Patent Application
20210008752
The present invention relates to a blade structure for an automatic planer, and more particularly to an adjustable multi-section blade structure for an automatic planer.
The cutter shaft structure of a conventional automatic planer includes a cutter shaft, a plurality of blades, and a plurality of cutter holders. The cutter shaft has an outer annular surface. The cutter holders are disposed at substantially equiangular intervals around the outer annular surface of the cutter shaft. Each blade is locked to a corresponding cutter holder by a plurality of positioning pins. The precision of the blade is maintained by the positioning pins, and the length of the blade is always the same as the length of the cutter holder.
However, when the automatic planer is used for cutting, the cutting load is large because the blade of the cutter holder is in the form of a whole piece. When the machine is rotated at a high speed, the machine must output more power to drive its rotation. The precision of the blade cannot be achieved after the blade is sharpened. As a result, the blade becomes dull and can no longer be sharpened. If the blade is damaged due to wear, the entire blade needs to be replaced, which increases the cost of replacing the components. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.
The primary object of the present invention is to provide an adjustable multi-section blade structure for an automatic planer to reduce the cutting load. When the blade becomes dull, it can be sharpened and calibrated. The precision of the blade can be maintained without replacing the entire blade. In addition, the cost of replacing the components can be reduced, and the energy-saving effect can be achieved.
In order to achieve the objects, an adjustable multi-section blade structure for an automatic planer is provided. The adjustable multi-section blade structure comprises a cutter shaft, a plurality of cutter holders, a plurality of cutters, and a blade calibration tool. The cutter shaft is a long cylinder. The cutter shaft has an outer annular surface. Either end of the cutter shaft is provided with a transmission rod. The cutter holders are disposed on the outer annular surface of the cutter shaft. The cutter holders are arranged at substantially equiangular intervals around the outer annular surface of the cutter shaft. The cutter holders each have a fixing surface and a bearing surface. The fixing surface is provided with a plurality of first fixing units. The cutters are spaced apart from each other and disposed on the fixing surface. The cutters each include a blade, a pressing plate, a positioning member, and a fixing member. The blade has a first positioning unit and a second fixing unit. The pressing plate has a second positioning unit and a third fixing unit. The positioning member is inserted through the first positioning unit and the second positioning unit to combine the blade and the pressing plate into each of the cutters. The fixing member is inserted through the second fixing unit and the third fixing unit to screw each of the cutters to the fixing surface. The blade calibration tool includes a main body. The main body has a first recess. A bottom of the first recess is provided with a second recess. A bottom of the second recess has an opening. The bottom of the second recess is provided with a pair of positioning posts at two sides of the opening. The main body has a first positioning surface close to the first recess. The main body has a second positioning surface close to the second recess. When the cutters need to be calibrated, the blade and the pressing plate are respectively placed in the first recess and the second recess, the pressing plate abuts against the second positioning surface, and the blade abuts against the first positioning surface for calibrating the precision of the cutters. The opening is configured for the positioning member to secure the blade and the pressing plate together.
As to the adjustable multi-section blade structure for the automatic planer provided by the present invention, the cutters are spaced apart from each other and disposed along the axis of the cutter shaft to reduce the cutting load. After the blade is sharpened, it can be calibrated by the blade calibration tool to maintain the precision of the blade without replacing the entire blade. This way can reduce an unnecessary waste. In addition, the cost of replacing the components can be reduced, and the energy-saving effect can be achieved.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
The cutter shaft 10 is a long cylinder. The cutter shaft 10 has an outer annular surface 11 and an axis 12. Either end of the cutter shaft 10 is provided with a transmission rod 13.
In this embodiment of the present invention, the number of the cutter holders 20 is four. The cutter holders 20 are disposed on the outer annular surface 11 of the cutter shaft 10. The cutter holders 20 are arranged at substantially equiangular intervals around the outer annular surface 11 of the cutter shaft 10. Each of the cutter holders 20 has a fixing surface 21, a bearing surface 22, and an arcuate groove 23. The fixing surface 21 is provided with a plurality of first fixing units 24. In this embodiment of the present invention, each of the first fixing units 24 includes two limiting holes 25 and two screw holes 26. The two limiting holes 25 are spaced apart from each other. The two screw holes 26 are spaced apart from each other and located at two sides of the two limiting holes 25. The fixing surface 21 is perpendicular to the bearing surface 22. The bearing surface 22 is disposed at one side of the fixing surface 21. The arcuate groove 23 is disposed at another side of the fixing surface 21.
Referring to
The blade calibration tool 40, referring to
Referring to
It is worth mentioning that because there is a gap between the pressing plate 32 and the second recess 43, the pressing plate 32 can be pushed toward the second positioning surface 48 through the gap, so that the two legs 39 respectively abut against the second positioning surface 48. There is a gap between the blade 31 and the first recess 42. The blade 31 is pushed toward the first positioning surface 46 through the second limiting groove 49. At this time, the blade 31 can be accurately positioned on the first positioning surface 46 through the first limiting groove 47 to reduce the contact area. When the blade 31 is moved, the second fixing unit 36 in an elliptical shape provides a movement range for the blade 31.
Referring to
It is worth mentioning that the overall length of the blade 31 after being sharpened is shortened. As shown in
The first positioning surface 46 is provided with the first limiting groove 47, so that the edge of the blade 31 can be attached to the first positioning surface 46. The second positioning surface 48 is provided with the second limiting groove 49 for the user to push the blade 31 toward the first positioning surface 46. The operation is convenient and fast.
When one of the blades 31 is damaged or worn, it is only necessary to sharpen and calibrate the blade 31 to reduce an unnecessary waste. Since the blades 31 are arranged at intervals on each fixing surface 21, the cutting load can be reduced, thereby achieving an energy-saving effect.
Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.
