Patent Application
20130269964
1. Field of the Invention
The present invention relates to a tool machine.
2. Description of the Prior Art
A conventional polishing machine comprises a base which is provided with a convey belt at a predetermined upper position. One side of the base is provided with a motor unit which is used to drive an abrasive wheel of a cylinder unit to polish a workpiece. Two ends of the abrasive wheel have protruding spindles to be pivoted to bearing seats by means of bearings and buckle rings. One of the spindles is connected to a transmission wheel with an embedded-head screw. Because the bearing seats are respectively coupled to the frame of the polishing machine and the transmission wheel is wound by a belt or a chain, it is required to detach the belt, the transmission wheel and the bearing seats at the two ends in sequence when replacing the abrasive wheel. This replacement way is troublesome and takes a lot of time, and the labor cost in increases. 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 a main shaft structure of a tool machine. The cutter wheel unit of the tool machine can be detached from the tool machine quickly.
In order to achieve the aforesaid object, the main shaft structure of the tool machine comprises a base, a worktable, a motor fixing seat, a cutter seat, and a cutter wheel unit.
The worktable is mounted on the base. The worktable comprises a positioning board upright extending from a bottom thereof.
The motor fixing seat is upright connected to one side of the base. One side of the motor fixing seat is provided with a motor unit. The motor unit has an output axle. One end of the output axle is connected with a first connection member.
The cutter seat is connected to another side of the motor fixing seat opposite to the motor unit and located above the worktable. The cutter seat comprises a first casing board at one end thereof adjacent to the motor fixing seat, a second casing board at an opposing end thereof, two side casing boards connected between the first casing board and the second casing board, and an accommodation space defined between the first casing board, the second casing board and the two side casing boards. The first casing board and the second casing board respectively have bearing recesses and first positioning portions close to the bearing recesses.
The cutter wheel unit is coupled to the cutter seat. The cutter wheel unit is disposed in the accommodation space. The cutter wheel unit comprises an axial pivot axle. The pivot axle extends out of the cutter seat. Two ends of the pivot axle are provided with bearing seats. The bearing seats are placed into the bearing recesses. The bearing seats have second positioning portions corresponding to the first positioning portions. The first positioning portions are engaged with the second positioning portions. The pivot axle is provided with a second connection member corresponding to the first connection member of the motor unit. The second connection member is engaged with the first connection member so that the cutter wheel unit is driven by the motor unit.
Preferably, the first positioning portions of the cutter seat are threaded holes and the second positioning portions are through holes. A plurality of screws are inserted through the second positioning portions and screwed to the first positioning portions to secure the bearing seats on the cutter seat.
Preferably, the first connection member of the motor unit is a male tenon and the second connection member of the cutter wheel unit is a female mortise to engage with the first connection member.
Preferably, the first connection member has a central axial hole for insertion of the output axle. The first connection member has a plurality of threaded holes around a circumferential wall thereof. The threaded holes communicate with the axial hole. A plurality of fixing members are screwed to the threaded holes. The bottom ends of the fixing members are against a circumferential wall of the output axle so that the first connection member is connected to the output axle. When the fixing members are loosened, the bottom ends of the fixing members are not against the circumferential wall of the output axle so that the first connection member can be moved on the output axle.
Preferably, the bearing seats each have a bearing portion. The bearing portion has a stop block at one side thereof. The stop blocks of the bearing seats lean against the inner walls of the bearing recesses.
Preferably, the motor unit is a variable-speed motor.
Preferably, the two side casing boards of the cutting seat have two pairs of first adjustment holes. The two pairs of first adjustment holes are connected with two first limit members. The bottom ends of the two limit members are connected with two press rods. The two press rods are located above the worktable. The height of the limit members relative to the cutting seat is adjustable by different positions where the limit members are connected to the first adjustment holes.
Preferably, the worktable comprises the positioning board upright extending from its bottom thereof. The positioning board is attached to another side of the base opposite to the motor fixing seat. The positioning board has a plurality of second adjustment holes for engagement of a plurality of screws to be secured to the base. The second adjustment holes can be displaced on the screws and positioned by the screws so as to adjust the height of the worktable relative to the base. The side of the base, adjacent to the motor fixing seat, is provided with an adjustment unit. The adjustment unit comprises an adjustment rod. The adjustment rod leans against the underside of the worktable. The adjustment rod has a flat surface and a curved surface. One side of the adjustment rod is vertically connected with a pull handle. The pull handle brings rotation of the adjustment rod with the different surfaces to lean against the underside of the worktable to adjust the height of the worktable relative to the base.
Thereby, the cutter wheel unit of the present invention can be detached from the cutter seat quickly to enhance work efficiency and to save work time.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
As shown in
The worktable 20 is mounted on the base 10. The worktable 20 comprises a positioning board 21 upright extending from a bottom thereof.
The motor fixing seat 30 is upright connected to one side of the base 10. One side of the motor fixing seat 30 is provided with a motor unit 31.
The motor unit 31 is a variable-speed motor which has different rotational speeds for cutting. As shown in
The cutter seat 40 is connected to another side of the motor fixing seat 30 opposite to the motor unit 31 and located above the worktable 20. The cutter seat 40 comprises a first casing board 41 at one end thereof adjacent to the motor fixing seat 30, a second casing board 42 at an opposing end thereof, two side casing boards 43 connected between the first casing board 41 and the second casing board 42, and an accommodation space 44 defined between the first casing board 41, the second casing board 42 and the two side casing boards 43. The first casing board 41 and the second casing board 42 respectively have bearing recesses 411, 421 and first positioning portions 412, 422 close to the bearing recesses 411, 421. In this embodiment, the first positioning portions 412, 422 are threaded holes. The two side casing boards 43 of the cutting seat 40 has two pairs of first adjustment holes 431 which are disposed close to the first casing board 41 and the second casing board 42. The two pairs of first adjustment holes 431 are connected with two first limit members 45. Each limit member 45 has two through holes 451 at a bottom thereof. The through holes 451 of the two limit members 45 are connected with two press rods 46. The two press rods 46 are located above the worktable 20. When a workpiece (not shown in the drawing) is polished on the worktable 20, the two press rods 46 hold the workpiece on the worktable 20. The distance between the two press rods 46 can be adjusted by the position of the through holes 451 for workpieces in different sizes. The height of the limit members 45 relative to the cutting seat 40 can be adjusted by different positions where the limit members 45 are connected to the first adjustment holes 431.
The cutter wheel unit 50 is coupled to the cutter seat 40. The cutter unit 50 comprises a cutter wheel 51 corresponding to the output axle 311. The cutter wheel 51 is disposed in the accommodation space 44. The cutter wheel 51 comprises an axial pivot axle 52. Two ends of the pivot axle 52 are provided with bearing seats 53. The bearing seats 53 are placed into the bearing recesses 411, 421 to be confined therein. As shown in
The bearing seats 53 of the cutter wheel unit 50 are placed in the bearing recesses 411, 412 of the cutter seat 40 to be positioned thereat, and the screws 534 are inserted through the second positioning portions 533 and screwed to the first positioning portions 412, 422 to secure the bearing seats 53 of the cutter wheel unit 50 on the cutter seat 40. The second connection member 54 of the cutter wheel unit 50 is connected with the first connection member 312 of the motor unit 31, so that the cutter wheel unit 50 is driven by the motor unit 31 to turn. When the user wants to detach the cutter wheel unit 50 from the cutter seat 40, the screws 534 which connect the cutter wheel 51 and the cutter seat 40 are first loosened and then the fixing members 315 on the first connection member 312 are loosened, so that the fixing members 315 are not against the circumferential wall of the output axle 311 and the first connection member 312 can be moved on the output axle 311 to form an operation space for detachment. Thus, the cutter wheel unit 50 of the present invention can be detached from the cutter seat 40 quickly to enhance the assembly efficiency and to save work time.
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.
