Portable woodworking cutter

Abstract

To solve the problem that, regarding a rechargeable router that can be fitted with a battery and has a battery mounting portion at an upper part of a main body and grip portions to be gripped by a user at left and right side portions of the main body, the battery being moved in a left and right direction to be attached and removed, the center of gravity of the main body is displaced when replacing small and large batteries having different capacities with one another to be installed, which causes a poor weight balance of the router and impaired operability during movement operation, and to maintain good operability even when multiple types of batteries are replaced and installed.SOLUTION: A battery mounting portion 21 holds a single battery 3 in a posture that a longitudinal direction L3 of the battery 3 forms an angle of 70 to 90 degrees to a virtual plane K including left and right support members 11, 12. As a result, even when the capacity of the battery 3 changes, the center of gravity position of a main body 20 does not change significantly in a left-right direction, so that weight balance is maintained and good operability is maintained.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a portable woodworking cutting machine to which a battery can be attached.

Background Art

[0002] For example, in a portable woodworking cutting machine called a rechargeable router, a plunger type is known in which a tool body is supported so as to be movable in a direction approaching and separating from a workpiece with respect to a base that abuts against the workpiece. The plunger type portable woodworking cutting machine is disclosed in, for example, Patent Documents 1 and 2. Patent Document 1 discloses a plunger type portable woodworking cutting machine to which two batteries can be attached as a power source. Patent Document 2 discloses a plunger type portable woodworking cutting machine in which one battery is moved in the left - right direction for attachment and removal.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] When it is possible to replace and attach batteries with different capacities (sizes, weights), for example, there is a problem that a large - capacity battery tends to protrude in the left - right direction and interfere with gripping the grip portion. Also, there is a problem that the center - of - gravity position changes when a large - capacity battery is attached, impairing the operability during work. In the present disclosure, good operability is ensured regardless of the size of the battery.

Means for Solving the Problems

[0005] According to one aspect of the present disclosure, a portable woodworking cutting machine includes left and right support members that extend vertically and are parallel to each other, and a main body portion that is supported by the support members so as to be vertically movable at a position between the support members, is biased upward by the biasing force of a compression spring disposed inside the support members, and has a cutting tool attached thereto. The portable woodworking cutting machine has a battery attachment portion to which one battery is removably attached above the main body portion. The battery attachment portion holds one battery in a posture in which the longitudinal direction of the battery forms an angle of 70 to 90 degrees with respect to a virtual plane including the support members.

[0006] Therefore, the battery attached to the battery attachment portion is held within a compact region in the left-right direction. As a result, the portable woodworking cutting machine can be made more compact. The inclination of the holding posture of the battery with respect to the virtual plane includes inclination in any direction including up-down and left-right.

[0007] According to another aspect of the present disclosure, a portable woodworking cutting machine includes left and right support members that extend vertically and are parallel to each other, and a main body portion that is supported by the support members so as to be vertically movable at a position between the support members, is biased upward by the biasing force of a compression spring disposed inside the support members, and has a cutting tool attached thereto. The portable woodworking cutting machine has a gripping portion provided on both the left and right sides of the main body portion, and a battery attachment portion to which one battery is removably attached above the main body portion. The battery attachment portion holds one battery in a posture in which the longitudinal direction of the battery has an angle with respect to a virtual plane including the support members.

[0008] Therefore, the battery attached to the battery attachment portion is held within a compact region in the left-right direction. As a result, it is less likely to interfere with the user gripping the gripping portion, thereby improving the operability of the portable woodworking cutting machine. The inclination of the holding posture of the battery with respect to the virtual plane includes inclination in any direction including up-down and left-right.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0010] In one or more embodiments, the battery attachment portion holds the battery in a posture having an angle of 50 degrees or more in the longitudinal direction with respect to the virtual plane. Therefore, the battery is held in a more compact region in the left - right direction compared to the posture in which the longitudinal direction is along the virtual plane.

[0011] In one or more embodiments, the battery mounting portion holds the battery in a posture having an angle of 70 degrees or more in the longitudinal direction with respect to the virtual plane. Therefore, the battery is held in a more compact region in the left - right direction compared to the posture where the longitudinal direction is along the virtual plane.

[0012] In one or more embodiments, the battery mounting portion holds the battery in a posture having an angle of approximately 90 degrees in the longitudinal direction with respect to the virtual plane. Therefore, the battery is held in the most compact region in the left - right direction.

[0013] In one or more embodiments, the battery mounting portion has an inlet for receiving the battery on the user side and a stopper for restricting the movement of the battery moved in a direction away from the user from the inlet. Therefore, the battery is moved in a direction away from the user and attached to the battery mounting portion, and is moved in a direction approaching the user and removed from the battery mounting portion. Thereby, good detachability of the battery is ensured.

[0014] In one or more embodiments, when a plurality of types of batteries having different sizes or weights are exchanged and mounted on the battery mounting portion, the center - of - gravity position of the portable woodworking cutting machine is maintained at a fixed position in the left - right direction. Therefore, stable operability during the movement operation of the portable woodworking cutting machine is ensured when a plurality of types of batteries are exchanged and mounted.

[0015] In one or more embodiments, when a plurality of types of batteries having different weights are exchanged and mounted on the battery mounting portion, the heavier battery is held by the battery mounting portion so as to displace the center - of - gravity position of the battery toward the user side. Therefore, in normal cutting work, since the portable woodworking cutting machine is pushed in a direction away from the user to advance the cutting work, when a heavier battery is mounted, the portable woodworking cutting machine is less likely to fall toward the user side.

[0016] In one or more embodiments, when a battery is attached to the battery attachment portion, the center of gravity position of the main body portion including the battery is located on the virtual plane. Therefore, the lifting and lowering operation of the main body portion is made smooth.

[0017] In one or more embodiments, the main body portion includes a controller that houses a control board including an electric motor that rotates a cutting tool and a control circuit that controls the operation of the electric motor. The controller is arranged in a posture intersecting the motor axis above the electric motor. Therefore, the controller is arranged compactly in the vertical direction.

[0018] In one or more embodiments, the portable woodworking cutting machine includes an operating member of an upper dead point adjustment mechanism that restricts the upward movement range of the main body portion on the upper portion of the support member. At the maximum lowering end position of the downward movement range of the main body portion, the battery attached to the battery attachment portion is positioned in a region overlapping the operating member in the vertical direction. Therefore, the main body portion can be lowered to a height at which the battery is positioned laterally of the operating member. As a result, a deeper cutting depth of the cutting tool with respect to the workpiece can be realized without increasing the size of the portable woodworking cutting machine.

[0019] In one or more embodiments, the main body portion has an air intake for cooling the electric motor on the side opposite to the operating member in the left-right direction. Therefore, outside air is smoothly sucked into the air intake without being affected by the resistance of the operating member. As a result, the cooling efficiency of the electric motor is enhanced.

[0020] In one or more embodiments, the battery attachment portion has a housing having a left and right half-split structure that are butted against each other and coupled. Therefore, the convenience of the assembly work of the battery attachment portion is achieved.

[0021] In one or more embodiments, the portable woodworking cutting machine has a base that abuts against the material to be cut. The main body is inseparably provided from the base. Therefore, the above-described respective means are applicable only to a plunge-type portable woodworking cutting machine in which the main body is vertically movable via left and right support portions. The portable woodworking cutting machine is a plunge-type dedicated cutting machine that cannot replace the main body from the base and attach it to a fixed-type base that does not have a support member for vertical movement.

Example

[0022] As shown in FIGS. 1 to 3, in an embodiment of the present disclosure, as an example of the portable woodworking cutting machine 1, a so-called plunge-type router is exemplified. The portable woodworking cutting machine 1 has a base 10 that abuts against the material to be cut W, and a main body 20 that is vertically movably supported by the base 10. The main body 20 is moved downward so that the cutting tool 2 cuts into the material to be cut W. By moving the portable woodworking cutting machine 1 in the surface direction of the material to be cut W with the main body 20 moved downward, the cutting tool 2 cuts into the material to be cut W in the surface direction.

[0023] The base 10 has an annular shape with a circular work hole 10a at the center. The cutting tool 2 cuts into the material to be cut W on the inner peripheral side of the work hole 10a. A pair of left and right support members 11 and 12 are supported on the upper surface of the base 10. The left and right support members 11 and 12 have a sleeve shape. The left and right support members 11 and 12 are fixed to the left and right sides of the work hole 10a. The left and right support members 11 and 12 extend upward from the upper surface of the base 10 in parallel with each other. The main body 20 is vertically movably supported via the left and right support members 11 and 12.

[0024] The main body 20 has a battery attachment portion 21 at the upper part where one battery 3 can be attached. Gripping portions 22 and 23 are provided on both the left and right sides of the main body 20. The user of this portable woodworking cutting machine 1 is located on the front side of the main body 20, grips the left gripping portion 22 with the left hand, and grips the right gripping portion 23 with the right hand to move and operate the portable woodworking cutting machine 1. By the user moving the portable woodworking cutting machine 1 forward, backward, left, and right, the cutting tool 2 cuts into the material to be cut W and cutting is performed.

[0025] As shown in FIG. 2, the battery mounting portion 21 has a pedestal housing 24. The pedestal housing 24 has a left and right split structure in which a left pedestal housing 24a and a right pedestal housing 24b are butted against each other and joined. The front portion of the pedestal housing 24 has a receiving port 21a for receiving the battery 3. At both left and right ends of the receiving port 21a, two stoppers 21b for restricting the movement of the battery 3 in the rearward direction (the direction away from the user) are provided. Inside each of the left and right stoppers 21b, two elastic bodies 21c (rubber pins) for suppressing the rattling of the mounted battery 3 are provided.

[0026] A pair of left and right rails 21d are provided on the pedestal housing 24. The left and right rails 21d extend parallel to each other rearward from the left and right side portions of the receiving port 21a. A terminal plate 27 to which the battery 3 is electrically connected is provided between the left and right rails 21d. The terminal plate 27 is provided with a positive connection terminal 27a and a negative connection terminal 27b. The terminal plate 27 is sandwiched between the left pedestal housing 24a and the right pedestal housing 24b and assembled to the battery mounting portion 21.

[0027] As shown in FIG. 1, the battery 3 has a generally hexahedral shape (rectangular parallelepiped) with a length L3, a width S3, and a height H3. The battery 3 is mounted on the battery mounting portion 21 with the length L3 direction (longitudinal direction L3) aligned with the front-rear direction. The battery 3 is mounted on the battery mounting portion 21 by moving it rearward (the direction away from the user) from the receiving port 21a with its front portion facing the user side (front). The battery 3 is removed from the battery mounting portion 21 by moving it forward (the direction approaching the user).

[0028] As shown in FIG. 6, a pair of left and right rail receiving portions 3a are provided on the lower surface of the battery 3. By engaging the left and right rail receiving portions 3a with the rails 21d, the battery 3 is slidably supported in the front-rear direction (removing direction, mounting direction) with respect to the battery mounting portion 21.

[0029] A positive terminal receiving portion 3b and a negative terminal receiving portion 3c are provided between the left and right rail receiving portions 3a. When the battery 3 is attached to the battery attachment portion 21, the positive connection terminal 27a is connected to the positive terminal receiving portion 3b, and the negative connection terminal 27b is connected to the negative terminal receiving portion 3c. Thereby, the battery 3 is electrically connected to the battery attachment portion 21.

[0030] A stepped portion 3d that protrudes downward in a mountain shape is provided on the front side of the battery 3. A locking claw 3e is provided behind the stepped portion 3d. The locking claw 3e is spring-biased in a direction protruding downward (locking side). An unlock button 3f is provided on the front surface of the stepped portion 3d. The unlock button 3f is linked to the locking claw 3e. When the user pushes up the unlock button 3f with a fingertip, the locking claw 3e is retracted upward against the spring bias.

[0031] A locking recess 21e is provided in the stopper 21b of the battery attachment portion 21. When the battery 3 is attached to the battery attachment portion 21, the rear portions of both the left and right ends of the stepped portion 3d abut against the left and right two stoppers 21b, respectively. Thereby, the movement of the battery 3 in the rearward (attachment direction) is restricted. When the battery 3 is attached to the battery attachment portion 21, the locking claw 3e fits into the locking recess 21e. Thereby, the movement of the battery 3 in the forward (removal direction) is restricted.

[0032] Elastic bodies 21c are arranged on both the left and right sides of the locking recess 21e. When the battery 3 is attached to the battery attachment portion 21, the elastic bodies 21c abut against the stepped portion 3d. Thereby, the rattling of the battery 3 is suppressed.

[0033] As shown in FIGS. 3, 7, and 8, the battery 3 is held by the battery attachment portion 21 in a posture (orthogonal posture) in which the longitudinal direction L3 is at an angle of 90 degrees in plan view and approximately 90 degrees in side view with respect to the virtual plane K including the left and right support members 11 and 12. Thereby, the battery 3 is held in a region that does not protrude between the left and right support members 11 and 12 and is the most compact region in the left-right direction.

[0034] Instead of the small battery 3 with a relatively small capacity (small-sized battery 3), a large battery 4 with a relatively large capacity (large-sized battery 4) can be attached to the battery attachment portion 21. The large battery 4 is enlarged by accommodating more cells than the small battery 3. Therefore, the large battery 4 is heavier than the small battery 3. Figures 1, 3, 4, 5, 7, and 8 show the state where the small battery 3 is attached. Figures 9 and 10 show the state where the large battery 4 is attached.

[0035] As shown in Figure 6, the length L4 of the large battery 4 is longer than the length L3 of the small battery 3 (L3 < L4). The height H4 of the large battery 4 is higher than the height H3 of the small battery 3 (H3 < H4). The width S3 of the small battery 3 and the width S4 of the large battery 4 are the same.

[0036] The small battery 3 and the large battery 4 have compatibility such that they can be attached to the common battery attachment portion 21. Therefore, the positional relationship among the left and right rail receiving portions 3a, the positive terminal receiving portion 3b, and the negative terminal receiving portion 3c with respect to the locking claw 3e of the small battery 3 shown in the upper part of Figure 6 is the same as the positional relationship among the left and right rail receiving portions 4a, the positive terminal receiving portion 4b, and the negative terminal receiving portion 4c with respect to the locking claw 4e of the large battery 4 shown in the lower part of Figure 6.

[0037] When the large battery 4 is attached to the battery attachment portion 21, the positive connection terminal 27a is connected to the positive terminal receiving portion 4b, and the negative connection terminal 27b is connected to the negative terminal receiving portion 4c. Thereby, the large battery 4 is electrically connected to the battery attachment portion 21.

[0038] On the front side of the large battery 4, a stepped portion 4d that protrudes downward in a chevron shape is provided. The stepped portion 4d is provided at a position spaced farther forward than the small battery 3 with respect to the locking claw 4e. The locking claw 4e is spring-biased in the downward protruding direction (locking side). An unlock button 4f is provided on the front surface of the stepped portion 4d. The unlock button 4f is linked to the locking claw 4e. When the user pushes up the unlock button 4f with a fingertip in an upward direction, the locking claw 4e is retracted upward against the spring bias.

[0039] A locking recess 21e is provided between the left and right stoppers 21b of the battery mounting portion 21. When the large battery 4 is attached to the battery mounting portion 21, the left and right rear portions of the stepped portion 4d come into contact with the left and right stoppers 21b respectively. Thereby, the movement of the large battery 4 in the rearward (attachment direction) is restricted. When the large battery 4 is attached to the battery mounting portion 21, the locking claw 4e fits into the locking recess 21e. Thereby, the movement of the large battery 4 in the forward (removal direction) is restricted. When the large battery 4 is attached to the battery mounting portion 21, an elastic body 21c is brought into contact with the stepped portion 4d. Thereby, rattling in the attached state of the large battery 4 is suppressed.

[0040] As shown in FIG. 6, the length L0 from the rear end to the locking claw 3e of the small battery 3 is the same as the length L0 from the rear end to the locking claw 4e of the large battery 4. The length L2 from the front end to the locking claw 4e of the large battery 4 is larger than the length L1 from the front end to the locking claw 3e of the small battery 3. Therefore, in the large battery 4, the length from the locking claw 4e to the front end is longer than that of the small battery 3 by (L2 - L1). This difference in length (L2 - L1) corresponds to the difference (L4 - L3) between the length L4 of the large battery 4 and the length L3 of the small battery 3.

[0041] The stepped portion 4d of the large battery 4 is longer in the longitudinal direction by the length difference (L2 - L1) than the stepped portion 3d of the small battery 3. Therefore, when the large battery 4 is attached to the battery attachment portion 21 as shown in FIG. 10, the large battery 4 is held in a posture protruding toward the user side by the length difference (L2 - L1). For this reason, the position of the center of gravity G4 of the main body portion 20 with the large battery 4 attached in the front-rear direction is displaced, for example, about 7 millimeters forward (toward the user side) with respect to the position of the center of gravity G3 of the main body portion 20 with the small battery 3 attached as shown in FIG. 8.

[0042] During the cutting operation, the user applies a backward pushing force F to the main body portion 20 for the moving operation. Therefore, when the large battery 4 is attached to the battery attachment portion 21, the position of the center of gravity G4 is displaced toward the user side (front) compared to the case where the small battery 3 is attached, making it less likely for the portable woodworking cutting machine 1 to fall backward (in the pushing direction) during the moving operation.

[0043] As shown in FIGS. 8 and 10, the positions of the centers of gravity G3 and G4 in the front-rear direction are both within the range of the diameters (thicknesses) of the support members 11 and 12, whether the small battery 3 is attached or the large battery 4 is attached. As a result, smooth lifting and lowering operations of the main body portion 20 are realized in both cases of attaching the small battery 3 and the large battery 4.

[0044] The width S3 of the small battery 3 and the width S4 of the large battery 4 are the same (S3 = S4). Therefore, as shown in Fig. 7, the position of the center of gravity G3 of the main body 20 with the small battery 3 attached in the left-right direction is approximately the same as the position of the center of gravity G4 of the main body 20 with the large battery 4 attached as shown in Fig. 9. For this reason, both the center of gravity G3 and the center of gravity G4 are located approximately at the center in the left-right direction of the main body 20. When batteries 3 and 4 of different sizes are exchanged and attached, since the positions of the centers of gravity G3 and G4 of the main body 20 in the left-right direction hardly change, the left-right weight balance of the main body 20 is maintained. Thereby, good operability of the lifting and lowering operation of the main body 20 is ensured. Also, since the positions of the centers of gravity G3 and G4 in the left-right direction do not change, the operability of the moving operation during cutting does not change significantly, and good operability is ensured in this regard.

[0045] The height H4 of the large battery 4 is higher than the height H3 of the small battery 3 (H3 < H4). Therefore, as shown in Fig. 7, the position of the center of gravity G3 of the main body 20 with the small battery 3 attached in the height direction is, for example, about 35 millimeters higher than the position of the center of gravity G4 of the main body 20 with the large battery 4 attached as shown in Fig. 9.

[0046] The main body 20 has a main body housing 30. The main body housing 30 has an upper housing 31 made of resin and a lower housing 32 made of metal. The lower housing 32 is coupled to the lower side of the upper housing 31. A pedestal housing 24 of the battery attachment portion 21 is coupled to the upper portion of the upper housing 31. The upper portion of the upper housing 31 is sandwiched from the left and right by a left pedestal housing 24a and a right pedestal housing 24b, whereby the pedestal housing 24 is coupled to the upper portion of the upper housing 31. By making the pedestal housing 24 have a left-right split structure, the convenience of the assembly work of the battery attachment portion 21 to the main body housing 30 is achieved.

[0047] The upper housing 31 is internally provided with an electric motor 40. The motor shaft 41 of the electric motor 40 is rotatably supported via a bearing 33 provided on the upper housing 31 and a bearing 34 provided on the lower housing 32. A cooling fan 42 is attached to the motor shaft 41 below the electric motor 40.

[0048] An air inlet 25 is provided on the right side of the pedestal housing 24 of the battery attachment portion 21. When the cooling fan 42 rotates due to the activation of the electric motor 40, outside air is introduced into the pedestal housing 24 and the main body housing 30 from the air inlet 25. The introduced outside air flows downward. Thereby, the electric motor 40 is cooled. The cooling fan 42 is housed in the lower housing 32. The introduced outside air is exhausted from an exhaust port 32f (see FIGS. 7 and 9) provided on the lower surface of the lower housing 32.

[0049] A rectangular flat plate-shaped controller 28 is internally provided in the pedestal housing 24. The controller 28 has a control board mainly including a control circuit for controlling the operation of the electric motor 40. The controller 28 is cooled by the outside air introduced into the pedestal housing 24 from the air inlet 25. The controller 28 is disposed above the electric motor 40. The controller 28 is disposed in a posture such that its plane direction is substantially orthogonal to the motor axis J. Thereby, the controller 28 is compactly housed in the vertical direction.

[0050] The lower part of the motor shaft 41 protrudes downward from the lower housing 32. A chuck 43 is provided on the lower part of the motor shaft 41. A rod-shaped tool 2 is coaxially attached to the lower part of the motor shaft 41 via the chuck 43.

[0051] Long support cylinder parts 31a and 31b extending vertically are provided on the left and right sides of the upper housing 31. Long support cylinder parts 32a and 32b extending vertically are provided on the left and right sides of the lower housing 32. The left support cylinder part 31a and the support cylinder part 32a are coaxially arranged with each other. The right support cylinder part 31b and the support cylinder part 32b are coaxially arranged with each other. The right support cylinder part 31b and the support cylinder part 32b are further covered with an auxiliary housing 35.

[0052] The lower parts of the left and right support members 11 and 12 are respectively inserted into the coupling cylinder part 10b provided on the upper surface of the base 10 in a non-detachable manner. In the state where the main body part 20 is located at the top dead center as shown in FIG. 4, the upper sides of the left and right support members 11 and 12 respectively enter into the lower support cylinder parts 32a and 32b. When the main body part 20 is moved downward, the left and right support members 11 and 12 relatively enter into the upper support cylinder parts 31a and 31b respectively.

[0053] As shown in FIG. 5, the main body part 20 is supported so as to be movable downward to the maximum descent end position where the lower part of the lower support cylinder parts 32a and 32b abuts against the coupling cylinder part 10b on the base 10 side. In the state where the main body part 20 is located at the maximum descent end position, the upper parts of the left and right support members 11 and 12 are in a state of approaching the upper parts of the upper support cylinder parts 31a and 31b respectively. In the normal use state, the main body part 20 is moved up and down above the maximum descent end position by a bottom dead center stopper 50 described later. The bottom dead center of the main body part 20 is defined by the bottom dead center stopper 50.

[0054] An upper dead center adjustment mechanism 13 for adjusting the position of the upper dead center of the main body part 20 is provided on the upper part of the left support member 11. The upper dead center adjustment mechanism 13 has a vertically long rod-shaped auxiliary member 36. One auxiliary member 36 is arranged on the inner peripheral side of the upper and lower support cylinder parts 31a and 32a. The lower end part of the auxiliary member 36 is coupled to the base 10. The upper part of the auxiliary member 36 protrudes upward from the support cylinder part 31a. A male screw part 36a is provided at the protruding part. A lock nut 36b is screwed onto the male screw part 36a as an operating member. The male screw part 36a is made of steel, and the lock nut 36b is made of synthetic resin.

[0055] When the upper surface of the left support cylinder portion 31a abuts against the lock nut 36b, the top dead center of the main body portion 20 is positioned. By changing the screwing position of the lock nut 36b with respect to the male screw portion 36, the top dead center of the main body portion 20 can be vertically adjusted. A cap 36c is provided above the lock nut 36b. The cap 36c is integrally formed with the auxiliary member 36 by press-fitting, and is prevented from coming off even when the lock nut 36b loosens and moves upward. The root of the thread of the lock nut 36b is shallower than the normal thread. This shallower portion allows the tip of the thread of the male screw portion 36a to bite in when screwing with the male screw portion 36a, and elastically holds the lock nut 36b. Due to this elastic holding action, the lock nut 36b is prevented from loosening.

[0056] An auxiliary sleeve 36d is coupled to the upper portion of the support cylinder portion 31a. The auxiliary sleeve 36d extends downward. The auxiliary sleeve 36d extends in the range from the upper support cylinder portion 31a to the lower support cylinder portion 32a. The auxiliary member 36 is inserted through the inner peripheral side of the auxiliary sleeve 36d so as to be relatively displaceable vertically.

[0057] One compression spring 37 is disposed on the outer peripheral sides of the auxiliary member 36 and the auxiliary sleeve 36d. The lower portion of the compression spring 37 abuts against the upper surface of the base 10 (the upper surface of the coupling cylinder portion 10b) via the inner peripheral side of the support member 11. The upper portion of the compression spring 37 abuts against the upper portion of the support cylinder portion 31a.

[0058] One cylindrical linear ball bearing 44 is attached to the inner peripheral side of the right and lower support cylinder portion 32b. The right support member 12 is inserted through the inner peripheral side of the linear ball bearing 44. The right support member 12 is supported via the linear ball bearing 44 so as to be relatively movable vertically with respect to the main body housing 30.

[0059] An auxiliary member 38 is coupled to the upper portion of the support cylinder portion 31b on the right and upper sides. The auxiliary member 38 extends downward from the upper portion of the support cylinder portion 31b. The lower side of the auxiliary member 38 enters the inner peripheral side of the support member 12. A compression spring 39 is disposed along the inner peripheral side of the support member 12 and the outer peripheral side of the auxiliary member 38. The lower portion of the compression spring 39 abuts against the upper surface of the base 10 (the bottom surface of the coupling cylinder portion 10b). The upper portion of the compression spring 39 abuts against the upper surface of the support cylinder portion 31b.

[0060] The main body portion 20 is biased in the upward movement direction by the left and right compression springs 37, 39. The main body portion 20 is operated to move downward against the biasing forces of the compression springs 37, 39.

[0061] A pedestal portion 32c is integrally provided on the support cylinder portion 32a on the left and lower sides. The pedestal portion 32c is provided so as to protrude leftward. The pedestal portion 32c protrudes further leftward from the left side portion of the upper housing 31. A gripping portion 22 is attached to the left side portion of the main body portion 20 via the pedestal portion 32c. The left gripping portion 22 has a grip shape that is easy for the user to grip with the left hand.

[0062] A pedestal portion 32d is integrally provided on the support cylinder portion 32b on the right and lower sides. The pedestal portion 32d is provided so as to protrude rightward. The pedestal portion 32d protrudes further rightward from the right side portion of the auxiliary housing 35. A gripping portion 23 is attached to the right side portion of the main body portion 20 via the pedestal portion 32d. The right gripping portion 23 has a grip shape that is easy for the user to grip with the right hand.

[0063] On the upper part of the right gripping part 23, a standby switch 23a is provided. When the standby switch 23a is pressed, the power supply state of the battery 3 (startup standby state) is entered. When the standby switch 23a is pressed in the startup standby state, it switches to the power-off state. As shown in Fig. 8, a trigger-type startup switch 23b is provided on the rear surface of the right gripping part 23. When the startup switch 23b is pulled in the startup standby state, the electric motor 40 starts. Thereby, the tool 2 rotates. When the pulling operation of the startup switch 23b is released, the electric motor 40 stops and enters the startup standby state.

[0064] On the left side of the right gripping part 23, a lock-on button 23c for holding the pulled operation state of the startup switch 23b is arranged. When the lock-on button 23c is pressed while the startup switch 23b is being pulled, the pulled operation state of the startup switch 23b is locked. Thereby, convenience for continuous cutting operations such as long groove cutting is achieved. When the startup switch 23b is strongly pulled in the lock-on state, the lock-on state is released. Thereby, the pulling operation of the startup switch 23b can be released.

[0065] A speed change dial 26 is provided on the right side of the front surface of the main body part 20. By rotating the speed change dial 26, the electric motor 40 is speed-changed. Thereby, the rotation speed of the tool 2 can be adjusted.

[0066] On the left side of the lower housing 32, a stopper pedestal part 32e is provided. On the stopper pedestal part 32e, a bottom dead center stopper 50 for positioning the bottom dead center of the main body part 20 is provided. The bottom dead center stopper 50 has a stopper screw 51. On the upper part of the stopper screw 51, a grip part 52 to be gripped during rotation operation is provided. The stopper screw 51 penetrates the stopper pedestal part 32e vertically.

[0067] A half nut (not visible in the figure) is embedded in the stopper pedestal portion 32e. The half nut has a female thread portion that can mesh with the stopper screw 51 in the range of approximately half a circumference on the rear side of the inner peripheral hole. The half nut is embedded so that its position can be changed in the radial direction (front-rear direction) of the stopper screw 51. The half nut is spring-biased forward (the meshing side with respect to the stopper screw 51). By pressing the release button 53 provided on the front surface of the stopper pedestal portion 32e backward, the meshing of the half nut with the stopper screw 51 is released. Thereby, the vertical position of the stopper screw 51 can be quickly changed.

[0068] When the pressing operation of the release button 53 is released, the half nut meshes with the stopper screw 51. When the gripping portion 52 is gripped and the stopper screw 51 is rotated in this meshed state, the upward position of the stopper screw 51 can be finely adjusted.

[0069] A stopper receiving portion 55 is provided on the upper surface of the base 10 below the stopper screw 51. The stopper receiving portion 55 has three abutting portions 56, 57, 58 with different heights. The three abutting portions 56, 57, 58 are supported on the upper surface of the circular pedestal portion 59. The three abutting portions 56, 57, 58 are arranged at three equally divided positions on the periphery of the pedestal portion 59. Each of the three abutting portions 56, 57, 58 can be independently adjusted in height.

[0070] By rotating the pedestal portion 59, any one of the three abutting portions 56, 57, 58 can be positioned below the stopper screw 51. By bringing the stopper screw 51 into contact with the abutting portion 56 (or 57, 58), the bottom dead center of the main body portion 20 is positioned. The bottom dead center of the main body portion 20 is appropriately adjusted according to the size of the cutting tool 2 and the cutting depth.

[0071] According to the embodiments described above, the battery mounting portion 21 holds the batteries 3 and 4 in a posture such that the longitudinal directions L3 and L4 of the batteries 3 and 4 are orthogonal to the virtual plane K including the left and right support members 11 and 12. Therefore, the batteries 3 and 4 attached to the battery mounting portion 21 are held within a compact region in the left - right direction. As a result, the woodworking portable cutting machine 1 is made more compact.

[0072] According to the embodiments, since the batteries 3 and 4 attached to the battery mounting portion 21 are held within a compact region in the left - right direction, it is less likely that the batteries 3 and 4 will interfere with the user who is gripping the gripping portions 22 and 23. As a result, the operability of the woodworking portable cutting machine 1 is further enhanced.

[0073] According to the embodiments, the battery mounting portion 21 has an entrance 21a for receiving the batteries 3 and 4 on the user side, and a stopper 21b for restricting the movement of the batteries 3 and 4 that have moved in a direction (rearward) away from the user from the entrance 21a. Therefore, the batteries 3 and 4 are moved rearward away from the user and attached to the battery mounting portion, and are moved forward toward the user and removed from the battery mounting portion 21. As a result, good detachability of the batteries 3 and 4 is ensured.

[0074] According to the embodiments, when two types of batteries 3 and 4 having different sizes or weights are exchanged and attached to the battery mounting portion 21, the center of gravity G3 and G4 of the main body portion 20 of the woodworking portable cutting machine 1 do not change significantly in the left - right direction and are held at generally constant positions in the left - right direction. Therefore, stable operability during the movement operation of the woodworking portable cutting machine 1 is ensured when two types of batteries 3 and 4 are exchanged and attached.

[0075] According to the embodiment, when two types of batteries 3 and 4 with different weights are replaced and attached to the battery attachment portion 21, the heavy large-sized battery 4 is held by the battery attachment portion 21 so that the center-of-gravity position of the large-sized battery 4 is displaced toward the user side from the center-of-gravity position of the light small-sized battery 3. Therefore, in normal cutting operations, since the portable woodworking cutting machine 1 is pushed in a direction away from the user to advance the cutting operation, when the heavy large-sized battery 4 is attached, the portable woodworking cutting machine 1 is less likely to fall toward the user side.

[0076] According to the embodiment, as shown in FIG. 8, when the small-sized battery 3 is attached, the center of gravity G3 of the main body portion 20 is located within the diameter (thickness range) of the support members 11 and 12 in the front-rear direction. Also, as shown in FIG. 10, even when the large-sized battery 4 is attached, the center of gravity G4 of the main body portion 20 is located within the diameter (within the thickness range) of the support members 11 and 12 in the front-rear direction. From this, when the batteries 3 and 4 are attached to the battery attachment portion 21, the center-of-gravity positions G3 and G4 of the main body portion 20 including the batteries 3 and 4 are located on a virtual plane K including the support members 11 and 12 in the front-rear direction. Therefore, the lifting and lowering operation of the main body portion 20 is performed smoothly.

[0077] According to the embodiment, the main body portion 20 includes a controller 28 that houses a control board including an electric motor 40 that rotates the cutting tool 2 and a control circuit that controls the operation of the electric motor 40. The controller 28 is arranged in a posture that intersects the motor axis J of the electric motor 40 above the electric motor 40. Therefore, the controller 28 is arranged compactly in the vertical direction.

[0078] According to the embodiment, the portable woodworking cutting machine 1 has a top dead center adjusting mechanism 13 that restricts the upward movement range (top dead center) of the main body 20. A lock nut 36b as an operating member of the top dead center adjusting mechanism 13 is provided above the support member 11. At the maximum lowering end position of the downward movement range of the main body 20, the batteries 3 and 4 attached to the battery attachment portion 21 are positioned in a region overlapping the lock nut 36b in the vertical direction. Therefore, the main body 20 can be lowered to a height at which the batteries 3 and 4 are positioned on the side of the lock nut 36b. As a result, a deeper cutting depth of the cutting tool 2 with respect to the workpiece W can be achieved without increasing the size of the portable woodworking cutting machine 1.

[0079] According to the embodiment, the main body 20 has an air inlet 25 for cooling the electric motor on the side opposite to the lock nut 36b which is an operating member. Therefore, outside air is smoothly sucked into the air inlet 25 without being affected by the resistance of the lock nut 36b. As a result, the cooling efficiency of the electric motor 40 is improved.

[0080] According to the embodiment, the battery attachment portion 21 has pedestal housings 24 having a left and right split structure that are butted against each other and joined. Therefore, the assembly work of the battery attachment portion 21 is facilitated.

[0081] According to the embodiment, the portable woodworking cutting machine 1 has a base 10 that abuts against the workpiece W. The main body 20 is provided inseparably from the base 10. Therefore, the battery attachment portion 21 exemplified only for the plunger type portable woodworking cutting machine 1 in which the main body 20 is vertically movable via the left and right support members 11 and 12 is applied. From this, the portable woodworking cutting machine 1 is a cutting machine dedicated to the plunger type that cannot be, for example, separated from the base and replaced with a base for a fixed type that does not have a support member for vertical movement.

[0082] Various changes can be made to the embodiments. For example, although the holding postures (attachment postures) of the batteries 3 and 4 are illustrated with a configuration in which their longitudinal directions L3 and L4 are substantially orthogonal to the virtual plane K in a plan view, the posture may be changed to one that intersects the virtual plane K at an angle of about 50 to 90 degrees in the longitudinal direction. In this case, the inclination of the longitudinal direction L with respect to the virtual plane K includes any inclination in any direction, including up and down and left and right. By holding the posture at an angle with respect to the virtual plane K, the displacement in the left-right direction of the center-of-gravity position of the main body when batteries of different sizes are replaced and attached is suppressed. Thereby, good operability is ensured for the lifting and lowering operation of the main body and the moving operation of the portable woodworking cutting machine.

[0083] Also, since the battery is held at an angle with respect to the virtual plane K and is compactly held within a range where the battery does not protrude from between the left and right support members 11 and 12 in a plan view, it does not interfere with the user when gripping the gripping portions 22 and 23.

[0084] Although the configuration applied to two types of batteries 3 and 4 having the same widths S3 and S4 is illustrated, for example, the illustrated holding posture (a posture in which the longitudinal direction intersects the virtual plane K in the range of about 50 to 90 degrees) can be applied to a plurality of types of batteries having different widths within a range where they do not protrude laterally from the left and right support members 11 and 12.

[0085] In the illustrated embodiment, the configuration using the linear ball bearing 44 for the right support member 12 is illustrated, but it can also be used for the left support member 11. A configuration using a sliding bearing instead of the linear ball bearing may also be used.

[0086] In the embodiment, a router having left and right gripping portions 22 and 23 is illustrated as the portable woodworking cutting machine 1, but the battery holding posture illustrated for a trimmer mainly used for relatively light cutting operations such as edge processing of wood by gripping and moving it with one hand can be applied.

[0087] Although the portable woodworking cutting machine 1 in which one battery 3 (or battery 4) is attached to the upper part of the main body 20 has been illustrated, for example, a portable woodworking cutting machine capable of attaching two batteries may be used. In this case, one battery may be held in the posture illustrated at the upper part of the main body, and the other one may be held, for example, on the base.

Explanation of Signs

[0088] 1…Portable woodworking cutting machine W…Workpiece K…Virtual plane 2…Cutting tool 3…Battery (small size) 3a…Rail receiver, 3b…Terminal receiver (positive electrode), 3c…Terminal receiver (negative electrode) 3d…Step portion, 3e…Lock claw, 3f…Unlock button 4…Battery (large size) 4a…Rail receiver, 4b…Terminal receiver (positive electrode), 4c…Terminal receiver (negative electrode) 4d…Step portion, 4e…Lock claw, 4f…Unlock button 10…Base 10a…Working hole, 10b…Coupling cylinder portion 11…Support member (left side) 12…Support member (right side) 13…Top dead center adjustment mechanism 20…Main body 21…Battery mounting portion 21a…Inlet, 21b…Stopper, 21c…Elastic body, 21d…Rail, 21e…Lock recess 22…Grip portion (left side) 23…Grip portion (right side) 23a…Standby switch, 23b…Start switch, 23c…Lock-on button 24…Pedestal housing 24a…Left pedestal housing, 24b…Right pedestal housing 25…Air inlet 26…Speed change dial 27…Terminal board 27a…Connection terminal (positive electrode), 27b…Connection terminal (negative electrode) 28…Controller G3... Center of gravity position of the main body when a small battery is attached G4... Center of gravity position of the main body when a large battery is attached 30... Main body housing 31... Upper housing 31a, 31b... Support cylinder parts 32... Lower housing 32a, 32b... Support cylinder parts, 32c... Pedestal part (left side), 32d... Pedestal part (right side) 32e... Stopper pedestal part 32f... Exhaust port 33, 34... Bearings 35... Auxiliary housing 36... Auxiliary member 36a... Male screw part, 36b... Lock nut (operating member), 36c... Cap, 36d... Auxiliary sleeve 37... Compression spring 38... Auxiliary member 39... Compression spring 40... Electric motor 41... Motor shaft J... Motor axis 42... Cooling fan 43... Chuck 44... Linear ball bearing 50... Bottom dead center stopper 51... Stopper screw 52... Knob part 53... Release button 55... Stopper receiving part 56, 57, 58... Contact parts 59... Pedestal part

Claims

1. A portable woodworking cutting machine, Left and right support members extending vertically parallel to each other, A main body portion that is supported by the support members so as to be vertically movable at a position between the support members, is biased upward by the biasing force of a compression spring disposed inside the support members, and has a cutting tool mounted thereon, A battery mounting portion to which one battery is removably attached above the main body portion, The battery mounting portion holds the one battery in a posture in which the longitudinal direction of the battery forms an angle of 70 to 90 degrees with respect to a virtual plane including the support members. A portable woodworking cutting machine.

2. A portable woodworking cutting machine, Left and right support members extending vertically parallel to each other, A main body portion that is supported by the support members so as to be vertically movable at a position between the support members, is biased upward by the biasing force of a compression spring disposed inside the support members, and has a cutting tool mounted thereon, Gripping portions provided on both the left and right sides of the main body portion, A battery mounting portion to which one battery is removably attached above the main body portion, The battery mounting portion holds the one battery in a posture in which the longitudinal direction of the battery forms an angle with respect to a virtual plane including the support members. A portable woodworking cutting machine.

3. The portable woodworking cutting machine according to Claim 2, The battery mounting portion holds the battery in a posture in which the longitudinal direction of the battery forms an angle of 50 degrees or more with respect to the virtual plane. A portable woodworking cutting machine.

4. The portable woodworking cutting machine according to Claim 2, The battery mounting portion holds the battery in a posture in which the longitudinal direction of the battery forms an angle of 70 degrees or more with respect to the virtual plane. A portable woodworking cutting machine.

5. The portable woodworking cutting machine according to claim 2, wherein the battery mounting portion holds the battery in a posture having an angle of approximately 90 degrees with respect to the virtual plane in the longitudinal direction.

6. The portable woodworking cutting machine according to any one of claims 1 to 5, wherein the battery mounting portion has a receiving port for receiving the battery on the user side and a stopper for restricting the movement of the battery moved in a direction away from the user from the receiving port.

7. The portable woodworking cutting machine according to any one of claims 1 to 6, wherein when a plurality of types of batteries having different sizes or weights are exchanged and mounted on the battery mounting portion, the center of gravity position of the portable woodworking cutting machine is held at a fixed position in the left-right direction.

8. The portable woodworking cutting machine according to any one of claims 1 to 7, wherein when a plurality of types of batteries having different weights are exchanged and mounted on the battery mounting portion, the heavy battery is held on the battery mounting portion so as to displace the center of gravity position of the battery toward the user side.

9. The portable woodworking cutting machine according to any one of claims 1 to 7, wherein when the battery is mounted on the battery mounting portion, the center of gravity position of the main body portion including the battery is located on the virtual plane.

10. The portable woodworking cutting machine according to any one of claims 1 to 9, wherein the main body portion includes a controller that houses a control board including an electric motor that rotates the cutting tool and a control circuit that controls the operation of the electric motor, and the controller is arranged in a posture intersecting the motor axis above the electric motor.

11. A portable woodworking cutting machine according to any one of claims 1 to 10, comprising an operating member of a top dead center adjusting mechanism for restricting an upward movement range of the main body portion, provided at an upper portion of the support member, wherein the battery attached to the battery attachment portion is positioned in a region overlapping the operating member in the vertical direction at a maximum descending end position of a downward movement range of the main body portion. A portable woodworking cutting machine.

12. A portable woodworking cutting machine according to claim 11, wherein the main body portion has an air intake for cooling an electric motor on a side opposite to the operating member in the left-right direction. A portable woodworking cutting machine.

13. A portable woodworking cutting machine according to any one of claims 1 to 12, wherein the battery attachment portion has a housing having a left and right half-split structure that are butted against each other and coupled. A portable woodworking cutting machine.

14. A portable woodworking cutting machine according to any one of claims 1 to 13, having a base that abuts against a workpiece to be cut, wherein the main body portion is provided inseparably from the base. A portable woodworking cutting machine.

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