An electric machine

Abstract

The application provides a motor, comprising: a motor assembly comprising a rotor and a stator; the rotor comprises a rotating shaft; one end of a motor shell is provided with an opening, the motor shell integrally extends downward to a bottom through a circumferential side wall of the motor shell from the opening to contain the motor assembly; the bottom of the motor shell is provided with a rotating shaft through hole, and the rotating shaft penetrates through the rotating shaft through hole; an opening cover is arranged on the opening of the motor shell; an end cover is arranged on the surface of the side of the opening cover away from the motor shell; the end cover is connected with the opening cover to form a space containing a circuit board; one of the opening cover and the end cover is provided with a first limiting column and a second limiting column, and the other of the opening cover and the end cover is provided with a first limiting groove matched with the first limiting column and a second limiting groove matched with the second limiting column; the first limiting groove and the second limiting groove are located on the side of the end cover facing the opening cover; the shapes of the first limiting column and the second limiting column are different, so that the assembly position of the opening cover and the end cover is unique, and the assembly accuracy is ensured.

Description

Technical Field

[0001] This application relates to the field of cleaning, and in particular to an electric motor. Background Technology

[0002] In the existing technology, the assembly of motor components is complex, and the accuracy of assembly depends on human experience, which leads to unstable assembly results and makes it impossible to guarantee the stable operation of the motor. Utility Model Content

[0003] This application aims to solve at least one of the above-mentioned problems by providing a motor, comprising:

[0004] Motor assembly, which includes a rotor and a stator; the rotor includes a shaft;

[0005] The motor housing has an opening at one end, and extends integrally downwards from the opening through the circumferential sidewall of the motor housing to the bottom to accommodate the motor assembly; the bottom of the motor housing has a shaft through hole, through which the shaft passes.

[0006] An open cover is provided to cover the opening of the motor housing;

[0007] Circuit board and end cap; the end cap is located on the surface of the open cover opposite to the motor housing; the end cap and the open cover are connected to form a space that encloses the circuit board; wherein

[0008] One of the open cover and the end cover is provided with a first limiting post and a second limiting post, and the other of the open cover and the end cover is provided with a first limiting groove that cooperates with the first limiting post and a second limiting groove that cooperates with the second limiting post; the first limiting groove and the second limiting groove are located on the side of the end cover facing the open cover; the first limiting post and the second limiting post have different shapes, so that the assembly position of the open cover and the end cover is unique.

[0009] Preferably, the first limiting post is configured to be inserted into the first limiting groove, such that the outer surface of the first limiting post is in contact with the inner surface of the first limiting groove; and the second limiting post is configured to be inserted into the second limiting groove, such that the outer surface of the second limiting post is in contact with the inner surface of the second limiting groove; wherein

[0010] The outer surface contour of the first limiting post and the inner surface contour of the second limiting groove are set to be different or not similar, so that the first limiting post cannot be inserted into the second limiting groove, or the first limiting post cannot be fixedly inserted into the second limiting groove; and the outer surface contour of the second limiting post and the inner surface contour of the first limiting groove are set to be different or not similar, so that the second limiting post cannot be inserted into the first limiting groove, or the second limiting post cannot be fixedly inserted into the first limiting groove.

[0011] Preferably, the open cover is provided with a first limiting post and a second limiting post; the first limiting post and the second limiting post are disposed toward the end cover; the first limiting post and the second limiting post are disposed on the outer periphery of the open cover and are disposed opposite to each other along the radial direction of the open cover.

[0012] Preferably, the end cap is provided with a first limiting groove and a second limiting groove; the first limiting groove and the second limiting groove are disposed toward the open cap; the first limiting groove and the second limiting groove are disposed on the outer periphery of the end cap and are disposed opposite to each other along the radial direction of the end cap.

[0013] Preferably, the open cover is provided with a first limiting groove and a second limiting groove; the first limiting groove and the second limiting groove are disposed toward the end cover; the first limiting groove and the second limiting groove are disposed on the outer periphery of the open cover and are disposed opposite to each other along the radial direction of the open cover.

[0014] Preferably, the end cap is provided with a first limiting post and a second limiting post; the first limiting post and the second limiting post are disposed toward the open cap; the first limiting post and the second limiting post are disposed on the outer periphery of the end cap and are disposed opposite to each other along the radial direction of the end cap.

[0015] Preferably, the open cover has a protruding plate extending from one side surface facing the motor housing, a portion of the protruding plate is arranged around the outer periphery of the stator, and another portion of the protruding plate is arranged abutting against the stator; the open cover is used to cooperate with the motor housing to enclose and fix the motor assembly.

[0016] Preferably, the motor includes:

[0017] The fixed bracket is clamped at both ends of the stator; the open cover is provided with a fixing through hole, through which the fixed bracket extends and protrudes from the open cover; wherein

[0018] The circuit board is provided with limiting holes, and the circuit board is fitted onto the fixing bracket through the limiting holes so that the circuit board is fixed in a horizontal position relative to the open cover by the fixing bracket.

[0019] Preferably, the end cap is provided with a terminal through hole and a power through hole; the circuit board is provided with a terminal and a power interface; when the first limiting post is connected to the first limiting groove, and when the second limiting post is connected to the second limiting groove, the terminal is exposed in the terminal through hole, and the power interface is exposed in the power through hole.

[0020] Preferably, a heat sink is vertically arranged on the side of the open cover facing the motor housing, and the heat sink is evenly arranged along the outer periphery of the open cover; the heat sink is arranged around the outer periphery of the open and surrounds the open; the heat sink has a gap with the open in the radial direction of the rotating shaft.

[0021] Preferably, the motor further includes an upper bearing and a lower bearing; wherein, the side of the open cover facing the motor housing is recessed in a direction away from the motor housing to form an upper bearing chamber; and a lower bearing chamber is provided at the shaft through hole of the motor housing;

[0022] The upper bearing is installed in the upper bearing chamber, and the upper bearing is sleeved on the rotating shaft and positioned between the rotor and the open cover;

[0023] The lower bearing is located in the lower bearing chamber, and the lower bearing is sleeved on the rotating shaft and located between the rotor and the motor housing.

[0024] Preferably, the circumferential sidewall of the motor housing is provided with a step, the inner edge of the step surface is set as a second radius, and the outer edge of the step surface is set as a first radius; a third limiting groove is provided at the connection point where the sidewall extends to the bottom; the motor also includes:

[0025] The impeller includes a sleeve and an outer wall; a guide plate is provided between the sleeve and the outer wall; the sleeve of the impeller is equipped with a first limiting protrusion in conjunction with the third limiting groove, and the first limiting protrusion is formed by the inner wall of the sleeve protruding towards the direction of the rotation axis.

[0026] Preferably, the inner diameter of the sleeve is set to the second radius, and the outer diameter of the sleeve is set to be greater than or equal to the first radius; with the first limiting protrusion engaged in the third limiting groove, the sleeve of the fixed impeller abuts upward against the step; and the sleeve of the fixed impeller is positioned between the opening of the motor housing and the bottom of the motor housing in a direction parallel to the rotating shaft.

[0027] Preferably, the motor further includes:

[0028] The wind guide wheel includes a main body and wind guide blades; the upper surface of the main body covers the bottom of the motor housing, the outer diameter of the main body is set as a first radius, and the inner diameter of the main body is set to be smaller than a second radius;

[0029] The main body is installed at the bottom of the motor housing; the main body is fixedly connected to the motor housing to clamp and fix the impeller; the main body extends to the outer wall of the impeller to form a guide vane, the guide vane abuts against the outer wall of the impeller, and together with the guide plate, forms a gas channel.

[0030] Preferably, a sealing ring is provided on the bottom of the motor housing, protruding away from the opening, and the sealing ring is provided with a second limiting protrusion; a fourth limiting groove is provided on the inner side of the main body of the guide wheel; the inner side of the main body is fitted onto the sealing ring, so that the second limiting protrusion is located in the fourth limiting groove, thereby fixing the relative position of the main body with respect to the motor housing.

[0031] Preferably, the motor further includes:

[0032] The moving impeller is fixedly connected to the rotating shaft and is located on the side of the fixed impeller away from the motor housing. The moving impeller generates low pressure in response to the rotation of the rotating shaft, so that the gas flows from the moving impeller to the fixed impeller.

[0033] Preferably, the motor further includes a fan shroud; the fan shroud is detachably connected to the outer wall of the fixed impeller; the fan shroud is connected to the outer wall of the fixed impeller to enclose the moving impeller.

[0034] Preferably, the motor is used in a vacuum cleaner, thus constituting a vacuum cleaner motor.

[0035] The motor provided in this application reduces the assembly difficulty of the motor and ensures the assembly accuracy of the various components of the motor by providing a first limiting groove and a first limiting post that are configured to cooperate with each other.

[0036] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0037] To more clearly illustrate the technical solution of this utility model, 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.

[0038] Figure 1 This is a schematic diagram of the structure of the motor disclosed in this application;

[0039] Figure 2 This is a cross-sectional view of the electric motor disclosed in this application;

[0040] Figure 3 This is another cross-sectional view of the electric motor disclosed in this application;

[0041] Figure 4 This is a schematic diagram showing the relative relationship between the motor assembly and the mounting bracket disclosed in this application;

[0042] Figure 5 This is a cross-sectional view showing the relative relationship between the motor assembly and the mounting bracket disclosed in this application;

[0043] Figure 6 This is a schematic diagram showing the assembly relationship of the end cap, circuit board, and open cap disclosed in this application;

[0044] Figure 7 This is a schematic diagram of the end cap structure disclosed in this application;

[0045] Figure 8 This is a schematic diagram of the structure of the open cover disclosed in this application;

[0046] Figure 9 This is another cross-sectional view of the electric motor disclosed in this application;

[0047] Figure 10This is a schematic diagram of the structure of the fixed impeller disclosed in this application;

[0048] Figure 11 This is a schematic diagram of the assembly state of the stator impeller and the motor housing disclosed in this application;

[0049] Figure 12 This is a schematic diagram of the wind guide wheel disclosed in this application;

[0050] Figure 13 This is a schematic diagram and a partial enlarged view of the assembly state of the fixed impeller, guide vane and motor housing disclosed in this application;

[0051] Figure 14 This is a schematic diagram of the moving impeller disclosed in this application;

[0052] Figure 15 This is a schematic diagram of the windshield disclosed in this application;

[0053] Figure 16 This is a schematic diagram of the structure of each component of the motor disclosed in this application. Detailed Implementation

[0054] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0055] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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 on this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In a first aspect, this application provides an electric motor, comprising:

[0057] Reference Figure 1 and Figure 2 as well as Figure 16This application provides an electric motor, which includes a motor assembly 11, a motor housing 12, an opening cover 13, and a circuit board 14. The motor assembly 11 includes a stator 111, a rotor 112, and a rotating shaft 113. The rotor 112 is fixedly connected to the rotating shaft 113 so that the rotation of the rotor 112 can be output through the rotating shaft 113. The rotor 112 and the rotating shaft 113 are sleeved inside the stator 111 and together contained within the motor housing 12. An opening 121 is provided at one end to allow the motor assembly 11 to be inserted into the motor housing 12. A rotating shaft through hole 124 is provided at the bottom of the motor housing 12 relative to the opening 121. The rotating shaft 113 of the motor assembly 11 contained within the motor housing 12 can pass through the rotating shaft through hole 124 to extend out of the motor housing 12, thereby outputting power outward through the rotating shaft 113. The motor housing 12 has an opening 121 at one end that extends through the side wall 122 to the bottom shaft through hole 124 and is integrally formed, so that the motor housing 12 encloses the motor assembly 11 and maintains a relatively sealed configuration.

[0058] An open cover 13 is provided over the open end 121 of the motor housing 12 to form a relatively closed cavity, thereby enclosing the motor assembly 11. A protruding plate extends from the surface of the open cover 13 facing the motor housing 12. The protruding plate is inserted into the motor housing 12 and conforms to the inner wall of the motor housing 12. Correspondingly, the inner wall of the motor housing 12 is provided with a slide matching the shape of the protruding plate, so that the motor housing 12 can maintain a fixed relative position with the open cover 13, and the open cover 13 can be accurately inserted into the motor housing 12 to form a cavity enclosing the motor assembly 11. The protruding plate is disposed near the outer periphery of the open cover 13 and surrounds the outer side of the stator 111 of the motor assembly 11, and extends towards the shaft 113 at the end of the stator 111, so that while the protruding plate abuts against the inner wall of the motor housing 12, it works with the motor housing 12 to clamp the stator 111, thereby fixing the relative position of the stator 111 with respect to the motor housing 12.

[0059] The end cap 15 is placed on the side of the open cover 13 facing away from the motor housing 12, leaving a space between them when the end cap 15 is placed on the open cover 13. This space is used to accommodate the circuit board 14, which is used to control the motor to perform corresponding operations according to user commands. The end cap 15 is provided with a first limiting groove 151 and a second limiting groove 152, and the open cover 13 is provided with a first limiting post 132 and a second limiting post 133. The first limiting post 132 and the second limiting post 133 have different shapes, as do the first limiting groove 151 and the second limiting groove 152. However, the first limiting groove 151 and the first limiting post 132 are configured to cooperate with each other, with the first limiting post 132 able to be inserted into the first limiting groove 151; the second limiting groove 152 and the second limiting post 133 are configured to cooperate with each other, with the second limiting post 133 able to be inserted into the second limiting groove 152. The open cover 13 and the end cover 15 are interlocked by the cooperation of the first limiting groove 151 and the first limiting post 132, and the cooperation of the second limiting groove 152 and the second limiting post 133. This fixes the relative positional relationship between the open cover 13 and the end cover 15 in the connected state, thereby ensuring that the openings provided for the circuit board 14 on the end cover 15 correspond one-to-one with the terminals 142 of the circuit board 14. This ensures that the terminals 142 of the circuit board 14 are exposed on the outer surface of the motor in the correct position, thereby reducing the assembly difficulty of the motor and ensuring the assembly accuracy of the various components of the motor.

[0060] In some specific embodiments, the motor provided in this application can convert electrical energy into kinetic energy. Due to its miniaturized structure, the motor can be installed in a vacuum cleaner, generating airflow through connection with a fan or impeller to produce suction. Similarly, the motor provided in this application can also be installed in a floor scrubber, generating negative pressure through suction to remove liquid or solid debris from the floor. It is understood that the motor provided in this application can be used in cleaning equipment such as vacuum cleaners and floor scrubbers to provide negative pressure and suck up debris from the surface to be cleaned to a designated location.

[0061] In some embodiments, refer to Figure 7The first limiting post 132 and the first limiting groove 151 are nearly identical in shape and size, with only slight dimensional differences, so that the first limiting post 132 can be inserted into the first limiting groove 151, and the outer surface of the first limiting post 132 and the inner surface of the first limiting groove 151 are completely fitted together. The end cap 15 and the open cap 13 are locked by the insertion of the first limiting post 132 and the first limiting groove 151. Similarly, the outer surface of the second limiting post 133 and the inner surface of the second limiting groove 152 are nearly identical, with only slight dimensional differences, so that the second limiting post 133 can be inserted into the second limiting groove 152, and the outer surface of the second limiting post 133 and the inner surface of the second limiting groove 152 are completely fitted together. The end cap 15 and the open cap 13 are locked by the insertion of the second limiting post 133 and the second limiting groove 152. It is understandable that the shapes of the first limiting post 132 and the second limiting groove 152 should be different, and the shapes of the second limiting post 133 and the first limiting groove 151 should also be different, so that the first limiting post 132 cannot be inserted into the second limiting groove 152, or even if it can be accommodated within the space of the second limiting groove 152, it cannot be locked by engaging the outer surface of the first limiting post 132 with the inner surface of the second limiting groove 152. For example, the shape of the first limiting post 132 is the same as the shape of the second limiting groove 152, but the second limiting groove 152 is a proportionally enlarged version of the first limiting post 132. The relationship between the second limiting post 133 and the first limiting groove 151 is similar to the relationship between the first limiting post 132 and the second limiting groove 152, that is, the second limiting post 133 cannot engage with and lock the first limiting groove 151. This ensures that even if the first limiting post 132 is mistakenly inserted into the second limiting groove 152 and the second limiting post 133 is mistakenly inserted into the first limiting groove 151 during the assembly process of the end cap 15 and the open cap 13, the assembly error of the end cap 15 and the open cap 13 can still be confirmed by the inability to fix them, and avoids damage to the first limiting groove 151, the second limiting groove 152, the first limiting post 132, and the second limiting post 133 caused by mistaken insertion.

[0062] In some embodiments, a first limiting post 132 and a second limiting post 133 are disposed on the end cap 15, and a first limiting groove 151 and a second limiting groove 152 are disposed on the open cap 13. The first limiting post 132 and the second limiting post 133 are disposed on the surface of the end cap 15 facing the open cap 13, and are located on the outer periphery of the end cap 15, and are radially symmetrical about the end cap 15. A first limiting groove 151, which cooperates with the first limiting post 132, is disposed on the open cap 13, and a second limiting groove 152, which cooperates with the second limiting post 133, is disposed on the open cap 13. The first limiting groove 151 and the second limiting groove 152 are disposed on the surface facing the end cap 15, and are radially symmetrical about the open cap 13. The first limiting post 132 and the second limiting post 133 of the end cap 15 are inserted into the first limiting groove 151 and the second limiting groove 152, forming an enclosing space. The circuit board 14 can be contained in this space and is positioned between the end cover 15 and the open cover 13 according to the fixed assembly relationship between the end cover 15 and the open cover 13.

[0063] In some embodiments, refer to Figures 3 to 5 The motor includes:

[0064] The motor also includes a fixing bracket 16. The fixing bracket 16 is disposed within the cavity formed by the motor housing 12 and the open cover 13. The fixing bracket 16 includes an upper bracket 161 and a lower bracket 162. The upper bracket 161 is inserted into the teeth of the stator 111 and disposed between the open cover 13 and the stator 111. The lower bracket 162 is inserted into the teeth of the stator 111 and engages with the upper bracket 161 between the teeth of the stator 111, and is disposed between the stator 111 and the bottom of the motor housing 12. The upper bracket 161 and the lower bracket 162 are fixed to the stator 111 assembly through insertion into the stator 111 and mutual engagement, maintaining relative fixation with the stator 111 assembly. The fixing bracket 16 also includes a limiting plate 163, which is inserted into the upper bracket 161 and extends towards the open cover 13. The open cover 13 is provided with a second limiting hole 136 corresponding to the limiting plate 163. When the open cover 13 is connected to the motor housing 12, the second limiting hole 136 of the open cover 13 is sleeved on the limiting plate 163. The limiting plate 163 extends out from the limiting hole 141 and the second limiting hole 136 in sequence and protrudes from the surface of the open cover 13 away from the motor housing 12, so that the circuit board 14 is limited by the limiting plate 163 in the direction of the rotating shaft 113, so as to prevent the circuit board 14 from sliding relative to the open cover 13 and maintain the overall structural stability of the motor.

[0065] In some embodiments, refer to Figure 6 and Figure 7The end cover 15 is provided with terminal through holes 153 and power through holes 154 corresponding to the electrical connection between the circuit board 14 and the motor. The circuit board 14 transmits signals through terminals 142 and obtains power from the power supply 143. When the end cover 15 is connected to the first limiting post 132 and the second limiting post 133 of the open cover 13 via the first limiting groove 151 and the second limiting groove 152, the terminals 142 of the circuit board 14, which are fixed by the limiting posts, are exposed to the outer surface of the motor through the terminal through holes 153, and the power supply 143 of the circuit board 14 is exposed to the outer surface of the motor through the power through holes 154. It can be understood that the motor control handle is inserted into the end cover 15, so that the control handle is electrically connected to the exposed terminals 142 and the power supply 143 of the circuit board 14 through the end cover 15, thereby realizing the control of the electronic control system by the handle when the motor is working.

[0066] In some embodiments, refer to Figure 6 as well as Figure 16 When the first limiting post 132 and the second limiting post 133 are disposed on the open cover 13, and the first limiting groove 151 and the second limiting groove 152 are disposed on the end cover 15, the first limiting post 132 and the second limiting post 133 are provided with platforms. The platforms of the first limiting post 132 and the second limiting post 133 are disposed on a plane parallel to the open cover 13. The platforms of the first limiting post 132 and the second limiting post 133 extend downward to the plane of the open cover 13 away from the motor housing 12, so that the plane where the platforms of the first limiting post 132 and the second limiting post 133 are located are at a certain distance from the plane of the open cover 13 away from the motor housing 12. The circuit board 14 is provided with a clearance groove at the position corresponding to the first limiting post 132 and the second limiting post 133. The circuit board 14 is locked in the first limiting post 132 and the second limiting post 133 through the clearance groove, and is placed on the platform of the first limiting post 132 and the second limiting post 133 under the action of gravity. This makes the assembly relationship between the circuit board 14, the opening cover 13 and the end cover 15 unique, thereby ensuring that the terminals on the circuit board 14 can be exposed under the terminal through hole 153 and that the power supply on the circuit board 14 can be exposed under the power through hole 154, thereby ensuring the accurate assembly of the motor.

[0067] In some embodiments, refer to Figure 1 , Figure 2 as well as Figure 8Multiple heat sinks 134 are provided on the side of the open cover 13 facing the motor housing 12. The heat sinks 134 are integrally formed with the open cover 13. The air exhausted from the motor blows onto the heat sinks 134, thereby achieving the heat dissipation function. Specifically, the heat sinks 134 are evenly distributed near the outer periphery of the open cover 13. The edges of the heat sinks 134 are flush with the outer periphery of the open cover 13 to ensure the overall structure of the motor is neat. The arrangement of the heat sinks 134 forms a circle around the motor housing 12, and a gap is provided between the heat sinks 134 and the opening 121 of the motor housing 12, so that the airflow can blow onto the heat sinks 134 and then flow to the motor housing 12 to further achieve the cooling effect. Specifically, a sealing groove 127 is provided on the outer side of the opening 121 of the motor housing 12. The sealing groove 127 is used to place a sealing ring so that when the motor housing 12 is connected to the opening cover 13, the sealing ring inside the sealing groove 127 can press against the surface of the opening cover 13 facing the motor housing 12, thereby achieving a seal on the internal motor assembly 11.

[0068] In some embodiments, refer to Figure 9 The motor assembly 11's shaft 113 is movably connected to the open cover 13 and the motor housing 12 via bearings. The open cover 13 is provided with an upper bearing chamber 135, in which an upper bearing 191 is fixed; the motor housing 12 is provided with a lower bearing chamber 128, in which a lower bearing 192 is fixed. The shaft 113 passes through the upper bearing 191 and the lower bearing 192, allowing the shaft 113 to rotate relative to the motor housing 12 via the bearings. Specifically, the upper bearing chamber 135 protrudes from the surface of the open cover 13 facing the motor housing 12 and is located at the geometric center of the open cover 13. The lower bearing chamber 128 protrudes from the bottom of the motor housing 12 toward the open 121 and is located between the shaft through hole 124 and the stator 111, allowing the shaft 113 to pass through the lower bearing 192 into the shaft through hole 124 and protrude from the shaft through hole 124 out of the motor housing 12.

[0069] Specifically, the upper bearing chamber 135 is provided with a sealing ring, which is pressed between the upper bearing chamber 135 and the upper bearing 191, so that the motor assembly 11 can be sealed in the cavity formed by the open cover 13 and the motor housing 12.

[0070] In some embodiments, refer to Figure 2 , Figures 9 to 11The motor housing 12 has a step 1221 on its sidewall 122. The outer edge 1221b of the step 1221 extends through the sidewall 122 to the opening 121, and the inner edge 1221a of the step 1221 extends through the sidewall 122 to the bottom. The outer edge 1221b of the step 1221 corresponds to the outer diameter of the sleeve 171 of the fixed impeller 17, which is set to a first radius R1. The inner diameter of the sleeve 171 of the fixed impeller 17, which corresponds to the inner edge 1221a of the step 1221, is set to a second radius R2. The bottom of the motor housing 12 has a third limiting groove 125. The sleeve 171 of the fixed impeller 17 is sleeved onto the motor housing 12 from the bottom until one end of the sleeve 171 of the fixed impeller 17 abuts against the step 1221. Relative to the end that abuts against the surface of step 1221, the other end of the fixed impeller 17 is provided with a first limiting protrusion 1711, which protrudes from the inner wall of the sleeve 171 toward the rotating shaft 113. When the sleeve 171 of the fixed impeller 17 abuts against the surface of step 1221, the first limiting protrusion 1711 is engaged in the third limiting groove 125, thereby fixing the relative position of the fixed impeller 17 and the motor housing 12.

[0071] Among them, reference Figure 2 and Figures 9 to 11 The inner diameter of the sleeve 171 of the fixed impeller 17 is set to a second radius R2, and the outer diameter of the sleeve 171 is set to a first radius R1. The inner edge 1221a of the step 1221 is set to a second radius R2, and the outer edge 1221b of the step 1221 is set to a first radius R1. When the sleeve 171 of the fixed impeller 17 is fitted onto the motor housing 12, the step 1221 engages with the sleeve 171 of the fixed impeller 17, so that when the side wall 122 of the motor housing 12 extends from the opening 121 to the outer edge 1221b of the step 1221, the connection point with the outer wall 172 of the sleeve 171 remains flat, thereby reducing the resistance of airflow passing through the fixed impeller 17. Furthermore, the inner edge 1221a of the step 1221 and the inner diameter of the sleeve 171 are both set to a second radius R2, allowing the sleeve 171 of the fixed impeller 17 to fit tightly against the motor housing 12, ensuring a stable connection. Figure 11 This is a schematic diagram showing the combined state of the fixed impeller 17 and the motor housing 12. With the sleeve 171 of the fixed impeller 17 abutting against the surface of the step 1221, the first limiting protrusion 1711 is engaged in the third limiting groove 125. At this time, the sleeve 171 of the fixed impeller 17 is positioned between the opening 121 and the bottom of the motor housing 12 in the direction of the rotation axis of the rotating shaft 113. This ensures that the sleeve 171 of the fixed impeller 17 will not extend beyond the bottom of the motor housing 12 when assembled, thereby ensuring that the fixed impeller 17 will not encroach on the axial space of the motor body and ensuring the miniaturization of the motor. Specifically, the outer diameter of the sleeve 171 can also be slightly larger than the first radius R1.

[0072] The fixed impeller 17 is provided with an outer wall 172, which is fixedly connected to the sleeve 171 by a guide plate 173. The guide plate 173 is configured as a spiral inclined surface that is evenly arranged between the inner side of the outer wall 172 and the outer side of the sleeve 171, providing support for the outer wall 172 while guiding the airflow direction. It can be understood that the length of the outer wall 172 along the rotation axis of the rotating shaft 113 should be greater than the length of the sleeve 171, so that the airflow at the sleeve 171 guiding the fixed impeller 17 is blocked by the outer wall 172, and then the airflow is guided out of the fixed impeller 17 by the guide plate 173 provided between the outer wall 172 and the sleeve 171 support.

[0073] In some embodiments, refer to Figure 12 and Figure 13 The motor also includes a guide vane 18. The guide vane 18 covers the motor housing 12 and partially covers the impeller 17. The guide vane 18 includes a main body 181 and guide vanes 182. The upper surface of the main body 181 covers the motor housing 12. The outer diameter of the main body 181 is set to a first radius R1, and the inner diameter of the main body 181 is set to a second radius R2. This allows the motor housing 12 to extend from the opening 121 to the outer edge 1221b of the step 1221, smoothly transitioning to the sleeve 171 of the impeller 17. The connection between the sleeve 181 and the impeller 17 remains smooth, extending through the side wall 122 of the sleeve 171 to the outer periphery of the impeller 17, thereby further reducing airflow resistance. The guide vanes 182 extend from the main body 181 toward the outer wall 172 of the impeller 17 until they abut against the inner side of the outer wall 172 of the impeller 17. The airflow can flow through the guide vane 18 and the outer wall 172 of the fixed impeller 17 to the guide plate 173, thereby forming a gas channel and guiding the direction of the airflow.

[0074] As shown in the figure, when the guide vane 18 covers the bottom of the motor housing 12, it can simultaneously press against the end face of the fixed impeller 17 and against the first limiting protrusion 1711 of the fixed impeller 17. Thus, the guide vane 18 is fixed to the motor housing 12 by screws, while the fixed impeller 17 is clamped between the guide vane 18 and the motor housing 12. It can be understood that the outer wall 172 of the fixed impeller 17 extends a portion of its length in the direction of the guide vane 18, the extension length being equal to the thickness of the guide vane 18, allowing the guide vanes 182 of the guide vane 18 to abut against the outer wall 172 of the fixed impeller 17, thereby forming a complete gas channel.

[0075] In some embodiments, refer to Figure 12 and Figure 13The motor housing 12 is provided with a sealing ring 126, which is used to ensure the sealing of the motor assembly 11 at the rotating shaft 113, thereby enclosing the motor assembly 11 in a sealed environment. The sealing ring 126 is provided on the outer surface of the motor housing 12, extending from the motor housing 12 away from the opening. The sealing ring 126 surrounds the rotating shaft through hole 124, so that the rotating shaft 113 extends out of the rotating shaft through hole 124 and is sealed by the medium inside the sealing ring 126. At the same time, the extended and protruding sealing ring 126 can provide positioning for the guide wheel 18. Specifically, the outer diameter of the sealing ring 126 is the same as the inner diameter of the guide wheel 18. A second limiting protrusion 1261 is provided on the side wall 122 of the sealing ring 126 perpendicular to the bottom of the motor housing 12, and a fourth limiting groove 1811 is provided on the inner wall of the guide wheel 18 corresponding to the second limiting protrusion 1261. The inner wall of the guide wheel 18 is fitted onto the sealing ring 126, while the fourth limiting groove 1811 is engaged with the second limiting protrusion 1261, thereby fixing the relative position of the guide wheel 18 and the motor housing 12. This makes the screw opening on the guide wheel 18 correspond to the nut opening on the motor housing 12, thus fixing the guide wheel 18 and the fixed impeller 17.

[0076] Specifically, the sealing ring 126 can be sealed using oil seals, sealant, sealing rings, or other methods without specific restrictions.

[0077] In some embodiments, refer to Figure 2 and Figure 14 The motor is also equipped with a moving impeller 20, which moves along... Figure 14 The impeller 20 is fixedly connected to the rotating shaft 113 in the direction of the dashed line. The moving impeller 20 is located at the end of the rotating shaft 113 away from the motor housing 12, and rotates in response to the rotation of the rotating shaft 113, thereby creating a low-pressure environment and achieving the function of air intake. The blades of the moving impeller 20 are arranged radially in a spiral pattern, thereby generating radial airflow, and further guiding the gas radially along the rotating shaft 113 along the arrangement direction of the moving impeller 20 to the guide vane 18, and then through the fixed impeller 17 to the heat sink 134. It is understood that a locking groove is provided at the position where the moving impeller 20 is connected to the rotating shaft 113, thereby fixing the moving impeller 20 to one end of the rotating shaft 113 to prevent relative sliding between the moving impeller 20 and the rotating shaft 113.

[0078] In some embodiments, the motor is further provided with a fan shroud 21. The fan shroud 21 is detachably snapped onto the outer wall 172 of the fixed impeller 17 via a connecting portion. The fan shroud 21 covers the outside of the moving impeller 20 and, together with the fixed impeller 17 and the bottom of the motor housing 12, forms a space encompassing the moving impeller 20. In response to the low pressure generated by the moving impeller 20, gas flows to the cavity formed by the fixed impeller 17, the fan shroud 21, and the bottom of the motor housing 12 to form an airflow into the motor, and then flows through the guide vane 18 and the fixed impeller 17 through the motor.

[0079] In some embodiments, the motor is applied to a vacuum cleaner, thus constituting a vacuum cleaner motor. Specifically, the motor can be installed in the vacuum cleaner, converting electrical energy into wind energy to provide the suction airflow required by the vacuum cleaner, thereby enabling the vacuum cleaner to perform its suction function. It is understood that the motor provided in this application can provide rotational kinetic energy, and in conjunction with the impeller provided by the motor, converts the kinetic energy into wind energy, thereby providing a negative pressure environment, and thus providing the driving energy required for cleaning equipment such as vacuum cleaners and floor scrubbers.

[0080] It is understandable that the stator 111 is wound with windings to enable the normal operation of the motor. The winding method of the motor windings has been described in the prior art and will not be repeated here.

[0081] It should be noted that, without conflict, all of the above technical features can be freely combined, and such free combination, simple variations, changes and modifications are all within the protection scope of this patent.

[0082] All the technical features of the above components can be freely combined without conflict, and such free combination or simple variations, changes and modifications are all within the protection scope of this patent.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "yet another embodiment," "another embodiment," "other embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0084] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of this application.

Claims

1. An electric machine characterized in that, include: A motor assembly, the motor assembly including a rotor and a stator; the rotor including a shaft; The motor housing has an opening at one end, and extends integrally downward from the opening through the circumferential sidewall of the motor housing to the bottom to accommodate the motor assembly; the bottom of the motor housing has a shaft through hole, and the shaft passes through the shaft through hole. An opening cover is provided over the opening of the motor housing; Circuit board and end cap; the end cap is disposed on the surface of the open cover opposite to the motor housing; the end cap and the open cover are connected to form a space for enclosing the circuit board; wherein One of the open cap and the end cap is provided with a first limiting post and a second limiting post, and the other of the open cap and the end cap is provided with a first limiting groove that cooperates with the first limiting post and a second limiting groove that cooperates with the second limiting post; the first limiting groove and the second limiting groove are located on the side of the end cap facing the open cap; the first limiting post and the second limiting post have different shapes, so that the assembly position of the open cap and the end cap is unique.

2. The motor according to claim 1, characterized in that, The first limiting post is configured to be inserted into the first limiting groove, such that the outer surface of the first limiting post is in contact with the inner surface of the first limiting groove; and the second limiting post is configured to be inserted into the second limiting groove, such that the outer surface of the second limiting post is in contact with the inner surface of the second limiting groove; wherein The outer surface contour of the first limiting post is set to be different from or not similar to the inner surface contour of the second limiting groove, so that the first limiting post cannot be inserted into the second limiting groove, or the first limiting post cannot be fixedly inserted into the second limiting groove; and the outer surface contour of the second limiting post is set to be different from or not similar to the inner surface contour of the first limiting groove, so that the second limiting post cannot be inserted into the first limiting groove, or the second limiting post cannot be fixedly inserted into the first limiting groove.

3. The motor according to claim 1, characterized in that, The open cover is provided with a first limiting post and a second limiting post; the first limiting post and the second limiting post are disposed toward the end cover; the first limiting post and the second limiting post are disposed on the outer periphery of the open cover and are disposed opposite to each other along the radial direction of the open cover.

4. The motor according to claim 3, characterized in that, The end cap is provided with a first limiting groove and a second limiting groove; the first limiting groove and the second limiting groove are disposed toward the open cap; the first limiting groove and the second limiting groove are disposed on the outer periphery of the end cap and are disposed opposite to each other along the radial direction of the end cap.

5. The motor according to claim 1, characterized in that, The open cover is provided with a first limiting groove and a second limiting groove; the first limiting groove and the second limiting groove are disposed toward the end cover; the first limiting groove and the second limiting groove are disposed on the outer periphery of the open cover and are disposed opposite to each other along the radial direction of the open cover.

6. The motor according to claim 5, characterized in that, The end cap is provided with a first limiting post and a second limiting post; the first limiting post and the second limiting post are disposed toward the open cap; the first limiting post and the second limiting post are disposed on the outer periphery of the end cap and are disposed opposite to each other along the radial direction of the end cap.

7. The motor according to claim 1, characterized in that, The open cover has a protruding plate extending from one side surface facing the motor housing. A portion of the protruding plate is arranged around the outer periphery of the stator, and another portion of the protruding plate abuts against the stator. The open cover is used to cooperate with the motor housing to enclose and fix the motor assembly.

8. The motor according to claim 1, characterized in that, include: A fixing bracket is clamped at both ends of the stator; a fixing through hole is provided on the open cover, and the fixing bracket extends from the fixing through hole and protrudes from the open cover; wherein... The circuit board is provided with a limiting hole, and the circuit board is sleeved on the fixing bracket through the limiting hole so that the circuit board is fixed in a horizontal position relative to the open cover by the fixing bracket.

9. The motor according to any one of claims 1 to 8, characterized in that, The end cap is provided with a terminal through hole and a power through hole; the circuit board is provided with a terminal and a power interface; when the first limiting post is connected to the first limiting groove, and when the second limiting post is connected to the second limiting groove, the terminal is exposed in the terminal through hole, and the power interface is exposed in the power through hole.

10. The motor according to claim 1, characterized in that, A heat sink is vertically arranged on the side of the open cover facing the motor housing, and the heat sink is evenly arranged along the outer periphery of the open cover; the heat sink is arranged around the outer periphery of the open and surrounds the open; the heat sink is provided with a gap between the heat sink and the open in the radial direction of the rotating shaft.

11. The motor according to claim 1, characterized in that, The motor also includes an upper bearing and a lower bearing; wherein, the side of the open cover facing the motor housing is recessed in a direction away from the motor housing to form an upper bearing chamber; and a lower bearing chamber is provided at the shaft through hole of the motor housing; The upper bearing is disposed in the upper bearing chamber, and the upper bearing is sleeved on the rotating shaft and disposed between the rotor and the open cover; The lower bearing is disposed in the lower bearing chamber, and the lower bearing is sleeved on the rotating shaft and disposed between the rotor and the motor housing.

12. The motor according to claim 1, characterized in that, The circumferential sidewall of the motor housing is provided with a step, the inner edge of the step surface is set as a second radius, and the outer edge of the step surface is set as a first radius; a third limiting groove is provided at the connection point where the sidewall extends to the bottom; the motor also includes: A fixed impeller, comprising a sleeve and an outer wall; a guide plate is connected between the sleeve and the outer wall; the sleeve of the fixed impeller is provided with a first limiting protrusion in cooperation with the third limiting groove, the first limiting protrusion being formed by the inner wall of the sleeve protruding towards the direction of the rotating shaft.

13. The motor according to claim 12, characterized in that, The inner diameter of the sleeve is set to a second radius, and the outer diameter of the sleeve is set to be greater than or equal to a first radius; with the first limiting protrusion engaged in the third limiting groove, the sleeve of the fixed impeller abuts upward against the step; and the sleeve of the fixed impeller is positioned between the opening of the motor housing and the bottom of the motor housing in a direction parallel to the rotating shaft.

14. The motor according to claim 12 or 13, characterized in that, The motor also includes: A guide vane; the guide vane includes a main body and guide vanes; the upper surface of the main body covers the bottom of the motor housing, the outer diameter of the main body is set to a first radius, and the inner diameter of the main body is set to be smaller than a second radius; The main body is installed on the bottom of the motor housing; the main body is fixedly connected to the motor housing to clamp and fix the fixed impeller; the main body extends to the outer wall of the fixed impeller to form the guide vane, the guide vane abuts against the outer wall of the fixed impeller, and works with the guide plate to form a gas channel.

15. The motor according to claim 14, characterized in that, A sealing ring is provided at the bottom of the motor housing, protruding away from the opening. The sealing ring is provided with a second limiting protrusion. A fourth limiting groove is provided on the inner side of the main body of the wind guide wheel. The inner side of the main body is fitted onto the sealing ring so that the second limiting protrusion is located in the fourth limiting groove, thereby fixing the relative position of the main body with respect to the motor housing.

16. The motor according to any one of claims 12 to 15, characterized in that, The motor also includes: A moving impeller; the moving impeller is fixedly connected to the rotating shaft, and the moving impeller is located on the side of the fixed impeller away from the motor housing; the moving impeller generates low pressure in response to the rotation of the rotating shaft, so that gas flows from the moving impeller to the fixed impeller.

17. The motor according to claim 16, characterized in that, The motor also includes a fan shroud; the fan shroud is detachably connected to the outer wall of the fixed impeller; the fan shroud is connected to the outer wall of the fixed impeller to enclose the moving impeller.

18. The motor according to any one of claims 1 to 17, characterized in that, The motor is used in a vacuum cleaner, thus constituting a vacuum cleaner motor.

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