Machining assembly comprising a first and a second electric motor, a drive unit and a feed module

#The present invention relates to a machining assembly according to the description herein.

#For making of holes in for instance concrete or other hard materials, it is known to use a machining assembly with a drilling tool driven by a drive motor where the drive motor is arranged in a drive unit carried by a machine stand. Such a machining assembly is for instance previously known from WO 82/00863 A1. In the machining assembly disclosed in WO 82/00863 A1, the drive unit is connected to a feed unit, by means of which the drive unit is displaceable along a column included in the machine stand. The drilling tool may for instance consist of a hollow cylindrical drill bit, which at one end is attached to a spindle driven by the drive motor and which at its other end is provided with machining bodies with cutting edges of diamond, wherein the machining bodies are fixed to the outer annular edge of the drill bit. When a hole is to be made in a construction member, such as a joist or a wall, the drive unit is fed along the column in the direction towards the construction member, wherein the drill bit works its way into the construction member and cuts out a cylindrical body from the construction member while leaving a corresponding cylindrical hole therein.

#The feed unit of the machining assembly disclosed in WO 82/00863 A1 is provided with a rotatable feed gear wheel which is in engagement with a cog track on the machine stand, wherein the feed gear wheel is configured to be manually rotated in order to manually move the feed unit along the machine stand.

#The invention will in the following be more closely described by means of embodiment examples, with reference to the appended drawings. In the drawings:

#FIGS. 1a and 1b are perspective views from different directions of a machining assembly according to an embodiment of the present invention,

#FIG. 2 is a perspective view of a drive unit included in the machining assembly of FIG. 1,

#FIG. 1 shows a machining assembly 1 according to an embodiment of the present invention. This machining assembly 1 comprises a drive unit 10, a feed module 30 and a machine stand 2 for supporting the feed module and the drive unit.

#In the illustrated embodiment, the machine stand 2 comprises a base plate 3, through which the machine stand is intended to rest against a supporting surface, and an elongated column 4 which is attached to and projects from the base plate 3. The column 4 is with advantage pivotally mounted to the base plate 3 in order to allow an adjustment of the inclination of the column in relation to the base plate. A guide track 5 extends along the column 4. In the illustrated example, this guide track 5 is formed by two elongated guide track elements 5a, 5b which are arranged in parallel with and at a distance from each other. A cog track 6 extends along the column 4 in parallel with the guide track 5.

#The drive unit 10 is detachably mountable to the feed module 30 in order to allow the drive unit to be moved along the guide track 5 on the machine stand 2 via the feed module.