JP7249812B2 - Electric tool - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a power tool with a source of electromagnetic noise.

Patent Document 1 describes a technique of installing a ferrite core inside a housing in order to reduce electromagnetic noise generated from an electric power tool.

JP 2015-213980 A

However, the technology described in Patent Document 1 requires the addition of a special component having a function of absorbing electromagnetic noise, which increases the manufacturing cost of the power tool.
An object of the present disclosure is to reduce the emission of electromagnetic noise from a power tool without using parts that absorb electromagnetic noise.

One aspect of the present disclosure is a power tool that includes a noise source, a lead, and a blocking portion. A noise source emits electromagnetic noise. The leads are configured to transmit electrical signals or electrical energy. The blocker is positioned between at least a portion of the lead and the noise source to block at least a portion of the lead from approaching the noise source.

In the power tool of the present disclosure configured in this manner, the blocking portion blocks at least a portion of the lead wire from approaching the noise source. Therefore, the power tool of the present disclosure can suppress the occurrence of a situation in which electromagnetic noise emitted from the noise source is transmitted to the core wire of the lead wire. That is, the power tool of the present disclosure can suppress the occurrence of a situation in which electromagnetic noise emitted from a noise source propagates to a lead wire on which electromagnetic noise is not superimposed, and is emitted using the lead wire as an antenna. can. As a result, the power tool of the present disclosure can reduce the emission of electromagnetic noise from the power tool without using a component that absorbs electromagnetic noise.

In one aspect of the present disclosure, a main housing is provided, the main housing includes a receiving-side housing and a covering-side housing, and the blocking portion is formed so as to protrude from an inner wall of the covering-side housing, It may be installed so as to face the noise source when the side housing is fitted. A body housing forms an enclosure for the power tool and is configured to house the noise source, leads and blockage. The covering-side housing is fitted so as to cover the receiving-side housing.

As a result, even if the lead wire and the noise source face each other before the covering-side housing is covered with the receiving-side housing, the noise source can be eliminated by covering the covering-side housing with the receiving-side housing. can be pushed out by the blocking portion. Therefore, in the power tool of the present disclosure, the lead wire can be arranged so that the noise source and the lead wire are separated, and the electromagnetic noise from the power tool can be suppressed without using a component that absorbs electromagnetic noise. Emissions can be reduced.

In one aspect of the present disclosure, a main body housing is provided, and the main body housing includes a receiving side housing and a covering side housing, and the lead wire, the blocking portion, and the noise source are arranged in this order from the bottom surface of the recess. can be A recess is formed in the receiving housing.

Thereby, the power tool of the present disclosure can prevent the lead wire from approaching the noise source by the blocking portion. Therefore, the power tool of the present disclosure can reduce electromagnetic noise emission from the power tool without using a component that absorbs electromagnetic noise.

In one aspect of the present disclosure, the present disclosure comprises a body housing, the body housing comprising a receiving housing and a covering housing, a noise source, a lead wire and a blocking part mounted on the receiving housing, the blocking part comprising a noise It may be arranged so as to face the source.

Thereby, the power tool of the present disclosure can prevent the lead wire from approaching the noise source by the blocking portion. Therefore, the power tool of the present disclosure can reduce electromagnetic noise emission from the power tool without using a component that absorbs electromagnetic noise.

According to one aspect of the present disclosure, the power tool includes a noise source inclusion portion that includes a noise source therein, and the blocking portion is in close contact with the noise source inclusion portion so as to face the noise source. You can make it look like Accordingly, in the power tool of the present disclosure, the lead wire can be arranged such that the noise source and the lead wire are separated by the blocking portion. Therefore, the power tool of the present disclosure can reduce electromagnetic noise emission from the power tool without using a component that absorbs electromagnetic noise.

In one aspect of the present disclosure, the blocking portion may cover the periphery of the lead wire. Accordingly, in the power tool of the present disclosure, the lead wire can be arranged such that the noise source and the lead wire are separated by the blocking portion. Therefore, the power tool of the present disclosure can reduce electromagnetic noise emission from the power tool without using a component that absorbs electromagnetic noise.

In one aspect of the present disclosure, the noise source is molded, the blocking portion is arranged to face the noise source, and is fixed by the molding material that molds the noise source. good. Accordingly, in the power tool of the present disclosure, the lead wire can be arranged such that the noise source and the lead wire are separated by the blocking portion. Therefore, the power tool of the present disclosure can reduce electromagnetic noise emission from the power tool without using a component that absorbs electromagnetic noise.

1 is a cross-sectional view showing the configuration of an electric power tool according to a first embodiment; FIG. It is a perspective view which shows the internal structure of the covering side housing of 1st Embodiment. 4 is a perspective view of the controller and ribs of the first embodiment; FIG. FIG. 5 is a cross-sectional view showing the configuration of the power tool of the second embodiment; It is a perspective view which shows the internal structure of the covering side housing of 2nd Embodiment. FIG. 11 is a perspective view of the controller and ribs of the second embodiment; It is a figure which shows the state before and after fitting the receiving side housing and the covering side housing in 3rd Embodiment. FIG. 11 is a perspective view showing the arrangement of ribs, controllers and lead wires in the fourth embodiment; It is a front view which shows arrangement|positioning of the rib of 5th Embodiment, a controller, and a lead wire. FIG. 12 is a perspective view showing the arrangement of spacers, controllers and lead wires in the sixth embodiment; It is a figure which shows arrangement|positioning of the controller case of 7th Embodiment, a controller, and a lead wire. FIG. 20 is a diagram showing the layout of the controller case, controller, spacers and lead wires of the eighth embodiment; FIG. 11 is a diagram showing a schematic configuration of a power tool according to a ninth embodiment; FIG. 20 is a diagram showing a schematic configuration of a power tool according to a tenth embodiment; FIG. 11 is a diagram showing a schematic configuration of an electric power tool according to an eleventh embodiment; FIG. 21 is a diagram showing a schematic configuration of a power tool according to a twelfth embodiment; FIG. 32 is a front view of the integrated motor and spacer of the thirteenth embodiment; FIG. 32 is a side view of the integrated motor and spacer of the thirteenth embodiment; FIG. 11 is a plan view showing the arrangement of ribs, controllers and leads of another embodiment; FIG. 11 is a cross-sectional view showing the arrangement of ribs, controllers and leads in another embodiment; FIG. 10 is a perspective view showing the arrangement of spacers, controllers and leads in another embodiment;

(First embodiment)
A first embodiment of the present disclosure will be described below with reference to the drawings.
As shown in FIG. 1, the power tool 1 of this embodiment includes a main body housing 2, a battery pack 3, a motor 4, a power transmission mechanism 5, a controller 6, a tip tool 7, and a plurality of lead wires 8. and Note that the lead wire 8 is not shown in FIG. 1, but is shown in FIG.

The power tool 1 is used for chipping a workpiece (for example, concrete) by reciprocating a tip tool 7 detachably attached to the power tool 1 .
The body housing 2 forms an outer shell of the power tool 1 . The body housing 2 is formed of a receiving side housing 11 and a covering side housing 12 . That is, the body housing 2 accommodates the motor 4, the power transmission mechanism 5, the controller 6, and the lead wires 8 by fitting the covering side housing 12 over the receiving side housing 11 so as to cover them. Note that the cover-side housing 12 is not shown in FIG. 1, but is shown in FIG. The body housing 2 also has a grip portion 14 that is gripped by the operator on the side opposite to the side on which the tip tool 7 is attached. The gripping portion 14 is provided with a trigger switch 15 for inputting a drive command for the power tool 1 while the operator grips the gripping portion 14 .

Further, the body housing 2 is formed with intake ports for taking in air in the regions R1 and R2. As a result, the air that has flowed in from the intake port circulates inside the body housing 2 as indicated by the circulating path CP.

The battery pack 3 is detachably attached to the body housing 2 and supplies DC power to the motor 4 and the controller 6 .
The motor 4 receives power supply from the battery pack 3 and rotates to generate driving force for driving the tool bit 7 .

The power transmission mechanism 5 converts the rotation of the motor 4 into reciprocating motion and transmits the reciprocating motion to the tool bit 7 .
The controller 6 controls driving of the motor 4 in accordance with a drive command input by the operator operating the trigger switch 15 .

The lead wires 8 are connected to the components housed in the body housing 2 to transmit electrical signals between the components.
The covering-side housing 12 includes ribs 21 formed to protrude from the inner wall 12a of the covering-side housing 12, as shown in FIG. As shown in FIG. 3, the controller 6 incorporates a microcomputer (hereinafter referred to as microcomputer) 6a having a CPU, ROM, RAM, and the like.

The rib 21 is arranged on the surface of the controller 6 so as to face the microcomputer 6a when the receiving side housing 11 and the covering side housing 12 are fitted together. As a result, the lead wires 8 that are in contact with the surface of the controller 6 while facing the microcomputer 6a are pushed out by the ribs 21. As shown in FIG. In this way, the lead wire 8 can be prevented from facing the microcomputer 6a.

The power tool 1 configured as described above includes a microcomputer 6 a , lead wires 8 , and ribs 21 . The microcomputer 6a emits electromagnetic noise. Leads 8 are configured to transmit electrical signals. The rib 21 is arranged between at least part of the lead wire 8 and the microcomputer 6a to prevent at least part of the lead wire 8 from approaching the microcomputer 6a.

Thus, in the power tool 1, the rib 21 prevents at least part of the lead wire 8 from approaching the microcomputer 6a. Therefore, the power tool 1 can prevent the electromagnetic noise generated by the microcomputer 6 a from being transmitted to the core wire of the lead wire 8 . That is, the power tool 1 can suppress the occurrence of a situation in which the electromagnetic noise emitted from the microcomputer 6a propagates to the lead wire 8 on which the electromagnetic noise is not superimposed, and is emitted using the lead wire 8 as an antenna. can. As a result, the power tool 1 can reduce the emission of electromagnetic noise from the power tool 1 without using a component that absorbs electromagnetic noise.

The power tool 1 also includes a body housing 2 . The body housing 2 forms the outer shell of the power tool 1 and accommodates the microcomputer 6a, the lead wires 8 and the ribs 21. As shown in FIG. The body housing 2 includes a receiving side housing 11 and a covering side housing 12 . The covering side housing 12 is fitted so as to cover the receiving side housing 11 . The rib 21 is formed to protrude from the inner wall 12a of the covering-side housing 12. As shown in FIG. The rib 21 is installed so as to face the microcomputer 6a when the receiving side housing 11 and the covering side housing 12 are fitted together.

As a result, even if the lead wire 8 and the microcomputer 6a face each other before the covering side housing 12 is covered with the receiving side housing 11, the power tool 1 can cover the receiving side housing 11 with the covering side housing 12. , the lead wire 8 facing the microcomputer 6 a can be pushed out by the rib 21 . Therefore, in the electric power tool 1, the lead wire 8 can be arranged so that the microcomputer 6a and the lead wire 8 are separated from each other. can reduce the emission of

In the embodiment described above, the microcomputer 6a corresponds to the noise source, and the rib 21 corresponds to the blocker.
(Second embodiment)
A second embodiment of the present disclosure will be described below with reference to the drawings.

As shown in FIG. 4, the power tool 51 of this embodiment includes a main body housing 52, a battery pack 53, a motor 54, a power transmission mechanism 55, a controller 56, a tip tool 57, and a plurality of lead wires 58. and Note that the lead wire 58 is not shown in FIG. 4, but is shown in FIG.

The power tool 51 is used to cut a material to be processed (for example, wood) by reciprocating a tip tool 57 that is detachably attached to the power tool 51 .
A body housing 52 forms an outer shell of the power tool 51 . The body housing 52 is formed of a receiving side housing 61 and a covering side housing 62 . That is, the body housing 52 accommodates the motor 54 , the power transmission mechanism 55 , the controller 56 and the lead wires 58 by fitting the covering side housing 62 over the receiving side housing 61 . Note that the cover-side housing 62 is not shown in FIG. 4, but is shown in FIG. In addition, the body housing 52 is formed with a grip portion 64 gripped by the operator on the side opposite to the side on which the tip tool 57 is attached. The gripping portion 64 is provided with a trigger switch 65 for inputting a command to drive the power tool 51 while the operator grips the gripping portion 64 .

The battery pack 53 is detachably attached to the body housing 52 and supplies DC power to the motor 54 and the controller 56 .
The motor 54 receives power supply from the battery pack 53 and rotates to generate driving force for driving the tip tool 57 .

The power transmission mechanism 55 converts the rotation of the motor 54 into reciprocating motion and transmits it to the tip tool 57 .
The controller 56 controls driving of the motor 54 according to a drive command input by the operator operating the trigger switch 65 .

Leads 58 are connected to the components contained in body housing 52 to transmit electrical signals between the components.
The covering-side housing 62 includes ribs 71 formed to protrude from the inner wall 62a of the covering-side housing 62, as shown in FIG. The controller 56 incorporates a microcomputer 56a having a CPU, ROM, RAM, etc., as shown in FIG.

The rib 71 is arranged on the surface of the controller 56 so as to face the microcomputer 56a when the receiving side housing 61 and the covering side housing 62 are fitted together. As a result, the lead wires 58 that are in contact with the surface of the controller 56 facing the microcomputer 56 a are pushed out by the ribs 71 . In this way, the lead wire 58 can be prevented from facing the microcomputer 56a.

The power tool 51 configured in this manner includes a microcomputer 56 a , lead wires 58 and ribs 71 . The microcomputer 56a emits electromagnetic noise. Leads 58 are configured to transmit electrical signals. The rib 71 is disposed between at least a portion of the lead wire 58 and the microcomputer 56a to prevent at least a portion of the lead wire 58 from approaching the microcomputer 56a.

Thus, in the power tool 51, the rib 71 prevents at least a portion of the lead wire 58 from approaching the microcomputer 56a. Therefore, the power tool 51 can prevent the electromagnetic noise generated by the microcomputer 56 a from being transmitted to the core wire of the lead wire 58 . That is, the power tool 51 can suppress the occurrence of a situation in which the electromagnetic noise emitted from the microcomputer 56a propagates to the lead wire 58 on which the electromagnetic noise is not superimposed, and is emitted using the lead wire 58 as an antenna. can. As a result, the power tool 51 can reduce the emission of electromagnetic noise from the power tool 51 without using a component that absorbs electromagnetic noise.

The power tool 51 also includes a body housing 52 . The body housing 52 forms the outer shell of the power tool 51 and accommodates the microcomputer 56 a, the lead wires 58 and the ribs 71 . The body housing 52 includes a receiving side housing 61 and a covering side housing 62 . The covering side housing 62 is fitted so as to cover the receiving side housing 61 . The rib 71 is formed to protrude from the inner wall 62a of the covering-side housing 62. As shown in FIG. The rib 71 is installed so as to face the microcomputer 56a when the receiving side housing 61 and the covering side housing 62 are fitted together.

As a result, even if the lead wire 58 and the microcomputer 56a face each other before the covering side housing 62 is covered with the receiving side housing 61, the electric power tool 51 can cover the receiving side housing 61 with the covering side housing 62. , the lead wire 58 facing the microcomputer 56 a can be pushed out by the rib 71 . Therefore, in the power tool 51, the lead wire 58 can be arranged so that the microcomputer 56a and the lead wire 58 are separated from each other. can reduce the emission of

In the embodiment described above, the microcomputer 56a corresponds to the noise source, and the rib 71 corresponds to the blocker.
(Third embodiment)
A third embodiment of the present disclosure will be described below with reference to the drawings.

The power tool 101 of this embodiment includes a body housing 102, a motor 103, a controller 104, and a plurality of lead wires 105, as shown in FIG.
A body housing 102 forms an outer shell of the power tool 101 . The body housing 102 is formed by a receiving side housing 111 and a covering side housing 112 . That is, the body housing 102 accommodates the motor 103 , the controller 104 and the lead wires 105 by fitting the covering side housing 112 over the receiving side housing 111 .

The motor 103 is powered by a battery pack attached to the power tool 101 and rotates to generate driving force for driving the tip tool attached to the power tool 101 .
The controller 104 is mainly composed of a microcomputer 131 (hereinafter referred to as microcomputer 131) having a CPU, ROM, RAM, and the like. The controller 104 controls driving of the motor 103 according to a drive command input by the operator operating the trigger switch.

Lead wires 105 are connected to the components housed in body housing 102 to transmit electrical signals between the components.
The receiving housing 111 includes recesses 116 and ribs 117 . The recessed portion 116 has a recessed shape for accommodating therein the motor 103 and a power transmission mechanism for transmitting the driving force of the motor 103 to the tip tool attached to the power tool 101 . Rib 117 is a plate-like member formed to protrude from the inner wall of recess 116 to the outside of recess 116 . A controller 104 is installed on the surface of the rib 117 in a region outside the recess 116 .

The covering-side housing 112 includes ribs 121 formed to protrude from the inner wall 112 a of the covering-side housing 112 . The rib 121 is arranged to face the microcomputer 131 mounted in the controller 104 in a state where the receiving side housing 111 and the covering side housing 112 are fitted together. As a result, the lead wires 105 that are in contact with the surface of the controller 104 facing the microcomputer 131 are pushed out by the ribs 121 . In this way, the lead wire 105 can be opposed to the microcomputer 131 on the surface of the controller 104 so that they do not come into contact with each other.

The power tool 101 configured in this manner includes a microcomputer 131 , lead wires 105 and ribs 121 . The microcomputer 131 emits electromagnetic noise. Leads 105 are configured to transmit electrical signals. Rib 121 is disposed between at least a portion of lead wire 105 and microcomputer 131 to prevent at least a portion of lead wire 105 from approaching microcomputer 131 .

Thus, in the power tool 101 , the rib 121 prevents at least part of the lead wire 105 from approaching the microcomputer 131 . Therefore, the power tool 101 can prevent the electromagnetic noise generated by the microcomputer 131 from being transmitted to the core wire of the lead wire 105 . That is, the power tool 101 can suppress the occurrence of a situation in which the electromagnetic noise emitted from the microcomputer 131 propagates to the lead wire 105 on which the electromagnetic noise is not superimposed, and is emitted using the lead wire 105 as an antenna. can. As a result, the power tool 101 can reduce the emission of electromagnetic noise from the power tool 101 without using a component that absorbs electromagnetic noise.

The power tool 101 also includes a body housing 102 . The body housing 102 forms the outer shell of the power tool 101 and accommodates the controller 104 , lead wires 105 and ribs 121 . The body housing 102 includes a receiving side housing 111 and a covering side housing 112 . The covering side housing 112 is fitted so as to cover the receiving side housing 111 . The rib 121 is formed to protrude from the inner wall 112a of the covering-side housing 112. As shown in FIG. The rib 121 is installed so as to face the microcomputer 131 when the receiving side housing 111 and the covering side housing 112 are fitted together.

As a result, even if the lead wire 105 and the microcomputer 131 face each other before the covering side housing 112 is covered with the receiving side housing 111 , the power tool 101 can cover the receiving side housing 111 with the covering side housing 112 . , the lead wire 105 facing the microcomputer 131 can be pushed out by the rib 121 . Therefore, in the electric power tool 101, the lead wire 105 can be arranged so that the microcomputer 131 and the lead wire 105 are separated from each other. can reduce the emission of

In the embodiments described above, the microcomputer 131 corresponds to the noise source, and the rib 121 corresponds to the blocker.
(Fourth embodiment)
A fourth embodiment of the present disclosure will be described below with reference to the drawings. In addition, in the fourth embodiment, portions different from the second embodiment will be described. The same code|symbol is attached|subjected about a common structure.

The power tool 51 of the fourth embodiment differs from that of the second embodiment in that the rib 71 is omitted and the rib 73 is added.
As shown in FIG. 8, the receiving housing 61 is formed with a recess 81 for accommodating the controller 56 . This recessed portion 81 is formed by a side surface 81a, a side surface 81b, and a bottom surface 81c. The side surface 81a and the side surface 81b are arranged so as to face each other. The bottom surface 81 c connects the side surfaces 81 a and 81 b and forms the bottom of the recess 81 .

The controller 56 is installed so that the rear surface of the controller 56 is in contact with the side surface 81a.
The rib 73 is formed to protrude from the side surface 81 b toward the surface of the controller 56 . Further, the rib 73 is formed so as to be located between the microcomputer 56a and the bottom surface 81c. Thereby, the rib 73 can prevent the lead wire 58 installed between the rib 73 and the bottom surface 81c from moving toward the microcomputer 56a.

In the power tool 51 configured as described above, the microcomputer 56a, the lead wire 58, and the rib 73 are installed in the recess 81, and the lead wire 58, the rib 73, and the microcomputer 56a are arranged in order from the bottom surface 81c of the recess 81. be done. As a result, the rib 73 of the power tool 51 prevents the lead wire 58 from approaching the microcomputer 56a. Therefore, the power tool 51 can reduce the emission of electromagnetic noise from the power tool 51 without using a component that absorbs electromagnetic noise.

In the embodiments described above, the ribs 73 correspond to blocking portions.
(Fifth embodiment)
A fifth embodiment of the present disclosure will be described below with reference to the drawings. In addition, in the fifth embodiment, portions different from the second embodiment will be described. The same code|symbol is attached|subjected about a common structure.

The power tool 51 of the fifth embodiment differs from the second embodiment in that the rib 71 is omitted and the rib 75 is added.
As shown in FIG. 9, the power tool 51 has a rib 75 protruding from the inner wall of the receiving housing 61 and arranged to face the microcomputer 56a mounted in the controller 56. As shown in FIG.

The rib 75 is a member having an L-shaped cross section in a direction perpendicular to the direction in which the rib 75 projects. It has a shape connecting the vertical portion 75b arranged perpendicularly to the surface of the . The rib 75 is formed such that the vertical portion 75b protrudes from the parallel portion 75a toward the surface of the controller 56. As shown in FIG.

Also, the lead wires 58 arranged near the surface of the controller 56 are installed so as to bypass the ribs 75 so that the lead wires 58 do not exist between the controller 56 and the ribs 75 .
In the power tool 51 configured as described above, the microcomputer 56 a , the lead wire 58 and the rib 75 are installed in the receiving housing 61 , and the rib 75 is arranged to face the microcomputer 56 a of the controller 56 .

As a result, the rib 75 of the power tool 51 prevents the lead wire 58 from approaching the microcomputer 56a. Therefore, the power tool 51 can reduce the emission of electromagnetic noise from the power tool 51 without using a component that absorbs electromagnetic noise.

In the embodiments described above, the ribs 75 correspond to blocking portions .
(Sixth embodiment)
A sixth embodiment of the present disclosure will be described below with reference to the drawings. Note that in the sixth embodiment, portions different from the first embodiment will be described. The same code|symbol is attached|subjected about a common structure.

The power tool 1 of the sixth embodiment differs from the first embodiment in that the rib 21 is omitted and the spacer 41 is added.
The spacer 41 is a plate-shaped member made of metal or resin, and is attached to the surface of the controller 6 so as to face the microcomputer 6a, as shown in FIG. As a result, the power tool 1 can prevent the lead wire 8 from approaching the microcomputer 6a by the spacer 41. FIG.

The power tool 1 configured as described above is a component of the power tool 1 and includes a controller 6 including a microcomputer 6a therein. The spacer 41 is in close contact with the controller 6 so as to face the microcomputer 6a. Thus, in the power tool 1 , the lead wire 8 can be arranged such that the microcomputer 6 a and the lead wire 8 are separated by the spacer 41 . Therefore, the power tool 1 can reduce the emission of electromagnetic noise from the power tool 1 without using a component that absorbs electromagnetic noise.

In the embodiments described above, the controller 6 corresponds to the noise source containing section, and the spacer 41 corresponds to the blocking section.
(Seventh embodiment)
A seventh embodiment of the present disclosure will be described below with reference to the drawings. In addition, in the seventh embodiment, portions different from the second embodiment will be described. The same code|symbol is attached|subjected about a common structure.

The power tool 51 of the seventh embodiment differs from that of the second embodiment in that the rib 71 is omitted and the controller case 77 is added.
As shown in FIG. 11, the controller case 77 is made of metal and has a substantially box-like shape with an open top, and accommodates the controller 56 therein. Further, the inside of the controller case 77 is filled with a molding material 78 . Thereby, the controller 56 is sealed inside the controller case 77 . A lead wire 58 connected to the controller 56 is installed so as to pass under the controller case 77 instead of above it.

(Eighth embodiment)
An eighth embodiment of the present disclosure will be described below with reference to the drawings. Note that in the eighth embodiment, portions different from the second embodiment will be described. The same code|symbol is attached|subjected about a common structure.

The power tool 51 of the eighth embodiment differs from the second embodiment in that the rib 71 is omitted, the controller case 77 is added, and the spacer 43 is added.
As shown in FIG. 12, the controller case 77 is made of metal and has a substantially box-like shape with an open top, and accommodates the controller 56 therein. Further, the inside of the controller case 77 is filled with a molding material 78 . Thereby, the controller 56 is sealed inside the controller case 77 .

The spacer 43 is a member having a U-shaped cross section perpendicular to the surface of the controller 56 , and has a parallel portion 43 a arranged parallel to the surface of the controller 56 and It has a shape in which the vertically arranged vertical portions 43b and 43c are connected. The spacer 43 is formed such that the vertical portions 43b and 43c protrude from the parallel portion 43a toward the surface of the controller 56. As shown in FIG. Further, the spacer 43 is arranged such that the parallel portion 43a faces the microcomputer 56a, and the ends of the vertical portions 43b and 43c are arranged inside the molding material 78. As shown in FIG. Thereby, the spacer 43 is fixed to the controller case 77 so as to cover the microcomputer 56a.

As a result, the lead wires 58 arranged near the surface of the controller 56 are placed around the spacers 43 so that the lead wires 58 do not exist between the controller 56 and the spacers 43 .

In the power tool 51 configured as described above, the microcomputer 56a is molded, and the spacer 43 is arranged so as to face the microcomputer 56a and is fixed by the molding material 78 that molds the microcomputer 56a. there is Thus, in the power tool 51 , the lead wire 58 can be arranged such that the microcomputer 56 a and the lead wire 58 are separated by the spacer 43 . Therefore, the power tool 51 can reduce the emission of electromagnetic noise from the power tool 51 without using a component that absorbs electromagnetic noise.

In the embodiments described above, the spacer 43 corresponds to the blocking portion.
(Ninth embodiment)
A ninth embodiment of the present disclosure will be described below with reference to the drawings.

The power tool 201 of the ninth embodiment includes a main body housing 202, a battery pack 203, an integrated motor 204, a switch 205, and lead wires 206 and 207, as shown in FIG.

A body housing 202 forms an outer shell of the power tool 201 . The body housing 202 is formed by a receiving side housing 211 and a covering side housing. That is, the body housing 202 accommodates the integrated motor 204, the switch 205, and the lead wires 206 and 207 by fitting the receiving side housing 211 with the covering side housing. Note that FIG. 13 shows the receiving side housing 211 but does not show the covering side housing.

The battery pack 203 is detachably attached to the body housing 202 and supplies DC power to the integrated motor 204 .
The integrated motor 204 receives power supply from the battery pack 203 and rotates to generate driving force for driving a tip tool (not shown). Integrated motor 204 includes a metal case 216 that houses the components of the motor therein. Therefore, the electromagnetic noise emitted from the motor components accommodated inside the metal case 216 propagates to the metal case 216 .

A switch 205 is installed in the current path between the battery pack 203 and the integrated motor 204 . The switch 205 is in either an ON state in which current flows between the battery pack 203 and the integrated motor 204 or an OFF state in which no current flows between the battery pack 203 and the integrated motor 204. driven as

A lead wire 206 electrically connects between the + terminal of the integrated motor 204 and the switch 205 . A lead wire 207 electrically connects between the - terminal of the integrated motor 204 and the switch 205 .

The receiving side housing 211 includes ribs 221 , 222 , 223 , 224 and 225 formed to protrude from the inner wall of the receiving side housing 211 .
The ribs 221, 222, and 223 are arranged so as to face the terminal installation surface 216a on which the + terminal and the - terminal are installed in the metal case 216 and to be aligned along the direction parallel to the terminal installation surface 216a. be done.

The ribs 224 and 225 are farther from the terminal mounting surface 216a than the ribs 221, 222, and 223 and are arranged so as to be aligned along the direction perpendicular to the terminal mounting surface 216a.
The lead wire 206 extends from the + terminal through between the ribs 221 and 222 and between the ribs 224 and 225 to reach the switch 205 . The lead wire 207 extends from the - terminal through between the ribs 222 and 223 and between the ribs 224 and 225 to reach the switch 205 .

The power tool 201 configured as described above includes an integrated motor 204 , lead wires 206 and 207 , and ribs 224 and 225 . Integrated motor 204 emits electromagnetic noise. Leads 206, 207 are configured to transmit electrical energy. Ribs 224 , 225 are positioned between at least a portion of leads 206 , 207 and integrated motor 204 to block access of at least a portion of leads 206 , 207 to integrated motor 204 .

Thus, in power tool 201 , ribs 224 and 225 prevent at least a portion of leads 206 and 207 from approaching integrated motor 204 . Therefore, the power tool 201 can prevent the electromagnetic noise generated by the integrated motor 204 from being transmitted to the core wires of the lead wires 206 and 207 . That is, the power tool 201 prevents the electromagnetic noise emitted from the integrated motor 204 from propagating to the lead wires 206 and 207 on which the electromagnetic noise is not superimposed and being emitted using the lead wires 206 and 207 as antennas. The occurrence can be suppressed. As a result, the power tool 201 can reduce the emission of electromagnetic noise from the power tool 201 without using a component that absorbs electromagnetic noise.

In the embodiment described above, the integrated motor 204 corresponds to the noise source, and the ribs 224 and 225 correspond to the blocker.
(Tenth embodiment)
A tenth embodiment of the present disclosure will be described below with reference to the drawings.

An electric power tool 251 of the tenth embodiment includes a body housing 252, a battery pack 253, a motor 254 with a carbon brush, a switch 255, and lead wires 256 and 257, as shown in FIG.

A body housing 252 forms an outer shell of the power tool 251 . The body housing 252 is formed by a receiving side housing 261 and a covering side housing. That is, the body housing 252 accommodates the motor 254 with the carbon brush, the switch 255 and the lead wires 256 and 257 by fitting the receiving side housing 261 so as to cover the receiving side housing 261 . Note that FIG. 14 shows the receiving side housing 261 but does not show the covering side housing.

The battery pack 253 is detachably attached to the body housing 252 and supplies DC power to the motor 254 with a carbon brush.
The motor 254 with a carbon brush rotates by being supplied with power from the battery pack 253 and generates a driving force for driving a tip tool (not shown). The carbon brushed motor 254 includes a carbon brush 266 and a commutator 267 . The motor 254 with carbon brush emits electromagnetic noise due to commutation sparks generated between the carbon brush 266 and the commutator 267 . That is, carbon brush 266 and commutator 267 are noise sources.

A switch 255 is installed in the current path between the battery pack 253 and the motor 254 with carbon brushes. The switch 255 is in either an ON state in which current flows between the battery pack 253 and the carbon brush motor 254, or an OFF state in which no current flows between the battery pack 253 and the carbon brush motor 254. is driven to be

A lead wire 256 electrically connects between the + terminal of the carbon brush motor 254 and the switch 255 . A lead wire 257 electrically connects between the - terminal of the motor 254 with carbon brush and the switch 255 .

The receiving side housing 261 includes ribs 271 , 272 , 273 , 274 , 275 and 276 formed to protrude from the inner wall of the receiving side housing 261 .
The ribs 271, 272, 273, and 274 are aligned in a direction parallel to the terminal mounting surface 266a on which the + terminal and the - terminal are mounted on the carbon brush 266, facing the terminal mounting surface 266a. placed in

Ribs 275 and 276 are farther from terminal mounting surface 266a than ribs 271, 272, 273 and 274 and are arranged so as to be aligned along a direction perpendicular to terminal mounting surface 266a.

The lead wire 256 extends from the + terminal through between the ribs 271 and 272 and between the ribs 275 and 276 to reach the switch 255 . The lead wire 257 extends from the - terminal through between the ribs 273 and 274 and between the ribs 275 and 276 to reach the switch 255 .

The power tool 251 configured in this manner includes a carbon brush 266 and a commutator 267, lead wires 256 and 257, and ribs 275 and 276. Carbon brushes 266 and commutator 267 emit electromagnetic noise. Leads 256, 257 are configured to transmit electrical energy. Ribs 275, 276 are disposed between at least a portion of leads 256, 257 and carbon brushes 266 and commutator 267 to prevent at least a portion of leads 256, 257 from approaching carbon brushes 266 and commutator 267. .

Thus, in power tool 251 , ribs 275 and 276 prevent at least portions of lead wires 256 and 257 from approaching carbon brush 266 and commutator 267 . As a result, the power tool 251 can reduce the emission of electromagnetic noise from the power tool 251 without using a component that absorbs electromagnetic noise.

In the embodiment described above, the carbon brush 266 and the commutator 267 correspond to noise sources, and the ribs 275 and 276 correspond to blocking portions.
(Eleventh embodiment)
An eleventh embodiment of the present disclosure will be described below with reference to the drawings.

An electric power tool 301 of the eleventh embodiment includes a body housing 302, an integrated motor 303, and lead wires 304 and 305, as shown in FIG.
A body housing 302 forms an outer shell of the power tool 301 . The body housing 302 is formed by a receiving side housing 311 and a covering side housing. That is, the body housing 302 accommodates the integrated motor 303 and the lead wires 304 and 305 inside by fitting the receiving side housing 311 with the covering side housing. Note that FIG. 15 shows the receiving side housing 311 but does not show the covering side housing.

The integrated motor 303 receives power supply from a battery pack (not shown) and rotates to generate driving force for driving a tip tool (not shown). Integrated motor 303 includes a metal case 316 that houses the components of the motor therein. Therefore, the electromagnetic noise emitted from the motor components housed inside the metal case 316 propagates to the metal case 316 .

One end of the lead wire 304 is connected to the + terminal of the integrated motor 303 . One end of the lead wire 305 is connected to the - terminal of the integrated motor 303 .
The receiving side housing 311 includes ribs 321 and 322 formed to protrude from the inner wall of the receiving side housing 311 . Ribs 321 and 322 are installed such that metal case 316 is positioned between ribs 321 and 322 .

The power tool 301 configured as described above includes an integrated motor 303 , lead wires 304 and 305 , and ribs 321 and 322 . Integrated motor 303 emits electromagnetic noise. Leads 304, 305 are configured to transmit electrical energy. Ribs 321 , 322 are positioned between at least a portion of leads 304 , 305 and integrated motor 303 to block access of at least a portion of leads 304 , 305 to integrated motor 303 .

Thus, in power tool 301 , ribs 321 and 322 prevent at least a portion of leads 304 and 305 from approaching integrated motor 303 . As a result, the power tool 301 can reduce the emission of electromagnetic noise from the power tool 301 without using a component that absorbs electromagnetic noise.

In the embodiment described above, the integrated motor 303 corresponds to the noise source, and the ribs 321 and 322 correspond to the blocking portion.
(12th embodiment)
A twelfth embodiment of the present disclosure will be described below with reference to the drawings.

A power tool 351 of the twelfth embodiment includes a body housing 352, a motor 353 with a carbon brush, and lead wires 354 and 355, as shown in FIG.
A body housing 352 forms an outer shell of the power tool 351 . The body housing 352 is formed by a receiving side housing 361 and a covering side housing. That is, the body housing 352 accommodates the motor 353 with the carbon brush and the lead wires 354 and 355 by fitting the receiving side housing 361 so as to cover the receiving side housing 361 with the covering side housing. Note that FIG. 16 shows the receiving side housing 361 but does not show the covering side housing.

The motor 353 with a carbon brush is powered by a battery pack (not shown) and rotates to generate driving force for driving a tip tool (not shown). The carbon brushed motor 353 includes a carbon brush 366 and a commutator 367 . The motor 353 with carbon brush emits electromagnetic noise due to commutation sparks generated between the carbon brush 366 and the commutator 367 . That is, carbon brush 366 and commutator 367 are noise sources.

One end of the lead wire 354 is connected to the + terminal of the motor 353 with carbon brush. One end of the lead wire 355 is connected to the - terminal of the motor 353 with carbon brush.
The receiving side housing 361 includes ribs 371 and 372 formed to protrude from the inner wall of the receiving side housing 361 . Ribs 371 and 372 are installed such that carbon brush 366 and commutator 367 are positioned between rib 371 and rib 372 .

The power tool 351 configured as described above includes a carbon brush 366 and a commutator 367 , lead wires 354 and 355 , and ribs 371 and 372 . Carbon brushes 366 and commutator 367 emit electromagnetic noise. Leads 354, 355 are configured to transmit electrical energy. Ribs 371 and 372 are disposed between at least portions of leads 354 and 355 and carbon brushes 366 and commutator 367 to prevent at least portions of leads 354 and 355 from approaching carbon brushes 366 and commutator 367. .

Thus, in power tool 351 , ribs 371 and 372 prevent at least portions of lead wires 354 and 355 from approaching carbon brush 366 and commutator 367 . As a result, the power tool 351 can reduce emission of electromagnetic noise from the power tool 351 without using a component that absorbs electromagnetic noise.

In the embodiment described above, the carbon brush 366 and the commutator 367 correspond to noise sources, and the ribs 371 and 372 correspond to blocking portions.
(13th embodiment)
A thirteenth embodiment of the present disclosure will be described below with reference to the drawings. Note that in the thirteenth embodiment, portions different from the eleventh embodiment will be described. The same code|symbol is attached|subjected about a common structure.

The power tool 301 of the thirteenth embodiment differs from the eleventh embodiment in that the ribs 321 and 322 are omitted and the spacer 326 is added.
As shown in FIGS. 17 and 18, the spacer 326 is a member formed in a cylindrical shape, and accommodates the metal case 316 of the integrated motor 303 therein.

The power tool 301 configured as described above includes an integrated motor 303 , lead wires 304 and 305 , and a spacer 326 . Integrated motor 303 emits electromagnetic noise. Leads 304, 305 are configured to transmit electrical energy. Spacer 326 is positioned between at least a portion of leads 304 , 305 and integrated motor 303 to block at least a portion of leads 304 , 305 from approaching integrated motor 303 .

Thus, in power tool 301 , spacer 326 prevents at least a portion of leads 304 and 305 from approaching integrated motor 303 . As a result, the power tool 301 can reduce the emission of electromagnetic noise from the power tool 301 without using a component that absorbs electromagnetic noise.

In the embodiments described above, the spacer 326 corresponds to the blocking portion.
An embodiment of the present disclosure has been described above, but the present disclosure is not limited to the above embodiment, and can be implemented in various modifications.

For example, in the first, second, and third embodiments, the ribs are formed so as to protrude from the inner wall of the cover-side housing. However, instead of the ribs, a separate member such as a sponge may be attached to the cover-side housing to prevent the lead wires from coming into contact with the controller.

In the above-described second embodiment, the portion of the rib 71 in contact with the lead wire 58 is formed to have an acute angle. However, the corner portion of the rib 71 contacting the lead wire 58 may be rounded (that is, rounded).

In the seventh embodiment, the lead wire 58 is passed through the back side of the controller case 77 . However, as shown in FIGS. 19 and 20, when the controller 56 is arranged in close proximity to the receiving side housing 61, there is a gap between the controller 56 and the receiving side housing 61 (that is, the back side of the controller 56). The lead wire 58 cannot be placed in the Therefore, the lead wires 58 are arranged on the front side of the controller 56 . In this case, the power tool 51 may be provided with ribs 79 . The rib 79 is arranged on the front side of the controller 56 so as to face the microcomputer 56 a mounted inside the controller 56 . Thereby, the rib 79 can prevent the lead wire 58 installed near the controller 56 from approaching the microcomputer 56a.

In the power tool 51 configured as described above, the microcomputer 56a, the lead wire 58 and the rib 79 are installed in the receiving side housing 61, and the rib 79 is arranged to face the microcomputer 56a. As a result, the rib 79 of the power tool 51 prevents the lead wire 58 from approaching the microcomputer 56a. Therefore, the power tool 51 can reduce the emission of electromagnetic noise from the power tool 51 without using a component that absorbs electromagnetic noise. Incidentally, the rib 79 corresponds to a blocking portion.

In the sixth embodiment, the form in which the spacer 41 made of metal or resin is attached to the surface of the controller 6 is shown. However, instead of the spacer 41, a noise suppression sheet may be attached. Further, as shown in FIG. 21, a spacer 45 such as a tube may be wound around the lead wire 8 to secure the distance between the core wire of the lead wire 8 and the controller 6 . In the power tool 1 configured as described above, the spacer 45 covers the lead wire 8 . Accordingly, in the power tool 1 , the lead wire 8 can be arranged such that the microcomputer 6 a and the lead wire 8 are separated by the spacer 45 . Therefore, the power tool 1 can reduce the emission of electromagnetic noise from the power tool 1 without using a component that absorbs electromagnetic noise. Note that the spacer 45 corresponds to a blocking portion .

Alternatively, a metal foil may be wrapped around the lead wire to shield noise from the noise source. Furthermore, the shielding may be strengthened by connecting the metal foil to the metal parts such as the gear housing, the negative terminal, the ground of the controller, and the like.
The technology of the present disclosure includes, for example, an electric hammer, an electric hammer drill, an electric drill, an electric screwdriver, an electric wrench, an electric grinder, an electric circular saw, an electric reciprocating saw, an electric jigsaw, an electric cutter, an electric chainsaw, an electric planer, an electric nailer (tack driving It can be applied to various electric tools such as electric hedge trimmers, electric lawn mowers, electric lawn clippers, electric brush cutters, electric cleaners, electric blowers, electric sprayers, electric spreaders, and electric dust collectors.
In the above embodiments, the noise source is a microcomputer or a motor, but the noise source may be a switching power supply, a motor drive circuit (inverter), or the like.

A plurality of functions possessed by one component in the above embodiment may be implemented by a plurality of components, or a function possessed by one component may be implemented by a plurality of components. Also, a plurality of functions possessed by a plurality of components may be realized by a single component, or a function realized by a plurality of components may be realized by a single component. Also, part of the configuration of the above embodiment may be omitted. Also, at least part of the configuration of the above embodiment may be added or replaced with respect to the configuration of the other above embodiment.

1, 51, 101, 201, 251, 301, 351... electric tools, 6a, 56a, 131... microcomputers, 21, 71, 73, 75, 79, 121, 224, 225, 275, 276, 321, 322, 371 , 372... Rib 41, 43, 45, 326... Spacer 204, 303... Integrated motor 266, 366... Carbon brush 267, 367... Commutator

Claims (1)

a power tool,
a noise source that emits electromagnetic noise;
a lead configured to transmit an electrical signal or electrical energy;
a blocking unit disposed between at least a portion of the lead wire and the noise source to block the at least a portion of the lead wire from approaching the noise source;
a body housing configured to form an outer shell of the power tool and accommodate the noise source, the lead wire, and the blocking portion;
The body housing includes a receiving side housing and a covering side housing that is fitted so as to cover the receiving side housing,
The blocking portion is formed to protrude from an inner wall of the covering-side housing,
The blocking portion does not face the noise source when the receiving side housing and the covering side housing are not fitted together and the noise source is installed in the receiving side housing. arranged to face the noise source when the housing and the cover-side housing are fitted together ;
When the receiving side housing and the covering side housing are fitted together and the blocking section is arranged to face the noise source, the lead wire is connected to the covering side housing while being in contact with the blocking section. Power tool positioned to bypass the noise source in a direction away from the power tool.

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