WO2016098188A1 - Rattrapeur de jeu mécanique et procédé de fabrication de rattrapeur de jeu mécanique - Google Patents

Rattrapeur de jeu mécanique et procédé de fabrication de rattrapeur de jeu mécanique Download PDF

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Publication number
WO2016098188A1
WO2016098188A1 PCT/JP2014/083340 JP2014083340W WO2016098188A1 WO 2016098188 A1 WO2016098188 A1 WO 2016098188A1 JP 2014083340 W JP2014083340 W JP 2014083340W WO 2016098188 A1 WO2016098188 A1 WO 2016098188A1
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WO
WIPO (PCT)
Prior art keywords
plunger
lash adjuster
peripheral surface
jig
mechanical lash
Prior art date
Application number
PCT/JP2014/083340
Other languages
English (en)
Japanese (ja)
Inventor
貴俊 木森
美千広 亀田
Original Assignee
日鍛バルブ株式会社
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
Application filed by 日鍛バルブ株式会社 filed Critical 日鍛バルブ株式会社
Priority to PCT/JP2014/083340 priority Critical patent/WO2016098188A1/fr
Publication of WO2016098188A1 publication Critical patent/WO2016098188A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups

Definitions

  • the present invention relates to a mechanical lash adjuster and a method for manufacturing the mechanical lash adjuster.
  • a rocker arm uses a lash adjuster as a fulcrum between a cam fixed to a camshaft that is driven to rotate in synchronization with the rotation of the engine and a valve stem of an intake valve (or an exhaust valve).
  • the driving force from the camshaft is transmitted to the valve stem via the cam and the rocker arm so as to open and close the intake valve (or the exhaust valve).
  • the lash adjuster automatically adjusts the valve clearance between the cam and the rocker arm by driving (extending and contracting operation).
  • a mechanical type is proposed in addition to a hydraulic type.
  • a mechanical ash adjuster has an outer peripheral surface of a plunger screwed into an inner peripheral surface of a cylindrical body having at least one end opened, and is attached between the body and the plunger.
  • a biasing means is interposed so as to bias the plunger in a direction extending with respect to the body.
  • the mechanical lash adjuster responds to the load state acting on the lash adjuster (plunger) via the rocker arm based on the screwed relationship between the inner peripheral surface of the body and the outer peripheral surface of the plunger and the urging force of the urging means. To extend or stop to expand or contract.
  • the biasing means is housed in the body and the plunger outer peripheral surface is screwed onto the inner peripheral surface of the body before use (before being incorporated into the valve mechanism).
  • the plunger must be brought into the body.
  • the plunger and the body are gripped in a relatively non-rotatable manner (gripping by hand in the case of an operator, gripping by a conveying means or gripping means in the case of an assembly device), and the plunger outer peripheral surface and the body inner peripheral surface are Under the screwed state, the body and the plunger are rotated relative to each other in the direction in which the plunger is shortened with respect to the body while resisting the biasing force of the biasing means. Must enter)).
  • the body and the plunger are formed in a substantially cylindrical shape, and it is difficult to accurately transmit the gripping force to the body and the plunger, while the plunger is screwed (entered) to the body.
  • the urging force of the urging means increases, and in order for the plunger to be further screwed into the body, the screwing force must overcome the urging force of the urging means that gradually increases. For this reason, it is not always easy to accurately assemble (manufacture) the body and the plunger not only in the case of manual work but also in the case of automation.
  • the present invention has been made in consideration of the above-described circumstances, and a first object thereof is a mechanical lash capable of assembling the plunger and the body as accurately and quickly as possible in automating the assembly. To provide an adjuster.
  • the second object is to provide a manufacturing method of a mechanical lash adjuster that can assemble the plunger and the body as accurately and quickly as possible in automating the assembly.
  • the outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger.
  • the urging means is interposed so as to urge the plunger in a direction extending with respect to the body.
  • the other for fitting one of them is formed so as to correspond to the fact that the rotation suppressing jig used at the time of assembling has either one of a projection or a recess showing a non-circular shape in plan view.
  • the plunger has a cross-sectional shape that is formed in a non-circular shape at the tip of the plunger. Preferred embodiments of claim 1 are as described in claims 2 to 6.
  • the outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger.
  • the biasing means is interposed so as to bias the plunger in a direction extending with respect to the body.
  • a rotation suppression jig provided with one of a protrusion or a recess showing a non-circular shape in plan view, and the body as the other end surface of the body, corresponding to one of the protrusion or the recess of the rotation suppression jig, Prepare one having the other for fitting one, a plunger having a non-circular cross-sectional shape at the tip of the plunger, and the biasing means.
  • the other end surface of the body is placed on one of the protrusions or recesses of the rotation suppression jig from the upper side of the rotation suppression jig by using a body transport tool,
  • a plunger conveying tool the plunger is conveyed so that the proximal end surface of the plunger enters the one end opening of the body in a state where the distal end portion of the plunger is gripped, and the base of the plunger is
  • the biasing means is housed in the body by the time when the end surface is conveyed so as to enter the one end opening of the body,
  • one of the plunger conveying tool or the rotation suppressing jig is rotated, and the protrusion or recess of the rotation suppressing jig is rotated.
  • the outer peripheral surface of the plunger and the inner peripheral surface of the body are rotated relative to each other in a state in which one of them is fitted to the other of the protrusion or the concave portion on the other end surface of the body.
  • the preferred embodiment of claim 7 is as described in claim 8 and the following.
  • the rotation suppressing jig used at the time of assembling has one of a protrusion or a recess showing a non-circular shape in plan view on the other end surface of the body. Since the other for fitting one of them is formed to correspond to that provided, the other end surface of the body is lowered onto one of the protrusion or recess of the rotation suppression jig and the rotation suppression treatment is performed.
  • One of the protrusions or recesses in the tool can be fitted into the other of the protrusions or recesses on the other end surface of the body, and the body can be made relatively unrotatable with respect to the rotation suppression jig.
  • the cross-sectional shape of the plunger is formed in a non-circular shape at the tip of the plunger, if the plunger transporter for transporting the plunger grips the tip of the plunger, the plunger The relative rotation between the transport tool and the plunger can be restricted.
  • the rotational force is It will be used accurately as a force to rotate the body relative to the body, and even if the biasing means is housed in the body, the plunger outer peripheral surface and the body inner peripheral surface are securely engaged with each other in a predetermined screwed state. can do. Therefore, when the assembly is automated, the plunger and the body can be assembled accurately based on the structure of the mechanical lash adjuster.
  • the body transport tool grips the body and transports it to the rotation restraining jig.
  • the body transport tool lowers the body onto the rotation restraining jig and the rotation restraining jig.
  • the body can be held in a self-supporting manner so as not to be relatively rotatable with respect to the rotation suppression jig. For this reason, not only can the plunger be immediately assembled to the opening of the self-supporting body, but also the body transporter that has transported the body can be immediately transferred to the next operation.
  • the assembly time (cycle time) required for one assembly of the body and plunger is shortened compared to using the body carrier (gripping the body). can do. Therefore, when the assembly is automated, the plunger and the body can be quickly assembled based on the structure of the mechanical lash adjuster.
  • both the transport of the body to the rotation restraining jig and the transport of the plunger to the body held by the rotation restraining jig should be a simple path that moves down after being moved above the rotation restraining jig. Therefore, it is possible to simplify the control of the conveyance device for the body and the conveyance device for the plunger. Therefore, in automating the assembly, the plunger and the body can be assembled accurately (reliably) from the above viewpoint based on the structure of the mechanical lash adjuster.
  • the protrusion is fitted on the other end surface of the body so as to correspond to the fact that the rotation suppressing jig used at the time of assembling has a protrusion showing a non-circular shape in plan view. Since the fitting recessed part for forming is formed, the specific aspect of the said Claim 1 can be provided.
  • the other end surface of the body has a flat surface except for the fitting recess
  • the bottom surface of the storage recess of the cylinder head that stores the mechanical lash adjuster is used.
  • the other end surface of the body can be brought into contact with a flat surface. Therefore, the mechanical lash adjuster can be stably disposed in the storage recess of the cylinder head, and the relative rotation of the mechanical lash adjuster with respect to the storage recess of the cylinder head can be suppressed as much as possible by obtaining a frictional force as much as possible. .
  • the fitting recess includes the plurality of standing uprights to correspond to the fact that the protrusions of the rotation suppressing jig extend radially while standing up the plurality of upstanding plate parts. Since it is formed as a plurality of fitting grooves that fit the plate part, the relative rotation of the body with respect to the rotation suppression jig can be reliably controlled by fitting the plurality of upright plate parts and the plurality of fitting grooves. In assembling the body and the plunger, the body and the plunger can be accurately rotated relative to each other.
  • the body has one end and the other end opened, and the plurality of fitting grooves are formed on the end surface of the peripheral edge that defines the other end opening of the body.
  • a plurality of fitting grooves a normal cylinder generally used as a body in a mechanical lash adjuster (both ends are open, but when used, a spring seat plate is attached to the other end of the body ) Easy to apply.
  • the opening is formed on the other end surface of the body and the plurality of fitting grooves are formed only on the end surface of the peripheral edge that defines the opening, the processing load of the fitting groove can be suppressed as much as possible.
  • the pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger.
  • the pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger,
  • the rotation suppression jig provided with one of a projection or a recess having a non-circular shape in plan view, and the rotation suppression jig on the other end surface of the body as the body.
  • the other for fitting one is formed, and as the plunger, the cross-sectional shape of the tip of the plunger is formed in a non-circular shape Prepared and the biasing means,
  • the other end surface of the body is placed on one of the protrusion or recess of the rotation suppression jig from the upper side of the rotation suppression jig by using a body transport tool, and then the plunger
  • the plunger is transported so that the proximal end portion of the plunger enters the one end opening of the body in a state where the distal end portion of the plunger is gripped, and the proximal end portion of the plunger is
  • the biasing means is housed in the body by the time it is transported so as to enter the one end opening of the body, and then the plunger transport is maintained while the plunger tip is held by the plunger transport tool.
  • the mechanical lash adjuster according to claim 1 can be manufactured (assembled) under automation. And body can be assembled as accurately and quickly as possible.
  • a rotation suppression jig having a non-circular projection in plan view is used, and as a body, fitting for fitting the projection to the other end surface of the body Since what uses a recessed part is used, the mechanical lash adjuster which concerns on the above-mentioned Claim 2 can be manufactured.
  • the mechanical lash adjuster according to the third aspect of the present invention can be manufactured by using a plurality of fitting grooves for fitting the plurality of standing plate portions corresponding to the standing plate portions.
  • the mechanical lash adjuster according to the above-described fourth aspect can be manufactured.
  • a plunger formed with a pair of gripping surfaces forming a flat surface facing each other in the radial direction of the plunger is used on the outer peripheral surface of the distal end portion of the plunger.
  • a bottomed cylinder capable of lowering the body from above into the rotation suppression jig, the bottom inner surface of the bottomed cylinder being Since a plurality of upright plate parts are used, when the body is lowered from the other end face side into the bottomed cylindrical rotation restraining jig, a plurality of fittings on the other end face of the body are assumed. Even if the plurality of upright plate portions of the rotation suppressing jig are not fitted into the groove and the other end surface of the body is placed on the plurality of upright plate portions, the base end surface of the plunger enters the one end opening of the body thereafter.
  • a snap ring that can be expanded and contracted is fitted on the outer periphery of the tip of the plunger, and the tip of the plunger tip is positioned more than the retaining ring.
  • the retaining ring is held by the plunger carrier as the plunger is gripped by the plunger carrier, and the plunger outer peripheral surface and the body inner peripheral surface are rotated relative to each other to move the plunger into the body.
  • the retaining ring is pushed into the peripheral edge of the body, and the retaining ring is held at the inner peripheral edge of the opening of the body. Therefore, the retaining ring is pushed into the peripheral edge of the body opening from the gripping state (posture) of the plunger tip.
  • the plunger conveying tool can be effectively used for holding the retaining ring on the inner peripheral surface of the opening of the body.
  • the work surface is constituted by the upper surface of the turntable, a plurality of rotation suppression jigs are prepared as the rotation suppression jig, and the plurality of rotation suppression jigs are connected to the upper surface of the turntable.
  • the turntable is fixed at a predetermined interval in the circumferential direction of the turntable, and the rotation control of the turntable shifts each rotation suppression jig to each assembling step in sequence. Assembling of the plunger and the box can be performed sequentially using a jig. For this reason, when mass production of the said mechanical lash adjuster is aimed at, a preferable manufacturing method can be provided.
  • the plunger outer peripheral surface and the body inner peripheral surface are relatively rotated to bring the plunger outer peripheral surface and the body inner peripheral surface into a predetermined screwed state
  • the plunger and the body are relatively rotated by applying a rotational force to the body by the rotation suppression jig.
  • the plunger and the body can be accurately rotated in a specific manner.
  • FIG. 1 is a longitudinal sectional view showing a valve operating mechanism in which a hydraulic lash adjuster according to a first embodiment is incorporated.
  • the perspective view which shows the hydraulic lash adjuster which concerns on 1st Embodiment.
  • the bottom view which shows the hydraulic lash adjuster which concerns on 1st Embodiment.
  • 1 is a longitudinal sectional view showing a hydraulic lash adjuster according to a first embodiment.
  • attachment Specifically, FIG. 5 (a) is a diagram showing the contents of attaching the spring seat plate to the other end in the axial direction of the cylindrical body with the C-ring, and FIG. 5 (b) is a view after the spring seat plate is attached.
  • FIG. 5 (c) is a figure which shows the body which the assembly preparation completed.
  • FIG. 6A is a diagram showing the contents of fitting a retaining ring on the outer peripheral surface of the distal end portion of the plunger
  • FIG. 6B is a diagram showing the plunger that has been prepared for assembly.
  • FIG. 10A is a diagram illustrating insertion of a body into the rotation suppression jig
  • FIG. 10B is a diagram illustrating a state in which the body is inserted into the rotation suppression jig.
  • 10 (c) is a diagram illustrating conveyance of the plunger with respect to the body inserted into the rotation suppression jig
  • FIG. 10 (d) is a relative rotation (screwing) of the plunger with respect to the body inserted into the rotation suppression jig.
  • FIG. 10E is a diagram showing that the plunger has reached a predetermined screwed state with respect to the body inserted into the rotation suppressing jig.
  • FIGS. 11 (a) to 11 (e) are views showing the relationship between the fitting groove and the upright plate portion in a state corresponding to FIGS. 10 (a) to 10 (e).
  • reference numeral 1 denotes a valve mechanism of an internal combustion engine.
  • the valve mechanism 1 is an intake or exhaust valve (hereinafter referred to as a valve) 2 for opening and closing an intake port (or exhaust port) 8 as a mechanism for opening and closing an intake port (or exhaust port) 8 connected to a combustion chamber.
  • a valve intake or exhaust valve
  • a cam 3 that is rotationally driven, a rocker arm 4 that is disposed between the valve 2 and the cam 3 and is rocked by the rotational driving force of the cam 3, and a mechanical lash adjuster 5 that supports the rocker arm 4 as a fulcrum. I have.
  • valve 2 is integrally provided with a valve stem 6, and the valve stem 6 is inserted into a through-hole 9 connected to an intake port (or exhaust port) 8 formed in a cylinder head 7 of the engine. It is slidably inserted.
  • a valve spring 10 is wound around the outer periphery of the valve stem 6 with a loose fit.
  • the valve spring 10 is mounted between a cylinder head 7 and a retainer 11 fixed to the upper portion of the valve stem 6. The valve 2 is urged in a direction to close the opening of the intake port (or exhaust port) 8.
  • the cam 3 is fixed to a camshaft 12 that is driven to rotate in synchronization with the rotation of the automobile engine, and the cam 3 is driven to rotate as the camshaft 12 rotates.
  • the rocker arm 4 transmits the rotational driving force of the cam 3 to the valve stem 6 by swinging based on the rotational drive of the cam 3, and the valve stem 6 responds to the swing of the rocker arm 4.
  • the through hole 9 is slid.
  • the valve 2 opens and closes the intake port (or exhaust port) 8 in accordance with the sliding of the valve stem 6.
  • the mechanical lash adjuster 5 has a structure in which a plunger 14 is slidably fitted in a body 13 as shown in FIG. 1 so as to support the rocker arm 4 as a fulcrum.
  • the body 13 is housed in a circular recess 15 formed on the upper side of the cylinder head 7 in plan view.
  • the body 13 is formed in a substantially cylindrical shape corresponding to the recess 15, and the body 13 has one end in the axial direction in a state in which one end in the axial direction slightly protrudes outward from the opening of the recess 15. The other end portion in the axial direction than the portion is accommodated in the recess 15.
  • the opening 13aa of one end surface (hereinafter referred to as one end surface) 13a in the body 13 opens to the outside of the recess 15 and the other end surface in the axial direction (hereinafter referred to as the other end surface) 13b of the body 13 is the bottom surface in the recess 15. Is supposed to face.
  • a plurality of fitting grooves 16 are formed on the other end surface 13b of the body 13 as shown in FIGS.
  • the plurality of fitting grooves 16 extend radially about the axis OB of the body 13, but as described above, the other end surface 13b of the body 13 has the opening 13ba.
  • the plurality of fitting grooves 16 do not exist in the opening 13ba, but exist only in the peripheral edge surface 13bb that defines the opening 13ba. Therefore, each fitting groove 16 has a groove extending direction in a thickness direction of the peripheral edge surface 13bb while a groove width direction is directed in a circumferential direction of the peripheral edge surface 13bb. More specifically, the plurality of fitting grooves 16 are formed as four fitting grooves 16. For this reason, each of the fitting grooves 16 is arranged at equal angles (90 degrees) in the circumferential direction of the peripheral edge surface 13bb of the body 13.
  • a female thread 17 is formed on the inner peripheral surface of the body 13 over the entire length in the axial direction.
  • the female screw 17 constitutes a screw engaging portion 19 (see FIG. 4) in cooperation with a male screw 18 in the plunger 14 described later.
  • holding grooves 20 and 21 are formed on the inner peripheral surface of the body 13 at the inner peripheral edge of the opening on the other end side in the axial direction and the inner peripheral edge of the opening on the one end side in the axial direction.
  • a so-called C-ring (C-shaped retaining ring) 22 is fitted in the holding groove 20 as an expandable / contractible stopper, and a spring is formed on the C-ring 22 (a portion protruding radially inward from the inner peripheral surface of the body 13).
  • the seat surface plate 23 is seated, and the other end side opening 13ba in the body 13 is slightly blocked on the inner side in the axial direction by the spring seat surface plate 23.
  • a retaining ring 24 (for example, a so-called C ring) that can be expanded and contracted is fitted in the holding groove 21 as a stopper, and the retaining ring 24 prevents the plunger 14 described later from coming off.
  • the plunger 14 As the plunger 14, a rod-like member is used as shown in FIGS.
  • the plunger 14 has a distal end portion 25 that is on one side in the axial direction, a cylindrical main body portion 26 that extends in a slightly larger diameter than the distal end portion 25 on the other axial side of the distal end portion 25, and
  • the plunger 14 protrudes outward from the opening 13aa of the one end surface 13a of the body 13 in a state where the main body portion 26 has entered the body 13.
  • the plunger 14 is formed with a step portion 27 between the outer peripheral surface of the tip portion 25 and the outer peripheral surface of the main body portion 26, and the step portion 27 accompanying the movement of the plunger 14 (movement of the body 13 in the axial direction).
  • the retaining ring 24 faces the moving region.
  • the distal end surface of the distal end portion 25 of the plunger 14 is formed so as to swell in a substantially hemispherical shape as shown in FIG.
  • the rocker arm 4 Corresponding to the substantially hemispherical tip surface of the plunger 14, the rocker arm 4 has a substantially hemispherical recess 28 formed on the contact surface with the plunger 14, and the inside and outside of the recess 28. And a communication passage 29 for communicating with each other, and the distal end portion 25 of the plunger 14 receives the concave portion 28 of the rocker arm 4 as a fulcrum of the rocker arm 4.
  • a pair of gripping surfaces 25 ⁇ / b> A is formed on the outer peripheral surface of the distal end portion 25 of the plunger 14.
  • the pair of gripping surfaces 25A are arranged so as to face each other in the radial direction of the plunger 14, and the distal end portion 25 portion is formed in a non-circular cross-sectional shape based on the pair of gripping surfaces 25A.
  • a male screw 18 is formed on the outer peripheral surface of the body portion 26 of the plunger 14 corresponding to the female screw 17 on the inner peripheral surface of the body 13.
  • the male screw 18 is formed over the entire length in the axial direction of the main body portion 26.
  • the male screw 18 and the female screw 17 on the inner peripheral surface of the body 13 slide and rotate to rotate in the axis OB direction of the body 13 (the axis of the plunger 14).
  • a screw engaging portion 19 for displacement movement in the OP direction) is to be configured.
  • a spring housing space 30 and a communication hole 31 are formed inside the main body 26 of the plunger 14.
  • the spring storage space 30 is formed in the main body portion 26 over substantially the entire length in the axial direction of the main body portion 26, and the spring storage space 30 is the base end surface 26 a of the main body portion 26 (the other side surface in the axial direction of the plunger 14).
  • To the spring seat plate 23 To the spring seat plate 23.
  • the communication hole 21 is formed inside the plunger tip 25 so as to allow the oil that has entered the body 13 to be discharged.
  • One end of the communication hole 21 is opened in the spring housing space 30 and the other end is formed.
  • An opening is formed in the recess 28 (communication path 29) of the rocker arm 4 from the distal end surface of the plunger distal end portion 25.
  • a plunger spring 32 is accommodated as shown in FIGS.
  • the plunger spring 32 is interposed between the inner bottom surface of the spring housing space 30 and the spring seat plate 23, and the plunger 14 is urged in the extending direction by the plunger spring 32. Yes.
  • the plunger 14 slides and rotates between the plunger 14 and the body 13 at the screw engaging portion 19 according to the load state of the rocker arm 4 with respect to the plunger 14. By doing so, it is extended or shortened.
  • the sum of the friction torque between the plunger tip portion 25 and the rocker arm 4 and the friction torque between the plunger 14 and the plunger spring 32 is a thrust torque that causes the screw engagement portion 19 to slide and rotate by a load acting on the plunger 14.
  • the sliding rotation of the screw engaging portion 19 is suppressed, so that the screw engaging portion 19 becomes immobile, and the plunger 14 functions as a rocking fulcrum of the rocker arm 4.
  • the valve clearance between the cam 3 and the rocker arm 4 is automatically adjusted by driving (extending / contracting) the mechanical lash adjuster 5 as described above.
  • such a mechanical lash adjuster 5 is assembled on the inner peripheral surface of the body 13 after the plunger spring 32 is accommodated in the body 13 before being used (before being assembled into the valve mechanism 1).
  • the male screw 18 on the outer peripheral surface of the plunger 14 is screwed into the female screw 17 so that the plunger 14 (main body portion 26) enters the body 13.
  • automation is achieved by using an assembling apparatus.
  • the body 13, the plunger 14, and further the rotation restraining jig 33 which are components of the mechanical lash adjuster 5 described above, are prepared prior to the assembly.
  • the body 13 has a spring seat surface plate 23 attached in advance using a C ring 22 at the inner peripheral edge of the opening on the other end side in the axial direction.
  • the opening 13ba of 13b is closed (see FIGS. 5B and 5C).
  • a plunger spring 32 is housed in the body 13 after the spring seat plate 23 is attached (see FIGS. 5B and 5C).
  • the plunger 14 is fitted with a retaining ring 24 in advance on the outer peripheral surface of the distal end portion 25 of the plunger 14, and the retaining ring 24 has a pair of gripping surfaces 25A. It is located on the main body part 26 side.
  • the rotation suppression jig 33 is formed with a bottomed cylindrical body integrally including a disc-shaped bottom portion 33 a and a cylindrical portion 33 b erected from the periphery of the bottom portion. .
  • the internal size of the rotation suppression jig 33 (bottomed cylindrical body) is such that the body 13 can be inserted through the opening, and the body 13 can rotate relative to the rotation suppression jig 33 in the inserted state. The state can be secured.
  • a plurality of upright plate portions 34 are provided on the inner surface of the bottom 33 a of the rotation suppressing jig 33 so as to correspond to the plurality of fitting grooves 16 on the peripheral edge surface 13 bb of the body 13.
  • Each of the standing plate portions 34 is arranged radially about the axis OJ of the rotation suppressing jig 33 with the plate surface of each rising plate portion 34 directed in the circumferential direction of the rotation suppressing jig 33.
  • the four upright plate portions 34 are arranged at equal angles (90 degrees) so as to correspond to the four fitting grooves 16 in the body 13 described above.
  • the wall thickness of each upright plate portion 34 is slightly shorter than the groove width of each fitting groove 16 on the peripheral end surface 13bb (the other end surface in the axial direction) of the body 13, and a plurality of upright plate portions 34 are provided.
  • the rotation suppression jig 33 is arranged on the turntable 35 at predetermined intervals in the circumferential direction, and the turntable It is preferable to move each rotation suppression jig 33 sequentially to each assembly step by moving 35 (rotation: the rotation direction is indicated by an arrow in FIG. 9).
  • the plunger 14 and the rotation suppression jig 33 are prepared, first, as shown in FIG. 10A, after fixing the bottom 33 a of the rotation suppression jig 33 on the work surface 37, The body 13 is inserted into the rotation suppression jig 33 from above.
  • FIG. 10A a body transport tool (FIG. 10A, FIG. 12 shows a pair of gripping claws) 36 that can be transported while gripping the body 13 is used.
  • FIG. 12 the body 13 is gripped and conveyed above the upper opening 13 a of the rotation suppressing jig 33, the body 13 is lowered from this state, and the body 13 is moved to the body 13. It inserts into the rotation suppression jig 33 from the other end side in the axis OB direction (see also FIG. 10B).
  • the plunger 14 has a base end surface 26 a side of the body 13 in the rotation suppression jig 33. It is conveyed so as to enter the one end face opening 13aa.
  • the plunger transport tool 38 includes a main body 39 that is attached to a robot arm or the like (not shown) and is movable in various directions. Is provided with a rotating portion 41 that is rotated by a motor 40. As shown by the arrows in FIG. 13, a pair of gripping claws 42 that can move toward and away from each other based on compressed air or the like are provided on the lower surface of the rotating portion 41. A hanging portion 43 that hangs down from the rotating portion 41, and a claw portion 44 that protrudes from the tip of the hanging portion 43 toward the counterpart member 42. Moreover, a pressing portion 45 for pressing the retaining ring 24 is provided on the lower surface of each claw portion 44 in a protruding state.
  • the plunger transport tool 38 grips the pair of gripping surfaces 25A of the plunger tip 25 with the tips of the claws 44 of the pair of gripping claws 42, and maintains the state of the plunger 14 while maintaining the base end surface 26a. It conveys so that the side may enter into one end opening of the body 13.
  • the pair of claws 44 grips the pair of gripping surfaces 25A of the plunger tip 25 in order to restrict the relative rotation between the pair of claws 44 and the plunger 14, and the gripping position of the pair of claws 44 depends on the plunger tip.
  • the retaining ring 24 comes to the distal end side of the plunger with respect to the retaining ring 24 fitted to the outer peripheral surface of the portion 25, and the retaining ring 24 faces the area below the pressing portion 45 of each claw portion 44.
  • the plunger 14 is rotated about its axis by the plunger conveying tool 38.
  • the rotation of the plunger 14 initially causes the plunger 14 and the body 13 to rotate together as shown in FIG.
  • the body 13 rotates relative to the rotation restraining jig 33 and each of the plurality of fitting grooves 16 on the peripheral edge surface 13bb of the body 13 faces each of the plurality of upright plate portions 34, FIG. 11 (e)
  • the plurality of upright plate portions 34 are fitted into the plurality of fitting grooves 16.
  • the rotation suppression jig 33 and the body 13 are in a state where relative rotation is impossible, and the plunger 14 and the body 13 (rotation suppression jig 33) rotate relative to each other by further rotation of the plunger 14.
  • the male screw 18 on the outer peripheral surface of the plunger 14 and the female screw 17 on the inner peripheral surface of the body 13 start to be screwed together, and the plunger 14 enters the body 13.
  • the plunger carrier 14 descends as the plunger 14 enters the body 13 based on the screwing of the outer circumferential surface of the plunger 14 and the inner circumferential surface of the body 13.
  • the retaining ring 24 fitted to the plunger tip 25 comes into contact with the opening end surface of the box 14.
  • the plunger 14 is about to be moved to the tip end side, but the pressing portions 45 of the pair of gripping claws 42 in the plunger carrier 38 push back the retaining ring 24, and based on this, the retaining ring 24 is
  • the diameter of the body 13 is once reduced by being guided to the inner peripheral edge of the opening, and then reaches the holding groove 21 at the inner peripheral edge of the opening to be expanded again. Accordingly, the retaining ring 24 is fitted and held in the retaining groove 21 of the body 13, and thereafter, the plunger 14 can expand and contract with respect to the body 13 in a range until the movement is restricted by the retaining ring 24.
  • the plunger transport tool 38 When the retaining ring 24 is fitted and held in the holding groove 21 of the body 13, the plunger transport tool 38 is lifted while maintaining the grip on the plunger 14, and the body 13 and the plunger 14 are assembled.
  • the mechanical lash adjuster 5 is pulled out from the rotation restraining jig 33. Then, the mechanical lash adjuster 5 is transported to the assembled finished product storage place by the plunger transport tool 38, and the series of assembly work of the plunger 14 and the body 13 is completed.
  • the plurality of upright plate portions 34 in the rotation suppression jig 33 are fitted into the fitting grooves 16 in the body 13 so that the rotation suppression jig 33 and the body 13 cannot be relatively rotated.
  • the pair of gripping claws 42 of the plunger tip portion 25 are gripped by the pair of gripping claws 42 of the plunger transport tool 38 so that the pair of gripping claws 42 and the plunger 14 are not relatively rotatable.
  • the rotation suppression jig 33 is formed of a bottomed cylindrical body, and if the body 13 is inserted into the rotation suppression jig 33 from the upper opening, the rotation suppression jig 33 holds the body 13 in a self-supporting manner ( As shown in FIGS. 10 (b) and 12) and FIG. 12, the assembly of the plunger 14 to the body 13 can be started immediately, while the body transport tool 36 is immediately moved to the next operation. Can do. For this reason, as compared with the case where the plunger 14 is gripped by the plunger transport tool 38 and the body 13 is gripped by the body transport tool 36, both the parts 14 and 13 are assembled until a predetermined screwed state is obtained. , Cycle time (installation time required for one assembly) can be shortened.
  • the plurality of upright plate portions 34 of the rotation suppression jig 33 do not fit into the fitting grooves 16 in the body 13.
  • the plunger 14 is assembled to the body 13
  • the plurality of upright plate portions 34 of the rotation suppressing jig 33 and the fitting grooves 16 in the body 13 are automatically fitted to each other.
  • the body 13 can be lowered or inserted into the rotation suppression jig 33. There is no need to provide a function for fitting the plurality of fitting grooves 16 to the plurality of upright plate portions 34 of the rotation suppressing jig 33.
  • the conveyance of the body 13 to the rotation suppression jig 33 and the conveyance of the plunger 14 to the body 13 held by the rotation suppression jig 33 are both above the rotation suppression jig 33 as shown in FIG. Since it is possible to form a simple path to be lowered after the movement, it is possible to simplify the control of the conveyance of the body conveyance tool 36 and the plunger conveyance tool 38.
  • the retaining ring 24 fitted in advance on the outer peripheral surface of the plunger tip portion 25 is attached to the body 13 by using the pressing portion 45 of the plunger transport tool 38 in association with the assembly of the plunger 14 and the body 13. Therefore, the plunger carrier 21 can be used effectively with respect to holding the retaining ring 24 in the holding groove 21 on the inner peripheral edge of the opening of the body 13.
  • FIG. 15 shows a second embodiment.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the plunger transport tool 38 has only a gripping function and no rotation function with respect to the plunger 14. It shows what is rotated about the axis OJ.
  • a recess 46 is formed in the work plate 37A constituting the work surface 37, and the rotation suppression jig 33 is accommodated in the recess 46 so as to be relatively rotatable.
  • a support shaft 47 is provided on the outer surface of the bottom of the rotation restraining jig 33, and the support shaft 47 extends through the bottom of the recess 46 to rotate below the work plate 37 ⁇ / b> A.
  • the driving force of the motor 48 is transmitted as a rotational force via a driving force transmission mechanism (specifically, gears) 49.
  • the rotation suppression jig 33 can be rotated about the axis OJ by using the driving force of the motor 48, and the plunger transport tool 38 need not have a function of rotating the plunger 14. .
  • a plurality of fitting grooves extending radially about the axis of the rotation suppression jig 33 are formed on the inner surface of the bottom of the rotation suppression jig 33, while the rotation suppression jig 33 is formed on the end surface of the peripheral edge of the body 13.
  • a plurality of upright plate portions that fit into the plurality of fitting grooves are formed in correspondence with the plurality of fitting grooves.
  • the number of the plurality of upright plate portions 34 and the number of the plurality of fitting grooves 16 are not limited to four, but two or more are sufficient, and three or more are preferable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne une automatisation d'assemblage et l'invention a pour objectif d'assembler un piston plongeur et un corps de la manière la précise et la plus rapide possible. Une surface circonférentielle extérieure d'un piston plongeur (14) est vissée avec une surface circonférentielle intérieure d'un corps cylindrique (13), et un ressort de piston plongeur (32) est intercalé entre le corps (13) et le piston plongeur (14). Un gabarit de suppression de rotation (33) utilisé au cours de l'assemblage comporte une pluralité de parties formant plaques verticales (34), et une pluralité de rainures de mise en prise (16) qui viennent se mettre en prise avec la pluralité de parties formant plaques verticales (34) sont formées de manière correspondante sur une autre surface d'extrémité (13b) du corps. Une paire de surfaces de retenue (25A) formant des surfaces plates sont formées sur une partie de pointe (25) de piston plongeur de manière à être orientées l'une l'autre dans une direction radiale du piston plongeur (14).
PCT/JP2014/083340 2014-12-17 2014-12-17 Rattrapeur de jeu mécanique et procédé de fabrication de rattrapeur de jeu mécanique WO2016098188A1 (fr)

Priority Applications (1)

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PCT/JP2014/083340 WO2016098188A1 (fr) 2014-12-17 2014-12-17 Rattrapeur de jeu mécanique et procédé de fabrication de rattrapeur de jeu mécanique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/083340 WO2016098188A1 (fr) 2014-12-17 2014-12-17 Rattrapeur de jeu mécanique et procédé de fabrication de rattrapeur de jeu mécanique

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WO2016098188A1 true WO2016098188A1 (fr) 2016-06-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108180048A (zh) * 2017-12-15 2018-06-19 潍柴动力股份有限公司 一种气门间隙调整装置
CN108331630A (zh) * 2018-02-05 2018-07-27 安徽江淮汽车集团股份有限公司 一种摇臂式发动机气门间隙调节装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563187A (en) * 1979-06-20 1981-01-13 Tokico Ltd Bolt clamping machine
JPS60138618U (ja) * 1984-02-24 1985-09-13 豊田工機株式会社 ねじ締め装置
JP2008286000A (ja) * 2007-05-15 2008-11-27 Ntn Corp ラッシュアジャスタ
JP2009257305A (ja) * 2008-03-24 2009-11-05 Ntn Corp ラッシュアジャスタ
JP2009270565A (ja) * 2008-04-09 2009-11-19 Ntn Corp ラッシュアジャスタ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563187A (en) * 1979-06-20 1981-01-13 Tokico Ltd Bolt clamping machine
JPS60138618U (ja) * 1984-02-24 1985-09-13 豊田工機株式会社 ねじ締め装置
JP2008286000A (ja) * 2007-05-15 2008-11-27 Ntn Corp ラッシュアジャスタ
JP2009257305A (ja) * 2008-03-24 2009-11-05 Ntn Corp ラッシュアジャスタ
JP2009270565A (ja) * 2008-04-09 2009-11-19 Ntn Corp ラッシュアジャスタ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108180048A (zh) * 2017-12-15 2018-06-19 潍柴动力股份有限公司 一种气门间隙调整装置
CN108331630A (zh) * 2018-02-05 2018-07-27 安徽江淮汽车集团股份有限公司 一种摇臂式发动机气门间隙调节装置
CN108331630B (zh) * 2018-02-05 2019-08-06 安徽江淮汽车集团股份有限公司 一种摇臂式发动机气门间隙调节装置

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