A kind of Hall sensor fixed structure and motor
Technical field
The present invention relates to the technical field of motor more particularly to a kind of Hall sensor fixed structures and motor.
Background technique
Motor refers to that a kind of calutron that electric energy conversion or transmitting are realized according to the law of electromagnetic induction, main function are to produce
Raw driving torque, as electrical appliance or the power source of various machinery.It is divided by working power type, direct current generator and friendship can be divided into
Galvanic electricity machine.Direct current generator can be divided into brshless DC motor and brushed DC motor by structure and working principle.
Existing motor is generally provided with Hall sensor in end, is either detected with detecting the position of shaft of motor
The revolving speed of motor.Specific structure is as shown in Figure 1-3, the Hall sensor fixed structure in the end of motor includes end cap 1 ', sets
There are the pcb board 2 ' and protective shell 3 ' of Hall sensor, end cap 1 ' has above been pierced by shaft 4 ', and the end of shaft 4 ' is provided with magnet ring
5 ', end cap 1 ' is above provided with electric terminal 12 ', and electric terminal 12 ' is connected with female terminal 13 ', and pcb board 2 ' is provided with fixation hole above
22 ' are above provided with screw hole with connecting hole 23 ', protective shell 3 ', and screw 6 ' passes through fixation hole 22 ' and is fixed on screw hole, by pcb board 2 '
It is fixed on that protective shell 3 ' is interior, protective shell 3 ' is provided with the lead 7 ' being electrically connected with pcb board 2 ' outside.When assembly, as shown in Figures 2 and 3,
Protective shell 3 ' is depressed into the side of end cap 1 ', the i.e. outer peripheral surface of the casing of motor, connection is inserted into the end of female terminal 13 ' at this time
Electric terminal 12 ' is linked into the circuit of pcb board 2 ' by hole 23 '.
Protective shell 3 ' is tightly placed on the outer peripheral surface of the casing of motor by such structure, since casing is by by Sheet Metal Forming Technology
Cold-rolled strip stretching be made, the outer diameter of casing gradually becomes smaller from end cap 1 ' to the direction of one end away from end cap 1 ', protective shell
3 ' generally by plastic rubber material injection molding, and injection molding is with draw taper requirement, and therefore, the internal diameter of 3 ' endface of protective shell is most
Greatly, the internal diameter of the bottom of protective shell 3 ' is minimum, in order to the demoulding of protective shell 3 '.Therefore, such Hall sensor fixed structure
Protective shell 3 ' loosens phenomenon being tightly placed in will appear outside casing for a long time, directly affects Hall sensor signal in reaction magnetic ring
The accuracy of output.
Summary of the invention
The first object of the present invention is to propose a kind of Hall sensor fixed structure, is fixedly secured pcb board and protective shell,
It avoids loosening, to guarantee Hall sensor the operation is stable.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of Hall sensor fixed structure including end cap, is provided with the pcb board and protective shell of Hall sensor, institute
It states pcb board and is fixed with the end cap by the first fixed part, outside the end cap, the pcb board is placed in the protection valve jacket
In the protective shell, and the protective shell is fixed with the pcb board by the second fixed part, is opened up in the middle part of the end cap useful
In the through-hole that shaft is stretched out, the extension end of the shaft is fixed with magnet ring.
Wherein, first fixed part includes the fixed column being convexly equipped on end cap, be provided on the pcb board with it is described solid
The corresponding fixation hole of fixed column, the pcb board are sheathed on the fixed column by the fixation hole.
Wherein, the fixed column and/or the fixation hole are provided with first step portion, to the fixed column and described solid
Determine hole to position in short transverse.
Wherein, the top of the fixed column offers screw hole, and the pcb board is fixed by the screw cooperated with the screw hole
In the fixed column.
Wherein, first fixed part includes the card column being convexly equipped on the end cap, and barb, institute are provided in the card column
It states barb and reaches pcb board described in the positive and clamping of the pcb board.
Wherein, the pcb board offers the through-hole stretched out for shaft, and the magnet ring is fixed on described in the shaft stretching
The end of pcb board, the Hall sensor are located at the pcb board close to the side of the magnet ring.
Wherein, the end cap is convexly equipped with electric terminal, and connecting hole corresponding with the electric terminal is offered on the pcb board,
The Hall sensor is electrically connected with the connecting hole.
Wherein, second fixed part includes the grab for being set to the inner wall of protective shell, and the pcb board is in the grab pair
The position answered is provided with card slot, reverse side of the grab from pcb board described in clamping after card slot insertion.
Wherein, the side wall of the protective shell is provided with second step portion, and the second step portion and the grab block respectively
The obverse and reverse of the tight pcb board.
The second object of the present invention is to propose a kind of motor, can be fixedly secured pcb board and protective shell, avoid loosening,
To guarantee Hall sensor the operation is stable.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of motor is provided with above-mentioned Hall sensor fixed structure in one end of the output shaft away from motor.
The utility model has the advantages that the present invention provides a kind of Hall sensor fixed structure and including the Hall sensor fixed structure
Motor.Hall sensor fixed structure includes end cap, the pcb board and protective shell for being provided with Hall sensor, the pcb board
It is fixed with the end cap by the first fixed part, for the protection valve jacket outside the end cap, the pcb board is placed in the protection
In shell, and the protective shell is fixed with the pcb board by the second fixed part, is offered in the middle part of the end cap and is stretched for shaft
The extension end of through-hole out, the shaft is fixed with magnet ring.Pcb board is fixed by the first fixed part with end cap, ensure that pcb board
Protective shell to guarantee Hall sensor the operation is stable, then is fixed on PCB by the second fixed part by the influence of unprotected shell
On plate, protective shell is not influenced by casing, will not be loosened.
Detailed description of the invention
Fig. 1 is the explosive view of the motor with Hall sensor fixed structure of the prior art.
Fig. 2 is the installation diagram of the motor with Hall sensor fixed structure of the prior art.
Fig. 3 is the partial enlarged view at the A of Fig. 2.
Fig. 4 is the explosive view of the motor with Hall sensor fixed structure of the embodiment of the present invention 1.
Fig. 5 is the installation diagram of the motor with Hall sensor fixed structure of the embodiment of the present invention 1.
Fig. 6 is the partial enlarged view at the B of Fig. 5.
Fig. 7 is the explosive view of the part-structure of the motor with Hall sensor fixed structure of the embodiment of the present invention 2.
Wherein:
1- end cap, 11- fixed column, 111- first step portion, 12- electric terminal, 13- card column, 131- barb, 2-PCB plate,
21- Hall sensor, 22- fixation hole, 23- connecting hole, 24- card slot, 3- protective shell, 31- grab, 32- second step portion, 4- turn
Axis, 5- magnet ring, 6- screw, 7- lead;1 '-end cap, 12 '-electric terminals, 13 '-female terminals, 2 '-pcb boards, 22 '-fixation holes,
23 '-connecting holes, 3 '-protective shells, 4 '-shafts, 5 '-magnet rings, 6 '-screws, 7 '-leads.
Specific embodiment
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
In conjunction with attached drawing and pass through specific embodiment to further illustrate the technical scheme of the present invention.
Embodiment 1
A kind of Hall sensor fixed structure is present embodiments provided, as Figure 4-Figure 6, including end cap 1, is provided with Hall
The pcb board 2 and protective shell 3 of sensor 21, pcb board 2 is fixed with end cap 1 by the first fixed part, and in the present embodiment, first is solid
Determining portion includes the fixed column 11 being convexly equipped on end cap 1, and fixation hole 22, PCB corresponding with fixed column 11 is provided on pcb board 2
Plate 2 is sheathed on fixed column 11 by fixation hole 22, the top of fixed column 11 offers screw hole, and pcb board 2 with screw hole by cooperating
Screw 6 is fixed on fixed column 11,3 sets of protective shell outside end cap 1, pcb board 2 is placed in protective shell 3, and protective shell 3 and pcb board
2 are fixed by the second fixed part, and the middle part of end cap 1 offers the through-hole stretched out for shaft 4, and the extension end of shaft 4 is fixed with
Magnet ring 5.
Compared with prior art, it after the pcb board 2 of the present embodiment is positioned by fixed column 11, fixes, guarantees with 1 phase of end cap
The influence of the unprotected shell 3 of pcb board 2, is directly anchored on end cap 1, thus guarantee 21 the operation is stable of Hall sensor, and by
It is positioned in by fixed column 11, the position precision of Hall sensor 21 can be improved.Protective shell 3 is fixed on by the second fixed part
On pcb board 2, protective shell 3 is not influenced by casing, will not be loosened.The pcb board 2 of the present embodiment is fixed on fixed column by screw 6
11, it is fixed reliable, and fixed column 11 can be used for positioning and fix, structure is simple, easy to assembly.For the ease of 2 knot of pcb board
Structure is stablized, and multiple fixed columns 11 can be set, and multiple fixed columns 11 are distributed in end cap 1 in a ring, so that pcb board 2 is each
The uniform force in direction.The cross section of the fixed column 11 of the present embodiment be it is round, be also possible to other shape, such as rectangle or
Square and pentagon etc., with no restriction.
In order to position conveniently, the fixed column 11 of the present embodiment is provided with first step portion 111, to fixed column 11 and fixation
Hole 22 is positioned in short transverse, and the surface of pcb board 2 is connected to the surface in first step portion 111.First step portion also can be set
In on fixation hole 22, i.e., fixation hole 22 is stepped hole, so that the end face of fixed column 11 is connected to the table at the large aperture end of stepped hole
Face.First step portion can also be respectively provided in fixed column 11 and fixation hole 22, also can be convenient to fixed column 11 and fixed
Hole 22 is positioned in short transverse.
In the present embodiment, pcb board 2 offers the through-hole stretched out for shaft 4, and magnet ring 5 is fixed on shaft 4 and stretches out pcb board 2
End, Hall sensor 21 is located at pcb board 2 close to the side of magnet ring 5.The outside of pcb board 2 is arranged in magnet ring 5, can be as far as possible
The distance between pcb board 2 and end cap 1 are reduced, conducive to the height for reducing fixed column 11, the structure for further increasing fixed column 11 is strong
The stability of degree and pcb board 2.
It is convexly equipped with electric terminal 12 on end cap 1, connecting hole 23 corresponding with electric terminal 12 is offered on pcb board 2, Hall passes
Sensor 21 is electrically connected with connecting hole 23.Electric terminal 12 is directly connect with connecting hole 23, does not need complicated female terminal conduct
Intermediate connector connection, reduces costs, while simplifying structure, also improves the stability of connection.Electric terminal 12 is being inserted into
It, can also the soldering and welding between pcb board 2 after connecting hole 23, it is ensured that the stability of electrical connection, while reinforcing pcb board 2 and end cap 1
Between bonding strength.At this point, fixed column 11 can also be arranged in the opposite side of electric terminal 12, three forms triangle
Structure improves the stability of pcb board 2.
In order to fix protective shell 3 and pcb board 2 by the second fixed part, second fixed part of the present embodiment includes setting
In the grab 31 of the inner wall of protective shell 3, pcb board 2 is provided with card slot 24 in the corresponding position of grab 31, and grab 31 is inserted from card slot 24
Enter the reverse side of rear clamping pcb board 2.In the application, after the front of pcb board 2 refers to assembly, the one side far from end cap 1, i.e., outwardly
Surface.The reverse side of pcb board 2 refers to the face opposite with front, that is, the one side of proximal cover 1 is leaned on, towards the surface of end cap 1.Card slot 24
Conducive to the insertion of grab 31, using grab 31, can be convenient by protective shell 3 and pcb board clamping, and protective shell 3 no longer with casing
Outer surface cooperate fix, grab 31 generally will not due to long-time use and loosen.The side wall of protective shell 3 is provided with second
Stage portion 32, second step portion 32 and grab 31 distinguish the obverse and reverse of clamping pcb board 2, pass through second step portion 32 and card
The cooperation of hook 21, securely by 2 clamping of pcb board, to firmly fix protective shell 3.The generally annular edge in second step portion 32
The inner wall of protective shell 3 is arranged, so that the stress of pcb board 2 and protective shell 3 is more balanced.Second step portion 32 can continuously be set
It sets, is also possible to interruption setting, is not construed as limiting herein.
Embodiment 2
Unlike the first embodiment, as shown in fig. 7, in the present embodiment, the first fixed part includes being convexly equipped on end cap 1
Card column 13, barb 131 is provided in card column 13, and barb 131 reaches the front of pcb board 2 and clamping pcb board 2.Barb 131 is
Refer to a kick structure being arranged in card column 13.Barb 131 can be it is as shown in Figure 7 from the top of card column 13 stretch out
And it is divided into the bulge-structure of several valves, it can be open up corresponding through-hole on pcb board 2 at this time, by the leading to from pcb board 2 of barb 131
It is caught on hole, barb 131 voluntarily can shrink evacuation until by resetting after through-hole, and pcb board is blocked.It can also be card column 13
Body has certain elasticity, and barb 131 is the kick structure of only one direction, can set corresponding position on pcb board 2
Card slot corresponding with card column 13 is set, card column 13 reaches the front of pcb board 2 from card slot, when pcb board 2 pushes, card column 13
On barb 131 can avoid, barb 131 can spring back the front for blocking pcb board after reaching the front of pcb board 2.In order to obtain ratio
Preferable snap effect can be arranged stage portion in the lower end of barb 131, position to pcb board 2.
The present embodiment can also be combined with embodiment 1, i.e., be provided with fixed column 11 and card column 13, PCB simultaneously on end cap 1
Corresponding fixation hole 22 is opened up on plate 2, for positioning with the cooperation of fixed column 11, and by 13 clamping pcb board of card column, does not need to make
It is screwed.Stage portion can be still arranged in fixed column 11, form first step portion 111, to 2 axially position of pcb board,
Cooperate with barb and fixes 2 phase of pcb board.
Embodiment 3
A kind of motor is present embodiments provided, one end of the output shaft away from motor is provided with above-mentioned Hall sensor
Fixed structure.Compared with prior art, pcb board 2 is fixed by the first fixed part and end cap 1, ensure that pcb board 2 is unprotected
Protective shell 3 to guarantee Hall sensor the operation is stable, then is fixed on pcb board 1 by the influence of shell 3 by the second fixed part,
Protective shell 3 is not influenced by casing, will not be loosened.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.