CN217002868U - Closed electromagnetic damper - Google Patents
Closed electromagnetic damper Download PDFInfo
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- CN217002868U CN217002868U CN202121422071.2U CN202121422071U CN217002868U CN 217002868 U CN217002868 U CN 217002868U CN 202121422071 U CN202121422071 U CN 202121422071U CN 217002868 U CN217002868 U CN 217002868U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 56
- 238000013016 damping Methods 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 26
- 210000003205 muscle Anatomy 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009987 spinning Methods 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a closed electromagnetic damper, which comprises a stator component, a middle shaft and an inner rotor component, wherein the stator component is provided with a central shaft and a central shaft; the stator assembly comprises a stator core, a coil and a first transmission piece, the stator core is fixed on the middle shaft, the coil is wound on the stator core, and the first transmission piece is arranged on the stator core; the inner rotor assembly comprises a shell, a damping steel sheet and a second transmission piece, the shell is rotationally arranged on the middle shaft, the shell is provided with a closed installation cavity, the stator assembly is located in the installation cavity, the damping steel sheet is fixedly arranged in the installation cavity around the stator assembly, the second transmission piece is arranged on the middle shaft, and a magnetic field generated by the stator assembly acts on the damping steel sheet to enable the shell to generate a resistance moment and transmits the resistance to the second transmission piece through the first transmission piece. Compared with an open damper, the utility model has the advantages of high assembly precision, small deviation of resistance value, small integral volume and compact structure.
Description
Technical Field
The utility model relates to the technical field of fitness equipment, in particular to a closed electromagnetic damper.
Background
Body-building apparatus (such as spinning, stair machine, climbing machine etc.) is at the during operation, need provide resistance strength load through the attenuator, take spinning as an example, after people's foot exerted the power to pedal, pedal through the rotation of crank drive belt pulley, the belt pulley drives metal flywheel through the belt again and rotates to the motion process of simulation bicycle reaches the purpose of body-building, and the speed of flywheel motion speed is then adjusted through the resistance moment that the attenuator provided. When the spinning works, the flywheel is driven to rotate, at the moment, the damper is electrified to generate an electromagnetic field, the moving flywheel generates an eddy current and generates an eddy magnetic field under the action of the electromagnetic field, the flywheel and the damper generate magnetic hysteresis under the interaction of the two magnetic fields to block the movement of the flywheel, namely, the damper provides braking damping, so that the flywheel generates a braking effect, and the magnitude of the braking damping can be adjusted by adjusting the magnitude of the current of the damper, thereby providing different resistance force loads for different users during body building.
The existing damper of the fitness equipment, such as the damper with the application number of 201921118934.X named as the eddy current damping generator for the fitness equipment, is mostly designed in an open mode by adopting a damping wheel and an electromagnet, and the damper with the structure has the defects of low assembly precision, large deviation of resistance value of a product, large volume, non-compact structure and the like.
Meanwhile, because the damper is designed in an open mode, the main transmission structure is exposed out and is not dustproof, and faults are easy to occur when the fitness equipment is used, so that the gear ratio of the open damper cannot be increased by using a gear structure, and the damper is small in output resistance value under the condition of the same current.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a closed electromagnetic damper with high assembly precision and compact structure.
In order to realize the purpose, the utility model adopts the following technical scheme:
a closed electromagnetic damper comprises a stator component, a middle shaft and an inner rotor component;
the stator assembly comprises a stator core, a coil and a first transmission piece, the stator core is fixed on the middle shaft, the coil is wound on the stator core, and the first transmission piece is arranged on the stator core;
the inner rotor assembly comprises a shell, a damping steel sheet and a second transmission piece, wherein the shell is rotationally arranged on the central shaft, the shell is provided with a closed installation cavity, the stator assembly is located in the installation cavity, the damping steel sheet is fixedly arranged in the installation cavity around the stator assembly, the second transmission piece is arranged on the central shaft, and a magnetic field generated by the stator assembly acts on the damping steel sheet to enable the shell to generate a resistance moment and transmit the resistance to the second transmission piece through the first transmission piece.
Preferably, the first transmission member includes a gear shaft, a first planetary gear and a second planetary gear, the gear shaft is rotatably inserted into the stator core, the first planetary gear and the second planetary gear are respectively installed at two ends of the gear shaft, the first planetary gear is in transmission connection with the housing, and the second planetary gear is in transmission connection with the second transmission member.
Preferably, the stator core is provided with three or more gear shafts through a first bearing, the gear shafts are distributed on the same circumference at equal angles, and the two ends of each gear shaft are respectively provided with the first planetary gear and the second planetary gear.
Preferably, the second transmission member includes an inner gear ring and a pulley portion, the inner gear ring is located in the mounting cavity and engaged with the second planetary gear, the pulley portion is disposed on a side edge of the inner gear ring, and the pulley portion is mounted on the central shaft through a second bearing.
Preferably, the inner rotor subassembly still includes sun gear, the shell includes left frame and right frame, left side frame pass through the third bearing install in on the axis, right side frame pass through the fourth bearing install in on the band pulley portion, right side frame is equipped with the opening towards the side the installation cavity, left side frame is together fixed with right frame detachably, in order to incite somebody to action the installation cavity is sealed, sun gear set up in left side frame, and with first planetary gear meshes mutually.
Preferably, the left frame protrudes towards the side edge to form a first convex ring, the damping steel sheet is accommodated in the installation cavity, the left frame and the right frame are locked through bolts, and the damping steel sheet is stopped and jacked in the installation cavity by the first convex ring.
Preferably, the inner wall of installation cavity is provided with first only commentaries on classics muscle, the outer wall of damping steel sheet is provided with first only commentaries on classics groove, the outer wall of first bulge loop is provided with the second only commentaries on classics groove, first only commentaries on classics groove and second only commentaries on classics groove with first only commentaries on classics muscle looks adaptation.
Preferably, the left frame is formed with the second bulge loop toward its side protrusion, the outer wall of second bulge loop is provided with the second and ends the commentaries on classics muscle, the inner wall of sun gear is provided with the third and ends the commentaries on classics groove, the third ends commentaries on classics groove and second and ends commentaries on classics muscle looks adaptation.
Preferably, the control plate is fixedly arranged on the stator core, the control plate is connected with the coil through a power line, an axial hole is formed in the middle shaft, a control line penetrates through the axial hole, and the control line extends through the middle shaft along the axial hole and then is connected with the control plate.
Preferably, a sensor is arranged on the control board, and an inductive object corresponding to the sensor is arranged on the second transmission part.
After adopting the technical scheme, compared with the background technology, the utility model has the following advantages:
1. the utility model installs the stator module in the outer cover, the damping steel sheet is fixed around the stator module in the installation cavity of the outer cover, the magnetic field generated by the stator module acts on the damping steel sheet, so that the outer cover generates resistance moment, the resistance is transmitted to the second transmission piece through the first transmission piece on the stator core, and then the resistance is brought to the movement of the body builder through the second transmission piece.
2. The first planetary gear and the second planetary gear of the first transmission piece, the inner gear ring of the second transmission piece and the sun gear are all arranged in the shell in a closed mode, and the gear ratio of the damper can be increased through a gear structure, so that the output resistance value of the damper is larger under the condition of the same current.
3. According to the damper, the stator core is fixed on the middle shaft, the damping steel sheet is arranged in the right frame through the matching of the first rotation stopping groove and the first rotation stopping rib, the sun gear is arranged in the left frame through the matching of the third rotation stopping groove and the second rotation stopping rib, and the left frame is arranged on the right frame through the matching of the second rotation stopping groove and the first rotation stopping rib, so that the assembly precision of the damper is further improved, and the deviation of a resistance value is reduced.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a second exploded view of the present invention;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is a perspective view of the stator assembly (with the coils omitted);
FIG. 6 is an exploded view of FIG. 5;
FIG. 7 is one of the exploded schematic views of the inner rotor assembly (partial structure);
fig. 8 is a second exploded view of the inner rotor assembly (partial structure).
Description of reference numerals:
the stator assembly 100, the stator core 110, the coil 120, the first transmission 130, the gear shaft 131, the first planetary gear 132, the second planetary gear 133, and the first bearing 134;
a middle shaft 200;
the device comprises a left frame 310, a first convex ring 311, a second rotation stopping groove 3111, a second convex ring 312, a second rotation stopping rib 3121, a right frame 320, a first rotation stopping rib 321, a damping steel sheet 330, a first rotation stopping groove 331, a second transmission part 340, an inner gear ring 341, a belt wheel part 342, a second bearing 350, a sun gear 360, a third rotation stopping groove 361, a third bearing 370 and a fourth bearing 380;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.
In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the apparatus or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.
Examples
Referring to fig. 1 and 2, the present invention discloses a closed electromagnetic damper, which includes a stator assembly 100, a middle shaft 200, an inner rotor assembly, and a control plate 400.
The stator assembly 100 includes a stator core 110, a coil 120 and a first transmission member 130, the stator core 110 is fixed to the middle shaft 200, the coil 120 is wound on the stator core 110, and the first transmission member 130 is disposed on the stator core 110. In this embodiment, the stator core 110 is formed by stacking a plurality of silicon steel sheets, and the silicon steel sheets are formed by fine blanking with a precision die, so that the dimensional accuracy of each silicon steel sheet is high, the assembly gap of each silicon steel sheet is very accurate, and the generated resistance fluctuation is ensured to be small.
As shown in fig. 2 to 6, the first transmission member 130 includes a gear shaft 131, a first planetary gear 132 and a second planetary gear 133, the gear shaft 131 is rotatably inserted into the stator core 110, the first planetary gear 132 and the second planetary gear 133 are respectively mounted at two ends of the gear shaft 131, the first planetary gear 132 is in transmission connection with the housing, and the second planetary gear 133 is in transmission connection with the second transmission member 340.
The stator core 110 is mounted with three or more gear shafts 131 through first bearings, the gear shafts 131 are distributed at equal angles on the same circumference, and the first planetary gear 132 and the second planetary gear 133 are respectively mounted at both ends of each gear shaft 131.
The assembly process of the stator assembly 100 is: firstly, laminating a plurality of silicon steel sheets, fixing the silicon steel sheets together through a plurality of bolts to form a stator core 110, and then winding a coil 120 on the stator core 110; then, the stator core is matched with the middle shaft 200 through a flat key sheath, and the stator core 110 is clamped on the middle shaft 200 at the left side and the right side by using snap springs respectively; finally, the gear shaft 131 is mounted in the stator core 110 through the first bearing 134, the first and second planetary gears 132 and 133 are fitted with the gear shaft 131 through the flat key sheath, and the first and second planetary gears 132 and 133 are fixed to the gear shaft 131 by the snap spring.
As shown in fig. 2 to 4, the inner rotor assembly includes a housing, a damping steel sheet 330 and a second transmission member 340, the housing is rotatably disposed on the central shaft 200, the housing has a closed installation cavity, the stator assembly 100 is located in the installation cavity, the damping steel sheet 330 is fixedly disposed around the stator assembly 100 in the installation cavity, the second transmission member 340 is disposed on the central shaft 200, a magnetic field generated by the stator assembly 100 acts on the damping steel sheet 330, so that the housing generates a resistance moment, and the resistance is transmitted to the second transmission member 340 through the first transmission member 130. In this embodiment, the damping steel sheets 330 are formed by fine blanking with a precision die, so that the dimensional accuracy of each damping steel sheet is high, the assembly gap of the damping steel sheets 330 is very precise, and the generated resistance fluctuation is not large.
As shown in fig. 2 to 4, 6 and 8, the second transmission member 340 includes an annular gear 341 and a pulley portion 342, the annular gear 341 is located in the mounting cavity and engaged with the second planetary gears 133, the pulley portion 342 is disposed on a side of the annular gear 341, the pulley portion 342 is mounted on the middle shaft 200 through the second bearing 350, and the pulley portion 342 is connected to a pulley of the exercise apparatus through a belt.
The inner rotor assembly further includes a sun gear 360, the housing includes a left frame 310 and a right frame 320, the left frame 310 is mounted on the middle shaft 200 through a third bearing 370, the right frame 320 is mounted on the pulley portion 342 through a fourth bearing 380, the right frame 320 is provided with a mounting cavity opened toward the side, the left frame 310 and the right frame 320 are detachably fixed together to enclose the mounting cavity, and the sun gear 360 is disposed in the left frame 310 and engaged with the first planetary gears 132.
As shown in fig. 2 to 4, 7 and 8, the left frame 310 has a first convex ring 311 protruding from a side edge thereof, the damping steel sheet 330 is accommodated in the installation cavity, the left frame 310 and the right frame 320 are locked by bolts, and the damping steel sheet 330 is stopped by the first convex ring 311 in the installation cavity. The left frame 310 is protruded towards the side edge to form a second convex ring 312, the outer wall of the second convex ring 312 is provided with a second rotation stopping rib 3121, the inner wall of the sun gear 360 is provided with a third rotation stopping groove 361, and the third rotation stopping groove 361 and the second rotation stopping rib 3121 are matched to prevent the relative rotation between the sun gear 360 and the left frame 310 when the fitness equipment works.
The inner wall of installation cavity is provided with first splines 321, and the outer wall of damping steel sheet 330 is provided with first splines 331, and the outer wall of first bulge loop 311 is provided with the second splines groove 3111, and first splines 331 and second splines groove 3111 and first splines 321 looks adaptation can prevent that body-building apparatus during operation, damping steel sheet 330 and right frame 320 between, take place relative rotation between left frame 310 and the right frame 320.
The assembly process of the inner rotor assembly is as follows: the pulley portion 342 is first mounted on the middle shaft 200 through the second bearing 350, and at the same time, the ring gear 341 is engaged with the second planetary gears 133; then, the damping steel plate 330 is installed in the right frame 320, and the sun gear 360 is installed in the second convex ring 312 of the left frame 310; thereafter, the left frame 310 is mounted to the bottom bracket 200 through the third bearing 370 with the sun gear 360 engaged with the first planetary gears 132, the right frame 320 is mounted to the pulley portion 342 through the fourth bearing 380, and finally, the left frame 310 and the right frame 320 are detachably fixed together with bolts.
As shown in fig. 3 to 5 and 8, the control board 400 is fixedly disposed on the stator core 110, the control board 400 is connected to the coil 120 through a power line, the central shaft 200 is provided with an axial opening, a control line 410 is disposed in the axial opening, and the control line 410 extends through the central shaft 200 along the axial opening and is connected to the control board 400.
The control board 400 is provided with a sensor (not shown in the figure), the second transmission member 340 is provided with a sensor 420 corresponding to the sensor, in this embodiment, the sensor may adopt a reflective optical coupling switch, the corresponding sensor adopts a reflective sheet with a black-white interval, the sensor may also adopt a hall switch, the corresponding sensor adopts a permanent magnet, the sensor may also adopt a photoelectric encoder, and the corresponding sensor adopts a grating sheet.
The assembly process of the control board 400 is: the control panel 400 is fixed together while the silicon steel sheets are fixed together by bolts, a power line is led out from the control panel 400 and is connected with the coil 120, then a control line 410 which penetrates out of the middle shaft 200 is connected with the control panel 400, the other end of the control line 410 is connected with an external power supply and a control console, and meanwhile, a sensor 420 is installed on one side, facing the control panel 400, of the pulley part 342.
The working principle of the utility model is as follows:
when current passes through the coil 120, a magnetic field is generated, and when the magnetic field passes through the rotating damping steel sheet 330, a resistance moment for preventing the damping steel sheet 330 from rotating is generated due to hysteresis and eddy current, and is transmitted to the second transmission member 340 through the first planetary gear 132 and the second planetary gear 133, so that resistance is brought to the movement of the exerciser through the belt wheel part 342.
The resisting torque generated by the magnetic field/the resisting torque of the pulley portion 342 is equal to the sun gear 360 diameter/the ring gear 341 diameter due to the first planet gears 132 and the second planet gears 133. Since the diameter of the ring gear 341 is larger than that of the sun gear 360, the resisting torque of the pulley portion 342 is larger than the electromagnetically generated resisting torque, that is, the resisting gear ratio output from the pulley portion 342 is increased.
The rotation speed of the inner rotor assembly/the rotation speed of the second transmission 340 is equal to the sun gear 360 diameter/the ring gear 341 diameter due to the first planetary gears 132 and the second planetary gears 133. Since the inner gear 341 has a larger diameter than the sun gear 360, the inner rotor assembly rotates faster than the second transmission 340, and resistance due to hysteresis and eddy current is also increased.
After the external console provides the required resistance signal, the signal is transmitted to the control board 400 through the control line 410, and the control board 400 obtains the rotating speed of the sensing object 420 through the sensor, and since the sensing object 420 is fixed on the second transmission member 340, the rotating speed of the sensing object 420 is the rotating speed of the second transmission member 340 (of course, the rotating speed of the second transmission member 340 can also be obtained by installing a magnetic encoder thereon). Then, the control board 400 outputs an appropriate current through the acquired magnitude signal of the desired resistance and the rotation speed of the pulley portion 342, and outputs a current to the coil 120 through the control board 400 to introduce the appropriate current, thereby generating the appropriate resistance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A closed electromagnetic damper is characterized in that: the inner rotor assembly comprises a stator assembly, a middle shaft and an inner rotor assembly;
the stator assembly comprises a stator core, a coil and a first transmission piece, the stator core is fixed on the middle shaft, the coil is wound on the stator core, and the first transmission piece is arranged on the stator core;
the inner rotor assembly comprises a shell, a damping steel sheet and a second transmission piece, wherein the shell is rotationally arranged on the central shaft, the shell is provided with a closed installation cavity, the stator assembly is located in the installation cavity, the damping steel sheet is fixedly arranged in the installation cavity around the stator assembly, the second transmission piece is arranged on the central shaft, and a magnetic field generated by the stator assembly acts on the damping steel sheet to enable the shell to generate a resistance moment and transmit the resistance to the second transmission piece through the first transmission piece.
2. A closed electromagnetic damper according to claim 1, characterized in that: the first transmission piece comprises a gear shaft, a first planetary gear and a second planetary gear, the gear shaft is rotatably arranged in the stator core in a penetrating mode, the first planetary gear and the second planetary gear are respectively installed at two ends of the gear shaft, the first planetary gear is in transmission connection with the shell, and the second planetary gear is in transmission connection with the second transmission piece.
3. A closed electromagnetic damper according to claim 2, characterized in that: the stator core is provided with three or more gear shafts through a first bearing, the gear shafts are distributed on the same circumference at equal angles, and the two ends of each gear shaft are respectively provided with the first planetary gear and the second planetary gear.
4. A closed electromagnetic damper according to claim 3, characterized in that: the second transmission part comprises an inner gear ring and a belt wheel part, the inner gear ring is located in the mounting cavity and meshed with the second planetary gear, the belt wheel part is arranged on the side edge of the inner gear ring, and the belt wheel part is mounted on the middle shaft through a second bearing.
5. A closed electromagnetic damper according to claim 4, characterized in that: the inner rotor subassembly still includes sun gear, the shell includes left frame and right frame, left side frame pass through the third bearing install in epaxial, right side frame pass through the fourth bearing install in take the wheel portion is last, right side frame is equipped with the opening towards the side the installation cavity, left side frame is together fixed with right frame detachably, in order to incite somebody to action the installation cavity seals, sun gear set up in the left side frame, and with first planetary gear meshes mutually.
6. A closed electromagnetic damper according to claim 5, characterized in that: the left rack protrudes towards the side edge to form a first convex ring, the damping steel sheet is contained in the installation cavity, the left rack and the right rack are locked through bolts, and the damping steel sheet is stopped and supported in the installation cavity by the first convex ring.
7. A closed electromagnetic damper according to claim 6, characterized in that: the inner wall of installation cavity is provided with first only commentaries on classics muscle, the outer wall of damping steel sheet is provided with first only commentaries on classics groove, the outer wall of first bulge loop is provided with the second and ends the commentaries on classics groove, first only commentaries on classics groove and second only commentaries on classics groove with first only commentaries on classics muscle looks adaptation.
8. A closed electromagnetic damper according to claim 6, characterized in that: the left rack is formed with a second convex ring towards the protrusion of the side edge of the left rack, the outer wall of the second convex ring is provided with a second rotation stopping rib, the inner wall of the sun gear is provided with a third rotation stopping groove, and the third rotation stopping groove is matched with the second rotation stopping rib.
9. A closed electromagnetic damper according to claim 1, characterized in that: the control panel is fixedly arranged on the stator core and connected with the coil through a power line, an axial hole is formed in the middle shaft, a control line penetrates through the axial hole, and the control line extends through the middle shaft along the axial hole and then is connected with the control panel.
10. A closed electromagnetic damper according to claim 9, characterized in that: the control panel is provided with a sensor, and the second transmission part is provided with a sensing object corresponding to the sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121422071.2U CN217002868U (en) | 2021-06-25 | 2021-06-25 | Closed electromagnetic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121422071.2U CN217002868U (en) | 2021-06-25 | 2021-06-25 | Closed electromagnetic damper |
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| Publication Number | Publication Date |
|---|---|
| CN217002868U true CN217002868U (en) | 2022-07-19 |
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| CN202121422071.2U Active CN217002868U (en) | 2021-06-25 | 2021-06-25 | Closed electromagnetic damper |
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| CN (1) | CN217002868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439878A (en) * | 2021-06-25 | 2022-05-06 | 厦门景杉网络科技有限公司 | Closed electromagnetic damper |
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2021
- 2021-06-25 CN CN202121422071.2U patent/CN217002868U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439878A (en) * | 2021-06-25 | 2022-05-06 | 厦门景杉网络科技有限公司 | Closed electromagnetic damper |
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