JP2014171808A - Rotary cleaning body, suction port body, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a rotary cleaning body, suction port body, and vacuum cleaner for keeping smooth rotation by preventing the increase of a rotation load.SOLUTION: A rotary cleaning body 29 includes: a shaft core part 68 having a shaft shape cleaning body base part 61, a pair of shaft end parts 62, 63 fixed to the respective ends of the cleaning body base part 61, and a pair of journal parts 66, 67 fixed to each one of the pair of shaft end parts 62, 63; a pair of rotatable bearings 72, 73 respectively arranged in the pair of journal parts 66, 67; a cleaning body 52 arranged in the cleaning body base part 61; a bearing protection part 75 for enclosing the bearing 73; and a shaft core end sheath part 78 that covers the shaft end part 63 across a gap 76 and has a cylindrical part 77 for winding filamentous dust.

Description

  Embodiments according to the present invention relate to a rotary cleaning body, a suction port body, and a vacuum cleaner.

  The rotary cleaning body provided in the suction port body includes a shaft core, a cleaning body such as a bristle brush extending from the shaft core, and a bearing that rotatably holds the shaft core on the suction port body. Bearings are provided at both ends of the shaft core.

  The suction port body includes a drive source such as a motor or a turbine that rotationally drives the rotary cleaning body.

JP 2010-238772 A

  The rotary cleaning body rotates and sweeps the surface to be cleaned. For this reason, thread-like dust such as hair and lint may wrap around the rotary cleaning body.

  By the way, the rotary cleaning body has a slight gap separating the bearing and a member adjacent to the bearing. The member adjacent to the bearing is a member that prevents the cleaning body from coming off, a pulley that receives power from a drive source, and the like. This gap prevents the contact between the member adjacent to the bearing and the bearing, and keeps the rotating cleaning body rotating smoothly.

  In the conventional rotary cleaning body, since the gap between the bearing adjacent to the bearing and the bearing is exposed, there is a possibility that thread-like dust may wrap around the gap. If thread-like dust is wound around the gap and the gap is filled, the rotational load increases, resulting in a reduction in the rotational speed of the rotary cleaning body and a rotation stop.

  Therefore, the present invention proposes a rotary cleaning body, a suction port body, and a vacuum cleaner that prevent an increase in rotational load and maintains smooth rotation.

  In order to solve the above problems, a rotary cleaning body according to an embodiment of the present invention includes a shaft-shaped cleaning body base, a pair of shaft end portions fixed to respective ends of the cleaning body base, and the pair of shafts. An axial core portion having a pair of journal portions fixed to each of the end portions, a pair of rotatable bearings provided in each of the pair of journal portions, a cleaning body provided in the cleaning body base, and the pair A shaft-end sheath having a cylindrical portion that covers one of the pair of shaft end portions with a gap and can be freely wound with thread-like dust.

  Further, the suction port body according to the embodiment of the present invention includes a suction port body having a suction port, a cleaning body support portion that supports the rotational cleaning body by arranging the rotary cleaning body at the suction port, and a drive that drives the rotary cleaning body. A source.

  Furthermore, the vacuum cleaner which concerns on embodiment of this invention has a vacuum cleaner main body, the electric blower accommodated in the said vacuum cleaner main body, and generate | occur | produces a negative pressure, The said rotary cleaning body has generate | occur | produced the said electric blower. A suction port body for sucking air at a negative pressure.

The perspective view which shows the vacuum cleaner which concerns on embodiment of this invention. The perspective view which shows the suction inlet concerning the embodiment of this invention from the right front. The top view which shows the inside of the suction inlet which concerns on embodiment of this invention. The top view which shows the rotary cleaning body which concerns on embodiment of this invention.

  Embodiments of a rotary cleaning body, a suction port body, and a vacuum cleaner according to the present invention will be described with reference to FIGS. 1 to 4.

  FIG. 1 is a perspective view showing a vacuum cleaner according to an embodiment of the present invention.

  As shown in FIG. 1, the vacuum cleaner 1 according to the present embodiment is a so-called canister-type vacuum cleaner. The vacuum cleaner 1 includes a vacuum cleaner body 2 that can run on a surface to be cleaned, and a pipe portion 3 that can be detachably connected to the cleaner body 2.

  The vacuum cleaner main body 2 includes a main body case 5, a pair of wheels 6 disposed on both sides of the main body case 5, a detachable dust separating and collecting portion 7 disposed in the front half of the main body case 5, and a main body. The electric blower 8 housed in the latter half of the case 5, a main body control unit 9 that mainly controls the operation of the electric blower 8, and a power cord 11 that guides electric power to the electric blower 8 are provided.

  The main body case 5 includes a main body connection port 12 as a joint that allows the pipe portion 3 to be freely attached and detached. The main body connection port 12 is a fluid inlet of the vacuum cleaner main body 2 and fluidly connects the pipe portion 3 and the dust separation and dust collection portion 7.

  The wheel 6 is a large-diameter traveling wheel.

  The dust separation and dust collection unit 7 separates dust from air containing dust (hereinafter referred to as “dust-containing air”) flowing from the surface to be cleaned through the tube unit 3 by the negative pressure generated by the electric blower 8. Collect and accumulate. On the other hand, the dust separating and collecting unit 7 sends clean air from which dust is removed to the electric blower 8.

  The main body control unit 9 includes a microprocessor (not shown), a storage device (not shown) that stores various arithmetic programs executed by the microprocessor, parameters, and the like. The main body control unit 9 stores a plurality of preset operation modes in the storage device. The plurality of operation modes set in advance correspond to user operations accepted by the pipe section 3. Each operation mode has different input values (input values of the electric blower 8). The main body control unit 9 reads the operation input by the user from the pipe unit 3, and selectively selects an arbitrary operation mode associated with the operation input from a plurality of preset operation modes, and according to the selected operation mode The electric blower 8 is operated.

  The power cord 11 supplies power to the cleaner body 2 from a wiring plug connector (not shown, so-called outlet). The power cord 11 includes a plug 14 provided at a free end.

  The pipe part 3 sucks dust-containing air from the surface to be cleaned and guides it to the cleaner body 2 by the negative pressure acting from the cleaner body 2 as the electric blower 8 is operated. The pipe section 3 is fluidly connected to the connection pipe 19 as a joint that is detachably connected to the cleaner body 2, the dust collection hose 21 that is fluidly connected to the connection pipe 19, and the dust collection hose 21. A hand operating tube 22, a gripping part 23 projecting from the hand operating tube 22, an operating part 24 provided on the gripping part 23, an extension tube 25 detachably connected to the hand operating tube 22, and an extension tube 25 And a suction port body 26 that is detachably connected.

  The connecting pipe 19 is fluidly connected to the dust separating and collecting part 7 through the main body connection port 12.

  The dust collection hose 21 is a long and flexible substantially cylindrical hose. One end of the dust collecting hose 21 (here, the rear end) is connected to the connecting pipe 19. The dust collecting hose 21 is fluidly connected to the dust separating and collecting part 7 through the connecting pipe 19.

  The hand operation tube 22 relays the dust collecting hose 21 and the extension tube 25. One end (here, the rear end) of the hand operating tube 22 is fluidly connected to the other end (here, the front end) of the dust collecting hose 21. The hand operating tube 22 is fluidly connected to the dust separating and collecting part 7 through the dust collecting hose 21 and the connecting tube 19.

  The grip part 23 is gripped by the user's hand in order to operate the vacuum cleaner 1. The gripping part 23 has an appropriate shape that can be easily gripped by the user and protrudes from the hand operating tube 22.

  The operation unit 24 includes a switch associated with each operation mode. Specifically, the operation unit 24 includes a stop switch 24 a that receives an input of an operation stop operation of the electric blower 8 and an activation switch 24 b that receives an input of an operation start operation of the electric blower 8. The operation unit 24 may include a weak operation switch (not shown), a medium operation switch (not shown), and a strong operation switch (not shown) separately from the start switch 24b. A user of the vacuum cleaner 1 operates the operation unit 24 to selectively select an operation mode of the electric blower 8. The start switch 24 b also functions as an operation mode selection switch during operation of the electric blower 8. In this case, every time the operation signal is received from the start switch 24b, the main body control unit 9 switches the operation mode in the order of strong → medium → weak → strong →. Note that the operation unit 24 may individually include a weak operation switch (not shown), a medium operation switch (not shown), and a strong operation switch (not shown) instead of the start switch 24b.

  The extension tube 25 is an elongated substantially cylindrical tube that can be expanded and contracted. The extension tube 25 has a telescopic structure in which a plurality of cylindrical bodies are overlapped. One end portion (here, the rear end portion) of the extension pipe 25 has a joint structure that is detachable from the other end portion (here, the front end portion) of the hand operation tube 22. The extension pipe 25 is fluidly connected to the dust separating and collecting part 7 through the hand operating pipe 22, the dust collecting hose 21 and the connecting pipe 19.

  The suction port body 26 has a structure capable of running or sliding on a surface to be cleaned such as a wooden floor or a carpet, and has a suction port 28 on the bottom surface facing the surface to be cleaned in the running state or the sliding state. The suction port body 26 includes a rotatable rotary cleaning body 29 disposed in the suction port 28 and an electric motor 31 that drives the rotary cleaning body 29. One end portion (here, the rear end portion) of the suction port body 26 and the other end portion (here, the front end portion) of the extension pipe 25 have a detachable joint structure. The suction port body 26 is fluidly connected to the dust separation and collection part 7 through the extension pipe 25, the hand operation pipe 22, the dust collection hose 21 and the connection pipe 19.

  The electric vacuum cleaner 1 starts the electric blower 8 when the start switch 24b accepts the operation start operation. For example, when the vacuum cleaner 1 receives an operation on the start switch 24b in a state where the electric blower 8 is stopped, first, the electric blower 8 is operated in the strong operation mode and then an operation on the start switch 24b is received again. The electric blower 8 is operated in the medium operation mode, and when the operation for the start switch 24b is accepted three times, the electric blower 8 is operated in the weak operation mode, and the same is repeated thereafter. The strong operation mode, the medium operation mode, and the weak operation mode are a plurality of operation modes set in advance. The input value to the electric blower 8 is set smaller in the order of the strong operation mode, the medium operation mode, and the weak operation mode. The started electric blower 8 exhausts air from the dust separating and collecting part 7 and makes the inside of the negative pressure (suction negative pressure).

  The negative pressure of the dust separating and collecting part 7 is sucked into the suction port body 26 through the main body connection port 12, the connection tube 19, the dust collection hose 21, the hand control tube 22, the extension tube 25 and the suction port body 26 in order. Acts on the mouth 28. The vacuum cleaner 1 cleans the surface to be cleaned by sucking dust on the surface to be cleaned together with air by the negative pressure applied to the suction port 28. The dust separating and collecting unit 7 separates and accumulates dust from the dust-containing air sucked into the vacuum cleaner 1. On the other hand, the dust separating and collecting unit 7 sends the air separated from the dust-containing air to the electric blower 8. The electric blower 8 exhausts the air sucked from the dust separating and collecting part 7 to the outside of the cleaner body 2.

  Next, the suction port body 26 will be described in detail.

  FIG. 2 is a perspective view showing the suction port body according to the embodiment of the present invention from the right front side.

  As shown in FIG. 2, the suction port body 26 according to the present embodiment includes a box-shaped suction port body 32 having a substantially rectangular parallelepiped shape, and a connecting pipe portion 33 disposed at the rear part of the suction port body 32.

  The suction inlet body 32 has a rectangular appearance that is short in the front-rear direction and long in the left-right direction in plan view. In addition, let the solid arrow X direction in FIG. 2 be the front direction or the advancing direction of the suction inlet 26, and let the opposite direction be a back direction or a retreat direction. Further, the solid arrow Y direction in FIG. 2, that is, the left hand direction when viewed from the user of the vacuum cleaner 1 is the left direction, and the opposite direction is the right direction. Further, the solid arrow Z direction in FIG. 2, that is, the head side of the user of the vacuum cleaner 1 is the upward direction, and the opposite direction is the downward direction.

  The suction port body 32 includes a rectangular case body 35 having a short side in the front-rear direction and a long side in the left-right direction in plan view. The case body 35 includes a box-shaped lower case 36 that opens upward, and an upper case 37 that covers the lower case 36 from above. The upper case 37 includes an upper front case 38 on the front half side and an upper rear case 39 on the rear half side.

  The connecting pipe part 33 is provided in the rear part of the suction inlet main body 32 and the substantially central part in the width direction. In addition, the connection pipe part 33 includes a rotary connection pipe part 41 that is rotatably supported with respect to the suction port body 32, and a swing connection pipe part 42 that is swingably supported with respect to the rotary connection pipe part 41. .

  The rotary connecting pipe portion 41 rotates around an axis (an axis that coincides with the X axis or an axis that is parallel to the X axis) along the front-rear direction of the suction port body 26.

  The swing connection pipe part 42 swings about an axis orthogonal to the rotation axis of the rotary connection pipe part 41 (an axis coinciding with the X axis or an axis parallel to the X axis). The free end of the oscillating connection pipe 42 has a joint structure that can be attached to and detached from the extension pipe 25.

  FIG. 3 is a plan view showing the inside of the suction port body according to the embodiment of the present invention.

  As shown in FIG. 3, the suction port body 26 according to this embodiment includes an electric motor 31 provided in the lower case 36 and a suction port body control unit 43 provided in the lower case 36.

  The lower case 36 of the suction port body 26 includes a suction chamber 45 in which the rotary cleaning body 29 is accommodated, a machine chamber 46 in which the electric motor 31 is accommodated, a bearing chamber 47, and a control in which the suction port body control unit 43 is accommodated. A chamber 48.

  The upper rear case 39 covers the machine chamber 46 and the control chamber 48, and the upper front case 38 covers the suction chamber 45.

  The suction chamber 45 is partitioned in the front half of the suction port body 32 and extends in the width direction of the suction port body 32. The suction chamber 45 is opened toward the bottom surface of the suction port body 32 through the suction port 28.

  The machine room 46 is partitioned from the right half of the rear half of the suction port body 32 to the right side. The machine chamber 46 surrounds the right side of the suction chamber 45 and the right rear half.

  The machine chamber 46 and the bearing chamber 47 include a pair of cleaning body support portions 51 that detachably support the rotary cleaning body 29 by placing it at the suction port 28. One of the cleaning body support portions 51 is disposed in the machine chamber 46 and provided on the inner surface of the right side wall of the lower case 36. The other of the cleaning body support portions 51 is disposed in the bearing chamber 47 and provided on the inner surface of the left side wall of the lower case 36.

  Note that the machine chamber 46 and the bearing chamber 47 may be arranged so as to be horizontally reversed with respect to the suction port body 26.

  The control chamber 48 is partitioned into the left half of the second half of the suction port body 32. The control chamber 48 is arranged in the left half part behind the suction chamber 45.

  The rotary cleaning body 29 is accommodated in the suction chamber 45 and directs the rotation center line in the width direction of the suction port body 32. The rotary cleaning body 29 is detachably supported by the suction port body 32. The rotary cleaning body 29 can be taken out from the suction chamber 45. The rotary cleaning body 29 is driven by an electric motor 31. The rotary cleaning body 29 is provided with a cleaning body 52 over almost the entire width of the portion disposed in the suction port 28.

  The electric motor 31 is a drive source that drives the rotary cleaning body 29. The electric motor 31 is disposed in a rear portion of the suction chamber 45 in the machine chamber 46. The electric motor 31 includes an output shaft 31 a that protrudes toward the inner surface of the right side wall of the suction port body 32. The rotation center line of the output shaft 31 a is disposed substantially parallel to the rotation center line of the rotary cleaning body 29. Note that the suction port body 26 may include an air turbine instead of the electric motor 31 as a power source.

  The suction port body control unit 43 controls the operation of the electric motor 31 with electric power supplied from the cleaner body 2 through the connection pipe 19, the dust collection hose 21, the hand operation pipe 22 and the extension pipe 25.

  Further, the suction port body 26 includes a trumpet-shaped relay pipe 49 that fluidly relays the suction chamber 45 and the connection pipe portion 33 (more specifically, the rotary connection pipe portion 41), and the electric motor 31 to the suction port main body 32. An electric motor support portion 54 that floats, a main driving gear 50 that is fixed to the free end portion of the output shaft 31 a of the electric motor 31, a driven gear 53 that is provided in the rotary cleaning body 29, and the main driving gear 50 and the driven gear 53. And an endless belt 55 that is wound and transmits a driving force from the electric motor 31 to the rotary cleaning body 29.

  The relay pipe 49 is disposed at the rear center of the suction chamber 45, that is, between the machine chamber 46 and the control chamber 48, and separates the machine chamber 46 and the control chamber 48.

  The motor support portion 54 is interposed between the suction port body 32 and the motor 31 to block vibration. The motor support portion 54 is a rubber elastic body such as silicon rubber or an elastic body such as a spring. The motor support portion 54 blocks vibrations associated with the operation of the motor 31 from being transmitted to the suction port body 32, while blocking shocking external forces applied to the suction port body 32 from being transmitted to the motor 31.

  The main driving gear 50, the driven gear 53, and the belt 55 are transmission mechanisms 57 that transmit the driving force of the electric motor 31 to the rotary cleaning body 29, and include teeth 50a, 53a, and 55a that mesh with each other.

  The driven gear 53 is disposed in the left side portion of the suction chamber 45 in the machine chamber 46.

  The belt 55 is in the machine chamber 46 and is wound around the driven gear 53 and the main driving gear 50. The belt 55 is reinforced with a wire (not shown).

  Next, the rotary cleaning body 29 will be described in detail.

  FIG. 4 is a plan view showing the rotary cleaning body according to the embodiment of the present invention.

  As shown in FIGS. 3 and 4, the rotary cleaning body 29 according to the present embodiment includes a shaft-shaped cleaning body base 61 and a pair of shaft end portions 62 and 63 fixed to the respective ends of the cleaning body base 61. , And a shaft core portion 68 having a pair of journal portions 66, 67 fixed to the pair of shaft end portions 62, 63, and a pair of rotatable bearings 72, 73 provided in each of the pair of journal portions 66. A shaft core having a cleaning body 52 provided in the cleaning body base 61, a bearing protection portion 75 that encloses the bearing 73, and a cylindrical end portion 77 that covers the shaft end portion 63 with a gap 76 therebetween and can be freely wound with thread dust. An end sheath portion 78.

  The shaft core portion 68 is bridged between a pair of cleaning body support portions 51 provided on the inner surfaces of the left and right side walls of the suction port body 32.

  The cleaning body base 61 extends over substantially the entire width of the suction chamber 45 and occupies most of the shaft core portion 68. The cleaning body base 61 is, for example, an integrally molded product of synthetic resin or aluminum and has a cylindrical appearance. The cleaning body base 61 has a plurality of grooves 81 extending in the rotation center line direction (longitudinal direction) of the shaft core portion 68. The plurality of grooves 81 hold the cleaning body 52, extend over the entire length of the cleaning body base 61, and are arranged at substantially equal intervals on the outer peripheral surface of the cleaning body base 61. The plurality of grooves 81 may extend linearly along the rotation center line direction (longitudinal direction) of the shaft core portion 68 or may be twisted spirally.

  Each of the shaft end portions 62 and 63 is an integrally molded product of synthetic resin. In order to simplify the description, in the following description, it is assumed that one shaft end 62 is disposed on the right side (the left side in FIGS. 3 and 4) of the suction port body 26, and the other shaft end 62 is Suppose that it is arrange | positioned at the left side (right side in FIG. 3 and FIG. 4) of the suction inlet body 26. FIG.

  The cleaning body 52 is, for example, a blade that is a wiping member, brush hair that is a scraping member, or a combination thereof. The cleaning body 52 extends in the direction orthogonal to the rotation center line of the rotary cleaning body 29, that is, in the radial direction of the cleaning body base 61, and continues in a band shape across both ends of the cleaning body base 61. The proximal end side of the cleaning body 52 is held in the groove of the cleaning body base 61.

  One shaft end portion 62 has a cylindrical shape and is connected to the cleaning body base 61, a small diameter portion 83 that is connected to the joint portion 82 and has a smaller diameter than the joint portion 82, and a small diameter And a driven gear 53 that has a cylindrical shape larger in diameter than the portion 83 and is connected to the small diameter portion 83.

  The shaft end 62 is disposed coaxially with the cleaning body base 61. In other words, the cleaning body base 61, the joint portion 82, the small diameter portion 83, and the driven gear 53 are arranged coaxially with each other.

  The joint portion 82 is connected to the cleaning body base 61. The joint portion 82 includes protrusions (not shown) such as claws that are fitted into the grooves 81 of the cleaning body base 61. The joint portion 82 is fixed to the end of the cleaning body base 61 in a state where one end of the groove 81 of the cleaning body base 61 is closed with a protrusion. The joint portion 82 also prevents the cleaning body 52 from coming out of the groove 81 of the cleaning body base 61.

  The driven gear 53 is a part of the transmission mechanism 57. The driven gear 53 has a cylindrical shape smaller in diameter than the joint portion 82. Teeth 53 a are provided on the outer peripheral portion of the driven gear 53. The teeth 53 a are arranged at substantially equal intervals along the rotation center line direction of the shaft core portion 68 and in the circumferential direction of the driven gear 53. At the end of the driven gear 53 on the small diameter portion 83 side, a flange portion 85 is provided over the entire circumference. The flange portion 85 protrudes in a flange shape in a direction perpendicular to the rotation center line of the shaft core portion 68 (that is, the radial direction of the driven gear 53).

  In addition, the end of the driven gear 53 on the side of the bearing 72 is provided with a recess 53b having a hollow shape that allows the bearing 72 to partially enter.

  The bearing 72 is provided with an elastic member 86 that is sandwiched between the bearing 72 and the cleaning body support portion 51 of the suction port body 32. The elastic member 86 is pressed and held by the cleaning body support portion 51 of the suction port body 32. That is, the elastic member 86 is held in a compressed state so as not to lose elasticity. As a result, the bearing 72 is elastically supported by the suction port body 32 with the elastic member 86 interposed therebetween and is prevented from rotating.

  The other shaft end portion 63 includes a joint portion 87 that has a cylindrical shape and is connected to the cleaning body base portion 61, and an extension portion 88 that extends from the joint portion 87 in the axial direction.

  The shaft end portion 63 is disposed coaxially with the cleaning body base portion 61. In other words, the cleaning body base 61, the joint portion 87, and the extension portion 88 are arranged coaxially with each other.

  The joint 87 is connected to the cleaning body base 61. The joint portion 87 includes protrusions (not shown) such as claws that are fitted into the grooves 81 of the cleaning body base 61. The joint 87 is fixed to the end of the cleaning body base 61 in a state where the other end of the groove 81 of the cleaning body base 61 is closed with a protrusion. The joint portion 87 also prevents the cleaning body 52 from coming out of the groove 81 of the cleaning body base 61.

  The extension portion 88 has a cylindrical shape having the same diameter as the joint portion 87. At the end of the extension portion 88 on the bearing 73 side, a recessed portion 89 having a hollow shape that allows the bearing 73 to partially enter is provided.

  The journal part 66 is a part of a shaft 91 made of metal such as stainless steel. The shaft body 91 is fixed to the shaft end portion 63 by insert molding or the like. That is, the journal portion 67 is a part of the shaft body 91 protruding from the shaft end portion 63. The journal portion 67 is slidably in contact with the inner peripheral surface of the bearing 73.

  The journal portion 67 is disposed concentrically with respect to the rotation center line of the shaft core portion 68. The shaft body 91 includes a bearing holding flange 92 that is adjacent to the journal portion 67 and has a larger diameter than the journal portion 67. The bearing holding flange 92 prevents the bearing 73 from dropping from the journal portion 67 while allowing the bearing 73 to rotate.

  The bearing 73 is in contact with the journal portion 67 and rotatably holds the rotary cleaning body 29, while being removed from the shaft body 91 in order to prevent the rotary cleaning body 29 from falling off and being lost when the rotary cleaning body 29 is removed from the suction port body 26. With no structure. Specifically, the bearing 73 includes a bearing body 93 that has a cylindrical shape and contacts the journal portion 67, and a bearing cover 95 that serves to prevent the bearing body 93 from coming off.

  The bearing cover 95 includes a flange portion 96 that is hooked on the bearing holding flange 92 of the shaft body 91 and prevents the entire bearing 73 from dropping off, and a frame body portion 97 that is fixed to the flange portion 96 and holds the bearing body 93. The frame body portion 97 has a cylindrical shape that opens in the axial end direction of the shaft core portion 68. Further, the frame body portion 97 has a rectangular outer peripheral shape when viewed in the direction of the rotation center line of the shaft core portion 68 in order to prevent rotation with respect to the cleaning body support portion 51 of the suction port body 32.

  The bearing body 93 is a sliding bearing impregnated with lubricating oil, and is a so-called oilless bearing that exhibits self-lubricating properties. The bearing body 93 is press-fitted and held in the frame body portion 97 of the bearing cover 95.

  In addition, the structure of the journal part 67 and the bearing 73 so far is the same also in the journal part 66 and the bearing 72 in the edge part of one side of the rotary cleaning body 29. FIG.

  The bearing 73 includes a shape retaining frame 98 that is provided on the bearing cover 95 and maintains the shape of the inner peripheral surface of the cylindrical portion 77.

  The shape retaining frame 98 has a cylindrical shape and is integrally formed with the bearing cover 95. The shape retaining frame 98 extends from the bearing cover 95 toward the shaft end portion 63 and reaches the extension portion 88. The shape-retaining frame 98 maintains the smooth rotation of the rotary cleaning body 29 with a gap 101 between it and the extension 88. The shape-retaining frame 98 may be a cylinder having a thickness over the entire circumference, or may be a cage-shaped frame having a partial opening.

  The shaft end sheath portion 78 is a molded product made of an elastic material such as rubber or elastomer, and has a thickness (for example, about 0.5 mm to 1 mm) that can be easily deformed by human power. The shaft end sheath portion 78 has a bottomed cylindrical shape that opens in the direction of the cleaning body 52, and has a stepped appearance from the small diameter bearing protection portion 75 to the large diameter cylindrical shape portion 77.

  The bearing protection part 75 encloses the bearing 73 while holding the bearing 73 on the inner peripheral surface. The bearing protection portion 75 has a quadrangular shape corresponding to the outer shape of the bearing 73. The bearing protection part 75 is pressurized and held by the cleaning body support part 51 of the suction port body 32. That is, the shaft end sheath portion 78 is held in a compressed state so as not to lose elasticity. Thereby, the bearing 73 is elastically supported by the suction inlet main body 32 with the bearing protection part 75 interposed therebetween, and is prevented from rotating.

  The tubular portion 77 covers the shape retaining frame 98 to separate the gap 76 from the shaft end portion 63. The cylindrical portion 77 includes a flange-shaped flange portion 102 that protrudes radially outward at an end facing the cleaning body 52.

  By the way, the vacuum cleaner 1 which concerns on this embodiment sucks in dust, rotating the rotary cleaning body 29 with the electric motor 31. FIG. At this time, there are cases where long fibrous dust such as hair and lint on the surface to be cleaned is wrapped around the rotary cleaning body 29.

  A portion where the fibrous dust is easily wound is around the cleaning body 52 and the cleaning body base 61. However, even if fibrous dust wraps around these locations, the rotary cleaning body 29 can continue to rotate, and therefore does not affect the operation of the vacuum cleaner 1.

  However, when fibrous dust is sandwiched between the shaft core portion 68 and the bearings 72 and 73, relative rotation between the shaft core portion 68 and the bearings 72 and 73 is hindered, that is, the rotary cleaning body 29 rotates. There is a risk of disappearing.

  Therefore, the rotary cleaning body 29 according to this embodiment includes an axial end sheath portion 78. In the rotary cleaning body 29, the fibrous dust reaches between the shaft portion 68 and the bearing 73 by winding the fibrous dust around the shaft end sheath portion 78 (specifically, the cylindrical portion 77). And the rotational operation of the rotary cleaning body 29 is maintained.

  The user pulls out the shaft end sheath portion 78 from the shape-retaining frame body 98, deforms it, and reduces the diameter so that the fiber shape is wound around the shaft end sheath portion 78 (specifically, the tubular portion 77). Can easily remove dust.

  On the other hand, the rotary cleaning body 29 includes a driven gear 53 on the bearing 72 side of the shaft core portion 68. A belt 55 is wound around the driven gear 53. For this reason, fibrous dust is unlikely to reach between the shaft core portion 68 and the bearing 72.

  Therefore, the vacuum cleaner 1, the suction port body 26, and the rotary cleaning body 29 according to the present embodiment include the shaft end sheath portion 78, so that the fibrous dust is removed from the shaft core portion 68 and the bearings 72 and 73. It is prevented from reaching between and smooth rotation drive is continued.

  Further, the vacuum cleaner 1, the suction port body 26, and the rotary cleaning body 29 according to the present embodiment include the elastic member 86 of the bearing 72 and the shaft end sheath portion 78 of the bearing 73 (specifically, the bearing protection portion 75). The vibration of the rotational drive is absorbed by the elasticity, and the transmission of the vibration to the suction port body 32 is suppressed. For this reason, the rotary cleaning body 29 suppresses the noise generated by the vibration associated with the rotational drive, thereby reducing the noise of the suction port body 26.

  Furthermore, the vacuum cleaner 1, the suction port body 26, and the rotary cleaning body 29 according to the present embodiment include the shaft end sheath portion 78 made of an elastic material that can be deformed by human power. This facilitates removal of the shaft end sheath portion 78 and facilitates removal of fibrous dust wound around the shaft end sheath portion 78.

  Furthermore, the vacuum cleaner 1, the suction port body 26, and the rotary cleaning body 29 according to the present embodiment include the shape retaining frame body 98 so that the fibrous dust is strongly wound around the shaft end sheath portion 78. Even if the diameter is reduced, the shaft end sheath portion 78 is prevented from coming into contact with the shaft end portion 63, and smooth rotation of the rotary cleaning body 29 is maintained.

  Therefore, according to the vacuum cleaner 1, the suction port body 26, and the rotary cleaning body 29 according to the present embodiment, an increase in rotational load can be prevented and smooth rotation can be maintained.

  The vacuum cleaner 1 according to the present embodiment is not limited to a canister type, but may be an upright type, a stick type, or a handy type.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Vacuum cleaner main body 3 Pipe part 5 Main body case 6 Wheel 7 Dust separation dust collection part 8 Electric blower 9 Main body control part 11 Power supply cord 12 Main body connection port 14 Plug 19 Connection pipe 21 Dust collection hose 22 Hand operation Pipe 23 Holding part 24 Operation part 24a Stop switch 24b Start switch 25 Extension pipe 26 Suction port body 28 Suction port 29 Rotating cleaning body 31 Electric motor 31a Output shaft 32 Suction port body 33 Connection pipe part 35 Case body 36 Lower case 37 Upper case 38 Upper front case 39 Upper rear case 41 Rotating connection pipe part 42 Swing connection pipe part 43 Suction port body control part 45 Suction chamber 46 Machine room 47 Bearing room 48 Control room 49 Relay pipe 50 Main gear 50a Tooth 51 Cleaning body support part 52 Cleaning Body 53 Driven Gear 53a Teeth 53b Recess 54 Electric Motor Support 55 Belt 55a Teeth 57 Transmission Mechanism 61 Cleaning Body Bases 62 and 63 Shaft end portions 66, 67 Journal portion 68 Shaft core portions 72, 73 Bearing 75 Bearing protector portion 76 Clearance 77 Tubular shape portion 78 Shaft end sheath portion 81 Groove 82 Joint portion 83 Small diameter portion 85 Ridge portion 86 Elastic member 87 Joint portion 88 Extension part 89 Concave part 91 Shaft body 92 Bearing holding flange 93 Bearing body 95 Bearing cover 96 Flange part 97 Frame body part 98 Shape-retaining frame body 101 Gap 102 Gutter part

Claims (5)

An axial core portion having a shaft-shaped cleaning body base, a pair of shaft end portions fixed to each end portion of the cleaning body base portion, and a pair of journal portions fixed to each of the pair of shaft end portions;
A pair of rotatable bearings provided in each of the pair of journal portions;
A cleaning body provided at the base of the cleaning body;
A rotary cleaning device comprising: a bearing protection portion that encloses one of the pair of bearings; and a shaft end sheath portion that covers one of the pair of shaft end portions with a gap therebetween and has a cylindrical portion around which thready dust can be freely wound. body. The rotary cleaning body according to claim 1, wherein the shaft core end sheath portion is made of an elastic material that can be deformed manually. The rotary cleaning body according to claim 1, further comprising a shape-retaining frame body that is provided on the bearing and maintains the shape of the inner peripheral surface of the cylindrical portion. A suction port body having a suction port;
The cleaning body support part which arrange | positions and supports the said rotational cleaning body of any one of Claim 1 to 3 in the said suction inlet,
A suction port body comprising: a drive source for driving the rotary cleaning body. The vacuum cleaner body,
An electric blower that is housed in the vacuum cleaner body and generates negative pressure;
A vacuum cleaner comprising: the rotary cleaning body according to any one of claims 1 to 3; and a suction port body that sucks in air with a negative pressure generated by the electric blower.

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