JP6944333B2 - Chainsaw - Google Patents

Description

The techniques disclosed herein relate to chainsaws.

Patent Document 1 discloses a chainsaw. The chainsaw consists of a motor that rotates the saw chain around a guide bar, a control unit that controls the voltage applied to the motor, a main body housing that houses the motor and control unit, and a battery that is detachably attached to the main body housing. And, it has a top handle provided above the main body housing.

Japanese Unexamined Patent Publication No. 2014-37080

In the conventional chainsaw, there is room for improvement in the layout of parts inside the main body housing, and the dimensions of the main body housing are large. The present specification provides a technique capable of further reducing the size of the main body housing.

This specification discloses a chainsaw. The chainsaw consists of a motor that rotates the saw chain around the guide bar, a control unit that controls the voltage applied to the motor, a main body housing that houses the motor and control unit, and a battery that is detachably attached to the main body housing. , It has a top handle provided on the top of the main body housing. The control unit is located above the battery. When the chainsaw is viewed from behind with the chainsaw mounted, the battery and control unit do not overlap. When the chainsaw is viewed from above with the chainsaw mounted, the battery and control unit are at least partially overlapped.

According to the above configuration, the dimensions of the main body housing in the front-rear direction can be further reduced as compared with the case where the control unit and the battery are arranged so as to be displaced in the front-rear direction so as not to overlap each other.

It is a perspective view of the chainsaw 2 of an Example. It is a right side view of the chainsaw 2 of an Example. FIG. 2 is a left side view of the chainsaw 2 of the embodiment in a state where the side handle 14 and the left side housing 10 are removed. FIG. 5 is a cross-sectional view of the chainsaw 2 of the embodiment in the vicinity of the motor 34. FIG. 2 is a right side view of the chainsaw 2 of the embodiment in a state where the sprocket cover 20 is removed. FIG. 2 is a right side view of the chainsaw 2 of the embodiment in a state where the sprocket cover 20, the guide bar 6, and the brake cover 18 are removed. It is a vertical sectional view of the oil pump 38 of the chainsaw 2 of an Example. It is a perspective view of the oil pump 38 of the chainsaw 2 of an Example. It is a perspective view of the plunger 88 of the chainsaw 2 of an Example. It is a top view of the chainsaw 2 of an embodiment.

In one or more embodiments, the chainsaw is a motor that rotates the saw chain around a guide bar, a control unit that controls the voltage applied to the motor, a body housing that houses the motor and the control unit, and a body. It may include a battery detachably attached to the housing and a top handle provided on top of the body housing. The control unit may be located above the battery. When the chainsaw is viewed from behind with the chainsaw mounted, the battery and control unit do not have to overlap. When the chainsaw is viewed from above with the chainsaw mounted, the battery and control unit may at least partially overlap.

According to the above configuration, the dimensions of the main body housing in the front-rear direction can be further reduced as compared with the case where the control unit and the battery are arranged so as to be displaced in the front-rear direction so as not to overlap each other.

In one or more embodiments, a hand rest may be formed near where the rear end of the top handle of the body housing connects to the body housing. The control unit may be located inside the hand rest.

According to the above configuration, the convenience of the user can be improved by forming the hand rest in the vicinity of the portion of the main body housing where the rear end of the top handle is connected to the main body housing. Further, according to the above configuration, by arranging the control unit in the space inside the hand rest of the main body housing, the space inside the hand rest can be effectively utilized, and the dimensions of the main body housing can be further reduced. can do.

In one or more embodiments, the top handle and battery do not have to overlap when the chainsaw is viewed from the rear with the chainsaw mounted. When the chainsaw is viewed from above with the chainsaw mounted, the top handle and battery may at least partially overlap.

According to the above configuration, the control unit is arranged in the space between the top handle and the battery inside the main body housing. According to the above configuration, the dimensions of the main body housing in the front-rear direction can be further reduced as compared with the case where the top handle and the battery are arranged so as to be displaced in the front-rear direction so as not to overlap each other.

In one or more embodiments, the battery may be removable by sliding it laterally with respect to the body housing.

According to the above configuration, the dimensions of the main body housing in the front-rear direction can be further reduced as compared with the case where the battery is slid in the front-rear direction with respect to the main body housing to be attached and detached.

In one or more embodiments, the chainsaw is a motor that rotates the saw chain around a guide bar, a control unit that controls the voltage applied to the motor, a body housing that houses the motor and the control unit, and a body. It may include a battery detachably attached to the housing and a top handle provided on top of the body housing. When the chainsaw is viewed from above with the chainsaw mounted, the motor and battery do not have to overlap, and the motor and control unit do not have to overlap. When the chainsaw is viewed from the rear with the chainsaw mounted, the motor and the battery may at least partially overlap, and the motor and the control unit may at least partially overlap.

In a chainsaw equipped with a motor, in many cases, the motor is arranged so that its output shaft is along the left-right direction of the chainsaw. In this case, if the battery or the control unit is arranged above or below the motor inside the main body housing, the vertical dimension of the main body housing becomes large. According to the above configuration, since the battery and the control unit are not arranged above or below the motor inside the main body housing, the vertical dimension of the main body housing can be further reduced. Further, according to the above configuration, when the chainsaw is viewed from the rear, the motor and the battery are at least partially overlapped with each other, and the motor and the control unit are at least partially overlapped with each other. The dimensions can also be reduced.

In one or more embodiments, the battery and control unit may be located behind the motor.

According to the above configuration, the battery can be attached / detached behind the main body housing at a position away from the guide bar, and the user can easily attach / detach the battery. Further, according to the above configuration, since both the battery and the control unit are arranged behind the motor, the dimensions of the main body housing in the front-rear direction can be further reduced.

In one or more embodiments, when the chainsaw is viewed from above with the chainsaw mounted, within a range of 1.2 times the width of the battery in the left-right direction from the centerline in the left-right direction of the battery. The motor may be arranged.

According to the above configuration, the dimensions of the main body housing in the left-right direction can be further reduced as compared with the case where the battery and the motor are arranged with a large offset in the left-right direction of the chainsaw.

In one or more embodiments, the chainsaw comprises a motor that rotates the saw chain around a guide bar, an oil pump that supplies lubricating oil to the saw chain in conjunction with the rotation of the motor, and a motor and oil pump. It may be provided with a main body housing for accommodating. The chainsaw may further include a discharge amount adjusting mechanism including an adjusting member for adjusting the discharge amount of the lubricating oil in the oil pump. The discharge amount adjusting mechanism may be arranged on the surface of the main body housing that is exposed to the outside when the chainsaw is placed.

According to the above configuration, the discharge amount adjusting mechanism is arranged on the surface of the main body housing that is exposed to the outside when the chainsaw is placed. Therefore, when adjusting the discharge amount of the lubricating oil, the user can use the chainsaw. The adjusting member can be operated with the vehicle mounted. The work of adjusting the discharge amount of the lubricating oil can be easily performed.

In one or more embodiments, the chainsaw may further include a top handle provided on top of the body housing. The discharge amount adjusting mechanism may be arranged on the left side of the top handle.

According to the above configuration, when adjusting the discharge amount of the lubricating oil, the user can operate the adjusting member with the left hand even when the top handle is held by the right hand and the chainsaw is held. The work of adjusting the discharge amount of the lubricating oil can be easily performed.

In one or more embodiments, the oil pump may be located on the left side of the motor.

If the oil pump is arranged on the right side of the motor and the discharge amount adjusting mechanism is arranged on the left side of the top handle, the discharge amount adjusting mechanism needs to have a complicated structure. According to the above configuration, since the oil pump is arranged on the left side of the motor and the discharge amount adjusting mechanism is arranged on the left side of the top handle, the discharge amount adjusting mechanism can have a simple structure.

In one or more embodiments, the chainsaw may further include a side handle provided on the left side of the body housing. The discharge amount adjusting mechanism may be arranged behind the front end of the side handle.

According to the above configuration, the side handle does not get in the way when the user operates the adjusting member. The work of adjusting the discharge amount of the lubricating oil can be performed more easily.

In one or more embodiments, the discharge rate adjusting mechanism may be located on the top surface of the body housing.

According to the above configuration, the user can visually recognize the adjusting member without bending over or lifting the chainsaw to the height of the line of sight. Therefore, the user can more easily perform the work of operating the adjusting member.

In one or more embodiments, the adjusting member may be located inside the body housing. The discharge amount adjusting mechanism is formed in the main body housing, and may further include an adjusting opening through which a tool for operating the adjusting member can pass.

According to the above configuration, since the adjusting member is arranged inside the main body housing, it is possible to prevent the adjusting member from being erroneously operated.

In one or more embodiments, the chainsaw is a prime mover that rotates the saw chain around a guide bar, a sprocket that transmits the rotation of the prime mover to the saw chain, a body housing that houses the prime mover, and a sprocket that covers the sprocket. It may include a cover and a top handle provided above the body housing. When the chainsaw is viewed from above with the chainsaw mounted, the ratio of the distance from the right end face of the top handle to the center line of the guide bar to the distance from the right end face of the top handle to the right end face of the sprocket cover is It may be 0.3 or less.

According to the above configuration, the top handle and the guide bar are arranged relatively close to each other in the left-right direction, so that when the user grips the top handle, it is easy to intuitively grasp the cutting position by the saw chain. can do. Further, according to the above configuration, the center of gravity of the guide bar is located close to the top handle and close to the center of gravity of the chainsaw in the left-right direction of the chainsaw. Therefore, even when different types of guide bars are attached, it is possible to prevent the position of the center of gravity of the chainsaw from changing in the left-right direction of the chainsaw.

In one or more embodiments, when the chainsaw is viewed from above with the chainsaw mounted, it is within the range of twice the width of the top handle in the left-right direction from the center line in the left-right direction of the top handle. The center of gravity of the chainsaw may be arranged.

According to the above configuration, when the user holds the chainsaw by grasping the top handle with his right hand, the chainsaw is less likely to tilt to the left or right. The workability of cutting work using a chainsaw can be improved.

In one or more embodiments, the prime mover may be a motor.

Since the structure of the motor is simpler than that of other prime movers such as engines, it is easy to specify the position of the center of gravity when designing a chainsaw, and it is easy to adjust the mounting position inside the main body housing. According to the above configuration, by balancing the weight of the guide bar and the weight of the motor, the center of gravity of the chainsaw can be arranged in the vicinity of the top handle in the left-right direction of the chainsaw.

In one or more embodiments, the chainsaw may further include a battery detachably attached to the body housing.

When power is supplied by a battery, unlike the case where power is supplied by a power cord, the battery attached to the main body housing can be used as a heavy object for adjusting the position of the center of gravity of the chainsaw. According to the above configuration, by balancing the weight of the guide bar, the weight of the motor, and the weight of the battery, the center of gravity of the chainsaw can be arranged in the vicinity of the top handle in the left-right direction of the chainsaw.

(Example)
As shown in FIG. 1, the chainsaw 2 of this embodiment includes a main body 4, a guide bar 6, and a saw chain 8. The guide bar 6 is an elongated plate-shaped member attached to the main body 4 so as to project forward from the main body 4. The saw chain 8 includes a plurality of cutters connected to each other and is attached along the peripheral edge of the guide bar 6. A battery B is attached to the main body 4. The chainsaw 2 cuts an object to be cut such as wood by rotationally driving the saw chain 8 along the peripheral edge of the guide bar 6 by the electric power supplied from the battery B. In the following description, when the chainsaw 2 is mounted on a mounting surface P (see FIG. 2) such as the ground, the direction orthogonal to the mounting surface P is referred to as the vertical direction of the chainsaw 2, and the mounting surface P The direction in which the longitudinal direction of the guide bar 6 is projected is referred to as the front-rear direction of the chainsaw 2, and the direction orthogonal to the vertical and front-rear directions of the chainsaw 2 is referred to as the left-right direction of the chainsaw 2. In drawings other than FIG. 1, the saw chain 8 is not shown for the sake of clarity.

As shown in FIGS. 1 and 2, the main body 4 includes a left side housing 10, a right side housing 12, a side handle 14, a hand guard 16, a brake cover 18, and a sprocket cover 20. The left housing 10 and the right housing 12 form a main body housing 22 and a top handle 24. The left housing 10 forms the outer shape of the left half surface of the main body housing 22 and the top handle 24, and the right housing 12 forms the outer shape of the right half surface of the main body housing 22 and the top handle 24.

The main body housing 22 includes a substantially rectangular parallelepiped front main body housing 22a having a longitudinal direction in the front-rear direction of the main body 4, and a rear main body housing 22b extending rearward from the rear upper portion of the front main body housing 22a. A battery mounting portion 22c to which the battery B can be attached and detached by sliding the battery B in the left-right direction is formed on the lower surface of the rear main body housing 22b. As shown in FIG. 2, when the chainsaw 2 is mounted on the mounting surface P with the battery B attached to the chainsaw 2, the lower surface of the front main body housing 22a comes into contact with the mounting surface P and the battery B The lower surface of the surface also abuts on the mounting surface P.

As shown in FIG. 1, the top handle 24 has a substantially prismatic support portion 24a projecting upward from the front upper surface of the front main body housing 22a, and extends rearward from the rear upper portion of the support portion 24a. A grip portion 24b having a substantially circular cross section is provided which is curved downward and is connected to the upper surface of the rear main body housing 22b. A recess 24c is formed on the upper surface of the support portion 24a. Inside the recess 24c, a power switch 26 for the user to switch the power on / off of the chainsaw 2 and a power lamp 28 for displaying the power on / off state of the chainsaw 2 are arranged. A trigger switch 30 for the user to operate the rotational drive of the saw chain 8 is arranged on the front lower surface of the grip portion 24b. A trigger lock lever 32 that switches between a state in which the operation of the trigger switch 30 by the user is permitted and a state in which the operation of the trigger switch 30 is prohibited by the user is arranged on the upper portion of the grip portion 24b.

The side handle 14 has a substantially U-shaped outer shape that connects the upper rear left surface of the support portion 24a of the top handle 24 and the lower rear left surface of the front main body housing 22a. The cross-sectional shape of the side handle 14 is substantially circular. When using the chainsaw 2, the user holds the chainsaw 2 by grasping the top handle 24 with his right hand and the side handle 14 with his left hand. From this state, when the user pushes down the trigger lock lever 32 of the top handle 24 with the palm of the right hand, the operation of the trigger switch 30 by the user is permitted, and the user pushes up the trigger switch 30 with the index finger of the right hand. As a result, the saw chain 8 is rotationally driven. A hand rest 22d on which the user can place his / her hand is formed on the upper surface of the rear main body housing 22b, that is, at a position where the grip portion 24b of the top handle 24 is connected to the main body housing 22.

As shown in FIG. 3, a motor 34, an oil tank 36, and an oil pump 38 are arranged inside the front main body housing 22a. Further, a control unit 40 is arranged inside the rear main body housing 22b. The oil tank 36 is arranged in front of the motor 34 and the oil pump 38.

As shown in FIG. 4, the motor 34 is an outer rotor type DC brushless motor. The motor 34 penetrates the stator 44 around which the coil 42 is wound, the rotor 46 arranged outside the stator 44, the cooling fan 48 fitted to the rotor 46, and the center of the stator 44 and the rotor 46. The output shaft 50 is fitted to the cooling fan 48. The stator 44 is fixed to the main body housing 22. The coil 42 of the stator 44 is connected to the control unit 40 (see FIG. 2). The control unit 40 has a built-in inverter circuit including a switching element and a control circuit for controlling the operation of each switching element, and controls the operation of the motor 34 by controlling the voltage applied to the coil 42. The output shaft 50 is arranged along the left-right direction of the chainsaw 2, and is rotatably supported by the main body housing 22 via bearings 52 and 54. The bearing 52 is arranged on the right side of the stator 44, and the bearing 54 is arranged on the left side of the stator 44 and the cooling fan 48. A sprocket 56 and a brake base 58 are fixed in the vicinity of the right end of the output shaft 50. The sprocket 56 and the brake base 58 are arranged on the right side of the bearing 52. A brake drum 60 is fitted to the brake base 58.

As shown in FIG. 5, the sprocket 56 is exposed to the outside of the right housing 12. A saw chain 8 (see FIG. 1) is bridged from the guide bar 6 to the sprocket 56. When the motor 34 is driven, the sprocket 56 rotates with the output shaft 50, which causes the saw chain 8 to rotate around the sprocket 56 and the guide bar 6.

The guide bar 6 is fixed to the right housing 12 in a state of being sandwiched between the inner guide plate 61 and the outer guide plate 62. The inner guide plate 61 has a shape in which the vicinity of the upper end and the vicinity of the lower end are curved inward (on the left side of the chainsaw 2). The outer guide plate 62 has a shape in which the vicinity of the upper end and the vicinity of the lower end are curved outward (on the right side of the chainsaw 2). The guide bar 6 is formed with an elongated hole 6a along the longitudinal direction of the guide bar 6. The guide bar 6 is supported by the main body housing 22 via a support pin 64 and a support bolt 66 that penetrate the elongated hole 6a. As shown in FIG. 2, a nut 68 fastened from the outside of the sprocket cover 20 and the outer guide plate 62 is attached to the support bolt 66. The user adjusts the tension of the saw chain 8 by changing the distance between the guide bar 6 and the sprocket 56 by sliding the guide bar 6 along the elongated hole 6a with the nut 68 loosened. Can be done.

As shown in FIG. 5, the guide bar 6 is formed with an engaging hole 67 that engages with the engaging claw 65. As shown in FIG. 6, the engaging claw 65 is connected to the adjusting screw 70 via a rotation linear motion conversion mechanism 69. The rotary linear motion conversion mechanism 69 converts the rotary motion of the adjusting screw 70 into a linear motion in the direction along the elongated hole 6a of the engaging claw 65. As shown in FIG. 5, the adjusting screw 70 penetrates the elongated hole 6a without contacting the inner peripheral surface of the elongated hole 6a. When the user rotates the adjusting screw 70, the engaging claw 65 moves in the direction along the elongated hole 6a of the guide bar 6, and the guide bar 6 slides in the direction along the elongated hole 6a.

As shown in FIG. 2, the sprocket 56, the inner guide plate 61, the outer guide plate 62, and the support pin 64 are covered with the sprocket cover 20. The sprocket cover 20 is formed with a recess 20a. As shown in FIG. 4, the recess 20a is formed with a fastening opening 20b through which the support bolt 66 penetrates and an adjusting opening 20c for accessing the adjusting screw 70 from the outside. The nut 68 is fastened to the support bolt 66 from the outside of the recess 20a. The user can tighten or loosen the nut 68 with the sprocket cover 20 attached. Further, the user can adjust the tension of the saw chain 8 by rotating the adjusting screw 70 through the adjusting opening 20c with the sprocket cover 20 attached.

As shown in FIG. 6, the hand guard 16 is connected to the brake shoe 74 via a link mechanism 72. The hand guard 16 can swing around a swing axis along the left-right direction of the chainsaw 2. The brake shoe 74 is arranged so as to surround the brake drum 60. The link mechanism 72 reduces the diameter of the brake shoe 74 when the hand guard 16 is tilted forward, and increases the diameter of the brake shoe 74 when the hand guard 16 is raised backward. When the diameter of the brake shoe 74 is reduced, the inner peripheral surface of the brake shoe 74 and the outer peripheral surface of the brake drum 60 come into contact with each other, and the frictional force between the two brakes the rotation of the output shaft 50.

Lubricating oil for lubricating the saw chain 8 is stored in the oil tank 36 shown in FIG. The oil tank 36 is provided with a removable cap 76 in a replenishment opening 36a (see FIG. 4) for replenishing the oil tank 36 with lubricating oil. As shown in FIG. 1, the cap 76 of the oil tank 36 is exposed to the outside of the left side housing 10 and is arranged on the front lower left surface of the front side main body housing 22a. In front of the cap 76 of the left housing 10, a liquid level confirmation opening 78 is formed so that the liquid level of the oil tank 36 can be visually recognized from the outside.

The oil pump 38 shown in FIG. 3 sucks out the lubricating oil inside the oil tank 36 via the introduction pipe 80 in conjunction with the rotation of the motor 34, and at the same time, the lubricating oil is directed toward the guide bar 6 via the outlet pipe 82. Is sent out. A worm gear 84 for driving the oil pump 38 is fitted in the vicinity of the left end portion of the output shaft 50 of the motor 34. As shown in FIG. 4, the worm gear 84 is arranged on the left side of the stator 44 and the cooling fan 48 and on the right side of the bearing 54.

As shown in FIG. 7, the oil pump 38 includes a bracket 86, a plunger 88, a front cap 90, a rear cap 92, and an adjusting pin 94. Inside the bracket 86, a substantially cylindrical front side internal space 96 and a substantially cylindrical rear side internal space 98 which is coaxial with the front side internal space 96 and has a diameter larger than that of the front side internal space 96 are formed. The front of the front internal space 96 is sealed by the front cap 90. An introduction port 100 communicating with the introduction pipe 80 is formed below the front internal space 96. A lead-out port 102 communicating with the lead-out pipe 82 is formed above the front internal space 96. The rear side of the rear side internal space 98 is sealed by the rear side cap 92. An upper port 104 communicating with the outside is formed above the rear side of the rear side internal space 98, and a lower port 106 communicating with the outside is formed below the rear side of the rear side internal space 98. Further, an opening 108 is formed in the front lower part of the rear side internal space 98.

The adjusting pin 94 is arranged so as to penetrate the upper port 104, the rear internal space 98, and the lower port 106. As shown in FIG. 8, a tool groove 94a is formed on the upper end surface of the adjusting pin 94. The adjusting pin 94 is urged upward by a coil spring 110 arranged above the upper port 104. A positioning pin 112 is inserted through the adjusting pin 94 below the lower port 106. The positioning pin 112 is in contact with the seat surface 106a formed around the lower port 106. The seat surface 106a is formed so that the position in the vertical direction in contact with the positioning pin 112 changes according to the rotation angle of the adjusting pin 94. As shown in FIG. 7, a protrusion 94b is formed on the adjustment pin 94. The protrusion 94b is arranged inside the rear internal space 98. The protrusion 94b has a shape that is rotationally symmetric with respect to the axis of the adjustment pin 94.

As shown in FIGS. 7 and 9, the plunger 88 corresponds to a substantially cylindrical small diameter portion 114 corresponding to the front internal space 96, a threaded portion 116 having a screw formed on the outer surface, and a rear internal space 98. It has a substantially cylindrical large-diameter portion 118. The small diameter portion 114 contains a notch 114a for communicating the introduction port 100 or the outlet port 102 with the front internal space 96, and a seal 120 for sealing the front internal space 96 from the rear internal space 98. The accommodating portion 114b is formed. The screw of the screw portion 116 is formed in a shape that meshes with the worm gear 84. The rear end surface 118a of the large diameter portion 118 forms a plane inclined with respect to the axis of the plunger 88.

As shown in FIG. 7, in the plunger 88, the small diameter portion 114 is arranged from the front side internal space 96 to the rear side internal space 98, and the screw portion 116 and the large diameter portion 118 are arranged in the rear side internal space 98. The threaded portion 116 of the plunger 88 meshes with the worm gear 84 through the opening 108. Further, the threaded portion 116 of the plunger 88 is urged rearward by the coil spring 122 in the rear side internal space 98. The rear end surface 118a of the large diameter portion 118 of the plunger 88 is in contact with the protrusion 94b of the adjustment pin 94.

The operation of the oil pump 38 will be described. When the output shaft 50 of the motor 34 rotates, the screw portion 116 rotates with the rotation of the worm gear 84, and the plunger 88 rotates around the axis. Since the rear end surface 118a of the large diameter portion 118 of the plunger 88 forms a plane inclined with respect to the axis of the plunger 88, the rear end surface 118a of the large diameter portion 118 of the plunger 88 is adjusted as the plunger 88 rotates. The position of contact with the protrusion 94b of the pin 94 changes, and the plunger 88 moves back and forth in the front-rear direction. In the oil pump 38, the notch 114a faces the introduction port 100 at the timing when the plunger 88 retracts, and the lubricating oil is sucked into the front internal space 96 from the introduction port 100, and the notch 114a is at the timing when the plunger 88 advances. Discharges lubricating oil from the front internal space 96 to the outlet port 102 so as to face the outlet port 102.

In the oil pump 38, when the user inserts a tool into the tool groove 94a and rotates the adjusting pin 94, the position where the positioning pin 112 comes into contact with the seat surface 106a changes, and the vertical position of the adjusting pin 94 changes. .. When the vertical position of the adjusting pin 94 changes, the vertical position of the protrusion 94b in the rear internal space 98 changes, and the amount of movement when the plunger 88 moves forward and backward changes. For example, when the protrusion 94b is located near the axis of the plunger 88 in the vertical direction, the amount of movement when the plunger 88 moves forward and backward is small. On the contrary, when the protrusion 94b is located far from the axis of the plunger 88 in the vertical direction, the amount of movement when the plunger 88 moves forward and backward increases. When the amount of movement when the plunger 88 moves forward and backward changes, the amount of lubricating oil supplied from the oil tank 36 to the guide bar 6 changes. That is, the user can adjust the discharge amount of the lubricating oil supplied from the oil tank 36 to the guide bar 6 by rotating the adjusting pin 94.

As shown in FIG. 10, an adjustment opening 124 is formed on the upper surface of the main body housing 22 so that a user can insert a tool into the tool groove 94a of the adjustment pin 94. The adjusting opening 124 is arranged on the left side of the top handle 24 in the left-right direction of the chainsaw 2. With respect to the front-rear direction of the chainsaw 2, the adjusting opening 124 is arranged between the connection point of the side handle 14 to the top handle 24 and the connection point of the side handle 14 to the main body housing 22. By providing the adjusting opening 124 in such a place, the user can easily insert the tool into the tool groove 94a of the adjusting pin 94, and it is possible to easily adjust the discharge amount of the lubricating oil. In the chainsaw 2 of this embodiment, the discharge amount adjusting mechanism 126 is configured by the adjusting pin 94 and the adjusting opening 124.

The adjusting opening 124 may be provided in a place other than the above. For example, the adjusting opening 124 may be provided on the left side surface of the main body housing 22. Alternatively, the adjusting opening 124 may be provided on the right side surface of the main body housing 22, the front surface of the main body housing 22, or the rear surface of the main body housing 22. When the adjusting opening 124 is provided on the upper surface, the left side surface, or the rear surface of the main body housing 22, it is possible to prevent dust scattered during the cutting operation by the chainsaw 2 from entering the adjusting opening 124.

In the chainsaw 2 of this embodiment, the oil pump 38 is arranged on the left side of the motor 34. Therefore, as compared with the case where the oil pump 38 is arranged on the right side of the motor 34, the number of parts accommodated in the space on the right side of the motor 34 can be reduced inside the main body housing 22.

Further, in the chainsaw 2 of the present embodiment, the sprocket 56 is directly connected to the output shaft 50 of the motor 34 without using a mechanism such as a gear or a clutch. Therefore, the sprocket 56 can be arranged closer to the center of the main body housing 22 as compared with the case where the sprocket 56 is connected to the output shaft 50 of the motor 34 via a mechanism such as a gear or a clutch.

As shown in FIG. 10, in the chainsaw 2 of the present embodiment, when the chainsaw 2 is viewed from above in a plan view, the distance from the right end surface of the top handle 24 to the center line of the guide bar 6 is L1, and the center of the guide bar 6 is set. When the distance from the wire to the right end surface of the sprocket cover 20 is L2, the relationship is L1 / (L1 + L2) ≤ 0.3. According to such a configuration, the top handle 24 and the guide bar 6 are arranged relatively close to each other in the left-right direction of the chainsaw 2. Therefore, when the user grips the top handle 24 with his / her right hand, the saw chain 8 It is possible to intuitively grasp the cutting position by the saw chain. Further, according to such a configuration, the center of gravity of the guide bar 6 is located close to the top handle 24 and the position close to the center of gravity G of the chainsaw 2 in the left-right direction of the chainsaw 2. Therefore, even when different types of guide bars 6 are attached, it is possible to prevent the position of the center of gravity G of the chainsaw 2 from changing in the left-right direction of the chainsaw 2. In the chainsaw 2 of this embodiment, the distance L1 + L2 from the right end surface of the top handle 24 to the right end surface of the sprocket cover 20 is secured to be 30 mm or more.

In the chainsaw 2 of the present embodiment, when the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the distance L3 from the center line in the left-right direction of the top handle 24 to the left end surface of the top handle 24 is doubled. From the range (preferably 1.5 times the range (more preferably 1.2 times the range)), the distance L4 from the center line in the left-right direction of the top handle 24 to the right end surface of the top handle 24 is doubled (preferably the range L4). The center of gravity G of the chainsaw 2 is arranged within a range of preferably 1.5 times (more preferably 1.2 times). With such a configuration, when the user holds the chainsaw 2 by grasping the top handle 24 with his right hand, the chainsaw 2 is less likely to tilt to the left or right. The workability of the cutting work using the chainsaw 2 can be improved.

In the chainsaw 2 of the present embodiment, when the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the distance L5 from the center line in the left-right direction of the battery B to the left end surface of the battery B is multiplied by 1.2. From the range (preferably 1.1 times (more preferably 1 times)), the distance L6 from the center line in the left-right direction of the battery B to the right end surface of the battery B is multiplied by 1.2 (preferably). The main body housing 22, the top handle 24 and the guide bar 6 are arranged up to 1.1 times (more preferably 1 times the range)), and the motor 34 and the oil housed in the main body housing 22 are arranged. The tank 36, the oil pump 38, the control unit 40, and the like are also arranged within the above range. With such a configuration, the dimensions of the main body housing 22 in the left-right direction can be reduced.

As shown in FIG. 2, in the chainsaw 2 of the present embodiment, when the chainsaw 2 is mounted on the mounting surface P, the position of the center of gravity G of the chainsaw 2 is behind the trigger switch 30 in the front-rear direction and the vertical direction. It is located within a range of 15 ° in the front-rear direction (preferably within a range of 10 ° in the front-rear direction (more preferably in a range of 5 ° in the front-rear direction)) from a line extending vertically downward from the uppermost portion of the lower surface of the top handle 24. When the user holds the chainsaw 2 by grasping the top handle 24 with his right hand, the trigger switch 30 is operated by the index finger. Therefore, the middle finger F is placed on the uppermost portion of the lower surface of the top handle 24 behind the trigger switch 30 to operate the chainsaw. Will hold 2. In the chainsaw 2 of the present embodiment, since the center of gravity G of the chainsaw 2 is located within the above range in the front-rear direction and the up-down direction, the middle finger F is applied to the uppermost portion of the lower surface of the top handle 24 behind the trigger switch 30. Even when the chainsaw 2 is held, the balance of the chainsaw 2 in the front-rear direction can be maintained.

As described above, the chainsaw 2 according to the embodiment includes a motor 34 that rotates the saw chain 8 around the guide bar 6, a control unit 40 that controls the voltage applied to the motor 34, and the motor 34 and the control unit 40. It is provided with a main body housing 22 for accommodating the main body housing 22, a battery B detachably attached to the main body housing 22, and a top handle 24 provided on the upper part of the main body housing 22. As shown in FIG. 3, the control unit 40 is arranged above the battery B. When the chainsaw 2 is viewed from the rear with the chainsaw 2 mounted, the battery B and the control unit 40 do not overlap. When the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the battery B and the control unit 40 are at least partially overlapped with each other. According to the above configuration, the dimensions of the main body housing 22 in the front-rear direction can be further reduced as compared with the case where the control unit 40 and the battery B are arranged so as to be displaced in the front-rear direction so as not to overlap each other.

In the chainsaw 2 according to the embodiment, the hand rest 22d is formed in the vicinity of the portion of the main body housing 22 where the rear end of the top handle 24 is connected to the main body housing 22. The control unit 40 is arranged inside the hand rest 22d. According to the above configuration, the convenience of the user is improved by forming the hand rest 22d in the vicinity of the portion of the main body housing 22 where the rear end of the top handle 24 is connected to the main body housing 22. Can be done. Further, according to the above configuration, by arranging the control unit 40 in the space inside the hand rest 22d of the main body housing 22, the space inside the hand rest 22d can be effectively utilized, and the main body housing 22 can be used. The dimensions can be made smaller.

In the chainsaw 2 according to the embodiment, the top handle 24 and the battery B do not overlap when the chainsaw 2 is viewed from the rear with the chainsaw 2 mounted. When the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the top handle 24 and the battery B are at least partially overlapped with each other. According to the above configuration, the control unit 40 is arranged in the space between the top handle 24 and the battery B inside the main body housing 22. According to the above configuration, the dimensions of the main body housing 22 in the front-rear direction can be further reduced as compared with the case where the top handle 24 and the battery B are arranged so as to be displaced in the front-rear direction so as not to overlap each other.

In the chainsaw 2 according to one embodiment, the battery B can be attached to and detached from the main body housing 22 by sliding it in the left-right direction. According to the above configuration, the dimensions of the main body housing 22 in the front-rear direction can be further reduced as compared with the case where the battery B is slid in the front-rear direction with respect to the main body housing 22 to be attached and detached.

The chainsaw 2 according to the embodiment includes a motor 34 that rotates the saw chain 8 around a guide bar 6, a control unit 40 that controls the voltage applied to the motor 34, and a main body housing that houses the motor 34 and the control unit 40. It includes a 22, a battery B detachably attached to the main body housing 22, and a top handle 24 provided on the upper part of the main body housing 22. As shown in FIG. 3, when the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the motor 34 and the battery B do not overlap, and the motor 34 and the control unit 40 do not overlap. As shown in FIGS. 3 and 10, when the chainsaw 2 is viewed from the rear with the chainsaw 2 mounted, the motor 34 and the battery B are at least partially overlapped with each other, and the motor 34 and the control unit 40 are in contact with each other. At least partially overlap. In the chainsaw 2 equipped with the motor 34, in many cases, the motor 34 is arranged so that its output shaft 50 is aligned in the left-right direction of the chainsaw 2. In this case, if the battery B or the control unit 40 is arranged above or below the motor 34 inside the main body housing 22, the vertical dimension of the main body housing 22 becomes large. According to the above configuration, since the battery B and the control unit 40 are not arranged above or below the motor 34 inside the main body housing 22, the vertical dimensions of the main body housing 22 can be further reduced. .. Further, according to the above configuration, when the chainsaw 2 is viewed from the rear, the motor 34 and the battery B are at least partially overlapped with each other, and the motor 34 and the control unit 40 are at least partially overlapped with each other. The dimensions of the housing 22 in the left-right direction can also be reduced.

In the chainsaw 2 according to one embodiment, the battery B and the control unit 40 are arranged behind the motor 34. According to the above configuration, the battery B can be attached / detached behind the main body housing 22 which is located away from the guide bar 6, and the user can easily attach / detach the battery B. Further, according to the above configuration, since both the battery B and the control unit 40 are arranged behind the motor 34, the dimensions of the main body housing 22 in the front-rear direction can be further reduced.

In the chainsaw 2 according to the embodiment, as shown in FIG. 10, when the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the width in the left-right direction of the battery B from the center line in the left-right direction of the battery B. The motor 34 is arranged within a range of 1.2 times that of. According to the above configuration, the dimensions of the main body housing 22 in the left-right direction can be further reduced as compared with the case where the battery B and the motor 34 are arranged with a large offset in the left-right direction of the chainsaw 2.

As shown in FIG. 3, the chainsaw 2 according to the embodiment includes a motor 34 that rotates the saw chain 8 around a guide bar 6 and an oil that supplies lubricating oil to the saw chain 8 in conjunction with the rotation of the motor 34. It includes a pump 38 and a main body housing 22 that houses a motor 34 and an oil pump 38. As shown in FIG. 8, the chainsaw 2 includes a discharge amount adjusting mechanism 126 including an adjustment pin 94 (an example of an adjustment member) for adjusting the discharge amount of lubricating oil in the oil pump 38. The discharge amount adjusting mechanism 126 is arranged on the surface of the main body housing 22 that is exposed to the outside when the chainsaw 2 is placed. According to the above configuration, since the discharge amount adjusting mechanism 126 is arranged on the surface of the main body housing 22 that is exposed to the outside when the chainsaw 2 is placed, it is used when adjusting the discharge amount of the lubricating oil. The person can operate the adjustment pin 94 with the chainsaw 2 mounted on the chain saw 2. The work of adjusting the discharge amount of the lubricating oil can be easily performed.

The chainsaw 2 according to one embodiment further includes a top handle 24 provided on the upper part of the main body housing 22. The discharge amount adjusting mechanism 126 is arranged on the left side of the top handle 24. According to the above configuration, when adjusting the discharge amount of the lubricating oil, the user can operate the adjusting pin 94 with the left hand even when the top handle 24 is held by the right hand and the chainsaw 2 is held. The work of adjusting the discharge amount of the lubricating oil can be easily performed.

In the chainsaw 2 according to one embodiment, the oil pump 38 is arranged on the left side of the motor 34. If the oil pump 38 is arranged on the right side of the motor 34 and the discharge amount adjusting mechanism 126 is arranged on the left side of the top handle 24, the discharge amount adjusting mechanism 126 needs to have a complicated configuration. According to the above configuration, since the oil pump 38 is arranged on the left side of the motor 34 and the discharge amount adjusting mechanism 126 is arranged on the left side of the top handle 24, the discharge amount adjusting mechanism 126 has a simple structure. can do.

The chainsaw 2 according to one embodiment further includes a side handle 14 provided on the left side of the main body housing 22. The discharge amount adjusting mechanism 126 is arranged behind the front end of the side handle 14. According to the above configuration, the side handle 14 does not get in the way when the user operates the adjustment pin 94. The work of adjusting the discharge amount of the lubricating oil can be performed more easily.

In the chainsaw 2 according to the embodiment, the discharge amount adjusting mechanism 126 is arranged on the upper surface of the main body housing 22. According to the above configuration, the user can visually recognize the adjustment pin 94 without bending over or lifting the chainsaw 2 to the height of the line of sight. Therefore, the user can more easily operate the adjustment pin 94.

In the chainsaw 2 according to one embodiment, the adjusting pin 94 is arranged inside the main body housing 22. The discharge amount adjusting mechanism 126 is formed in the main body housing 22, and further includes an adjusting opening 124 through which a tool for operating the adjusting pin 94 can pass. According to the above configuration, since the adjusting pin 94 is arranged inside the main body housing 22, it is possible to prevent the adjusting pin 94 from being erroneously operated.

The chainsaw 2 according to one embodiment houses a motor 34 (an example of a prime mover) that rotates the saw chain 8 around a guide bar 6, a sprocket 56 that transmits the rotation of the motor 34 to the saw chain 8, and a motor 34. It includes a main body housing 22, a sprocket cover 20 that covers the sprocket 56, and a top handle 24 provided above the main body housing 22. As shown in FIG. 10, when the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the right end surface of the top handle 24 has a distance L1 from the right end surface of the top handle 24 to the center line of the guide bar 6. The ratio of the distance from the sprocket cover 20 to the right end surface of the sprocket cover 20 to the distance L1 + L2 is 0.3 or less. According to the above configuration, the top handle 24 and the guide bar 6 are arranged relatively close to each other in the left-right direction, so that when the user grips the top handle 24, the cutting position by the saw chain 8 is intuitive. It can be easily grasped. Further, according to the above configuration, the center of gravity of the guide bar 6 is located close to the top handle 24 and the position close to the center of gravity G of the chainsaw 2 in the left-right direction of the chainsaw 2. Therefore, even when different types of guide bars 6 are attached, it is possible to prevent the position of the center of gravity G of the chainsaw 2 from changing in the left-right direction of the chainsaw 2.

In the chainsaw 2 according to the embodiment, when the chainsaw 2 is viewed from above with the chainsaw 2 mounted, the range from the center line in the left-right direction of the top handle 24 to twice the width in the left-right direction of the top handle 24. The center of gravity G of the chainsaw 2 is arranged inside. According to the above configuration, when the user holds the chainsaw 2 by grasping the top handle 24 with his right hand, the chainsaw 2 is less likely to tilt to the left or right. The workability of the cutting work using the chainsaw 2 can be improved.

In the chainsaw 2 according to one embodiment, the motor 34 is the prime mover for rotating the saw chain 8 around the guide bar 6. Since the structure of the motor 34 is simpler than that of other prime movers such as an engine, it is easy to specify the position of the center of gravity when designing the chainsaw 2, and it is easy to adjust the mounting position inside the main body housing 22. According to the above configuration, by balancing the weight of the guide bar 6 and the weight of the motor 34, the center of gravity G of the chainsaw 2 can be arranged in the vicinity of the top handle 24 in the left-right direction of the chainsaw 2.

The chainsaw 2 according to the embodiment further includes a battery B detachably attached to the main body housing 22. When power is supplied by the battery B, unlike the case where the power is supplied by the power cord, the battery B attached to the main body housing 22 can be used as a heavy object for adjusting the position of the center of gravity of the chainsaw 2. According to the above configuration, by balancing the weight of the guide bar 6, the weight of the motor 34, and the weight of the battery B, the center of gravity of the chainsaw 2 is arranged in the vicinity of the top handle 24 in the left-right direction of the chainsaw 2. can do.

The chainsaw 2 according to the embodiment may be configured to be detachable by sliding the battery B in the front-rear direction to the battery mounting portion 22c of the main body housing 22.

In the chainsaw 2 according to the embodiment, the battery mounting portion 22c of the main body housing 22 may be provided on the front surface, the rear surface, the left side surface, the right side surface, or the upper surface of the main body housing 22. In this case, the sliding direction when the battery B is attached / detached may be an arbitrary direction along the battery mounting portion 22c, for example, a vertical direction, a horizontal direction, or a front-rear direction.

In the chainsaw 2 according to the embodiment, in the discharge amount adjusting mechanism 126, the adjusting pin 94 penetrates the adjusting opening 124 and protrudes to the outside of the main body housing 22, and the tool groove 94a is arranged outside the main body housing 22. You may be. Alternatively, the discharge amount adjusting mechanism 126 may include a lever or dial exposed to the outside of the main body housing 22, and the lever or dial may be mechanically connected to the adjusting pin 94 via the adjusting opening 124. ..

The chainsaw 2 according to the embodiment may be supplied with electric power via a power cord without attaching the battery B.

The chainsaw 2 according to the embodiment may include an engine instead of the motor 34 as a prime mover for rotating the sprocket 56. In this case, the output shaft 50 connected to the sprocket 56 may be rotated by driving the engine.

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of claims. The techniques described in the claims include various modifications and modifications of the specific examples illustrated above. The technical elements described herein or in the drawings exhibit their technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques illustrated in the present specification or drawings can achieve a plurality of purposes at the same time, and achieving one of the purposes itself has technical usefulness.

2: Chain saw 4: Main body 6: Guide bar 6a: Long hole 8: Saw chain 10: Left side housing 12: Right side housing 14: Side handle 16: Hand guard 18: Brake cover 20: Sprocket cover 20a: Recess 20b: Fastening opening 20c: Adjustment opening 22: Main body housing 22a: Front main body housing 22b: Rear main body housing 22c: Battery mounting part 22d: Hand rest 24: Top handle 24a: Support part 24b: Grip part 24c: Recessed part 26: Power switch 28: Power lamp 30: Trigger switch 32: Trigger lock lever 34: Motor 36: Oil tank 36a: Replenishment opening 38: Oil pump 40: Control unit 42: Coil 44: Stator 46: Rotor 48: Cooling fan 50: Output shaft 52: Bearing 54: Bearing 56: Sprocket 58: Brake base 60: Brake drum 61: Inner guide plate 62: Outer guide plate 64: Support pin 65: Engagement claw 66: Support bolt 67: Engagement hole 68: Nut 69: Rotation straight Dynamic conversion mechanism 70: Adjusting screw 72: Link mechanism 74: Brake shoe 76: Cap 78: Liquid level confirmation opening 80: Introduction pipe 82: Outlet pipe 84: Warm gear 86: Bracket 88: Plunger 90: Front cap 92: Rear side Cap 94: Adjustment pin 94a: Tool groove 94b: Protrusion 96: Front internal space 98: Rear internal space 100: Introductory port 102: Derivation port 104: Upper port 106: Lower port 106a: Seat surface 108: Opening 110: Coil spring 112: Positioning pin 114: Small diameter portion 114a: Notch 114b: Seal accommodating portion 116: Threaded portion 118: Large diameter portion 118a: Rear end surface 120: Seal 122: Coil spring 124: Adjustment opening 126: Discharge amount adjustment mechanism

Claims (4)

A motor that rotates the saw chain around the guide bar,
A control unit that controls the voltage applied to the motor and
A main body housing that houses the motor and the control unit,
A battery detachably attached to the main body housing and
A chainsaw having a top handle provided above the main body housing.
The control unit is located above the battery and
When the chainsaw is viewed from the rear with the chainsaw mounted, the battery and the control unit do not overlap.
When the chainsaw is viewed from above with the chainsaw mounted, the battery and the control unit are at least partially overlapped .
A chainsaw in which the motor and the battery do not overlap when the chainsaw is viewed from above with the chainsaw mounted . A hand rest is formed in the vicinity of a portion of the main body housing where the rear end of the top handle connects to the main body housing.
The chainsaw according to claim 1, wherein the control unit is arranged inside the hand rest. When the chainsaw is viewed from the rear with the chainsaw mounted, the top handle and the battery do not overlap.
The chainsaw according to claim 1 or 2, wherein the top handle and the battery are at least partially overlapped when the chainsaw is viewed from above with the chainsaw mounted. The chainsaw according to any one of claims 1 to 3, wherein the battery can be attached to and detached from the main body housing by sliding it in the left-right direction.

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