. Also in this movement, the piston 53c is in sliding contact with the inner wall of the cylinder chamber 42f while filling the gap by adhering the magnetic fluid S to the periphery. The rotation of the cylinder member 4 in the direction indicated by the arrow B during this time causes the two concave portions 43f of the cylinder chamber 42f to be slits 22a and 62b.
Start communicating with a. Therefore, when the piston 53c moves in the retreating direction in the cylinder chamber 42f, an external fluid is sucked into the cylinder chamber 42f through the intake pipes 11a and 11b from the slit grooves 22b and 62b.

At the time of FIG. 5B, the T-shaped groove 45e continues to communicate with the slit grooves 22a and 62a. Similarly to the above-described slit grooves 22b and 62b, the slit grooves 22a and 62a are also configured such that any one of the T-shaped grooves 45a to 45f formed by a total of twelve T-shaped grooves 45a to 45f is always communicated.

The piston 53b is connected to the valve seat 2 during this time.
It moves to an intermediate position on the inner peripheral surface of 1c. by this,
The cavity 41 side of the cylinder chamber 42e sealed by the piston 53b is opened about half, and the cylinder chamber 42e and a part of the cavity 41 form a series of spaces.
The fluid in 2e also partially flows into the cavity 41 side.

As described above, when the cylinder member 4 rotates in the direction of arrow B, the outer peripheral surface of the valve seat 21c is completely sealed at this point in the cylinder chamber 42.
c and 42d. That is, in the cylinder chamber 42b sealed at the time of FIG. 5A, the sealing by the outer peripheral surface of the valve seat 21c is opened about half, and the piston 53a,
The space surrounded by 53b and the inner peripheral surface of the valve seat 21c, that is, a series of spaces with the cavity 41 side. by this,
After a lapse of a predetermined time from the end of the suction operation into the cylinder chamber 42b, the fluids that have been completely separated into another space become a series of fluids, and again in the direction of the cylinder chamber 42b along with the operation of the piston 53b. Will be collected.

It should be noted that the valve seat 21 is operated by such an operation.
The cylinder chambers 42b to 42d rotating on the outer peripheral surface side of c,
The cylinder member 4 is moved toward the discharge port provided with the slits 22b and 62b by the rotation of the cylinder member 4 in the direction of arrow B.
That is, the fluid is sucked in at the suction port side where the slits 22a and 62a are provided, and the cylinder chambers 42b to 42d in a state where the fluid is filled pass through the outer peripheral surface side of the valve seat 21c and move to the discharge port side. I do.

As described above, the magnetic fluid S is also attached to the piston 53b that moves in the hollow portion 41, so that the magnetic fluid S is applied to the piston 53b and the valve seat 21c.
Into the gap of the sliding contact area. The magnetic fluid S is
Since the rotary piston member 5 and the cylinder member 4 are rotating at high speed, each of the pistons 53a, 53b, 53c
From the cylinder chambers 42a to 42f. However, the magnetic fluid S contains the piston 53 in each of the cylinder chambers 42a to 42f.
a to 53c enter each piston 53a again.
To 53c, and acts to fill gaps between the pistons 53a to 53c and the cylinder chambers 42a to 42f.

FIG. 6 shows a state in which the rotary piston member 5 has been further rotated by 60 degrees from the state of FIG. 5B, and the cylinder member 4 has thus been further rotated by 30 degrees.

That is, by the above-described operation from FIG. 5B to FIG. 6, the piston 53a enters from the position of about 70% in the cylinder chamber 42a to the innermost part. During this time, both recesses 43a of the cylinder chamber 42a are
It moves from the state communicating with 2b to a position not facing the slits 22b and 62b. Therefore, by moving the piston 53a to the innermost part in the cylinder chamber 42a, the fluid in the cylinder chamber 42a is discharged to the discharge port side, and the cylinder chamber 42a and the slit grooves 22b, 6
Communication with 2b ends.

The state of the piston 53a at this time is the same as the state of the piston 53c in FIG. 5A described above. The same operation as 53c is performed.

On the other hand, during this time, the piston 53c retreats from the position of about 70% in the cylinder chamber 42f to the vicinity of the entrance. During this time, both recesses 43c of the cylinder chamber 42c maintain a state of communication with the slit grooves 22a and 62a.
Therefore, the suction of the fluid into the cylinder chamber 42f is continued by the operation of the piston 53c. The state of the piston 53c at this time is the same as the state of the piston 53b in FIG. 5A described above, and the subsequent rotation operation is the same as that of the piston 53b in FIG. 5A to FIG. Is performed.

Further, the piston 53b is connected to the valve seat 2 during this time.
It moves counterclockwise from an intermediate position on the inner peripheral surface of 1c, and reaches the entrance of the cylinder chamber 42b of the cylinder member 4 rotating in the same direction. That is, the piston 53b
When viewed from the state shown in FIG. 5A, it moves from the cylinder chamber 42e across the cavity 41 to the cylinder chamber 42b. The piston 53b that has reached the entrance of the cylinder chamber 42b is in the state shown in FIG.
Is the same as the state of the piston 53a, and the subsequent operation is similar to that of the piston 53a shown in FIG.
The operation is the same as that described above.

As described above, each of the pistons 53a-53
By rotating on a predetermined trajectory in accordance with the rotation of the rotary piston member 5, c applies a rotational force to the cylinder member 4 and simultaneously enters and exits the cylinder chambers 42a to 42f. As a result, external fluid is supplied to the intake pipes 11a, 1a.
1b, the fluid is sucked into the cylinder chambers 42a to 42f, and the sucked fluid is discharged from the exhaust pipes 12a and 12b.

During such an operation, each piston 53
The magnetic fluid S attracted to the magnets 56a to 56c adheres to the periphery of the magnetic fluid S.
Work to fill gaps between the pistons 53a to 53c, the cylinder members, and the valve seat 21c. That is, the high-speed relative rotation of the rotary piston member 5 and the cylinder member 4 partitions the internal space, which continuously changes its shape, while the magnetic fluid S follows each of the pistons 53a to 53c. . As a result, leakage of the fluid between the spaces is prevented, and an efficient pump can be provided.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. is there. For example, in the rotary cylinder device 1 of the above-described embodiment, the rotary piston member 5
Each of the pistons 53a to 53c has a magnet 56
a to 56c are disposed, and the magnetic fluid S in the internal space of the cylinder member 4 is supplied to each of the pistons 53a to 53c and the cylinder member 4.
The magnet as a holding means may be provided on the cylinder member 4 side.
Further, the magnetic fluid S may be filled not only in the contact area but also in the entire wall surface of each of the cylinder chambers 42a to 42f.

Further, a plurality of magnets 56a to 56c are arranged, each having three magnets stacked in the axial direction. However, the number of magnets is not limited to three, but may be two or four or more. Good. Further, the number of magnets may be singular instead of plural. In the case of a single magnet, different poles may be alternately magnetized so as to be adjacent to each other in the axial direction, and the same effect as in the case of using a plurality of magnets may be obtained.

Further, in the above-described embodiment, the rotary piston member 5 is supported at both ends by the two bearing devices 8a and 8b. However, a single bearing device may be used to support the rotary piston member 5 at one end. However, since the rotation of the rotary piston member 5 and the rotation of the cylinder member 4 are also stabilized by using the dual support, in the present embodiment, the dual support is used.

Further, in the above-described embodiment, the cylinder member 4 is rotatably supported by the plurality of needles 32, but the outer peripheral surface of the cylinder member 4 is supported by another method instead of the needle 32. You may. Further, instead of supporting the outer peripheral surface of the cylinder member 4, a shaft may be extended to both sides in the axial direction of the cylinder member 4, and one or both sides of the shaft may be supported.

The cylinder chambers 42 a to 42 f do not communicate with the outer periphery of the cylinder member 4,
Are connected continuously, but in the case where the outer peripheral surface of the cylinder member 4 is not supported as described above, even if the outer peripheral portion of the cylinder member 4 is not connected all around. good.

Further, in the above-described embodiment, the upper and lower end portions between the cylinder chambers 42a to 42f serving as dead spaces of the cylinder member 4 are provided in order to slightly increase the effective space of the cylinder member 4 and improve the pump efficiency. , T-shaped groove 45
Although a to 45f and 46a to 46f are provided, the T-shaped groove may be provided only at one end, or both may be omitted. Further, the number of T-shaped grooves is not provided in all the portions between the cylinder members 42a to 42f.
The number may be small, such as every other one.

Further, in the above-described embodiment, the slit grooves 22a and 62a as a part of the suction port and the slit grooves 22b and 62b as a part of the discharge port are respectively provided at positions opposed to both end surfaces of the cylinder member 4. Is provided to supply and exhaust air from both sides in the axial direction of the cylinder member 4. However, the suction port and the discharge port may be provided only on one side of the cylinder member 4. Furthermore, the suction port and the discharge port may not be provided at the position facing the end face of the cylinder member 4, but may be provided at the position facing the outer peripheral surface of the cylinder member 4.

Further, in the above-described embodiment, the effective area in the cavity 41 is reduced by slidingly contacting the pistons 53a to 53c with the bottom 21a of the casing 2 and the airtightness in the cavity 41 is improved. Although the crescent-shaped valve seat 21c is provided to increase the pump efficiency, the valve seat 21c may not be provided when a particularly high pump efficiency is not required.

[0089]

As described above, the rotary cylinder device of the present invention has a structure in which the rotary piston member and the cylinder member that can rotate relative to each other are provided inside the support member, and enters the cylinder chamber. A magnetic fluid is arranged in a gap formed between the piston and the cylinder chamber to fill the gap. For this reason, even when the piston and the cylinder member are not configured with such high component accuracy, the magnetic fluid that fills the gap performs a sealing effect at that portion. As a result, it is possible to prevent the efficiency loss due to the outflow of the fluid from the gap without significantly improving the component accuracy.
A high-performance rotary cylinder device can be obtained at low production cost.

The rotary cylinder device according to another aspect of the present invention has a configuration in which a rotary piston member and a cylinder member that can rotate relative to each other are provided inside the support member. A bearing member slidably receiving the outer peripheral surface of the cylinder member is disposed on the opposing surface portion of the cylinder member. Therefore, the rotational balance of the cylinder member in the radial direction is improved, and "runout" during rotation is minimized, so that the rotation operation is stabilized. As a result, a highly reliable rotary cylinder device that operates smoothly can be provided.

The rotary cylinder device according to another aspect of the present invention has a configuration in which a rotary piston member and a cylinder member that can rotate relative to each other are provided inside the support member, and both ends of the support member in the axial direction of the cylinder member are provided. A discharge port and a suction port communicating with the cylinder chamber are formed in each of the opposing surface portions with respect to the surface. Therefore, the pressure balance in the thrust direction of the cylinder member is improved, and the "runout" during rotation is minimized, so that the rotation operation is stabilized. As a result, a highly reliable rotary cylinder device that operates smoothly can be provided.

The rotary cylinder device according to another aspect of the present invention has a configuration in which a rotary piston member and a cylinder member that are rotatable relative to each other are provided inside the support member, and is inserted and fixed to the rotation center of the rotary piston member. The rotating shaft is supported at two positions with the rotary piston member interposed therebetween. Therefore, the rotation of the rotary piston member is stabilized by the double-sided bearing, and the rotation operation of the cylinder member accompanying the rotation is also stabilized. as a result,
"Wobble" due to rotation of the rotary piston member and the cylinder member is minimized, and the rotation is stabilized, so that a rotary cylinder device with high operation accuracy can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a rotary cylinder device according to an embodiment of the present invention.

FIG. 2 is a front view showing only a casing and a cover member in a cross section in a state where the rotary cylinder device shown in FIG. 1 is assembled.

FIG. 3 is a view of the rotary cylinder device shown in FIG. 2 viewed from a direction indicated by an arrow III with a lid member removed.

FIG. 4 shows the rotary cylinder device II shown in FIG.
It is I-III sectional drawing.

FIG. 5 is a view for explaining the operation of the rotary cylinder device according to the embodiment of the present invention, and FIG. 5 (A) is a view showing a state in which two pistons have slightly entered from respective inlet portions of two cylinder chambers; (B) is a diagram showing a state in which the rotary piston member has rotated 60 degrees and the cylinder member has rotated 30 degrees from the state of (A).

6 is a view for explaining the operation of the rotary cylinder device according to the embodiment of the present invention, in which the rotary piston member is further rotated by 60 degrees and the cylinder member is further rotated by 30 degrees from the state of FIG. 5B. FIG.

FIG. 7 is an exploded perspective view showing a conventional rotary cylinder device.

8A and 8B are diagrams showing a state change due to the operation of the rotary cylinder device of FIG. 7, in which FIG. 8A shows a state in which two pistons have entered each of the two cylinder chambers, and FIG. A view showing a state in which the support member is rotated by 30 degrees from the state of A), FIG. 4C is a view showing a state in which the support member is rotated by 30 degrees from the state of FIG. 3B, and FIG. It is a figure showing the state where a member rotated 30 degrees.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotary cylinder device 2 casing (supporting member) 3 bearing member 4 cylinder member 5 rotary piston member 22a, 22b slit groove (part of suction port) 22b, 62b slit groove (part of discharge port) 31 long hole (bearing) Part of member) 32 Needle (part of bearing member) 41 Cavity part 41a Inner wall part 42a to 42f Cylinder chamber 51 (rotation) shaft 53a, 53b, 53c Piston 56a, 56b, 56c Magnet (holding means) o Axis S Magnetic fluid

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) F04C 18/00 F04C 18/00 Z F Term (Reference) 3H041 AA02 BB03 CC01 CC11 DD03 DD05 DD21 3H044 AA02 BB03 CC01 CC11 DD03 DD05 DD09 DD36

Claims (8)

[Claims] 1. A cylinder member having a circular hollow portion, a cylinder chamber connected to the hollow portion and extending to the outer periphery, and a position eccentric from an axis of the cylinder member rotates about a center of rotation to enter and exit the cylinder chamber. A rotary piston member having a piston and rotatable relative to the cylinder member, a support member having the cylinder member and the rotary piston member therein, and having a suction port and a discharge port connected to the cylinder chamber. A magnetic fluid is disposed in a gap formed between the piston entering the cylinder chamber and the cylinder chamber, and the magnetic fluid is filled in the gap. 2. The rotary cylinder device according to claim 1, further comprising a holding means for holding said magnetic fluid near a contact portion between said piston and said cylinder chamber. 3. The magnet as the holding means, wherein a plurality of magnets are arranged on the piston so as to overlap with each other in the axial direction, and the adjacent poles are arranged to have different polarities. The rotary cylinder device according to claim 2, wherein 4. A bearing member slidably receiving an outer peripheral surface of the cylinder member at a portion of the support member facing the outer peripheral surface of the cylinder member, and an axial direction of the cylinder member of the support member. The rotary cylinder device according to claim 1, 2, or 3, wherein a discharge port and a suction port communicating with the cylinder chamber are formed in each of the opposing surface portions with respect to both end surfaces. 5. The rotary shaft inserted and fixed to the center of rotation of the rotary piston member is supported at two positions sandwiching the rotary piston member. 5. The rotary cylinder device according to 4. 6. A cylinder member having a circular hollow portion, a cylinder member connected to the hollow portion and extending to the outer periphery, and a cylinder eccentric from an axis of the cylinder member rotates about a rotation center to enter and exit the cylinder chamber. A rotary piston member having a piston and rotatable relative to the cylinder member, a support member having the cylinder member and the rotary piston member therein, and having a suction port and a discharge port connected to the cylinder chamber. And a bearing member for slidably receiving the outer peripheral surface of the cylinder member at a portion of the support member facing the outer peripheral surface of the cylinder member. 7. A cylinder member having a circular hollow portion, a cylinder chamber connected to the hollow portion and extending to the outer periphery, and a position eccentric from the axis of the cylinder member rotates about a rotation center to enter and exit the cylinder chamber. A rotary piston member having a piston and rotatable relative to the cylinder member, a support member having the cylinder member and the rotary piston member therein, and having a suction port and a discharge port connected to the cylinder chamber. And a discharge port and a suction port communicating with the cylinder chamber are formed in each of the opposing surfaces of the support member with respect to both axial end faces of the cylinder member. 8. A circular hollow portion, a cylinder member having a cylinder chamber connected to the hollow portion and extending to the outer periphery, and a position eccentric from an axis of the cylinder member rotates about a rotation center to enter and exit the cylinder chamber. A rotary piston member having a piston and rotatable relative to the cylinder member, a support member having the cylinder member and the rotary piston member therein, and having a suction port and a discharge port connected to the cylinder chamber. A rotary shaft inserted and fixed to the center of rotation of the rotary piston member,
A rotary cylinder device, which is supported at two positions with the rotary piston member interposed therebetween.