Motor with integrated double-bearing-seat structure

Abstract

The utility model discloses a motor with an integrated double-bearing seat structure, which comprises a rotor and a stator, and is characterized in that the rotor comprises a casing, a permanent magnet, a bearing and a rotating shaft; the stator comprises a stator iron core, a plastic middle cover and a stator winding, the middle cover is of an integrated structure, the middle of the middle cover is provided with a first annular protrusion, and a check ring is arranged in the first protrusion so that two bearing chambers located on the two sides of the check ring can be formed in the first protrusion; the two bearings are arranged in the corresponding bearing chambers; the rotating shaft penetrates through the inner rings of the two bearings, the middle cover provided with the two bearing chambers is arranged to be of an integrated structure, only the check ring is arranged between the two bearing chambers, the distance between the two bearing chambers can be shortened, one-time injection molding machining forming can be achieved, the assembly error caused by separate machining of the bearing chambers can be avoided, and the assembly efficiency is improved. And meanwhile, the concentricity of the bearing seats of the two bearings sleeving the periphery of the motor shaft can be ensured, so that the problems of large jumping, large vibration, high noise and the like of the motor shaft are avoided, and the service life of the motor is further prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a kind of motor with integrated double bearing seat structure. BACKGROUND

[0002] Please refer to Figure 1 In existing motor, front bearing chamber 01 is a part, rear bearing chamber 02 is a part, two parts are independently processed, bearing chamber needs to be machined, and is formed by assembly, front bearing chamber 01 is equipped with front bearing 03, rear bearing chamber 02 is equipped with rear bearing 04, the outer diameter of rotating shaft φD1, the outer diameter of front bearing φD2, the spacing L1 between front bearing 03 and rear bearing 04 is relatively large, L1>5 times D1, L1>2 times D2, there are machining errors and assembly errors, the concentricity of front bearing chamber 01 and rear bearing chamber 02 is difficult to guarantee consistent, in addition, cantilever is relatively long, motor shaft is large, vibration is large, noise is high, and it is easy to cause grinding bearing chamber, grinding shaft, bearing jam failure etc., leading to short service life of motor.

[0003] Therefore, how to guarantee the concentricity of the bearing seat of the two bearings sleeved on the outer periphery of the motor shaft to avoid the problems of large motor shaft jump, large vibration, high noise and the like, and to improve the service life of the motor, is a technical problem to be solved by the person skilled in the art at present. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of motor with integrated double bearing seat structure, the concentricity of the bearing seat of the two bearings sleeved on the outer periphery of the motor shaft can be guaranteed, to avoid the problems of large motor shaft jump, large vibration, high noise and the like, and to improve the service life of the motor.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of motor with integrated double bearing seat structure, comprising:

[0006] Middle cover is integrated structure, the middle part of middle cover is provided with the first protrusion in the form of circular ring, the first protrusion is provided with the check ring inside, so that the two bearing chambers located on both sides of the check ring are formed inside the first protrusion;

[0007] Two bearings are arranged in the corresponding bearing chamber;

[0008] Rotating shaft is arranged in the inner ring of the two bearings.

[0009] Preferably, it further includes a control panel mounted on one side of the middle cover, the control panel is provided with a limiting hole and a connecting piece;

[0010] The middle cover includes a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are located on both sides of the middle cover in the axial direction of the rotating shaft, the second mounting portion is provided with a limiting shaft and a mounting hole, the limiting shaft can be arranged in the corresponding limiting hole to position the control panel, and the mounting hole is used for connecting the connecting piece to fix the control panel.

[0011] Preferably, the stator assembly further comprises a stator core and a stator winding arranged on the stator core.

[0012] The first protrusion is provided with a mounting position for mounting the stator core and a protruding rib for limiting rotation of the stator core relative to the middle cover on the outer circumferential wall on one side of the first mounting portion.

[0013] Preferably, the housing further comprises an upper housing mounted on the first mounting portion to form a first accommodating cavity, and a first groove in a ring shape is arranged on the circumference of the upper housing, a first sealing ring is mounted in the first groove, and a first protruding ring adapted to the first groove is arranged on the circumference of the first mounting portion to abut and press the first sealing ring in the first groove.

[0014] Preferably, the housing further comprises a lower housing mounted on the second mounting portion to form a second accommodating cavity, the control board is arranged in the second accommodating cavity, a second groove in a ring shape is arranged on the circumference of the second mounting portion, a second sealing ring is mounted in the second groove, and the lower housing is provided with an abutting portion capable of abutting and pressing the second sealing ring.

[0015] Preferably, the housing further comprises a housing arranged in the first accommodating cavity, the housing comprises a first end sleeved on the outer circumference of the rotating shaft and a second end sleeved on the outer circumference of the stator assembly, a permanent magnet is mounted on the inner side of the second end, and a first gap exists between the permanent magnet and the outer circumference of the stator assembly.

[0016] Preferably, the middle cover is further provided with a plurality of wire passing holes, and the power supply wire is arranged in the corresponding wire passing hole to be connected to the corresponding stator winding.

[0017] Preferably, the second mounting portion is provided with a first reinforcing rib, a second reinforcing rib and a reinforcing convex, the first reinforcing rib extends along the radial direction of the second mounting portion, the second reinforcing rib is arranged in a ring shape on the circumference of the second mounting portion, and the reinforcing convex is adjacent to the wire passing hole.

[0018] Preferably, the retainer ring comprises a boss, the boss is arranged on the end face of the side of the retainer ring away from the control board, the bosses are uniformly arranged along the circumference of the retainer ring, and the distance of the retainer ring on the axis of the rotating shaft is less than one fourth of the outer diameter of the rotating shaft.

[0019] Preferably, the first mounting portion is provided with a first identification point for assembly alignment, and the second mounting portion is provided with a second identification point for assembly alignment.

[0020] With respect to the above background technology, the motor with an integrated double-bearing seat structure provided by the present application comprises a middle cover, bearings and a rotating shaft, the middle cover is an integrated structure, a first protrusion in a ring shape is arranged in the middle of the middle cover, a retainer ring is arranged in the first protrusion, so that two bearing chambers are formed inside the first protrusion on both sides of the retainer ring; two bearings are arranged in the corresponding bearing chambers; and the rotating shaft is arranged in the inner ring of the two bearings.

[0021] Specifically, the middle cover with two bearing chambers is designed as an integral structure, with only a retaining ring between the two bearing chambers. This reduces the distance between the two bearing chambers and allows for one-time injection molding, avoiding assembly errors caused by separate processing of the bearing chambers. At the same time, it ensures the concentricity of the bearing seats of the two bearings fitted around the outer circumference of the motor shaft, thus avoiding problems such as large motor shaft runout, large vibration, and high noise, thereby improving the service life of the motor. Attached Figure Description

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

[0023] Figure 1 This is a schematic diagram of the structure of a double bearing housing for an electric motor in the prior art;

[0024] Figure 2 This is a schematic diagram of the structure of the middle cover provided in an embodiment of the present utility model;

[0025] Figure 3 for Figure 2 The main view;

[0026] Figure 4 for Figure 3 Sectional view along the middle AA;

[0027] Figure 5 This is a structural schematic diagram of the middle cover from another perspective provided in an embodiment of the present utility model;

[0028] Figure 6 for Figure 5 The main view;

[0029] Figure 7 This is a schematic diagram of the structure of the middle cover and the rotating shaft combined according to an embodiment of the present utility model;

[0030] Figure 8 for Figure 7 The main view;

[0031] Figure 9 for Figure 8 A sectional view along the middle edge BB;

[0032] Figure 10 This is a schematic diagram of the structure of the motor provided in an embodiment of the present utility model.

[0033] Figure 11 forFigure 10 a sectional view along C-C;

[0034] Figure 12 A partial sectional view of the motor is provided in the embodiments of the utility model.

[0035] Among them:

[0036] 01-front bearing chamber, 02-back bearing chamber, 03-front bearing, 04-back bearing;

[0037] 100-middle cover, 110-first protrusion, 111-mounting position, 112-convex rib, 120-retaining ring, 121-boss, 130-bearing chamber, 140-first mounting part, 141-first convex ring, 142-first identification point, 143-second convex ring, 150-second mounting part, 151-limiting shaft, 152-mounting hole, 153-second groove, 154-second sealing ring, 155-first reinforcing rib, 156-second reinforcing rib, 157-reinforcing convex, 158-second identification point, 160-threading hole;

[0038] 200-bearing;

[0039] 300-rotating shaft, 310-clamp spring;

[0040] 400-control board;

[0041] 500-stator assembly;

[0042] 600-upper shell, 610-first sealing ring;

[0043] 700-lower shell;

[0044] 800-casing, 810-permanent magnet;

[0045] 900-fan head. DETAILED DESCRIPTION

[0046] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0047] In order to make those skilled in the art better understand the technical scheme of the utility model, the utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0048] In the description of the utility model, it is understood that the terms "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, constitute and operate in a specific orientation, and therefore cannot be understood as a limitation of the utility model.

[0049] The utility model discloses a motor with integrated double bearing seat structure can guarantee the concentricity of the bearing seat of the two bearings 200 that are sleeved on the periphery of the motor shaft, to avoid the problems of large motor shaft runout, large vibration, high noise and the like, and to improve the service life of the motor.

[0050] Please refer to Figure 4 And Figure 9 To achieve the above object, the utility model provides a motor with integrated double bearing seat structure, including middle cover 100, bearing 200 and rotating shaft 300.

[0051] The middle cover 100 is of integrated structure, and the middle part of the middle cover 100 is provided with a first protrusion 110 in the form of a circular ring, and a retainer 120 is arranged in the first protrusion 110, so that two bearing chambers 130 are formed inside the first protrusion 110 on both sides of the retainer 120.

[0052] The middle cover 100 can be formed by one-time injection molding, the two bearing chambers 130 can be divided into a first bearing chamber and a second bearing chamber, the first bearing chamber and part of the second bearing chamber are located on one side of the middle cover 100, and the remaining part of the second bearing chamber is located on the other side of the middle cover 100.

[0053] The two bearings 200 are arranged in the corresponding bearing chambers 130, and the two bearings 200 include a first bearing arranged in the first bearing chamber and a second bearing arranged in the second bearing chamber.

[0054] Please refer to Figure 7 The rotating shaft 300 is arranged in the inner ring of the two bearings 200, and the axial movement of the rotating shaft 300 can be limited by a snap spring 310 after one end of the rotating shaft 300 extends out of the second bearing 200.

[0055] The middle cover 100 provided with the two bearing chambers 130 is arranged in an integrated structure, and only the retainer 120 is arranged between the two bearing chambers 130, so that the distance between the two bearing chambers 130 can be reduced, and one-time injection molding can avoid assembly errors caused by separate processing of the bearing chambers 130, and can also guarantee the concentricity of the bearing seats of the two bearings 200 sleeved on the periphery of the motor shaft, to avoid problems such as large motor shaft runout, large vibration, high noise and the like, and to improve the service life of the motor.

[0056] In the embodiment, the inner diameter of the two bearing chambers 130 is φD4, the outer diameter of the rotating shaft 300 is φD3, and the distance (the distance of the baffle 120 on the axis of the rotating shaft 300) between the first bearing chamber and the second bearing chamber is L2. Preferably, the distance L2 of the baffle 120 on the axis of the rotating shaft 300 is less than one fourth of the outer diameter D3 of the rotating shaft 300, and the distance L2 of the baffle 120 on the axis of the rotating shaft 300 is less than one eighth of the inner diameter D4 of the bearing chamber 130. In this way, the distance between the first bearing chamber and the second bearing chamber is short, and the length of the cantilever is reduced, so that the axial jump of the motor is small, and there is no vibration, which will not cause the bearing chamber 130 to be ground, the rotating shaft 300 to be ground, and the bearing 200 to be stuck and fail. The motor can run smoothly, stably, without vibration and with low noise even under load.

[0057] In the embodiment, the motor further comprises a control panel 400 mounted on one side of the middle cover 100. The control panel 400 is provided with limiting holes and connecting pieces. Various functional components are designed on the control panel 400 to control the operation of the motor.

[0058] Please refer to Figure 2 , Figure 4 and Figure 5 . The middle cover 100 comprises a first mounting portion 140 and a second mounting portion 150. The first mounting portion 140 and the second mounting portion 150 are located on both sides of the middle cover 100 in the axial direction of the rotating shaft 300. The second mounting portion 150 is provided with limiting shafts 151 and mounting holes 152. The limiting shafts 151 can be arranged in the corresponding limiting holes to position the control panel 400. The mounting holes 152 are used for connecting the connecting pieces to fix the control panel 400.

[0059] The limiting shafts 151 and the mounting holes 152 are both two, and the distance between the axes of the two limiting shafts 151 and the two limiting holes and the axis of the second mounting portion 150 is the same. That is, the two limiting shafts 151 and the two limiting holes are located on the same circumference of the second mounting portion 150, and the two limiting shafts 151 and the two limiting holes are staggered to make the distance between the adjacent limiting shafts 151 and the limiting holes the same.

[0060] The connecting pieces can be screws, and the mounting holes 152 can be screw holes. The mounting process is as follows: first, align the two limiting holes and the two limiting shafts 151 to position the control panel 400 on the second mounting portion 150 of the middle cover 100, and then tighten the two connecting pieces to the two corresponding mounting holes 152 to fix the control panel 400 to the middle cover 100.

[0061] In some embodiments, the end of the limiting shaft 151 away from the middle cover 100 is provided with a guide portion. The diameter of the guide portion is smaller than the diameter of the limiting hole, so that the limiting hole can enter the limiting shaft 151 along the guide portion, which can improve the installation efficiency.

[0062] It should be noted that the motor further comprises a stator assembly 500, the stator assembly 500 comprising a stator core and a stator winding wound on the stator core; the first protrusion 110 is located on the outer side circumferential wall on the side of the first mounting portion 140, and is provided with a mounting position 111 for mounting the stator core and a protruding rib 112 for limiting rotation of the stator core relative to the middle cover 100.

[0063] The stator core is mounted on the side of the middle cover 100 away from the control panel 400 through the mounting position 111, and the inner hole of the stator core is connected with the outer side circumferential wall of the first protrusion 110, and the protruding rib 112 is arranged on the outer side circumferential wall of the first protrusion 110, which can prevent the stator core from rotating relative to the middle cover 100.

[0064] Please refer to Figure 10 , Figure 11 and Figure 12 In addition, the motor further comprises a housing, the housing comprising an upper housing 600 mounted on the first mounting portion 140 to form a first accommodating cavity, and a first recess annularly arranged on the circumference of the upper housing 600, and a first sealing ring 610 mounted in the first recess, and a first protruding ring 141 adapted to the first recess arranged on the circumference of the first mounting portion 140, and a second protruding ring 143 arranged between the first protruding ring 141 and the first protrusion 110, and the first protruding ring 141 abuts and compresses the first sealing ring 610 arranged in the first recess, and the first sealing ring 610 can be an O-ring to prevent dust and water.

[0065] The motor further comprises a machine shell 800 located in the first accommodating cavity, the machine shell 800 comprising a first end sleeved on the outer circumference of the rotating shaft 300 and a second end sleeved on the outer circumference of the stator assembly 500, and a permanent magnet 810 mounted on the inner side of the second end, and a first gap existing between the permanent magnet 810 and the outer circumference of the stator assembly 500, and the second protruding ring 143 is located on the outer side of the second end and has a second gap with the second end, it should be noted that the motor comprises a rotor and a stator, the rotor comprising the machine shell 800, the permanent magnet 810, the bearing 200 and the rotating shaft 300, and the stator comprising the stator core, the plastic middle cover 100 and the stator winding, and the stator winding being made of enameled round copper wire, and when the stator winding in the stator assembly 500 is electrified to generate a magnetic field, the machine shell 800, the permanent magnet 810 and the rotating shaft 300 can be driven to rotate synchronously.

[0066] The housing further comprises a lower housing 700 mounted on the second mounting portion 150 to form a second accommodating cavity, and the control panel 400 is located in the second accommodating cavity, and the second mounting portion 150 is provided with a second recess 153 annularly arranged on the circumference thereof, and a second sealing ring 154 mounted in the second recess 153, and the lower housing 700 is provided with an abutting portion capable of abutting and compressing the second sealing ring 154, and the first sealing ring 610 can also be an O-ring to prevent dust and water.

[0067] The control board 400 is sealed by the middle cover 100 and the lower shell 700, the stator assembly 500 and the shell 800 are sealed by the upper shell 600 and the middle cover 100, and the sealing is strengthened by the first sealing ring 610 and the second sealing ring 154, which can prevent water and dust, and can reach the IP55 protection level.

[0068] It should be noted that the end of the rotating shaft 300 extending out of the upper shell 600 is also connected with a waterproof fan head 900, the fan head 900 is fixed with the end of the rotating shaft 300 by screws, and the load fan blade is installed on the fan head 900.

[0069] In the embodiment, the middle cover 100 is also provided with a plurality of wire holes 160, preferably three, and the power supply line is arranged in the corresponding wire hole 160 to be connected to the corresponding stator winding, so as to realize the purpose of generating a magnetic field by energizing the stator winding and rotating the rotating shaft 300.

[0070] Please refer to Figure 2 , Figure 3 and Figure 8 , considering the structural strength of the middle cover 100, the second mounting portion 150 is preferably provided with a first reinforcing rib 155, a second reinforcing rib 156, and a reinforcing bump 157, the first reinforcing rib 155 extends along the radial direction of the second mounting portion 150, the second reinforcing rib 156 is arranged in the circumferential direction of the second mounting portion 150 in a circular ring shape, and the reinforcing bump 157 is adjacent to the wire hole 160, so as to reduce the deformation of the middle cover 100 during use.

[0071] The above two limiting shafts 151 and two limiting holes can be arranged at the intersection of the first reinforcing rib 155 and the second reinforcing rib 156, so as to reduce the amount of injection molding material of the middle cover 100.

[0072] Please refer to Figure 6 In the embodiment, the retainer ring 120 includes a boss 121, the boss 121 is located on the end face of the side of the retainer ring 120 away from the control board 400, and the boss 121 is uniformly arranged along the circumferential direction of the retainer ring 120, the distance between the boss 121 and the end face of the retainer ring 120 is preferably 0.8mm-1.2mm, the boss 121 can adjust the distance L2 between the two bearing chambers 130, strengthen the bottom of the bearing chamber 130, and reduce the injection stress deformation.

[0073] The first mounting portion 140 is provided with a first identification point 142 for assembly alignment, the first identification point 142 is a cylindrical structure, and the first identification point 142 is located between the first convex ring 141 and the second convex ring 143, the assembly direction is guided by the first identification point 142, and the assembly alignment is observed, the second mounting portion 150 is provided with a second identification point 158 for assembly alignment, and the second identification point 158 is a triangular structure.

[0074] It should be noted that the relative terms, such as first and second, are used herein solely to distinguish one entity from another without necessarily requiring or implying any actual such relationship or order between such entities.

[0075] The various embodiments described in the specification are presented for the purpose of illustration and description. Each of the embodiments highlights a different aspect of the present application. The embodiments are not mutually exclusive, and portions of one embodiment can be combined with another embodiment.

[0076] The principles and implementation modes of the present application are described herein by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in many ways. These improvements and modifications also fall within the scope of protection of the present application.

Claims

1. An electric machine with an integrated dual bearing housing structure, characterized by, The motor comprises a middle cover, a first protrusion in a ring shape is arranged in the middle part of the middle cover, a retaining ring is arranged in the first protrusion, and two bearing chambers are formed in the first protrusion on both sides of the retaining ring. Two bearings are arranged in the corresponding bearing chambers. A rotating shaft is arranged in the inner rings of the two bearings.

2. The motor with the integrated double-bearing seat structure according to claim 1, further comprising a control board arranged on one side of the middle cover, the control board is provided with a limiting hole and a connecting piece; the middle cover comprises a first mounting part and a second mounting part, the first mounting part and the second mounting part are arranged on both sides of the middle cover in the axial direction of the rotating shaft, the second mounting part is provided with a limiting shaft and a mounting hole, the limiting shaft can be arranged in the corresponding limiting hole to position the control board, and the mounting hole is used for connecting the connecting piece to fix the control board.

3. The motor with the integrated double-bearing seat structure according to claim 2, further comprising a stator assembly, the stator assembly comprises a stator core and a stator winding arranged on the stator core; the first protrusion is provided with a mounting position for mounting the stator core and a protruding rib for limiting the rotation of the stator core relative to the middle cover on the outer circumferential wall on the side of the first mounting part. The motor further comprises a shell, the shell comprises an upper shell arranged on the first mounting part to form a first accommodating cavity, a first groove in a ring shape is arranged on the circumference of the upper shell, a first sealing ring is arranged in the first groove, and a first convex ring adapted to the first groove is arranged on the circumference of the first mounting part to abut and press the first sealing ring in the first groove.

5. The motor with the integrated double-bearing seat structure according to claim 4, wherein the shell further comprises a lower shell arranged on the second mounting part to form a second accommodating cavity, the control board is arranged in the second accommodating cavity, a second groove in a ring shape is arranged on the circumference of the second mounting part, a second sealing ring is arranged in the second groove, and the lower shell is provided with an abutting part capable of abutting and pressing the second sealing ring.

6. The motor with the integrated double-bearing seat structure according to claim 4, further comprising a machine shell arranged in the first accommodating cavity, the machine shell comprises a first end arranged on the outer circumference of the rotating shaft and a second end arranged on the outer circumference of the stator assembly, a permanent magnet is arranged on the inner side of the second end, and a first gap exists between the permanent magnet and the outer circumference of the stator assembly.

7. The motor with the integrated double-bearing seat structure according to claim 3, wherein the middle cover is further provided with a plurality of wire holes, and power lines are arranged in the corresponding wire holes to be connected to the corresponding stator windings.

8. The motor with the integrated double-bearing seat structure according to claim 7, wherein 4. The electric machine with an integrated dual bearing seat structure of claim 3, wherein, ​ ​ ​ ​ ​ ​ ​ ​ The second mounting portion is provided with a first reinforcing rib, a second reinforcing rib and a reinforcing convex bump, the first reinforcing rib extends along the radial direction of the second mounting portion, the second reinforcing rib is arranged in a circular ring shape on the circumferential direction of the second mounting portion, and the reinforcing convex bump is adjacent to the wire passing hole.

9. The motor with the integrated double bearing seat structure according to any one of claims 2 to 8, characterized in that, The stop ring comprises a boss, the boss is located on the end face of the side of the stop ring away from the control panel, and the boss is uniformly arranged along the circumferential direction of the stop ring, and the distance of the stop ring on the shaft axis is less than one fourth of the outer diameter of the rotating shaft.

10. The motor with the integrated double bearing seat structure according to claim 2, characterized in that, The first mounting portion is provided with a first identification point for assembly positioning, and the second mounting portion is provided with a second identification point for assembly positioning.

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