JP5393908B1 - Axial drive indexing device - Google Patents

Abstract

Provided is a shaft-driven indexing device that can be indexed and rotated in both paths with a simple structure, saves space, and is advantageous in terms of cost.
In a forward path when the piston cylinder body 9 is lifted, the cam function works due to sliding between the first engagement portion 10 and the first receiving portion 12, and the rotational force in the circumferential direction is transmitted to the piston cylinder body 9. The rotary table 8 is rotated by a predetermined circumferential angle. In the return path when the piston cylinder 9 descends, the cam function works due to the sliding of the second engaging portion 11 and the second receiving portion 13, receives the rotational force in the circumferential direction, and transmits it to the piston cylinder 9 to rotate. The table 8 is rotated by a predetermined circumferential angle. As the piston cylinder 9 reciprocates, the index rotation operation is performed not only in one path but also in both the forward path and the return path, so that the indexing function is high and the indexing workability is improved.
[Selection] Figure 1

Description

  The present invention relates to an axial drive type indexing device in which a piston cylinder receives fluid pressure and reciprocates along a drive shaft to operate a driven body such as a rotary table. The present invention relates to an axial drive type indexing device improved to index a rotary table in both paths.

As indexing devices, there are known index tables, rotary table indexing devices, and rotary tables (see, for example, Patent Documents 1-3).
The index table disclosed in Patent Document 1 has a structure in which a worm wheel and a worm are incorporated, and the table is rotated through a rotary joint by driving a motor. As a result, the components of the rotary joint can be easily attached and detached, and the rotary joint can be inspected and repaired without removing the table.

In the rotary table indexing device of Patent Document 2, a motor composed of a stator and a rotor is built in, and the rotary table is indexed and operated by disconnecting power to the motor. Even when the power supply to the indexing device is cut off, the stop position of the rotary table can be reliably held.
In the rotary table of Patent Document 3, a worm wheel and a worm are incorporated, and the center shaft and the rotary table are integrally rotated by a drive source such as a step motor. By incorporating the rotary joint, it is possible to always supply the air pressure and hydraulic pressure sent from the air pressure or hydraulic pressure supply source through the input opening to the upper end outlet regardless of whether or not the rotary table is operated.

In the thing of patent documents 1-3, since a worm wheel and a worm are built in, or a motor is constituted, there is a disadvantage that the whole structure is complicated and the weight becomes large and difficult to handle.
An indexing device 50 shown in FIG. 6 appears as a model developed to solve this problem. By alternately sending compressed air to the ports 52 and 53 formed above and below the cylindrical column 51, the piston cylinder 55 reciprocates in the vertical direction H along the stepped cylindrical drive shaft 54.
Since the cam side 55a slides on the inclined side 56 when the piston cylinder 55 is lowered, the cam action works between the sides 55a and 56, and the component force in the rotational direction J acts on the piston cylinder 55. The table 59 is rotated in the same direction via the pin 57 and the ring body 58.

Japanese Patent Laid-Open No. 2002-18678 JP 2007-125640 A Japanese Patent No. 2930889

In the indexing device 50 shown in FIG. 6, the cam side portion 55a slides on the inclined side portion 56 each time the drive shaft 54 is lowered, so that the table is divided by an angle corresponding to the sliding amount in the downward direction. Turns out and rotates. That is, although the drive shaft 54 reciprocates up and down, the table is indexed and rotated only when the drive shaft 54 is lowered one way.
When the drive shaft 54 is raised, the cam side 55a only moves away from the inclined side portion 56. Therefore, the upward displacement of the drive shaft 54 has no transmission function and does not contribute to the indexing rotation of the table. Contributed to the inefficiency.

  The present invention has been made in view of the above circumstances, and its purpose is to perform an indexing rotation operation not only in one way but also in both forward and return paths as the piston cylinder moves back and forth. It is to provide a shaft drive type indexing device in which indexing workability is improved by improving the index.

(About claim 1)
The cylindrical column has a first entrance and a second entrance where fluid is alternately pumped. The drive shaft is provided so as to be rotatable around the axis within the cylindrical column, and a driven body is attached to one end portion. The piston cylinder is provided so as to be able to reciprocate along the drive shaft and to transmit rotation to the drive shaft. By alternately pumping fluid to the first inlet / outlet part and the second inlet / outlet part, the piston cylinder receives fluid pressure in the cylinder column and reciprocates along the drive shaft.
A plurality of first engaging portions are intermittently provided in a predetermined number along the circumferential direction at one end of the piston cylinder. A plurality of second engaging portions are intermittently provided in a predetermined number along the circumferential direction at the other end of the piston cylinder.
The plurality of first receiving portions are intermittently arranged along the circumferential direction at one end portion of the cylindrical column body, and are set so as to be slidably contacted with the first engaging portion.
The plurality of second receiving portions are intermittently provided along the circumferential direction at the other end portion of the cylindrical column body, and are set so as to slidably contact the second engaging portion.
When the fluid is pumped, in the forward path of the piston cylinder, the first engaging portion abuts on the first receiving portion and slides, so that the first engaging portion works as a cam and rotates in the circumferential direction from the first receiving portion. The force is received and transmitted to the piston cylinder, and the drive shaft is rotated together with the driven body by a predetermined circumferential angle.
In the return path of the piston cylinder, the second engaging portion slides in contact with the second receiving portion, so that the second engaging portion works as a cam and receives the rotational force in the circumferential direction from the second receiving portion, and the piston This is transmitted to the cylinder and the drive shaft is rotated together with the driven body by a predetermined circumferential angle.

In Claim 1, the circumferential direction produced by the cam action at the time of sliding with a 1st engaging part and a 1st receiving part in the going path of a piston cylinder at the time of fluid pressure feeding to the 1st entrance / exit part and the 2nd entrance / exit part Is transmitted to the piston cylinder to rotate the driven body by a predetermined circumferential angle. In the return path of the piston cylinder, the circumferential rotational force generated by sliding between the second engagement portion and the second receiving portion is received and transmitted to the piston cylinder to rotate the driven body by a predetermined circumferential angle. .
That is, with the reciprocating movement of the piston cylinder, the indexing and rotating operation is performed not only in one path but also in both the forward path and the return path, so that the indexing function can be improved and the indexing workability can be improved.
In addition, with a simple structure such as sliding between the first engaging portion and the first receiving portion, and sliding between the second engaging portion and the second receiving portion, index rotation operation in both paths becomes possible, It is space-saving and advantageous in terms of cost.

(About claim 2)
The first engaging portion and the first receiving portion both have a first engaging inclined portion and a first receiving inclined portion that are inclined and slid in the same direction with respect to the drive shaft. The second engaging portion and the second receiving portion both have a second engaging inclined portion and a second receiving inclined portion that slide in an inclined direction with respect to the drive shaft.

In claim 2, the first engagement inclined portion and the first receiving inclined portion that slide with each other are formed, and the second engagement portion and the second receiving portion that slide with each other are formed, so that the forward path and Indexing rotation operation is possible in both directions of the return path.
For this reason, the indexing rotation operation in both paths accompanying the reciprocating movement of the piston cylinder is a simple structure.

(Claim 3)
The first inclination directions of both the first engagement inclined portion and the first receiving inclined portion are set opposite to the second inclination directions of both the second engaging inclined portion and the second receiving inclined portion.

  According to the third aspect of the present invention, the simple rotation of the first tilt direction and the second tilt direction can be reversed so that the indexing and rotating operation in both paths accompanying the reciprocating movement of the piston cylinder can be performed in the same direction. .

(About claim 4)
The first inclined directions of both the first engaging inclined portion and the first receiving inclined portion are set to be the same as the second inclined directions of both the second engaging inclined portion and the second receiving inclined portion.

  According to the fourth aspect of the present invention, the indexing rotation operation in both paths accompanying the reciprocating movement of the piston cylinder is alternately reversed left and right by a simple structure in which the first inclination direction and the second inclination direction are set to be the same. The driven body can be swung left and right.

(A) is a longitudinal sectional view showing an axial drive type indexing device according to the present invention, (b) is a transverse sectional view taken along line SS of (a), and (c) is a main part of the axial drive type indexing device. (Example 1) which is an expanded view which shows a part. (A)-(d) is a schematic development view showing an indexing operation (Example 1). (Example 1) which is a schematic expanded view which shows the principal part of an axial drive type indexing apparatus. (Example 2) which is a schematic expanded view which shows the principal part of an axial drive type indexing apparatus. (Example 3) which is a front view which shows a shaft drive type indexing device partially in section. It is a front view which shows a shaft drive type indexing device partly in section (prior art).

  In the shaft drive type indexing device of the present invention, the index cylinder is operated not only in one path but also in both the forward path and the return path in accordance with the reciprocating movement of the piston cylinder, thereby improving the indexing function and improving the indexing workability. The structure that improves the characteristics is a technical feature.

[Configuration of Example 1]
A first embodiment of the present invention will be described with reference to FIGS. In the following description, unless otherwise specified, the specification of the position and direction of each member corresponds to the horizontal and vertical directions of the corresponding drawings through each embodiment.
The shaft drive type indexing device 1 in FIGS. 1 (a) and 1 (c) has a cylindrical column body 2 in which a first entrance / exit portion 1a and a second entrance / exit portion 1b are formed vertically. The 1st entrance / exit part 1a and the 2nd entrance / exit part 1b which are located in the cylindrical pillar 2 are made to flow in alternately the fluid pumped by drive sources (not shown), such as a compressor.
At this time, a considerable amount of compressed air that flows into the first entrance / exit part 1a and moves the piston cylinder 9 described later is set to escape from the second entrance / exit part 1b. Further, a considerable amount of compressed air that flows into the second entrance / exit portion 1b and moves the piston cylinder 9 is set to escape from the first entrance / exit portion 1a.

  A support tube portion 3 is fitted into one end opening of the cylindrical column body 2, and a mounting tube portion 4 is fitted into the other end opening. The drive shaft 5 is disposed concentrically within the cylindrical column 2, one end 5 a is supported by the support cylinder 3 via the bearing 6, and the other end 5 b is supported by the mounting cylinder 4 via the bearing 7. Has been. As a result, the drive shaft 5 can rotate around the shaft, and the rotary table 8 is attached to the one end portion 5 a located outside the support cylinder portion 3 as a driven body. The driven body is not limited to the rotary table 8 and may be a functional member that performs rotational displacement such as a rotary shaft.

  A piston cylinder 9 is concentrically attached to the drive shaft 5, and can reciprocate up and down along the drive shaft 5 and rotate to the drive shaft 5 as indicated by arrows K 1 and K 2 in FIG. It is provided so that it can be transmitted. The piston cylinder 9 has a partition wall portion 9a that partitions the inside up and down and a lid body 9b at the lower end. As shown in FIGS. 1 (a) and 1 (b), the drive shaft 5 penetrates the partition wall portion 9a so as to be slidable in the vertical direction, and slides along the axial direction in a deformed hole portion 9c formed in the lid body 9b. It is movably fitted.

The partition wall portion 9a may be positioned between the first inlet / outlet portion 1a and the second inlet / outlet portion 1b, and when compressed air is alternately pumped as fluid to the first inlet / outlet portion 1a and the second inlet / outlet portion 1b. The piston cylinder 9 reciprocates along the drive shaft 5 in response to the air pressure as the fluid pressure through the partition wall 9 a in the cylindrical column body 2.
As shown in FIG. 1 (c), two first engaging portions 10 opposed to the radial direction R are intermittently provided at one end of the piston cylinder 9 along the circumferential direction. Two second engaging portions 11 opposed to the radial direction R are intermittently provided at the other end portion of the piston cylinder 9 along the circumferential direction.

Two first receiving portions 12 that are opposed to each other in the radial direction R are intermittently arranged along the circumferential direction at the lower end portion of the support cylinder portion 3 that is one end portion of the cylindrical column body 2, and the first engagement portion 10 is set so as to be slidable.
Two second receiving portions 13 opposed to the radial direction R are intermittently provided along the circumferential direction at the upper end portion of the mounting cylinder portion 4 which is the other end portion of the cylindrical column body 2, and the second engagement. It is set so as to contact the portion 11 so as to be slidable.

As shown in FIG. 2, the first engaging portion 10 and the first receiving portion 12 form a triangular apex having an acute tip, and both of them slide in an inclined direction with respect to the drive shaft 5. It has the 1 engaging inclination part 10a and the 1st receiving inclination part 12a.
The second engaging portion 11 and the second receiving portion 13 also form triangular apexes with sharp tips, and both the second engaging inclined portion 11a and the second engaging inclined portion 11a slide in the same direction with respect to the drive shaft. It has the receiving inclination part 13a.

  The inclinations of both the first engagement inclined part 10a and the first receiving inclined part 12a are defined as a first inclination direction T, and the inclinations of both the second engaging inclined part 11a and the second receiving inclined part 13a are defined as a second inclination direction P. And In this case, the first tilt direction T and the second tilt direction P are set to be opposite to each other.

In the above-described configuration, the compressed cylinder air is reciprocated in the vertical direction Ks along the drive shaft 5 by alternately sending the compressed air to the first inlet / outlet part 1a and the second inlet / outlet part 1b (FIG. 1 (a ) And (b)).
As shown in FIG. 3A, in the forward path in the process in which the piston cylinder 9 rises along the axial direction N <b> 1, the first engagement inclined portion 10 a of the first engagement portion 10 is the first receiving portion 12. 1 Abuts on the receiving inclined portion 12a and slides while receiving a cam action (see FIG. 3B).
As a result, the first engaging portion 10 receives the rotational force in the circumferential direction M from the first receiving portion 12 acting as a cam and transmits it to the piston cylinder 9, and the drive shaft 5 together with the rotary table 8 in a predetermined direction. It is rotated by a circumferential angle (for example, 90 degrees).

As shown in FIG. 3C, in the return path in the process in which the piston cylinder 9 descends along the axial direction N <b> 2, the second engagement inclined portion 11 a of the second engagement portion 11 is connected to the second receiving portion 13. 2 Abuts on the receiving inclined portion 13a and slides while receiving a cam action (see FIG. 3D).
As a result, the second engaging portion 11 receives a rotational force in the circumferential direction M from the second receiving portion 13 that acts as a cam and transmits the rotational force to the piston cylinder 9, and the drive shaft 5 together with the rotary table 8 in the same direction. It is rotated by a circumferential angle (for example, 90 degrees).

[Effect of Example 1]
In the first embodiment, the cam at the time of sliding between the first engaging portion 10 and the first receiving portion 12 in the forward path of the piston cylinder 9 when the compressed air is pumped to the first inlet / outlet portion 1a and the second inlet / outlet portion 1b. The circumferential rotational force generated by the action is transmitted to the piston cylinder 9 to rotate the rotary table 8 by a predetermined circumferential angle (for example, 90 degrees).
In the return path of the piston cylinder 9, the rotational force generated in the circumferential direction generated by the sliding between the second engagement portion 11 and the second receiving portion 13 is received and transmitted to the piston cylinder 9, and the rotary table 8 is moved to a predetermined circumference. Rotate by an angle (eg 90 degrees).

That is, as the piston cylinder 9 reciprocates, the index rotation operation is performed not only in one path but also in both the forward path and the return path, so that the indexing function can be enhanced and the indexing workability can be improved.
In addition, the index rotation operation in both paths is simple with the sliding between the first engaging portion 10 and the first receiving portion 12 and the sliding between the second engaging portion 11 and the second receiving portion 13. Therefore, it is space-saving and advantageous in terms of cost.

The first engaging portion 10 and the first receiving portion 12 are formed with a first engaging inclined portion 10a and a first receiving inclined portion 12a that slide on each other, and the second engaging portion 11 and the second receiving portion. The portion 13 is formed with a second engaging inclined portion 11a and a second receiving inclined portion 13a that slide on each other.
For this reason, the index rotation operation in both the paths accompanying the reciprocating movement of the piston cylinder 9 is a simple structure.

  Further, the inclination of both the first engagement inclined portion 10a and the first receiving inclined portion 12a is defined as the first inclination direction T, and the inclination of both the second engaging inclined portion 11a and the second receiving inclined portion 13a is the second inclined direction. The direction was P. With a simple structure in which the first tilt direction T and the second tilt direction P are set opposite to each other, the index rotation operation in both paths accompanying the reciprocating movement of the piston cylinder 9 can be performed in the same direction.

[Configuration of Example 2]
FIG. 4 shows a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the first tilt direction T is set to be the same as the second tilt direction P.
In the second embodiment, the indexing rotation operation in both the paths associated with the reciprocating movement of the piston cylinder 9 is alternately reversed left and right by a simple structure in which the first inclination direction T and the second inclination direction P are set to be the same. Thus, the rotary table 9 can be swung left and right.

[Configuration of Example 3]
FIG. 5 shows a third embodiment of the present invention. The third embodiment differs from the first embodiment in that the drive shaft 19 is formed in a cylindrical shape and the piston cylinder 20 is formed in a double cylinder shape.
As shown in FIG. 5B, the drive shaft 19 includes a small-diameter portion 19a, a large-diameter portion 19b, and a ring-shaped flange portion 19c formed on the outer periphery of the large-diameter portion 19b. A plurality of (for example, four) through-hole portions 19d are formed in the flange portion 19c at equal angular intervals.

The piston cylinder 20 includes an inner cylinder part 20a, an outer cylinder part 20b, and a disk part 20c that couples both cylinder parts 20a and 20b. The disk portion 20c has a fitting hole 20d corresponding to the through hole portion 19d.
The inner cylinder part 20a of the piston cylinder 20 is disposed concentrically within the large diameter part 19b of the drive shaft 19, and the outer cylinder part 20b is arranged so as to surround the outside of the flange part 19c.

  The columnar pin 21 is inserted into the through-hole portion 19d so as to be slidable up and down, and the lower end portion 21a of the pin 21 is fitted and fixed to the fitting hole 20d. As a result, the piston cylinder 20 can be reciprocated up and down, and the rotation around the axis of the piston cylinder 20 can be transmitted to the drive shaft 19 via the pin 21.

A second engagement portion 11 that slides in contact with the second receiving portion 13 is formed on the inner peripheral surface of the lower end of the inner cylindrical portion 20a, and the first receiving portion 12 is formed on the inner peripheral surface of the upper end of the outer cylindrical portion 20b. A first engaging portion 10 is formed that slides in contact with (see FIGS. 5A and 5C).
For this reason, Example 4 has the same effect as Example 1. In particular, in the fourth embodiment, the first engaging portion 10 is formed in the outer cylindrical portion 20b having a large diameter, and slides in contact with the first receiving portion 12 in the forward path of the piston cylindrical body 20, so that the piston cylindrical body 20 is There is an advantage that the rotary table 8 is easily driven through the pin 21 and the drive shaft 19 in response to a large rotational moment.

[Modification]
(A) In Example 1-3, when the piston cylinder 20 is driven up and down, an escape hole that pushes out air corresponding to the compressed air that alternately flows into the first inlet / outlet portion 1a and the second inlet / outlet portion 1b (see FIG. (Not shown) may be separately provided in the cylindrical column 2. The fluid is not limited to compressed air but may be a gas body such as nitrogen or a liquid such as hydraulic oil.
(B) About the number of the 1st engaging part 10, the 1st receiving part 12, the 2nd engaging part 11, and the 2nd receiving part 13, you may change as desired according to a use condition and the objective.

(C) The inclination angle and the inclination direction of the first engagement inclined portion 10a, the first receiving inclined portion 12a, the second engaging inclined portion 11a, and the second receiving inclined portion 13a are the same as the usage situation and purpose. It may be changed as desired according to the situation.
(D) About each component of the axial drive type indexing apparatus 1, you may form with metal bodies, such as iron, aluminum, or stainless steel, and may form with a plastic material.
(E) This plastic material includes polyoxyacetal methylene (POM), polypropylene, polyvinyl chloride (PCV), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyacetal, polyamide (PA), polycarbonate ( PC), polyphenylene ether (PPE), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene (PE), or syndiotactic polystyrene (SPS) may be used.

(F) A plurality of arc-shaped first undulations are formed as the first curved surface portion on the first engaging inclined portion 10a, and an arc-shaped second undulating portion is formed as the second curved surface portion on the second engaging inclined portion 11a. A plurality may be formed. In this case, in the forward path and the return path in the process in which the piston cylinder 9 reciprocates, the first engagement inclined portion 10a and the first receiving inclined portion 12a slide in a line contact state via the first undulation portion, The 2-engagement inclined portion 11a and the second receiving inclined portion 13a slide smoothly in a line contact state via the second undulating portion.

  In the axial drive type indexing device of the present invention, as the piston cylinder is reciprocated, the indexing rotation operation is performed not only in one way but also in both the forward path and the return path. Can be applied to the machinery industry through the distribution of related parts.

DESCRIPTION OF SYMBOLS 1 Axis drive type indexing apparatus 1a 1st entrance / exit part 1b 2nd entrance / exit part 2 Cylindrical column 5, 19 Drive shaft 5a One end part of a drive shaft 5b The other end part of a drive shaft 8 A rotary table (driven body)
9, 20 Piston cylinder 10 First engaging portion 11 Second engaging portion 12 First receiving portion 13 Second receiving portion 10a First engaging inclined portion 11a Second engaging inclined portion 12a First receiving inclined portion 13a First 2 receiving inclined portion Ks vertical direction N1, N2 axial direction T first inclined direction P second inclined direction

Claims (4)

A cylindrical column having a first inlet / outlet portion and a second inlet / outlet portion to which fluid is alternately pumped,
A drive shaft provided rotatably around the axis in the cylindrical column body, and a driven body attached to one end;
The cylindrical column is provided so as to be able to reciprocate along the drive shaft and to be able to transmit rotation to the drive shaft, and by alternately pumping the fluid to the first inlet / outlet portion and the second inlet / outlet portion. A piston cylinder that receives fluid pressure in the body and reciprocates along the drive shaft;
A plurality of first engaging portions provided intermittently at a predetermined number along the circumferential direction at one end of the piston cylinder;
A plurality of second engaging portions intermittently provided in a predetermined number along the circumferential direction at the other end of the piston cylinder;
A plurality of first receiving portions that are intermittently disposed along the circumferential direction at one end portion of the cylindrical column body, and are set to slidably contact the first engaging portion;
A plurality of second receiving portions provided intermittently along the circumferential direction at the other end portion of the cylindrical column body and set to slidably contact the second engaging portion;
When the fluid is pumped, in the forward path of the piston cylinder, the first engaging portion abuts on the first receiving portion and slides, so that the first engaging portion works as a cam and the first receiving portion. Receiving a rotational force in a circumferential direction from a portion and transmitting it to the piston cylinder, rotating the drive shaft together with the driven body by a predetermined circumferential angle, and in the return path of the piston cylinder, the second engagement When the portion slides in contact with the second receiving portion, the second engaging portion works as a cam, receives a rotational force in the circumferential direction from the second receiving portion, and transmits it to the piston cylinder to drive the drive A shaft-driven indexing device characterized in that a shaft is rotated by a predetermined circumferential angle together with the driven body.   The first engaging portion and the first receiving portion both have a first engaging inclined portion and a first receiving inclined portion that slide in an inclined direction in the same direction with respect to the drive shaft, The second engaging portion and the second receiving portion both have a second engaging inclined portion and a second receiving inclined portion that slide while inclining in the same direction with respect to the drive shaft. The shaft drive type indexing device according to claim 1.   The first inclination direction of both the first engagement inclined part and the first receiving inclined part is set opposite to the second inclination direction of both the second engaging inclined part and the second receiving inclined part. The shaft-driven indexing device according to claim 1, wherein   The first inclination direction of both the first engagement inclined part and the first receiving inclined part is set to be the same as the second inclination direction of both the second engaging inclined part and the second receiving inclined part. The shaft-driven indexing device according to claim 1, wherein

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