WO2014181872A1 - 懸架コイルばね及びストラット型懸架装置 - Google Patents
懸架コイルばね及びストラット型懸架装置 Download PDFInfo
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- WO2014181872A1 WO2014181872A1 PCT/JP2014/062502 JP2014062502W WO2014181872A1 WO 2014181872 A1 WO2014181872 A1 WO 2014181872A1 JP 2014062502 W JP2014062502 W JP 2014062502W WO 2014181872 A1 WO2014181872 A1 WO 2014181872A1
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- WIPO (PCT)
- Prior art keywords
- coil spring
- suspension coil
- seat
- suspension
- contact
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/14—Resilient suspensions characterised by arrangement, location or kind of springs having helical, spiral or coil springs only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
- B60G15/063—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper characterised by the mounting of the spring on the damper
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/047—Wound springs characterised by varying pitch
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/12—Attachments or mountings
- F16F1/123—Attachments or mountings characterised by the ends of the spring being specially adapted, e.g. to form an eye for engagement with a radial insert
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/10—Independent suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/10—Independent suspensions
- B60G2200/14—Independent suspensions with lateral arms
- B60G2200/142—Independent suspensions with lateral arms with a single lateral arm, e.g. MacPherson type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/12—Wound spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/30—Spring/Damper and/or actuator Units
- B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
- B60G2202/312—The spring being a wound spring
-
- 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
- B60G2204/124—Mounting of coil springs
- B60G2204/1242—Mounting of coil springs on a damper, e.g. MacPerson strut
-
- 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
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
-
- 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
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
- B60G2206/426—Coil springs having a particular shape, e.g. curved axis, pig-tail end coils
Definitions
- the present invention relates to a suspension coil spring used for a strut type suspension system for a motor vehicle, and a strut type suspension system provided with the suspension coil spring.
- a strut type suspension system widely used as a suspension system for automobiles is configured to use a shock absorber as a strut for positioning with respect to a wheel.
- the shock absorber as the strut includes a cylinder, a rod slidably supported by the cylinder, and a suspension coil spring disposed on the outer peripheral side of the rod.
- the upper end of the rod is connected to the vehicle body via a strut mount or the like, and the lower end of the cylinder is rigidly connected to a knuckle that rotatably supports the wheel.
- the knuckle is pivotally connected to the vehicle body via a lower arm.
- the suspension coil spring is disposed in a compressed state between an upper seat fixed to the vehicle body side and a lower seat fixed to the cylinder outer peripheral surface, and is supported on the outer peripheral side of the rod.
- the above-mentioned strut type suspension system has the merit that the number of parts is small and the structure is simple and the installation space is small as compared with other independent type suspension systems.
- Patent Document 1 proposes that a suspension coil spring be S-shaped in a no-load state.
- Patent Document 3 provides a plurality of protrusions in the end winding portion, and the protrusion selectively receives a spring seat depending on the size of the load applied to the suspension coil spring.
- Patent Document 4 proposes a configuration in which one strong contact portion is provided on each of the upper end winding and the lower end winding of the suspension coil spring.
- the present invention has been made in view of the above points, and is provided with a suspension coil spring that can reduce the installation space and can suppress the occurrence of friction in the shock absorber, and the suspension coil spring. It is an object of the present invention to provide a strut type suspension system.
- a suspension coil spring mounted between an upper seat and a lower seat in a strut type suspension system for a motor vehicle has an upper seat coil seated on the upper seat when the suspension coil spring is mounted. And a lower end coil has a coil spring main body seated on the lower seat.
- the upper seat and the upper winding substantially contact at two upper contact points on the upper winding.
- the lower seat and the lower end winding substantially contact at one lower contact point of the lower end winding.
- the two upper contact points are arranged to be separated in the front-rear direction of the upper end-turn vehicle.
- the lower contact point of one point is disposed at a position in the vehicle outward direction from a plane parallel to the center axis of the seat winding, passing through the upper contact points of the two points of the lower seat.
- the mounting space of the coil spring can be reduced, and the occurrence of friction of the shock absorber can be suppressed, and furthermore, a uniform load (spring reaction force) can be applied to the strut mount bearing portion. It is possible to suppress the prying of the strut mount by acting.
- FIGS. 1 and 3 show a suspension coil spring 10 according to an embodiment of the present invention
- FIG. 2 shows a strut type suspension system 12 (hereinafter simply referred to as a suspension system 12) on which the suspension coil spring 10 is assembled. It shows.
- a suspension system 12 strut type suspension system 12
- FIG. 2 about the part except the support part of the upper end part of the suspension apparatus 12, it has shown with the dashed-two dotted line.
- the suspension system 12 includes a shock absorber 14 as a strut for positioning the wheel 44, as shown in FIG.
- the shock absorber 14 is connected to a cylinder 16 in which a fluid such as gas or oil is sealed and a piston (not shown) slidably disposed in the cylinder 16 and has a rod 18 protruding upward from the cylinder 16.
- a fluid such as gas or oil
- a piston not shown
- the rod 18 is elastically connected at its upper end to the vehicle body 30 of the vehicle via a strut mount 20. Further, an upper seat 22 is disposed on the upper end side of the rod 18, and a lower seat 24 is disposed at an intermediate portion of the cylinder 16.
- the suspension coil spring 10 is disposed at an outer peripheral position of the shock absorber 14 in a compressed state between the upper seat 22 and the lower seat 24. As a result, a spring reaction force WR is generated in the suspension coil spring 10 in the mounted state.
- an axis on which the spring reaction force WR acts is referred to as a spring reaction axis AR.
- the lower end of the shock absorber 14 is rigidly coupled to a knuckle 26 that rotatably supports the wheel 44.
- the knuckle 26 is pivotally connected to the vehicle body 30 of the vehicle via a lower arm 28.
- the wheel 44 pivotally supported by the knuckle 26 supports the vehicle body 30 via the shock absorber 14 and the suspension coil spring 10, and supports the vehicle body 30 via the lower arm 28.
- FIG. 1 shows a suspension coil spring 10 in a free state in which no load is applied.
- the suspension coil spring 10 is formed with an upper end winding portion 32 seated on the upper seat 22 on the upper side of the coil spring main body 11 and a lower end winding portion seated on the lower side seat 24 below the coil spring main body 11 34 are formed.
- the suspension coil spring 10 is configured such that the coil axis connecting the centers of the outer diameters of the coil spring main body 11 is in a straight line in a free state where no load is applied, but is limited thereto is not.
- D is set equally, it is not limited to this.
- the upper wound portion 32 is seated on the upper seat 22 and the lower wound portion 34 is seated on the lower seat 24.
- the upper seat 22 and the lower seat 24 are formed in a substantially disc shape, and rib-shaped mounting portions 22a and 24a are formed at the central position thereof.
- the upper wound portion 32 and the lower wound portion 34 of the suspension coil spring 10 are mounted on the upper seat 22 and the lower seat 24 so that the mounting portions 22a and 24a are inserted therein.
- the suspension coil spring 10 is positioned at the upper seat 22 and the lower seat 24.
- the center position of the upper end winding portion 32 is referred to as the upper end wound center point CMU, and the center position of the lower end winding portion 34 is referred to as the lower end wound center point CML (see FIG. 3).
- a line segment extending in the longitudinal direction of the vehicle through the upper end winding center point CMU is referred to as an upper longitudinal direction line FBU, and a line segment extending in the lateral direction of the vehicle through the upper end winding center point CMU is an upper left lateral direction line It is called RLU.
- a line segment extending through the lower end winding center point CML in the vehicle longitudinal direction is called a lower longitudinal line FBL, and a line segment extending through the lower end winding center point CML in the vehicle lateral direction is lower. It is called the side left and right direction line RLL.
- an axis connecting the upper end winding center point CMU of the upper seat 22 and the lower end winding center point CML is referred to as an end winding center axis CM.
- the suspension coil spring 10 is configured such that the coil shaft and the end-fold central axis CM coincide with each other in the free state where no load is applied, but the present invention is not limited thereto.
- the upper wound portion 32 has 0.5 turns (180 degrees). Further, as shown in FIG. 3, the upper end winding portion 32 is configured to be substantially symmetrical with respect to the upper left and right direction line RLU.
- the upper end-turn portion 32 of 0.5 turns has a substantially semicircular shape in a plan view (that is, when the upper end-turn portion 32 is viewed from above in the direction of the end-turn central axis CM). Therefore, the upper end-turning portion 32 of 0.5 turns is configured to have a pair of end portions P1 and P2 separated by 180 ° (see FIG. 3).
- the upper wound portion 32 mainly contacts the upper seat 22 at the ends P1 and P2 (hereinafter, the ends P1 and P2 are referred to as an upper contact point P1 and an upper contact point P2).
- the upper contact point P1 is an upper end portion of a spring wire constituting the suspension coil spring 10. Further, the upper contact point P2 is at a position wound 0.5 times the upper contact point P1 (that is, a position wound 180 ° from the upper contact point P1).
- the two upper contact points P1 and P2 of the upper wound portion 32 are configured to be located on the upper front and rear direction line FBU. Therefore, a line segment connecting the upper contact points P1 and P2 of the upper end winding portion 32 is in a state of being overlapped on the upper front and rear direction line FBU.
- the approximate center position of the upper contact point P1 and the upper contact point P2 is the upper end winding center point CMU.
- the lower wound portion 34 has a reverse pitch.
- the reverse pitch means winding a spring wire so as to reduce the pitch.
- the lower end winding portion 34 is configured to have an angle ⁇ indicated by a double arrow with respect to the horizontal direction.
- the lower wound portion 34 is 0.75 wound from the lower end of the spring wire constituting the suspension coil spring 10.
- the number of turns from the lower end portion of the spring wire is not limited to 0.75, and may be from 0 (in this case, the lower end winding portion 34 does not have a reverse pitch) to nearly 1 turn.
- the lower wound portion 34 contacts the lower seat 24 at substantially one point.
- a plane PLA (a plane shown by a dashed dotted line in FIG. 3) passing through the two upper contact points P1 and P2 described above is parallel to the center winding axis CM
- the lower side winding portion 34 has this plane PLA.
- the lower seat 24 is configured to be in contact with the lower seat 24 at a substantially single point P3 located in the vehicle outer direction (indicated by the arrow OUT in FIG. 3 and the like) (hereinafter, this point P3 is referred to as the lower contact point P3).
- the lower contact point P3 is spaced apart from the lower end winding center point CML by a distance L indicated by a double arrow in FIG. 3 on the lower left and right direction line RLL as shown in FIG. It is considered to be a position.
- AS denotes a strut axis which is a central axis of the shock absorber 14
- AK denotes a kingpin axis which is a steering central axis of the wheel 44
- AL denotes a lower arm axis which is a central axis of the lower arm 28
- AA denotes a shock absorber 14 from the road surface. Indicates the load input axis.
- the road surface reaction force W from the road surface acts on the suspension device 12 in the vertical direction from the center position of the contact surface of the wheel 44 with the road surface. Furthermore, the load axial force WU that opposes the road surface reaction force W acts on the suspension device 12 from the upper end of the shock absorber 14 along the load input shaft AA.
- the lower arm axial force WC which is a combined force of the road surface reaction force W and the load axial force WU acts on the root portion of the lower arm 28 along the lower arm axis AL.
- the end wound central axis CM coincides with the strut axis AS.
- the end-worn central axis CM may be inclined or translated with respect to the strut axis AS.
- FIG. 8 shows a suspension coil spring 100 in which the entire surface of the upper wound portion 132 contacts the upper seat 22 when mounted on the suspension device.
- the lower wound portion 134 has a reverse pitch.
- the lower end winding portion 134 has an angle ⁇ 1 indicated by a double arrow with respect to the horizontal direction.
- the spring reaction force WR mainly acts on the lower contact point P3 because the lower wound portion 134 has the reverse pitch.
- the lower contact point P3 is spaced apart from the lower end winding center point CML in the vehicle outward direction.
- the whole of the upper wound portion 132 is in contact with the upper seat 22.
- the spring reaction force WR acts on the upper seat 22 at a point P4 opposite to the lower contact point P3 with respect to the end-worn central axis CM.
- FIG. 9A and 9B are drawings which demonstrate this.
- FIG. 9A shows the upper seat when the suspension coil 12 is assembled to the suspension 12 and the normal load is applied, in which the entire surface of the upper wound portion 132 contacts the upper seat 22 when assembled to the suspension.
- the stress distribution in the contact between the winding portion 132 and the upper seat 22 is shown
- FIG. 9B shows the stress distribution in the contact between the lower winding portion 134 and the lower seat 24.
- the position P4 at which the spring reaction force WR acts on the upper seat 22 is the inward direction of the vehicle from the upper end winding center point CMU (FIG. 8). In the middle, the position shown by the arrow IN) is greatly separated.
- the spring reaction axis AR connecting the lower contact point P3 and the position P4 is largely inclined and deviates from the load input axis AA.
- the displacement of the load input shaft AA and the spring reaction shaft AR causes a bending moment to act on the shock absorber 14 to increase the friction in the sliding portion of the shock absorber 14 (the portion where the rod 18 slides on the cylinder 16). .
- the upper seat 22 and the upper wound portion 32 substantially form only the two upper contact points P1 and P2. It is configured to contact. Accordingly, the upper seat 22 and the upper wound portion 32 make strong contact at the two upper contact points P1 and P2.
- FIG. 4A shows a stress distribution generated between the upper end turn 32 and the upper seat 22 in a state in which the suspension coil spring 10 according to the present embodiment is assembled to the suspension device 12. It can be seen from FIG. 4A that a large stress is generated between the upper seat 22 and the upper wound portion 32 at the upper contact points P1 and P2.
- the central positions of the upper contact points P1 and P2 substantially coincide with the position of the upper end wound center point CMU. Since upper winding portion 32 is in contact with upper seat 22 substantially at two points, upper winding portion 32 is placed against upper seat 22 centering on upper front and rear direction line FBU connecting upper contact points P1 and P2. Is configured to be rockable.
- the upper action point of the spring reaction force WR is located substantially at the upper end winding center point CMU and does not deviate from this position. .
- the upper seat 22 and the upper wound portion 32 substantially contact each other only at the two upper contact points P1 and P2 is a position other than the upper contact points P1 and P2 of the upper wound portion 32 (hereinafter referred to as The load applied to the positions other than P1 and P2 is smaller than the load applied to the upper contact points P1 and P2 even if the positions P1 and P2 contact the upper seat 22).
- the suspension coil spring 10 When the suspension coil spring 10 is assembled to the suspension device 12, the suspension coil spring 10 is displaced relative to the upper seat 22 by the road surface reaction force W from the road surface via the wheels 44 being input to the suspension device 12 ( See Figures 5A, 5B, 5C). At this time, since the upper wound portion 32 swings about the upper front-rear direction line FBU connecting the upper contact points P1 and P2, in addition to the upper contact points P1 and P2, positions other than P1 and P2 and the upper seat 22 It is conceivable to make contact.
- the load acting on positions other than P1 and P2 at the time of contact is smaller than the load acting on the upper contact points P1 and P2. Therefore, even if the position other than P1 and P2 contacts the upper seat 22, the spring reaction force WR mainly acts on the center position of the upper contact points P1 and P2, that is, the position of the upper end winding center point CMU.
- the lower seat 24 and the lower wound portion 34 are configured to substantially contact at one lower contact point P3. Therefore, the lower seat 24 and the lower wound portion 34 make strong contact at one lower contact point P3.
- FIG. 4B shows a stress distribution diagram generated between the lower end winding portion 34 and the lower seat 24 in a state where the suspension coil spring 10 is assembled to the suspension device 12. It can be seen from FIG. 4B that a large stress is mainly generated between the lower seat 24 and the lower end winding portion 34 at the lower contact point P3.
- the load acting on the position other than P3 at the time of contact is smaller than the load acting on the lower contact point P3. Therefore, even when the position other than P3 contacts the lower seat 24, the spring reaction force WR mainly acts on the lower contact point P3 or a position close thereto.
- the lower contact point P3 at which the lower seat 24 substantially contacts the lower seat winding portion 34 or its proximity point is the lower action point of the spring reaction force WR.
- the lower action point of the spring reaction force WR can be moved by adjusting the angle ⁇ or the like of the lower wound portion 34 with respect to the horizontal direction. Therefore, by adjusting the angle ⁇ or the like with respect to the horizontal direction of the lower end winding portion 34, it is possible to make the spring reaction axis AR substantially coincide with the load input axis AA (AR ⁇ AA).
- the load axial force WU can be canceled by the spring reaction force WR, the lateral force of the shock absorber 14 can be avoided, and the occurrence of friction can be suppressed. Furthermore, since the spring reaction force WR acts on the substantially upper end wound center point CMU, a substantially uniform load is applied to the bearing portion 42 of the strut mount 20, and it is possible to suppress the pricking of the strut mount 20.
- 5A to 5C show the contact states of the upper end winding portion 32 and the upper end seat 22 and the lower end winding portion 34 and the lower end seat 24 when the value of the road surface reaction force W from the wheel 44 changes. There is.
- FIG. 5A shows a state in which the road surface reaction force W is small
- FIG. 5B shows a state in which the road surface reaction force W is normal
- FIG. 5C shows a state in which the road surface reaction force W is large.
- the suspension coil spring 10 deforms according to the magnitude of the road surface reaction force W. With the deformation of the suspension coil spring 10, the contact states of the upper wound portion 32 with respect to the upper seat 22 and the lower wound portion 34 with respect to the lower seat 24 change.
- the upper seat 22 is an upper front-rear direction line connecting the upper contact point P1 and the upper contact point P2. Swing around the FBU. Therefore, even if the suspension coil spring 10 is deformed according to the magnitude of the road surface reaction force W, the upper front and rear direction line FBU always maintains the position passing through the upper end wound center point CMU.
- the lower seat 24 and the lower wound portion 34 also have the lower wound portion 34 in the state where the suspension coil spring 10 according to the present embodiment is assembled to the suspension device 12 also in the lower wound portion 34. It is comprised so that it may contact substantially at one lower contact point P3 provided in. As a result, the lower end winding portion 34 also makes strong contact with the lower seat 24 and the lower contact point P3, and the lower left and right direction line RLL is obtained even if the suspension coil spring 10 is deformed according to the magnitude of the road surface reaction force W. The position is maintained above the lower end winding center point CML in the direction outward of the vehicle.
- FIGS. 6 and 7 show suspension coil springs 60 and 70 which are modified examples of the suspension coil spring 10, respectively.
- the components corresponding to the components of the suspension coil spring 10 shown in FIGS. 1 to 5A are denoted by the same reference numerals and the description thereof will be omitted.
- the suspension coil spring 60 of the modification shown in FIG. 6 has the upper wound portion 32 of about 0.6 turns.
- upper front-rear direction line SFBU1 which is a line segment connecting upper contact points P1 'and P2', extends parallel to upper front-rear direction line FBU.
- the upper wound portion 32 of about 0.6 turns is configured to be substantially symmetrical with respect to the upper left and right direction line RLU.
- the upper front-rear direction line SFBU1 does not intersect with the upper end wound center point CMU, and is separated from the upper end wound center point CMU by a dimension ⁇ M1 indicated by a double arrow in FIG. There is.
- the suspension coil spring 70 of the modification shown in FIG. 7 has the upper wound portion 32 of approximately 0.4 turns.
- upper front-rear direction line SFBU2 which is a line segment connecting upper contact points P1 ′ ′ and P2 ′ ′, is configured to extend parallel to upper front-rear direction line FBU.
- the upper wound portion 32 of about 0.4 turns is configured to be substantially symmetrical with respect to the upper left and right direction line RLU.
- the upper front-rear direction line SFBU2 does not intersect the upper end wound center point CMU, and is separated from the upper end wound center point CMU by a dimension ⁇ M2 indicated by a double arrow in FIG. There is.
- the amount of separation is preferably set in the range of not less than 0.4 and not more than 0.6 in the number of turns of the upper wound portion 32. This is because the upper contact points P1 and P2 are the upper seats when the number of turns of the upper wound portion 32 is less than 0.4 and when the number of turns of the upper wound portion 32 exceeds 0.6. As it is largely separated from the winding center point CMU, friction in the sliding portion of the shock absorber 14 increases, and a biased load (spring reaction force) acts on the bearing portion 42 of the strut mount 20 to cause the strut mount 20 to be distorted. It is because the possibility is high.
- the upper wound portion 32 and the upper seat 22 strongly contact at substantially two points (upper contact points P1 and P2). It was composition.
- the projections may be formed at positions corresponding to the upper contact points P1 and P2 of the upper end turn 32 or the upper seat 22. With this configuration, it is possible to ensure that the upper wound portion 32 and the upper seat 22 make strong contact at two points.
- the lower end winding portion 34 has a reverse pitch, whereby the lower end winding portion 34 makes strong contact with the lower seat 24 at substantially one point, thereby tilting the spring reaction force axis AR. It was composition.
- the spring reaction force axis AR may be configured to be inclined by making the lower wound portion flat and forming the inclined portion in the lower seat.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vehicle Body Suspensions (AREA)
- Springs (AREA)
- Fluid-Damping Devices (AREA)
- Optical Communication System (AREA)
Abstract
Description
11 コイルばね本体
12 懸架装置
14 ショックアブソーバ
20 ストラットマウント
22 上側座
24 下側座
30 車体
32 上側座巻部
34 下側座巻部
42 軸受部
44 車輪
AA 荷重入力軸
AL ロアーアーム軸
AR ばね反力軸
AS ストラット軸
CM 座巻中心軸
CMU 上側座巻中心点
CML 下側座巻中心点
FBU 上側前後方向線
SFBU1、SFBU2 上側前後方向線
FBL 下側前後方向線
RLU 上側左右方向線
RLL 下側左右方向線
W 路面反力
WU 荷重軸線力
WC ロアーアーム軸力
WR ばね反力
P1,P2 上側接触点
P3 下側接触点
Claims (8)
- 自動車用のストラット型懸架装置における上側座と下側座との間に装着される懸架コイルばねであって、
懸架コイルばねの装着状態において上側座巻が前記上側座に着座し、下側座巻が前記下側座に着座するコイルばね本体を有し、
前記装着状態において、前記上側座と前記上側座巻とが、前記上側座巻上の二箇所の上側接触点で実質的に接触し、
前記装着状態において、前記下側座と前記下側座巻とが、前記下側座巻上の一箇所の下側接触点で実質的に接触し、
かつ、二点の前記上側接触点を前記上側座巻の車両の前後方向に離間するよう配設すると共に、一点の前記下側接触点を前記下側座の前記二点の上側接触点を通り座巻中心軸に平行な平面より車両外側方向の位置に配設したことを特徴とする懸架コイルばね。 - 前記上側座巻が前記上側座の中心点を通り車両左右方向に延在する線分に対して略対称となるよう構成したことを特徴とする請求項1記載の懸架コイルばね。
- 前記下側座巻を逆ピッチとしたことを特徴とする請求項1又は2記載の懸架コイルばね。
- 前記上側座巻が前記上側座と接触する二点を結ぶ前記車両の前後方向に延在する線分が、前記上側座巻の中心位置に対し前記車両の左右方向の所定範囲内に位置するよう設定したことを特徴とする請求項1乃至3のいずれか一項に記載の懸架コイルばね。
- 前記所定範囲を前記上側座巻の巻数で0.4巻以上0.6巻以下の範囲とすると共に、前記上側座巻が前記上側座の中心点を通り車両左右方向に延在する線分に対して略対称となるよう構成したことを特徴とする請求項4記載の懸架コイルばね。
- 装着前の自由状態において、前記コイルばね本体のコイル軸が直線となるよう構成したことを特徴とする請求項1乃至5のいずれか一項に記載の懸架コイルばね。
- 前記上側座巻が前記上側座と実質的に接触する二点を結ぶ前記車両の前後方向に延在する線分が、前記上側座の中心点を通り車両前後方向に延在する線分上又は、該車両前後方向に延在する線分に対して略平行となるよう構成したことを特徴とする請求項1乃至6のいずれか一項に記載の懸架コイルばね。
- 請求項1乃至7のいずれか一項に記載の懸架コイルばねを備えたストラット型懸架装置。
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
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MX2015015120A MX365485B (es) | 2013-05-10 | 2014-05-09 | Resorte en espiral de suspension y suspension tipo puntal. |
ES14795241.0T ES2654373T3 (es) | 2013-05-10 | 2014-05-09 | Muelle helicoidal de suspensión y dispositivo de suspensión de tipo torreta |
CN201480025500.9A CN105264256B (zh) | 2013-05-10 | 2014-05-09 | 悬架线圈弹簧以及支柱型悬架装置 |
BR112015027731-4A BR112015027731B1 (pt) | 2013-05-10 | 2014-05-09 | Mola helicoidal da suspensão e suspensão tipo escora |
KR1020157031513A KR101783329B1 (ko) | 2013-05-10 | 2014-05-09 | 현가 코일 스프링 및 스트럿형 현가 장치 |
EP14795241.0A EP2982883B1 (en) | 2013-05-10 | 2014-05-09 | Suspension coil spring and strut-type suspension device |
CA2909860A CA2909860C (en) | 2013-05-10 | 2014-05-09 | Suspension coil spring and strut type suspension |
PL14795241T PL2982883T3 (pl) | 2013-05-10 | 2014-05-09 | Sprężyna śrubowa zawieszenia oraz zawieszenie typu rozpórkowego |
US14/927,659 US9770957B2 (en) | 2013-05-10 | 2015-10-30 | Suspension coil spring and strut type suspension |
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JP2013-100630 | 2013-05-10 | ||
JP2013100630 | 2013-05-10 | ||
JP2014097117A JP5873891B2 (ja) | 2013-05-10 | 2014-05-08 | 懸架コイルばね及びストラット型懸架装置 |
JP2014-097117 | 2014-05-08 |
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US14/927,659 Continuation US9770957B2 (en) | 2013-05-10 | 2015-10-30 | Suspension coil spring and strut type suspension |
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WO2014181872A1 true WO2014181872A1 (ja) | 2014-11-13 |
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PCT/JP2014/062502 WO2014181872A1 (ja) | 2013-05-10 | 2014-05-09 | 懸架コイルばね及びストラット型懸架装置 |
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US (1) | US9770957B2 (ja) |
EP (1) | EP2982883B1 (ja) |
JP (1) | JP5873891B2 (ja) |
KR (1) | KR101783329B1 (ja) |
CN (1) | CN105264256B (ja) |
BR (1) | BR112015027731B1 (ja) |
CA (1) | CA2909860C (ja) |
ES (1) | ES2654373T3 (ja) |
HU (1) | HUE034758T2 (ja) |
MX (1) | MX365485B (ja) |
PL (1) | PL2982883T3 (ja) |
TW (1) | TWI589794B (ja) |
WO (1) | WO2014181872A1 (ja) |
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JP2017067237A (ja) * | 2015-10-01 | 2017-04-06 | 日本発條株式会社 | 懸架用コイルばね |
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US10144261B2 (en) * | 2017-01-31 | 2018-12-04 | Nhk Spring Co., Ltd. | Coil spring |
US10065471B2 (en) * | 2017-01-31 | 2018-09-04 | Nhk Spring Co., Ltd. | Coil spring for vehicle suspension |
USD927365S1 (en) * | 2018-06-29 | 2021-08-10 | Zoox, Inc. | Vehicle suspension assembly |
JP7054714B2 (ja) | 2020-02-17 | 2022-04-14 | 本田技研工業株式会社 | 電動サスペンション装置 |
US11919347B2 (en) | 2021-07-05 | 2024-03-05 | APM Engineering and Research Sdn. Bhd. | Coil spring for vehicle suspension system |
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US9770957B2 (en) | 2017-09-26 |
EP2982883A1 (en) | 2016-02-10 |
KR101783329B1 (ko) | 2017-10-23 |
PL2982883T3 (pl) | 2018-03-30 |
US20160046165A1 (en) | 2016-02-18 |
MX2015015120A (es) | 2016-02-18 |
ES2654373T3 (es) | 2018-02-13 |
MX365485B (es) | 2019-06-05 |
KR20150138353A (ko) | 2015-12-09 |
EP2982883A4 (en) | 2016-11-30 |
CN105264256B (zh) | 2017-02-22 |
CA2909860C (en) | 2017-08-01 |
CA2909860A1 (en) | 2014-11-13 |
BR112015027731B1 (pt) | 2021-12-21 |
CN105264256A (zh) | 2016-01-20 |
JP2014237431A (ja) | 2014-12-18 |
HUE034758T2 (en) | 2018-02-28 |
BR112015027731A2 (pt) | 2017-08-29 |
TWI589794B (zh) | 2017-07-01 |
JP5873891B2 (ja) | 2016-03-01 |
EP2982883B1 (en) | 2017-10-18 |
TW201506276A (zh) | 2015-02-16 |
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