JP2000052311A - Planing head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a cutter replaceable easily and improve the tolerance sensitivity in a cutter chucking area by setting the position of a centrifugal wedge to be adjustable for changing the preload of the centrifugal wedge or disengaging the planing cutter with the help of a setscrew which can be helically thrust into the radial direction of a base. SOLUTION: All centrifugal wedge molding parts 161 on a molded thin layer plate 18 are fixedly joined with each other through an antideviation protrusion 23. Therefore, when a lever arm 25 moves inward in the radial direction of a lever arm 25, the preloading force of a centrifugal wedge 16 to a planing cutter 14 decreases and the planing cutter 14 is, for example, disengaged for cutter replacement. When the lever arm 25 moves outward in the radial direction of the lever arm 25, the preloading force of the centrifugal wedge 16 to the planing cutter 14 increases. Consequently the planing cutter 14 is disengaged. Since the centrifugal wedge 16 can be positioned very accurately with the help of two setscrews 29, the cutter fastening range is substantially not influenced by the tolerance when the centrifugal wedge molding part 161 is punched out in the molded thin layer plate 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The invention relates to a planing tool which, in accordance with the preamble of claim 1, receives in each of at least one longitudinal groove a planing knife which extends radially beyond the basic body contour. A cylindrical substrate, and at least one preloadable chuck movably held by the substrate and received within the substrate recess and clamping the planing blade to the substrate by centrifugal force; A planing head for a hand-held planing machine of the type comprising a wedge or a centrifugal wedge.

[0002]

2. Description of the Related Art German Patent Application DE 195 36 559 A1, which is mounted in a housing of a hand-held planing machine in a non-rotatable manner and is driven by an electric motor, is known from DE 195 36 559 A1. In planing heads (also known as blade supports or planing shafts), the integrated wedges can only be undone, ie, cannot be removed without breaking, by means of a spring. In the recessed portion formed in the body, the base is elastically positioned on the base, and in the rotation stop state of the planing head,
A tightening force is applied to the planing blade located in the longitudinal groove to prevent the planing blade from sliding down. During rotation of the planing head, the centrifugal wedge is squeezed outward, which increases the pressure of the centrifugal wedge against the planing blade. In that case, cooperating with the projection provided on the base,
A grip groove formed in the centrifugal wedge limits the inward and outward radial stroke of the centrifugal wedge. The substrate is formed from a consistent packet of substantially identical molded disks or molded laminations, the molded disks or molded laminations being non-twistably secured to a planing head shaft. ,
In the axial direction, they are tightened to each other by a tightening body supported on the planing head shaft. Since each molded disk is formed with one centrifugal wedge molded body and one leaf spring molded body, a centrifugal wedge provided with a leaf spring for elastically positioning the centrifugal wedge on the substrate by layered plate packetization. Also occurs.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to simplify blade replacement and to improve tolerance in the blade chuck area.

[0004]

According to another aspect of the present invention, the centrifugal wedge is positioned by at least one set screw that can be radially screwed into the base. Is adjustable in order to change the preload or to release the planing blade.

[0005]

Advantages of the planing head according to the present invention by means of the present invention are as follows. The variability of the preload force facilitates blade replacement and improves the tolerance sensitivity in the blade chuck area. That is. This is because the centrifugal wedge or chuck wedge can be positioned by at least one set screw. A smaller fold depth is required for blade replacement than in the prior art.
The planing knife is supported against the impact action (by a branch or a nail) by at least one set screw. The risk of wood driving is reduced by screw loading.

[0006] Advantageous configurations and improvements of the planing head according to claim 1 are possible by means as defined in claim 2 and after.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described in detail with reference to the drawings.

The planing head shown in perspective in FIG. 1 comprises a cylindrical body 11 having a substantially circular outer contour, in which a recess called a chuck groove 12 and A longitudinal groove 13 for receiving a planing blade 14 is formed. A planing blade 14 slightly extending in the radial direction beyond the outer contour of the base 11 is provided with a base recess 15.
The centrifugal wedge 16 (FIG. 2) is preloaded in the longitudinal groove 13, for which the centrifugal wedge 16 is integrally connected to the base body 11 via a spring 17. The base 11 is fixed to the shaft 10 so as to be relatively non-rotatable, and the shaft has both ends protruding from both end surfaces of the base 11,
It is rotatably supported in a casing of a hand-held planing machine via a rotary bearing. One end of the shaft 10 is connected to an electric motor via a transmission. During rotation of the planing head, the centrifugal wedge 16 is squeezed outward, thereby increasing the pressure of the centrifugal wedge against the planing blade 14.

As partly shown in FIG. 1 and as can be seen in FIG. 4, the substrate 11 is formed from a consistent laminar packet consisting of a number of molded laminations 18 which are in contact with one another in the axial direction. A total of five embodiments of the molded laminar plate 18 are shown in detail in FIGS. Formed thin plate 1
8 is punched out, subjected to rust-preventive galvanizing or gas nitration, and bulging out a non-slip projection;
Because they are packetized, they are fixed so that they cannot rotate relative to each other. The entire laminated plate packet forming the base body 11 is mounted on the shaft 10 so as not to rotate relatively. All molded laminations 18 are formed at both outer ends of the laminated packet.
(Refer to FIG. 9 and hereinafter, this is referred to as an end-face-coated thin plate 181)
Except for the above, there are two substantially opposing cavities 20, 21 for weight reduction, a plurality of non-slip projections 19 stamped out for mutual positioning, and one notch 151. The whole notch 151 aligned with each other in the molded thin plate 18 forms the above-described base recess 15 in the base 11. The centrifugal wedges 16 located in the base recess 15 are all
1, the whole of the formed thin plate 18 (FIGS. 5 to 7) is formed, and the centrifugal wedge forming portion 161 is located together with the spring forming portion 171 in the cutout portion 151 in the formed thin plate 18. It is stamped and formed. All of the centrifugal wedge forming parts 161 are fixedly connected to each other via the stopper projections 23 pressed into the centrifugal wedge forming part 161. The centrifugal wedge forming portion 161 forms the left groove flank 131 of the vertical groove 13 by the entire vertical edge formed thereon, while the right groove flank 132 is formed in each formed thin plate 18. Formed by a number of vertical edges each punched. The molded laminations 18 shown in FIGS. 7, 6 and 5 are all constructed as described above, but are still additionally deformed between one another. Therefore, the formed thin plate 18 shown in FIG. 5 is hereinafter referred to as a lever thin plate 185, and the formed thin plate 18 shown in FIG. 7 is hereinafter referred to as a wedge thin plate 183. The layer plate 185 and the thin wedge layer plate 183 each have one bag notch 24 that continues from the notch 151. In the case of the lever thin plate 185 shown in FIG. 5, a lever arm 25 is integrally formed with the centrifugal wedge forming portion 161, and the lever arm enters the bag notch 24. In the case of the thin wedge layer plate 183 shown in FIG. 7, the lever arm as described above is not provided in the centrifugal wedge forming portion 161. The molded thin plate 18 shown in FIG. 6 is hereinafter referred to as a separate thin plate 184, but has a cut-out portion 26 which is completely closed in place of the bag cutout portion. The parts are arranged so as to match the bag cutouts 24 formed in the lever thin plate 185 and the wedge thin plate 183 when the molded thin plate 18 is packetized. The two end face covering thin plates 181 shown in FIG. 9 also have the same see-through portions 26. The molded thin plate 18 schematically shown in FIG. 8 (hereinafter referred to as a locking thin plate 182) also has a bag notch 24 connected to the notch 151, but FIG.
Is different from the wedge thin plate 183 shown in FIG.
1 has been modified to have no centrifugal wedge molding at its free end, but rather a locking molding 27. The locking molded portion 27 is engaged with the peripheral surface of the projection 38 formed on the locking thin plate 182 by a gripping groove 271 and has a linear side surface extending outward in the radial direction. Are formed, and the chuck groove 12 is radially outwardly connected to the left groove flank. The right-hand groove flank 13 of the vertical groove 13 is also formed by a straight side surface extending radially outward of the locking thin plate 182. The straight side surface of the locking forming portion 27 forming the left-side groove flank 131 is formed so that the longitudinal groove 13 is narrower than in the case of the other formed thin plates 18. Has been chucked,
In addition, when the planing head is stopped, the axial position of the planing head is not changed or lost. To loosen this preload, an auxiliary tool can be introduced into the bag notch 24 and shifted below the locking part 27, whereby the locking part 27 can be pivoted to its loosened position. become. The locking laminations 182 are arranged at one end of the laminated lamination packet, side by side with the end covering laminations 181 shown in FIG. Can be inserted through the cut-out portion 26 formed in the adjacent end face covering thin plate 181.

FIGS. 1 and 4 show a laminated sheet packet of the formed laminated sheet 18. A large number of wedge thin plates 183 are arranged between the outer end face thin plates 181 and the locking thin plates 182 connected to the one end face thin plates 181. Between the two wedge thin plates 183 at a distance a from both end surfaces of the laminated plate packet, a thin plate group composed of a thin plate 184 is disposed, respectively, separated from a lever thin plate 185. Both laminations are equally configured, and each lamination is composed of two outer lever laminations 185 and two spaced laminations interposed between the lever laminations 185. 184. By the way, after being packetized into a laminated plate packet, each of the laminated plate groups including the lever laminated plate 185 and the laminated laminated plate 184 has one female screw hole 28 in the radial direction.
2 (see FIG. 2), the female screw holes are opened in the cut-out portion 26 of the thin plate 184 and the bag notch 24 of both lever thin plates 185, as can be seen from the sectional view of FIG. are doing. A set screw 29 as shown in FIG. 3 is screwed into each female screw hole 28. Set screw 29 is female screw hole 2
8 having a male thread for screwing into the female thread of FIG. 8 and the thread section 2 as viewed in the screwing direction.
There is a set section 292 located in front of 91, the minimum inner normal diameter or thread core diameter of the set section being smaller than the outer diameter of the thread section 291. The set section 292 has a cut 293 extending from the thread section 291 to near the free end of said set section 292, the cut depth of which is determined by the leverage in the centrifugal wedge forming section 161 of the lever laminar plate 185. The thickness is substantially equal to the axial thickness of the arm 25, and in other words, it corresponds to the thickness of the stamped formed thin plate 18. The axial length of the cut portion 293 and the dimension h of the lever arm 25 in the same direction.
5 (see FIG. 5) are coordinated with one another such that the lever arm 25 is located within the cut 293 with axial play.
The free front end of the set section 292 is frusto-conical. A single radial shoulder 293a, 293b is formed at the transition point from the set section 292 to the cut section 293 and at the transition point from the cut section 293 to the thread section 291 respectively. Set section 29 at radial shoulder 293a
2 is designed to be somewhat larger than the inner axial distance between the lever arms 25 of both lever thin plates 185, while the outer diameter of the cut 293 is Is approximately equal to the inner axial distance of. A hexagonal hole 294 for mounting an auxiliary tool is formed on the end face side of the thread section 291 for screwing the set screw 29.

By the way, when the set screw 29 is screwed into the female screw hole 28, the set section 292 enters between the lever arms 25 of the both lever thin plates 195 by the truncated conical head at the front end thereof, and the both lever arms 25 are inserted. Press and release. As the frusto-conical head is shifted along the lever arm 25, the lever arms 25 snap into the cuts 293 so that the lever arms have a radial shoulder 293a in front of the cut 293 and a radial shoulder 293a. A diametrical portion between the posterior radial shoulder 293b will be permanently located within the notch 293. Depending on the direction of rotation of the set screw 29, the two lever arms 25 are
Entrained by 93b or by the radial shoulder 293a, this pushes the lever arm 25 radially inward or radially outward. All the centrifugal wedge forming portions 16 in the formed thin plate 18 are
1 are fixedly connected to each other, so in the first case,
In short, when the lever arm 25 moves inward in the radial direction, the preload force of the centrifugal wedge 16 on the planing blade 14 is reduced, and the planing blade 14 is dissociated, for example, for blade replacement, whereas the second. In other words, when the lever arm 25 is moved outward in the radial direction, the centrifugal wedge 1
The preload force of 6 increases. Thus, the planing blade 14 can be disengaged or tightened with a preload as specified. The presence of the axial play of the lever arm 25 in the cut portion 293 does not hinder the enhancement of the blade chucking action due to the centrifugal force. Two set screws 29
As a result, the centrifugal wedge 16 can be positioned very accurately, so that the blade clamping range is substantially insensitive to tolerances in stamping the centrifugal wedge molding 161 in the molded lamination 18.

[Brief description of the drawings]

FIG. 1 is a perspective view of a planing head for a hand-held planing machine.

FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged side view of a set screw for screwing into the planing head shown in FIG. 1;

FIG. 4 is a longitudinal sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a plan view of one embodiment of a formed thin plate (lever lever thin plate) of the planing head shown in FIG. 1;

FIG. 6 is a plan view of one embodiment of a formed thin plate (separate thin plate) of the planing head shown in FIG. 1;

FIG. 7 is a plan view of one embodiment of a formed thin plate (thin wedge plate) of the planing head shown in FIG. 1;

FIG. 8 is a plan view of one embodiment of a formed thin plate (locking thin plate) of the planing head shown in FIG. 1;

FIG. 9 is a plan view of one embodiment of a formed thin plate (end-face-coated thin plate) of the planing head shown in FIG. 1;

[Explanation of symbols]

10 axis, 11 base, 12 chuck groove, 13
Longitudinal grooves, 14 planing blades, 15 base recesses,
16 centrifugal wedge, 17 spring, 18 molded thin plate,
19 Non-slip projection, 20, 21 gap, 23
Slip stopper, 24 bag notch, 25 lever arm,
26 cut-through part, 27 locking molded part, 28 female screw hole, 29 set screw, 131 left groove flank, 132 right groove flank, 151 notch,
161 centrifugal wedge molding part, 171 spring molding part, 181
End-faced lamination plate, 182 Lock lamination plate, 183 Wedge lamination plate, 184 Separation lamination plate, 185 Lever lever lamination plate, 271 Grip groove, 291 Thread section, 292
Set section, 293 notch, 293a, 29
3b radial shoulder, 294 hex

Claims (9)

[Claims] 1. A cylindrical substrate (11) for receiving in each of said at least one longitudinal groove (13) a planing knife (14) projecting radially beyond the substrate contour, said substrate (11). At least one preload that is movably held and received within the base recess (15) and tightens the planing blade (14) to the base (11) by centrifugal force. Two chuck wedges or centrifugal wedges (16)
In a planing head for a hand-held planing machine of the type comprising at least one set screw (2) which can be screwed radially into the base body (11).
9) A planing head for a hand-held planing machine, characterized in that the planing head can be adjusted to change the preload of the centrifugal wedge (16) or to release the planing blade (14). . 2. A centrifugal wedge (16) is permanently connected to a base (11) via a spring (17), and said base (11) is formed by a base recess (15) and a centrifugal wedge (15). 16) and springs (17) are assembled from a number of shaped laminations (18) which are in contact with each other in the axial direction, one centrifugal wedge and one spring molding (161, 16) in each molded lamination. 1
71) as well as a cut-out (151) and a centrifugal wedge forming part (161) of at least two forming laminar plates (18) located in the region of at least one set screw (29). Each have one lever arm (25) projecting from the centrifugal wedge molding (161) and engaging with the set screw (29), the lever arm being a molded laminar plate (18).
2. The planing head according to claim 1, which penetrates into a continuous bag notch (24) from a notch (151) therein. 3. A lever plate (1) having a lever arm (25).
85), there is at least one, preferably a number of formed laminations (18), called laminations (184), arranged between said two laminations. Each of the plates (184) has a fully closed see-through (26) that is congruent with a bag notch (24) formed in the lever lamella (185), and A set screw in a group of formed laminations comprising a separation lamination (184) each having one cut-out (26) and said lever laminations (185) in contact with said separation laminations. One female screw hole (28) for (29) is formed in the cutout (24) of the lever thin plate (185) and the cut-out portion (2) of the separating thin plate (184).
3. A planing head according to claim 2, which is radially threaded so as to open into 6). 4. The laminar plates (18) abutting one another are packetized and welded by non-slip projections (23) and at least one female screw is formed in the finally produced laminated plate packet. 4. The planing head according to claim 3, wherein the holes (28) are threaded. 5. A set screw (29) having a set section (292) located in front of a thread section (291) when viewed in the screwing direction, wherein the outer diameter of the set section is equal to the thread section (29). A cut portion (293) is formed in the set section (292) smaller than the core diameter of the cut section (291), and the cut section has a reduced diameter compared to the set section (292). Outside diameter of two lever thin plates (185)
5. A planing head according to claim 2, wherein the distance between the lever arms (25) is equal to the inner axial direction. 6. The planing head according to claim 5, wherein the cutting depth of the cut-out (293) is designed to be approximately equal to the lamination width of the lever lamination (185). 7. The axial length of the cut portion (293) in the set section (292) and the dimension (h) of the lever arm (25) in the same direction are such that the lever arm (25) is cut with axial play. A planing head according to claim 5 or 6, wherein the planing heads are coordinated with one another so as to be located within (293). 8. The front free end of the set section (292) is chamfered in a frusto-conical shape.
A planing head according to any one of the preceding claims. 9. At least one set screw (29)
Are completely screwed into the base (11) and have a hexagonal hole (294) for mounting an auxiliary tool,
A planing head according to any one of claims 1 to 8.