Motor and electric tool

Abstract

The utility model provides a motor and an electric tool. The motor comprises a housing, a rotor assembly and a stator assembly which are arranged in the housing, and a bearing frame which is arranged at one end, far away from the housing, of the rotor assembly. A bearing mounting chamber is formed in the shell and / or the bearing frame, and an annular groove is formed in the side wall of the bearing mounting chamber; the elastic piece is fixedly arranged in the annular groove; the bearing is arranged on the output shaft of the rotor assembly in a sleeving mode and located in the bearing installation chamber, and the elastic piece is located between the bearing chamber and the bearing. According to the utility model, when the motor runs, the generated vibration can be buffered by the elastic piece and the rubber pad, the vibration of the bearing can be reduced to be transmitted to the outside of the motor, the noise of the motor is effectively reduced, and meanwhile, the bearing can be adjusted to the optimal position in the bearing chamber because the bearing is not completely fixed when the motor runs, so that the smooth running of the motor is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a motor and a power tool. Background Technology

[0002] With the rapid development of small household appliance technology and the continuous improvement of people's living standards, some power tools, such as vacuum cleaners, have become essential appliances in people's daily lives. Among them, handheld vacuum cleaners are favored by people due to their convenient cleaning, small space occupation, and wide applicability. However, most existing motor bearing housings are fixed with glue, which is prone to failure, causing the bearing to detach and lose its fixation, resulting in motor failure. Moreover, the vibration of the motor operation can be transmitted to the outside of the motor through the bearing housing, causing the motor noise to be too high. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a motor and power tool to improve the problems of existing motor bearing housings being fixed by adhesive application, which may lead to bearing detachment and loss of fixation due to adhesive failure, thereby causing motor failure, and the vibration of motor operation being transmitted to the outside of the motor through the bearing housing, resulting in high motor noise.

[0004] To achieve the above-mentioned objectives and other related objectives, this utility model proposes a motor, comprising:

[0005] The housing, the rotor assembly and stator assembly disposed within the housing, and the bearing bracket located at the end of the rotor assembly away from the housing;

[0006] A bearing mounting chamber is formed within the housing and / or the bearing bracket, and an annular groove is provided on the side wall of the bearing mounting chamber;

[0007] An elastic element, which is fixedly installed in the annular groove;

[0008] The bearing is sleeved on the output shaft of the rotor assembly and located in the bearing mounting chamber, and the elastic element is located between the bearing mounting chamber and the bearing.

[0009] In a preferred embodiment of the present invention, at least two annular grooves are provided on the side wall of the bearing mounting chamber.

[0010] In a preferred embodiment of this utility model, the cross-section of the elastic element is circular, rectangular, or elliptical.

[0011] In a preferred embodiment of the present invention, the thickness of the elastic element is greater than the width of the annular groove along the axial direction of the elastic element.

[0012] In a preferred embodiment of the present invention, the thickness of the elastic element is greater than the depth of the annular groove along the radial direction of the elastic element.

[0013] In a preferred embodiment of this utility model, the inner diameter of the elastic element is smaller than the outer diameter of the bearing.

[0014] In a preferred embodiment of this utility model, the cross-section of the annular groove is rectangular, trapezoidal, or triangular.

[0015] In a preferred embodiment of the present invention, a rubber pad is further provided between the end face of the bearing and the bottom surface of the bearing mounting chamber.

[0016] In a preferred embodiment of the present invention, the surface of the elastic element has protrusions and / or ribs.

[0017] This utility model also proposes a vacuum cleaner, including a motor, said motor comprising:

[0018] The housing, the rotor assembly and stator assembly disposed within the housing, and the bearing bracket located at the end of the rotor assembly away from the housing;

[0019] A bearing mounting chamber is formed within the housing and / or the bearing bracket, and an annular groove is provided on the side wall of the bearing mounting chamber;

[0020] An elastic element, wherein the elastic element is installed within the annular groove;

[0021] The bearing is sleeved on the output shaft of the rotor assembly and located in the bearing mounting chamber, and the elastic element is located between the bearing mounting chamber and the bearing.

[0022] In a preferred embodiment of this utility model, the power tool is one of a vacuum cleaner, a hair dryer, a pruning machine, and a chainsaw.

[0023] This utility model proposes an electric motor and power tool. A groove is made in the inner wall of the bearing mounting chamber, and an elastic element is embedded therein. The elastic element is elastically contacted and fixed to the inner wall of the groove. The rotor bearing is installed in the bearing chamber, with the bottom of the bearing contacting a rubber pad. The outer ring of the bearing is elastically and tightly fitted with the elastic element. The bearing is fixed by friction, so that the vibration generated by the motor during operation can be buffered by the elastic element and the rubber pad, reducing the transmission of bearing vibration to the outside of the motor and effectively reducing motor noise. Simultaneously, since the bearing is not completely fixed during motor operation, it can be adjusted to the optimal position in the bearing mounting chamber, ensuring smooth motor operation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the motor structure in one embodiment of the present invention.

[0026] Figure 2 This is a cross-sectional structural diagram of the motor in one embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the motor housing in one embodiment of the present invention.

[0028] Figure 4 This is a cross-sectional schematic diagram of the motor housing in one embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the structure of a vacuum cleaner in one embodiment of the present invention.

[0030] Label Explanation:

[0031] 100. Motor; 20. Housing; 30. Bearing bracket; 311. Output shaft; 201. Bearing mounting chamber; 203. Elastic component; 204. Rubber pad; 200. Vacuum cleaner; 210. Housing; 220. Dust collection unit; 230. Suction generating unit; 240. Duct unit; 250. Floor brush. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0033] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Understandably, bearings in existing motors are basically glued to the bearing housing. In this way, the bearing is completely fixed. If the bearing is not concentric, it is easy to increase the noise of the bearing during operation. At the same time, the heat generated during operation can also cause the glue to fail, resulting in the bearing detaching and losing its fixation, which in turn leads to motor failure. In addition, this fixing method allows the vibration of the motor to be transmitted to the outside of the motor through the bearing housing, resulting in the problem of high motor noise.

[0035] Please see Figures 1 to 4 As shown, this utility model proposes a motor that changes the bearing fixing method to avoid motor failure due to bearing fixing failure, and can effectively reduce motor noise. Specifically, the motor 100 includes a housing 20, a rotor assembly and a stator assembly disposed in the housing 20, and a bearing bracket 30 located at the end of the rotor assembly away from the housing 20. Bearings are installed in the housing 20 and the bearing bracket 30, and the bearings are sleeved on the output shaft 311 of the rotor assembly.

[0036] Please see Figures 1 to 2 As shown, in this embodiment, a bearing mounting chamber 201 is formed within both the housing 20 and / or the bearing bracket 30. An annular groove 202 is formed on the side wall of the bearing mounting chamber, and an elastic element 203 is embedded within the annular groove 202. A bearing is installed within the bearing mounting chamber, and a rubber pad 204 is also arranged between the bearing and the bottom surface of the mounting chamber. The bearing is fixed by the compression action between itself and the elastic element 203. Furthermore, the elastic element 203 and the rubber pad 204 also provide a buffering effect, effectively reducing motor noise. In this embodiment, the elastic element 203 is a rubber ring or other elastic structure. It is understood that the installation and fixing methods of the bearing mounting chamber, the elastic element, and the second bearing in the bearing bracket are the same or similar. The following embodiment uses the bearing installation within the housing 20 as an example for explanation.

[0037] Please see Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, a bearing mounting chamber 201 is formed inside the housing 20. An annular groove 202 is provided on the side wall of the bearing mounting chamber 201. An elastic element 203 is fixedly installed in the annular groove 202. A first bearing 301 is sleeved on the output shaft 311 of the rotor assembly and located inside the bearing mounting chamber 201. The outer side wall of the first bearing 301 is pressed and fixed with the elastic element 203. That is, the first bearing 301 is elastically pressed with the elastic element 203, so that the outer ring of the bearing is elastically and tightly fitted with the elastic element 203. The bearing is fixed by friction, so that the vibration generated by the motor during operation can be buffered by the elastic element 203, which can reduce the transmission of bearing vibration to the outside of the motor and effectively reduce motor noise. At the same time, since the bearing is not completely fixed when the motor is running, it can be adjusted to the optimal position in the bearing mounting chamber, ensuring smooth motor operation.

[0038] Please see Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, at least two annular grooves 202 are provided on the side wall of the bearing mounting chamber 201. Each annular groove 202 is embedded with an elastic element 203 to increase the friction between the first bearing 301 and the elastic element 203 during installation, ensuring reliable installation. At the same time, the presence of multiple elastic elements 203 can further reduce bearing vibration transmission and effectively reduce motor noise.

[0039] Please see Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, along the axial direction of the elastic member 203, the thickness of the elastic member 203 is greater than the width of the annular groove 202. This ensures that after the elastic member 203 is embedded in the annular groove 202, the elastic member 203 can be securely installed within the annular groove 202 due to the compression action of its elastic deformation on the sidewall of the annular groove 202, preventing the elastic member 203 from falling off. In this embodiment, along the radial direction of the elastic member 203, the thickness of one side of the elastic member 203 is greater than the depth of the annular groove 202. This ensures that after the elastic member 203 is embedded in the annular groove 202, it at least partially protrudes from the annular groove 202, making compression contact with the first bearing 301 in the bearing mounting chamber 201. This ensures that it can fix the first bearing 301 and provide vibration damping. In this embodiment, the inner diameter of the elastic element 203 is smaller than the outer diameter of the first bearing 301 to ensure that the bearing can exert a squeezing effect on the elastic element 203 after installation, thus ensuring the reliability of its installation and the effectiveness of vibration reduction. In this embodiment, the cross-sectional shape of the elastic element 203 can be any one or more of a circle, rectangle, and ellipse, and the cross-sectional shape of the annular groove 202 can be any one or more of a rectangle, trapezoid, and triangle. Of course, the cross-sectional shapes of the elastic element 203 and the annular groove 202 can also be set to other shapes.

[0040] Please see Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the surface of the elastic member 203 may also be provided with one or more of the following: protrusions, ribs, or other surface protrusion structures, in order to increase the friction between the elastic member 203 and the first bearing 301, ensure the reliability of its installation, increase the buffering capacity of the elastic member 203, and further reduce motor noise.

[0041] Please see Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, a rubber pad 204 is also provided between the end face of the first bearing 301 and the bottom surface of the bearing mounting chamber 201. The rubber pad 204 can play a buffering role, further reducing the transmission of bearing vibration to the outside of the motor, so as to reduce motor noise.

[0042] Please see Figures 1 to 5As shown, the present invention also proposes an electric tool, which is one of a vacuum cleaner, a hair dryer, a pruning machine, and a chainsaw. Taking the vacuum cleaner 200 as an example: the vacuum cleaner 200 includes a housing 210, a dust collection unit 220 mounted on the housing 210, a suction generating unit 230, an air duct unit 240, and a floor brush 250. The housing 210 includes a body, a handle, and a base. The handle is located between the body and the base. The air duct unit 240 is used to cooperate with the air inlet and the floor brush 250. The suction generating unit 230 is connected to the side of the body away from the handle. The suction generating unit 230 includes a housing and a motor 100 disposed in the housing. The structure of the motor is the same as or similar to the structure of the motor described in the above embodiments, and will not be described again here to avoid repetition.

[0043] This utility model proposes a motor and power tool. A groove is made in the inner wall of the bearing mounting chamber, and an elastic element is embedded therein. The elastic element is elastically contacted and fixed to the inner wall of the groove. The rotor bearing is installed in the bearing mounting chamber, with the bottom of the bearing contacting a rubber pad. The outer ring of the bearing is elastically and tightly fitted with the elastic element. The bearing is fixed by friction, so that the vibration generated by the motor during operation can be buffered by the elastic element and the rubber pad, reducing the transmission of bearing vibration to the outside of the motor and effectively reducing motor noise. At the same time, since the bearing is not completely fixed during motor operation, it can be adjusted to the optimal position in the bearing mounting chamber, ensuring smooth motor operation.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0045] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0046] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0047] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0048] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0049] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0050] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0051] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0052] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. An electric motor, characterized in that, include: The housing, the rotor assembly and stator assembly disposed within the housing, and the bearing bracket located at the end of the rotor assembly away from the housing; A bearing mounting chamber is formed within the housing and / or the bearing bracket, and an annular groove is provided on the side wall of the bearing mounting chamber; An elastic element, wherein the elastic element is installed within the annular groove; The bearing is sleeved on the output shaft of the rotor assembly and located in the bearing mounting chamber, and the elastic element is located between the bearing mounting chamber and the bearing.

2. The motor according to claim 1, characterized in that, At least two annular grooves are provided on the side wall of the bearing mounting chamber.

3. The motor according to claim 1, characterized in that, The cross-section of the elastic element is circular, rectangular, or elliptical.

4. The motor according to claim 1, characterized in that, Along the axial direction of the elastic element, the thickness of the elastic element is greater than the width of the annular groove.

5. The motor according to claim 1, characterized in that, Along the radial direction of the elastic element, the thickness of one side of the elastic element is greater than the depth of the annular groove.

6. The motor according to claim 1, characterized in that, The inner diameter of the elastic element is smaller than the outer diameter of the bearing.

7. The motor according to claim 1, characterized in that, The cross-section of the annular groove is rectangular, trapezoidal, or triangular.

8. The motor according to claim 1, characterized in that, A rubber pad is also provided between the end face of the bearing and the bottom surface of the bearing mounting chamber.

9. The motor according to claim 1, characterized in that, The surface of the elastic element is provided with protrusions and / or ribs.

10. A power tool, characterized in that, Includes a motor, said motor comprising: The housing, the rotor assembly and stator assembly disposed within the housing, and the bearing bracket located at the end of the rotor assembly away from the housing; A bearing mounting chamber is formed within the housing and / or the bearing bracket, and an annular groove is provided on the side wall of the bearing mounting chamber; An elastic element, wherein the elastic element is installed within the annular groove; The bearing is sleeved on the output shaft of the rotor assembly and located in the bearing mounting chamber, and the elastic element is located between the bearing mounting chamber and the bearing.

11. The power tool according to claim 10, characterized in that, The power tool is one of the following: a vacuum cleaner, a hair dryer, a pruning machine, and a chainsaw.

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