Hollow brushless motor

Abstract

The utility model discloses a hollow brushless motor, which relates to the technical field of motors and comprises a support, a shell and a stator winding, and the support is provided with a channel penetrating through two ends and is used for constructing a hollow structure to adapt to the spatial layout requirement of equipment. The shell is arranged on the radial outer side of the support in a sleeving mode, the shell is provided with the bearing, the bearing is located at one end of the shell, the structure can be simplified while the function is achieved through the single bearing, operation vibration caused by the coaxial matching precision problem of the two ends of the support is avoided, machining precision can be reduced, and then cost is reduced. The shell and the support are rotationally connected through the bearing, the support is provided with a positioning ring matched with the inner side wall of the bearing, the shell is provided with a positioning edge matched with the outer side wall of the bearing, and the support and the shell are rapidly positioned after the bearing is installed. The stator winding is arranged on the outer side of the support and embedded in the shell, a clamping groove is formed in the radial outer side of the support, the stator winding is provided with a guide strip matched with the clamping groove, and rapid positioning and installation are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a hollow brushless motor. Background Art

[0002] Generally, brushless motors are used in small household appliances, industrial equipment, transportation equipment, etc., such as smart sweepers, smart robots, electric bicycles, etc., and have a wide range of application markets. With the continuous development of smart home devices, the current brushless motors are developing towards miniaturization. However, the brushless motors on the market still have problems such as complex structure, low installation efficiency, and unstable operation, which affect the operating efficiency of the equipment. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a hollow brushless motor with a simplified structure and improved operating stability.

[0004] According to an embodiment of the utility model, there is provided a hollow brushless motor, comprising:

[0005] A bracket having passages passing through both ends;

[0006] The housing is sleeved on the radial outer side of the bracket, the housing is provided with a bearing, the bearing is located at one end of the housing, the bearing realizes the rotation connection between the housing and the bracket, the bracket is provided with a positioning ring matched with the inner side wall of the bearing, and the housing is provided with a positioning edge matched with the outer side wall of the bearing;

[0007] The stator winding is arranged on the outside of the bracket and embedded in the shell. The radial outside of the bracket is provided with a clamping groove, and the stator winding is provided with a guide bar matched with the clamping groove.

[0008] The hollow brushless motor described in the utility model has at least the following beneficial effects: the embodiment is provided with a bracket, a housing and a stator winding, and the bracket has a channel running through both ends, which is used to construct a hollow structure to meet the spatial layout requirements of the equipment. The housing is sleeved on the radial outer side of the bracket, and the housing is provided with a bearing, and the bearing is located at one end of the housing. The provision of a single bearing can simplify the structure while realizing the function, avoiding the coaxial matching accuracy problem at both ends of the bracket and causing running vibration, and a single bearing helps to reduce the processing accuracy, thereby reducing costs. The bearing realizes the rotation connection between the housing and the bracket, the bracket is provided with a positioning ring that matches the inner side wall of the bearing, and the housing is provided with a positioning edge that matches the outer side wall of the bearing. Through the role of the positioning ring and the positioning edge, the bracket and the housing can be quickly positioned after the bearing is installed. The stator winding is arranged on the outer side of the bracket, and the stator winding is embedded in the housing. The radial outer side of the bracket is provided with a clamping groove, and the stator winding is provided with a guide strip that matches the clamping groove to achieve rapid positioning and installation.

[0009] According to the hollow brushless motor described in the utility model, the bearing comprises an inner ring and an outer ring, the inner ring cooperates with the positioning ring, and the outer ring cooperates with the positioning edge.

[0010] According to the hollow brushless motor described in the utility model, the stator winding includes a winding frame and a wire wound on the winding frame, and the guide bar is located on the winding frame.

[0011] According to the hollow brushless motor described in the utility model, the guide bar is provided with a process groove, and the process groove is located on the radial outer side of the guide bar.

[0012] According to the hollow brushless motor described in the utility model, a circuit board is provided on one end of the bracket away from the bearing, and a connecting edge for positioning the circuit board is provided on the bracket.

[0013] According to the hollow brushless motor described in the utility model, a wire outlet is provided on the bracket, and the wire outlet runs through two ends of the bracket.

[0014] According to the hollow brushless motor described in the utility model, a clearance portion is provided on one end of the bracket close to the bearing, the clearance portion is communicated with the wire outlet, and the clearance portion enables the wire outlet to communicate with the channel.

[0015] According to the hollow brushless motor described in the utility model, an extension portion is provided on the bracket, and the extension portion is provided with a mounting column connected to the circuit board, and the mounting column protrudes from the radial outer side of the extension portion.

[0016] According to the hollow brushless motor described in the utility model, at least two air-avoiding parts are provided, and the two air-avoiding parts are symmetrically arranged on the bracket.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 This is an exploded view of a hollow brushless motor in an embodiment of the utility model;

[0020] Figure 2 A cross-sectional view of a hollow brushless motor in an embodiment of the utility model;

[0021] Figure 3 This is a partial exploded view of a hollow brushless motor in an embodiment of the utility model;

[0022] Figure 4 It is an axonometric view of the bracket in the embodiment of the utility model.

[0023] Reference numerals:

[0024] Bracket 100; channel 101; positioning ring 102; snap-in groove 103; connecting edge 104; mounting column 105; extension portion 106; outlet 107; and air-avoiding portion 108;

[0025] Housing 110; bearing 111; inner ring 112; outer ring 113; positioning edge 114; connecting member 115; covering portion 116;

[0026] Winding frame 121; guide bar 122; process groove 123; circuit board 124. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 4The embodiment of the utility model provides a hollow brushless motor, including a bracket 100, a housing 110 and a stator winding. The bracket 100 has a channel 101 that passes through both ends, which is used to construct a hollow structure to meet the spatial layout requirements of the device. The housing 110 is sleeved on the radial outer side of the bracket 100. The housing 110 is provided with a bearing 111, and the bearing 111 is located at one end of the housing 110. The provision of a single bearing 111 can simplify the structure while achieving the function, avoiding the coaxial matching accuracy problem at both ends of the bracket 100 and causing running vibration, and the single bearing 111 helps to reduce the processing accuracy, thereby reducing the cost. The bearing 111 realizes the rotational connection between the housing 110 and the bracket 100. The bracket 100 is provided with a positioning ring 102 that cooperates with the inner wall of the bearing 111. The housing 110 is provided with a positioning edge 114 that cooperates with the outer wall of the bearing 111. The positioning ring 102 and the positioning edge 114 both protrude from the axial end face of the bracket 100. Through the action of the positioning ring 102 and the positioning edge 114, the bracket 100 and the housing 110 can be quickly positioned after the bearing 111 is installed.

[0032] Optionally, the stator winding is arranged on the outside of the bracket 100, and the stator winding is embedded in the housing 110. The bracket 100 is provided with a snap-in groove 103 on the radial outside, and the stator winding is provided with a guide bar 122 that matches the snap-in groove 103 to achieve rapid positioning and installation. Specifically, the snap-in groove 103 extends along the axial direction of the bracket 100, and the guide bar 122 and the snap-in groove 103 are matched with an arc surface, and the guide bar 122 is embedded in the snap-in groove 103. Further, referring to Figure 1 and Figure 3 The guide bar 122 is provided with a process groove 123, and the process groove 123 is located on the radial outer side of the guide bar 122, that is, the process groove 123 divides the guide bar 122 into two parts, left and right, and a certain space is reserved between the guide bar 122 and the process groove 123. Since the clamping groove 103 and the guide bar 122 have a certain error during processing, and multiple guide bars 122 are provided in the circumferential direction of the bracket 100, it is easy to cause misalignment and difficulty in installation during assembly. The provision of the process groove 123 helps to improve the fault tolerance rate, and can reduce the precision-machined surface, which helps to save processing time and reduce processing costs. Optionally, the stator winding includes a winding frame 121 and a wire wound on the winding frame 121, and the guide bar 122 is located on the winding frame 121.

[0033] Optionally, the bearing 111 includes an inner ring 112 and an outer ring 113, the inner side wall of the inner ring 112 cooperates with the radial outer side wall of the positioning ring 102, and the radial outer side wall of the outer ring 113 cooperates with the inner side wall of the positioning edge 114. Specifically, screw holes are provided on the inner ring 112 and the outer ring 113 of the bearing 111, and the inner ring 112 of the bearing 111 and the bracket 100, and the outer ring 113 of the bearing 111 and the housing 110 are all bolted. During installation, the bracket 100 and the housing 110 are directly positioned by the bearing 111 to achieve rapid installation. Optionally, the housing 110 includes a connecting member 115 and a covering portion 116, the connecting member 115 is located at one end of the housing 110, and the positioning edge 114 is located on the connecting member 115, and the connecting member 115 is connected to the bearing 111.

[0034] Optionally, refer to Figure 2 A circuit board 124 is provided at one end of the bracket 100 away from the bearing 111, and a connecting edge 104 for positioning the circuit board 124 is provided on the bracket 100. The connecting edge 104 cooperates with the radial inner side surface of the circuit board 124 to achieve positioning of the circuit board 124. Further, an extension portion 106 is provided on the bracket 100, and the extension portion 106 is located at one end of the bracket 100 where the circuit board 124 is installed. The extension portion 106 is provided with a mounting column 105 connected to the circuit board 124. The circuit board 124 is connected to the mounting column 105 by bolt connection, and the mounting column 105 protrudes from the radial outer side of the extension portion 106, which helps to reduce material consumption and achieve lightweight.

[0035] Reference Figure 1 and Figure 3 , the bracket 100 is provided with a wire outlet 107, and the wire outlet 107 runs through both ends of the bracket 100. The wire outlet 107 is used to allow the lead of the circuit board 124 to extend from the channel 101 of the bracket 100, so as not to occupy the end space of the bracket 100, which is conducive to the reasonable layout of the line. Optionally, a gap avoidance portion 108 is provided at one end of the bracket 100 close to the bearing 111, and the gap avoidance portion 108 is connected to the wire outlet 107, and the gap avoidance portion 108 connects the wire outlet 107 with the channel 101, so as to realize the layout of the line from the channel 101. Optionally, refer to Figure 4 There are at least two air-avoiding portions 108 and at least two wire outlets 107 , respectively, and the air-avoiding portions 108 and the wire outlets 107 are arranged correspondingly, and the two air-avoiding portions 108 and the wire outlets 107 are symmetrically arranged on the bracket 100 , or are evenly arranged in the circumferential direction of the bracket 100 .

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hollow brushless motor, characterized in that: include: A bracket having passages passing through both ends; A housing is sleeved on the radial outer side of the bracket, the housing is provided with a bearing, the bearing is located at one end of the housing, the bearing realizes the rotational connection between the housing and the bracket, the bracket is provided with a positioning ring matched with the inner side wall of the bearing, and the housing is provided with a positioning edge matched with the outer side wall of the bearing; The stator winding is arranged on the outside of the bracket and embedded in the shell. The radial outside of the bracket is provided with a clamping groove, and the stator winding is provided with a guide bar matched with the clamping groove.

2. A hollow brushless motor according to claim 1, characterized in that: The bearing comprises an inner ring and an outer ring, wherein the inner ring cooperates with the positioning ring, and the outer ring cooperates with the positioning edge.

3. The hollow brushless motor according to claim 1, characterized in that: The stator winding comprises a winding frame and a conducting wire wound on the winding frame, and the guide bar is located on the winding frame.

4. The hollow brushless motor according to claim 1, characterized in that: The guide bar is provided with a process groove, and the process groove is located on the radial outer side of the guide bar.

5. The hollow brushless motor according to claim 1, characterized in that: A circuit board is provided on one end of the bracket away from the bearing, and a connecting edge for positioning the circuit board is provided on the bracket.

6. The hollow brushless motor according to claim 1, characterized in that: The bracket is provided with a wire outlet, and the wire outlet passes through two ends of the bracket.

7. The hollow brushless motor according to claim 6, characterized in that: An escape portion is provided at one end of the bracket close to the bearing, the escape portion is communicated with the wire outlet, and the escape portion enables the wire outlet to communicate with the channel.

8. The hollow brushless motor according to claim 5, characterized in that: The bracket is provided with an extension portion, and the extension portion is provided with a mounting column connected to the circuit board, and the mounting column protrudes radially outward of the extension portion.

9. The hollow brushless motor according to claim 7, characterized in that: At least two of the air avoidance portions are provided, and the two air avoidance portions are symmetrically arranged on the bracket.

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