Outer rotor brushless motor support fixing gear shaft structure

Abstract

The utility model discloses an outer rotor brushless motor support fixing gear shaft structure, which relates to the field of motor design and comprises a positioning support, and a rotating shaft is mounted in the middle of the positioning support in a running fit manner. A bottom plate and a copper wire winding are fixedly installed on the upper side of the positioning support, a rotating cover is fixedly installed at the upper end of the rotating shaft, a permanent magnet ring is fixedly installed on the inner side of the rotating cover, and the copper wire winding is installed in the permanent magnet ring in a clearance fit mode. A positioning cylinder is integrally formed in the middle of the upper side of the positioning support, the rotating shaft is rotatably mounted in the positioning cylinder in a matched mode, and the bottom end of the rotating shaft extends out of the positioning cylinder. One or more preset grooves are integrally formed in the bottom side of the positioning support, gear shafts are embedded and fixedly installed in the preset grooves in a one-to-one correspondence mode, and transmission gears are installed between the gear shafts and the rotating shafts in a matched mode; according to the utility model, secondary assembly and other processes can be avoided, the assembly error is reduced, the concentricity and perpendicularity of gear transmission are ensured, the variable speed driving is more stable, and the assembly efficiency of the brushless motor is also improved.

Description

Technical Field

[0001] This utility model relates to the field of motor design, and in particular to the structure of a fixed gear shaft for an external rotor brushless motor support. Background Technology

[0002] A brushless DC motor is a type of DC motor that does not use mechanical commutation contacts (carbon brushes). Instead, it uses an electronic controller to achieve commutation, replacing the traditional brushed DC motor. Therefore, it is also known as an electronically adjustable speed DC motor or an electronically commutated DC motor.

[0003] Current speed-changing mechanisms generally use a motor to drive gears for acceleration or deceleration. In the brushless motor structure industry, the gear shaft is assembled after the motor is assembled, and then a specific frame is used to assemble the gear shaft or other processes. This secondary assembly method may have large errors, making it difficult to ensure concentricity and perpendicularity, which affects assembly efficiency and actual use.

[0004] Therefore, it is necessary to design a new and improved structure that allows the gear shaft to be installed on the motor bracket before the motor assembly is completed. This ensures the concentricity and perpendicularity of the assembly, thereby improving the stability of the motor during speed change transmission. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model provides a technical solution that can solve the above problems.

[0006] An external rotor brushless motor support and fixed gear shaft structure includes a positioning support, wherein a rotating shaft is rotatably mounted in the middle of the positioning support;

[0007] A base plate and a copper wire winding are fixedly installed on the upper side of the positioning support. A rotating cover is fixedly installed on the upper end of the rotating shaft. A permanent magnet ring is fixedly installed on the inner side of the rotating cover. The copper wire winding is installed in the permanent magnet ring with a clearance fit.

[0008] The positioning support has an integrally formed positioning cylinder in the middle of its upper side. The rotating shaft is rotatably installed inside the positioning cylinder, and the bottom end of the rotating shaft extends out of the positioning cylinder.

[0009] The bottom side of the positioning support is integrally formed with one or more preset grooves, and gear shafts are embedded and fixedly installed in the preset grooves one by one. Transmission gears are installed between the gear shafts and the rotating shaft.

[0010] Furthermore, both the base plate and the copper wire winding have assembly holes formed in their middle sections, and these assembly holes are fitted onto the positioning cylinder.

[0011] Furthermore: a semi-circular limiting groove is integrally formed inside the assembly hole, and a semi-circular protrusion is integrally formed on the outer side of the positioning cylinder, with the semi-circular protrusion fitted into the semi-circular limiting groove with a clearance fit.

[0012] Furthermore, a thickened ring is provided on the bottom side of the preset groove, and the thickened ring is integrally formed and provided on the bottom side of the positioning support.

[0013] Furthermore: at least two preset grooves are provided, and at least two preset grooves are arranged in a circular array on the outside of the positioning cylinder and the rotating shaft. The gear shaft and the rotating shaft in the at least two preset grooves are connected by a planetary gear through a transmission gear for speed reduction transmission.

[0014] Furthermore, the preset groove is provided in three parts.

[0015] Furthermore, the upper side of the positioning support is integrally formed with three thickened edges, and preset grooves are respectively set on the bottom side of the thickened edges.

[0016] Furthermore, the thickened edge is integrally formed with a positioning hole, and the preset groove is a circular groove structure, with the positioning hole and the preset groove being concentrically arranged.

[0017] Furthermore, the upper and lower ends of the positioning cylinder are integrally formed with bearing grooves, and rolling bearings are installed in the bearing grooves with clearance fit. The rotating shaft is installed and fixed at the inner ring of the rolling bearings on the upper and lower sides.

[0018] Compared with the prior art, this utility model directly pre-installs the gear shaft on the positioning support of the brushless motor, and fixes the gear shaft into the pre-set groove of the positioning support by embedding, so as to complete the installation and fixation of the gear shaft before assembling the motor.

[0019] Furthermore, the transmission gear on the gear shaft is rotatably mounted on the gear shaft, and the transmission gear on the rotating shaft is fixedly mounted on the rotating shaft, thereby achieving precise transmission, ensuring the stability of the reduction transmission, and improving the service life of the brushless motor.

[0020] The beneficial effects of this utility model are: it avoids secondary assembly and other processes, effectively reduces assembly errors, ensures the concentricity and perpendicularity of the brushless motor drive, makes the speed change drive of the brushless motor more stable, and also improves the overall assembly efficiency of the brushless motor.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is an exploded structural diagram of the present invention;

[0025] Figure 3 This is an exploded structural diagram of the present invention from another perspective;

[0026] Figure 4 This is a schematic diagram of the installation structure of the positioning support;

[0027] Figure 5 This is a schematic diagram of the installation structure of the positioning support from another perspective.

[0028] The figure shows: 1. Positioning support; 2. Rotating shaft; 3. Base plate; 4. Copper wire winding; 5. Rotating cover; 6. Permanent magnet ring; 7. Positioning cylinder; 8. Pre-set groove; 9. Gear shaft; 10. Transmission gear; 11. Assembly hole; 12. Semi-circular limiting groove; 13. Semi-circular convex edge; 14. Thickened ring; 15. Thickened edge; 16. Positioning hole; 17. Bearing groove; 18. Rolling bearing. Detailed Implementation

[0029] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0030] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0031] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] like Figure 1-5 As shown, the structure of the external rotor brushless motor support fixing gear shaft 9 of this utility model includes a positioning support 1, and a rotating shaft 2 is rotatably mounted on the middle part of the positioning support 1.

[0035] The upper side of the positioning support 1 is fixedly installed with a base plate 3 and a copper wire winding 4, the upper end of the rotating shaft 2 is fixedly installed with a rotating cover 5, the inner side of the rotating cover 5 is fixedly installed with a permanent magnet ring 6, and the copper wire winding 4 is installed in the permanent magnet ring 6 with a clearance fit.

[0036] The positioning support 1 has an integrally formed positioning cylinder 7 in the middle of its upper side. The rotating shaft 2 is rotatably installed in the positioning cylinder 7, and the bottom end of the rotating shaft 2 extends out of the positioning cylinder 7.

[0037] The bottom side of the positioning support 1 is integrally formed with one or more preset grooves 8, and gear shafts 9 are embedded and fixedly installed in the preset grooves 8. A transmission gear 10 is installed between the gear shaft 9 and the rotating shaft 2.

[0038] The principle is as follows: the gear shaft 9 is pre-installed on the positioning support 1 of the brushless motor. The gear shaft 9 is fixed into the pre-set groove 8 of the positioning support 1 by inlaying. This allows the installation and fixation of the gear shaft 9 to be completed before assembling the motor, avoiding secondary assembly and other processes, effectively reducing assembly errors, ensuring the concentricity and perpendicularity of the brushless motor transmission, making it more stable in subsequent speed change drives, and also improving the overall assembly efficiency of the brushless motor.

[0039] Furthermore, both the base plate 3 and the copper wire winding 4 have assembly holes 11 formed in the middle, and the assembly holes 11 are fitted onto the positioning cylinder 7; this makes the installation of the base plate 3 and the copper wire winding 4 more stable and ensures the rapid assembly of the brushless motor.

[0040] Furthermore: a semi-circular limiting groove 12 is integrally formed inside the assembly hole 11, and a semi-circular protrusion 13 is integrally formed on the outer side of the positioning cylinder 7. The semi-circular protrusion 13 is fitted into the semi-circular limiting groove 12 with a clearance fit; this can ensure the stable assembly of the base plate 3 and the copper wire winding 4, and prevent rotation after assembly.

[0041] Furthermore, a thickened ring 14 is provided on the bottom side of the preset groove 8. The thickened ring 14 is integrally formed and provided on the bottom side of the positioning support 1; it can effectively increase the strength of the preset groove 8 and ensure the stable embedding and fixing of the gear shaft 9.

[0042] Furthermore: at least two preset grooves 8 are provided, and at least two preset grooves 8 are arranged in a circular array on the outside of the positioning cylinder 7 and the rotating shaft 2. The gear shaft 9 and the rotating shaft 2 in the at least two preset grooves 8 are connected by a transmission gear 10 to form a planetary gear for speed reduction transmission; a planetary speed reduction mechanism can be directly formed, avoiding secondary assembly, improving the concentricity and perpendicularity of the gear shaft 9, ensuring the stability of the speed reduction transmission, and also speeding up the assembly efficiency.

[0043] Furthermore, the preset groove 8 is provided in three parts, which can form a stable planetary deceleration mechanism.

[0044] Furthermore, the upper side of the positioning support 1 is integrally formed with three thickened edges 15, and the preset grooves 8 are respectively set on the bottom side of the thickened edges 15; this can effectively increase the strength of the preset grooves 8 and ensure the service life of the positioning support 1.

[0045] Furthermore, the thickened edge 15 is integrally formed with a positioning hole 16, and the preset groove 8 is a circular groove structure. The positioning hole 16 and the preset groove 8 are concentrically arranged with each other, which can ensure the stable installation of the gear shaft 9 in the preset groove 8.

[0046] Furthermore, the upper and lower ends of the positioning cylinder 7 are integrally formed with bearing grooves 17, and rolling bearings 18 are installed in the bearing grooves 17 with clearance fit. The rotating shaft 2 is installed and fixed at the inner ring of the rolling bearings 18 on the upper and lower sides; this can ensure the stable rotation of the rotating shaft 2 in the positioning cylinder 7.

[0047] Furthermore, the transmission gear on the gear shaft 9 is rotatably mounted on the gear shaft 9, and the transmission gear 10 on the rotating shaft 2 is fixedly mounted on the rotating shaft 2, thereby achieving precise transmission, ensuring the stability of the deceleration transmission, and improving the service life of the brushless motor.

[0048] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A support structure for fixing the gear shaft of an external rotor brushless motor, comprising a positioning support, wherein a rotating shaft is rotatably mounted on the center of the positioning support; characterized in that: A base plate and a copper wire winding are fixedly installed on the upper side of the positioning support. A rotating cover is fixedly installed on the upper end of the rotating shaft. A permanent magnet ring is fixedly installed on the inner side of the rotating cover. The copper wire winding is installed in the permanent magnet ring with a clearance fit. The positioning support has an integrally formed positioning cylinder in the middle of its upper side. The rotating shaft is rotatably installed inside the positioning cylinder, and the bottom end of the rotating shaft extends out of the positioning cylinder. The bottom side of the positioning support is integrally formed with one or more preset grooves, and gear shafts are embedded and fixedly installed in the preset grooves one by one. Transmission gears are installed between the gear shafts and the rotating shaft.

2. The external rotor brushless motor support fixed gear shaft structure according to claim 1, characterized in that: Both the base plate and the copper wire winding have assembly holes formed in the middle, and the assembly holes are fitted onto the positioning cylinder.

3. The external rotor brushless motor support fixed gear shaft structure according to claim 2, characterized in that: The assembly hole is integrally formed with a semi-circular limiting groove, and the outer side of the positioning cylinder is integrally formed with a semi-circular protrusion. The semi-circular protrusion is fitted into the semi-circular limiting groove with a clearance fit.

4. The external rotor brushless motor support fixed gear shaft structure according to claim 1, characterized in that: A thickened ring is provided on the bottom side of the preset groove, and the thickened ring is integrally formed and provided on the bottom side of the positioning support.

5. The external rotor brushless motor support fixed gear shaft structure according to claim 1, characterized in that: The preset groove is provided in at least two, and the at least two preset grooves are arranged in a circular array on the outside of the positioning cylinder and the rotating shaft. The gear shaft and the rotating shaft in the at least two preset grooves are connected by a planetary gear through a transmission gear to reduce speed.

6. The external rotor brushless motor support fixed gear shaft structure according to claim 5, characterized in that: There are three preset grooves.

7. The external rotor brushless motor support fixed gear shaft structure according to claim 6, characterized in that: The upper side of the positioning support is integrally formed with three thickened edges, and the preset grooves are respectively set on the bottom side of the thickened edges.

8. The external rotor brushless motor support fixed gear shaft structure according to claim 7, characterized in that: The thickened edge is integrally formed with a positioning hole, and the preset groove is a circular groove structure. The positioning hole and the preset groove are concentrically arranged.

9. The external rotor brushless motor support fixed gear shaft structure according to claim 1, characterized in that: The upper and lower ends of the positioning cylinder are integrally formed with bearing grooves, and rolling bearings are installed in the bearing grooves with clearance fit. The rotating shaft is installed and fixed at the inner ring of the rolling bearings on the upper and lower sides.

10. The external rotor brushless motor support fixed gear shaft structure according to claim 1, characterized in that: The transmission gear on the gear shaft is rotatably mounted on the gear shaft, and the transmission gear on the rotating shaft is fixedly mounted on the rotating shaft.

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