Woodworking machine

Abstract

In a circular saw etc having a machine frame (1) on which a table board (2) is accommodated, and further having a swivel frame (12) arranged underneath the table board (2), which can be swivelled about a swivel axis coplanar with the top side of the table board (2), which swivel frame (12) accommodates a height adjustable tool bracket (11) carrying at least one cutting tool engaging an associated slot in the table board, which tool can be clamped onto a shaft drivable by a motor attached to the tool bracket, a high degree of user-friendliness, serviceability and accuracy can be obtained in that the swivel frame (12) in the region of its ends, which in cutting direction lie opposite each other, is swivel-suspended on bearing brackets (14) which are mountable on the bottom side of the table board (2), and can be swivelled by means of an articulated adjusting rod (17) arranged with a degree of freedom for tilting movements, and further in that the tool bracket (11) accommodated on the swivel frame (12) can be height adjusted by means of an adjusting element provided on the swivel frame (12), such adjusting element being arranged in driving linkage with an extendable articulated shaft (32), and further in that the adjusting rod (17) and the articulated shaft (32) can be operated by at least one actuating means (16) or (37), respectively, which is firmly mounted on the operating side of the machine frame (1).

Description

BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 shows a view of the operator side of a circular saw according to the invention with removed inspection cover and a partly broken out front wall;

FIG. 2 shows a longitudinal section of the arrangement according to FIG. 1;

FIG. 3 shows a schematic top view of the arrangement according to FIG. 1 with the table board removed;

FIG. 4 shows a perspective view of the swivel frame with integrated tool bracket and the associated bearing brackets;

FIG. 5 shows a view of a scoring unit which can be attached to the swivel frame; and

FIG. 6 shows a view of the circular saw according to the invention corresponding to FIG. 1 with fitted inspection cover comprising display units.

Claims

1. A woodworking machine, in particular a circular saw, having a machine frame on which a table board is accommodated, and further having a swivel frame arranged underneath the table board, which can be swivelled about a swivel axis coplanar with the top side of the table board, which swivel frame accommodates a height adjustable tool bracket carrying at least one cutting tool engaging an associated slot in the table board, which tool can be clamped onto a shaft drivable by a motor attached to the tool bracket, wherein the swivel frame in the region of its ends, which in cutting direction lie opposite each other, is swivel-suspended on bearing brackets which are mountable on the bottom side of the table board, and can be swivelled by means of an articulated adjusting rod arranged with a degree of freedom for tilting movements, and further in that the tool bracket accommodated on the swivel frame can be height adjusted by means of an adjusting element provided on the swivel frame, such adjusting element being arranged in driving linkage with an extendable articulated shaft, and further in that the adjusting rod and the articulated shaft can be operated by at least one actuating means, respectively, which is firmly mounted on the operating side of the machine frame.

2. A woodworking machine as claimed in claim 1, wherein the adjusting rod associated with the swivel frame may be designed as a threaded spindle which on one side engages a nut which is swivel-mounted in the swivel frame, and in axial direction accommodated stationary in the same, and is on the other side swivel-mounted about the axle of the associated actuating means and acts together with the associated actuating means via an angle drive.

3. A woodworking machine as claimed in claim 2, wherein the nut is designed as a pin which is provided with a tapped hole extending transverse to its axis, such pin being mounted on a fork shaped bearing of the swivel frame and movable about its axis.

4. A woodworking machine as claimed in any of the preceding claims, wherein the adjusting element associated with the tool bracket is designed as a threaded spindle which is provided on the swivel frame in a vertical position, which threaded spindle engages a nut firmly attached to the tool bracket and, via an angle drive, is connected with an articulated shaft provided with joints at both ends thereof.

5. A woodworking machine as claimed in claim 4, wherein the swivel frame is provided with vertical adjusting rods on which the tool bracket with associated guide bushes is arranged for sliding adjustment.

6. A woodworking machine as claimed in claim 1, wherein the articulated shaft is joined to a drive wheel which is connected in driving linkage with an associated actuating element via a circulating element and swivel-mounted on the inner side of the operator-side wall of the machine frame.

7. A woodworking machine as claimed in claim 1, wherein associated with the adjusting rod and the articulated shaft is an actuating element, respectively) and that the actuating elements are preferably arranged at a certain lateral distance and at the same height level.

8. A woodworking machine as claimed in claim 1, wherein the articulated shaft comprises two shaft sections having multi edge areas preferably formed integral therewith which engage each other in a telescope-like manner.

9. A woodworking machine as claimed in claim 1, wherein the swivel frame is designed as a casting comprising a vertical wall which is provided with at least one window opening toward the top through which extends a shaft carrying a tool, and which wall, on the side away from the tool comprises a projection which accommodates the vertical threaded spindle associated with the tool bracket and forming the adjusting element, and further possesses guiding means associated with the tool bracket.

10. A woodworking machine as claimed in claim 9, wherein the swivel frame, on its tool side, is provided with a marginal flange extending at least laterally and along the bottom to which a cover plate is attached which limits a chamber associated with the tool.

11. A woodworking machine as claimed in claim 10, wherein the swivel frame is provided with a connector branching off from the chamber and connecting a suction line which can preferably be moved out from the housing-like machine frame via a sleeve.

12. A woodworking machine as claimed in claim 9, wherein the vertical wall of the swivel frame, on the side away from the machine tool, is provided with ribs limited by a circumferential rim flange, such ribs forming two chambers which flank the window and extend over the entire height of the wall, and to each of which chamber an adjusting rod for guiding the tool bracket is associated with said rods being attached with their ends on the rim flange side.

13. A woodworking machine as claimed in claim 1, wherein the bearing brackets receiving the swivel frame are provided with a segment groove which is engaged in a groove and tongue manner by segment-shaped bearing strips attached to the swivel frame.

14. A woodworking machine as claimed in claim 1, wherein the tool bracket is designed as a casting comprising a vertical wall which on one side is provided with projections having guide bushes, as well as a bearing device associated with the shaft carrying the tool and, on the other side, with a projection comprising the nut acting together with the associated threaded spindle.

15. A woodworking machine as claimed in claim 1, wherein the shaft mounted on the tool bracket and carrying the tool is connected in a linkage drive via a stepping down unit with the associated motor which is adjustably mountable on the tool bracket.

16. A woodworking machine as claimed in claim 14 or 15, wherein the wall of the tool bracket on the side away from the swivel frame is provided with ribs to which a support plate is adjustably mounted which carries the motor.

17. A woodworking machine as claimed in claim 1, wherein the swivel frame is provided with a fixture for attaching a scoring unit comprising a scoring tool drivable by means of a motor and flush with the tool of the tool bracket.

18. A woodworking machine as claimed in claim 17, wherein the scoring unit is provided with an add-on shield which is screw-mountable on associated mandrels preferably in an adjustable manner, such add-on shield accommodating the motor, on the one hand, and a support block, on the other hand, which accommodates an adjusting block adjustable in height and comprising the scoring unit, such adjusting block accommodating the axially adjustable shaft of the scoring unit.

19. A woodworking machine as claimed in claim 18, wherein the adjusting block is provided with adjusting screws which are accessible from the top via associated holes in the table board and/or in the swivel frame.

20. A woodworking machine as claimed in claim 1, wherein provision is made for an angle display unit and a height display unit, each of them comprising a pointer and a scale, with one of these elements being attached in the area of an associated window of the operator side wall of the machine frame, and the other element, in the case of the angle display unit, being attached to the swivel frame and in the case of the height display unit being attached to the tool bracket