JPH0473001B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a pneumatic or hydraulic type cylinder pipe that is equipped with a cylinder pipe that guides a piston and a holding device that rotatably supports the cylinder pipe. Concerning the working cylinder.

[Conventional technology]

In the already known working cylinders of the above type, a holding device for pivotably supporting the working cylinder is arranged in the area of the axial end of the cylinder and is usually located on the cylinder cover. installed.

In this case, the holding device has an eye which is essentially molded integrally with the cylinder cover or is fixedly attached thereto, into which the pivot can be inserted. This pivot shaft can be supported at both ends, so that the working cylinder can be pivoted about this pivot shaft.

It is also possible to design the pivot shaft as two separate pivot pins, which are integrally molded or fixedly attached to a part of the working cylinder.

However, because the holding device is arranged immovably on the working cylinder, the above-mentioned working cylinders can always only be used in specialized fields of work.

For example, by changing the type of working cylinder, which is conventionally pivotably supported in the area of the cylinder cover,
Providing that the working cylinder is pivotably mounted in its longitudinal center requires considerable effort, if not impracticability. In addition, in order to do this, a new swivel pin must be welded to the outer circumferential surface of the cylinder pipe.
This may cause damage to the cylinder pipe itself.

In addition, in conventional center shaft fixing devices that can securely fix the center shaft to the cylinder, the support bracket must be tightened with strong force in opposition to the tie rod in order to securely tighten and fix it. , the clamping force is obtained by the clamping member, and the clamping force simultaneously acts on the peripheral surfaces of the tie rod and cylinder pipe so that the support brackets can interact with each other, so that as the bracket is tightened, The tie rod begins to bend, and even if the connecting member is released, the holding device is no longer able to move freely in the axial direction of the cylinder pipe.

Also, the strain caused by the strong axial tension exerted by the cylinder or bar can cause damage to the tie rod and the entire cylinder.

Additionally, over-tightening the support bracket can cause actuator malfunction because the thin-walled cylinder pipe is laterally unstable and distorts the internal geometry of the cylinder pipe that guides the piston.

Furthermore, if the screws are not tightened strongly, instability in the circumferential direction is inevitable, and centering of the support bracket on the cylinder is difficult.

[Problem that the invention seeks to solve]

The object of the invention is to provide a pneumatic or hydraulic working cylinder of the type mentioned at the outset with an improvement in which a holding device for pivotably supporting the working cylinder can be mounted on the cylinder at any desired position. The purpose is to make it possible to abut the pipe along its length and to allow it to be easily attached and detached, and by means of this holding device, another working cylinder can also be easily attached later.

[Means to solve the problem]

The present invention solves the above problems, and has a configuration in which a device for axial rotation of a centering member of a holding device cooperates with a tie rod, and the centering member is disposed on a curved holding member. has been done. The longitudinal axis of the centering member is also perpendicular to the longitudinal axis of the tie rod and is offset with respect to the tie rod in the direction of the legs and their free ends. The conical end of the centering member moves over the tie rod circumferential surface as the centering member moves, thereby securing the retaining curve to the tie rod via the centering member.

[Functions and effects of the invention]

By constructing the holding device in the present invention from two parts, it can be attached to any location on the outer peripheral surface of the cylinder pipe. The attachment or detachment operation is easily accomplished by connecting or disconnecting the releasable connection between the two retaining curved members.

After installation, the holding device is reliably centered on the cylinder pipe, so that a perfect pivoting function is guaranteed.

With the holding device of the working cylinder according to the invention, even conventional working cylinders which are not equipped with a holding device for pivotable bearing can be easily retrofitted.

The advantage of the working cylinder according to the invention is that the pivot axis can be changed at will without much effort and expense. Thus, for example, a holding device mounted in the area of the cylinder cover can be moved within a short time into the central longitudinal area of the working cylinder.

It is often necessary to support the working cylinder in its longitudinal center when special working conditions are imposed or when the available space is limited.

The mounting of the holding device hardly interferes with the cylinder pipe itself, and since the holding device is releasably fastened, no special constructional measures are required on the working cylinder itself.

In the holding device of the present invention, when the holding curved member is placed on the cylinder pipe, it is also placed on the tie rod at the same time. By this,
Relative non-rotatability of the holder is obtained and thus
Before the two retaining curved members are fixedly and releasably connected, it is possible to correct the position of the working cylinder in the longitudinal direction, and in that case the relative position of the swivel pin can be changed in the circumferential direction of the cylinder pipe. You won't be disappointed.

According to the invention, centering of the holding device on the tie rod is possible.

That is, when the centering member is twisted in the direction toward the tie rod, the tapered end region of the centering member is brought into contact with the tie rod and tightened between the centering member and the retaining curved member. Further, the holding device can be attached to the cylinder pipe so that the holding curved member contacts only the tie rod and does not contact the cylinder pipe at the same time.

Such an arrangement is particularly advantageous in cases where the cylinder pipe must not be loaded.

〔Example〕

Next, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 shows a working cylinder according to the invention. This working cylinder has a cylinder pipe 1 closed at both ends by two cylinder covers 2 and 3. Also shown in FIG. 1 is a piston rod 4 protruding from the cylinder cover 3.

Both cylinder covers 2 and 3 are attached to the cylinder pipe 1
A bar-shaped tie rod 5 arranged parallel to the vertical axis of
are connected to each other by. A holding device 6 is mounted on the cylinder pipe 1 and the tie rod 5 for pivotally supporting the working cylinder.

In particular, as is clear from FIG. 2, the tie rod 5 is arranged within the range of the outer circumferential surface 7 of the cylinder pipe 1, and is located at a distance from this outer circumferential surface 7 in the radial direction when viewed from the center of the cylinder pipe 1. It occupies a certain position.

In the working cylinder according to the invention, four tie rods 5 are provided which are evenly distributed in the circumferential direction of the cylinder pipe 1.

As is clear from the cross section shown in FIG. 2, these tie rods 5 are located at each corner of an imaginary square or rectangle. Therefore,
A line connecting two tie rods facing each other in the radial direction intersects the center point of the cylinder pipe 1,
It is approximately perpendicular to the longitudinal axis of the cylinder pipe 1.

Each tie rod 5 is inserted into the cylinder cover 2, 3, respectively, as shown by reference numeral 8, or
It's screwed in. For this purpose, each tie rod 5 is provided at both ends with a thread 9 which cooperates with a corresponding internal thread of the tightening screw 10.

Note that, in order to fix the tie rod 5, it is naturally possible to take other equivalent measures.

Next, details of the holding device 6 will be described with reference to FIG.

FIG. 2 shows the state in which the holding device 6 is attached to the working cylinder.

The holding device 6 has two holding curved members 11 and 12 that are substantially U-shaped. The retaining curves 11, 12 therefore each have two legs, the legs of the retaining curve 11 being referenced 13 and 14, and the retaining curves 1
The two legs are designated 13' and 14', respectively.

Moreover, these holding curved members 11 and 12 are
one transverse web 1 each connecting the legs together
5, 15' and one opening area 16, 16' in each retaining curve.

By the way, these holding curved members 11 and 12
is mounted on the cylinder pipe 1 with its opening area 16, 16', so that each opening area 16, 1
6' are located facing each other.

In this state, the free ends 17 and 18 of each leg of the holding curved members 11 and 12 are
9 and 19', and the cylinder pipe 1 is
lateral webs 15 of the holding curved members 11, 12;
15' and legs 13, 13' in a completely coaxial manner.

Lateral web 1 of holding curved members 11, 12
5, 15' have contact surfaces 21, 21' on the inner surfaces 20, 20' facing the cylinder pipe 1. These contact surfaces contact portions 22, 22' of the outer circumferential surface 7 of the cylinder pipe 1. These abutment surfaces 22, 22' are connected to the transverse webs 15,
Viewed in the longitudinal direction of 15', it is arc-shaped, in particular arc-shaped, the contour of which corresponds to the external contour of the parts 22, 22'.

Leg portion 14, 1 on the side facing cylinder pipe 1
The inner surfaces 23 of 3' and 14' have raised contact surfaces 2.
4, 24' are formed. Each contact surface 24, 24' of the two legs of one holding curved member
The distance therebetween is approximately equal to the external dimensions of the cylinder pipe 1.

Therefore, when the holding device 6 is in contact with the cylinder pipe 1, all the contact surfaces 21', 24, 24' of the holding curved member are in contact with the outer surface 25 of the cylinder pipe 1 or a portion thereof. come into contact with

In order to pivotably support the working cylinder in a not shown mounting position, the holding device 6 is provided with pivot pins 27, 27'. These pivot pins 27, 27' are attached to the holding curved members 11, 1
They are located on side surfaces 26, 26' of the two lateral webs 15, 15' that do not face the cylinder pipe 1, and protrude in a direction away from the cylinder pipe 1.

In this case, it is advantageous if both pivot pins 27, 27' are arranged along a common pivot axis 28 passing through the center of the cylinder pipe 1 and intersecting its longitudinal axis. If you do that, both pivot pins 27,
27' will be aligned in the radial direction when viewed from the cylinder pipe 1.

In order to releasably connect the holding curves 11, 12, a connecting element 29, in particular a screw, is provided. Therefore, one of the holding curved members 11
has one perforation 3 on each leg 13, 14.
It has 0.

This perforation 30, for example a perforation, passes through the respective leg in its longitudinal direction and is used to accommodate the coupling element 29. These perforations 30 are preferably parallel to the pivot axis 28 .

In the end surface 19' of the legs 13' and 14' on the opposite side,
A notch 31 with a thread is drilled therein. The coupling member 29 can be screwed into this recess 31 .

For the sake of clarity, only one coupling member 29 is extracted in FIG. 2, and the other coupling member is indicated by a dash-dot line.

Each end face 19, 19' of the leg is provided with a positioning notch 32 in the form of a blind hole, the longitudinal direction of which is parallel to the pivot axis 28.

The facing positioning recesses 32 of the two mutually facing legs are each aligned, so that a positioning member 33 configured as a clamping pin, for example, can be inserted into the positioning recess 32. I can do it.

Also in this case, in order to simplify the drawing, in FIG. 2, the positioning notch 32 and the positioning member 33 are
Shown on one leg only.

Returning to FIG. 1, the retaining device 6 is shown viewed in the direction of arrow I in FIG.

Therefore, the leg portions 1 of the holding curved members 11 and 12
4 and 14', outer surfaces 34 and 34' that do not face the cylinder pipe 1 are shown. As is clear from this figure, each coupling member 29 is connected to the side surface 3 of the curved member facing the cylinder covers 2 and 3, respectively.
They are arranged at approximately equal intervals from 5 and 36.

Each of the two legs touching each other has one
A book positioning member 33 is provided. This positioning member 33 is arranged approximately centrally between the longitudinal axis of the coupling member 29 and one of the curved member side faces 35, 36.

As is clear from the figure, the positioning member 33 is
In the region of the legs 14, 14', between the connecting element 29 and the side surface 35 of the curved element, and also in the area of the legs 13, 13'
is located between the coupling member 29 and the curved member side surface 36.

Of course, it is also possible to arrange the positioning members in other ways, for example, two positioning members can be arranged for each adjacent leg.

Furthermore, according to FIG. 2, in the corner region 37 facing the cylinder pipe 1, between the legs 13, 13', 14, 14' and the transverse webs 15, 15', which are oriented approximately at right angles to each other, A notch 38 is formed which approximately matches the outer contour of the tie rod 5 when viewed transversely to the longitudinal direction.

The longitudinal direction of these notches 38 is
is parallel to or coincides with the longitudinal direction of.

The outline of the notch 38 is approximately equal to the internal outline of the hollow cylinder having a vertical slit cut in half, and is formed in the shape of an arc.

By the way, when the holding curved members 11 and 12 are placed on the cylinder pipe 1, on the one hand, the contact surface 2
1 and 21' are the relevant portions 22 and 21 of the cylinder pipe 1, respectively.
22', and on the other hand, a recess 38 abuts the tie rod 5 and partially surrounds it. Further, when the holding curved members 11 and 12 are screwed together by the coupling member 29, the holding curved member and the cylinder pipe 1 are tightened together, and relative rotation due to cooperation between the notch 38 and the tie rod 5 is achieved. Prevented.

For additional centering of the holding device 6 with respect to the tie rod 5, centering elements 39, for example consisting of threaded pins, are provided in the legs of the holding bends 11, 12.

These centering members 39 are threaded and are therefore threaded in a reciprocating manner in suitable recesses 40, for example boreholes, which are formed through the legs. These centering elements 39 have their longitudinal axis 41 advantageously aligned with the pivot axis 2.
8, and are arranged perpendicular to the longitudinal axis of the cylinder pipe.

Two centering members 39, 3 are provided for each leg 13, 13', 14, 14'.
9' cooperates with tie rods 5 arranged in the corner areas of each leg and of the transverse webs 15, 15'.

In the position of the centering member 39 relative to the corresponding tie rod 5 shown in FIG.
It is slightly offset from the longitudinal axis of the tie rod 5. In this case, the distance between them is approximately equal to the radius of tie rod 5, but it is advantageous to make this distance somewhat larger.

Centering member 3 on the side facing tie rod 5
The end region 42 of 9 is tapered and thus has an approximately conical shape.

The centering member 39 is attached to the outer surface 34, 3 of the leg.
4', when screwing in the direction toward the cylinder pipe 1, the surface 43 of the tapered end region 42
is applied to the area of the outer peripheral surface 44 of the corresponding tie rod 5.

When the centering member 39 is screwed further, the centering member is tightened against the tie rod 5, so that the tie rod 5 is crimped into the notch 38 that receives it. With this configuration, the holding device 6
Centered relative to the working cylinder.

According to FIG. 2, two centering members 39, 39' are assigned to each tie rod 5, and the centering members are arranged one after the other in the longitudinal direction of the cylinder pipe 1.

The longitudinal axis 41 of the centering member 39 extends substantially perpendicular to the longitudinal axis of the positioning member 33 and is located at approximately the same distance from the coupling member 29 as the positioning member 33 .

In order to attach the holding device 6 to the cylinder pipe 1, first the centering member 39 is unscrewed and the tie rod 5 is positioned in the required notch 38.

Next, both the holding curved members 11 and 12 are attached to the cylinder pipe 1 and screwed to each other by the coupling member 29. A positioning member 33 is used for positioning. Centering member 39
is also screwed toward the tie rod 5 and tightened.

The holding device 6 is thus centered on the cylinder pipe 1 as well as on the tie rod 5.

The holding device 6 can be positioned in a particularly simple manner at any point along the tie rod 5 or the cylinder pipe 1.

Therefore, the tightening connection between the centering member 39 and the tie rod 5 is achieved by connecting both the holding curved members 1
Like the bond between 1 and 12, it can be easily dissociated.

The holding device 6 slidably abuts on the working cylinder and can be moved to a desired position in the longitudinal direction of the cylinder pipe 1. Once the desired position has been reached, the holding device 6 is tightened and centered in the manner described above.

Holding curved members 11 and 12 and cylinder pipe 1
The positioning of the holding device 6 is particularly easily achieved if no clamping connection is made between the two. That is, the retaining curves 11, 12 are fixedly connected to each other and are held in position only by the cooperation of the centering member and the tie rod. In this case, in order to shift the holding device 6, it is only necessary to release the centering element.

According to the invention, it is also possible to use the holding device 6 as a so-called "central pivot flange" located in the longitudinal center region of the working cylinder or cylinder pipe.

The working cylinder according to the invention has special applications:
Or it can perform a pivoting movement about its longitudinal center area, as required in limited narrow spaces.

[Brief explanation of the drawing]

FIG. 1 is a side view of a working cylinder according to the invention. FIG. 2 is a cross-sectional view of the working cylinder holding device taken along the line -- in FIG. 1. DESCRIPTION OF SYMBOLS 1... Cylinder pipe, 2, 3... Cylinder cover, 4... Piston rod, 5... Tie rod, 6... Holding device, 7... Outer circumferential surface, 8... Insert or insertion part, 9... Thread, 10... Tightening screw, 11, 12... Curved member for holding, 13, 1
4, 13', 14'... Leg portion, 15, 15'... Lateral web, 16, 16'... Opening range, 17,
18...Free end, 19, 19'... End surface, 20,
20'... Inner surface, 21, 21'... Contact surface, 22,
22'...Abutting portion, 23...Inner surface, 24,2
4'...Abutment surface, 25...Outer surface, 26, 26'...
...Side surface of transverse web, 27, 27'...Swivel pin, 28...Swivel axis, 29...Connection member, 30
...Drilling part, 31...Notch, 32...Positioning notch, 33...Positioning member, 34, 34'...Outer surface of leg, 35, 36...Side surface of curved member, 37...
... Corner range, 38 ... Notch, 39 ... Centering member, 40 ... Notch, 41 ... Vertical axis line, 4
2... end range of 39, 43... surface, 44...
Outer surface.

Claims (1)

[Scope of Claims] 1 (a) A cylinder pipe 1 having a piston inside; (b) The cylinder pipe 1 is covered at both ends with cylinder covers 2 and 3, which are covered with a plurality of tie rods. 5, the tie rods 5 are arranged in the area of the outer peripheral surface 7 of the cylinder pipe 1 and extend parallel to the longitudinal axis of the cylinder pipe 1; A holding device 6 is provided for pivotably supporting the working cylinder, which holding device has two legs 13, 14; curved member 11,
12 and transverse webs 15, 15' interconnected to said two legs;
(d) The holding curved members 11, 12 having opening areas 16, 16' facing each other are provided with opening areas 16, 16' facing each other. 5 is provided on the working cylinder in such a way that it is surrounded by the holding device 6, whereby the two holding curved members 11, 12 are connected by means of a screw-like coupling member 29. , the leg portion 13,1
(e) the transverse webs 15, 15' of the retaining curved members 11, 12 are attached to the cylinder pipe 1; On the facing inner surface 20, 20' it has a cutout 38 with a contour adapted to the contour of the tie rod 5, which prevents the retaining device 6 from rotating relative to the cylinder pipe 1. (f) the holding device 6 is adapted to be at least partially received in the notch 38;
(g) The device for axially fixing the centering member 39 of the holding device 6 is connected to the tie rod 5. (h) said centering member 39 is arranged on said retaining bends 11, 12 and is thereby threadably guided into a recess 40 in said bends; (li) The vertical axis 41 of the centering member 39 is
The longitudinal axis 41 is perpendicular to the longitudinal axis of each tie rod 5, and for that tie rod the longitudinal axis 41 extends in the direction of the free ends 16, 17 of the legs 13, 14, 13' and 14'. , are offset by a certain amount, and (v) said centering member 39 has a conical end region 42, said conical end region 42 defining said centering member 39 in the direction of said respective tie rod 5. As each centering member 39 moves, it moves over the outer circumferential surface 44 of said tie rod 5, thereby causing each tie rod 5 to fit into said notch 38, so that said retaining curved member 1
1 and 12 are fastened to the tie rod 5 via the centering member 39; However, the holding curved member 11,
A pneumatic or hydraulic working cylinder characterized in that there is no direct tightening relationship between the cylinder pipe 1 and the cylinder pipe 1. 2 The tie rod 5 is connected to the cylinder pipe 1
The working cylinder according to claim 1, wherein the working cylinder is arranged with a radial gap from the outer peripheral surface of the working cylinder. 3. The working cylinder according to claim 1 or 2, characterized in that it has four tie rods arranged evenly along the outer circumferential surface of the cylinder pipe 1. 4. The centering member 39 is connected to the leg portions 13, 14, 13' of the holding curved members 11, 12,
and 14', the working cylinder according to any one of claims 1 to 3. 5. Working cylinder according to any one of claims 1 to 4, characterized in that each tie rod (5) is provided with at least one centering member (39). 6. Each of the tie rods 5 is provided with two centering members 39, 39', which are continuous in the longitudinal direction of the cylinder pipe 1. The working cylinder according to any one of items 5 to 6. 7 The vertical axis 41 of the centering member 39 is
By a distance approximately equal to the radius of the tie rod 5,
7. A working cylinder according to claim 1, wherein the working cylinder is offset with respect to the longitudinal axis of the tie rod. 8 The inner surfaces 23 of the legs 13, 14, 13' and 14' of the holding curved members 11, 12 facing the cylinder pipe 1 are provided with contact surfaces 24, 24' for abutting against the cylinder pipe 1. A working cylinder according to any one of claims 1 to 7, characterized in that a working cylinder is provided. 9. On the inner surfaces 20, 20' of the lateral webs 15, 15' of the U-shaped retaining curved members 11, 12 in the direction of the cylinder pipe 1, the inner surfaces 20, 20' of the U-shaped retaining curved members 11, 12 can be abutted against the outer circumferential surface 7 of the cylinder pipe 1. Contact surface 2
1, 21' is provided. The working cylinder according to any one of claims 1 to 8.