Patent Application
20120132319
1. Field of the Invention
The present invention relates to a two-sided wood working planner.
2. Description of the Prior Art
A conventional wood working planner comprises a base and an adjustment seat. The base includes a worktable thereon. The worktable includes a plurality of screws on a circumferential portion thereof. The adjustment seat has a plurality of threaded holes corresponding to the screws. The adjustment seat is mounted above the worktable. The user can rotate the adjustment wheel to move the screws upward or downward for adjusting the position of the adjustment seat. However, there will be backlash formed between the threads, namely, there will be a gap between the threads of the screw and the threaded hole. During operation, the wood working planner vibrates easily, which will influence the working quality. Besides, the adjustment seat is heavy. It is not easy to adjust the adjustment seat. In particular, when the adjustment seat is moved upward, subject to the gravity, the user will need much strength to do the adjustment. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve this problem.
The primary object of the present invention is to provide a two-sided wood working planner. The two-sided wood working planner comprises a base. The base comprises a worktable thereon. The worktable includes a plurality of straight screws on a circumferential portion thereof. The screws are parallel to each other. The two-sided wood working planner further comprises an adjustment seat which is disposed above the worktable. The adjustment seat has a plurality of threaded holes corresponding to the screws. The screws are screwed to the threaded holes. The adjustment seat is mounted above the worktable and adjustable. The two-sided wood working planner further comprises at least two auxiliary pressure cylinders each having a pressure cylinder body. Two ends of the pressure cylinder body are connected to the base and the adjustment seat, respectively. The pressure cylinder body has a prestressing force to lift the adjustment seat with respect to the base. Thereby, through the prestressing force of the auxiliary pressure cylinders, the flank at one side of threads of the screw is against the corresponding flank of threads of the threaded hole to eliminate the backlash between the threads so as to prevent the adjustment seat from vibrating during the operation of the two-sided wood working planner. The present invention can enhance the working quality. The user can adjust the position of the adjustment seat through the adjustment wheel without much strength because the auxiliary pressure cylinders have the prestressing force to lift the adjustment seat with respect to the base to counteract a part of the gravity. It is labor-saving to adjust the adjustment seat upward or downward.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
As shown in
The base comprises a worktable 11 thereon. The worktable 11 includes a plurality of straight screws 12 on a circumferential portion thereof. The screws 12 are connected with an adjustment wheel 13. The adjustment wheel 13 can be rotated to move the screws 12.
The adjustment seat 20 is disposed above the worktable 11. The adjustment seat 20 has a plurality of threaded holes 21 corresponding to the screws 12. The screws 12 are screwed to the threaded holes 21, such that the adjustment seat 20 is mounted above the worktable 11 and can be adjusted upward or downward.
Each auxiliary pressure cylinder 30 has a pressure cylinder body 31. The pressure cylinder body 31 can be a pneumatic cylinder or an oil pressure cylinder. Two ends of the pressure cylinder body 31 are connected to the base 10 and the adjustment seat 20, respectively. The pressure cylinder body 31 has a prestressing force to lift the adjustment seat 20 with respect to the base 10. In this embodiment, each screw 12 of the two-sided wood working planner 100 is provided with one auxiliary pressure cylinder 30. The pressure cylinder body 31 of the auxiliary pressure cylinder 30 is parallel to the corresponding screw 12 and disposed at one side of the adjustment seat 20 close to the corresponding screw 12. Two ends of the pressure cylinder body 31 are pivotally and transversely connected with a pair of fixing bolts 32. Through the fixing bolts 32, the two ends of the pressure cylinder body 31 are connected to the base 10 and the adjustment seat 20, respectively. The fixing bolt 32 connected to the adjustment seat 20 is first connected to a fixing plate 33 and then connected to the adjustment seat 20 through the fixing plate 33.
The user can adjust the position of the adjustment seat 20 through the adjustment wheel 13 without much strength because the auxiliary pressure cylinders 30 have the prestressing force to lift the adjustment seat 20 with respect to the base 10 to counteract a part of the gravity. It is labor-saving to adjust the adjustment seat 20 upward or downward.
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.
