CN211744308U

CN211744308U - Brushless motor axle core lock axle fixed knot constructs

Info

Publication number: CN211744308U
Application number: CN202020166749.4U
Authority: CN
Inventors: 杨倩
Original assignee: Jiangxi Meide Electromechanical Accessories Co ltd
Current assignee: Jiangxi Meide Electromechanical Accessories Co ltd
Priority date: 2020-02-13
Filing date: 2020-02-13
Publication date: 2020-10-23
Anticipated expiration: 2030-02-13

Abstract

The utility model relates to the technical field of brushless motors, in particular to a shaft locking and fixing structure of a brushless motor shaft core, which comprises a first shell and a second shell, wherein stators are arranged inside the first shell and the second shell, rotors are arranged in the stators, rotating shafts are arranged in the rotors, fans are arranged on the circumferential outer walls of the rotating shafts and above the rotors, each fan comprises a shaft sleeve, and fan blades are arranged on the shaft sleeves; a plurality of fresh air inlets have been seted up on the roof of second shell, have the dust screen through the bolt fastening on the roof of second shell, have seted up a plurality of holes of airing exhaust on the diapire of first shell, have seted up the connecting hole in the pivot, are equipped with the fixture block of a pair of mutual symmetry in the connecting hole, and the draw-in groove has been seted up with the corresponding position of fixture block to the axle sleeve. The utility model discloses a fixture block and draw-in groove that set up have solved because the mode that adopts interference fit between motor and the fan is many is connected, this kind of connected mode, and difficult dismantlement can very inconvenient problem when the motor is maintained.

Description

Brushless motor axle core lock axle fixed knot constructs

Technical Field

The utility model relates to a brushless motor technical field specifically is a brushless motor axle core lock axle fixed knot constructs.

Background

The brushless motor is a motor which adopts a semiconductor switch device to realize electronic commutation, and the electronic switch device is used to replace the traditional contact commutator and electric brush, so that the brushless motor has the advantages of no mechanical noise, long service life, high-speed rotation, high precision, easy control and the like. The brushless motor is widely applied to a plurality of fields such as a model airplane, medical equipment, household appliances and electric vehicles, and because the brushless motor can generate heat to generate high temperature when working, the fan is required to be arranged on a rotating shaft of the motor, the heat dissipation is carried out when the motor rotates, but because the interference fit mode is adopted to connect the motor and the fan, the connection mode is not easy to detach, and the motor can be very inconvenient to maintain. In view of this, we propose a shaft locking and fixing structure for a brushless motor shaft core.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a brushless motor axle core lock axle fixed knot constructs to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a brushless motor shaft core lock shaft fixing structure comprises a first shell and a second shell, wherein the first shell and the second shell jointly form a shell of a motor, stators are arranged inside the first shell and the second shell, rotors are tightly attached to the stators, a rotating shaft which is rotatably connected with the rotors is arranged in the middle of the rotors, the upper end and the lower end of the rotating shaft extend towards the upper end and the lower end of the rotors, the bottom end of the rotating shaft is rotatably connected with the inner wall of the bottom end of the first shell through a bearing, the top end of the rotating shaft penetrates through the top wall of the second shell and is rotatably connected with the second shell, a fan is arranged on the circumferential outer wall of the rotating shaft and above the rotors, the fan comprises a shaft sleeve, and a plurality of blades which are arranged in an annular equal interval are tightly bonded on the circumferential outer wall of the shaft sleeve; a plurality of air inlet holes are formed in the top wall of the second shell, a dust screen is fixed to the top wall of the second shell through bolts, and a plurality of air exhaust holes are formed in the bottom wall of the first shell.

Preferably, the circumference outer wall bottom of first shell has first fixed block in the close welding, just the close welding has the support on the diapire of first shell, the support is ring shape, just the bottom surface of first fixed block with the bottom surface of support is parallel.

Preferably, the top end of the circumferential outer wall of the first shell is tightly welded with at least two first connecting blocks, and the bottom end of the circumferential outer wall of the second shell is tightly welded with second connecting blocks in one-to-one correspondence with the first connecting blocks.

Preferably, the top of pivot is equipped with the fixed plate, the intermediate position of fixed plate seted up with the hole is established in inlaying of pivot looks adaptation, just it has the second fixed block that quantity is two at least to closely weld on the outer wall of fixed plate, just the pivot is located the locating hole has been seted up to the one end in the fixed plate, also seted up on the fixed plate with the fixed orifices of locating hole looks adaptation.

Preferably, a connecting hole is formed in the position where the rotating shaft is connected with the shaft sleeve, a pair of symmetrical clamping blocks are connected in the connecting hole in a sliding mode, and clamping grooves are formed in the positions, corresponding to the clamping blocks, of the shaft sleeve.

Preferably, a spring is tightly bonded between the two clamping blocks, a control block is tightly bonded on the clamping blocks, and a convex block which is in an integrally formed structure with the control block is arranged on the top surface of the control block.

Preferably, the outer wall of the control block is matched with the circumferential outer wall of the rotating shaft, and the length of the shaft sleeve is smaller than that of the connecting hole.

Compared with the prior art, the beneficial effects of the utility model are that:

this brushless motor axle core lock axle fixed knot constructs, fixture block and draw-in groove through setting up, when the assembly with dismantle the fan, all can carry out quick convenient assembly and dismantlement through pressing the lug, and because the support and the elasticity of spring 322, when using the motor, can make the fixture block firmly inlay throughout and locate in the draw-in groove, the compactness of connecting between fan and pivot has been ensured, and still through the fresh air inlet that sets up, hole and dust screen of airing exhaust, when keeping fan radiating efficiency, can prevent that the dust from entering into inside the motor, solved because the mode that adopts interference fit between motor and the fan is many is connected, connection methods such as this, difficult dismantlement, can very inconvenient problem when the motor is maintained.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a sectional view of the structure of the rotating shaft and the fan;

fig. 4 is a top view of a first housing of the present invention;

fig. 5 is a schematic structural diagram of a bottom of the first housing in the present invention.

In the figure: a first housing 1; a first fixing block 11; a first connecting block 12; an air exhaust hole 13; a bearing 14; a support 15; a second housing 2; a second connecting block 21; a dust screen 22; an air inlet hole 23; a rotating shaft 3; positioning holes 31; a connecting hole 32; a latch 321; a spring 322; a control block 323; a bump 324; a fan 4; a shaft sleeve 41; a card slot 411; fan blades 42; a fixed plate 5; a second fixing block 51; a stator 6; and a rotor 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1-5, the present invention provides a technical solution:

a brushless motor shaft core lock shaft fixing structure comprises a first shell 1 and a second shell 2, the first shell 1 and the second shell 2 jointly form a shell of a motor, a stator 6 is arranged inside the first shell 1 and the second shell 2, a rotor 7 is installed in the stator 6 in a clinging mode, a rotating shaft 3 which is rotatably connected with the rotor 7 is arranged in the middle of the rotor 7, the upper end and the lower end of the rotating shaft 3 extend towards the upper end and the lower end of the rotor 7, the bottom end of the rotating shaft 3 is rotatably connected with the inner wall of the bottom end of the first shell 1 through a bearing 14, the top end of the rotating shaft 3 penetrates through the top wall of the second shell 2 and is rotatably connected with the second shell 2, a fan 4 is arranged on the circumferential outer wall of the rotating shaft 3 and above the rotor 7, the fan 4 comprises a shaft sleeve 41, and a plurality of annular fan blades 42 which are arranged at equal intervals are tightly bonded; a plurality of air inlet holes 23 are formed in the top wall of the second shell 2, a dust screen 22 is fixed to the top wall of the second shell 2 through bolts, and a plurality of air outlet holes 13 are formed in the bottom wall of the first shell 1.

In this embodiment, the first fixed block 11 is tightly welded at the bottom end of the outer wall of the circumference of the first housing 1, and the support 15 is tightly welded on the bottom wall of the first housing 1, the support 15 is in a circular ring shape, the bottom surface of the first fixed block 11 is parallel to the bottom surface of the support 15, the first fixed block 11 is provided with a threaded hole for fixing the brushless motor, and the support 5 enables the brushless motor to work after being fixed, and the brushless motor can still be discharged through the exhaust hole 13 through hot air in the working process, thereby ensuring that the inside of the brushless motor keeps rapid air circulation constantly, and improving the heat dissipation efficiency.

In addition, the circumference outer wall top close welding of first shell 1 has the first connecting block 12 that quantity is two at least, and the circumference outer wall bottom close welding of second shell 2 has the second connecting block 21 with 12 one-to-one of first connecting block, and all offers the screw hole that corresponds on first connecting block 12 and the second connecting block 21 for can first shell 1 of quick assembly disassembly and second shell 2, very big improvement maintenance efficiency when the maintenance.

In addition, the top of pivot 3 is equipped with fixed plate 5, the intermediate position of fixed plate 5 is seted up with 3 looks adaptations of pivot inlay and is established the hole, and the close welding has the second fixed block 51 that quantity is two at least on the outer wall of fixed plate 5, and the one end that pivot 3 is located fixed plate 5 has seted up locating hole 31, also set up the fixed orifices with locating hole 31 looks adaptation on the fixed plate 5, fixed block 5 is used for being connected with outside equipment, through seting up the screw hole on the second fixed block 51, adopt the bolt closely fixed, when maintaining, can be more swift, the efficiency of maintenance has been improved.

Furthermore, a connecting hole 32 is formed in a position where the rotating shaft 3 is connected with the shaft sleeve 41, a pair of symmetrical fixture blocks 321 are slidably connected in the connecting hole 32, a clamping groove 411 is formed in a position where the shaft sleeve 41 corresponds to the fixture blocks 321, and the fan 4 can be firmly fixed on the rotating shaft 3 through the matching of the remaining clamping grooves 411 of the fixture blocks 321.

Furthermore, a spring 322 is tightly bonded between the two clamping blocks 321, a control block 323 is tightly bonded on the clamping blocks 321, a convex block 324 which is integrally formed with the control block 323 is arranged on the top surface of the control block 323, when the fan 4 is assembled, only the two convex blocks 324 need to be held, and the fan is pressed towards the center direction of the rotating shaft 3, the control block 323 can simultaneously move towards the center direction of the connecting hole 32, so that the clamping blocks 321 can be driven to move towards the middle direction of the connecting hole 32, when the outer walls of the clamping blocks 321 and the rotating shaft 3 are aligned, the shaft sleeve 41 is embedded on the rotating shaft 3, and when the clamping blocks 321 can be just embedded in the clamping grooves 411, the convex blocks 324 are released, so that the fan 4 can be assembled quickly.

Furthermore, the outer wall of the control block 323 is matched with the circumferential outer wall of the rotating shaft 3, and the length of the shaft sleeve 41 is smaller than that of the connecting hole 32, so that when the fan 4 is assembled and disassembled, the control block 323 cannot prevent the fan 4 from sliding up and down on the shaft wall of the rotating shaft 3, and the assembly and the disassembly of the fan 4 are smooth.

It should be added that the sum of the heights of the control block 323 and the fixture block 321 is exactly equal to the height of the connection hole 32, the upper end and the lower end of the protrusion 324 are both arc-shaped, and the distance from the bottom surface of the protrusion 324 to the top surface of the fixture block 321 is smaller than the height of the fixture slot 411, so as to further avoid the phenomenon that the protrusion 324 is not clamped in the fixture slot 411 when the fan 4 is assembled and disassembled, and further the assembly or disassembly cannot be performed.

It should be noted that the present invention is only directed to the improvement of the housing of the brushless motor and the connection manner between the rotating shaft 3 and the fan 4, and does not relate to the improvement of the internal structure of the brushless motor, such as the stator 6 and the rotor 7, which are well-known in the art, and it will not be described again here.

When the brushless motor shaft core lock shaft fixing structure of the embodiment is used, firstly, the fan 4 is assembled on the rotating shaft 3, only the fan 4 needs to be embedded on the rotating shaft 3 through the shaft sleeve 41, then the fan 4 is pressed downwards, when the shaft sleeve 41 contacts the convex block 324, because the upper end and the lower end of the convex block 324 are both arc-shaped, the fan 4 is continuously pressed at the moment, under the action of the extrusion force, the two convex blocks 324 move towards the middle direction of the connecting hole 32, the control block 323 and the fixture block 321 also move towards the middle direction of the connecting hole 32, the spring 322 deforms, when the outer wall of the fixture block 321 is flush with the outer wall of the rotating shaft 3, at the moment, the fan 4 can continue to move downwards, until the fixture block 321 is just embedded in the clamping groove 411, the spring 322 recovers the initial state and firmly embeds the fixture block 321 in the clamping groove 411, and then the first shell 1 and the second shell 2 can be tightly fixed through the first connecting, when needs maintain, when dismantling fan 4, only need press lug 324 earlier for fixture block 321 breaks away from draw-in groove 411, and lift up fan 4 afterwards, when making axle sleeve 41 just in time can extrude the lower extreme of lug 324, loosen lug 324, continue to lift up fan 4, can accomplish the dismantlement, solved because adopt interference fit's mode to connect between motor and the fan more, these connection methods, difficult dismantlement can very inconvenient problem when the motor is maintaining.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a brushless motor axle core lock axle fixed knot constructs, includes first shell (1) and second shell (2), its characterized in that: the motor is characterized in that the first shell (1) and the second shell (2) jointly form a shell of the motor, a stator (6) is arranged inside the first shell (1) and the second shell (2), a rotor (7) is tightly attached to the stator (6), a rotating shaft (3) rotatably connected with the rotor (7) is arranged at the middle position of the rotor (7), the upper end and the lower end of the rotating shaft (3) extend towards the upper end and the lower end of the rotor (7), the bottom end of the rotating shaft (3) is rotatably connected with the inner wall of the bottom end of the first shell (1) through a bearing (14), the top end of the rotating shaft (3) penetrates through the top wall of the second shell (2) and is rotatably connected with the second shell (2), a fan (4) is arranged on the outer wall of the circumference of the rotating shaft (3) and above the rotor (7), and the fan (4) comprises a shaft sleeve (41), a plurality of annular fan blades (42) which are arranged at equal intervals are closely adhered to the outer wall of the circumference of the shaft sleeve (41); a plurality of air inlet holes (23) are formed in the top wall of the second shell (2), a dust screen (22) is fixed to the top wall of the second shell (2) through bolts, and a plurality of air exhaust holes (13) are formed in the bottom wall of the first shell (1).

2. The shaft locking and fixing structure of the brushless motor shaft core according to claim 1, characterized in that: the circumference outer wall bottom of first shell (1) closely welds has first fixed block (11), just closely weld on the diapire of first shell (1) has support (15), support (15) are ring shape, just the bottom surface of first fixed block (11) with the bottom surface of support (15) is parallel.

3. The shaft locking and fixing structure of the brushless motor shaft core according to claim 1, characterized in that: the circumference outer wall top close welding of first shell (1) has first connecting block (12) that quantity is two at least, the circumference outer wall bottom close welding of second shell (2) have with second connecting block (21) of first connecting block (12) one-to-one.

4. The shaft locking and fixing structure of the brushless motor shaft core according to claim 1, characterized in that: the top of pivot (3) is equipped with fixed plate (5), the intermediate position of fixed plate (5) seted up with the hole is established in inlaying of pivot (3) looks adaptation, just closely weld on the outer wall of fixed plate (5) have second fixed block (51) that quantity is two at least, just pivot (3) are located locating hole (31) have been seted up to the one end in fixed plate (5), also seted up on fixed plate (5) with the fixed orifices of locating hole (31) looks adaptation.

5. The shaft locking and fixing structure of the brushless motor shaft core according to claim 1, characterized in that: the connecting structure is characterized in that a connecting hole (32) is formed in the connecting position of the rotating shaft (3) and the shaft sleeve (41), a pair of symmetrical clamping blocks (321) is connected in the connecting hole (32) in a sliding mode, and clamping grooves (411) are formed in the positions, corresponding to the clamping blocks (321), of the shaft sleeve (41).

6. The shaft locking and fixing structure of the brushless motor shaft core according to claim 5, wherein: a spring (322) is tightly bonded between the two clamping blocks (321), a control block (323) is tightly bonded on the clamping blocks (321), and a convex block (324) which is in an integrated structure with the control block (323) is arranged on the top surface of the control block (323).

7. The shaft locking and fixing structure of the brushless motor shaft core according to claim 6, wherein: the outer wall of the control block (323) is matched with the circumferential outer wall of the rotating shaft (3), and the length of the shaft sleeve (41) is smaller than that of the connecting hole (32).