CN211565782U - Electric tool - Google Patents

Abstract

The utility model provides an electric tool, this electric tool can reduce the release of the electromagnetic noise who comes from electric tool and do not use the part that absorbs the electromagnetic noise. The utility model discloses an electric tool has noise source, wire and stops the portion. The noise source emits electromagnetic noise. The wire is configured to transmit electrical signals or power. The blocking portion is disposed between at least a portion of the conductive wire and the noise source, and blocks at least a portion of the conductive wire from approaching the noise source.

Description

Electric tool

Technical Field

The utility model relates to an electric tool with electromagnetic noise's production source.

Background

Patent document 1 describes a technique of providing a ferrite core inside a case in order to reduce electromagnetic noise generated from an electric power tool.

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-213980

Disclosure of Invention

However, in the technique described in patent document 1, a special member having a function of absorbing electromagnetic noise needs to be added, and therefore, the manufacturing cost of the electric power tool increases.

The purpose of the utility model is to reduce the release of the electromagnetic noise from the electric tool and not use the part that absorbs the electromagnetic noise.

One aspect of the present invention is an electric power tool having a noise source, a wire, and a blocking portion. The noise source emits electromagnetic noise. The wire is configured to transmit electrical signals or power. The blocking portion is disposed between at least a portion of the conductive wire and the noise source, and blocks at least a portion of the conductive wire from approaching the noise source.

In the electric power tool of the present invention configured as described above, the prevention section prevents at least a part of the wire from approaching the noise source. Therefore, the electric tool of the present invention can suppress the occurrence of the situation in which the electromagnetic noise released from the noise source is transmitted to the core wire of the wire. That is, the electric power tool of the present invention can suppress the occurrence of the situation in which the electromagnetic noise released from the noise source is transmitted to the wire not superimposed with the electromagnetic noise and released as the antenna. Thus, the electric power tool of the present invention can reduce the release of electromagnetic noise from the electric power tool without using a member that absorbs electromagnetic noise.

In one aspect of the present invention, the noise-reducing device may further include a main body case having a covered-side case and a covered-side case, wherein the blocking portion is formed to protrude from an inner wall of the covered-side case and is disposed to oppose the noise source when the covered-side case and the covered-side case are fitted to each other. The main body housing forms an outer contour of the electric power tool and is configured to accommodate the noise source, the lead wire, and the blocking portion. The cover-side case is fitted so as to be covered by the cover-side case.

Thus, in the electric power tool of the present invention, even if the conductor opposes the noise source before the cover-side housing is covered with the cover-side housing, the conductor opposing the noise source can be pushed out by the stopper portion by covering the cover-side housing with the cover-side housing. Therefore, the electric tool of the present invention can configure the wire as a noise source and the wire is separated, and can reduce the emission of electromagnetic noise from the electric tool without using a member that absorbs electromagnetic noise.

In one aspect of the present invention, the case may have a main body case having a covered side case and a covered side case, and the main body case may be disposed in the order of the lead, the prevention portion, and the noise source from a side close to the bottom surface of the recess. The concave portion is formed in the covered side case.

Therefore, the electric tool of the utility model can utilize the stopping part to prevent the wire from approaching the noise source. Therefore, the electric tool of the present invention can reduce the release of electromagnetic noise from the electric tool without using a member that absorbs electromagnetic noise.

In an aspect of the present invention, the present invention may further include a main body case having a covered side case and a covered side case, wherein the noise source, the lead, and the prevention portion are provided in the covered side case, and the prevention portion is disposed opposite to the noise source.

Therefore, the electric tool of the utility model can utilize the stopping part to prevent the wire from approaching the noise source. Therefore, the electric tool of the present invention can reduce the release of electromagnetic noise from the electric tool without using a member that absorbs electromagnetic noise.

In one aspect of the present invention, the electric power tool may further include a noise source containing portion that is a component constituting the electric power tool and contains a noise source therein, and the blocking portion may be tightly joined to the noise source containing portion so as to oppose the noise source. Thus, the electric power tool of the present invention can configure the wire as a noise source and the wire is isolated by the block portion. Therefore, the electric tool of the present invention can reduce the release of electromagnetic noise from the electric tool without using a member that absorbs electromagnetic noise.

In one aspect of the present invention, the prevention portion may cover the periphery of the lead. Thus, the electric power tool of the present invention can configure the wire as a noise source and the wire is isolated by the block portion. Therefore, the electric tool of the present invention can reduce the release of electromagnetic noise from the electric tool without using a member that absorbs electromagnetic noise.

In an aspect of the present invention, the noise source may be molded, and the blocking portion is disposed opposite to the noise source and fixed by a molding material that molds the noise source. Thus, the electric power tool of the present invention can configure the wire as a noise source and the wire is isolated by the block portion. Therefore, the electric tool of the present invention can reduce the release of electromagnetic noise from the electric tool without using a member that absorbs electromagnetic noise.

Drawings

Fig. 1 is a sectional view showing the structure of an electric power tool according to embodiment 1.

Fig. 2 is a perspective view showing an internal structure of the cover-side case of embodiment 1.

Fig. 3 is a perspective view of the controller and the rib according to embodiment 1.

Fig. 4 is a sectional view showing the structure of the electric power tool according to embodiment 2.

Fig. 5 is a perspective view showing an internal structure of the cover-side case of embodiment 2.

Fig. 6 is a perspective view of the controller and the rib according to embodiment 2.

Fig. 7 is a diagram showing a state before and after the covered side case and the covering side case are fitted to each other in embodiment 3.

Fig. 8 is a perspective view showing the arrangement of the ribs, the controller, and the lead wires in embodiment 4.

Fig. 9 is a front view showing the arrangement of the rib, the controller, and the lead in embodiment 5.

Fig. 10 is a perspective view showing the arrangement of the pads, the controller, and the lead wires according to embodiment 6.

Fig. 11 is a diagram showing the arrangement of the controller box, the controller, and the wires according to embodiment 7.

Fig. 12 is a diagram showing the arrangement of the controller box, the controller, the pads, and the wires according to embodiment 8.

Fig. 13 is a view showing a schematic configuration of the electric power tool according to embodiment 9.

Fig. 14 is a diagram showing a schematic configuration of the electric power tool according to embodiment 10.

Fig. 15 is a view showing a schematic configuration of the electric power tool according to embodiment 11.

Fig. 16 is a view showing a schematic configuration of the electric power tool according to embodiment 12.

Fig. 17 is a front view of the integrated motor and the gasket of embodiment 13.

Fig. 18 is a side view of the integrated motor and the spacer according to embodiment 13.

Fig. 19 is a plan view showing the arrangement of ribs, a controller, and wires according to another embodiment.

Fig. 20 is a sectional view showing the arrangement of a rib, a controller, and a lead in another embodiment.

Fig. 21 is a perspective view showing the arrangement of the pads, the controller, and the lead wires according to another embodiment.

Description of the reference numerals

1. 51, 101, 201, 251, 301, 351 … electric tool, 6a, 56a, 131 … microcomputer, 21, 71, 73, 75, 79, 121, 224, 225, 275, 276, 321, 322, 371, 372 … rib, 41, 43, 45, 326 … gasket, 204, 303 … integrated motor, 266, 366 …, 267, 367 … commutator

Detailed Description

(embodiment 1)

Next, embodiment 1 of the present invention will be described with reference to the drawings.

As shown in fig. 1, the electric power tool 1 of the present embodiment includes a main body case 2, a battery pack 3, a motor 4, a power transmission mechanism 5, a controller 6, a tip tool 7, and a plurality of wires 8. In addition, the lead wire 8 is not shown in fig. 1, but is shown in fig. 3.

The electric power tool 1 is used to perform a chipping operation on a workpiece (for example, concrete) by reciprocating a tip tool 7 attached to the electric power tool 1 in a detachable manner.

The main body housing 2 forms the outer contour of the power tool 1. The main body case 2 is formed of a covered-side case 11 and a covered-side case 12. That is, the main body case 2 is configured such that the cover-side case 12 is fitted to the cover-side case 11 so as to cover the cover-side case 11, and the motor 4, the power transmission mechanism 5, the controller 6, and the lead wire 8 are housed therein. Further, the cover-side case 12 is not shown in fig. 1, but is shown in fig. 2. A grip portion 14 to be gripped by the operator is formed on the main body case 2 on the side opposite to the side on which the tip tool 7 is attached. The grip 14 is provided with a trigger switch 15 for inputting a drive command of the electric power tool 1 while the grip 14 is gripped by an operator.

Further, the main body case 2 is provided with air inlets for introducing air into the interior in the regions R1 and R2. Thus, the air flowing in from the intake port flows through the inside of the main body casing 2 as shown by the flow path CP.

The battery pack 3 is detachably attached to the main body case 2, and supplies a dc power to the motor 4 and the controller 6.

The motor 4 is rotated by power supplied from the battery pack 3, and generates a driving force for driving the tip tool 7.

The power transmission mechanism 5 converts the rotation of the motor 4 into a reciprocating motion, and transmits the reciprocating motion to the tool bit 7.

The controller 6 controls the driving of the motor 4 in accordance with a driving command input by an operator by operating the trigger switch 15.

The lead 8 is connected to components housed in the main body case 2, and transmits electric signals between the components.

As shown in fig. 2, the cover-side case 12 has a rib 21 formed to protrude from an inner wall 12a of the cover-side case 12. As shown in fig. 3, the controller 6 incorporates a microcomputer (hereinafter referred to as a "microcomputer") 6a having a CPU, a ROM, a RAM, and the like.

The rib 21 is disposed so as to face the microcomputer 6a on the surface of the controller 6 in a state where the cover-side case 11 and the cover-side case 12 are fitted to each other. Thereby, the wire 8, which is in contact with the surface of the controller 6 in a state of facing the microcomputer 6a, is pushed out by the rib 21. Thus, the lead wire 8 can be made not to oppose the micom 6 a.

The electric power tool 1 configured as described above includes the microcomputer 6a, the lead wire 8, and the rib 21. The microcomputer 6a discharges electromagnetic noise. The wire 8 is configured to transmit an electrical signal. The rib 21 is disposed between at least a part of the wire 8 and the microcomputer 6a, and prevents at least a part of the wire 8 from approaching the microcomputer 6 a.

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

In addition, the electric power tool 1 has a main body housing 2. The main body case 2 forms an outer contour of the electric power tool 1, and houses the microcomputer 6a, the lead wire 8, and the rib 21. The main body case 2 has a covered-side case 11 and a covered-side case 12. The cover-side case 12 is fitted so as to cover the cover-side case 11. The rib 21 is formed to protrude from the inner wall 12a of the cover-side case 12. The rib 21 is provided so as to face the microcomputer 6a when the cover-side case 11 and the cover-side case 12 are fitted to each other.

Thus, in the electric power tool 1, even if the lead wire 8 and the microcomputer 6a face each other before the cover-side case 12 is covered with the cover-side case 11, the lead wire 8 facing the microcomputer 6a can be pushed out by the rib 21 by covering the cover-side case 12 with the cover-side case 11. Therefore, the electric power tool 1 can dispose the lead wire 8 so that the microcomputer 6a and the lead wire 8 are separated, and can reduce the emission of electromagnetic noise from the electric power tool 1 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the microcomputer 6a corresponds to the noise source, and the rib 21 corresponds to the blocking portion.

(embodiment 2)

Next, embodiment 2 of the present invention will be described with reference to the drawings.

As shown in fig. 4, the electric power tool 51 of the present embodiment includes a main body case 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. In addition, the lead wire 58 is not shown in fig. 4, but is shown in fig. 6.

The electric power tool 51 is used to perform a cutting operation on a workpiece (for example, wood) by reciprocating a tip end tool 57 detachably attached to the electric power tool 51.

The body housing 52 forms the outer contour of the power tool 51. The main body case 52 is formed of a covered-side case 61 and a covered-side case 62. That is, the main body case 52 is configured such that the cover-side case 62 is fitted to the cover-side case 61 so as to cover the cover-side case 61, and the motor 54, the power transmission mechanism 55, the controller 56, and the lead wire 58 are housed therein. Further, the cover-side case 62 is not shown in fig. 4, but is shown in fig. 5. Further, a grip portion 64 to be gripped by a worker is formed on the main body case 52 on the side opposite to the side on which the tip tool 57 is attached. The grip 64 is provided with a trigger switch 65 for inputting a drive command of the electric power tool 51 while the grip 64 is gripped by an operator.

The battery pack 53 is detachably attached to the main body case 52, and supplies a dc power to the motor 54 and the controller 56.

The motor 54 is rotated by power supplied from the battery pack 53, and generates a driving force for driving the tip tool 57.

The power transmission mechanism 55 converts the rotation of the motor 54 into a reciprocating motion, and transmits the reciprocating motion to the tool bit 57.

The controller 56 controls the driving of the motor 54 in accordance with a driving command input by an operator by operating the trigger switch 65.

The lead wire 58 is connected to components housed in the main body case 52, and transmits electric signals between the components.

The cover-side housing 62 has, as shown in fig. 5, a rib 71 formed to protrude from an inner wall 62a of the cover-side housing 62. As shown in fig. 6, the controller 56 incorporates a microcomputer 56a having a CPU, a ROM, a RAM, and the like.

The rib 71 is disposed so as to face the microcomputer 56a on the surface of the controller 56 in a state where the cover-side case 61 and the cover-side case 62 are fitted to each other. Thereby, the wire 58, which is in contact with the surface of the controller 56 in a state of facing the microcomputer 56a, is pushed out by the rib 71. Thus, the lead wire 58 can be made not to oppose the micom 56 a.

The electric power tool 1 configured as described above includes the microcomputer 56a, the lead wire 58, and the rib 71. The microcomputer 56a discharges electromagnetic noise. The wires 58 are configured to transmit electrical signals. The rib 71 is disposed between at least a portion of the wire 58 and the microcomputer 56a to prevent at least a portion of the wire 58 from approaching the microcomputer 56 a.

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

In addition, the electric power tool 51 has a main body case 52. The main body case 52 forms an outer contour of the electric power tool 51, and houses the microcomputer 56a, the lead wire 58, and the rib 71. The main body case 52 has a covered-side case 61 and a covered-side case 62. The cover-side case 62 is fitted to the cover-side case 61 so as to cover the cover-side case 61. The rib 71 is formed to protrude from the inner wall 62a of the cover-side case 62. The rib 71 is provided to face the microcomputer 56a when the cover-side case 61 and the cover-side case 62 are fitted.

Thus, in the electric power tool 51, even if the lead wire 58 faces the microcomputer 56a before the cover-side housing 62 is covered with the cover-side housing 61, the lead wire 58 facing the microcomputer 56a can be pushed out by the rib 71 by covering the cover-side housing 62 with the cover-side housing 61. Therefore, the electric power tool 51 can dispose the lead wire 58 so that the microcomputer 56a and the lead wire 58 are separated, and can reduce the emission of electromagnetic noise from the electric power tool 51 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the microcomputer 56a corresponds to the noise source, and the rib 71 corresponds to the blocking portion.

(embodiment 3)

Next, embodiment 3 of the present invention will be described with reference to the drawings.

As shown in fig. 7, the electric power tool 101 of the present embodiment includes a main body housing 102, a motor 103, a controller 104, and a plurality of wires 105.

The body housing 102 forms the outer contour of the power tool 101. The main body case 102 is formed of a covered-side case 111 and a covered-side case 112. That is, the main body case 102 accommodates the motor 103, the controller 104, and the lead wire 105 therein by fitting the cover-side case 112 to the cover-side case 111 so as to cover the cover-side case 111.

The motor 103 is rotated by receiving power supply from a battery pack attached to the electric power tool 101, and generates driving force for driving a tool bit attached to the electric power tool 101.

The controller 104 is centrally configured with a microcomputer 131 (hereinafter referred to as a microcomputer 131) having a CPU, a ROM, a RAM, and the like. The controller 104 controls the driving of the motor 103 in accordance with a driving command input by an operator by operating a trigger switch.

The lead 105 is connected to a component housed in the main body case 102, and transmits an electric signal between the components.

The covered-side case 111 has a recess 116 and a rib 117. The recess 116 has a recessed shape for accommodating therein the motor 103 and a power transmission mechanism for transmitting a driving force of the motor 103 to a tool bit attached to the electric power tool 101. The rib 117 is a plate-like member formed to protrude from the inner wall of the recess 116 to the outside of the recess 116. The controller 104 is provided in a region outside the recess 116 on the surface of the rib 117.

The cover-side case 112 has a rib 121 formed to protrude from an inner wall 112a of the cover-side case 112. The rib 121 is disposed to face the microcomputer 131 mounted in the controller 104 in a state where the cover-side case 111 and the cover-side case 112 are fitted to each other. Thereby, the wire 105 facing the microcomputer 131 and contacting the surface of the controller 104 is pushed out by the rib 121. Thus, the wire 105 can be made to oppose to but not contact with the microcomputer 131 on the surface of the controller 104.

The electric power tool 101 configured as described above includes the microcomputer 131, the lead wire 105, and the rib 121. The micom 131 discharges electromagnetic noise. The wire 105 is configured to transmit an electrical signal. The rib 121 is disposed between at least a portion of the wire 105 and the microcomputer 131, and prevents at least a portion of the wire 105 from approaching the microcomputer 131.

As described above, in the power tool 101, the rib 121 prevents at least a portion of the wire 105 from approaching the micom 131. Therefore, the power tool 101 can suppress the occurrence of the electromagnetic noise generated by the microcomputer 131 from being transmitted to the core wire of the wire 105. That is, the electric power tool 101 can suppress the electromagnetic noise emitted from the microcomputer 131 from being transmitted to the lead wire 105 on which the electromagnetic noise is not superimposed and emitted with the lead wire 105 as an antenna. Thereby, the electric power tool 101 can reduce the emission of electromagnetic noise from the electric power tool 101 without using a member that absorbs electromagnetic noise.

In addition, the electric power tool 101 has a main body housing 102. The body housing 102 forms an outer contour of the power tool 101, and houses the controller 104, the lead wire 105, and the rib 121. The main body case 102 has a covered-side case 111 and a covered-side case 112. The cover-side case 112 is fitted to the cover-side case 111 so as to cover the cover-side case 111. The rib 121 is formed to protrude from the inner wall 112a of the cover-side case 112. The rib 121 is provided to face the microcomputer 131 when the cover-side case 111 and the cover-side case 112 are fitted.

Thus, in the electric power tool 101, even if the lead wire 105 and the microcomputer 131 face each other before the cover-side housing 112 is covered with the cover-side housing 111, the lead wire 105 facing the microcomputer 131 can be pushed out by the rib 121 by covering the cover-side housing 112 with the cover-side housing 111. Therefore, the power tool 101 can dispose the wire 105 so that the microcomputer 131 and the wire 105 are separated, and can reduce the emission of electromagnetic noise from the power tool 101 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the microcomputer 131 corresponds to the noise source, and the rib 121 corresponds to the blocking portion.

(embodiment 4)

Next, embodiment 4 of the present invention will be described with reference to the drawings. In embodiment 4, a description will be given of a portion different from embodiment 2. The same reference numerals are given to the common structures.

The electric power tool 51 according to embodiment 4 is different from that according to embodiment 2 in that the rib 71 is omitted and the rib 73 is added.

As shown in fig. 8, a recess 81 for accommodating the controller 56 is formed in the covered side case 61. The recess 81 is formed by a side surface 81a, a side surface 81b, and a bottom surface 81 c. The side surface 81a and the side surface 81b are disposed opposite to each other. The bottom surface 81c connects the side surface 81a and the side surface 81b to form a bottom of the recess 81.

The controller 56 is provided on the side surface 81a so as to contact the back surface of the controller 56.

The rib 73 is formed to protrude from the side surface 81b toward the surface of the controller 56. In addition, the rib 73 is formed to be positioned between the micom 56a and the bottom surface 81 c. Thus, the rib 73 prevents the lead wire 58 provided between the rib 73 and the bottom surface 81c from moving in a direction approaching the microcomputer 56 a.

In the electric power tool 51 configured as described above, the microcomputer 56a, the lead wire 58, and the rib 73 are provided in the recess 81, and the lead wire 58, the rib 73, and the microcomputer 56a are arranged in this order from the side close to the bottom surface 81c of the recess 81. Thus, the power tool 51 can prevent the lead wire 58 from approaching the microcomputer 56a by the rib 73. Therefore, the electric power tool 51 can reduce the emission of electromagnetic noise from the electric power tool 51 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the rib 73 corresponds to the stopper.

(embodiment 5)

Next, embodiment 5 of the present invention will be described with reference to the drawings. In embodiment 5, the differences from embodiment 2 will be described. The same reference numerals are given to the common structures.

The electric power tool 51 according to embodiment 5 is different from embodiment 2 in that the rib 71 is omitted and the rib 75 is added.

As shown in fig. 9, the electric power tool 51 has a rib 75, and the rib 75 protrudes from the inner wall of the covered side case 61 and is disposed to face the microcomputer 56a mounted in the controller 56.

The rib 75 is a member having an L-shaped cross section in a direction perpendicular to a projecting direction in which the rib 75 projects, and has a shape in which a parallel portion 75a arranged parallel to the surface of the controller 56 and a perpendicular portion 75b arranged perpendicular to the surface of the controller 56 are connected to each other. The rib 75 is formed such that a vertical portion 75b protrudes from the parallel portion 75a toward the surface of the controller 56.

In addition, the wire 58 disposed near the surface of the controller 56 is provided to detour with respect to the rib 75 so that the wire 58 does not exist between the controller 56 and the rib 75.

In the electric power tool 51 configured as described above, the microcomputer 56a, the lead wire 58, and the rib 75 are provided in the covered side case 61, and the rib 75 is disposed so as to face the microcomputer 56a of the controller 56.

Thus, the power tool 51 can prevent the lead wire 58 from approaching the microcomputer 56a by the rib 75. Therefore, the electric power tool 51 can reduce the emission of electromagnetic noise from the electric power tool 51 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the rib 75 corresponds to the positioning portion.

(embodiment 6)

Next, embodiment 6 of the present invention will be described with reference to the drawings. In embodiment 6, the differences from embodiment 1 will be described. The same reference numerals are given to the common structures.

The electric power tool 1 according to embodiment 6 is different from that according to embodiment 1 in that the rib 21 is omitted and the spacer 41 is added.

The spacer 41 is a plate-like 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. 10. Thus, the electric power tool 1 can prevent the lead wire 8 from approaching the microcomputer 6a by the spacer 41.

The electric power tool 1 configured as described above includes the controller 6, and the controller 6 is a component constituting the electric power tool 1 and includes the microcomputer 6a therein. And, the pad 41 is closely engaged with the controller 6 in a manner opposed to the microcomputer 6 a. Thus, the electric power tool 1 can dispose the lead wire 8 so that the microcomputer 6a and the lead wire 8 are separated by the spacer 41. Therefore, the electric power tool 1 can reduce the emission of electromagnetic noise from the electric power tool 1 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the controller 6 corresponds to the noise source containing section, and the pad 41 corresponds to the blocking section.

(7 th embodiment)

Next, embodiment 7 of the present invention will be described with reference to the drawings. In embodiment 7, the differences from embodiment 2 will be described. The same reference numerals are given to the common structures.

The electric power tool 51 according to embodiment 7 is different from embodiment 2 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, is formed in a substantially box shape having an open upper portion, and houses the controller 56 therein. In addition, the controller case 77 is filled with a molding material 78 inside. Thus, the controller 56 is enclosed inside the controller case 77. Also, the lead wire 58 connected to the controller 56 is provided so as to pass below the controller case 77 rather than above.

(embodiment 8)

Next, an embodiment 8 of the present invention will be described with reference to the drawings. In embodiment 8, the differences from embodiment 2 will be described. The same reference numerals are given to the common structures.

The electric power tool 51 according to embodiment 8 is different from embodiment 2 in that the rib 71 is omitted, the controller case 77 is added, and the gasket 43 is added.

As shown in fig. 12, the controller case 77 is made of metal, is formed in a substantially box shape having an open upper portion, and houses the controller 56 therein. In addition, the controller case 77 is filled with a molding material 78 inside. Thus, the controller 56 is enclosed 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 shape in which a parallel portion 43a arranged parallel to the surface of the controller 56 and perpendicular portions 43b and 43c arranged perpendicular to the surface of the controller 56 are connected to each other. The spacers 43 are formed such that the vertical portions 43b and 43c protrude from the parallel portion 43a toward the surface of the controller 56. The parallel portion 43a of the spacer 43 is disposed so as to face the microcomputer 56a, and the end portions of the perpendicular portions 43b and 43c are disposed in the molding material 78. Thereby, the gasket 43 is fixed to the controller case 77 so as to cover the microcomputer 56 a.

Thus, the wire 58 disposed near the surface of the controller 56 is routed with respect to the pad 43 so that the wire 58 does not exist between the controller 56 and the pad 43.

In the electric power tool 51 configured as above, the micom 56a is molded, and the pad 43 is disposed to be opposed to the micom 56a and is fixed by the molding material 78 molding the micom 56 a. Thus, the electric power tool 51 can dispose the lead wire 58 with the pad 43 so that the microcomputer 56a and the lead wire 58 are separated. Therefore, the electric power tool 51 can reduce the emission of electromagnetic noise from the electric power tool 51 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the spacer 43 corresponds to the stopper.

(embodiment 9)

Next, an embodiment 9 of the present invention will be described with reference to the drawings.

As shown in fig. 13, the electric power tool 201 according to embodiment 9 includes a main body case 202, a battery pack 203, an integral motor 204, a switch 205, and lead wires 206 and 207.

The body housing 202 forms the outer contour of the power tool 201. The main body case 202 is formed of a covered-side case 211 and a covered-side case. That is, the main body case 202 accommodates the integral motor 204, the switch 205, and the lead wires 206 and 207 therein by fitting the cover-side case to the cover-side case 211 so as to cover the cover-side case 211. Further, fig. 13 shows the covered-side case 211, but the covered-side case is not shown.

The battery pack 203 is detachably attached to the main body case 202, and supplies dc power to the integral motor 204.

The integral motor 204 is rotated by power supplied from the battery pack 203, and generates a driving force for driving a tip tool, not shown. The integral motor 204 has a metal case 216 that houses the components of the motor therein. Therefore, electromagnetic noise emitted from the motor component housed inside the metal case 216 is transmitted to the metal case 216.

The switch 205 is provided in an energization path between the battery pack 203 and the integral motor 204. The switch 205 is driven to be in either an on state in which current flows between the battery pack 203 and the integral motor 204 or an off state in which current does not flow between the battery pack 203 and the integral motor 204.

The lead wire 206 electrically connects the + terminal of the integral motor 204 and the switch 205. The lead wire 207 electrically connects the one-terminal of the integral motor 204 and the switch 205.

The covered-side case 211 has ribs 221, 222, 223, 224, 225 formed to protrude from the inner wall of the covered-side case 211.

The ribs 221, 222, 223 are arranged to face the terminal installation surface 216a on which the + terminal and the-terminal are installed in the metal case 216, and are aligned in a direction parallel to the terminal installation surface 216 a.

The ribs 224 and 225 are arranged farther from the terminal installation surface 216a than the ribs 221, 222, and 223 and are aligned in a direction perpendicular to the terminal installation surface 216 a.

The wire 206 extends from the + terminal, through between the rib 221 and the rib 222, and further through between the rib 224 and the rib 225 to the switch 205. From the-terminal, lead 207 extends between ribs 222 and 223, and between rib 224 and rib 225 to switch 205.

The electric power tool 201 configured as described above includes the integral motor 204, the lead wires 206 and 207, and the ribs 224 and 225. The integral motor 204 discharges electromagnetic noise. The conductors 206, 207 are configured to transmit electrical energy. The ribs 224 and 225 are disposed between at least a part of the leads 206 and 207 and the integral motor 204, and prevent at least a part of the leads 206 and 207 from approaching the integral motor 204.

As described above, in the electric power tool 201, the ribs 224, 225 prevent at least a part of the wires 206, 207 from approaching the integral motor 204. Therefore, the electric power tool 201 can suppress the electromagnetic noise generated by the integral motor 204 from being transmitted to the core wires of the lead wires 206 and 207. That is, the electric power tool 201 can suppress the electromagnetic noise emitted from the integral motor 204 from being transmitted to the conductive wires 206 and 207 on which the electromagnetic noise is not superimposed and emitted from the conductive wires 206 and 207 as an antenna. Thereby, the electric power tool 201 can reduce the emission of electromagnetic noise from the electric power tool 201 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the integral motor 204 corresponds to a noise source, and the ribs 224 and 225 correspond to the blocking portions.

(embodiment 10)

Next, a 10 th embodiment of the present invention will be described with reference to the drawings.

As shown in fig. 14, the electric power tool 251 according to embodiment 10 includes a main body case 252, a battery pack 253, a motor 254 with carbon brushes, a switch 255, and lead wires 256 and 257.

The body housing 252 forms the outer contour of the power tool 251. The main body case 252 is formed of a covered-side case 261 and a covered-side case. That is, the main body case 252 accommodates the motor 254 with carbon brushes, the switch 255, and the wires 256 and 257 therein by fitting the cover-side case to the cover-side case 261 so as to cover the cover-side case 261. Further, fig. 14 shows the covered-side case 261, but the covered-side case is not shown.

The battery pack 253 is detachably attached to the main body case 252, and supplies a dc power to the motor 254 with carbon brushes.

The motor 254 with carbon brushes is rotated by power supplied from the battery pack 253, and generates a driving force for driving a tip tool, not shown. The motor 254 with carbon brushes has carbon brushes 266 and a commutator 267. The motor 254 with carbon brushes emits electromagnetic noise due to rectified sparks generated between the carbon brushes 266 and the commutator 267. That is, the carbon brush 266 and the commutator 267 are noise sources.

The switch 255 is provided in an electrical path between the battery pack 253 and the motor 254 with carbon brushes. The switch 255 is driven to be in any one of an on state in which current flows between the battery pack 253 and the motor 254 with carbon brushes, and an off state in which current does not flow between the battery pack 253 and the motor 254 with carbon brushes.

A wire 256 electrically connects the + terminal of the motor 254 with carbon brushes to the switch 255. A wire 257 electrically connects a terminal of the motor 254 with a carbon brush and the switch 255.

The covered-side case 261 has ribs 271, 272, 273, 274, 275, 276 formed to protrude from the inner wall of the covered-side case 261.

The ribs 271, 272, 273, 274 are arranged so as to face the terminal installation surface 266a on which the + terminal and the-terminal are provided in the carbon brush 266, and are aligned in a direction parallel to the terminal installation surface 266 a.

The ribs 275, 276 are arranged farther from the terminal installation surface 266a than the ribs 271, 272, 273, 274, and are aligned in a direction perpendicular to the terminal installation surface 266 a.

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

The electric power tool 251 configured as described above includes the carbon brush 266 and the commutator 267, the wires 256 and 257, and the ribs 275 and 276. The carbon brush 266 and the commutator 267 emit electromagnetic noise. The wires 256, 257 are configured to transmit electrical energy. The ribs 275, 276 are disposed between at least a portion of the wires 256, 257 and the carbon brush 266 and the commutator 267 to prevent at least a portion of the wires 256, 257 from approaching the carbon brush 266 and the commutator 267.

As described above, in the electric power tool 251, the ribs 275, 276 prevent at least a portion of the wires 256, 257 from approaching the carbon brush 266 and the commutator 267. Thereby, the electric power tool 251 can reduce the emission of electromagnetic noise from the electric power tool 251 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the carbon brush 266 and the commutator 267 correspond to a noise source, and the ribs 275 and 276 correspond to stoppers.

(embodiment 11)

Next, an embodiment 11 of the present invention will be described with reference to the drawings.

As shown in fig. 15, an electric power tool 301 according to embodiment 11 includes a main body case 302, an integral motor 303, and lead wires 304 and 305.

The main body housing 302 forms the outer contour of the power tool 301. The main body case 302 is formed of a covered-side case 311 and a covered-side case. That is, the main body case 302 is configured such that the cover-side case is fitted to the cover-side case 311 so as to cover the cover-side case 311, and the integrated motor 303 and the lead wires 304 and 305 are housed therein. Further, fig. 15 shows the covered-side case 311, but the covered-side case is not shown.

The integral motor 303 is rotated by receiving power supply from a battery pack, not shown, and generates driving force for driving a tip tool, not shown. The integral motor 303 has a metal case 316 that accommodates components of the motor therein. Therefore, electromagnetic noise emitted from the motor component housed inside the metal case 316 is transmitted to the metal case 316.

One end of the lead 304 is connected to the + terminal of the integral motor 303. One end of the lead 305 is connected to a terminal of the integral motor 303.

The covered-side case 311 has ribs 321, 322 formed to protrude from the inner wall of the covered-side case 311. The ribs 321, 322 are arranged such that the metal bin 316 is located between the ribs 321 and 322.

The electric power tool 301 configured as described above includes the integral motor 303, the lead wires 304, 305, and the ribs 321, 322. The integral motor 303 discharges electromagnetic noise. The conductors 304, 305 are configured to transmit electrical energy. The ribs 321 and 322 are disposed between at least a part of the leads 304 and 305 and the integral motor 303, and prevent at least a part of the leads 304 and 305 from approaching the integral motor 303.

As described above, in the electric power tool 301, the ribs 321 and 322 prevent at least a part of the wires 304 and 305 from approaching the integral motor 303. Thereby, the electric power tool 301 can reduce the emission of electromagnetic noise from the electric power tool 301 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the integral motor 303 corresponds to a noise source, and the ribs 321 and 322 correspond to the blocking portions.

(embodiment 12)

Next, a 12 th embodiment of the present invention will be described with reference to the drawings.

As shown in fig. 16, an electric power tool 351 according to embodiment 12 includes a main body case 352, a motor 353 with carbon brushes, and lead wires 354 and 355.

The body case 352 forms an outer contour of the power tool 351. The main body case 352 is formed of a covered-side case 361 and a covered-side case. That is, the main body case 352 is fitted so that the cover-side case covers the cover-side case 361, thereby accommodating the motor 353 with carbon brushes and the lead wires 354 and 355 therein. Further, fig. 16 shows the covered-side case 361, but the covered-side case is not shown.

The motor 353 with carbon brushes is rotated by receiving power supply from a battery pack, not shown, and generates driving force for driving a tool bit, not shown. The motor 353 with carbon brushes has carbon brushes 366 and a commutator 367. The motor 353 with carbon brushes emits electromagnetic noise due to a rectifying spark generated between the carbon brushes 366 and the commutator 367. That is, the carbon brushes 366 and the commutator 367 are noise sources.

One end of the conductive line 354 is connected to the + terminal of the motor 353 with carbon brush. One end of the wire 355 is connected to a terminal of the motor 353 with a carbon brush.

The covered-side case 361 has ribs 371, 372 formed to protrude from the inner wall of the covered-side case 361. The ribs 371, 372 are provided such that the carbon brush 366 and the commutator 367 are located between the ribs 371 and 372.

The electric power tool 351 configured as described above includes the carbon brush 366, the commutator 367, the lead wires 354 and 355, and the ribs 371 and 372. The carbon brush 366 and the commutator 367 emit electromagnetic noise. The conductive lines 354, 355 are configured to transmit electrical energy. The ribs 371 and 372 are disposed between at least a part of the lead wires 354 and 355 and the carbon brushes 366 and the commutator 367, and prevent at least a part of the lead wires 354 and 355 from coming close to the carbon brushes 366 and the commutator 367.

As described above, in the electric power tool 351, the ribs 371, 372 prevent at least a part of the lead wires 354, 355 from approaching the carbon brush 366 and the commutator 367. Thus, the electric power tool 351 can reduce the emission of electromagnetic noise from the electric power tool 251 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the carbon brush 366 and the commutator 367 correspond to a noise source, and the ribs 371 and 372 correspond to stoppers.

(embodiment 13)

Next, embodiment 13 of the present invention will be described with reference to the drawings. In embodiment 13, a description will be given of a portion different from embodiment 11. The same reference numerals are given to the common structures.

The electric power tool 301 according to embodiment 13 differs from embodiment 11 in that the ribs 321 and 322 are omitted and the pad 326 is added.

As shown in fig. 17 and 18, the spacer 326 is a member formed in a cylindrical shape, and houses the metal case 316 of the integral motor 303 therein.

The electric power tool 301 configured as described above includes the integral motor 303, the lead wires 304, 305, and the pad 326. The integral motor 303 discharges electromagnetic noise. The conductors 304, 305 are configured to transmit electrical energy. The spacer 326 is disposed between at least a part of the leads 304 and 305 and the integral motor 303, and prevents at least a part of the leads 304 and 305 from approaching the integral motor 303.

As described above, in the electric power tool 301, the spacer 326 prevents at least a part of the lead wires 304, 305 from approaching the integral motor 303. Thereby, the electric power tool 301 can reduce the emission of electromagnetic noise from the electric power tool 301 without using a member that absorbs electromagnetic noise.

In the above-described embodiment, the packing 326 corresponds to the stopper.

While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made.

For example, in the above embodiments 1, 2, and 3, a mode in which a rib is formed to protrude from the inner wall of the cover-side case is shown. However, instead of the rib, another member such as a sponge may be attached to the cover-side case to prevent the lead from coming into contact with the controller.

In embodiment 2 described above, the rib 71 is formed in an acute angle shape at a portion contacting the lead wire 58. However, the corner portion of the rib 71 that contacts the lead wire 58 may be rounded (i.e., R-angled).

In the above-described embodiment 7, the lead wire 58 is passed through the rear surface side of the controller case 77. However, as shown in fig. 19 and 20, when the controller 56 is disposed in a state close to the covered-side case 61, the lead wire 58 cannot be disposed between the controller 56 and the covered-side case 61 (i.e., on the back side of the controller 56). Therefore, the wire 58 is arranged on the surface side of the controller 56. In this case, the power tool 51 may have the rib 79. The rib 79 is disposed on the front surface side of the controller 56 so as to face the microcomputer 56a mounted in the controller 56. This prevents the wire 58 provided in the vicinity of the controller 56 from approaching the microcomputer 56a by the rib 79.

In the electric power tool 51 configured as described above, the microcomputer 56a, the lead wire 58, and the rib 79 are provided in the covered side case 61, and the rib 79 is disposed so as to face the microcomputer 56 a. Thus, the power tool 51 can prevent the wire 58 from approaching the microcomputer 56a by the rib 79. Therefore, the electric power tool 51 can reduce the emission of electromagnetic noise from the electric power tool 51 without using a member that absorbs electromagnetic noise. The rib 79 corresponds to a stopper.

In the above-described embodiment 6, a mode 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. As shown in fig. 21, a spacer 45 such as a tube may be wound around the lead 8 to secure a distance between the core wire of the lead 8 and the controller 6. In the electric power tool 1 configured as described above, the spacer 45 covers the periphery of the lead wire 8. Thus, the electric power tool 1 can dispose the lead wire 8 so that the microcomputer 6a and the lead wire 8 are separated by the spacer 45. Therefore, the electric power tool 1 can reduce the emission of electromagnetic noise from the electric power tool 1 without using a member that absorbs electromagnetic noise. The spacer 45 corresponds to a positioning portion.

Further, a metal foil may be wound around the lead wire to shield noise from a noise source. Further, the shield may be reinforced by connecting the metal foil to a metal portion such as a gear case, a negative electrode terminal, a ground of the controller, and the like.

The technique of the present invention can be applied to various electric tools such as an electric hammer, an electric hammer 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 chain saw, an electric planer, an electric nailing machine (including a riveting machine), an electric hedge trimmer, an electric lawnmower, an electric lawn mower, an electric vacuum cleaner, an electric blower, an electric sprayer, an electric spreader, and an electric dust collector.

In the above embodiment, 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.

In the above embodiment, a plurality of functions of 1 component may be realized by a plurality of components, or 1 function of 1 component may be realized by a plurality of components. Further, a plurality of functions included in a plurality of components may be realized by 1 component, or 1 function realized by a plurality of components may be realized by 1 component. In addition, a part of the structure of the above embodiment may be omitted. Further, at least a part of the structure of the above-described embodiment may be added to or replaced with the structure of the other above-described embodiment.

Claims (7)

1. An electric power tool having:

a noise source that discharges electromagnetic noise; and

a wire configured to transmit electrical signals or power,

it is characterized in that the preparation method is characterized in that,

the noise-reducing member further includes a blocking portion that is disposed between at least a portion of the conductive wire and the noise source and blocks the at least a portion of the conductive wire from approaching the noise source.

2. The power tool of claim 1,

has a main body housing forming an outer contour of the electric power tool and configured to accommodate the noise source, the lead wire, and the blocking portion,

the main body case has a covered-side case and a covering-side case fitted to the covered-side case so as to cover the covered-side case,

the prevention portion is formed to protrude from an inner wall of the cover side case,

the blocking portion is configured to oppose the noise source when the covered-side case and the cover-side case are fitted.

3. The power tool of claim 1,

has a main body housing forming an outer contour of the electric power tool and configured to accommodate the noise source, the lead wire, and the blocking portion,

the main body case has a covered-side case and a covering-side case fitted to the covered-side case so as to cover the covered-side case,

the noise source, the lead wire, and the blocking portion are provided in a recess formed in the covered side case,

the noise source, the conductive wire, and the blocking portion are arranged in this order from the side close to the bottom surface of the recess portion.

4. The power tool of claim 1,

has a main body housing forming an outer contour of the electric power tool and configured to accommodate the noise source, the lead wire, and the blocking portion,

the main body case has a covered-side case and a covering-side case fitted to the covered-side case so as to cover the covered-side case,

the noise source, the lead wire, and the blocking portion are provided to the covered side case,

the prevention section is disposed opposite to the noise source.

5. The power tool of claim 1,

has a noise source containing part which is a component constituting the electric tool and contains the noise source therein,

the blocking portion is closely engaged with the noise source containing portion in a manner opposite to the noise source.

6. The power tool of claim 1,

the prevention portion covers the periphery of the lead.

7. The power tool of claim 1,

the source of said noise is molded in such a way that,

the prevention portion is disposed opposite to the noise source and fixed by a molding material that molds the noise source.

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