JP2018025232A - Rotary cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary cylinder capable of preventing occurrence of seizure of components and liquid spill by easily bringing a screwing amount of piping into a proper range.SOLUTION: A rotary support 4 includes a journaling part 40 to journal a rotary shaft part 2a of a cylinder body 2, and a protrusion 46 that protrudes outward from an outer peripheral surface of the journaling part 40. First fluid input-output means 12a includes: a first fluid passage part 11a whose one end is communicated with a first space 10a and whose the other end is provided with a tapered first female screw part 42 communicated with a front end surface of the protrusion 46; and first piping 9a having a tapered first male screw part 9c to be engaged with the first female screw part 42.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a rotating cylinder which is attached to a machine tool such as a lathe and rotatably supports a chuck device and performs a gripping operation or a gripping state releasing operation by the chuck device.

  Conventionally, for example, a rotating cylinder disclosed in Patent Document 1 includes a cylinder body having a slide hole at the center of rotation, a piston fitted into the slide hole so as to be slidable along the center of rotation, and the cylinder. A rotation support body that rotatably supports the main body via a bearing, and the cylinder main body is formed with a cylinder chamber that extends annularly around the rotation center and that opens to the slide hole. The piston includes an annular flange portion extending around the rotation center, and the flange portion is accommodated in the cylinder chamber and divides the cylinder chamber into first and second spaces along the rotation center. The outer peripheral wall of the cylinder body has a first fluid guide hole having one end opened in the first space and the other end opened in the outer peripheral surface of the cylinder body, and one end opened in the second space and the other end. Are formed in the outer peripheral surface of the cylinder body. Annular first and second groove portions extending around the center of rotation are formed on the inner peripheral surface of the rotation support, and the first and second groove portions are the other of the first and second fluid guide holes, respectively. It corresponds to each end part. The fluid is allowed to flow into the first space via the first groove and the first fluid guide hole, while the fluid is allowed to flow out of the second space via the second fluid guide hole and the second groove. Alternatively, the fluid is allowed to flow into the second space via the second fluid guide hole and the second groove portion, while the fluid is allowed to flow from the first space via the first groove portion and the first fluid guide hole. By letting it flow out, the piston slides along the rotation center.

JP 2006-21313 A

  By the way, two pipes are provided at positions corresponding to the first groove portion and the second groove portion on the outer peripheral wall of the rotary support in the rotary cylinder as in Patent Document 1. A male screw part is provided at the end of each pipe, while a female screw part is formed on the outer peripheral wall of the rotary support, and the male screw part of the pipe is screwed into the female screw part. The rotary support is connected to each other.

  However, in a rotating cylinder such as that disclosed in Patent Document 1, generally, an operator manually performs pipe screwing work, and therefore, the pipe screwing work tends to vary among workers. Therefore, when the screwing amount of the pipe by the operator is larger than the proper range, the male screw part of the pipe and the female screw part of the rotation support body are generally tapered to increase the degree of close contact with each other. , The male threaded part of the piping pushes the female threaded part apart and the rotational support deforms, so that there is no gap between the rotational support and the cylinder body, and the rotational support and cylinder body are moved during the rotation of the cylinder body. While there is a risk that seizure will occur in each part due to contact, if the screwing amount of the pipe by the operator is smaller than the appropriate range, the male screw part of the pipe and the female screw part of the rotating support will be in close contact with each other. There was a risk that the fluid would leak out from the part because the degree was low.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a rotating cylinder that can easily prevent screwing of parts and occurrence of liquid leakage by simply setting the screwing amount of piping within an appropriate range. There is to do.

  In order to achieve the above object, the present invention is characterized in that the position of the female screw portion into which the male screw portion of the pipe is screwed away from the portion approaching the cylinder body in the rotary support.

  Specifically, a cylinder body having a slide hole at the center of rotation, a piston fitted in the slide hole so as to be slidable along the center of rotation, and the cylinder body are supported rotatably around the center of rotation. A rotating support body, and the cylinder body includes a rotating shaft portion having a cylinder center line coinciding with the rotation center, and a rotating disk portion formed continuously with the rotating shaft portion and having a center axis coinciding with the rotation center. And a cylinder chamber formed inwardly of the rotating disk portion and extending annularly around the rotation center and opening in the slide hole, and the piston extends annularly around the rotation center, and And a flange portion that is accommodated in the cylinder chamber and divides the cylinder chamber into first and second spaces, and fluid is supplied to the first and second spaces in the cylinder body and the rotation support body. Fluid and out means for sliding along the rotation about said piston to target rotating cylinder provided, took solutions, such as: by putting to.

  That is, in the first invention, the rotation support body includes a cylindrical shaft support portion that supports the rotation shaft portion, and a protruding portion that protrudes outward from the outer peripheral surface of the shaft support portion, and the fluid The entry / exit means includes a fluid passage portion having one end opened in the first or second space and a tapered female screw portion opened on the tip end surface of the projecting portion on the other end side, and the female screw portion. And a pipe having a tapered male screw part to be screwed together.

  According to a second invention, in the first invention, the protruding portion is provided on a distal end side of the protruding portion, and has a distal end portion having the female screw portion, and the distal end portion on the proximal end side of the protruding portion. And a base portion provided continuously.

  In a third invention, in the second invention, the tip portion and the base portion are integrally formed, and an outer shape of the tip portion is formed to be smaller than an outer shape of the base portion. It is characterized by.

  According to a fourth invention, in the second invention, the distal end portion and the base portion are formed separately, and the distal end portion is attached to the base portion by fastening.

  In the first invention, when the operator screws the male threaded portion of the pipe into the female threaded portion, the female threaded portion is located far from the rotating shaft portion of the cylinder body by the protruding portion. Even if the area around the female screw portion of the protruding portion is deformed, the influence of the deformed portion hardly affects the shaft support portion, and the deformation of the shaft support portion is reduced. Therefore, the proper range of the screwing amount of the pipe is substantially wider than that of the rotating cylinder as in Patent Document 1, and even if the screwing operation by the operator varies somewhat, the shaft support portion of the rotating support body is deformed too much, Alternatively, the degree of adhesion between the male threaded portion of the pipe and the female threaded portion is eliminated, and seizure between the shaft support portion of the rotating support and the rotating shaft portion of the cylinder body and the male screw of the piping are eliminated. The liquid leakage from between the part and the female screw part can be prevented.

  In the second aspect of the invention, the female screw portion is in a position biased toward the tip side of the projecting portion, so even if the periphery of the female screw portion of the projecting portion is deformed during the screwing operation of the pipe, The influence exerted is further reduced, and the appropriate range of the screwing amount of the pipe can be further widened as compared with the first invention.

  In the third invention, since the rigidity of the tip portion is lower than that of the base portion in the protruding portion, when the screwing amount of the pipe is increased, the tip portion having low rigidity is greatly deformed, while the influence of the deformed tip portion is influenced by the tip portion. It becomes difficult to reach the base part having higher rigidity, and the influence of the deformation around the female screw part in the projecting part can be further less likely to reach the shaft support part.

  In the fourth aspect of the invention, since the tip and the base of the projecting part are separate from each other, when the operator screws the male threaded part of the pipe into the female threaded part, the amount of screwing into the pipe increases and the tip part deforms. Even if it does, the influence of the deformation | transformation part becomes difficult to reach a base part, and the influence of the deformation | transformation around the internal thread part in a protrusion part becomes further difficult to spread with respect to a shaft support part.

It is sectional drawing of the rotation cylinder which concerns on Embodiment 1 of this invention. It is an II arrow directional view of FIG. FIG. 2 is a view corresponding to FIG. 1 showing a state in which a piston is slidingly moved. FIG. 4 is a view taken along arrow IV in FIG. 2. It is sectional drawing in the VV line of FIG. FIG. 5 is a view corresponding to FIG. 4 according to Embodiment 2 of the present invention. It is sectional drawing in the VII-VII line of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.
Embodiment 1 of the Invention
1 and 2 show a rotating cylinder 1 according to Embodiment 1 of the present invention. The rotating cylinder 1 rotatably supports a chuck device (not shown) attached to a machine tool such as a lathe and performs a gripping operation or a releasing operation of the gripping state by the chuck device. A cylinder body 2 having a T-shape is provided.

  The cylinder body 2 includes a rotating shaft portion 2a having a cylindrical shape, a rotating disk portion 2b that is provided continuously to one end of the rotating shaft portion 2a, and whose center axis coincides with the cylinder center line of the rotating shaft portion 2a. And the center axis of the rotary shaft portion 2a and the central axis of the rotary disc portion 2b can be rotated around the rotation center C1.

  A slide hole 20 that opens at both ends is formed at the rotation center C1 of the cylinder body 2, and a cylinder that extends annularly around the rotation center C1 and opens at the slide hole 20 is formed at the rotary disk portion 2b. A chamber 10 is formed.

  A ring portion 2f projecting stepwise along the rotation center C1 is formed at a continuous portion of the outer peripheral surface of the rotating disk portion 2b and the outer peripheral surface of the rotating shaft portion 2a.

  A ring-shaped stopper member 2g that protrudes in a direction perpendicular to the rotation center C1 and extends around the rotation center C1 is attached to the other end of the rotation shaft portion 2a. The stopper member 2g is connected to the ring portion 2f. It is a position at a predetermined interval.

  Further, the first fluid guide having one end opened to the cylinder chamber 10 and the other end opened to the middle of the outer peripheral surface of the rotary shaft 2a on the outer peripheral walls of the rotary shaft 2a and the rotary disc 2b. A hole 2d and a second fluid guide hole 2e are formed.

  The piston 3 is fitted into the slide hole 20 so as to be slidable along the rotation center C1.

  The piston 3 includes a cylindrical portion 3a whose cylinder center line coincides with the rotation center C1, and a flange portion 3b that protrudes outward from the outer peripheral surface of the cylindrical portion 3a and extends annularly around the rotation center C1. As shown in FIG. 3, the flange portion 3b is accommodated in the cylinder chamber 10 and divides the cylinder chamber 10 into a first space 10a and a second space 10b in the extending direction of the rotation center C1. ing.

  A lid cover 3c is attached to an end portion of the cylindrical portion 3a on the side away from the rotating disk portion 2b so as to close an opening portion of the end portion.

  Around the rotation shaft portion 2a, there is provided a rotation support 4 that supports the rotation shaft portion 2a so as to be rotatable around the rotation center C1.

  The rotary support 4 includes a cylindrical annular portion 41 having a cylindrical center line coinciding with the rotational center C1, a liquid reservoir portion 44 that is attached to the lower portion of the annular portion 41 and has a vertically short cylindrical shape, A cover member 45 that is fixed to one opening side periphery of the annular portion 41 and covers the other end side of the rotating shaft portion 2a and the lid cover 3c side of the piston 3 is provided.

  The annular portion 41 has a shaft support hole 41a at the rotation center C1, and the shaft portion 2a of the cylinder body 2 is inserted into the shaft support hole 41a.

  On the inner peripheral surface of the annular portion 41, an annular wide portion 41b is formed which extends toward the rotational shaft portion 2a and extends in an annular shape around the rotational center C1 in the extending direction of the rotational center C1. A minute gap is provided between the distal end surface of the wide portion 41b and the outer peripheral surface of the rotary shaft portion 2a.

  Bearings B1 are provided between the annular wide portion 41b and the ring portion 2f, and between the annular wide portion 41b and the stopper member 2g, respectively. It is interposed between the inner peripheral surface forming the shaft support hole 41a and the outer peripheral surface of the rotary shaft portion 2a.

  The annular portion 41 and the two bearings B1 constitute the shaft support portion 40 of the present invention, and the shaft support portion 40 can rotate the rotating shaft portion 2a around the rotation center C1 by the both bearings B1. It is pivotally supported.

  An annular first groove portion 41c and a second groove portion 41d extending around the rotation center C1 are juxtaposed on the front end surface of the annular wide portion 41b, and the first groove portion 41c is the other end of the first fluid guide hole 2d. In addition, the second groove 41d corresponds to the other end of the second fluid guide hole 2e.

  As shown in FIG. 2, a projecting portion 46 that protrudes outward from the outer peripheral surface of the annular portion 41 and has a vertically long shape is provided on one side surface of the annular portion 41. As shown in FIG. 4, it has a substantially glasses shape in a side view.

  As shown in FIGS. 4 and 5, the protruding portion 46 is continuously provided on the distal end portion 47 provided on the distal end side of the protruding portion 46 and on the proximal end side of the protruding portion 46. The tip portion 47 and the base portion 48 are integrally formed.

  The outer peripheral surface of the protruding portion 46 has a stepped shape in which the outer peripheral surface of the distal end portion 47 is smaller than the outer peripheral surface of the base portion 48.

  That is, the outer shape of the tip portion 47 is formed to be smaller than the outer shape of the base portion 48.

  As shown in FIG. 5, the lower half of the protrusion 46 has a tapered first opening that opens to the tip surface of the tip 47 and communicates with the first groove 41c via the first communication portion 42a. A female screw portion 42 is formed, and the first female screw portion 42 is located at the tip portion 47.

  On the other hand, in the upper half of the protrusion 46, there is a tapered second female screw portion 43 that opens to the tip surface of the tip portion 47 and communicates with the second groove portion 41d via the second communication portion 43a. The second female screw portion 43 is formed at the tip portion 47.

  The first fluid guide hole 2d, the first groove portion 41c, the first communication portion 42a, and the first female screw portion 42 constitute the first fluid passage portion 11a of the present invention, and the second fluid guide hole 2e. The second groove portion 41d, the second communication portion 43a, and the second female screw portion 43 constitute the second fluid passage portion 11b of the present invention, and one end of the first fluid passage portion 11a is the first fluid passage portion. One end of the second fluid passage portion 11b opens into the second space 10b, while opening into the first space 10a.

  As shown in FIGS. 2 and 4, on one side of the annular portion 41, a first pipe 9a having a substantially L shape in a side view that allows fluid to flow into and out of the first groove portion 41c and the second groove portion 41d. And the 2nd piping 9b is provided.

  As shown in FIG. 5, the first pipe 9 a has a tapered first male screw portion 9 c, and the first male screw portion 9 c is screwed into the first female screw portion 42. ing.

  The second pipe 9b has a tapered second male screw portion 9d, and the second male screw portion 9d is screwed into the second female screw portion 43.

  The first fluid passage portion 11a and the first piping 9a constitute the first fluid inlet / outlet means 12a of the present invention, while the second fluid passage portion 11b and the second piping 9b constitute the second fluid of the present invention. The piston 3 constitutes the inflow / outlet means 12b, and the piston 3 allows the fluid to flow into the first space 10a by the first fluid in / out means 12a and outflows the fluid from the second space 10b by the second fluid in / out means 12b. Then, while sliding to one side along the rotation center C1, the fluid is caused to flow into the second space 10b by the second fluid in / out means 12b and the fluid from the first space 10a by the first fluid in / out means 12a. Is caused to slide to the other side along the rotation center C1.

  As described above, according to the first embodiment of the present invention, the operator uses the first male screw portion 9c of the first pipe 9a as the first female screw portion 42 and the second male screw portion 9d of the second pipe 9b as the second female screw. When screwing into the screw part 43, the first female screw part 42 and the second female screw part 43 are located far away from the rotating shaft part 2a of the cylinder body 2 by the projecting part 46. Even if the amount of screwing in the second pipe 9b is increased and the first female screw portion 42 or the second female screw portion 43 of the projecting portion 46 is deformed, the influence of the deformed portion hardly affects the shaft support portion 40. The deformation of the support portion 40 is reduced. Therefore, even if the appropriate range of the screwing amount of the first pipe 9a and the second pipe 9b is substantially wider than that of the rotary cylinder 1 as in Patent Document 1, and the screwing work by the operator varies somewhat, the rotation support body 4 is excessively deformed, or the degree of adhesion between the first male screw portion 9c of the first pipe 9a and the first female screw portion 42, or the second male screw portion of the second pipe 9b. The degree of adhesion between 9d and the second female screw portion 43 is reduced, and seizure between the shaft support portion 40 of the rotary support 4 and the rotary shaft portion 2a of the cylinder body 2 or the first Liquid leakage from between the first male screw portion 9c and the first female screw portion 42 of the pipe 9a and from between the second male screw portion 9d and the second female screw portion 43 of the second pipe 9b can be prevented. .

  In addition, since the first female screw portion 42 and the second female screw portion 43 are formed at the distal end portion 47 of the protruding portion 46, the first female screw portion 42 and the second female screw portion 43 are also the distal ends of the protruding portions 46. The position is biased to the side. Therefore, even if the first female screw portion 42 or the second female screw portion 43 of the projecting portion 46 is deformed during the screwing operation of the first pipe 9a and the second pipe 9b, the influence of the deformed portion on the shaft support portion 40 is affected. Can be further reduced, and the appropriate range of the screwing amounts of the first pipe 9a and the second pipe 9b can be further widened.

Furthermore, since the distal end portion 47 and the base portion 48 of the protruding portion 46 are integrally formed and the outer shape of the distal end portion 47 is smaller than the outer shape of the base portion 48, the rigidity of the distal end portion 47 in the protruding portion 46 is higher than that of the base portion 48. Lower. Therefore, when the screwing amount of the first pipe 9a or the second pipe 9b is increased, the distal end portion 47 having low rigidity is greatly deformed, while the influence of the deformed distal end portion 47 is exerted on the base portion 48 having higher rigidity than the distal end portion 47. Thus, the influence of the deformation around the first female screw portion 42 or the second female screw portion 43 in the protruding portion 46 can be further reduced compared to the shaft support portion 40.
<< Embodiment 2 of the Invention >>
6 and 7 show a rotary cylinder 1 according to Embodiment 2 of the present invention. In the second embodiment, only the partial structure of the protruding portion 46 is different from that of the first embodiment, and the others are the same as those of the first embodiment. Therefore, only the portions different from the first embodiment will be described in detail below.

  In the protruding portion 46 of the second embodiment, a tip portion 47 and a base portion 48 are formed separately, and the base portion 48 of the second embodiment has the same shape as the base portion 48 of the first embodiment.

  On the other hand, the distal end portion 47 of the second embodiment has a rectangular plate shape extending in the vertical direction, and the first female screw portion 42 and the second female screw portion 43 are formed.

  A first annular stepped portion 48a is formed on the peripheral edge of the first communicating portion 42a on the distal end portion 47 side of the base portion 48, and an annular first seal member 6 made of a rubber material is formed on the first annular stepped portion 48a. Are mated.

  A second annular stepped portion 48b is formed on the peripheral edge of the second communicating portion 43a on the distal end portion 47 side of the base portion 48, and an annular second seal member 7 made of a rubber material is formed on the second annular stepped portion 48b. Are mated.

  The distal end portion 47 is fastened by a plurality of bolts 49 so that the first female screw portion 42 corresponds to the first communication portion 42a and the second female screw portion 43 corresponds to the second communication portion 43a. And attached to the base 48.

  As described above, according to the second embodiment of the present invention, the tip portion 47 and the base portion 48 of the projecting portion 46 are separate from each other, so that the operator can connect the first male screw portion 9c of the first pipe 9a to the first female screw. When the second male screw portion 9d of the second pipe 9b is screwed into the second female screw portion 43 into the portion 42, the amount of screwing of the first pipe 9a or the second pipe 9b increases and the tip portion 47 is deformed. However, the influence of the deformed portion does not easily reach the base portion 48, and the influence of the deformation around the first female screw portion 42 or the second female screw portion 43 in the protruding portion 46 is further less likely to affect the shaft support portion 40.

  The present invention is suitable for a rotary cylinder that is attached to a machine tool such as a lathe and rotatably supports a chuck device and performs a gripping operation or a gripping state releasing operation by the chuck device.

DESCRIPTION OF SYMBOLS 1 Rotating cylinder 2 Cylinder main body 2a Rotating shaft part 2b Rotating disk part 3 Piston 3b Flange part 4 Rotating support body 9a 1st piping 9b 2nd piping 9c 1st male thread part 9d 2nd male thread part 10 Cylinder chamber 10a 1st space 10b 2nd space 11a 1st fluid passage part 11b 2nd fluid passage part 12a 1st fluid entry / exit means 12b 2nd fluid entry / exit means 20 Slide hole 40 Shaft support part 42 1st female thread part 43 2nd female thread part 46 Projection part 47 Tip 48 Base C1 Center of rotation

Claims (4)

A cylinder body having a slide hole at the center of rotation;
A piston slidably inserted into the slide hole along the rotation center;
A rotation support that rotatably supports the cylinder body around the rotation center;
The cylinder body has a rotation shaft portion with a cylinder center line coinciding with the rotation center, a rotation disk portion formed continuously with the rotation shaft portion, and a center axis coinciding with the rotation center, and the rotation disk portion A cylinder chamber formed inward and extending annularly around the rotation center and opening in the slide hole;
The piston is provided with a flange portion that extends annularly around the rotation center and is accommodated in the cylinder chamber and divides the cylinder chamber into first and second spaces,
The cylinder body and the rotary support body are provided with a fluid cylinder that is provided with fluid entry / exit means for sliding the piston along the rotation center by taking fluid into and out of the first and second spaces,
The rotating support includes a cylindrical shaft supporting portion that supports the rotating shaft portion, and a protruding portion that protrudes outward from the outer peripheral surface of the shaft supporting portion,
The fluid inlet / outlet means includes a fluid passage portion having one end opened in the first or second space and a tapered female screw portion opened in the tip end surface of the projecting portion on the other end side, and the female screw And a pipe having a taper-shaped male screw part screwed into the part. The rotating cylinder according to claim 1,
The protrusion is provided on the distal end side of the protrusion, and includes a distal end portion having the female screw portion, and a base portion continuously provided on the distal end portion on the proximal end side of the protrusion. A rotating cylinder characterized by that. The rotary cylinder according to claim 2,
The tip portion and the base portion are integrally formed,
A rotating cylinder characterized in that an outer shape of the tip portion is formed to be smaller than an outer shape of the base portion. The rotary cylinder according to claim 2,
The tip part and the base part are formed separately,
The rotary cylinder is characterized in that the tip portion is attached to the base portion by fastening.

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