CN213846454U - Transmission mechanism of miniature lifter - Google Patents
Transmission mechanism of miniature lifter Download PDFInfo
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- CN213846454U CN213846454U CN202120021353.5U CN202120021353U CN213846454U CN 213846454 U CN213846454 U CN 213846454U CN 202120021353 U CN202120021353 U CN 202120021353U CN 213846454 U CN213846454 U CN 213846454U
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Abstract
The utility model provides a drive mechanism of miniature riser, this mechanism includes: the electric driving system controls the micro outer rotor brushless motor to operate, the motor shaft transmits power to the brake, the brake is released when the brake is electrified, the motor shaft transmits the power to the input shaft of the micro harmonic speed reducer, and the power is transmitted to the output end of the micro harmonic speed reducer after the speed of the speed reducer is reduced, so that a corresponding mechanism is driven to work. The transmission mechanism of the miniature lifter adopts a miniature external rotor brushless motor, has the advantages of light weight, small volume, high rotating speed, high power and the like, adopts a miniature harmonic speed reducer, and has the advantages of compact structure, light weight, strong load energy, high efficiency, compact integral structure, light weight which is less than 2.5kg, convenient and quick single-machine operation and the like.
Description
Technical Field
The utility model belongs to the technical field of a riser technique and specifically relates to a drive mechanism of miniature riser is related to.
Background
The miniature elevator, which uses a rope for movement, can help personnel to move freely from place to place during working at height, and can also be used for transporting heavy objects from place to place and carrying tool equipment from place to place. The structure and principle of the rope miniature lifter commonly used at present are various, but the rope miniature lifter has more or less defects in the application process, such as: the equipment has large mass and is inconvenient to carry, the existing similar equipment on the market is more than 13kg, and particularly, other weaponry are required to be carried when the equipment is used by special polices and troops, so the equipment has large weight and is very unfavorable; the power adopts commercial power or a common power supply, and can not be used in the field or occasions where the commercial power is inconvenient, or the power is driven by a small gasoline engine, so that the noise is high, the environment is polluted, and the fire disaster is easy to occur; when in operation, the direction and the speed are controlled separately, so the operation is inconvenient; even if a single rope pulley design is adopted, the load capacity is small; do not have some critical protection functions; the device does not have the function of descending and charging, thereby not only wasting energy but also damaging a motor driver.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of heavy weight, large volume and the like of the existing lifter, the use requirements of special polices, armies, fire fighting and the like cannot be met, and a miniature lifter which is light in weight, small in volume and not fewer in functions than the existing lifter needs to be designed.
The elevator is generally composed of a drive mechanism and a transmission mechanism. For realizing light in weight's miniature riser, the key technical problem lies in the drive mechanism part of miniature riser, the utility model discloses a technical scheme as follows:
a transmission mechanism of a miniature lifter comprises a miniature brushless outer rotor motor, a brake, a miniature harmonic speed reducer, a harmonic speed reducer mounting disc, a brake mounting bracket and a fan; one end of the miniature brushless external rotor motor is provided with a fan, the other end of the miniature brushless external rotor motor is connected with one end of a brake through a brake mounting bracket, and the other end of the brake is connected with one end of a harmonic speed reducer through a speed reducer mounting disc.
The utility model provides a drive mechanism of miniature riser, from power transmission, miniature brushless external rotor motor of electric drive system control of miniature riser carries out high-speed operation, and the motor shaft is gone to the brake with power on, and the brake is got the electricity release active cell, and the motor shaft rotates and does not have the resistance, and the motor shaft is with power transmission to miniature harmonic speed reducer machine input shaft, after the speed reducer slows down, power transmission to miniature harmonic speed reducer machine output, drives corresponding mechanism and carries out work. Because of the need of larger torque and the need of a large power motor with small volume and light weight, a special motor is adopted: the miniature external rotor brushless motor is characterized by small volume, light weight, high speed, large power, peak power larger than 3KW, torque amplification and rotation speed reduction through a miniature harmonic reducer, and the harmonic reducer is characterized by small volume, light weight, large reduction ratio, large bearing torque and input shaft adaptability to high speed. The perfect matching of the specific motor and the specific speed reducer meets the requirements of the miniature lifter.
In order to adapt to different load conditions, the control system detects the driving current and continuously adjusts the current for ensuring a set rotating speed, and the control realizes load closed-loop control. The rotating speed of the motor is steplessly adjustable from 0-10000r/min, an encoder is arranged at the connecting end of the miniature brushless outer rotor motor and the fan, the rotating speed of the motor is measured in real time, and the rotating speed of the motor is adjusted through the controller to reach the speed setting of the finger dialing device, so that the closed-loop control on the rotating speed aspect is realized; meanwhile, the fan is arranged on the output shaft of the motor to dissipate heat and reduce temperature, so that the motor is not overheated during operation.
Furthermore, the miniature outer rotor brushless motor is a miniature permanent magnet outer rotor brushless motor. The miniature permanent magnet outer rotor is internally pasted with a permanent magnet magnetic pole, the inner stator is composed of a coil winding, under the drive of a driver, the coil of the inner stator generates an alternating magnetic pole, the permanent magnet magnetic pole of the outer rotor and the alternating magnetic pole of the inner stator interact to generate a rotating force, so that the outer rotor rotates along with the rotating magnetic field of the inner stator, the rotating speed of the outer rotor is related to the change rate of the magnetic field of the inner stator, the torque generated by the outer rotor is related to the magnetic field intensity generated by the current of the inner rotor, the outer rotor and a motor shaft are fixed into a whole, and the outer rotor rotates to drive the motor shaft to output power. The permanent magnet outer rotor brushless motor has the characteristics of light weight, small volume, high power, high rotating speed, high efficiency and large rotational inertia.
The brake is used for preventing the load from falling under the action of gravity when the motor loses power, stops and the like, and the micro lifter and the heavy object are out of control, which is very dangerous. When a heavy object is pulled to rise, when the motor is about to rotate but the torque does not reach a certain degree (the degree refers to the weight that the torque is not enough to overcome the load), the brake is powered off, the rotor brake sheet and the fixed friction disc are pressed together by the spring to realize the band-type brake, when the torque of the motor is equal to the certain degree, the brake is powered on, the spring is compressed by electromagnetic force, the motor starts to transmit power to the speed reducer and the rope pulley, at the moment, the torque can overcome the gravity generated by the load, and the miniature lifter drives the load to move upwards. When the motor is stopped and the speed of the motor is reduced to a certain degree, the motor is about to stop, and the brake is switched off. The control mode is that the motor is to stop braking and lose power to the internal contracting brake once, so that the motor is prevented from being reversely driven by the load to rotate.
The rotor center wheel is fixedly connected with the motor shaft through a key, the rotor brake pads are arranged on the rotor center wheel and meshed through teeth, and the rotor brake pads can axially move on the rotor center wheel so as to release and brake.
The harmonic speed reducer is a new type transmission structure in speed reducer, it utilizes flexible gear to produce controllable elastic deformation wave to cause the relative dislocation of teeth of rigid gear and flexible gear to transmit power and movement. The transmission is essentially different from general gear transmission, and has particularity in the aspects of meshing theory, collective calculation and structural design. Compared with the common speed reducer, the harmonic speed reducer has the advantages of high precision, high bearing capacity and the like, and the volume and the weight of the harmonic speed reducer are reduced by at least 1/3 due to the fact that 50% less materials are used.
When the wave generator is active, the cam rotates in the flexible gear to deform the flexible gear and the thin-wall bearing nearby (controllable elastic deformation), and the teeth of the flexible gear enter (mesh) or exit (mesh away) the teeth of the rigid gear in the deformation process, are completely meshed at the long axis of the wave generator, and the teeth in the short axis direction are completely disengaged.
The wave generator is usually an elliptical cam, which is fitted into a thin-walled bearing and then into a flexspline. At the moment, the flexible gear is changed into an ellipse from the original circle, the flexible gears at the two ends of the long axis of the ellipse are in a complete meshing state with the matched rigid gear teeth, namely, the external teeth of the flexible gear are meshed with the internal teeth of the rigid gear along the tooth height. This is the meshing zone, with about 30% of the teeth in mesh; the flexible gear teeth and the rigid gear teeth at the two ends of the elliptical short shaft are in a complete disengagement state, namely disengagement for short; some of the flexible gear teeth between the major axis and the minor axis of the wave generator gradually withdraw from the rigid gear teeth in different sections along the circumference of the flexible gear, and are in a half-disengaged state, namely, meshing-out.
When the wave generator rotates in the flexible gear, the flexible gear is forced to generate continuous elastic deformation, and the continuous rotation of the wave generator makes the four states of meshing-disengaging of the flexible gear teeth cyclically and repeatedly change the original meshing state. This phenomenon is called staggered tooth movement, and it is this staggered tooth movement that can be used as a speed reducer to change the input high speed rotation into the output low speed rotation.
The motor shaft is connected with the input shaft of the wave generator in a key mode, the shaft end is used for limiting the wave generator to move axially through screws, a steel wheel of the harmonic speed reducer is fixed to a transmission mechanism and a fixing wall plate of equipment through screws, and the motor power transmits power to the wave generator through the motor shaft to drive the harmonic speed reducer to work.
Compared with the prior art, the utility model has the advantages that:
1. the transmission mechanism of the miniature lifter adopts a permanent magnet outer rotor brushless motor, and has the advantages of light weight, small volume, high rotating speed, high power and the like.
2. The transmission mechanism of the miniature lifter adopts a harmonic speed reducer, and has the advantages of compact structure, light weight, strong load energy, high efficiency and the like.
3. The transmission mechanism of the miniature lifter uses the action power and the control power of the rechargeable lithium battery, is convenient to carry, has wide use occasions, is green and environment-friendly and has no pollution;
4. the transmission mechanism of the miniature lifter has the advantages of compact integral structure, light weight less than 2.5kg and convenient and quick single-machine operation.
Drawings
FIG. 1 is a schematic view of the structure of the transmission mechanism of the micro-lift of the present invention;
1. a wave generator limit pin; 2. a harmonic speed reducer; 3. a harmonic reducer mounting disc; 4. braking; 5. a brake mounting bracket; 6. an outer rotor brushless motor; 7. a fan; 8. encoder for encoding a video signal
FIG. 2 is a schematic view of the braking structure of the transmission mechanism of the micro-lift of the present invention;
9. a fixed friction disk; 10. a rotor brake pad; 11. a rotor center wheel; 12. mounting screws; 13. an adjustment sheet; 14. tightening the screw; 15. a brake body; 16. a brake lever head; 17. a brake lever; 18. a brake lever bracket; 19. rotating shaft
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, which are not intended to limit the scope of the present invention.
As shown in fig. 1, a transmission mechanism of a micro lifter comprises a micro harmonic speed reducer (2), a harmonic speed reducer mounting disc (3), a brake (4), a brake mounting bracket (5), a micro brushless external rotor motor (6) and a fan (8), wherein the fan is arranged at one end of the micro brushless external rotor motor (6), the other end of the micro brushless external rotor motor (6) is connected with one end of the brake (4) through the brake mounting bracket (5), and the other end of the brake (4) is connected with one end of the harmonic speed reducer (2) through the speed reducer mounting disc (3).
The electric driving system of the miniature lifter controls the miniature brushless outer rotor motor (6) to run at a high speed, the motor shaft rotates power to the brake (4), the brake (4) is electrified to release the rotor, the motor shaft rotates without resistance, the motor shaft transmits the power to the input shaft of the miniature harmonic speed reducer (2), and after the speed of the motor shaft is reduced by the harmonic speed reducer (2), the power is transmitted to the output end of the miniature harmonic speed reducer to drive the corresponding mechanism to work.
In order to adapt to different load conditions, the control system detects the driving current and continuously adjusts the current for ensuring a set rotating speed, and the control realizes load closed-loop control. The rotating speed of the motor is steplessly adjustable from 0-10000r/min, one end of a miniature brushless outer rotor motor (6) is provided with an encoder (7), the rotating speed of the motor is measured in real time, the rotating speed of the motor is adjusted through a controller to reach the speed setting of the finger dialing device, and closed-loop control on the rotating speed aspect is achieved.
As shown in figure 2, the brake comprises a fixed friction disc (9), a rotor brake pad (10), a rotor center wheel (11), an installation screw (12), an adjustment sheet (13), a set screw (14), a brake body (15), a brake hand lever head (16), a brake hand lever (17), a brake hand lever frame (18) and a rotating shaft (19).
The rotor center wheel (11) is fixedly connected with a motor shaft through a key, the rotor brake pads (10) are arranged on the rotor center wheel (11) and meshed through teeth, and the rotor brake pads (10) can axially move on the rotor center wheel (11) so as to release and band-type brake.
The foregoing is a more detailed description of the structure and operation of the present invention, and the detailed description is not to be taken in a limiting sense. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of conceiving, can also make a plurality of simple deductions or replacement, all should regard as belonging to this novel scope of protection of use.
Claims (3)
1. The utility model provides a drive mechanism of miniature riser which characterized in that: miniature harmonic speed reducer machine (2), harmonic speed reducer machine mounting disc (3), brake (4), brake installing support (5), miniature brushless external rotor electric machine (6), fan (8), miniature brushless external rotor electric machine (6) one end is equipped with the fan, and miniature brushless external rotor electric machine (6) other end is connected with brake (4) one end through brake installing support (5), and the other end of brake (4) passes through speed reducer machine mounting disc (3) and is connected with harmonic speed reducer machine (2) one end.
2. The transmission mechanism of a micro-lifter according to claim 1, wherein: an encoder (7) is arranged at the connecting end of the miniature brushless outer rotor motor (6) and the fan (8).
3. The transmission mechanism of a micro-lifter according to any one of claims 1 or 2, wherein: the miniature brushless outer rotor motor (6) is a miniature permanent magnet outer rotor brushless motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021353.5U CN213846454U (en) | 2021-01-06 | 2021-01-06 | Transmission mechanism of miniature lifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021353.5U CN213846454U (en) | 2021-01-06 | 2021-01-06 | Transmission mechanism of miniature lifter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213846454U true CN213846454U (en) | 2021-07-30 |
Family
ID=77001370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120021353.5U Active CN213846454U (en) | 2021-01-06 | 2021-01-06 | Transmission mechanism of miniature lifter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213846454U (en) |
-
2021
- 2021-01-06 CN CN202120021353.5U patent/CN213846454U/en active Active
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