Vacuum cleaner, motor assembly and housing structure thereof

Abstract

The present invention relates to a vacuum cleaner, a motor assembly and a shell structure thereof. The motor assembly includes a motor and a shell structure, and the shell structure includes a first shell and a second shell. The motor is arranged in a housing cavity of the first shell. Since the noise reduction cavity is arranged on the inner wall of the first shell and penetrates the outer wall of the first shell, the processing process of the noise reduction cavity is convenient, the processing difficulty is reduced, and the processing efficiency is improved. The second shell is sleeved on the first shell, thereby effectively covering the noise reduction cavity, forming a noise reduction cavity with one end closed and the other end open. The motor generates noise during use, and the sound waves of the noise are transmitted to the noise reduction cavity, and the noise is eliminated by the noise reduction cavity, thereby realizing the noise reduction effect of the motor assembly. At the same time, the noise reduction cavity avoids the need to set a thick sound-absorbing material, thereby avoiding the increase in the size of the shell structure, making the structure of the motor assembly compact, which is conducive to reducing the size of the vacuum cleaner.

Description

Technical Field

[0001] The present invention relates to the technical field of noise reduction structures, and in particular to a vacuum cleaner, a motor assembly and a shell structure thereof. Background Art

[0002] Traditional vacuum cleaners use motors to drive blades to rotate at high speed, generating negative air pressure in a sealed housing to form a suction source, thereby sucking in dust. However, as motor power and speed increase, the noise generated by the motor also increases, affecting the user experience. Summary of the invention

[0003] Based on this, it is necessary to provide a vacuum cleaner, a motor assembly and a housing structure thereof that can achieve the motor noise reduction effect in order to address the above problems.

[0004] A housing structure of a motor assembly, comprising:

[0005] A first housing is formed with an accommodating cavity for accommodating the motor, a plurality of noise reduction cavities are provided at intervals on the inner wall of the first housing, and the noise reduction cavities penetrate the outer wall of the first housing; and

[0006] The second shell is sleeved on the first shell, and the second shell covers the noise reduction cavity.

[0007] When the shell structure of the motor assembly is in use, the motor is disposed in the accommodating cavity of the first shell. Since the noise reduction cavity is provided on the inner wall of the first shell and penetrates the outer wall of the first shell, the processing process of the noise reduction cavity is convenient, the processing difficulty is reduced, and the processing efficiency is improved. The second shell is further sleeved on the first shell, thereby effectively covering the noise reduction cavity, forming a noise reduction cavity with one end closed and one end open. The motor generates noise during use, and the sound waves of the noise are transmitted to the noise reduction cavity, and the noise is eliminated by the noise reduction cavity, thereby achieving the noise reduction effect of the motor assembly. At the same time, the noise reduction cavity avoids the need to set a thick sound-absorbing material, thereby avoiding the increase in the size of the shell structure, making the structure of the motor assembly compact, which is conducive to reducing the size of the vacuum cleaner.

[0008] In one embodiment, the noise reduction cavity includes a resonance cavity and a transmission hole, the transmission hole is opened on the inner wall of the first shell, the resonance cavity is opened on the outer wall of the first shell, the resonance cavity is connected to the transmission hole, and the second shell covers the resonance cavity.

[0009] In one embodiment, the first shell includes a shell body and at least two noise reduction parts, at least two of the noise reduction parts are arranged on the shell body in parallel along the circumference of the shell body, the transmission hole is opened on the shell body, and a single noise reduction part is provided with a plurality of resonance cavities arranged at intervals, and the axial direction of the resonance cavity on the single noise reduction part is consistent.

[0010] In one embodiment, the resonant cavity is a Helmholtz resonant cavity.

[0011] In one embodiment, the resonance cavity is one or more of a circular cavity, a diamond cavity, a square cavity, a polygonal cavity, and an irregularly shaped cavity.

[0012] In one embodiment, the shell structure of the motor assembly further includes a silencer, which is disposed in the accommodating cavity and located on one end of the first shell, and the noise reduction cavity is opened on the side wall of the first shell.

[0013] In one of the embodiments, the muffler is provided with a plurality of spaced-apart muffler cavities, and the muffler cavities are communicated with the accommodating cavity.

[0014] In one of the embodiments, a single silencing cavity is formed as a 1 / 4 wavelength silencing tube.

[0015] In one embodiment, the first shell is opened toward one end of the muffler to form a mounting opening, the mounting opening is communicated with the accommodating cavity, and the second shell is sleeved on the first shell from one side of the mounting opening.

[0016] In one embodiment, the shell structure of the motor assembly also includes a seal, the first shell is provided with an air intake port connected to the accommodating cavity, the second shell is provided with an air exhaust port connected to the accommodating cavity, and the seal is used to be arranged between the first shell and the motor and at the air intake port.

[0017] In one of the embodiments, the air inlet is opened on one end of the first shell where the silencer is provided, and the sealing member is used to be provided between the silencer and the motor.

[0018] In one of the embodiments, the shell structure of the motor assembly further includes a shock absorbing member, the shock absorbing member is disposed in the accommodating cavity, and the shock absorbing member is used to be sleeved on the motor.

[0019] A motor assembly, comprising:

[0020] Motors; and

[0021] In the housing structure as described above, the motor is installed in the accommodating cavity.

[0022] A vacuum cleaner comprises the motor assembly as described above.

[0023] When the vacuum cleaner is in use, the motor is arranged in the accommodating cavity of the first shell. Since the noise reduction cavity is provided on the inner wall of the first shell and penetrates the outer wall of the first shell, the processing process of the noise reduction cavity is convenient, the processing difficulty is reduced, and the processing efficiency is improved. The second shell is further sleeved on the first shell, thereby effectively covering the noise reduction cavity, forming a noise reduction cavity with one end closed and the other end open. The motor generates noise during use, and the sound waves of the noise are transmitted to the noise reduction cavity, and the noise is eliminated by the noise reduction cavity, thereby achieving the noise reduction effect of the motor assembly. At the same time, the noise reduction cavity avoids the need to set thick sound-absorbing materials, thereby avoiding the increase in the size of the outer shell structure, making the structure of the motor assembly compact, which is conducive to reducing the size of the vacuum cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of a motor assembly in one embodiment;

[0025] Figure 2 for Figure 1 An exploded cross-sectional view of the motor assembly shown;

[0026] Figure 3 for Figure 1 An exploded schematic diagram of the motor assembly shown;

[0027] Figure 4 for Figure 3 A schematic structural diagram of the first shell;

[0028] Figure 5 for Figure 4 A front view of the first shell is shown.

[0029] Description of reference numerals:

[0030] 10. Motor assembly, 100. Motor, 200. Shell structure, 210. First shell, 211. Accommodating cavity, 212. Noise reduction cavity, 2121. Resonance cavity, 2122. Transmission hole, 213. Mounting port, 214. Card table, 215. Air intake port, 216. Shell body, 220. Second shell, 221. Exhaust port, 230. Sealing member, 240. Shock absorber, 250. Silencer, 252. Silencer cavity. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The various technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] See also Figure 1 The vacuum cleaner in one embodiment can effectively reduce the noise of the vacuum cleaner during use. Specifically, the vacuum cleaner includes a motor assembly 10, and the motor assembly 10 includes a motor 100 and a housing structure 200. The housing structure 200 includes a first shell 210 and a second shell 220. The first shell 210 is formed with a housing chamber 211 for mounting the motor 100, and the motor 100 is disposed in the housing chamber 211.

[0035] In this embodiment, the motor 100 is a vacuum motor, which can be effectively used as a suction source of the vacuum cleaner to achieve the function of vacuuming. Specifically, the motor 100 is a brushless DC vacuum motor.

[0036] Please also read Figure 2 and Figure 3 The inner wall of the first shell 210 is provided with a plurality of noise reduction chambers 212 arranged at intervals, and the noise reduction chambers 212 penetrate the outer wall of the first shell 210. The second shell 220 is sleeved on the first shell 210, and the second shell 220 covers the noise reduction chambers 212.

[0037] When in use, the motor 100 is arranged in the accommodating chamber 211 of the first shell 210. Since the noise reduction chamber 212 is provided on the inner wall of the first shell 210 and penetrates the outer wall of the first shell 210, the processing process of the noise reduction chamber 212 is convenient, the processing difficulty is reduced, and the processing efficiency is improved. Further, the second shell 220 is sleeved on the first shell 210, thereby effectively covering the noise reduction chamber 212, forming a noise reduction chamber 212 with one end closed and one end open. When the motor 100 generates noise during use, the sound waves of the noise are transmitted to the noise reduction chamber 212, and the noise is eliminated by the noise reduction chamber 212, thereby achieving the noise reduction effect of the motor assembly 10. At the same time, the noise reduction chamber 212 avoids the setting of thick sound-absorbing materials, thereby avoiding the increase in the size of the outer shell structure 200, making the structure of the motor assembly 10 compact, which is conducive to reducing the size of the vacuum cleaner.

[0038] In one embodiment, one end of the first housing 210 is opened to form a mounting opening 213, the mounting opening 213 is connected to the accommodating cavity 211, and the second housing 220 is sleeved on the first housing 210 from one side of the mounting opening 213. By providing the mounting opening 213 on the first housing 210, it is convenient for the motor 100 to be arranged in the accommodating cavity 211 from one side of the mounting opening 213 of the first housing 210, thereby improving the convenience of installing the motor 100. Further, by sleeved on the first housing 210 from one side of the mounting opening 213, the second housing 220 can confine the motor 100 in the accommodating cavity 211.

[0039] Optionally, a clamping platform 214 is further formed on the first shell 210, and the clamping platform 214 is arranged on the side wall of the first shell 210 away from the installation opening 213. The second shell 220 is sleeved on the first shell 210 and can abut against the clamping platform 214. By providing the clamping platform 214, the position of the second shell 220 on the first shell 210 can be effectively limited, thereby improving the stability of the installation of the first shell 210 and the second shell 220.

[0040] In this embodiment, the second housing 220 is welded to the first housing 210. Specifically, the second housing 220 is welded to the clamping platform 214. In other embodiments, the second housing 220 can also be fixed to the first housing 210 by connecting screws, buckle structures, and other connecting methods.

[0041] In one embodiment, the first housing 210 is provided with an air inlet 215 communicating with the accommodating chamber 211, and the second housing 220 is provided with an air outlet 221 communicating with the accommodating chamber 211. When in use, the motor 100 can inhale gas through the air inlet 215 of the first housing 210 and discharge gas through the air outlet 221 on the first housing 210, thereby completing the suction action and achieving the dust collection function of the vacuum cleaner.

[0042] Furthermore, the air inlet 215 is provided on one end of the first shell 210 facing away from the mounting port 213, and the air outlet 221 is provided on one end of the second shell 220 facing the air inlet 215, so that the air inlet 215 effectively forms a gas flow channel through the accommodating cavity 211 and the air outlet 221. Of course, in other embodiments, the air inlet 215 can also be provided on the side wall of the first shell 210; the air outlet 221 can also be provided on the side wall of the second shell 220.

[0043] Optionally, the housing structure 200 further includes a seal 230, which is used to be disposed between the first housing 210 and the motor 100 and disposed at the air inlet 215. The seal 230 can effectively ensure the stability of the motor 100's air intake through the air inlet 215, and prevent the gas from leaking from the gap between the motor 100 and the first housing 210 during the air intake process.

[0044] Optionally, the housing structure 200 further includes a shock absorber 240, which is disposed in the accommodating cavity 211 and is used to be sleeved on the motor 100. The shock absorber 240 can effectively improve the stability of the motor 100 in the accommodating cavity 211 and reduce the noise generated by the motor 100.

[0045] Specifically, the side of the shock absorber 240 facing away from the motor 100 can abut against the inner wall of the accommodating cavity 211, which can further improve the stability of the motor 100 in the accommodating cavity 211, prevent the motor 100 from moving relative to the first shell 210, effectively reduce vibration, and thus reduce noise generation.

[0046] See also Figure 4 and Figure 5 In one embodiment, the noise reduction chamber 212 includes a resonance chamber 2121 and a transmission hole 2122. The transmission hole 2122 is provided on the inner wall of the first shell 210, and the resonance chamber 2121 is provided on the outer wall of the first shell 210. The resonance chamber 2121 is connected to the transmission hole 2122, and the second shell 220 covers the resonance chamber 2121. The transmission hole 2122 facilitates the transmission of noise into the resonance chamber 2121, so that the noise resonates in the resonance chamber 2121, thereby achieving the purpose of noise reduction.

[0047] In this embodiment, the resonance cavity 2121 is a Helmholtz resonance cavity. The sound waves of the noise are transmitted to the Helmholtz resonance cavity through the transmission hole 2122, and the Helmholtz resonance cavity generates resonance to eliminate the noise. At the same time, the resonance effect of the Helmholtz resonance cavity is related to the volume, and thus, the resonance effect can be achieved by increasing the diameter of the resonance cavity 2121 and reducing the size of the resonance cavity 2121 along the axial direction while ensuring the volume of the resonance cavity 2121, thereby avoiding the increase of the thickness of the first shell 210, effectively reducing the size of the first shell 210, and facilitating the compact design of the motor assembly 10.

[0048] Optionally, the volumes of the multiple resonance cavities 2121 may be the same, or may be different. The volumes may be set according to the frequency of the noise generated by the motor 100. If the frequency of the noise generated by the motor 100 is relatively concentrated, the volumes of the multiple resonance cavities 2121 may be set to be the same; if the frequency of the noise generated by the motor 100 is not concentrated, the volumes of the resonance cavities 2121 may be set to be different to cope with noises of different frequencies.

[0049] Of course, in other embodiments, the noise reduction cavity 212 may also be a structure such as a 1 / 4 wavelength tube, as long as the noise reduction effect can be achieved.

[0050] Optionally, the resonance cavity 2121 is one or more of a circular cavity, a diamond cavity, a square cavity, a polygonal cavity, and an irregular cavity. The shape of the resonance cavity 2121 can be designed according to the specific structure of the first housing 210 .

[0051] In this embodiment, the resonance cavity 2121 includes a circular cavity and a diamond cavity, wherein the circular cavity array is arranged, and a diamond cavity is formed between every four circular cavities, thereby being able to reasonably utilize the space on the side wall of the first shell 210 to form as many resonance cavities 2121 as possible, thereby achieving a better purpose of noise reduction. Specifically, the volumes of the circular cavity and the diamond cavity are different, and noise reduction can be performed for noises of different frequencies.

[0052] In one embodiment, the first shell 210 includes a shell body 216 and at least two noise reduction parts 217, at least two noise reduction parts 217 are arranged on the shell body 216 in parallel along the circumference of the shell body 216, the transmission hole 2122 is opened on the shell body 216, a single noise reduction part 217 is opened with a plurality of resonance cavities 2121 arranged at intervals, and the axis direction of the resonance cavities 2121 on the single noise reduction part 217 is consistent. Since at least two noise reduction parts 217 are arranged on the shell body 216, and the axis direction of the resonance cavities 2121 on the single noise reduction part 217 is consistent, the resonance cavities 2121 on the single noise reduction part 217 can be processed in the same direction during processing, which effectively improves the processing efficiency.

[0053] Specifically, there are four noise reduction parts 217, which are arranged in parallel on the shell body 216, thereby avoiding too large a difference in the volume of the resonance cavity 2121 of each noise reduction part 217. Of course, in other embodiments, the number of noise reduction parts 217 can also be three, five, or other numbers.

[0054] In this embodiment, the noise reduction portion 217 is integrally formed on the shell body 216, which can effectively improve the structural stability of the noise reduction cavity 212. In other embodiments, the noise reduction portion 217 can also be provided on the shell body 216 by welding.

[0055] See also Figure 1 and Figure 2 In one embodiment, the shell structure 200 further includes a muffler 250, which is disposed in the accommodating cavity 211 and located on one end of the first shell 210, and the noise reduction cavity 212 is opened on the side wall of the first shell 210. The first shell 210 is opened toward one end of the muffler 250 to form a mounting opening 213. The noise reduction effect of the motor 100 can be further improved by providing the muffler 250. Since the motor 100 is installed in the accommodating cavity 211 through the mounting opening 213, and the muffler 250 is provided at one end facing the mounting opening 213, the space on the first shell 210 can be reasonably utilized.

[0056] Specifically, the muffler 250 is provided with a plurality of spaced muffler cavities 252, which are connected to the accommodating cavity 211. The noise generated by the motor 100 can be transferred from the accommodating cavity 211 to the muffler cavity 252, and the muffler cavity 252 is used to achieve the purpose of muffler.

[0057] In this embodiment, a single silencer cavity 252 is formed as a 1 / 4 wavelength silencer. The sound waves of the noise enter the 1 / 4 wavelength silencer and are reflected back to the accommodating cavity 211 in the 1 / 4 wavelength silencer. Since the reflected sound waves are in opposite phases to the noise sound waves in the accommodating cavity 211, they can cancel each other out, thereby achieving the purpose of noise reduction and silencing. At the same time, the 1 / 4 wavelength silencer has a simple structure and is easy to process. It makes reasonable use of the space between the motor 100 and one end of the first shell 210, avoiding increasing the size of the first shell 210. In other embodiments, the silencer cavity 252 can also be a Helmholtz resonance cavity, as long as the silencing effect can be achieved.

[0058] Specifically, the air inlet 215 is provided at one end of the first housing 210 where the muffler 250 is provided, and the seal 230 is used to be provided between the muffler 250 and the motor 100. The muffler 250 is provided by rationally utilizing the space in the first housing 210, and the noise reduction and silencing effect of the housing structure 200 on the motor 100 is effectively improved.

[0059] The motor assembly 10 in the above vacuum cleaner can effectively reduce the noise generated by the motor 100 during operation, while avoiding increasing the structural size, which is conducive to the compactness and miniaturization of the vacuum cleaner structure. The above motor assembly 10 has a simple structure and is less difficult to produce, which is conducive to improving the processing accuracy; at the same time, the installation process is convenient, which can effectively improve the manufacturing and installation efficiency of the motor assembly 10, and thus can effectively improve the manufacturing and installation efficiency of the vacuum cleaner.

[0060] The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A housing structure of a motor assembly, characterized in that: include: A first housing is formed with an accommodating cavity for accommodating the motor, and a plurality of noise reduction cavities are arranged at intervals on the inner wall of the first housing, and the noise reduction cavities penetrate the outer wall of the first housing; and A second shell is sleeved on the first shell, and the second shell covers the noise reduction cavity; The noise reduction cavity includes a resonance cavity and a transmission hole, the first shell includes a shell body and at least two noise reduction parts, at least two of the noise reduction parts are arranged in parallel on the shell body along the circumference of the shell body, a single noise reduction part is provided with a plurality of resonance cavities arranged at intervals, a plurality of the resonance cavities are arranged in a plurality of rows along the circumference of the shell body, the axial directions of the resonance cavities on a single noise reduction part are consistent, the volumes of the resonance cavities on a single noise reduction part are different, the transmission hole is opened on the shell body, the resonance cavity is connected to the transmission hole, and the second shell covers the resonance cavity.

2. The housing structure of the motor assembly according to claim 1, characterized in that: The resonant cavity is a Helmholtz resonant cavity.

3. The housing structure of the motor assembly according to claim 1, characterized in that: The resonance cavity is one or more of a circular cavity, a diamond cavity, a square cavity, a polygonal cavity, and an irregularly shaped cavity.

4. The housing structure of the motor assembly according to any one of claims 1 to 3, characterized in that: It also includes a silencer, which is arranged in the accommodating cavity and located on one end of the first shell. The noise reduction cavity is opened on the side wall of the first shell.

5. The housing structure of the motor assembly according to claim 4, characterized in that: The muffler is provided with a plurality of muffler cavities arranged at intervals, and the muffler cavities are communicated with the accommodating cavity.

6. The housing structure of the motor assembly according to claim 5, characterized in that: The single silencing cavity is formed as a 1 / 4 wavelength silencing tube.

7. The housing structure of the motor assembly according to claim 4, characterized in that: The first shell is opened toward one end of the muffler to form a mounting opening, the mounting opening is communicated with the accommodating cavity, and the second shell is sleeved on the first shell from one side of the mounting opening.

8. The housing structure of the motor assembly according to claim 7, characterized in that: It also includes a sealing member. The first shell is provided with an air intake port connected to the accommodating chamber. The second shell is provided with an air exhaust port connected to the accommodating chamber. The sealing member is used to be arranged between the first shell and the motor and at the air intake port.

9. The housing structure of the motor assembly according to claim 8, characterized in that: The air inlet is opened on one end of the first shell where the silencer is provided, and the sealing member is used to be provided between the silencer and the motor.

10. The housing structure of the motor assembly according to any one of claims 1 to 3, characterized in that: It also includes a shock absorbing component, which is arranged in the accommodating cavity and is used to be sleeved on the motor.

11. A motor assembly, characterized in that: include: Motor; and According to the housing structure as described in any one of claims 1 to 10, the motor is installed in the accommodating cavity.

12. A vacuum cleaner, characterized in that: Comprising the motor assembly of claim 11.

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