WO2017086359A1 - Pompe à air électrique - Google Patents

Pompe à air électrique Download PDF

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Publication number
WO2017086359A1
WO2017086359A1 PCT/JP2016/084007 JP2016084007W WO2017086359A1 WO 2017086359 A1 WO2017086359 A1 WO 2017086359A1 JP 2016084007 W JP2016084007 W JP 2016084007W WO 2017086359 A1 WO2017086359 A1 WO 2017086359A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
motor
worm wheel
piston
air pump
Prior art date
Application number
PCT/JP2016/084007
Other languages
English (en)
Japanese (ja)
Inventor
啓太 河合
Original Assignee
アスモ株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2016146537A external-priority patent/JP6772618B2/ja
Application filed by アスモ株式会社 filed Critical アスモ株式会社
Priority to CN201680067928.9A priority Critical patent/CN108431416B/zh
Priority to US15/776,789 priority patent/US10788027B2/en
Priority to DE112016005334.7T priority patent/DE112016005334B4/de
Publication of WO2017086359A1 publication Critical patent/WO2017086359A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids

Definitions

  • This disclosure relates to an electric air pump.
  • Japanese Patent No. 5374524 discloses a compressor device including an electric air pump.
  • This electric air pump includes a motor, a piston connected to the motor via a crank, and a cylinder that houses the piston.
  • the piston reciprocates in the cylinder to supply the air in the cylinder to other devices.
  • This disclosure provides an electric air pump that can be downsized.
  • a first aspect of the present disclosure includes a motor including a worm provided on a rotating shaft, a worm wheel meshed with the worm, and a rod having one end rotatably connected to the worm wheel. And is accommodated in a cylinder extending along the axial direction of the motor, connected to the other end of the rod, and reciprocally moved in the extending direction of the cylinder by the operation of the crank. And a piston for injecting air inside the cylinder from a valve provided at one end of the cylinder by moving toward one end of the cylinder.
  • a worm is provided on the rotating shaft of the motor.
  • a worm wheel constituting a crank is engaged with the worm, and one end of a rod constituting the crank is rotatably connected to the worm wheel.
  • a piston is connected to the other end of the rod.
  • the piston is accommodated in the cylinder, and the piston reciprocates in the extending direction of the cylinder by the operation of the crank. Then, as the piston moves toward one end of the cylinder, air inside the cylinder is injected from a valve provided at one end of the cylinder.
  • the cylinder extends along the axial direction of the motor.
  • the physique of the electric air pump in the radial direction of a motor can be reduced in size.
  • a second aspect of the present disclosure is the electric air pump according to the first aspect, wherein the cylinder is disposed adjacent to the outer side in the radial direction of the motor with respect to the motor housing portion that houses the motor. is there.
  • the cylinder is arranged adjacent to the outer side in the radial direction of the motor with respect to the motor housing portion that houses the motor. For this reason, a cylinder can be arrange
  • crank axis and the cylinder axis are offset in the radial direction of the motor as viewed from the axial direction of the worm wheel. It is an electric air pump.
  • the piston can be efficiently pushed out to the one end side of the cylinder by the rod. That is, when the crank is operated, the rod is reciprocated while swinging about the other end of the crank. Then, the crank axis and the cylinder axis are offset, so that the rod swings when the piston is moved toward one end of the cylinder as compared with the comparative example in which the crank axis and the cylinder axis coincide.
  • the moving angle can be reduced.
  • the rod can be moved to one end side of the cylinder along the cylinder axis. Thereby, a piston can be efficiently extruded to the one end side of a cylinder with a rod.
  • the axis of the crank is disposed between the axis of the cylinder and the axis of the motor as viewed from the axial direction of the worm wheel. It is an electric air pump.
  • the crank axis is disposed between the cylinder axis and the motor axis, the size of the electric air pump in the radial direction of the motor can be further reduced.
  • the rod is disposed on one side in the axial direction of the worm wheel, and the other side in the axial direction of the worm wheel.
  • An electric air pump in which a circuit board constituting a drive circuit for driving a motor is arranged.
  • the crank and the circuit board can be arranged side by side in the axial direction of the worm wheel. Therefore, the size of the electric air pump in the axial direction of the worm wheel can be reduced.
  • the portion of the rod that faces the worm wheel and the rotation axis direction of the worm wheel is from the outside in the rotation radial direction of the worm wheel. It is an electric air pump that extends linearly in the rotational radial direction of the worm wheel as viewed.
  • the space in which the rod is arranged can be saved as compared with the case where the bent portion for avoiding the rotating shaft of the worm wheel is formed on the rod. As a result, the electric air pump can be reduced in size.
  • a space in which the crank is disposed and a space in which a circuit board that constitutes a drive circuit that drives the motor is adjacent to each other in the rotational axis direction of the worm wheel.
  • the electric air pump is disposed, and is disposed so that a space in which the crank is disposed and a space in which the circuit board is disposed are overlapped in the moving direction of the piston and the piston.
  • the space in which the crank is disposed and the space in which the circuit board is disposed are disposed so as to overlap in the moving direction of the piston and the piston.
  • the worm wheel in the electric air pump can be downsized in the direction of the rotation axis.
  • FIG. 1 is a plan sectional view showing a state in which the piston has reached bottom dead center in the electric air pump according to the present embodiment.
  • FIG. 2 is a plan sectional view showing a state in which the piston has reached top dead center in the electric air pump shown in FIG.
  • FIG. 3 is a bottom view seen from below showing a state in which the second cover of the electric air pump shown in FIG. 1 is removed.
  • 4 is an enlarged side sectional view (sectional view taken along line 4-4 of FIG. 2) showing the inside of the crank / circuit housing portion shown in FIG.
  • the electric air pump 10 is configured as an electric air pump mounted on a vehicle (automobile).
  • the electric air pump 10 is configured as an electric air pump that is connected to an air blowing device that blows air onto an in-vehicle camera (lens) attached to a back door of the vehicle and supplies air to the air blowing device. Yes.
  • the directions of arrows A and B shown in FIG. Also, the arrow C and arrow D directions shown in FIGS. 1 to 3 perpendicular to the vertical direction are referred to as a first direction, and the arrow E and arrow F directions perpendicular to the first direction are referred to as a second direction.
  • the electric air pump 10 includes a housing 12 that constitutes an outline of the electric air pump 10, a motor 30 (see FIGS. 1 and 2), and a driving force of the motor 30 to the piston 50.
  • Crank 40 see FIG. 1 and FIG. 2
  • a check valve 60 as a “valve” for discharging (injecting) air (air) from the electric air pump 10
  • a drive for controlling the motor 30 Drive circuit 80 see FIG. 3
  • the housing 12 is formed in a substantially rectangular shape having a first direction as a longitudinal direction in a plan view seen from above, and is configured as a hollow structure.
  • the housing 12 also includes a motor housing portion 14 that houses a motor 30 that will be described later, a cylinder 16 that houses a piston 50 that will be described later, and a crank circuit housing that houses a crank 40 and a drive circuit 80 (circuit board 82) that will be described later. Part 18.
  • the motor housing portion 14 constitutes a part of the housing 12 on one side in the first direction (arrow C direction side in FIGS. 1 to 3) and one side in the second direction (arrow E direction side in FIGS. 1 to 3). ing. Moreover, the motor accommodating part 14 is formed in the substantially cylindrical shape which makes a 1st direction an axial direction.
  • the cylinder 16 is disposed adjacent to the other side in the second direction (the direction of the arrow F in FIGS. 1 to 3) with respect to the motor housing portion 14.
  • the cylinder 16 is formed in a substantially cylindrical shape having the first direction as an axial direction, and is formed integrally with the motor housing portion 14. That is, the cylinder 16 and the motor housing part 14 are arranged in parallel in the second direction (the radial direction of the motor housing part 14). For this reason, the axis L1 (see FIGS. 1 and 2) of the motor accommodating portion 14 and the axis L2 (see FIGS. 1 and 2) of the cylinder 16 are arranged in parallel.
  • the crank / circuit housing portion 18 is disposed adjacent to the motor housing portion 14 and the cylinder 16 on the other side in the first direction (arrow D direction side in FIGS. 1 to 3). As shown in FIG. 3, the crank / circuit housing portion 18 is formed in a substantially rectangular cylindrical shape opened in the vertical direction, and is formed integrally with the motor housing portion 14 and the cylinder 16. As shown in FIG. 4, the crank / circuit housing portion 18 is provided with a partition wall 20 that partitions the inside of the crank / circuit housing portion 18 in the vertical direction, and the motor housing portion 14 (see FIG. 4) (not shown in FIG. 4) and the end portion on the cylinder 16 side are bent downward in a substantially crank shape and formed integrally with the motor housing portion 14 and the cylinder 16.
  • crank housing part 18A the upper part (arrow A direction side of FIG. 4) divided by the partition wall 20 in the crank / circuit housing part 18 is a crank housing part 18A, and the inside of the crank housing part 18A and the motor housing part 14 and the inside of the cylinder 16 communicate with each other.
  • the opening of the crank housing portion 18 ⁇ / b> A is configured to be closed by the first cover 22.
  • the lower part (in the direction of arrow B in FIG. 4) partitioned by the partition wall 20 in the crank / circuit housing part 18 is a circuit housing part 18B, and the opening of the circuit housing part 18B is the first part. 2 is configured to be closed by the cover 24. That is, in the present embodiment, the crank housing portion 18A and the circuit housing portion 18B are arranged so as to overlap in the vertical direction with the partition wall 20 as a boundary.
  • the partition wall 20 is integrally formed with a shaft portion 20A for pivotally supporting a worm wheel 42 described later.
  • the shaft portion 20A is formed in a columnar shape, protrudes upward from the partition wall 20, and is disposed between the axis L1 of the motor housing portion 14 and the axis L2 of the cylinder 16 in plan view (see FIG. 1).
  • a plurality of (three in the present embodiment) bosses 20B for fixing a circuit board 82 to be described later are integrally formed on the partition wall 20, and the bosses 20B are formed in a columnar shape. , Projecting downward from the partition wall 20.
  • the bottom surface (tip surface) of the boss 20B is formed with a concave portion opened downward in the center.
  • a partition wall 21 is provided between the motor housing portion 14 and the crank housing portion 18A so as to separate the two and prevent the grease on the crank housing portion 18A side from scattering into the motor housing portion 14.
  • the motor 30 is configured as a so-called brushed DC motor.
  • the motor 30 has a substantially cylindrical motor body 30A.
  • the motor body 30A has a magnet 30C fixed to the inner peripheral surface and a magnetic body on the outer peripheral surface of the portion where the magnet 30C is fixed.
  • An attached (wrapped) yoke housing 30D is provided.
  • the motor main body 30 ⁇ / b> A is arranged coaxially with the motor housing portion 14 in the housing 12 and is fitted into the motor housing portion 14. And the rotating shaft 30B of the motor 30 is extended from the motor main body 30A to the other side in the first direction (the crank housing portion 18A side). For this reason, the axis of the motor 30 coincides with the axis L1 of the motor housing portion 14, and the above-described cylinder 16 extends along the axial direction of the motor 30.
  • One end portion in the longitudinal direction of the motor housing portion 14 (the end portion on the arrow C direction side in FIGS. 1 and 2) is closed by a substantially disc-shaped cap 26.
  • a worm shaft 32 is provided on the other side in the first direction (crank / circuit housing portion 18 side) with respect to the rotating shaft 30B.
  • the worm shaft 32 is arranged coaxially with the rotary shaft 30B, and an end portion on one side (rotary shaft 30B side) in the axial direction of the worm shaft 32 is connected to a tip portion of the rotary shaft 30B so as to be integrally rotatable. ing.
  • the worm shaft 32 is rotatably supported by a pair of bearings 36 at both ends in the longitudinal direction, and the pair of bearings 36 is fixed to a portion of the partition wall 20 on the crank housing portion 18A side.
  • a worm 34 is integrally formed at a longitudinal intermediate portion of the worm shaft 32, and a worm gear 34 ⁇ / b> A is formed on the outer periphery of the worm 34.
  • “the worm is provided on the rotating shaft” in the present disclosure includes the case where the worm 34 is provided separately on the rotating shaft 30B.
  • the worm shaft 32 and the rotary shaft 30B are configured separately, but the worm shaft 32 and the rotary shaft 30B may be configured integrally.
  • the crank 40 includes a worm wheel 42 and a rod 46.
  • the worm wheel 42 is formed in a substantially disk shape whose axial direction is the vertical direction, and is rotatably supported by the shaft portion 20 ⁇ / b> A of the housing 12. Thereby, the worm wheel 42 is accommodated in the crank accommodating portion 18A. Further, the outer peripheral portion of the worm wheel 42 is engaged with the worm 34 on the worm shaft 32 of the motor 30. The worm wheel 42 and the worm 34 are coated with lubricating grease. Further, the worm wheel 42 is provided with a crank pin 44 for connecting a rod 46 described later to the worm wheel 42.
  • the crank pin 44 is formed in a substantially cylindrical shape and protrudes upward from the worm wheel 42.
  • the worm wheel 42 is formed with a concave support hole 42 ⁇ / b> A opened upward, and the crank pin 44 is inserted into the support hole 42 ⁇ / b> A via one end of the rod 46. And is supported by the support hole 42A.
  • a large diameter portion 44 ⁇ / b> A larger than the diameter of the crankpin 44 is integrally formed at the upper end portion of the crankpin 44. Thereby, the rod 46 is prevented from coming out from the crank pin 44 in the axial upper side (direction of arrow A in FIG. 4).
  • the rod 46 is formed in a substantially long plate shape in which the vertical direction is the plate thickness direction.
  • the rod 46 extends along the first direction (the extending direction of the cylinder 16), is bent into a substantially V shape opened to the motor housing portion 14 side in plan view, and is vertically It is not bent in the direction (plate thickness direction).
  • a portion on one end side of the rod 46 is disposed on the upper side of the worm wheel 42, and one end portion of the rod 46 is rotatably supported by the crank pin 44 with the vertical direction as an axial direction. Specifically, as shown in FIG.
  • a first connection hole 46 ⁇ / b> A is formed through one end of the rod 46, and the first connection hole 46 ⁇ / b> A is disposed coaxially with the support hole 42 ⁇ / b> A of the worm wheel 42.
  • the outer diameter of the crank pin 44 and the inner diameter of the support hole 42A are set to be substantially the same size, and the inner diameter of the first connecting hole 46A is set slightly larger than the outer diameter of the crank pin 44. .
  • the crank pin 44 is inserted into the first connecting hole 46A and fitted into the support hole 42A. Thereby, the one end part of the rod 46 is rotatably supported by the crankpin 44.
  • the intermediate portion in the longitudinal direction of the rod 46 is bent in a substantially crank shape on the lower side at a position radially outside the worm wheel 42. And the part of the other end side of the rod 46 is arrange
  • the portion of the rod 46 that faces the worm wheel 42 (the portion that faces the rotational axis direction of the worm wheel 42) is linear in the rotational radial direction of the worm wheel 42 as viewed from the outside in the rotational radial direction of the worm wheel 42. And it extends in parallel to the surface of the worm wheel 42.
  • the rod 46 and the shaft portion 20A are arranged with a predetermined clearance.
  • the piston 50 is formed in a substantially bottomed cylindrical shape opened to the other side in the first direction, and is disposed coaxially with the cylinder 16. 16 is movably accommodated inside. Thereby, the axis line of the piston 50 and the axis line L2 of the cylinder 16 coincide.
  • the outer diameter of the piston 50 is set to be approximately the same as the inner diameter of the cylinder 16, and a seal member (not shown) is interposed between the piston 50 and the cylinder 16.
  • the piston 50 is disposed so as to straddle in the vertical direction from the crank housing portion 18A to the circuit housing portion 18B. In other words, the crank housing portion 18 ⁇ / b> A and the circuit housing portion 18 ⁇ / b> B are arranged so as to overlap in the moving direction of the piston 50 and the piston 50.
  • a connecting shaft 52 whose axial direction is the vertical direction is fixed inside the piston 50, and the connecting shaft 52 is disposed so that the axis of the connecting shaft 52 passes through the axis L2 of the piston 50.
  • the other end of the rod 46 described above is disposed inside the piston 50 and is rotatably connected to the connecting shaft 52. Thereby, the piston 50 and the crank 40 are connected. More specifically, a fixed hole 50B is formed in the axially intermediate portion of the piston 50 so as to penetrate in the vertical direction. In addition, a second connection hole 46B is formed through the other end of the rod 46, and the second connection hole 46B is disposed coaxially with the fixed hole 50B.
  • the inner diameter of the fixed hole 50 ⁇ / b> B and the outer diameter of the connecting shaft 52 are set to be substantially the same size, and the inner diameter of the second connecting hole 46 ⁇ / b> B is set slightly larger than the outer diameter of the connecting shaft 52. .
  • the connecting shaft 52 is inserted into the fixed hole 50B and inserted into the second connecting hole 46B. Thereby, the other end part of the rod 46 is connected with the connection shaft 52 so that rotation is possible.
  • the piston 50 is configured to reciprocate along the axis L2 of the cylinder 16.
  • the rotation shaft 30B of the motor 30 is rotated to the one side in the rotation direction (forward rotation), so that the worm wheel 42 is rotated around the axis of the shaft portion 20A on one side in the rotation direction (FIGS. 1 and 2).
  • the piston 50 is configured to reciprocate along the axis L2 (first direction) of the cylinder 16 by the rod 46.
  • the axis L3 of the crank 40 (specifically, a line that passes through the rotation center of the worm wheel 42 and extends along the moving direction (first direction) of the piston 50) becomes the axis L2 of the piston 50 (cylinder 16).
  • the axis L2 of the piston 50 and the axis L1 of the motor 30 are set to extend in parallel. That is, the axis L3 of the crank 40 is offset from the axis L2 of the piston 50 (cylinder 16) on one side in the second direction (motor 30 side).
  • the position where the piston 50 is moved most to the one side in the first direction is referred to as bottom dead center (the position shown in FIG. 1).
  • the position most moved to the side is referred to as top dead center (position shown in FIG. 2).
  • the movement of the piston 50 to one side in the first direction is the forward movement of the piston 50, and the movement of the piston 50 to the other side in the first direction (piston 50).
  • the movement from the bottom dead center to the top dead center is the return movement of the piston 50.
  • the rod 46 is bent into a substantially V shape opened to the motor housing portion 14 side in a plan view. Thereby, when the crank 40 is operated, the bent portion of the rod 46 prevents the rod 46 from interfering with the motor housing portion 14.
  • a plurality of suction ports 50A are formed through one end (bottom wall) of the piston 50 in the central portion.
  • the inside of the piston 50 inside the crank housing portion 18A
  • the inside of the cylinder 16 are communicated with each other through the suction port 50A.
  • a suction valve 54 having a substantially umbrella shape is provided on one side in the first direction with respect to the piston 50.
  • the suction valve 54 is formed in a substantially disk shape in which the axial direction of the piston 50 is the plate thickness direction, and the outer peripheral portion of the suction valve 54 is inclined toward the piston 50 side toward the radially outer side. Has been.
  • the suction valve 54 is attached to one end (bottom wall) of the piston 50 by a screw 56, and the head of the screw 56 is disposed on one side in the first direction with respect to the suction valve 54.
  • a washer 58 is interposed between the head of the screw 56 and the suction valve 54.
  • the suction valve 54 is configured as a check valve. That is, when the piston 50 moves forward, the outer peripheral portion of the suction valve 54 is brought into contact with one end portion of the piston 50 so that the suction valve 54 is closed. On the other hand, when the piston 50 moves backward, the inside of the cylinder 16 becomes negative pressure, and the air sucked from the outside of the electric pump 10 moves toward the inside of the cylinder 16, thereby opening the outer peripheral portion of the suction valve 54. Thus, air (air) is sucked into the cylinder 16 from the suction port 50A (away from one end of the piston 50).
  • the check valve 60 includes a valve main body 62, a lid 64, a stopper 66, a stopper spring 68, and a valve 70.
  • the valve main body 62 is formed in a substantially bottomed cylindrical shape opened to the other side in the first direction, and the opening end of the valve main body 62 is fitted into one end of the cylinder 16. As a result, one end of the cylinder 16 is closed by the valve body 62.
  • a stopper accommodating portion 62A for accommodating a stopper 66 described later is formed inside the valve main body 62.
  • the stopper accommodating portion 62A is formed in a concave shape opened to the cylinder 16 side, and has a substantially circular cross section in the second direction.
  • a substantially cylindrical connecting portion 62B is integrally formed on the bottom wall of the valve main body 62.
  • the connecting portion 62B is disposed coaxially with the axis L2 of the cylinder 16, and is connected to the bottom of the valve main body 62. It protrudes from the wall to one side in the first direction (one side in the axial direction of the cylinder 16).
  • a hose (not shown) is connected to the connecting portion 62B, and air is supplied from the electric air pump 10 into the hose, and the air is supplied to the air blowing device.
  • a substantially cylindrical mounting cylinder 62C for mounting a stopper spring 68 described later is integrally formed on the bottom wall of the valve main body 62, and the mounting cylinder 62C is coaxial with the connection 62B. It is arranged and protrudes toward the stopper accommodating portion 62A. And the inside of the connection part 62B and the attachment cylinder part 62C is connected, and this connected part is used as the exhaust passage 62D. Thereby, the exterior (inside of the hose) of the electric air pump 10 and the stopper accommodating portion 62A communicate with each other by the exhaust passage 62D. Furthermore, the opening end on the connection portion 62B side in the exhaust passage 62D is an exhaust port 62E.
  • the lid portion 64 is formed in a bottomed cylindrical shape having a relatively shallow bottom that is open to the other side in the first direction.
  • the lid portion 64 is disposed inside one end portion of the cylinder 16 and is fitted into the opening end portion of the valve main body portion 62.
  • the bottom wall of the lid portion 64 is formed with a protruding portion 64A that protrudes to one side in the first direction, and the protruding portion 64A is fitted into the opening end portion of the stopper accommodating portion 62A.
  • a substantially circular exhaust hole 64B is formed through the protruding portion 64A, and the exhaust hole 64B is disposed coaxially with the axis L2 of the cylinder 16.
  • the stopper 66 has a bottomed cylindrical stopper body 66A opened to one side in the first direction.
  • the stopper main body 66A is accommodated in the stopper accommodating portion 62A of the valve main body 62 so as to be movable in the first direction (the axial direction of the cylinder 16). Accordingly, the stopper 66 is configured to be movable between an open position shown in FIG. 1 and a closed position shown in FIG.
  • a plurality of communication holes 66A1 are formed in the bottom wall of the stopper main body 66A.
  • the communication holes 66A1 are arranged side by side in the circumferential direction of the stopper main body 66A, and are arranged with respect to the exhaust hole 64B of the lid portion 64 described above. Arranged radially outward.
  • a stopper spring 68 configured as a compression coil spring is provided between the bottom wall of the stopper main body 66A and the bottom wall of the valve main body 62 in a compressed and deformed state.
  • a mounting cylinder 62C is inserted into one end of the stopper spring 68, and the other end of the stopper spring 68 is disposed in the stopper main body 66A and is in contact with the bottom wall of the stopper main body 66A. . Accordingly, the stopper 66 is urged by the stopper spring 68 toward the other side in the axial direction of the cylinder 16 (the lid portion 64 side), and is arranged at the closed position.
  • a substantially cylindrical stopper shaft 66B is integrally formed at the center of the bottom wall of the stopper main body 66A, and the stopper shaft 66B projects from the bottom wall of the stopper main body 66A toward the lid 64. Yes.
  • the outer diameter of the stopper shaft 66B is set smaller than the inner diameter of the exhaust hole 64B, and the stopper shaft 66B is inserted into the exhaust hole 64B.
  • the valve 70 is formed in a substantially annular plate shape.
  • a stopper shaft 66B is fitted inside the valve 70, and the valve 70 is disposed radially outward with respect to the proximal end portion of the stopper shaft 66B.
  • the outer diameter of the valve 70 is set larger than the inner diameter of the exhaust hole 64B.
  • the exhaust hole 64B is closed by the valve 70 in a state where the stopper 66 is disposed at the closed position.
  • the valve 70 is disposed radially inward with respect to the communication hole 66A1 of the stopper main body 66A.
  • the outer diameter of the valve 70 is set so as to be disposed on the radially inner side with respect to the communication hole 66A1.
  • the exhaust hole 64B is opened by moving the stopper 66 to the open position side, and the inside of the cylinder 16 and the outside of the electric air pump 10 are connected by the exhaust hole 64B, the communication hole 66A1, and the exhaust passage 62D. It is configured to communicate.
  • the drive circuit 80 is configured as a circuit that controls the drive of the motor 30 described above.
  • the drive circuit 80 includes a circuit board 82 having a substantially rectangular plate shape, and the circuit board 82 is accommodated in the circuit accommodating portion 18B with the vertical direction (the axial direction of the worm wheel 42) as the plate thickness direction. Yes.
  • the circuit board 82 is placed on the tip of the boss 20B of the partition wall 20 in the housing 12, and the screw 84 is screwed into the recess of the boss 20B. 12 is fixed.
  • a connector 86 for supplying power to the drive circuit 80 is mounted on the circuit board 82, and the connector 86 projects from the housing 12 to the other side in the first direction.
  • the circuit board 82 is electrically connected to the motor 30, and electronic components (not shown) that drive and control the motor 30 are mounted on the circuit board 82.
  • the drive of the motor 30 is controlled by the drive circuit 80.
  • the rotary shaft 30B of the motor 30 is rotated to one side in the rotation direction (forward rotation).
  • the worm shaft 32 provided so as to be integrally rotatable with the rotation shaft 30B rotates to one side in the rotation direction, and the crank 40 operates.
  • the worm wheel 42 is rotated to one side in the rotational direction around the axis of the shaft portion 20 ⁇ / b> A, and the piston 50 connected by the rod 46 has a top dead center and a bottom dead center along the axial direction of the cylinder 16. Move back and forth between.
  • the piston 50 reciprocates between the top dead center and the bottom dead center, so that the compressed air (air) in the cylinder 16 flows through the hose. Supplied to the spraying device.
  • the housing 12 that constitutes the outline of the electric air pump 10 includes a motor accommodating portion 14 that accommodates the motor 30 and a cylinder 16 that accommodates the piston 50.
  • the cylinder 16 extends along the axial direction of the motor 30.
  • the radial direction of the motor 30 as compared with the configuration in which the cylinder 16 extends along the radial direction of the motor 30 (the direction orthogonal to the axis L1 of the motor 30) as described in the background art.
  • the size of the electric air pump 10 can be reduced.
  • the cylinder 16 is disposed adjacent to the motor housing portion 14 on the radially outer side. Specifically, in the housing 12, the cylinder 16 and the motor housing portion 14 are arranged side by side in the radial direction (second direction) of the motor 30. For this reason, the cylinder 16 can be disposed by utilizing the space on the outer side in the radial direction of the motor 30. Thereby, the physique of the electric air pump 10 in the axial direction of the motor 30 can be reduced as compared with the case where the cylinder 16 is disposed on the other side in the first direction with respect to the crank / circuit housing portion 18.
  • the axis L3 of the crank 40 and the axis L2 of the cylinder 16 are offset in the second direction. Accordingly, when the piston 50 is moved from the top dead center to the bottom dead center by the rod 46, the piston 50 can be efficiently pushed out by the rod 46. That is, when the piston 50 moves from the top dead center to the bottom dead center, one end portion of the rod 46 rotates around the axis of the shaft portion 20A, so that the rod 46 is connected to its other end portion (connection to the piston 50). (Refer to arrows H1 and H2 in FIG. 2).
  • the piston 50 is moved forward as compared with the comparative example in which the axis L3 of the crank 40 and the axis L2 of the cylinder 16 coincide.
  • the swing angle of the rod 46 can be reduced.
  • the rod 46 can be moved along the axis L2 of the cylinder 16. Accordingly, when the piston 50 is moved from the top dead center to the bottom dead center by the rod 46, the piston 50 can be efficiently pushed out by the rod 46.
  • the axis L ⁇ b> 3 of the crank 40 is disposed between the axis L ⁇ b> 2 of the cylinder 16 and the axis L ⁇ b> 1 of the motor 30 when viewed from the axial direction (vertical direction) of the worm wheel 42.
  • the electric air pump in the radial direction of the motor 30 is compared with the case where the axis L3 of the crank 40 is disposed on the opposite side (the other side in the second direction) of the motor 30 with respect to the axis L2 of the cylinder 16.
  • Ten physiques can be further reduced in size.
  • one end side of the rod 46 is arranged on the upper side of the worm wheel 42, and the circuit board 82 is arranged on the other side in the axial direction of the worm wheel 42.
  • the crank 40 and the circuit board 82 can be arranged side by side in the axial direction of the worm wheel 42.
  • the physique of the electric air pump 10 in the axial direction of the worm wheel 42 can be reduced in size.
  • the motor 30 constituting a part of the electric air pump 10 includes a yoke housing 30D around which a magnetic material is wound around a portion corresponding to the magnet 30C. For this reason, it is possible to reduce the thickness of a portion that hardly contributes to the magnetic field (a portion in which the brush holder is accommodated as an example) in the yoke housing 30D. Thereby, the motor 30 can be reduced in size, and the electric air pump 10 including the motor 30 can be reduced in size.
  • the middle portion in the longitudinal direction of the rod 46 is bent in a substantially crank shape on the lower side (that is, on the circuit housing portion 18 ⁇ / b> B side) at the radially outer position of the worm wheel 42.
  • the portion of the rod 46 that faces the worm wheel 42 is in the rotational radial direction of the worm wheel 42 as viewed from the outside in the rotational radial direction of the worm wheel 42. It is straight and extends parallel to the surface of the worm wheel 42.
  • the piston 50 is disposed so as to straddle in the vertical direction from the crank housing portion 18A to the circuit housing portion 18B.
  • the axis L2 of the cylinder 16 and the axis L1 of the motor 30 are set in parallel.
  • the axis L2 of the cylinder 16 is slightly different from the axis L1 of the motor 30 when viewed from above and below. It may be tilted. That is, the “cylinder extended along the axial direction of the motor” in the present disclosure includes a case where the cylinder extends in a direction inclined with respect to the axial direction of the motor. Even in this case, the physique of the electric air pump 10 in the radial direction of the motor 30 is smaller than the configuration in which the cylinder 16 extends along the radial direction of the motor 30 (direction orthogonal to the axial direction). Can be
  • the motor housing portion 14 and the cylinder 16 are set to be adjacent to each other, but the crank 40 is disposed between the motor housing portion 14 and the cylinder 16 in the longitudinal direction when viewed from the vertical direction. You may arrange. In this case, the size of the electric air pump 10 in the radial direction of the motor can be reduced as compared with the configuration in which the cylinder 16 extends along the radial direction of the motor 30 (direction orthogonal to the axial direction). it can.
  • the rotation shaft 30B of the motor 30 is rotated to one side in the rotation direction, so that the piston 50 reciprocates between the top dead center and the bottom dead center.
  • the piston 50 may be reciprocated between the top dead center and the bottom dead center by rotating the rotating shaft 30B of the motor 30 forward and backward by the drive circuit 80.
  • the check valve 60 is opened by pushing the stopper shaft 66B by the head of the screw 56 provided on the one side in the first direction of the piston 50.
  • the check valve 60 is configured to open when the piston 50 moves forward and the pressure inside the cylinder 16 (the space formed by the cylinder 16 and the piston 50) exceeds a certain level. Also good.
  • the urging force of the stopper spring 68 is set so that the check valve 60 is opened when the pressure inside the cylinder 16 exceeds a certain level.
  • the connecting portion 62B does not need to be coaxial with the axis L2 of the cylinder 16.
  • the connecting portion 62B may be on the radially outer side of the cylinder 16 (a direction orthogonal to the axis L2 of the cylinder 16).
  • the circuit board 82 (circuit housing portion 18B) is arranged so as to overlap the cylinder 16 in the vertical direction (the axial direction of the worm wheel 42). It has become.
  • the circuit board 82 may be arranged so as not to overlap the cylinder 16 in the vertical direction. In this case, the size of the electric air pump 10 in the vertical direction can be reduced as compared with the configuration in which the circuit board 82 overlaps the cylinder 16 in the vertical direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne une pompe à air électrique comprenant : (1) un moteur électrique comprenant une vis sans fin disposée sur un arbre rotatif ; (2) une manivelle conçue pour comprendre une roue à vis sans fin engrenée avec la vis sans fin et une tige reliée de façon rotative à une extrémité à la roue à vis sans fin ; et (3) un piston logé dans un cylindre s'étendant le long de la direction axiale du moteur électrique et relié à l'autre extrémité de la tige. Le piston se déplace en va-et-vient dans la direction d'extension du cylindre sous l'action de la manivelle, et par déplacement vers une extrémité du cylindre, amène l'air qui se trouve à l'intérieur du cylindre à être injecté par une soupape disposée à une extrémité du cylindre.
PCT/JP2016/084007 2015-11-19 2016-11-16 Pompe à air électrique WO2017086359A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680067928.9A CN108431416B (zh) 2015-11-19 2016-11-16 电动气泵
US15/776,789 US10788027B2 (en) 2015-11-19 2016-11-16 Electric air pump
DE112016005334.7T DE112016005334B4 (de) 2015-11-19 2016-11-16 Elektrische Luftpumpe

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-226909 2015-11-19
JP2015226909 2015-11-19
JP2016146537A JP6772618B2 (ja) 2015-11-19 2016-07-26 電動エアポンプ
JP2016-146537 2016-07-26

Publications (1)

Publication Number Publication Date
WO2017086359A1 true WO2017086359A1 (fr) 2017-05-26

Family

ID=58719027

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/084007 WO2017086359A1 (fr) 2015-11-19 2016-11-16 Pompe à air électrique

Country Status (1)

Country Link
WO (1) WO2017086359A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110067732A (zh) * 2019-05-21 2019-07-30 惠州市通晟智能科技有限公司 手持式电动气泵

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002138955A (ja) * 2000-11-06 2002-05-17 Techno Excel Co Ltd トラバース機構駆動式流体ポンプ
JP3101177U (ja) * 2003-10-22 2004-06-03 漢弓股▲ふん▼有限公司 小型空気圧縮機の構造
JP2005090466A (ja) * 2003-09-19 2005-04-07 Toshiba Corp コンプレッサの駆動装置及びそれを用いた冷蔵庫
JP2007237863A (ja) * 2006-03-07 2007-09-20 Asmo Co Ltd ワイパモータ
JP2009288763A (ja) * 2008-04-30 2009-12-10 Ricoh Co Ltd エア吐出装置及び画像形成装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002138955A (ja) * 2000-11-06 2002-05-17 Techno Excel Co Ltd トラバース機構駆動式流体ポンプ
JP2005090466A (ja) * 2003-09-19 2005-04-07 Toshiba Corp コンプレッサの駆動装置及びそれを用いた冷蔵庫
JP3101177U (ja) * 2003-10-22 2004-06-03 漢弓股▲ふん▼有限公司 小型空気圧縮機の構造
JP2007237863A (ja) * 2006-03-07 2007-09-20 Asmo Co Ltd ワイパモータ
JP2009288763A (ja) * 2008-04-30 2009-12-10 Ricoh Co Ltd エア吐出装置及び画像形成装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110067732A (zh) * 2019-05-21 2019-07-30 惠州市通晟智能科技有限公司 手持式电动气泵
CN110067732B (zh) * 2019-05-21 2024-05-17 惠州市通晟智能科技有限公司 手持式电动气泵

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