JP7554591B2 - Chainsaw - Google Patents

Description

This disclosure relates to a chainsaw.

Chainsaws for cutting wood and other materials are known in the art (see, for example, Patent Document 1).

US Patent Application Publication No. 2018/0079101

The chain saw according to one aspect of this embodiment includes a motor, a housing in which the motor is disposed, a guide bar protruding from the housing, a saw chain disposed on the outer periphery of the guide bar, a battery pack removably attached to the housing and electrically connected to the motor, and a cover connected to the housing and covering at least a portion of the battery pack in an openable and closable manner, the cover including a pivoting part that serves as a pivoting center for opening and closing the cover, and the pivoting part and the battery pack are disposed apart from each other along the longitudinal direction of the guide bar when the battery pack is attached to the housing.

1 is a perspective view showing an example of a chain saw according to an embodiment of the present invention. 1 is a perspective view showing an example of a chain saw according to an embodiment of the present invention. FIG. 2 is a side view of the chain saw shown in FIG. 1 . FIG. 3 is a side view of the chain saw shown in FIG. 2 . FIG. 2 is a top view of the chain saw shown in FIG. 1 . FIG. 2 is a bottom view of the chain saw shown in FIG. 1 . FIG. 2 is a cross-sectional view of the chain saw shown in FIG. 1 . FIG. 2 is a cross-sectional view of the chain saw shown in FIG. 1 . FIG. 9 is a partially enlarged view of FIG. 8 . FIG. 8 is a partially enlarged view of FIG. 7 . FIG. 3 is a cross-sectional view of the chain saw shown in FIG. 2 . FIG. 12 is a partially enlarged view of FIG.

Several embodiments of the chain saw 1000 are described below with reference to the accompanying drawings.

1 and 2 are perspective views of a chain saw 1000. As shown in FIGS. 1 and 2, the chain saw 1000 includes a motor 30, a housing 100 in which the motor 30 is disposed, a guide bar 200 protruding from the housing 100, a saw chain 300 disposed on the outer periphery of the guide bar 200, a battery pack 400 removably attached to the housing 100, and a cover 500 connected to the housing 100 and covering at least a portion of the battery pack 400 in an openable and closable manner. Note that FIG. 1 is a perspective view of the chain saw 1000 with the cover 500 closed, and FIG. 2 is a perspective view of the chain saw 1000 with the cover 500 open.

3 is a side view of the chain saw 1000 with the cover 500 closed, and FIG. 4 is a side view of the chain saw 1000 with the cover 500 open. FIG. 5 is a top view of the chain saw 1000 with the cover 500 closed, and FIG. 6 is a bottom view of the chain saw 1000 with the cover 500 closed. FIG. 7 is a cross-sectional view taken along line vii-vii in FIG. 5, and FIG. 8 is a cross-sectional view taken along line viii-viii in FIG. 5. FIG. 9 is an enlarged cross-sectional view of the vicinity of the battery pack 400 in FIG. 8. FIG. 10 is an enlarged cross-sectional view of the vicinity of the battery pack 400 showing another embodiment of the chain saw 1000. FIG. 11 is a cross-sectional view of the chain saw 1000 with the cover 500 open, and FIG. 12 is an enlarged cross-sectional view of the vicinity of the battery pack 400 in FIG. 11.

For the purposes of the following explanation, as shown in FIG. 3, the direction along the longitudinal direction of the guide bar 200 in a side view of the chain saw 1000 is defined as the front-rear direction. The guide bar 200 side relative to the housing 100 is defined as the front side, and the housing 100 side relative to the guide bar 200 is defined as the rear side. The direction perpendicular to the front-rear direction is defined as the up-down direction. The cover 500 side relative to the housing 100 is defined as the upper side, and the housing 100 side relative to the cover 500 is defined as the lower side. Furthermore, the direction perpendicular to the front-rear direction and the up-down direction (the depth direction of the paper in FIG. 3) is defined as the left-right direction.

As shown in FIG. 8 etc., a motor 30 is disposed inside the housing 100. There are no particular limitations on the type of motor 30, but the motor 30 may be, for example, a brushless motor.

The housing 100 has a front surface 101, a rear surface 103, a top surface 105, a bottom surface 107, and side surfaces 109.

A guide bar 200 is disposed on the front surface 101 of the housing 100, protruding forward from the housing 100. The guide bar 200 is a plate-shaped member extending in the front-rear direction, and a saw chain 300 is disposed on the outer periphery of the guide bar 200. The saw chain 300 engages with a sprocket (not shown) attached to the output shaft of the motor 30. When the sprocket rotates in response to the drive of the motor 30, the saw chain 300 engaged with the sprocket rotates along the outer periphery of the guide bar 200. When the operator brings the saw chain 300 rotating on the guide bar 200 into contact with a work object such as wood, the work object is cut by the saw chain 300.

A rear handle 700 is provided on the rear surface 103 of the housing 100. The rear handle 700 is a part that an operator holds with one hand when using the chain saw 1000. The rear handle 700 is disposed at the rear end of the chain saw 1000. The chain saw 1000 further includes a front handle 600 disposed forward of the rear handle 700. The front handle 600 is connected to a side surface 109 of the housing 100. The front handle 600 is a part that an operator holds with the other hand when using the chain saw 1000. The shapes of the rear handle 700 and the front handle 600 are not particularly limited, but may be cylindrical, for example. The rear handle 700 and the front handle 600 may be members different from the housing 100, or the rear handle 700 and the front handle 600 may be formed integrally with the housing 100.

8 and other figures, the rear handle 700 is provided with a trigger 800. The trigger 800 is a member that can be operated by an operator, and the motor 30 is driven in response to the operation of the trigger 800. The trigger 800 is, for example, a push-in type operating member. The trigger 800 may be provided on the rear surface 103 or the side surface 109 of the housing 100. A switch 50 is disposed inside the housing 100. The switch 50 is further electrically connected to a control device 70 disposed inside the housing 100, and the control device 70 is electrically connected to the motor 30. The switch 50 outputs an operation signal to the control device 70 in response to the operation of the trigger 800 by the operator. The control device 70 that receives the operation signal outputs a control signal to the motor 30 to drive the motor 30.

A battery pack 400 is removably attached to the housing 100. "Removable" refers to a state in which an operator can attach the battery pack 400 to the housing 100 when using the chain saw 1000, and can remove the battery pack 400 from the housing 100 when not using the chain saw 1000. The battery pack 400 attached to the housing 100 supplies power to the motor 30 via a circuit provided in the housing 100.

The battery pack 400 is disposed on the top surface 105 or the side surface 109 of the housing 100. At least a portion of the battery pack 400 is disposed rearward of the motor 30 and the front handle 600. The battery pack 400 is disposed forward of the rear handle 700, the trigger 800, and the switch 50.

The shape of the battery pack 400 is not particularly limited. For example, the battery pack 400 may be rectangular or cylindrical.

The battery pack 400 is disposed, for example, between the front handle 600 and the rear handle 700. The motor 30 is disposed forward of the battery pack 400.

The number of battery packs 400 attached to the housing 100 is not particularly limited. That is, one battery pack 400 may be attached to the housing 100, or multiple battery packs 400 may be attached to the housing 100.

A cover 500 is connected to the housing 100. The cover 500 is arranged to openably cover at least a portion of the battery pack 400 attached to the housing 100. By providing the cover 500, the possibility of rainwater, dust, and other foreign matter adhering to the battery pack 400 attached to the housing 100 can be reduced. Note that "openable" refers to a state in which an operator can close the cover 500 to cover the battery pack 400 when using the chain saw 1000, and can open the cover 500 to expose the battery pack 400 when removing the battery pack 400 from the housing 100.

9 and the like, the cover 500 includes a rotating part 501 that serves as a center of rotation when the cover 500 is opened and closed, and a cover body 510 that moves around the rotating part 501 as an axis when the cover 500 is opened and closed. The cover body 510 has, for example, a concave shape, and a part of the battery pack 400 is disposed inside this concave shape. The rotating part 501 is disposed so as to cover the outer peripheral surface of the rotating shaft 100X provided in the housing 100. The rotating shaft 100X is disposed so that the left-right direction is the longitudinal direction in the housing 100. The rotating shaft 100X is, for example, a hollow cylindrical member. The rotating part 501 rotates around the rotating shaft 100X as a fulcrum when the cover 500 is opened and closed. The rotating part 501 is connected to the cover body 510, and the cover body 510 moves in accordance with the rotation of the rotating part 501. The rotating part 501 may be a part of the cover body 510. That is, the rotating part 501 and the cover body 510 may be made of the same member. The rotating part 501 may be a shaft-shaped member extending in the left-right direction of the chain saw 1000, and the rotating part 501 may be inserted into a hole provided in the housing 100.

The pivoting part 501 of the cover 500 is disposed on the rear side of the cover 500. Therefore, when the cover 500 is opened from a closed state, the cover body 510 moves rearward. On the other hand, when the cover 500 is closed from an open state, the cover body 510 moves forward. With this configuration, the cover 500 in the open state does not interfere with the front handle 600, improving the design freedom of the front handle 600. Note that in this case, the pivoting part 501 of the cover 500 is disposed rearward of the battery pack 400.

The pivoting portion 501 of the cover 500 may be disposed on the front side of the cover 500. In this case, when the cover 500 is opened from a closed state, the cover body 510 moves to the front side. On the other hand, when the cover 500 is closed from an open state, the cover body 510 moves to the rear side.

9 and other figures, the rotating part 501 and the battery pack 400 are disposed apart in the front-rear direction of the chain saw 1000, and a space exists between the rotating part 501 and the battery pack 400. In other words, a gap exists between the rotating part 501 and the battery pack 400 in the front-rear direction of the chain saw 1000. This configuration improves the convenience for the operator when removing the battery pack 400 from the housing 100.

When attaching or detaching the battery pack 400 to or from the housing 100, the operator holds the front handle 600 with one hand while attaching or detaching the battery pack 400 with the other hand. Alternatively, when attaching or detaching the battery pack 400 to or from the housing 100, the operator places the chain saw 1000 on the ground and attaches or detaches the battery pack 400 with one hand. When the rotating part 501 and the battery pack 400 are arranged apart in the front-rear direction of the chain saw 1000, the operator can insert his or her fingers between the rotating part 501 and the battery pack 400. As a result, the operator can easily grip the battery pack 400, and the operation of removing the battery pack 400 becomes easier. In the front-rear direction of the chain saw 1000, the rotating part 501 and the battery pack 400 may be arranged apart from each other by, for example, about 10 mm to 50 mm.

"The rotating part 501 and the battery pack 400 are disposed apart" includes, for example, the following configurations. As shown in FIG. 9, in a cross-sectional view along the front-rear and up-down directions of the chain saw 1000 (hereinafter, may be referred to as a vertical cross-sectional view), a line segment L is imagined that connects the rotating part 501 and the battery pack 400 in the front-rear direction. If no other members exist between the rotating part 501 and the battery pack 400 along the line segment L, it may also be said that "there is a space between the rotating part 501 and the battery pack 400."

The pivoting portion 501 of the cover 500 may be disposed between the battery pack 400 and the rear handle 700 along the front-to-rear direction of the chain saw 1000.

As shown in FIG. 8 etc., a recess 110 may be provided on the top surface 105 of the housing 100. The battery pack 400 may be attached to the housing 100 by disposing at least a portion of the battery pack 400 inside the recess 110. In this case, the cover 500 is disposed so as to cover the recess 110.

The recess 110 has a front surface 111 and a rear surface 113. The front surface 111 is the front surface of the inner surface of the recess 110. The rear surface 113 is the rear surface of the inner surface of the recess 110. As shown in FIG. 7 etc., the front surface 111 of the recess 110 faces the front surface 401 of the battery pack 400. The rear surface 113 of the recess 110 faces the rear surface 403 of the battery pack 400.

The rear surface 113 of the recess 110 and the pivoting part 501 of the cover 500 are spaced apart in the front-to-rear direction of the chain saw 1000. Therefore, the battery pack 400 attached to the recess 110 is located apart from the pivoting part 501 in the front-to-rear direction.

As shown in FIG. 9 etc., the pivoting part 501 of the cover 500 is disposed above the support surface 120 of the housing 100. The support surface 120 is arc-shaped in a vertical cross-sectional view of the chain saw 1000. The pivoting part 501 of the cover 500 pivots above the support surface 120 as the cover 500 is opened or closed. The pivoting part 501 and the support surface 120 are not in direct contact with each other, and a gap may exist between the pivoting part 501 and the support surface 120.

The support surface 120 is connected to the rear surface 113 of the recess 110 via the connection surface 130. The end 130A of the connection surface 130 on the rear surface 113 side of the recess 110 may be located lower than the end 130B of the connection surface 130 on the support surface 120 side. In other words, the end 130A of the connection surface 130 on the battery pack 400 side may be located lower than the end 130B of the connection surface 130 on the rotating part 501 side. With this configuration, when rainwater or the like enters between the rotating part 501 and the support surface 120, the possibility of the rainwater entering the inside of the recess 110 can be reduced.

The battery pack 400 may be, for example, rectangular. When the battery pack 400 is attached to the recess 110, the longitudinal direction of the battery pack 400 may be aligned with the vertical direction of the chain saw 1000. In other words, in a vertical cross-sectional view of the chain saw 1000, the longitudinal direction of the battery pack 400 may intersect with the front-rear direction of the chain saw 1000. In this case, the front surface 401 and the rear surface 403 of the battery pack 400 are surfaces aligned with the longitudinal direction of the battery pack 400. With this configuration, the portion of the battery pack 400 exposed from the housing 100 can be increased, making it even easier to remove the battery pack 400.

10, the cover 500 may have a rib 555. More specifically, the cover body 510 may have a rib 555 on the housing 100 side, and the rib 555 may be in contact with the battery pack 400 when the cover 500 is closed. With this configuration, the cover 500 cannot be completely closed when the battery pack 400 is only halfway attached to the recess 110. In other words, the cover 500 cannot be completely closed when the battery pack 400 is not completely attached to the recess 110. As a result, the possibility of accidentally removing the battery pack 400 during use of the chain saw 1000 can be reduced. The rib 555 is disposed, for example, on the front side of the cover body 510. The cover 500 may be configured such that the rib 555 presses the battery pack 400 when the battery pack 400 is not completely attached to the recess 110 by closing the cover 500 when the battery pack 400 is not completely attached to the recess 110, so that the battery pack 400 is completely attached to the recess 110.

A housing side engaging portion 141 may be provided on the rear surface 111 of the recess 110, and a battery pack side engaging portion 142 may be provided on the front surface 401 of the battery pack 400. The battery pack 400 may be attached to the housing 100 by engaging the housing side engaging portion 141 with the battery pack side engaging portion 142.

A grip portion 410 may be provided on the rear surface 403 of the battery pack 400. The grip portion 410 is a portion that is gripped by an operator when removing the battery pack 400 from the housing 100. When the battery pack 400 is attached to the housing 100, the grip portion 410 of the battery pack 400 may be disposed above the rear surface 113 of the recess 110. This configuration makes it even easier to remove the battery pack 400. The grip portion 410 is, for example, a recess provided on the outer surface of the battery pack 400.

The rear surface 113 of the recess 110 may be located below the front surface 111 of the recess 110. More specifically, in a vertical cross-sectional view of the chain saw 1000, the upper end of the rear surface 113 of the recess 110 may be located below the upper end of the front surface 111 of the recess 110. With this configuration, the exposed area of the rear surface 403 of the battery pack from the housing 100 can be increased while ensuring the contact area between the front surface 401 of the battery pack 400 and the front surface 111 of the recess 110. As a result, the battery pack 400 can be easily removed while maintaining the retention of the battery pack 400 in the housing 100. The upper end of the rear surface 113 of the recess 110 is connected to the end 130A of the connection surface 130 on the battery pack 400 side.

3, the cover 500 may include an engagement portion 550 that engages with the housing 100. The engagement portion 550 can receive operation from the operator. More specifically, the operator can operate the engagement portion 550 to switch between an engaged state in which the cover 500 engages with the housing 100 and a disengaged state in which the cover 500 does not engage with the housing 100. By providing the engagement portion 550, the cover 500 can be fixed to the housing 100 when the cover 500 is closed. As a result, the possibility of the cover 500 accidentally opening while the chain saw 1000 is in use can be reduced.

When the cover 500 is closed, the engagement portion 550 may be located on the front side of the cover 500, and the pivot portion 501 may be located on the rear side of the cover 500.

As shown in FIG. 8 etc., when the cover 500 is closed, the rotating part 501 may be disposed below the engaging part 550. In other words, as shown in FIG. 7, when the straight line connecting the rotating part 501 and the engaging part 550 is a straight line L1 in a vertical cross-sectional view of the chain saw 1000, the straight line L1 may be inclined downward toward the rotating part 501 side (rear side) of the chain saw 1000. With this configuration, the exposed area of the rear surface 403 of the battery pack from the housing 100 can be increased while the engaging part 550 is provided on the upper side of the chain saw 1000. As a result, the removal work of the battery pack 400 can be facilitated while maintaining the operability of the engaging part 550. The straight line L1 passes through the center of the rotating part 501 and the engaging part 550 in a vertical cross-sectional view of the chain saw 1000. The inclination angle θ1 of the straight line L1 is, for example, 20° to 40°. The inclination angle θ1 refers to the inclination angle of the straight line L1 relative to the extension line of the lower surface 107 of the housing 100 when viewed in vertical cross section of the chain saw 1000.

As shown in FIG. 8, if the extension line of the axis of the rear handle 700 of the chainsaw 1000 is a straight line L2, the straight line L2 is inclined downward on the rotating part 501 side (rear side) of the chainsaw 1000. This configuration improves the grip of the rear handle 700. The inclination angle θ2 of the straight line L2 is, for example, 0° to 20°. The inclination angle θ2 refers to the inclination angle of the straight line L2 with respect to the bottom surface 107 of the housing 100 in a cross-sectional view of the chainsaw 1000 in the front-to-rear direction.

Furthermore, the inclination angle θ2 of the line segment L2 may be smaller than the inclination angle θ1 of the line segment L1 connecting the rotating portion 501 and the engaging portion 550. This configuration can improve the operability of the cover 500, the grip of the rear handle 700, and the ease of removing the battery pack 400.

As shown in FIG. 3, the housing 100 may have a protrusion 150 that protrudes outward. For example, a pair of protrusions 150 are provided on the left and right side surfaces 109 of the housing 100. A space exists inside the protrusion 150, and the space is connected to the recess 110. In other words, the protrusion 150 is connected to the recess 110 inside the housing 100.

The protrusion 150 has an opening 170. The opening 170 is provided on the lower surface of the protrusion 150. By providing the opening 170 on the protrusion 150, when water such as rainwater enters the recess 110, the water is discharged from the opening 170 of the protrusion 150 connected to the recess 110. Since the opening 170 is provided on the lower surface of the protrusion 150, the possibility of rainwater entering the inside of the protrusion 150 and the recess 110 from the outside of the housing 100 through the opening 170 can be reduced.

The protrusion 150 may be provided on only one of the left and right side surfaces 109 of the housing 100. The protrusion 150 may extend to the front surface 101, rear surface 103, top surface 105, and bottom surface 107 of the housing 100. The protrusion 150 may be connected to the rear handle 700.

8, at least a portion of the switch 50 may be located between the battery pack 400 and the pivoting part 501 of the cover 500 in the front-rear direction of the chain saw 1000. More specifically, at least a portion of the switch 50 may be located in the area between the rear surface 403 of the battery pack 400 and the center of the pivoting part 501 in a vertical cross-sectional view of the chain saw 1000. With this configuration, the chain saw 1000 can be made smaller.

Similarly, at least a portion of the control device 70 may be located between the battery pack 400 and the rotating part 501 of the cover 500 in the front-rear direction of the chain saw 1000. More specifically, at least a portion of the control device 70 may be located in the area between the rear surface 403 of the battery pack 400 and the center of the rotating part 50B in a vertical cross-sectional view of the chain saw 1000. With this configuration, the chain saw 1000 can be made smaller.

The housing 100 may have multiple ventilation holes 190 arranged along the front-to-rear direction of the chain saw 1000. With this configuration, outside air is drawn in through one ventilation hole 190 and exhausted through the other ventilation holes 190 after passing through the inside of the housing 100, thereby allowing the motor 30, switch 50, control device 70, and other components arranged inside the housing to be cooled by the outside air.

As shown in FIG. 3 etc., at least one ventilation hole 190 may be disposed behind the protruding portion 150. With such a configuration, the scattering of chips cut by the saw chain 300 is blocked by the protruding portion 150, reducing the possibility of the scattering material entering the housing 100 through the ventilation hole 190. The ventilation hole 190 disposed behind the protruding portion 150 may be an intake port or an exhaust port. The ventilation hole 190 disposed behind the protruding portion 150 may be disposed behind the battery pack 400 in a side view of the chain saw 1000.

Although several embodiments of the chain saw 1000 have been described above, the chain saw 1000 is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the chain saw.

1000 Chain saw 30 Motor 50 Switch 70 Control device 100 Housing 200 Guide bar 300 Saw chain 400 Battery pack 500 Cover 600 Front handle 700 Rear handle 800 Trigger

Claims (11)

A chainsaw,
A motor;
a housing in which the motor is disposed;
A guide bar protruding from the housing;
A saw chain disposed on an outer periphery of the guide bar;
a battery pack that is detachably attached to the housing and electrically connected to the motor;
a cover connected to the housing and adapted to open and close at least a portion of the battery pack;
the housing includes a first recess into which at least a portion of the battery pack is disposed;
the cover covers the first recess in an openable and closable manner and includes a rotation portion that serves as a rotation center when the cover is opened and closed;
When the battery pack is attached to the housing , the rotating portion and the battery pack are disposed apart from each other,
When the side of the chain saw held by the user is the upper side,
The cover closes to cover the first recess from above . a handle having a portion located between the guide bar and the battery pack in a direction along a longitudinal direction of the guide bar and located above the housing;
The chain saw according to claim 1 , wherein the battery pack is inserted into the first recess from above. The chain saw of claim 2 , wherein the cover opens in a direction different from the side of the portion of the handle. The chain saw according to claim 3 , wherein the cover opens to a side opposite the portion of the handle. The first recess includes a first surface and a second surface opposite to the first surface,
When the opposite side of the upper side is the lower side,
an upper end of the first surface is located lower than an upper end of the second surface;
the battery pack has a third surface that faces the first surface when the battery pack is attached to the housing;
The chain saw according to claim 1 , wherein the third surface has a first region that is located above the first surface in the attached state. The chain saw according to claim 5 , wherein the first region is provided with a second recess serving as a grip portion. the housing has a connection surface connected to the first surface of the first recess,
the rotation portion is located on an opposite side to the battery pack side with respect to the connection surface,
The chain saw according to claim 6, wherein an end of the connection surface on the side of the battery pack is located lower than an end of the connection surface on the side of the rotation portion. The chain saw according to claim 7 , wherein the connection surface is located below the second recess. 9. The chain saw according to claim 1, wherein an upper end of the battery pack is located above the rotating part when the battery pack is attached to the housing. When the opposite side of the upper side is the lower side,
The chain saw according to claim 1 , wherein the rotating portion is positioned above a lower surface of the battery pack when the battery pack is attached to the housing. A chainsaw,
A motor;
a housing in which the motor is disposed;
A guide bar protruding from the housing;
A saw chain disposed on an outer periphery of the guide bar;
a battery pack that is detachably attached to the housing and electrically connected to the motor;
a cover connected to the housing and adapted to open and close at least a portion of the battery pack;
The cover includes a rotation portion that serves as a rotation center when the cover is opened or closed,
a gap is present between the rotating portion and the battery pack when the battery pack is attached to the housing;
When the side of the chain saw held by the user is the upper side,
The cover closes from above to cover at least a portion of the battery pack.