CN220122749U - Counter electromotive force detection structure based on direct current brush motor shell - Google Patents
Counter electromotive force detection structure based on direct current brush motor shell Download PDFInfo
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- CN220122749U CN220122749U CN202321592439.9U CN202321592439U CN220122749U CN 220122749 U CN220122749 U CN 220122749U CN 202321592439 U CN202321592439 U CN 202321592439U CN 220122749 U CN220122749 U CN 220122749U
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- electromotive force
- housing
- detection structure
- rotor
- shell
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 230000006698 induction Effects 0.000 claims abstract description 29
- 238000009434 installation Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 238000000034 method Methods 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004832 voltammetry Methods 0.000 description 1
Abstract
The utility model discloses a back electromotive force detection structure based on a direct current brush motor shell, which relates to the field of motors and comprises the following components: the device comprises a shell, a stator, a rotor, an induction component and a connecting piece; the stator is fixed on the inner side of the shell; the rotor is arranged in a rotating way relative to the stator, the rotor can comprise a rotating shaft, a rotor iron core and a coil, the coil and the rotor iron core form a winding, and counter electromotive force is generated when the rotor rotates; the induction component is arranged outside the shell and is configured to induce back electromotive force of the rotor; the connecting piece even includes connecting portion and installation department, and connecting portion can dismantle with the casing and be connected, and the induction part is connected to the installation department. The back electromotive force detection structure based on the direct current brush motor shell can detachably install the induction component outside the motor without installing the induction component in manufacturing, and is convenient to use.
Description
Technical Field
The utility model relates to the field of motors, in particular to a back electromotive force detection structure based on a direct current brush motor shell.
Background
Detecting the magnitude of the back emf can help us to understand the operating state of the motor. In general, the back emf of a motor is proportional to the load of the motor, and as the load experienced by the motor increases, the back emf increases accordingly. The load condition of the motor can be judged by detecting the change of the back electromotive force, so that the output power of the motor is adjusted, and the normal operation of the motor is ensured. In addition, the counter electromotive force can be used for estimating parameters such as the rotating speed, the magnetic flux and the like of the motor, and has important effects on the control and the regulation of the motor.
In the related art, the back electromotive force of the direct current motor can be measured by adopting a voltage method and a voltammetry, and the voltage or current fluctuation signals led out by two terminals at the power supply end of the motor are detected by the two methods, but the fluctuation signals have a great relationship with the contact condition of a power supply brush and a commutator, and because the power supply brush is not very stable when being contacted with the commutator, the obtained fluctuation signals are easy to generate more clutters, and the accuracy of the detection result is influenced. Measuring the back electromotive force of a direct current motor can also use an induction coil or a hall element for induction, and the induction components are usually installed inside a motor shell when the motor is manufactured, and the detection result is more accurate but needs to be installed in advance; a motor that is manufactured without an inductive component cannot be detected in this way. The conventional treatment method is to install the induction component on the outer side of the motor shell, and the installation mode is usually glue adhesion, so that the induction component cannot be detached after installation, and the normal installation and use of the motor after detection are affected.
Disclosure of Invention
(one) solving the technical problems
The utility model provides a back electromotive force detection structure based on a direct current brush motor shell, which solves the technical problems that: how to detachably mount the induction component outside the motor without the induction component during manufacturing to detect the back electromotive force.
(II) technical scheme
In order to solve the technical problems, the utility model provides the following technical scheme:
a back emf detection structure based on a dc brushed motor housing, comprising:
a housing;
a stator fixed inside the housing;
the rotor is rotatably arranged relative to the stator;
an induction member disposed outside the housing and configured to induce a back electromotive force of the rotor;
the connecting piece comprises a connecting part and a mounting part, wherein the connecting part is detachably connected with the shell, and the mounting part is connected with the induction component.
In some embodiments, the connection has elastic deformability and comprises: the clamping ring is clamped on a protruding shaft at one end of the shell and is positioned on the protruding shaft along the radial direction of the protruding shaft; and the limiting hook is hooked at the other end of the shell.
In some embodiments, the snap ring is an elastic structure and is provided with an opening having a size smaller than the diameter of the male shaft, and the elastic structure is configured to nest within the male shaft through the opening upon elastic deformation.
In some embodiments, the limit hook comprises hook parts which are abutted against two opposite sides of the shell, and a hook groove clamped at the end part of the shell is formed between the hook parts.
In some embodiments, the mounting portion is located between the snap ring and the limit hook and is provided with a mounting groove for placing the sensing component, and the mounting portion further comprises a movable cover for covering the mounting groove.
In some embodiments, the mounting slot is provided with an opening disposed toward the housing, and the sensing component includes a sensing end that is positioned within the opening.
(III) beneficial effects
Compared with the prior art, the back electromotive force detection structure based on the direct current brush motor shell has the following beneficial effects:
when the back electromotive force detection structure based on the direct current brush motor shell works, the rotor rotates relative to the stator and generates back electromotive force, and the induction component induces the back electromotive force of the rotor, wherein the induction component is connected to the mounting part of the connecting piece, and meanwhile, the connecting piece is detachably connected with the shell through the connecting part.
Drawings
Fig. 1 is a front perspective view of a back electromotive force detection structure based on a direct current brush motor housing in an embodiment;
fig. 2 is a back perspective view of a back emf detection structure based on a dc brushed motor housing in an embodiment;
fig. 3 is an exploded view of a back emf detection structure based on a dc brushed motor housing in an embodiment.
Reference numerals: the rotor comprises a shell 1, a stator 2, a rotor 3, an induction component 4, a connecting piece 5, a protruding shaft 10, a connecting part 50, a mounting part 51, a clamping ring 501, a limiting hook 502, an opening 503, a hook part 504, a hook groove 505, a mounting groove 506, a movable cover 507 and an opening 508.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
In the related art, the back electromotive force of the direct current motor can be measured and sensed by using an induction coil or a hall element, and the induction components are usually installed inside a motor housing when the motor is manufactured, and although the detection result is more accurate, the detection result needs to be installed in advance; a motor that is manufactured without an inductive component cannot be detected in this way. The conventional treatment method is to install the induction component on the outer side of the motor shell, and the installation mode is usually glue adhesion, so that the induction component cannot be detached after installation, and the normal installation and use of the motor after detection are affected.
Referring to fig. 1, 2 and 3, fig. 1 is a front perspective view of a back emf detection structure based on a dc brushed motor housing in an embodiment, fig. 2 is a back perspective view of a back emf detection structure based on a dc brushed motor housing in an embodiment, and fig. 3 is an exploded view of a back emf detection structure based on a dc brushed motor housing in an embodiment.
The present embodiment provides a back electromotive force detection structure based on a direct current brush motor housing 1, including: a housing 1, a stator 2, a rotor 3, an inductive component 4 and a connection 5.
The above-mentioned casing 1 is equipped with protruding axle 10 in the one end of pivot output, and protruding axle 10 can be the structure on the casing 1, also can be the structure of other component parts of motor, is equipped with terminal surface and side in the one end that the terminal was inserted.
The stator 2 is fixed inside the housing 1.
The stator 2 may be a stator core, and may be fixed to the inside of the casing 1 by adhesion, fitting, or the like.
The rotor 3 is rotatably arranged relative to the stator 2.
The rotor 3 may include a shaft, a rotor core, and a coil, where the coil and the rotor 3 core form windings, and the number of windings is selected according to the type of the motor, and counter electromotive force is generated when the rotor 3 rotates.
The sensing member 4 is provided outside the housing 1 and configured to sense a counter electromotive force of the rotor 3.
The sensing component 4 may be a hall sensor or an induction coil, the sensing component 4 may face the gap of the stator core, and the sensing component 4 may be connected with a back electromotive force analysis device such as a micro motor detector, so as to image and digitize the back electromotive force.
The connecting piece 5 comprises a connecting part 50 and a mounting part 51, wherein the connecting part 50 is detachably connected with the shell 1, and the mounting part 51 is connected with the sensing component 4.
The connecting piece 5 may be an integral piece, or may be a structure in which the connecting portion 50 and the mounting portion 51 are separately connected, the connecting portion 50 may be detachably connected to the housing 1 by means of clamping or nesting, and the mounting portion 51 may be fixedly or detachably connected to the sensing member 4.
The counter electromotive force detection structure based on the brush motor housing 1 of direct current of above technical scheme during operation, rotor 3 rotates and produces counter electromotive force relative to stator 2, and induction part 4 responds to the counter electromotive force of rotor 3, wherein, induction part 4 connects on the installation department 51 of connecting piece 5, simultaneously, connecting piece 5 can dismantle with casing 1 through connecting portion 50, so, the counter electromotive force detection structure based on brush motor housing 1 of direct current of this embodiment can be with induction part 4 detachable install outside the motor of installation induction part 4 when making, and detect counter electromotive force, simultaneously, need not bonding induction part 4, convenient operation.
Referring to fig. 1 and 3, in one embodiment in which the connection portion 50 is detachably connected to the housing 1, the connection portion 50 includes: the clamping ring 501 and the limiting hook 502 are arranged on the convex shaft 10 at one end of the shell 1 in a clamping way, and are radially limited on the convex shaft 10 along the convex shaft 10; the limit hook 502 is hooked to the other end of the housing 1. In this embodiment, two ends of the connecting portion 50 are connected to two ends of the housing 1 through the snap ring 501 and the limiting hook 502, and the snap ring 501 and the limiting hook 502 are designed according to the structures of two ends of the housing 1, so that the snap ring 501 can be transversely limited on the protruding shaft 10 and axially limited at the end of the housing 1.
Referring to fig. 3, in order to facilitate the snap ring 501 entering the protruding shaft 10, the snap ring 501 is of an elastic structure, such as made of elastic plastic, the snap ring 501 is provided with an opening 503, the size of the opening 503 is smaller than the diameter of the protruding shaft 10, and the elastic structure is configured to be sleeved into the protruding shaft 10 through the opening 503 when the elastic structure is elastically deformed. So, snap ring 501 can make opening 503 open through elastic deformation when spacing hook 502 hook is on casing 1, and then block into protruding axle 10, and can automatic re-setting accomplish fixedly after the card is gone into, also can realize dismantling through opening 503 elastic deformation under spacing hook 502 hook state when pulling down, easy dismounting.
Referring to fig. 2 and 3, in one embodiment of the limit hook 502 being hooked on the housing 1, the limit hook 502 includes two hook portions 504 respectively abutted against opposite sides of the housing 1, and a hook groove 505 clamped at an end of the housing 1 is formed between the hook portions 504; the limiting hook 502 may be an elastic structure and can be deformed appropriately. In this embodiment, the limiting hooks 502 can be laterally limited at the end of the housing 1 through the hook portions 504, axially limited in the hook grooves 505, tightly connected, and not easy to shake.
Referring to fig. 1 and 3, in one embodiment in which the mounting portion 51 is connected to the sensing member 4, the mounting portion 51 is located between the snap ring 501 and the limit hook 502, and is provided with a mounting groove 506 in which the sensing member 4 is placed, and the mounting portion 51 further includes a movable cover 507 for covering the mounting groove 506; the size of the installation groove 506 may be slightly larger than the size of the sensing component 4, the shape of the installation groove 506 is the same as that of the sensing component 4, the sensing component 4 is fixed in the installation groove 506 in a clamping manner, one end of the movable cover 507 may be rotatably connected to the outer side of a groove wall of the installation groove 506 through a shaft or hinge structure, and the other end of the movable cover 507 is connected to the inner side of the opposite groove wall of the installation groove 506 through a buckle. In this embodiment, the sensing member 4 may be mounted in the mounting groove 506 and is limited by the movable cover 507, thereby being convenient to install. The groove wall of the mounting groove 506 may be provided with a relief hole, so that the output end of the sensing component such as the hall sensor can be connected out.
Referring to fig. 1 and 3, in order to enhance the sensitivity of the sensing element 4 to the back emf of the rotor 3, the mounting groove 506 is provided with an opening 508 disposed toward the housing 1, and the sensing element 4 includes a sensing end disposed within the opening 508. Thus, the sensing end of the sensing component 4 is not shielded by the connecting piece 5 through the opening 508, and the sensing capability of the sensing component 4 to counter electromotive force is improved. Of course, when the sensing sensitivity of the sensing component 4 is high, the housing 1 may be alternatively provided with no opening 508, so as to reduce the manufacturing difficulty.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A back electromotive force detection structure based on a direct current brush motor housing, comprising:
a housing;
a stator fixed inside the housing;
the rotor is rotatably arranged relative to the stator;
an induction member disposed outside the housing and configured to induce a back electromotive force of the rotor;
the connecting piece comprises a connecting part and a mounting part, wherein the connecting part is detachably connected with the shell, and the mounting part is connected with the induction component.
2. The back emf detection structure of claim 1, wherein the connection portion has elastic deformability and comprises:
the clamping ring is clamped on a protruding shaft at one end of the shell and is positioned on the protruding shaft along the radial direction of the protruding shaft;
and the limiting hook is hooked at the other end of the shell.
3. The back emf detection structure of claim 2, wherein the snap ring is an elastic structure and has an opening, the opening is smaller than the diameter of the protruding shaft, and the elastic structure is configured to nest into the protruding shaft through the opening when elastically deformed.
4. The back electromotive force detection structure based on a direct current brushed motor housing according to claim 2, wherein the limit hooks comprise hooks which are abutted against opposite sides of the housing, and hook grooves which are clamped at the end parts of the housing are formed between the hooks.
5. The back electromotive force detection structure based on a direct current brush motor housing according to claim 2, wherein the mounting part is located between the snap ring and the limit hook, and is provided with a mounting groove in which the sensing member is placed, and the mounting part further includes a movable cover for covering the mounting groove.
6. The back emf detection structure of claim 5, wherein the mounting slot is provided with an opening disposed toward the housing, and the sensing member includes a sensing end disposed within the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321592439.9U CN220122749U (en) | 2023-06-21 | 2023-06-21 | Counter electromotive force detection structure based on direct current brush motor shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321592439.9U CN220122749U (en) | 2023-06-21 | 2023-06-21 | Counter electromotive force detection structure based on direct current brush motor shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220122749U true CN220122749U (en) | 2023-12-01 |
Family
ID=88888238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321592439.9U Active CN220122749U (en) | 2023-06-21 | 2023-06-21 | Counter electromotive force detection structure based on direct current brush motor shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220122749U (en) |
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2023
- 2023-06-21 CN CN202321592439.9U patent/CN220122749U/en active Active
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