Source: http://www.google.com/patents/US20040189284?dq=2040248
Timestamp: 2017-10-20 20:05:30
Document Index: 225442832

Matched Legal Cases: ['art 14', 'art 15', 'art 14', 'art 14', 'art 15', 'art 15']

Patent US20040189284 - Actuator element with position detection - Google Patents
An actuator element suitable, for example, for actuating a rotatable disk or a flap valve shaft. The actuator includes a housing, a drive situated in the housing, and at least one position detector, in which a movably mounted piston rod in the housing is operatively connected to the drive for exerting...http://www.google.com/patents/US20040189284?utm_source=gb-gplus-sharePatent US20040189284 - Actuator element with position detection
Publication number US20040189284 A1
Application number US 10/771,143
Also published as DE10304551A1, DE502004000784D1, EP1445494A2, EP1445494A3, EP1445494B1, US7044444
Publication number 10771143, 771143, US 2004/0189284 A1, US 2004/189284 A1, US 20040189284 A1, US 20040189284A1, US 2004189284 A1, US 2004189284A1, US-A1-20040189284, US-A1-2004189284, US2004/0189284A1, US2004/189284A1, US20040189284 A1, US20040189284A1, US2004189284 A1, US2004189284A1
Inventors Thomas Haubold, Dirk Traichel
Patent Citations (47), Referenced by (18), Classifications (9), Legal Events (5)
US 20040189284 A1
a position detector; said position detector comprising at least one stationary Hall sensor and at least one magnet that is movable relative to the Hall sensor in response to motion of the rod and that produces a magnetic field for generating a magnetic flux in the Hall sensor.
5. An actuator element according to claim 1, further comprising at least one flux guide plate arranged adjacent the Hall sensor to amplify the magnetic flux sensed by the sensor, wherein said at least one flux guide plate overlaps the poles of the magnet when the magnet is in a predetermined position.
6. An actuator element according to claim 1, wherein said at least one magnet is disposed on said rod, and the Hall sensor detects a translational change in position of the rod.
7. An actuator element according to claim 2, wherein said at least one magnet is arranged on said rotatable disk, and the Hall sensor detects a rotational change in position of the disk and shaft.
8. An actuator element according to claim 1, wherein the Hall sensor outputs a digital signal for indicating the actuator has attained a predetermined position.
9. An actuator element according to claim 1, wherein the Hall sensor outputs an analog signal for indicating a change in position of the actuator.
10. A modular system for producing actuator elements for driving actuator devices wherein individual parts can be combined freely with one another and actuator elements with or without position detection and with or without conversion of translational force to rotational force are produced by different combinations of parts, said modular system comprising:
a housing with a drive;
at least two rods with means for selective connection to said drive and that are movably guidable in the housing, said at least two rods comprising a first rod bearing at least one magnet and a second rod without a magnet;
at least two rotatable disks with means for selective connection to one of said rods such that translational movement of the rod is converted to rotational movement of the disk, said at least two rotatable disks comprising a first disk bearing at least one magnet and a second disk without a magnet, and
at least one Hall sensor for selective arrangement in a stationary mount in the housing for detecting translational movement of the rod which bears a magnet or for detecting rotational movement of the rotatable disk which bears a magnet.
[0032]FIG. 1 is a schematic view of an actuator element with position detection and force transfer,
[0033]FIG. 2 shows a sectional view of the force transfer according to A-A in FIG. 1,
[0034]FIG. 3 shows a schematic view of an actuator element with position detection without force transfer,
[0035]FIG. 4 shows a schematic view of an enlargement of the position detection device.
[0036]FIG. 1 shows a schematic view of an actuator element 10, constructed in this case as a vacuum actuator element, with a vacuum connection 11 which is connected to a vacuum chamber 12 with a spring 13 disposed therein. The vacuum chamber is formed by a housing top part 14, which is connected to a housing bottom part 15 with a seal. The spring 13 is supported at one end against the housing top part 14 and on the other side against a spring support 16 which is connected to a piston rod 17.
[0043]FIG. 2 shows section A-A as a lateral plan view of the rotatable disk 22. Parts corresponding to FIG. 1 are identified by the same reference numbers. In this view it can be seen that the rotatable disk 22 is situated concentrically on the shaft 23 and is connected to it in a rotationally fixed manner. The connecting pin 20 between the piston rod 17 and the rotatable disk 22 is eccentrically positioned and thus causes the rotatable disk 22 and the shaft 23 which is connected to it, to rotate when the piston rod 17 executes a translational movement.
[0044]FIG. 3 shows a schematic view of a variant of the inventive actuator element 10. Once again, parts corresponding to in FIG. 1 are identified by the same reference numbers. This pneumatic actuator element 10 differs from the actuator element 10 in FIG. 1 in that in this case there is no conversion of the translational movement of the piston rod 17 into a rotational movement of a shaft 23. Another important difference is that in this case only one magnet 25 is provided on the piston rod 17. When the Hall sensor has a digital design, only the end position of the piston rod 17 is detected via the Hall sensor when the actuator element 10 is acted upon by a vacuum. As soon as the magnet 25 is brought into overlapping position with the Hall sensor 26 due to displacement of the piston rod 17 toward the housing top part 14, the Hall sensor outputs a signal that the actuator has reached the end position. The actuator element 10 in FIG. 3 is shown in the second end position of the piston rod 17, which is limited mechanically by the walls of the housing bottom part 15. This is a simple variant of the inventive actuator element. Alternatively, by using a Hall sensor 26 which has an analog output in this arrangement, the position of rod 17 can be detected along its entire course. In this case, the strength of the magnetic field increases continuously up to the end stop in the form in which it is acted upon by a vacuum. If the Hall sensor 26 is suitably programmed and calibrated, even this simple form can achieve a controlled recording of the path of the rod. If it is not possible to mount an enclosed conduit 27 for a cable on the housing due to space reasons, then it is likewise possible with all variants to work with an exposed cable and to arrange the output plug 28 on another component near the actuator element.
[0045]FIG. 4 shows a schematic view of an enlargement of the Hall sensor with flux guide plates mounted on it. Parts that correspond to those in FIG. 1 are identified by the same reference numbers. In FIG. 4 the piston rod 17 moves into the plane of the paper and the system for position detection is shown in a sectional view taken through the Hall sensor 26. It can be seen here that a sensor housing 31 having an output plug 28 has been clipped into a corresponding receptacle on the housing bottom part 15. The Hall sensor 26 and two flux guide plates 30 are embedded in the sensor housing 31. It can be seen here that in this position, the flux guide plates 30 completely overlap the magnet 25 integrated in the piston rod 17. The magnetic flux emitted by the magnet 25 is amplified by the flux guide plates 30 by a factor in the hundreds, thus increasing the sensitivity of the Hall sensors 26 to a change in the magnetic flux to the same extent. Upon movement of the piston rod 17 into or out of the plane of the paper, the resulting change in the magnetic field strength produces a different magnetic induction in the Hall sensor 26 and thus an altered output signal at the output plug 28. The presence of the flux guide plates 30 is optional, however, and is not absolutely necessary for detecting an altered magnetic field strength due to a movement of the piston rod 17. The flux guide plates 30 are used to increase the magnetic field and thus entail the possibility of using a less sensitive Hall sensor 26 with the cost advantages associated with that.
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International Classification F15B15/28, F15B15/10
Cooperative Classification F15B15/2807, Y10T137/8242, F15B15/10
European Classification F15B15/28B, F15B15/10
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAUBOLD, THOMAS;TRAICHEL, DIRK;REEL/FRAME:015422/0575;SIGNING DATES FROM 20040516 TO 20040524