Electric tool and motor

Abstract

The utility model discloses an electric tool and a motor. The electric tool comprises a motor, a transmission mechanism and a temperature sensor, wherein the motor comprises a stator and a rotor; the stator comprises a stator lamination, an insulating end cover and a coil; the insulating end cover comprises an end cover main body and a plurality of winding teeth; the temperature sensor is placed on the first tooth surface of any winding tooth; the first tooth surface is a plane substantially perpendicular to a rotating shaft of the rotor. The temperature sensor is arranged on the winding teeth, a heat conduction path between the coil and the temperature sensor is removed, and the temperature sensor is in direct contact with the coil, so that the temperature change of the motor can be sensed in time, and the motor is protected in time; the influence of the external environment on the temperature sensor is eliminated, and the accurate protection of the motor is realized; besides, the temperature sensor is directly arranged on the winding teeth in advance, then the coil is wound on the winding teeth to wrap and fix the temperature sensor, an additional temperature sensor fixing structure is not needed, parts are reduced, and cost is low.

Description

Technical Field

[0001] The present application relates to a power tool, and more particularly to a power tool and a motor. Background Art

[0002] An angle grinder is a multi-functional cutting tool used for grinding, cutting, rust removal, polishing, grinding weld beads, cleaning weld roots, etc. of metal components. The angle grinder uses high-speed rotating thin working accessories, rubber working accessories, wire wheels, etc. to perform grinding, cutting, rust removal, and polishing operations on metal components. It has the advantages of easy use, high rotational speed, fast cutting speed, and fast grinding speed for welds.

[0003] For brushless motors and electronic controls, due to their high sensitivity to current, the conventional method is to protect the motor / electronic control through overcurrent protection. However, this method affects the heavy-load feel. Now, constant current control is achieved through the electronic control. But when the external load continues to increase, due to the input power limitation, the rotational speed drops significantly, and at this time, the overall heat dissipation of the machine becomes poor. To further protect the motor, an NTC is added to the motor to monitor the motor temperature rise and prevent failure caused by excessive motor temperature rise.

[0004] In the related art, an NTC is added to the outer surface of the iron core for protection. However, its disadvantages are as follows: ① The heat conduction path of the heating winding is too long, and the protection is not timely; ② It is greatly affected by the external temperature. When the external environmental temperature is too high, the hot air blows onto the NTC, causing the machine to easily enter temperature protection in advance, affecting the release of the overall machine performance.

[0005] This section provides background information related to the present application, which is not necessarily prior art. Summary of the Utility Model

[0006] An object of the present application is to solve or at least alleviate part or all of the above problems. To this end, an object of the present application is to provide a power tool and a motor.

[0007] To achieve the above object, the present application adopts the following technical solutions:

[0008] A power tool, comprising:

[0009] A motor, including a stator and a rotor;

[0010] A transmission mechanism configured to transmit the driving force generated by the rotation of the rotor to drive the working component to work;

[0011] A temperature sensor for detecting the temperature of the motor;

[0012] The stator includes stator laminations, insulating end caps provided at both ends of the stator laminations, and coils wound around the stator laminations and the insulating end caps;

[0013] The insulating end cover includes an end cover body and a plurality of winding teeth;

[0014] Wherein, the temperature sensor is placed on the first tooth surface of any one of the winding teeth;

[0015] The first tooth surface is a plane substantially perpendicular to the rotating shaft of the rotor.

[0016] In some embodiments, the winding tooth includes a tooth body and a tooth front end portion, and the tooth front end portion is in a flange shape relative to the tooth body; wherein, the surface of the tooth body substantially perpendicular to the rotating shaft is set as the first tooth surface.

[0017] In some embodiments, the insulating end cover further includes a surrounding portion, and an avoidance portion is provided on the surrounding portion to avoid the lead wire of the temperature sensor.

[0018] In some embodiments, the avoidance portion is set as a hole-like structure on the surrounding portion.

[0019] In some embodiments, a fixing coating is applied between the temperature sensor and the first tooth surface to fix the temperature sensor on the first tooth surface.

[0020] In some embodiments, the fixing coating includes fixing glue.

[0021] In some embodiments, the temperature sensor is in direct contact with the coil wound on the winding tooth.

[0022] A power tool includes:

[0023] A motor, including a stator and a rotor;

[0024] A transmission mechanism configured to transmit the driving force generated by the rotation of the rotor to drive a working component to work;

[0025] A temperature sensor for detecting the temperature of the motor;

[0026] The stator includes stator laminations, insulating end covers provided at both ends of the stator laminations, and coils wound around the stator laminations and the insulating end covers;

[0027] The insulating end cover includes an end cover body and a plurality of winding teeth;

[0028] Wherein, the temperature sensor is placed on any one of the winding teeth;

[0029] The structures of the plurality of winding teeth are the same.

[0030] A motor includes:

[0031] A stator and a rotor;

[0032] The stator includes a stator lamination, insulating end caps disposed at both ends of the stator lamination, and coils wound around the stator lamination and the insulating end caps;

[0033] The insulating end cap includes an end cap body and a plurality of winding teeth;

[0034] It further includes: a temperature sensor;

[0035] The temperature sensor is placed on the first tooth surface of any one of the winding teeth;

[0036] The first tooth surfaces of the plurality of winding teeth are provided as flat surfaces.

[0037] In some embodiments, the first tooth surface is a flat surface.

[0038] The advantages of the present application are as follows:

[0039] The present application provides a power tool. By arranging the temperature sensor on the winding teeth, the heat conduction path between the coil and the temperature sensor is removed, enabling the temperature sensor to be in direct contact with the coil, so that the temperature change of the motor can be sensed in a timely manner to protect the motor in a timely manner; and the influence of the external environment on the temperature sensor is excluded to achieve accurate protection of the motor; in addition, the temperature sensor is directly pre-set on the winding teeth, and then the coil is wound around the winding teeth to wrap and fix the temperature sensor, eliminating the need for an additional temperature sensor fixing structure, reducing the number of components and having a low cost. Description of the Drawings

[0040] Figure 1 is a schematic diagram of the principle of the power tool provided by the embodiment of the present application;

[0041] Figure 2 is a schematic structural diagram of the motor involved in the embodiment of the present application;

[0042] Figure 3 is a schematic structural diagram of the motor involved in the embodiment of the present application after the rotor and the first coil are hidden;

[0043] Figure 4 is a top view of the stator involved in the embodiment of the present application;

[0044] Figure 5 is a cross-sectional view of the motor involved in the embodiment of the present application after the rotor is hidden;

[0045] Figure 6 is a schematic structural diagram of the insulating end cap involved in the embodiment of the present application;

[0046] Figure 7It is a schematic exploded view of the insulating end cap and the stator lamination involved in the embodiments of the present application.

[0047] In the figure:

[0048] 10. Housing; 11. Head shell; 12. Holding part; 20. Motor; 30. Transmission mechanism; 40. Output shaft; 50. Battery pack; 60. Control switch;

[0049] 21. Stator; 22. Rotor; 23. Temperature sensor;

[0050] 211. Stator support ring; 212. Stator teeth; 213. First coil; 214. Second coil; 215. Third coil; 216. Fourth coil; 217. Fifth coil; 218. Sixth coil;

[0051] 221. Stator lamination; 222. Insulating end cap; 223. First insulating end cap; 224. Second insulating end cap; 225. Connecting part; 226. End cap main body; 227. Winding teeth; 228. Tooth main body; 229. Tooth front end;

[0052] 2211. Support core; 2212. Core teeth; 2212a. Core tooth main body; 2112b. Core tooth front end;

[0053] 2231. First end cap main body; 2232. First winding teeth; 2232a. First tooth main body; 2232b. First tooth surface; 2232c. First tooth front end; 2233. Enclosure part; 2233a. Avoidance part;

[0054] 2241. Second end cap main body; 2242. Second winding teeth; 2242a. Second tooth main body; 2242b. Second tooth front end;

[0055] 210. Central axis;

[0056] 220. Rotating shaft. Detailed implementation manners

[0057] Before explaining in detail any embodiment of the present application, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0058] In this application, the terms "comprise", "include", "have" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0059] In this application, the term "and / or" describes an associative relationship between associated objects and indicates that three relationships can exist. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.

[0060] In this application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or can be indirect connection, combination, coupling or mounting. Among them, by way of example, direct connection means that two parts or components are connected together without the need to provide an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0061] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances caused by manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. A numerical value without the use of a relative term should also be disclosed as a particular value with tolerances. In addition, when "substantially" expresses a relative angular positional relationship (such as substantially parallel, substantially perpendicular), it may refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0062] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0063] In this application, the directional terms such as "upper", "lower", "left", "right", "front", and "back" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the directional terms such as the upper side, the lower side, the left side, the right side, the front side, and the back side not only represent the positive direction, but can also be understood as the side direction. For example, the lower side can include directly below, lower left, lower right, lower front, and lower back, etc.

[0064] In this application, the terms "controller", "processor", "central processor", "CPU", and "MCU" can be used interchangeably. When using the units "controller", "processor", "central processor", "CPU", or "MCU" to perform specific functions, unless otherwise specified, these functions can be performed by a single one of the above units or multiple of the above units.

[0065] In this application, the terms "device", "module", or "unit" can be implemented in the form of hardware or software in order to achieve specific functions.

[0066] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or a similar electronic computing device (e.g., controller, processor, etc.).

[0067] In this embodiment, the motor can be applied to a variety of different types of power tools. For example, the power tool can be a riding lawn mower, a drill, a chainsaw, a string trimmer, and a blower. The power tool can also be a handheld power tool, such as a drill, a pruning machine, a sander, etc. Or, the power tool can also be a bench-type tool, such as a table saw, a miter saw, etc. Or, the power tool can also be a walk-behind power tool, such as a walk-behind lawn mower, a walk-behind snow blower. Or, the power tool can also be a riding power tool, such as a riding lawn mower, a riding vehicle, an all-terrain vehicle, etc. Or, the power tool can also be a robotic tool, such as a lawn mowing robot, a snow sweeping robot, etc. In some embodiments, the power tool can be a drill, a light, an electric vehicle, etc. In some embodiments, the power tool can also be a gardening tool, such as a pruning machine, a blower, a lawn mower, a chainsaw, etc. Or, the power tool can also be a decorating tool, such as a screwdriver, a nail gun, a circular saw, a sander, etc. In some embodiments, the power tool can also be a vegetation care tool, such as a string trimmer, a lawn mower, a pruning machine, a chainsaw, etc. Or, the power tool can also be a cleaning tool, such as a blower, a snow blower, a washer, etc. Or, the power tool can also be a drilling tool, such as a drill, a screwdriver, a wrench, a jackhammer, etc. Or, the power tool can also be a sawing tool, such as a reciprocating saw, a jigsaw, a circular saw, etc. Or, the power tool can also be a bench-type tool, such as a table saw, a miter saw, a metal cutting machine, a router, etc. Or, the power tool can also be a grinding tool, such as an angle grinder, a sander, etc. Or, the power tool can also be other tools, such as a fan, etc.

[0068] In one embodiment, taking a handheld power tool as shown in Figure 1 as an example, the power tool includes a housing 10, a motor 20, an output shaft 40, a transmission mechanism 30, and a mounting device. The motor 20 is disposed within the housing 10. The motor 20 includes or is connected to a motor shaft so that the motor 20 outputs power. The transmission mechanism 30 connects the motor shaft and the output shaft 40. The motor 20 drives the motor shaft to rotate, and the motor shaft drives the output shaft 40 to rotate about a first axis through the transmission mechanism 30. The mounting device is used to mount a working accessory to the output shaft 40 so that the output shaft 40 can drive the working accessory to rotate.

[0069] The housing 10 includes a head housing 11 and a grip portion 12. The head housing 11 is connected to the grip portion 12 and is preferably disposed vertically or approximately vertically. The motor 20 and the transmission mechanism 30 are disposed within the head housing 11. A portion of the output shaft 40 is disposed within the head housing 11. The motor shaft and the output shaft 40 are coaxially disposed, and the transmission mechanism 30 connects the motor shaft and the output shaft 40. When the motor shaft rotates, the output shaft 40 is driven to rotate through the transmission mechanism 30, and the output shaft 40 then drives the working accessory to rotate.

[0070] The power tool further includes a power supply for supplying electric energy to the power tool. In this embodiment, the power supply is a battery pack 50, and the battery pack 50 cooperates with a corresponding power circuit to supply power to the power tool. In some embodiments, a battery pack engaging portion is formed on the housing 10, and the battery pack engaging portion is used for mounting the battery pack 50, and the battery pack 50 is detachably connected to the battery pack engaging portion.

[0071] A control switch 60 for operation is connected to the grip portion 12, and the operating state of the power tool can be controlled through the control switch 60.

[0072] Next, in conjunction with Figures 2 to 7 the structure of the motor 20 will be introduced in detail.

[0073] The motor 20 includes a stator 21 and a rotor 22.

[0074] As Figure 2 and Figure 3 shown, the stator 21 includes: a stator support ring 211 and six stator teeth 212. The stator 21 further includes: a first-phase coil, a second-phase coil, and a third-phase coil. More specifically, the stator 21 includes: a first coil 213, a second coil 214, a third coil 215, a fourth coil 216, a fifth coil 217, and a sixth coil 218. The first-phase coil includes any two of the first coil 213 to the sixth coil 218. The two coils in the first-phase coil are connected in series with each other. The second-phase coil includes any two of the aforementioned first coil 213 to the sixth coil 218 that are different from the first-phase coil. The two coils in the second-phase coil are connected in series with each other. The third-phase coil includes two of the aforementioned first coil 213 to the sixth coil 218 that are different from the first-phase coil and the second-phase coil. The two coils in the third-phase coil are connected in series with each other.

[0075] The stator support ring 211 has an annular shape (for example, a cylindrical shape with open ends at both ends). The six stator teeth 212 are arranged at equal intervals (for example, 60-degree intervals) along the circumferential direction of the inner peripheral surface of the stator support ring 211. Each stator tooth 212 protrudes from the inner peripheral surface of the stator support ring 211 toward the central axis 210 of the stator support ring 211 (that is, along the radial direction of the stator support ring 211). It should be noted that the central axis 210 is coaxial with the rotation axis 220 of the rotor 22, that is, coaxial with the rotation shaft 220.

[0076] Each stator tooth 212 includes: a stator tooth main body, and a front end portion of the stator tooth. The stator tooth main body protrudes toward the central axis 210 of the stator support ring 211 on the inner circumferential surface of the stator support ring 211. The front end portion of the stator tooth is provided at the end portion of the stator tooth main body that protrudes toward the central axis 210. The area of the cross section of the front end portion of the stator tooth perpendicular to the above-mentioned radial direction is larger than the area of the cross section of the stator tooth main body perpendicular to the above-mentioned radial direction. That is, the front end portion of the stator tooth is provided in a flange shape with respect to the stator tooth main body.

[0077] The first coil 213 to the sixth coil 218 are respectively provided on any one stator tooth 212. More specifically, the first coil 213 to the sixth coil 218 are respectively wound around the stator tooth main body in the corresponding stator tooth 212.

[0078] In the present embodiment, for example, the first-phase coil, the second-phase coil, and the third-phase coil are connected in a triangle to each other. That is, the first end of the first-phase coil is connected to the first end of the second-phase coil, and is connected to the motor drive circuit in the controller. For example, a U-phase drive current is supplied from the motor drive circuit to the first end of the first-phase coil. The second end of the first-phase coil is connected to the first end of the third-phase coil, and is connected to the motor drive circuit. For example, a V-phase drive current is supplied from the motor drive circuit to the second end of the first-phase coil. The second end of the second-phase coil is connected to the second end of the third-phase coil, and is connected to the motor drive circuit. For example, a W-phase drive current is supplied from the motor drive circuit to the second end of the second-phase coil.

[0079] In the present embodiment, for example, the first coil 213 and the fourth coil 216 are connected in series with each other. The first-phase coil includes the first coil 213 and the fourth coil 216. In addition, for example, the second coil 214 and the fifth coil 217 are connected in series with each other. The second-phase coil includes the second coil 214 and the fifth coil 217. In addition, for example, the third coil 215 and the sixth coil 218 are connected in series with each other. The third-phase coil includes the third coil 215 and the sixth coil 218.

[0080] The first-phase coil, the second-phase coil, and the third-phase coil may also be connected to each other by a connection method different from the triangle connection (for example, star connection).

[0081] The rotor 22 is a so-called permanent magnet type rotor 22 with a permanent magnet built therein. The rotor 22 rotates in response to the supply of power from the controller to the stator 21. It should be noted that supplying power to the stator 21 means supplying at least one of the aforementioned U-phase drive current, V-phase drive current, and W-phase drive current to the stator 21.

[0082] The rotor 22 is provided with a rotating shaft 220. The rotating shaft 220 rotates integrally with the rotor 22. The rotating shaft 220 is connected to the drive mechanism. The rotational driving force of the rotor 22 is transmitted to the drive mechanism via the rotating shaft 220. The rotating shaft 220 is the above-mentioned motor shaft.

[0083] The structures of the six stator teeth 212 are the same. The temperature sensor 23 is provided on one of the six stator teeth 212. In the present embodiment, for example, the temperature sensor 23 is provided on the stator tooth 212 around which the first coil 213 is wound.

[0084] As Figure 4 and Figure 5 shown, the temperature sensor 23 is provided on the stator tooth body of the stator tooth 212. When the motor 20 is observed from the front, that is, when the motor 20 is observed in the direction along the central axis 210 from the side where the drive mechanism is provided, the whole of the temperature sensor 23 completely overlaps with the first coil 213. That is, the whole of the temperature sensor 23 is covered by the first coil 213.

[0085] As Figure 6 and Figure 7 shown, the stator 21 of the present embodiment includes: a stator lamination 221 and an insulating end cap 222. The insulating end cap 222 includes a first insulating end cap 223 provided at the first end of the stator lamination 221 and a second insulating end cap 224 provided at the second end of the stator lamination 221. The stator support ring 211 and the six stator teeth 212 are formed by sequentially combining the first insulating end cap 223, the stator lamination 221, and the second insulating end cap 224.

[0086] The stator lamination 221 includes a magnetic body. The stator lamination 221 has: a support core 2211 and six core teeth 2212. The support core 2211 is a part of the stator support ring 211. The core teeth 2212 are a part of the stator teeth 212. The support core 2211 has an annular shape (for example, a cylindrical shape with open ends at both ends). The six core teeth 2212 are provided on the inner peripheral surface of the support core 2211 at equal intervals (for example, 60-degree intervals) along the circumferential direction of the support core 2211. Each core tooth 2212 protrudes from the inner peripheral surface of the support core 2211 toward the central axis 210 of the support core 2211 (that is, the aforementioned central axis 210). Each core tooth 2212 has: a core tooth body 2212a and a core tooth front end portion 2212b. The core tooth body 2212a is a part of the stator tooth body. The core tooth front end portion 2212b is a part of the stator tooth front end portion.

[0087] The first insulating end cover 223 includes: a first end cover body 2231 and six first winding teeth 2232. The first end cover body 2231 is a part of the stator support ring 211. The first winding teeth 2232 are a part of the stator teeth 212. The first end cover body 2231 has an annular shape (for example, a cylindrical shape with open ends at both ends). The six first winding teeth 2232 are arranged at equal intervals (for example, at 60-degree intervals) along the circumferential direction of the inner peripheral surface of the first end cover body 2231. Each first winding tooth 2232 protrudes from the inner peripheral surface of the first end cover body 2231 toward the central axis 210 of the first end cover body 2231 (that is, the aforementioned central axis 210). Each first winding tooth 2232 includes: a first tooth body 2232a and a first tooth tip 2232c. The first tooth body 2232a is wound with any one of the corresponding coils among the first coil 213 to the sixth coil 218. The first tooth tip 2232c is a part of the stator tooth tip.

[0088] The second insulating end cover 224 includes: a second end cover body 2241 and six second winding teeth 2242. The second end cover body 2241 is a part of the stator support ring 211. The second winding teeth 2242 are a part of the stator teeth 212. The second end cover body 2241 has an annular shape (for example, a circular ring shape). The six second winding teeth 2242 are arranged at equal intervals (for example, at 60-degree intervals) along the circumferential direction of the inner peripheral surface of the second end cover body 2241. Each second winding tooth 2242 is arranged on the inner peripheral surface of the second end cover body 2241 toward the central axis 210 of the second end cover body 2241 (that is, the aforementioned central axis 210). Each second winding tooth 2242 includes: a second tooth body 2242a and a second tooth tip 2242b. The second tooth body 2242a is a part of the stator tooth body. The second tooth tip 2242b is a part of the stator tooth tip.

[0089] In the stator 21, one stator tooth 212 is composed of a combination of one core tooth 2212, one first winding tooth 2232 corresponding to the core tooth 2212, and one second winding tooth 2242 corresponding to the core tooth 2212.

[0090] In this embodiment, the first insulating end cover 223 and the second insulating end cover 224 are connected as a whole through the connecting portion 225.

[0091] In this embodiment, the temperature sensor 23 is disposed on one of the six first winding teeth 2232. In other embodiments, the temperature sensor 23 may also be disposed on one of the six second winding teeth 2242. Specifically, the temperature sensor 23 is placed on the first tooth surface 2232b, and the first tooth surface 2232b is a plane substantially perpendicular to the rotating shaft 220 of the motor 20. For example, one surface of the first tooth body 2232a or the second tooth body 2242a that is substantially perpendicular to the rotating shaft 220 of the motor 20 is set as the above-mentioned first tooth surface 2232b.

[0092] In some embodiments, the six first tooth surfaces 2232b are on the same horizontal plane. In some embodiments, the six first tooth surfaces 2232b are on different horizontal planes, and the multiple different horizontal planes are substantially parallel to each other. In some embodiments, the first tooth surface 2232b is a plane substantially perpendicular to the rotating shaft 220. In some embodiments, the first tooth surface 2232b may also be a plane that is not perpendicular to the rotating shaft 220.

[0093] In some embodiments, a fixing coating is applied between the temperature sensor 23 and the first tooth surface 2232b to fix the temperature sensor 23 on the first tooth surface 2232b, making the temperature sensor more firmly fixed. For example, the fixing coating may be fixing glue. In other embodiments, the temperature sensor 23 may be fixed on the first tooth surface 2232b by tape.

[0094] In some embodiments, the temperature sensor 23 is in direct contact with the coil wound around the winding tooth 227, and the coil forms a wrapping and fixing effect on the temperature sensor 23, eliminating the need for an additional temperature sensor fixing structure.

[0095] Furthermore, the insulating end cap 222 further includes: a surrounding portion 2233. The surrounding portion 2233 is disposed on the outer periphery side of the winding tooth 227, that is, the surrounding portion 2233 is disposed opposite to the front end portion of the stator tooth. An avoidance portion 2233a is provided on the surrounding portion 2233 corresponding to at least the winding tooth 227 where the temperature sensor 23 is disposed to avoid the lead wire of the temperature sensor 23. In some embodiments, the avoidance portion 2233a is set as a hole-like structure on the surrounding portion 2233. In one embodiment, the avoidance portion 2233a may also be a slot or other structure capable of avoiding the lead wire.

[0096] The above shows and describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present application.

Claims

1. An electric tool comprising: A motor (20) comprising a stator (21) and a rotor (22); A transmission mechanism (30) configured to transmit a driving force generated by the rotation of the rotor (22) to drive the working component to work; A temperature sensor (23) for detecting the temperature of the motor (20); The stator (21) comprises a stator lamination (221), insulating end covers (222) arranged at both ends of the stator lamination (221), and a coil wound on the stator lamination (221) and the insulating end covers (222); The insulating end cover (222) comprises an end cover body (226) and a plurality of winding teeth (227); Characterized in that the temperature sensor (23) is placed on the first tooth surface (2232b) of any one of the winding teeth (227); The first tooth surface (2232b) is a plane substantially perpendicular to the rotation axis (220) of the rotor (22).

2. The electric tool according to claim 1, characterized in that: The winding tooth (227) includes a tooth body (228) and a tooth front end portion (229), and the tooth front end portion (229) is flange-shaped relative to the tooth body (228); wherein a surface of the tooth body (228) substantially perpendicular to the rotating shaft (220) is arranged as the first tooth surface (2232b).

3. The electric tool according to claim 1, characterized in that: The insulating end cover (222) further comprises a blocking portion (2233), and a avoiding portion (2233a) is provided on the blocking portion (2233) to avoid the lead-out wires of the temperature sensor (23).

4. The electric tool according to claim 3, characterized in that: The avoidance portion (2233a) is configured as a hole-shaped structure on the enclosure portion (2233).

5. The electric tool according to claim 1, characterized in that: A fixing coating is coated between the temperature sensor (23) and the first tooth surface (2232b) so as to fix the temperature sensor (23) on the first tooth surface (2232b).

6. The electric tool according to claim 5, characterized in that: The fixing coating comprises a fixing glue.

7. The electric tool according to claim 1, characterized in that: The temperature sensor (23) is in direct contact with the coil wound on the winding teeth (227).

8. An electric tool comprising: A motor (20) comprising a stator (21) and a rotor (22); A transmission mechanism (30) configured to transmit a driving force generated by the rotation of the rotor (22) to drive the working component to work; A temperature sensor (23) for detecting the temperature of the motor (20); The stator (21) comprises a stator lamination (221), insulating end covers (222) arranged at both ends of the stator lamination (221), and a coil wound on the stator lamination (221) and the insulating end covers (222); The insulating end cover (222) comprises an end cover body (226) and a plurality of winding teeth (227); Characterized in that the temperature sensor (23) is placed on any one of the winding teeth (227); The structures of the plurality of winding teeth (227) are the same.

9. A motor, comprising: A stator (21) and a rotor (22); The stator (21) comprises a stator lamination (221), insulating end covers (222) arranged at both ends of the stator lamination (221), and a coil wound on the stator lamination (221) and the insulating end covers (222); The insulating end cover (222) comprises an end cover body (226) and a plurality of winding teeth (227); Also included: a temperature sensor (23); Characterized in that the temperature sensor (23) is placed on the first tooth surface (2232b) of any one of the winding teeth (227); The first tooth surfaces (2232b) of the plurality of winding teeth (227) are configured as planes.

10. The motor according to claim 9, characterized in that The first tooth surface (2232b) is a plane.

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