CN110601455A - Positioning device of stepping motor - Google Patents
Positioning device of stepping motor Download PDFInfo
- Publication number
- CN110601455A CN110601455A CN201910941620.8A CN201910941620A CN110601455A CN 110601455 A CN110601455 A CN 110601455A CN 201910941620 A CN201910941620 A CN 201910941620A CN 110601455 A CN110601455 A CN 110601455A
- Authority
- CN
- China
- Prior art keywords
- stepping motor
- shell
- driven gear
- sensor
- sensor shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/22—Optical devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/24—Structural association with auxiliary mechanical devices
Abstract
The invention discloses a positioning device of a stepping motor, which mainly relates to the technical field of positioning devices and comprises a shell unit and a positioning unit, wherein the shell unit is arranged at the periphery of the positioning unit, and the positioning unit is arranged on the stepping motor and is used for determining the zero point of a single circle and the zero point of a stroke of the stepping motor and resetting the two zero points. According to the invention, the positioning device is arranged on the stepping motor, and the infrared transmitting tube fixed on the circuit board of the sensor shell is adopted to emit light, the infrared receiving tube is adopted to sense light, and the gear and the special disc are matched to rotate to position and reset the zero point of the single circle and the zero point of the stroke of the motor, so that the structure can effectively reduce the positioning error and has high positioning precision; the shell seals are arranged outside the positioning pieces, so that the positioning pieces are not influenced by the outside and do not need maintenance; the negative direction has a half-turn allowance; the volume is small.
Description
Technical Field
The invention relates to a positioning device, in particular to a positioning device of a stepping motor for a scanner.
Background
Most of the existing stepping motors are not provided with positioning devices, and only the positioning devices are arranged on moving parts to carry out zero point and stroke positioning, so that errors easily occur in the positioning mode, the positioning devices which are used for accurately determining the zero point and the stroke positioning of the stepping motors are not applicable to some precise instruments and equipment, and the positioning devices which can be directly arranged on the stepping motors need to be designed to meet the actual use requirements.
Disclosure of Invention
The invention provides a positioning device of a stepping motor with a simple structure, which solves the problem of lack of a motor positioning device in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the positioning device comprises a shell unit and a positioning unit, wherein the shell unit is arranged on the periphery of the positioning unit, and the positioning unit is arranged on the stepping motor and is used for determining the single-circle zero point and the stroke zero point of the stepping motor and resetting the two zero points.
Preferably, the shell unit comprises a circuit board shell, a first sensor shell and a second sensor shell, the circuit board shell is arranged above the stepping motor, the first sensor shell and the second sensor shell are both located below the circuit board shell, a first sensor shell round hole, a second sensor shell round hole and a third sensor shell round hole are formed in the first sensor shell, the second sensor shell is arranged in front of the first sensor shell, and a stepping motor shaft sequentially penetrates through the first sensor shell and the second sensor shell and extends out.
Preferably, the positioning unit comprises a circuit board, a sensor group, a gear set and a disc, the circuit board is arranged above the stepping motor and located in a circuit board shell, the sensor group is arranged on the circuit board, the gear set comprises a stepping motor shaft gear, a first driven gear and a second driven gear, the stepping motor shaft gear is arranged on a stepping motor shaft, the first driven gear and the second driven gear are both arranged on the first sensor shell, the first driven gear and the second driven gear are meshed with the stepping motor shaft gear simultaneously, the disc is arranged on the stepping motor shaft and located in front of the stepping motor shaft gear, the first driven gear and the second driven gear, and the disc is composed of two semicircles with different diameters.
Preferably, the sensor group comprises a first sensor and two second sensors, the first sensor comprises a first infrared transmitting tube and a first infrared receiving tube, the second sensor comprises a second infrared transmitting tube and a second infrared receiving tube, the first infrared transmitting tube and the second infrared transmitting tube are arranged in a second sensor shell, the first infrared receiving tube and the second infrared receiving tube are arranged in the first sensor shell, the first infrared transmitting tube and the first infrared receiving tube are arranged in opposite directions, and the second infrared transmitting tube and the second infrared receiving tube are arranged in opposite directions respectively.
Preferably, the number of teeth of the stepping motor shaft gear, the first driven gear and the second driven gear is 11, 12 and 13, respectively.
Preferably, the first driven gear is provided with a round hole of the first driven gear which is through and close to the edge, and the second driven gear is provided with a round hole of the second driven gear which is through and close to the edge.
Preferably, a first transition edge and a second transition edge which are symmetrical are arranged on the outer side of the junction of the two semicircles on the disc, a first disc hole and a second disc hole are respectively arranged on the two different semicircles of the disc, the first disc hole, the first driven gear round hole and the first sensor shell round hole correspond to each other, and the second disc hole, the second driven gear round hole and the third sensor shell round hole correspond to each other.
Preferably, the disc is made of black opaque materials, the first sensor shell and the second sensor shell are made of black opaque materials, the gear of the stepping motor shaft is made of wear-resistant materials, and the first driven gear and the second driven gear are made of black opaque materials.
The invention adopts the structure and has the following advantages: the positioning device is arranged on the stepping motor, and the infrared transmitting tube fixed on the circuit board of the sensor shell emits light, the infrared receiving tube induces light and is matched with the gear and the special disc to rotate to position and reset the single-circle zero point and the stroke zero point of the motor, so that the structure can effectively reduce the positioning error and has high positioning precision; the shell seals are arranged outside the positioning pieces, so that the positioning pieces are not influenced by the outside and do not need maintenance; the negative direction has a half-turn allowance; the volume is small.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of the present invention with the circuit board housing and the sensor housing removed;
FIG. 3 is a schematic perspective view of the present invention with the circuit board housing, the second sensor housing, the circuit board and the disk removed;
FIG. 4 is a schematic perspective view of the present invention with the circuit board housing, the second sensor housing, the first driven gear, the second driven gear and the disk removed;
FIG. 5 is an enlarged elevation view of the disc;
fig. 6 is an enlarged perspective view of the first sensor housing.
In the figure, 1, a circuit board housing; 2. a stepping motor; 3. a first sensor shell; 4. a second sensor shell; 5. a circuit board; 6. a first infrared emission tube; 7. a second infrared emission tube; 8. a disc; 9. a stepper motor shaft; 10. a stepper motor shaft gear; 11. a first driven gear; 12. a driven gear II; 13. a second circular hole of the driven gear; 14. a first round hole of the sensor shell; 15. a circular hole of the driven gear; 16. a first disc hole; 17. a second disc hole; 18. a first infrared receiving tube; 19. a second infrared receiving tube; 20. a first transition edge; 21. a second round hole of the sensor shell; 22. a sensor shell is provided with a circular hole III; 23. and a second transition edge.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1, the whole body comprises a shell unit and a positioning unit, the shell unit is arranged at the periphery of the positioning unit, the shell unit comprises a circuit board shell 1, a sensor shell I3 and a sensor shell II 4, the circuit board shell 1 is arranged above a stepping motor 2, the sensor shell I3 and the sensor shell II 4 are both arranged below the circuit board shell 1, as shown in fig. 6, a sensor shell I round hole I14, a sensor shell I round hole II 21 and a sensor shell I round hole III 22 are arranged on the sensor shell I3, the sensor shell II 4 is arranged in front of the sensor shell I3, a stepping motor shaft 9 sequentially penetrates through and extends out of the sensor shell I3 and the sensor shell II 4, and the positioning unit is arranged on the stepping motor 2 and used for determining a single-turn zero point and a stroke zero point of the stepping motor 2 and resetting the two zero points, as shown in fig. 2 and 3, the positioning unit comprises a circuit board 5, a sensor group, A gear set and a disk 8, wherein the circuit board 5 is arranged above the stepping motor 2 and positioned in the circuit board shell 1, as shown in fig. 4, the sensor set is arranged on the circuit board 5, the sensor comprises a first sensor and two second sensors, the first sensor comprises a first infrared transmitting tube 6 and a first infrared receiving tube 18, the second sensor comprises a second infrared transmitting tube 7 and a second infrared receiving tube 19, the first infrared transmitting tube 6 and the second infrared transmitting tube 7 are arranged in the second sensor shell 4, the first infrared receiving tube 18 and the second infrared receiving tube 19 are arranged in the first sensor shell 3, the first infrared transmitting tube 6 and the first infrared receiving tube 18 are oppositely arranged, the two second infrared transmitting tubes 7 and the two second infrared receiving tubes 19 are oppositely arranged respectively, the gear set comprises a stepping motor shaft gear 10, a first driven gear 11 and a second driven gear 12, the stepping motor shaft gear 10 is arranged on the stepping motor shaft 9, the first driven gear 11 and the second driven gear 12 are both arranged on the first sensor shell 3, the first driven gear 11 and the second driven gear 12 are simultaneously meshed with the first stepping motor shaft gear 10, as shown in fig. 3, a first through driven gear round hole 15 is arranged at the edge of the first driven gear 11, a second through driven gear round hole 13 is arranged at the edge of the second driven gear 12, the numbers of teeth of the first stepping motor shaft gear 10, the first driven gear 11 and the second driven gear 12 are respectively 11, 12 and 13, as shown in fig. 2, the disc 8 is arranged on the stepping motor shaft 9 and is positioned in front of the first stepping motor shaft gear 10, the first driven gear 11 and the second driven gear 12, as shown in fig. 5, the disc 8 is composed of two semicircles with different diameters, a first transition edge 20 and a second transition edge 23 are symmetrically arranged on the outer side of the junction of the two semicircles on the disc 8, a first disc hole 16 and a second disc hole 17 are respectively arranged, the disc hole I16, the driven gear round hole 15 and the sensor shell round hole II 21 correspond to each other, the disc hole II 17, the driven gear round hole II 13 and the sensor shell round hole III 22 correspond to each other, the disc 8 is made of black light-tight materials, the sensor shell I3 and the sensor shell II 4 are made of black light-tight materials, the stepping motor shaft gear 10 is made of wear-resistant materials, and the driven gear I11 and the driven gear II 12 are made of black light-tight materials.
The positioning of the stepping motor 2 comprises the positioning of a single-turn zero point and the positioning of a stroke zero point, the single-turn zero point and the stroke zero point are reset through a positioning unit, the resetting process is to find the single-turn zero point and then find the stroke zero point, the single-turn zero point is a zero point position reached within one turn (360 degrees) of the stepping motor 2, and the stroke zero point is a position reached within the whole stroke of the stepping motor 2 for completing tasks;
the method comprises the steps that a stepping motor 2 which rotates for one circle (360 degrees) is selected to have a stroke of 200 steps, the single-circle stroke of the stepping motor 2 is 360 degrees, the single-circle stroke range is-180 degrees to +180 degrees, when the stepping motor 2 is in an initial state, the single-circle zero point and the stroke zero point are both located at initial positions, namely a first disk hole 16, a first driven gear round hole 15 and a second sensor shell round hole 21 are aligned, a second disk hole 17, a second driven gear round hole 13 and a third sensor shell round hole 22 are aligned, meanwhile, a first transition edge 20 and a second transition edge 23 on a disc 8 are vertical, wherein the first transition edge 20 is located at the upper end, the first sensor shell round hole 14 is opposite to the first transition edge 20 at the upper end, the disc 8 is black in whole and is opaque, and the place outside the disc 8 is regarded as transparent;
the single-turn zero-point reset is realized in two directions: clockwise rotation and anticlockwise rotation, after step motor 2 begins to work, start sensor one, infrared emission pipe 6 is in the transmission state this moment, infrared receiving tube 18 is in the receiving state, step motor shaft 9 begins to drive step motor shaft gear 10 and disc 8 and rotates, if disc 8 small radius semicircle is located the top, also be located sensor shell round hole one 14 the place ahead, disc 8 can't shelter from the infrared ray, the infrared ray that infrared emission pipe one 6 sent is received by infrared receiving tube one 18 through disc 8 and sensor shell round hole one 14, step motor shaft 9 drives disc 8 synchronous clockwise rotation, until disc 8 transition limit one 20 just crosses sensor shell round hole one 14 department, the infrared ray that infrared emission pipe one 6 sent is sheltered from by disc 8, can't be received by infrared receiving tube one 18, step motor shaft 9 will rotate clockwise again according to the settlement of procedure to disc 8 transition limit one 20 just in time and pass to the transition limit one of disc 8 just in time A first sensor shell round hole 14, namely a first transition edge 20 of the disc 8 is vertical and is just positioned at a position from non-light transmission to light transmission of infrared rays emitted by a first infrared emission tube 6, a stepping motor shaft 9 stops rotating immediately, and a single-turn zero point of the stepping motor 2 is reset; if the large-radius semicircle of the disc 8 is positioned above the first round hole 14 of the sensor shell, the infrared rays emitted by the first infrared emitting tube 6 are shielded by the disc 8 and cannot be received by the first infrared receiving tube 18, the stepping motor shaft 9 drives the disc 8 to synchronously rotate anticlockwise until the first transition edge 20 of the disc 8 just rotates to the first round hole 14 of the sensor shell, namely the first transition edge 20 of the disc 8 is vertical and just positioned at the position where the infrared rays emitted by the first infrared emitting tube 6 are not transmitted to be transmitted, the stepping motor shaft 9 immediately stops rotating, and the stepping motor 2 resets at a zero point of a single turn;
when the first disk hole 16, the first driven gear round hole 15 and the second sensor shell round hole 21 are aligned, the second disk hole 17, the second driven gear round hole 13 and the third sensor shell round hole 22 are aligned, infrared rays emitted by the second infrared emitting tubes 7 are respectively received by the second infrared receiving tubes 19, and the position is the stroke zero point;
the formula from the alignment of the first round disc hole 16, the first round hole 15 of the driven gear and the second round hole 21 of the sensor shell and the alignment of the third round disc hole 17, the second round hole 13 of the driven gear and the third round hole 22 of the sensor shell to the next simultaneous alignment is as follows: the product of the number of teeth of the stepping motor shaft gear 10, the number of teeth of the driven gear one 11 and the number of teeth of the driven gear two 12 (the product of the least common multiple of the number of teeth of the three gears) is divided by the number of teeth of the stepping motor shaft gear 10, that is, (11 × 12 × 13) ÷ 11 ═ 156 (circles), when the stepping motor shaft 9 rotates < 156 circles, the corresponding positions of the first disk hole 16, the first driven gear round hole 15, the first sensor housing round hole two 21, the second disk hole two 17, the second driven gear round hole 13 and the first sensor housing round hole three 22 are different and are not aligned, infrared rays emitted by the two infrared emitting tubes two 7 cannot reach the two infrared receiving tubes two 19, that is, a reset stroke zero point does not exist, 156 × 360 ° +56160 °, that is, an angle required to rotate from one stroke zero point to reach the other stroke is +56160 °, a total stroke < +56160 ° can return to the current stroke zero point, and if the total stroke is +56160 °, a next stroke zero point can, the entire stroke cannot exceed +56160 °;
the method is characterized in that the zero reset of a single circle is executed before the zero reset of the stroke is executed through the setting of a computer program, and the positive direction limit of the available stroke is as follows: 0 ° < limit < +55980 ° (+56160 ° -180 ° +55980 °, minus 180 ° due to the fact that performing a single-turn zero-reset in the range +55980 ° to +56160 ° would reach +56160 °), negative directional limit: 0 ° > limit > -180 ° (0 ° -180 °, minus 180 ° due to the fact that a single-turn zero-reset performed at 0 ° to-180 ° would reach 0 °), a total stroke of 56160 °, and a total stroke in the range of-180 ° to +55980 °.
The above sensor group and gear group are prior art.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (8)
1. A positioning device of a stepping motor is characterized in that: the positioning device comprises a shell unit and a positioning unit, wherein the shell unit is arranged on the periphery of the positioning unit, and the positioning unit is arranged on the stepping motor and is used for determining the zero point of a single circle and the zero point of a stroke of the stepping motor and resetting the two zero points.
2. The positioning device of a stepping motor according to claim 1, wherein: the shell unit comprises a circuit board shell, a first sensor shell and a second sensor shell, wherein the circuit board shell is arranged above the stepping motor, the first sensor shell and the second sensor shell are both located below the circuit board shell, the first sensor shell is provided with a first sensor shell round hole, a second sensor shell round hole and a third sensor shell round hole, the second sensor shell is arranged in front of the first sensor shell, and a stepping motor shaft sequentially penetrates through the first sensor shell and the second sensor shell and extends out.
3. The positioning device of a stepping motor according to claim 2, wherein: the positioning unit comprises a circuit board, a sensor group, a gear set and a disc, wherein the circuit board is arranged above the stepping motor and is positioned in the circuit board shell, the sensor group is arranged on the circuit board, the gear set comprises a stepping motor shaft gear, a driven gear I and a driven gear II, the stepping motor shaft gear is arranged on the stepping motor shaft, the driven gear I and the driven gear II are both arranged on the sensor shell I, the driven gear I and the driven gear II are simultaneously meshed with the stepping motor shaft gear, the disc is arranged on the stepping motor shaft and is positioned in front of the stepping motor shaft gear, the driven gear I and the driven gear II, and the disc is formed by semicircles of two different diameters.
4. The positioning device of a stepping motor according to claim 3, wherein: the sensor group include sensor one and two sensor two, sensor one include infrared emission pipe one and infrared ray receiver tube one, sensor two include infrared emission pipe two and infrared ray receiver tube two, infrared emission pipe one and two infrared emission pipe two set up sensor shell two in, infrared ray receiver tube one and two infrared ray receiver tube two set up and be in sensor shell one in, infrared emission pipe one with infrared ray receiver tube one set up in opposite directions, two infrared emission pipe two with two infrared ray receiver tube two set up in opposite directions respectively.
5. The positioning device of a stepping motor according to claim 4, wherein: the number of teeth of the stepping motor shaft gear, the driven gear I and the driven gear II is 11, 12 and 13 respectively.
6. The positioning device of a stepping motor according to claim 5, wherein: the first driven gear is provided with a first through driven gear round hole close to the edge, and the second driven gear is provided with a second through driven gear round hole close to the edge.
7. The positioning device of a stepping motor according to claim 6, wherein: the sensor shell comprises a disc, a sensor shell and a disc hole I, wherein the disc is provided with a first transition edge and a second transition edge which are symmetrical at the outer side of the junction of two semicircles, the disc is provided with a disc hole I and a disc hole II on two different semicircles respectively, the disc hole I, a circular hole of a driven gear and the circular hole II of the sensor shell correspond to each other, and the disc hole II, the circular hole of the driven gear and the circular hole III of the sensor shell correspond to each other.
8. The positioning device of a stepping motor according to claim 7, wherein: the disc adopts black opaque material, sensor shell one and sensor shell two all adopt black opaque material, step motor shaft gear adopt wear-resisting material, driven gear one and driven gear two all adopt black opaque material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941620.8A CN110601455A (en) | 2019-09-30 | 2019-09-30 | Positioning device of stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941620.8A CN110601455A (en) | 2019-09-30 | 2019-09-30 | Positioning device of stepping motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110601455A true CN110601455A (en) | 2019-12-20 |
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ID=68865208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910941620.8A Pending CN110601455A (en) | 2019-09-30 | 2019-09-30 | Positioning device of stepping motor |
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| Country | Link |
|---|---|
| CN (1) | CN110601455A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526506A (en) * | 2022-02-24 | 2022-05-24 | 杭州老板电器股份有限公司 | Range hood and control method |
-
2019
- 2019-09-30 CN CN201910941620.8A patent/CN110601455A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526506A (en) * | 2022-02-24 | 2022-05-24 | 杭州老板电器股份有限公司 | Range hood and control method |
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