Patent Application
20080230149
1. Field of the Invention
This invention relates to a work feeding and conveying mechanism for a planing machine, particularly to one provided with a conveying device on an intermediate base of a planing machine. The conveying device can be actuated to operate by a transmission device that is coupled with a knife shaft. Thus, a work can be steadily and smoothly conveyed by the. conveying device to be processed with precision.
2. Description of the Prior Art
A conventional planing machine 10, as shown in
However, the two press-convey rollers 133 of the conventional planning machine are respectively positioned at the front and the rear side of the planing knife 132; therefore, when a work is pressed and conveyed, the press-convey rollers 133 and the surface of the work will contact linearly. Thus, when pressed by one press-convey roller 133, the work, due to insufficient support force of the press-convey roller 133, cannot be entirely pressed evenly. In this case, during planing, the front and the rear end of the work may become slightly curved and consequently the work can hardly be planed evenly and smoothly. In addition, as shown in
The objective of this invention is offer a work feeding and conveying mechanism for a planing machine, which includes a conveying device assembled on an intermediate base of a planing machine. The conveying device consists of a front shaft, a rear shaft and a conveying belt. The front shaft is fixed at the front end of the intermediate base, having one end extending outward and assembled thereon with a driven gear connected with a transmission device to be actuated to rotate. The rear shaft is pivotally assembled at the rear end of the intermediate base, able to be actuated to move back and forth horizontally for a preset distance. The conveying belt is fitted around the intermediate base and passes on both the front and the rear shaft, having a rough surface with high friction coefficient. The transmission device consists of a gear set, a transmission shaft and a transmission unit. The gear set is combined with the upper base of the planing machine and coupled with a knife shaft inside the upper base, having its lower side coupled with the transmission shaft, which has the other end connected with the transmission unit positioned at one side of the intermediate base. The transmission unit has one end protruding outward and fixed thereon with a transmission gear coupled with the driven gear of the front shaft of the conveying device. The conveying belt of the conveying device is driven to rotate to feed and convey a work; therefore, when a wood work is conveyed by the conveying belt, its contact and pressed area becomes comparatively large, thus enabling the wood work to be conveyed smoothly and processed precisely. In addition, the transmission device coupled with the knife shaft is driven to operate by the knife shaft, so it is needless to additionally provide any extra power, able to elevate market competitive force.
This invention will be better understood by referring to the accompanying drawings, wherein:
A first preferred embodiment of a work piece feeding and conveying mechanism for a planing machine in the present invention, as shown in
The planing table 20 with a flat upper surface has its periphery fixed with four threaded rods 21 spaced apart and extending upward vertically and its interior installed with a motor (not shown) for producing power.
The intermediate base 30 has its periphery formed with four projections spaced apart and respectively bored with a vertical threaded hole 31 to be respectively and pivotally around the lower end of each threaded rod 21 of the planing table 20. The intermediate base 30 further has its rear end provided with a projecting block 32 having its opposite ends respectively extending out of the intermediate base 30. The projecting block 32 has its opposite ends respectively bored with a through hole 321 and its central portion bored with two slide holes 322. Further, the intermediate base 30 has the central portion of its rear wall bored with two recessed insert holes 33 matching with the two slide holes 322 of the projecting block 32 and has one side pivotally connected with an idle wheel unit 34 composed of an adjusting rod 341 and an idle wheel 342 that is pivotally connected to one end of the adjusting rod 341, which has the other end pivotally positioned on the intermediate base 30 and adjustable in position.
The conveying device 40 mounted on the intermediate base 30 is composed of a front shaft 41, a rear shaft 42 and a conveying belt 43. The front shaft 41 is secured at the front end of the intermediate base 30 by means of two bearing seats 411 and has one end extending outward and assembled thereon with a driven gear 412. The rear shaft 42 is fixed at the read end of the intermediate base 30 by two bearing supports 421 having their front ends secured with a connecting plate 422, which has its opposite ends respectively provided with an adjusting rod 423 extending forward and inserted through the through hole 321 of the projecting block 32 of the intermediate base 30, with two nuts 424 respectively positioned at the opposite sides of the through hole 321 and screwed on the adjusting rod 423. Further, the connecting plate 422 has its lower portion disposed with two slide rails 425 extending outward horizontally to be respectively inserted through the two slide holes 322 and positioned in the two recessed insert holes 33 of the intermediate base 30, letting the connecting plate 422 restrictively positioned by the two recessed insert holes 33 and permitting the rear shaft 42 of the conveying device 40 only to move back and forth horizontally. The conveying belt 43 formed with a rough surface 431 with high friction coefficient is fitted around the intermediate base 30 and passes on both the front shaft 41 and the rear shaft 42.
The upper base 50 assembled on the upper ends of the four threaded rods 21 is provided at a preset location with a rotary handle 51, which can be turned to actuate the threaded rods 21 to rotate and engage with the threaded holes 31 so as to adjust the distance between the upper base 50 and the intermediate base 30, with the upper base 50 moved up and down. The upper base 50 is further provided at a preset location with a knife shaft 52 pivotally connected with a planing knife 53. The knife shaft 52 has one end extending out one side of the upper base 50 and connected with the motor of the planing table 20 so that the planing knife 53 can be driven by the motor to rotate and carry out planing a work. The knife shaft 52 has the other end extending out of the other side of the upper base 50 and connected with the transmission device 60. In addition, the upper base 50 is pivotally connected with two rollers 54 respectively positioned at the front and the rear side of the planing knife 53 and each roller 54 has its upper side provided with an elastic member 541 for elastically pressing the roller 54 downward.
The transmission device 60 is composed of a gear set 61, a transmission shaft 62 and a transmission unit 63. The gear set 61 secured at one side of the upper base 50 consists of a knife shaft gear 611, a worm 612, a guide gear 613 and a worm gear 614. The knife shaft gear 611 is connected with the knife shaft 52 for producing power through the knife shaft 52. The guide gear 613 is firmly fitted on the end of the worm 612 and engaged with the knife shaft gear 611 for actuating the worm 612 to rotate, and the worm gear 614 is engaged with the worm 612. The transmission shaft 62 is firmly fitted in the center of the worm gear 614 and bored with an axial slide groove 621 and the worm gear 614 is secured in the slide groove 621 by a connecting key 6141.
The transmission unit 63 is fixed at one side of the intermediate base 30 and positioned under the gear set 61, consisting of a transmission bevel gear 631, a driven bevel gear 632 and a transmission gear 633. The transmission bevel gear 631 is pivotally fitted on the transmission shaft 62 and restrictively positioned in the slide groove 621 by a connecting key 6311, able to move axially and rotate with the transmission shaft 62. The driven bevel gear 632 is engaged with the transmission bevel gear 631 and connected with the transmission gear 633 positioned at the outer side of the transmission unit 63. The transmission gear 633 is connected with the driven gear 412 of the conveying device 40 by means of a chain 64.
To carry out planing, as shown in
A second preferred embodiment of a work piece feeding and conveying mechanism for a planing machine in the present invention, as shown in
As can be understood from the above description, this invention has the following advantages.
1. The conveying belt of the conveying device has its surface contacting with the surface of a work, able to apply force evenly, conveying the work smoothly and carry out planing process precisely.
2. The rollers pivotally connected with the planing knife are actuated to rotate by the moving work piece so it is needless to additionally provide power source or a gear unit for driving them, lowering cost in producing and repairing a planing machine and elevating market competitive force.
3. The transmission device is directly actuated to operate by the knife shaft, so it is needless to provide an extra power.
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.
