stator
By setting a wire clamping plate and a protrusion design on the stator end plate of the brushless motor, the problem of the lead wire not being securely fixed at the stator end is solved, and the stable fixing and reliable positioning of the lead wire are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU DONGCHENG TOOLS TECH CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-07-03
AI Technical Summary
The existing wire clamping structure cannot effectively fix the lead wire at the stator end of the brushless motor, causing the lead wire to deviate and affecting the positioning effect.
The lead wire is fixed to the radial outer side of the stator end plate using a wire clamping plate, and the upper axial end of the wire clamping plate extends beyond the upper axial end of the stator end plate. The lead wire is fixed by the fixing part and the wire clamping part of the wire clamping plate. Combined with the protrusion design of the stator end plate, the stable fixation of the lead wire is ensured.
It effectively prevents the lead wires from coming loose, ensures that the lead wires are reliably fixed on the stator end plate, and improves the positioning effect of the wire clamping structure.
Smart Images
Figure CN224459439U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model relates to the field of motor technology, and in particular to a stator. [Background Technology]
[0002] Brushless motors mainly consist of a stator, a rotor, and an electronic commutator (brushless motor controller). The electronic commutator replaces the original brushes for commutation, and has the advantages of high efficiency, long life and easy control. It is increasingly widely used in many fields such as power tools and portable electronic devices.
[0003] The stator of a brushless motor consists of windings wound on the stator core and stator end plates. These windings need to be electrically connected to an external power source via lead wires. To reliably connect the lead wires from the windings to the outside of the stator, a wire-clamping structure is typically installed on the outer periphery of the stator end plate. The lead wire is clamped in this structure after exiting the winding. This ensures reliable positioning of the lead wire at its exit point from the stator end plate. However, existing wire-clamping structures do not connect to the lead wire at the axial end, causing this portion of the lead wire to deviate axially or radially, affecting the positioning effectiveness of the wire-clamping structure.
[0004] Therefore, it is indeed necessary to provide an improved stator to overcome the shortcomings of the prior art. [Utility Model Content]
[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a stator that can better fix the lead wires of the winding to the stator end plate.
[0006] The technical solution adopted by this utility model to solve the existing technical problems is as follows: a stator, including a stator core, a stator end plate installed at the end of the stator core, a winding wound on the stator core and the stator end plate, and a lead-out structure disposed on the outer periphery of the stator end plate. The winding includes a lead-out wire electrically connected to an external power source, and the winding is electrically connected to the external power source via the lead-out wire. The lead-out structure includes a wire-clamping plate that holds the lead-out wire. The wire-clamping plate is fixed to the radially outer side of the stator end plate, and the axial upper end of the wire-clamping plate extends beyond the axial upper end of the stator end plate.
[0007] A further improvement is as follows: the wire clamping plate includes a fixing part extending beyond the upper axial end of the stator end plate and a wire clamping part located at the lower axial end of the fixing part, and the lead wire is clamped to the wire clamping part via the fixing part.
[0008] A further improvement is as follows: the stator end plate extends outward along the axial direction to form a first protrusion, the first protrusion being located on the radially outer side of the winding; the first wire in the lead-out wire exits from the winding and enters the lead-out structure through the radially outer side of the first protrusion.
[0009] A further improvement is as follows: the second wire in the lead-out wire comes out from the winding and enters the lead-out structure through the radial inner side of the first protrusion.
[0010] A further improvement is as follows: the stator end plate extends outward along the axial direction to form a second protrusion, the second protrusion being located on the radial outer side of the winding; the third wire of the lead wire exits from the winding and enters the lead wire structure through the circumferential side of the second protrusion.
[0011] A further improvement is as follows: the fourth wire in the lead-out wire comes out from the winding and enters the lead-out structure through the radial outer side of the first protrusion.
[0012] A further improvement is that the axial distance between the end face of the fixing part and the end face of the stator end plate is not less than 3mm.
[0013] A further improvement is that the inner diameter of the fixing part and the inner diameter of the wire clamping part are larger than the outer diameter of the stator core.
[0014] A further improvement is as follows: two adjacent wire clamping plates are equidistantly arranged, and the lead wire abuts against the opposite surfaces of the two adjacent wire clamping plates.
[0015] A further improvement is that the stator end plate and the outgoing wire structure are integrally formed by injection molding.
[0016] Compared with the prior art, this utility model has the following advantages: The lead-out structure includes a wire-clamping plate for fixing the lead-out wire. The lead-out wire is clamped in the wire-clamping plate, which is fixed to the radially outer side of the stator end plate, and the axial upper end of the wire-clamping plate extends beyond the axial upper end of the stator end plate. This arrangement ensures that the portions of two adjacent wire-clamping plates extending beyond the stator end plate clamp the lead-out wire, preventing the lead-out wire from loosening at that point and thus ensuring the wire-clamping plate can reliably fix the lead-out wire. [Image Description]
[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:
[0018] Figure 1 This is a three-dimensional schematic diagram of the stator of a preferred embodiment of the present invention;
[0019] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the stator from another angle;
[0020] Figure 3 yes Figure 2 The exploded view of the stator is shown below;
[0021] Figure 4 yes Figure 2A magnified view of a portion of the stator shown;
[0022] Figure 5 yes Figure 3 A three-dimensional schematic diagram of the stator end plate and outgoing wire structure shown;
[0023] Figure 6 yes Figure 4 A three-dimensional schematic diagram of the stator end plate and the outgoing wire structure from another angle, as shown;
[0024] Figure 7 yes Figure 5 The stator end plate and outgoing wire structure shown are cross-sectional views. [Detailed Implementation]
[0025] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
[0026] Please see Figures 1 to 7 The image shows a stator 100 according to this utility model. The stator 100 is installed on a brushless motor and drives the rotor to rotate through electromagnetic induction, which in turn drives the output shaft to rotate and drives the tool to work.
[0027] Please see Figures 1 to 4 As shown, the stator 100 includes a stator core 1, a stator end plate 2 fixed to the end of the stator core 1, and a winding 3 wound on the stator core 1 and the stator end plate 2. Multiple windings 3 are provided, and multiple windings 3 are connected in parallel in a star connection to form a whole. The tail ends of the windings 3 are connected together to form a neutral point, and the three beginning ends of the windings 3 are respectively connected to the three phases of the external power supply.
[0028] Furthermore, the stator end plate 2 has a lead-out structure 4 on its radial outer periphery. The winding 3 includes a lead-out wire 30 electrically connected to an external power source. The winding 3 is electrically connected to the external power source via the lead-out wire 30. The lead-out wire 30 is held in the lead-out structure 4 to be led out from the winding 3 to the outer periphery of the stator core 1. The lead-out wire 30 includes a first wire 31, a second wire 32, a third wire 33, and a fourth wire 34. The tail end of the fourth wire 34 is the neutral point formed by the parallel connection of the windings 3. The first wire 31, the second wire 32, and the third wire 33 are the three phase wires of the winding 3 and are electrically connected to the three phases of the external power source.
[0029] The stator 100 also includes insulating paper 5 inserted into the stator slot (not shown) of the stator core 1. The insulating paper 5 is used to achieve electrical insulation between the stator core 1 and the winding 3. The winding 3 is wound on the stator teeth (not shown) of the stator core 1. A slot (not shown) is formed between two adjacent stator teeth. A slot wedge 6 is inserted into the slot. The slot wedge 6 is used to achieve electrical insulation between the stator core 1 and the winding 3.
[0030] Please combine Figures 5 to 7 As shown, the lead-out structure 4 includes five clamping plates 40 that fix the lead-out wires 30 to the stator end plate 2. Each lead-out wire 30 is clamped between two adjacent clamping plates 40. The clamping plates 40 are fixed to the radial outer side of the stator end plate 2, so that the lead-out wires 30 are fixed to the axial end and radial outer side of the stator end plate 2. The lead-out wires 30 include the connection portion of the enameled wire of the winding 3 and the three-phase wire, which is clamped in the clamping plate 40 to prevent vibration-induced wire breakage at the connection point.
[0031] Furthermore, the upper axial end of the wire clamping plate 40 extends beyond the upper axial end of the stator end plate 2; the wire clamping plate 40 includes a fixing part 41 extending beyond the upper axial end of the stator end plate 2 and a wire clamping part 42 located at the lower axial end of the fixing part 41, the lead wire 30 passes through the fixing part 41 and is clamped in the wire clamping part 42; the axial distance between the end face of the fixing part 41 and the end face of the stator end plate 2 is not less than 3mm. With this configuration, the lead wire 30 is clamped in the fixing part 41 at the upper axial end of the stator end plate 2, and the lead wire 30 is clamped in the wire clamping part 42 at the radially outer side of the stator end plate 2; the lead wire 30 is fixed by the fixing part 41 at the upper axial end of the stator end plate 2, preventing the lead wire 30 in this part from becoming loose from the stator end plate 2.
[0032] After the lead wire 30 enters the fixing part 41, it bends at that point and enters the wire clamping part 42. The bent part of the lead wire 30 is fixed in the wire clamping plate 40, which prevents the lead wire 30 from coming loose and provides a good fixing effect.
[0033] The stator end plate 2 extends outward along the axial direction to form a first protrusion 20 and a second protrusion 21, which are located on the radially outer side of the winding 3. After the first wire 31 of the lead wire 30 exits from the winding 3, it passes through the radially outer side of the first protrusion 20 and enters the wire clamping plate 40 of the lead wire structure 4 along the end face of the stator end plate 2. After the second wire 32 of the lead wire 30 exits from the winding 3, it passes through the radially inner side of the first protrusion 20 and enters the wire clamping plate 40 of the lead wire structure 4. After the third wire 33 of the lead wire 30 exits from the winding 3, it passes through the circumferential side of the second protrusion 21 and enters the wire clamping plate 40 of the lead wire structure 4. After the fourth wire 34 of the lead wire 30 exits from the winding 3, it passes through the end face of the stator end plate 2 and enters the wire clamping plate 40 of the lead wire structure 4 along the radially outer side of the first protrusion 20.
[0034] Furthermore, the inner diameter of the fixing part 41 and the inner diameter of the wire clamping part 42 are larger than the outer diameter of the stator core 1, that is, there is a gap between the wire clamping plate 40 and the outer peripheral surface of the stator core 1; two adjacent wire clamping plates 40 are equidistantly arranged, and the lead wire 30 abuts against the opposing surfaces between the two adjacent wire clamping plates 40; the lead wire structure 4 and the stator end plate 2 are integrally injection molded with plastic.
[0035] This utility model is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions exist for the stator of this utility model without departing from its principles and scope. The scope of protection of this utility model is determined by the claims.
Claims
1. A stator, comprising a stator core, a stator end plate mounted to one end of the stator core, a winding wound around the stator core and the stator end plate, and a lead-out structure disposed on the outer periphery of the stator end plate, wherein the winding includes a lead wire electrically connected to an external power source, and the winding is electrically connected to the external power source via the lead wire; characterized in that: The lead-out structure includes a wire-clamping plate that holds the lead wire. The wire-clamping plate is fixed to the radially outer side of the stator end plate, and the axial upper end of the wire-clamping plate extends beyond the axial upper end of the stator end plate. The wire-clamping plate includes a fixing part extending beyond the axial upper end of the stator end plate and a wire-clamping part located at the axial lower end of the fixing part. The lead wire is held in place by the fixing part and the wire-clamping part. The stator end plate has a first protrusion extending outward along the axial direction, and the first protrusion is located radially outer side of the winding. The first wire in the lead wire exits from the winding and enters the lead-out structure radially outer side of the first protrusion.
2. The stator of claim 1, characterized in that: The second lead wire in the lead wire comes out from the winding and enters the lead wire structure through the radial inner side of the first protrusion.
3. The stator of claim 1, wherein: The stator end plate extends outward along the axial direction to form a second protrusion, which is located on the radial outer side of the winding; the third wire of the lead wire comes out from the winding and enters the lead wire structure through the circumferential side of the second protrusion.
4. The stator of claim 1, wherein: The fourth wire in the lead-out line comes out from the winding and enters the lead-out structure through the radial outer side of the first protrusion.
5. The stator of claim 1, wherein: The axial distance between the end face of the fixing part and the end face of the stator end plate is not less than 3mm.
6. A stator according to claim 5, characterised in that: The inner diameter of the fixing part and the inner diameter of the wire clamping part are larger than the outer diameter of the stator core, and there is a gap between the wire clamping plate and the outer peripheral surface of the stator core.
7. The stator of claim 1, wherein: The two adjacent wire clamping plates are equidistantly arranged, and the lead wire abuts against the opposite surfaces of the two adjacent wire clamping plates.
8. The stator of claim 1, wherein: The stator end plate and the outgoing wire structure are integrally formed by injection molding.