External rotor motor with stable outgoing line
By designing the stator assembly and rotor seat with wire outlet slots and pressure block structures in the external rotor motor, the problem of easy wire wear was solved, and stable wire output and high-reliability installation were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HOBBYWING ELECTRO-MECHANICS CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-17
AI Technical Summary
The existing external rotor motor has difficulty fixing the lateral wires at the outlet position, which makes the wire harness easily damaged by friction from the external rotor.
A stable wire output structure including a stator assembly and a rotor base was designed. By setting wire output slots and wire clamping blocks on the stator base, the wire clamping blocks and the stator base together clamp the wire bundle, thus avoiding wear on the wires when the rotor base rotates.
It achieves stable wire output, avoids wire harness wear, has a compact structure, is easy to install, and has high reliability.
Smart Images
Figure CN224138789U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of electric motors, and in particular to an external rotor motor with stable output. Background Technology
[0002] External rotor motors are space-saving, compact, and aesthetically pleasing, making them suitable for installation in impellers and providing excellent cooling.
[0003] Currently, the side-mounted conductors of external rotor motors are difficult to fix at the outlet position, so the outlet wires are usually not fixed. However, this method can easily lead to friction damage to the wire harness by the external rotor during actual operation. Therefore, to solve the above problems, this application proposes an external rotor motor with stable outlet wires that is easy to install and has high reliability. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an external rotor motor that is easy to install, highly reliable, and avoids wear on the external rotor, resulting in stable output lines.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] An external rotor motor with stable output, comprising:
[0007] A stator assembly, comprising a stator base, a stator core, a conductor bundle, a wire clamping block, and a plurality of stator coils, wherein the stator base has a radially formed outlet groove, the stator core is fitted onto the stator base, the stator coils are disposed within the stator core, one end of the conductor bundle is connected to each of the stator coils, and the other end of the conductor bundle passes through the outlet groove to extend outside the stator base, the wire clamping block is disposed within the outlet groove, and the wire clamping block, together with the stator base, clamps the conductor bundle; and
[0008] A rotor base is rotatably mounted on the stator base, and the stator core is located inside the rotor base.
[0009] Optionally, the stator base includes a base body and a shaft column, the shaft column is coaxially disposed on the base body, the base body and the shaft column are provided with a coaxial central hole, the rotor base is rotatably disposed in the central hole, and the stator core is sleeved on the shaft column.
[0010] Optionally, the rotor base includes a rotor housing and a central shaft, the central shaft being coaxially disposed within the rotor housing and rotatably disposed within the central hole, and the stator core being located inside the rotor housing.
[0011] Optionally, the cable outlet groove is provided with two opposing limiting protrusions, which are used to engage the pressure block.
[0012] Optionally, the stator assembly further includes two locking screws, which pass through the stator base and are screwed to the pressure block.
[0013] Optionally, the wire pressing block is provided with a wire pressing groove, and the inner sidewall of the wire pressing groove and the inner sidewall of the wire outlet groove together clamp the wire bundle.
[0014] Optionally, at least one wire pressing boss is also provided on the inner sidewall of the wire pressing groove, the wire pressing boss being used to clamp the wire bundle.
[0015] Optionally, the pressure block is further provided with a side pressure block, which is in contact with the outer wall of the stator base.
[0016] Optionally, the pressure block is made of metal or plastic.
[0017] Compared with the prior art, the present invention has at least the following advantages:
[0018] This utility model discloses a stable-output external rotor motor, comprising a stator assembly and a rotor housing. The stator assembly includes a stator housing, a stator core, a wire harness, a wire clamping block, and several stator coils. A wire outlet slot is radially formed in the stator housing. The stator core is fitted onto the stator housing, and the stator coils are disposed within the stator core. One end of the wire harness is connected to each stator coil, and the other end of the wire harness extends through the wire outlet slot to the outside of the stator housing. The wire clamping block is disposed within the wire outlet slot and is used to clamp the wire harness together with the stator housing. The rotor housing is rotatably mounted on the stator housing, with the stator core located within the rotor housing. Thus, by clamping and fixing the wire harness with the wire clamping block, wear on the wire harness when the rotor housing rotates relative to the stator housing can be effectively prevented. Furthermore, the stable-output external rotor motor of this application has a compact structure, is easy to install, and has high reliability. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of an external rotor motor with stable output lines according to one embodiment of the present invention;
[0021] Figure 2 for Figure 1 A cross-sectional schematic diagram of an external rotor motor with stable output lines is shown.
[0022] Figure 3 This is a schematic diagram of the stator base according to one embodiment of the present invention;
[0023] Figure 4 This is a schematic diagram of the pressure block according to one embodiment of the present invention.
[0024] Explanation of reference numerals in the attached figures:
[0025] 10. Stable output external rotor motor; 100. Stator assembly; 200. Rotor base; 110. Stator base; 120. Stator core; 130. Wire harness; 140. Wire pressing block; 1111. Outlet groove; 111. Base body; 112. Shaft column; 1112. Center hole; 210. Rotor housing; 220. Central shaft; 160. Bearing; 170. Snap ring; 1113. Limiting protrusion; 180. Locking screw; 141. Wire pressing groove; 142. Wire pressing boss; 190. Side pressing block. Detailed Implementation
[0026] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.
[0027] like Figures 1 to 4 As shown, an external rotor motor 10 with stable output includes a stator assembly 100 and a rotor base 200. The stator assembly 100 includes a stator base 110, a stator core 120, a wire harness 130, a wire clamping block 140, and a plurality of stator coils. A wire output groove 1111 is radially formed in the stator base 110. The stator core 120 is sleeved on the stator base 110. The stator coils are disposed inside the stator core 120. One end of the wire harness 130 is connected to each stator coil, and the other end of the wire harness 130 passes through the wire output groove 1111 to extend outside the stator base 110. The wire clamping block 140 is disposed inside the wire output groove 1111 and is used to clamp the wire harness 130 together with the stator base 110. The rotor base 200 is rotatably disposed on the stator base 110, and the stator core 120 is located inside the rotor base 200.
[0028] It should be noted that the stator core 120 is coaxially mounted on the stator base 110, and each stator coil is mounted on the stator core 120. For example, there are three stator coils, which are distributed at equal angles. One end of the three stator coils is interconnected, and the other end forms a wire bundle 130 that passes through the wire outlet slot 1111. The rotor base 200 is coaxially rotatably mounted on the stator base 110. The wire clamping block 140 is locked and fixed on the stator base 110, so that the wire clamping block 140 and the stator base 110 together clamp and fix the wire bundle 130 passing through the wire outlet slot 1111. In this way, by clamping and fixing the wire bundle 130 with the wire clamping block 140, wear on the wire bundle 130 can be effectively avoided when the rotor base 200 rotates relative to the stator base 110. Moreover, the external rotor motor 10 with stable wire output of this application has a compact structure, is easy to install, and has high reliability.
[0029] like Figure 2 and Figure 3 As shown, in one embodiment, the stator base 110 includes a base body 111 and a shaft post 112. The shaft post 112 is coaxially disposed on the base body 111. The base body 111 and the shaft post 112 are provided with a coaxial central hole 1112. The rotor base 200 is rotatably disposed in the central hole 1112, and the stator core 120 is sleeved on the shaft post 112.
[0030] It should be noted that the stator base 110 is integrally formed by the base body 111 and the shaft column 112. The shaft column 112 and the base body 111 are coaxially arranged. A central hole 1112 is opened on the base body 111, which passes through the shaft column 112. The rotor base 200 passes through the central hole 1112, so that the rotor base 200 can be coaxially rotated and mounted on the stator base 110.
[0031] like Figure 2 As shown, in one embodiment, the rotor base 200 includes a rotor housing 210 and a central shaft 220. The central shaft 220 is coaxially disposed inside the rotor housing 210 and rotatably disposed inside the central hole 1112. The stator core 120 is located inside the rotor housing 210.
[0032] It should be noted that the rotor base 200 is composed of an integrally formed rotor shell 210 and a central shaft 220. One end of the central shaft 220 is located on the inner wall of the rotor shell 210, and the other end of the central shaft 220 extends out of the rotor shell 210. In this way, by passing the central shaft 220 through the central hole 1112, the central shaft 220 can rotate stably relative to the central hole 1112.
[0033] like Figure 1 and Figure 2As shown, in one embodiment, two bearings 160 are installed in the central hole 1112, and the central shaft 220 passes through the two bearings 160 in sequence so that the stator core 120 is located inside the rotor housing 210, and a snap ring 170 is attached to the end of the central shaft 220 away from the rotor housing 210. The snap ring 170 is used to snap the bearings 160.
[0034] Thus, the rotor base 200 is rotatably connected to the stator base 110 through the bearing 160, and the central shaft 220 is fixed by the snap ring 170 to prevent the rotor base 200 from coming out of the bearing 160, thereby improving the structural stability of the external rotor motor 10 with stable output.
[0035] like Figure 3 As shown, in one embodiment, the cable outlet groove 1111 is provided with two opposing limiting protrusions 1113, which are used to engage the wire clamping block 140.
[0036] It should be noted that the two limiting protrusions 1113 are formed into a constricted structure at the opening position of the wire outlet groove 1111, so that the wire pressing block 140 can only be inserted into the wire outlet groove 1111 along the radial direction of the seat body 111, and cannot slide out of the wire outlet groove 1111 along the radial direction. Therefore, it can avoid the wire pressing block 140 from contacting the rotor seat 200 and wearing it, and improve the reliability of the wire pressing block 140.
[0037] like Figure 1 As shown, in one embodiment, the stator assembly 100 further includes two locking screws 180, which pass through the stator base 110 and are screwed to the wire pressing block 140.
[0038] It should be noted that the two locking screws 180 pass through the side of the base 111 away from the shaft 112 and are then screwed onto the wire clamping block 140, thus locking the wire clamping block 140 onto the base 111. This, in turn, allows the wire clamping block 140 and the base 111 to clamp and fix the wire harness 130. In one embodiment, the wire clamping block 140 is made of plastic, and the locking screws 180 are self-tapping screws. A smooth hole is formed in the wire clamping block 140, and the wire clamping block 140 is locked onto the base 111 by drilling the self-tapping screw into the smooth hole. Further, in another embodiment, the wire clamping block 140 is made of metal, and a threaded hole is formed in the wire clamping block 140. The locking screws 180 are screwed into the threaded hole to lock the wire clamping block 140 onto the base 111.
[0039] like Figure 4 As shown, in one embodiment, the wire clamping block 140 has a wire clamping groove 141, and the inner sidewall of the wire clamping groove 141 and the inner sidewall of the wire outlet groove 1111 together clamp the wire bundle 130. In this way, the wire clamping block 140 can reliably clamp and fix the wire bundle 130.
[0040] like Figure 4 As shown, in one embodiment, at least one wire pressing boss 142 is also provided on the inner sidewall of the wire pressing groove 141, and the wire pressing boss 142 is used to clamp the wire bundle 130.
[0041] It should be noted that when the wire clamping block 140 is locked and fixed by the locking screw 180, the wire clamping boss 142 presses against the outer sheath of the wire harness 130, ensuring that the wire harness 130 is reliably clamped and fixed by the wire clamping block 140.
[0042] like Figure 4 As shown, in one embodiment, the pressure block 140 is further provided with a side pressure block 190, which is in contact with the outer side wall of the stator base 110.
[0043] It should be noted that the inner wall of the edge pressure block 190 is adapted to fit the outer wall of the seat 111. This allows the wire pressure block 140 to be quickly and accurately pre-fixed in the wire outlet groove 1111, and then the wire pressure block 140 can be locked and fixed by the locking screw 180.
[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A stable output line external rotor motor, characterized by, include: A stator assembly, comprising a stator base, a stator core, a conductor bundle, a wire clamping block, and a plurality of stator coils, wherein the stator base has a radially formed outlet groove, the stator core is fitted onto the stator base, the stator coils are disposed within the stator core, one end of the conductor bundle is connected to each of the stator coils, and the other end of the conductor bundle passes through the outlet groove to extend outside the stator base, the wire clamping block is disposed within the outlet groove, and the wire clamping block, together with the stator base, clamps the conductor bundle; and A rotor base is rotatably mounted on the stator base, and the stator core is located inside the rotor base.
2. The external rotor motor with stable output according to claim 1, characterized in that, The stator base includes a base body and a shaft column. The shaft column is coaxially disposed on the base body. The base body and the shaft column have a coaxial central hole. The rotor base is rotatably disposed in the central hole. The stator core is sleeved on the shaft column.
3. The stable output line external rotor motor of claim 2, wherein, The rotor base includes a rotor housing and a central shaft. The central shaft is coaxially disposed inside the rotor housing and rotatably disposed within the central hole. The stator core is located inside the rotor housing.
4. The stable output line external rotor motor of claim 1, wherein The cable outlet groove is provided with two opposing limiting protrusions, which are used to engage the pressure block.
5. The stable output line external rotor motor of claim 4, wherein, The stator assembly also includes two locking screws, which pass through the stator base and are screwed to the pressure block.
6. The stable output line external rotor motor of claim 1, wherein, The pressure block has a pressure groove, and the inner wall of the pressure groove and the inner wall of the outlet groove together clamp the wire bundle.
7. The stable output line external rotor motor of claim 6, wherein At least one wire pressing boss is also provided on the inner side wall of the wire pressing groove, which is used to clamp the wire bundle.
8. The stable output line external rotor motor of claim 1, wherein, The pressure block is also provided with a side pressure block, which is in contact with the outer side wall of the stator base.
9. The stable output line external rotor motor of claim 1, wherein, The pressure block is made of metal or plastic.