Abstract:
This invention relates to a universal tool rest for a milling planer and in particular to one mainly including two housings which may be rotated with respect to each other and three transmission shafts whereby the milling cutter thereon may be rotated in position with the tool rest so as to permit cutting of an inclined surface.

Description:
BACKGROUND OF THE INVENTION 
     It is found that the prior art tool rests for milling planers can only be moved either horizontally or vertically. That is, it is impossible to adjust such tool rests to cut inclined surfaces and so the workpiece must be manually rotated to adapt to the tool rest thereby causing user inconvenience and lost labor time. 
     It is, therefore, an object of the present invention to provide a universal tool rest for a milling planer which can be adjusted in angular position so as to permit cutting of an inclined surface as required. 
     SUMMARY OF THE INVENTION 
     This invention relates to a universal to a universal tool rest for a milling planer. 
     It is the primary object of the present invention to provide a universal tool rest for a milling planer which can be adjusted in any angular position. 
     It is another object of the present invention to provide a universal tool rest for a milling planer which is simple in construction. 
     It is still another object of the present invention to provide a universal tool rest for a milling planer which is easy to operate. 
     It is a further object of the present invention to provide a universal tool rest for a milling planer which is of high efficiency. 
     It is still a further object of the present invention to provide a universal tool rest for a milling planer which is economic to produce. 
    
    
     Other objects and merits and a fuller understanding of the present invention will be obtained by those having ordinary skill in the art when the following detailed description of the preferred embodiment is read in conjunction with the accompanying drawings. 
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a top view of a universal tool rest for a milling planer according to the present invention; 
     FIG. 2 is a sectional view taken along line A--A of FIG. 1; 
     FIG. 3A is a sectional view taken along line B--B of FIG. 1; 
     FIG. 3B is a sectional view taken along the sectional line C--C of FIG. 3A; 
     FIG. 4 show how the universal tool rest is mounted on a milling planer; 
     FIG. 5 is a front view showing an application of the universal tool rest; 
     FIG. 6 is a top view of FIG. 5; 
     FIG. 7 is a front view showing another application of the universal tool rest; 
     FIG. 8 is a top view of FIG. 7; and 
     FIG. 9 is a top view showing a further application of the universal tool rest. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to the drawings and in particular to FIGS. 1 and 2 thereof, the universal tool rest for a milling planer according to the present invention mainly comprises a large housing 1, a small housing 2, a first transmission shaft 3, a second transmission shaft 4 and a third transmission shaft 5. 
     The large housing 1 is provided at the upper end with a connection disc 11 having four holes 12 for the passage of bolts 61 which, in association with nuts 62, may fix the housing 1 on the lower end of a driving stand 6 of the milling planer (see FIG. 4). Since the head of the bolt 61 is received in the T-shaped annular groove, the housing 1 may be adjusted in position as required. Further, the front side of the housing 1 has a connection disc 13 provided with a T-shaped annular groove 14 engage with four bolts 15 (see FIG. 3). On the connection disc 13 there is an angle calibration ring 16. 
     The small housing 2 has a connection disc 21 at the rear side which also has four holes 22 for the passage of the bolts 15 which in association with the nuts 23 may fix the small housing 2 on the large housing 1. Moreover, the small housing 2 may be adjusted in position as required. 
     The transmission shaft 3 is vertically mounted into the housing 1 via a sleeve 31 and two bearings 32, which has a bevel gear 33 at the lower end and a transmission disc 34 at the upper end. The transmission disc 34 has two opposite slots 35 for engaging the driving stand 6 thereby connecting the driving stand 6 with the transmission shaft 3. 
     The transmission shaft 4 is horizontally mounted into the lower part of the housing 1 by means of the front cover 41, the rear cover 42 and the bearings 43. The front end of the transmission shaft 4 extends into the small housing 2 and has a first bevel gear 44 at the front end and a second bevel gear 45 at the intermediate portion. The bevel gear 45 is engaged with the bevel gear 33 of the transmission 3 so that the transmission shaft 3 may drive the transmission shaft 4 to rotate. 
     The transmission shaft 5 is vertically mounted into the small housing 2 via the upper cover 51, the lower cover 52 and the bearings 53. A tool post 55 is fitted into the lower end of the housing 2 by means of a bolt 54. The tool post 55 has at the lower end a threaded hole 56 and an engaging member 57 by the means of which a milling cutter 7 may be mounted thereon by a bolt. In addition, the transmission shaft 5 has a bevel gear 58 for engaging the bevel gear 44 of the transmission shaft 4 such that the transmission shaft 3 may drive the milling cutter 7 via the transmission shafts 4 and 5. 
     FIGS. 5, 6, 7, 8 and 9 show how the universal tool rest works. As illustrated, the housings 1 and 2 may be randomly adjusted in angular position simply by loosening the nuts 62 and 23 hence rendering the universal tool rest to work at any angle. 
     Although the present invention has been described with a certain degree of particularity, it is understood that the present disclosure is made by way of example only and that numerous changes in the construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.