EP1514990A2 - Adjusting device for a vehicle - Google Patents

Abstract

The movable especially window lifting component (1) has a passive sensor portion (12) with teeth (121) mounted on a slider (11). The active sensor (3) has a housing (31) carrying a U-section active sensor (34). The active sensor is mounted on a fixed guide rail assembly (2). An alternative version may use a Hall sensor.

Description

The invention relates to an adjusting device for a motor vehicle for Adjusting a movable element of the adjusting device; the adjustment has a sensor system with at least one active sensor part and at least a passive sensor part. The sensor system is used for measuring or for Determining the position or location of the movable element. Under the active Sensor part is hereinafter understood that part of the sensor system, the one generates analog or digital sensor signal, the position or the location of the indicates immediately movable element or from or with the position or the location of the movable element is indirectly determinable. Under the passive Sensor part is that part of the sensor system understood that a physical quantity - for example, the magnetic field, the electric field or the like in the region of the active sensor part - changed in such a way that this from the active sensor part detected and can be detected to form the sensor signal.

Such adjustment is for example from the international Patent application WO 00/54010 known. In this prior art adjustment is the passive sensor part formed by a magnetic rod, in which the angle of the magnetic field in the longitudinal direction of the rod rotates. By measuring the Direction of the magnetic field with the help of the active sensor part can thus on the close absolute location of the movable element.

The invention has for its object to provide an adjustment, which is as easy and inexpensive to produce.

This object is achieved with an adjusting device of the type described above solved according to the invention by the characterizing features of claim 1. Advantageous embodiments of the invention are specified in subclaims.

Thereafter, the invention provides that the active sensor part arranged stationary and is formed by a capacitive sensor. The passive sensor part forms a Part of the movable element.

Advantageously, the adjusting device is designed such that as active Sensor part, a capacitive sensor is used. Capacitive sensors can be for example, form in the simplest form by only two capacitor plates, so that the active sensor part in the adjusting device according to the invention very is inexpensive to produce.

Advantageously, the passive sensor part is an integral part of the movable Elements, so that the passive sensor part in the production of the movable element "at the same time" can be produced. Preferably, the passive sensor part is on the movable element integrally formed.

If for the location of the movable element digital output signals are to be generated, the passive sensor part preferably has a comb-shaped Profile on the electric field very much when passing by the active sensor part changed abruptly. From the active sensor part are then approximately rectangular Output signals, so thus quasi-digital signals delivered.

If, instead, analog output signals are to be generated, the passive one indicates Sensor part preferably as a capacity-changing profile on a sinusoidal profile.

If the respective "absolute" position of the movable element is to be measured, Thus, the capacitance-changing profile of the passive sensor part can be monotonous have rising or monotonically sloping course. By measuring the electric field strength in the region of the active sensor part or by measuring the Capacity of the active part of the sensor can thus be adjusted to the absolute location of the movable Elements are closed. A rising or falling profile can over it but also for initialization or normalization of the position measuring system or used for synchronization with another relative position measuring system become. In this way, for example, measuring tolerances can be eliminated or at least reduce.

An absolute location measurement using the sensor system is also possible, if the passive sensor part has at least two sensor tracks. By a appropriate coding of the two sensor tracks relative to each other can then on the absolute position of the movable element to be closed.

The profile of the passive sensor part can be particularly cost-effective and simple corresponding configuration of a plastic material may be formed. For example can the plastic material with the given profile on a support member up or be molded, in particular to form a so-called "outsert" part. The Carrier part is preferably made of metal, for example, a flat sheet. Alternatively, the carrier part itself may have a capacity-changing profile, so the carrier part forms its own "sensor track".

Preferably, the active sensor part by means of a clip element on a body-mounted carrier element aufgeklippst. For example, the clip element can be off Plastic be formed. Preferably, the clip element is integral with a Housing of the active sensor part connected to the production costs as low as possible to keep.

To a stop surface for the movable element of the adjustment particularly To be able to make simple and inexpensive, it is according to a training of Adjustment considered advantageous if the housing of the active Sensor part has at least one stop surface for the movable element, to the the movable element strikes in its upper and / or lower end position. at an integration of the stop surface in the housing of the sensor part can thus be dispensed with an additional separate stop.

Preferably, the sensor system has an evaluation device, in particular a Electronic circuit that evaluates the sensor signal of the active sensor part. The Evaluation device is preferably designed such that it from the sensor signal of the active sensor part forms an analog or digital measuring signal, which is the absolute or relative position of the movable element. The evaluation device can be fixed, for example, stationary.

The evaluation device in the housing of the active sensor part is advantageous accommodated, thus saving a separate housing for the evaluation becomes. Preferably, the evaluation device is connected to at least one cable a drive of the adjusting device connected control device of Adjusting device in connection; while the control device is configured in such a way that it evaluates the analog or digital measurement signal of the evaluation and the control of the drive taking into account the absolute or relative Position of the movable element makes. Alternatively, instead of a cable Of course, a radio link between the controller and the Evaluation are used.

If the evaluation device is housed in the wet area of the motor vehicle, it is considered advantageous if the at least one cable and the housing the evaluation device are connected watertight to damage due to moisture avoid. The same applies if the evaluation device in the housing of the active sensor part is housed.

The watertight connection between the cable and the housing of the Evaluation device or the housing of the active sensor part can be inexpensive and thus advantageously be effected by the fact that the housing facing the end of the cable and the housing are molded together with plastic. expensive Wet room plug can be saved.

The passive sensor part can, for example, on a cable drum of a drive system be arranged the adjusting device, regardless of whether it is in the Adjustment device to a window regulator, a seat adjustment, a sunroof or another vehicle component is. The passive sensor part can instead Also be arranged on a pulley over which a flexible traction means, For example, a drive cable is guided.

The adjusting device may in particular be a cable window lifter act. The passive sensor part of the sensor system is then preferably at one Driver for the window of the window lifter attached. The active sensor part is preferably attached to a guide rail of the window regulator.

To attach the driver to the associated guide rail of the Window lift has this preferably in cross-section L-shaped guide slots, through which the associated guide rail is passed.

Preferably, there is a serving for fixing the window glass Attachment area of the driver - in particular, for example, a jaw of the mounting area - made of metal and is by plastic injection with one of the guide rail of the window lift guided sliding area (made of plastic) of the Tied to driver, wherein at the sliding portion of the passive sensor part in one piece is formed. Preferably, the passive sensor part is also made of plastic and is in Frame of Kunststoffumspritzens been formed in forming the sliding portion.

To hold the window pane, the catch is preferably with two clamping jaws equipped, of which at least one by a plastic-coated metal part is formed.

The active sensor part is preferably on the guide rail of the window lifter with clipped on a clip element. The clip element is preferably integral to the Housing of the active sensor part formed.

Incidentally, the passive sensor part may also be in a design or decorative element, In particular, a cover for the drive of the adjusting integrated be. This is especially recommended when it comes to the Adjustment is a Sitzverstelleinrichtung because then, for example, the Seat rail assembly of the vehicle seat by the passive sensor part at least partially covered.

The object of the invention is moreover - this is a second Embodiment of the invention - by an adjusting device with a sensor system solved, in which the adjusting device is a window, at the driver for the Window as a passive sensor part a magnetic field changing element arranged is.

Even such an adjustment can be - as the above already explained first Embodiment of the invention with a capacitive sensor - very simple and manufacture cost, because namely even with this adjustment the passive Sensor part is arranged on the movable member and the active sensor part is fixed to the body.

In this second embodiment of the invention, it will also be advantageous considered when the passive sensor part is an integral part, in particular an integrally formed part of the movable element forms.

The magnetic field-changing "profile" of the passive sensor part can be such be configured so that the active sensor part digital, sinusoidal or monotone Ascending or monotonically decreasing electrical signals generated. The profile can be passively alter the magnetic return flow of an existing magnetic field or instead or in addition generate your own magnetic field. For example, that can passive sensor part for generating a separate magnetic field periodically arranged, equidistant magnetic poles with alternating magnetic field orientation (eg North Pole South Pole North Pole South Pole etc.).

In addition, the magnetic field-modifying element can have two sensor tracks have, so that an absolute location measurement using the sensor system allows becomes.

Preferably, the active sensor part is a magnetoresistive Sensor, in particular a Hall sensor. Preferably, the Hall sensor is biased.

The magnetic field-changing element, for example, designed such that the Magnetic properties vary over the length of the active sensor part such that the radially directed magnetic field lines in the longitudinal direction of the passive sensor part are continuously or segmented angularly aligned.

The passive sensor part is preferably formed by an injection molded part, in which Magnetic material is injected. The magnetic material is, for example, after Injection molding magnetically aligned by an external, strong magnetic field. alternative The magnetic material can be in the passive sensor part as separate parts from the outside be used.

Figuren 1 a bis 1c

ein erstes Ausführungsbeispiel für eine erfindungsgemäße Verstelleinrichtung, und zwar in einer dreidimensionalen Darstellung,

Figur 2

ein Ausführungsbeispiel für ein aktives Sensorteil der Verstelleinrichtung gemäß den Figuren 1a bis 1c,

Figur 3

ein Ausführungsbeispiel für ein Sensorelement des aktiven Sensorteils gemäß der Figur 2,

Figuren 4a, 4b, 4c

Detailansichten der relativen Lage des passiven Sensorteils relativ zum aktiven Sensorteil bei der Verstelleinrichtung gemäß den Figuren 1a bis 1c,

Figur 5

ein zweites Ausführungsbeispiel für eine erfindungsgemäße Verstelleinrichtung,

Figuren 6

ein drittes Ausführungsbeispiel für eine erfindungsgemäße Verstelleinrichtung.

To illustrate the invention

Figures 1 a to 1 c

A first embodiment of an adjusting device according to the invention, in a three-dimensional representation,

FIG. 2

An exemplary embodiment of an active sensor part of the adjusting device according to the figures 1a to 1c,

FIG. 3

an exemplary embodiment of a sensor element of the active sensor part according to FIG. 2,

FIGS. 4a, 4b, 4c

Detailed views of the relative position of the passive sensor part relative to the active sensor part in the adjusting device according to the figures 1a to 1c,

FIG. 5

A second embodiment of an adjusting device according to the invention,

FIGS. 6

a third embodiment of an adjusting device according to the invention.

In the figure 1a can be seen a window lift as adjusting. Of the Window has a driver 1, which is guided in a guide rail 2. The driver 1 comprises a slider or sliding region 11 made of plastic, a passive Sensor part 12, a mounting portion 13 for fixing a window pane in Shape of at least one jaw 13 and a nipple chamber 14th

On the guide rail 2, an active sensor part 3 is attached to a housing 31. The attachment of the housing 31 to the guide rail 2 is based on a Clip element 32 of the active sensor part 3, which is clipped to the guide rail 2. In the housing 31 of the active sensor part 3, an electronic circuit is arranged, which generates an electrical measurement signal, the position of the driver 1 relative to Indicates guide rail 2.

The passive sensor part 12 operates as a so-called "scale" and has for this purpose comb-like structure on. The scale 12 is at two U-shaped sensor elements 34th the active sensor part 3 passes, so that the sensor elements 34 the comb-like structure of the scale 12 can capture.

An essential advantage of this embodiment is that in this Arrangement no electrical connection lines led to the moving element Need to become; because the active part of the sensor, as a rule - from radio transmission or the like aside - requires an electrical connection is arranged body-mounted and thus easily electrically connected or "wired".

FIG. 1b shows another view of the window lifter shown in FIG. 1a shown. In contrast to Figure 1a, the guide rail 2 is omitted to a to allow better view of the active sensor element 3. In FIG. 1b, therefore a clip element 32 of the passive sensor part 12 visible. With this clip element 32 is the housing 31 of the passive sensor element 12 on the guide rail. 2 clipped.

In addition, FIG. 1 b shows a second clamping jaw 13 'whose distance from the Jaw 13 by means of a screw 131 is adjustable.

In Figure 1 b can be seen beyond guide slots 111 with an L-shaped Cross-section. The guide slots 111 serve to secure the driver 1 to the in the figure 1 b, not shown guide rail. 2

FIG. 2 shows the active sensor element 3 in detail. Good to see in particular the clip element 32, with which the active sensor element 3 on the Guide rail 2 is festgeklippst. In addition, you can see in the figure 2, the two U-shaped sensor elements 34, with which the position of the scale 12 is detected. The two - identical - sensor elements 34 form a double capacitance sensor.

h1 = 5 mm

h2 = 1 mm

h3 = 1 mm

b1 = 1 mm

b2 = 3 mm

h2 = 1 mm

Periodenlänge des Profils (bei einer 50-50 Aufteilung): 2 mm

The structure of the two sensor elements 34 is shown in cross section in detail in FIG. It can be seen two parallel capacitor plates 341, which are arranged in a non-conductive U-shaped holder 342 made of POM plastic. The two capacitor plates 341 are connected to an electronic circuit 33, which emits a position signal indicative of the respective position of the scale 12 according to FIG. 1a at an output A33. The dimensions of the sensor elements 34 can be selected, for example, as follows:

h1 = 5 mm

h2 = 1 mm

h3 = 1 mm

b1 = 1 mm

b2 = 3 mm

h2 = 1 mm

Period length of the profile (for a 50-50 division): 2 mm

With such dimensioning, the capacitance between the two changes Capacitor plates 341 at a step profile of the scale 12 by about 200 fF at every step change. It forms concretely a rectangular capacity course with a Capacity lift of approx. 200 fF and a mean value of approx. 1 pF.

In the figure 3 can be seen beyond the scale 12, in which a sheet 122 as Carrier part is arranged. On the sheet 122 is made of plastic comb-shaped profile 121 up or injected. The scale 12 forms with it So-called outsert part, so a part that contains a metal core, to the plastic is injected. Alternatively, the scale 12 also exclusively made of plastic exist and on the slider or sliding portion 11 made of plastic directly in one piece be formed.

FIGS. 4a, 4b and 4c show the scale 12 and the active sensor part 3 its sensor elements 34 shown in detail. FIG. 4a shows a view in FIG Motor vehicle Z-direction. So you can see "vertically downwards". One recognizes in the Figure 4a, that the scale 12 between the capacitor plates of the two U-shaped Sensor elements 34 is passed. In addition, the housing 31 and the Clip element 32 recognizable.

FIG. 4b shows a view of the scale 12 and the active sensor part 3 in FIG Motor vehicle X-direction shown. In FIG. 4b it can thus be seen that the two U-shaped sensor elements 34, a double sensor arrangement with a total of four Condenser plates forms.

In the figure 4c is the passing of the with the comb-shaped plastic profile 121st equipped scale 12 to the active sensor part 3 and to the U-shaped Sensor elements 34 shown again in a three-dimensional view.

FIG. 5 shows a second exemplary embodiment of an adjusting device. The passive sensor part 12 is formed by a magnetic rod, in which the Magnetic properties vary over the length of the magnetic rod, in such a way that the radially directed magnetic field lines in the longitudinal direction of the magnetic rod continuously or segmented angularly aligned. If the driver 1 and thus the Magnetic rod 12 moves relative to the guide rail 2, so moves the Magnetic rod 12 past an active sensor part 7. The active sensor part 7 has a magnetoresistive sensor, for example a Hall sensor 71, with which the Alignment of the magnetic field in the magnetic rod 12 is measured. The corresponding sensor signal is in an electronic circuit 72 of the active Sensor part 7 evaluated, whereby the position of the magnetic rod 12 and thus the Position of the driver 1 relative to the guide rail 2 is determined. The Electronic circuit 72 outputs as an output signal an electrical - analog or digital - Measuring or position signal indicating the position of the driver 1.

The electronic circuit 72 is in the housing of the active sensor part 7 accommodated, thus saving a separate housing for the electronic circuit 72 becomes. The electronic circuit is - this is for reasons of clarity in the Figures not shown - via a cable with a control device in connection; these Control device is designed such that it the measurement signal of Electronic circuit 72 evaluates and the control of the drive of the Adjustment taking into account the position of the driver 1 makes.

The housing facing the end of the cable and the housing of the active Sensor part 7 are molded together with plastic to a waterproof To ensure connection.

FIG. 6 shows a third exemplary embodiment of an adjusting device. you detects a passive sensor part 12 with two sensor tracks 123 and 124. Each of these two sensor tracks 123 and 124 are each a separate sensor element 81 of a associated active sensor part 8. The two sensor elements 81 may be each act around double-capacity sensors. The dual-capacity sensors can for example, from those explained in connection with Figures 2 and 3 Sensor elements 34 may be formed.

The two sensor tracks 123 and 124 have recesses 125 which are so are arranged to form an encoding. When passing the Driver 1 on the guide rail 2, the recesses 125 to the associated sensor elements 81 of the active sensor part 8 passes. at appropriate coding can thus be the absolute position of the driver 1 relative to Determine guide rail 2. An absolute position determination is even then possible if the driver is 1, so not on the guide rail 2 over is moved.

LIST OF REFERENCE NUMBERS

1

takeaway

2

guide rail

3

Active sensor part

7

Active sensor part

8th

Active sensor part

11

Glider (sliding area)

12

Passive sensor part

13; 13 '

Clamping jaws (fixing area for window pane)

14

nipple chamber

31

casing

32

clip element

33

electronics

34

sensor element

71

Hall sensor

72

electronic circuit

81

sensors

111

Guide slots with L-shaped cross section

121

profile

122

support part

123, 124

sensor tracks

125

recesses

131

screw

141

Recesses in the nipple chamber

311

stop surface

Claims (33)

Adjusting device for a motor vehicle for adjusting a movable element (1) of the adjusting device with a sensor system having at least one active sensor part (3) and with at least one passive sensor part (12),
characterized in that the active sensor part (3) is a stationary capacitive sensor and the passive sensor part (12) forms a part of the movable element (1). Adjusting device according to one of the preceding claims, characterized in that the passive sensor part (12) forms an integral part of the movable element (1). Adjusting device according to claim 2, characterized in that the passive sensor part (12) is integrally formed on the movable element (1). Adjusting device according to one of the preceding claims, characterized in that the passive sensor part (12) has a capacity-changing profile (121). Adjusting device according to claim 4, characterized in that the profile (121) is comb-shaped or sinusoidal. Adjusting device according to claim 4, characterized in that the profile has at least one monotonically increasing or at least one monotonically decreasing profile. Adjusting device according to one of the preceding claims, characterized in that the passive sensor part (12) has at least two sensor tracks (123, 124). Adjusting device according to one of the preceding claims, characterized in that the profile (121) is formed in a plastic material. Adjusting device according to claim 8, characterized in that the plastic material on a, in particular metallic support member (122) is aufspritzt or injected, in particular to form an outsert part. Adjusting device according to one of the preceding claims, characterized in that the carrier part (122) is designed such that when passing the passive sensor part (12) on the active sensor part (3), the electric field in the region of the active sensor part (3) is unaffected , Adjusting device according to one of the preceding claims, characterized in that the carrier part (122) also has a capacity-changing profile. Adjusting device according to one of the preceding claims, characterized in that the active sensor part (12) on a body-mounted carrier element (2) by means of a clip member (32) is aufgeklippst, said clip element (32) preferably in one piece with a housing (31) of the active sensor part connected and further preferably made of plastic. Adjusting device according to one of the preceding claims, characterized in that the housing (31) of the active sensor part (3) forms at least one stop surface (311) for the movable element (1) to which the movable element (1) at least in one of its two Endlagen strikes. Adjusting device according to one of the preceding claims, characterized in that the sensor system comprises an evaluation device, in particular an electronic circuit (72), which evaluates the sensor signal of the active sensor part (3), wherein the evaluation device (72) is preferably configured such that it out the sensor signal of the active sensor part (3) forms an analog or digital measurement signal which indicates the absolute or relative position of the movable element (1). Adjusting device according to claim 14, characterized in that the evaluation device (72) is fixed in place, wherein the evaluation device (72) preferably in the housing (31) of the active sensor part (3) is housed. Adjusting device according to one of the preceding Claims 14 or 15, characterized in that the evaluation device (72) is connected via at least one cable to a control device of the adjusting device connected to a drive of the adjusting device and in that the control device is designed such that it controls the analog or digital evaluation signal of the evaluation device (72) evaluates and performs the control of the drive taking into account the absolute or relative position of the movable element, wherein preferably at least one cable and a housing of the evaluation device (72) are connected watertight. Adjusting device according to claim 16, characterized in that the evaluation device (72) in the housing (31) of the active sensor part (3) is housed and the housing (31) of the active sensor part (3) and the cable are connected watertight. Adjusting device according to claim 17, characterized in that the watertight connection between the cable and the housing of the evaluation device (72) or the housing (31) of the active sensor part (3) is effected by the said housing (31) facing the end of the cable and the housing (31) are encapsulated together with plastic. Adjusting device according to one of the preceding claims, characterized in that characterized in that the adjusting device is a window lift and serving for fixing the window pane mounting portion (13) of the driver (1) - in particular, for example, a jaw (13) of the mounting area - made of metal and is connected by plastic injection with a guided by the guide rail (2) of the window lifter sliding portion (11) of the driver (1), wherein on the sliding portion (11), the passive sensor part (12) is integrally formed. Adjustment device for a motor vehicle for adjusting a movable element of the adjusting device with an active and a passive sensor part, characterized in that the adjusting device is a window lift, on the driver (1) for the window pane as a passive sensor part a magnetic field-changing element is arranged. Adjusting device according to claim 20, characterized in that the passive sensor part (12) is an integral part of the driver (1). Adjusting device according to one of the preceding claims 20 or 21, characterized in that the passive sensor part (12) is integrally connected to the driver (1). Adjusting device according to one of the preceding claims 20 to 22, characterized in that the passive sensor part is designed such that it changes the magnetic field generated by the active sensor part. Adjusting device according to one of the preceding claims 20 to 22, characterized in that the passive sensor part (12) has at least one permanent magnetic region whose magnetic field is detected by the active sensor part (7). Adjusting device according to one of the preceding claims 20 to 24, characterized in that the profile of the passive sensor part is comb-shaped or sinusoidal. Adjusting device according to one of the preceding claims 20 to 24, characterized in that the profile of the passive sensor part has at least one monotonously rising or falling course. Adjusting device according to one of the preceding claims 20 to 26, characterized in that the passive sensor part has periodically arranged, equidistant magnetic poles with alternating magnetic field alignment. Adjusting device according to one of the preceding claims 20 to 27, characterized in that the passive sensor part has at least two sensor tracks, which are preferably arranged to each other such that a measurement of the absolute position is possible even at a standstill of the movable element. Adjusting device according to one of the preceding claims 20 to 28, characterized in that the active sensor part (7) has a magnetoresistive sensor, in particular a Hall sensor (71). Adjusting device according to claim 29, characterized in that the Hall sensor (71) is biased electrically or magnetically. Adjusting device according to one of the preceding claims 20 to 30, characterized in that the magnetic properties of the passive sensor part vary over its length such that the radially directed magnetic field lines in the longitudinal direction of the sensor part are aligned continuously or segmentally angularly aligned. Adjusting device according to one of the preceding claims 20 to 31, characterized in that the passive sensor part comprises an injection molded part, in which magnetic material is injected. Adjusting device according to claim 32, characterized in that magnetic material is magnetically aligned after injection molding by a magnetic field.

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