U.S. patent application number 13/837429 was filed with the patent office on 2013-10-31 for magnetic drill press.
The applicant listed for this patent is MILWAUKEE ELECTRIC TOOL CORPORATION. Invention is credited to Gareth Mueckl, Andrew M. Plowman, Terry L. Timmons, James Wekwert.
Application Number | 20130287508 13/837429 |
Document ID | / |
Family ID | 49477427 |
Filed Date | 2013-10-31 |
United States Patent
Application |
20130287508 |
Kind Code |
A1 |
Timmons; Terry L. ; et
al. |
October 31, 2013 |
MAGNETIC DRILL PRESS
Abstract
A magnetic drill press includes a magnetic base coupled to a
base housing for selective engagement with a ferromagnetic
workpiece. A motor carriage is slidably coupled to the base
housing, and an electric motor is supported by the motor carriage.
A bit is received by the electric motor for rotation about a bit
axis. An illumination system has at least one illuminator module
coupled to a surface of the magnetic base. The at least one
illuminator module is aligned to illuminate a work area of the
workpiece.
Inventors: |
Timmons; Terry L.;
(Waukesha, WI) ; Plowman; Andrew M.; (Wauwatosa,
WI) ; Mueckl; Gareth; (Milwaukee, WI) ;
Wekwert; James; (Brookfield, WI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
MILWAUKEE ELECTRIC TOOL CORPORATION |
Brookfield |
WI |
US |
|
|
Family ID: |
49477427 |
Appl. No.: |
13/837429 |
Filed: |
March 15, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61638158 |
Apr 25, 2012 |
|
|
|
Current U.S.
Class: |
408/16 |
Current CPC
Class: |
B23Q 17/2404 20130101;
Y10T 408/554 20150115; B25H 1/0071 20130101; B23B 47/26 20130101;
Y10T 408/6779 20150115; B23Q 17/2233 20130101; Y10T 408/21
20150115; B25H 1/0092 20130101; B23Q 5/32 20130101 |
Class at
Publication: |
408/16 |
International
Class: |
B23Q 17/24 20060101
B23Q017/24 |
Claims
1. A magnetic drill press comprising: a base housing; a magnetic
base coupled to the base housing for selective engagement with a
ferromagnetic workpiece; a motor carriage slidably coupled to the
base housing; an electric motor supported by the motor carriage; a
bit received by the electric motor for rotation about a bit axis;
and an illumination system, the illumination system having at least
one illuminator module coupled to a surface of the magnetic base,
the at least one illuminator module aligned to illuminate a work
area of the workpiece.
2. The magnetic drill press of claim 1, wherein the illumination
system is powered independent of the motor.
3. The magnetic drill press of claim 2, wherein the illumination
system is powered by a battery.
4. The magnetic drill press of claim 1, wherein the motor and the
illumination system are selectively controlled by a motor control
switch.
5. The magnetic drill press of claim 4, wherein the motor control
switch is coupled to the base housing.
6. The magnetic drill press of claim 1, wherein the at least one
illuminator module includes a laser.
7. The magnetic drill press of claim 1, wherein at least one
illuminator module includes a light-emitting diode.
8. The magnetic drill press of claim 1, further including a spindle
assembly supported by the base housing and coupled to the motor
carriage for selectively positioning the motor carriage relative to
the bit axis.
9. The magnetic drill press of claim 8, wherein a handle assembly
is coupled to the spindle assembly for user actuation of the motor
carriage.
10. The magnetic drill press of claim 9, wherein the handle
assembly includes a ratchet assembly for positioning the motor
carriage by reciprocating motion of the handle assembly.
11. A magnetic drill press comprising: a base housing; a magnetic
base coupled to the base housing for selective engagement with a
ferromagnetic workpiece; a motor carriage slidably coupled to the
base housing; an electric motor supported by the motor carriage; a
bit received by the electric motor for rotation about a bit axis; a
motor housing coupled to the motor carriage; and a laser coupled to
the motor housing for illumination of the workpiece along the bit
axis, the laser supported by the motor carriage for movement with
the motor.
12. The magnetic drill press of claim 11, wherein the laser is
selectively controlled by a motor control switch.
13. The magnetic drill press of claim 12, wherein the motor control
switch is coupled to the base housing.
14. The magnetic drill press of claim 11, wherein the laser is
powered by a battery.
15. The magnetic drill press of claim 11, wherein the laser is
partially disposed within the motor housing.
16. The magnetic drill press of claim 11, further including a
spindle assembly supported by the base housing and coupled to the
motor carriage for selectively positioning the motor carriage
relative to the bit axis.
17. The magnetic drill press of claim 16, wherein a handle assembly
is coupled to the spindle assembly for user actuation of the motor
carriage.
18. The magnetic drill press of claim 17, wherein the handle
assembly includes a ratchet assembly for positioning the motor
carriage by reciprocating motion of the handle assembly.
19. A magnetic drill press comprising: a base housing; a magnetic
base coupled to the base housing for selective engagement with a
ferromagnetic workpiece; a motor carriage slidably coupled to the
base housing; an electric motor supported by the motor carriage; a
bit received by the electric motor for rotation about a bit axis; a
motor housing coupled to the motor carriage; and a workpiece
illumination system coupled to at least one of the motor carriage,
the base housing, and the magnetic base for illumination of the
ferromagnetic workpiece along the bit axis.
20. The magnetic drill press of claim 19, wherein the workpiece
illumination system is housed within the motor housing.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to U.S. Provisional Patent
Application No. 61/638,158, filed on Apr. 25, 2012, the entire
contents of which are incorporated by reference herein.
BACKGROUND
[0002] The present invention generally relates to power tools and,
more specifically, to magnetic-base drill presses.
[0003] Magnetic-base drill presses perform drilling operations by
attaching a base portion of the drill press magnetically to a
ferromagnetic workpiece. The magnetic base of a magnetic drill
press is switchably operable between magnetized and demagnetized
positions using electromagnets or permanent magnets.
SUMMARY
[0004] In one embodiment, the invention provides a magnetic drill
press. The magnetic drill press includes a magnetic base coupled to
a base housing for selective engagement with a ferromagnetic
workpiece. A motor carriage is slidably coupled to the base
housing, and an electric motor is supported by the motor carriage.
A bit is received by the electric motor for rotation about a bit
axis. An illumination system has at least one illuminator module
coupled to a surface of the magnetic base. The at least one
illuminator module is aligned to illuminate a work area of the
workpiece.
[0005] In another embodiment the invention provides a magnetic
drill press. The magnetic drill press includes a magnetic base
coupled to a base housing for selective engagement with a
ferromagnetic workpiece. A motor carriage is slidably coupled to
the base housing, and an electric motor is supported by the motor
carriage. A bit is received by the electric motor for rotation
about a bit axis. A motor housing is coupled to the motor carriage.
A laser is coupled to the motor housing for illumination of the
workpiece along the bit axis. The laser is supported by the motor
carriage for movement with the motor.
[0006] In yet another embodiment the invention provides a magnetic
drill press. The magnetic drill press includes a magnetic base
coupled to a base housing for selective engagement with a
ferromagnetic workpiece. A motor carriage is slidably coupled to
the base housing. An electric motor is supported by the motor
carriage, and a bit is received by the electric motor for rotation
about a bit axis. A motor housing is coupled to the motor carriage.
A workpiece illumination system is coupled to at least one of the
motor carriage, the base housing, and the magnetic base for
illumination of the ferromagnetic workpiece along the bit axis.
[0007] Other aspects of the invention will become apparent by
consideration of the detailed description and accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a perspective view of a magnetic drill press
according to one embodiment of the invention.
[0009] FIG. 2 is a sectional view of the magnetic drill press of
FIG. 1, along section line 2-2.
[0010] FIG. 3 is a front view of the drill press of FIG. 1.
[0011] FIG. 4 is a perspective view of a housing and motor carriage
assembly of a drill press according to another embodiment of the
invention.
[0012] FIG. 5 is a perspective view of a handle ratchet assembly of
the housing and motor carriage assembly of FIG. 4.
[0013] FIG. 6 is a side view of a spindle assembly installed in the
housing and motor carriage assembly of FIG. 4.
[0014] FIG. 7 is a perspective view of the spindle assembly of FIG.
6.
[0015] FIG. 8 is a partially exploded view of the spindle assembly
of FIG. 7.
[0016] FIG. 9 is an exploded view of the spindle assembly of FIG.
7.
[0017] FIG. 10 is a section view of the spindle assembly taken
along section line 10-10 of FIG. 7.
[0018] FIG. 11 is a section view of the spindle assembly taken
along section line 11-11 of FIG. 7.
[0019] FIG. 12 is a front view of a magnetic drill press according
to another embodiment of the invention.
[0020] Before any embodiments of the invention are explained in
detail, it is to be understood that the invention is not limited in
its application to the details of construction and the arrangement
of components set forth in the following description or illustrated
in the following drawings. The invention is capable of other
embodiments and of being practiced or of being carried out in
various ways.
DETAILED DESCRIPTION
[0021] FIG. 1 illustrates a drill press 10 according to one
embodiment of the invention. The drill press 10 includes a base
housing 12 and a motor housing 14. An electric motor 18 is housed
within the motor housing 14 (FIG. 2). The drill press 10 further
includes a magnetic base 20 for magnetically detachably coupling
the drill press 10 and a ferromagnetic workpiece. Once magnetized,
the magnetic base 20 secures the drill press 10 to the workpiece
via a magnetic field generated by magnets 22 (FIG. 2).
[0022] Referring to FIG. 1, the drill press 10 includes an
electrical cord 24 to connect to an AC power source, such as a wall
outlet or a generator. The AC power source may be a conventional
120V or 240V power source. Referring to FIG. 2, the electric cord
24 is received in the base housing 12 and electrically coupled to a
power module 26. A motor control switch 28 is coupled to base
housing 12. The motor control switch 28 controls the supply of
power to the electric motor 18 from the power module 26.
[0023] The motor housing 14 and the motor 18 are coupled to a motor
carriage 30. A rack 32 is coupled to the motor carriage 30. A
pinion 34 is rotatably coupled to the base housing 12 about a
pinion axis 36. The pinion 34 engages the rack 32 for vertical
actuation of the motor carriage 30 along a carriage axis 38. The
pinion 34 is actuated by a user via a handle assembly 40 (FIG. 1).
The handle assembly includes a handle hub 42. Three handle members
44 are coupled to the handle hub 42 in a radial arrangement.
[0024] Referring to FIG. 2, the motor 18 is coupled to a bit drive
assembly 46. A bit 48 is selectively engageable with the bit drive
assembly 46 for rotation about a bit axis 50. The bit axis 50 is
substantially parallel to the carriage axis 38. Referring to FIG.
2, the bit drive assembly 46 defines a hollow passage 52 along the
bit axis 50.
[0025] A laser 54 is disposed within the motor housing 14 for
illumination along the bit axis 50. When used in combination with a
hollow-centered bit, such as a hole saw, the laser 54 illuminates a
workpiece along the bit axis 50. Thus, the laser 54 facilitates
alignment of the bit axis 50 with a desired drilling axis. In some
embodiments, the laser 54 may be electrically coupled to the power
module 26, and selectively controlled by the motor control switch
28 or a separate switch. In other embodiments, the laser 54 may be
powered by a separate power supply, such as a battery.
[0026] Referring to FIGS. 1 and 3, the drill press 10 includes a
workpiece illumination system 56. The workpiece illumination system
56 includes a first illuminator module 58 and, referring to FIG. 3,
a second illuminator module 60. The first illuminator module 58 is
coupled to a first side portion 62 of the magnetic base 20. The
second illuminator module 60 is coupled to a second side portion 64
of the magnetic base 20. Each of the first illuminator module 58
and the second illuminator module 60 includes a light assembly 65,
such as an incandescent bulb, or light emitting diode (LED). Each
of the first illuminator module 58 and the second illuminator
module 62 is aligned to illuminate a work area of the work piece.
In some embodiments, the workpiece illumination system 56 may be
electrically coupled to the power module 26, and selectively
controlled by the motor control switch 28, or a separate switch. In
other embodiments, the workpiece illumination system 56 may be
powered by a separate power supply, such as a battery.
[0027] FIG. 4 illustrates a base housing 66 and motor carriage 68
according to another embodiment of the invention. In the embodiment
of FIG. 4, a handle assembly 70 includes a handle hub 72. A first
handle member 74 and a second handle member 76 are coupled to the
handle hub 72. A ratchet assembly 78 is additionally coupled to the
handle hub 72. The ratchet assembly 78 includes a ratchet head
portion 80 and a ratchet handle portion 82 coupled to the ratchet
head portion 80. The ratchet assembly 78 allows a user to actuate
the handle hub 72 with reciprocating motion of the ratchet handle
portion 82.
[0028] Referring to FIG. 5, the handle hub 72 includes a drive
member 84. The drive member 84 is configured to be received by a
square drive socket 86 of a spindle assembly 88 (FIG. 6). The
spindle assembly 88 acts as an interface between the handle
assembly 70 and the base housing pinion, such as the pinion 34 of
FIG. 2.
[0029] Referring to FIG. 7, the spindle assembly 88 includes a
collar 90. The collar 90 is fixedly coupled to the base housing 66,
as illustrated in FIG. 6. Referring to FIG. 11, the collar 90 has a
hollow center 92 extending between a handle end 94 and a pinion end
96 along a spindle axis 98. Referring to FIG. 9, the collar 90
defines a toothed portion 102 between the handle end 94 and the
pinion end 96. The toothed portion 102 includes axially-extending,
radially projecting, tooth members 104.
[0030] An inner spindle 106 is rotatably coupled to the collar 90.
The inner spindle 106 includes a substantially cylindrical body
108, extending from a pinion end 110 to a hub end 112 along the
pinion axis 98. The pinion end 110 is coupled to the pinion 34
(FIG. 2) for rotation of the pinion 34 about the pinion axis 36
and, thereby, to actuate the rack 32 of the motor carriage 30.
Referring to FIG. 9, the hub end 112 of the inner spindle 106
defines two engagement recesses 114 and a threaded aperture
116.
[0031] A spindle hub assembly 118 includes a hub body 120. The hub
body 120 includes a cylindrical portion 122 and a dog actuator
portion 124. Referring to FIG. 11, the cylindrical portion 122
receives two drive pins 126 for driving engagement with the
engagement recesses 114 of the inner spindle 106. Referring to FIG.
10, the dog actuator portion 124 defines five radial lobes 128 and
five radial recesses 130, with the radial lobes 128 and radial
recesses 130 alternating circumferentially about the spindle axis
98. Referring to FIG. 9, the dog actuator portion 124 also receives
a torque transfer link 132. More specifically, the torque transfer
link 132 is fixedly received in a circular recess 134 defined in
the dog actuator portion 124. The torque transfer link 132 defines
a pair of opposing convex surfaces 136, separated by a pair of
flat, mutually parallel surfaces 138.
[0032] Referring to FIGS. 7 and 10, an outer spindle 140 is
rotatably coupled to the collar 90 at the handle end 94. The outer
spindle 140 defines, on a first end 142, the square drive socket 86
to which the handle assembly 70 is selectively coupled. Referring
to FIG. 8, a dog carrier hub 144 and five dog lugs 146 extend
axially from the second end 148 of the outer spindle 140. Each of
the dog carrier lugs 146 extends radially from a substantially
circular dog hub 148. In the illustrated embodiment, five dog
carrier lugs 146 are circumferentially evenly arranged about the
spindle axis 98. Each dog carrier lug 146 defines a first alignment
surface 150, a second alignment surface 152, and a circumferential
surface 154.
[0033] The dog hub 148 defines a torque transfer recess 156. The
torque transfer recess 156 includes a pair of opposing convex walls
158, separated by a pair of opposing concave wall 160. The torque
transfer recess 156 is configured to rotatably receive the torque
transfer link 132. More specifically, the convex surfaces 160 of
the torque transfer recess 156 allow for a small degree of relative
rotation (e.g., less than ten degrees) between the outer spindle
140 and the torque transfer link 132.
[0034] Referring to FIG. 9, five dog members 162 are arranged
circumferentially about the pinion axis 98, between the outer
spindle 140 and the hub body 120. An outer end 164 of each dog
member 162 defines a groove 166 configured to receive the dog
carrier lugs 146. Referring to FIG. 8, non-radial side walls 168 of
the grooves 166 are configured to be engaged by the first alignment
surface 150 or second alignment surface 152 of the dog carrier lugs
146. Referring to FIG. 10, an inner radial surface 170 of each dog
member 162 defines a dog cam lobe 172.
[0035] Referring to FIGS. 9 and 11, the spindle assembly 88 is
assembled with a shoulder bolt 174. More specifically, the shoulder
bolt 174 extends through the outer spindle 140 and the hub assembly
118 to threadedly engage the threaded recess 116 of the inner
spindle 106. The dog members 162 float between the outer spindle
140, the hub assembly 118, and the hollow center 92 of the collar
90.
[0036] When the handle assembly 70 (FIG. 4) is actuated by a user
to, for example, drive a bit into a work piece, the drive member 84
(FIG. 5) transmits torque to the outer spindle 140 at the square
drive socket 86 (FIG. 7). After a small degree of rotation (e.g.,
less than 10 degrees), torque applied to the outer spindle is
transmitted to torque transfer link 132 via the torque transfer
recess 156 of the outer spindle (FIG. 8). Referring to FIG. 11,
from the torque transfer link 132, torque is transmitted through
the cylindrical portion 122. From the cylindrical portion 122, the
torque is transferred to the inner spindle 106 via the drive pins
126. Simultaneously, and with reference to FIG. 8, the first
alignment surfaces 150 or second alignment surfaces 152 (depending
upon a direction of rotation about the spindle axis 98) of the dog
carrier lugs 146 engage the non-radial side walls 168 of the dog
members 162 and biases the dog members 162 radially inward, thereby
substantially preventing the dog members 162 from binding
engagement with the teeth 104 (FIG. 9) of the collar 90.
[0037] When a user releases the handle assembly 70 (FIG. 4), the
dog carrier lugs 146 no longer force the dog members 162 in an
inwardly radial direction. Furthermore, any torque applied to the
inner spindle 106 (e.g., from the weight of the motor carriage 68)
causes the hub assembly 118 to rotate relative to the outer spindle
140, until the torque transfer link 132 reengages the torque
transfer recess 156 (e.g., less than ten degrees of rotation).
Referring to FIG. 10, the rotation of the hub assembly 118 causes
the radial lobes 128 of the dog actuator portion 124 to engage the
dog cam lobes 172, thereby forcing the dog members 162 radially
outward, and into engagement with the teeth 104 of the collar 90.
Engagement of the dogs 162 with the collar 90 substantially
inhibits further rotation of the inner spindle 106, effectively
causing "spindle lock." In order to disengage the spindle lock
condition, a user merely applies torque through the outer spindle
140 (via the handle assembly 70), thereby disengaging the dog
members 162 from the teeth 104 of the collar 90 by applying an
inward radial force from the dog carrier lugs 146. This
substantially automatic spindle lock operation is especially
advantageous when using the ratchet assembly 78, as the spindle
assembly 88 maintains its position while cycling the ratchet
assembly 78.
[0038] FIG. 12 illustrates another embodiment of a drill press 178.
The drill press has substantial similarities to the drill press 10
described with respect to FIGS. 1-11, and only those aspects that
differ from the embodiments of FIGS. 1-11 will be described
herein.
[0039] The drill press 178 includes a base housing 182, and a motor
housing 186. Referring to FIG. 12, the drill press 178 further
includes a magnetic base 190 for magnetically detachably coupling
the drill press 178 and a ferromagnetic workpiece.
[0040] Referring to FIG. 12, the drill press 178 includes a
workpiece illumination system 194. The workpiece illumination
system 194 is coupled to a top portion 198 of the magnetic base
190. The workpiece illumination system 194 includes a first
illuminator module 202 and a second illuminator module 206. Each of
the first illuminator module 202 and the second illuminator module
206 includes a light assembly 210, such as an incandescent bulb, or
light emitting diode (LED). Each of the first illuminator module
202 and the second illuminator module 206 is aligned to illuminate
a work area of the work piece. In the illustrated embodiment, the
first illuminator 202 and the second illuminator 206 are aligned to
illuminate a work area along the bit axis 50.
[0041] Thus, the invention provides, among other things, a
magnetic-base drill press. Various features and advantages of the
invention are set forth in the following claims.
* * * * *