WO2012026218A1 - スタビリンクおよびその製造方法 - Google Patents
スタビリンクおよびその製造方法 Download PDFInfo
- Publication number
- WO2012026218A1 WO2012026218A1 PCT/JP2011/065297 JP2011065297W WO2012026218A1 WO 2012026218 A1 WO2012026218 A1 WO 2012026218A1 JP 2011065297 W JP2011065297 W JP 2011065297W WO 2012026218 A1 WO2012026218 A1 WO 2012026218A1
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- WIPO (PCT)
- Prior art keywords
- ball
- mold
- dust cover
- ball seat
- outer peripheral
- Prior art date
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Classifications
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14418—Sealing means between mould and article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
- B60G21/055—Stabiliser bars
- B60G21/0551—Mounting means therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
- B60G21/055—Stabiliser bars
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
- F16C11/0623—Construction or details of the socket member
- F16C11/0628—Construction or details of the socket member with linings
- F16C11/0633—Construction or details of the socket member with linings the linings being made of plastics
- F16C11/0638—Construction or details of the socket member with linings the linings being made of plastics characterised by geometrical details
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
- F16C11/0623—Construction or details of the socket member
- F16C11/0642—Special features of the plug or cover on the blind end of the socket
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
- F16C11/0623—Construction or details of the socket member
- F16C11/0657—Construction or details of the socket member the socket member being mainly made of plastics
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0666—Sealing means between the socket and the inner member shaft
- F16C11/0671—Sealing means between the socket and the inner member shaft allowing operative relative movement of joint parts due to flexing of the sealing means
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0685—Manufacture of ball-joints and parts thereof, e.g. assembly of ball-joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/22—Hinges, pivots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/12—Mounting of springs or dampers
- B60G2204/122—Mounting of torsion springs
- B60G2204/1224—End mounts of stabiliser on wheel suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/416—Ball or spherical joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/42—Joints with cam surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/44—Centering or positioning means
- B60G2204/4404—Retainers for holding a fixing element, e.g. bushing, nut, bolt etc., until it is tightly fixed in position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/10—Constructional features of arms
- B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/81—Shaping
- B60G2206/8101—Shaping by casting
- B60G2206/81012—Shaping by casting by injection moulding
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/02—Shaping by casting
- F16C2220/04—Shaping by casting by injection-moulding
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
- F16C2226/52—Positive connections with plastic deformation, e.g. caulking or staking
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/4984—Retaining clearance for motion between assembled parts
- Y10T29/49845—Retaining clearance for motion between assembled parts by deforming interlock
- Y10T29/49853—Retaining clearance for motion between assembled parts by deforming interlock of sphere, i.e., ball, in socket
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
Definitions
- the present invention relates to a stabilizer link provided with a housing and a support bar, and more particularly to an improvement in manufacturing technology of an integrally formed resin housing and support bar.
- FIG. 1 is a perspective view illustrating a schematic configuration on the front wheel side of the vehicle.
- the suspension device 10 is provided on left and right tires 30 and includes an arm 11 and a cylinder 12.
- the lower end portion of the arm 11 is fixed to a bearing portion that supports the shaft of the tire 30, and the cylinder 12 can be elastically displaced with respect to the arm 11.
- the arm 11 is provided with a bracket 13 to which a stabilizer link 200 is attached.
- the suspension device 10 supports the weight of the vehicle body added to the tire 30.
- the stabilizer device 20 includes a bar 21 having a substantially U-shape, and is attached to the vehicle body via a bush 22. The stabilizer device 20 ensures the roll rigidity of the vehicle.
- the stabilizer link 200 is provided at the end of the bracket 13 of the suspension device 10 and the bar 21 of the stabilizer device 20, and the stabilizer links 200 are connected to each other by a support bar 500.
- the stabilizer link 200 transmits a load generated when the suspension device 10 receives an input from the road surface to the stabilizer device 20.
- FIG. 2 is a side sectional view showing a specific example of a part of the structure of the stabilizer link 200.
- the stabilizer link 200 includes a stud ball 201, a ball seat 301, a housing 302, and a dust cover 401.
- the stud ball 201 has a stud portion 210 and a ball portion 220 that are integrally formed.
- the stud part 210 has a taper part 211, a straight part 212, and a screw part 213.
- the tapered portion 211 is formed at the upper end portion of the ball portion 220.
- a flange portion 214 and a convex portion 215 are formed at the upper end portion and the lower end portion of the linear portion 212.
- a lip portion 411 at the upper end of the dust cover 401 is in contact with and fixed between the flange portion 214 and the convex portion 215 in the linear portion 212.
- the screw portion 213 of the stabilizer link 200 on the suspension device 10 side is fixed to the bracket 13 of the arm 11 by screw fastening, and the screw portion 213 of the stabilizer link 200 on the stabilizer device 20 side is fixed to the bar 21 by screw fastening. .
- the ball seat 301 and the housing 302 constitute a shaft support member that universally supports the stud ball 201.
- a ball portion 220 of the stud ball 201 is press-fitted into the ball seat 301.
- a heat caulking portion 323 is formed on the bottom surface of the ball sheet 301.
- the housing 302 accommodates the ball seat 301.
- the heat caulking portion 323 protrudes through a hole 302 ⁇ / b> A at the bottom of the housing 302, and the tip portion engages with the lower surface portion of the housing 302, whereby the ball seat 301 is fixed to the housing 302.
- the fixing portion 412 at the lower end of the dust cover 400 is sandwiched between the ball seat 301 and the flange portions 321 and 311 of the housing 302 (for example, Patent Documents 1 and 2).
- FIG. 3 (A) to 3 (E) are side sectional views of a partial configuration showing each process of the manufacturing method of the stabilizer link 200.
- the lip portion 411 of the dust cover 401 is inserted between the flange portion 214 and the convex portion 215 so as to be in close contact with the straight portion 212 of the stud ball 201, and held between them. To do.
- the ball portion 220 of the stud ball 201 is press-fitted into the ball seat 301.
- the fixing portion 412 of the dust cover 401 is disposed on the outer peripheral surface side (upper surface side in FIG. 3) of the flange portion 321 of the ball sheet 301.
- Reference numeral 322 denotes a pin portion formed on one surface of the ball sheet 301 (surface opposite to the surface into which the ball portion 220 is press-fitted).
- the integrally formed housing 302 and support bar 500 are assembled to the ball seat 301.
- the fixing portion 412 of the dust cover 401 is sandwiched between the ball seat 301 and the flange portions 321 and 311 of the housing 302, and the pin portion 322 protrudes from the hole portion 302 ⁇ / b> A of the housing 302 to the outside.
- the pin portion 322 of the ball sheet 301 is deformed by heating to form a heat caulking portion 323.
- the ball seat 301 is fixed to the housing 302, whereby the stabilizer link 200 is obtained as shown in FIG.
- a ball sheet made of resin is formed on the ball portion of the stud ball by injection molding.
- the subassembly which consists of a ball part and a ball seat is obtained.
- the subassembly is inserted into the mold as a core, and a molten aluminum alloy is injected into the mold to perform die casting.
- a molten aluminum alloy is injected into the mold to perform die casting.
- a resin housing and a support bar are integrally formed, and the integrally formed housing and support bar are applied to the manufacture of the stabilizer link 200, as shown in FIG.
- a stabilizer link is obtained by assembling the integrally molded housing 302 and the support bar 500 to the ball sheet 301 and performing the process shown in FIG.
- JP-A-6-117429 Japanese Unexamined Patent Publication No. 7-54835 Japanese Patent Application Laid-Open No. 2004-316771 JP 2005-265134 A JP 2009-257507 A
- Patent Document 5 using a resin does not cause the above-described problem of the techniques of Patent Documents 3 and 4 using aluminum.
- the technique of Patent Document 5 can reduce the weight as compared with Patent Documents 1 and 2, since the same manufacturing method as Patent Documents 1 and 2 is used, It was not possible to meet the demand for manufacturing cost reduction in the field.
- the present applicant has proposed a method for manufacturing a stabilizer link in which insert molding is performed by injecting resin as a housing material (for example, Japanese Patent Application No. 2010-120380). Specifically, a cavity is formed by inserting a sub-assembly including a stud ball, a ball sheet, and a dust cover into a mold as a core, and a resin is injected into the cavity to perform injection molding.
- a stabilizer link manufacturing method by insert molding not only can the weight be reduced, but also a heat caulking process for fixing the housing to the ball seat is unnecessary, thereby reducing the manufacturing cost. The effect that it can aim at is acquired.
- the end of the mold is brought into contact with the outer periphery of the fixed portion of the dust cover, and the dust cover is formed between the end of the mold and the outer peripheral side of the flange portion of the ball seat.
- the cavity is formed by the inner surface of the mold, the outer peripheral portion of the ball sheet, and the outer peripheral portion side of the fixed portion of the dust cover.
- the present invention provides a stabilizer link that can effectively prevent leakage of resin to the outside by improving the sealing performance between the dust cover and the mold and between the dust cover and the ball sheet. It aims at providing the manufacturing method.
- a first stabilizer link manufacturing method includes a stud ball having a ball portion, a ball seat having a flange portion extending radially outward from an outer peripheral side surface, and a dust cover having a fixing portion. , Forming a subassembly consisting of a stud ball, ball seat, and dust cover, inserting the subassembly into a mold as a core to form a cavity, and injecting resin into the cavity for injection molding By doing so, a housing that covers the outer periphery of the ball seat and a support bar that supports the housing are integrally formed.
- the ball portion of the stud ball is inserted into the opening of the ball seat, and the dust cover
- the inner peripheral side radial surface of the fixed portion of the ball seat is brought into contact with the outer peripheral side radial surface of the flange portion of the ball seat, and the end of the fixed portion is
- a mold having a radial surface pressing portion extending radially inward is used as the mold, and the inner surface of the mold and the ball sheet
- a predetermined interval between the outer peripheral portion of the mold and the outer peripheral side radial surface of the fixed portion of the dust cover is pressed toward the flange portion by the radial surface pressing portion of the die, and the radial surface pressing portion of the die
- the fixing portion of the dust cover is sandwiched between the flange portion of the ball seat.
- a sub-assembly including a stud ball, a ball seat, and a dust cover is formed, and the sub-assembly is inserted into a mold as a core to form a cavity. Injection molding is performed by injecting resin into the cavity.
- a mold having a radial surface pressing portion extending radially inward is used as the mold, and the outer peripheral side radial surface of the dust cover fixing portion is used as the mold. Are pressed toward the flange portion by the radial surface pressing portion.
- the dust cover and the mold can be separated by appropriately performing the pressing by the radial surface pressing portion of the mold so as to withstand the injection molding pressure by resin injection so that the fixing portion does not separate from the outer peripheral side surface of the ball sheet. It is possible to improve the sealing performance between the gap and the dust cover and the ball sheet. Therefore, leakage of the resin to the outside can be effectively prevented.
- the first stabilizer link manufacturing method of the present invention can use various configurations in order to improve various characteristics.
- the radial length of the radial surface pressing portion of the mold is set to the outer peripheral side of the flange portion of the ball seat. It is preferable to set it equal to or greater than the length of the portion facing the radial surface pressing portion in the radial surface.
- the pressing margin of the fixed portion of the dust cover pressed by the radial surface pressing portion of the mold is set within a range of 5 to 30% of the thickness of the fixed portion.
- the ball sheet In order to obtain a predetermined stud pull-out load with the stabilizer link, it is preferable to cover the ball sheet with a thick thickness near the opening on the side surface of the ball seat.
- the distance between the exposed portion of the outer peripheral side radial surface of the dust cover fixing portion and the center of the ball portion of the stud ball is determined as the ball portion. It is preferable to set it to 1/6 or more of the sphere diameter.
- the radial length of the exposed portion of the outer peripheral side radial surface of the fixed portion of the dust cover to 1 mm or more.
- the side surface of the fixing portion of the dust cover is erected along the axial surface of the flange portion of the ball seat, and the side surface of the fixing portion with respect to the axial surface of the flange portion is It is preferable to set the tightening margin to 2.1 mm to 7.0 mm. Further, the dust cover fixing portion is pressed by the side surface of the mold by pressing the side surface of the fixing portion of the dust cover toward the axial surface of the flange portion of the ball seat by the side surface adjacent to the radial surface pressing portion of the mold. It is preferable to set the pressure allowance within the range of 5 to 30% of the thickness of the fixed portion. It is preferable that the tightening margin of the end portion of the fixed portion of the dust cover with respect to the outer peripheral side surface of the ball seat is set to 2 mm to 5 mm.
- the axial length of the end portion where the protrusion is formed is twice the radial length of the protrusion. It is preferable to set within a range of up to 4 times.
- other protrusions protruding in the direction opposite to the protruding direction of the protrusion may be formed at the end of the fixed portion of the dust cover. In this case, the protrusion and the other protrusion are formed. It is preferable that the axial length of the end portion is set within a range of 2 to 4 times the radial length of the protrusion.
- the second stabilizer link manufacturing method of the present invention includes a stud ball having a ball portion, a flange portion extending radially outward from the outer peripheral side surface, and a groove portion at a boundary portion between the outer peripheral side surface of the flange portion.
- a formed ball sheet and a dust cover having a fixed portion and having a protrusion formed at the end of the fixed portion are prepared to form a sub-assembly including a stud ball, a ball sheet, and a dust cover.
- a housing that covers the outer periphery of the ball seat by inserting a subassembly into a mold as a core to form a cavity, and injecting resin into the cavity to perform injection molding, and a support that supports the housing
- the bar is integrally formed and the ball part of the stud ball is inserted into the opening of the ball seat to form the sub-assembly.
- the inner peripheral side radial surface of the fixing portion is brought into contact with the outer peripheral side radial surface of the flange portion of the ball seat, and a part of the protrusion portion of the fixing portion is engaged with the groove portion to enter the mold of the subassembly.
- a die having a radial surface pressing portion extending radially inward is used as a die, and a predetermined interval is provided between the inner surface of the die and the outer peripheral portion of the ball sheet, and the dust cover
- the outer peripheral side radial surface of the fixed portion is pressed toward the flange portion by the radial surface pressing portion of the die, and the fixed portion of the dust cover is sandwiched between the radial surface pressing portion of the die and the flange portion of the ball seat,
- the pinching of the fixing portion is characterized by compressing the protruding portion of the fixing portion with the radial surface pressing portion of the mold and the groove portion of the ball sheet to generate an internal pressure in the protruding portion.
- a dust cover having a fixing portion and having a protrusion formed at the end of the fixing portion is used to narrow the fixing portion when inserting the subassembly into the mold.
- the protrusion of the fixed part is compressed by the radial surface pressing part of the mold and the groove part of the ball sheet to generate internal pressure in the protrusion.
- the internal pressure at the protrusion can be increased.
- the second stabilizer link manufacturing method of the present invention can use various configurations in order to more effectively prevent leakage of the resin to the outside.
- a radial surface pressing portion side taper surface formed at the end of the radial surface pressing portion of the mold, and a flange portion formed in the groove portion of the flange portion of the ball seat and facing the radial surface pressing portion side taper surface It is preferable to press the protrusion with the side taper surface and compress the protrusion toward the inside in the radial direction.
- the stabilizer link of the present invention is manufactured by the method for manufacturing a stabilizer link of the present invention, and the same effect as that of the method for manufacturing a stabilizer link of the present invention can be obtained.
- the stabilizer link of the present invention or the manufacturing method thereof it is possible to obtain such an effect that the leakage of the resin to the outside at the time of insert molding can be effectively prevented.
- FIG. 1 is a perspective view illustrating a schematic configuration on a front wheel side of a vehicle. It is a sectional side view showing the structure of the conventional stabilizer link.
- (A)-(E) are side sectional views of a partial configuration showing each process of a conventional stabilizer link manufacturing method.
- (A)-(D) are side sectional views of a part of composition showing each process of a manufacturing method of a stabilizer link concerning an embodiment of the present invention. It is an expanded sectional side view of the part showing the state of insert molding of the manufacturing method of the stabilizer link which concerns on 1st Embodiment of this invention, and including the fixing
- FIG. 4 (A) to 4 (D) are side sectional views of a partial configuration showing each process of the manufacturing method of the stabilizer link 100 according to the embodiment of the present invention.
- FIG. 5 is an enlarged cross-sectional view of a portion including the fixing portion 412 of the dust cover 401, showing a state of insert molding in the method for manufacturing the stabilizer link 100 according to the first embodiment of the present invention.
- FIG. 6 is an enlarged cross-sectional view showing a state of insert molding of a modified example of the manufacturing method of the stabilizer link 100 according to the first embodiment of the present invention and representing a modified example of the fixing portion 412 of the dust cover 401.
- FIG. 10 is a side view illustrating a schematic configuration of the stud ball 101.
- FIG. 11 is a side sectional view showing a schematic configuration of the ball seat 120. 4 and 10, illustration of the threaded portion of the stud ball 101 is omitted.
- the manufacturing method of the stabilizer link 100 according to the first embodiment is significantly different from the manufacturing method of the stabilizer link 200 shown in FIG. 3 in that the housing and the support bar are obtained by injection molding of resin by insert molding.
- the shape of the ball portion, the configuration of the ball seat, the shape of the dust cover, and the like are changed.
- the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.
- the stud ball 101, the ball sheet 120, and the dust cover 401 are prepared.
- the stud ball 101 is preferably formed by, for example, using a steel ball having a substantially spherical shape as shown in FIG. 10 as the ball portion 110 and welding the ball portion 110 to the stud portion 210.
- a steel ball having a substantially spherical shape as shown in FIG. 10 as the ball portion 110 and welding the ball portion 110 to the stud portion 210.
- the ball sheet 120 has an opening 120A on one side as shown in FIG.
- the outer peripheral side surface 122 is formed with a flange portion 121 extending radially outward therefrom. It is preferable that a groove 121 ⁇ / b> A that engages with the protrusion 413 ⁇ / b> A of the fixing portion 412 of the dust cover 401 is formed at the boundary between the flange 121 and the outer peripheral side surface 122.
- Reference numeral 121B denotes an outer peripheral side radial surface (upper surface of the flange portion 121 in FIGS.
- reference numeral 121C denotes 4 is an axial direction surface of the flange portion 121 (an outer peripheral side surface of the flange portion 121 in FIGS. 5 and 6) with which the inner peripheral side axial direction surface 412C of the fixing portion 412 of the dust cover 401 abuts.
- the groove 123 having a concave shape is formed on the outer peripheral side surface 122 along the circumferential direction.
- a protrusion 133 corresponding to the shape of the groove 123 of the ball seat 120 is formed on the inner peripheral portion of the housing 130, and the respective portions can be fitted. Thereby, like the conventional heat caulking part, sufficient stud pullout strength can be secured.
- the groove portion 123 so as to have a shape divided in the circumferential direction of the outer peripheral side surface 122 of the ball seat 120, the relative rotation operation of the ball seat 120 with respect to the housing 130 can be prevented.
- a protrusion or a tapered portion may be formed on the side surface of the outer peripheral portion.
- the protruding portion has a convex shape and is formed along the circumferential direction.
- a taper part makes the shape which inclines so that it may expand in diameter, for example, as it goes to the bottom part from the upper part side of an outer peripheral part.
- a burr 111 may be formed in the welded portion of the stud ball 110, and in this case, a concave pocket portion 124 that accommodates the burr 111 of the welded portion on the inner peripheral portion of the ball sheet 120. Is preferably formed along the circumferential direction.
- the burr 111 of the welded portion of the stud ball 101 can prevent the stud ball 101 from being hindered from swinging, whereby a sufficient swing angle of the stud ball 101 can be secured. .
- a lip portion 411 is formed at one end portion, and a fixing portion 412 is formed at the other end portion. It is preferable that a protrusion 413A is formed on the inner peripheral surface of the end 413 of the fixing portion 412. Further, as shown in FIG. 6, a protrusion 413B (another protrusion) protruding in the direction opposite to the protrusion direction of the protrusion 413A is formed on the outer peripheral surface of the end 413 of the fixing portion 412. Good.
- the side surface of the fixed portion 412 has a shape erected along the axial direction.
- the inner peripheral side surface of the fixed portion 412 is an inner peripheral axial surface 412C
- the outer peripheral side surface of the fixed portion 412 is an outer peripheral axial surface 412D.
- Reference numeral 412A denotes an inner peripheral radial surface of the fixing portion 412 of the dust cover 401 (lower surface of the fixing portion 412 in FIGS. 5 and 6)
- reference numeral 412B denotes an outer peripheral radial direction of the fixing portion 412 of the dust cover 401. It is a surface (the upper surface of the fixing
- the lip portion 411 at one end of the dust cover 401 is inserted between the flange portion 214 and the convex portion 215 so as to be in close contact with the straight portion 212 of the stud ball 101, Hold between.
- the ball portion 110 of the stud ball 101 is press-fitted into the ball sheet 120, and the inner peripheral side radial surface 412A of the fixing portion 412 at the other end of the dust cover 401 is moved to the ball. It is made to contact
- the end portion 413 of the fixing portion 412 is brought into contact with the outer peripheral side surface 122 of the ball seat 101.
- the protruding portion 413A of the end portion 413 protrudes toward the groove portion 121A of the flange portion 121 and is engaged.
- a sub-assembly 100A including the stud ball 101, the ball sheet 120, and the dust cover 401 is obtained.
- FIG. 4C shows a cross-sectional configuration in the vertical direction of the axial direction of the support bar 140, and is a cross-sectional view of a configuration including a mold portion for housing molding.
- the mold 60 has a form extending in the direction perpendicular to the paper surface.
- a die 60 having a die piece 62 having a radial surface pressing portion 62A having a linear shape extending radially inward is used.
- a predetermined interval is provided between the inner surface of the mold main body 61 and the outer periphery of the ball seat 120 as shown in FIG.
- the outer peripheral side radial surface 412B of 412 is pressed toward the flange portion 121 by the radial surface pressing portion 62A of the mold piece 62, and the fixing portion 412 is held between the radial surface pressing portion 62A and the flange portion 121.
- the cavity 70 is formed by the inner surface of the mold 60, the outer peripheral portion of the ball sheet 120, and the fixing portion 412 of the dust cover 401.
- the cavity surface of the mold 61 has a shape corresponding to the outer peripheral shape of the housing and the support bar.
- FIG. 12 shows a configuration of a specific example of a housing and a support bar obtained by insert molding of a stabilizer link according to an embodiment of the present invention
- (A) shows an example in which the phase angle between the housings is 0 degree
- (B) shows It is a figure of the example whose phase angle of housings is more than 0 degree and less than 180 degree
- a split mold is formed at the boundary between the support bar 500 and the support bar 500 at one end of the support bar 500.
- the cross-sectional shape of the split mold flange portion 501 is, for example, a substantially perfect circle.
- the mold 60 When molding the housing 130 and the support bar 500 shown in FIG. 12B, the mold 60 has a form in which a mold part for housing molding is provided at both ends of the mold part for supporting bar molding.
- the mold 60 is formed with a first split mold for forming the housing 130 on the one end side of the support bar 500 (the housing 130 having the split mold flange portion 501), and the support bar 500 and the housing 130 on the other end side.
- the second split mold is used as the mold 60.
- a split mold capable of adjusting the rotation angle of the first split mold with respect to the second split mold at a portion corresponding to the split mold flange portion 501 can be used.
- a normal cam member or the like can be used as a drive means for the lower mold of the split mold composed of the first and second split molds.
- the mold 60 a split mold in which the rotation angle of the first split mold with respect to the second split mold in the part corresponding to the split mold flange portion 501 can be used. It can be arbitrarily set within the range of 0 to 180 degrees.
- the resin used in the injection molding is a resin that is a material of the housing and the support bar, and as the material, for example, to secure a predetermined strength, for example, nylon 66 containing 30% by weight of glass fiber, It is preferable to use nylon 46 containing 30% by weight glass fiber and PPS (polyphenylene sulfide) containing 30% glass fiber by weight. In this case, the content weight of the glass fiber can be appropriately set according to the required characteristics of the housing and the support bar.
- the housing 130 covering the outer periphery of the ball seat 120 and the support bar 500 supporting the housing 130 are integrally molded to stabilize the stabilizer.
- a link 100 is obtained.
- the melting point of the resin that is the material of the ball sheet 120 is lower than that of the resin that is the material of the housing 130 and the support bar 500, the heat is generated during the injection molding in the insert molding.
- the ball sheet 120 is deformed and contracted by the pressure.
- the relationship between the injection molding conditions temperature, pressure, injection time, etc.
- the ball part 110 and the ball sheet 120 are used by using at least one of the ball sheet 120 whose inner diameter is set to a predetermined value and the ball part 110 whose outer diameter is set to a predetermined value. Can be set to a predetermined value. Then, by performing injection molding while appropriately controlling the injection conditions in insert molding, it is possible to set the tightening allowance of the ball sheet 120 to an optimum value after injection molding.
- the ball sheet 120 can be set by appropriately setting the molding time. It is possible to prevent thermal degradation of the. Therefore, unlike the case of using aluminum as the material for injection molding, an inexpensive polyacetal material can be used as the material for the ball sheet 120. Further, when the rubber dust cover 401 is assembled at the time of forming the subassembly 100A and the subassembly 100A is used as a core, the injection molding temperature can be set low as described above. Unlike the case where aluminum is used, even when the resin is in direct contact with the rubber dust cover 401, thermal degradation of the dust cover 401 can be prevented.
- the sub assembly 100A composed of the stud ball 101 and the ball sheet 120 is inserted into the mold 60 as a core to form the cavity 70 and insert molding is performed in which resin is injected into the cavity 70, the ball sheet 120 is formed. Therefore, the conventional process (step of FIG. 3D) for performing heat caulking is unnecessary. Thus, since the number of manufacturing steps can be reduced, the manufacturing cost can be reduced.
- the tightening allowance of the ball sheet 120 can be set to an optimum value after injection molding by insert molding.
- a structure in which the end portion 131 of the housing 130 and the flange portion 121 of the ball seat 120 sandwich the fixing portion 412 of the dust cover 401 can be used, a step of attaching the dust cover 401 separately after insert molding is unnecessary.
- parts such as a circlip used in the conventional method using aluminum become unnecessary. As a result, the manufacturing cost can be further reduced.
- the cavity 70 is filled with resin, and the housing 130 made of resin is in close contact with the outer peripheral portion of the ball seat 120 and the fixing portion 412 of the dust cover 401. To do.
- the fastening margin of the housing 130 with respect to the ball seat 120 can be set to a desired value, the torque characteristics and the elastic lift can be set to desired values. Therefore, since it is not influenced by the variation in the dimension of the mating member, the dimension management becomes unnecessary.
- the outer peripheral side radial surface 412B of the fixing portion 412 of the dust cover 401 is pressed toward the flange portion 121 by the radial surface pressing portion 62A of the mold piece 62, thereby The fixing portion 412 of the dust cover 401 is held between the radial surface pressing portion 62 ⁇ / b> A of 62 and the flange portion 121. As a result, the space between the dust cover 401 and the mold piece 62 can be sealed.
- the outer peripheral side radial surface 412B of the fixed portion 412 is formed by the radial surface pressing portion 62A. It is pressing toward the flange portion 121, and the pressing needs to be performed to such an extent that it can withstand the injection molding pressure by resin injection.
- the radial surface pressing portion 62A is excessively pressed, the end portion 413 of the fixing portion 412 is separated from the outer peripheral side surface 122 of the ball seat 120 in the portion indicated by the symbol P in FIG. There is a possibility that resin flows between 401 and the ball sheet 120.
- the sealing performance between the dust cover 401 and the ball sheet 120 can be improved by appropriately pressing the radial surface pressing portion 62A so as to withstand the injection molding pressure caused by resin injection.
- the inner circumferential side radial surface 412A of the fixing portion 412 of the dust cover 401 is pressed against the outer circumferential side radial surface 121B of the flange portion 121 of the ball sheet 120, the dust cover 401 and the ball sheet 120 Further improvement in sealing performance can be achieved.
- the pressing by the radial surface pressing portion 62A of the mold piece 62 is appropriately performed to the extent that it can withstand the injection molding pressure by the resin injection, and between the dust cover 401 and the mold piece 62 and Since the gap between the dust cover 401 and the ball sheet 120 can be reliably sealed, leakage of resin to the outside can be effectively prevented in insert molding.
- the pressing margin of the fixing portion 412 is set to 5 to 30% of the thickness of the fixing portion 412.
- the pressure margin is the ratio of the thickness of the portion of the outer peripheral side radial surface 412B (the upper surface in FIGS. 5 and 6) of the fixing portion 412 crushed by the pressing by the radial surface pressing portion 62A (of the fixing portion 412).
- the ball seat 120 is used in the stabilizer link 100. It is necessary to sandwich the dust cover 401 between the flange portion 121 and the end portion 131 of the housing 130. In order to obtain a predetermined stud pulling load by the stabilizer link, it is preferable that the housing 130 is thickly covered to the vicinity of the opening 120A on the outer peripheral side surface 122 of the ball seat 120.
- the interval N2 between the exposed portion of the outer peripheral side radial surface 412B of the fixing portion 412 of the dust cover 401 and the center of the ball portion 110 of the stud ball 101 is set to the ball diameter of the ball portion 110. It is preferable to set it to 1/6 or more. For example, in the case of a ⁇ 16 ball, the interval N2 is preferably set to 2.7 mm or more. Further, in the radial direction, it is preferable to set the radial length L1 of the exposed portion of the outer peripheral side radial surface 412B of the fixed portion 412 to 1 mm or more.
- the side surface of the fixing portion 412 is used as the inner peripheral side axial direction surface 412C, and the axial surface 121C of the flange portion 121 of the ball seat 120 (FIGS. 5 and 6). It is preferable to form in a shape corresponding to the outer peripheral side surface. In this case, the inner peripheral side axial direction surface 412C of the fixing portion 412 is erected along the axial direction surface 121C of the flange portion 121 of the ball seat 120.
- the inner peripheral side axial surface 412C of the fixed portion 412 preferably has a fastening margin of 2.1 mm to 7.0 mm with respect to the axial surface 121C of the flange portion 121.
- the fastening allowance is a difference between the outer diameter of the axial surface 121C of the flange portion 121 and the inner diameter of the inner peripheral side axial surface 412C of the fixed portion 412 in the free state.
- the end portion 413 of the fixing portion 412 of the dust cover 401 preferably has an allowance of about 2 mm to 5 mm with respect to the outer peripheral side surface 122 of the ball seat 120.
- the fastening allowance is the difference between the outer diameter of the outer peripheral side surface 122 of the ball seat 120 and the inner diameter of the axial direction surface of the end portion 413 of the fixing portion 413 of the fixing portion 412 in the free state.
- the pressing length in the axial direction is preferably L4 or more.
- L4 is the axial length of the substantially linear part of the cross section of the axial surface 121C of the flange 121, and is the length to the outer peripheral radial surface 121B.
- the pressure allowance is the ratio of the thickness of the portion of the outer peripheral side axial surface 412D of the fixed portion 412 crushed by the pressure by the side surface 62B (the amount of the portion of the outer peripheral axial direction surface 412D of the fixed portion 412 crushed) The thickness of the portion of the outer peripheral side axial direction surface 412D of the fixed portion 412 in a free state).
- the outer peripheral side axial direction surface 412D of the fixing portion 412 is pressed toward the flange portion 121 by the side surface 62B adjacent to the radial direction pressing portion 62A, whereby the inner peripheral side axial direction surface of the fixing portion 412 is pressed. Since 412C can be reliably pressed toward the flange portion 121, it is possible to improve the sealing performance between the side surface 62B of the mold piece 62 and the outer peripheral side axial surface 412D of the fixed portion 412. In addition, the sealing performance between the axial surface 121C of the flange 121 and the inner peripheral axial surface 412C of the fixed portion 412 can be further improved. In this way, it is possible to further improve the sealing performance in the axial direction.
- the axial length L2 of the end portion 413 of the fixing portion 412 on which the protruding portion 413A is formed is set to the radial length of the protruding portion 413A. It is preferable to set within the range of 2 to 4 times the length L3.
- the axial length L2 is set to be less than twice the radial length L3, when the pressing is performed by the radial surface pressing portion 62A of the die piece 62, the fixed portion of the dust cover 401 at the portion indicated by P in FIG. The end portion 413 of 412 is easily separated from the outer peripheral side surface 122 of the ball seat 120.
- the fixing portion 412 is securely fastened to the ball seat 120, so that the posture of the fixing portion 412 is stable.
- the axial length L2 when the axial length L2 is set to be more than four times the radial length L3, the axial length of the flange portion 121 of the ball seat 120 becomes unnecessarily long. Further, the ball sheet 120 is fixed by the housing 130 through the rubber of the dust cover 401 in the flange portion 121, and the resin of the housing 130 that contributes to the pulling load of the stud is pressed down to the vicinity of the opening of the ball sheet 120. Become imperfect. On the other hand, when the axial length L2 is set to be not more than four times the radial length L3, such a problem does not occur.
- a protruding portion 413 ⁇ / b> B that protrudes in the direction opposite to the protruding direction of the protruding portion 413 ⁇ / b> A may be formed on the end portion 413 of the fixing portion 412 of the dust cover 401.
- L2 is the length in the axial direction of the end portion 413 of the fixing portion 412 where the protruding portions 413A and 413B are formed.
- a protrusion 414 is formed at the end 413 of the fixing portion 412 of the dust cover 401, and the first point is that the protrusion 414 is pressed by the pressing surface of the radial surface pressing portion 62 ⁇ / b> A of the mold piece 62. This is different from the protrusions 413A and 413B of the embodiment.
- the broken line of FIG. 8, 9 has shown the initial shape (state before compression) of the projection part 414.
- a tapered surface 62C is formed at the tip of the pressing surface of the radial surface pressing portion 62A of the mold piece 62, and the radial surface pressing portion 62A is formed in the groove 121A of the flange portion 121 of the ball seat 120.
- a tapered surface 121D is formed to face the tapered surface 62C.
- the surfaces facing the tapered surfaces 62C and 121D are tapered.
- the initial shape of the protrusion 414 corresponds to the space formed by the outer peripheral side surface 122 of the ball seat 120, the groove 121A of the flange 121, and the tapered surface 62A of the radial surface pressing portion 62A of the die piece 62. And is set to be larger than the shape of the space.
- the projecting portion 414 is pressed toward the central portion by the component force on the tapered surface 62C of the radial surface pressing portion 62A and the tapered surface 121D of the flange portion 121.
- the protrusion 414 is pressed by the outer peripheral side surface 122 of the ball seat 120, the groove 121A of the flange 121, and the radial surface pressing portion 62A of the mold piece 62, and an internal pressure is generated in the protrusion 414.
- the protrusion 414 expands outward between the distal end portion of the radial surface pressing portion 62 ⁇ / b> A of the mold piece 62 and the outer peripheral side surface 122 of the ball seat 120.
- the shape so that the internal pressure generated at the protrusion 414 is larger than the injection molding pressure, the space between the dust cover 401 and the mold piece 62 and between the dust cover 401 and the ball sheet 120 can be ensured. Since sealing can be performed, leakage of resin to the outside during insert molding can be effectively prevented.
- the protruding portion 414 is formed in a dumper shape, and the distal end portion of the radial surface pressing portion 62A of the die piece 62 and the flange portion of the ball sheet 120
- the protruding portion 414 is pinched and crushed by the groove 121A of 121.
- the protrusion 414 is pressed by the outer peripheral side surface 122 of the ball seat 120, the groove 121A of the flange 121, and the radial surface pressing portion 62A of the mold piece 62, thereby increasing the internal pressure at the protrusion 414.
- the same effect as that shown in FIG. 8 can be obtained.
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Abstract
Description
(1―1)第1実施形態の製造方法
(A)各製造工程
以下、本発明の第1実施形態について図面を参照して説明する。図4(A)~4(D)は、本発明の実施形態に係るスタビリンク100の製造方法の各工程を表す一部構成の側断面図である。図5は、本発明の第1実施形態に係るスタビリンク100の製造方法のインサート成形の状態を表し、ダストカバー401の固定部412を含む部分の拡大断面図である。図6は、本発明の第1実施形態に係るスタビリンク100の製造方法の変形例のインサート成形の状態を表し、ダストカバー401の固定部412の変形例を表す拡大断面図である。図10は、スタッドボール101の概略構成を表す側面図である。図11は、ボールシート120の概略構成を表す側断面図である。図4,10では、スタッドボール101のねじ部の図示を省略している。
スタビリンクでは、通常、揺動トルク、回転トルク、弾性リフトの規定値が設定され、通常、いずれの規定値も低く設定する要求が多い。トルクと弾性リフトは相反関係にあり、それら規定値は、ハウジングとボールシートの締め代、あるいは、ボールシートとスタッドボールの締め代に依存する。したがって、車両側の要求特性を満足するために、入力荷重と耐久要件に基づき、締め代を最適値に設定することが重要となる。
以上のようなインサート成形では、図5に示すように、ダストカバー401とボールシート120との間において、ダストカバー401の固定部412の内周側径方向面412A(図5,6の下面)をボールシート120のフランジ部121の外周側径方向面121B(図5,6の上面)に当接させるとともに、固定部412の端部413を、ボールシート101の外周側側面122に当接させる。この場合、端部413の突起部413Aを、フランジ部121の溝部121Aに向かって突出させて係合させている。これにより、ダストカバー401とボールシート120との間をシールすることができる。
第2実施形態では、ダストカバー401と型コマ62との間およびダストカバー401とボールシート120との間のシール性の向上をさらに図るために、各部位の長さの関係や、押圧代、締め代等を特定する代わりに、ダストカバー401の固定部412の端部413の形状や、型コマ62の径方向面押圧部62Aの形状、フランジ部121の溝部121Aの形状に改良を加えている。第2実施形態では、第1実施形態と同様な構成要素には同符号を付し、その説明を省略する。
Claims (13)
- ボール部を有するスタッドボールと、外周側側面から径方向外側に延在するフランジ部を有するボールシートと、固定部を有するダストカバーとを準備し、
前記スタッドボール、前記ボールシート、および、前記ダストカバーからなるサブ組立体を形成し、
前記サブ組立体を中子として型内に挿入してキャビティを形成し、そのキャビティ内に樹脂を注入して射出成形を行うことにより、前記ボールシートの外周部を覆うハウジングおよびそのハウジングを支持するサポートバーを一体成形し、
前記サブ組立体の形成では、前記スタッドボールの前記ボール部を、前記ボールシートの開口部へ挿入し、前記ダストカバーの前記固定部の内周側径方向面を、前記ボールシートの前記フランジ部の外周側径方向面に当接させるとともに、前記固定部の端部を前記ボールシートの前記外周側側面に当接させ、
前記サブ組立体の前記型内への挿入では、前記型として、径方向内側に向かって延在する径方向面押圧部を有する型を用い、前記型の内面と前記ボールシートの前記外周部との間に所定の間隔をあけるとともに、前記ダストカバーの前記固定部の外周側径方向面を前記型の径方向面押圧部により前記フランジ部に向かって押圧し、前記型の前記径方向面押圧部と前記ボールシートの前記フランジ部とで前記ダストカバーの前記固定部を狭持することを特徴とするスタビリンクの製造方法。 - 前記型の前記径方向面押圧部の径方向長さを、前記ボールシートのフランジ部の前記外周側径方向面における前記径方向面押圧部に対向する部分の長さと同等以上に設定することを特徴とする請求項1に記載のスタビリンクの製造方法。
- 前記型の前記径方向面押圧部により押圧される前記ダストカバーの前記固定部の押圧代を、前記固定部の肉厚の5~30%の範囲内に設定することを特徴とする請求項1または2に記載のスタビリンクの製造方法。
- 前記サブ組立体の前記型内への挿入では、前記ダストカバーの前記固定部の前記外周側径方向面の露出部分の径方向長さを1mm以上に設定することを特徴とする請求項1~3のいずれかに記載のスタビリンクの製造方法。
- 前記サブ組立体の前記型内への挿入では、前記ダストカバーの前記固定部の前記外周側径方向面の露出部分と、前記スタッドボールの前記ボール部の中心との間隔を、前記ボール部の球径の1/6以上に設定することを特徴とする請求項1~4のいずれかに記載のスタビリンクの製造方法。
- 前記ダストカバーの前記固定部の前記側面を、前記ボールシートの前記フランジ部の軸線方向面に沿って立設し、前記フランジ部の前記軸線方向面に対する前記固定部の前記側面の締め代を2.1mm~7.0mmに設定することを特徴とする請求項1~5のいずれかに記載のスタビリンクの製造方法。
- 前記ダストカバーの前記固定部の前記側面を、前記型における前記径方向面押圧部に隣接する側面によって前記ボールシートの前記フランジ部の前記軸線方向面に向かって押圧し、
前記型の前記側面により押圧される前記ダストカバーの前記固定部の押圧代を、前記固定部の肉厚の5~30%の範囲内に設定することを特徴とする請求項1~6のいずれかに記載のスタビリンクの製造方法。 - 前記ボールシートの外周側側面に対する前記ダストカバーの前記固定部の前記端部の締め代を、2mm~5mmに設定することを特徴とする請求項1~7のいずれかに記載のスタビリンクの製造方法。
- 前記ダストカバーの前記固定部の前記端部に、前記ボールシートの前記フランジ部の溝部に係合する突起部を形成し、
前記突起部が形成された前記端部の軸線方向長さを、前記突起部の径方向長さの2倍~4倍の範囲内に設定することを特徴とする請求項1~8のいずれかに記載のスタビリンクの製造方法。 - 前記ダストカバーの前記固定部の前記端部には、前記突起部の突出方向とは逆方向に突出する他の突起部を形成し、
前記突起部および前記他の突起部が形成された前記端部の軸線方向長さを、前記突起部の径方向長さの2倍~4倍の範囲内に設定することを特徴とする請求項9に記載のスタビリンクの製造方法。 - ボール部を有するスタッドボールと、外周側側面から径方向外側に延在するフランジ部を有するとともに前記フランジ部における前記外周側側面との境界部に溝部が形成されたボールシートと、固定部を有するとともにその固定部の端部に突起部が形成されたダストカバーとを準備し、
前記スタッドボール、前記ボールシート、および、前記ダストカバーからなるサブ組立体を形成し、
前記サブ組立体を中子として型内に挿入してキャビティを形成し、そのキャビティ内に樹脂を注入して射出成形を行うことにより、前記ボールシートの外周部を覆うハウジングおよびそのハウジングを支持するサポートバーを一体成形し、
前記サブ組立体の形成では、前記スタッドボールの前記ボール部を、前記ボールシートの開口部へ挿入し、前記ダストカバーの前記固定部の内周側径方向面を、前記ボールシートの前記フランジ部の外周側径方向面に当接させるとともに、前記固定部の前記突起部の一部を前記溝部に係合させ、
前記サブ組立体の前記型内への挿入では、前記型として、径方向内側に向かって延在する径方向面押圧部を有する型を用い、前記型の内面と前記ボールシートの前記外周部との間に所定の間隔をあけるとともに、前記ダストカバーの前記固定部の外周側径方向面を前記型の径方向面押圧部により前記フランジ部に向かって押圧し、前記型の前記径方向面押圧部と前記ボールシートの前記フランジ部とで前記ダストカバーの前記固定部を狭持し、
前記固定部の狭持では、前記型の前記径方向面押圧部および前記ボールシートの前記溝部で前記固定部の前記突起部を圧縮して前記突起部に内圧を発生させることを特徴とするスタビリンクの製造方法。 - 前記型の径方向面押圧部の端部に形成された径方向面押圧部側テーパ面と、前記ボールシートの前記フランジ部の溝部に形成されるとともに前記径方向面押圧部側テーパ面に対向するフランジ部側テーパ面とで前記突起部を押圧し、前記突起部を前記径方向内側に向かって圧縮することを特徴とする請求項11に記載のスタビリンクの製造方法。
- 請求項1~12のいずれかに記載のスタビリンクの製造方法により製造されたことを特徴とするスタビリンク。
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CN103052516A (zh) | 2013-04-17 |
JP5189145B2 (ja) | 2013-04-24 |
JP2012041013A (ja) | 2012-03-01 |
EP2610089A1 (en) | 2013-07-03 |
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