Energy-saving device for self-adaptive adjustment of motor torque

Abstract

The invention discloses an energy-saving device for self-adaptive adjustment of motor torque, and belongs to the technical field of motor energy conservation. The armature stator is fixed on the inner circumference of the motor frame, consists of an iron core and a winding wire, and is used for generating a rotating magnetic field; the permanent magnet rotor assembly rotates in the motor frame and is used for interacting with a rotating magnetic field of the armature stator to generate a rotating torque; and the output shaft is rotationally connected to the motor frame and is used for outputting the torque of the permanent magnet rotor assembly. By arranging the air gap adjusting assembly and the permanent magnet rotor assembly, the air gap between the stator and the rotor can change along with the change of the load in a variable-load working environment, and the problem that the air gap between the stator and the rotor cannot change along with the change of the load under the condition that the load of the motor is changed at present is effectively solved. And the output torque and the power of the motor cannot be adaptively adjusted along with the change of the load, so that the electric energy consumption of the motor is relatively high under the condition of variable load.

Description

Technical Field

[0001] The invention belongs to the technical field of motor energy saving, and specifically refers to an energy-saving device for adaptively adjusting motor torque. Background Art

[0002] In industry and daily life, motors are widely used in various devices to provide power and drive. However, due to the fixed internal structure of traditional brushless single-unit motors, the load of the motor often changes, the excitation strength of the motor is not easy to adjust, and the output torque and power of the motor cannot adapt well to the change of load. When the load is low, the motor still runs at high power, resulting in a waste of electric energy.

[0003] Therefore, in order to enable the output torque and power of the motor to be adaptively adjusted as the load changes, automatically adjust the air gap between the stator and the rotor when the load changes, and save energy consumption under variable load conditions, an energy-saving device for motor torque adaptive adjustment is proposed. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an energy-saving device with adaptive adjustment of motor torque, which effectively solves the problem that the output torque and power of the motor cannot be adaptively adjusted as the load changes, resulting in high power consumption of the motor under variable load conditions.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes an energy-saving device for adaptively adjusting motor torque, comprising a motor frame;

[0006] The armature stator fixed on the inner circumference of the motor frame is composed of an iron core and windings, and is used to generate a rotating magnetic field;

[0007] A permanent magnet rotor assembly rotating in the motor frame is used to interact with the rotating magnetic field of the armature stator to generate a rotational torque;

[0008] An output shaft connected to the motor frame is rotated, and the output shaft is used to output the torque of the permanent magnet rotor assembly;

[0009] An air gap adjustment component, which is mounted on the output shaft and connected to the permanent magnet rotor component, and is used to adjust the air gap between the permanent magnet rotor component and the armature stator;

[0010] The air gap adjustment assembly includes a torque sensing structure installed on the output shaft and a conduction disk installed on the permanent magnet rotor assembly. The torque sensing structure is used to sense the torque between the permanent magnet rotor assembly and the output shaft and drive the conduction disk to move according to the sensed torque. The conduction disk drives the permanent magnet rotor assembly to move and change the air gap between the permanent magnet rotor assembly and the armature stator.

[0011] Further, the torque sensing structure includes an output disc, the output disc is fixedly connected to the output shaft, an internal gear is fixedly connected to the output disc, a transmission gear is rotatably connected to the output disc, and the transmission gear is meshingly connected to the internal gear;

[0012] The conducting disc comprises an adjusting plate and a threaded rod, one end of the threaded rod is fixedly connected to the transmission gear, and the adjusting plate is threadedly connected to the threaded rod.

[0013] Furthermore, the permanent magnet rotor assembly comprises a moving disk and a fixing frame, one end of the threaded rod away from the transmission gear is rotatably connected to the fixing frame, and a torsion spring is installed at the rotation point between the fixing frame and the threaded rod.

[0014] Furthermore, a connecting sleeve is fixedly connected to the movable disk, and transmission sliding grooves are provided inside the movable disk and the connecting sleeve.

[0015] Furthermore, the connecting sleeve is fixedly connected to the transmission shaft at a side close to the adjustment plate, and the transmission shaft is fixedly connected to the adjustment plate.

[0016] Furthermore, the transmission gears are provided in three groups and are all meshed with the internal gear, the middle of the output disc is rotatably connected to the stabilizing gear, and the stabilizing gear is provided in the middle of the three groups of transmission gears and is meshed with the three groups of transmission gears.

[0017] Furthermore, a connecting rod is fixedly connected between the movable plate and the fixed frame.

[0018] Furthermore, a rotating shaft is rotatably connected to the motor frame, and the rotating shaft includes a rotating shaft and a flower shaft. The rotating shaft is rotatably connected to the motor frame, and the flower shaft is fixedly connected to the rotating shaft.

[0019] Furthermore, the flower shaft is slidably connected inside the transmission slide groove.

[0020] The beneficial effects achieved by the present invention using the above structure are as follows:

[0021] (1) In order to solve the problem that the output torque of the traditional motor cannot change adaptively with the load, resulting in energy waste, the present invention provides an air gap adjustment component and a permanent magnet rotor component, so that the air gap between the stator and the rotor can change with the load in a variable load working environment, thereby changing the excitation strength of the motor and achieving energy saving of the motor;

[0022] (2) The torque transmitted by the permanent magnet rotor assembly to the air gap adjustment assembly reacts on the axial movement of the permanent magnet rotor assembly, thereby establishing a connection between the air gap size between the permanent magnet rotor assembly and the armature stator and the output torque of the motor, so that the air gap size of the motor can change with the change of the load and can adapt to the changing load. When the load is small, the air gap is increased and the motor output power is reduced to achieve energy saving; when the load increases, the air gap is reduced and the motor output torque is increased, so that the motor output torque and the load force reach a relative balance, which effectively solves the problem that the traditional motor cannot adaptively adjust the torque and power when the load changes, resulting in energy waste;

[0023] (3) In addition, the torque sensing structure can accurately sense the torque between the permanent magnet rotor assembly and the output shaft through the meshing transmission of the internal gear, the transmission gear and the stabilizing gear, and convert the torque change into the movement of the adjustment plate, thereby driving the permanent magnet rotor assembly to move and change the air gap. The sensing and adjustment accuracy is high, which helps to improve the overall operating efficiency and energy saving effect of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the internal structure of an energy-saving device for adaptively adjusting motor torque proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the exploded structure of an energy-saving device for adaptively adjusting motor torque proposed by the present invention;

[0026] Figure 3 A schematic diagram of the local structure of an energy-saving device for adaptively adjusting motor torque proposed by the present invention Figure 1 ;

[0027] Figure 4 A schematic diagram of the local structure of an energy-saving device for adaptively adjusting motor torque proposed by the present invention Figure 2 ;

[0028] Figure 5 It is a schematic diagram of the local structure of the permanent magnet rotor assembly;

[0029] Figure 6 The interior of an energy-saving device for adaptively adjusting motor torque proposed by the present invention.

[0030] Among them, 1. motor frame; 2. rotating shaft; 3. output shaft; 4. air gap adjustment assembly; 5. permanent magnet rotor assembly; 6. armature stator; 21. rotating shaft; 22. flower shaft; 41. torque sensing structure; 42. conduction disk; 411. output disk; 412. internal gear; 413. transmission gear; 414. stabilizing gear; 421. adjustment plate; 422. threaded rod; 51. moving disk; 52. connecting rod; 53. connecting sleeve; 54. transmission shaft; 55. transmission slide groove; 56. fixing frame; 57. clearance hole; 58. torsion spring.

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] like Figure 1-Figure 6 As shown, the present invention proposes an energy-saving device for adaptively adjusting motor torque, comprising a motor frame 1;

[0035] The armature stator 6 fixed on the inner circumference of the motor frame 1 is composed of an iron core and windings and is used to generate a rotating magnetic field;

[0036] The permanent magnet rotor assembly 5 rotating in the motor frame 1 is used to interact with the rotating magnetic field of the armature stator 6 to generate a rotating torque. The armature stator 6 is composed of an iron core and windings. When current is passed through, according to the principle of electromagnetic induction, a periodically changing magnetic field will be generated in the windings. This magnetic field will interact with the permanent magnet rotor assembly 5. The permanent magnets in the permanent magnet rotor assembly 5 have fixed magnetic poles. Under the action of the magnetic field of the armature stator, they will be driven by the Ampere force to generate a rotation trend, thereby driving the entire permanent magnet rotor assembly 5 to rotate;

[0037] The output shaft 3 connected to the motor frame 1 is rotated, and the output shaft 3 is used to output the torque of the permanent magnet rotor assembly 5;

[0038] An air gap adjustment component 4, which is mounted on the output shaft 3 and connected to the permanent magnet rotor component 5, and is used to adjust the air gap between the permanent magnet rotor component 5 and the armature stator 6;

[0039] The air gap adjustment component 4 includes a torque sensing structure 41 installed on the output shaft 3 and a conduction disk 42 installed on the permanent magnet rotor component 5. The torque sensing structure 41 is used to sense the torque between the permanent magnet rotor component 5 and the output shaft 3 and drive the conduction disk 42 to move according to the sensed torque. The conduction disk 42 drives the permanent magnet rotor component 5 to move and change the air gap between the permanent magnet rotor component 5 and the armature stator 6.

[0040] The torque sensing structure 41 includes an output disc 411, which is fixedly connected to the output shaft 3, an internal gear 412 is fixedly connected to the output disc 411, a transmission gear 413 is rotatably connected to the output disc 411, and the transmission gear 413 is meshed with the internal gear 412;

[0041] The conducting plate 42 includes an adjusting plate 421 and a threaded rod 422 . One end of the threaded rod 422 is fixedly connected to the transmission gear 413 . The adjusting plate 421 is threadedly connected to the threaded rod 422 .

[0042] In addition, the permanent magnet rotor assembly 5 includes a movable disk 51 and a fixed frame 56. The movable disk 51 is a permanent magnet with fixed magnetic poles. The end of the threaded rod 422 away from the transmission gear 413 is rotatably connected to the fixed frame 56, and a torsion spring 58 is installed at the rotation point between the fixed frame 56 and the threaded rod 422. A clearance hole 57 is opened in the middle of the fixed frame 56 for allowing the transmission shaft 54 ​​to pass through the fixed frame 56.

[0043] In this embodiment, a connecting sleeve 53 is fixedly connected to the movable disk 51, and transmission grooves 55 are provided inside the movable disk 51 and the connecting sleeve 53. The connecting sleeve 53 is fixedly connected to the transmission shaft 54 ​​on the side close to the adjustment plate 421, and the transmission shaft 54 ​​is fixedly connected to the adjustment plate 421.

[0044] There are three groups of transmission gears 413 and all of them are meshed with the internal gear 412 . The middle of the output disc 411 is rotatably connected to the stabilizing gear 414 . The stabilizing gear 414 is located in the middle of the three groups of transmission gears 413 and is meshed with all of them.

[0045] A connecting rod 52 is fixedly connected between the movable plate 51 and the fixed frame 56 .

[0046] A rotating shaft 2 is rotatably connected to the motor frame 1, and the rotating shaft 2 includes a rotating shaft 21 and a flower shaft 22. The rotating shaft 21 is rotatably connected to the motor frame 1, and the flower shaft 22 is fixedly connected to the rotating shaft 21; the flower shaft 22 is slidably connected to the inside of the transmission slide groove 55, and the flower shaft 22 of the rotating shaft 2 is slidably connected to support the rotation of the permanent magnet rotor assembly 5. At the same time, it plays a guiding and limiting function during the air gap adjustment process, ensuring that the permanent magnet rotor assembly 5 can only move in a specific direction, thereby accurately adjusting the air gap between the armature stator 6.

[0047] Specific use and working principle: After the motor is powered on, a periodically changing magnetic field is generated in the armature stator 6, which then drives the permanent magnet rotor assembly 5 to rotate under the action of electromagnetic force. The torque generated by the rotation of the permanent magnet rotor assembly 5 drives the output shaft 3 to rotate through the air gap adjustment assembly 4, thereby achieving torque output;

[0048] When the load on the output shaft 3 is small, since the torque output by the output shaft 3 is not large, under the elastic force of the torsion spring 58, the threaded rod 422 rotates so that the adjustment plate 421 is close to the internal gear 412, and then the permanent magnet rotor assembly 5 connected to the adjustment plate 421 is between the armature stator 6. At this time, the air gap between the rotor and the stator is large, and the output power of the motor is low, thereby achieving energy saving;

[0049] When the load on the output shaft 3 increases, at this time, due to the large output torque of the output shaft 3, the torque of the output shaft 3 causes the torque sensing structure 41 to rotate relative to the permanent magnet rotor assembly 5. At this time, the torque transmitted between the permanent magnet rotor assembly 5 and the air gap adjustment assembly 4 overcomes the elastic force of the torsion spring 58, and the internal gear 412 drives the transmission gear 413 to rotate, thereby driving the threaded rod 422 to rotate so that the adjustment plate 421 moves, changing the position between the permanent magnet rotor assembly 5 and the armature stator 6, so that the air gap between the rotor and the stator is reduced, achieving high power output of the motor, and then increasing the output torque. In this process, the output torque and the load force reach a relative balance.

[0050] Furthermore, when the motor load changes, the motor output torque can automatically change the size of the air gap between the stator and the rotor, achieving adaptive adjustment of the torque and saving energy consumption.

[0051] The above is the overall workflow of the present invention.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0054] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An energy-saving device for adaptively adjusting motor torque, characterized in that: It comprises a motor frame (1); An armature stator (6) fixed on the inner circumference of the motor frame (1), composed of an iron core and windings, for generating a rotating magnetic field; A permanent magnet rotor assembly (5) rotates in the motor frame (1) and is used to interact with the rotating magnetic field of the armature stator (6) to generate a rotating torque; An output shaft (3) rotatably connected to the motor frame (1), wherein the output shaft (3) is used to output the torque of the permanent magnet rotor assembly (5); An air gap adjustment component (4), the air gap adjustment component (4) being mounted on the output shaft (3) and connected to the permanent magnet rotor component (5), and being used for adjusting the air gap between the permanent magnet rotor component (5) and the armature stator (6); The air gap adjustment component (4) comprises a torque sensing structure (41) mounted on the output shaft (3) and a conductive disk (42) mounted on the permanent magnet rotor component (5). The torque sensing structure (41) is used to sense the magnitude of the torque between the permanent magnet rotor component (5) and the output shaft (3) and drive the conductive disk (42) to move according to the sensed torque. The conductive disk (42) drives the permanent magnet rotor component (5) to move and change the air gap between the permanent magnet rotor component (5) and the armature stator (6).

2. The energy-saving device for adaptively adjusting motor torque according to claim 1, characterized in that: The torque sensing structure (41) comprises an output disc (411), the output disc (411) is fixedly connected to the output shaft (3), an internal gear (412) is fixedly connected to the output disc (411), a transmission gear (413) is rotatably connected to the output disc (411), and the transmission gear (413) is meshingly connected to the internal gear (412); The conducting disk (42) comprises an adjusting plate (421) and a threaded rod (422), one end of the threaded rod (422) is fixedly connected to the transmission gear (413), and the adjusting plate (421) is threadedly connected to the threaded rod (422).

3. The energy-saving device for adaptively adjusting motor torque according to claim 2, characterized in that: The permanent magnet rotor assembly (5) comprises a moving disk (51) and a fixed frame (56); one end of the threaded rod (422) away from the transmission gear (413) is rotatably connected to the fixed frame (56); and a torsion spring (58) is installed at the rotation point between the fixed frame (56) and the threaded rod (422).

4. The energy-saving device for adaptively adjusting motor torque according to claim 3, characterized in that: A connecting sleeve (53) is fixedly connected to the movable plate (51), and transmission sliding grooves (55) are provided inside the movable plate (51) and the connecting sleeve (53).

5. The energy-saving device for adaptively adjusting motor torque according to claim 4, characterized in that: The connecting sleeve (53) is fixedly connected to the transmission shaft (54) at a side close to the adjustment plate (421), and the transmission shaft (54) is fixedly connected to the adjustment plate (421).

6. The energy-saving device for adaptively adjusting motor torque according to claim 5, characterized in that: The transmission gears (413) are provided in three groups and are all meshed with the internal gear (412). The middle part of the output disc (411) is rotatably connected to the stabilizing gear (414). The stabilizing gear (414) is provided in the middle of the three groups of transmission gears (413) and is meshed with the three groups of transmission gears (413).

7. The energy-saving device for adaptively adjusting motor torque according to claim 6, characterized in that: A connecting rod (52) is fixedly connected between the movable plate (51) and the fixed frame (56).

8. The energy-saving device for adaptively adjusting motor torque according to claim 7, characterized in that: A rotating shaft (2) is rotatably connected to the motor frame (1), and the rotating shaft (2) comprises a rotating shaft (21) and a flower shaft (22). The rotating shaft (21) is rotatably connected to the motor frame (1), and the flower shaft (22) is fixedly connected to the rotating shaft (21).

9. The energy-saving device for adaptively adjusting motor torque according to claim 8, characterized in that: The flower shaft (22) is slidably connected inside the transmission slide groove (55).

Images