CN2309664Y

CN2309664Y - New structure of step motor

Info

Publication number: CN2309664Y
Application number: CN 97222280
Authority: CN
Inventors: 李宗晖; 郑春英
Original assignee: MINGZHONG MECHANOELECTRIC INDUSTRY Co Ltd
Current assignee: MINGZHONG MECHANOELECTRIC INDUSTRY Co Ltd
Priority date: 1997-09-16
Filing date: 1997-09-16
Publication date: 1999-03-03
Anticipated expiration: 2007-09-16

Abstract

The utility model provides a new structure of a step motor. A motor stator after completing assembly is arranged in a plastic mould. A bearing is arranged at a hollow part of an upper cover and is injected and molded by plastic, and the upper cover and the bearing are formed into integration. The plastic is also filled in a plurality of pole teeth gaps of two middle pole pieces and two outer shells, and the motor stator combined by the plastic is formed. The other bearing is arranged in a mould trough injected by the plastic, when plastic is injected and molded, the bearing and a shaft cap are formed into integration. The shaft cap is positioned on the motor stator, and through ultrasonic hot melt, the shaft cap and the motor stator are engaged. Each assembly can be effectively fixed, in the operation of the rotor, abnormal friction noises can be not generated, and the utility model is easy to make.

Description

The stepping motor new construction

The utility model relates to a kind of stepping motor, and particularly a kind of rotor is positioned at the stepping motor of stator.

Stepping motor is widely used in various office automation products, computer peripheral product at present.Various office automation equipment such as facsimile machine, scanner for example, it is with so that the mechanism in the automation equipment does action by a small margin rotates, and it also often is used in than on the high-tech product.

Existing stepping motor, be by the magnetic field of generation enamelled wire is arranged on the two bobbin groups around the home, and the two bobbin groups that will finish around the home are installed with on pole piece and two shell bodies in the middle of two, be installed with behind pole piece and two shells in the middle of two in two bobbin groups, and plural hole to have on the shell, after plastic cement injected by plural hole, plastic cement can clad two bobbin groups to reach the fixing of two bobbin groups and two middle pole pieces and shell, but owing to pour into the plastic cement extreme temperatures, regular meeting is melted away the enamelled wire surface insulation lacquer on the two bobbin groups, cause the phenomenon of poor short circuit to take place, the stepping motor that causes making can't use, and above-mentioned stepping motor loam cake and the shaft-cup bearing of assembly separately are with artificial installing, therefore in assembling, fail to make bearing be limited to critical field, when rotor rotation, can make between the axostylus axostyle of rotor and bearing and produce undesired friction, the lighter can make stepping motor produce the friction sound, and severe patient just can make rotor rotate; In addition, motor bobbin group is with loam cake and shaft-cup joint the time, be with artificial welding, therefore slower in the speed of whole stepping motor assembling, and how operation is when also taking a lot of work, the weld part branch of the shaft-cup of above-mentioned loam cake is because of long-time oxidation, makes loam cake and the shaft-cup can't be again and motor bobbin set of bond, causes motor to damage.

The purpose of this utility model is that a kind of stepping motor new construction will be provided, and it can effectively fix each assembly, and during the rotor running, its axostylus axostyle can not produce undesired friction and produce sound with bearing, and it is easy than traditional structure to assemble, and assembling saves time.

Utility model is achieved in that the stepping motor new construction comprises motor stator, rotor, loam cake and shaft-cup, two shell bodies and the two middle pole piece inside that are characterized in stator have a plurality of utmost point teeth that plug, with the affixed two bobbin groups of a plurality of utmost point teeth between pole piece in the middle of two shell bodies and two, in the middle of two pole pieces be respectively have a location hole on the end face with solid edge and anchor point affixed, the joint fastener that has the plurality of openings joint of a plurality of and two shell bodies in the middle of two on the periphery of pole piece, on two bobbin groups, respectively has a terminals seat, be that clamping connection is provided with on the periphery of two shell bodies in the opening of another group, on its two shell bodies end face, have a plurality of location holes; One loam cake has a plurality of anchor points and is positioned on the one shell body, and is extended with a plurality of claws at hollow bulb, is installed with a bearing in claw central authorities; One plastics are to be filled in the gap of motor stator and loam cake, and are provided with plural anchor point endways; One shaft-cup is to be configured in motor stator bottom, and and the anchor point of plastic tip engage.

The terminal cover is installed with at the terminals seat, circuit board and the welding of two terminals seats, and on circuit board, the lid with the terminal cover covers again with wire bonds.

The utility model is an one by the plastics ejection formation with the loam cake of motor stator and the bearing of shaft-cup and each assembly in the lump, plastics are filled in a plurality of utmost points backlash of two middle pole pieces and two shells, can effectively fix each assembly, when the shaft-cup ejection formation, having a plurality of location holes on it can be positioned on a plurality of anchor points of motor stator, fuse the mode secure bond with ultrasonic waves, make easy to assemblyly, engage firm; Loam cake and shaft-cup and matched bearing are one by the plastics ejection formation in the lump, and the bearing standard that accurately enters is limited in the position, make rotor on-stream, and the axostylus axostyle of rotor can undesired friction not take place and produce sound with bearing; The bearing of loam cake and shaft-cup and assembly is an one by the plastics ejection formation in the lump, plastics are filled in the manufacturing process in a plurality of utmost points backlash of pole pieces and two shells in the middle of two, in assembling than traditional structure easily, reduce operation during simple and assembling and save time.

The concrete structure of utility model is gone out by following examples and accompanying drawing group thereof.

Fig. 1 is the manufacturing process schematic diagram of the utility model stepping motor new construction.

Fig. 2 is the structure axonometric exploded view of the utility model stepping motor new construction.

Fig. 3 is that motor stator ejection formation axle is surveyed schematic diagram among Fig. 2.

Fig. 4 is that Fig. 2 makes up outward appearance axle survey schematic diagram.

Fig. 5 is an A-A cross-sectional schematic among Fig. 4.

Fig. 6 is that Fig. 2 structure is implemented schematic diagram.

With reference to Fig. 1,2,3,4, Fig. 1 is that the stepping motor new construction is made flow process, and the first step of processing procedure is bobbin group 1,1 ' processing, be with enamelled wire 11,11 ' around the home two bobbin groups 1,1 ' on;

Second step is middle pole piece 2,2 ' processing, with

pole pieces

2,2 in the middle of two ' its on respectively establish an anchor point 25,24 ' and location hole 25 ', 24, fuse with spot welding fixing, and finish

pole pieces

2,2 in the middle of two ' location positioning, the assembling when being beneficial to two bobbin groups 1,1 ' moulding;

Third step is the processing of motor stator 8 ejection formations, be with first, assembly combination after the processing of second step, again with two shell bodies 3,3 ' be sealed on two bobbin groups 1,1 ' also and two middle pole pieces 2,2 ' engage, pole piece 2 in the middle of two, 2 ' periphery on be convexly equipped with a joint fastener 21,21 ', at two shell bodies 3,3 ' and two middle pole pieces 2,2 ' when engaging, with two shell bodies 3,3 ' periphery upper shed 31,31 ' be bonded on pole pieces 2 in the middle of two, 2 ' joint fastener 21,21 ' on, pole piece 2 in the middle of two, 2 ' and two shell bodies 3,3 ' periphery on offer one for two bobbin groups 1,1 ' terminals seat 12,12 ' extend in pole pieces 2 in the middle of two, 2 ' and two shell bodies 3,3 ' outside opening 22,22 ', 32,32 ', shell body 3,3 ' on have a plurality of

location holes

34,34 ', and after a plurality of location holes 34 on the shell body 3 are positioned at the anchor point 43 of loam cake 4, insert again in the mould of plastics (figure does not show), or it is first with shell body 3 and loam cake 4 joints in the spot welding mode, insert in the mould of plastics again, and with location in the claw 44 of bearing 41 storing loam cakes 4 central hollow portions 42, (as Fig. 5) injects in the mold slots at plastics 5, can make loam cake 4 central hollow portions 42 be full of plastics and clad bearing 41, form and loam cake 4 one, and pole piece 2 in the middle of plastics 5 also can be filled in two, 2 ' and two shell bodies 3,3 ' a plurality of

utmost point teeth

23,23 ', 33,33 ' the gap in, thereby form the motor stator 8 of one, and plastics 5 do not have cladding two bobbin groups 1,1 ' enamelled wire 11,11 ', can guarantee enamelled wire 11,11 ' not can Yin Gaowen and produce mutation;

The 4th step is the rotor combination, is that associated components such as magnet 9 and rotor shaft are combined into rotor 6;

The 5th step is shaft-cup processing, is bearing 71 is inserted in plastics jetting mold groove (figure does not show), when plastics 5 are infused in the mold slots, after shaft-cup 7 moulding, the bearing 71 cladded one that in shaft-cup, form, shaft-cup 7 has a plurality of location holes 72 on it behind ejection formation;

The 6th step is shaft-cup 7 combinations, rotor 6 is inserted in the motor stator 8 that third step is finished, a plurality of location holes 72 with shaft-cup 7 are positioned on a plurality of anchor points 51 of motor stator 8 by plastics 5 ejection formations, fuse the mode secure bond with ultrasonic wave, terminal cover 13 with the plastics ejection formation is installed with at terminals seat 12 again, 12 ' after, with circuit board 14 (as Fig. 6) and two terminals seats 12, after 12 ' welding, be welded on the circuit board 14 with lead-in wire (figure does not show), after again the lid 131 of terminal cover 13 being covered, can finish the encapsulation manufacturing process of a stepping motor.

With reference to Fig. 5, put loam cake 4 central hollow portions 42 at bearing 41, inject in the plastics jetting mold groove (figure does not show) at plastics 5, can make loam cake 4 central hollow portions 42 be full of plastics, and plastics cladding bearing 41 is formed and loam cake 4 one, make bearing 41 limits on normal place, the axostylus axostyle of rotor 6 can accurately be passed to be installed in the bearing, and can not influence rotor 6 rotational travel, plastics 5 are except being one external with loam cake 4 and bearing 41, pole piece 2 in the middle of plastics 5 also can be filled in two, 2 ' and two shell bodies 3,3 ' a plurality of

utmost point teeth

23,23 ', 33, in 33 ' gap, plastics 5 also can be done and motor bobbin group 1,1 ', pole piece 2 in the middle of two, 2 ' and two shell bodies 3,3 ' be the design of one.

Claims

1, a kind of stepping motor new construction, form by motor stator (8), rotor (6), loam cake (4) and shaft-cup (7), wherein motor stator (8) includes two shell bodies (3,3 '), two bobbin groups (1,1 ') and two middle pole pieces (2,2 '), rotor (6) is to be contained in the motor stator (8), it is characterized in that:

A. at two shell bodies (3,3 ') and two middle pole pieces (2,2 ') inside has a plurality of utmost point teeth (23 that plug, 23 ', 33,33 '), with two shell bodies (3,3 ') and two middle pole pieces (2,2 ') between a plurality of utmost point teeth (23,23 ', 33,33 ') affixed two bobbin groups (1,1 '), pole piece (2 in the middle of two, 2 ') be respectively to have a location hole (24 on the end face of periphery, 25 ') and anchor point (25,24 ') affixed, pole piece (2 in the middle of two, 2 ') periphery on have a plurality of and two shell bodies (3,3 ') plurality of openings (31,31 ') joint fastener (21 that engages, 21 '), in two bobbin groups (1,1 ') on respectively have a terminals seat (12,12 '), be that clamping connection is at two shell bodies (3,3 ') periphery is provided with the opening (32 of another group, 32 ') in, at its two shell body (3,3 ') have a plurality of location holes (34 on the end face, 34 '); B. a loam cake (4) has a plurality of anchor points (43) and is positioned on the one shell body (3), and is extended with a plurality of claws (44) at hollow bulb on it, and central authorities are installed with a bearing (41) at claw (44);

C. plastics (5) are to be filled in the gap of motor stator (8) and loam cake (4), and are provided with a plurality of anchor points endways;

D. a shaft-cup (7) is to be configured in motor stator (8) bottom, and and the anchor point (51) of plastic tip engage.

2, stepping motor new construction according to claim 1, it is characterized in that terminal cover (13) is installed with in terminals seat (12,12 '), circuit board (14) and two terminals seats (12,12 ') welding, wire bonds is on circuit board (14), and lid (131) is covered on terminal cover (13).