DE102014115224B3 - Device and method for mounting a sensor - Google Patents

Abstract

Device for fastening a sensor (2) to a base body (4), having a tensioning device (6) and a receiving body (8) for the sensor (2) and a sliding block (10), the base body (4) being in a surface plane (Fig. 14) has a groove (28) with an undercut (12), wherein the sliding block (10) in the groove (28) of the base body (4) is inserted, wherein the receiving body (8) is U-shaped and the sensor ( 2) within the U-shape of the receiving body (8) is arranged, the clamping device (6) in the receiving body (8) is arranged and with the sliding block (10) in the groove (28) is connectable, and the receiving body (8) rests on one of the surface plane (14) of the base body (4) and the sensor (2) rests on the same surface plane (14) of the base body (4), wherein the sensor (2) is wider than the groove (28) and the sensor ( 2) is positioned directly over the groove (28).

Description

The present invention relates to a device for attaching a sensor to a base body according to the preamble of claim 1.

The EP 1 037 021 B1 discloses a device for attaching a sensor to a base body, comprising a groove-like longitudinal depression provided on the base body, into which the sensor can be inserted with a foot section and with a tensioning device, by means of which the sensor can be braced to secure it to the inner surface of the longitudinal recess the clamping device is located completely outside the longitudinal recess, wherein this is anchored on the one hand to the base body and on the other hand applied to a lying outside the longitudinal recess back portion of the sensor inserted in the longitudinal recess.

The EP 2 372 168 A1 relates to an arrangement for axially adjustable fixing of a cylindrical sensor within a groove.

Various magnetic cylinder sensors are known from the brochure "Magnetic Cylinder Sensors 8016543" of SICK AG.

From the catalog 'Sensor Selection for Numatics Cylinders' by Turck fasteners for cylinder sensors are known.

From the prospect, compact, fast, non-contact. Magnetic sensors. ' Baumer presents a selection of mounting accessories for magnetic sensors.

The brochure 'Clamp Cylinder' by SMC shows assembly means for cylinder sensors.

From the JP 2000 17 0714 A a device for mounting a sensor on a base body is known, with a clamping device (screw) and a receiving body for the sensor and a sliding block, wherein the base body in a surface plane has a groove with an undercut, wherein the sliding block inserted into the groove of the base body is, the receiving body U-shaped, is formed with two legs and a projection for fixing the sensor and the sensor is disposed within the U-shape of the receiving body, the clamping device is arranged in the receiving body and is connectable with the sliding block in the groove with the sensor positioned directly over the groove. The disadvantage is that with this device, the groove must always be designed at least as wide as the sensor.

The DE 10 2008 032 075 A1 discloses a mounting mechanism for a position detection sensor.

The DE 10 2007 034 900 A1 discloses a position detecting sensor equipped with a holder.

The JP 2009-121602 A discloses a sensor which is arranged with a holder in a groove of a hydraulic cylinder.

The DE 10 2008 043 570 A1 discloses a switch mounting structure for a fluid pressure device.

The DE 198 00 199 A1 discloses a switch mounting mechanism for fluid pressure device.

From the DE 10 2005 035 831 A1 a device for mounting a sensor to a base body is known, comprising a tensioning device (screw) and a receiving body for the sensor and a sliding block, wherein the base body on a surface plane has a rail with a groove having an undercut, wherein the sliding block in the groove the base body is inserted, the receiving body is U-shaped, formed with two legs and a projection for fixing the sensor in the C-groove and the sensor is disposed within the U-shape of the receiving body, the clamping device is arranged in the receiving body and is connectable with the sliding block in the groove and the receiving body rests on the surface plane of the base body and on the rail with the groove. The disadvantage is that the DE 10 2005 035 831 A1 a mounting rail with groove on the surface plane of the base body requires, so that the sensor must rest next to the rail on the surface plane of the base body.

Furthermore, sensors are known, which are fastened, for example, in the prior art in a groove of a cylinder. The groove is larger than the sensor itself and can absorb the sensor in whole or in part.

One task is to position the sensor directly over the groove. Another object is to provide a sensor mounting on a groove, in which also wide sensors can be mounted directly on a narrower groove in the surface plane of a base body.

The object is achieved according to claim 1 by a device for fastening a sensor to a base body, with a clamping device and a receiving body for the sensor and a sliding block, wherein the base body in a Surface level has a groove with an undercut, wherein the sliding block is inserted in the groove of the base body, wherein the receiving body is U-shaped and the sensor is disposed within the U-shape of the receiving body, the clamping device is arranged in the receiving body and with the Nut is connectable in the groove, and the receiving body rests on the surface plane of the base body and the sensor rests on the same surface plane of the base body, wherein the sensor is wider than the groove and the sensor is positioned directly above the groove.

Sensors according to the invention may be any type of sensor. For example, optical, capacitive, inductive or magnetic sensors. Inductive or magnetic sensors are used in particular for distance measurement or position measurement of piston movements or piston positions of piston-cylinder arrangements. In this case, the piston has a permanent magnet. The sensor has one or more sensor elements, for example Hall elements, for detecting the permanent magnet of the piston. The Hall elements can detect the magnetic field of the piston and an evaluation unit is designed to sequentially detect one position or a plurality of positions on the basis of the signals of the Hall element (s) and to output a position or displacement measurement signal.

According to the invention, it is initially possible to fasten the sensor to a groove which is smaller than the sensor itself.

According to the invention, the mounted sensor lies directly on the surface plane of the base body. The base body is given for example by a cylinder of a piston-cylinder arrangement. Because the sensor rests directly on the surface plane of the base body, the sensor is arranged as close as possible to the piston or to the object to be detected. For example, the sensor can be arranged directly above the groove itself, without additional components or components of the device having to be arranged between the groove and the sensor. In a cylinder-piston arrangement, the sensor is thus arranged with a minimum possible radial distance from the magnet.

Depending on the shape of the groove, different sliding blocks with adapted geometrical shapes can be optionally used for the groove geometry. As a result, the device according to the invention can be used in many ways for different grooves.

Depending on the depth of the groove or depending on the shoulder height of the groove optionally different length clamping devices can be used. As a result, the device according to the invention can be used in many ways for different groove depths or different shoulder heights of the groove.

According to the invention, it is further optionally possible to mount the sensor directly from above on the surface plane. Such a mounting option is referred to as drop-in mounting, in which the sensor does not have to be inserted laterally into a groove. However, lateral insertion is also possible.

The clamping device is arranged in the receiving body and connectable with the sliding block in the groove. With the clamping device, the receiving body is pressed or clamped against the sliding block and thereby fixed. Then the sensor is mounted. However, first the sensor can be mounted in the receiving body and then the receiving body fixed to the sliding block.

The U-shaped receiving body is made for example of plastic or metal, for example steel or aluminum.

In a further development of the invention, the tensioning device is a screw. With the screw as a clamping device, the clamping device can be easily realized. In this case, the receiving body has a hole for the screw and the nut on a thread for the screw. When screwing the screw through the receiving body into the nut, the receiving body is attached to the nut. The screw has a screw head, for example, with a hexagon socket for operating the screw. However, it is also possible to provide other actuating means of the screw, such as a thumbscrew, which can be operated with the bare hand.

According to a preferred embodiment of the invention, the groove of the base body is a C-groove or a dovetail groove. A C-groove has the advantage that it is easy to manufacture and has a part-circular cross-section. This form also the associated sliding blocks are geometrically easy to produce, since these are easy to produce with a part-circular cross-section as turned parts, wherein one side of the sliding block is usually flattened to provide a mounting position for the clamping device or the screw. Also, a dovetail groove is easy to produce by the extrusion process.

In a further development of the invention, the receiving body has two legs, wherein the sensor is arranged between these legs. Depending on the sensor size different receiving body can be provided, each one have different distance between the legs to attach different sized sensors.

According to a preferred embodiment of the invention, the legs each have a projection for fixing the sensor. Thus, the legs each have a projection on which the sensor itself can be attached or the sensor is attached by the projections themselves. The two legs of the receiving body together with the surface plane of the base body again form a kind of fastening groove in which the sensor itself can be attached.

In a further development of the invention, the legs of the receiving body are connected to each other by a strut at the open end of the U-shape. By the bracing the legs of the receiving body are mechanically stabilized, so that these are mechanically stable, especially for long legs. The bracing has the further advantage that the legs themselves less stiff and thus can be made thinner.

In a further development, a pin is arranged on the closed end of the U-shaped receiving body. The pin points in the direction of the groove. Through the pin, the receiving body can be fixed in the groove such that the receiving body is indeed displaceable along the groove, but can not be moved transversely to the groove. For example, the pin also prevents rotation of the receiving body about the axis of attachment of the clamping device.

It can also be arranged two receiving body respectively at the short ends of the sensor. In particular, with longer sensors so a two-sided stable mounting of the sensor is possible.

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 device according to the invention with a first receiving body;

2 a device for attachment to a second receiving body;

3 a device for attachment without illustrated base body;

4 a device for attachment in a cross-sectional view;

5 a device for attachment with a too 4 different shoulder height in a cross-sectional view;

6 a device for fastening according to 4 with illustrated sensor;

7 a device for attachment to a receiving body and a strut;

8th a device for fastening with a pin on the receiving body, without illustrated base body.

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

1 shows a device 1 for attaching a sensor 2 on a base body 4 , with a clamping device 6 and a receiving body 8th for the sensor 2 and a nut 10 , wherein the base body 4 a groove 28 with an undercut 12 having, wherein the sliding block 10 in the groove 28 of the base body 4 is inserted, wherein the receiving body 8th U-shaped and the sensor 2 within the U-shape of the receiving body 8th is arranged, the clamping device 6 in the receiving body 8th is arranged and with the nut 10 in the groove 28 is connectable, and the receiving body 8th on a surface level 14 of the base body 4 rests and the sensor 2 on the same surface level 14 of the base body 4 rests.

According to 1 is the clamping device 6 a screw 16 , In this case, the receiving body 8th a hole for the screw 16 on and the invisible mortise a thread for the screw 16 on. When screwing in the screw 16 through the receiving body 8th through into the nut is the receiving body 8th and thus the sensor 2 attached to the sliding block. The screw 16 has a screw head, for example with a hexagon socket for operating the screw 16 , However, it is also possible to use other actuating means of the screw 16 provide, such as a thumbscrew which can be operated with the bare hand.

According to 1 has the receiving body 8th two thighs 20 on, being between these thighs 20 the sensor 2 is arranged. Depending on the sensor size, different receiving bodies 8th be provided, each having a different distance between the legs 20 have to different sized sensors 2 to fix. As shown in 1 the legs are lost 20 parallel to the groove 28 ,

The sensor 2 even has one with the sensor 2 connected rotary movable clamping part, which is brought in when inserted into the receiving body sensor by turning into a clamping position, in which it is clamped to opposite inner surfaces of the legs of the receiving body. The clamping part has two with respect to its axis of rotation radially outwardly facing clamping surfaces, which are located opposite to the axis of rotation of the clamping member and form an eccentric shape over which the clamping member in the clamping position between the inner surfaces of the legs 20 is tense. The clamping surfaces have a structured surface, via which a partially positive connection between the clamping surfaces and the inner surfaces of the legs 20 is formed.

According to 2 have the thighs 20 one projection each 22 for fixing the sensor 2 on. This shows the thighs 20 one projection each 22 on where the sensor 2 itself can be attached or the sensor 2 through the projections 22 itself is attached. The two thighs 20 of the recording body 8th form together with the surface level 14 of the base body 4 again a kind of fastening groove in which the sensor 2 itself can be fastened.

The in 2 illustrated sensor 2 is unlike the sensor 2 according to 1 by a clamping screw between the legs 20 of the recording body 8th and the nut 10 jammed. The clamping screw of the sensor 2 For example, a grub screw, which is guided in a thread of the sensor housing and when turning the sensor 2 from the nut 10 pushes against the two projections 22 the thigh 20 of the recording body.

According to 2 is the groove 28 of the base body 4 a C-groove 18 , A C-groove 18 has a part-circular cross-section. Also the nut 10 according to 2 respectively. 3 has a part-circular cross-section. One side of the sliding block 10 is flattened to a mounting position for the clamping device 6 or the screw 16 provide. In 3 the base body is not shown. 3 shows the essential parts of the fastening device or device 1 for attachment, namely the receiving body 8th , the clamping device 6 and the nut 10 ,

4 shows a device according to the invention 1 for attachment according to 3 in a cross-sectional view. In 4 is the undercut 12 the groove 28 shown.

5 shows a device according to the invention 1 for attachment with one too 4 different shoulder height 30 in a cross-sectional view.

6 shows a device for fastening according to 4 with illustrated sensor 2 ,

According to 7 are the thighs 20 of the recording body 8th by a bracing 24 connected at the open end of the U-shape. By the bracing 24 become the thighs 20 of the recording body 8th mechanically stabilized, so that especially for long legs 20 these are mechanically stable. The bracing 24 can be integral with the receiving body 8th be connected. However, it is also possible that the bracing 24 in addition to the receiving body 8th is arranged.

According to 8th is at the closed end of the U-shaped receiving body 8th , so opposite to the open end of a pin 26 arranged. The pin 26 points in the direction of the groove, not shown. In 8th is the base body 4 also not shown. Through the pin 26 can the receiving body 8th be fixed in the groove such that the receiving body 8th Although it is displaceable along the groove, but can not be moved transversely to the groove. For example, prevents the pin 26 also a rotation of the receiving body 8th about the axis of attachment of the clamping device.

LIST OF REFERENCE NUMBERS

1

contraption

2

sensor

4

base body

6

tensioning device

8th

receiving body

10

sliding block

12

undercut

14

surface plane

16

screw

18

C-groove

20

leg

22

head Start

24

brace

26

spigot

28

groove

30

shoulder height

Claims (7)

Device for attaching a sensor ( 2 ) on a base body ( 4 ), with a tensioning device ( 6 ) and a receiving body ( 8th ) for the sensor ( 2 ) and a sliding block ( 10 ), the base body ( 4 ) in a surface plane ( 14 ) a groove ( 28 ) with an undercut ( 12 ), wherein the sliding block ( 10 ) in the groove ( 28 ) of the base body ( 4 ), wherein the receiving body ( 8th ) Is U-shaped and the sensor ( 2 ) within the U-shape of the receiving body ( 8th ), the tensioning device ( 6 ) in the receiving body ( 8th ) and with the sliding block ( 10 ) in the groove ( 28 ) is connectable, and the receiving body ( 8th ) at the surface level ( 14 ) of the base body ( 4 ) and the sensor ( 2 ) on the same surface level ( 14 ) of the base body ( 4 ), wherein the sensor ( 2 ) is wider than the groove ( 28 ) and the sensor ( 2 ) directly above the groove ( 28 ) is positioned. Device according to claim 1, characterized in that the tensioning device ( 6 ) a screw ( 16 ). Device according to one of the preceding claims, characterized in that the groove ( 28 ) of the base body ( 4 ) a C-groove ( 18 ) or a dovetail groove. Device according to one of the preceding claims, characterized in that the receiving body ( 8th ) two legs ( 20 ) and between these legs ( 20 ) the sensor ( 2 ) is arranged. Device according to one of the preceding claims, characterized in that the legs ( 20 ) each have a projection ( 22 ) for fixing the sensor ( 2 ) exhibit. Device according to one of the preceding claims, characterized in that the legs ( 20 ) of the receiving body ( 8th ) by a bracing ( 24 ) are connected together at the open end of the U-shape. Device according to one of the preceding claims, characterized in that at the closed end of the U-shaped receiving body ( 8th ) a pin ( 26 ) is arranged.

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