JP2024014110A - Work machine - Google Patents

Abstract

To provide a work machine which has secured workability.SOLUTION: A jig saw 1 being a work machine comprises: a motor 10; a plunger 30 driven by the motor 10; a conversion mechanism 20, which transmits the drive power of the motor 10 to the plunger 30; a housing 2 including a gear housing part 4, which stores the motion conversion mechanism 20, and a motor housing part 5, which stores 10; a switch 61 which is supported by the gear housing part 4 and by which the drive and stop of the motor 10 changes over by being operated by an operator; and a wall part 210 which is formed integrally with the gear housing part 4 to partition between the switch 61 and the motion conversion mechanism 20.SELECTED DRAWING: Figure 5

Description

The present invention relates to a working machine.

A jigsaw has been known as an example of a working machine. A jigsaw includes a motor as a drive source housed in a housing, and a transmission mechanism that transmits the rotational force of the motor to a plunger.

In the working machine of Patent Document 1, the case that accommodates the transmission mechanism is configured as a separate member from the case that accommodates the motor and the housing that accommodates other electrical components.

JP2016-87730A

However, the case housing the transmission mechanism is heavy and has a complicated structure, which causes an increase in the weight of the work machine and an increase in the cost of manufacturing the work machine. On the other hand, if the transmission mechanism is not housed in a case, the grease from the transmission mechanism will adhere to other members in the housing, and the attached grease will adversely affect the operation of other members, which will impede the workability of the work equipment. There is a possibility of causing Particularly when the switch is placed near the transmission mechanism for convenience, if grease adheres to the switch, which is an electrical component, there is a risk of failure. Furthermore, if the switch is simply placed inside the housing, there is a risk that the switch will malfunction due to not only grease but also dust entering from the outside through the intake port.

A working machine according to one embodiment includes: a motor, an output shaft driven by the motor, a transmission mechanism that transmits the driving force of the motor to the output shaft, and a first housing section that houses the transmission mechanism. a housing including a second accommodating part that accommodates the motor; a switch supported by the first accommodating part, which switches between driving and stopping the motor when operated by an operator; A wall portion is formed integrally with the first accommodating portion and partitions between the switch and the transmission mechanism.

A work machine according to an embodiment includes a motor, an output shaft driven by the motor, a housing that accommodates the motor, and a work machine that is arranged outside the housing and that is operated by a worker to drive the motor. and a cover member attached to the housing and covering the switch disposed outside the housing.

According to the present invention, it is possible to provide a working machine that ensures workability.

FIG. 2 is an external view of a working machine in an embodiment. FIG. 3 is an internal side view of the work machine. It is a sectional view of a work machine. 2 is a sectional view taken along line AA of the working machine shown in FIG. 1. FIG. FIG. 2 is a perspective view of a part of the working machine shown in FIG. 1 taken along line AA. FIG. 2 is an external side view showing the working machine shown in FIG. 1 with a cover member removed. FIG. 7(A) is an external perspective view of the working machine with the cover member removed, and FIG. 7(B) is an external perspective view showing the state shown in FIG. 7(A) with the operating member further removed. It is a diagram. FIG. 3 is a perspective view of an operating member. It is a side view of the work machine in a modification.

A jigsaw, which is a working machine according to an embodiment, will be described with reference to the drawings.

<About the overall structure>
FIG. 1 is an external view of a jigsaw 1 according to this embodiment. In addition, along the arrows shown in FIG. 1, the left side of the page is the front, the right side of the page is the back, the top of the page is the top, the bottom of the page is the bottom, and the front of the page perpendicular to the front-back direction and the up-down direction. The direction is sometimes called the left direction, and the direction toward the back of the page is sometimes called the right direction. 2 and 3 are diagrams showing the inside of the jigsaw 1. FIG. 4 is a sectional view taken along the line AA in FIG. 1, and FIG. 5 is a perspective view of a part of the jigsaw 1 when the jigsaw 1 is cut along the line AA in FIG.

The jigsaw 1 is a working machine that cuts an object by moving a blade 33, which is a tip tool, toward the front in a vertically reciprocating manner in a straight line. The jigsaw 1 includes a housing 2, an operating section 6, a motor 10, a motion conversion mechanism 20, a plunger 30, a counterweight 40, a control section 70, a battery terminal 71, and a dial 72.

<About Housing 2>
The housing 2 is formed, for example, by injection molding of synthetic resin or the like. The housing 2 forms the outer shell of the jigsaw 1 and includes a rear part 3, a gear housing part (first housing part) 4, and a motor housing part (second housing part) 5. The housing 2 is a two-part housing formed by assembling two divided housings in the left-right direction. More specifically, the housing 2 is formed by assembling a right side housing 2a and a left side housing 2b that are substantially symmetrical to each other with respect to a virtual plane passing through the center of the housing 2 in the left and right direction and orthogonal to the left and right direction. (See Figures 4 and 5). For this reason, the housing 2 is configured to be substantially symmetrical. Note that FIG. 2 shows a state in which the right housing 2a of the housing 2 is removed, and FIG. 3 shows a cross section of the jigsaw 1 at a combined surface of the right housing 2a and the left housing 2b.

Further, the rear section 3, gear housing section 4, and motor housing section 5 are distinguished for convenience of explanation, and the actual rear section 3, gear housing section 4, and motor housing section 5 are integral (inseparable).

The rear part 3 is provided at the rear of the motor housing part 5 and extends rearward with respect to the motor housing part 5. The rear part 3 is held by an operator when using the jigsaw 1. A power supply section 7 is removably attached to the lower part of the rear section 3. The power supply unit 7 has, for example, a rectangular parallelepiped shape, and accommodates therein a battery including a plurality of lithium battery cells or the like. When the power source section 7 is attached to the jigsaw 1, it is electrically connected to a battery terminal 71 provided inside the rear section 3.

Inside the rear section 3, a control section 70, a battery terminal 71, a dial 72, etc. are housed. The control unit 70 includes a control board and a control circuit mounted on the control board. The control unit 70 outputs a control signal to the motor 10 to control the start and stop of driving the motor 10, which will be described later, in response to the operation of the operating unit 6, which will be described later. The battery terminal 71 is an electrical contact that comes into contact with an output terminal in the power supply section 7 when the power supply section 7 is attached to the rear section 3 . Via this battery terminal 71, driving power for driving the motor 10, which will be described later, is supplied to the motor 10.

The dial 72 is a member that is operated when setting the drive mode of the motor 10 of the jigsaw 1. The dial 72 is a disc-shaped member, and is rotatably provided at the rear end of the rear portion 3 with the center of the disc as a rotation axis. A portion of the outer peripheral edge of the dial 72 is exposed from the rear portion 3, and the operator performs operations on this exposed portion. The jigsaw 1 has drive modes for the motor 10, such as "shift mode" and "AUTO mode," and the control unit 70 controls the motor 10 according to the drive mode.

The motor housing part 5 is a second housing part that houses a motor 10 as a drive source therein. A base 9 is attached to the lower side of the motor housing part 5. The base 9 is brought into contact with the top surface of the object when the jigsaw 1 is used to cut the object.

The gear housing part 4 is a first housing part that is provided at the front part of the motor housing part 5 and houses the motion conversion mechanism 20 . A portion of the inner and outer surfaces of the gear housing portion 4 constitute a wall portion 210 . That is, the wall portion 210 is formed integrally with the gear housing portion 4. The motion conversion mechanism 20, the plunger 30, the counterweight 40, etc. are housed in the housing space S0 surrounded by the wall 210. An operating section 6 that is operated by an operator is provided on the left outer surface of the gear housing section 4 . Further, at the lower part of the gear housing section 4 and behind the plunger 30, an orbital mechanism section 8 is provided which realizes a so-called orbital operation in which the blade 33 is oscillated in conjunction with the rotation of the motor 10.

The jigsaw 1 is a so-called barrel handle type jigsaw, which does not have a thin cylindrical grip, and is operated by an operator by grasping one or both of the gear housing section 4 and the motor housing section 5 from above. be. The operator grasps the connecting part between the gear housing part 4 and the motor housing part 5 (near the rear end position of the part of the gear housing part 4 that protrudes upward) from above, and, for example, holds the thumb on the left side and the other finger on the right side. Hold it in place. In order to facilitate operation with this gripping method, the operating portion 6 is disposed slightly in front of the connecting portion between the gear housing portion 4 and the motor housing portion 5.

<About the wall portion 210>
The wall portion 210 includes a front wall portion 211 , a rear wall portion 212 , an upper wall portion 213 , and a side wall portion 214 . The wall portion 210 partitions between the switch 61 of the operating portion 6 provided outside the housing 2 and the motion converting mechanism 20 housed in the gear housing portion 4, as will be described later. The wall portion 210 is a portion that is molded integrally with the gear housing portion 4 and is configured to be inseparable from the gear housing portion 4. The wall portion 210 having the same shape (actually mirror-symmetrical) as that of the left housing 2b is also formed on the right housing 2a.

<About the front wall portion 211>
The front wall portion 211 is provided on the front surface 4a side of the gear housing portion 4. The front wall portion 211 is located rearward (inner side) of the inner wall surface of the front surface 4a, which is the front end of the gear housing portion 4. Thereby, the front wall portion 211 is located in the space between the front surface 4a of the gear housing portion 4 and the motion conversion mechanism 20, and a space S1 is created between the front wall portion 211 and the front surface 4a of the gear housing portion 4. It is formed. That is, the front wall portion 211 is a first wall portion located in a space between the front surface 4a, which is the front end of the housing 2, and the motion conversion mechanism 20.

The front wall portion 211 is formed into a plate shape with a surface extending in a direction intersecting the front-rear direction, and the right end portion is connected to the inner wall surface of the right housing 2a, and the left end portion is connected to the inner wall surface of the left housing 2b. Connect with. That is, the front wall portion 211 is a protruding wall that is provided inside the gear housing portion 4 of the housing 2 and extends from the inner wall surface of the housing 2 in a direction intersecting the front-rear direction (left-right direction).

Further, the upper end of the front wall portion 211 is located below the inner wall surface of the upper surface 4c of the gear housing portion 4.

<About the rear wall portion 212>
The rear wall portion 212 is provided on the rear surface 4b side of the gear housing portion 4. That is, the rear wall portion 212 is provided near the connection portion with the motor housing portion 5 at the rear of the gear housing portion 4, and is located forward (inner side) of the inner wall surface of the rear surface 4b of the gear housing portion 4. Thereby, the rear wall portion 212 is located in the space between the rear surface 4b of the gear housing portion 4 and the motion conversion mechanism 20, and a space S2 is created between the rear wall portion 212 and the rear surface 4b of the gear housing portion 4. It is formed.

The rear wall portion 212 is formed into a plate shape with a surface extending in a direction intersecting the front-rear direction, and the right end portion is connected to the inner wall surface of the right housing 2a, and the left end portion is connected to the inner wall surface of the left housing 2b. Connect with. That is, the rear wall portion 212 is also a protruding wall that is provided inside the gear housing portion 4 of the housing 2 and extends from the inner wall surface of the housing 2 in a direction intersecting the front-rear direction (left-right direction). Further, the upper end of the rear wall portion 212 is located below the inner wall surface of the upper surface 4c of the gear housing portion 4.

<About the upper wall portion 213>
The upper wall portion 213 is formed in a plate shape with a surface extending in a direction intersecting the up-down direction, and is connected to the upper end of the front wall portion 211 at the front end, and connected to the rear wall portion 212 at the rear end. Connect to the top end of. The right end of the upper wall portion 213 is connected to the inner wall surface of the right housing 2a, and the left end thereof is connected to the inner wall surface of the left housing 2b. That is, the upper wall portion 213 is also a protruding wall that is provided inside the gear housing portion 4 of the housing 2 and extends from the inner wall surface of the housing 2 in the left-right direction.

The upper wall portion 213 is located below the inner wall surface of the upper surface 4c of the gear housing portion 4. Thereby, a space S3 is formed between the upper wall portion 213 and the upper surface 4c of the gear housing portion 4.

<About the side wall portion 214>
The side wall portion 214 is a part of the area forming the left housing 2b. The side wall portion 214 is a region that includes the position of the operating portion 6 disposed on the outer surface of the left housing 2b. The front end of the side wall 214 is connected to the front wall 211 described above. A switch 61 of the operating section 6, the details of which will be described later, and a cover member 63 that covers the switch 61 are attached to the outside (left side surface) of the side wall portion 214.

As described above, since the front wall portion 211 is located at the rear (inner side) of the front surface 4a of the gear housing portion 4, the front end of the side wall portion 214 (that is, the connecting end with the front wall portion 211) is also located at the rear of the front surface 4a of the gear housing portion 4. As a result, an opening OP (see FIG. 5) is formed between the front end of this side wall portion 214 and the front surface 4a. That is, the opening OP is formed in front of the motion conversion mechanism 20, which will be described later. The space S1 inside the housing 2 and the space outside the housing 2 communicate with each other through the opening OP. A wiring 610 connected to a switch 61 whose details will be described later passes through an opening OP formed in the housing 2.

<About the combination structure of the wall portion 210>
As described above, the housing 2 is divided into the right housing 2a and the left housing 2b near the center in the left-right direction. Therefore, as shown in FIGS. 4 and 5, each of the front wall 211, the rear wall 212, and the upper wall 213, which are protruding walls provided inside the housing 2 and extending in the left-right direction, It is constructed by combining a right side protruding wall 217 and a left side protruding wall 218 that are divided near the center in the left-right direction.

The right side protruding wall 217 and the left side protruding wall 218 have a dividing surface 217a and a dividing surface 218a facing each other. A recess 217b is formed on the dividing surface 217a, and a convex portion 218b is formed on the dividing surface 218a. When the right housing 2a and the left housing 2b are combined, the recess 217b of the dividing surface 217a and the protrusion 218b of the dividing surface 218a engage with each other.

Note that a convex portion may be formed on the dividing surface 217a, and a recessed portion may be formed on the dividing surface 218a. That is, it is sufficient if a convex portion is formed on one of the dividing surfaces 217a and 218a, and a concave portion is formed on the other.

<About the operation section 6>
The operating portion 6 is disposed outside the side wall portion 214 of the left housing 2b of the housing 2. The operation unit 6 includes a switch 61 and an operation member 62. The switch 61 is arranged outside the housing 2 (side wall portion 214). That is, the side wall portion 214 is a second wall portion that supports the switch 61. From another perspective, the switch 61 is supported by the gear housing part 4, which is the first housing part.

FIG. 6 is an external side view showing a state in which the cover member 63 is removed from the housing 2 of the jigsaw 1 shown in FIG. Note that FIG. 6 shows the jigsaw 1 with the power supply section 7 removed. 7(A) is an external perspective view of the jigsaw 1 with the cover member 63 removed, and FIG. 7(B) shows the state shown in FIG. 7(A) with the operating member 62 further removed. It is an external perspective view. Note that FIGS. 7(A) and 7(B) show the jigsaw 1 with the power supply section 7 and blade 33 removed.

As shown in FIG. 6, the switch 61 is disposed in front of the center position of the motion conversion mechanism 20 in the front-rear direction. Here, the center position of the motion conversion mechanism 20 in the front-rear direction is the position of the axis C along the up-down direction passing through the center of the gear part 22 in the front-rear direction shown in FIG.

When the cover member 63 is attached to the side wall portion 214 of the housing 2, the switch 61 and the opening OP are accommodated in a space surrounded by the housing 2 and the cover member 63. That is, the cover member 63 is a member that covers the switch 61 and has a configuration that covers the opening OP. The switch 61 is electrically connected to the control unit 70 by wiring 610. When a user operates an operating member 62, which will be described later, the switch 61 outputs an electric signal instructing to start and end driving the motor 10, which will be described later, in response to the operation.

The wiring 610 is introduced into the housing 2 through an opening OP formed between the front end of the side wall 214 and the front surface 4a, and is introduced into the motor housing 2 through spaces S1, S3, and S2. 5. That is, the wiring 610 does not pass through the accommodation space S0 inside the wall part 210, but passes in front of and above the motion conversion mechanism 20 accommodated in the accommodation space S0, and is guided to the rear motor housing part 5. In other words, the wiring 610 does not overlap with the motion conversion mechanism 20 when viewed in the left-right direction. The wiring 610 passes through the space above the motor 10 and is connected to the control section 70 provided inside the rear section 3.

FIG. 8 is an external perspective view of the operating member 62, showing the operating member 62 viewed from the side wall portion 214 side. The operating member 62 is attached to the outside of the side wall portion 214 so as to be slidable in the front-back direction. The operating member 62 is provided at the rear of the switch 61 (see FIGS. 6 and 7(A)). The operating member 62 includes a first member 621 that is operated by an operator, and a second member 622 that extends from the rear of the back surface of the first member 621 (the surface facing the housing 2) toward the housing 2 side (right side). , and a third member 623 extending from the right end of the second member 622 toward the front. The second member 622 and the third member 623 are housed in a space surrounded by the housing 2 and the cover member 63 when the cover member 63 is attached to the housing 2 . In other words, the first member 621 is exposed to the outside of the cover member 63.

The first member 621 is a plate-shaped member having a rectangular shape with the long side in the front-rear direction. A hole 623b is formed at the rear of the side surface 623a of the third member 623 facing the side wall portion 214. A screw 214a (see FIG. 7(B)) is inserted into this hole 623b from the side wall portion 214 side.

An elastic member 622b such as a spring (see FIGS. 4 and 5) is provided between the side surface 622a of the second member 622 and the front end surface 630a (see FIG. 4) of the opening 630 formed in the cover member 63. It will be done. The operating member 62 is supported by the cover member 63 in a state where it is biased backward via the second member 622 by the elastic member 622b. Therefore, when the operator operates the operating member 62 forward, the operating member 62 slides forward against the urging force of the elastic member 622b.

When the operating member 62 slides forward, the front end surface 623c of the third member 623 comes into contact with the movable contact 611 of the switch 61 (see FIGS. 6, 7(A), and 7(B)), and the movable contact 611 is brought into contact with the fixed contact 612 (see FIG. 6) of the switch 61. As a result, the switch 61 outputs an electrical signal. When the operator finishes sliding the operating member 62 forward, the operating member 62 slides rearward due to the biasing force of the elastic member 622b and returns to the position before being operated by the operator.

<About the motor 10>
The motor 10 is, for example, a brushless motor having a rotor and a stator. The motor 10 rotates when supplied with driving power from the power supply section 7 via the battery terminal 71. As shown in FIG. 3, the rotating shaft 11 of the motor 10 extends in the front-rear direction. A fan 12 is arranged in front of the motor 10. The fan 12 is coaxially fixed to the rotating shaft 11 and is driven to rotate together with the rotation of the rotating shaft 11. The rotation of the fan 12 generates cooling air flowing from an intake hole (not shown) to an exhaust hole (not shown) inside the housing 2 .

<About the motion conversion mechanism 20>
The motion conversion mechanism 20 is a transmission mechanism that is disposed in front of the motor 10 and transmits the driving force of the motor 10 to a plunger 30, which will be described later. As shown in FIG. 3, the motion conversion mechanism 20 includes a support shaft 21, a gear portion 22, a cam 23, and an engagement pin 24. The support shaft 21 is provided above and parallel to the rotation shaft 11 of the motor 10 . The support shaft 21 rotatably supports the gear part 22. The gear portion 22 engages with the rotating shaft 11 at the tip of the rotating shaft 11 . Thereby, the gear portion 22 rotates around the support shaft 21 due to the rotation of the rotation shaft 11. The cam 23 is provided on the rear surface of the gear portion 22 and fits into an engagement hole 42 of a counterweight 40, which will be described later.

The engagement pin 24 rotates around the support shaft 21 together with the gear portion 22 . The engagement pin 24 is parallel to and different from the rotating shaft 11 and protrudes forward. The engagement pin 24, at its front end, engages with a connector 31 provided at the upper end of a plunger 30, which will be described later.

<About plunger 30>
The plunger 30 is provided in front of the motion conversion mechanism 20, has a substantially cylindrical shape, and extends in a direction (vertical direction) orthogonal to the rotation axis 11. As shown in FIG. 3, the plunger 30 is inserted into an insertion hole 35 of a holding member 34 provided at the lower part of the gear housing part 4.

Plunger 30 has a connector 31 and a blade holding part 32. The connector 31 has an elongated hole that is provided in the state of the plunger 30 and whose longitudinal direction is in the left-right direction. The engagement pin 24 of the motion conversion mechanism 20 described above is inserted into this elongated hole. The engagement pin 24 is allowed to move in the left-right direction inside the elongated hole, and its movement in the up-down direction is restricted. Thereby, the connector 31, that is, the plunger 30, performs only reciprocating linear motion in the vertical direction in accordance with the movement of the engagement pin 24. As a result, the plunger 30 functions as an output shaft driven by the motor 10.

The blade holding portion 32 is provided at the lower end of the plunger 30 and holds the blade 33 in a detachable manner. The blade 33 is a tip tool for cutting an object, and a cutting edge extending in the vertical direction is formed at the front part of the blade 33. That is, the plunger 30, which is the output shaft, has a blade 33, which is a tip tool for working forward, which is detachably attached to the plunger 30.

A coil spring 36 as an elastic body is provided between the holding member 34 through which the plunger 30 is inserted and the inner wall surface of the front surface 4a of the gear housing portion 4. The coil spring 36 urges the holding member 34 rearward. That is, the plunger 30 inserted through the holding member 34 and the blade 33 attached to the blade holding portion 32 of the plunger 30 are urged rearward.

<About Counterweight 40>
The counterweight 40 is provided in front of the motor 10 and behind the motion conversion mechanism 20. An engagement hole 42 is formed in the counterweight 40. The engagement hole 42 is a horizontally elongated hole near the center of the counterweight 40, that is, an elongated hole whose long axis is in the left-right direction. The cam 23 of the movement conversion mechanism 20 described above is fitted into the engagement hole 42 . Further, a protrusion 43 is formed near the lower end of the rear surface of the counterweight 40 . The protrusion 43 pushes down a push rod 80 included in the orbital mechanism section 8, which will be described later, at a predetermined period.

When the gear portion 22 rotates with the rotation of the rotating shaft 11, the cam 23 fitted in the engagement hole 42 rotates while sliding on the inner peripheral surface of the engagement hole 42, thereby rotating the counter. The weight 40 makes a reciprocating linear movement in the up and down direction in opposite phase to the plunger 30. Such reciprocating motion of the counterweight 40 cancels out vibrations caused by the reciprocating motion of the plunger 30.

<About the orbital mechanism section 8>
The orbital mechanism section 8 includes a push rod 80, a swing arm 81, and a roller 82. The push rod 80 has a shape that extends upward from the upper end of the swing arm 81 toward the protrusion 43 of the counterweight 40 . The swing arm 81 has a substantially L-shape when viewed from the side, and is rotatably supported at the lower part of the gear housing section 4 about a support section 83 . The roller 82 is located at the front end of the swing arm 81 and is rotatably supported by the swing arm 81. In the roller 82, a groove recessed inward in the radial direction is formed over the entire circumference. Since the holding member 34, plunger 30, and blade 33 are urged toward the orbital mechanism section 8 by the coil spring 36, the groove formed in the circumferential direction of the roller 82 is in contact with the rear surface of the blade 33. .

<About the operation of jigsaw 1>
The operation of the jigsaw 1 having the above configuration will be explained.

When a worker holding the rear part 3 operates the operating member 62, electric power is supplied to the motor 10, and the rotating shaft 11 of the motor 10 rotates. As the rotating shaft 11 rotates, the gear portion 22 of the motion converting mechanism 20 that is engaged at the tip of the rotating shaft 11 rotates about the support shaft 21 . Then, the engagement pin 24 rotates on the circumference of a circle whose diameter is the eccentric distance along the vertical direction with respect to the support shaft 21 .

The engagement pin 24 rotates inside the elongated hole of the connector 31 while moving in the longitudinal direction (left and right direction) of the elongated hole, so the rotational movement of the engagement pin 24 moves the connector 31, that is, the plunger 30, in the vertical direction. is converted into a linear reciprocating motion. As a result, the blade 33 attached to the blade holding portion 32 of the plunger 30 moves linearly reciprocating in the vertical direction. In this state, when the operator moves the jigsaw 1 forward, an object (not shown) is cut.

Further, the cam 23 fitted into the engagement hole 42 of the counterweight 40 rotates while sliding on the inner peripheral surface of the engagement hole 42. As a result, the counterweight 40 linearly reciprocates in the vertical direction in opposite phase to the plunger 30 and blade 33. Such reciprocating motion of the counterweight 40 cancels out vibrations caused by the reciprocating motion of the plunger 30.

Furthermore, when the counterweight 40 makes a linear reciprocating motion as the gear section 22 rotates, the protrusion 43 formed on the counterweight 40 pushes down the push rod 80 of the orbital mechanism section 8 at a predetermined period. Since the rear end of the swing arm 81 is pushed by the pushed down push rod 80, the swing arm 81 rotates around the support portion 83. As a result, the roller 82 moves forward, and the blade 33 is pushed forward against the biasing force of the coil spring 36. Thereafter, when the push rod 80 is released from being pressed down, the blade 33 is pushed back rearward by the elastic restoring force of the coil spring 36 and returns to its original position. This back and forth movement of the blade 33 is repeated continuously, causing the blade 33 to swing back and forth (orbital motion).

Grease is applied to the motion conversion mechanism 20 that operates as described above. As described above, the wall 210 formed inside the housing 2 isolates the switch 61 of the operating section 6 from the motion conversion mechanism 20 coated with grease. Therefore, the adhesion of grease to the switch 61 due to the operation of the jigsaw 1 is suppressed.

According to the embodiment described above, the following effects can be obtained.

(1) In the jigsaw 1, the wall portion 210 that partitions between the switch supported by the gear housing portion 4 and the motion conversion mechanism 20 is formed integrally with the gear housing portion 4. This prevents grease from adhering to the switch 61 due to the operation of the jigsaw 1, and prevents the occurrence of a failure of the switch 61, thereby making it possible to ensure the workability of the jigsaw 1. Further, since the wall portion 210 is formed integrally with the housing 2, there is no need to manufacture a cover or the like for accommodating the motion conversion mechanism 20 as a separate member. Therefore, it is possible to suppress an increase in the weight of the jigsaw 1 due to the separate member, and to reduce the cost required for manufacturing the cover, which is a separate member.

(2) The switch 61 is arranged in front of the center position of the motion conversion mechanism 20. This makes it easier for the operator to operate the operating section 6, improving convenience. If the switch 61 is placed rearward from the center position of the operation conversion mechanism 20, the position of the operation part 6 will also be shifted to the rear, so that the connection part (grip part) between the gear housing part 4 and the motor housing part 5 will be Although there is a risk that the operation part 6 may interfere and the operability deteriorates, the present invention suppresses such a decrease in workability.

(3) The wall portion 210 includes a front wall portion 211 located in a space between the front surface 4a, which is the front end of the housing 2, and the motion conversion mechanism 20, and a side wall portion 214 that supports the switch 61. The front wall portion 211 intersects with the front-rear direction of the housing 2 . Thereby, the wiring 610 connected to the switch 61 can be accommodated inside the housing 2 without passing through the accommodation space S0 in which the motion conversion mechanism 20 is accommodated.

(4) The switch 61 is arranged outside the housing 2. This prevents grease from adhering to the switch 61 from the motion conversion mechanism 20 due to the operation of the jigsaw 1.

(5) A cover member 63 that covers the switch 61 is provided. This makes it possible to arrange the switch 61 at a position where the attachment of grease from the motion conversion mechanism 20 is suppressed without exposing the switch 61 to the outside.

(6) The operating member 62 for operating the switch 61 is supported by the cover member 63. Thereby, the operation member 62 can be exposed to the outside and can be operated by the operator.

(7) An opening OP through which the wiring 610 connected to the switch 61 passes is formed in the housing 2, and the cover member 63 is configured to cover this opening OP. Thereby, it is possible to suppress dust and the like from entering into the housing 2 from the outside through the opening OP.

(8) The wiring 610 connecting the switch 61 and the control unit 70 housed in the housing 2 passes at least in front of the motion conversion mechanism 20. Thereby, the wiring 610 connected to the switch 61 located in front of the center position of the motion conversion mechanism 20 can be connected to the control unit 70 without passing through the right or left side of the motion conversion mechanism 20. That is, the wiring 610 does not overlap the motion conversion mechanism 20 when viewed in the left-right direction. When the wiring 610 and the motion converting mechanism 20 overlap when viewed in the left-right direction, a wall extending in the vertical and front-back directions is installed between the motion converting mechanism 20 and the inner wall surface of the housing 2 in order to secure a space for the wiring 610 to pass. It is necessary to form a section. If such a wall portion is to be formed integrally with the right housing 2a or the left housing 2b of the housing 2 by injection molding or the like, the difficulty of manufacturing will increase. On the other hand, as in the present embodiment, by arranging the wiring 610 so that it does not overlap with the motion conversion mechanism 20 when viewed in the left-right direction, there is no need to provide the above-mentioned wall portion, so that the wiring 610 is integrated with the housing 2. It becomes possible to easily manufacture the wall portion 210 formed in the shape of the wall portion 210, which contributes to suppressing an increase in manufacturing costs.

(9) The wall portion 210 includes a front wall portion 211, a rear wall portion 212, and an upper wall portion 213, which are protruding walls provided inside the gear housing portion 4 and extending in a direction intersecting the front-rear direction. Thereby, when manufacturing the housing 2 by injection molding, the wall portion 210 can be easily formed, and manufacturing efficiency can be improved.

(10) The front wall 211, the rear wall 212, and the upper wall 213, which are the protruding walls, are a combination of the left protruding wall 218 formed on the left housing 2b and the right protruding wall 217 formed on the right housing 2a. It consists of: Of the divided surfaces 217a and 218a of the right side protruding wall 217 and the left side protruding wall 218, which face each other, a convex portion 218b formed on one divided surface 218a and a recessed portion 217b formed on the other divided surface 217a are formed. engage. As a result, the sealing properties of the dividing surfaces 217a and 218a, which are the combined surfaces when the right side protruding wall 217 and the left side protruding wall 218 are combined, are improved, and the grease applied to the motion conversion mechanism 20 is removed from the outside of the wall portion 210. This prevents the particles from scattering.

<Modified example>
In the embodiment described above, the wiring 610 connected to the switch 61 was connected to the control unit 70 inside the housing 2 through the opening OP located in front of the motion conversion mechanism 20. but not limited to. The opening OP may be formed at the rear of the motion conversion mechanism 20.

FIG. 9 is an external side view of the jigsaw 1 in a modified example, and shows a state in which the cover member 63 is removed, as in the case of FIG. 6. As shown in FIG. 9, it is formed behind the center position of the motion conversion mechanism 20. A wiring 610 connected to the switch 61 extends rearward from the switch 61 on the side wall 214 and is housed inside the housing 2 through the opening OP.

Although various embodiments and modifications have been described above, the present invention is not limited to these. Other embodiments that are considered within the technical spirit of the present invention are also included within the scope of the present invention.

1 Jigsaw, 2 Housing, 2a Right side housing, 2b Left side housing, 3 Rear part, 4 Gear housing part, 4a Front face, 4b Rear face, 4c Top face, 5 Motor housing part, 6 Operation part, 10 Motor, 11 Rotating shaft, 20 Movement Conversion mechanism, 21 Support shaft, 22 Gear part, 23 Cam, 24 Engagement pin, 30 Plunger, 31 Connector, 32 Blade holding part, 33 Blade, 40 Counterweight, 42 Engagement hole, 43 Projection, 61 Switch, 62 Operation member, 63 cover member, 70 control unit, 210 wall, 211 front wall, 212 rear wall, 213 upper wall, 214 side wall, 214a screw, 217 right protruding wall, 217a, 218a dividing surface, 217b recess, 218 left protruding wall, 218b convex portion, 610 wiring, OP opening

Claims (14)

motor and
an output shaft driven by the motor;
a transmission mechanism that transmits the driving force of the motor to the output shaft;
a housing including a first accommodating part that accommodates the transmission mechanism and a second accommodating part that accommodates the motor;
a switch supported by the first accommodating part, which switches between driving and stopping the motor when operated by a worker;
A work machine comprising: a wall portion that is integrally formed with the first storage portion and partitions between the switch and the transmission mechanism. The working machine according to claim 1,
A tip tool for performing work forward can be attached to and detached from the output shaft,
The working machine, wherein the switch is located forward of a center position of the transmission mechanism. The working machine according to claim 2,
A working machine, wherein the wall portion includes at least one of a first wall portion located in a space between the front end of the housing and the transmission mechanism, and a second wall portion that supports the switch. The working machine according to claim 3,
In the working machine, the first wall portion extends in a direction intersecting the front-rear direction of the housing. The working machine according to any one of claims 1 to 4,
The working machine, wherein the switch is disposed outside the housing. The working machine according to claim 5,
A work machine including a cover member that covers the switch. The working machine according to claim 6,
comprising an operating member for operating the switch,
The working machine, wherein the operating member is supported by the cover member. The working machine according to claim 6,
The housing is formed with an opening through which a wire connected to the switch passes,
The working machine, wherein the cover member is configured to cover the opening. The working machine according to any one of claims 1 to 4,
comprising wiring that connects the switch and a control unit housed in the housing,
The working machine, wherein the wiring passes at least in front of the transmission mechanism. The working machine according to claim 9,
In the working machine, the wiring does not overlap with the transmission mechanism when viewed from left to right. The working machine according to claim 1,
A tip tool for performing work forward can be attached to and detached from the output shaft,
The wall portion includes a protruding wall provided inside the first accommodating portion and extending in a direction intersecting the front-rear direction,
The working machine, wherein the protruding wall partitions between the switch and the transmission mechanism. The working machine according to claim 11,
The housing is configured by combining a left housing and a right housing,
In the work machine, the projecting wall is configured by combining a left projecting wall formed on the left housing and a right projecting wall formed on the right housing. The working machine according to claim 12,
A working machine, wherein a convex portion formed on one of mutually opposing surfaces of the left side protruding wall and the right side protruding wall engages with a recess formed on the other side. motor and
an output shaft driven by the motor;
a housing that accommodates the motor;
a switch disposed outside the housing and operated by an operator to switch between driving and stopping the motor;
A working machine comprising: a cover member attached to the housing and covering a switch arranged outside the housing.

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