Source: https://patents.google.com/patent/US7063201?oq=Frischling
Timestamp: 2018-03-25 04:15:53
Document Index: 356102571

Matched Legal Cases: ['art 135', 'art 135', 'art 32', 'art 31', 'art 335', 'art 31']

US7063201B2 - Power tool and spindle lock system - Google Patents
US7063201B2
US7063201B2 US10796355 US79635504A US7063201B2 US 7063201 B2 US7063201 B2 US 7063201B2 US 10796355 US10796355 US 10796355 US 79635504 A US79635504 A US 79635504A US 7063201 B2 US7063201 B2 US 7063201B2
US10796355
US20040231952A1 (en )
Another independent problem with existing power tools is that, when the motor is switched from the operating condition to the non-operating condition, a braking force may be applied to the motor while the spindle (under the force of the inertia of the spindle (and tool holder and/or supported tool element) continues to rotate through the free angle. The braking of the motor. (coupled with the continued rotation of the spindle) causes the automatic spindle lock to engage resulting in noise (a big “clunk” and/or “chattering”) and, potentially, damage to the components.
FIG. 12 is an enlarged partial cross-sectional side view of a first alternative construction of the rotation controlling structure of the spindle lock system taken generally along line C–C′ in FIG. 14.
FIG. 14 is a partial cross-sectional view taken generally along line A–A′ in FIG. 12.
FIG. 15 is a partial cross-sectional view taken along line B–B′ in FIG. 12.
FIG. 22 is a cross-sectional view taken along line D–D′ in FIG. 21 and including the spring plate.
FIG. 27B is a cross-sectional view taken along line E–E′ in FIG. 27A.
FIG. 28B is a cross-sectional view taken along line F–F′ in FIG. 28A.
FIG. 28D is a cross-sectional view taken along line G–G′ in FIG. 28C.
FIG. 29B is a cross-sectional view taken along line H–H′ in FIG. 29A.
FIG. 30B is a cross-sectional view taken along line I–I′ in FIG. 30A.
FIG. 31B is a cross-sectional view taken along line J–J′ in FIG. 31A.
As shown in FIGS. 4–6, the locking structure 10″ generally includes a release ring 21, a spring or snap ring 22, two synchronizing and aligning or supporting rings 23, one or more locking members or wedge rollers 24, a lock ring 25, a rubber ring 26, a fixing ring 27 and the spindle 28. Except for the wedge rollers 24 and the spindle 28, the other components of the locking structure 10″ are generally in the shape of a ring extending about the same axis, such as the axis of the spindle 28. A lid ring 45 is attached to the fixing ring 27 such that the components of the locking structure 10″ are provided as a unit.
As shown in FIGS. 4–5, the release ring 21 includes pins 33 on opposite sides of the axis which are engaged and retained in connecting holes 34 formed on the carrier 15 so that the release ring 21 is fixed to and rotatable with the carrier 15. As shown in FIG. 6, the release ring 21 defines a hole-shaped connector 32 a which is substantially identical to the connector 32 formed in the carrier 15 to provide the free rotational angle α between the spindle 28 and the carrier 15 and release ring 21.
As shown in FIGS. 6–7, the snap ring 22 includes spring or snap arms 44 each having a controlling convex projection 43 formed at its free end. The projections 43 provide the other portion of the detent arrangement and are selectively engageable in one of a pair of corresponding recesses 42 a and 42 b. The snap ring 22 provides a resilient force to bias the projections into engagement with a selected one of the recesses 42 a and 42 b. The snap arms 44 are formed as arcuate arms extending generally in the same direction about the circumference from three equally separated positions on the body of the snap ring 22. The snap arms 44 are formed so that the projections 43 are selectively positionable in the associated recesses 42 a and 42 b. The resilient spring force on the projections 43 is provided by the elasticity and material characteristics of the snap arms 44.
FIGS. 12–15 illustrate a first alternative construction of the rotation control device of a spindle lock 10C. Common elements are identified by the same reference number “C”.
As shown in FIGS. 12–15, the rotation control device includes a snap ring 22C formed by two snap ring elements 22Ca and 22Cb. The snap ring elements 22Ca and 22Cb are substantially identical and are supported in a reversed orientation relative to one another to provide the snap ring 22C.
It should be understood, that in the earlier-described construction (shown in FIGS. 2–7), the snap ring 22 could include two separate snap ring elements (similar to snap ring elements 22Ca and 22Cb).
FIGS. 16–17 show a second alternative construction of the rotation controlling structure of a spindle lock 10D. Common elements are identified by the same reference number “D”.
FIGS. 18–19 show an alternative construction of the locking structure 10E′ of a spindle lock 10E. Common elements are identified by the same reference number “E”.
FIGS. 20–31B illustrate another construction of the spindle lock system similar in many ways to the illustrated constructions of FIGS. 1–19 described above. Accordingly, with the exception of mutually inconsistent features and elements between the construction of FIGS. 20–31B and the constructions of FIGS. 1–19, reference is hereby made to the description above accompanying the constructions of FIGS. 1–19 for a more complete description of the features and elements (and the alternatives to the features and elements) of the construction of FIGS. 20–31B. Features and elements in the construction of FIGS. 20–31B corresponding to features and elements in the constructions of FIGS. 1–19 are numbered in the 100 and 200 series.
As shown in FIGS. 27A–C, the fixing ring 127 is supportable in the housing 104 of a power tool (e.g., the power tools 100, 200 or 300) and includes forwardly extending protrusions 160 located along a front face 162. The protrusions 160 are engageable in corresponding recesses (not shown) located along the interior of the housing 104 to secure the fixing ring 127 in the housing 104 and to prevent movement of the fixing ring 127 with respect to the housing 104 (i.e., rotation about the spindle axis A). In other constructions (not shown), the fixing ring 127 can include recesses, and the housing 104 can include correspondingly shaped protrusions for engagement in the recesses of the fixing ring 127 to secure the fixing ring 127 in the housing 104 and to prevent rotation of the fixing ring 127 with respect to the housing 104. In yet another construction (not shown), the fixing ring 127 and the housing 104 may include other inter-engaging structure to substantially prevent relative rotation of the fixing ring 127 and the housing 104.
As shown in FIGS. 29A–C, a hole-shaped connecting part 135 extends axially through a central portion of the support ring 123 and has a substantially similar configuration to the connector 31 on the spindle 28. More particularly, the hole-shaped connecting part 135 includes one or more flat sides (e.g., one, two, three, etc.) for engagement with one or more corresponding flat sides of the connector 31. In this manner, the support ring 123 is fixable to and rotatable with the spindle 28 as the spindle 28 rotates in the forward and reverse rotational directions, respectively.
After the locking structure is released or unlocked, the connecting part 32 of the carrier 15 and the connecting part 31 of the spindle 28 are moved into driving engagement so that the driving force of the carrier 15 (and motor M) is transferred to the spindle 28 and the spindle 28 rotates with the carrier 15 about the spindle axis A. In addition, when the locking structure is released or unlocked, each of the projections 143 is positioned in one recess (i.e., recess 142 a, the “run” position recess).
When the inertia of the spindle 28 (and the chuck 120 and/or the tool element) is greater than the resilient force of the snap arms 144 and the drag force of the elastic ring 126 and the delay plate 147, the inertia overcomes the resilient force of the snap arms 144 and the drag force of the elastic ring 126 and the delay plate 147 so that the projections 143 move from one recess (i.e., recess 142 a) to the other recess (i.e., recess 142 b, the “lock” position recess). Movement of the projections 143 from one recess (i.e., recess 142 a) to the other recess (i.e., recess 142 b), resists the rotational inertia of the spindle 28 (and the chuck 120 and/or the tool element) and controls and buffers the rotational inertia of the spindle 28 (and the chuck 120 and/or the tool element) so that rotation of the spindle 28 is dissipated before the locking structure engages.
Therefore, the rotational inertia of the spindle 28 (and the chuck 120 and/or the tool element) is controlled and buffered by engagement of the projections 143 in the respective recesses (i.e., recesses 142 a) and movement to the other recesses (i.e., recesses 142 b) under the resilient spring force applied by the respective snap arms 144. The snap arms 144 also control the rotational force of the spindle 28 and delay the engagement of the wedges 224 and the locking wedge surfaces 137 so that there is no impact in the components of the spindle lock system 110, and no noise (no big “clunk”) is created when rotation of the spindle 28 is stopped. Also, because the rotational force of the spindle 28 is controlled there is no impact of the spindle lock 110 and rebound through the free rotational angle α so that the “chattering” phenomenon is also avoided.
FIG. 32 illustrates an alternative construction for the wedges 224. Common elements are identified by the same reference number “A”.
FIGS. 33–44 illustrate another construction of the spindle lock system similar in many ways to the illustrated constructions of FIGS. 1–32 described above. Accordingly, with the exception of mutually inconsistent features and elements between the construction of FIGS. 33–44 and the constructions of FIGS. 1–32, reference is hereby made to the description above accompanying the constructions of FIGS. 1–32 for a more complete description of the features and elements (and the alternatives to the features and elements) of the construction of FIGS. 33–44. Features and elements in the construction of FIGS. 33–44 corresponding to features and elements in the constructions of FIGS. 1–32 are numbered in the 300 and 400 series.
After the locking structure is released or unlocked, the connecting part 335 of the carrier 315 and the connecting part 31 of the spindle 28 are moved into driving engagement so that the driving force of the carrier 315 (and motor M) is transferred to the spindle 28 and the spindle 28 rotates with the carrier 315 about the spindle axis A. In addition, when the locking structure is released or unlocked, each of the projections 343 is positioned in one recess (i.e., recess 441 a, the “run” position recess).
When the inertia of the spindle 28 (and the chuck 120 and/or the tool element) is greater than the resilient force of the snap arms 444 and the drag force of the elastic ring 326 and the delay plate 347, the inertia overcomes the resilient force of the snap arms 444 and the drag force of the elastic ring 326 and the delay plate 347 so that the projections 443 move from one recess (i.e., recess 441 a) to the other recess (i.e., recess 441 b, the “lock” position recess). Movement of the projections 443 from one recess (i.e., recess 441 a) to the other recess (i.e., recess 441 b), resists the rotational inertia of the spindle 28 (and the chuck 120 and/or the tool element) and controls and buffers the rotational inertia of the spindle 28 (and the chuck 120 and/or the tool element) so that rotation of the spindle 28 is dissipated before the locking structure engages.
Therefore, the rotational inertia of the spindle 28 (and the chuck 120 and/or the tool element) is controlled and buffered by engagement of the projections 443 in the respective recesses (i.e., recesses 441 a) and movement to the other recesses (i.e., recesses 441 b) under the resilient spring force applied by the respective snap arms 444. The snap arms 444 also control the rotational force of the spindle 28 and delay the engagement of the protrusions 374 and the camming surfaces of the delay plate 347 and the carrier 315 so that there is no impact in the components of the spindle lock system 310, and no noise (no big “clunk”) is created when rotation of the spindle 28 is stopped. Also, because the rotational force of the spindle 28 is controlled there is no impact of the spindle lock 110 and rebound through the free rotational angle α so that the “chattering” phenomenon is also avoided.
It should be understood that components of the constructions illustrated in FIGS. 1–19 and FIGS. 20–44 may be substituted for one another.
US10796355 2001-03-14 2004-03-09 Power tool and spindle lock system Active US7063201B2 (en)
JP2004-61933 2004-03-05
JP2004061933A JP2005249110A (en) 2004-03-05 2004-03-05 Rotation output device
US10096441 Continuation-In-Part US6702090B2 (en) 2001-03-14 2002-03-12 Power tool and spindle lock system
US20040231952A1 true US20040231952A1 (en) 2004-11-25
US7063201B2 true US7063201B2 (en) 2006-06-20
ID=33458377
US10796355 Active US7063201B2 (en) 2001-03-14 2004-03-09 Power tool and spindle lock system
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