1. Field of the Invention
This invention relates to a manual planer, particularly to one provided with an elevating device simple in structure and able to quickly and accurately adjust and fix its worktable in position.
2. Description of the Prior Art
Generally, a conventional planer is provided with an elevating device for adjusting the position of a work piece to be processed. The elevating device of the conventional planer is provided with an elevating rod able to be actuated to move up and down for driving a support shaft to move and quickly adjust the position of the worktable of the planer. The elevating device is further disposed with a micro-adjusting rod for carrying out micro-adjustment for the worktable. By so designing, the elevating device of the conventional planer is able to carry out quick adjusting, and micro-adjusting and positioning for the worktable of the planer. However, in adjusting of the worktable, the elevating device has to carry out quick positioning first, and then micro-adjust and fixing the level of the worktable; therefore, it is necessary to take much time to carry out such two-step adjusting and positioning. In addition, the elevating device is located under a movable worktable so a user has to apply force from under for carrying out adjusting of the movable worktable, resulting in much inconvenience in operating and using.
The objective of this invention is to offer an elevating device for the worktable of a manual planer, including at least one base, one movable worktable and one elevating device. The elevating device is composed of a driving shaft, a driven shaft, a rotary base, a connecting rod base, a combining shaft and a spindle. When an operating member of the driving shaft is rotated, a driving gear of the driving shaft will drive a first driven gear of the driven shaft to rotate, and a second driven gear of the driven shaft will drive a third driven gear of the rotary base to rotate at the same time. When the rotary base is rotated relatively with the spindle serving as a pivot, the connecting rod base will be actuated to operate, and the movable worktable positioned on the connecting rod base will be moved upward or downward and adjusted in its position. The elevating device for the worktable of a manual planer of this invention is simple in structure and able to adjust the position of the worktable with only one step operation. In addition, the operating member of the driving shaft can be turned with less force, convenient in use. Moreover, during carrying out adjusting of the planer, the elevating device of this invention can quickly and accurately adjust and fix the worktable in position.
This invention will be better understood by referring to the accompanying drawings, wherein:
A first preferred embodiment of an elevating device for the worktable of a manual planer in the present invention, as shown in
The base 10 has its right side bored with a through insert hole 11.
The movable worktable 20 is slidably assembled at the end of the right side of the base 10.
The elevating device 30 is composed of a driving shaft 31, a driven shaft 32, a rotary base 33, a connecting rod base 34, a combining shaft 35 and a spindle 36.
The driving shaft 31 has its front end provided with an operating member 311 composed of a rotary wheel 3111 and a handle 3112 pivotally fixed on the rotary wheel 3111 for a user to hold thereon and carry out adjusting of the movable worktable 20. Referring to
The driven shaft 32 is positioned under the driving shaft 31 and vertically intersecting with the driving shaft 31. The driven shaft 32 has one side provided with a first driven gear 321 made of a worm gear at a location corresponding to the driving gear 312 of the driving shaft 31, with the first driven gear 321 engaged with the driving gear 312. The driven shaft 32 has the other side provided with a second driven gear 322 made of a worm.
The rotary base 33 is to be assembled on the second driven gear 322 of the driven shaft 32, having its bottom disposed with a third driven gear 331 made of a sector worm gear to match with the second driven gear 322 of the driven shaft 32 so that the third driven gear 331 and the second driven gear 322 can be engaged with each other. Further, the rotary base 33 has its topside formed with a rotary member 332 axially bored with an insert hole 3321, a first through hole 333 between the third driven gear 331 and the insert hole 3321, and a second through hole 334 between the insert hole 3321 and the first through hole 333.
The connecting rod base 34 is bored with a threaded hole 341 at a location corresponding to the second through hole 334 of rotary base 33, secured at the front side of the rotary base 33 by means of a screw 342. The connecting rod base 34 has its upper side axially bored with a combining through hole 343 at a location matching with the insert hole 3321 of the rotary base 33 and a through shaft hole 344 at a location tallying with the first through hole 333 of the rotary base 33. The movable worktable 20 is axially assembled on the topside of the connecting rod base 34. In addition, the connecting rod base 34 has its central opposite sides respectively and longitudinally fixed thereon with a positioning block 345 at a location matching with the movable worktable 20. The positioning blocks 345 have their upper sides respectively formed with a slope of 45 degrees for restricting the movable worktable 20 to move upward or downward within 45 degrees.
The combining shaft 35 is to be axially inserted through both the insert hole 3321 of the rotary base 33 and the combining hole 341 of the connecting rod base 34, having its opposite ends respectively provided with threads 351 secured thereon with a nut 352 for fixing the combining shaft 35 at the upper sides of the rotary base 33 and the connecting rod base 34. The combining shaft 35 is also inserted through the opposite sides of the movable worktable 20 so as to push and actuate the movable worktable 20 to move upward and downward.
The spindle 36 is axially inserted through the first through hole 333 of the rotary base 33 and secured in the shaft hole 344 of the connecting rod base 34.
In operating and using, referring to
A second preferred embodiment of an elevating device for the worktable of a manual planer in the present invention, as shown in
A third preferred embodiment of an elevating device for worktable of a manual planer in the present invention, as shown in
Evidently, the elevating device for the worktable of a manual planer in the present invention is simple in structure and able to adjust the position of the worktable of the manual planer with only one step operation, and the operating member of the driving shaft can be operated with less force, convenient in use. Additionally, the worktable of the manual planer can be quickly and accurately adjusted and fixed in position by the elevating device of this invention.
While the preferred embodiments of the invention have been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.