EP2959818B1 - A vacuum cleaner having motor suspension immobile structure - Google Patents

A vacuum cleaner having motor suspension immobile structure Download PDF

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Publication number
EP2959818B1
EP2959818B1 EP14198918.6A EP14198918A EP2959818B1 EP 2959818 B1 EP2959818 B1 EP 2959818B1 EP 14198918 A EP14198918 A EP 14198918A EP 2959818 B1 EP2959818 B1 EP 2959818B1
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EP
European Patent Office
Prior art keywords
vacuum cleaner
motor
air duct
dust
flexible air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14198918.6A
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German (de)
French (fr)
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EP2959818A1 (en
Inventor
Zugen Ni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kingclean Electric Co Ltd
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Kingclean Electric Co Ltd
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Filing date
Publication date
Application filed by Kingclean Electric Co Ltd filed Critical Kingclean Electric Co Ltd
Publication of EP2959818A1 publication Critical patent/EP2959818A1/en
Application granted granted Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/24—Hoses or pipes; Hose or pipe couplings

Definitions

  • the present invention relates to the field of vacuum cleaners, specifically to a vacuum cleaner having a motor suspension mounting structure.
  • a vacuum cleaner currently sold on the market is generally provided with a dust box and a motor.
  • the motor rotates at a high speed to make the dust box produce a certain vacuum and negative pressure, and the air with dust is inhaled from a suction port of the vacuum cleaner and filtered after being inhaled into the dust box, the dust being filtered off and left inside the dust box, the remaining clean air entering the motor one by one through the dust-box air outlet and the motor suction port and being finally discharged through an exhaust port of the motor located downstream.
  • An example can be seen in WO 09/101775 .
  • the air duct used for connecting the dust-box air outlet to the motor suction port is a rigid pipe, which can be neither extensionally deformed in the axial direction nor torsionally deformed in the circumferential direction, and therefore the relative position between the motor and the dust box is completely fixed and cannot be changed.
  • the motor rotates at a high speed and produces vibration
  • the rigid pipe used for connecting the dust-box air outlet to the motor suction port will also vibrate because of vacuum suction and airflow, which make the dust box vibrate after the vibration is transferred to the dust box and then drive the entire vacuum cleaner to vibrate.
  • a purpose of the present invention is as follows: In order to solve the above problems, a vacuum cleaner having a motor suspension mounting structure is provided, capable of weakening resonance of the entire machine caused by high speed rotation of the motor and reducing the vibration noise caused by resonance of the entire machine.
  • a technical solution of the present invention is as follows: A vacuum cleaner having a motor suspension mounting structure, with a retractable flexible air duct being sealingly connected between its dust-box air outlet and motor suction port.
  • the flexible air duct is provided at its left end with a left flange sealingly clipped in the dust-box air outlet, and provided at its right end with a right flange sealingly clipped in the motor suction port.
  • the right flange is composed of a primary flange body and a secondary flange body that are spaced left and right, between which is an expanding safety clearance.
  • the flexible air duct is provided on the central duct wall with at least one annular fold.
  • the flexible air duct is made of a plastic material.
  • the flexible air duct is made of a rubber material.
  • the present invention has the following advantages:
  • the operating noise of the vacuum cleaner mainly comes from the following two aspects: On one hand, the motor in operation transfers its vibration to the vacuum cleaner housing, and a resonance phenomenon is produced in the transmission process, which then causes the motor housing to vibrate significantly, thus producing noise; on the other hand, the negative-pressure airflow in the air duct drives the air duct wall to vibrate at a high frequency, thus producing noise.
  • the air duct used for connecting the dust-box air outlet to the motor suction port is set to be a flexible air duct that can be both extensionally deformed and torsionally deformed, thus establishing "soft connection" between the motor and the dust box.
  • the vibration amplitude of the vacuum cleaner housing is extremely small or even zero, which then reduces the operating noise resulted from vibration of the vacuum cleaner housing itself; there will be no "numb" feeling of hand when a hand is in contact with the outer surface of the vacuum cleaner, thus improving operational comfort of the vacuum cleaner.
  • the air duct used in this vacuum cleaner for connecting the dust-box air outlet to the motor suction port is a flexible air duct having good deformation properties, rather than a rigid duct in a traditional structure; therefore, while the vacuum cleaner is in operation, the negative-pressure airflow produced in the air duct can only make this flexible air duct sucked to be deflated and deformed, rather than cause violent vibration of the flexible air duct, thereby eliminating the operating noise resulted from vibration of the air duct itself, meanwhile also preventing the air duct from being destructively deformed due to the negative-pressure airflow. It is thus clear that the present invention reduces not only the operating noise produced by vibration of the vacuum cleaner housing, but also the operating noise produced by vibration of the air duct.
  • Figs. 1-4 show a vacuum cleaner having a motor suspension mounting structure of the present invention, which comprises a motor 4 and a dust box 5, wherein the dust box 5 has a dust-box air outlet 1, the motor 4 has a motor suction port 2 that is composed of plastic parts, and the motor 4 is composed of a motor body and a motor casing for accommodating this motor body, with the motor suction port 2 being disposed on the motor casing.
  • a retractable flexible air duct 3 is sealingly connected between the dust-box air outlet 1 and the motor suction port 2.
  • the dust-box air outlet 1 sealingly communicates with the motor suction port 2 through the flexible air duct 3, which can be both extensionally deformed in the axial direction and torsionally deformed in the circumferential direction.
  • the flexible air duct 3 can be made of either a plastic material or a rubber material, and can certainly also be made of other flexible materials having good deformation properties.
  • the flexible air duct 3 may be deformed in the axial and circumferential directions, and the motor suction port 2 may be displaced and rotate within a certain range with respect to the dust-box air outlet 1, i.e., the motor 4 can be displaced and rotate within a certain range with respect to the dust box 5.
  • the air duct used in this vacuum cleaner for connecting the dust-box air outlet to the motor suction port is a flexible air duct having good deformation properties, rather than a rigid duct in a traditional structure; thus, while the vacuum cleaner is in operation, the negative-pressure airflow produced in the air duct can only make this flexible air duct sucked to be deflated and deformed, rather than cause violent vibration of the flexible air duct, thereby eliminating the operating noise resulted from vibration of the air duct itself, meanwhile also preventing the air duct from being destructively deformed due to the negative-pressure airflow. It is thus clear that the present invention reduces not only the operating noise produced by vibration of the vacuum cleaner housing, but also the operating noise produced by vibration of the air duct.
  • the flexible air duct 3 in this example is provided at the left end with a left flange 31 radially turned outward, and provided at the right end with a right flange 32 radially turned outward, wherein the left flange 31 is sealingly clipped inside the dust-box air outlet 1, while the right flange 32 is sealingly clipped inside the motor suction port 2.
  • the right flange 32 is composed of a primary flange body 32a and a secondary flange body 32b that are spaced left and right, between which is an expanding safety clearance B.
  • This structure has the following advantages: After assembly, the primary flange body 32a and the secondary flange body 32b are deformed due to being close to each other under the action of a clamping force of the plastic part at the motor suction port, thus making the primary flange body 32a and the secondary flange body 32b have a tendency of getting away from each other; if the plastic part of which the motor suction port 2 is composed is deformed, the primary flange body 32a and the secondary flange body 32b will then make a relative movement that makes them far away from each other or close to each other (in this process, the safety clearance B may become greater or less), and then axial dimension compensation is provided, thus keeping the right flange 32 in sealed connection to the motor suction port 2.
  • the flexible air duct 3 in this example is provided on the central duct wall with at least one annular fold 33, and certainly there may be also two or more annular folds 33.
  • This annular fold 33 has a convex outer surface and a concave inner surface, as well as an approximately arc-shaped cross section, as shown in Fig. 2 .
  • the annular fold 33 makes the flexible air duct 3 have a great amount of deformation in the axial and circumferential directions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Description

    FIELD OF THE INVENTION
  • The present invention relates to the field of vacuum cleaners, specifically to a vacuum cleaner having a motor suspension mounting structure.
    • BACKGROUND OF THE INVENTION
  • A vacuum cleaner currently sold on the market, especially a horizontal vacuum cleaner, is generally provided with a dust box and a motor. In operation, the motor rotates at a high speed to make the dust box produce a certain vacuum and negative pressure, and the air with dust is inhaled from a suction port of the vacuum cleaner and filtered after being inhaled into the dust box, the dust being filtered off and left inside the dust box, the remaining clean air entering the motor one by one through the dust-box air outlet and the motor suction port and being finally discharged through an exhaust port of the motor located downstream. An example can be seen in WO 09/101775 . In a prior art vacuum cleaner, the air duct used for connecting the dust-box air outlet to the motor suction port is a rigid pipe, which can be neither extensionally deformed in the axial direction nor torsionally deformed in the circumferential direction, and therefore the relative position between the motor and the dust box is completely fixed and cannot be changed. As a result, there will be the following problems:
    When the vacuum cleaner is in operation, the motor rotates at a high speed and produces vibration, and the rigid pipe used for connecting the dust-box air outlet to the motor suction port will also vibrate because of vacuum suction and airflow, which make the dust box vibrate after the vibration is transferred to the dust box and then drive the entire vacuum cleaner to vibrate. Besides, in the process of vibration transmission, the amount of vibration transferred to the dust box becomes greater because of resonance, which makes the entire vacuum cleaner noisy; when a user contacts the outer surface of the vacuum cleaner by hand, there is also a "numb" feeling of hand, weakening the user experience. However, there is no innovative solution for reducing vibration of the conventional vacuum cleaner, with the effect not greatly improved.
    • CONTENTS OF THE INVENTION
  • A purpose of the present invention is as follows: In order to solve the above problems, a vacuum cleaner having a motor suspension mounting structure is provided, capable of weakening resonance of the entire machine caused by high speed rotation of the motor and reducing the vibration noise caused by resonance of the entire machine.
  • A technical solution of the present invention is as follows: A vacuum cleaner having a motor suspension mounting structure, with a retractable flexible air duct being sealingly connected between its dust-box air outlet and motor suction port.
  • Preferably, the flexible air duct is provided at its left end with a left flange sealingly clipped in the dust-box air outlet, and provided at its right end with a right flange sealingly clipped in the motor suction port.
  • Preferably, the right flange is composed of a primary flange body and a secondary flange body that are spaced left and right, between which is an expanding safety clearance.
  • Preferably, the flexible air duct is provided on the central duct wall with at least one annular fold.
  • Preferably, there is totally one annular fold.
  • Preferably, the flexible air duct is made of a plastic material.
  • Preferably, the flexible air duct is made of a rubber material.
  • The present invention has the following advantages:
    The operating noise of the vacuum cleaner mainly comes from the following two aspects:
    On one hand, the motor in operation transfers its vibration to the vacuum cleaner housing, and a resonance phenomenon is produced in the transmission process, which then causes the motor housing to vibrate significantly, thus producing noise; on the other hand, the negative-pressure airflow in the air duct drives the air duct wall to vibrate at a high frequency, thus producing noise.
  • In this vacuum cleaner of the present invention, the air duct used for connecting the dust-box air outlet to the motor suction port is set to be a flexible air duct that can be both extensionally deformed and torsionally deformed, thus establishing "soft connection" between the motor and the dust box. On one hand, it blocks the path of transmission of the motor vibration from the motor suction port to the dust box and the vacuum cleaner housing, and reduces the influence of the motor vibration on the dust box, which disenables the motor vibration to be transferred to the vacuum cleaner housing through the dust box while the vacuum cleaner is in operation, and makes the resonance phenomenon between the dust box and the motor disappear; therefore, the vibration amplitude of the vacuum cleaner housing is extremely small or even zero, which then reduces the operating noise resulted from vibration of the vacuum cleaner housing itself; there will be no "numb" feeling of hand when a hand is in contact with the outer surface of the vacuum cleaner, thus improving operational comfort of the vacuum cleaner. On the other hand, the air duct used in this vacuum cleaner for connecting the dust-box air outlet to the motor suction port is a flexible air duct having good deformation properties, rather than a rigid duct in a traditional structure; therefore, while the vacuum cleaner is in operation, the negative-pressure airflow produced in the air duct can only make this flexible air duct sucked to be deflated and deformed, rather than cause violent vibration of the flexible air duct, thereby eliminating the operating noise resulted from vibration of the air duct itself, meanwhile also preventing the air duct from being destructively deformed due to the negative-pressure airflow. It is thus clear that the present invention reduces not only the operating noise produced by vibration of the vacuum cleaner housing, but also the operating noise produced by vibration of the air duct.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention will be further described below with reference to drawings and examples.
    • Fig. 1 is a partial sectional view of the vacuum cleaner in the examples of the present invention;
    • Fig. 2 is an enlarged view of the portion A in Fig. 1;
    • Fig. 3 is a stereoscopic structural view of the flexible air duct in the examples of the present invention; and
    • Fig. 4 is a side view of the flexible air duct in the examples of the present invention.
  • Wherein: 1. dust-box air outlet; 2. motor suction port; 3. flexible air duct; 31. left flange; 32. right flange; 32a. primary flange body; 32b. secondary flange body; 33. annular fold; 4. motor; and 5. dust box.
    • DETAILED DESCRIPTION OF THE EMBODIMENTS
  • Figs. 1-4 show a vacuum cleaner having a motor suspension mounting structure of the present invention, which comprises a motor 4 and a dust box 5, wherein the dust box 5 has a dust-box air outlet 1, the motor 4 has a motor suction port 2 that is composed of plastic parts, and the motor 4 is composed of a motor body and a motor casing for accommodating this motor body, with the motor suction port 2 being disposed on the motor casing.
  • The key improvement is that a retractable flexible air duct 3 is sealingly connected between the dust-box air outlet 1 and the motor suction port 2. The dust-box air outlet 1 sealingly communicates with the motor suction port 2 through the flexible air duct 3, which can be both extensionally deformed in the axial direction and torsionally deformed in the circumferential direction.
  • The flexible air duct 3 can be made of either a plastic material or a rubber material, and can certainly also be made of other flexible materials having good deformation properties.
  • When the vacuum cleaner is in operation to make the motor 4 itself and the motor suction port 2 on the motor 4 vibrate, the flexible air duct 3 may be deformed in the axial and circumferential directions, and the motor suction port 2 may be displaced and rotate within a certain range with respect to the dust-box air outlet 1, i.e., the motor 4 can be displaced and rotate within a certain range with respect to the dust box 5. Therefore, the influence of vibration of the motor 4 on the dust box 5 is reduced effectively, the vibration amplitude of the dust box 5 and the entire vacuum cleaner is made to be extremely small or even zero, and thus the vibration noise of the vacuum cleaner in operation is reduced; there will be no "numb" feeling of hand when a hand is in contact with the outer surface of the vacuum cleaner, enhancing the user experience. Besides, the air duct used in this vacuum cleaner for connecting the dust-box air outlet to the motor suction port is a flexible air duct having good deformation properties, rather than a rigid duct in a traditional structure; thus, while the vacuum cleaner is in operation, the negative-pressure airflow produced in the air duct can only make this flexible air duct sucked to be deflated and deformed, rather than cause violent vibration of the flexible air duct, thereby eliminating the operating noise resulted from vibration of the air duct itself, meanwhile also preventing the air duct from being destructively deformed due to the negative-pressure airflow. It is thus clear that the present invention reduces not only the operating noise produced by vibration of the vacuum cleaner housing, but also the operating noise produced by vibration of the air duct.
  • As shown in Figs. 3-4, in order to facilitate the sealed connection between the flexible air duct 3 and the dust-box air outlet 1 and motor suction port 2, the flexible air duct 3 in this example is provided at the left end with a left flange 31 radially turned outward, and provided at the right end with a right flange 32 radially turned outward, wherein the left flange 31 is sealingly clipped inside the dust-box air outlet 1, while the right flange 32 is sealingly clipped inside the motor suction port 2. The right flange 32 is composed of a primary flange body 32a and a secondary flange body 32b that are spaced left and right, between which is an expanding safety clearance B. This structure has the following advantages: After assembly, the primary flange body 32a and the secondary flange body 32b are deformed due to being close to each other under the action of a clamping force of the plastic part at the motor suction port, thus making the primary flange body 32a and the secondary flange body 32b have a tendency of getting away from each other; if the plastic part of which the motor suction port 2 is composed is deformed, the primary flange body 32a and the secondary flange body 32b will then make a relative movement that makes them far away from each other or close to each other (in this process, the safety clearance B may become greater or less), and then axial dimension compensation is provided, thus keeping the right flange 32 in sealed connection to the motor suction port 2.
  • Again as shown in Figs. 3-4, in order to make the flexible air duct 3 have a sufficient amount of deformation in the axial and circumferential directions, the flexible air duct 3 in this example is provided on the central duct wall with at least one annular fold 33, and certainly there may be also two or more annular folds 33. This annular fold 33 has a convex outer surface and a concave inner surface, as well as an approximately arc-shaped cross section, as shown in Fig. 2. The annular fold 33 makes the flexible air duct 3 have a great amount of deformation in the axial and circumferential directions.
  • Certainly, the above examples are used only for explaining the technical concept and characteristics of the present invention.

Claims (6)

  1. A vacuum cleaner having a motor suspension mounting structure, a retractable flexible air duct (3) is sealingly connected between its dust-box air outlet (1) and motor suction port (2), wherein the flexible air duct (3) is provided at its right end with a right flange (32), characterized in that the right flange (32) is composed of a primary flange body (32a) and a secondary flange body (32b) that are spaced left and right, between which is an expanding safety clearance (B).
  2. The vacuum cleaner having a motor suspension mounting structure according to claim 1, characterized in that: the flexible air duct (3) is provided at its left end with a left flange (31) sealingly clipped in the dust-box air outlet (1), and the right end with the right flange (32) is sealingly clipped in the motor suction port (2).
  3. The vacuum cleaner having a motor suspension mounting structure according to claim 1 or 2, characterized in that: the flexible air duct (3) is provided on the central duct wall with at least one annular fold (33).
  4. The vacuum cleaner having a motor suspension mounting structure according to claim 1 or 2, characterized in that: there is totally one annular fold (33).
  5. The vacuum cleaner having a motor suspension mounting structure according to any of claims 1-4, characterized in that: the flexible air duct (3) is made of a plastic material.
  6. The vacuum cleaner having a motor suspension mounting structure according to any of claims 1-4, characterized in that: the flexible air duct (3) is made of a rubber material.
EP14198918.6A 2014-06-27 2014-12-18 A vacuum cleaner having motor suspension immobile structure Active EP2959818B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410300136.4A CN104083127A (en) 2014-06-27 2014-06-27 Dust collector with motor suspension fixing structure

Publications (2)

Publication Number Publication Date
EP2959818A1 EP2959818A1 (en) 2015-12-30
EP2959818B1 true EP2959818B1 (en) 2018-06-27

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EP14198918.6A Active EP2959818B1 (en) 2014-06-27 2014-12-18 A vacuum cleaner having motor suspension immobile structure

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EP (1) EP2959818B1 (en)
CN (1) CN104083127A (en)

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
GB2563695B (en) 2017-06-19 2020-03-11 Tti Macao Commercial Offshore Ltd A surface cleaning apparatus
CN111358344B (en) * 2019-11-29 2021-06-25 添可智能科技有限公司 Recycling bin, filtering assembly and cleaning device
CN115444305B (en) * 2022-09-15 2023-10-13 苏州市春菊电器有限公司 Dust collector assembly for improving noise reduction effect of dust collector

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JP3864660B2 (en) * 2000-01-28 2007-01-10 松下電器産業株式会社 Electric vacuum cleaner
KR100713285B1 (en) * 2005-05-17 2007-05-04 엘지전자 주식회사 Vacuum cleaner
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Publication number Publication date
EP2959818A1 (en) 2015-12-30
CN104083127A (en) 2014-10-08

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