DE29616292U1 - Rotary actuator - Google Patents

Description

Rotary actuator

The invention relates to a rotary actuating device on a gearbox of a window, a door or the like with an actuating shaft used for positive coupling with a drive element, such as a pinion of an edge gear, a detent spring, a radially inner and a radially outer guide sleeve, wherein the actuating shaft, which is square in cross section, carries a pin mounted transversely to the longitudinal direction near its free end, which is spring-loaded, and wherein the pin detent in or behind the drive element and serves to axially fix the rotary actuating device, wherein the radially inner and the radially outer guide sleeve are axially penetrated by the square, wherein the radially outer guide sleeve is connected to the gearbox and the radially inner guide sleeve is connected to the actuating shaft in a rotationally fixed manner and wherein the guide sleeves can be rotated relative to one another in the rotary actuating direction and the actuating shaft can be locked in at least one rotational position on the guide sleeves via a rotary detent device, wherein the guide sleeves are constantly acted upon by the detent spring and wherein the outer guide sleeve is held in the pre-assembled state by the pin against the force of the locking spring on the actuating shaft.

Description of the state of the art

A rotary actuator is known in which the pin protruding from the side of the actuator shaft fulfills several functions. It is intended to connect the rotary actuator in the assembled state in an axially immovable manner to the drive element of a gear in order to make the complex fixing of the rotary actuator with a rosette that has to be screwed into the sash frame unnecessary.

The pin is also intended to serve as an axial support for the outer guide sleeve, with the latter partially resting on the pin with its radial inner collar in order to prevent the components from being pushed off the actuating shaft by the spring force of the detent spring, which is already pre-tensioned in the pre-assembled state, in which all components (locking spring, inner guide sleeve and outer guide sleeve) have already been pushed onto the actuating shaft.
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Criticism of the state of the art

However, this rotary actuation device has a significant disadvantage. The pin does not reliably prevent the guide sleeves from being pushed off the actuation shaft by the locking spring in the pre-assembled state, for example if the pre-assembled rotary actuation device is put down roughly. The pin only engages minimally behind the radial inner collar.

This is because the diameter of the radial inner collar of the outer guide sleeve must always be selected to be larger than the length of the diagonal of the cross section of the actuating shaft, since the guide sleeves must be able to be rotated relative to one another and thus the actuating shaft, which is positively connected to the inner guide sleeve, must also be able to be rotated against the outer guide sleeve, and because the dimension 0 by which the pin can protrude beyond the outer edge of the actuating shaft is technically limited to a part of the edge length of the actuating shaft, since the pin must be able to be pressed completely into the actuating shaft when the guide sleeves are pushed onto the actuating shaft and since it must still rest partially in its holder in the extended state in order to be able to absorb the transverse forces with which it is loaded.

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There is a linear relationship between the two decisive sizes, the diameter of the radial inner collar and the length of the pin; the pin can only be lengthened if the edge length of the actuating shaft is increased; this in turn means an increase in the radial inner collar in order to keep the parts rotating against each other. Thus, the distance between the edge of the actuating shaft and the edge of the radial inner collar always increases with the length of the pin or the edge length.

Task

The invention is based on the object of designing a rotary actuating device of the type described above in such a way that the sliding off of the guide sleeves by the detent spring in the pre-assembled state of the rotary actuating device is reliably prevented even in the event of unforeseen loads.

Solution to the task

This object is achieved according to the invention in conjunction with the preamble of patent claim 1 by the characterizing features of patent claim 1.

A preferred embodiment of the rotary actuation device is characterized in that the outer guide sleeve has an inner bead adapted to the square outer contour of the cross section through the actuation shaft in order to obtain a large-area contact with the pin. In order to maintain the function of the rotary actuation handle, the actuation shaft is in the section in which the inner collar in the assembled state of the

Rotary actuation handle rests against it, cylindrical in shape. When assembled, the actuation shaft and inner guide sleeve can be rotated against the outer guide sleeve.
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In a further development of the invention, it is provided that the actuating shaft is cylindrical over a larger section in order to always be freely rotatable against the outer guide sleeve when installed in window profiles of different overlap widths.

A further embodiment of the rotary actuating device is characterized in that the outer guide sleeve has an inner bead which is adapted to the outer contour of an actuating shaft with a polygonal cross-section.

Further details of the invention are described in the drawings using schematically illustrated embodiments.

Here we show:

Figure 1 Side view of the rotary control handle in

pre-assembled condition,

Figure 2 Detail from Figure 1,

Figure 3 Section through Figure 2,

Figure 4 Side view of the rotary control handle in

0 assembled state,

Figure 5 Side view of the actuating shaft.

Figure 1 shows a rotary actuation handle 1 in the pre-assembled state. This essentially consists of a handle 14, which is connected to an actuation shaft 8 in a rotationally fixed and immovable manner.

A locking spring 4, an inner guide sleeve 2 and an outer guide sleeve 3 are pushed onto the actuating shaft 8. The locking spring 4 rests against the handle 14 and presses on the inner guide sleeve 2, which in turn presses against the outer guide sleeve 3. A pin 15 is arranged perpendicular to the longitudinal axis 26 near the free end of the actuating shaft 8. The pin 15 prevents the parts pushed onto the actuating shaft 8 from slipping over its free end.

Figure 2 shows, as section A from Figure 1, the area in which the pin 15 prevents the outer guide sleeve 3 in the pre-assembled state from slipping away in the direction of an arrow 28. The outer guide sleeve 3 rests with an inner bead 5, which is formed on a cylindrical extension 6, on a contact surface 16 of the pin 15. The contact surface 16 rests completely on the inner bead 5.

Figure 3 shows a section along the section line III-III through Figure 2. Here, a contour 7 of the inner bead 5 and a contour 11 of the actuating shaft 8 can be seen, which are aligned with one another. A recess 17 on the contour 7 of the inner bead 5 serves to allow a protrusion 18 on the actuating shaft 8 to pass through the inner bead 5 of the outer sleeve 3 without friction when it is pushed onto the actuating shaft 8. The pin 15 slides with a bevel 19 against a run-in surface 20 during the pre-assembly of the outer sleeve 3 onto the actuating shaft 8 and is pushed back against a pin spring 21 into a pin housing 22 until it has slid past the inner bead 5 and lies with its contact surface 16 against the inner bead 5.

Figure 4 shows the rotary actuating handle 1 in the assembled state. It can be seen that the locking spring 4 is now

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is compressed more strongly and the inner bead 5 no longer rests against the contact surface 16 of the pin 15, but is opposite a cylindrical area 9 in a middle area 25 of the actuating shaft 8. The outer guide sleeve 3 is now supported by cams 24 on a gear 2 3 and the pin 15 engages behind a pinion 10. Depending on the given overlap width 13, the inner bead 5 is located further up or further down in the cylindrical area 9.

When the rotary actuating handle 1 is moved from the pre-assembled to the assembled position, the outer guide sleeve 3 initially engages with its cams 24 in the gear housing 23; then the handle 14 together with the actuating shaft 8 is pressed in the direction of the gear housing 23 against the force of the detent spring 4, which is supported on the gear housing 23 via the inner guide sleeve 2 and the outer guide sleeve 3. During this movement, the pin 15 with its bevel 19 initially comes into contact with the pinion 10 and is thereby pressed back into the pin housing 22 against the pin spring 21, so that it can then pass the pinion 10 and is then pressed out of the pin housing 22 again by the pin spring 21 and engages behind the pinion 10 with its contact surface 16. During this transfer phase, the inner bead 5 of the outer guide sleeve 3 and the cylindrical area 9 of the actuating shaft 8 move continuously towards each other until they face each other in the assembled position and can rotate freely against each other.

Figure 5 shows a simplified side view of the actuating shaft 8 with the cylindrical area 9.

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List of reference symbols

1 rotary actuator

2 inner guide sleeve 3 outer guide sleeve

4 locking spring

5 Inner bead

6 cylindrical extension

7 Contour (of the inner bead 5) 8 Actuating shaft

9 cylindrical area

10 pinions

11 Contour (of the actuating shaft 8)

12 Bead width

13 Overlap width

14 Handle

15 Pin

16 Contact surface

17 Recess 0 18 Elevation

19 Bevel

20 Inlet area

21 Pin spring

22 pin housing

5 2 3 Gearbox housing

24 cams

25 middle area 2 6 longitudinal axis

27 Inner circle

28 Arrow

Claims (4)

Expectations 1. Rotary actuating device on a gearbox of a window, a door or the like with a for positive coupling with a drive element element, such as a pinion of an edge gear, an actuating shaft, a detent spring, a radially inner and a radially outer guide sleeve, whereby the actuating shaft, which is square in cross section, has a transverse to the Longitudinally mounted pin, which is spring-loaded, and wherein the pin engages in or behind the drive element and serves to axially fix the rotary actuating device, wherein the radially inner and the radially outer guide sleeve are guided by the four edge is axially penetrated, whereby the radially outer guide sleeve is connected to the gear and the radially inner guide sleeve is connected to the actuating shaft in a rotationally fixed manner and whereby the guide sleeves in 0 Rotary actuation direction rotatable relative to each other and the actuating shaft can be locked in at least one rotational position via a rotary locking device on the guide sleeves, the guide sleeves being constantly acted upon by the locking spring and the outer guide sleeve in the pre-assembled ted state is held by the pin against the force of the locking spring on the actuating shaft, characterized in that
that the outer guide sleeve (3) has an inner bead (5) with a square recess (7) which corresponds to the contour (11) of a section through the actuating shaft (8) at the point provided with the pin, which is transverse to the longitudinal axis (2 6), and its actuating shaft (8) in a central position area (25) which, when mounted, is on the same J ” level with the inner bead (5) and has a cylindrical region (9). 2. Rotary actuating device according to claim 1, characterized in that the actuating shaft (8) has a cylindrical region (9) whose length corresponds to a multiple of the bead width (12). 3. Rotary actuating device according to claim 1, characterized in that the outer guide sleeve (3) has an inner bead (25) with a polygonal recess (7) in the lower region of its cylindrical extension (6) which corresponds to the contour (11) of a transverse to the longitudinal axis (26) lying section through the actuating shaft (8) at the point provided with the pin. 4. Rotary actuating device according to one of claims 1 to 3, characterized, that the diameter of the cylindrical region (9) is smaller than or equal to the diameter of the inner circle (27) in the cross section of the actuating shaft (8).