CN212454069U

CN212454069U - Simple direct-drive rotary execution device

Info

Publication number: CN212454069U
Application number: CN202021146146.4U
Authority: CN
Inventors: 周飞; 黄建昌; 芮正国; 沈庆
Original assignee: Oechsler Plastic Products Taicang Co Ltd
Current assignee: Oechsler Plastic Products Taicang Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-02-02
Anticipated expiration: 2030-06-18

Abstract

The utility model belongs to the technical field of intelligent household electrical appliances, concretely relates to succinct type directly drives rotatory final controlling element. The simple direct-drive rotation executing device comprises a shell, a rotary table, a rotary shaft and a power unit, wherein the rotary shaft is rotatably arranged in the shell, and the rotary shaft is provided with a circular rotary table perpendicular to the rotary shaft; the turntable is also provided with a magnetic substance; at least one side of the rotating disc is provided with a power unit capable of electromagnetically driving the rotating disc, and the power unit is fixed with the shell; the power unit includes a set of windings. The utility model has the advantages of multiple aspects, simple and compact integral structure, simple transmission, no need of separate clutch device, and capability of realizing automatic door opening and closing and manual-automatic integrated functions; the power unit has no static resistance torque, and the device is not self-locked; the electric control unit and the winding are integrated into a whole, extra wiring harness connection is not needed, extra installation space is not needed, and the overall reliability is higher; the back electromotive force waveform distortion rate of the tooth-groove-free structure is low, and more accurate monitoring and judgment are facilitated.

Description

Simple direct-drive rotary execution device

Technical Field

The utility model belongs to the technical field of intelligent household electrical appliances, concretely relates to succinct type directly drives rotatory final controlling element.

Background

The door opening and closing device adopted by the intelligent household electrical appliance in the market at present only has a small part to realize the functions of automatically opening and closing the door and automatically opening and closing the door. The door opening and closing device usually comprises a clutch device, a multi-stage gear transmission mechanism, a position sensor and an electric control unit which are independently arranged, and the mutual cooperation of the devices can realize the functions of automatically opening and closing the door and manually and automatically integrating the functions, but has inherent defects which are difficult to overcome.

The clutch device comprises various forms such as an electromagnetic clutch, a mechanical clutch and the like, has a complex internal structure and is limited by output torque, and the existing clutch device is difficult to miniaturize and lighten. In order to match the power output with the torque and rotating speed requirements of opening and closing the door, a multi-stage gear transmission mechanism is often arranged, usually three or more stages of gear transmission mechanisms are arranged, and the gear transmission mechanisms are relatively complex in structure, large in occupied space and poor in reliability; moreover, the damping effect seriously affects the hand feeling when the door is opened and closed manually. Position sensors, such as micro-switches, hall sensors, photoelectric switches, angle encoders, rotary transformers, magnetic sensors, and the like, also have problems of poor space occupation and reliability. Although the independent electric control unit has a small structure, an additional wire harness is required for connection, so that the reliability is poor, and a lot of inconvenience is brought to structural design and assembly.

For example, patent document CN 209808276U discloses a torque limiter for a door opening and closing device, and a household electrical appliance, in which the torque limiter (clutch device) realizes an original manual door opening and closing function. The device has the advantages of complex structure and poor reliability, and although the manual function can be realized, the hand feeling is poor and the resistance is obvious. In the conventional patent document CN105971439B, a door opening motor assembly, an automatic door opening system, an operating method thereof, and a refrigerator are disclosed, in which an electromagnetic clutch device is used to disengage a clutch gear from a transmission position, so as to achieve the purpose of manually opening and closing a door. However, the electromagnetic clutch device is complex, the required rotating speed is low in the process of transmitting torque, otherwise, the device cannot timely push the clutch gear to be meshed with other gears, and further the problem of failure occurs.

Conventionally, there are many practical contradictions that are difficult to overcome in terms of simplified structure, light weight design, structural reliability, manufacturing cost, operational quality, and the like of an automatic door opening and closing device.

Disclosure of Invention

The utility model provides a rotary actuator is directly driven to succinct type to overcome the above-mentioned problem that exists among the prior art.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a succinct type directly drives rotatory final controlling element which characterized in that: the rotary table comprises a shell, a rotary table, a rotary shaft and a power unit, wherein the rotary shaft is rotatably arranged in the shell, and the rotary shaft is provided with a circular rotary table perpendicular to the rotary shaft; the turntable is also provided with a magnetic substance; at least one side of the rotating disc is provided with a power unit capable of electromagnetically driving the rotating disc, and the power unit is fixed with the shell; the power unit includes a set of windings.

The utility model discloses but the automatic switch door operation of direct application in intelligent household electrical appliances to the intelligence refrigerator is the example, will the utility model discloses a pivot and refrigerator door body lug connection or use the power connecting piece to be connected, thereby it is rotatory to drive the refrigerator door body. The utility model discloses compact structure drives through the magnetic force effect between carousel and the power pack. Because the turntable and the power unit are of a structure without iron cores and tooth grooves, the static resistance torque of the turntable and the power unit is theoretically zero, and the turntable can rotate smoothly under the condition that the power unit is not electrified, so that the seamless switching of the manual-automatic integrated function is realized.

Preferably, in the compact direct-drive rotary actuator, the turntable is made of a magnetic conductive medium, and the shell is made of a magnetic conductive medium, so that the utilization efficiency of the magnetic field is improved.

Preferably, in the compact direct-drive rotation executing device, the magnetic substance is located at one side of the turntable and forms a group of magnetic poles distributed in an annular array; the windings are distributed in a ring array, and the windings and the magnetic substance are positioned on the same side of the turntable.

Furthermore, the compact direct-drive rotation executing device further comprises an output shaft, the output shaft penetrates through the shell, one end of the output shaft is in power connection with the rotating shaft, and the other end of the output shaft extends out of the shell. The output shaft is additionally arranged and is connected with a load through the output shaft, such as a rotatable door body and the like, so that the flexibility and the adaptability of the simple direct-drive rotary execution device during actual assembly are improved.

Furthermore, in the compact direct-drive rotation executing device, the rotating shaft is provided with a first gear; the output shaft is provided with a second gear; the output shaft is in power connection with the rotating shaft through the meshing of the first gear and the second gear. In addition, the output shaft and the second gear can be integrally connected or detachably connected, and preferably integrally connected; the rotating shaft and the first gear can be integrally connected or detachably connected, and preferably assembled and connected.

Preferably, in the compact direct-drive rotary actuator, the housing is a cylindrical housing; the rotating shaft is arranged along the central axis of the shell; the output shaft is disposed off-center from the central axis of the housing, but parallel to the central axis of the housing. The central axis of the output shaft deviating from the shell is arranged to be beneficial to the fact that the device is fully hidden during assembly, and the device is suitable for more use scenes.

Furthermore, the compact direct-drive rotation executing device further comprises an electric control unit electrically connected with the winding, and the electric control unit comprises a logic circuit board. The electric control unit is integrated with the winding and monitors the back electromotive force of the winding in real time, and the waveform obtained by monitoring is compared with a standard waveform, so that the self-feedback function is realized. Specifically, as shown in fig. 1, the standard waveform, i.e., curve a, refers to the waveform obtained by sampling the device under normal operating condition load. Under the normal working condition, the device meets and hinders in the normal load scope, through the PI control of electrical control unit, can keep original invariable rotational speed, the back emf waveform that obtains this moment still is standard waveform. Under the condition of extreme heavy load, the resistance of the device exceeds the normal load range, the constant speed cannot be realized by PI control, the rotating speed is reduced, and the waveform period is inconsistent with the standard waveform at the moment, as shown in a curve b of figure 1.

Preferably, in the compact direct-drive rotary actuator, the power unit and the electric control unit are integrally packaged and molded by a non-magnetic-conductive medium. Compact structure, small occupied space and strong reliability.

Furthermore, in the compact direct-drive rotary actuator, the logic circuit board is electrically connected with the winding through the switch.

Preferably, in the compact direct-drive rotary actuator, the winding is preferably formed by winding electromagnetic wires with high insulation grade, the magnetic substance is preferably a rare-earth permanent magnet, and the turntable as a carrier can be made of a conventional magnetic conductive medium, preferably steel No. 10.

In addition, as another improvement scheme, the turntable is made of magnetic substances, and other magnetic substances are not additionally arranged on the turntable; the magnetic substance comprises a rare earth permanent magnetic material.

The utility model discloses a succinct type directly drives rotatory final controlling element's working method as follows.

When the door is automatically opened and closed, an electric signal instruction for opening and closing the door is input to the logic circuit board, the logic circuit board synthesizes a door opening or closing instruction signal, after the signal is judged to be valid, the power unit is electrified, and the power unit generates a rotating magnetic field to drive the turntable to rotate; after the turntable rotates to a preset door opening and closing position, the logic circuit board monitors the back electromotive force of the power unit in real time, confirms that the power unit reaches a target position, and stops electrifying the power unit, so that the electric door opening or closing is completed;

when the door is opened and closed manually, the external force drives the rotating disc to rotate freely; the power unit is not electrified and does not act with the turntable;

under the overload condition, the logic circuit board monitors the current consumption of the power unit exceeding the current range under the normal load working condition in real time, the overload protection is triggered, and the power unit stops running.

Has the advantages that: according to the technical scheme provided by the utility model, the utility model provides a succinct type directly drives rotatory final controlling element and has following many-sided advantage.

(1) The automatic door opening and closing device has the advantages of simple and compact integral structure, simple transmission, no need of an independent clutch device, capability of realizing the functions of automatic door opening and closing and manual and automatic integration, and strong adaptability and higher application value.

(2) The power unit has a tooth-groove-free structure, and static resistance torque is zero, so that the device is not self-locked, and a manual-automatic integrated function is realized.

(3) The electric control unit and the winding are integrated integrally, extra wiring harness connection is not needed, extra installation space is not needed, and the overall reliability is higher.

(4) The electric control unit monitors the back electromotive force of the winding wire in real time and judges whether the door is opened or closed in place; the structure without tooth grooves has lower back electromotive force waveform distortion rate, and is convenient for more accurate monitoring and judgment.

Drawings

FIG. 1 is a schematic diagram of a comparison of a standard waveform and a heavy duty waveform;

FIG. 2 is a schematic structural view of embodiment 1;

FIG. 3 is a schematic structural view of example 2;

FIG. 4 is a schematic structural view of examples 3 and 4;

FIG. 5 is a schematic view showing the internal structure of a power unit according to

embodiments

3, 4 and 5;

FIG. 6 is a schematic structural view of example 5;

fig. 7 is a schematic diagram of the working logic of the present invention.

In the figure, a shell 1, a rotary table 2, a rotary shaft 3, a first gear 31, a power unit 4, an output shaft 5, a second gear 51 and an electronic control unit 6 are arranged.

Detailed Description

The present invention is further illustrated by the following specific examples, which are intended to be illustrative only and not limiting.

Example 1

A simple direct-drive rotation executing device is shown in figure 2 and comprises a shell 1, a rotary table 2, a rotary shaft 3 and a power unit 4, wherein the rotary shaft 3 is rotatably arranged in the shell 1, and the rotary shaft 3 is provided with a circular rotary table 2 perpendicular to the rotary shaft 3; the turntable 2 is also provided with a magnetic substance; at least one side of the rotary table 2 is provided with a power unit 4 capable of electromagnetically driving the rotary table 2, and the power unit 4 is fixed with the shell 1; the power unit 4 comprises a set of windings.

Example 2

A simple direct-drive rotation executing device is shown in figure 3 and comprises a shell 1, a rotary table 2, a rotary shaft 3 and a power unit 4, wherein the rotary shaft 3 is rotatably arranged in the shell 1, and the rotary shaft 3 is provided with a circular rotary table 2 perpendicular to the rotary shaft 3; the turntable 2 is also provided with a magnetic substance; at least one side of the rotary table 2 is provided with a power unit 4 capable of electromagnetically driving the rotary table 2, and the power unit 4 is fixed with the shell 1; the power unit 4 comprises a set of windings.

In this embodiment, still include output shaft 5, output shaft 5 runs through casing 1 and sets up, and output shaft 5's one end and pivot 3 power connection, the other end of output shaft 5 stretches out casing 1.

In this embodiment, the rotating shaft 3 is provided with a first gear 31; the output shaft 5 is provided with a second gear 51; the output shaft 5 is in power connection with the rotating shaft 3 through the meshing of the first gear 31 and the second gear 51.

In the present embodiment, the housing 1 is a cylindrical housing; the rotating shaft 3 is arranged along the central axis of the shell 1; the output shaft 5 is arranged offset from the central axis of the housing 1, but parallel to the central axis of the housing 1.

Example 3

A simple direct-drive rotation executing device is shown in figures 4 and 5 and comprises a shell 1, a rotary table 2, a rotary shaft 3 and a power unit 4, wherein the rotary shaft 3 is rotatably arranged in the shell 1, and the rotary shaft 3 is provided with a circular rotary table 2 perpendicular to the rotary shaft 3; the turntable 2 is also provided with a magnetic substance; at least one side of the rotary table 2 is provided with a power unit 4 capable of electromagnetically driving the rotary table 2, and the power unit 4 is fixed with the shell 1; the power unit 4 comprises a set of windings.

In this embodiment, the magnetic substance is located at one side of the turntable 2 and forms a group of magnetic poles distributed in an annular array; the windings are distributed in a ring array, and the windings and the magnetic substance are positioned on the same side of the turntable 2.

In this embodiment, the winding further includes an electronic control unit 6 electrically connected to the winding, and the electronic control unit 6 includes a logic circuit board.

The working method of the compact direct-drive rotation executing device provided by the embodiment is shown in fig. 7.

When the door is automatically opened and closed, an electric signal instruction for opening and closing the door is input into the logic circuit board, the logic circuit board comprehensively opens or closes the door instruction signal, after the signal is judged to be valid, the power unit 4 is electrified, and the power unit 4 generates a rotating magnetic field to drive the turntable 2 to rotate; after the turntable 2 rotates to a preset door opening and closing position, the logic circuit board monitors the back electromotive force of the power unit 4 in real time, confirms that the target position is reached, and stops electrifying the power unit 4, so that the electric door opening or closing is completed;

when the door is opened and closed manually, the external force drives the rotating disc 2 to rotate freely; the power unit 4 is not electrified and does not act with the turntable 2;

under the overload condition, the logic circuit board monitors the current consumption of the power unit 4 in real time to exceed the current range under the normal load working condition, the overload protection is triggered, and the power unit 4 stops running.

Example 4

In this embodiment, the turntable 2 is made of a magnetic conductive medium; the housing 1 is made of a magnetically conductive medium.

In this embodiment, the power unit 4 and the electronic control unit 6 are integrally packaged and molded by a non-magnetic medium.

In this embodiment, the matching relationship between the power unit 4 and the magnetic substance is determined based on the slot pole matching theory, and the detailed parameters are shown in table 1 after depth optimization.

TABLE 1

Material of shell	No. 10 steel	Magnetic material	N48H
				Thickness of the outer shell/mm	4.3	Number of magnetic pole pairs	2
Outer diameter/mm of housing	80	Magnetic pole outer diameter/mm	77.5
				Winding external diameter/mm	77.5	Pole arc coefficient of magnetic pole	0.95
Inner diameter/mm of winding	34	Thickness of magnetic pole/mm	5.4
				Number of turns per phase winding	64	Disc thickness/mm	5.6
Air gap length/mm	4.6

Example 5

A simple direct-drive rotation executing device is shown in figures 5 and 6 and comprises a shell 1, a rotary table 2, a rotary shaft 3 and a power unit 4, wherein the rotary shaft 3 is rotatably arranged in the shell 1, and the rotary shaft 3 is provided with a circular rotary table 2 perpendicular to the rotary shaft 3; the rotary table 2 is made of magnetic substances; at least one side of the rotary table 2 is provided with a power unit 4 capable of electromagnetically driving the rotary table 2, and the power unit 4 is fixed with the shell 1; the power unit 4 comprises a set of windings.

In this embodiment, the housing 1 is made of a magnetic conductive medium.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a succinct type directly drives rotatory final controlling element which characterized in that: the rotary table comprises a shell (1), a rotary table (2), a rotary shaft (3) and a power unit (4), wherein the rotary shaft (3) is rotatably arranged in the shell (1), and the rotary shaft (3) is provided with the circular rotary table (2) vertical to the rotary shaft (3); the turntable (2) is also provided with a magnetic substance; at least one side of the rotary table (2) is provided with a power unit (4) capable of electromagnetically driving the rotary table (2), and the power unit (4) is fixed with the shell (1); the power unit (4) comprises a set of windings.

2. The compact direct-drive rotary actuator of claim 1, further comprising: the turntable (2) is made of a magnetic conductive medium; the shell (1) is made of a magnetic conductive medium.

3. The compact direct-drive rotary actuator of claim 1, further comprising: the magnetic substance is positioned on one side of the turntable (2) and forms a group of magnetic poles distributed in an annular array; the windings are distributed in an annular array, and the windings and the magnetic substance are located on the same side of the rotary disc (2).

4. The compact direct-drive rotary actuator of claim 1, further comprising: the power transmission device is characterized by further comprising an output shaft (5), wherein the output shaft (5) penetrates through the shell (1), one end of the output shaft (5) is in power connection with the rotating shaft (3), and the other end of the output shaft (5) extends out of the shell (1).

5. The compact direct-drive rotary actuator of claim 4, further comprising: a first gear (31) is arranged on the rotating shaft (3); the output shaft (5) is provided with a second gear (51); the output shaft (5) is in power connection with the rotating shaft (3) through the meshing of the first gear (31) and the second gear (51).

6. The compact direct-drive rotary actuator of claim 5, further comprising: the shell (1) is a cylindrical shell; the rotating shaft (3) is arranged along the central axis of the shell (1); the output shaft (5) is deviated from the central axis of the shell (1) and is parallel to the central axis of the shell (1).

7. The compact direct-drive rotary actuator according to any one of claims 1 to 6, wherein: the winding is characterized by further comprising an electric control unit (6) electrically connected with the winding, wherein the electric control unit (6) comprises a logic circuit board.

8. The compact direct-drive rotary actuator of claim 7, further comprising: the power unit (4) and the electric control unit (6) are integrally packaged and molded by non-magnetic-conductive media.

9. The compact direct-drive rotary actuator of claim 1, further comprising: the rotary table (2) is made of magnetic substances, and other magnetic substances are not additionally arranged on the rotary table (2); the magnetic substance comprises a rare earth permanent magnetic material.