JPH0643302U - Fluid pressure actuator - Google Patents

Abstract

(57) [Abstract] [Purpose] A cylinder chamber is provided inside the body 1, a piston is reciprocally accommodated in the cylinder chamber, a table 4 is arranged outside the body 1, and the table 4 is supported by a guide 7. A fluid pressure actuator that connects the piston and the table 4 via the rod 5 and supplies fluid pressure to the cylinder chamber to reciprocate the piston and the table 4.
The table stopping means should be small and inexpensive, easy to machine, and easy to achieve high precision. [Structure] The body 1 is provided with a first overhanging portion 13, the table 4 is provided with second and third overhanging portions 14 and 15 so as to sandwich the first overhanging portion 13, and table stop means is provided for these overhanging portions 13. , 14, 15 are brought into contact with each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvements in fluid pressure actuators.

[0002]

[Prior art]

 A known fluid pressure actuator uses a shock absorber as a table stopping means as described in Japanese Utility Model Laid-Open No. 61-191560.

[0003]

[Problems to be solved by the device]

 Therefore, there is a problem that the product is large and expensive, and that the assembling work for attaching the shock absorber to the table afterwards requires high accuracy, which is a problem. Further, since the shock absorber is arranged far away from the thrust center of the piston, a large moment acts on the table when the shock absorber operates, and the stop position of the table may be displaced. The moment M is expressed by the equation M = L × F ... A where L is the distance between the shock absorber and the thrust center of the piston and F is the thrust of the piston.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised in order to solve the problems found in the above-mentioned prior art, and in order to achieve this object, as shown in claim 1, a cylinder is provided inside the body. A chamber is provided, a piston is reciprocally accommodated in the cylinder chamber, a table is arranged outside the body, the table is supported by a guide, and the piston and the table are connected via a rod, In a fluid pressure actuator that supplies fluid pressure to a chamber to reciprocate the piston and the table, the body is provided with a first overhang portion, and the table is sandwiched between the first overhang portion and the second overhang portion. And a third overhanging portion, and table stopping means for contacting the overhanging portions with each other is provided.

According to a second aspect of the present invention, there is provided a fluid pressure actuator according to the first aspect, characterized in that the projecting portion is provided with a table stroke adjusting means formed of a screw bolt. To do. According to a third aspect of the present invention, there is provided the fluid pressure actuator according to the first aspect, characterized in that the table stopping means is arranged beside a thrust center of the piston.

[0006]

[Action]

 Each of the first to third overhanging portions is a protrusion provided on the body or the table, and such a protrusion having a simple structure constitutes a small and inexpensive table stopping means. The simple structure also means that processing is easy and high precision can be easily achieved.Therefore, even when the overhanging part is molded separately from the body or table and subsequently mounted, high precision is required for assembly. Is easy to produce (Claim 1).

Further, by providing the table stroke adjusting means composed of a screw bolt on the projecting portion, it is possible to arbitrarily adjust the stop position of the table in addition to simply stopping the table (claim 2). Further, by disposing the table stopping means beside the thrust center of the piston, it becomes possible to reduce the distance L and the moment M in the formula A (claim 3).

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, a cylinder chamber 2 is provided inside a body 1, and a piston 3 is reciprocally housed in the cylinder chamber 2. A table 4 is arranged outside the body 1, and the piston 3 and the table 4 are connected via a rod 5 and a tip block 6 on the moving side. The table 4 and the tip block 6 may be integrated. The table 4 is reciprocally supported in the same direction as the piston 3 by means of a guide 7 consisting of a combination of a linear guide 8 fixed to the lower surface of the table 4 and a guide rail 9 provided on the upper surface of the body 1. There is. The tip block 10 on the fixed side is fixed to the body 1, and a pair of pressure supply ports 11 and 12 are opened in the tip block 10. The body 1 and the tip block 10 may be integrated. When fluid pressure such as compressed air is alternately supplied to the front and rear of the piston 3 in the cylinder chamber 2 from the pressure supply ports 11 and 12, the piston 3 reciprocates, and the table 4 is moved through the rod 5 and the tip block 6. It reciprocates following.

A first overhanging portion 13 is integrally formed on the upper surface of the body 1 toward the upper side, and the second and third overhanging portions 14, 15 are formed on the side surface of the table 4 so as to sandwich the first overhanging portion 13. Table extension means is integrally formed toward one side, and these projecting portions 13, 14, and 15 constitute table stopping means for stopping the movement of the table 4. Further, screw-in bolts 16 and 17 are respectively screwed into the second and third overhang portions 14 and 15, and the screw-in bolts 16 and 17 constitute table stroke adjusting means for adjusting the stroke of the table 4. 18 and 19 are lock nuts. Further, the table stopping means composed of the overhanging portions 13, 14, 15 is arranged almost directly above the cylinder chamber 2, that is, beside the thrust center of the piston 3.

The fluid pressure actuator having the above-described configuration is, for example, one in which the body 1 is fixed to a pedestal (not shown) and a machine tool (not shown) is mounted on the table 4 to move the machine tool back and forth. Therefore, the movement of the table 4 is stopped by the table stopping means including the overhanging portions 13, 14, and 15. The projecting portions 13, 14 and 15 are convex portions integrally projecting on the body 1 or the table 4, and the table stopping means is constituted by such a convex portion having a simple structure. In addition, it has the features of being small and inexpensive, and of being easy to machine and highly accurate. Further, since the table stroke adjusting means composed of the screw-in bolts 16 and 17 is provided in the overhanging portions 14 and 15, the stop position of the table 4 can be arbitrarily adjusted by adjusting the screw-in amount. Further, since the table stopping means composed of the overhanging portions 13, 14, 15 is arranged beside the thrust center of the piston 3, it is possible to reduce the distance L and the moment M in the above formula A, thereby stopping the table 4. The position can be prevented from shifting.

The fluid pressure actuator having the above structure may be modified in the following structure. a) As shown in FIG. 4, the shock absorbing members 20 and 21 that absorb the shock at the time of contact are attached to the first overhanging portion 13. b) As shown in FIG. 5, the shock-absorbing members 20 and 21 that absorb the shock at the time of contact are attached to the screw-in bolts 16 and 17. Urethane rubber is preferably used as the material of the shock absorbing parts 20 and 21 in common with the items a and b. c) The screw-in bolts 16 and 17 have a large-diameter head as shown in FIGS. 1 to 5, but do not have a large-diameter head as shown in FIG. Is also good. d) The overhang portions 13, 14, 15 may be formed separately from the body 1 or the table 4. In FIG. 7, as an example thereof, the first overhanging portion 13 is separate from the body 1 and is fixed to the bolt 22.

[0013]

[Effect of device]

 The present invention has the following effects. That is, since the table stopping means is configured by the projecting portion having a simple structure, the table stopping means can be made smaller and less expensive than the prior art. Further, the processing is easy and high precision can be easily obtained (Claim 1). Further, since the table stroke adjusting means composed of screwed bolts is provided in the overhanging portion, the stop position of the table can be arbitrarily adjusted (claim 2). Further, since the table stopping means composed of the overhanging portion is arranged beside the thrust center of the piston, it is possible to reduce the moment and prevent the stopping position of the table from shifting (claim 3).

[Submission date] April 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

[Prior art]

Known hydraulic actuator, as described in Japanese Utility Model 61-1915 06 discloses, is a table stop means have a shock absorber.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

As shown in FIGS. 1 to 3, a cylinder chamber 2 is provided inside a body 1, and a piston 3 is reciprocally housed in the cylinder chamber 2. A table 4 is arranged outside the body 1, and the piston 3 and the table 4 are connected to each other via a rod 5 and a moving-side tip block 6. The table 4 and the tip block 6 may be integrated. The table 4 is reciprocally supported in the same direction as the piston 3 by means of a guide 7 formed by a combination of a linear guide 8 fixed to the lower surface of the table 4 and a guide rail 9 provided on the upper surface of the body 1. There is. A fixed side piping block 10 is fixed to the body 1, and a pair of pressure supply ports 11 and 12 are opened in the piping block 10. The body 1 and the piping block 10 may be integrated. When fluid pressure such as compressed air is alternately supplied to the front and rear of the piston 3 in the cylinder chamber 2 from the pressure supply ports 11 and 12, the piston 3 reciprocates, and the table 4 is moved via the rod 5 and the tip block 6. It reciprocates following.

[Brief description of drawings]

FIG. 1 is a perspective view of a fluid pressure actuator according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the actuator.

FIG. 3 is a perspective view showing the operation of the actuator.

FIG. 4 is a partial plan view of a fluid pressure actuator according to another embodiment of the present invention with a main portion cut away.

FIG. 5 is a partial plan view of a fluid pressure actuator according to another embodiment of the present invention with a main portion cut away.

FIG. 6 is a partial plan view of a fluid pressure actuator according to another embodiment of the present invention with a main portion cut away.

FIG. 7 is a perspective view of a fluid pressure actuator according to another embodiment of the present invention.

[Explanation of symbols]

 1 Body 2 Cylinder Chamber 3 Piston 4 Table 5 Rod 6, 10 Tip Block 7 Guide 8 Linear Guide 9 Guide Rails 11, 12 Pressure Supply Port 13 First Overhanging Portion 14 Second Overhanging Portion 15 Third Overhanging Portion 16, 17 Screw-in bolts 18, 19 Lock nuts 20, 21 Shock absorbing member 22 Bolts

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[Procedure amendment]

[Submission date] April 20, 1993

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of symbols] 1 body 2 cylinder chamber 3 piston 4 table 5 rod 6 tip block 7 guide 8 linear guide 9 guide rail 10 piping block 11, 12 pressure supply port 13 first overhanging portion 14 second overhanging portion 15 Three overhanging parts 16,17 Screw-in bolts 18,19 Lock nuts 20,21 Impact cushioning members 22 Bolts

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (3)

[Scope of utility model registration request] 1. A cylinder chamber (2) inside a body (1).
Is provided, the piston (3) is reciprocally housed in the cylinder chamber (2), the table (4) is arranged outside the body (1), and the table (4) is supported by a guide (7). Then, the piston (3) and the table (4) are connected via a rod (5), and fluid pressure is supplied to the cylinder chamber (2) to reciprocate between the piston (3) and the table (4). In the fluid pressure actuator to be moved, the first overhanging portion (13) is provided on the body (1).
Is provided, and the first overhanging portion (1
3) The second and third overhanging portions (1
4) (15) is provided, and the overhanging portions (13) (14)
A fluid pressure actuator characterized in that a table stopping means is provided by the mutual contact of (15). 2. The fluid pressure actuator according to claim 1, wherein the overhanging portions (13), (14) and (15) are provided with table stroke adjusting means composed of screw bolts (16) and (17). Fluid pressure actuator. 3. The fluid pressure actuator according to claim 1, wherein the table stopping means is arranged beside the thrust center of the piston (3).