1. Field of the Invention
The present invention relates to a woodworking machine with a sensing device and, more particularly, to a woodworking machine with a sensing device which is able to sense amount of feed of a saw for conversion from the amount of feed of the saw to a value shown by an indicator.
2. Description of the Related Art
Referring to U.S. Pat. No. 6,543,324, it shows a table saw provided having a scale on the upper side thereof adjacent the region of the elongated slot for the circular saw blade. The scale provides an indication of the height of a specified diameter saw blade corresponding to the chordal length of a segment of saw blade protruding through the elongate slot.
However, in order to refer to the scale easily during sawing, the scale must be adjacent to the saw blade. Hence, while a thing desired to be cut is placed on a working surface of the table saw, the scale would be hidden by the thing and user cannot determine the height of the saw blade immediately till removal of the thing from the working surface. Further, it produces a lot of wood flour during sawing, and the wood flour would hide the scale. In the meanwhile, user might push the wood flour aside at will to expose the scale outside, and it's easy to get hurt by the saw blade.
Accordingly, the object is achieved by providing a woodworking machine with a sensing device which has an indicator, the woodworking machine comprising a base, an active adjustment unit, a driven adjustment unit, an actuating device and a saw.
The sensing device is able to convert an amount of feed of the saw to a precise value to be read on the indicator.
The sensing device further includes a cover to prevent wood flour of a thing desired to be cut or dust from covering on the driven adjustment unit and the sensing device.
The sensing device is installed to the driven adjustment unit directly to avoid the measurement errors certainly.
Other advantages and features of the present invention will become apparent from the following descriptions referring to the drawings.
The present invention will be described through detailed illustration of three embodiments referring to the drawings.
Referring to
The base 10 includes a lateral wall 11, a coupled wall 12 and a working surface 13, where a thing desired to be cut is placed on, provided on the top surface of the lateral wall 11 and having a slot 131 inserted by the saw 60 and an indicator 132 showing sensor data which is determined by the sensing device 40. The active adjustment unit 20 is inserted through the lateral and coupled walls 11 and 12. The driven adjustment unit 30 is inserted though the coupled wall 12 and engaged with the active adjustment unit 20. The sensing device 40 is able to sense and measure what's a displacement distance of the driven adjustment unit 30 by adjusting, and further convert the measured displacement distance to a signal to transfer to the indicator 132. The driven adjustment unit 30 is coupled to the actuating device 50 and drives the actuating device 50 to move longitudinally with respect to the working surface 13. The saw 60, which is connected to the actuating device 50 and protrudes from the slot 131, is able to move longitudinally with respect to the actuating device 50. The sensing device 40 is installed to the driven adjustment unit 30 directly to avoid the measurement errors certainly.
The coupled wall 12 has two lugs 121 formed from the bottom thereof and spaced from each other. An aperture 1211 is formed on each lug 121. A limited rod 122 is provided at a side of the coupled wall 12 and the two lugs 121 is provided at another side of the coupled wall 12 which is sandwiched between the limited rod 122 and the two lugs 121. An upper end and a lower end of the coupled wall 12 are connected to each other via the limited rod 122. A receptacle 123, a first limited element 124 and a second limited element 125 are formed on the coupled wall 12 between the lugs 121 and the limited rod 122. The receptacle 123 is adjacent to the limited rod 122; the first limited element 124 is adjacent to the lugs 121; the first and second limited elements 124 and 125 are respectively provided at the upper and lower ends of the coupled wall 12. Bearings 1241 and 1251 are respectively provided in the first and second limited elements 124 and 125.
Further referring to
The driven adjustment unit 30 includes a bolt 31 and a second helical gear 32. A first axial portion 311 and a second axial portion 312 are respectively formed on two ends of the bolt 31, and a threaded portion 313 are formed on the outer periphery of the bolt 31 between the first and second axial portions 311 and 312. The first and second axial portions 311 and 312 are respectively inserted into the bearings 1241 and 1251 of the first and second limited elements 124 and 125. The first axial portion 311 is coupled to the second helical gear 32 which is engaged with the first helical gear 22. The driven adjustment unit 30 intersects with the active adjustment unit 20 vertically.
Referring to
The actuating device 50 includes a main body 51, a motor 52, a main axle 53 and a belt 54. A side of the main body 51 forms with a first receiving hole 511 and a second receiving hole 512. A threaded sleeve 513 is provided in the first receiving hole 511 and forms with a threaded hole 5131. The threaded portion 313 of the bolt 31 is engaged with the threaded hole 5131 in a screw manner. A bushing 514 is provided in the second receiving hole 512 and mounted on the limited rod 122. The main body 51 of the actuating device 50 is able to be adjusted via the driven adjustment unit 30 and moves with respect to the limited rod 122 longitudinally. The motor 52 is fixed to the main body 51 and includes an axle center 521 which is coupled to an active belt pulley 521. The main axle 53 is located on the top of the main body 51 and includes an axle center 530 which is coupled to a driven belt pulley 531. The belt 54 is wound on the active and driven belt pulleys 521 and 531. The active belt pulley 521 of the motor 52 drives the driven belt pulley 531 of the main axle 53 to rotate. In other words, the main axle 53 is driven by the motor 52 via the belt 54. A splash guard 532 is fixed to a distal end of the main axle 53.
The saw 60 forms with a through-hole 61 on the center thereof. The axle center 530 of the main axle 53 is inserted through the through-hole 61 of the saw 60. A fixture element 56 is engaged with the distal end of the axle center 530 to fix the saw 60 to the main axle 53 and a distance piece 55 is provided between the fixture element 56 and the saw 60 for a firm engagement of the saw 60 and the fixture element 56. The saw 60 is able to move longitudinally along the receptacle 123 with the actuating device 50. An end of the splash guard 532 is fixed to the distal end of the main axle 53 and another end of the splash guard 532 is partially and annularly provided on the outer periphery of the saw 60.
Referring to
While several embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that modifications may be made therein without departing from the scope and spirit of the present invention.