JPH0723804U - Fluid pressure actuator - Google Patents

Abstract

(57) [Abstract] [Purpose] If one of the guide function and thrust function is a high-precision off-the-shelf product, it can be used as a part of the component of the fluid pressure actuator. In addition, the material suitable for the function can be selected. A guide rail 4 and a rod are provided between a pair of end members, and a table 32 movably combined with the guide rail 4 and a cylinder body 33 relatively moving along the rod are connected via a connecting fitting 35. Then table 3
2 and the connecting fitting 35 are positioned on two surfaces that are parallel to the relative moving direction of the table 32 and intersect each other, and at least one or both of the table 32 and the connecting fitting 35 and the cylinder body 33 are set in the relative moving direction of the table 32. We decided to position on two planes that are parallel to and intersect each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvements in fluid pressure actuators.

[0002]

[Prior art]

 The applicant of the present application has previously proposed a fluid pressure actuator having a table having both a relative movement guide function and a relative movement thrust function, as disclosed in Japanese Utility Model Laid-Open No. 4-199004.

[0003]

[Problems to be solved by the device]

 However, when one table has two kinds of functions in this way, there is a problem that even if there is a high precision off-the-shelf product for one function, it cannot be used. There is a problem in that it cannot be selected to suit each function.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised to solve the above-mentioned problems in the prior art, and in order to achieve this object, a guide rail and a rod are provided between a pair of end members, A table movably combined with the guide rail and a cylinder body that relatively moves with respect to the rod are connected via a connecting metal fitting, and the table and the connecting metal fitting are parallel to the relative moving direction of the table. And two or more of the table and the connecting metal and the cylinder body are positioned on two surfaces that are parallel to the relative movement direction of the table and that intersect with each other. It was to be.

[0005]

[Action]

 In the fluid pressure actuator of the present invention having the above structure, the table has a guide function for relative movement and the cylinder body has a thrust function for relative movement. Thus, two types of functions are shared one by one. The table and cylinder body are connected via a connecting bracket. When connecting the table and the cylinder body separately, both parts must be connected in parallel and easy in operation. Therefore, in the present invention, first, the table and the connecting metal fitting are positioned on two surfaces which are parallel to the relative moving direction of the table and intersect each other, and then both or one of the table and the connecting metal fitting and the cylinder body are placed on the table. It was decided to position on two planes that are parallel to the relative movement direction of and intersect with each other.

[0006]

【Example】

 An embodiment of the present invention will now be described with reference to the drawings. Fig. 1 is a partially cutaway plan view of the fluid pressure actuator, Fig. 2 is a perspective view, Fig. 3 is an exploded perspective view, and Fig. 4 is a guide rail and a table. It is a side view.

In FIGS. 1 and 2, first, reference numeral 1 is a fixed portion, and the fixed portion 1 has the following configuration.

That is, when the pair of end members 2 and 3 are arranged in parallel to each other, and the guide rail 4 is installed between the pair of end members 2 and 3 so as to be orthogonal to the end members 2 and 3. In each case, the rod 5 is installed in parallel with the guide rail 4. The guide rail 4 is rigidly fixed to the end members 2 and 3 by a plurality of bolts 6. The rod 5 is hollow and is axially divided into two parts, and a piston 9 is sandwiched between the divided bodies 7 and 8.

The divided bodies 7 and 8 of the rod 5 are inserted into the insertion concave portions 10 and 11 provided on the inner side surfaces of the end members 2 and 3 at the axial one end portions 7 a and 8 a, respectively, and the axial direction and the like. The end portions 7b and 8b are inserted into the insertion recess portions 12 and 13 provided on the axial end surface of the piston 9. Although it is not clear from the drawings, the diameter between the inner wall portion (inner peripheral surface) of the insertion recessed portions 10 and 11 of the end members 2 and 3 and the outer peripheral surface of the axial end portions 7a and 8a of the split bodies 7 and 8 is not shown. A gap in the direction is set, and the elastic body 14 made of a rubber-like elastic material having an annular shape is appropriately compressed in the radial direction when it is lowered one step from the inner wall portion (inner peripheral surface) of the insertion recess 10 or 11 to the outer peripheral side. The elastic body 14 elastically supports the split bodies 7 and 8 by the elastic body 14. Further, although it is not clear from the drawing, between the inner wall portion (inner peripheral surface) of the insertion concave portions 12 and 13 of the piston 9 and the outer peripheral surface of the axial other end portions 7b and 8b of the split bodies 7 and 8, A radial gap is set.

Pressure supply ports 15 and 16 are provided on the outer side surfaces of the end members 2 and 3, respectively, so that the pressure supply ports 15 and 16 and the hollow portions 7c and 8c of the split bodies 7 and 8 communicate with each other. , Connection paths 17 and 18 are provided. Further, communication recesses 19 and 20 are provided in the axial end surface of the piston 9 so as to partially communicate with the insertion recesses 12 and 13 so that the hollow portions 7c and 8c communicate with both chambers of the cylinder 34, which will be described later. ing. Further, shock absorbers 21 and 22 are attached to the end members 2 and 3, respectively, which serve as a buffer when the moving portion 31 described later reaches the stroke limit of reciprocation.

In FIGS. 1 and 2, reference numeral 31 is a moving unit, and the moving unit 31 has the following configuration.

That is, the substantially box-shaped table 32 is assembled on the guide rail 4 with high precision with relative movement freely along the longitudinal direction of the guide rail 4 via a linear motion bearing not shown. A substantially box-shaped cylinder body 33 having a built-in cylinder 34 combined with the piston 9 is combined with the rod 5 and the outer circumference of the piston 9 so as to be movable relative to each other. It is connected. The divided bodies 7 and 8 of the rod 5 are inserted into end covers 36 and 37 at both ends of the cylinder 34 so as to be relatively movable.

The table 32 and the cylinder body 33 are connected via a connecting fitting 35 as follows. As shown in FIG. 4, the table 32 has a front surface 32a and a lower surface 32b that are parallel to the relative movement direction of the table 32. The front surface 32a is a vertical surface and the lower surface is a horizontal surface. As shown in FIG. 3, the connecting fitting 35 has a back surface 35 a, and a convex portion 38 is provided on the back surface 35 a so as to project therefrom. Further, it has a pair of seat surfaces 35b parallel to the upper surface 38a of the convex portion 38 on the left and right sides. Further, the cylinder body 33 has a housing recess 39 having a size capable of housing the coupling fitting 35 on its rear surface 33a, and a pair of protrusions 40 are provided on the inner wall of the housing recess 39 so as to project therefrom. Each of the protrusions 40 has a back surface 40a and a bottom surface 40b.

First, the connection fitting 35 is connected to the front surface 32 a of the table 32 by using a plurality of bolts 41 (see FIG. 1 or 2), and at the time of this connection, the back surface 35 a of the connection fitting 35 is in front of the table 32. 32a, and the upper surface 38a of the convex portion 38 is closely contacted with the lower surface 32b of the table 32, whereby the table 32 and the connecting fitting 35 are parallel to the relative movement direction of the table 32 and intersect with each other. It is positioned in. That is, the "two surfaces" are the "first surface" that is a combination of the front surface 32a of the table 32 and the back surface 35a of the connecting fitting 35, and the "first surface" that is a combination of the lower surface 32b of the table 32 and the upper surface 38a of the convex portion 38. Two sides.

Next, on the front surface 32a side of the table 32, the cylinder body 33 is connected to the connecting fitting 35 by using a plurality of bolts 42 (see FIG. 1 or 2). 40a is brought into close contact with the front surface 32a of the table 32, and the lower surface 40b of the projection 40 is brought into close contact with the seat surface 35b of the connecting fitting 35, whereby both the table 32 and the connecting fitting 35 and the cylinder body 33 are attached to the table 32. It is positioned on two planes that are parallel to the relative movement direction and intersect each other. That is, the "two surfaces" are the "first surface" that is a combination of the front surface 32a of the table 32 and the rear surface 40a of the protrusion 40, and the "first surface" that is a combination of the seat surface 35b of the connecting fitting 35 and the lower surface 40b of the protrusion 40. Two sides.

Further, on the front surface of the cylinder body 33, a pair of pressure supply ports 15 and 16 and a pair of pressure supply ports 43 and 44 which are selectively used are provided, and both side surfaces of the cylinder body 33 are respectively provided. A stopper 45 (only one of which is shown in the drawing) that abuts the shock absorbers 21 and 22 is attached.

In the fluid pressure actuator having the above structure, for example, the fixed portion 1 is fixed to a mounting member (not shown), and a work (not shown) such as a machine tool is fixed to the table 32 of the moving portion 31, Upon receiving the supply of fluid pressure such as compressed air, the moving unit 31 linearly reciprocates together with the work. In this case, the guide rail 4 is fixed to the mounting member, and the pair of end members 2 and 3 are suspended in the air while being supported by the guide rail 4. Further, the guide rail 4 supports the table 32, the table 32 supports the cylinder body 33 via the connecting metal fitting 35, and the pair of end members 2 and 3 and the cylinder body 33 form the split bodies 7 and 8 of the rod 5 and the piston. 9 will be supported. On the contrary, the moving portion 31 may be fixed to the mounting member and the fixed portion 1 may be linearly reciprocated.

In any case, the fluid pressure actuator having the above configuration has the following operation and effect.

That is, first, when the table 32 having the guide function for relative movement and the cylinder body 33 having the thrust function for relative movement are separated, there is a case where one of the functions has a high-precision ready-made product. In addition, it can be immediately used as a part of the components of the fluid pressure actuator. Therefore, it is possible to effectively use the off-the-shelf product and reduce the component cost of the fluid pressure actuator. Further, since the materials of the table 32 and the cylinder body 33 can be appropriately selected to suit their respective functions, durability and accuracy can be improved accordingly. .

Secondly, the table 32 and the cylinder body 33, which are separate from each other, are connected to each other via a connecting fitting 35, and the table 32 and the connecting fitting 35 are parallel to the relative movement direction of the table 32 and intersect each other. The table 32 and the cylinder body 33 are positioned on two surfaces which are parallel to the relative movement direction of the table 32 and intersect each other while positioning on two surfaces. Can be connected in parallel, and moreover, both parts 32 and 33 can be connected in parallel easily in terms of work.

Thirdly, even if the divided bodies 7 and 8 of the guide rail 4 and the rod 5 or the piston 9 are not arranged exactly in parallel, the divided bodies 7 and 8 are elastically supported by the elastic body 14. Since the piston 9 is held while being supported by the radial clearance, the moving portion 31 that relatively moves along the guide rail 4 changes the direction of the rod 5 or the piston 9. It is possible to prevent them from being bitten. In addition, this can reduce the dimensional tolerances of related parts, which can improve productivity.

Further, in one fluid pressure actuator, the number of the tables 32 or the number of the guide rails 4 can be arbitrarily increased, and rigidity corresponding to the number can be obtained. FIG. 5 shows a case where the number of the tables 32 is two.

[0023]

[Effect of device]

 The present invention has the following effects. That is, first, when a table with a guide function for relative movement and a cylinder body with a thrust function for relative movement are separated, if there is a high-precision off-the-shelf product for one of these functions, this It is ready for use as part of a pressure actuator component. Therefore, it is possible to effectively use the off-the-shelf product and reduce the cost of parts of the fluid pressure actuator. Further, the materials of the table and the cylinder body can be appropriately selected to suit their respective functions, so that durability and accuracy can be improved accordingly. .

Secondly, the table and the cylinder body, which are separate from each other, are connected to each other via the connecting metal fittings, and the table and the connecting metal fittings are positioned on two surfaces which are parallel to the relative movement direction of the table and intersect each other. At the same time, since the table and / or the connecting fitting and the cylinder body are positioned on the two surfaces that are parallel to the relative movement direction of the table and intersect with each other, the table and the cylinder body are parallel, and the operation is easy. Can be connected.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the fluid pressure actuator.

FIG. 3 is an exploded perspective view of the fluid pressure actuator.

[Fig. 4] Side view of the guide rail and the table

FIG. 5 is a perspective view of a fluid pressure actuator according to another embodiment of the present invention.

[Explanation of symbols]

 1 Fixed part 2, 3 End member 4 Guide rail 5 Rod 6, 41, 42 Bolt 7, 8 Divided body 7a, 8a Axial one end 7b, 8b Axial other end 7c, 8c Hollow part 9 Piston 10, 11 Insert Recesses 12,13 Recesses for insertion 14 Elastic bodies 15,16,43,44 Pressure supply ports 17,18 Connection paths 19,20 Recesses for communication 21,22 Shock absorber 31 Moving part 32 Table 32a Front face 32b, 40b Lower face 33 Cylinder body 33a, 35a, 40a Rear surface 34 Cylinder 35 Connecting fitting 35b Seating surface 36, 37 End lid 38 Convex portion 38a Upper surface 39 Housing recess 40 Protrusion 45 Stopper

Claims (1)

[Scope of utility model registration request] 1. A table (3) which is provided with a guide rail (4) and a rod (5) between a pair of end members (2) and (3), and is movably combined with the guide rail (4).
2) and a cylinder body (33) that moves relative to the rod (5) are connected via a connecting fitting (35), and the table (32) and the connecting fitting (35) are connected to the table (32). Of the table (32) and / or the connecting fitting (35) and the cylinder body (33) are positioned on two surfaces that are parallel to the relative movement direction of the table and intersect with each other. A fluid pressure actuator characterized by being positioned on two surfaces that are parallel to a relative movement direction and intersect with each other.