DE8700680U1 - Lifting rotary cylinder - Google Patents

Description

' · 4 · till··

• · · t ir I · ·

Description Lifting-rotating cylinder

The innovation relates to a lifting rotary cylinder according to the preamble of claim 1.

Such lifting rotary cylinders are used in the assembly/ Handling and sorting technology required,

where loading, assembly, positioning,

Adjustment and tracking processes are important

A lifting rotary cylinder according to the generic term of

Claim 1 is described in DEOS 1 601 744. The disadvantage of this device is that the piston

can perform an axial movement in any of its possible rotational positions. However, it is often required that the axial movement is only possible in one defined rotational position and that the piston performs a rotational movement over a defined angular range at the end of this axial movement.

This object is achieved with the characterizing features of claim 1. Advantageous embodiments can be found in the subclaims.

Examples of implementation are explained in more detail below using the drawings. They show:

Fig. 1 An axial section of a first embodiment before the start of the axial movement of the piston;

Fig. 2 A section corresponding to Fig. 1 at the end of the axial movement of the piston;

Fig. 3 A cross section through the cylinder;

• * * * · It I It·*·« • · · »1)1 Il «

• · t # to 9 It ·

III» It·

* I MI

·«···· If, I , ,

Fig. 4 An axial section of a second embodiment before the start of the axial movement of the piston;

Fig. 5 A section corresponding to Fig. 4 at the end of the axial movement of the piston and

Fig. 6 A cross section through the cylinder.

The lifting rotary cylinder according to the first embodiment has a cylinder housing 1, which is closed on one side by a cover 2, through which a piston rod 4 of a piston 8 is guided. The opposite side of the cylinder housing 1 is also closed by a cover 3. The piston 8 is recessed between the lower piston side 9 and the upper piston side 10, the recess forming two spaces 11, 12, which are separated from one another by oppositely radially extending wings 5. A first cylinder space 13 is formed between the cover 3 and the lower piston side 9, into which a bore 14 opens. Between the upper piston side 10 and the cover 2 there is a second cylinder space 15, into which the bore 16 opens.

The lower cylinder cover 3 has a circular segment-shaped projection 17 which extends over 180° and runs in the direction of the lower piston side 9. The lower piston side 9 is also provided with a circular segment-shaped projection 18 which runs in the axial direction and extends over approximately 180. In this way, two guide surfaces 19, 20 are formed. The front side of the projection 17 has a segment-shaped cutout 21 which extends over 90° in the embodiment shown.

«· i ill· · <

&bull; III! &psgr;&iacgr;> ···«·· Ii it« &EEgr;·

I which creates a stop 22. The projection 18 Ij ' also has a segment-shaped I . Section 23 on/ which extends over approximately 50°

and forms a stop 24.

; In room 12 a hole 6 opens, while in room

11 a hole 7 opens. The holes 6, 7 are arranged laterally offset from each other in such a way that

·■ the one hole against the one wing 5 and the

■y other hole directed towards the other wing 5

J 1st.

The device works as follows:

jj If pressure is applied to the cylinder chamber via bore 14

I 13, then the piston 8 performs an axial I movement. It moves from the In Flg.

&rgr; 1 shown position Into the position shown in Fig. 2.

't A rotational movement is achieved by touching

% of the two guide surfaces 19, 20 is prevented.

At the end of the axial movement, the stop surfaces 22/ 24 are at the same height. If pressure is introduced into the chamber 12 via the bore 6, the piston 8 rotates anti-clockwise until the two stop surfaces 22, 24 come into contact with each other. Since the segment-shaped cutout 21 extends over 90° and the segment-shaped cutout 23 over 50°, the piston 8 can perform a rotary movement of 140° until the stop surfaces 22, V 24 touch each other.

I The piston 8 is returned to its initial position. I moves/ by applying pressure to the space via the bore 7 I 11 is entered. Then the hole is P 16 the cylinder chamber 15 is pressurized, whereby

k the piston 8 from the position shown in Fig. 2

&bull; III If · ·> ·

is moved back to the position shown in Fig. 1.

The axial movement can also be secured, for example, by an offset pin on the cover 3, which engages in a correspondingly offset hole in the piston rod, which is indicated by the position number 25. If the piston 8 is in the position shown in Fig. 2, then the pin and hole are disengaged.

The stops limiting the rotary movement can also be formed, for example, by stops in the form of radially running screws on the cylinder housing 1, which protrude into the spaces 11, 12 and against which one or the other vane 5 runs. Such a possibility is indicated in Fig. 3 with the position number 26. ■·

In the embodiment shown, the possible angle of rotation of the piston 8 is determined by the angular distance between the stop surfaces 22, 24.

In the embodiment according to Figs. 4 to 6, parts that are the same as in the first embodiment have the same reference numerals. Only the differences from the first embodiment are described below.

The wings 5 are not present, rather the piston rod 4 has a pinion 27 with a spur gear between the two piston rods 9, 10. Another piston rod 28 runs at right angles to the piston rod 4 and has a rack 29 with ring-shaped teeth. A piston 30, 31 is arranged at both ends of the piston rod 28.

l Il Il I I · ·

l I I I I I · ·

I It Il Il '·..·

Il It Il «I "

I I I I t · · ·« 1

These pistons 30, 31 are guided in the cylinder housing 32. This forms the cylinder chambers 33, 34, into each of which a bore 35, 36 opens.

In the position according to Fig. 4, the pinion 27 and rack 29 are disengaged before the axial movement of the piston 8 is carried out. If the cylinder chamber is pressurized via the bore 14, then the piston 4 carries out an axial movement, whereby a rotary movement of this piston is prevented by the guide surfaces 19, 20.

At the end of this axial movement, the guide surfaces 19, 20 are disengaged from one another. In this position, the pinion 27 also engages with the rack 29. If the cylinder chamber 34 is now subjected to pressure via the bore 36, the piston rod 28 moves upwards as shown in Fig. 6, causing the piston 8 to rotate. The piston 8 is returned by first applying pressure to the cylinder chamber 33 via the bore 35, causing the piston 8 to rotate back, then the cylinder chamber 15 is subjected to pressure via the bore 16, so that the piston 8 is moved back to the position shown in Fig. 4.

If the piston rod 28 is extended beyond the cylinder housing 32 on both sides, then it is possible for the housing 1 to execute a linear movement in the direction of the axis of the piston rod 28 during the rotary movement of the piston 8.

«II f 1 I *

* 4 < (III

Claims (8)

1. Lifting rotary cylinder with a piston that can be moved axially in a cylinder housing, which carries out the axial movement when pressure is applied to a first cylinder chamber delimited by a first piston side, and which rotates when pressure is applied to a further cylinder chamber, characterized in that the first cylinder chamber (13) has a first guide (19) running in the axial direction to the first piston side (9) and the first piston side (9) has a congruent guide (20), which engage with one another in a rotationally fixed manner and which have an axial length at which they disengage from one another at the end of the axial movement __ of the piston (8). 2. Lifting rotary cylinder according to claim 1, characterized in that a first radial stop (22) is arranged in the first cylinder chamber (13) and the first piston side (9) has a further radial stop (24), these stops (22, 24) at the end of the axial movement of the piston (8) are at the same height and at an angular distance from each other and at the end of the rotary movement of the piston (8) the further stop (24) comes to rest against the first stop (22). 3. Lifting rotary cylinder according to claim 1 or 2, characterized in that the first guide (19) is formed by a first circular segment-shaped projection (17) on the cylinder cover (3) of the first cylinder chamber (13) and the further guide (20) is formed by a further circular segment-shaped projection (18) on the first piston side (9). &bull;&bull;lt&igr; &bull; · t &bgr;»« · &bull; · · · it > t9*
&bull;&diams; t ^fc · 4. Lifting cylinder according to claim 3, characterized in that the first radial stop (22) is formed by a segment-shaped cutout (21) on the front side of the first projection (17) is formed. 5. Lifting rotary cylinder according to claim 3 or 4, characterized in that the further stop (24) is formed by a segment-shaped cutout (23) on the front side of the further projection (18) is formed. 6. Lifting rotary cylinder according to one of claims 1 to 5, characterized in that the further cylinder space is formed by a first space (11 or 12) located between the two piston sides (9, 10) and delimited by two radial wings (5), and in this space (11) or (12) in the cylinder wall (1) a bore (6) or (7) is provided which is directed towards one of the wings (5). 7. Lifting rotary cylinder according to claim 6, characterized in that the radial wings (5) delimit a further space (12) or (11) located between the two piston sides (9, 10) and this space (12) or (11) in the cylinder wall (1) a further hole (7) or (6) directed towards the other wing (5) is to be provided. 8. Lifting rotary cylinder according to claim 7, characterized in that the first radial stop is formed by at least one projecting pin (26) projecting into one of the spaces (11, 12) through which the wings (S) come into contact. ti I 4 « » t I I « f * I t I l * * &bull; 1*11 I* _* β · ···· &bull; »II I · **· · * t t tttt *««*· &bull; II·· ··* &bull;&bull;III! ft *·* · * · Lifting rotary cylinder according to one of claims 1 to 5, characterized in that the further« cylinder space (33) or (34) is formed by a further cylinder (32), the piston (30) or (31) of which is arranged to be displaceable at right angles to one piston (8), the piston rods (4, 28) of both pistons, which run at right angles to one another, have a toothing (27, 29) and the pinion (27) of one piston (4) at the end of its axial movement comes into engagement with the toothing (28) of the other piston rod (28).