JPH10184610A - Fluid driving system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve utilization of space. SOLUTION: This fluid driving system includes an operating cylinder 12 where an actuating piston 12 works in the inside, and also includes an energy storage device having an energy storage spring 24 for pressing fluid in a container device 20. The storage spring 24 can be moved by a movable thrust piece 23, one edge of which is supported by a cylinder housing 11, and the other edge of which surrounds the operating cylinder housing 11. In this case, the container device 20 surrounds the operating cylinder housing 11, and has at least two axial bores 21. A pressure piston 25 is slidably provided in each bore 21, and the thrust piece 23 abuts on one end face of the piston 25, and a pressure medium acts on the other end face thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fluid driving device according to the preamble of claim 1.

[0002]

2. Description of the Related Art Such a driving device is, for example, an EP 0
451 724 B1.

In this drive device, the energy source is a disk spring device, and this spring force acts on a piston sliding in a pressure cylinder. A pressure medium chamber is provided on the opposite side of the disk spring. The drive piston for the switch is located beside the pressure cylinder. Therefore, this device requires a relatively large space.

In the drive device disclosed in EP 0 158 054 B1, the spring device acts on the piston via a connecting rod. Since the driving piston rod is contained in the piston, a relatively small space is required. The pressure cylinder, drive piston rod, drive cylinder chamber and spring device are on one shaft.

[0005]

The object of the invention is to improve the use of space in the device described at the outset.

[0006]

This object is achieved by the features of claim 1.

[0007]

DETAILED DESCRIPTION OF THE INVENTION In accordance with the present invention, a container device has at least two axial bores, in each of which a pressure piston is slidably mounted, the pressure pistons being slidable. A thrust piece abuts on one end face, and a pressure medium acts on the other end face.

Preferably, there are three axial bores in which the pressure piston slides.

In the first example, the container device comprises an annular container body which concentrically surrounds the working cylinder.

For the purpose of fixing, a flange rim is formed on the working cylinder housing and engages a recess on the container body, so that the container body is pressed against the flange rim by a spring device.

In this case, a pump is built into the container body for pressurizing the pressure medium.

In another example of the present invention, the container device includes a plurality of containers corresponding to a plurality of bores. If there are three bores, three containers are provided, which are equally distributed around the cylinder body and fixed.

The cylinder body may have a hexagonal shape, and the fluid member may be fixed to a hexagonal surface located between the containers.

[Operation / Effect] With the configuration of the present invention, the space can be effectively used.

The spring acts on the pressure piston without the intervention of a rod. Therefore, no seal is required in the area of the tie rod. Energy is supplied to the working piston over a short distance. The pressure piston is located substantially above the working piston.

Further, assembly and maintenance are easy.
Because the container is modular and can be easily replaced. The cylinder body may be made of drawn or forged material, and the individual containers of the pressure piston may be made of semi-finished aluminum.

Further preferred configurations of the invention result from the subclaims.

Embodiments The present invention and further preferred configurations and improvements will be described in detail with reference to the drawings. In this, two embodiments are described.

The fluid drive 10 has a cylinder 11 for a working cylinder 12. A working piston (also referred to as a driving piston) 13 is guided in the cylinder. A drive piston rod 14 is combined with the working piston 13, whereby the high-pressure breaker is operated.

The damping members 16 and 17 are located at the start and end points of the operation of the driving piston or working piston 13.
There is. An area 18 enters the damping member 16 and an area 19 larger in diameter than the drive piston rod 14 enters the damping member 17 to dump the working piston 13 at the beginning and end of its movement.

A large-diameter container body 2 is mounted on the cylinder 11.
0 are combined and there are three bores 21 in this body.
(Only one of them is visible). These three bores are equally distributed around a central axis MM of the fluid drive.

The retaining ring 22 is provided in the cylinder housing 1
1 and is fixed to the cylinder housing 11.

The cylinder housing 11 is surrounded by a thrust ring 23. This thrust ring 23
It is movably guided on the outer surface of the cylinder housing 11.

For example, EP 0 451 724 B1
A spring device 24 is provided between the thrust ring 23 and the retaining ring 22, corresponding to the spring device of the fluid drive device disclosed in US Pat.

A pressure piston 25, which is moved in the direction of arrow D by a spring device 24, is integrated in the bore 21. A pressure medium chamber 26 is provided on the opposite side of the thrust ring 23 of each pressure piston 25. The pressure medium is supplied into the pressure medium chamber 26 by a pump 27 driven by a motor 28 via a line 29 and the working cylinder 12 and lines 30 and 31. Thus, the pressure piston 25 is pushed out in the direction opposite to the arrow D to bias the spring device 24.

The lines 29, 30, 31 are made in the container 20. The line 30 is connected to a P port of a switching valve 32 having a switching slide 33. The switching slide 33 is driven by solenoids A and E in the directions of switch-off and switch-on, respectively.

Line 3 connected to T port of switching valve 32
Via 4, the pressure medium is supplied to a low-pressure tank 36 through a filter 35. From here, the pressure medium is supplied by the pump 27 to the working piston and working cylinder 12.

The line 30 is connected to a line 38 connected to the P port of the switching valve 32. The Z port of the switching valve is connected via a line 39 to a chamber located on the large piston face side of the cylinder 12.

FIG. 1 shows that the switch is in a switch-off state.

To turn on the switch 15,
The pressure medium is supplied via the pump 27 and the line 39, a spring device, with the switching valve 32 in the appropriate position and the operating piston 13
Sent to both sides. In this case, since the area of the working piston 13 on the side where the piston rod 14 is connected is smaller than the opposite side, the working piston 13 and the piston rod 1
4 is moved upward, closing switch 15.

To turn off the switch 15,
The connection between the lines 39 and 34 and the low-pressure tank 36 is connected via the switching valve 32. Thus, the pressure on the side with the larger piston area is reduced. This causes the pressure medium on the side with the smaller piston area to place the working piston in the off position.

The pressure medium is provided by a pump and an energy source. This energy source is formed by a spring device 24 and three pressure pistons 25 in bore 21. Then, the pressure medium in the chamber 26 operates the working piston as described above.

FIG. 2 is a cross-sectional view showing details of the fluid driving device without a spring.

The cylinder body 11 includes an operating cylinder 12
And an operation guided in the working cylinder 12 and a driving piston 13.

The retaining ring 22 is fixed on the cylinder body 11 by a threaded bush 40 having a step 41. In this step 41, the holding ring 22
The upper step 42 is in contact. Threaded bush 40
Are screwed into the outer screw 43 of the cylinder body 11.

The working cylinder 12 is closed by a closing member 44 having a blind hole 45 which is a part of the cylinder body 11. A plurality of lateral bores 46, 47 are provided on the closure member 4.
Opened to 4. Lines corresponding to lines 39 and 29 (labeled 48 and 49 in this figure) are opened in these bores 46 and 47 and are parallel to the working cylinder 12.

A container body, container 50, is arranged around the opposite end of the cylinder body 11. The container main body 50 corresponds to a container housing having the bore 21 in which the pressure piston 25 is incorporated and the container main body 20. A thrust piece 23 is provided between the holding piece 22 and the container housing 50, and a spring device 24 is provided between the holding piece 22 and the thrust piece 23.
(Not shown in FIG. 2).

At the end of the cylinder body 11, at the top in the figure, is a rim 51, which engages in a step 52 on the container housing 50. Then, when all the members are attached and assembled, the spring device is moved to the thrust piece 23.
Via the pressure piston 25 and the pressure medium.
Thus, the step of the housing comes into contact with the flange rim 51, and the container housing 50 is held at a predetermined position.

The chamber 26 is connected through a bore 53 to a bore 54 of the cylinder body 11. The cores of these bores are aligned, extend radially with respect to the cylinder body 11, and open into the working cylinder 12. Line 48 is connected through a transverse bore 55 to a bore 56 leading to the Z port of the switching valve 32. Other bores leading to the P and T ports are not shown in FIG.

A cover 57 in which the filter 35 (not shown) is accommodated is mounted on the upper surface of the container housing 50.

On the piston rod side, the working cylinder 12 is closed by another closing member 58. The piston rod projects outward through the closing member 58, and the cover 5
7 engages the seal 59.

The fluid drive device 70 shown in FIG. 3 has a cylinder body 71, in which
An operating cylinder 72 having an operating piston 73 therein is incorporated therein. The structure and operation of the working piston 73 correspond to those of the working piston 13.

On the side remote from the switch, ie on the bottom,
The cylinder body 71 is fixed by a cover 75,
It is closed by a bush 74.

In the area of the bush 74, ie at the end remote from the switch, the cylinder body 71 has a step 76. As a result, a reduced diameter portion 77 is formed. This reduced diameter portion 7
An external thread 78 is formed on the outside of the sleeve 7, on which the sleeve 8
A zero cylindrical collar 79 is screwed.

The sleeve 80 has two grooves 81 and 82 separated from each other, and force transmitting members 83 and 83a are engaged with these grooves, respectively. Force transmission members 83, 83
a cooperates with the thrust rings 84, 84a. That is,
The force transmitting member 83 includes a bead 85 projecting inward in the radial direction.
Which engages the slot, groove 81. It also has a conical surface 86 on which the force transmitting member 84
Works.

For assembly reasons, the force transmitting member 83 is divided, in particular, into two half rings, which form one ring in the assembled state.

The conical surfaces 87 and 86 are arranged so that the force transmitting member 84 (also called thrust ring) concentrically partially surrounds the force transmitting member 83.

The thrust ring 84 surrounds the outer surface of the sleeve 80. The same effect is achieved with the members 83a, 84a.

The cylinder body 71 has an area 88 above the cylinder body, especially in the end area on the switch side, on its outer side six surfaces 89, 90, 91, 92, 93 and 9
It is a hexagon with four. In FIG. 3, the surface 92 can be seen. Containers 95, 97 and 99 are secured to surfaces 90, 92 and 94 by screw connections 96, 98 and 100, respectively. Containers 95, 97 and 99 have the same configuration.

Therefore, only the container 95 will be described with reference to FIG.

The container 95 has a bottom 101 and a cylindrical wall 102 on the inside, and a rectangular cup on the outside (as seen in FIG. 4).

A bore 103 in which a pressure piston 104 slides is formed inside the wall.

The side of the container 95 remote from the switch is sealed and closed by a cover 105. The cover 105 has a bore 106.
From 6, a piston rod 107 integrally connected to the pressure piston 104 protrudes.

The cylinder body 71 is surrounded by a thrust member 108 having a radial stop surface 109. A disk spring device is between the thrust ring 84 and the thrust member 108. The thrust member 108 is in contact with the piston rod 107. Therefore, when the pressure piston is pushed out of the container 95, the thrust member 1
The spring device is biased via 08.

The thrust member 108 may be a ring, or may have an arm formed integrally with the piston rods 107 of all three containers around the annular portion.

The three containers 95, 97 and 99 are arranged in a star shape on the area 88 of the cylinder body 71. And the three faces 91, 9 between these containers
Other pressure media members may be provided integrally on 3 and 95. For example, the switching valve 110 is on the side surface 91, the travel detector 111 is on the side surface 93, and the low-pressure tank /
The pump device 112 is fixed on the surface 89 (this is
It is just an example).

The operating cylinder 72 is closed by a bush 115 on the switch side, and a piston rod 73a of the working piston 73 protrudes through the bush 115.

Further, a closing cover 116 functioning as a low-pressure tank is provided.

Similarly, bores 117 and 118 functioning as pressure medium lines in the vertical and horizontal directions are provided in the cylinder main body 71.

The details of the thrust ring 84 and the force transmitting member 83 are described in detail in DE... (Mp. NO96 / 663).

[0061]

As described above, the structure of the fluid driving device is simplified. The individual pressure pistons are housed in replaceable containers, and the arrangement shown in FIGS. 3 and 4 is simple and modular, making assembly and maintenance extremely easy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a fluid drive device.

FIG. 2 is a sectional view of the fluid drive device shown in FIG.

FIG. 3 is a sectional view of another example of the present invention.

FIG. 4 is a plan view as seen in the direction of arrow IV in FIG. 3;

[Explanation of symbols]

11 ... cylinder housing, 12 ... working cylinder, 13
... working piston, 15 ... switch, 20 ... container device, 21 ... axial bore, 22 ... holding ring, 23 ... movable thrust piece, 24 ... energy storage spring, 25 ... pressure piston, 32 ... switching valve.

Claims (11)

[Claims] 1. A fluid drive, in particular for a high-pressure circuit breaker, having a working cylinder (12) in which a working piston (13) moves, and a container device (2).
0) has an energy storage device having an energy storage spring (24) for pressurizing the fluid in the storage device, the storage spring (24) having one end supported by the cylinder housing (11) and the other end having A fluid drive surrounding the working cylinder housing (11) and adapted to be moved by a movable thrust piece (23); said container device (20) surrounding said working cylinder housing (11) and at least Two axial bores (2
In each of these bores, a pressure piston (25) is slidably provided, the thrust piece (23) abutting on one end face of these pistons, and the other end face. A fluid drive device characterized in that a pressure medium acts on the fluid drive device. 2. The fluid driving device according to claim 1, wherein a pressure piston is provided in each of the three bores. 3. The container device according to claim 1, wherein the container device includes an operating cylinder (1).
Fluid drive according to claim 1 or 2, characterized in that it comprises an annular container body (20) concentrically surrounding 2). 4. A flange rim (51) is formed on said working cylinder housing (11) and engages in a recess (52) above said container body (50), thus said container body (50). The fluid drive device according to any one of the preceding claims, wherein the spring device (24) is pressed against the flange rim (51) by the spring device (24). 5. The fluid drive according to claim 1, wherein a pump (27) is incorporated in the container body (50) for pressurizing the pressure medium. . 6. The switching valve (32) is connected to a container body (5).
0) and the pump is connected to the bore (21), the switching valve (32) and the piston (1) of the cylinder chamber (12).
Fluid drive according to any one of the preceding claims, characterized in that both sides of (3) are connected via bores provided in the working cylinder housing (11) and the container housing (60). 7. The operating cylinder (1) is provided with a cover (57).
Fluid drive according to any one of the preceding claims, characterized in that it is fixed on a container body (50) substantially flush with the free end of (1). 8. The container device comprises a plurality of containers (95, 99, 100) corresponding to the plurality of bores (13), each of which has a bore, and is provided around a cylinder body (71). The fluid drive device according to claim 1, wherein the fluid drive device is equidistantly fixed. 9. Fluid drive according to claim 8, characterized in that the contact surfaces between the containers (95, 99, 100) are plane and extend axially above the cylinder body (71). apparatus. 10. The cylinder body (71) has a hexagonal shape in the region of the container (95, 99, 100).
Fluid components, such as switching valves, low pressure tanks / pumps and others, are stored in containers (95, 99,
The fluid drive device according to claim 8, wherein the fluid drive device is fixed to a hexagonal face located between the fluid drive devices. 11. Fluid drive according to claim 1, wherein the spring device (24) is constituted by a disc spring.