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WO1992015419A1 - Mecanisme de reglage de la profondeur de coupe d'une detoureuse - Google Patents

Mecanisme de reglage de la profondeur de coupe d'une detoureuse Download PDF

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Publication number
WO1992015419A1
WO1992015419A1 PCT/US1991/008195 US9108195W WO9215419A1 WO 1992015419 A1 WO1992015419 A1 WO 1992015419A1 US 9108195 W US9108195 W US 9108195W WO 9215419 A1 WO9215419 A1 WO 9215419A1
Authority
WO
WIPO (PCT)
Prior art keywords
adjustment
ring
base
projection
motor housing
Prior art date
Application number
PCT/US1991/008195
Other languages
English (en)
Inventor
David E. Beth
Robert E. Mccracken
James B. Watson
Original Assignee
Ryobi Motor Products Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/661,619 external-priority patent/US5074724A/en
Priority claimed from US07/661,823 external-priority patent/US5078557A/en
Priority claimed from US07/661,618 external-priority patent/US5088865A/en
Application filed by Ryobi Motor Products Corp. filed Critical Ryobi Motor Products Corp.
Priority to JP4500926A priority Critical patent/JPH06507849A/ja
Priority to EP91920160A priority patent/EP0673294A1/fr
Publication of WO1992015419A1 publication Critical patent/WO1992015419A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C5/00—Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor
    • B27C5/10—Portable hand-operated wood-milling machines; Routers

Definitions

  • This invention relates to portable electric router tools and, more particularly, to an arrangement for providing an adjustable depth of cut adjustment mechanism.
  • Prior art routers have been constructed with various kinds of depth of cut adjustment mechanisms.
  • One such type of mechanism utilizes a rack and pinion arrangement whereas another type utilizes an externally threaded motor housing. All of the known mechanisms suffer from various drawbacks, including relatively large numbers of parts, difficulty of assembly, and inconvenience in use.
  • Prior router depth of cut adjustment mecha ⁇ nisms utilizing a split adjustment ring have included projections on opposite sides of the split which are squeezed together to effect a clamping action by means of a threaded member arranged generally tangential to the ring. These arrangements are not entirely satisfac ⁇ tory because, for example, there is insufficient room for manipulating the threaded member.
  • the router When using a router, the operator often desires to quickly change the depth of cut from one preset depth to another present depth.
  • the router includes a motor housing with an external cylindrical portion and a base with a cylindri ⁇ cal bore for slidably receiving therein the cylindrical portion of the motor housing.
  • a depth of cut adjustment ring engages the motor housing and the base and is rotatable to effect relative longitudinal displacement of the motor housing with respect to the base, the router further including an arrangement for preventing relative rotation between the motor housing and the base.
  • a depth of cut adjustment mecha- nism for a router
  • the router motor housing has an external cylindrical portion with a first longitudi ⁇ nal region having a substantially smooth surface and a second longitudinal region having an external screw thread.
  • a cutting tool is mounted to the shaft of the motor contained within the motor housing and extends beyond one end of the motor housing.
  • the router also includes a base having a cylindrical bore for slidably receiving therein the smooth surface longitudinal region of the motor housing.
  • the depth of cut adjustment mechanism includes an adjustment ring which engages the screw thread on the motor housing and rotationally engages the base, and further includes an arrangement for preventing relative rotation between the motor housing and the base. By means of this arrangement, rotation of the adjustment ring effects relative longi- tudinal motion between the motor housing and the base, so that the distance which the cutting tool projects beyond the base may be varied to thereby adjust the cutting depth.
  • the arrangement for preventing relative rotation includes a keyway and slot combination formed in the motor housing and the base.
  • a pair of stop rings each having an interference projection, and each being independently rotatably mounted on the router base. These rings may be set with their interference projec ⁇ tions at any desired angular orientation on the base.
  • the depth of cut adjusting ring has a tab fixedly mounted thereon which extends to a point between the interfering projections so as to limit the angular rotation of the adjustment ring.
  • a clamping arrangement for use in the environment described above which in- eludes first and second projections formed on the split ring adjacent opposite sides of the split.
  • Each of the projections has a frusto-conical camming surface.
  • a circular knob mounted for threaded rotation on a bolt passing through the projections radially with respect to the router motor housing bears against the camming surfaces so as to squeeze the ring to effect a clamping action as the knob is moved inwardly.
  • the surfaces of the first and second projections are shaped such that at a section taken along a plane orthogonal to the bolt each of the surfaces describes an arc of a circle having a predetermined diameter irre ⁇ spective of the position of the plane along the surfac ⁇ es, the center of the circle varying linearly as the plane moves along the bolt.
  • the clamp knob inner surface is frusto- conical to provide substantial surface engagement with the first and second projection surfaces.
  • FIGURE 1 is an elevational view, partially cut away, showing a router constructed in accordance with this invention
  • FIGURE 2 is a perspective view of the motor housing of the router shown in Figure 1;
  • FIGURE 3 is a perspective view of the top central portion of the base of the router shown in Figure 1;
  • FIGURE 4 is a top plan view of the adjustment ring of the router shown in Figure 1, shown in its * fully open state;
  • FIGURE 5 is an elevational view of the opened adjustment ring shown in Figure 4.
  • FIGURE 6 is a cross-section of the adjustment ring taken along the line 6-6 in Figure 5;
  • FIGURE 7 is a cross-sectional view showing details of the clamping knob on the adjustment ring
  • FIGURE 7A is a detail of the surface of the adjustment ring clamp projection
  • FIGURE 8 is a top plan view of a stop ring of the router shown in Figure 1, shown in its fully open state;
  • FIGURE 9 is an elevational view of the opened stop ring shown in Figure 8;
  • FIGURE 10 is an enlarged detail of the stop ring shown in Figure 9.
  • FIGURE 11 is an elevational view, partly in cross-section, showing how the motor housing, the base, the adjustment ring and the stop rings of the router shown in Figure 1 fit together.
  • FIG. 1 illustrates a router, designated generally by the reference numeral 100, which is constructed in accor ⁇ dance with the principles of this invention.
  • the router includes a motor housing 102 which contains a motor (not shown) powered through a switch 105 and a line cord 104 and having a rotating output shaft on which is mounted a collet 106 for holding a cutting tool (not shown) .
  • the motor, its mounting within the motor housing 102, and the cutting tool collet form no part of the present invention and will not be described in any further detail.
  • the motor housing 102 is supported in a base 108, in a manner to be described in full detail herein ⁇ after, which includes a pair of handles 110 by means of which an operator can manipulate the router 100 along a work surface.
  • the motor housing 102 is supported in the base 108 so that the cutting tool can extend outwardly beyond the lower support surface 112 of the base 108.
  • the lower support surface 112 rests on the upper surface of the work and the distance that the cutting tool extends beyond the lower support surface 112 determines the depth of cut of the router 100. This depth of cut may be adjusted by varying the relative longitudinal position of the motor housing 102 relative the base 108.
  • the motor housing 102 is generally cylindrical in external config ⁇ uration.
  • a first longitudinal region 114 of the motor housing 102 has a generally smooth surface, while a second longitudinal region 116 is formed with an exter- nal screw thread 118.
  • the base 108 has a cylindrical bore 120 which is sized to slidably receive therein the smooth longitudinal region 114 of the motor housing 102.
  • the cylindrical bore 120 of the base 108 is formed with a longitudinal groove 122 and the motor housing 102 is formed with a projection 124 complemental thereto.
  • the present invention is concerned with the arrangement for adjusting the depth of cut of the router 100. Accordingly, there is provided an adjustment ring 126 which engages both the screw thread 118 on the motor housing 102 and also rotationally engages the base 108. Since the motor housing 102 cannot partake of rotational motion relative the base 108 because of the groove 122 and the projection 124, rotation of the adjustment ring 126 effects longitudinal displacement of the motor housing 102 relative the base 108, which varies the distance that the cutting tool projects beyond the lower support surface 112. Subsequent clamping of the adjust ⁇ ment ring 126 to the motor housing 102 and the base 108 maintains the desired depth of cut adjustment.
  • the adjustment ring 126 is formed with an internal screw thread 128 ( Figure 5) which is comple- mental to the external screw thread 118 of the motor housing 102.
  • the base 108 is formed with an annular groove 130 at its upper end and the adjustment ring is formed with an inwardly directed projection, or flange, 132 which engages the annular groove 130. Accordingly, rotation of the adjustment ring 126 does not affect its longitudinal position with respect to the base 108 but due to the pitch of the screw threads 118,128, the motor housing 102 is longitudinally displaced.
  • the adjustment ring 126 is a split ring hinged at 134, as best shown in Figures 4 and 5. Each half of the adjustment ring 126 is generally se i- circular in plan. This allows for economical molding of the adjustment ring 126 and easy assembly onto the router 100.
  • the adjustment ring 126 is preferably molded of a plastic material so that it is inherently resilient.
  • the adjustment ring 126 After the adjustment ring 126 is rotated to achieve a desired depth cut, the ring 126 must be clamped to the motor housing 102 and the base 108 to maintain that depth of cut setting.
  • the adjustment ring 126 is formed with a first projec- tion 136 adjacent a first of the opposed ends flanking the split of the ring 126 and a second projection 138 adjacent the other opposed end flanking the split of the ring 126.
  • the projections 136,138 are mirror image halves of a frusto-conical structure. When pressed together, the projections 136,138 provide a recess 140 which holds the head 142 of a threaded member 144 against rotation.
  • a circular clamp knob 146 is provided.
  • the knob 146 has an internally threaded boss 148 which is threadedly engaged with the threaded member 144, as is best shown in Figure 7.
  • the clamp knob 146 has an inner camming surface 150 which bears against the frusto-conical surfaces 152,154 of the projections 136,138, respectively.
  • clockwise rotation of the clamp knob 146 closer to the motor housing 102 to draw the projections 136,138 toward each other, thereby closing the gap between the opposed ends of the adjust ⁇ ment ring 126 and clamping the adjustment ring 126 to the motor housing 102 and the base 108.
  • counterclockwise rotation of the clamp knob 146 loosens the adjustment ring 126. Since the clamp knob 146 extends away from the router 100 to a region which is free of all obstructions, it is very easily manipulated by the operator.
  • the clamp knob 146 is circular, with the inner camming surface 150 being beveled so that it is frusto- conical.
  • the surfaces 152,154 are shaped such that at a section taken along a plane orthogonal to the threaded member 144, each of the surfaces 152,154 describes an arc of a circle having a predetermined fixed diameter irrespec ⁇ tive of the position of the plane along the surfaces 152,154. The center of that circle varies linearly as the plane moves along the threaded member 144.
  • the router 100 is arranged with adjustable limit stops for the depth of cut adjust ⁇ ment mechanism so that the operator can quickly change the depth of cut setting between first and second preset depths of cut.
  • These limit stops are provided on stop rings which encircle the base 108 and which may be fixed to the base 108 in preset angular orientations.
  • the limit stops cooperate with structure on the adjustment ring 126 to provide limits to the range of angular rotation of the adjustment ring 126.
  • FIGs 8-10 illustrate a stop ring 156 which may be utilized for the above-described function.
  • a pair of such stop rings 156 are utilized, the stop rings being rotated 180 * from each other when in use, as will be described in full detail hereinafter.
  • the stop ring 156 is a split ring hinged at 158.
  • Each half of the stop ring 156 is generally semi-circular in plan ( Figure 8) while being generally triangular in cross-section as can best be seen in Figure 11.
  • the inner surface of the stop ring 156 is at an angle of approximately 45 * .
  • This inner surface is serrated to form a plurality of grooves 160.
  • the wider end surface 162 of the stop ring 156 is also serrated.
  • the stop ring 156 is preferably molded of a plastic material so that it is inherently resilient.
  • the stop ring 156 is formed with an interfering projec ⁇ tion 164 at one end and an adjustment projection 166 at its other end.
  • the projections 164,166 are thus opposed across the opening of the split stop ring 156, and the spacing therebetween determines the overall circumfer ⁇ ence of the stop ring 156.
  • the adjustment projection 166 is formed with an opening 168 which is directed circumferentially of the stop ring 156.
  • On the interfering projection 164 there is formed a tab 170 circumferentially directed toward the adjustment projection 166.
  • the tab 170 includes a first barb 172 and a second barb 174 and is adapted for. insertion through the opening 168.
  • the lower end of the adjustment ring 126 is formed with a beveled annular surface 176, as best shown in Figure 11.
  • the base 108 is formed with a beveled annular surface 178 adjacent the annular groove 130, so that when the adjustment ring 126 is installed on the base 108 the surfaces 176 and 178 together form a V-shaped annular groove.
  • the pair of stop rings 156 fit within this groove, with one of the stop rings oriented 180° with respect to the other stop ring, as is best shown in Figure 11.
  • the beveled annular surface 178 is formed with a number of ribs 180 which are directed transversely to the direction of rotation of the stop rings 156 in the V-shaped annular groove.
  • the ribs 180 cooperate with the serration grooves 160 of the lower one of the stop rings 156 when the second barb 174 engages the adjustment projection 166 so that the stop ring 156 is at its smaller circum ⁇ ference. In this state, the lower stop ring 156 is effectively clamped and prevented from rotating.
  • the adjustment ring 126 is formed with a ta 182 which extends toward, but terminates before, the beveled annular surface 176, as is best shown in Figure 1.
  • the projections 164,166 of the stop rings 156 extend beyond the V-shaped annular groove and therefore extend into the path of travel of the tab 182.
  • the range of angular rotation of the adjustment ring 126 is limited by the angular positions of the stop rings 156.
  • the stop rings 156 are set with their first barbs 172 engaging the adjustment projections 166 so that the circumferences of the stop rings 156 are relatively large and the stop rings 156 are free to rotate independently in the V-shaped annular groove.
  • the operator then sets the greater of the two preset depths of cut.
  • the lower stop ring 156 is then moved so that its interfering projection 164 abuts the tab 182.
  • the adjustment tab 170 is then manipulated so that the second barb 174 engages the adjustment projection 166 of the lower stop ring 156. This causes the lower stop ring 156 to be clamped to the base 108 by means of the ribs 180 and the serration grooves 160.
  • the adjustment ring 126 is moved to set the shallower depth of cut.
  • the upper stop ring 156 is then moved so that its interfering projection 164 abuts the tab 182.
  • Its adjustment tab 170 is then manipulated so that the second barb 174 engages the adjustment projection 166.
  • This clamps the upper stop ring 156 to the lower stop ring 156 by means of the serrations on the end surfaces 162.
  • the operator can quickly change the depth of cut between the preset deeper and shallower depths of cut, as defined by the positions of the two stop rings 156, by rotating the adjustment ring 126 until the tab 182 abuts against the respective interfer ⁇ ing projection 164.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)

Abstract

Détoureuse électrique portable dotée d'un mécanisme de réglage de la profondeur de coupe, comprenant une bague de réglage (126) qui s'engrène dans un filetage de vis (118) situé sur le boîtier du moteur (102) et s'engrène de manière rotative sur la base de la détoureuse (108). Ladite détoureuse comprend en outre un mécanisme destiné à empêcher la rotation relative entre le boîtier du moteur et la base. La bague de réglage (126) est façonnée en forme de bague fendue dotée de parties saillantes (136, 138) adjacentes aux deux côtés opposés de la fente, chacune ayant une surface tronconique (152, 154). Un bouton de serrage circulaire (146) monté de manière à effectuer un mouvement de rotation sur le filetage d'un boulon (144) passant à travers les parties saillantes (136, 138) radialement par rapport au boîtier (102) du moteur de la détoureuse appuie sur les surfaces tronconiques (152, 154) de manière à resserrer la bague (126) afin d'entraîner un effet de serrage lorsque le bouton (146) est tourné vers l'intérieur. Une paire de bagues d'arrêt (156) à rotation angulaire sur la base de la détoureuse (108) sont destinées à fournir des arrêts pour la profondeur de coupe donnée. Chacune des bagues d'arrêt (156) comprend une partie saillante d'interférence (164, 166) et la bague de réglage (126) possède une table, montée à demeure sur ladite bague, qui s'étend jusqu'à un point situé entre les parties saillantes d'interférence (164, 166). Les bagues d'arrêt (156) peuvent être fixées sur la base de la détoureuse (108) afin de limiter l'amplitude de rotation angulaire de la bague de réglage (126).
PCT/US1991/008195 1991-02-28 1991-11-04 Mecanisme de reglage de la profondeur de coupe d'une detoureuse WO1992015419A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4500926A JPH06507849A (ja) 1991-02-28 1991-11-04 削り深さ調整機構付きルーター
EP91920160A EP0673294A1 (fr) 1991-02-28 1991-11-04 Mecanisme de reglage de la profondeur de coupe d'une detoureuse

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US661,618 1991-02-28
US07/661,619 US5074724A (en) 1991-02-28 1991-02-28 Split ring clamping arrangement
US07/661,823 US5078557A (en) 1991-02-28 1991-02-28 Limit stops for a router depth of cut adjustment mechanism
US661,619 1991-02-28
US661,823 1991-02-28
US07/661,618 US5088865A (en) 1991-02-28 1991-02-28 Depth of cut adjustment mechansm for a router

Publications (1)

Publication Number Publication Date
WO1992015419A1 true WO1992015419A1 (fr) 1992-09-17

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ID=27418049

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/008195 WO1992015419A1 (fr) 1991-02-28 1991-11-04 Mecanisme de reglage de la profondeur de coupe d'une detoureuse

Country Status (4)

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EP (1) EP0673294A1 (fr)
JP (1) JPH06507849A (fr)
AU (1) AU8928191A (fr)
WO (1) WO1992015419A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20203390U1 (de) * 2002-03-02 2003-07-17 Trumpf Grüsch AG, Grüsch Handfräsmaschine
CN111331691A (zh) * 2020-04-08 2020-06-26 吴中华 一种旋转切削自动进给装置及拥有该装置的锄头把加工机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899883A (en) * 1930-06-25 1933-02-28 Elmer P Sacrey Adjustable and interchangeable mounting for motor driven tools
US2842173A (en) * 1956-06-27 1958-07-08 Singer Mfg Co Routers with detachable motors and switch handles
US3363510A (en) * 1966-04-25 1968-01-16 Stanley Works Router
US4108225A (en) * 1976-10-29 1978-08-22 The Singer Company Depth-of-cut mechanism for routers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899883A (en) * 1930-06-25 1933-02-28 Elmer P Sacrey Adjustable and interchangeable mounting for motor driven tools
US2842173A (en) * 1956-06-27 1958-07-08 Singer Mfg Co Routers with detachable motors and switch handles
US3363510A (en) * 1966-04-25 1968-01-16 Stanley Works Router
US4108225A (en) * 1976-10-29 1978-08-22 The Singer Company Depth-of-cut mechanism for routers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0673294A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20203390U1 (de) * 2002-03-02 2003-07-17 Trumpf Grüsch AG, Grüsch Handfräsmaschine
US6733216B2 (en) 2002-03-02 2004-05-11 Trumpf Grusch Ag Hand-held milling machine
CN111331691A (zh) * 2020-04-08 2020-06-26 吴中华 一种旋转切削自动进给装置及拥有该装置的锄头把加工机

Also Published As

Publication number Publication date
EP0673294A4 (fr) 1994-06-13
JPH06507849A (ja) 1994-09-08
AU8928191A (en) 1992-10-06
EP0673294A1 (fr) 1995-09-27

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