DE2017464A1 - Liquid-actuated rotary drive - Google Patents

Description

PATENT ADVOCATE '' 4 DOSSELDORF-BENRATH -, -. * -. "- ·! ιαίλ

DIPL-ING. ULRICH PLDGER '' BENEFIT LOCK ALLEEaQ JX. Α _Ρ Γ11

TELEPHONE 713234 PL / Ha

REGISTRATION NUMBER.

SERCK INDUSTRIES LIMITED Warwick Road,

Birmingham 11 / UK

Liquid operated rotary actuator

The invention relates to a liquid operated device Drive for generating a rotary movement.

According to the invention, such a drive should be in a simple manner and particularly reliable execution fora can be created.

This is achieved according to the invention in that it has a housing having a chamber for receiving a rotor, and from which a spindle protrudes, the rotor with a A pair of curved pistons is provided for which a pair of correspondingly curved guide tracks are provided in the housing, in which the pistons can enter with play, and that a pair of rolling bellows are used in the housing, which is in the Spiel'spalt Roll up and down between the pistons and their guideways can, while the angular movement of the rotor in mutually opposite directions by acting on the interior the bellows takes place with hydraulic fluid.

009887/1287

The invention is further illustrated with reference to the drawings. In it:

Fig. 1 shows a cross section of one carried out according to the invention Drive while

Fig. 2 is a partial section along the line 2-2 the figure J reproduces.

The drive shown consists of a housing, which are composed of two identical parts 10 and 11 » which form a chamber. I * housings are two as partial toroids executed tracks 12, 13 for the one to be described below Purpose intended. The two guideways are separated from each other by the radial wall 20 "

A spindle-It * that protrudes on both sides of the housing, is held by camps IS, 18. The spindle carries one Rotor 17, which has swei curved pistons 18 and 19, the can enter the ipisigföradgen Führwngebahnesi 12, 13 "with play ^ tβχ" formation "in a ring-shaped gap.

A pair of rolling bellows 21, 22 are used to form laterally sealed Spaces in the housing 10, 11, in which hydraulic fluid can occur to cause angular movement of the rotor. Each roll bellows is designed with an edge that inside the? A retaining ring 23 is attached to the associated guideway with respect to the partition 20. The wall of the rolling bellows has the shape of a partial ring instead of the The otherwise usual cylindrical Fonaj the flat bottom of the rolling bellows rests on the end of the associated piston. The bellows wall can double within the clearance gap between the piston in question and its guideway.

In Figure 1, the drive is in a limit position of its angle of rotation shown. The wall of the rolling bellows 22 lies in the

009887/1287

essentially not on piston 19, but almost completely the guide way 13. The wall of the rolling bellows 21 is on the other hand on the piston 18 and its guide track 12 in essentially do equal parts.

When pressure fluid acts on the rolling bellows 21, the rotor experiences a de »clockwise counter-clockwise rotation. This counterclockwise movement of the rotor has the consequence that the piston 18 is in the guide track 12 runs back so that the wall of the rolling bellows 21 moves away from the piston and rolls up onto the guide track 12. The piston 19 i increasingly occurs in the guide track 13, whereby the ■ Rolling bellows 22 rolls up from the guide track 13 onto the piston 19.

0 0 9 887/1287

Claims (3)

P a t e η t a η s ρ r Ü c h e Fluid-operated drive, characterized in that it has a housing (10, 11) with a chamber for receiving a rotor (17), and from which a spindle (It) protrudes, the rotor (17) having a pair of curved pistons ( 18, 19), for which a pair of correspondingly curved guide tracks (12, 13) are provided in the housing (10, 11), in which the pistons (18, 19) can enter with play, and that a pair of rolling bellows (21 , 22) are used in the housing, which can roll up and down in the clearance gap between the pistons (18, 19) and their guideways (12, 13), while the angular movement of the rotor (17) in mutually opposite directions by acting on the interior the rolling bellows (21, 22) takes place with hydraulic fluid. 2. Fluid-operated drive according to claim 1, characterized in that the housing (10, 11) has a radial wall (20) separating the guide tracks (12, 13). 3. Liquid-operated drive according to claims 1 or 2, characterized in that the guide tracks (12, 13), the pistons (18, 19) and the rolling bellows (21, 22) are designed as partial rings. 0 0 988 7/1287 Blank page