Magnetic drill press

Abstract

To provide improvement in a magnetic drill press.SOLUTION: A magnetic drill press includes: a magnetic base; a main body portion coupled to the magnetic base; a drill unit including a spindle and supported by the main body portion to be movable in a direction parallel to the rotation axis of the spindle; a battery attachment portion configured to detachably hold a battery; and a cover configured to at least partially cover the battery attachment portion. The battery attachment portion includes: a rail configured to slidably engage with the groove of the battery in response to the battery being moved relative to the rail from a first side to a second side in a first direction; and a terminal portion having a terminal configured to be electrically connected with the terminal of the battery. The cover is displaceable relative to the main body portion, and configured to overlap the entirety of the terminal portion, when the cover is at a first position and viewed from the first side in the first direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a magnetic drilling machine. [Background technology]

[0002] A magnetic drilling press is a device that is fixed to a workpiece made of a magnetic material by magnetic force, and drills holes in the workpiece using a tip tool attached to an electric drill while moving the electric drill supported on the main body relative to the workpiece.

[0003] For example, Patent Document 1 discloses a magnetic drilling machine that operates using a battery as a power source. Also, for example, Patent Document 2 discloses a magnetic drilling machine that can supply cutting fluid contained in a tank to a tip tool to prevent the tip tool from seizing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-157471 A [Patent Document 2] JP 2011-104678 A Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned magnetic drilling machines leave room for improvement. The present disclosure aims to provide an improvement in magnetic drilling machines. [Means for solving the problem]

[0006] According to one non-limiting aspect of the present disclosure, a magnetic drilling machine is provided, which includes a magnetic base, a main body, a drill unit, a battery mounting portion, and a cover. The magnetic base is configured to be selectively fixed to a workpiece by magnetic force. The main body is coupled to the magnetic base. The drill unit includes a spindle configured to removably hold a tool tip. The drill unit is supported by the main body so as to be axially movable with respect to a rotation axis of the spindle. That is, the drill unit is supported by the main body so as to be axially movable with respect to a rotation axis of the spindle. The battery mounting portion is configured to removably hold a battery for supplying power to the magnetic drilling machine. The battery mounting portion may be provided on the main body or on the drill unit. The cover is configured to at least partially cover the battery mounting portion.

[0007] The battery mounting portion includes a rail and a terminal portion. The rail extends linearly in a first direction. The rail is configured to slide-engage with a groove of the battery in response to the battery being moved from a first side toward a second side in the first direction relative to the rail. The terminal portion has a terminal configured to electrically connect with a terminal of the battery in response to the battery being placed at a predetermined position in the battery mounting portion. The cover is displaceable with respect to the main body portion and configured to overlap the entire terminal portion when the cover is in the first position as viewed from the first side in the first direction. In other words, when the cover in the first position is projected from the first side in the first direction, the entire terminal portion is included within a projection area of ​​the cover.

[0008] According to this aspect, the cover arranged at the first position can reduce the possibility that chips will enter the battery mounting portion from the first side in the first direction and adhere to the terminal portion. Also, the cover arranged at the first position can reduce the possibility that some impact will be applied to the terminal portion from the first side in the first direction and the terminal portion will be damaged. Note that the cover may be configured to overlap the entire battery mounting portion when viewed from the first side in the first direction when the cover is in the first position.

[0009] According to another non-limiting aspect of the present disclosure, there is provided a magnetic drilling machine including a magnetic base, a battery housing, a guide portion, a guided portion, a motor, a drill unit, and a cover. The magnetic base is configured to be selectively fixed to a workpiece by magnetic force. The battery housing is connected to an upper side of the magnetic base and has an opening at an upper portion. The guide portion is connected to the battery housing. The guided portion is guided in the up and down direction by the guide portion. The motor is connected to the guided portion and rotates by power supplied from the battery housing. The drill unit includes a spindle rotated by the motor. The cover is configured to cover the opening.

[0010] According to this aspect, the cover can cover the opening at the top of the battery housing portion, thereby reducing the possibility of cutting chips entering the inside of the battery housing portion from the outside. Also, the cover can protect the battery.

[0011] According to another non-limiting aspect of the present disclosure, a magnetic drilling machine is provided, the magnetic drilling machine including a magnetic base, a body, and a drill unit. The magnetic base is configured to be selectively fixed to a workpiece by magnetic force. The body is coupled to the magnetic base. The drill unit is supported by the body so as to be movable in a first direction. The drill unit also includes a motor, a spindle, a fan, a housing, and an exhaust nozzle. The spindle is configured to removably hold a tool bit. The spindle is also configured to be rotated by the motor about a rotation axis extending in the first direction. The fan is configured to be rotated by the motor. The housing accommodates the motor, the spindle, and the fan. The housing has at least one air intake and at least one exhaust. The exhaust nozzle includes a tubular portion having at least partial flexibility and is coupled to the at least one exhaust.

[0012] According to this aspect, the air that flows into the housing through the intake port in response to the rotation of the fan and flows out of the exhaust port can be discharged through the exhaust nozzle connected to the exhaust port and used to cool the tool bit. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view of the magnetic drilling machine of the first embodiment, showing the cover in a closed position. FIG. [Diagram 2] FIG. 2 is another perspective view of the magnetic drilling machine with the cover in the closed position. [Diagram 3] FIG. 2 is a cross-sectional view of the magnetic drilling machine with the cover in the closed position. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 2 is a top view of the magnetic drilling machine. [Figure 6] FIG. 2 is a perspective view of the magnetic drilling machine with the cover in the open position. [Figure 7] FIG. 2 is a cross-sectional view of the magnetic drilling machine with the cover in the open position. [Figure 8] FIG. 11 is a partial perspective view of a magnetic drilling machine according to a second embodiment. [Figure 9] FIG. 2 is a perspective view of an exhaust nozzle. [Figure 10] FIG. 4 is a cross-sectional view for explaining a connection mode between an exhaust port and an exhaust nozzle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] In a non-limiting embodiment of the present disclosure, the cover may be configured to substantially cover the entire portion of the battery attached to the battery mounting portion that is exposed from the battery mounting portion when the cover is in the first position. According to this embodiment, the cover in the first position can protect the battery and the terminal portion from impacts from various directions.

[0015] In addition to or instead of the above embodiment, the battery mounting portion may include a recess configured to fit at least a portion of the battery. The recess may have an opening on a first side in the first direction. The cover may be configured to substantially close the opening of the recess when the cover is in the first position. According to this embodiment, when the cover is disposed in the first position, the wall portion defining the recess and the cover can substantially cover the entire battery. This can reliably reduce the possibility of chips entering the battery mounting portion. Also, the wall portion defining the recess and the cover can protect the battery and the terminal portion from impacts from various directions.

[0016] Additionally or alternatively, the recess may be configured to accommodate at least half of the battery, which can provide more effective protection for the battery from shocks.

[0017] In addition to or in place of the above embodiment, the magnetic drilling machine may further include a locking member configured to lock the cover in the first position relative to the body. According to this embodiment, when the magnetic drilling machine is oriented such that the first side faces the direction of gravity, the cover can reduce the possibility of the battery falling off.

[0018] In addition to or instead of the above embodiment, the cover may be coupled to the body so as to be rotatable between a first position and a second position. The cover may be configured to allow attachment and detachment of the battery when the cover is in the second position. According to this embodiment, a cover with good operability is realized.

[0019] In addition to or instead of the above embodiment, the first direction may be an axial direction (i.e., a direction parallel to the rotation axis of the spindle) with respect to the rotation axis of the spindle. According to this embodiment, when the magnetic drilling machine is in a position in which the rotation axis of the spindle extends vertically, even if there is a wall or the like around the magnetic drilling machine, it is easy to attach and detach the battery.

[0020] In addition to or instead of the above embodiment, the exhaust nozzle may be removably connected to at least one exhaust port, which improves convenience when the cutting fluid supplied from the container can be used or when the magnetic drilling machine is not in use.

[0021] In addition to or instead of the above embodiment, the at least one exhaust port may include a plurality of exhaust ports arranged at different positions in the circumferential direction around the rotation axis of the spindle. The exhaust nozzle may be selectively connectable to one of the plurality of exhaust ports. According to this embodiment, the user can connect the exhaust nozzle to an appropriate position depending on the working environment of the magnetic drilling machine (e.g., adjacent obstacles), thereby improving convenience.

[0022] In addition to or instead of the above embodiment, the exhaust nozzle may be configured to be connectable to at least one exhaust port without using a separate auxiliary device. According to this embodiment, a user can easily connect the exhaust nozzle to the exhaust port. Note that, as a connection mode of the exhaust nozzle to the exhaust port, for example, a snap fit using a flexible locking piece, a screw-in, or an engagement using a bayonet structure can be adopted.

[0023] In addition to or instead of the above embodiment, the exhaust nozzle may include a connector configured to be removably connected to at least one exhaust port, and a nozzle portion having an outlet. At least one of the connector and the nozzle portion may be removably connected to the tubular portion. According to this embodiment, a user can replace the connector and / or the nozzle portion depending on the configuration of the exhaust port of the magnetic drilling machine, the size of the desired outlet, etc., thereby improving convenience.

[0024] Additionally or alternatively, the tubular portion may be configured to retain its shape in a curved state, allowing the exhaust nozzle to stably direct air to a desired location.

[0025] Representative and non-limiting embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0026] First Embodiment A magnetic drilling machine 1A according to a first embodiment will be described with reference to Figs. 1 to 7. The magnetic drilling machine 1A is a portable electric tool. More specifically, the magnetic drilling machine 1A is an electric tool configured to drill holes in a workpiece 99 (shown only in Fig. 3) made of a magnetic material (e.g., iron) using an electric drill while being fixed to the workpiece 99 using magnetic force. The magnetic drilling machine 1A is also called a magnetic drill or a magnetic drilling device.

[0027] First, a schematic configuration of the magnetic drilling machine 1A will be described. As shown in FIG. 1 and FIG. 2, the magnetic drilling machine 1A includes a magnetic base 2 configured to be selectively fixed to a workpiece 99 by a magnetic force, a main body 3 connected to the magnetic base 2, and a drill unit 4 supported by the main body 3. The drill unit 4 includes a spindle 45 configured to removably hold a tip tool 91 (e.g., an annular cutter, a twist drill bit). The drill unit 4 is supported by the main body 3 so as to be movable in the axial direction of the rotation axis R1 of the spindle 45 (a direction substantially parallel to the rotation axis R1) relative to the main body 3. The drill unit 4 moves in response to a handle 32 provided on the main body 3 being manually operated by a user. While the drill unit 4 is moved in a direction approaching the workpiece 99, a hole is formed in the workpiece 99 by the tip tool 91 rotated together with the spindle 45.

[0028] The detailed configuration of the magnetic drilling machine 1A will be described below.

[0029] First, the magnetic base 2 will be described. As shown in FIG. 3, the magnetic base 2 includes a holder 21 having an abutment surface 211 that can abut against the workpiece 99, and a magnet 20 supported by the holder 21. In this embodiment, a permanent magnet is used for the magnet 20. The magnet 20 is supported by the holder 21 so as to be rotatable around a rotation axis R2. The rotation axis R2 extends in a direction substantially perpendicular to the rotation axis R1 of the spindle 45. Since this is a well-known technique, detailed illustrations and explanations are omitted, but the magnetic force acting on the workpiece 99 changes according to the change in the position of the magnet 20 around the rotation axis R2. When the magnet 20 is placed at a predetermined position around the rotation axis R2, the workpiece 99 is attracted to the abutment surface 211 by the magnetic force generated by the magnet 20 and fixed.

[0030] In the following description, for convenience, the extension direction of the rotation axis R1 of the spindle 45 is defined as the vertical direction of the magnetic drilling machine 1A. In the vertical direction, the side where the abutment surface 211 is located is defined as the lower side of the magnetic drilling machine 1A, and the opposite side is defined as the upper side. In addition, the extension direction of the rotation axis R2 of the magnet 20 is defined as the front-rear direction of the magnetic drilling machine 1A. In the front-rear direction, the side where the spindle 45 is located with respect to the magnetic base 2 is defined as the front side of the magnetic drilling machine 1A, and the opposite side is defined as the rear side. In addition, the direction perpendicular to the rotation axis R1 of the spindle 45 and the rotation axis R2 of the magnet 20 is defined as the left-right direction of the magnetic drilling machine 1A.

[0031] Next, the main body 3 will be described. As shown in Figs. 1 to 3, the main body 3 is connected to the magnetic base 2 on the opposite side to the contact surface 211 in the vertical direction of the magnetic drilling machine 1A. In other words, the main body 3 is disposed above the magnetic base 2. The main body 3 is a support that supports the drill unit 4, and is also called a drill stand.

[0032] A manual operation member 25 for rotating the magnet 20 is disposed at the lower rear end of the main body 3. In this embodiment, the manual operation member 25 is a knob that is rotatable around an axis parallel to the rotation axis R2, and is operably connected to the magnet 20. A user can rotate the magnet 20 around the rotation axis R2 by operating the manual operation member 25 (rotating the knob), thereby changing the strength of the magnetic force acting on the workpiece 99, that is, the degree of fixation of the magnetic base 2 to the workpiece 99. The manual operation member 25 for rotating the magnet 20 may be, for example, a slide-type lever. The manual operation member 25 may be provided on the magnetic base 2 instead of the main body 3.

[0033] As shown in FIG. 3 and FIG. 4, the main body 3 has a battery mounting section 33 configured to removably receive the battery 93. The battery 93 is a rechargeable battery having a known configuration, and includes a roughly rectangular parallelepiped case 930 with a plurality of battery cells built in. Of the six faces of the case 930, one face having the largest area is provided with a locking member 934 movable between a protruding position and a retracted position, and a terminal section 937 having a terminal. On two opposing faces other than this face, a groove 931 is formed that extends linearly in the longitudinal direction of the battery 93. The length, width, and height of the battery 93, and the arrangement of the locking member 934, the terminal section 937, and the groove 931 can be set arbitrarily. Thus, for example, the above-mentioned locking member 934 and the terminal section 937 may be arranged on one face having the smallest area, or on one face having an intermediate area between the largest area and the smallest area. The configuration of the battery mounting section 33 that receives the battery 93 will be described in detail later.

[0034] The connection structure between the main body 3 and the drill unit 4 will be described below. As shown in Figures 1 and 3, the drill unit 4 is connected to the main body 3 so as to be movable in the up and down directions relative to the main body 3. More specifically, the main body 3 and the drill unit 4 are connected via a rail 30 provided on the main body 3 and a rack 44 provided on the drill unit 4.

[0035] The rail 30 is disposed at the front end of the main body 3 and extends linearly in the vertical direction. The rack 44 is rod-shaped and extends vertically, and is disposed at the rear end of the drill unit 4 (specifically, fixed to the rear end of the housing 40 described later), and engages with the rail 30 so as to be slidable in the vertical direction. Although detailed illustration is omitted, the teeth of the rack 44 are formed on the rear surface of the rack 44. The rack 44 meshes with the pinion 321. The pinion 321 is operably connected to the handle 32 that can be manually operated by the user. When the pinion 321 is rotated in response to manual operation of the handle 32, the drill unit 4 having the rack 44 is moved linearly in the vertical direction relative to the main body 3.

[0036] Thus, in this embodiment, the rack 44 and the pinion 321 constitute a movement mechanism of the drill unit 4 relative to the main body 3. The rack 44 also constitutes a part of a connecting structure that connects the drill unit 4 and the main body 3 to be relatively movable in the up-down direction. However, the connecting structure and the moving mechanism between the drill unit 4 and the main body 3 are not limited to this example, and any known connecting structure and moving mechanism may be adopted. For example, a feed screw mechanism including a feed screw shaft and a nut may be adopted as the moving mechanism of the drill unit 4. Also, for example, the connecting mechanism and the moving mechanism may be provided separately.

[0037] Hereinafter, a detailed description will be given of the drill unit 4. As shown in Fig. 1 and Fig. 3, the drill unit 4 of this embodiment includes a housing 40, a spindle 45, a motor 47, a fan 48, and a controller 49.

[0038] The housing 40 is a hollow box-shaped body. In this embodiment, the spindle 45, the motor 47, the fan 48, and the controller 49 are accommodated in the housing 40. More specifically, the spindle 45 is accommodated in the lower half of the housing 40. The motor 47, the fan 48, and the controller 49 are accommodated in the upper half of the housing 40. Therefore, in the following description, the lower half of the housing 40 is also referred to as the spindle accommodating section 41, and the upper half of the housing 40 is also referred to as the motor accommodating section 42. Since a lubricant is placed in the spindle accommodating section 41, the spindle accommodating section 41 and the motor accommodating section 42 are separated by a partition wall.

[0039] The motor accommodating section 42 is generally rectangular box-shaped and includes an upper wall portion 421, a front wall portion 422, left and right side wall portions 423, and a rear wall portion 424. An air intake port 431 for letting air flow into the housing 40 is provided at the upper end portion of the motor accommodating section 42. More specifically, the air intake port 431 is provided at the upper end portion of each of the side wall portions 423 (i.e., a total of two locations). An exhaust port 432 for letting air out of the housing 40 is provided at the lower end portion of the motor accommodating section 42. More specifically, the exhaust port 432 is provided at the lower end portion of the front wall portion 422 and each of the lower end portions of the side wall portions 423 (i.e., a total of three locations).

[0040] The spindle 45 is supported rotatably around the rotation axis R1 relative to the housing 40. The lower end of the spindle 45 protrudes downward from the lower end of the housing 40 (spindle accommodating portion 41). The lower end of the spindle 45 has a tool attachment portion 450 configured to removably hold the tool tip 91. The tool attachment portion 450 is also called a chuck, an arbor, or the like. The tool attachment portion 450 holds the tool tip 91 so that the central axis of the tool tip 91 coincides with the rotation axis R1.

[0041] The spindle 45 has an insertion hole 455 that extends linearly upward from the lower end of the spindle 45 along the rotation axis R1. The insertion hole 455 is configured to receive a pilot pin 92. The pilot pin 92 is a well-known part used to align the rotation axis R1 of the spindle 45, and thus the center of a hole formed in the workpiece 99 by the tip tool 91, to a desired point on the workpiece 99. The pilot pin 92 is inserted and held in a through hole 911 of the tip tool 91, and is linearly movable along the central axis of the tip tool 91.

[0042] Although not shown in the drawings because this is a well-known configuration, a container that stores cutting fluid can be selectively attached to the magnetic drilling machine 1A, and a flow path for supplying cutting fluid to the tip tool 91 is formed inside the spindle 45. When the pilot pin 92 is pressed against the workpiece 99 and moves upward, the flow path is opened and cutting fluid is supplied to the tip tool 91 through the flow path.

[0043] The motor 47 is operably connected to the spindle 45 and configured to drive the spindle 45 to rotate. In this embodiment, an output shaft 471 of the motor 47 extends parallel to the spindle 45. A lower end of the output shaft 471 protrudes into the spindle accommodating portion 41, and a drive gear is formed on this portion. The drive gear meshes with a driven gear fixed to an upper end of the spindle 45. The drive gear and the driven gear form a gear train for reduction.

[0044] The fan 48 is fixed to the output shaft 471 below the stator of the motor 47 and rotates integrally with the output shaft 471. The fan 48 is located within the lower end of the motor housing 42, and the above-mentioned exhaust port 432 is disposed radially outward of the fan 48. When the fan 48 rotates in conjunction with the driving of the motor 47, a flow of air is generated that flows into the motor housing 42 through the intake port 431 and flows out of the motor housing 42 through the exhaust port 432. The air that flows in from the intake port 431 cools the motor 47 as it flows toward the exhaust port 432.

[0045] The controller 49 is a control device configured to control the operation of the magnetic drilling machine 1A. The controller 49 controls the driving of the motor 47 based on the on / off state of a motor switch (not shown) manually operated by a user. The controller 49 is disposed above the motor 47 and below the air intake 431 (or at approximately the same position as the air intake 431 in the vertical direction). Therefore, the air flow generated by the fan 48 can also cool the controller 49.

[0046] It should be noted that the motor 47 and / or the controller 49 do not necessarily need to be housed in the housing 40 as in the above example, and may be housed inside the main body 3, for example.

[0047] The detailed configuration of the battery mounting portion 33 will be described below.

[0048] 2 and 3, the battery mounting portion 33 is provided at the rear of the main body 3. The battery mounting portion 33 includes a storage recess 34 into which the battery 93 is partially fitted. More specifically, the storage recess 34 is defined by a bottom surface, left and right side surfaces, and a front surface, and is open upward. The depth of the storage recess 34 is configured so that when the battery 93 is fitted into the storage recess 34, approximately half of the battery 93 in the longitudinal direction is covered.

[0049] As shown in FIGS. 3 and 4, the battery attachment portion 33 includes a pair of rails 341, a lock recess 344, and a terminal portion 347.

[0050] 4, the rails 341 are provided on the side walls that define the left and right side surfaces of the storage recess 34, respectively, and extend substantially parallel to each other in the vertical direction. The rails 341 are configured to be slidably engaged with the grooves 931 of the battery 93. With such an arrangement of the rails 30, the battery 93 is attached to the battery attachment portion 33 so that the longitudinal direction of the battery 93 substantially coincides with the vertical direction of the magnetic drilling machine 1A.

[0051] Therefore, the direction of movement of the battery 93 when it is installed (hereinafter referred to as the battery installation direction) is from the top to the bottom in the vertical direction, and the direction of movement of the battery 93 when it is removed (hereinafter referred to as the battery removal direction) is from the bottom to the top in the vertical direction.

[0052] If the mounting and removal directions of the battery 93 are in the front-rear or left-right directions, the battery 93 will hit the wall and will not be able to be moved appropriately if there are walls around the magnetic drilling machine 1A (front, back, left, right). This makes it impossible to mount and remove the battery 93 from the battery mounting section 33. In contrast, the magnetic drilling machine 1A is used in a state in which the lower abutment surface 211 of the magnetic base 2 abuts against the workpiece 99 (see FIG. 3), so there is a relatively low possibility that there is a wall or the like above the battery mounting section 33. Therefore, by defining the mounting and removal directions of the battery 93 as described above, it becomes easy to mount and remove the battery 93 even if there are walls or the like around the magnetic drilling machine 1A.

[0053] As shown in FIG. 3, the lock recess 344 is provided at the upper end of the front wall that defines the front surface of the storage recess 34. The lock recess 344 is configured to be able to engage with the lock member 934 of the battery 93 when the lock member 934 is in the protruding position. When attaching the battery 93, the user slides the battery 93 in the attachment direction with the lock member 934 disposed on the upper side and the rail 341 engaged with the groove 931. When the battery 93 reaches a predetermined position, the lock member 934, which was once moved to the retracted position, returns to the protruding position and engages with the lock recess 344 to be locked. This holds the battery 93 in the predetermined position.

[0054] 3 and 4, the terminal portion 347 is supported below the lock recess 344 on the front wall portion of the accommodating recess 34. The terminal portion 347 includes a terminal 348 electrically connectable to a terminal of the terminal portion 937 of the battery 93, and a support member 349 supporting the terminal 348. The support member 349 is supported by the main body 3. As described above, when the battery 93 is placed at a predetermined position in the battery attachment portion 33, the terminal of the battery 93 is electrically connected to the terminal 348.

[0055] 2, 3 and 5, the main body 3 is provided with a cover 35 configured to cover the battery attachment portion 33. The cover 35 is configured to be displaceable between a closed position (see FIGS. 2, 3 and 5) in which it covers an opening 340 at the upper end of the accommodating recess 34, and an open position (see FIGS. 6 and 7) in which it opens the opening 340 so that the battery 93 can be attached and detached. More specifically, the cover 35 is supported by the main body 3 so as to be rotatable about a rotation axis R3 extending in the left-right direction of the main body 3.

[0056] As shown in Figs. 2 and 3, the cover 35 of this embodiment is configured to substantially block the entire opening 340 of the storage recess 34 (substantially cover the entire storage recess 34) when in the closed position. Note that "the cover 35 substantially blocks the entire opening 340" means that the edge of the cover 35 is in contact with the main body 3, but may also include a mode in which the edge is partially slightly separated from the main body 3. As described above, approximately half of the battery 93 attached to the battery attachment portion 33 in the longitudinal direction protrudes upward from the storage recess 34 and is exposed to the outside of the storage recess 34. The cover 35 is configured to substantially cover the entire exposed portion of the battery 93 without interfering with the exposed portion of the battery 93 when placed in the closed position.

[0057] As described above, the battery 93 is moved up and down relative to the battery mounting portion 33 when it is attached and removed. Therefore, as shown in Figures 6 and 7, the cover 35 is configured to ensure a space necessary for attaching and removing the battery 93 above the battery mounting portion 33 when it is placed in the open position.

[0058] The cover 35 also includes a locking member 353 configured to lock the cover 35 to the main body 3 in the closed position. The locking member 353 is provided on a portion of the edge of the cover 35 that abuts against the main body 3 at a position substantially farthest from the rotation axis R3 of the cover 35. The locking member 353 in this embodiment is a rotatable hook-shaped member that can engage with the main body 3. The locking member 353 is configured to lock the cover 35 so that it cannot be rotated to the open position by engaging with the main body 3 when the cover 35 is placed in the closed position. Note that the configuration for locking the cover 35 to the main body 3 in the closed position is not limited to this locking member 353 and can be changed as appropriate. For example, the cover 35 may be locked to the main body 3 in the closed position using a snap-fit ​​engagement.

[0059] During drilling operation using the magnetic drilling machine 1A, metal chips are likely to scatter. In response to this, the cover 35 is placed in the closed position, thereby reducing the possibility that chips will enter the battery mounting portion 33 and adhere to the terminals 348 of the terminal portion 347. In particular, in this embodiment, the cover 35 substantially blocks the opening 340 of the accommodating recess 34, and therefore can prevent chips from entering the accommodating recess 34 from any direction. This reliably reduces the possibility that chips will adhere to the terminal portion 347, causing malfunctions.

[0060] Furthermore, the cover 35 placed in the closed position can reduce the possibility that the battery 93 and / or the terminal portion 347 may be damaged due to some kind of external impact being applied to the battery 93.

[0061] Furthermore, in this embodiment, the cover 35 is prevented from rotating from the closed position to the open position by the lock member 353. This makes it possible to reduce the possibility of the cover 35 causing the battery 93 to fall when the magnetic drilling machine 1A is in a position in which the tip of the spindle 45 faces in the opposite direction to the direction of gravity (hereinafter referred to as the upward position).

[0062] The cover 35 does not necessarily have to completely cover the opening 340 as in this embodiment. Specifically, the cover 35 only needs to be configured so that when placed in the closed position, it overlaps at least the entire terminal portion 347, preferably the entire battery mounting portion 33 (the entire battery 93 attached to the battery mounting portion 33) when viewed from above. Since the magnetic drilling machine 1A is relatively often used in a position in which the tip of the spindle 45 faces the direction of gravity (hereinafter referred to as the downward position), this configuration at least reduces the possibility that cutting chips will fall from the upper side of the cover 35 toward the terminal portion 347.

[0063] Also, for example, the cover 35 may be supported by the main body 3 so as to be slidable between a closed position and an open position. Alternatively, the cover 35 may be removable from the main body 3 (completely separable from the main body 3).

[0064] Furthermore, the battery attachment portion 33 does not necessarily have to have the storage recess 34, and may have only the rail 341, the lock recess 344, and the terminal portion 347. In this case, since the exposed portion of the battery 93 becomes large, it is preferable that the cover 35 is configured to substantially cover the entire exposed portion of the battery 93.

[0065] In addition, the magnetic drilling machine 1A of this embodiment only needs to be able to selectively apply magnetic force to the workpiece 99, so that the workpiece 99 is attracted to and fixed on the contact surface 211, and there are no particular limitations on the type of magnet 20 used and / or the method of switching the strength of the magnetic force.

[0066] For example, the magnet 20 may be an electromagnet, and the controller 49 may control the energization and de-energization of the electromagnet to switch between a fixed state and an unfixed state. The controller 49 may also control the strength of the magnetic force acting on the workpiece 99. When an electromagnet is used, the manual operation member 25 may be an information input device (e.g., a push button switch, a touch screen, etc.) electrically connected to the controller 49. The above-mentioned manual operation member 25 may also be provided on the magnetic base 2, rather than on the main body 3.

[0067] The correspondence between each component (feature) of the present embodiment and each component (feature) of the present disclosure or invention is shown below. However, each component of the embodiment is merely an example and does not limit each component of the present disclosure or invention.

[0068] The magnetic drilling machine 1A is an example of a "magnetic drilling machine." The magnetic base 2 is an example of a "magnetic base." The main body 3 is an example of a "main body." The drill unit 4 and the spindle 45 are examples of a "drill unit" and a "spindle," respectively. The battery mounting unit 33 and the battery 93 are examples of a "battery mounting unit" and a "battery," respectively. The rail 341 and the terminal unit 347 are examples of a "rail" and a "terminal unit," respectively. The closed position and the open position of the cover 35 are examples of a "first position" and a "second position," respectively. The storage recess 34 and the opening 340 are examples of a "recess" and an "opening," respectively. The locking member 353 is an example of a "locking member." The battery mounting unit 33 is an example of a "battery storage unit." The rail 30 is an example of a "guide unit." The rack 44 is an example of a "guided unit."

[0069] <Second embodiment> Hereinafter, a magnetic drilling machine 1B according to a second embodiment of the present disclosure will be described with reference to FIGS.

[0070] 8, the magnetic drilling machine 1B of the second embodiment differs from the magnetic drilling machine 1A of the first embodiment in that it includes an exhaust nozzle 7, but other configurations are substantially the same as the magnetic drilling machine 1A. Therefore, in the following description, the same configurations as the first embodiment will not be described.

[0071] As shown in FIGS. 8 and 9, the exhaust nozzle 7 of this embodiment includes a hose 71, a connector 73 connected to one end of the hose 71, and a nozzle portion 75 connected to the other end of the hose 71.

[0072] The hose 71 is a tubular member having at least partial flexibility. In this embodiment, a so-called flexible joint hose is adopted for the hose 71. The flexible joint hose is a well-known hose composed of a plurality of synthetic resin parts connected to each other via spherical surfaces. The flexible joint hose can freely change its overall shape by changing the angle between adjacent parts, and can also maintain a curved shape. In addition, the parts may be connected in a detachable manner.

[0073] The connector 73 is configured to detachably engage with the exhaust port 432 (see FIG. 8) of the housing 40 of the drill unit 4. More specifically, the connector 73 includes a cylindrical portion 731 having an internal space communicating with a flow path in the hose 71, and two locking pieces 735 protruding from the cylindrical portion. An end 732 of the cylindrical portion 731 opposite to the end connected to the hose 71 is formed in a flat cylindrical shape that matches the exhaust port 432. The locking pieces 735 protrude in the axial direction of the cylindrical portion 731 from two ends in the longitudinal direction of the end 732. The locking pieces 735 can bend in a direction approaching and a direction separating from each other (the longitudinal direction of the end 732). A protrusion (claw) 736 protruding in a direction separating from each other is provided at the tip of each of the locking pieces 735.

[0074] As shown in FIG. 10, the locking piece 735 is inserted into the exhaust port 432, and the protrusion 736 is engaged with the inner surface of the housing 40 at positions adjacent to both longitudinal ends of the exhaust port 432, thereby attaching and retaining the connector 73, and ultimately the exhaust nozzle 7, to the housing 40.

[0075] Nozzle portion 75 is a cylindrical member having an internal space communicating with the flow path inside hose 71, and a discharge port 751 for discharging air guided from exhaust port 432. Nozzle portion 75 has a tapered shape so that air can be easily sprayed at a specific position.

[0076] In this embodiment, the connector 73 is connected to one of the parts of the hose 71 via a spherical surface, similar to the connection between the parts of the hose 71 (flexible joint hose). Therefore, the user can freely change the orientation of the connector 73 relative to the hose 71. The connector 73 is also removably connected to the hose 71. Therefore, by replacing the connector 73, the user can use the exhaust nozzle 7 not only for the magnetic drilling machine 1B, but also for magnetic drilling machines having exhaust ports with different shapes. The nozzle part 75 is also configured to be replaceable like the connector 73.

[0077] As described in the first embodiment, the magnetic drilling machine 1B can also supply cutting fluid from a container to the tool tip 91 through a flow path inside the spindle 45. However, the supply of cutting fluid from the container can be performed appropriately only when the magnetic drilling machine 1B is in a downward position or in a position close to the downward position. In contrast, the exhaust nozzle 7 can effectively cool the tool tip 91 by using the air flowing out from the exhaust port 432 regardless of the position of the magnetic drilling machine 1B.

[0078] In addition, the exhaust nozzle 7 can be removed from the exhaust port 432, for example, when cutting fluid supplied from a container can be used or when the magnetic drilling machine is not used (for example, during transportation or storage). In addition, the exhaust nozzle 7 can be selectively connected to one of the multiple exhaust ports 432 of the magnetic drilling machine 1B. Therefore, for example, when there is an obstacle (for example, a wall) adjacent to the magnetic drilling machine 1B, the user can attach the exhaust nozzle 7 to an exhaust port 432 that is located in a position that does not interfere with the obstacle and use it. Note that the manner of connecting the exhaust nozzle 7 to the exhaust port 432 is not limited to the above example, and may be changed to, for example, a screw-in or engagement using a bayonet structure.

[0079] In addition, in this embodiment, since a flexible joint hose is used for the hose 71, the exhaust nozzle 7 has the advantage of being able to stably guide air to a desired position. However, instead of a flexible joint hose, a general flexible hose made of metal or synthetic resin may be used for the hose 71. In this case, it is also preferable that the flexible hose be able to retain its shape.

[0080] In the case where the hose 71 cannot maintain its shape, a nozzle holder may be provided at the lower end of the spindle accommodating portion 41. The nozzle holder is configured, for example, to be detachably connected to the nozzle portion 75 or the hose 71 and to hold the nozzle portion 75 or the hose 71 at an appropriate position. The nozzle holder may be detachable from the spindle accommodating portion 41. Also, the holding position of the nozzle portion 75 or the hose 71 in the circumferential direction around the rotation axis R1 may be changeable.

[0081] In this embodiment, an example in which the exhaust nozzle 7 is attached to one exhaust port 432 has been described, but the exhaust nozzle 7 may be configured to cover a plurality of exhaust ports and to be connected to at least one of the plurality of exhaust ports. In this case, the tool tip 91 can be cooled by using air flowing into the exhaust nozzle from the plurality of exhaust ports. Moreover, the positions and numbers of the intake port 431 and the exhaust port 432 in this embodiment are merely examples and may be changed as appropriate.

[0082] The magnetic drilling machine 1B of this embodiment may be modified in the same manner as described in the first embodiment. Moreover, the cover 35 may be omitted from the magnetic drilling machine 1B. [Explanation of symbols]

[0083] 1A, 1B: magnetic drill press, 2: magnetic base, 20: magnet, 21: holder, 211: contact surface, 25: manual operation member, 3: main body, 30: rail, 32: handle, 321: pinion, 33: battery mounting portion, 34: storage recess, 340: opening, 341: rail, 344: lock recess, 347: terminal portion, 348: terminal, 349: support member, 35: cover, 353: lock member, 4: drill unit, 40: housing, 41: spindle storage portion, 42: motor storage portion, 421: upper wall portion, 422: front wall portion, 423: side wall portion, 4 24: rear wall portion, 431: intake port, 432: exhaust port, 44: rack, 45: spindle, 450: tool attachment portion, 455: insertion hole, 47: motor, 471: output shaft, 48: fan, 49: controller, 7: exhaust nozzle, 71: hose, 73: connector, 731: cylindrical portion, 732: end portion, 735: locking piece, 736: protrusion, 75: nozzle portion, 751: discharge port, 91: tip tool, 911: through hole, 92: pilot pin, 93: battery, 930: case, 931: groove, 934: locking member, 937: terminal portion, 99: processing material

Claims

1. A magnetic drilling machine, a magnetic base configured to be selectively secured to a workpiece by magnetic force; a main body coupled to the magnetic base; A drill unit including a spindle configured to removably hold a tool bit, the drill unit being supported on the body portion so as to be movable in a direction parallel to a rotation axis of the spindle; a battery mount configured to removably hold a battery for powering the magnetic drilling machine; a cover configured to at least partially cover the battery mounting portion; The battery mounting portion includes: a rail extending linearly in a first direction and configured to slidably engage a groove of the battery as the battery is moved relative to the rail from a first side toward a second side in the first direction; a terminal portion having a terminal configured to electrically connect to a terminal of the battery in response to the battery being placed in a predetermined position on the battery attachment portion; A magnetic drilling machine characterized in that the cover is displaceable relative to the main body portion and is configured so that when the cover is in a first position, it overlaps the entire terminal portion when viewed from the first side in the first direction.

2. 2. The magnetic drilling machine of claim 1, The magnetic drilling machine is characterized in that the cover is configured to substantially cover the entire portion of the battery attached to the battery mounting portion that is exposed from the battery mounting portion when the cover is in the first position.

3. The magnetic drilling machine according to claim 1 or 2, the battery mounting portion includes a recess configured to receive at least a portion of the battery; the recess has an opening on the first side in the first direction, The magnetic drilling machine, wherein the cover is configured to substantially cover the opening of the recess when the cover is in the first position.

4. The magnetic drilling machine of claim 3, The recess is configured to accommodate at least half of the battery.

5. The magnetic drilling machine according to any one of claims 1 to 4, The magnetic drilling machine further comprising a locking member configured to lock the cover relative to the body in the first position.

6. The magnetic drilling machine according to any one of claims 1 to 5, the cover is coupled to the body portion so as to be pivotable between the first position and the second position; The magnetic drilling machine according to claim 1, wherein the cover is configured to permit installation and removal of the battery when the cover is in the second position.

7. The magnetic drilling machine according to any one of claims 1 to 6, The magnetic drilling machine according to claim 1, wherein the first direction is parallel to the axis of rotation of the spindle.

8. a magnetic base configured to be selectively secured to a workpiece by magnetic force; a battery storage section connected to an upper side of the magnetic base and having an opening at an upper portion; A guide portion connected to the battery housing portion; A guided portion that is guided in the up and down direction by the guide portion; a motor connected to the guided portion and rotated by power supplied from a battery storage portion; a drill unit including a spindle rotated by the motor; and a cover configured to cover the opening.

9. A magnetic drilling machine, a magnetic base configured to be selectively secured to a workpiece by magnetic force; a main body coupled to the magnetic base; a drill unit supported on the body portion so as to be movable in a first direction, The drill unit includes: A motor; a spindle configured to removably hold a tool bit and configured to be rotated by the motor about a rotation axis extending in the first direction; a fan configured to be rotated by the motor; a housing containing the motor, the spindle, and the fan, the housing having at least one intake port and at least one exhaust port; 11. A magnetic drilling machine comprising: an exhaust nozzle including an at least partially flexible tubular portion and coupled to the at least one exhaust port.

10. 10. The magnetic drilling machine according to claim 9, The magnetic drilling machine according to claim 1, wherein the exhaust nozzle is removably coupled to the at least one exhaust port.

11. The magnetic drilling machine according to claim 10, the at least one exhaust port includes a plurality of exhaust ports arranged at different positions from each other in a circumferential direction around the rotation axis of the spindle, The magnetic drilling machine, wherein the exhaust nozzle is selectively connectable to one of the plurality of exhaust ports.

12. The magnetic drilling machine according to claim 10 or 11, The magnetic drilling machine, wherein the exhaust nozzle is configured to be connectable to the at least one exhaust port without the use of a separate auxiliary device.

13. The magnetic drilling machine according to any one of claims 10 to 12, the exhaust nozzle comprises a connector configured to be removably coupled to the at least one exhaust port and a nozzle portion having an outlet; A magnetic drilling machine, characterized in that at least one of the connector and the nozzle portion is removably connected to the tubular portion.

14. The magnetic drilling machine according to any one of claims 9 to 13, The magnetic drilling machine, wherein the tubular portion is configured to retain its shape when curved.

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