Electric motor

Abstract

The utility model discloses an electric motor, which comprises a frame assembly, a stator assembly and a rotor assembly, the frame assembly comprises a shell and at least one bearing bracket, the shell is provided with an inner wall and an outer wall, the inner wall defines a mounting channel, an annular channel is defined between the inner wall and the outer wall, diffuser blades are arranged in the annular channel, and the bearing bracket is arranged on the outer wall of the shell. The bearing frame is connected to the end part of the shell; the stator assembly is arranged in the mounting channel, the stator assembly comprises a stator shell and a coil assembly, and a mounting hole is defined by the stator assembly; the rotor assembly comprises a magnet, a bearing, an impeller and a rotating shaft, the rotor assembly is at least partially inserted into the mounting hole, and the bearing is inserted into the mounting groove of the bearing frame. Through the arrangement of the structure, the bearing of the rotor assembly is inserted into the mounting groove of the bearing frame, so that the rotor assembly and the shell can be connected through the bearing frame, product connection is more stable, the shell and the bearing frame are arranged separately, the production difficulty can be reduced, the production efficiency can be improved, and the product yield can be improved.

Description

Technical Field

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

[0002] An electric motor is a device that converts electrical energy into mechanical energy, which has a very wide range of applications in people's daily lives. From large vehicles and airplanes to small toys and handheld small household appliances, electric motors are used as the power source. In handheld products such as electric toothbrushes and hair dryers, generally, a miniaturized and highly stable electric motor is required.

[0003] Currently, in order to miniaturize the product, the existing electric motors on the market usually directly set the bearings in the housing. Therefore, a bearing installation structure needs to be set at the housing, which increases the processing difficulty of the product, reduces the production efficiency of the product, and is very likely to produce defective products, bringing trouble to the production of the product. Moreover, the product assembly is more troublesome, the product structure is complex and the stability is low.

[0004] Therefore, the utility model provides an electric motor, which can effectively solve the above problems, and has a simple structure, is convenient for production and assembly, and the product structure is stable. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides an electric motor with a simple structure, which is convenient for production and assembly, and the product structure is stable.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] An electric motor, comprising:

[0008] A frame assembly, the frame assembly includes a housing and at least one bearing bracket. The housing has an inner wall and an outer wall. The inner wall defines an installation channel, and an annular channel is defined between the inner wall and the outer wall. Diffuser vanes are provided in the annular channel. The bearing bracket is connected to the end of the housing.

[0009] A stator assembly, the stator assembly is arranged in the installation channel. The stator assembly includes a stator housing and a coil group. The stator assembly defines an installation hole.

[0010] A rotor assembly, the rotor assembly includes a magnet, a bearing, an impeller and a rotating shaft. At least part of the rotor assembly is inserted into the installation hole, and the bearing is inserted into the installation groove of the bearing bracket.

[0011] As an improvement of the utility model, the bearing bracket is provided with a connecting portion and an inserting portion. The installation groove is arranged in the inserting portion. The connecting portion extends outward along the edge of the inserting portion, and the connecting portion is connected to the end of the housing.

[0012] As an improvement of the present utility model, the connecting portion is provided with a through hole for the airflow to pass through.

[0013] As an improvement of the present utility model, it further includes a shock-absorbing sleeve sleeved on the bearing, with the inner surface of the shock-absorbing sleeve fitting on the outer surface of the bearing and the outer surface of the shock-absorbing sleeve fitting on the inner wall of the installation groove.

[0014] As an improvement of the present utility model, the insertion portion is provided with a shaft hole, the output end of the rotating shaft passes out along the shaft hole, and the impeller is connected to the output end of the rotating shaft.

[0015] As an improvement of the present utility model, an installation block protrudes inwardly from the lower part of the inner wall of the housing. The installation block is provided with a first connection hole, and the bearing bracket is provided with a second connection hole. The first connection hole and the second connection hole are used for a threaded connector to be inserted and connected, so that the bearing bracket is connected to the housing.

[0016] As an improvement of the present utility model, the stator housing is further provided with a connection through hole. The threaded portion of the threaded connector passes through the second connection hole and the connection through hole and is threadedly connected to the first connection hole. The lower surface of the upper bearing bracket abuts against the upper surface of the stator housing, and the lower surface of the stator housing abuts against the installation block.

[0017] As an improvement of the present utility model, a first installation step is provided at the edge of the housing, and a second installation step is provided at the edge of the bearing bracket. The first installation step abuts against the second installation step.

[0018] As an improvement of the present utility model, it further includes a PCB board which is connected to the upper surface of the bearing bracket and electrically connected to the coil group.

[0019] As an improvement of the present utility model, the rotor assembly further includes two shaft sleeves. The magnet is sleeved on the rotating shaft, and the two shaft sleeves are sleeved on the rotating shaft and respectively abut against both ends of the magnet.

[0020] As an improvement of the present utility model, it further includes a plurality of electrical connection pins. The upper surface of the stator housing is provided with a plurality of electrical contacts electrically connected to the coil group. The lower ends of the electrical connection pins are electrically connected to the electrical contacts, and the upper ends of the electrical connection pins are electrically connected to the PCB board.

[0021] As an improvement of the present utility model, it further includes a shock-absorbing housing sleeved on the outer surface of the housing.

[0022] As an improvement of the present utility model, the shock-absorbing housing is made of silica gel material, and the surface of the shock-absorbing housing is provided with protruding abutting portions.

[0023] As an improvement of the present utility model, the outer wall extends axially beyond the inner wall in at least one of the upstream and downstream directions.

[0024] As an improvement of the present utility model, the impeller includes an impeller body and blades, and the blades extend uniformly outward along the surface of the impeller body.

[0025] As an improvement of the present utility model, the blades are located in the space enclosed by the outer wall.

[0026] As an improvement of the present utility model, the diameter of the circle where the outer surface of the blade is located matches the diameter of the inner surface of the outer wall.

[0027] As an improvement of the present utility model, the shape of the blade is an Archimedean spiral surface.

[0028] As an improvement of the present utility model, the diffuser blades extend along the outer surface of the inner wall to the inner surface of the outer wall, and the diffuser blades are uniformly and spaced in the annular channel.

[0029] As an improvement of the present utility model, the outer wall is provided with an electrostatic connection block for electrically connecting to a conductive component to eliminate static electricity.

[0030] The beneficial effects of the present utility model are as follows: Through the setting of the above structure, the stator assembly is inserted into the installation channel, and then the rotor assembly is inserted into the installation hole, so that the stator assembly and the rotor assembly are coaxially arranged. Moreover, the bearing bracket is connected to the housing, and the bearings of the rotor assembly are inserted into the installation grooves of the bearing bracket, so that the bearing bracket can connect the rotor assembly and the housing, making the product connection more stable. In addition, by separately setting the housing and the bearing bracket, the production difficulty can be reduced, the production efficiency can be improved, and the product yield can be increased. When in use, an alternating current is provided to the coil group to generate a periodically changing magnetic field. The magnetic field generated by the coil group interacts with the magnetic field of the magnet to drive the magnet, the rotating shaft, and the impeller to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. The following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0033] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present utility model from an angle;

[0034] Figure 2 is a schematic view of the overall structure from another angle of the first embodiment of the present utility model;

[0035] Figure 3 is an exploded view of the first embodiment of the present utility model from one angle;

[0036] Figure 4 is an exploded view of the first embodiment of the present utility model from another angle;

[0037] Figure 5 is a sectional view of the first embodiment of the present utility model;

[0038] Figure 6 is Figure 5 an enlarged view of the area at circle A;

[0039] Figure 7 is a schematic view of the overall structure of the housing of the first embodiment of the present utility model;

[0040] Figure 8 is a schematic view of the overall structure of the bearing bracket of the first embodiment of the present utility model;

[0041] Figure 9 is an exploded view of the second embodiment of the present utility model from one angle;

[0042] Figure 10 is an exploded view of the second embodiment of the present utility model from another angle. Detailed Embodiments

[0043] Referring to Figures 1 to 10 , an electric motor includes:

[0044] A frame assembly 100, the frame assembly 100 includes a housing 110 and at least one bearing bracket 120, the housing 110 has an inner wall 111 and an outer wall 112, the inner wall 111 defines an installation channel 101, and an annular channel 102 is defined between the inner wall 111 and the outer wall 112, a diffuser vane 113 is provided in the annular channel 102, and the bearing bracket 120 is connected to the end of the housing 110;

[0045] A stator assembly 200, the stator assembly 200 is disposed in the installation channel 101, the stator assembly 200 includes a stator housing 210 and a coil group 220, and the stator assembly 200 defines an installation hole 201;

[0046] The rotor assembly 300, the rotor assembly 300 includes a magnet 310, a bearing 320, an impeller 330 and a rotating shaft 340. The rotor assembly 300 is at least partially inserted into the mounting hole 201, and the bearing 320 is inserted into the mounting groove 121 of the bearing bracket 120.

[0047] With the above structure, the stator assembly 200 is inserted into the installation channel 101, and then the rotor assembly 300 is inserted into the mounting hole 201, so that the stator assembly 200 and the rotor assembly 300 are coaxially arranged. Moreover, the bearing bracket 120 is connected to the housing 110, and the bearing 320 of the rotor assembly 300 is inserted into the mounting groove 121 of the bearing bracket 120, so that the bearing bracket 120 can connect the rotor assembly 300 and the housing 110, making the product connection more stable. And by separately arranging the housing 110 and the bearing bracket 120, the production difficulty can be reduced, the production efficiency can be improved, and the yield of the product can be increased. When in use, an alternating current is provided to the coil group 220 to generate a periodically changing magnetic field. The magnetic field generated by the coil group 220 interacts with the magnetic field of the magnet 310 to drive the magnet 310, the rotating shaft 340 and the impeller 330 to rotate.

[0048] In this embodiment, the bearing bracket 120 is provided with a connecting portion 122 and an inserting portion 123. The mounting groove 121 is arranged on the inserting portion 123. The connecting portion 122 extends outward along the edge of the inserting portion 123, and the connecting portion 122 is connected to the end of the housing 110. With the above structure, the connecting portion 122 of the bearing bracket 120 is connected to the end of the housing 110, which can fix the bearing bracket 120 and the housing 110, improving the stability of the product. And the mounting groove 121 provided on the inserting portion 123 allows the bearing 320 to be installed to connect the rotor assembly 300 and the bearing bracket 120.

[0049] In this embodiment, the connecting portion 122 is provided with a through hole 124 for the airflow to pass through. With the above structure, when in use, the impeller 330 rotates to generate an airflow, and the airflow can pass through the through hole 124, flow through the rotor assembly 300 and the stator assembly 200, which can effectively take away the heat generated during operation, reduce the temperature of the rotor assembly 300 and the stator assembly 200, and improve the service life and use safety of the product.

[0050] In this embodiment, a shock-absorbing sleeve 400 is further included. The shock-absorbing sleeve 400 is sleeved on the bearing 320. The inner surface of the shock-absorbing sleeve 400 is attached to the outer surface of the bearing 320, and the outer surface of the shock-absorbing sleeve 400 is attached to the inner wall of the installation groove 121. Through the setting of the above structure, during use, the shock-absorbing sleeve 400 is arranged between the bearing 320 and the installation groove 121, which can effectively provide buffering. When the rotating shaft 340 rotates relative to the bearing 320, the collision between the bearing 320 and the installation groove 121 can be slowed down, the service life of each component can be improved, and the noise can be reduced, providing a good user experience.

[0051] In this embodiment, the insertion part 123 is provided with a shaft hole 125. The output end of the rotating shaft 340 passes out along the shaft hole 125, and the impeller 330 is connected to the output end of the rotating shaft 340. Through the setting of the above structure, the output end of the rotating shaft 340 passes out along the shaft hole 125 and is connected to the impeller 330. When the rotating shaft 340 rotates, it drives the impeller 330 to rotate, thereby generating air flow. The impeller 330 is located below the bearing 320 and the bearing bracket 120, which can not only maintain the structural stability but also facilitate the installation.

[0052] In this embodiment, a mounting block 114 is formed by the inward protrusion of the lower part of the inner wall 111 of the housing 110. The mounting block 114 is provided with a first connection hole 103, and the bearing bracket 120 is provided with a second connection hole 126. The first connection hole 103 and the second connection hole 126 are used for inserting and connecting a threaded connector 500, so that the bearing bracket 120 is connected to the housing 110. Through the setting of the above structure, during use, the threaded connector 500 is inserted through the second connection hole 126 on the upper bearing bracket 120, then passes through the first connection hole 103, and is then threadedly connected to the second connection hole 126 on the lower bearing bracket 120, so as to realize the connection between the upper and lower bearing brackets 120 and the housing 110, and the connection is convenient and stable.

[0053] In this embodiment, the stator housing 210 is further provided with a connection through hole 212. The threaded part of the threaded connector 500 passes through the second connection hole 126 and the connection through hole 212 and is threadedly connected to the first connection hole 103. The lower surface of the upper bearing bracket 120 abuts against the upper surface of the stator housing 210, and the lower surface of the stator housing 210 abuts against the mounting block 114. Through the setting of the above structure, during use, the threaded connector 500 is inserted through the second connection hole 126 on the upper bearing bracket 120, then passes through the connection through hole 212 and the first connection hole 103, and is then threadedly connected to the second connection hole 126 on the lower bearing bracket 120, so as to realize the connection between the upper and lower bearing brackets 120, the stator housing 210 and the housing 110. The connection is convenient and stable, and multiple components are connected together, making the product structure more stable and firm.

[0054] In this embodiment, a first mounting step 115 is provided at the edge of the housing 110, and a second mounting step 127 is provided at the edge of the bearing bracket 120. The first mounting step 115 abuts against the second mounting step 127. With the above structure, during use, the protruding part of the first mounting step 115 abuts against the recessed part of the second mounting step 127, and the recessed part of the first mounting step 115 abuts against the protruding part of the second mounting step 127, so as to position the housing 110 and the bearing bracket 120, align the bearing bracket 120 with the housing 110, facilitate the installation of the bearing bracket 120, and at the same time, it can also limit the radial movement of the bearing bracket 120 and improve the stability of the product.

[0055] In this embodiment, it further includes a PCB board 600. The PCB board 600 is connected to the upper surface of the bearing bracket 120 and is electrically connected to the coil group 220. With the above structure, the PCB board 600 can be stably connected to the upper surface of the upper bearing bracket 120, facilitating the user to install the PCB board 600 and improving the stability of the product. Moreover, the PCB board 600 is electrically connected to each coil group 220, and the PCB board 600 can control the magnitude, direction, and period of the current in each coil group 220, etc., so as to adjust the rotation speed of the motor.

[0056] In this embodiment, the rotor assembly 300 further includes two shaft sleeves 350. The magnet 310 is sleeved on the rotating shaft 340, and the two shaft sleeves 350 are sleeved on the rotating shaft 340 and respectively abut against both ends of the magnet 310. With the above structure, during use, the magnet 310 is sleeved on the rotating shaft 340, which can realize the preliminary connection between the magnet 310 and the rotating shaft 340. Then, the two shaft sleeves 350 are respectively connected to both ends of the magnet 310 to limit the magnet 310 and prevent the axial movement of the magnet 310, improving the stability of the product.

[0057] In this embodiment, it further includes a plurality of electrical connection pins 700. A plurality of electrical contacts 211 electrically connected to the coil group 220 are provided on the upper surface of the stator housing 210. The lower end of the electrical connection pin 700 is electrically connected to the electrical contact 211, and the upper end of the electrical connection pin 700 is electrically connected to the PCB board 600. With the above structure, during use, both ends of the electrical connection pin 700 are respectively connected to the PCB board 600 and the electrical contact 211 on the coil group 220, and the electrical connection pin 700 passes through along the edge of the upper bearing bracket 120, realizing the electrical connection between the PCB board 600 and each coil group 220, so that the PCB board 600 can respectively control the magnitude, direction, and period of the current in each coil group 220, etc., so as to adjust the rotation speed of the motor.

[0058] In this embodiment, a shock-absorbing housing 800 is further included, and the shock-absorbing housing 800 is sleeved on the outer surface of the housing 110. Through the above structural arrangement, by sleeving the shock-absorbing housing 800 on the outer surface of the housing 110, buffering can be provided, so that there is a flexible buffer component between the outer surface of the housing 110 and the motor installation location, reducing vibration and noise, and improving the user experience.

[0059] In this embodiment, the shock-absorbing housing 800 is made of silica gel, and the surface of the shock-absorbing housing 800 is provided with protruding abutting portions 810. Through the above structural arrangement, the shock-absorbing housing 800 made of silica gel is both inexpensive and durable, and can effectively provide buffering, with a long service life of the product; at the same time, several protruding abutting portions 810 on the surface of the shock-absorbing housing 800 can abut against the motor installation location, increasing the deformation space of the product, further providing buffering; at the same time, it can also increase the friction force, making the connection of the motor more stable.

[0060] In this embodiment, the outer wall 112 extends axially beyond the inner wall 111 in at least one of the upstream and downstream directions. Through the above structural arrangement, the outer wall 112 extends upward or downward axially beyond the inner wall 111, forming a receiving cavity that can accommodate the bearing bracket 12, the bearing 320, and at least part of the impeller 330, effectively preventing dust and other impurities from entering the bearing 320 and improving the service life of the product.

[0061] In this embodiment, the impeller 330 includes an impeller main body 331 and blades 332, and the blades 332 extend uniformly outward along the surface of the impeller main body 331. Through the above structural arrangement, the impeller main body 331 is connected to the output end of the rotating shaft 340. When the rotating shaft 340 rotates, the impeller main body 331 rotates with the rotating shaft 340, and then drives the blades 332 to rotate to generate air flow.

[0062] In this embodiment, the blades 332 are located within the space enclosed by the outer wall 112. Through the above structural arrangement, by arranging the blades 332 within the space enclosed by the outer wall 112, the blades 332 can be effectively protected, preventing the blades 332 from contacting dust, other components, etc. when rotating, preventing the blades 332 from being damaged, and improving the service life of the product; at the same time, it can also make the rotation of the blades 332 smoother, preventing the blades 332 from scratching the user or other components when rotating, and improving the safety of the product.

[0063] In this embodiment, the diameter of the circle where the outer surface of the blade 332 is located matches the diameter of the inner surface of the outer wall 112. Through the above structural arrangement, the diameter of the circle where the outer surface of the blade 332 is located matches the diameter of the inner surface of the outer wall 112, enabling the blades 332 to be arranged within the space enclosed by the outer wall and making the rotation of the impeller 330 smoother.

[0064] In this embodiment, the shape of the blade 332 is an Archimedean spiral surface. Through the above structural arrangement, when the blade 332 with the Archimedean spiral surface shape rotates, it can more easily push the gas to flow and generate an air current. Moreover, the air current flows along the surface of the blade 332, and the energy loss is small, improving the energy utilization rate of the product.

[0065] In this embodiment, the diffuser blade 113 extends from the outer surface of the inner wall 111 to the inner surface of the outer wall 112, and the diffuser blades 113 are evenly and spacedly arranged in the annular channel 102. Through the above structural arrangement, an air current channel is formed between the spaced diffuser blades 113, allowing the air current to flow along the air current channel, so that the air current is evenly transmitted. Moreover, the air current will also flow through the area where the stator assembly 200 is located, taking away the heat generated by the operation of the stator assembly 200, reducing the temperature of the product during operation, and improving the use safety and service life of the product.

[0066] In this embodiment, the outer wall 112 is provided with an electrostatic connection block 116, and the electrostatic connection block 116 is used for electrically connecting to a conductive component to eliminate static electricity. Through the above structural arrangement, during use, the electrostatic connection block 116 is connected to the conductive component to transfer the charge at the motor and eliminate static electricity, preventing the influence of static electricity accumulation on the operation of the motor.

[0067] As described above, one or more implementation manners are provided in combination with specific contents, and it is not determined that the specific implementation of the present invention is only limited to these descriptions. Any method, structure, etc. similar or identical to the present invention, or several technical deductions or substitutions made on the premise of the concept of the present invention, should be regarded as the protection scope of the present invention.

Claims

1. An electric motor, characterized in that: include: A frame assembly (100), the frame assembly (100) comprising a housing (110) and at least one bearing frame (120), the housing (110) having an inner wall (111) and an outer wall (112), the inner wall (111) defining a mounting channel (101), an annular channel (102) defined between the inner wall (111) and the outer wall (112), a diffuser blade (113) being provided in the annular channel (102), and the bearing frame (120) being connected to an end of the housing (110); A stator assembly (200), the stator assembly (200) being arranged in the installation channel (101), the stator assembly (200) comprising a stator housing (210) and a coil assembly (220), and the stator assembly (200) defining a installation hole (201); A rotor assembly (300), the rotor assembly (300) comprising a magnet (310), a bearing (320), an impeller (330) and a rotating shaft (340), the rotor assembly (300) being at least partially inserted into the mounting hole (201), and the bearing (320) being inserted into the mounting groove (121) of the bearing frame (120).

2. The electric motor according to claim 1, characterized in that The bearing frame (120) is provided with a connecting portion (122) and an inserting portion (123), the mounting groove (121) is provided on the inserting portion (123), the connecting portion (122) extends outwardly along an edge of the inserting portion (123), and the connecting portion (122) is connected to an end of the housing (110).

3. The electric motor according to claim 2, characterized in that The connecting portion (122) is provided with a through hole (124), and the through hole (124) is used for airflow to pass through.

4. The electric motor according to claim 1, characterized in that It also includes a shock-absorbing sleeve (400), which is sleeved on the bearing (320), the inner surface of the shock-absorbing sleeve (400) is in contact with the outer surface of the bearing (320), and the outer surface of the shock-absorbing sleeve (400) is in contact with the inner wall of the installation groove (121).

5. The electric motor according to claim 2, characterized in that The insertion portion (123) is provided with an axial hole (125), the output end of the rotating shaft (340) passes through the axial hole (125), and the impeller (330) is connected to the output end of the rotating shaft (340).

6. The electric motor according to claim 1, characterized in that The lower part of the inner wall (111) of the shell (110) protrudes inward to form a mounting block (114), and the mounting block (114) is provided with a first connecting hole (103). The bearing frame (120) is provided with a second connecting hole (126). The first connecting hole (103) and the second connecting hole (126) are used for inserting and connecting a threaded connector (500) so that the bearing frame (120) is connected to the shell (110).

7. The electric motor according to claim 6, characterized in that The stator housing (210) is also provided with a connecting through hole (212); the threaded portion of the threaded connector (500) passes through the second connecting hole (126) and the connecting through hole (212) and is threadedly connected to the first connecting hole (103); the lower surface of the upper bearing frame (120) abuts against the upper surface of the stator housing (210); and the lower surface of the stator housing (210) abuts against the mounting block (114).

8. The electric motor according to claim 1, characterized in that A first mounting step (115) is provided on the edge of the housing (110), a second mounting step (127) is provided on the edge of the bearing frame (120), and the first mounting step (115) abuts against the second mounting step (127).

9. The electric motor according to claim 1, characterized in that It also includes a PCB board (600), wherein the PCB board (600) is connected to the upper surface of the upper bearing frame (120) and is electrically connected to the coil assembly (220).

10. The electric motor according to claim 1, characterized in that The rotor assembly (300) further comprises two shaft sleeves (350), the magnet (310) is sleeved on the rotating shaft (340), and the two shaft sleeves (350) are sleeved on the rotating shaft (340) and respectively abut against two ends of the magnet (310).

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