Abstract
A door drive includes a housing and at least one regulating valve for the adjustable regulation of a fluid flow within the door drive. The one regulating valve or at least one of the several regulating valves includes two ends with respectively one engaging part, in particular for a tool, wherein the one regulating valve or the regulating valves extend/s in such a manner through the housing that the engaging parts for adjusting the one regulating valve or the regulating valves may be manipulated from outside the housing.
Claims
1. A door drive including a housing and at least one regulating valve for the adjustable regulation of a fluid flow within the door drive, wherein the at least one regulating valves includes two ends with respectively one engaging part, wherein the at least one regulating valve extends in such a manner through the housing that the engaging parts are manipulatable for adjusting the at least one regulating valve from outside the housing, wherein the at least one regulating valve is disposed in such a manner that, in any mounting position of the door drive, at least one engaging part per regulating valve is accessible for an operator.
2. The door drive according to claim 1, wherein the at least one regulating valve extends in a bearing or in a thread.
3. The door drive according to claim 1, wherein the at least one regulating valve is supported in at least one valve sleeve, wherein the valve sleeve is accommodated in the door drive.
4. The door drive according to claim 3, wherein the at least one valve sleeve includes at least one lateral opening for passing a fluid flow therethrough.
5. The door drive according to claim 1, wherein an orifice is associated with the at least one regulating valve, wherein the at least one regulating valve cooperates with the associated orifice in such a manner that a covering degree of an orifice opening depends on the position of the at least one regulating valve in relation to the position of the orifice.
6. The door drive according to claim 1, wherein the at least one regulating valve includes a first valve piston and a second valve piston, wherein the first valve piston includes the first engaging part and the second valve piston includes the second engaging part, wherein the first valve piston and the second valve piston are movable in relation to each other and/or in relation to the door drive.
7. The door drive according to claim 1, wherein the first valve piston or the second valve piston or at least one of the several first valve pistons or of the second valve pistons includes a right-handed thread and the associated other valve piston includes a left-handed thread, wherein the valve pistons are guided in corresponding right-handed respectively left-handed threads.
8. The door drive according to claim 1, wherein the first valve piston or at least one of the several first valve pistons includes an axially oriented reception compartment and the associated second valve piston at least one regulating pin, wherein the regulating pin projects at least partially into the reception compartment.
9. The door drive according to claim 8, wherein the at least one regulating pin includes a truncated tip, wherein the truncated tip together with the associated reception compartment form an annular gap valve.
10. The door drive according to claim 8, wherein an orifice is disposed between the at least one regulating pin and the associated reception compartment, wherein the covering degree of the orifice opening depends on the position of the first valve piston and/or the second valve piston in relation to the position of the orifice.
11. The door drive according to claim 1, wherein the at least one regulating valve extends essentially vertically to the longitudinal axis of the door drive.
12. A method for adjusting the regulation of a fluid flow within a door drive, wherein the method further includes the following steps: mounting the door drive according to claim 1 to a door, and manipulating one of the engaging parts, by means of a tool.
13. A method for manufacturing a door drive, the method includes the following steps: providing a door drive including a housing for accommodating at least one regulating valve for the adjustable regulation of a fluid flow within the door drive, manufacturing at least one regulating valve, wherein the at least one regulating valve include/s at least two ends with respectively one engaging part, inserting the at least one regulating valve into the housing such that the at least one regulating valve extends in such a way through the housing that the engaging parts for adjusting the at least one regulating valve may be manipulated from outside the housing, and at least one engaging part per regulating valve is accessible for an operator, in any mounting position of the door drive.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Hereinafter, the disclosure will be explained in more detail, on the basis of exemplary embodiments. Technical features having the same function are numbered in the Figures with the identical reference numerals. In the drawings:
(2) FIG. 1 shows diagrammatically an inventive door drive according to an embodiment of the disclosure,
(3) FIG. 2 shows a regulating valve of an inventive door drive according to an embodiment of the disclosure,
(4) FIG. 3 shows a regulating valve of an inventive door drive according to another embodiment of the disclosure,
(5) FIG. 4 shows a first valve piston of a regulating valve of an inventive door drive according to a particularly preferred embodiment of the disclosure,
(6) FIG. 5 shows a sectional illustration of the first valve piston of a regulating valve of an inventive door drive according to a particularly preferred embodiment of the disclosure,
(7) FIG. 6 shows the second valve piston of a regulating valve of an inventive door drive according to a particularly preferred embodiment of the disclosure, and
(8) FIG. 7 shows a regulating valve of an inventive door drive according to a particularly preferred embodiment of the disclosure.
DETAILED DESCRIPTION OF THE DRAWINGS
(9) FIG. 1 shows a door drive 1 with a housing 2. The door drive 1 includes a regulating valve 3 for the adjustable regulation of a fluid flow within the door drive 1. The regulating valve 3 extends in such a manner through the housing 2 of the door drive 1, that the engaging parts 4 for adjusting the regulating valve 3 may be manipulated from outside the housing 2. The engaging parts 4 of the regulating valve 3 are located on opposite sides of the housing 2 such that in FIG. 1 only one engaging part 4 is visible. Via an output shaft 13, the door drive 1 is connectable in a known manner to a force-transmitting element, such as a scissor-arm assembly or a sliding rail.
(10) The regulating valve 3 illustrated in FIG. 2 includes two ends with respectively one engaging part 4a, 4b. The regulating valve 3 is supported in a valve sleeve 6. The valve sleeve 6 includes non-illustrated lateral openings for passing a fluid flow therethrough. The regulating valve 3 is non-positively and/or positively and/or positively by material accommodated in the door drive 1 via the valve sleeve 6. The regulating valve 3 includes a first valve piston 9a and a second valve piston 9b, wherein the first valve piston 9a includes the first engaging part 4a and the second valve piston 9b includes the second engaging part 4b. The first valve piston 9a is movable in relation to the second valve piston 9b. The first valve piston 9a is rotatably supported in a thread 16a. The second valve piston 9b is rotatably supported in a thread 16b. The first valve piston 9a includes a reception compartment 10. The second valve piston 9a includes a regulating pin 11, wherein the regulating pin 11 protrudes into the reception compartment 10. The regulating pin 11 includes a truncated tip 12, wherein the truncated tip 12 together with the reception compartment 10 forms an annular gap valve. Manipulating one of the engaging parts 4a, 4b allows for adjusting a distance between the two valve pistons 9a, 9b. Depending on the distance of the two valve piston 9a, 9b with regard to each other, hydraulic fluid may flow from or into the reception compartment 10 through the annular gap formed between the reception compartment 10 and the truncated tip 12. For this purpose, the reception compartment 10 has a passage 17, which includes a fluid connection to one of the lateral openings of the valve sleeve 6. Analogously, the space around the base of the truncated tip 12 includes a fluid connection to one of the other lateral opening of the valve sleeve. The fluid communications are limited by means of ring-shaped sealing elements 14.
(11) The regulating valve 3 illustrated in FIG. 3 is designed mainly identically to the regulating valve 3 illustrated in FIG. 2, so that the description of FIG. 2 may essentially apply to the FIG. 3. In contrast to the regulating valve 3 of FIG. 2, the regulating pin 11 of the regulating valve 3 of FIG. 3 does not have a truncated tip. The regulating pin 11 includes a bore 19 extending in axial direction. The bore 19 extends from the side of the regulating pin 11 oriented towards the first valve piston 9a as far as into the second valve piston 9b. Thus, the bore 19 is in direct communication with the reception compartment 10. At the end of the bore 19, a transverse channel 20 is disposed, which establishes a fluid communication between the bore 19 and a second lateral opening 18b of the valve sleeve 6. An orifice sleeve 7 is disposed between the regulating pin 11 and the reception compartment 10. The orifice sleeve 7 includes a notch 21 extending in axial direction. The regulating pin 11 partially protrudes into the orifice sleeve 7. The regulating pin 11 bears against the inner walling of the orifice sleeve 7 in a fluid-tight manner. Depending on the distance of the two valve pistons 9a, 9b to each other, the regulating pin 11 does not cover the notch 21, covers it partially or completely. Thus, the regulating pin 11, together with the orifice sleeve 7, forms an orifice valve, which may regulate a fluid flow. One potential path of a fluid through the regulating valve 3 is illustrated by means of the dotted line. In this case, the fluid flows via the first lateral opening 18a, through the passage 17 and the notch 21 past the regulating pin 11 and into the reception compartment 10. From the reception compartment 10, the fluid flows through the bore 19 and into the transverse channel 20 towards the second lateral opening 18b. The reverse flow path is likewise possible.
(12) FIG. 4 shows the first valve piston 9a of the regulating valve 3 illustrated in FIG. 7. The first valve piston 9a includes a first engaging part 4a. The first valve piston 9a includes a reception compartment 10. The engaging part 4a and the reception compartment 10 are disposed at opposite ends of the first valve piston 9a. The first valve piston 9a includes a first thread 16a. By means of the first thread 16a, the first valve piston 9a may be supported to be mobile in a door drive. The first valve piston 9a has two passages 17. A fluid flow to be regulated may flow through the passages 17. The first valve piston 9a includes a catch contour 22. The catch contour 22 is disposed in the frontal area of the reception compartment 10. The catch contour 22 is formed by means of the non-round interior contour of the reception compartment 10.
(13) FIG. 5 shows the already illustrated first valve piston 9a of the regulating valve 3 illustrated in FIG. 7 in a sectional illustration. The reception compartment 10 includes a guiding area 23. The guiding area 23 is disposed in the rear area of the reception compartment. The guiding area 23 is formed by means of a round interior contour with a constant radius of the reception compartment 10.
(14) FIG. 6 shows the second valve piston 9b of the regulating valve 3 illustrated in FIG. 7. The second valve piston 9b includes a second engaging part 4b. The second valve piston 9b includes a regulating pin 11. The engaging part 4b and the regulating pin 11 are disposed at opposite ends of the second valve piston 9b. The second valve piston 9b includes a tip 12. The tip 12 is essentially configured truncated. The tip 12 is disposed at the regulating pin 11. The second valve piston 9b includes a guiding element 24. The guiding element 24 is disposed at the regulating pin 11. The guiding element 24 is disposed at the end of the second valve piston 9b opposite the second engaging part 4b. The guiding element 24 is formed by means of a cylindrical area of the regulating pin 11. The second valve piston 9b includes an engaging element 25. The engaging element 25 is disposed at the regulating pin 11. The engaging element 25 is formed by means of a non-round exterior contour of the regulating pin 11.
(15) FIG. 7 shows an inventive regulating valve 3. The regulating valve 3 includes a first valve piston 9a and a second valve piston 9b. With the non-illustrated tip, the second valve piston 9b extends into the first valve piston 9a. The first valve piston 9a corresponds to the first valve piston 9a illustrated in the FIGS. 4 and 5. The second valve piston 9b corresponds to the second valve piston 9b illustrated in FIG. 6. The illustration of sealing elements has been omitted for better clarity in the FIGS. 4 to 7. The non-illustrated guiding element 24 is guided in the likewise not illustrated guiding area 25. Said guiding reduces the play, which is formed by means of the tip 12 and the reception compartment 10 of the annular gap valve. Thus, the regulating valve 3 may be adjusted more precisely. The engaging element 25 engages into the non-illustrated catch contour 22. The engaging element 25 and the catch contour 22 have corresponding contours. Hereby, the rotary movements between the valve pistons 9a, 9b are transmitted, i. e. the valve pistons 9a, 9b are rotatably coupled. The valve pistons 9a, 9b are movable in longitudinal direction in relation to each other, i. e. the valve pistons 9a, 9b are translationally uncoupled. The first valve piston 9a is supported via the first thread 16a in the non-illustrated door drive. The second valve piston 9b is supported in the door drive exclusively rotatably movably supported about the longitudinal axis thereof. By manipulating one of the engaging parts 4a, 4b, the two valve pistons are rotated in the door drive. Hereby, depending on the direction of movement, the valve pistons 9a, 9b either move towards each other or away from each other. Said translationally relative movement is adjusted by the annular gap valve formed by means of the tip 12 and the reception compartment 10.
