CN115395717A - Damping rotor and motor - Google Patents

Abstract

The invention discloses a damping rotor and a motor, wherein the damping rotor comprises an inner rotor iron core, an outer rotor iron core and a damping piece; the inner rotor iron core is provided with a plurality of outer teeth along the axial direction of the outer wall of the inner rotor iron core; the outer rotor iron core is sleeved on the outer side of the inner rotor iron core, and a plurality of inner teeth are arranged along the axial direction of the inner wall of the outer rotor iron core, wherein the inner teeth are meshed with the outer teeth; the shock absorption piece is filled between the inner rotor iron core and the outer rotor iron core; wherein, the external tooth with at least one side face that the internal tooth engaged with is the non-even surface, is used for right the damper carries out spacingly. The invention can avoid the shock absorption piece from falling off and reduce the potential safety hazard.

Description

Damping rotor and motor

Technical Field

The invention relates to the technical field of rotors, in particular to a damping rotor and a motor.

Background

The surface-mounted damping rotor is usually used for a commercial motor due to high safety performance, however, the volume of the commercial motor is generally small, so that the controllable space of the damping rotor is small, and the damping rubber is easy to deform locally and fall off under the conditions of large-range speed change and sudden stop of the motor in the conventional surface-mounted damping rotor, so that potential safety hazards exist.

Disclosure of Invention

The invention provides a damping rotor and a motor, which can prevent a damping part from falling off, improve the stability of the rotor and reduce potential safety hazards.

In a first aspect, the present invention provides a damping rotor, which includes an inner rotor core, an outer rotor core and a damping member; the inner rotor iron core is provided with a plurality of external teeth along the axial direction of the outer wall of the inner rotor iron core; the outer rotor iron core is sleeved on the outer side of the inner rotor iron core, and a plurality of inner teeth are arranged along the axial direction of the inner wall of the outer rotor iron core, wherein the inner teeth are meshed with the outer teeth; the vibration reduction piece is filled between the inner rotor iron core and the outer rotor iron core; at least one side face of the outer teeth meshed with the inner teeth is a non-flat face and used for limiting the damping piece.

Further, the external teeth and the internal teeth both comprise a first side face and a second side face, and the first side face and the second side face are both V-shaped.

Further, the first side surface and the second side surface both comprise a first sub-surface and a second sub-surface, and an included angle is formed between the first sub-surface and the second sub-surface, wherein the included angle is not greater than 20 °.

Further, the area of the first sub-surface is the same as the area of the second sub-surface.

Further, the external teeth and the internal teeth are provided with a plurality of chamfers, and each chamfer is the same.

Further, the radial clearance distance between the inner rotor iron core and the outer rotor iron core is the same.

Further, the axial gap distance between the inner rotor iron core and the outer rotor iron core is the same.

Further, the opening orientations of the first side face and the second side face are the same.

Further, the number of the outer teeth and the number of the inner teeth are both five.

In a second aspect, the invention also provides an electric machine comprising a damped rotor according to any one of the above.

According to the damping rotor and the motor provided by the invention, at least one side surface of the external teeth meshed with the internal teeth is set to be the V-shaped surface, so that the contact area between the internal teeth and the external teeth and the damping piece is increased, and meanwhile, the damping piece can be limited, so that when the rotor is in a high-speed rotation state, a buckling interaction force is generated, the damping piece can be prevented from falling off from the internal teeth and the external teeth, the potential safety hazard is reduced, and the stability is improved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is an assembly view of a damped rotor in accordance with one embodiment of the present invention;

fig. 2 to 4 are sectional top views of a damping rotor according to an embodiment of the present invention;

fig. 5 is a structural diagram of an inner rotor core of a vibration-damping rotor according to an embodiment of the present invention;

fig. 6 is a structural view of an outer rotor core of a vibration-damping rotor according to an embodiment of the present invention;

fig. 7 is a schematic view of a back-buckling structure of a damping rotor according to an embodiment of the present invention;

fig. 8 is a comparison diagram of internal teeth (external teeth) of a vibration-damped rotor according to an embodiment of the present invention and internal teeth (external teeth) of a conventional vibration-damped rotor.

Reference numerals are as follows: 100. a damping rotor; 10. an inner rotor core; 11. an outer tooth; 20. an outer rotor core; 21. Internal teeth; 30. a shock absorbing member; 40. a first side surface; 41. a second side surface; 42. a first sub-surface; 43. a second sub-surface; 50. a magnetic shoe; 60. chamfering; 70. a plastic component.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1 to 7, fig. 1 is an assembly view of a vibration-damping rotor 100 according to an embodiment of the present invention; fig. 2 to 4 are top sectional views of a damper rotor 100 according to an embodiment of the present invention; fig. 5 is a structural view of an inner rotor core 10 of the vibration absorbing rotor 100 according to an embodiment of the present invention; fig. 6 is a structural view of outer rotor core 20 of vibration-damping rotor 100 according to an embodiment of the present invention; fig. 7 is a schematic view of a back-buckling structure of the damping rotor 100 according to an embodiment of the present invention.

As shown in fig. 1, 5 and 6, the damper rotor 100 according to the present invention includes an inner rotor core 10, an outer rotor core 20 and a damper 30; the inner rotor core 10 is provided with a plurality of outer teeth 11 along the axial direction of the outer wall of the inner rotor core 10; the outer rotor core 20 is sleeved outside the inner rotor core 10, and a plurality of inner teeth 21 are arranged along the axial direction of the inner wall of the outer rotor core 20, wherein the inner teeth 21 are meshed with the outer teeth 11; the damper 30 is filled between the inner rotor core 10 and the outer rotor core 20; at least one side surface of the external teeth 11 meshed with the internal teeth 21 is an uneven surface, and is used for limiting the shock absorbing part 30.

Specifically, the inner rotor core 10 may include a plurality of outer teeth 11, the outer rotor core 20 may include a plurality of inner teeth 21, for example, the inner rotor core 10 includes five outer teeth 11, the outer rotor core 20 includes five inner teeth 21, and the outer teeth 11 of the inner rotor core 10 and the inner teeth 21 of the outer rotor core 20 are engaged with each other, a damping member 30 is filled in a gap between the inner rotor core 10 and the outer rotor core 20, the damping member 30 may be a damping rubber, and in addition to the above structure, the damping rotor 100 provided in the present invention may further include structural members commonly used in the art, such as a magnetic shoe 50, a plastic member 70, and the like. The side surfaces of the external teeth 11 and the internal teeth 21 which are engaged with each other are uneven surfaces which may be, for example, V-shaped surfaces or folded surfaces for increasing the contact area. As shown in fig. 1, 4 and 5, if one side surface of the external teeth 11 and the internal teeth 21 which are engaged with each other is a V-shaped surface, for example, both the two side surfaces which are engaged with each other are V-shaped surfaces, the contact surface between the internal teeth 21 and the cushion rubber and the contact surface between the external teeth 11 and the cushion rubber are changed from one contact surface to two contact surfaces. As shown in fig. 7, fig. 7 shows one side surface of the external teeth 11 meshing with the internal teeth 21, one side surface of the internal teeth 21 and one side surface of the external teeth 11 form a snap-back type double V structure, and the damper 30 is located between the internal teeth 21 and the external teeth 11. As shown in fig. 8, fig. 8 (a) is a schematic structural diagram of the internal teeth 21 or the external teeth 11 used in the conventional rotor, fig. 8 (b) is a schematic structural diagram of the internal teeth 21 or the external teeth 11 provided by the present invention, and it can be known from fig. 8 that if the side length of the side contact surface of the conventional rotor is 2a, and the V-shaped side of the V-shaped surface provided by the present invention is located on the center line of the side length of the conventional side contact surface, the side length of the side contact surface provided by the present invention is 2a

Then the corresponding contact area is the original

Under the condition of unchanged working condition, the stress of the corresponding contact surface is reduced to be original

As a further example, the outer teeth 11 and the inner teeth 21 each include a first side 40 and a second side 41, and the first side 40 and the second side 41 are each V-shaped.

As shown in fig. 2, the inner teeth 21 and the outer teeth 11 each include a first side surface 40, a second side surface 41, and a top surface, and for the inner rotor core 10 and the outer rotor core 20 that are engaged with each other, each inner tooth 21 is engaged with two adjacent outer teeth 11, that is, the first side surface 40 of one inner tooth 21 is engaged with the first side surface 40 of the previous outer tooth 11, and the second side surface 41 of the inner tooth 21 is engaged with the second side surface 41 of the next outer tooth 11, then for the inner rotor core 10 including five outer teeth 11 and the outer rotor core 20 including five inner teeth 21, ten snap-back double V structures may be formed, so as to further improve the stability of the rotor.

As a further example, each of the first side surface 40 and the second side surface 41 includes a first sub-surface 42 and a second sub-surface 43, and an included angle a is formed between the first sub-surface 42 and the second sub-surface 43, wherein the included angle a is not greater than 20 °.

Wherein, as shown in fig. 7, the first sub-surface 42 and the second sub-surface 43 form an included angle a therebetween, which is not greater than 20 °, for example, the included angle a may be 15 °.

As a further example, the area of the first sub-surface 42 is the same as the area of the second sub-surface 43.

The areas of the first sub-surface 42 and the second sub-surface 43 are the same, so that the contact areas between the external teeth 11 and the damper 30 and between the internal teeth 21 and the damper 30 are uniformly distributed.

As a further example, the external teeth 11 and the internal teeth 21 are each provided with a plurality of chamfers 60, and each of the chamfers 60 is identical.

However, as shown in fig. 3, the edges and corners of the internal teeth 21 and the external teeth 11 may be chamfered 60, thereby further improving the stability in the high-speed rotation state. The angle and length of the chamfers 60 on the different outer and inner teeth 11, 21 are the same to provide stability.

As a further example, the radial gap distance between the inner rotor core 10 and the outer rotor core 20 is the same.

As a further example, the axial gap distance between the inner rotor core 10 and the outer rotor core 20 is the same.

Wherein, as shown in fig. 4, the gap distance between h1 and h2 is the same, and the gap distance between h3 and h4 is the same, to improve stability at high speed rotation.

As a further example, the opening orientations of the first side surface 40 and the second side surface 41 are the same.

Wherein, first side 40 and second side 41 are the V profile, and the opening orientation of V profile is the same, as shown in fig. 7, and the opening all faces the right side, and the opening orientation of V profile is unanimous, can improve the spacing effect to damper 30.

As a further example, the number of the outer teeth 11 and the number of the inner teeth 21 are both five.

The number of the internal teeth 21 and the external teeth 11 may be set according to actual conditions. In practical use, the space of the motor is usually fixed, and a certain trade-off needs to be made between the size and the number of the gears, that is, the larger the number of the gears is, the smaller the size of a single gear is, and the formula is 360 °/Y = X, where X is the number of the gears, Y is the angle of the motor space occupied by the single gear, and for iron cores of five gears, X is 72 °.

The invention also discloses a motor which comprises the damping rotor.

According to the invention, the side surface where the external teeth and the internal teeth are meshed is set to be the V-shaped surface, so that the contact area of the damping piece with the external teeth and the internal teeth is increased, meanwhile, the damping piece is limited through the back-buckling type double-V structure, the damping piece is prevented from falling off, and the potential safety hazard is reduced.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within 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 damped rotor, comprising:

the inner rotor iron core is provided with a plurality of external teeth along the axial direction of the outer wall of the inner rotor iron core;

the outer rotor iron core is sleeved on the outer side of the inner rotor iron core, and a plurality of inner teeth are arranged along the axial direction of the inner wall of the outer rotor iron core, wherein the inner teeth are meshed with the outer teeth;

the damping piece is filled between the inner rotor iron core and the outer rotor iron core;

wherein, the external tooth with at least one side face that the internal tooth engaged with is the non-even surface, is used for right the damper carries out spacingly.

2. The damped rotor of claim 1 wherein said outer teeth and said inner teeth each include a first side and a second side, and wherein said first side and said second side are each V-shaped.

3. The damped rotor of claim 2 wherein said first side surface and said second side surface each include a first sub-surface and a second sub-surface, said first sub-surface forming an included angle with said second sub-surface, wherein said included angle is no greater than 20 °.

4. The damped rotor of claim 3 wherein the area of said first sub face is the same as the area of said second sub face.

5. The damped rotor according to claim 1 wherein said outer teeth and said inner teeth are each provided with a plurality of chamfers, and each of said chamfers is identical.

6. The damped rotor of claim 1 wherein the radial gap distance between said inner rotor core and said outer rotor core is the same.

7. The damped rotor of claim 6 wherein the axial gap distance between said inner rotor core and said outer rotor core is the same.

8. The damped rotor of claim 2 wherein the openings of the first side and the second side are all oriented the same.

9. The damped rotor of claim 1 wherein said number of outer teeth and said number of inner teeth are each five.

10. An electrical machine comprising a damped rotor according to any one of claims 1 to 9.

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