CN201536314U - Concentric double-driving-shaft step motor - Google Patents
Concentric double-driving-shaft step motor Download PDFInfo
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- CN201536314U CN201536314U CN200920066109XU CN200920066109U CN201536314U CN 201536314 U CN201536314 U CN 201536314U CN 200920066109X U CN200920066109X U CN 200920066109XU CN 200920066109 U CN200920066109 U CN 200920066109U CN 201536314 U CN201536314 U CN 201536314U
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Abstract
The utility model discloses a concentric double-driving-shaft step motor, which comprises a case upper cover (1), a case lower cover (2), an inner rotating shaft (3), an outer rotating shaft (17), stator iron core bodies (16 and 30) of the inner shaft and the outer shaft, two stages of speed reducing transmission gear systems corresponding to the inner rotating shaft and the outer rotating shaft, and a built-in driving circuit PCB (31) of a motor and a driving chip (32), wherein the inner rotating shaft (3) and the outer rotating shaft (17) have the same circle center, the driving chip (32) is welded on the PCB and is used for carrying out micro-step fine division on the inherent stepping angle of the motor, the speed reducing radio of the speed reducing gear system of the inner rotating shaft is 60/1, the speed reducing radio of the speed reducing gear system of the outer rotating shaft is 80/1, and after the micro-step fine division by an IC chip (32), each path can realize six times of fine division control on the basis of the inherent stepping angle of the motor. The utility model is mainly applied to concentric double-pointer driving of various digitalized pointer type instruments, and is particularly favorable for the miniaturization of the pointer type instruments and the integrated display of data.
Description
Technical field
The utility model relates to a kind of concentric double driving shafts stepping motor, and the with one heart two pointers that are mainly used in car digital instrument and other pointer digital instrument drive.
Background technology
Micro-stepping motor for instruments is one of key components of realizing digital instrumentation, by the driving shaft drive gauge pointer of stepping motor, can realize the real-time indication of data.Instrument mainly is single rotation axis form with stepping motor at present, so a stepping motor can only drive a pointer, promptly can only indicate a physical quantity at every turn.But in actual applications, many related physical quantities but need to indicate simultaneously, for example, clock and minute, the water temperature of automobile and oil level, the speed of a motor vehicle and rotating speed, temperature and humidity, height above sea level and atmospheric pressure, usually the stepping motor by two single shafts drove two pointers respectively and indicated in the past, therefore need two scale dial plates, but when the instrument stand is less, adopt the scheme of two independent stepping motors, the restriction of instrument stand physical dimension will be subjected to, if a stepping motor can drive two pointers simultaneously, and two pointers have the identical center of circle, then can be in a scale dial plate centralized displaying two paths of data information, and can thoroughly solve the bottleneck that the dial plate physical dimension is restricted.
Summary of the invention
The utility model provides a kind of concentric double driving shafts stepping motor scheme that can drive two pointers simultaneously, thereby be implemented in the instrument dial integrated indication two-way information simultaneously, and have that control is simple, easily manufactured, cost is lower, size is less, the high characteristics of pointing accuracy.
The most significant technical characterictic of described motor is summarized as follows:
One, electric machine built-in two overlaps independently pointer driving mechanism, and each driving shaft can drive a pointer.
Two, the two-way pointer driving shaft adopts inside and outside same concentric mechanism, promptly has the identical center of circle.
Three, two cover pointer driving shaft mechanisms respectively by two-stage independently the transmission reduction gear device form.
Four, the transmission speed reducing ratio of two cover pointer driving mechanisms is designed to difference, and intrinsic step angle difference is to guarantee inside and outside two pointer driving shaft asynchronous behaviors.
Five, electric machine built-in a slice drive IC can realize the further segmentation of the intrinsic step angle of stepping motor on the basis of two-stage transmission reduction gear device, thereby forms the concentric double driving shafts stepping motor of the moving electromechanical integration of outside free drive.
The concrete technical scheme that the utility model proposes is as follows:
Described concentric double driving shafts stepping motor, comprise the stator core body (16) (30), drive circuit pcb board (31) of outer casing upper cover (1), shell lower cover (2), interior outer shaft etc., its inside and outside rotation axis transfer gear train has corresponding with it I level, II level under drive gear group and two inside and outside rotation axiss.
Described concentric double driving shafts micro-step motor, its outer casing upper cover (1), shell lower cover (2) adopt the snap-fitted structure.
Described concentric double driving shafts micro-step motor, have interior rotation axis (3) and outer rotation axis (17), two rotation axiss are separate, interior rotation axis (3) and interior axle coaxial linking to each other of II level driving gear set driven pulley (13), outer rotation axis (17) and coaxial linking to each other of outer shaft II level driving gear set driven pulley (27), guarantee to drive rotation axis simultaneously when driven pulley rotates, wherein interior rotation axis (3) is a stainless pin, outer rotation axis (17) is a plastic sheath, outer rotation axis (17) is placed on the interior rotation axis (3), the interior rotation axis and the coaxial heart of outer rotation axis.
Described concentric double driving shafts micro-step motor, a built-in drive circuit pcb board (31), be welded with the IC chip (32) of 16 hem facing sheets encapsulation on the pcb board (31), road output pin (the OUTA1 of chip for driving IC (32), OUTA2, OUTA3, OUTA4) directly link to each other with axle stator field phase coil output pin (15) in the described motor, another road output pin (OUTB1, OUTB2, OUTB3, OUTB4) link to each other with the output pin (29) of outer shaft stator field phase coil, with the corresponding chip input pin CWA of two-way output pin, FA, CWB, FB directly leads to the motor outside, direction of principal axis control pin (4) in the leading foot of its motor is defined as respectively, interior Shaft angle control pin (5), interior axle ground VSS (6), interior axle power vd D (7), outer direction of principal axis control pin (18), outer Shaft angle control pin (19), outer shaft ground VSS (20), outer shaft power vd D (21).
Rotation axis transfer gear train in described, its gear train is by interior axle p-m rotor (8), I level driving gear set driven pulley (10), II level driving gear set driving wheel (11), II level driving gear set driven pulley (13) is formed, an interior axle p-m rotor (8) is 9 teeth, with driven pulley (10) engagement that comprises axle I level driving gear set in 54 teeth, an interior axle II level driving gear set driving wheel (11) is 8 teeth, driven pulley (13) engagement with the interior axle II level driving gear set that comprises 80 teeth, the I level driving gear set driven pulley (10) that interior rotation axis under drive gear is is connected as a single entity with II level driving gear set driving wheel (11), the I level transmission of axle and the interlock between the transmission of II level in forming.
Described outer rotation axis transfer gear train, its gear train is made up of outer shaft p-m rotor (22), outer shaft I level driving gear set driven pulley (24) and the outer shaft II level driving gear set driving wheel (25) that is connected as a single entity, outer shaft II level driving gear set driven pulley (27), outer shaft p-m rotor (22) is 9 teeth, with outer shaft I level driving gear set driven pulley (24) engagement that comprises 54 teeth; Outer shaft II level driving gear set driving wheel (25) is 6 teeth, with outer shaft II level driving gear set driven pulley (27) engagement that comprises 80 teeth, the driving wheel (25) of the driven pulley (24) of outer shaft I level driving gear set and outer shaft II level driving gear set is connected as a single entity, I level transmission that forms outer rotation axis under drive gear and be and the interlock between its II level transmission.
Other implementation detail also comprises:
Step motor drive chip (32) can provide the micro-stepping drive signal of 6 times of segmentations on the basis of the intrinsic step angle of described stepping motor, axle (3) has adopted the different double reduction gearing system of speed reducing ratio to drive with outer shaft (17) reducing gear train in the step motor drive, axle reducing gear train speed reducing ratio is 60: 1 in it, and outer shaft reducing gear train speed reducing ratio is 80: 1.In inside and outside rotation axis under drive gear is, the intrinsic step angle that axle pointer rotation axis (3) has in it is (360 ° of ÷ 9)/60=(2/3) °, the intrinsic step angle that outer shaft rotation axis (17) has is (360 ° of ÷ 9)/80=(1/2) °, because the speed reducing ratio of its interior axle is less than the speed reducing ratio of outer shaft, the speed that therefore interior axle drive pointer rotates can slightly drive the speed of pointer rotation faster than outer shaft.
By above measure, the utility model has reduced the complexity of concentric double driving shafts step motor control, particularly inside and outside rotation axis transfer gear train is taked I and II level under drive gear group, greatly reduce the difficulty of Gear Processing, reduce the motor manufacturing cost, helped application and the popularization of described stepping motor on small-sized digital instrumentation.
Description of drawings
Fig. 1 is the utility model outside drawing;
Fig. 2 is the utility model internal structure explosive view;
Fig. 3 is the utility model gear train structural representation;
Fig. 4 is the utility model motor pin winding diagram;
Fig. 5 is the structural representation of the utility model built-in motor driving PCB plate;
Fig. 6 is the utility model stator core body front view and end view.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
The utility model comprises outer casing upper cover (1), shell lower cover (2), interior rotation axis (3), interior direction of principal axis control pin (4), interior Shaft angle control pin (5), interior axle ground VSS (6), interior axle power vd D (7), interior axle p-m rotor (8), the rotating shaft (9) of interior axle p-m rotor, interior axle I level driving gear set driven pulley (10) and the interior axle II level driving gear set driving wheel (11) that is connected as a single entity, the rotating shaft (12) of interior axle I level driving gear set driven pulley, interior axle II level driving gear set driven pulley (13), interior axle two phase coils and support (14), interior axle two phase coil output pins (15), interior axle stator core body (16); Outer rotation axis (17), outer direction of principal axis control pin (18), outer Shaft angle control pin (19), outer shaft ground VSS (20), outer shaft power vd D (21), outer shaft p-m rotor (22), the rotating shaft of outer shaft p-m rotor (23), outer shaft I level driving gear set driven pulley (24) and the outer shaft II level driving gear set driving wheel (25) that is connected as a single entity, the rotating shaft (26) of outer shaft I level driving gear set driven pulley, outer shaft II level driving gear set driven pulley (27), outer shaft two phase coils and support (28), outer shaft phase coil output pin (29), outer shaft stator core body (30), motor-drive circuit pcb board (31), motor drive ic IC (32) forms.Axle p-m rotor (8) and outer shaft p-m rotor (22) are respectively that the plastic gear by 9 teeth is the shell of body wherein, an embedded ring-like permanent magnet.
The described outer casing upper cover of this motor (1), shell lower cover (2) adopt the snap-fitted structure.Interior rotation axis (3) is a stainless pin, and outer rotation axis (17) is a plastic sheath.Outer rotary axle box on interior rotation axis, interior rotation axis and the coaxial heart of outer rotation axis.Interior rotation axis is two separate root pointer driving shafts with outer rotation axis, wherein interior rotation axis (3) and interior axle coaxial linking to each other of II level driving gear set driven pulley (13), outer rotation axis (17) and coaxial linking to each other of outer shaft II level driving gear set driven pulley (27) guarantee can drive rotation axis simultaneously when driven pulley rotates.
This motor is a center line with interior rotation axis, and what arranged in the left side is interior axle drive system, and what arranged on the right side is the outer shaft drive system, and structurally relative independence is so that mutual interference reduces to minimum.
In interior axle reduction gear device structure, interior axle p-m rotor (8) is the motor of interior axle reducing gear train, the directly field drives that is produced by its stator phase coil.An interior axle p-m rotor (8) is 9 teeth, and interior axle I level driving gear set driven pulley (10) is 54 teeth, and interior axle II level driving gear set driving wheel (11) is 8 teeth, and interior axle II level driving gear set driven pulley (13) is 80 teeth.The relation of its engagement is as follows: driven pulley (10) engaged transmission of the gear of rotor (8) and I level driving gear set, form the one-level reducing transmission structure, and I level speed reducing ratio is 54: 9=6: 1.The driving wheel (11) of II level driving gear set and II level driving gear set driven pulley (13) engaged transmission are formed the double reduction drive mechanism, and 2 grades of speed reducing ratio are 80: 8=10: 1.Because I level driving gear set driven pulley (10) is coaxial and be connected as a single entity with II level driving gear set driving wheel (11), therefore, when I level driven pulley rotates, drive II level driving wheel coaxial rotation simultaneously, form the interlock between I level transmission and the transmission of II level, because outer rotation axis (3) and coaxial linking to each other of II level driving gear set driven pulley (13) therefore, are input to pointer driving shaft (3) output from rotor (8) and form two-stage [(54 ÷ 9) * (80 ÷ 8)]: 1=60: 1 reducing gear train.
In outer shaft reduction gear device structure, outer shaft p-m rotor (22) is the motor of outer shaft reducing gear train, directly the field drives that is produced by the stator phase coil.Outer shaft p-m rotor (22) is 9 teeth, and outer shaft I level driving gear set driven pulley (24) is 54 teeth, and outer shaft II level driving gear set driving wheel (25) is 6 teeth, and outer shaft II level driving gear set driven pulley (27) is 80 teeth.The relation of its engagement is as follows: driven pulley (24) engaged transmission of the gear of rotor (22) and I level driving gear set, form the one-level reducing transmission structure, and I level speed reducing ratio is 54: 9=6: 1.The driving wheel (25) of II level driving gear set and II level driving gear set driven pulley (27) engaged transmission are formed the double reduction drive mechanism, and the double reduction ratio is 80: 6=40: 3.I level driving gear set driven pulley (24) is coaxial and be connected as a single entity with II level driving gear set driving wheel (25), therefore, when I level driven pulley rotates, drive II level driving wheel coaxial rotation simultaneously, form the interlock between I level transmission and the transmission of II level, because outer rotation axis (17) and coaxial linking to each other of II level driving gear set driven pulley (27), therefore, rotation axis (17) output forms two-stage [(54 ÷ 9) * (80 ÷ 6)] outside rotor (22) is input to: 1=80: 1 reducing gear train.
As can be seen, because speed reducing ratio of axle is less than the speed reducing ratio of outer shaft in it, therefore the speed that axle drive pointer rotates in can slightly drive the speed that pointer rotates faster than outer shaft, make the intrinsic step angle of inside and outside pointer rotation axis produce difference, the intrinsic step angle of wherein interior pointer rotation axis is (360 ° of ÷ 9)/60=2/3 °, and the intrinsic step angle of outer pointer rotation axis is (360 ° of ÷ 9)/80=1/2 °.Because inside and outside rotation axis is designed to asynchronous speed, thereby guarantees whenever inside and outside pointer rotation axis all can asynchronously rotate, and has reduced the resonance that brings when interior outer shaft rotates simultaneously effectively, and reduces the machinery and the electromagnetic noise of motor greatly, its meaning is obvious.
Axle stator core body (16) and outer shaft stator core body (30) are respectively the irregular ring bodies of a closure in described, and iron core is by three overlapping forming of permalloy plate.Two iron cores are arranged in the both sides of inside and outside rotation axis.What arranged in the left side is interior axle stator core body (16), what arranged on the right side is outer shaft stator core body (30), they are not in a plane, in the space, implement up and down staggered floor but its floor projection then is to put point-blank, make inside and outside phase coil group on distance, keep farthest, therefore mutual magnetic interference minimum.On interior axle iron core, two phase coils and support (14) are all by 90 ° of angles arrangements; On the outer shaft iron core, two phase coils and support (28) are also settled by 90 ° of angles, are mutually the corner symmetry.
Rotation axis (3) and the outer rotation axis (17) of pointer in the described pointer, structurally have following relation: interior rotation axis (3) be a stainless pin, and outer rotation axis (17) is a plastic sheath, outer rotary axle box on interior rotation axis, the interior rotation axis and the coaxial heart of outer rotation axis.Interior rotation axis is two separate root pointer driving shafts with outer rotation axis, can drive the two-way pointer simultaneously, shows the different physical quantity information of two-way.It is less that the twin shaft indicating structure makes the utility model can be applicable to volume, and require all kinds of digital instrumentations in the information display set.
Described stepper motor driving circuit pcb board (31) is encapsulated in the described electric machine casing, be welded with the motor special driving chip (32) of customization on this circuit board, this chip is 16 hem facing chip packages, IC includes six times of sub-driver circuits of the intrinsic step angle of two-way motor, can drive the two-way motor simultaneously.Because the intrinsic step angle of interior pointer rotation axis is (360 ° of ÷ 9)/60=2/3 °, the intrinsic step angle of outer pointer rotation axis is (360 ° of ÷ 9)/80=1/2 °, therefore, described motor step elongation is after chip (32) further segments, the micro-stepping of pointer rotation axis is (2/3) ° * 1/6=(1/9) ° in it, and the micro-stepping of outer pointer rotation axis is (1/2) ° * 1/6=(1/12) °, therefore two concentric dials can draw on a dial plate, scale indication in wherein interior pointer is used for, and outer pointer is used for the EXT scale indication.
The mode of connection of described motor and chip (32) is as follows: 16 pin chip (32) one road output pin (OUTA1 of special use on the driving PCB plate, OUTA2, OUTA3, OUTA4) the phase coil output pin (15) with interior axle is connected, another road output pin (OUTB1, OUTB2, OUTB3, OUTB4) be connected with the phase coil output pin (29) of outer shaft, with the corresponding chip input pin CWA of two-way output pin, FA, CWB, FB directly amplifies to the motor outside, respectively as interior direction of principal axis control pin (4), interior Shaft angle control pin (5), interior axle ground VSS (6), interior axle power vd D (7), outer direction of principal axis control pin (18), outer Shaft angle control pin (19), outer shaft ground VSS (20), outer shaft power vd D (21).Wherein, CWA, CWB input pin are used for the inside and outside axle of reception pointer direction of rotation control signal, FA, FB are used for the inside and outside axle of reception pointer anglec of rotation control signal.The ground pin (17) of the ground pin (6) of axle and motor outer shaft is connected to the VSS of chip jointly in the motor, the power pins (18) of the power pins (7) of axle and motor outer shaft is connected to the VDD of chip jointly in the motor, and these 4 pins are as the power supply input pin of motor.
During drive IC (32) work, chip for driving is by the control signal of CWA, FA and CWB and FB pin reception external microcontroller, after the processing of chip for driving internal circuit, eight output pins by OUTA1, OUTA2, OUTA3, OUTA4 and OUTB1, OUTB2, OUTB3, OUTB4 produce the accurately pulse train of control, axle and the corresponding periodically variable magnetic field of the interior generation of outer shaft phase coil in making, rotation axis and outer rotation axis are realized the micro-stepping rotation of six times of segmentations in promoting respectively on the basis of intrinsic step angle, smoothly rotate thereby drive pointer.
Compare with existing stepping motor for meter, the cross-compound arrangement shell of stepper motor is simultaneously displayed on two kinds of indicatrixs in the same instrument board in this programme, particularly its built-in micro-stepping segmentation that can drive simultaneously two-way drives chip (32), so that step motor control becomes completely simple, free drive moving concentric double-shaft stepper motor in this outside is specially adapted to the pointer control of miniature instrument, is conducive to the miniaturization of instrument and the centralized displaying of data.
Claims (6)
1. concentric double driving shafts stepping motor, the stator core body (16) (30), the drive circuit pcb board (31) that comprise outer casing upper cover (1), shell lower cover (2), interior outer shaft, it is characterized in that inside and outside rotation axis transfer gear train has corresponding with it I level, II level under drive gear group and two inside and outside rotation axiss.
2. concentric double driving shafts micro-step motor according to claim 1 is characterized in that, described outer casing upper cover (1), shell lower cover (2) adopt the snap-fitted structure.
3. concentric double driving shafts micro-step motor according to claim 1, it is characterized in that, stepping motor has interior rotation axis (3) and outer rotation axis (17), two rotation axiss are separate, interior rotation axis (3) and interior axle coaxial linking to each other of II level driving gear set driven pulley (13), outer rotation axis (17) and coaxial linking to each other of outer shaft II level driving gear set driven pulley (27), guarantee to drive rotation axis simultaneously when driven pulley rotates, wherein interior rotation axis (3) is a stainless pin, outer rotation axis (17) is a plastic sheath, outer rotation axis (17) is placed on the interior rotation axis (3), the interior rotation axis and the coaxial heart of outer rotation axis.
4. concentric double driving shafts micro-step motor according to claim 1, it is characterized in that, a built-in drive circuit pcb board (31), be welded with the IC chip (32) of 16 hem facing sheets encapsulation on the pcb board (31), road output pin (the OUTA1 of chip for driving IC (32), OUTA2, OUTA3, OUTA4) directly link to each other with axle stator field phase coil output pin (15) in the described motor, another road output pin (OUTB1, OUTB2, OUTB3, OUTB4) link to each other with the output pin (29) of outer shaft stator field phase coil, with the corresponding chip input pin CWA of two-way output pin, FA, CWB, FB directly leads to the motor outside, direction of principal axis control pin (4) in the leading foot of its motor is defined as respectively, interior Shaft angle control pin (5), interior axle ground VSS (6), interior axle power vd D (7), outer direction of principal axis control pin (18), outer Shaft angle control pin (19), outer shaft ground VSS (20), outer shaft power vd D (21).
5. rotation axis transfer gear train in according to claim 1, it is characterized in that, gear train is by interior axle p-m rotor (8), I level driving gear set driven pulley (10), II level driving gear set driving wheel (11), II level driving gear set driven pulley (13) is formed, an interior axle p-m rotor (8) is 9 teeth, with driven pulley (10) engagement that comprises axle I level driving gear set in 54 teeth, an interior axle II level driving gear set driving wheel (11) is 8 teeth, driven pulley (13) engagement with the interior axle II level driving gear set that comprises 80 teeth, the I level driving gear set driven pulley (10) that interior rotation axis under drive gear is is connected as a single entity with II level driving gear set driving wheel (11), the I level transmission of axle and the interlock between the transmission of II level in forming.
6. outer rotation axis transfer gear train according to claim 1, it is characterized in that, gear train is made up of outer shaft p-m rotor (22), outer shaft I level driving gear set driven pulley (24) and the outer shaft II level driving gear set driving wheel (25) that is connected as a single entity, outer shaft II level driving gear set driven pulley (27), outer shaft p-m rotor (22) is 9 teeth, with outer shaft I level driving gear set driven pulley (24) engagement that comprises 54 teeth; Outer shaft II level driving gear set driving wheel (25) is 6 teeth, with outer shaft II level driving gear set driven pulley (27) engagement that comprises 80 teeth, the driving wheel (25) of the driven pulley (24) of outer shaft I level driving gear set and outer shaft II level driving gear set is connected as a single entity, I level transmission that forms outer rotation axis under drive gear and be and the interlock between its II level transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920066109XU CN201536314U (en) | 2009-09-29 | 2009-09-29 | Concentric double-driving-shaft step motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920066109XU CN201536314U (en) | 2009-09-29 | 2009-09-29 | Concentric double-driving-shaft step motor |
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| Publication Number | Publication Date |
|---|---|
| CN201536314U true CN201536314U (en) | 2010-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920066109XU Expired - Fee Related CN201536314U (en) | 2009-09-29 | 2009-09-29 | Concentric double-driving-shaft step motor |
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| CN (1) | CN201536314U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976930A (en) * | 2010-10-08 | 2011-02-16 | 彭希南 | Concentric three-driving shaft micro stepping motor |
| CN107925278A (en) * | 2015-07-23 | 2018-04-17 | Mmt有限公司 | Compact motor retarder |
-
2009
- 2009-09-29 CN CN200920066109XU patent/CN201536314U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976930A (en) * | 2010-10-08 | 2011-02-16 | 彭希南 | Concentric three-driving shaft micro stepping motor |
| CN101976930B (en) * | 2010-10-08 | 2012-07-25 | 彭希南 | Concentric three-driving shaft micro stepping motor |
| CN107925278A (en) * | 2015-07-23 | 2018-04-17 | Mmt有限公司 | Compact motor retarder |
| EP3326263B1 (en) * | 2015-07-23 | 2020-07-22 | Mmt Sa | Compact motoreducer |
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Granted publication date: 20100728 Termination date: 20130929 |