JP2586457Y2 - Fluid pressure actuator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a fluid pressure actuator.

[0002]

2. Description of the Related Art The applicant of the present application has previously disclosed a Japanese Utility Model Application Laid-Open No. 4-199.
As disclosed in Japanese Patent Application Publication No. 04-2004, a fluid pressure actuator having a table having both a function of guiding relative movement and a function of thrusting relative movement has been proposed.

[0003]

[Problems to be Solved by the Invention] However, when two functions are provided in one table as described above, even if there is a high-precision off-the-shelf product for one function, it cannot be used. There is a problem that the material of the table cannot be selected to be suitable for each function.

[0004]

This invention SUMMARY OF THE INVENTION In view of the above points, which has been devised to solve the problems found in the prior art, in order to achieve this object, the guide rail
A table slidably mounted on the table and the table
Connect the fitting to the cylinder body that slides the blue
Fluid actuator coupled through a tape
Of the table, the back of the connection bracket, the bottom of the table and this bottom
Seat, table provided on the connecting bracket so as to face
On the cylinder body so that it faces the front of the cylinder.
The butted butted surface and the intersection with this butted surface
And the seating surface provided on the cylinder body
Each of the seats provided on the connection bracket so as to face
The table and the cylinder body
Are arranged in parallel with each other .

[0005]

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. The table and the cylinder body, which are respectively assigned, are connected via a connection fitting. When connecting the table and the cylinder body separately, both parts must be connected in parallel and easily in operation. For this reason, in the present invention, first, the front of the table, the back of the connecting bracket, and the table
Is provided on the connecting bracket so as to face the lower surface of the
To the table by contacting the seat surfaces
Position the bracket and then the front of the table and this
Butt provided on the cylinder body to face the surface
Surface and the mating surface
And the seat surface provided on the body
Abut the bearing surfaces provided on the connecting bracket
To position the table, the connecting fitting, and the cylinder body .

[0006]

FIG. 1 is a partially cutaway plan view of the hydraulic actuator, FIG. 2 is a perspective view, FIG. 3 is an exploded perspective view, and FIG. 4 is a guide rail. And a side view of the table.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a fixed portion, and the fixed portion 1 has the following configuration.

That is, a pair of end members 2 and 3 are arranged in parallel with each other, and a 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. , A 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 divided into two parts in the axial direction. A piston 9 is sandwiched between the divided bodies 7 and 8.

The split bodies 7 and 8 of the rod 5 are inserted into insertion recesses 10 and 11 provided on the inner side surfaces of the end members 2 and 3 at one end portions 7a and 8a in the axial direction. In the portions 7b and 8b, the pistons 9 are inserted into insertion recesses 12 and 13 provided on the axial end surface. Although not clear from the drawings, a radial direction is provided between the inner wall portions (inner peripheral surfaces) of the insertion concave portions 10 and 11 of the end members 2 and 3 and the outer peripheral surfaces of the axial end portions 7 a and 8 a of the divided bodies 7 and 8. Is set, and the inner wall portions (inner peripheral surfaces) of the insertion concave portions 10 and 11 are set.
An elastic body 14 made of a rubber-like elastic material having a ring shape is interposed in a state where the elastic body 14 is appropriately compressed in the radial direction, so that the divided bodies 7 and 8 are separated from the elastic body 14 by one step toward the outer peripheral side. Are elastically supported. Although not apparent from the drawings, the inner wall portions (inner peripheral surfaces) of the insertion concave portions 12 and 13 of the piston 9 and the other axial end portions 7b and 7b of the divided bodies 7 and 8 are formed.
A radial gap is also set between the outer peripheral surfaces of 8b.

Pressure supply ports 15 and 16 are provided on the outer side surfaces of the end members 2 and 3, respectively, and the pressure supply ports 15 and 16 and the hollow portions 7c and 8c of the divided bodies 7 and 8 communicate with each other. , Connection paths 17 and 18 are provided.
Further, communication recesses 19 and 20 are provided on the axial end surface of the piston 9 so as to partially overlap the insertion recesses 12 and 13, respectively, so that the hollow portions 7 c and 8 c communicate with both chambers of the cylinder 34 described later. ing. In addition, shock absorbers 21 and 22 are provided on the end members 2 and 3, respectively.
Is attached.

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

That is, the substantially box-shaped table 32 is combined with the piston 9 via a linear bearing (not shown) so as to be relatively movable along the longitudinal direction of the guide rail 4 with high precision. Substantially box-shaped cylinder body 33 incorporating a combined cylinder 34
The table 32 and the cylinder body 33 are relatively movably combined with the outer periphery of the rod 5 and the piston 9.
Are connected via a connection fitting 35. The divided bodies 7, 8 of the rod 5 are respectively provided with end covers 36,
37 movably penetrated therethrough.

The table 32 and the cylinder body 33 are connected via a connection fitting 35 as follows. In addition, as shown in FIG. 4, the table 32 has a front surface 32a and a lower surface 32b 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.
a projection 38 is provided on the rear surface 35a.
The upper surface of the convex portion 38a is a first seat surface 38a.
You. The upper surface (first seat surface) 38a of the convex portion 38 is provided on the left and right side portions.
A pair of second seating surfaces 35b are provided in parallel with the second seating surface 35b. The cylinder body 33 has a connection fitting 35 on its back surface 33a.
And a pair of projections 40 protrudingly provided on the inner wall of the accommodation recess 39.
With the back surface of the projection 40 being the butting surface 40a
The lower surface is a third seat surface 40b .

First, a connecting bracket 35 is connected to the front 32a of the table 32 using a plurality of bolts 41 (see FIG. 1 or FIG. 2). 32a, and the upper surface (first seating surface) 38a of the convex portion 38 is closely attached to the lower surface 32b of the table 32.
And the connection fitting 35 are positioned on two surfaces that are parallel to the relative movement direction of the table 32 and intersect with each other. That is, “two sides” is the front face 32 a of the table 32.
And a “first surface” formed by a combination of a back surface 35 a of the connection bracket 35, a lower surface 32 b of the table 32, and an upper surface of the projection 38.
(First seat surface) This is a "second surface" formed by a combination of 38a.

Next, on the front surface 32a side of the table 32, the cylinder body 33 is connected to the connection fitting 35 using a plurality of bolts 42 (see FIG. 1 or 2).
At the time of this connection, the back (butting surface) of the projection 40
0a is in close contact with the front surface 32a of the table 32, and the lower surface (third seat surface) 40b of the projection 40 is
In close contact with the second seat surface 35b of which the table 32
In addition, both the connection fitting 35 and the cylinder body 33 are positioned on two surfaces that are parallel to the relative movement direction of the table 32 and intersect with each other. That is, the “two sides” are the front face 32 a of the table 32 and the back face of the projection 40.
(Abutment surface) "First surface" consisting of a combination of 40a
And the lower surface of the second seating surface 35b of the connection fitting 35 and the projection 40
(Third bearing surface) This is the “second surface” composed of a combination of 40b.

A pair of pressure supply ports 43 and 44 selectively used with the pair of pressure supply ports 15 and 16 are provided on the front surface of the cylinder body 33.
A stopper 45 (only one of them is drawn in the figure) is mounted on each of both side surfaces of the cylinder body 33 to contact the shock absorbers 21 and 22.

In the fluid pressure actuator having the above-described structure, for example, the work 1 (not shown) such as a machine tool is fixed to the table 32 of the moving unit 31 by fixing the fixing unit 1 to an attachment member (not shown). Upon receiving a supply of fluid pressure such as compressed air, the moving unit 31 is linearly reciprocated 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 float in the air while being supported by the guide rail 4. The guide rail 4 is a table 32
, The table 32 supports the cylinder body 33 via the connection fitting 35, and the pair of end members 2, 3 and the cylinder body 33 support the divided bodies 7, 8 of the rod 5 and the piston 9. Conversely, the moving unit 31 may be fixed to the mounting member, and the fixed unit 1 may be reciprocated linearly.

In any case, the fluid pressure actuator having the above configuration has the following functions and effects.

That is, first, since the table 32 having the function of guiding relative movement and the cylinder body 33 having the function of thrusting relative movement are provided separately, there is a high-precision product having one of the functions. In addition, it can be used immediately as a part of the components of the hydraulic actuator. Therefore, the existing products can be effectively used, and the cost of parts of the fluid pressure actuator can be reduced. In addition, since the materials of the table 32 and the cylinder body 33 can be appropriately selected so as to be suitable for the respective functions, the durability and accuracy can be improved accordingly.

Second, when the table 32 and the cylinder body 33 which are separate from each other are connected via a connection fitting 35,
In both cases, the front 32a of the table 32 and the spine
Surface 35a, lower surface 32b of table 32 and lower surface 32b
Of the convex portion 38 provided on the connection fitting 35 so as to face the
The upper surface (first seat surface) 38a and the front surface 32a of the table 32
The cylinder body 33 faces the front surface 32a.
The back (butting surface) 40a of the projection 40 provided,
And this back (butting surface) 40a
The lower surface of the projection 40 provided on the cylinder body 33 (third surface)
Seat surface) 40b and this lower surface (third seat surface) 40b
The second seat surface 35b provided on the connecting bracket 35 as shown in FIG.
The table 32 and the cylinder
Because we decided to arrange D33 in parallel with each other,
The table 32 can be easily operated by simply contacting each surface.
And the cylinder body 33 can be connected in parallel.

Third, even if the divided bodies 7, 8 of the guide rail 4 and the rod 5 or the piston 9 are not arranged exactly in parallel, the divided bodies 7, 8 are elastically supported by the elastic body 14. In addition, since the piston 9 is supported with a play due to the radial gap, the moving portion 31 relatively moving along the guide rail 4 is
Alternatively, the direction of the piston 9 can be changed to prevent the piston 9 from biting. In addition, since the dimensional tolerance of the related parts can be reduced, productivity can be improved.

In one fluid pressure actuator, the number of tables 32 or the number of 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 tables 32 is two.

[0023]

[Effects of the Invention] The present invention has the following effects.

[0024] That is, first, when there is accurate off-the-shelf for one function to the cylinder body and the separate body having a thrust function table and relative movement with the relative movement of the guide function, which Can be used immediately as part of the components of the hydraulic actuator. Therefore, the existing products can be effectively used, and the cost of parts of the fluid pressure actuator can be reduced. Further, since the material of the table and the cylinder body can be appropriately selected so as to be suitable for each function, the durability and accuracy can be improved accordingly. .

[0025] Secondly, with linked via a connecting fitting tables and cylinder body which are separate bodies from each other, tape
The front of the bull and the back of the connection bracket, the table and below
Seat, tape provided on the connecting bracket so as to face the surface
The front and the cylinder body to the counter to so that this front Le
The mating surface provided and the intersection with this mating surface
The seat surface provided on the cylinder body
Each seat surface provided on the connection bracket so as to face the surface
Contact between the table and cylinder body
Are arranged in parallel to each other,
Table and cylinder body with simple work just to make contact
And can be connected in parallel .

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a hydraulic 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 is a side view of a guide rail and a table.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fixed part 2, 3 End member 4 Guide rail 5 Rod 6, 41, 42 Bolt 7, 8 Split body 7a, 8a One axial end 7b, 8b The other axial end 7c, 8c Hollow part 9 Piston 10, 11 Insertion Concave parts 12,13 Insertion concave parts 14 Elastic body 15,16,43,44 Pressure supply port 17,18 Connection path 19,20 Communication concave part 21,22 Shock absorber 31 Moving part 32 Table 32a Front surface 32b Lower surface 33 Cylinder body 33a, 35a Back surface 34 Cylinder 35 Connection fitting 35b Second seat surface (seat surface) 36, 37 End cover 38 Convex portion 38a First seat surface (seat surface) 39 Housing recess 40 Projection 40a Butt surface 40b Third seat surface (seat surface) 45 Stopper

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F15B 15/14

Claims (1)

(57) [Scope of request for utility model registration] 1. A slidable assembly on a guide rail (4).
The found table (32) and the table (32)
To connect the cylinder body (33)
(35) is a fluid pressure actuator connected via
And the front surface (32a) of the table (32) and the connecting bracket (35)
Back surface (35a), and lower surface (32b) of table (32)
And the connecting bracket (3) so as to face the lower surface (32b).
5) The seat (38a) provided on the table (32)
So as to face the front (32a) and the front (32a)
The mating surface (4) provided on the cylinder body (33)
0a), and intersects this abutment surface (40a)
Seat surface (40) provided on the cylinder body (33)
b) and a connecting bracket so as to face the seat surface (40b).
The seat surface (35b) provided on the (35) is
The table (32) and the cylinder body
And (33) are arranged in parallel with each other .