JPH091507A - Hand holding type wood planing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the production cost of a portable planer having a planer spindle, a groove for fixing a cutter and a clamping body, which require precison-work. SOLUTION: A clamping body 64 is made to be rotationally symmetrical, in particular conical and guided adjustably nearly radially to a planar spindle 20 in the conical recess 36 of the planer spindle 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held plane board of the type described in the preamble of claim 1.

[0002]

According to the specification of EP 0130592,
A milling tool, in which a vertical groove for receiving a cutting edge is formed on the peripheral surface of the cylindrical body, in which case a wedge-shaped cross section strip is supported by the cutting edge surface from the side to cut. It is known that the blade is pressed against the side surface of the groove in the groove and tightened. The wedge-shaped strip, also referred to as the clamping body, is clamped tightly against the body and against the cutting edge by means of clamping screws which are screwed radially into the cylindrical body.

In principle, the same construction as the above-mentioned milling tool is known for the plane axis of a handheld plane.

The function of this type of plane board is satisfactory. However, the disadvantage is that the plane press has two very precisely machined groove flanks, because the strip-shaped press body must be finished very accurately and the press body is received together with the plane cutter. , It must have a precision-machined groove across the entire width of the plane. One flank of the groove serves for abutting the plane cutter and the other flank serves for supporting the clamping body.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a handheld plane which eliminates the above-mentioned drawbacks of the prior art.

[0006]

According to the invention, the above-mentioned object is achieved by means having the features of claim 1.

[0007]

The plane of the present invention having the features of claim 1 or the plane of the plane of the board having the features of claim 9 has a rotationally symmetrical frustoconical shape instead of the strip-shaped tightening body. The tightening means are used, and the plane axis is correspondingly a narrow groove with only one groove flank precisely machined for receiving the plane cutter instead of the wide precision machined groove. And instead of the other groove flank, it only has a recess for receiving the press body, which can be easily produced, for example by drilling.

Due to the narrow width of the plane board, it has a relatively large, completely closed peripheral surface and thus a higher strength. This also significantly reduces noise generation due to air turbulence due to the high speed rotating plane board. Further, this plane shaft can be manufactured at low cost, and a standard component such as a conical ring and a standard screw screwed through the conical ring can be used as the tightening body. This makes it possible to manufacture the plane board shaft more cost effectively.

It is particularly advantageous to use a screw with a spherical conical head as the clamping body.

Further advantageous configurations of the invention are as described in the other claims.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The handheld plane 10 shown in FIG. 1 has a plane casing 12 having a motor casing 14 and a handle 16 attached thereto, the handle being an electrical machine. It has a switch operation key 18. A plane board shaft 20 is arranged in the plane board casing 12 and is rotatably supported around an axis 23. The plane board shaft 20 supports two cutters 22, 22 ', whose cutting edges 24, 24' define a cutting edge circle 26. The cutting edge circle 26 projects from the bottom surface 28 and defines the distance, and thus the cutting depth, of the cutting edge circle 26 to a workpiece not shown. The swing protection hood 30 includes a cutting edge 2 or a cutter cutting edge 2 for cutting a workpiece (not shown).
The opening 31 of the bottom surface 28, through which the holes 4, 24 'pass, is closed.

FIG. 2 shows a plane board shaft 20 having one groove 32.
The end face of is shown. The groove 32 has a precisely machined groove flank 54 against which the cutter 22 or cutter holder 58 (FIG. 5), not shown here, abuts.
The circular contour of the plane board shaft 20 transitions via the inclined surface 52 to the roughened groove flank 54 behind the groove 32.

FIG. 3 is a plan view of the groove 32 of the plane board shaft 20. Disposed along the groove 32 are conical recesses 34, 36, 38, each of which has a circular flat 4
It ends with 0, 42, 44, and 1 at the center
Two screw holes 46, 48, 50 are concentrically provided. In this case, as is apparent from the figure, the sloping surfaces 52 and the corner edges of the groove flanks 54 are interrupted by the conical recesses 34, 36, 38 and the flats 40, 42, 44 and the screw holes 46, 48, 50. .

FIG. 4 shows the conical recess 3 of the groove 32 of the plane shaft 20.
FIG. 4 is a cross-sectional view taken along line XX of FIG. In this case, the contours of the flat portion 42, the screw hole 46 and the inclined surface 52 or the groove flanks 54 and 56 are clearly shown. As can be further seen in FIG. 4, the conical recesses 34, 36, 38 cut the ramp 52 and groove flank 54 of FIG.
This results in conical recesses 34, 36, 38 and groove flanks 5.
A notch is formed between the conical recess 3 and the notch 4.
Conical tightening body 64 that fits inside 4, 36, 38
Are forced into the groove 32 with their conical peripheral surface 74 (FIGS. 5 and 6).

FIG. 5 is a plane board shaft 2 assembled according to FIG.
0, in which case the plane cutter 22 defines the cutting edge circle 26 in the groove 32 and is clamped between the strip-shaped cutter holder 58 and the support strip 62. Cutter holder 5
8 is supported in surface contact with the groove flank 56 on the front side. The support strip 62 is supported in the groove 32 on the front side by the plane cutter 22 and on the rear side in the form of a truncated cone 64.
The minimum diameter of the clamp body is somewhat smaller than the minimum diameter of the flats 40, 42, 44. The tightening body 64 is fixed in the conical recess 36 by means of a tightening screw 66 in a screw hole 48 having a screw head 68 and a screw shank 70. The more the tightening screw 66 is tightened, the more the tightening body 64 is moved in the radial direction with respect to the plane board shaft 20. In this case, the clamping force by the wedge effect of the clamping body 64 on the support strip 62 and thus on the plane cutter 22 is strengthened as the clamping body is adjusted radially inward in the conical recess 36. By adjusting the tightening body 64, a tangential tightening force acts on the plane cutter 22, and as a result, the plane cutter 22 is fixedly fixed to the plane shaft 20.

FIG. 6 shows a screw hole 72 and a conical peripheral surface 74.
Is shown, which is available as a standard part in a standard board cutter.

The tightening body has a height of about 8 mm.
With a relatively large diameter of approximately 16 mm or approximately 10 mm
Of relatively small diameter is preferred, in which case the cone flank has a cone angle of 20 °.

The screw 164 shown in partial cross-section in FIG. 7 has a threaded shank 170 which is stepped from a conical head 176 by a reduced diameter portion 175. The conical head 176 has a spherical conical peripheral surface 178. When the screw 164 is screwed between the tightening body 64 and the groove flank 56, only line or point contact is made between the mutually supporting parts. This gives rise to certain tightening conditions which allow some manufacturing and assembly errors, and for example the tightening of dust particles or chips between the conical head 176 and the clamping strip 62 or groove flank 56. To some extent also allow. Screw 16
The four conical head 176 has a polygonal edge recess 180 for hanging a screwdriver.

[Brief description of the drawings]

1 is a side view of a handheld plane according to the present invention.

FIG. 2 is a side view of a plane board shaft according to the present invention.

FIG. 3 is a plan view of the plane board shaft of FIG.

FIG. 4 is a sectional view of the plane board shaft of FIG.

FIG. 5 is a sectional view of an embodiment of a plane board according to the present invention.

FIG. 6 is a sectional view of the tightened body.

FIG. 7 shows a tightening body configured as a screw with a conical head

[Explanation of symbols]

 10 Handheld plane 12 Planer casing 14 Motor casing 16 Handle 18 Operation key 20 Planer shaft 22 Cutter 23 Axis 24 Cutting edge 26 Cutting edge circle 28 Bottom 30 Swing protection hood 31 Opening 32 Groove 34 Conical recess 36 Conical Recess 38 Conical recess 40 Flat part 42 Flat part 46 Screw hole 48 Screw hole 50 Screw hole 52 Sloping surface 54 Groove flank 56 Groove flank 58 Cutter holder 62 Support strip 64 Tightening body 66 Tightening screw 68 Screw head 70 Screw shaft part 72 screw through hole 74 conical peripheral surface 74 conical peripheral surface 164 screw 170 screw shaft portion 175 reduced diameter portion 176 conical head 178 conical peripheral surface 180 polygonal edge recess

Claims (12)

[Claims] 1. A handheld plane, having a plane shaft (20) driven by a motor, the plane shaft supporting a plane cutter (22) in a groove (32), The cutter has a groove flank (5
6), the tightening body (64) is formed in a rotationally symmetrical manner, in particular as a conical body, and the recesses (34, 36,
38), in particular in a conical recess (34, 36, 38), characterized in that it is guided for adjustable movement in the radial direction with respect to the plane axis (20). 2. The clamping body (64) is an outer surface, in particular a conical peripheral surface (74), a part of which is a conical recess (34, 36, 3).
8), part of which is supported by the plane board shaft (20), and the plane board (2) is moved by adjusting movement of the tightening body (64) in the radial direction.
0) A hand-held plane with a variable tightening force. 3. Handheld plane as claimed in claim 1 or 2, characterized in that the tightening body (64) is adjustable and movable with respect to the plane board shaft (20) by means of screw mechanisms (66, 48). . 4. A conical recess (34, 36, 38) and
Screw holes (46,48,5) for receiving the tightening screws (66)
The axis 0) is offset parallel to the radius emanating from the center of the plane axis (20).
Handheld plane board according to any one of items 1 to 3. 5. A plurality of fastening bodies, preferably three fastening bodies (6)
Handheld plane according to any one of claims 1 to 4, characterized in that 4) is arranged parallel to the plane axis (20). 6. The fastening strip (64) is a support strip (62).
The plane cutter (2
The handheld plane as claimed in claim 5, which is supported by 2). 7. The plane shaft (20) has a conical recess (34, 3).
6, 38), the recess transitions into a concentric threaded hole (48) and the groove (32) is machined to form a window-like opening to the groove. The peripheral surface (74) of the tightening body (64) is inserted into the opening and is supported by the plane cutter (22) in a wedge shape.
Handheld plane board according to any one of 1 to 6. 8. The clamping body (64) is made rotationally symmetrical, in particular as a cone, and in the radial bore of the plane shaft (20), in particular in the conical recess (34, 36, 38). The hand-held plane board according to any one of claims 1 to 7, which is adjustable and movable. 9. The conical recess (34, 36, 38) in which the clamping body (64) is made rotationally symmetrical, in particular in the shape of a truncated cone, and radially with respect to the plane board axis (20). 9. A handheld plane as claimed in claim 8, characterized in that it is guided in an adjustable manner inside. 10. The conical tightening body (64) has a large diameter part diameter of about 16 mm, a small diameter part diameter of about 10 mm, a height of about 8 mm, and a conical peripheral surface (74) having a cone angle of about 20.
10. The handheld plane as claimed in claim 9, wherein the angle is 0 °. 11. The tightening body comprises a screw shaft portion (170),
It is made as a screw (164) with a conical head (176), in particular a frusto-conical head, and a spherical conical peripheral surface (178), which spherical conical peripheral surface comprises a groove flank and a plane cutter (22). 10. The handheld plane according to claim 9, which can be supported in line contact or point contact with and. 12. The conical head (17) of the screw (164).
12. The method according to claim 11, wherein 6) has a polygonal edge recess (180) for hanging a screwdriver.
Handheld plane board described.