DE29816854U1 - Measuring device for assemblies, in particular body assemblies - Google Patents

Description

Measuring device for assemblies, especially body assemblies

The invention relates to a measuring device according to the preamble of claim 1.

From DE 41 40 294 A1, a measuring device for determining a surface contour by mechanically scanning individual points on a surface with a measuring arm that has at least three articulated arms that can move relative to one another is known. Furthermore, three-D coordinate measuring devices are known that are guided on measuring rails and which are firmly connected to stationary measuring plates, for example, whereby the use of the measuring device is directly linked to the measuring plate. A measuring arm that encompasses the measuring device is moved and held manually.

The object of the invention is to create a measuring device which can be used in a simple and flexible manner for assembling and checking assemblies, in particular body assemblies.

This object is achieved according to the invention by the features of claim 1. Further advantageous features are contained in the subclaims.

The main advantages achieved with the invention are that the measuring device can be used in a variety of ways, independent of a stationary measuring plate, so that it can be used, for example, in vehicles, in assemblies, in production in the warehouse and also generally in the workshop. The assemblies can be repaired, modified, expanded and built up using the measuring device.

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So that, for example, the assembly of an assembly can be carried out in a simple manner with the measuring device, the articulated arms of the measuring arm can be locked in the swivel and pivot bearings so that a measuring probe of the measuring arm fixes a fixed measuring point in space according to set coordinates.

This measuring point and other measuring points are used to set up or check the assembly or the like. In contrast to known measuring devices in which the measuring arm must be held manually, the measuring arm according to the invention can be fixed in any position using the locking devices and can be moved and fixed again as required.

The locking devices are arranged in the swivel and pivot bearings and are activated simultaneously so that the measuring arm as a whole is a rigid structure and assembly work or a control measuring process can be carried out in a simple manner.

The locking device can be operated pneumatically, hydraulically, electrically or in another way, whereby a pneumatic device is described according to the invention.

The clamping elements comprising the locking devices are designed in the form of ring elements or the like and are arranged in chambers of the bearings. By means of compressed air, these ring elements clamp the fixed part of the articulated arms and thus fix the measuring arm.

An articulated arm that can be rotated about a vertical axis on the measuring arm stand can be secured by means of a disc brake.

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The locking devices and the disc brake are connected to each other via an air pressure line and are equipped with a pump that can be switched on and off using a switch. This enables all articulated arms to be locked together quickly and the locking mechanism to be released for further fixing and measuring points.

An embodiment of the invention is shown in the drawings and is described in more detail below. They show

&iacgr;&ogr; Fig. 1 a side view of a measuring arm, with two articulated arms and a stand with base plate,

Fig. 2 a partial top view of the measuring arm with rotary and swivel bearings and a disc brake,

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Fig. 3 a section through a pivot bearing about a transverse axis with a locking device,

Fig. 4 a section through a rotary bearing about a longitudinal axis with a locking device, and

Fig. 5 shows a disc brake on the articulated arm.

The measuring device 1 essentially comprises a measuring arm 2 with two articulated arms 3 and 4 and a measuring probe 5. The articulated arms 3, 4 are connected to one another in an articulated manner via a pivot bearing 6, and pivot bearings 8, 9. A further pivot bearing 7 for the articulated arm 4 about an axis x - x is provided on the stand 10, which has a base plate 11 or the like.

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Each bearing 6, 8 and 9 is provided with a locking device A, B and C, and only the pivot bearing 7 can be equipped with a disc brake D.

The locking devices A, B and C are provided with a clamping device comprising ring elements 12, which are each arranged between a fixed and a movable part of the articulated arms 3, 4 in chambers 13 of the bearings 6, 8, 9.

The locking devices A, B, C are actuated pneumatically by injecting compressed air into the chambers 13 of the bearings and clamping the ring elements 12 onto a fixed part of the fork arms 3,4.

The locking device A in the bearing 6 has wedge elements 14, 15 in the chamber 13, which are arranged with their inclined surfaces corresponding to inclined surfaces 16 of the chamber 13. By applying compressed air to the chambers 13, the wedge elements 14, 15 are pushed through the ring elements 12 along the inclined surface 16 against the fixed part of the handlebar arm and thus cause a clamping effect.

As Figure 5 shows in more detail, the entire measuring arm 2 is fixed to the stand 10 via a disk brake 14. The disk brake 14 essentially consists of a brake disk 15 on the articulated arm 4, which is fixed to a counter-pressure plate 17 of a housing 18 via a pressure stamp 16.

The locking devices A, B, C in the bearings 6, 8 and 9 as well as the disc brake D in the bearing 7 are all connected to one another via compressed air lines 20, whereby the compressed air is supplied, for example, via line 21, which is connected to a pump 22, which can be switched on and off via a switch 23.

Claims (9)

Protection claims 1. Measuring device for assemblies, in particular body assemblies, which have a multi-part measuring arm with a measuring probe, and works together with an evaluation unit storing three-D coordinates, characterized in that the measuring device (1) consists of a structural unit with the measuring arm (2) that can be used independently of a stationary measuring plate, the individual articulated arms (3, 4) of which are adjustable in pivot and rotary bearings (6, 7, 8, 9) and can be fixed in set positions via controllable locking devices (A, B, C, D). 2. Device according to claim 1 ₁ , characterized in that the measuring device (1) has at least one stand (10) on the measuring arm (2) for temporary fixing to an assembly. 3. Device according to claims 1 or 2, characterized in that the locking devices (A, B, C, D) consist of compressed air-controlled clamping devices in the rotary and pivot bearings (6, 7, 8, 9) of the fork arms (3, 4), which are each arranged between a fixed and a movable part of the articulated arms (3, 4). 4. Device according to claims 1, 2 or 3, characterized in that the devices (A, B, C) contain ring elements (12) pressurized with compressed air in chambers (13) of the bearings (6,8, 9), each of which can be clamped onto a fixed part of the articulated arms (3,4). 5. Device according to claims 1, 2, 3 or 4, characterized in that at least the locking device (A) is pressurized by the ring elements (12). Wedge elements (14) which interact with inclined surfaces (16) of a chamber (13) in the fixed part of the articulated arms (3,4). 6. Device according to claims 1, 2 or 3, characterized in that the one articulated arm (3) having the measuring probe (5) and the other articulated arm (4) provided with a connecting foot (11) are designed to be independently rotatable and pivotable relative to one another and each of the bearings (6, 8, 9) is provided with a locking device (A, B, C). 7. Device according to one or more of the preceding claims, characterized in that the further articulated arm (4) has a brake disc (15) and can be fixed to the connecting foot (11) in its pivoting movement about a vertical pivot axis (x - x) by means of a clamping element (D). is 8. Device according to claim 6, characterized in that the tensioning element (D) of the brake disc (15) consists of a pressure piston (16) in a housing (18) and the brake disc (15) is arranged between this and a counterpressure plate (17) of the housing (18). 9. Device according to one or more of the preceding claims, characterized in that compressed air can be supplied to the chambers (13) of the locking devices (A, B, C) via several connecting lines (20), which can be generated via a pump (22) which can be activated via a switch (23) for switching on and off.