An easily installed external-rotating motor

Abstract

The utility model discloses an easy installation outer rotation motor, a plurality of T type openwork grooves are evenly dug on the circumference direction on both ends of the casing, the lower pointed end of T type openwork groove faces outward, to let the casing evenly form a plurality of pairs of foldable protruding parts on both ends, the outer edge of each end cover includes the inner connecting ring of casing connection and the outer blocking ring of the outside preventing the casing to come out, and the outer blocking ring and the inner connecting ring are integrally formed, and each end cover is connected with the casing by inserting the inner connecting ring into the casing, the recess is further equipped on the end cover on the position corresponding to each T type openwork groove, and the protruding part can be pressed to the recess bottom after downward folding. The utility model needs only first inserts the inner connecting ring of end cover into the casing, then folds and presses the protruding part beside T type openwork groove on the casing end portion to the recess bottom, and the installation speed is fast, and through further design, can conveniently adjust the counterweight, and the heat dissipation efficiency is good.

Description

Technical Field

[0001] This utility model belongs to the field of motor design, and in particular relates to an easy-to-install external rotating motor. Background Technology

[0002] Brushless external rotor motors are widely used in various fields due to their high power density and small size, such as in the manufacture of treadmills. A brushless external rotor motor typically includes a housing, end caps at both ends of the housing, an inner stator, an outer rotor, and a commutator housed within the housing. In existing brushless external rotor motors using an inner rotor and outer stator, the inner stator is installed inside the housing and has stator windings, while the outer rotor's main body surrounds the inner stator and has magnetic poles. When fixing the end caps, if the gap between the magnetic poles is small and the front and rear covers cannot be fixed with screws, it is usually necessary to set bosses at both ends of the housing for riveting, and to set notches on the front and rear covers. The end caps and housing are then fixed by riveting and bolting, which is a complex process and cumbersome to install. Therefore, there is a need to find a brushless external rotor motor with a simple, quick, and low-cost method for fixing the housing and end caps. Utility Model Content

[0003] The purpose of this utility model is to provide an easy-to-install external motor with a quick and convenient fixed installation of the housing and end cover, low manufacturing cost, and good heat dissipation effect.

[0004] This utility model is achieved through the following technical solution:

[0005] An easy-to-install external rotating motor includes a stator 1 located on the inner side and a rotor 2 located on the outer side, with a gap between the stator 1 and the rotor 2. Both ends of the stator 1 extend beyond the ends of the rotor 2 via connecting shafts. The rotor 2 includes a housing 3 with an inner hole 6. A plurality of magnetic tiles 5 are evenly arranged within the inner hole 6 and surround the stator 1. Both ends of the housing 3 are provided with end caps 4, with the end cap at the rear end being a rear end cap 4.2. The end caps located at the front end are front end caps 4.1. Both end caps are provided with heat dissipation holes 7 that communicate with the inner holes 6 of the housing. The heat dissipation holes 7 are evenly distributed on the end caps and penetrate through the end caps. The housing 3 has several T-shaped hollowed-out grooves 8 evenly cut along the circumferential direction at both ends. The lower tip of the T-shaped hollowed-out grooves faces outward, so that the housing 3 has several pairs of bendable protrusions 9 evenly formed at both ends. The outer edge of each end cap 4 includes an inner connecting ring 10 connected to the housing 3 and an outer retaining ring 11 located on the outside to prevent the housing 3 from falling out. The outer retaining ring 11 is integrally formed with the inner connecting ring 10. The outer diameter of the inner connecting ring 10 is adapted to the inner diameter of the housing 3. Each end cap 4 is connected to the housing 3 by inserting the inner connecting ring 10 into the housing 3. Corresponding to each T-shaped hollowed-out groove 8 Positionally, the end cap 4 is also provided with an arc-shaped groove 12 whose width matches the width of the T-shaped hollow groove. The groove 12 extends from the outer retaining ring 11 into the inner connecting ring 10, and its inward depth just exceeds the position of the protrusion 9, so that the protrusion 9 can be pressed down to the bottom of the groove 12 after bending downward. Because of the existence of the inward edge of the groove 12, the protrusion 9 after being pressed down can press the end cap 4 in the axial direction and prevent the end cap 4 from loosening in the axial direction. Specifically, due to the existence of the inward edge of the groove 12, a block is formed at this point for the protrusion 9 after being pressed down. Thus, the existence of the protrusion 9 after being pressed down can prevent the end cap 4 from loosening outward in the axial direction, thereby pressing the end cap 4 in the axial direction.

[0006] Preferably, the T-shaped hollow groove 8 has an arc-shaped transition structure at its lower tip to make the edge of the protrusion 9 next to it smooth.

[0007] Preferably, the inward edge of the groove has an angled structure so that the protrusion can be pressed down more smoothly.

[0008] Preferably, the outer retaining ring 11 is provided with a counterweight arc-shaped mounting groove 13 on its outer end face between each adjacent groove 12. When the motor is found to be unbalanced, a counterweight can be installed in the counterweight arc-shaped mounting groove 13 at a suitable position to make the motor run smoothly.

[0009] More preferably, the housing 3 has three T-shaped hollowed-out grooves 8 evenly cut along the circumferential direction at both ends, the outer retaining ring of the end cover has three grooves 12, and the outer retaining ring of the end cover also has three counterweight arc-shaped mounting grooves 13.

[0010] Preferably, at least one end cover 4 is also integrally formed with a plurality of fan blades 15, and the gaps between the fan blades form heat dissipation holes 7 on the end cover.

[0011] More preferably, the rear end cover 4.2 is also integrally formed with a plurality of fan blades 15, and the gaps between the fan blades form heat dissipation holes 7 on the end cover.

[0012] Furthermore, the rear cover 4.2 is provided with 5 fan blades, the shape of which is the same as that of a fan blade.

[0013] Preferably, the front end cover 4.1 is also fixedly connected to a pulley 14 so that the rotor 2 outputs driving force through the pulley. More preferably, the front end cover 4.1 and the pulley 14 are integrally formed.

[0014] The beneficial effects of this utility model are:

[0015] This utility model discloses a brushless external rotary motor with an ingenious structure. By setting several T-shaped perforated slots at the ends of the housing, several pairs of bendable protrusions are evenly formed on both ends of the housing. The end cap is designed to include an inner connecting ring and an outer retaining ring, and also features an arc-shaped groove on the end cap with a width matching the width of the T-shaped perforated slots and an inward depth just exceeding the protrusions. This allows for quick installation; simply insert the inner connecting ring of the end cap into the housing, then bend the protrusions next to the T-shaped perforated slots on the end of the housing downwards and press them to the bottom of the groove. Compared to the previous method of drilling holes in the housing and end cap and then fixing them together with bolts, installation is much more convenient. The manufacturing process of the shell and end caps is greatly reduced, and the precision requirements for manufacturing can be significantly lowered. In addition, when a counterweight arc-shaped mounting groove is set on the outer retaining ring, the balance of the motor can be easily adjusted by inserting the counterweight into the required position, making it highly practical. Furthermore, when both end caps are designed as an integral part of the end cap and fan blades, the rotor rotates along with the end caps during motor operation. The airflow stirred by the fan blades carries away the heat generated by the relative rotation of the stator and rotor through the heat dissipation holes, thereby improving the motor's heat dissipation efficiency, ensuring the stability of the motor's performance, preventing the motor from overheating and burning out, eliminating the need for an additional fan, saving costs, optimizing the motor structure, and making it highly practical and worthy of promotion. Attached Figure Description

[0016] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-section structure;

[0019] Figure 3 for Figure 1 A schematic diagram of the middle casing when it is in a transparent state;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 for Figure 1 The side view is also a schematic diagram of the structure after the protrusion on the end of the housing bends downwards into the groove on the end cover;

[0022] Figure 6 A schematic diagram of the three-dimensional structure of the housing and the two end caps.

[0023] Figure 7 for Figure 6 Enlarged view at point B in the middle;

[0024] Figure 8 for Figure 6 A schematic diagram of the disassembled structure;

[0025] Figure 9 This is a three-dimensional structural diagram of the rear end cover in an embodiment of this utility model. Detailed Implementation

[0026] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0027] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0028] like Figure 1-9As shown, an easy-to-install external rotating motor includes a stator 1 located on the inner side and a rotor 2 located on the outer side. There is a gap between the stator 1 and the rotor 2. Both ends of the stator 1 extend out of the rotor 2 via connecting shafts. The rotor 2 includes a housing 3 with an inner hole 6. Several magnetic tiles 5 are evenly arranged within the inner hole 6 and surround the stator 1. Both ends of the housing 3 are provided with end caps 4, with the end cap at the rear end being a rear end cap 4.2. The end caps located at the front end are front end caps 4.1. Both end caps are provided with heat dissipation holes 7 that communicate with the inner holes 6 of the housing. The heat dissipation holes 7 are evenly distributed on the end caps and penetrate through the end caps. The housing 3 has several T-shaped hollowed-out grooves 8 evenly cut along the circumferential direction at both ends. The lower tip of the T-shaped hollowed-out grooves faces outward, so that the housing 3 has several pairs of bendable protrusions 9 evenly formed at both ends. The outer edge of each end cap 4 includes an inner connecting ring 10 connected to the housing 3 and an outer retaining ring 11 located on the outside to prevent the housing 3 from falling out. The outer retaining ring 11 is integrally formed with the inner connecting ring 10. The outer diameter of the inner connecting ring 10 is adapted to the inner diameter of the housing 3. Each end cap 4 is connected to the housing 3 by inserting the inner connecting ring 10 into the housing 3. The position corresponding to each T-shaped hollowed-out groove 8 is as follows: On the end cap 4, an arc-shaped groove 12 with a width matching the width of the T-shaped hollow groove is also provided. The groove 12 extends from the outer retaining ring 11 into the inner connecting ring 10, and the inward depth just exceeds the position of the protrusion 9, so that the protrusion 9 can be pressed to the bottom of the groove 12 after bending downward. Because of the existence of the inward edge of the groove 12, the protrusion 9 after being pressed downward can press the end cap 4 in the axial direction and prevent the end cap 4 from loosening in the axial direction. Specifically, due to the existence of the inward edge 16 of the groove 12, a block is formed for the protrusion 9 after being pressed downward. Thus, the existence of the protrusion 9 after being pressed downward can prevent the end cap 4 from loosening outward in the axial direction, thereby pressing the end cap 4 in the axial direction.

[0029] The T-shaped hollow groove 8 has an arc-shaped transition structure at its lower tip to make the edge of the protrusion 9 next to it smooth.

[0030] The inward edge 16 of the groove 12 has an angled structure so that the protrusion 9 can be pressed down more smoothly.

[0031] On the outer end face of the outer retaining ring 11, between each adjacent groove 12, there is also a counterweight arc-shaped mounting groove 13. When it is found that the motor is running unbalanced, a counterweight can be installed in the counterweight arc-shaped mounting groove 13 at a suitable position to make the motor run smoothly.

[0032] In this embodiment, the housing 3 has three T-shaped hollowed-out grooves 8 evenly cut along the circumferential direction at both ends, the outer retaining ring of the end cover has three grooves 12, and the outer retaining ring of the end cover also has three counterweight arc-shaped mounting grooves 13.

[0033] The rear end cover 4.2 is also integrally formed with 5 fan blades 15, and the gaps between the fan blades form heat dissipation holes 7 on the end cover. The shape of the fan blades is the same as that of the fan blades.

[0034] The front end cover 4.1 is also fixedly connected to a pulley 14 so that the rotor 2 can output driving force through the pulley. The front end cover 4.1 and the pulley 14 are integrally formed.

[0035] Installation process:

[0036] When installing the end cap 4 onto the housing 3, first insert the inner connecting ring 10 of the end cap 4 into the housing 3, then bend the protrusion 9 next to the T-shaped hollow groove 8 on the end of the housing 3 downwards and press it to the bottom of the end cap groove 12. Specific details are as follows: Figure 4 and 5 As shown, this achieves the fixation of the end cover 4 and the housing 3.

[0037] This invention relates to a brushless external rotary motor with an ingenious structure. By setting several T-shaped perforated slots at the ends of the housing, several pairs of bendable protrusions are evenly formed on both ends of the housing. The end cap is designed to include an inner connecting ring and an outer retaining ring, and also features an arc-shaped groove on the end cap with a width matching the width of the T-shaped perforated slots and a depth just exceeding the protrusions. This allows for quick installation; compared to the previous method of drilling holes in the housing and end cap and then fixing them together with bolts, installation is much more convenient. The manufacturing process for the housing and end cap is also greatly reduced, and the precision requirements for manufacturing can be significantly lowered.

[0038] In addition, when a counterweight arc-shaped mounting groove is set on the outer retaining ring, the motor's running balance can be easily adjusted by inserting the counterweight into the required position when balance adjustment is needed, making it extremely practical.

[0039] Finally, when both end covers are designed as an integral part of the end cover and fan blades, during motor operation, the rotor rotates, causing the end covers to rotate as well. The airflow stirred by the fan blades carries away the heat generated by the relative rotation of the stator and rotor through the heat dissipation holes, thereby improving the motor's heat dissipation efficiency, ensuring the stability of the motor's performance, preventing the motor from overheating and burning out, eliminating the need for an additional fan, saving costs, optimizing the motor structure, and making it highly practical and worthy of promotion.

[0040] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. An easily installed external rotating motor, comprising an inner stator and an outer rotor, wherein there is a gap between the stator and the rotor, and both ends of the stator extend out of the two ends of the rotor via connecting shafts; the rotor includes a housing with an inner bore, wherein a plurality of magnetic tiles are evenly disposed within the inner bore and surround the stator, and both ends of the housing are provided with end caps, the end cap located at the rear end being the rear end cap and the end cap located at the front end being the front end cap, and both end caps are provided with heat dissipation holes communicating with the inner bore of the housing, the heat dissipation holes being evenly distributed on the end caps and penetrating the end caps, characterized in that... The housing has several T-shaped perforated slots evenly cut along the circumference at both ends, with the lower tip of the T-shaped perforated slots facing outwards, so that several pairs of bendable protrusions are evenly formed at both ends of the housing. The outer edge of each end cover includes an inner connecting ring connected to the housing and an outer retaining ring located on the outside to prevent the housing from falling out. The outer retaining ring and the inner connecting ring are integrally formed, and the outer diameter of the inner connecting ring is adapted to the inner diameter of the housing. Each end cover is connected to the housing by inserting the inner connecting ring into the housing. Corresponding to the position of each T-shaped perforated slot, the end cover also has an arc-shaped groove with a width that matches the width of the T-shaped perforated slot. The groove extends from the outer retaining ring into the inner connecting ring, and the depth of the groove extends inwards just beyond the position of the protrusion, so that the protrusion can be pressed to the bottom of the groove after bending downwards. Because of the existence of the inward edge of the groove, the protrusion after being pressed downwards can press the end cover tightly in the axial direction and prevent the end cover from loosening in the axial direction.

2. The easy-to-install external rotating motor according to claim 1, characterized in that, Each T-shaped cutout has an arc-shaped transition structure at its lower tip to make the protruding edge next to it smooth.

3. The easy-to-install external rotating motor according to claim 1, characterized in that, The inward edge of the groove has an angled structure.

4. The easy-to-install external rotating motor according to claim 1, characterized in that, On the outer end face of the outer retaining ring, between each adjacent groove, there is also an arc-shaped mounting groove for a counterweight block.

5. The easy-to-install external rotating motor according to claim 4, characterized in that, The casing has three T-shaped hollowed-out grooves evenly cut along the circumference at both ends. The outer retaining ring of the end cover has three grooves and three arc-shaped mounting grooves for counterweights.

6. The easy-to-install external rotating motor according to claim 1, characterized in that, At least one end cap is also integrally formed with several fan blades, and the gaps between the fan blades form heat dissipation holes on the end cap.

7. The easy-to-install external rotating motor according to claim 6, characterized in that, The rear end cover is also integrally formed with several fan blades, and the gaps between the fan blades form heat dissipation holes on the end cover.

8. The easy-to-install external rotating motor according to claim 1, characterized in that, The front end cover is also fixedly connected to a pulley so that the rotor can output driving force through the pulley.

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