CN2653768Y

CN2653768Y - Rotor structure improvement of step motor

Info

Publication number: CN2653768Y
Application number: CN 200320124509
Authority: CN
Inventors: 陈伯源
Original assignee: BIMAO SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: BIMAO SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2003-11-11
Filing date: 2003-11-11
Publication date: 2004-11-03
Anticipated expiration: 2013-11-11

Abstract

The utility model relates to the structure improvement of a stepping rotor; the rotor comprises a rotating shaft, a keeper which is combined on the rotating shaft and a magnet which is fixed connected in the ring surface of the keeper. The keeper is internally and integratedly provided with a group of counterweight piece whose material is different from the material of the keeper. The weight and the inertia of the rotor can be moderately adjusted beyond that the mold and the size of the keeper need not to be changed to improve the resonance characteristic between the stepping motor and the implement in which the stepping motor is arranged; keeping away from the using frequency scope of the implement in which the stepping motor is arranged so as to prevent the reducing of the torque force, the generating of the noise and the unsmooth of the transmitting.

Description

The rotor structure improvement of stepper motor

Technical field

The utility model relates to a kind of rotor structure improvement of stepper motor.

Background technology

See also shown in Fig. 1,2, known stepper motor 10 comprises stator 11, housing 12, clutch shaft bearing 13, stator 14, rotor 16, second bearing 18, lid 19, wherein: on the dead eye 121 of housing 12, its center is provided with an axis hole 132 to clutch shaft bearing 13 with its riveting part 131 rivet clasps; Second bearing 18 also with its riveting part 181 rivet clasps on the dead eye 191 of lid 19, its center also is provided with an axis hole 182; Housing 12 is a hollow housing, the one side is sky, opposite side is sealing, the center of this blind end is provided with a dead eye 121, can be urgent in the housing 12 go into the stator 11 that has accommodation chamber 113 in the middle of, stator 11 anchor rings are provided with several coils 112, this coil 112 and a lead 111 bindings, thereby can provide electric current by this lead 111, make coil 112 produce induced field; The accommodation chamber 113 of stator 11 can a ccontaining rotor 16 in wherein, rotor 16 is coated and fixed by the stage casing of an annular retaining device 161 with a rotating shaft 162, the anchor ring of retainer 161 is set one magnetite 163 again, and the two ends of this rotating shaft 162 pass axis hole 132,182 outsides of first and second bearing 13,18; In addition, the saturating dead end of housing 12 gives packing with lid 19 and covers, and is provided with a reed 15 with central hole 151 between the retainer 161 of clutch shaft bearing 13 and rotor 16, with these reed 15 contact rotors 16, and avoids it to produce axial skew; Be equipped with a pad 17 with central hole 171 between the retainer 161 of this second bearing 18 and rotor 16; The lateral surface of these housing 12 blind ends is provided with the riveted pipe 123 of several tool perforation 122, this each riveted pipe 123 can pass one and be fixed in the relative number perforation 143 on the stator 14 in precalculated position and riveted is fixed, clutch shaft bearing 13 is passed from the central shaft hole 144 of stator 14, and this stator 14 141,142 is fixed on the precalculated position of the equipment of being installed to bore a hole in addition; This known stepper motor 10 can be installed on the equipment such as scanner, printer, facsimile machine, video camera, air conditioner, digital camera, copying machines, electronic whiteboard, DVD ROM, monitor and drive its work.And with regard to known technical field, stepper motor 10 has eigentone because of the moment of inertia of rotor, the stepper motor itself that itself and incoming frequency will cause when synchronous vibrates and will cause wild effect, and then generation noise, when the resonance frequency of the resonance frequency of stepper motor and equipment itself is identical, also will cause the resonance noise and the torsion of equipment to change, and the output performance of this equipment is reduced, as shortcomings such as torsion decline, transmission have some setbacks.And present industry is for overcoming the employed method of the problems referred to above, shown in Fig. 3 A, B, C, it is mode by size, shape, material and the structure that changes retainer 161, to change the overall weight and the moment of inertia of rotor, and then the output spectrum of change stepper motor, yet the mode of above-mentioned change retainer weight and the moment of inertia, must constantly change mould or offer new mould or the change manufacture, and change each time, all must test again again, so the program of repetitiousness will improve production cost and complexity greatly, remain in fact to be improved.

The utility model content

The purpose of this utility model is to provide a kind of rotor structure improvement of stepper motor, and it can conveniently adjust rotor weight and the moment of inertia, so that make the output resonance spectrum of stepper motor avoid installing the frequency of utilization scope of this stepper motor equipment.

For achieving the above object, technical solution of the present utility model is: a kind of rotor structure improvement of stepper motor, this rotor comprises rotating shaft, be incorporated into the retainer in the rotating shaft and be consolidated in the magnetite of retainer anchor ring, one-body moldedly in this retainer is coated with one group to be different from the counterweight that the retainer material is made.

This counterweight can be the Unit Weight of Unit Weight or multiple.

The radially anchor ring of this counterweight is the symmetrical balance state.

The radially anchor ring of this counterweight is provided with the perforation of symmetry.

This counterweight is made with metal or ceramic material.

This retainer combines with plastic cement one injection molding method with rotating shaft, and the center of this counterweight be provided with one with the suitable perforation of external diameter of rotating shaft, rotating shaft is worn pivot in this perforation.

This retainer combines in urgent mode with rotating shaft, and the center of this retainer be provided with one with the suitable perforation of external diameter of rotating shaft, rotating shaft is worn pivot in this perforation.

After adopting such scheme, because the utility model one-body molded assembly heavy mail that is coated with in the retainer of rotor, utilize the quality of counterweight and retainer characteristic inequality own, weight when making retainer be incorporated into rotor and the moment of inertia can adjust with the quantity of counterweight and the change of form, therefore can conveniently change the weight and the moment of inertia of rotor, and then the output resonance spectrum of change stepper motor, with the frequency of utilization scope of the equipment of avoiding installing this stepper motor, thereby prevent that the situation that torsion reduces, noise produces, transmission has some setbacks from taking place.

In addition, the utility model also has following advantage:

One, the utility model can change the weight and the moment of inertia of rotor in right amount under the prerequisite that need not change rotor holder shape and structure, therefore not as known techniques, need to change mould or offer mould again, effectively reduce production cost, and shortened time of test and time to volume ahead of time.

Two, the utility model is by having the counterweight design of Unit Weight, and the weight of fine-tuning rotor, and then the output resonance spectrum of fine steps motor are with the frequency of utilization scope of the equipment of avoiding installing stepper motor.

Three, counterweight of the present utility model also can be made as the combination of the Unit Weight or the moment of inertia of multiple, makes the moment of inertia combination utilization between counterweight more flexible.

Description of drawings

Fig. 1 is the three-dimensional exploded view of known stepper motor;

Fig. 2 is the generalized section of known stepper motor;

Fig. 3 A is the stereo appearance figure of known stepper motor retainer;

Fig. 3 B is the stereo appearance figure of the another kind of retainer of known stepper motor;

Fig. 3 C is the stereo appearance figure of known another retainer of stepper motor;

Fig. 4 A is a sectional axonometric drawing of the present utility model;

Fig. 4 B is the sectional axonometric drawing of another embodiment of the utility model;

Fig. 4 C is the utility model sectional axonometric drawing of an embodiment again;

Fig. 4 D is the sectional axonometric drawing of the another embodiment of the utility model;

Fig. 5 is the generalized section that the utility model is applied to stepper motor;

Fig. 6 is another embodiment schematic diagram of the utility model counterweight.

Among the figure:

10 stepper motors, 11 stators, 111 leads, 112 coils

122 perforation of 113 accommodation chambers, 12 housings, 121 dead eyes

123 riveted pipes, 13 clutch shaft bearings, 131 riveting parts, 132 axis holes

14 fixed heads, 141 perforation, 142 perforation, 143 perforation

144 dead eyes, 15 reeds, 151 perforation, 16 rotors

161 retainers, 162 rotating shafts, 163 magnetites, 164 counterweights

171 perforation of 165 counterweights, 166 perforation, 17 pads

18 second bearings, 181 riveting parts, 182 axis holes, 19 lids

191 dead eyes

Embodiment

See also shown in Fig. 4 A, B, C, the D, rotor 16 described in the utility model, similar with known rotor, it also comprises rotating shaft 162, is incorporated into the retainer 161 in the rotating shaft 162, and is consolidated in the magnetite 163 of retainer 161 anchor rings.Wherein, this rotating shaft 162 combines fixing mode to be had with retainer 161: directly in rotating shaft 162 in one-body molded mode, these retainer 161 moulding are fixed, and its molding mode can be plastic cement one injection molding method; Perhaps first moulding retainer 161, and make retainer 161 have a central hole (not indicating figure number for this reason) is worn pivot and in conjunction with fixing with this perforation for rotating shaft 162 is urgent again.The main difference of the utility model and conventional construction is: retainer 161 is in moulding, with one to several counterweight 164 one-body molded being coated in the retainer 161, this counterweight 164 is made with the material that is different from retainer 161, as making with metal, pottery, materials such as polymer that quality is high; And counterweight 164 can be made as a Unit Weight, or is made as the weight (counterweights 165 shown in figure four D) of several times.This retainer 161 combines fixing with rotating shaft 162 as if the mode with plastic cement one ejection formation, then balancing weight 164 will be provided with a central hole (not indicating figure number for this reason) and wear pivot for rotating shaft 162, and the external diameter of this central hole and rotating shaft 162 is close, thereby counterweight 164 can be positioned in the rotating shaft 162 by perforation; And if that this retainer 161 combines with rotating shaft 162 in urgent mode is fixing, then the external diameter of the central hole of this retainer 161 and rotating shaft 162 is close.In addition, the radially anchor ring of this counterweight 164 should be the symmetrical balance state; Please cooperate and consult shown in Figure 6ly, counterweight 164 can be a real ring slice or as shown is the perforation 166 that anchor ring radially is provided with several symmetrical balances.

Please consult shown in Figure 5ly again, it is the generalized section (other structure is identical with known techniques, does not give unnecessary details) that the rotor 16 that is coated with counterweight 164 is applied to stepper motor 10; By the counterweight 164 that is coated in the retainer 161, can change the weight and the moment of inertia of rotor 16, and then the output resonance spectrum of change stepper motor 10, with the frequency of utilization scope of the equipment of avoiding installing this stepper motor 10, thereby prevent that the situation that torsion reduces, noise produces, transmission has some setbacks from taking place.

Claims

1, a kind of rotor structure of stepper motor improvement, this rotor comprises rotating shaft, be incorporated into the retainer in the rotating shaft and be consolidated in the magnetite of retainer anchor ring, it is characterized in that: one-body moldedly in this retainer be coated with one group to be different from the counterweight that the retainer material is made.

2, the rotor structure of a kind of stepper motor as claimed in claim 1 improvement, it is characterized in that: this counterweight can be the Unit Weight of Unit Weight or multiple.

3, the rotor structure of a kind of stepper motor as claimed in claim 1 improvement, it is characterized in that: the radially anchor ring of this counterweight is the symmetrical balance state.

4, the rotor structure of a kind of stepper motor as claimed in claim 1 improvement is characterized in that: the radially anchor ring of this counterweight is provided with the perforation of symmetry.

5, the rotor structure of a kind of stepper motor as claimed in claim 1 improvement, it is characterized in that: this counterweight is made with metal material.

6, the rotor structure of a kind of stepper motor as claimed in claim 1 improvement, it is characterized in that: this counterweight is made with ceramic material.

7, the rotor structure of a kind of stepper motor as claimed in claim 1 improvement, it is characterized in that: this retainer combines with plastic cement one injection molding method with rotating shaft.

8, the rotor structure of a kind of stepper motor as claimed in claim 1 improvement, it is characterized in that: this retainer combines in urgent mode with rotating shaft.

9, the rotor structure of a kind of stepper motor as claimed in claim 7 improvement is characterized in that: the center of this counterweight be provided with one with the suitable perforation of external diameter of rotating shaft, rotating shaft is worn pivot in this perforation.

10, the rotor structure of a kind of stepper motor as claimed in claim 8 improvement is characterized in that: the center of this retainer be provided with one with the suitable perforation of external diameter of rotating shaft, rotating shaft is worn pivot in this perforation.