Stator end plate, motor and electric tool

Abstract

The utility model relates to the technical field of motors, aims to solve the technical problems of low fixing reliability and low fixing efficiency of stator wire harnesses of some known motors, and provides a stator end plate, a motor and an electric tool. The stator end plate comprises a main body structure and a winding structure. The main body structure is provided with an end face. The winding structure is convexly arranged on the end face along the axial direction of the stator end plate, the winding structure comprises a wire inlet part and a wire outlet part, the wire inlet part convexly extends from the end face along the axial direction, and the wire outlet part convexly extends outwards from the end part of the wire inlet part; the wire outlet part is provided with a wire clamping channel for a cable to penetrate through, the wire clamping channel penetrates through the two axial ends of the wire outlet part, and the wire clamping channel fixes the cable to the wire outlet part. The cable clamping device has the beneficial effect that the clamping reliability and clamping efficiency of the cable are improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more specifically, to stator end plates, motors, and power tools. Background Technology

[0002] The stator wiring harnesses of some known motors are usually fixed by means of cable ties, wire binding, glue, heat shrink tubing, etc., which require additional materials and corresponding assembly processes, resulting in low reliability and low efficiency of cable fixing. Utility Model Content

[0003] This application provides a stator end plate, a motor, and power tools to solve the technical problems of low fixing reliability and low fixing efficiency of stator wiring harnesses in some known motors.

[0004] This application provides a stator end plate, including a main structure and a winding structure. The main structure has an end face. The winding structure protrudes from the end face along the axial direction of the stator end plate. The winding structure includes an inlet portion and an outlet portion. The inlet portion protrudes axially from the end face, and the outlet portion protrudes outward from the end of the inlet portion. The outlet portion has a cable-holding channel for a cable to pass through. The cable-holding channel passes through both axial ends of the outlet portion. The cable enters the radially inner side of the outlet portion from the radially outer side of the inlet portion and is held in the cable-holding channel.

[0005] According to the stator end plate of this application, after assembly, the internal cables of the motor can be guided into the cable clamping channel by the cable inlet and fixed by the cable clamping channel. This improves the reliability of cable freedom constraint, eliminates the need for additional materials such as cable ties, wire binding, adhesive, or heat shrink tubing for cable fixing, and reduces the processes and space occupied by these materials, thereby improving motor assembly efficiency and further reducing the motor's size.

[0006] In one possible implementation:

[0007] The cable outlet has a radially open opening along the stator end plate, the opening communicating with the cable clamping channel; the winding structure has a first limiting portion protruding from the inner surface of the cable outlet, the first limiting portion clamping the cable in the cable clamping channel.

[0008] In one possible implementation:

[0009] The first limiting part is disposed on the radially inner side near the stator end plate.

[0010] In one possible implementation:

[0011] There are two first limiting parts. The two first limiting parts are respectively connected to the two sides of the outgoing part along the circumferential edge of the stator end plate. A card interface is defined between the two first limiting parts. The cable is held in the card channel through the card interface.

[0012] In one possible implementation:

[0013] One of the first limiting portions has a first surface area, and the other of the first limiting portions has a second surface area. The distance between the first surface area and the second surface area gradually decreases in the direction close to the card interface, so as to guide the cable through the card interface and hold it in the card cable channel.

[0014] In one possible implementation:

[0015] The cable clamping channel has an arc surface and a connecting surface. The arc surface is concave along the radial direction of the stator end plate, and the size of the arc surface is adapted to the size of the cable. Each end of the arc surface has a connecting surface. The first limiting part has a limiting surface. One side of the connecting surface is connected to the arc surface, and the other side of the connecting surface is connected to the limiting surface.

[0016] In one possible implementation:

[0017] The cable outlet is spaced apart from the end face, and the bottom surface of the cable outlet and the end face define an inlet channel. The cable clamping channel is located on the side of the inlet section and communicates with the inlet channel.

[0018] In one possible implementation:

[0019] The cable entry channel includes a first section and a second section. The first section is connected to the cable clamping channel through the second section. The first section is used to guide the cable to extend along a first direction, the second section is used to guide the cable to extend along a second direction, and the cable clamping channel is used to guide the cable to extend along a third direction. The first direction intersects with the second direction and the third direction.

[0020] This application provides an electric motor, including a stator core, the aforementioned stator end plate, and a cable. The stator end plate is mounted to one end of the stator core. One end of the cable is connected to the stator core, and the cable passes through the winding channel of the stator end plate.

[0021] This application also provides a power tool, including a housing and the aforementioned motor. The motor is disposed in the housing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a power tool according to an embodiment of this application.

[0024] Figure 2 This is a cross-sectional view of a motor according to an embodiment of this application.

[0025] Figure 3 This is a partial structural diagram of a motor according to an embodiment of this application.

[0026] Figure 4 This is a three-dimensional structural diagram of a stator end plate according to an embodiment of this application.

[0027] Figure 5 This is a top view of the stator end plate according to an embodiment of this application.

[0028] Figure 6 for Figure 3 A magnified schematic diagram of the structure at point II.

[0029] Figure 7 for Figure 4 A magnified schematic diagram of the structure at point III.

[0030] Figure 8 for Figure 4 A magnified schematic diagram of the structure at point XI.

[0031] Figure 9 for Figure 5 A magnified schematic diagram of the structure at point V in the middle.

[0032] Explanation of key component symbols:

[0033] Stator end plate 100

[0034] Main structure 10

[0035] Wire winding structure 20

[0036] Incoming Line Section 21

[0037] Outbound Section 22

[0038] First limiting part 23

[0039] Second limiting part 24

[0040] Motor 200

[0041] Stator 201

[0042] Rotor 202

[0043] Output shaft 203

[0044] Stator core 204

[0045] Cable 205

[0046] First line segment 2051

[0047] Second segment 2052

[0048] Third segment 2053

[0049] Connecting segment 2054

[0050] Power tools 300

[0051] Casing 301

[0052] First direction X

[0053] Second direction Y

[0054] Third direction Z

[0055] Zhou Xiang W

[0056] End face P1

[0057] Bottom surface P2

[0058] First side view P3

[0059] Second side P4

[0060] First section, page 51

[0061] Second section, page 52

[0062] Curved surface P6

[0063] Connection surface P7

[0064] Limiting surface P8

[0065] Opening K1

[0066] Card Interface K2

[0067] Card Channel Q1

[0068] Incoming channel Q2

[0069] First hole section Q21

[0070] Second hole section Q22

[0071] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0072] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0073] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0075] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0076] See Figure 1 This embodiment provides a power tool 300, including a housing 301 and a motor 200. The motor 200 is disposed within the housing 301. The motor 200 is used to drive the load to rotate. The motor 200 can be used to drive the actuators of the power tool 300 to move as needed, to achieve various functions such as locking, releasing, and cutting. The motor 200 of this embodiment can also be applied to other equipment such as cleaning equipment and automation equipment.

[0077] See Figure 2 and Figure 3The motor 200 includes a stator 201, a rotor 202, an output shaft 203, a stator core 204, a cable 205, and a stator end plate 100. The rotor 202 is rotatably fitted to the stator 201. The rotor 202 can be located inside or outside the stator 201. The output shaft 203 is connected to the rotor 202. The output shaft 203 can be directly connected to the rotor 202 or indirectly connected to the rotor 202 through a housing. The output shaft 203 is used to connect an actuator. The stator end plate 100 is mounted to one end of the stator core 204. One end of the cable 205 is connected to the stator core 204, and the other end of the cable 205 passes through the cable clamping channel Q1 of the stator end plate 100.

[0078] In this embodiment, three intersecting directions are defined: a first direction X, a second direction Y, and a third direction Z. The axial direction of the stator end plate 100 is parallel to the third direction Z, and the radial direction of the stator end plate 100 is parallel to the second direction Y. The first direction X can be the circumferential direction W of the stator end plate 100, or it can be a direction perpendicular to the radial direction of the stator end plate 100 (i.e., the second direction Y).

[0079] In other implementations, the first direction X, the second direction Y, and the third direction Z can be three directions in a Cartesian coordinate system.

[0080] See Figure 3 and Figure 4 The stator end plate 100 includes a main structure 10 and a winding structure 20. The main structure 10 has an end face P1. The end face P1 is perpendicular to the axial direction (i.e., the third direction Z) of the motor 200. The winding structure 20 protrudes from the end face P1 along the axial direction of the stator end plate 100. The winding structure 20 includes an inlet section 21 and an outlet section 22. The inlet section 21 protrudes axially from the end face P1, and the outlet section 22 protrudes outward from the end of the inlet section 21. The outlet section 22 has a cable clamping channel Q1 for the cable 205 to pass through. The cable clamping channel Q1 passes through both ends of the outlet section 22 axially (i.e., both ends of the outlet section 22 along the third direction Z). The cable clamping channel Q1 fixes the cable 205 to the outlet section 22.

[0081] According to the stator end plate 100 of this application, after assembly, the cable 205 inside the motor 200 can be guided by the inlet 21 into the cable clamping channel Q1 and fixed by the cable clamping channel Q1. This improves the reliability of the constraint on the degree of freedom of the cable 205, eliminating the need for additional materials such as cable ties, binding wires, adhesive, or heat shrink tubing for fixing the cable 205. It also reduces the processes associated with these materials and the space they occupy, thereby improving the assembly efficiency of the motor 200 and further reducing its size.

[0082] In some implementations, see Figure 4 and Figure 5The main structure 10 can be constructed as a ring-shaped component, such as a circular ring, to facilitate installation in the housing (not shown) of the motor 200.

[0083] Optionally, see Figure 4 and Figure 5 The number of winding structures 20 is multiple. These multiple winding structures 20 are arranged sequentially at intervals along the circumference W of the main structure 10. More specifically, the multiple winding structures 20 can be evenly distributed at intervals along the circumference W of the main structure 10. In this embodiment, the number of winding structures 20 is four. In other embodiments, the number of winding structures 20 can be two, three, five, or more.

[0084] In some embodiments, see Figures 6 to 8 The cable outlet 22 and the end face P1 are spaced apart along the third direction Z. The bottom surface P2 of the cable outlet 22 (see...) Figure 8 The bottom surface P2 defines an inlet channel Q2 between the bottom surface P2 and the end surface P1. Optionally, the bottom surface P2 is parallel to the end surface P1 to facilitate clamping the cable 205. In other embodiments, the bottom surface P2 may also intersect with the end surface P1. The cable clamping channel Q1 is located on the side of the inlet section 21 and communicates with the inlet channel Q2. The inlet channel Q2 facilitates the insertion of the cable 205 of the stator core 204 from the inlet channel Q2, followed by bending along the third direction Z to clamp into the cable clamping channel Q1, and then extending along the third direction Z. In this way, the inlet channel Q2 can guide the cable 205 to bend in different directions, thereby further improving the fixing reliability of the cable 205.

[0085] In some embodiments, see Figures 6 to 8 The cable entry channel Q2 includes a first segment Q21 and a second segment Q22. The first segment Q21 connects to the cable clamping channel Q1 through the second segment Q22. The first segment Q21 guides the cable 205 to extend along a first direction X. The second segment Q22 guides the cable 205 to extend along the first direction X. The cable entry channel Q2 is generally L-shaped. The cable clamping channel Q1 guides the cable 205 to extend along a third direction Z. Thus, the cable entry channel Q2 and the cable clamping channel Q1 cooperate to achieve the winding of the cable 205 in three different directions on the winding structure 20, and perform two turns, thereby improving the clamping stability of the cable 205 on the winding structure 20.

[0086] Among them, Figure 6 In the embodiment shown, the first direction X is the circumferential direction W of the stator end plate 100. Figure 7 and Figure 8 In the illustrated embodiment, the first direction X is tangent to the circumferential direction W of the stator end plate 100. Therefore, the specific orientation of the first direction X can be adjusted according to actual needs, as long as it is perpendicular or oblique to the second direction Y and the third direction Z.

[0087] Specifically, see Figure 6 The cable 205 includes a first segment 2051, a second segment 2052, a third segment 2053, and a connecting segment 2054 connected sequentially along its length. The first segment 2051 extends from the stator core 204 and is inserted into a first hole Q21, extending along a first direction X. The second segment 2052 is bent and connected to the first segment 2051, and is inserted into a second hole Q22, extending along a second direction Y. The third segment 2053 is bent and connected to the end of the second segment 2052 opposite to the first segment 2051, and is held within a cable-holding channel Q1. The connecting segment 2054 connects to the end of the third segment 2053 located outside the cable-holding channel Q1.

[0088] In other embodiments, the first hole segment Q21 may extend along the second direction Y, and the second hole segment Q22 may extend along the first direction X. Furthermore, the inlet channel Q2 may be constructed in various shapes such as S-shape or triangle.

[0089] Specifically, see Figures 7 to 9 The bottom surface P2 of the cable exit portion 22 is located on the side of the cable exit portion 22 closer to the end surface P1 along the third direction Z. The bottom surface P2 and the end surface P1 are spaced apart along the third direction Z. The cable inlet portion 21 has a first side surface P3 disposed along the second direction Y toward the outside of the stator end plate 100. The cable inlet portion 21 has a second side surface P4 disposed along the first direction X toward the outside of the stator end plate 100. The second side surface P4 is bent and connected to the first side surface P3. A portion of the cable exit portion 22 extends outward along the second direction Y. Another portion of the cable exit portion 22 extends away from the cable inlet portion 21 along the first direction X. Thus, the first side surface P3, the end surface P1, and the bottom surface P2 form a first hole segment Q21, and the second side surface P4, the end surface P1, and the bottom surface P2 form a second hole segment Q22.

[0090] Thus, the incoming line channel Q2 is formed by bending from the second direction Y towards the third direction Z. When the stator end plate 100 adopts a mold forming process, it is convenient to pull the core from the radial outside of the mold, thereby improving the forming convenience, increasing the forming yield, and reducing the processing cost.

[0091] Optionally, see Figure 8 The lead-out portion 22 extends radially outward along the second direction Y toward the stator end plate 100 and extends in the first direction X away from the lead-in portion 21, so that the first hole section Q21 is open radially outward along the stator end plate 100, and the second hole section Q22 is open in the first direction X away from the lead-in portion 21. This facilitates the cable 205 being inserted into the first hole section Q21 from the winding structure 20 radially outward along the stator end plate 100, and then turning and bending from the opening of the second hole section Q22, thereby improving the ease of winding the cable 205.

[0092] Optionally, see Figure 7 The stator end plate 100 also includes a second limiting part 24. The second limiting part 24 protrudes from the end face P1. Along the third direction Z, the second limiting part 24 is correspondingly provided with the end of the cable outlet 22 opposite to the end of the cable inlet 21 along the first direction X. In this way, the second limiting part 24 can limit the portion of the cable 205 located in the second hole section Q22 in the first direction X, thereby further improving the snap-fit ​​reliability of the cable 205.

[0093] Optionally, there may be multiple second limiting parts 24 and multiple winding structures 20, with each winding structure 20 corresponding to one second limiting part 24.

[0094] Specifically, the second limiting part 24 has a rib structure that extends along the second direction Y.

[0095] See Figure 7 The lead-out section 22 has an opening K1 that is radially open along the stator end plate 100. The winding structure 20 has a first limiting section 23 that protrudes from the inner surface of the lead-out section 22, and the first limiting section 23 holds the cable 205 in the cable holding channel Q1.

[0096] In this way, the cable 205 can be inserted into the cable clamping channel Q1 through the opening K1 and limited by the first limiting part 23, thereby improving the cable clamping efficiency and ensuring the cable clamping reliability.

[0097] Specifically, the spacing of the openings K1 is smaller than the diameter of the cable 205. By deforming the outer sheath structure of the cable 205, the cable 205 can be inserted into the cable-clamping channel Q1 through the opening K1.

[0098] In other embodiments, the cable clamping channel Q1 can be configured as a through hole extending through the cable outlet portion 22 in a third direction Z, and the through hole is located inside the outer peripheral surface of the cable outlet portion 22. During the cable clamping process, the cable 205 can be inserted into the through hole from the end near the end face P1, and then extended from the end away from the end face P1, thereby achieving cable clamping.

[0099] In some embodiments, see Figure 7 The opening K1 is located on the side of the outgoing part 22 that is radially (i.e., in the second direction Y) inward along the stator end plate 100, and the first limiting part 23 is provided close to the radially (i.e., in the second direction Y) inner side of the stator end plate 100.

[0100] Specifically, the projection of the cable-clamping channel Q1 along the third direction Z onto the end face P1 is spaced apart from the projection of the first hole segment Q21 along the third direction Z onto the end face P1. This ensures that each part of the cable 205 in the first direction X, the second direction Y, and the third direction Z has a certain length, thereby ensuring the reliability of the cable 205's engagement.

[0101] In other embodiments, the opening K1 may also be located on the outer side of the stator end plate 100 along the radial direction (i.e., the second direction Y) of the cable outlet 22, and the first limiting part 23 may be located close to the outer side of the stator end plate 100. Therefore, the opening direction of the opening K1 can be determined according to actual needs.

[0102] In some embodiments, see Figure 7 There are two first limiting parts 23. The two first limiting parts 23 are respectively connected to the two sides of the output part 22 along the radial (i.e. the second direction Y) edge of the stator end plate 100. The card interface K2 is defined between the two first limiting parts 23. The cable 205 is held in the card channel Q1 through the card interface K2.

[0103] In this way, the two first limiting parts 23 can uniformly limit the cable 205, thereby reducing the possibility of the cable 205 coming off.

[0104] In some embodiments, see Figure 7 One first limiting part 23 has a first surface area P51, and the other first limiting part 23 has a second surface area P52. The distance between the first surface area P51 and the second surface area P52 gradually decreases in the direction close to the card interface K2, so as to guide the cable 205 through the card interface K2 and hold it in the card cable channel Q1.

[0105] This facilitates the holding of the cable 205 and improves the holding efficiency of the cable 205. In addition, the first surface area P51 and the second surface area P52 also cause the winding structure 20 to be recessed outward along the radial side of the stator end plate 100, forming a certain clearance area for the cable 205 to be inserted.

[0106] In some embodiments, see Figure 7 The cable channel Q1 has an arc surface P6 and a connecting surface P7. The arc surface P6 is concave radially along the stator end plate 100, and the size of the arc surface P6 is adapted to the size of the cable 205. Each end of the arc surface P6 has a connecting surface P7, and the first limiting part 23 has a limiting surface P8. One side of the connecting surface P7 is connected to the arc surface P6, and the other side of the connecting surface P7 is connected to the limiting surface P8.

[0107] Optionally, the limiting surface P8 is perpendicular to the connecting surface P7.

[0108] Specifically, the curved surface P6 can be constructed as a semi-circular curved surface or a minor curved surface. In other embodiments, the cross-section of the wire-clamping channel Q1 can also be directly constructed as a major curved surface.

[0109] Optionally, see Figure 9 The two first limiting parts 23 are symmetrically arranged about the symmetry plane M. The symmetry plane M is perpendicular to the first direction X. Optionally, the wire clamping channel Q1 has a structure symmetrical about the symmetry plane M.

[0110] In other embodiments, the number of first limiting portions 23 may also be set to one, which is connected to one side edge of the outgoing portion 22 along the radial direction of the stator end plate 100.

[0111] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A stator end plate, characterized in that, include: The main structure has an end face; A winding structure is provided, which protrudes axially from the end face of the stator end plate. The winding structure includes an inlet section and an outlet section. The inlet section protrudes axially from the end face, and the outlet section protrudes axially away from the end face from the end of the inlet section. The outlet section has a cable-holding channel for the cable to pass through. The cable-holding channel passes through both ends of the outlet section axially. The cable enters the radially inner side of the outlet section from the radially outer side of the inlet section and is held in the cable-holding channel.

2. The stator end plate according to claim 1, characterized in that: The lead-out section has an opening that opens radially along the stator end plate, and the opening communicates with the wire clamping channel; The winding structure has a first limiting part protruding from the lead-out portion, which holds the cable in the cable-holding channel.

3. The stator end plate according to claim 2, characterized in that: The first limiting part is disposed on the radially inner side near the stator end plate.

4. The stator end plate according to claim 2, characterized in that: There are two first limiting parts. The two first limiting parts are respectively connected to the two sides of the outgoing part along the circumferential edge of the stator end plate. A card interface is defined between the two first limiting parts. The cable passes through the card interface and is held in the card channel.

5. The stator end plate according to claim 4, characterized in that: One of the first limiting portions has a first surface area, and the other of the first limiting portions has a second surface area. The radial thickness of the first surface area and the second surface area gradually decreases along the direction close to the card interface to guide the cable through the card interface and hold it in the card cable channel.

6. The stator end plate according to claim 2, characterized in that: The cable clamping channel has an arc surface and a connecting surface. The arc surface is concave along the radial direction of the stator end plate, and the size of the arc surface is adapted to the size of the cable. Each end of the arc surface has a connecting surface. The first limiting part has a limiting surface. One side of the connecting surface is connected to the arc surface, and the other side of the connecting surface is connected to the limiting surface.

7. The stator end plate according to claim 1, characterized in that: The cable outlet is spaced apart from the end face, and the bottom surface of the cable outlet and the end face define an inlet channel. The cable clamping channel and the cable clamping channel are located on both sides of the inlet, and the cable clamping channel is connected to the inlet channel.

8. The stator end plate according to claim 7, characterized in that: The incoming cable channel includes a first section and a second section. The first section is connected to the cable clamping channel through the second section. The first section guides the cable to extend in a first direction, the second section guides the cable to extend in a second direction, and the cable clamping channel guides the cable to extend in a third direction. Among them, the first direction intersects with the second direction and the third direction.

9. An electric motor, characterized in that, include: Stator core; The stator end plate as described in any one of claims 1 to 8 is mounted to one end of the stator core; A cable, one end of which is connected to the stator core, and the cable passes through the wire clamping channel of the stator end plate.

10. A power tool, characterized in that, include: chassis; The motor as described in claim 9 is disposed in the housing.

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