Rotor and motor

Abstract

The utility model provides a rotor and a motor, and relates to the technical field of motors. The rotor comprises a shaft body assembly, a plurality of magnets and at least one hoop, wherein the shaft body assembly is provided with an axis; the magnets are arranged at intervals in the circumferential direction of the shaft body assembly and attached to the outer circumferential face of the shaft body assembly. The hoop is arranged on the peripheral surface of each magnet in a sleeving manner and is used for clamping each magnet; and each hoop is provided with a concave part which is located between any two adjacent magnets, and the concave parts are concave towards the direction of the axis. According to the technical scheme, the hoops used for clamping the magnets are arranged on the peripheral faces of the magnets in the sleeving mode, the magnets can be tightly attached to the peripheral face of the shaft body assembly, then the hoops clamp the magnets, the restraining force of the hoops on the magnets is increased through the concave parts in the hoops, and therefore the magnets are fixed, and when the motor runs at a high speed, the motor is not damaged. The magnets are firmly installed and are difficult to loosen and fall off, and safety accidents caused by loosening and falling off of the magnets are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a rotor and a motor. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy into mechanical energy based on the law of electromagnetic induction. As an important power device, the motor is widely used in household appliances, production, the automotive industry, aerospace, medical equipment and other fields.

[0003] The motor usually includes a rotor and a stator, wherein the rotor is the rotating part of the motor. The rotor usually includes a shaft assembly and a magnet. The shaft assembly includes a rotating shaft and a sleeve mounted on the rotating shaft. The magnet of the rotor is attached to the outer surface of the sleeve.

[0004] However, when the motor runs at high speed, the magnets are prone to loosen and fall off, causing safety accidents. Utility Model Content

[0005] The present application provides a rotor and a motor, which are used to solve the technical problem in the above-mentioned related technologies that magnets are easy to loosen and fall off, causing safety accidents.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] In one aspect, the present application provides a rotor, comprising a shaft assembly, wherein the shaft assembly has an axis;

[0008] A plurality of magnets, each of which is spaced apart along the circumferential direction of the shaft assembly, and each of which is evenly attached to the outer circumferential surface of the shaft assembly;

[0009] At least one clamp, which is sleeved on the outer circumference of each magnet and is used to clamp each magnet;

[0010] The clamp has a recessed portion, the recessed portion is located between any two adjacent magnets, and the recessed portion is recessed in the direction of the axis.

[0011] Based on the above technical solution, the present application can also be improved as follows:

[0012] In a possible implementation, the recessed portion includes a first recessed portion and a second recessed portion, and the first recessed portion and the second recessed portion are respectively located at two edges of the clamp along the axial direction;

[0013] In a possible implementation, in the direction toward the axis, the projection shapes of the first recessed portion and the second recessed portion are both polygonal, circular or semicircular, and the polygon may be, for example, a triangle or a rectangle, etc., or in some examples, the projection shapes of the first recessed portion and the second recessed portion may also be other shapes, such as an ellipse or other irregular shapes as long as they are concave toward the magnet.

[0014] In a possible implementation, the rotor further includes a filler, and the gaps between the first recessed portion and the second recessed portion and the magnet are provided with the filler to isolate and bond the clamp and the magnets.

[0015] In a possible implementation manner, the filler includes epoxy resin.

[0016] In a possible implementation, there are two clamps, and the two clamps are respectively located at two ends of the magnet along the axial direction.

[0017] In a possible implementation, the thickness of the clamp is 0.25-0.5 mm, and the length of the clamp along the axial direction is 5-8 mm.

[0018] In a possible implementation, the clamp is made of stainless steel.

[0019] On the other hand, the present application provides a motor, comprising the rotor in any one of the above items.

[0020] The rotor and motor provided by the present application have the following beneficial effects:

[0021] By arranging the magnets at intervals along the circumferential direction of the shaft assembly, and each magnet is attached to the outer peripheral surface of the shaft assembly, the magnets are installed on the outer peripheral surface of the shaft assembly, and by sleeve-arranging at least one clamp for clamping each magnet on the outer peripheral surface of each magnet, the magnets can be tightly attached to the outer peripheral surface of the shaft assembly, and when the motor is running, the centrifugal force on each magnet is restrained by the clamp. By arranging a recessed portion on the clamp between any two adjacent magnets, and the recessed portion is recessed toward the axial direction of the shaft assembly, the radial restraining force of the clamp on the magnet is increased, and the clamp is further tightened by the recessed portion, so that the force of the clamp on the magnet is enhanced, thereby preventing the magnet from falling off the shaft assembly. Compared with the related art in which the magnets are attached to the outer surface of the shaft assembly, the rotor and motor provided in the present application clamp the magnets through a clamp and increase the radial constraint force of the clamp on the magnets through a recessed portion, thereby strengthening the connection strength between the magnets and the shaft assembly. When the motor is running at high speed, the magnets can be firmly installed and difficult to loosen and fall off, thereby avoiding safety accidents caused by loosening and falling off of the magnets. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a rotor structure provided in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 100-shaft assembly;

[0026] 110-shaft core; 111-axis line; 120-shaft sleeve;

[0027] 200-magnet;

[0028] 300-clamp;

[0029] 310 - recessed portion; 311 - first recessed portion; 312 - second recessed portion;

[0030] 400 - filler. DETAILED DESCRIPTION

[0031] When the motor is running at high speed, the magnet is easy to loosen and fall off, causing a safety accident. The reason for this problem is that in the relevant technology, the magnet is attached to the outer surface of the sleeve of the shaft assembly. When the motor is running at high speed, the magnet rotates at high speed along the axis of the shaft assembly, forming centrifugal force. Although the magnet is mounted on the sleeve, when the centrifugal force is greater than the fixing force between the magnet and the sleeve, the magnet is easy to loosen and fall off, which in turn causes a safety accident.

[0032] In response to the above technical problems, an embodiment of the utility model provides a rotor and a motor, by sleeved at least one clamp for clamping each magnet on the outer circumferential surface of each magnet, so that each magnet can be tightly fitted on the outer circumferential surface of the shaft assembly, and by providing a recessed portion on the clamp that is recessed toward the axis of the shaft assembly, and the recessed portion is located between any two adjacent magnets, the restraining force of the clamp on each magnet is further increased, so that when the motor is running at high speed, the magnets are firmly installed and are difficult to loosen and fall off, thereby avoiding safety accidents caused by loosening and falling off of the magnets.

[0033] In order to make the above-mentioned purposes, features and advantages of the embodiments of the utility model more obvious and easy to understand, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of this application.

[0034] refer to Figure 1 The present invention provides a rotor, including a shaft assembly 100, a plurality of magnets 200 and at least one clamp 300. The shaft assembly 100 is the main structure of the rotor. Figure 1 As shown, the shaft assembly 100 includes a shaft core 110 and a shaft sleeve 120. The shaft core 110 is used to transmit torque. The shaft sleeve 120 is sleeved on the shaft core 110 and fixed. When the motor is running, the shaft sleeve 120 moves in the same direction as the shaft core 110. The shaft sleeve 120 is used for magnetic conduction. The shaft assembly 100 has an axis 111, as shown in FIG. Figure 1 As shown, the axis 111 is the central axis of the shaft core 110 .

[0035] Each magnet 200 is a part of the magnetic circuit in the motor. Through the magnetic flux lines of each magnet 200, a first rotating magnetic field is formed in the motor. When the stator coil in the motor is energized, a second rotating magnetic field is formed on the stator. An attractive force or a repulsive force is formed between the first rotating magnetic field and the second rotating magnetic field, causing the rotor to rotate. Figure 1 As shown, each magnet 200 is arranged at intervals along the circumferential direction of the shaft assembly 100, so as to form a first magnetic field. Each magnet 200 is attached to the outer circumferential surface of the shaft assembly 100, for example, each magnet 200 is fixed to the outer circumferential surface of the shaft sleeve 120 of the shaft assembly 100 by adhesive bonding. Thus, each magnet 200 and the shaft assembly 100 rotate in the same direction. Usually, the number of magnets 200 is an even number, such as two, four, six or more, such as Figure 1 As shown, in the embodiment of the present application, there are four magnets 200. The magnets 200 can be ferrite magnets, neodymium iron boron magnets, samarium cobalt magnets, aluminum nickel cobalt magnets, iron chromium cobalt magnets, and the like.

[0036] like Figure 1As shown, the clamp 300 is used to clamp each magnet 200, and the number of the clamp 300 is at least one, for example, the clamp 300 can be provided with one, two, three or more. In the embodiment of the present application, the number of the clamp is two. The clamp 300 is sleeved on the outer peripheral surface of each magnet 200, and the clamp 300 is an annular hoop, and the inner wall of the annular hoop is crimped on the outer peripheral surface of each magnet 200, thereby clamping each magnet 200, so that each magnet 200 can be fastened to the outer peripheral surface of the shaft assembly 100, and the clamp 300 can constrain the centrifugal force on the magnet 200 when the motor is running.

[0037] refer to Figure 1 The clamp 300 has a recessed portion 310, which is located between any two connected magnets 200. The recessed portion 310 is recessed in the direction of the axis 111. For example, between any two adjacent magnets 200, the clamp 300 is pressed or knocked in the direction of the axis 111 to form the recessed portion 310. The recessed portion 310 can enhance the structural strength of the clamp 300 on the one hand, and increase the radial constraint force of the clamp 300 on each magnet 200 on the other hand, so that the connection between the magnet 200 and the clamp 300 is more secure.

[0038] When the motor runs at high speed, the magnet 200 rotates at high speed along the axis 111 of the shaft assembly 100. The magnet 200 has a centrifugal force away from the axis 111. Each magnet 200 has the fixing force of the shaft assembly 100 on the magnet 200 and the restraining force of the clamp 300 on the magnet 200. Both the fixing force and the restraining force can resist the centrifugal force of the magnet 200, thereby preventing the magnet 200 from loosening and falling off, avoiding safety accidents caused by the loosening and falling off of the magnet 200. The embodiment of the present application provides a rotor, wherein the magnets 200 are arranged at intervals along the circumferential direction of the shaft assembly 100, and the magnets 200 are attached to the outer peripheral surface of the shaft assembly 100, so that the magnets 200 are installed on the outer peripheral surface of the shaft assembly 100, and the clamps 300 used for clamping the magnets 200 are sleeved on the outer peripheral surface of the magnets 200, so that the magnets 200 can be tightly attached to the outer peripheral surface of the shaft assembly 100, and the clamps 300 are provided with a recessed portion 310 recessed toward the axis 111 of the shaft assembly 100, and the recessed portion 310 is located between any two adjacent magnets 200, so as to further increase the restraining force of the clamps 300 on the magnets 200. This prevents the magnets 200 from loosening and falling off, and avoids safety accidents caused by the loosening and falling off of the magnets 200.

[0039] Compared with the related art in which the magnet 200 is attached to the outer surface of the shaft assembly 100, the rotor provided in the embodiment of the present application clamps the magnet 200 by the clamp 300, thereby strengthening the connection strength between the magnet 200 and the shaft assembly 100, and providing a filler 400 for bonding between the clamp 300 and the magnet 200 to strengthen the connection strength between the clamp 300 and the magnet 200, thereby enabling the clamp 300 to clamp the magnet 200, so that the magnet 200 can be firmly installed when the motor is running at high speed, and it is difficult to loosen and fall off, thereby avoiding safety accidents caused by loosening and falling off of the magnet 200.

[0040] refer to Figure 1 In some embodiments, the recessed portion 310 includes a first recessed portion 311 and a second recessed portion 312. The first recessed portion 311 and the second recessed portion 312 are respectively located at two edges of the clamp 300 along the axis 111. Figure 1 As shown in the example, the first recessed portion 311 is located at the left edge of the clamp 300, and the second recessed portion 312 is located at the right edge of the clamp 300. Compared with only providing a recess on one side edge of the clamp 300, this solution can balance the force on the clamp 300 and prevent the clamp 300 from being damaged. It should be noted that the first recessed portion 311 can also be located at the right edge of the clamp 300, and the second recessed portion 312 can be located at the left edge of the clamp 300.

[0041] In the direction toward the axis 111, the projection shape of the first recessed portion 311 and the second recessed portion 312 can be a polygon, a circle or a semicircle. The polygon can be, for example, a triangle, a rectangle or a pentagon, etc., or in some examples, the projection shape of the first recessed portion and the second recessed portion can also be other shapes, such as an ellipse or other irregular shapes as long as they are concave toward the magnet. In the embodiment of the present application, the projection shape of the first recessed portion 311 and the second recessed portion 312 is a triangle as an example for explanation. In this way, the first recessed portion 311 and the second recessed portion 312 can be formed by pressing or tapping the clamp 300 at the corresponding position, and the formation method is simple and easy to operate.

[0042] refer to Figure 1 In some embodiments, a filler 400 is provided in the gap between the first recessed portion 311 and the second recessed portion 312 and the magnet 200, so that the filler 400 can bond the magnet 200 to the first recessed portion 311 and to the second recessed portion 312, thereby isolating and bonding the magnet 200 and the clamp 300, further enhancing the connection strength between the magnet 200 and the clamp 300 and preventing the magnet 200 from loosening and falling off.

[0043] like Figure 1As shown, the filler 400 is located between the clamp 300 and each magnet 200, filling the gap between the clamp 300 and each magnet 200, so that the filler 400 bonds the clamp 300 and each magnet 200, and the filler 400 can be various adhesives, such as epoxy glue, instant glue, silicone glue, acrylate glue, polyurethane glue, etc. By bonding the clamp 300 and each magnet 200 with the filler 400, the clamp 300 can be prevented from moving along the axis 111 and the magnets can be prevented from moving circumferentially along the shaft assembly 100, and the connection strength between the clamp 300 and each magnet 200 is enhanced, and the radial restraint force of the clamp 300 on the magnet 200 is improved. In addition, since the filler 400 adheres the clamp 300 and the magnets 200, when the clamp 300 is difficult to restrain the movement of the magnets 200 under the attraction or repulsion of the magnets 200, the filler 400 further limits the relative movement of the magnets 200, further preventing the magnets 200 from loosening and falling off, thereby avoiding safety accidents caused by the loosening and falling off of the magnets 200.

[0044] In some embodiments, the filler 400 includes epoxy resin. Epoxy resin is a type of polymer containing two or more epoxy groups in the molecule, and has high bonding strength, high structural strength, and good sealing performance, thereby achieving a bonding function. Epoxy resin can also gradually harden over time, thereby forming a strong and durable filler 400.

[0045] In some embodiments, each magnet 200 is adhered to the outer circumferential surface of the shaft assembly 100 by glue. Such a configuration can strengthen the connection strength between each magnet 200 and the shaft assembly 100. Since the clamp 300 is sleeved on the outer circumferential surface of each magnet 200 and is used to clamp each magnet 200, each magnet 200 can be constrained by the clamp 300. When the rotor is working, especially in a high temperature environment, the service life of the glue is increased.

[0046] refer to Figure 1 In some embodiments, the number of the clamps 300 is two, and the two clamps 300 are respectively located at the two ends of the magnet 200 along the axis 111. Figure 1 As shown in the example, one clamp 300 is located at the left end of the magnet 200, and the other clamp 300 is located at the right end of the magnet 200. Compared with clamping the magnet 200 with one clamp 300, the two clamps 300 in this solution have a greater restraining force on the magnet 200. Compared with clamping the magnet 200 with a sleeve sleeved on the outer circumference of the magnet 200, this solution is easy to install without having to sleeve the entire sleeve on the outside of the magnet 200.

[0047] In some embodiments, the thickness of the clamp 300 is 0.25-0.5 mm, such as 0.3 mm or 0.4 mm, and the thickness of the clamp 300 refers to the distance of the clamp 300 toward the axis 111. The length of the clamp 300 along the axis 111 is 5-8 mm, such as 6 mm or 7 mm. This arrangement can make the clamp 300 easy to operate during the processing and forming process.

[0048] In some embodiments, the clamp 300 is a clamp 300 made of stainless steel. Stainless steel has good physical properties and corrosion resistance, and can enhance the structural strength of the clamp 300. Stainless steel is a non-magnetic material, which can prevent the clamp 300 from interfering with the magnetic field in the rotor and the motor.

[0049] The present application also provides a motor, which can be a DC motor, such as a permanent magnet DC motor or a brushless DC motor, and the motor includes a rotor in any of the above embodiments, and the specific structure of the rotor is shown in the above embodiments. Since the motor adopts all the technical solutions of any of the above embodiments, it has at least all the beneficial effects brought by any of the above embodiments, which will not be described one by one here.

[0050] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0051] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0052] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0053] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0054] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotor, It is characterized in that include: A shaft assembly, wherein the shaft assembly has an axis; A plurality of magnets, each of which is spaced apart along the circumferential direction of the shaft assembly, and each of which is evenly attached to the outer circumferential surface of the shaft assembly; At least one clamp, which is sleeved on the outer circumference of each magnet and is used to clamp each magnet; Each of the clamps has a recessed portion, the recessed portion is located between any two adjacent magnets, and the recessed portion is recessed in the direction of the axis.

2. The rotor according to claim 1, It is characterized in that The recessed portion includes a first recessed portion and a second recessed portion, and the first recessed portion and the second recessed portion are respectively located at two edges of the clamp along the axial direction.

3. The rotor according to claim 2, It is characterized in that In the direction toward the axis, the projection shapes of the first recessed portion and the second recessed portion are both polygonal, circular or semicircular.

4. The rotor according to claim 2, It is characterized in that The rotor further comprises a filler, and the gaps between the first recessed portion and the second recessed portion and the magnets are provided with the filler to isolate and bond the clamp and the magnets.

5. The rotor according to claim 4, It is characterized in that The filler includes epoxy resin.

6. The rotor according to claim 1, It is characterized in that Each of the magnets is adhered to the outer peripheral surface of the shaft assembly by glue.

7. A rotor according to any one of claims 1 to 5, It is characterized in that The number of the clamps is two, and the two clamps are respectively located at two ends of the magnet along the axial direction.

8. A rotor according to any one of claims 1 to 5, It is characterized in that The thickness of the clamp is 0.25-0.5 mm, and the length of the clamp along the axial direction is 5-8 mm.

9. The rotor according to any one of claims 1 to 5, It is characterized in that The clamp is made of stainless steel.

10. A motor, It is characterized in that Comprising a rotor as described in any one of claims 1-9.

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