JP2019072897A - Chain saw - Google Patents

Abstract

To provide a technology that enables further downsizing of a dimension of a body housing.SOLUTION: The specification discloses a chain saw. The chain saw includes: a motor which causes a saw chain to rotate around a guide bar; a control unit which controls an applied voltage to the motor; a body housing which houses the motor and the control unit; a battery detachably attached to the body housing; and a top handle provided at an upper part of the body housing. In a state where the chain saw is placed, the motor and the battery do not overlap and the motor and the control unit do not overlap when the chain saw is viewed from above. In the state where the chain saw is placed, the motor and the battery at least partially overlap and the motor and the control unit at least partially overlap when the chain saw is viewed from a rear side.SELECTED DRAWING: Figure 3

Description

  The technology disclosed herein relates to a chain saw.

  Patent Document 1 discloses a chain saw. The chain saw includes a motor for rotating the saw chain around the guide bar, a control unit for controlling a voltage applied to the motor, a body housing for accommodating the motor and the control unit, and a battery removably mounted on the body housing And a top handle provided above the main body housing.

JP, 2014-37080, A

  In the prior art chain saw, there is room for improvement in the layout of parts inside the body housing, and the size of the body housing has become large. The present specification provides a technology capable of further reducing the size of the main body housing.

  This specification discloses a chain saw. The chain saw includes a motor for rotating the saw chain around the guide bar, a control unit for controlling a voltage applied to the motor, a main housing housing the motor and the control unit, and a battery removably mounted on the main housing. , A top handle provided on the top of the main body housing. When the chain saw is mounted and the chain saw is viewed from above, the motor and the battery do not overlap, and the motor and the control unit do not overlap. When the chain saw is mounted, when the chain saw is viewed from the rear, the motor and the battery at least partially overlap, and the motor and the control unit at least partially overlap.

  In a chain saw equipped with a motor, the motor is often arranged such that its output shaft is along the left-right direction of the chain saw. In this case, if the battery or the control unit is disposed above or below the motor inside the body housing, the size of the body housing in the vertical direction becomes large. According to the above configuration, since the battery and the control unit are not disposed above or below the motor inside the main housing, the size of the main housing in the vertical direction can be further reduced. Further, according to the above configuration, when the chain saw is viewed from the rear, the motor and the battery overlap at least partially, and the motor and the control unit overlap at least partially. The dimensions can also be miniaturized.

It is a perspective view of chain saw 2 of an example. It is a right side view of chain saw 2 of an example. FIG. 3 is a left side view of the example chain saw 2 with the side handle 14 and the left housing 10 removed. It is a cross-sectional view of motor 34 vicinity of the chain saw 2 of an Example. It is a right side view in the state where sprocket cover 20 was removed about chain saw 2 of an example. It is a right side view in the state where sprocket cover 20, guide bar 6, and brake cover 18 were removed about chain saw 2 of an example. It is a longitudinal cross-sectional view of oil pump 38 of chain saw 2 of an example. It is a perspective view of oil pump 38 of chain saw 2 of an example. It is a perspective view of plunger 88 of chain saw 2 of an example. It is a top view of chain saw 2 of an example.

  In one or more embodiments, the chain saw includes a motor that rotates the saw chain around the 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 The battery may be provided with a battery removably attached to the housing, and a top handle provided on the top of the main body housing. The control unit may be located above the battery. When the chain saw is mounted, the battery and the control unit may not overlap when the chain saw is viewed from the rear. With the chain saw placed, the battery and the control unit may at least partially overlap when the chain saw is viewed from above.

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

  In one or more embodiments, a hand rest may be formed in the body housing near where the rear end of the top handle 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 point where the rear end of the top handle of the main body housing is connected to the main body housing. Further, according to the above configuration, by arranging the control unit in the space inside the handrest of the main body housing, the space inside the handrest can be effectively used, and the size of the main body housing can be further miniaturized. can do.

  In one or more embodiments, with the chainsaw in place, the top handle and battery may not overlap when the chainsaw is viewed from the rear. With the chain saw placed, the top handle and the battery may at least partially overlap when the chain saw is viewed from above.

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

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

  According to the above configuration, the dimension in the front-rear direction of the main body housing 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 make the battery removable.

  In one or more embodiments, the chain saw includes a motor that rotates the saw chain around the 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 The battery may be provided with a battery removably attached to the housing, and a top handle provided on the top of the main body housing. When the chain saw is mounted, when the chain saw is viewed from above, the motor and the battery may not overlap, and the motor and the control unit may not overlap. When the chain saw is mounted, when the chain saw is viewed from the rear, the motor and the battery may at least partially overlap, and the motor and the control unit may at least partially overlap.

  In a chain saw equipped with a motor, the motor is often arranged such that its output shaft is along the left-right direction of the chain saw. In this case, if the battery or the control unit is disposed above or below the motor inside the body housing, the size of the body housing in the vertical direction becomes large. According to the above configuration, since the battery and the control unit are not disposed above or below the motor inside the main housing, the size of the main housing in the vertical direction can be further reduced. Further, according to the above configuration, when the chain saw is viewed from the rear, the motor and the battery overlap at least partially, and the motor and the control unit overlap at least partially. The dimensions can also be miniaturized.

  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 and detached in the rear of the main body housing at a position away from the guide bar, and the battery attachment and detachment work of the user can be facilitated. Further, according to the above configuration, since both the battery and the control unit are disposed rearward of the motor, the dimension in the front-rear direction of the main body housing can be further reduced.

  In one or more embodiments, when the chain saw is mounted, when viewed from above, within 1.2 times the width of the battery in the lateral direction from the center line of the battery in the lateral direction, A motor may be arranged.

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

  In one or more embodiments, the chain saw includes a motor that rotates the saw chain around the guide bar, an oil pump that supplies lubricating oil to the saw chain in conjunction with the rotation of the motor, the motor and the oil pump You may provide the main body housing which accommodates. The chain saw may further include a discharge amount adjustment mechanism including an adjustment member for adjusting the discharge amount of the lubricating oil in the oil pump. The discharge amount adjustment mechanism may be disposed on the surface of the main body housing exposed to the outside when the chain saw is placed.

  According to the above configuration, the discharge amount adjustment mechanism is disposed on the surface of the main body housing exposed to the outside when the chain saw is mounted. Therefore, when adjusting the discharge amount of the lubricating oil, the user can The adjustment member can be operated in a state in which is placed. The operation of adjusting the discharge amount of lubricating oil can be easily performed.

  In one or more embodiments, the chain saw may further comprise a top handle provided on the top of the body housing. The discharge amount adjustment mechanism may be disposed 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 adjustment member with the left hand even in a state in which the top handle is held with the right hand and the chain saw is held. The operation of adjusting the discharge amount of lubricating oil can be easily performed.

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

  If the oil pump is disposed on the right side of the motor, if the discharge amount adjustment mechanism is disposed on the left side of the top handle, the discharge amount adjustment mechanism needs to have a complicated structure. According to the above configuration, since the oil pump is disposed on the left side of the motor and the discharge amount adjustment mechanism is disposed on the left side of the top handle, the discharge amount adjustment mechanism can be made into a simple structure.

  In one or more embodiments, the chain saw may further comprise a side handle provided on the left side of the body housing. The discharge amount adjustment mechanism may be disposed rearward of 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 adjustment member. The operation of adjusting the discharge amount of lubricating oil can be performed more easily.

  In one or more embodiments, the displacement adjustment mechanism may be disposed on the top surface of the body housing.

  According to the above configuration, the user can visually recognize the adjustment member without bending the body or raising the chain saw to the height of the eyes. Therefore, the user can more easily perform the operation of operating the adjustment member.

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

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

  In one or more embodiments, a chain saw includes a motor that rotates the saw chain around a guide bar, a sprocket that transmits the rotation of the motor to the saw chain, a body housing that houses the motor, and a sprocket that covers the sprockets. A cover and a top handle provided above the main body housing may be provided. 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 when the chain saw is viewed from above with the chain saw mounted is It may be 0.3 or less.

  According to the above configuration, the top handle and the guide bar are disposed relatively close to each other in the left-right direction, so 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 closer to the top handle and closer to the center of gravity of the chain saw in the left-right direction of the chain saw. For this reason, even when different types of guide bars are attached, it is possible to suppress a change in the position of the center of gravity of the chain saw in the left-right direction of the chain saw.

  In one or more embodiments, when the chain saw is mounted, when viewed from above, within a range from the center line of the top handle in the lateral direction to twice the lateral width of the top handle, The center of gravity of the chain saw may be arranged.

  According to the above configuration, when the user grips the top handle with the right hand and holds the chain saw, the chain saw is less likely to tilt to the left and right. The workability of the cutting operation using a chain saw can be improved.

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

  Since the motor is simple in structure as compared to other prime movers such as an engine, when designing a chain saw, it is easy to specify the position of the center of gravity and 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 chain saw can be arranged in the vicinity of the top handle in the left-right direction of the chain saw.

  In one or more embodiments, the chain saw may further comprise a battery removably attached to the body housing.

  Unlike when power is supplied by a power cord, when power is supplied by a battery, the battery attached to the body housing can be used as a weight for adjusting the position of the center of gravity of the chain saw. 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 chain saw can be arranged in the vicinity of the top handle in the left-right direction of the chain saw.

(Example)
As shown in FIG. 1, the chain saw 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-like member attached to the main body 4 so as to protrude forward from the main body 4. The saw chain 8 includes a plurality of cutters connected to one another, and is attached along the periphery of the guide bar 6. A battery B is attached to the main body 4. The chain saw 2 cuts the workpiece such as wood by rotationally driving the saw chain 8 along the periphery of the guide bar 6 by the power supplied from the battery B. In the following description, when the chain saw 2 is placed on the placement surface P (see FIG. 2) such as the ground, the direction perpendicular to the placement surface P is referred to as the vertical direction of the chain saw 2. The direction in which the longitudinal direction of the guide bar 6 is projected is referred to as the longitudinal direction of the chain saw 2, and the direction orthogonal to the vertical direction and the longitudinal direction of the chain saw 2 is referred to as the lateral direction of the chain saw 2. In addition, in drawings other than FIG. 1, illustration of the saw chain 8 is abbreviate | omitted for clarification of illustration.

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

  The main housing 22 includes a substantially rectangular front main housing 22a having a longitudinal direction in the front-rear direction of the main body 4, and a rear main housing 22b extending rearward from the rear upper portion of the front main housing 22a. On the lower surface of the rear main body housing 22b, a battery attachment portion 22c is formed, to which the battery B can be attached and detached by sliding the battery B in the lateral direction. As shown in FIG. 2, when the chain saw 2 is mounted on the mounting surface P with the battery B attached to the chain saw 2, the lower surface of the front main housing 22 a abuts on the mounting surface P and the battery B The lower surface of the support also abuts on the mounting surface P.

  As shown in FIG. 1, the top handle 24 extends substantially rearward from a rear upper portion of the support portion 24a, and a substantially prismatic support portion 24a protruding upward from the front upper surface of the front main body housing 22a. It has a gripping portion 24b which is curved downward and connected to the upper surface of the rear main body housing 22b and has a substantially circular cross section. 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 on / off the power supply of the chain saw 2 and a power lamp 28 for displaying the power on / off state of the chain saw 2 are arranged. A trigger switch 30 for a user to operate the rotational drive of the saw chain 8 is disposed on the lower front surface of the grip portion 24b. A trigger lock lever 32 that switches between a state in which the user operates the trigger switch 30 and a state in which the user operates the trigger switch 30 is disposed on the upper portion of the grip portion 24b.

  The side handle 14 has a substantially U-shaped outer shape connecting between the upper rear left surface of the support portion 24 a of the top handle 24 and the lower rear left surface of the front main body housing 22 a. The cross-sectional shape of the side handle 14 is substantially circular. When using the chain saw 2, the user holds the top handle 24 with the right hand, holds the side handle 14 with the left hand, and holds the chain saw 2. From this state, when the user depresses 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 the trigger switch 30 with the index finger of the right hand Thus, the saw chain 8 is rotationally driven. A hand rest 22d on which the user can place a 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 disposed inside the front main body housing 22a. Further, a control unit 40 is disposed inside the rear main body housing 22b. The oil tank 36 is disposed forward 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 passes through the stator 44 around which the coil 42 is wound, the rotor 46 disposed outside the stator 44, the cooling fan 48 fitted to the rotor 46, and the centers of the stator 44 and the rotor 46. And an output shaft 50 fitted to a 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 incorporates an inverter circuit having switching elements 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 disposed along the left-right direction of the chain saw 2 and rotatably supported by the main housing 22 via bearings 52 and 54. The bearing 52 is disposed to the right of the stator 44, and the bearing 54 is disposed to the left of the stator 44 and the cooling fan 48. Near the right end of the output shaft 50, a sprocket 56 and a brake base 58 are fixed. The sprocket 56 and the brake base 58 are disposed to the right of the bearing 52. The brake drum 60 is fitted to the brake base 58.

  As shown in FIG. 5, the sprockets 56 are exposed to the outside of the right housing 12. The 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 is rotated along with the output shaft 50, whereby the saw chain 8 is rotated 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 held 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 is curved inward (the left side of the chain saw 2). The outer guide plate 62 has a shape in which the vicinity of the upper end and the vicinity of the lower end is curved outward (right side of the chain saw 2). The guide bar 6 is formed with a long hole 6 a 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 penetrating the long hole 6 a. 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 long hole 6 a with the nut 68 loosened. Can.

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

  As shown in FIG. 2, the sprocket 56, the inner guide plate 61, the outer guide plate 62, and the support pins 64 are covered by a sprocket cover 20. The sprocket cover 20 is formed with a recess 20 a. As shown in FIG. 4, the recess 20a is formed with a fastening opening 20b through which the support bolt 66 passes and an adjustment 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 20 a. The user can tighten or loosen the nut 68 with the sprocket cover 20 attached. In addition, the user can adjust the tension of the saw chain 8 by rotating the adjustment screw 70 via the adjustment opening 20 c in a state where the sprocket cover 20 is 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 chain saw 2. The brake shoe 74 is disposed to surround the brake drum 60. The link mechanism 72 reduces the diameter of the brake shoe 74 when the hand guard 16 is turned forward and expands the diameter of the brake shoe 74 when the hand guard 16 is raised rearward. When the diameter of the brake shoe 74 is reduced, the inner circumferential surface of the brake shoe 74 abuts on the outer circumferential surface of the brake drum 60, and the friction between the two brakes the rotation of the output shaft 50.

  The oil tank 36 shown in FIG. 3 stores lubricating oil for lubricating the saw chain 8. The oil tank 36 is provided with a removable cap 76 at 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 housing 10, and is disposed on the front lower left surface of the front main body housing 22a. In the front of the cap 76 of the left housing 10, there is formed a liquid level confirmation opening 78 through which 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 in the oil tank 36 via the introduction pipe 80 in conjunction with the rotation of the motor 34, and also directs the lubricating oil toward the guide bar 6 via the lead-out pipe 82. Send out Near the left end of the output shaft 50 of the motor 34, a worm gear 84 for driving the oil pump 38 is fitted. As shown in FIG. 4, the worm gear 84 is disposed to the left of the stator 44 and the cooling fan 48 and to the right 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 adjustment pin 94. Inside the bracket 86, a substantially cylindrical front internal space 96 and a substantially cylindrical rear internal space 98 coaxial with the front internal space 96 and larger in diameter than the front internal space 96 are formed. The front of the front inner space 96 is sealed by a front cap 90. Below the front inner space 96, an introduction port 100 communicating with the introduction pipe 80 is formed. Above the front inner space 96, an outlet port 102 communicating with the outlet pipe 82 is formed. The rear of the rear internal space 98 is sealed by a rear cap 92. An upper port 104 communicating with the outside is formed at the rear upper side of the rear side internal space 98, and a lower side port 106 communicating with the outside is formed at the rear lower side of the rear side internal space 98. Further, an opening 108 is formed on the front lower side of the rear inner space 98.

  The adjustment pin 94 is disposed to pass through the upper port 104, the rear internal space 98, and the lower port 106. As shown in FIG. 8, a tool groove 94 a is formed on the upper end surface of the adjustment pin 94. The adjustment pin 94 is biased upward by a coil spring 110 disposed above the upper port 104. The positioning pin 112 is inserted through the adjustment pin 94 below the lower port 106. The positioning pin 112 is in contact with a seating surface 106 a formed around the lower port 106. The seating surface 106 a is formed so that the vertical position in contact with the positioning pin 112 changes in accordance with the rotation angle of the adjustment pin 94. As shown in FIG. 7, a protrusion 94 b is formed on the adjustment pin 94. The protrusion 94 b is disposed inside the rear internal space 98. The protrusion 94 b has a rotationally symmetrical shape 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 inner space 96, a screw portion 116 having a screw formed on the outer surface, and a rear inner space 98. A substantially cylindrical large diameter portion 118 is provided. The small diameter portion 114 is a seal that accommodates a notch 114 a for communicating the introduction port 100 or the outlet port 102 with the front inner space 96 and a seal 120 for sealing the front inner space 96 from the rear inner space 98. An accommodating portion 114 b is formed. The threads of the threaded portion 116 are formed to engage with the worm gear 84. The rear end surface 118 a of the large diameter portion 118 forms a flat surface 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 disposed from the front inner space 96 to the rear inner space 98, and the screw portion 116 and the large diameter portion 118 are disposed in the rear inner space 98. The threaded portion 116 of the plunger 88 meshes with the worm gear 84 through the opening 108. In addition, the screw portion 116 of the plunger 88 is biased rearward by the coil spring 122 in the rear inner space 98. The rear end surface 118 a of the large diameter portion 118 of the plunger 88 abuts on the projection 94 b 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 threaded portion 116 rotates as the worm gear 84 rotates, and the plunger 88 rotates about its axis. Since the rear end surface 118a of the large diameter portion 118 of the plunger 88 forms a flat surface 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 at which the pin 94 abuts against the projection 94 b changes, and the plunger 88 advances and retracts 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 sucks lubricating oil from the introduction port 100 into the front inner space 96, and the notch 114a at the timing when the plunger 88 advances. The lubricating oil is discharged from the front inner space 96 to the outlet port 102 opposite to the outlet port 102.

  In the oil pump 38, when the user inserts a tool into the tool groove 94a and rotates the adjustment pin 94, the position where the positioning pin 112 abuts on the seat surface 106a changes, and the vertical position of the adjustment pin 94 changes. . When the vertical position of the adjustment pin 94 changes, the vertical position of the projection 94 b in the rear internal space 98 changes, and the amount of movement of the plunger 88 when moving back and forth in the front-rear direction changes. For example, when the projection 94 b is in a position close to the axis of the plunger 88 in the vertical direction, the amount of movement of the plunger 88 when advancing and retracting in the front-rear direction becomes small. Conversely, when the projection 94 b is at a position far from the axis of the plunger 88 in the vertical direction, the amount of movement of the plunger 88 when advancing and retracting in the front-rear direction becomes large. When the amount of movement when the plunger 88 moves back and forth changes, the amount of discharge of the 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 adjustment pin 94.

  As shown in FIG. 10, an adjustment opening 124 is formed in the upper surface of the main body housing 22 so that the user can insert a tool into the tool groove 94 a of the adjustment pin 94. The adjustment opening 124 is disposed on the left side of the top handle 24 in the left-right direction of the chain saw 2. With respect to the longitudinal direction of the chain saw 2, the adjustment opening 124 is disposed 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 body housing 22. By providing the adjustment opening 124 in such a place, the user can easily insert the tool into the tool groove 94 a of the adjustment pin 94, and the discharge amount of the lubricating oil can be easily adjusted. In the chain saw 2 of this embodiment, the discharge amount adjustment mechanism 126 is configured by the adjustment pin 94 and the adjustment opening 124.

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

  In the chain saw 2 of the present embodiment, the oil pump 38 is disposed on the left side of the motor 34. Therefore, compared with the case where the oil pump 38 is disposed on the right side of the motor 34, the number of components accommodated in the space on the right side of the motor 34 can be reduced inside the main body housing 22.

  Further, in the chain saw 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 disposed closer to the center of the main housing 22 than when 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 chain saw 2 of this embodiment, when the chain saw 2 is viewed in plan from above, the distance from the right end face 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 When the distance from the line to the right end face of the sprocket cover 20 is L2, the relationship of L1 / (L1 + L2) ≦ 0.3 is established. According to such a configuration, since the top handle 24 and the guide bar 6 are disposed relatively close to each other in the left-right direction of the chain saw 2, when the user grips the top handle 24 with the right hand, the saw chain 8 It is easy to intuitively grasp the cutting position due to Further, according to such a configuration, the center of gravity of the guide bar 6 is closer to the top handle 24 and closer to the center of gravity G of the chain saw 2 in the left-right direction of the chain saw 2. For this reason, even when different types of guide bars 6 are attached, it is possible to suppress a change in the position of the center of gravity G of the chain saw 2 in the left-right direction of the chain saw 2. In the chain saw 2 of the present embodiment, the distance L1 + L2 from the right end face of the top handle 24 to the right end face of the sprocket cover 20 is 30 mm or more.

  In the chain saw 2 of this embodiment, when the chain saw 2 is mounted, the distance L3 from the center line of the top handle 24 in the left-right direction to the left end face of the top handle 24 is doubled when the chain saw 2 is viewed from above. From the range (preferably 1.5 times (more preferably 1.2 times)), the distance L4 from the center line of the top handle 24 in the lateral direction to the right end face of the top handle 24 is doubled ( Preferably, the center of gravity G of the chain saw 2 is arranged within a range of 1.5 times (more preferably 1.2 times). With such a configuration, when the user holds the top handle 24 with the right hand and holds the chain saw 2, the chain saw 2 is less likely to tilt to the left and right. The workability of the cutting operation using the chain saw 2 can be improved.

  In the chain saw 2 of this embodiment, when the chain saw 2 is mounted, the distance L5 from the center line of the battery B in the left-right direction to the left end face of the battery B is 1.2 times A range (preferably, a distance L6 from the center line of the battery B in the left-right direction to the right end face of the battery B) of 1.2 The main housing 22, the top handle 24, and the guide bar 6 are disposed until 1.1 times (more preferably, in the range of 1), and the motor 34, oil housed in the main housing 22 is disposed. 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 size in the left-right direction of the main body housing 22 can be reduced.

  As shown in FIG. 2, in the chain saw 2 of this embodiment, when the chain saw 2 is placed on the placement surface P, the position of the center of gravity G of the chain saw 2 is behind the trigger switch 30 in the front-rear direction and the vertical direction. A line extending vertically downward from the top of the lower surface of the top handle 24 is positioned within a range of 15 ° back and forth (preferably within a range of 10 ° back and forth (more preferably within a range of 5 ° back and forth)). When the user grips the top handle 24 with the right hand to hold the chain saw 2, the middle finger F is moved to the top of the lower surface of the top handle 24 behind the trigger switch 30 to operate the trigger switch 30 with the index finger. It will hold two. In the chain saw 2 of this embodiment, since the center of gravity G of the chain saw 2 is located within the above range in the front and rear direction and the vertical direction, the middle finger F is extended from the trigger switch 30 to the top of the lower surface of the top handle 24 Even when the chain saw 2 is held, the balance in the front-rear direction of the chain saw 2 can be maintained.

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

  In the chain saw 2 according to one embodiment, a hand rest 22 d is formed in the vicinity of the point where the rear end of the top handle 24 of the main housing 22 is connected to the main housing 22. The control unit 40 is disposed inside the handrest 22d. According to the above configuration, the convenience of the user is improved by forming the hand rest 22 d in the vicinity of the portion where the rear end of the top handle 24 of the main housing 22 is connected to the main housing 22. Can. Further, according to the above configuration, by arranging the control unit 40 in the space inside the hand rest 22 d of the main body housing 22, the space inside the hand rest 22 d can be effectively used. The dimensions can be further miniaturized.

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

  In the chain saw 2 according to one embodiment, the battery B is detachable from the body housing 22 by sliding in the left-right direction. According to the above configuration, the size in the front-rear direction of the main body housing 22 can be further reduced as compared with the case where the battery B is slidable in the front-rear direction with respect to the main body housing 22 to be detachable.

  The chain saw 2 according to one embodiment includes a motor 34 for rotating the saw chain 8 around the guide bar 6, a control unit 40 for controlling an applied voltage to the motor 34, a body housing for accommodating the motor 34 and the control unit 40. 22, a battery B removably attached to the body housing 22, and a top handle 24 provided on the top of the body housing 22. As shown in FIG. 3, when the chain saw 2 is mounted and the chain saw 2 is viewed from above, 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, with the chain saw 2 mounted, when the chain saw 2 is viewed from the rear, the motor 34 and the battery B at least partially overlap, and the motor 34 and the control unit 40 At least partially overlapping. In the chain saw 2 on which the motor 34 is mounted, in most cases, the motor 34 is disposed such that its output shaft 50 is along the left-right direction of the chain saw 2. In this case, when the battery B or the control unit 40 is disposed above or below the motor 34 inside the main housing 22, the vertical dimension of the main housing 22 is increased. According to the above configuration, since the battery B and the control unit 40 are not disposed above or below the motor 34 inside the main housing 22, the vertical dimension of the main housing 22 can be further reduced. . Further, according to the above configuration, when the chain saw 2 is viewed from the rear, the motor 34 and the battery B overlap at least partially, and the motor 34 and the control unit 40 overlap at least partially. The dimension in the left-right direction of the housing 22 can also be miniaturized.

  In the chain saw 2 according to one embodiment, the battery B and the control unit 40 are disposed rearward of the motor 34. According to the above configuration, the battery B can be attached and detached behind the main body housing 22 at a position away from the guide bar 6, and the user can easily attach and detach the battery B. Further, according to the above configuration, since both the battery B and the control unit 40 are disposed behind the motor 34, the dimension in the front-rear direction of the main body housing 22 can be further reduced.

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

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

  The chain saw 2 according to one embodiment further includes a top handle 24 provided on the top of the main body housing 22. The discharge amount adjustment mechanism 126 is disposed 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 adjustment pin 94 with the left hand while holding the top handle 24 with the right hand and holding the chain saw 2. The operation of adjusting the discharge amount of lubricating oil can be easily performed.

  In the chain saw 2 according to one embodiment, the oil pump 38 is disposed on the left side of the motor 34. Assuming that the oil pump 38 is disposed on the right side of the motor 34, if the ejection amount adjusting mechanism 126 is disposed on the left side of the top handle 24, the ejection amount adjusting mechanism 126 needs to have a complicated configuration. According to the above configuration, since the oil pump 38 is disposed on the left side of the motor 34 and the discharge amount adjustment mechanism 126 is disposed on the left side of the top handle 24, the discharge amount adjustment mechanism 126 has a simple structure can do.

  The chain saw 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 adjustment mechanism 126 is disposed rearward of the front end of the side handle 14. According to the above configuration, when the user operates the adjustment pin 94, the side handle 14 does not get in the way. The operation of adjusting the discharge amount of lubricating oil can be performed more easily.

  In the chain saw 2 according to one embodiment, the discharge amount adjustment mechanism 126 is disposed 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 the body or lifting the chain saw 2 to the height of the eye line. Thus, the user can more easily perform the operation of operating the adjustment pin 94.

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

  The chain saw 2 according to one embodiment houses a motor 34 (an example of a prime mover) that rotates the saw chain 8 around the guide bar 6, a sprocket 56 that transmits the rotation of the motor 34 to the saw chain 8, and the motor 34. A main body housing 22, a sprocket cover 20 covering the sprockets 56, and a top handle 24 provided above the main body housing 22 are provided. As shown in FIG. 10, when the chain saw 2 is mounted from above with the chain saw 2 mounted, the right end face of the top handle 24 has a distance L1 from the right end face of the top handle 24 to the center line of the guide bar 6 The ratio of the distance L1 to the distance L1 + L2 from the rear end to the right end face of the sprocket cover 20 is 0.3 or less. According to the above configuration, since the top handle 24 and the guide bar 6 are disposed relatively close in the left-right direction, when the user grips the top handle 24, the cutting position by the saw chain 8 can be intuitive To make it easy to understand. Further, according to the above configuration, the center of gravity of the guide bar 6 is closer to the top handle 24 and closer to the center of gravity G of the chain saw 2 in the left-right direction of the chain saw 2. For this reason, even when different types of guide bars 6 are attached, it is possible to suppress a change in the position of the center of gravity G of the chain saw 2 in the left-right direction of the chain saw 2.

  In the chain saw 2 according to one embodiment, when the chain saw 2 is mounted, when the chain saw 2 is viewed from above, a range from the center line of the top handle 24 in the left-right direction to twice the width of the top handle 24 in the left-right direction In the inside, the center of gravity G of the chain saw 2 is disposed. According to the above configuration, when the user grips the top handle 24 with the right hand and holds the chain saw 2, the chain saw 2 is less likely to tilt left and right. The workability of the cutting operation using the chain saw 2 can be improved.

  In the chain saw 2 according to one embodiment, the motor that rotates the saw chain 8 around the guide bar 6 is the motor 34. Since the motor 34 is simple in structure as compared to other prime movers such as an engine, when designing the chain saw 2, it is easy to identify the position of the center of gravity and 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 chain saw 2 can be arranged in the vicinity of the top handle 24 in the left-right direction of the chain saw 2.

  The chain saw 2 according to one embodiment further includes a battery B removably attached to the body housing 22. Unlike the case where power is supplied by the power cord, when power is supplied by the battery B, the battery B attached to the main housing 22 can be used as a weight for adjusting the position of the center of gravity of the chain saw 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 chain saw 2 is disposed in the vicinity of the top handle 24 in the left-right direction of the chain saw 2. can do.

  In the chain saw 2 according to one embodiment, the battery B may be configured to be removable from the battery attachment portion 22c of the main body housing 22 by sliding the battery B in the front-rear direction.

  In the chain saw 2 according to one embodiment, the battery attachment portion 22c of the main housing 22 may be provided on the front, rear, left, right or upper surface of the main housing 22. In this case, the direction in which the battery B is slid may be an arbitrary direction along the battery attachment 22c, for example, the vertical direction, the horizontal direction, or the front-rear direction.

  In the chain saw 2 according to one embodiment, in the discharge amount adjusting mechanism 126, the adjusting pin 94 penetrates the adjusting opening 124 and protrudes outside the main body housing 22, and the tool groove 94a is disposed outside the main body housing 22. It may be Alternatively, the discharge amount adjustment mechanism 126 may include a lever or a dial exposed to the outside of the main body housing 22, and the lever or the dial may be mechanically coupled to the adjustment pin 94 through the adjustment opening 124. .

  The chain saw 2 according to one embodiment may be powered via the power cord without attaching the battery B.

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

  As mentioned above, although the specific example of this invention was described in detail, these are only an illustration and do not limit a claim. The art set forth in the claims includes various variations and modifications of the specific examples illustrated above. The technical elements described in the present specification or the drawings exhibit technical usefulness singly or in various combinations, and are not limited to the combinations described in the claims at the time of application. In addition, the techniques exemplified in the present specification or the drawings can simultaneously achieve a plurality of purposes, and achieving one of the purposes itself has technical utility.

2: Chain saw 4: Body 6: Guide bar 6a: Slotted hole 8: Saw chain 10: Left housing 12: Right housing 14: Side handle 16: Hand guard 18: Brake cover 20: Sprocket cover 20a: Recess 20b: Opening for fastening 20c: adjustment opening 22: main housing 22a: front main housing 22b: rear main housing 22c: battery mounting portion 22d: hand rest 24: top handle 24a: support 24b: grip 24c: recess 26: power switch 28: Power lamp 30: trigger switch 32: trigger lock lever 34: motor 36: oil tank 36a: opening for replenishment 38: oil pump 40: control unit 42: coil 44: stator 44: rotor 46: cooling fan 50: 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: Engage claw 66: Support bolt 67: Engage hole 68: Nut 69: rotary linear motion conversion mechanism 70: adjustment screw 72: link mechanism 74: brake shoe 76: cap 78: opening for liquid level confirmation 80: introduction pipe 82: lead pipe 84: worm gear 86: bracket 88: plunger 90: front cap 92: rear cap 94: adjustment pin 94a: tool groove 94b: projection 96: front internal space 98: rear internal space 100: introduction port 102: lead port 104: upper port 106: lower port 106a: seating surface 108 : Opening 110: Coil spring 112: Positioning Pin 114: small diameter portion 114a: notch 114b: seal receiving portion 116: threaded portion 118: large diameter portion 118a: rear end face 120: sealing 122: coil spring 124: adjustment opening 126: discharge amount adjusting mechanism

Claims (3)

A motor that rotates the saw chain around the guide bar,
A control unit that controls an applied voltage to the motor;
A main body housing for accommodating the motor and the control unit;
A battery removably attached to the body housing;
A chain saw comprising a top handle provided at an upper portion of the body housing,
When the chain saw is mounted, when the chain saw is viewed from above, the motor and the battery do not overlap, and the motor and the control unit do not overlap.
A chain saw wherein the motor and the battery at least partially overlap and the motor and the control unit at least partially overlap when the chain saw is viewed from the rear with the chain saw mounted.   The chain saw of claim 1, wherein the battery and the control unit are disposed behind the motor.   The motor is disposed within a range of 1.2 times the width of the battery in the left-right direction from the center line of the battery in the left-right direction when the chain saw is viewed from above with the chain saw placed thereon The chain saw of Claim 1 or 2.

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