WO2014125740A1 - 流量制御装置 - Google Patents

流量制御装置 Download PDF

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Publication number
WO2014125740A1
WO2014125740A1 PCT/JP2013/084496 JP2013084496W WO2014125740A1 WO 2014125740 A1 WO2014125740 A1 WO 2014125740A1 JP 2013084496 W JP2013084496 W JP 2013084496W WO 2014125740 A1 WO2014125740 A1 WO 2014125740A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
stator
hole
control device
guide hole
Prior art date
Application number
PCT/JP2013/084496
Other languages
English (en)
French (fr)
Inventor
大地 稲垣
紳一郎 森田
Original Assignee
株式会社ケーヒン
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
Application filed by 株式会社ケーヒン filed Critical 株式会社ケーヒン
Priority to BR112015018505-3A priority Critical patent/BR112015018505B1/pt
Priority to EP13875314.0A priority patent/EP2957747B1/en
Priority to CN201380072922.7A priority patent/CN104995385B/zh
Publication of WO2014125740A1 publication Critical patent/WO2014125740A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/1055—Details of the valve housing having a fluid by-pass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12443—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue having the tongue substantially in the middle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12449—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being asymmetric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/107—Manufacturing or mounting details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1075—Materials, e.g. composites
    • F02D9/108—Plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/12—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/32—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/10—Welded housings
    • F16K27/105—Welded housings for gate valves

Definitions

  • a valve guide hole is formed in the control base, and a metering hole that opens on an inner surface of the valve guide hole and allows fluid to pass through the valve guide hole.
  • the valve guide hole includes the metering hole.
  • a control valve to be opened and closed is fitted, an output shaft of an actuator is connected to the control valve to open and close it, and a stator of the actuator is attached to the control base so as to be connected to the valve guide hole.
  • the present invention relates to an improvement of a flow rate control device that is fitted to the.
  • the joint structure of the control base and the actuator is composed of a housing that holds the actuator, a mounting plate that is locked to the end of the housing, and a bolt that secures the mounting plate to the control base. Therefore, the number of parts and assembly man-hours are large, and it is difficult to reduce the cost.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide the flow rate control device including a control base and an actuator joint structure with a small number of parts, a simple structure, and an inexpensive structure.
  • the present invention provides a valve guide hole formed in a control base, and a metering hole that opens on an inner surface of the valve guide hole and allows fluid to pass through the valve guide hole.
  • a control valve that opens and closes the metering hole is fitted in the hole, and an output shaft of an actuator is connected to the control valve so as to open and close it.
  • the stator of the actuator is connected to the control base and the valve guide hole.
  • the control base is provided with the first joint flange made of synthetic resin extending in the direction orthogonal to the axial direction of the mounting hole, while the stator of the actuator
  • a synthetic resin second joining flange is provided opposite the first joining flange, and is welded to one of the opposing surfaces of the first and second joining flanges.
  • the other part is provided with a welding convex part to be inserted into the welding concave part, and between the bottom part of the welding concave part and the tip part of the welding convex part, the periphery of the bottom part and the tip part is provided.
  • Welding regulation that arranges heating wires to be welded to each other, and abuts each other and keeps the prescribed value when the welding amount of the bottom part and the tip part reaches a prescribed value on the first and second joining flanges
  • the first feature is that the portion is provided.
  • the actuator corresponds to the electric motor 20 in the embodiment of the present invention described later, and the welding recess and the welding projection correspond to the welding groove 39 and the welding projection 40 in the embodiment.
  • a step portion facing the end surface of the stator is formed between the mounting hole and the valve guide hole, and between the step portion and the end surface of the stator.
  • a second feature is that a seal member is interposed, and the seal member is clamped in the axial direction by the stepped portion and the stator when the first and second joining flanges are welded.
  • the present invention has a third feature in that the welding concave portion and the welding convex portion are formed in an annular shape so as to surround the stator and the mounting hole.
  • control base is provided with the first joint flange made of synthetic resin extending in the direction perpendicular to the axial direction of the mounting hole, and the synthetic resin facing the first joint flange on the stator of the actuator.
  • a second weld flange made of metal, a weld recess on one of the opposing surfaces of the first and second weld flanges, and a weld projection inserted into the weld recess on the other, respectively, and the bottom of the weld recess
  • a heating wire for welding the bottom part and the periphery of the tip part to each other between the tip of the welding convex part, and without using a fixing member such as a mounting plate and a bolt,
  • the actuators can be joined together, and the joining structure can be simplified and the cost can be reduced.
  • first and second joint flanges are provided with a welding restricting portion that abuts against each other and holds the prescribed value when the amount of welding and sinking of the bottom portion and the tip portion reaches the prescribed value, the control base body and the actuator The relative position of the control valve can be made constant, and the open / close position of the control valve can be stabilized.
  • a step portion corresponding to the end surface of the stator is formed between the mounting hole and the valve guide hole, and a seal member is interposed between the step portion and the end surface of the stator. Since the seal member is clamped by the step portion and the stator when the first and second joining flanges are welded, the seal pressure of the seal member is made appropriate by the provision of the welding restricting portion. , The seal between the control base and the stator can be ensured, and foreign matter can be prevented from entering the actuator side from the valve guide hole.
  • the welding concave portion and the welding convex portion are formed in an annular shape so as to surround the stator and the mounting hole, the welding portion surrounds the mounting hole and the stator. Sealing between the mounting hole and the stator can be reliably performed.
  • FIG. 1 is a longitudinal side view of an intake air amount control apparatus for an engine according to an embodiment of the present invention.
  • FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.
  • First embodiment 3 is a cross-sectional view taken along the line 3-3 in FIG. 2. The right half shows the state before welding the first and second joining flanges, and the left half shows the state after welding the first and second joining flanges. is there.
  • (First embodiment) 4 is a cross-sectional view taken along line 4-4 of FIG. 2. The right half shows the state before welding of the first and second joining flanges, and the left half shows the state after welding of the first and second joining flanges. is there.
  • First embodiment 4 is a cross-sectional view taken along line 4-4 of FIG. 2. The right half shows the state before welding of the first and second joining flanges, and the left half shows the state after welding of the first and second joining flanges. is there.
  • reference numeral 1 denotes a throttle body that is attached to an engine for a motorcycle, for example, and has a suction passage 2 at the center thereof that communicates with an intake port of the engine.
  • a throttle valve 3 of the type is pivotally supported on the throttle body 1.
  • a support base 4 is integrally formed on the upper side wall of the throttle body 1, and a control base 5 is superimposed on the support base 4 and fastened by a bolt (not shown).
  • a bottomed cylindrical valve guide hole 7 is formed in the control base 5, and the valve guide hole 7 has a square cross section, and the inner side of the valve guide hole 7 on the lower side along the gravity direction is formed.
  • the side surface is the control inner surface 8a.
  • the control base 5 is provided with a metering hole 10 that opens to the control inner surface 8a, and an inlet hole 11 that opens to the control inner surface 8a on the bottom side of the valve guide hole 7 from the metering hole 10.
  • a control valve 12 that opens and closes 10 is slidably fitted in the valve guide hole 7.
  • a bypass upstream passage 14 connecting the intake passage 2 upstream from the throttle valve 3 to the inlet hole 11 and the metering hole 10 are connected to the intake passage 2 downstream from the throttle valve 3.
  • a bypass downstream passage 15 is provided.
  • seal members 16 surrounding the connecting portion between the bypass upstream passage 14 and the inlet hole 11 and the connecting portion between the bypass downstream passage 15 and the measuring hole 10, respectively. Be dressed.
  • the bypass upstream passage 14, the inlet hole 11, the valve guide hole 7, the metering hole 10 and the bypass downstream passage 15 constitute a bypass 17 that bypasses the throttle valve 3 and is connected to the intake passage 2.
  • the control valve 12 is erected from a control wall 12a slidably contacting the control inner side surface 8a of the valve guide hole 7 with the lower side surface as a control outer side surface 8b, and the valve guide hole 7 A pair of side walls 12b, 12b facing both the left and right inner side surfaces, and a front end wall 12c that stands up from the front end of the control wall 12a on the bottom side of the valve guide hole 7 and connects the front end portions of the side walls 12b, 12b.
  • control valve 12 is slidable in the axial direction in the valve guide hole 7 having a square cross section, but cannot rotate.
  • the control base 5 is provided with a motor mounting hole 19 having a diameter larger than that of the valve guide hole 7, which is connected to the opening end of the valve guide hole 7 via a step portion 18, and a stator 20 a of the electric motor 20 is mounted on the control base 5. .
  • a seal member 21 made of an elastic material such as rubber is sandwiched between the front end surface of the stator 20a and the step portion 18 and is in close contact with the outer peripheral surface of the output shaft 20b of the electric motor 20.
  • the output shaft 20b of the electric motor 20 can be rotated forward and backward, and the control valve 12 is connected to the output shaft 20b via a screw mechanism 25.
  • the screw mechanism 25 is connected to the control valve 12 via a detent means 26 and is connected to the slide piece 27 that synchronously opens and closes the control valve 12 and the output shaft 20 b of the electric motor 20.
  • the screw shaft 29 is screwed into a screw hole 28 provided along the sliding direction of the control valve 12.
  • the screw hole 28 is formed in a bag shape having a dead end portion 28a.
  • the slide piece 27 is formed on the outer periphery of a cylindrical shaft 27a that passes through the U-shaped inward flange 12d of the control valve 12 and is disposed in the control valve 12, and a closed end wall 27b at the front end of the cylindrical shaft 27a.
  • the cylindrical shaft 27a is provided with a bag-like screw hole 28 into which the screw shaft 29 is screwed.
  • a first spring seat 31 is formed on the inner surface of the outward flange 27c, and a second spring seat 32 is formed on the inner surface of the inward flange 12d.
  • the coil spring 33 is compressed between the spring seats 31 and 32, respectively. Due to the set load of the coil spring 33, the control valve 12 is urged backward, that is, toward the electric motor 20 with respect to the slide piece 27, so that the front end wall 12c of the slide piece 27 contacts the outward flange 27c. It is kept in contact. Thereby, the slide piece 27 and the control valve 12 are connected to each other without backlash in the axial direction.
  • the anti-rotation means 26 projects from the key groove 35 formed on the outer end surface of the closed end wall 27 b of the slide piece 27 and the inner end surface of the front end wall 12 c of the control valve 12 and engages with the key groove 35.
  • the key 36 and the engagement between the key groove 35 and the key 36 prevent relative rotation of the slide piece 27 and the control valve 12.
  • the fully open position of the rod control valve 12 at which the metering hole 10 is fully opened is regulated by the end of the screw shaft 29 abutting against the dead end portion 28 a of the screw hole 28 of the control valve 12.
  • the electronic control unit when the throttle valve 3 is fully closed, the electronic control unit performs an engine operation based on information on engine operating conditions such as throttle valve opening, engine intake negative pressure, intake air temperature, engine temperature, and engine speed.
  • engine operating conditions such as throttle valve opening, engine intake negative pressure, intake air temperature, engine temperature, and engine speed.
  • the energization to the electric motor 20 is controlled and the output of the electric motor 20 is controlled.
  • the shaft 20b is rotated forward or reverse. When the output shaft 20b rotates forward or backward, the rotation is transmitted to the control valve 12 through the slide piece 27 while being decelerated by the screw mechanism, so that the control valve 12 is displaced by the axial displacement.
  • the opening area of the measuring hole 10 to the valve guide hole 7 can be finely adjusted.
  • the intake air amount of the engine flowing through the bypass 17 is finely controlled, and it is possible to cope with engine start, fast idling, normal idling, engine braking, and the like.
  • the effective opening area is finely adjusted according to the sliding of the control valve 12. be able to.
  • control valve 12 is simultaneously subjected to a pressing force toward the control inner surface 8a due to gravity and a suction force due to the intake negative pressure of the engine acting on the control outer surface 8b of the control valve 12 from the measuring hole 10, By these, the contact
  • the slide piece 27 and the control valve 12 are connected in the axial direction without any backlash by the coil spring 33, and the control valve 12 can follow the axial movement of the slide piece 27 without delay.
  • the anti-rotation means 26 for connecting the slide piece 27 and the control valve 12 is constituted by a key groove 35 and a key 36 respectively formed on end surfaces facing the slide piece 27 and the control valve 12 in the axial direction. Since the biasing force of the coil spring 33 that connects the slide piece 27 and the control valve 12 is involved in the engagement, there is no increase in the number of parts due to the detent means 26, which contributes to the simplification of the structure of the intake air amount control device. obtain. In addition, the structure of the anti-rotation means 26 is compact, and an increase in the intake air amount control device can be avoided.
  • a first joint flange 35 extending in a direction orthogonal to the axial direction of the motor mounting hole 19 is integrally formed at the end of the control base 5 on the opening side of the motor mounting hole 19.
  • the first joint flange 35 is also made of synthetic resin.
  • the stator 20a of the electric motor 20 is integrally formed with a second joint flange 36 made of synthetic resin and integrated with the coupler 37 so as to face the first joint flange 35.
  • the coupler 37 includes an electric motor. Twenty power supply terminals 38 are provided.
  • An annular welding groove 39 surrounding the stator 20 a is provided on the end face of the first joining flange 35, and an annular welding protrusion 40 inserted into the welding groove 39 is provided on the end face of the second joining flange 36.
  • the first and second joint flanges 35 and 36 have a pair of ears 35a and 35a; 36a and 36a that protrude in the radial direction and face each other.
  • a pair of terminal grooves 41, 41 extending in the radial direction from the welding groove 39 is provided in 35a.
  • the ears 35a, 35a; 36a, 36a facing each other are provided with through holes 42, 43 that pass through them and are aligned in a straight line.
  • heating wires 44 formed in the corresponding shapes are disposed. That is, the heating wire 44 includes an annular portion 44a disposed in the annular welding groove 39 and a pair of terminal portions 44b and 44b extending linearly outward from the annular portion 44a in the radial direction.
  • the heating wire 44 is sandwiched between the groove bottom portion of the welding groove 39 and the tip portion of the welding protrusion 40, and melt-joins, that is, welds the groove bottom portion and the tip portion by heat generated by energization.
  • welding regulating portions 45 and 46 that can come into contact with each other are provided on the opposing surfaces on the outer peripheral side of the first and second joining flanges 35 and 36.
  • the seal member 21 is inserted into the motor mounting hole 19 of the control base 5 to the contact position with the step portion 18 and then the electric motor.
  • the stator 20 a is fitted into the motor mounting hole 19 while the output shaft 20 b and the screw shaft 29 of 20 are inserted into the center hole of the seal member 21, and the end surface thereof is brought into contact with the seal member 21.
  • the welding projection 40 of the second joining flange 36 of the electric motor 20 is inserted, A pair of insulating terminal receiving pins 48, 48 inserted into the pair of through holes 42, 42 and a pair of electrode rods 49, 49 inserted into the through holes 42, 42 from the pair of through holes 43, 43 are heating wires. 44 terminal parts 44b and 44b are clamped.
  • the heating wire 44 is energized through the pair of electrode rods 49 and 49 while applying pressure between the first and second joining flanges 35 and 36, the heat welding of the heating wire 44 causes the welding to be brought into pressure contact with the heating wire 44.
  • the first and second joining flanges 35 , 36 are brought into contact with each other, so that subsidence exceeding a specified value is restricted and energization to the heating wire 44 is stopped at the same time. Thereafter, the pressing force is released from the first and second joining flanges 35 and 36 after the welded portion is solidified.
  • control base 5 and the electric motor can be joined without using a fixing member such as a mounting plate or a bolt, and the joining structure can be simplified and the cost can be reduced.
  • welding regulating portions 45 and 46 of the first and second joining flanges 35 and 36 since the amount of welding sinking at the groove bottom and tip ends is regulated by the welding regulating portions 45 and 46 of the first and second joining flanges 35 and 36, the welding of the control base 5 and the electric motor 20 is performed after welding.
  • the relative position can be kept constant, and the open / close position of the control valve 12 can be stabilized.
  • the subsidence causes a pressure on the seal member 21 of the stator 20a, thereby ensuring a proper seal pressure of the seal member 21 and ensuring a seal between the control base 5 and the stator 20a.
  • Intrusion of foreign matter for example, soot and fuel components generated when the engine blows back
  • the valve guide hole 7 to the electric motor 20 side can be prevented.
  • the welding groove 39 and the welding projection 40 are formed in an annular shape so that they surround the opening ends of the stator 20a and the motor mounting hole 19, so that the welding portion surrounds the opening ends of the stator 20a and the motor mounting hole 19. As a result, the seal between the motor mounting hole 19 and the stator 20a can be reliably performed.
  • the welding restricting portions 45 and 46 are provided on the opposing surfaces on the outer peripheral side of the first and second joining flanges 35 and 36, the outer peripheral sides of the first and second joining flanges 35 and 36 are opposed to each other after welding. Since the surface exhibits a close contact state without a gap, a good appearance can be obtained.
  • the present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention.
  • the welding groove 39 can be provided on the second joining flange 36 and the welding projection 40 can be provided on the first joining flange 35.

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Abstract

流量制御装置において、制御基体（５）に取り付け孔（１９）の軸方向と直交する方向に延びる合成樹脂製の第１接合フランジ（３５）を設ける一方，アクチュエータ（２０）のステータ（２０ａ）に第１接合フランジ（３５）と対向する合成樹脂製の第２接合フランジ（３６）を設け，第１及び第２接合フランジ（３５，３６）の対向面の一方には溶着凹部（３９）を，またその他方には，溶着凹部（３９）に挿入される溶着凸部（４０）をそれぞれ設け，溶着凹部（３９）の底部と，溶着凸部（４０）の先端部との間に，それら底部及び先端部の周辺を相互に溶着させる電熱線（４４）を配設し，第１及び第２接合フランジ（３５，３６）に，底部及び先端部の溶着沈み量が規定値に達したとき，互いに当接して該規定値を保持する溶着規制部（４５，４６）を設けた。これにより部品点数が少なく構造が簡単で安価な制御基体及びアクチュエータの接合構造を備える装置を提供する。

Description

流量制御装置
　本発明は，制御基体にバルブガイド孔と，このバルブガイド孔の内側面に開口し，前記バルブガイド孔を通して流体が通過する計量孔とを形成し，前記バルブガイド孔には，前記計量孔を開閉する制御バルブを嵌装し，この制御バルブに，これを開閉駆動すべくアクチュエータの出力軸を連結し，前記アクチュエータのステータを，前記制御基体に前記バルブガイド孔に連なるように設けられる取り付け孔に嵌装してなる流量制御装置の改良に関する。
　かゝる流量制御装置は，下記特許文献１に開示されるように既に知られている。
国際特許出願公開ＷＯ２００５／０９５７７４号公報
　従来の流量制御装置では，制御基体及びアクチュエータの接合構造が，アクチュエータを保持するハウジングと，このハウジングの端部に係止される取り付け板と，この取り付け板を制御基体に固着するボルトとで構成されるので，その部品点数及び組立工数が多く，コストの低減が困難であった。
　本発明は，かゝる事情に鑑みてなされたもので，部品点数が少なく構造が簡単で安価な制御基体及びアクチュエータの接合構造を備える前記流量制御装置を提供することを目的とする。
　上記目的を達成するために，本発明は，制御基体にバルブガイド孔と，このバルブガイド孔の内側面に開口し，前記バルブガイド孔を通して流体が通過する計量孔とを形成し，前記バルブガイド孔には，前記計量孔を開閉する制御バルブを嵌装し，この制御バルブに，これを開閉駆動すべくアクチュエータの出力軸を連結し，前記アクチュエータのステータを，前記制御基体に前記バルブガイド孔に連なるように設けられる取り付け孔に嵌装してなる流量制御装置において，制御基体に前記取り付け孔の軸方向と直交する方向に延びる合成樹脂製の第１接合フランジを設ける一方，アクチュエータのステータに前記第１接合フランジと対向する合成樹脂製の第２接合フランジを設け，前記第１及び第２接合フランジの対向面の一方には溶着凹部を，またその他方には，前記溶着凹部に挿入される溶着凸部をそれぞれ設け，前記溶着凹部の底部と，前記溶着凸部の先端部との間に，それら底部及び先端部の周辺を相互に溶着させる電熱線を配設し，前記第１及び第２接合フランジに，前記底部及び先端部の溶着沈み量が規定値に達したとき，互いに当接して該規定値を保持する溶着規制部を設けたことを第１の特徴とする。尚，前記アクチュエータは，後述する本発明の実施形態中の電動モータ２０に対応し，また前記溶着凹部及び溶着凸部は，同実施形態中の溶着溝３９及び溶着突起４０に装置対応する。
  また本発明は，第１の特徴に加えて，前記取り付け孔及びバルブガイド孔間に，前記ステータの端面に対向する段部が形成されており，この段部と前記ステータの端面との間にシール部材を介装し，このシール部材が前記第１及び第２接合フランジの溶着時，前記段部及びステータにより前記軸方向に挟圧されるようにしたことを第２の特徴とする。
  さらに本発明は，第１の特徴に加えて，前記溶着凹部及び溶着凸部を，これらが前記ステータ及び取り付け孔を囲繞するよう，環状に形成したことを第３の特徴とする。
  本発明の第１の特徴によれば，制御基体に取り付け孔の軸方向と直交する方向に延びる合成樹脂製の第１接合フランジを設ける一方，アクチュエータのステータに第１接合フランジと対向する合成樹脂製の第２接合フランジを設け，第１及び第２接合フランジの対向面の一方には溶着凹部を，またその他方には，溶着凹部に挿入される溶着凸部をそれぞれ設け，溶着凹部の底部と，溶着凸部の先端部との間に，それら底部及び先端部の周辺を相互に溶着させる電熱線を配設したので，取り付け板及びボルト等の固着部材を使用することなく，制御基体及びアクチュエータ間を接合することができ，その接合構造の簡素化，延いてはコストの低減を図ることができる。
  しかも，第１及び第２接合フランジに，前記底部及び先端部の溶着沈み量が規定値に達したとき，互いに当接して該規定値を保持する溶着規制部を設けたので，制御基体及びアクチュエータの相対位置を一定させ，制御バルブの開閉位置を安定させることができる。
  本発明の第２の特徴によれば，取り付け孔及びバルブガイド孔間に，ステータの端面に対応する段部が形成されており，この段部とステータの端面との間にシール部材を介装し，このシール部材が第１及び第２接合フランジの溶着時，段部及びステータにより挟圧されるようにしたので，前記溶着規制部を設けたことゝ相まって，シール部材のシール圧を適正にし，制御基体及びステータ間のシールを確実にして，バルブガイド孔からアクチュエータ側への異物の浸入を防ぐことができる。
  本発明の第３の特徴によれば，溶着凹部及び溶着凸部を，これらがステータ及び取り付け孔を囲繞するよう，環状に形成したので，溶着部が取り付け孔及びステータを囲繞することになり，取り付け孔及びステータ間のシールを確実に行うことができる。
図１は本発明の実施形態に係るエンジンの吸気量制御装置の縦断側面図である。（第１の実施の形態） 図２は図１の２－２線拡大断面図である。（第１の実施の形態） 図３は図２の３－３線断面図で，右半部は第１及び第２接合フランジの溶着前の状態，左半部は第１及び第２接合フランジの溶着後の状態示すものである。（第１の実施の形態） 図４は図２の４－４線断面図で，右半部は第１及び第２接合フランジの溶着前の状態，左半部は第１及び第２接合フランジの溶着後の状態示すものである。（第１の実施の形態）
５・・・・・制御基体
７・・・・・バルブガイド孔
１０・・・・計量孔
１２・・・・制御バルブ
１８・・・・段部
１９・・・・取り付け孔
２０・・・・アクチュエータ（電動モータ）
２０ａ・・・ステータ
２０ｂ・・・出力軸
２１・・・・シール部材
３５・・・・第１接合フランジ
３６・・・・第２接合フランジ
３９・・・・溶着凹部（溶着溝）
４０・・・・溶着凸部（溶着突起）
４４・・・・電熱線
４５，４６・・・溶着規制部
　本発明をエンジンの吸気量制御装置に適用した実施形態を，添付図面に基づいて以下に説明する。
第１の実施の形態
　先ず，図１において，符号１は，例えば自動二輪車用のエンジンに取り付けられるスロットルボディであって，エンジンの吸気ポートに連通する吸気道２を中心部に有し，その吸気道２を開閉するバタフライ型のスロットルバルブ３がスロットルボディ１に軸支される。スロットルボディ１の上側壁には支持台４が一体に形成され，この支持台４上に制御基体５が重ねられ，図示しないボルトにより締結される。
  制御基体５には，有底シリンダ状のバルブガイド孔７が形成され，このバルブガイド孔７は，横断面が方形をなしており，このバルブガイド孔７の，重力方向に沿う下側の内側面は制御内側面８ａとされる。制御基体５には，上記制御内側面８ａに開口する計量孔１０と，この計量孔１０よりバルブガイド孔７の底部側で制御内側面８ａに開口する入口孔１１とが設けられ，上記計量孔１０を開閉する制御バルブ１２がバルブガイド孔７に摺動自在に嵌装される。
  一方，スロットルボディ１には，スロットルバルブ３より上流の吸気道２を前記入口孔１１に接続するバイパス上流通路１４と，前記計量孔１０を，スロットルバルブ３より下流の吸気道２に接続するバイパス下流通路１５とが設けられる。スロットルボディ１及び制御基体５の接合面間には，バイパス上流通路１４及び入口孔１１間の接続部，並びにバイパス下流通路１５及び計量孔１０間の接続部をそれぞれ囲繞するシール部材１６が介装される。而して，バイパス上流通路１４，入口孔１１，バルブガイド孔７，計量孔１０及びバイパス下流通路１５は，スロットルバルブ３を迂回して吸気道２に接続されるバイパス１７を構成する。
　前記制御バルブ１２は，下側面を制御外側面８ｂとして前記バルブガイド孔７の制御内側面８ａに摺接させる制御壁１２ａと，この制御壁１２ａの左右両側端部より起立してバルブガイド孔７の左右両内側面に対面する一対の側壁１２ｂ，１２ｂと，制御壁１２ａの，バルブガイド孔７の底部側の前端より起立して両側壁１２ｂ，１２ｂの前端部間を連結する前端壁１２ｃと，制御壁１２ａ及び両側壁１２ａ，１２ａの後端部から内方に突出するＵ字状の内向き鍔１２ｄとよりなっていて，制御壁１２ａと反対側の面を開放面１２ｅとした箱形をなしており，したがってこの制御バルブ１２は，横断面正方形のバルブガイド孔７内では，その軸方向に摺動自在であるが，回転は不能である。
  制御基体５には，前記バルブガイド孔７の開口端に段部１８を介して連なる，バルブガイド孔７より大径のモータ取り付け孔１９が設けられ，それに電動モータ２０のステータ２０ａが装着される。その際，ステータ２０ａの前端面と段部１８との間には，電動モータ２０の出力軸２０ｂの外周面に密接する，ゴム等の弾性材よりなるシール部材２１が挟持される。電動モータ２０の出力軸２０ｂは，正逆転が可能であり，この出力軸２０ｂに前記制御バルブ１２がねじ機構２５を介して連結される。
  上記ねじ機構２５は，制御バルブ１２に回り止め手段２６を介し連結されて制御バルブ１２を同期的に開閉駆動するスライドピース２７と，電動モータ２０の出力軸２０ｂに連設され，スライドピース２７に制御バルブ１２の摺動方向に沿って設けられたねじ孔２８に螺合するねじ軸２９とで構成される。上記ねじ孔２８は，行き止まり部２８ａを有する袋状に形成される。スライドピース２７は，制御バルブ１２のＵ字状の内向き鍔１２ｄ内を貫通して制御バルブ１２内に配置される筒軸２７ａと，この筒軸２７ａ前端の閉鎖端壁２７ｂの外周に形成されるフランジ２７ｃとよりなっており，筒軸２７ａには，前記ねじ軸２９が螺合する袋状の前記ねじ孔２８が設けられる。
  前記外向きフランジ２７ｃの内面には第１スプリング座３１が，また前記内向き鍔１２ｄの内面には第２スプリング座３２がそれぞれ形成され，この両スプリング座３１，３２間にコイルスプリング３３が縮設され，このコイルスプリング３３のセット荷重により制御バルブ１２はスライドピース２７に対して後方，即ち電動モータ２０側へ付勢され，それによりスライドピース２７の前端壁１２ｃが外向きフランジ２７ｃとの当接状態に保持される。これにより，スライドピース２７及び制御バルブ１２は，互いに軸方向にガタ無く連結される。
　前記回り止め手段２６は，スライドピース２７の閉鎖端壁２７ｂの外端面に形成されるキー溝３５と，制御バルブ１２の前端壁１２ｃの内端面に突設されて上記キー溝３５に係合するキー３６とより構成され，これらキー溝３５及びキー３６の係合により，スライドピース２７及び制御バルブ１２の相対回転が阻止されるようになっている。
  制御バルブ１２の，計量孔１０を全開にする全開位置は，ねじ軸２９の先端部が制御バルブ１２のねじ孔２８の行き止まり部２８ａに衝合することで規制されるようになっている。
  而して，スロットルバルブ３の全閉時には，電子制御ユニットが，スロットルバルブ開度，エンジンの吸気負圧，吸気温，エンジン温度，エンジン回転数等のエンジンの運転条件に関する情報に基づいて，エンジン始動時，ファストアイドリング時，通常アイドリング時，エンジンブレーキ時など，エンジンの運転条件に対応した制御バルブ１２の最適開度を得るべく，電動モータ２０への通電を制御して，電動モータ２０の出力軸２０ｂを正転又は逆転させる。出力軸２０ｂが正転又は逆転すると，その回転はねじ機構により減速されながらスライドピース２７を介して制御バルブ１２に軸方向の前後変位として伝達されるので，制御バルブ１２は，その軸方向変位により計量孔１０のバルブガイド孔７への開口面積をきめ細かく調節することができる。これにより，バイパス１７を流れるエンジンの吸気量がきめ細かく制御され，エンジン始動，ファストアイドリング，通常アイドリング，エンジンブレーキ等に対応することができる。
  制御バルブ１２により開閉される計量孔１０は，制御バルブ１２の摺動方向に長径を向けた長孔状をなしているから，その有効開口面積を制御バルブ１２の摺動に応じてきめ細かく調節することができる。
  この場合，制御バルブ１２には，重力による制御内側面８ａ側への押圧力と，計量孔１０から制御バルブ１２の制御外側面８ｂに働くエンジンの吸気負圧による吸引力とが同時に作用し，これらによって制御外側面８ｂ及び制御内側面８ａ間の密着力は強められる。
　スロットルバルブ３を開放していけば，その開度に応じた量の吸気が吸気道２を通してエンジンに供給され，エンジンは出力運転域に移っていく。
  またスライドピース２７及び制御バルブ１２は，コイルスプリング３３により軸方向にガタ無く連結され，制御バルブ１２はスライドピース２７の軸方向移動に遅れなく同期して追従することができる。
  しかも，スライドピース２７及び制御バルブ１２間を連結する回り止め手段２６は，スライドピース２７及び制御バルブ１２の軸方向で対向する端面にそれぞれ形成されるキー溝３５及びキー３６で構成され，これらの係合に，スライドピース２７及び制御バルブ１２間を連結するコイルスプリング３３の付勢力が関与するので，回り止め手段２６による部品点数の増加もなく，吸気量制御装置の構造の簡素化に寄与し得る。しかも，回り止め手段２６の構成はコンパクトで，吸気量制御装置の大型化を避けることができる。
  さて，制御基体５及び電動モータ２０の接合構造について，図１～図３により説明する。
  制御基体５の，モータ取り付け孔１９の開口側の端部には，モータ取り付け孔１９の軸方向と直交する方向に延びる第１接合フランジ３５が一体に形成される。図示例では，制御基体５が合成樹脂製であるから，第１接合フランジ３５も合成樹脂製となる。一方，電動モータ２０のステータ２０ａには，合成樹脂製でカプラ３７と一体の第２接合フランジ３６が上記第１接合フランジ３５と対向するように一体的に形成され，カプラ３７には，電動モータ２０の給電用端子３８が設けられる。第１接合フランジ３５の端面には，ステータ２０ａを囲繞する環状の溶着溝３９が，また第２接合フランジ３６の端面には，溶着溝３９に挿入される環状の溶着突起４０がそれぞれ設けられる。
  また第１及び第２接合フランジ３５，３６には，半径方向に突出して互いに対向する一対の耳部３５ａ，３５ａ；３６ａ，３６ａをそれぞれ有しており，第１接合フランジ３５の耳部３５ａ，３５ａには，溶着溝３９から半径方向に延びる一対の端子溝４１，４１が設けられる。さらに互いに対向する耳部３５ａ，３５ａ；３６ａ，３６ａには，それらを貫通して一直線上に並ぶ透孔４２，４３がそれぞれ設けられる。
  溶着溝３９及び端子溝４１，４１には，これらの対応した形状に形成される電熱線４４が配設される。即ち電熱線４４は，環状の溶着溝３９に配設される環状部４４ａと，この環状部４４ａから半径方向外方へ直線状に延びる一対の端子部４４ｂ，４４ｂとからなっている。この電熱線４４は，溶着溝３９の溝底部と溶着突起４０の先端部とで挟持され，通電による発熱により上記溝底部及び先端部を溶融接合，即ち溶着させるもので，その際の溶着沈み量を規制すべく，互いに当接し得る溶着規制部４５，４６が第１及び第２接合フランジ３５，３６の外周側の対向面に設けられる。
  而して，第１及び第２接合フランジ３５，３６の溶着に当たっては，先ず，制御基体５のモータ取り付け孔１９にシール部材２１を段部１８との当接位置まで嵌入してから，電動モータ２０の出力軸２０ｂ及びねじ軸２９をシール部材２１の中心孔に挿通しながら，ステータ２０ａをモータ取り付け孔１９に嵌装して，その端面をシール部材２１に接触させる。
  次いで，制御基体５の第１接合フランジ３５の溶着溝３９及び端子溝４１，４１に，電熱線４４を配設した上で，電動モータ２０の第２接合フランジ３６の溶着突起４０を嵌入し，一対の透孔４２，４２に挿入した絶縁性の一対の端子受けピン４８，４８と，一対の透孔４３，４３から透孔４２，４２に挿入した一対の電極棒４９，４９とで電熱線４４の端子部４４ｂ，４４ｂを挟持する。そして第１及び第２接合フランジ３５，３６相互に加圧力を加えつゝ，一対の電極導棒４９，４９を通して電熱線４４に通電すると，電熱線４４の発熱により，電熱線４４に圧接した溶着溝３９の溝底部と溶着突起４０の先端部とが溶着していき，それに伴なう溶着突起４０の溶着溝３９への沈み込みが規定値に達したとき，第１及び第２接合フランジ３５，３６の対向面に設けられた溶着規制部４５，４６が互いに当接することで，規定値を越える沈み込みが制限され，同時に電熱線４４への通電を停止する。その後，溶着部の固化を待って第１及び第２接合フランジ３５，３６から押圧力を解除する。
  かくして，取り付け板やボルト等の固着部材を使用することなく，制御基体５及び電動モータ間を接合することができ，その接合構造の簡素化，延いてはコストの低減を図ることができる。しかも，第１及び第２接合フランジ３５，３６の溶着規制部４５，４６により，前記溝底部及び先端部の溶着沈み量を規制するようにしたので，溶着後，制御基体５及び電動モータ２０の相対位置を一定させ，制御バルブ１２の開閉位置を安定させることができる。
  ところで，前記沈み込みは，ステータ２０ａのシール部材２１に対する押圧を生じさせるもので，これによりシール部材２１のシール圧を適正に確保し，制御基体５及びステータ２０ａ間のシールを確実にするので，バルブガイド孔７から電動モータ２０側への異物（例えばエンジンの吹き返し時に発生する煤や燃料成分）の浸入を防ぐことができる。
　また前記溶着溝３９及び溶着突起４０は，これらがステータ２０ａ及びモータ取り付け孔１９の開口端を囲繞するよう，環状に形成されるので，溶着部がステータ２０ａ及びモータ取り付け孔１９の開口端を囲繞することになり，モータ取り付け孔１９及びステータ２０ａ間のシールを確実に行うことができる。
　さらに前記溶着規制部４５，４６は，第１及び第２接合フランジ３５，３６の外周側の対向面に設けられるので，溶着後は，第１及び第２接合フランジ３５，３６の外周側の対向面は，隙間の無い密着状態を呈するから，良好な外観を得ることができる。
  本発明は上記実施形態に限定されるものではなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば，上記実施形態とは反対に，溶着溝３９を第２接合フランジ３６に，溶着突起４０を第１接合フランジ３５にそれぞれ設けることもできる。

Claims (3)

  1.   制御基体（５）にバルブガイド孔（７）と，このバルブガイド孔（７）の内側面に開口し，前記バルブガイド孔（７）を通して流体が通過する計量孔（１０）とを形成し，前記バルブガイド孔（７）には，前記計量孔（１０）を開閉する制御バルブ（１２）を嵌装し，この制御バルブ（１２）に，これを開閉駆動すべくアクチュエータ（２０）の出力軸（２０ｂ）を連結し，前記アクチュエータ（２０）のステータ（２０ａ）を，前記制御基体（５）に前記バルブガイド孔（７）に連なるように設けられる取り付け孔（１９）に嵌装してなる流量制御装置において，
      制御基体（５）に前記取り付け孔（１９）の軸方向と直交する方向に延びる合成樹脂製の第１接合フランジ（３５）を設ける一方，アクチュエータ（２０）のステータ（２０ａ）に前記第１接合フランジ（３５）と対向する合成樹脂製の第２接合フランジ（３６）を設け，前記第１及び第２接合フランジ（３５，３６）の対向面の一方には溶着凹部（３９）を，またその他方には，前記溶着凹部（３９）に挿入される溶着凸部（４０）をそれぞれ設け，前記溶着凹部（３９）の底部と，前記溶着凸部（４０）の先端部との間に，それら底部及び先端部の周辺を相互に溶着させる電熱線（４４）を配設し，前記第１及び第２接合フランジ（３５，３６）に，前記底部及び先端部の溶着沈み量が規定値に達したとき，互いに当接して該規定値を保持する溶着規制部（４５，４６）を設けたことを特徴とする流量制御装置。
  2. 　請求項１記載の流量制御装置において，
    　前記取り付け孔（１９）及びバルブガイド孔（７）間に，前記ステータ（２０ａ）の端面に対向する段部（１８）が形成されており，この段部と前記ステータ（２０ａ）の端面との間にシール部材（２１）を介装し，このシール部材（２１）が前記第１及び第２フランジ（３５，３６）の溶着時，前記段部（１８）及びステータ（２０ａ）により挟圧されるようにしたことを特徴とする流量制御装置。
  3. 　請求項１記載の流量制御装置において，
    　前記溶着凹部（３９）及び溶着凸部（４０）を，これらが前記ステータ（２０ａ）及び取り付け孔（１９）を囲繞するよう，環状に形成したことを特徴とする流量制御装置。
PCT/JP2013/084496 2013-02-14 2013-12-24 流量制御装置 WO2014125740A1 (ja)

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JP2014156797A (ja) 2014-08-28
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BR112015018505B1 (pt) 2021-10-13
BR112015018505A2 (pt) 2017-07-18

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