DE202014102013U1 - Sensor with clamp body - Google Patents

Abstract

Sensor with a sensor housing (2), wherein the sensor housing (2) or a part of the sensor housing (2) in a mounting groove (4) in a metallic mounting body (6) protrudes for attachment of the sensor (1), wherein on the sensor housing (2 ) an expandable metallic clamping body (8) is provided, wherein the clamping body (8) comprises means for spreading (10), characterized in that the clamping body (8) is connected to a defined electrical potential of the sensor (1).

Description

The present invention relates to a sensor with clamping body.

The DE 103 13 697 A1 discloses a sensor mounting variant with movably arranged by film hinges clamping blocks, the holder can be inserted flush from above through a gap opening in a T-shaped groove.

The DE 199 53 186 A1 discloses a cylinder switch, which is fixable by means of a specially designed fastening means of at least two expandable spring tongues, which may also be integrally formed, in a T-shaped groove of a machine part, in particular a working cylinder. The spring tongues are made of metal and have a injectable into the switch housing base, a sectionally protruding from the switch housing hinge portion and an adjoining head. The dimensions of the spring elements are matched to the groove such that the cylinder switch in its release position through the opening of the groove is radially inserted or removed.

The sensors of the prior art are suitable only for attachment in a T-shaped mounting groove.

An object of the invention is to provide a simpler attachment of a sensor for any groove geometries. Furthermore, the object is to provide a sensor which is less susceptible to interference, in particular electrically or electronically less prone to failure.

The object is achieved according to claim 1 by a sensor with a sensor housing, wherein the sensor housing or a part of the sensor housing protrudes into a mounting groove in a metallic mounting body for attachment of the sensor, wherein an expandable metallic clamping body is provided on the sensor housing, wherein the clamping body means for spreading, wherein the clamping body is connected to a defined electrical potential of the sensor.

By the invention, a defined electrical potential is connected to the sensor. This ensures that there is no insulation between the clamping body and the fastening body and thus, for example, no different electrical potentials can form between the sensor and the fastening body. As a result, the electromagnetic compatibility of the sensor is significantly improved.

The sensor is preferably a magnetic sensor, in particular a magnetic position or displacement sensor. However, the sensor may also be a capacitive or inductive sensor.

In a further development of the invention, the defined potential is a grounding potential. According to this embodiment, the sensor and the fastening body are connected to the ground potential, whereby the electromagnetic compatibility of the sensor is improved.

In a further development of the invention, the means for spreading of metal and connected to the defined electrical potential of the sensor. For example, a recording of the means for spreading is made metallic and connected to a defined electrical potential of the sensor. This connection is easily possible because, for example, the recording can be connected directly to a contact of the circuit board. The means for spreading is then connected by the recording with the electrical potential and the clamping body is connected via the means for spreading with the electrical potential.

In a preferred embodiment, the means for spreading is a Spreizgewindestift. A Spreizschraube or screw is performed in a threaded receptacle and by turning the Spreizgewindestifts the clamp body is pushed apart and pressed against the Befestigungsnutwand, whereby the sensor is attached. If the Spreizgewindestift turned back again go the clamping jaws of the clamp body by an elastic training back to its original position, whereby the sensor is released again from the mounting body.

In an alternative embodiment, the spreading means is a spreader pin. In contrast to Spreizgewindestift the spreader pin has no thread, but is slidably guided in the recording. If the expansion pin is pressed, for example in the direction of the clamping body, the clamping body is pressed apart and pressed against the Befestigungsnutwände of the fastening body, whereby the sensor is held in the groove. In this position, the expansion pin is formed, for example, lockable. If, however, the expansion pin is pulled out of the clamping body, the clamping jaws of the clamping body go through an elastic training back to its original position, whereby the sensor is released again from the mounting body.

In a further development of the invention, the fastening groove is U-shaped. A U-shaped groove is easier to produce than a T-shaped groove since the U-shaped groove has no undercuts. According to the invention, the sensor is held solely by the clamping force, ie by a frictional connection in the groove. A positive connection is not necessary. The fact that the sensor is held by the clamping force in the mounting groove, no undercut is needed to secure the sensor in the groove.

In development of the invention, the clamping body is arranged interchangeable. As a result, clamping body can be used with different dimensions for different mounting grooves. This allows easy mounting of the sensor in different grooves. For example, the sensor can thereby also be fastened in any desired fastening groove, in particular in a T-shaped or C-shaped groove.

The invention will be explained below with regard to further advantages and features with reference to the accompanying drawings with reference to embodiments. The figures of the drawing show in:

1 a sensor with a sensor housing in a mounting groove, wherein the clamping body is not clamped;

2 a clamped sensor with a sensor housing in a mounting groove;

3 a sensor with two clamping bodies, wherein a respective clamping body is arranged at each one end of the sensor housing.

In the following figures, identical parts are provided with identical reference numerals.

1 shows a sensor 1 with a sensor housing 2 , where the sensor housing 2 or part of the sensor housing 2 in a mounting groove 4 in a metallic fastening body 6 protrudes, for attaching the sensor 1 , wherein on the sensor housing 2 an expandable metallic clamp body 8th is provided, wherein the clamping body 8th Means for spreading 10 having, wherein the clamping body 8th with a defined electrical potential of the sensor 1 connected is.

The sensor 1 and the fastening groove 4 is according to 1 shown in a cross section. The sensor 1 has in cross section a T-shaped sensor housing 2 on. In the sensor housing 2 is a recording 16 for the expansion pin 14 or the Spreizgewindestift 12 intended. In the case of Spreizgewindestifts 12 shows the recording 16 an internal thread in which the Spreizgewindestift 12 is guided. The fastening groove 4 is for example U-shaped and has no undercut. The sensor housing 2 can directly into the mounting groove 4 be used.

The Spreizgewindestift 12 or the expansion pin 14 has actuating means at one end, for example, a slot or a cross-shaped notch for a screwdriver or an Allen or Torx receptacle for a corresponding key. The other end of the Spreizgewindestifts 12 or of the spreading pin 14 has a cone-shaped end 22 on. The cone-shaped end 22 lies in a conical recess 24 of the clamp body 8th , The conical recess 24 of the clamp body 8th has a slot, creating two clamping jaws 26 be formed, between which the conical end 22 of the spreading threaded pin 12 or the spreading pin 14 is arranged.

Will now according to 2 the Spreizgewindestift 12 by turning in the direction of the clamp body 8th moved, so spread the jaws 26 and are against the groove wall 28 of the fastening body 6 pressed, causing the sensor housing 2 in the mounting groove 4 of the fastening body 6 is fixed. In the case of Spreizgewindestifts 12 is the Spreizgewindestift 12 fixed solely by frictional forces in this position. The sensor 1 itself is also only by a frictional connection between the jaws 26 and the groove wall 28 fixed.

In order to increase the frictional connection, it is provided to form the expansion body in the clamping area with a surface structure.

When using a spreader pin 14 this is in the direction of the longitudinal axis of the expansion pin 14 in the recording 16 guided and presses the jaws 26 of the clamp body 8th also by a conical end 22 apart, leaving the jaws 26 against the groove walls 28 be pressed. The expansion pin 14 is fixed in this position by locking means. If the locking means solved, the expansion pin 14 again from the cone-shaped recording 24 of the clamp body 8th be pulled out, causing the jaws 26 of the clamp body 8th no longer against the groove wall 28 are pressed and the sensor 1 from the mounting groove 4 can be taken out.

3 shows the compound of the invention of the clamp body 8th with an electrical potential of the sensor 1 , The clamp body 8th is doing with an electrical connection 18 with the circuit board 20 connected. The electrical connection 18 can be formed by a contact wire or a sliding connection. For example, the defined potential is a grounding potential.

The means of spreading 10 , or the clamping body 8th is made of metal and with the defined electrical potential of the sensor 1 connected. As a result, the metallic fastening body with the electrical potential of the sensor 1 connected.

The sensor 1 according to 3 Optionally has at each end an attachment with a clamp body 8th on, leaving the sensor 1 can be attached at each end in the mounting groove, whereby a more stable and reliable attachment is achieved.

LIST OF REFERENCE NUMBERS

1

 sensor

2

 sensor housing

4

 mounting groove

6

 mounting body

8th

 clamping bodies

10

 Means for spreading

12

 Spreizgewindestift

14

 Arrowhead

16

 admission

18

 electrical connection

20

 PCB

22

 conical end

24

 cone-shaped receptacle

26

 jaws

28

 groove wall

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10313697 A1 [0002]
• DE 19953186 A1 [0003]

Claims (7)

Sensor with a sensor housing ( 2 ), wherein the sensor housing ( 2 ) or a part of the sensor housing ( 2 ) in a fastening groove ( 4 ) in a metallic fastening body ( 6 protrudes to attach the sensor ( 1 ), wherein on the sensor housing ( 2 ) an expandable metallic clamping body ( 8th ) is provided, wherein the clamping body ( 8th ) Spreading agent ( 10 ), characterized in that the clamping body ( 8th ) with a defined electrical potential of the sensor ( 1 ) connected is. Sensor according to claim 1, characterized in that the defined potential is a ground potential. Sensor according to one of the preceding claims, characterized in that the means for spreading ( 10 ) is made of metal and with the defined electrical potential of the sensor ( 1 ) connected is. Sensor according to one of the preceding claims, characterized in that the means for spreading ( 10 ) a Spreizgewindestift ( 12 ). Sensor according to one of the preceding claims 1 to 3, characterized in that the means for spreading ( 10 ) a spreader pin ( 14 ). Sensor according to one of the preceding claims, characterized in that the fastening groove ( 4 ) Is U-shaped. Sensor according to one of the preceding claims, characterized in that the clamping body is arranged exchangeably.

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