CN117979603A - Control assembly and electric tool - Google Patents
Control assembly and electric tool Download PDFInfo
- Publication number
- CN117979603A CN117979603A CN202410200717.4A CN202410200717A CN117979603A CN 117979603 A CN117979603 A CN 117979603A CN 202410200717 A CN202410200717 A CN 202410200717A CN 117979603 A CN117979603 A CN 117979603A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- extension section
- control assembly
- packaging box
- wiring part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004806 packaging method and process Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 4
- 230000005540 biological transmission Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- WABPQHHGFIMREM-RNFDNDRNSA-N lead-211 Chemical compound [211Pb] WABPQHHGFIMREM-RNFDNDRNSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention relates to a control assembly, which comprises a packaging box and a circuit board arranged on the packaging box, wherein an electronic element is arranged on the circuit board, the control assembly comprises a wiring part arranged on the circuit board, the wiring part and the electronic element are respectively arranged on two sides of the circuit board, and an electric tool using the control assembly has the advantages of high wiring efficiency and good safety performance.
Description
[ Technical field ]
The present invention relates to power tools, and particularly to a control assembly and a power tool using the same.
[ Background Art ]
A brushless electric tool is a tool that drives a motor to rotate through a controller to work on a workpiece, and among them, a small brushless electric tool has the advantages of compact structure and easy holding. In order to ensure efficient and stable operation of the motor, excellent electrical connectivity should be provided between the motor and the controller, and typically, the motor and the controller are connected by wires.
However, in the case of a small-sized brushless power tool, the space inside the housing is small, so that it is relatively difficult to wire the small-sized brushless power tool. In the existing wiring mode, the wires at the controller are connected with the circuit board in a welding mode, and the wires and the IGBT and other electronic elements are located on the same side of the circuit board, so that the risks of wire accumulation and wire leakage are often caused, besides, the accumulation of the wires can cause insufficient heat dissipation space at the controller, and the machine can be burnt out when serious, so that the health of a user is endangered.
In view of the above, it is determined that there is a need for an improved control assembly and power tool employing the same that overcomes the shortcomings of the prior art.
[ Summary of the invention ]
Aiming at the defects of the prior art, the invention aims to provide a control assembly and an electric tool using the control assembly, and the control assembly can enable the electric tool to have the advantages of high wiring efficiency and good safety performance.
The invention solves the problems in the prior art by adopting the following technical scheme: the control assembly comprises a packaging box and a circuit board arranged on the packaging box, wherein electronic elements are arranged on the circuit board, the control assembly comprises wiring parts arranged on the circuit board, and the wiring parts and the electronic elements are respectively arranged on two sides of the circuit board.
The further improvement scheme is as follows: the packaging box is provided with a protection part which is abutted to the circuit board, and the protection part is arranged on the periphery of the wiring part in a surrounding mode.
The protection component comprises a first extension section arranged towards the circuit board and a second extension section arranged away from the circuit board, and a containing cavity communicated with the first extension section and the second extension section is arranged between the first extension section and the second extension section.
The further improvement is that the first extension section is abutted against the surface of the circuit board, and the wiring part is accommodated in the accommodating cavity.
The invention solves the problems in the prior art by adopting the following technical scheme that the electric tool comprises a shell, a motor component and a control component, wherein the motor component is accommodated in the shell, the control component drives the motor component, the motor component is provided with a stator which is installed on the shell, the control component is provided with a packaging box which is installed on the shell and a circuit board which is fixed on the packaging box, the circuit board is connected with the stator and is provided with an electronic component, the control component comprises a wiring part which is installed on the circuit board, a wire of the stator is connected with the circuit board through the wiring part, and the wiring part and the electronic component are respectively installed on two sides of the circuit board.
The packaging box is provided with a protection part which is abutted against the circuit board, and the protection part is arranged on the periphery of the wiring part in a surrounding mode.
The protection component comprises a first extension section arranged towards the circuit board and a second extension section arranged away from the circuit board, and a containing cavity communicated with the first extension section and the second extension section is arranged between the first extension section and the second extension section.
The further improvement is that the first extension section is abutted against the surface of the circuit board, and the wiring part is accommodated in the accommodating cavity.
The packaging box is provided with a clamping part adjacent to the protection part, a clamping groove is formed in the clamping part, and the wire is accommodated in the clamping groove.
Compared with the prior art, the invention has the following beneficial effects:
1. The control assembly is arranged on two sides of the circuit board through the wiring part and the electronic element, when the lead led out from the stator is connected to the circuit board through the wiring part, the lead can be completely positioned on the opposite side of the electronic element, separation of the lead and the electronic element is realized, lead accumulation at the electronic element is avoided, and meanwhile, the heat dissipation space at the electronic element is increased.
2. The control assembly stores the wiring part through the protection part, and enables the first extension section of the protection part and the circuit board to be in butt joint to form a sealing structure, so that the sealing glue can be prevented from adhering to the wiring part when being poured into the circuit board, and the service life of the wiring part can be prolonged.
3. The control assembly is provided with the clamping part on the packaging box for accommodating the wires, so that the wiring flow can be simplified, the assembly efficiency can be improved, the risk of leakage of the wires can be reduced, and the safety performance of the electric tool can be improved.
[ Description of the drawings ]
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings:
FIG. 1 is a schematic perspective view of a power tool according to a preferred embodiment of the invention;
FIG. 2 is a schematic view of the control assembly and motor assembly of the power tool of FIG. 1;
FIG. 3 is a schematic view of the enclosure of the control assembly of FIG. 2;
FIG. 4 is a schematic view of the internal structure of the control assembly of FIG. 2;
fig. 5 is a schematic view of the control assembly of fig. 2 in a front-to-rear cut-away view.
Detailed description of the preferred embodiments
The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper", "lower", "front", "rear", etc., indicating an azimuth or a positional relationship are based on only the azimuth or the positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus/elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
The embodiment of the present invention relates to a power tool 100, and the power tool 100 is provided with a control assembly 3, and in the present embodiment, the power tool 100 is preferably an angle grinder 100, and is mainly used for polishing and cutting workpieces. The angle grinder 100 is adapted to an alternating current power supply and comprises a machine shell 1, a motor component 2, a transmission component and a top tool, wherein the motor component 2 is accommodated in the machine shell 1 and driven by a control component 3, the transmission component is driven by the motor component 2 to operate, and the top tool is installed at the end part of the transmission component. The top end tool of the angle grinder 100 may be a circular metal accessory such as a grinding disc, a cutting blade and the like, and the transmission assembly can drive the top end tool to rotate when operating so as to process a workpiece, and the angle grinder 100 is further provided with a shield 4 outside the top end tool so as to prevent a user from injuring hands by mistake when operating the angle grinder 100.
The casing 1 is divided into three parts, and is assembled by a first casing 11, a second casing 12 and a gear box 13. The motor assembly 2 is installed in the first shell 11, the first shell 11 is composed of a first cylindrical part 111 and a second cylindrical part 112 with unequal diameters, the outer diameter of the first cylindrical part 111 is larger than that of the second cylindrical part 112, when a user holds the angle grinder 100, the user can hold the second cylindrical part 112 by the palm, the back of the hand is abutted against the first cylindrical part 111, so that the angle grinder 100 can be prevented from being thrown off, and furthermore, the second cylindrical part 112 can obtain excellent operation comfort when the user operates due to the smaller outer diameter; the second shell 12 is detachably arranged at the right end of the first shell 11, the control component 3 is arranged in the second shell, and the front surface and the rear surface of the second shell are provided with air inlets 121; the gear box 13 is installed on the left side of the first shell 11, a transmission assembly is installed in the gear box, and an air outlet 131 is formed in the left side end face.
Referring to fig. 2 to 5, the motor assembly 2 is a brushless motor, which receives an electrical signal from the control assembly 3 to operate, and mainly includes a stator 21 installed in the first housing 11 and a rotor 22 penetrating the stator 21. The control assembly 3 is adapted to receive current from a power source and has a capsule 31 defining the shape of the body of the control assembly 3, the capsule 31 being secured in the second housing 12 by screws. In order to generate and output a control command for the motor assembly 2, the upper end face of the inner wall of the packaging box 31 is also provided with a circuit board 32, the upper surface of the circuit board 32 is defined to be a first surface 321, the lower surface of the circuit board 32 is defined to be a second surface 322, in order to control current, the circuit board 32 is provided with electronic elements 34, the electronic elements 34 are IGBTs, and the electronic elements 34 are divided into two rows and are respectively located on the front side and the rear side of the second surface 322.
During operation of the angle grinder 100, the electronic components 34 and other components on the circuit board 32 generate a large amount of heat, and therefore, the heat sink 33 is mounted between the two rows of electronic components 34, it should be noted that the heat sink 33 is mounted on the second surface 322, and the two rows of electronic components 34 are respectively attached to front and rear ends of the heat sink 33, so that the heat is transferred to the heat sink 33, and then the cooling air flowing in from the air inlet 121 takes away the heat on the heat sink when flowing through the heat sink 33, and finally flows out from the air outlet 131.
In order to enable the angle grinder 100 to operate efficiently and stably, there is an excellent electrical connectivity between the control unit 3 and the motor unit 2, and in this embodiment, the wires 211 led out from the three phases of the stator 21 are connected to the circuit board 32, and wiring between the control unit 3 and the motor unit 2 will be described.
With continued reference to fig. 2 to 5, the left rear region of the enclosure box 31 is provided with a protection member 311, the protection member 311 is in the shape of an elongated cuboid, which is embedded into the interior of the enclosure box 31 from the upper surface of the enclosure box 31 and is integrally formed with the enclosure box 31, the protection member 311 has a first extension section 311a provided downward and a second extension section 311b provided upward, specifically, the first extension section 311a is formed as a cuboid entity extending downward from the upper surface of the inner wall of the enclosure box 31, and the second extension section 311b is formed as a rectangular entity extending upward from the upper surface of the outer side of the enclosure box 31.
The first extension 311a and the second extension 311b are communicated by the accommodating chamber 311c, that is, the accommodating chamber 311c communicates the inside and the outside of the package can 31, and the number of the accommodating chambers 311c is three; the protection part 311 is provided with weight-reducing cavities 311d which are alternately arranged with the accommodating cavities 311c, namely, one weight-reducing cavity 311d is arranged between the two accommodating cavities 311c, or one accommodating cavity 311c is arranged between the two weight-reducing cavities 311d, the number of the weight-reducing cavities 311d is three or more, and the purpose of arranging the weight-reducing cavities 311d is to reduce the weight of the whole control assembly 3; the weight-reducing cavity 311d may extend downward from the second extension section 311b of the shielding member 311 and through the first extension section 311a, or the weight-reducing cavity 311d may extend downward from the second extension section 311b of the shielding member 311 and through the first extension section 311a.
On the front side of each accommodation chamber 311c, a clamping portion 312 protrudes from the outer upper surface of the package box 31, and a clamping groove 312a is formed on the clamping portion 312, and a gap formed in the front-rear direction by the clamping groove 312a is not larger than the diameter of the wire 211. The rear side and the front side of the inner wall of the package can 31 are respectively provided with a first support rib 313 and a second support rib 314, and the first support rib 313, the second support rib 314 and the first extension section 311a are flush in the up-down direction. The first mounting portion 315 and the second mounting portion 316 are provided on the right rear and left front of the inner wall of the package can 31, and the first mounting portion 315 and the second mounting portion 316 are each configured in the form of screw holes, and the number of screw holes is not limited to two but may be more than two of the first mounting portion 315 and the second mounting portion 316.
When the circuit board 32 is fixed in the packaging box 31, firstly, the first surface 321 of the circuit board 32 can be abutted against the first supporting rib 313, the second supporting rib 314 and the first extension section 311a, and then, the first mounting part 315 and the second mounting part 316 can be driven by screws, so that the initial fixation of the circuit board 32 can be realized; at this time, the lower opening of the accommodating chamber 311c is shielded, that is, only the upper opening of the accommodating chamber 311c communicates with the outside of the package tray 31.
To achieve connection between the circuit board 32 and the stator 21, the wiring portion 35 may be mounted on the circuit board 32, and the wiring portion 35 may be provided as a plug spring terminal or a screw terminal, in this embodiment, the wiring portion 35 is preferably a plug spring terminal, and the plug spring terminal 35 is located inside the accommodating cavity 311c and may be directly mounted on the surface of the circuit board 32. Further, the leads 211 led out from the three phases of the stator 21 may be fixed to the clamping grooves 312c of the clamping portions 312 corresponding to the accommodating chambers 311c, and the leads 211 may be connected to the plug spring terminals 35, respectively. The plug spring terminals 35 and the electronic components 34 are respectively located on the first surface 321 and the second surface 322 of the circuit board, when the wires 211 are connected to the circuit board 32, the wires 211 only pass through the upper part of the packaging box 31, but do not pass through the space on one side of the electronic components 34, so that the arrangement avoids the accumulation of the wires 211 at the electronic components 34, increases the heat dissipation space, and avoids the burning of the angle grinder 100 due to overhigh temperature.
The three clamping portions 312 are on the same straight line in the left-right direction, so that the wire 211 connected to the plug spring terminal 35 farthest from the stator 21 passes through the three clamping portions 312 in order, and the wire 211 is located at the bottommost end of the space formed by the three clamping grooves 312 a; similarly, the wire 211 connected to the plug spring terminal 35 located in the middle passes through two holding portions 312, the wire connected to the plug spring terminal 35 nearest to the stator 21 passes through one holding portion 312, and three wires 211 are stacked in the up-down direction. Such arrangement not only simplifies wiring and improves assembly efficiency, but also reduces risk of leakage of the lead 211 by the action of the clamping part 312, is easy to compound safety requirements, and avoids damaging health of users.
After the circuit board 32 is mounted, sealant is further poured on the second surface 322 of the circuit board to further fasten the circuit board and prevent dust from losing the circuit board, and the lower end of the accommodating cavity 311c is closed due to the abutting of the first extension section 311a of the protective component 311 and the first surface 321 of the circuit board 32, so that the sealant cannot enter the accommodating cavity 311c, and the attachment of the plug spring terminal 35 by the sealant is avoided, so that the stability of the plug spring terminal 35 in conducting the circuit board 32 and the stator 21 can be ensured.
The present invention is not limited to the above-described embodiments. Those of ordinary skill in the art will readily appreciate that many alternatives to the control assembly and power tool of the present invention are possible without departing from the spirit and scope of the present invention. The protection scope of the present invention is subject to the claims.
Claims (10)
1. A control assembly comprising a package box and a circuit board arranged on the package box, wherein the circuit board is provided with an electronic element; the method is characterized in that: the control assembly comprises a wiring part arranged on the circuit board, and the wiring part and the electronic element are respectively arranged on two sides of the circuit board.
2. The control assembly of claim 1, wherein: the packaging box is provided with a protection part which is abutted to the circuit board, and the protection part is arranged on the periphery of the wiring part in a surrounding mode.
3. The control assembly of claim 2, wherein: the protection part comprises a first extension section arranged towards the circuit board and a second extension section arranged away from the circuit board, and a containing cavity communicated with the first extension section and the second extension section is arranged between the first extension section and the second extension section.
4. A control assembly as claimed in claim 3, wherein: the first extension section is abutted with the surface of the circuit board, and the wiring part is accommodated in the accommodating cavity.
5. The control assembly of claim 4, wherein: the inner wall of the packaging box is at least provided with a first installation part and a second installation part, and the circuit board is installed on the first installation part and the second installation part through screws.
6. The electric tool comprises a shell, a motor component and a control component, wherein the motor component is accommodated in the shell, the control component drives the motor component, the motor component is provided with a stator which is installed in the shell, the control component is provided with a packaging box which is installed in the shell and a circuit board which is fixed in the packaging box, and the circuit board is connected with the stator and is provided with an electronic element; the method is characterized in that: the control assembly comprises a wiring part which is arranged on the circuit board, the lead wires of the stator are connected to the circuit board through the wiring part, and the wiring part and the electronic element are respectively arranged on two sides of the circuit board.
7. The power tool of claim 6, wherein: the packaging box is provided with a protection part which is abutted to the circuit board, and the protection part is arranged on the periphery of the wiring part in a surrounding mode.
8. The power tool of claim 7, wherein: the protection part comprises a first extension section arranged towards the circuit board and a second extension section arranged away from the circuit board, and a containing cavity communicated with the first extension section and the second extension section is arranged between the first extension section and the second extension section.
9. The power tool of claim 8, wherein: the first extension section is abutted with the surface of the circuit board, and the wiring part is accommodated in the accommodating cavity.
10. The power tool of claim 9, wherein: the packaging box is provided with a clamping part adjacent to the protection part, and the clamping part is provided with a clamping groove which is used for accommodating the lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410200717.4A CN117979603A (en) | 2024-02-23 | 2024-02-23 | Control assembly and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410200717.4A CN117979603A (en) | 2024-02-23 | 2024-02-23 | Control assembly and electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117979603A true CN117979603A (en) | 2024-05-03 |
Family
ID=90857472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410200717.4A Pending CN117979603A (en) | 2024-02-23 | 2024-02-23 | Control assembly and electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117979603A (en) |
-
2024
- 2024-02-23 CN CN202410200717.4A patent/CN117979603A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5979364B2 (en) | Portable blower | |
| JP5983929B2 (en) | Portable blower | |
| US10272558B2 (en) | Power tool having an elongated housing supporting a power module | |
| EP1832749B1 (en) | Air compressor | |
| CN109202822B (en) | Electric tool | |
| US20140015350A1 (en) | Power Tool | |
| JP4631663B2 (en) | Electric tool | |
| EP3733351B1 (en) | Power tool | |
| JP2018001361A (en) | Charging type electric tool | |
| CN109909548B (en) | Electric circular saw | |
| JP5030551B2 (en) | Inverter-integrated electric compressor | |
| CN212635318U (en) | Angle grinder | |
| CN113890239A (en) | Electric working machine | |
| JP2022012822A (en) | Electric working machine | |
| US20240090374A1 (en) | Power tool | |
| CN117979603A (en) | Control assembly and electric tool | |
| JP2017132006A (en) | Electric power tool | |
| CN211959097U (en) | Control device of electric tool and electric tool system | |
| EP4046754B1 (en) | Electric tool and electric control assembly thereof | |
| CN219380584U (en) | Electric tool | |
| CN215920046U (en) | Electric tool | |
| CN113747699B (en) | Electronic device and maintenance method for electronic device | |
| CN116937874A (en) | Electrical device and substrate unit | |
| CN219067976U (en) | Permanent magnet motor with efficient heat dissipation | |
| CN117817044A (en) | Cutting tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |