CN217883046U

CN217883046U - Motor, hand-held type electric tool

Info

Publication number: CN217883046U
Application number: CN202222247683.3U
Authority: CN
Inventors: 王添辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-11-22
Anticipated expiration: 2032-08-25

Abstract

The utility model relates to a motor, hand-held type electric tool, wherein the motor includes stator, rotor and switch installation position, but the rotor assembles in the stator with dead axle rotation. The switch mounting position is arranged on the outer peripheral edge of the stator and used for positioning and/or fixing the switch. And hand-held type electric tool includes shell body, work portion, above-mentioned motor and switch, and the motor assembly is in the shell body, and work portion assembles in the shell body and sets up by motor drive, and the switch is used for controlling the motor and opens and stop. The switch is assembled on the switch mounting position. The utility model discloses an assemble hand-held type electric tool's switch in the motor, avoided the switch to locate the shell body and lead to the shell body protrusion of switch position, and then just can avoid the shell body at the external diameter grow of switch position, the hand-held type electric tool user of being convenient for holds, reduces its physical demands, also can promote the user to hand-held type electric tool's the precision of controlling.

Description

Motor, hand-held type electric tool

Technical Field

The utility model relates to a motor and electric tool field with motor, concretely relates to motor, hand-held type electric tool.

Background

Hand-held electric tool, specifically like light-duty angle mill, electric grinder etc. its weight and size can direct influence user's physical demands and control the precision. If the electric tool which can be held by one hand and has low power requirement can be designed to be slimmer and lighter, the position of the switch left after the machine body is miniaturized can be reduced. To the current general way of little switch installation position be with the switch protrusion fuselage, the protruding part can influence and hold, and then leads to user's physical demands fast, control the not good scheduling problem of precision.

Specifically, the switch (reference numeral 9 in the publication) in the hand-held dc power tool disclosed in the chinese patent application with publication number CN114603522A, the slide switch (reference numeral 54 in the publication) in the electric hand-held power tool with the brake device disclosed in the chinese patent application with publication number CN101254588B, and the switch component (reference numeral 320 in the publication) in the power tool disclosed in the chinese patent application with publication number CN113119036A all adopt the switch structure of the protruding body (specifically, the protruding outer housing of the power tool), which also causes the outer diameter of the power tool at the position of the switch structure to increase, further affects the holding of the power tool, further causes the problems of fast physical strength consumption of the user, poor control accuracy, and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor, hand-held type electric tool to solve current hand-held type electric tool at switch position external diameter grow and the user's that leads to physical demands fast, control the not good scheduling problem of precision.

The utility model adopts the following technical scheme:

an electric motor comprises a stator, a rotor and a switch mounting position, wherein the rotor is assembled in the stator in a manner of fixing shaft rotation. The switch installation position is arranged on the periphery edge of the stator and used for positioning and/or fixing a switch, and the switch is a switch of an electric tool where the motor is located.

Further, the method comprises the following steps:

the stator comprises a stator core, a stator winding and a winding frame, wherein the winding frame is arranged at the end part of the stator core, and the stator winding is wound on the stator core through the winding frame. One or two of the winding frames are arranged. The switch mounting positions are arranged on the winding frames, and at least one winding frame is provided with a switch mounting position.

The winding frame comprises a wire frame main body and wire blocking blocks, wherein the wire frame main body is arranged in an annular mode, the wire blocking blocks are provided with a plurality of wires and are distributed on the wire frame main body, and a winding groove is formed between every two adjacent wire blocking blocks. And in the winding frame provided with the switch mounting position, the switch mounting position is arranged on the wire frame main body or the wire blocking block.

The switch mounting position is a convex and/or concave structure relative to the position of the switch mounting position.

The utility model provides a hand-held type electric tool, includes shell body, work portion, above-mentioned motor and switch, and the motor assembles in the shell body, and work portion assembles in the shell body and sets up by motor drive, and the switch is used for controlling the motor and opens and stop. The switch is assembled on the switch mounting position.

Further, the method comprises the following steps:

the switch extends towards the position of the outer shell, and the control end of the switch is arranged on one side of the switch, which deviates from the position of the stator.

The switch is a push-button switch. The shell body is provided with an operation hole which is a through hole structure penetrating through the shell body. The control hole is additionally provided with a keycap which is arranged to seal the control hole.

The stator comprises a stator core, a stator winding and a winding frame, wherein the winding frame is arranged at the end part of the stator core, and the stator winding is wound on the stator core through the winding frame. The two winding frames are respectively arranged at two ends of the stator core, the two winding frames are respectively a head winding frame and a tail winding frame, and the head winding frame is arranged close to the position of the working part.

The switch mounting position is arranged on one side and is arranged on the head wire frame.

The hand-held electric tool also comprises a heat dissipation part, wherein the heat dissipation part is provided with heat dissipation fan blades driven by the rotor to rotate. The cavity between the outer shell and the stator is a stator heat dissipation cavity, and the heat dissipation fan blades rotate to drive airflow to flow through the stator heat dissipation cavity. The switch extends from the switch mounting position to the interior of the stator heat dissipation cavity.

From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

the utility model discloses an assemble hand-held type electric tool's switch in the motor, avoided locating the shell body and leading to the shell body protrusion of switch position as the switch among the background art, and then just can avoid the outer diameter grow of shell body at switch position, the hand-held type electric tool user of being convenient for holds, reduces its physical demands, also can promote the user to hand-held type electric tool's the precision of controlling. Moreover, the thickness of switch is held to the cavity through between motor and the shell body, and space utilization in the shell body is higher and make shell body periphery edge more regular, promotes hand-held type electric tool's feel while more regular structure also helps promoting and holds the sense.

And assemble the switch in switch installation position, cooperation switch installation position is located the structure of stator, can separate components such as shell body and motor that neighbouring switch belongs to the position when hand-held type electric tool dismouting promptly, has lacked connecting switch's wire when hand-held type electric tool dismouting and has involved, and the dismouting is more convenient. And to the miniaturized hand-held type electric tool of fuselage, it is also more convenient to assemble the switch at the motor than assembling the switch in the less shell body inside of size.

The utility model discloses an among the further scheme, the utility model discloses locate injection moulding's bobbin with the switch installation position, only need change its mould a little and can realize, the realization cost of scheme is lower and more convenient. Moreover, in a handheld electric tool such as an angle grinder, the first bobbin position switch structure is more convenient for a user to hold and control the electric tool, i.e. the use quality of the handheld electric tool is further improved.

The existing electric tools increasingly use brushless motors, and the heat dissipation structure required by the brushless motors can dissipate heat through heat dissipation airflow flowing through the outside of the stator. And in the further scheme of the utility model, the utility model discloses a switch is by the structure that switch installation position extended to stator heat dissipation intracavity, utilizes the space in stator heat dissipation chamber to come the thickness of holding switch promptly, and then promotes the utilization efficiency of shell body inner space.

Drawings

Fig. 1 is a schematic view of a partial half-section structure of the hand-held electric tool of the present invention.

Fig. 2 is an exploded schematic view of the hand-held electric tool of the present invention.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

Referring to fig. 1 and 2, a hand-held electric tool includes an outer housing, a working portion 2, a motor, a heat dissipation portion, a control portion and a switch 5, wherein the heat dissipation portion, the control portion and the motor are assembled in the outer housing, the working portion 2 is assembled in the outer housing and is driven by the motor, the switch 5, the control portion and the motor are connected through a wire, and the switch 5 controls the motor to start and stop through a controller. Generally, the handheld electric tool can be various specific electric tools related to the background technology, the specific embodiment is illustrated by adopting a small-sized angle grinder structure, and electric tools with other structures can be combined by referring to the structure. Wherein the grinding sheets required for the operation of the working part 2 are omitted in the figure. Just the utility model discloses the motor can adopt to have common motor structure such as brush series excitation motor, brushless motor to increase as the basis the utility model discloses a switch installation position 33 structure. Specifically, the motor in the embodiment is specifically described by using a brushless motor structure, and the controller is a structure such as a driver of the brushless motor.

With continued reference to fig. 1 and 2, the motor includes a stator, a rotor 32, and a switch mounting portion 33, wherein the rotor 32 is rotatably fixed in the stator. The switch mounting portion 33 is provided on the outer peripheral edge of the stator, the switch mounting portion 33 is used for positioning and/or fixing the switch 5, and the switch 5 is assembled to the switch mounting portion 33. The switch mounting position 33 is a raised and/or recessed structure relative to the position of the switch, for example, the switch 5 is mounted on the switch mounting position 33 by gluing, and the switch mounting position 33 can be a recessed diagram for positioning identification. The switch mounting portion 33 may also be a seat assembled by a plurality of prism structures for accommodating the switch 5, and further, the switch mounting portion 33 may also be connected to the switch 5 by a structure such as a snap connection. In fig. 1, the rotor 32 and the switch 5 are not shown in cross section.

Referring to fig. 2, the outer housing includes a head end housing 11, a middle housing 12, and a tail end housing 13 connected in sequence, the working part 2 is assembled to the head end housing 11, the stator is located in the middle housing 12, and the control part is located in the tail end housing 13. The power output end of the rotor 32 extends to the head end housing 11 and is connected to the working part 2 in a transmission manner, such as a common bevel gear drive, which is not described herein again. The heat dissipating portion includes heat dissipating blades 41 and a flow guiding cover 42, the heat dissipating blades 41 are driven by the rotor 32 to rotate, the flow guiding cover 42 is sleeved outside the heat dissipating blades 41, the heat dissipating blades 41 are of an impeller structure, the heat dissipating blades 41 rotate to drive airflow to enter the flow guiding cover 42 from an opening on one side of the flow guiding cover 42 and to be blown out in a direction away from the position of the flow guiding cover 42 under the limitation of the middle shell 12. Specifically, the heat dissipating blades 41 and the air guide sleeve 42 are assembled on the middle housing 12, the air guide sleeve 42 is connected to the middle housing 12 along the peripheral edge thereof, which is connected to the end opening of the head end housing 11, and the power output end of the rotor 32 penetrates through the heat dissipating blades 41, extends to the head end housing 11, and is connected to the heat dissipating blades 41 to drive the heat dissipating blades to rotate.

Referring to fig. 1 and 2, the stator includes a stator core 311, a stator winding and a bobbin, the bobbin is disposed at an end of the stator core 311, and the stator winding is wound around the stator core 311 through the bobbin. One or two of the winding frames are arranged. The stator can set up packing paper structure one end promptly and set up the bobbin, also can both ends set up a bobbin respectively. Specifically, the number of the winding frames is two, the two winding frames are respectively disposed at two ends of the stator core 311, the two winding frames are respectively a first winding frame 312 and a last winding frame 313, and the first winding frame 312 is disposed adjacent to the position of the working portion 2. The switch mounting portion 33 may be provided on the outer periphery of the head bobbin 312, the stator core 311, or the tail bobbin 313. One switch 5 is provided, but if one motor structure is required to be adapted to various electric tool models, switch mounting positions 33 can be respectively arranged on the outer peripheries of the first wire frame 312, the stator core 311 and the tail wire frame 313, and the switch 5 can be mounted by selecting one switch mounting position 33 when the electric tool is assembled. Specifically, one switch mounting position 33 is provided, and the switch mounting position 33 is provided on the head wire frame 312. The stator winding, the controller, and the like are not shown in the drawings.

With continued reference to fig. 1 and 2, each of the winding frames includes a frame body 3101 and a wire blocking block 3102, the frame body 3101 is annularly disposed, the wire blocking block 3102 is disposed on the frame body 3101, and a plurality of winding slots are formed between adjacent wire blocking blocks 3102. In the bobbin provided with the switch mounting portion 33, the switch mounting portion 33 is provided on the bobbin main body 3101 or the thread blocking block 3102. That is, when the stator winding is wound in the inner winding manner, the wire blocking block 3102 is provided on the inner peripheral edge of the bobbin main body 3101, and the switch mounting portion 33 is provided on the outer peripheral edge of the bobbin main body 3101. When the stator winding adopts an outward winding mode, the wire blocking blocks 3102 are arranged on the peripheral edge of the bobbin main body 3101, and the switch mounting positions 33 are arranged on one side of one of the wire blocking blocks 3102, which is away from the position of the bobbin main body 3101. Specifically, in the present embodiment, the wire blocking block 3102 is provided on the inner peripheral edge of the wire frame body 3101, and the switch mounting portion 33 is provided on the outer peripheral edge of the wire frame body 3101. The switch mounting position 33 is a seat structure surrounded by a plurality of ribs located at the outer periphery of the wire rack main body 3101 of the first wire rack 312, and the switch 5 is accommodated in the seat structure of the switch mounting position 33. And the conductors connecting the switch 5 to the controller may pass through the stator core 311 in the orientation shown by the dashed conductor lines 51 in fig. 1.

With continued reference to fig. 1 and 2, the switch 5 extends toward the position of the outer housing, and the control end of the switch 5 is disposed on a side of the switch 5 away from the position of the stator. Correspondingly, in order to realize the operation and control of the operation and control end of the switch 5 by a user from the outside of the outer shell, the outer shell at the position of the switch 5 is correspondingly provided with a structure matched with the outer shell. Specifically, the outer shell is provided with a control hole 10, and the control hole 10 is a through hole structure penetrating through the outer shell. The actuation aperture 10 opens into a central housing 12. The switch 5 can be a switch 5 with a pressing, sliding, shifting rod structure and the like according to requirements, and the pressing, sliding, shifting rod structure and the like can extend out of the shell body from the control hole 10. In the present embodiment, the switch 5 is a push-button switch 5, and correspondingly, a key cap 101 is attached to the control hole 10, the key cap 101 is disposed to close the control hole 10, and a user presses the key cap 101 to deform the key cap 101 and press the push-button of the push-button switch 5 to control the switch 5. The cavity between the outer housing and the stator is a stator heat dissipation cavity 30, and the heat dissipation fan blades 41 rotate to drive the airflow to flow through the stator heat dissipation cavity 30, i.e. the cavity between the middle housing 12 and the stator is the stator heat dissipation cavity 30. The switch 5 extends from the switch mounting position 33 to the stator heat dissipation chamber 30. The outer periphery of the stator core 311 is provided with a plurality of tooth-shaped protrusions, the tooth-shaped protrusions are of a heat dissipation tooth structure for dissipating heat of the stator core 311, and the heat dissipation teeth are located in the stator heat dissipation cavity 30.

The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.

Claims

1. A motor comprises a stator and a rotor, wherein the rotor is assembled in the stator in a fixed-shaft rotating manner; the method is characterized in that: still include the switch installation position, the switch installation position is located stator periphery is followed, and the switch installation position is used for location and/or fixed switch, and this switch is the electric tool's at this motor place switch.

2. An electrical machine according to claim 1, wherein: the stator comprises a stator core, a stator winding and a winding frame, the winding frame is arranged at the end part of the stator core, and the stator winding is wound on the stator core through the winding frame; one or two winding frames are arranged; the switch mounting positions are arranged on the winding frames, and at least one winding frame is provided with a switch mounting position.

3. An electrical machine according to claim 2, wherein: the winding frame comprises a wire frame main body and wire blocking blocks, the wire frame main body is arranged in an annular shape, the wire blocking blocks are provided with a plurality of wire blocking blocks and are distributed on the wire frame main body, and a winding groove is formed between every two adjacent wire blocking blocks; and in the winding frame provided with the switch mounting position, the switch mounting position is arranged on the wire frame main body or the wire blocking block.

4. An electric machine as claimed in claim 1, characterized in that: the switch mounting position is a convex and/or concave structure relative to the position of the switch mounting position.

5. A hand-held electric tool comprises an outer shell, a working part, a motor and a switch, wherein the motor is assembled in the outer shell, the working part is assembled in the outer shell and driven by the motor, and the switch is used for controlling the motor to start and stop; the method is characterized in that: the electrical machine is according to any one of claims 1-4; the switch is assembled on the switch mounting position.

6. A hand held power tool according to claim 5, wherein: the switch extends towards the position where the outer shell is located, and the control end of the switch is arranged on one side, away from the position where the stator is located, of the switch.

7. A hand held power tool according to claim 6, wherein: the switch is a button switch; the shell is provided with an operation hole, and the operation hole is a through hole structure penetrating through the shell; the control hole is additionally provided with a key cap which is used for sealing the control hole.

8. A hand held power tool according to claim 5, wherein: the stator comprises a stator core, a stator winding and a winding frame, the winding frame is arranged at the end part of the stator core, and the stator winding is wound on the stator core through the winding frame; the two winding frames are respectively arranged at two ends of the stator core, the two winding frames are respectively a head winding frame and a tail winding frame, and the head winding frame is arranged close to the position of the working part.

9. A hand held power tool according to claim 8, wherein: the switch mounting position is provided with one, and the switch mounting position is arranged on the head line frame.

10. A hand held power tool according to claim 5, wherein: the rotor is driven to rotate by the rotor, and the rotor is driven to rotate by the rotor; the cavity between the outer shell and the stator is a stator heat dissipation cavity, and the heat dissipation fan blades rotate to drive airflow to flow through the stator heat dissipation cavity; the switch extends from the switch mounting position to the interior of the stator heat dissipation cavity.