WO2008069293A1 - 車両のサスペンション - Google Patents
車両のサスペンション Download PDFInfo
- Publication number
- WO2008069293A1 WO2008069293A1 PCT/JP2007/073630 JP2007073630W WO2008069293A1 WO 2008069293 A1 WO2008069293 A1 WO 2008069293A1 JP 2007073630 W JP2007073630 W JP 2007073630W WO 2008069293 A1 WO2008069293 A1 WO 2008069293A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- suspension
- momentum
- motion
- transmission means
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
-
- 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
- B60G15/07—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 damper being connected to the stub axle and the spring being arranged around 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
- F16F1/12—Attachments or mountings
- F16F1/121—Attachments or mountings adjustable, e.g. to modify spring characteristics
-
- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
-
- 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
Definitions
- the present invention relates to a vehicle suspension, and more particularly to a vehicle suspension having a spring characteristic that is progressive with respect to a vertical stroke of a wheel.
- the spring characteristic of the suspension is preferably a spring characteristic that is progressive with respect to the wheel bounds.
- Suspensions having such progressive spring characteristics have been proposed in various configurations.
- Japanese Utility Model Publication No. 7-1 1 4 0 3 discloses the spring characteristics of a suspension from the neutral position of a wheel.
- Suspension dampers are described that provide progressive spring characteristics to the rook.
- each spring includes a plurality of springs having a constant spring constant and different from each other. Are designed to generate spring force in different regions of the wheel bounce stroke. Therefore, there is a problem that the relationship of the spring force with respect to the wheel bounce stroke is a discontinuous non-linear relationship and not a preferable continuous non-linear relationship.
- the spring characteristic is a progressive spring characteristic for the bounding stroke of the wheel, but the progressive spring characteristic for the rebound stroke of the wheel.
- the wheel rebound is generally regulated by the rebound stopper. For this reason, if the wheel rebounds greatly at a high stroke speed, the rebound of the wheel is rapidly regulated by the rebound stopper, and it is inevitable that a shock will occur due to this.
- the vertical movement of the wheel accompanying the bounce and rebound of the wheel is transmitted to the suspension spring via a link mechanism including a suspension member such as a suspension arm, whereby the suspension spring is elastically deformed. It has become so.
- the elastic deformation of the suspension spring is subject to the restriction of motion transmission by the link mechanism, which causes the problem that the characteristics of the spring force against the bounce and rebound stroke of the wheel are restricted by the motion transmission by the link mechanism. Disclosure of the invention
- the main object of the present invention is to transmit the vertical movement accompanying the bounce and rebound of the wheel to the suspension spring so that the rate of change of the elastic deformation of the suspension spring with the vertical stroke of the wheel gradually changes. It is an object of the present invention to provide a vehicle suspension having a desired progressive spring characteristic for a wheel stroke, preferably both a bound stroke and a rebound stroke, without being restricted by the transmission of motion by the linkage mechanism.
- the suspension member that moves up and down due to the bounce and rebound of the wheel, the suspension spring disposed between the vehicle body and the suspension member, the vehicle body side end of the suspension spring and the suspension respectively.
- the first and second support members that support the end portions on the member side, and the vertical movement of the suspension member are converted into relative movements of a change in the interval between the first and second support members, and the first and second support members are converted.
- a suspension for a vehicle having a motion transmission means for changing the amount of elastic deformation of the suspension spring by transmitting to one of the support members, wherein the motion transmission means includes first and second transmission means,
- the transmission means transmits the vertical movement of the suspension member to the second transmission means, and the second transmission means is transmitted from the first transmission means.
- the transmitted motion is transmitted to one of the first and second support members, and at least one of the first and second transmission means is the amount of motion of the motion transmission destination member relative to the amount of motion of the motion transmission source member.
- the ratio of the relative motion to the suspension member's momentum is continuously changed in a nonlinear manner according to the vertical movement of the suspension member.
- the rate of change of the elastic deformation of the suspension spring can be continuously changed in a non-linear manner in accordance with the stroke of the wheel, so that the suspension spring force characteristic with respect to the wheel stroke is desired. Progressive spring characteristics can be achieved.
- At least one of the first and second transmission means continuously calculates the ratio of the momentum of the motion transmission destination member to the momentum of the motion transmission source member as the momentum of the motion transmission source member increases. It may be arranged to increase non-linearly. -According to this configuration, the momentum of the suspension member is reliably ensured in the process in which the vertical movement of the suspension member is transmitted to one of the first and second support members by the first and second transmission means. The ratio of the relative momentum of the first and second support members to can be increased continuously and non-linearly as the suspension member momentum increases.
- the position of the suspension member when the wheel is in the neutral position is set as the standard position, and the motion transmission means is used when the suspension member moves above the standard position and below the standard position.
- the ratio of the momentum of the relative motion to the momentum of the suspension member may be continuously increased non-linearly as the momentum of the suspension member increases.
- the ratio of the amount of movement of the relative movement of the first and second support members to the wheel stroke in both the bound stroke and the rebound stroke from the neutral position of the wheel is determined as the wheel stroke.
- the rate of change of the spring force of the suspension spring for both the bounce stroke and rebound stroke of the wheel is continuously increased as the wheel stroke increases. It can be increased nonlinearly.
- the motion transmitting means has an input member, an intermediate member, and an output member that are aligned with each other and fitted to each other and that move relative to each other in alignment with the axis.
- the first transmission means converts the linear movement along the axis of the input member into a rotational movement around the axis and transmits it to the intermediate member, and the second transmission means transmits the linear movement along the axis.
- the rotary motion around the axis of the member is converted into a linear motion along the axis and transmitted to the output member, and the output member transmits the linear motion along the axis to one of the first and second support members. It's okay.
- the input member, the intermediate member, and the output member are aligned with each other so as to be aligned with each other and are relatively moved while being aligned with each other, so that the input member and the output member are linearly moved along different axes.
- the axial length of the motion conversion transmission device is reduced, and the motion conversion transmission device is reliably made compact. can do.
- the ratio of the linear momentum of the output member to the linear momentum of the input member is continuously changed in a non-linear manner according to the linear momentum of the input member, and the linear motion of the input member is linearly applied to the output member.
- the first transmission means is configured to continuously and non-linearly increase the ratio of the rotational momentum of the intermediate member to the linear momentum of the input member as the linear momentum from the standard position of the input member increases.
- the second transmission means continuously non-linearly adjusts the ratio of the linear momentum of the output member to the rotational momentum of the intermediate member as the rotational momentum from the standard position of the intermediate member increases.
- the first transmission unit and the second transmission unit can be compared with the structure in which the ratio of the momentum is continuously increased non-linearly by only one of the first transmission unit and the second transmission unit.
- the increase in the ratio of the momentum to be achieved by each of the two transmission means can be reduced.
- the first and second transmission means include a cam provided on the motion transmission source member and a cam follower provided on the motion transmission destination member and engaged with the cam.
- the cam follower is a cam.
- the ratio of the momentum of the motion transmission destination member to the momentum of the motion transmission source member may be continuously changed in a non-linear manner according to the momentum of the motion transmission source member.
- the ratio of the momentum of the motion transmission destination member to the momentum of the motion transmission source member can be reliably increased in a non-linear manner according to the momentum of the motion transmission source member.
- the cam and cam follower settings allow the suspension spring force characteristics to be set to the desired continuous non-linear characteristics for the wheel bounce stroke and rebound stove.
- one of the cam and the cam follower is a cam groove
- the other of the cam and the cam follower is a cam groove engaging member that engages with the cam groove and moves along the cam groove.
- At least one cam groove of the second transmission means may extend so as to incline with respect to the circumferential direction around the axis, and bend so that the inclination angle with respect to the circumferential direction continuously changes.
- the cam groove engaging member is moved along the cam groove in a state where the cam groove engaging member is engaged with the cam groove, whereby the ratio of the momentum of the motion transmission destination member to the momentum of the motion transmission source member is transmitted.
- the momentum of the original member it can be continuously increased in a non-linear manner, so that the curve shape of the cam groove sets the suspension spring force characteristics to the desired bounce stroke and rebound stroke. Continuous non-linear characteristics can be set.
- the motion transmission means has a housing that accommodates the input member and the intermediate member, and the intermediate member is fitted to the input member in a state surrounding the input member around the axis, and the input member is And the housing is fitted to the intermediate member so as to surround the intermediate member around the axis, and the intermediate member is rotatably supported around the axis, and the output member is rotated around the axis.
- the first and second transmission means are respectively provided in the intermediate member and are fitted to the housing in a state surrounding the housing and supported by the housing so as to be linearly movable along the axis.
- the cam groove engaging members of the first and second transmission means are provided on the input member and the output member, respectively, and the housing has first and second guide grooves extending along the axis. And the cam groove engaging member of the first transmission means extends radially outward into the first guide groove through the first cam groove and along the first guide groove. The cam groove engaging member of the second transmission means extends radially inward through the second guide groove and into the second cam groove. And may be engaged with the second guide groove so as to be movable along the second guide groove.
- the input member and the output member move linearly along different axes, and the input member, the output member, the intermediate member, and the housing do not fit each other.
- the length of the transmission means in the axial direction can be reduced, and the movement transmission means can be made compact.
- the cam groove engaging members of the first and second transmission means can be surely guided along the axis by the guide groove, so that the guide groove is not provided in the housing.
- the motion conversion between the linear motion of the input member and the rotational motion of the intermediate member and the motion conversion between the rotational motion of the intermediate member and the linear motion of the output member are performed smoothly. be able to.
- the first and second motions are converted along with the motion conversion between the linear motion of the input member and the rotational motion of the intermediate member, and the motion conversion between the rotational motion of the intermediate member and the linear motion of the output member.
- the rate of increase of the momentum ratio in this case may be smaller than the rate of increase of the momentum ratio when the suspension member moves downward from the standard position.
- the rate of increase of the spring force when the wheel bounces is smaller than the rate of decrease of the spring force when the wheel rebounds. Therefore, when the suspension member moves upward and downward from the standard position, the spring force when the wheel rebounds is larger than the case where the magnitude ratio of the momentum ratio is opposite to the above relation. This effectively reduces the rebound acceleration force caused by the vehicle and effectively suppresses changes in body posture during turning and acceleration / deceleration. In addition, it is possible to reduce the drag caused by the spring force when the wheels bounce due to the force from the road surface, and to ensure good riding comfort of the vehicle.
- the rate of increase in the momentum ratio when the suspension member moves upward from the standard position when the suspension movement upward region and the downward movement termination region are observed. It may be larger than the rate of increase in the ratio of the amount of movement when the suspension member moves downward from the standard position.
- one of the input member and the output member may constitute a shock absorber cylinder, and the motion transmission means may incorporate a shock absorber.
- the motion transmission means and the shock absorber can be assembled to the vehicle as a unit, and as a result, the motion transmission means does not have a built-in shock absorber. In addition, it is possible to improve the assembly of the motion transmission means and the shock absorber for the vehicle.
- the suspension spring is disposed in a compressed state between the first and second support members, the output member linearly moves in the direction opposite to the input member, and the output member is the first member.
- a linear motion may be transmitted to the support member.
- the first support member is linearly moved relative to the second support member in the direction opposite to the vertical movement direction of the wheel and the suspension member, thereby the first moment relative to the momentum of the suspension member.
- the ratio of the relative momentum of the second support member can be continuously increased in a non-linear manner as the momentum of the suspension member increases.
- the first support member may be integrated with the output member, and the second support member may be integrated with the input member.
- the number of parts of the suspension can be reduced and the suspension can be easily assembled. Can do.
- the suspension spring is disposed in a compressed state between the first and second support members, the output member linearly moves in the same direction as the input member, and the output member is the second member. A linear motion may be transmitted to the support member.
- the second support member is linearly moved relative to the first support member in the same direction as the vertical movement direction of the wheel and the suspension member, so that the first and The ratio of the relative momentum of the second support member can be continuously increased non-linearly as the momentum of the suspension member increases.
- the first support member may be supported by the vehicle body, and the second support member may be integrated with the output member.
- the number of parts of the suspension can be reduced and the suspension can be easily assembled as compared with the case where the second support member is a member different from the output member.
- the wheel rate may be the smallest when the wheel is in the neutral position, and may gradually increase as the bound stroke and the rebound stroke from the neutral position of the wheel increase.
- the ratio of the momentum of the motion transmission destination member to the momentum of the motion transmission source member is continuously increased as the momentum of the motion transmission source member increases. However, it may be increased non-linearly.
- the increase rate of the ratio of the momentum of the output member to the momentum of the intermediate member due to the increase of the momentum of the input member may be larger than the increase rate of the ratio of the momentum of the intermediate member to the momentum of the input member.
- a plurality of first cam grooves and a plurality of cam groove engaging members may be provided at equal intervals around the axis.
- a plurality of guide grooves spaced at equal intervals around the axis may be provided.
- the rate of increase of the wheel rate with the increase in the wheel bound stroke is determined by looking at the range of the wheel stroke excluding the end region of the wheel bound stroke and the end region of the rebound stroke. May be smaller than the rate of increase of the wheel rate as the rebound stroke of the wheel increases.
- the wheel bounce stroke increases as the wheel bounce stroke increases, and the wheel bounce stroke increases as the wheel bounce stroke increases. It may be larger than the increase rate of the wheel lever accompanying the above.
- the momentum of the suspension member is increased upward from the standard position. Accordingly, the rate of increase in the amount of compressive deformation of the suspension spring may be increased, and the rate of decrease in the amount of compressive deformation of the suspension spring may be increased as the amount of movement of the suspension member downward from the standard position increases.
- first and second cam groove engaging members are fixed to the input member and the output member, respectively, and extend in the radial direction, and the first and second shaft members respectively.
- the first and second cam rollers may be rotatably supported by the shaft member and may be rotatably engaged with the wall surfaces of the first and second cam grooves.
- first and second cam groove engaging members are rotatably supported by the first and second shaft members, respectively, and can roll on the wall surfaces of the first and second guide grooves. There may be a first and a second guider engaged.
- FIG. 1 is an explanatory view showing one embodiment of a suspension of a vehicle according to the present invention configured as a double wishbone type suspension.
- FIG. 2 is a cross-sectional view of the motion transmission device incorporated in the embodiment shown in FIG. 1 cut along two cutting planes that are perpendicular to the axis.
- FIG. 3 is a partial development view showing a cam groove region of the first transmission means of the intermediate rotor of the motion transmission device shown in FIG.
- FIG. 4 is a partial development view showing a cam groove region of the second transmission means of the intermediate rotor of the motion transmission device shown in FIG.
- FIG. 5 is a graph showing the relationship between the linear momentum of the input rotor and the rotational momentum of the intermediate piston in the example.
- FIG. 6 is a graph showing the relationship between the rotational momentum of the intermediate piston and the linear momentum of the output rotor in the example.
- FIG. 7 is a graph showing the relationship between the linear momentum of the input rotor and the linear rotor of the output rotor in the example.
- FIG. 8 is a graph showing the relationship between the wheel stroke and the amount of change in the amount of elastic deformation of the compression coil spring in the example.
- FIG. 9 is an explanatory view showing a conventional general double wishbone suspension.
- Fig. 10 is a wheel of an embodiment and a conventional general double wishbone suspension. It is a graph which shows the relationship between a stroke and wheel rate.
- FIG. 1 is an explanatory view showing one embodiment of a suspension of a vehicle according to the present invention configured as a double wishbone suspension
- FIG. 2 is an axis of a motion transmission device incorporated in the embodiment shown in FIG.
- FIG. 3 is a cross-sectional view of the first transmission device of the intermediate rotor of the motion transmission device shown in FIG.
- FIG. 4 is a partially developed view showing the cam groove region of the second transmission device of the intermediate rotor of the motion transmission device shown in FIG.
- reference numeral 2 generally indicates a suspension constructed according to the present invention and suspending a wheel 4.
- the wheel 4 is supported by a wheel support member 6 so as to be rotatable around a rotation axis 8.
- the suspension shown in FIG. 1 is a double wishbone suspension.
- the outer ends of upper arm 14 and lower arm 16 are pivotally attached to the upper and lower ends of wheel support member 6 by ball joints 10 and 12 respectively.
- the inner ends of the end arm 14 and the lower arm 16 are pivotally attached to the vehicle body 22 by rubber bushing devices 18 and 20 respectively.
- a motion transmission device 20 0 is disposed between the upper arm 16 and the vehicle body 2 2, and the upper and lower ends of the motion transmission device 2 0 0 are respectively connected to the vehicle body 2 2 and the upper mount 26 and the ball joint 2 8. It is pivotally attached to the lower arm 1-6.
- the motion transmission device 200 has a first transmission means 20 2 and a second transmission means 20 4 which are spaced apart from each other along the axis 32.
- the first transmission means 2 0 2 has an input piston 50 that can reciprocate along the axis 3 2 and an intermediate rotor 5 2 that can rotate about the axis 3 2
- the second transmission means 2 0 4 has an intermediate rotor 52 and an output piston 54 that can reciprocate along the axis 32.
- the intermediate rotor 52 is supported by the angular bearings 4 2 A and 4 2 B on the inner side of the housing 56 so as to be rotatable around the axis 3 2 relative to the housing 56.
- the output piston 54 has a cylindrical shape that fits around the housing 56 so as to surround the housing 56, and is supported so as to be reciprocally movable along the axis 32 with respect to the housing 56.
- An end cap 44 is fixed to the upper end of the housing 56 by means such as press fitting, and the end cap 44 is connected to the vehicle body 22 via an upper mount 26 fixed thereto.
- the human-powered biston 50 is fitted into the intermediate rotor 52 and is supported by the housing 56 and the intermediate rotor 52 so as to be able to reciprocate along the axis 3 2 relative to the intermediate rotor 52.
- the motion transmission device 20 0 is a suspension stroke transmission device with a built-in shock absorber, and the input piston 50 has a cylindrical shape opened downward, and the shock absorber
- a bottomed cylindrical cap 60 having an upward opening is fixed to the lower end of the input piston 50 by means such as press-fitting, and a free biston 6 2 has an axis 3 2 in the end cap 60. It is arrange
- Free vistaton 62 cooperates with end cap 60 to define gas chamber 6 4, and high pressure gas is sealed in gas chamber 6 4.
- a C ring 66 is attached to the inner surface of the upper end of the end cap 60, and the C ring 66 prevents the free biston 62 from moving upwards.
- a ball joint 28 is provided at the lower end of the end cap 60.
- the input piston 50 receives the piston 6 8 of the shock absorber 5 8 so that it can reciprocate along the axis 3 2.
- the piston 6 8 cooperates with the input piston 50 to define the cylinder upper chamber 70 and the cylinder lower chamber 72.
- the cylinder upper chamber 70 and the cylinder lower chamber 72 have oil or other A viscous liquid is enclosed.
- the motion transmission device 20.0 is shown in a free state, i.e., no vehicle weight is acting between the upper mount 26 and the input piston 50.
- the piston 68 of the shock absorber 58 is in a state of being stretched with respect to the input piston 50 as a cylinder, and therefore the volume of the cylinder upper chamber 70 is zero.
- a plurality of orifices 74 that connect the cylinder upper chamber 70 and the cylinder lower chamber 72 are provided in the piston portion 6 8 A of the piston 68.
- the rod portion 6 8 B of the piston 68 extends through the end wall of the input piston 50 and extends upward along the axis 32, and is connected to the upper mount 26 at the upper end.
- An O-ring seal 7 6 is arranged between the input piston 50 and the housing 56, and an O-ring seal 7 8 is arranged between the input piston 50 and the rod portion 6 8 B of the piston 68. It is installed.
- an upside-down printer sheet 80 is formed in the body, projecting radially outward and extending around the axis 3 2. Is formed with a low-strer sheet 8 2 projecting radially outward and extending annularly around the axis 3 2.
- a dust boot 8 6 for preventing foreign matter such as dust and muddy water from entering the motion transmission device 200 is disposed outside the motion transmission device 200 and inside the compression coil spring 84. .
- the dust boot 86 is connected to the lower end of the output piston 54 at the upper end and is connected to the lower end of the housing 56 at the lower end.
- the upper end of the housing 56 is provided with a stagger that restricts the upward movement in the drawing of the output piston 54, and therefore the upper spring seat 80. ing.
- the lower arm 16 pivots up and down around its inner end. Therefore, the lower arm 16 is a suspension member that moves up and down by the bounce and rebound of the wheel 4, and the compression coil spring 84 is a suspension spring disposed between the vehicle body 22 and the lower arm 16 as a suspension member. is there. Also, the uppass printer seat 80 is the first support member that supports the end of the suspension spring on the vehicle body 22 side, and the lower spring seat 82 is the end of the suspension spring on the lower arm 16 side. It is the 2nd supporting member to support.
- the first transmission means 20 0 2 is cantilevered by means such as press fitting at the upper end of the input piston 50 0 at a position spaced apart from each other around the axis 3 2 by 180 °, and radially outward. It has a load transfer port 90 extending to The tip of the load transmitting port 90 extends through a force groove 92 provided in the intermediate rotor 52 to a guide groove 94 provided in the cylindrical portion of the housing 56.
- the tip of the load transmitting port 90 supports a substantially spherical guider 98 and a cam roller 100 so as to be rotatable around its own axis 9OA.
- Each guider 98 is rotatably engaged with the wall surface of the corresponding guide groove 94
- each cam roller 100 is rotatably engaged with the wall surface of the cam groove 92.
- the second transmission means 204 is inserted into the lower end portion of the output piston 54 at a position spaced apart from the load transmission port 90 around the axis 32 by 180 °. It has a load transmission port 10 2 that is cantilevered by the means and extends radially inward.
- the tip of the load transmission port 10 2 extends through the guide groove 10 4 provided in the cylindrical part of the housing 56 to the cam groove 10 6 provided in the intermediate rotor 52. Yes.
- the tip end portion of the load transmitting port 10 2 supports a substantially spherical guide roller i 0 8 and a cam roller 1 10 so as to be rotatable around its own axis 10 2 A.
- each guide roller 1 0 8 engages with the wall surface of the corresponding guide groove 10 4 so that it can roll
- each cam roller 1 1 0 engages with the wall surface of the cam groove 1 0 6 so that it can roll.
- 1 1 2 and 1 1 4 indicate reference lines in the direction of the axis 3 2 of the cam grooves 9 2 and 1 0 6 respectively
- 1 1 6 and 1 1 8 indicate the cam grooves 9 respectively.
- the reference line in the circumferential direction of 2 and 1 0 6 is shown.
- the cam groove 9 2 has an S-shape, but as shown in FIG. 4, the cam groove 1 0 6 has an inclination direction opposite to that of the cam groove 9 2.
- the motion transmission device 200 is shown with no compression force applied to it, but the vehicle load is the standard load and the wheel 4 is bound and rebound. Load neutral 9 0 A and 1 0 2 axis 9 0 A and 1 0 2
- A is located at the center standard position of the cam grooves 9 2 and 10 6, that is, at the intersections P 1 and P 2 between the reference lines 1 1 2 and 1 1 4 and the reference lines 1 1 6 and 1 1 8 It is summer.
- the part above the reference line 1 1 6 of the cam groove 9 2 is the part corresponding to the bound stroke of the wheel 2. From the reference line 1 1 6 of the cam groove 9 2 The lower part corresponds to the rebound stroke of wheel 2. On the other hand, the portion above the reference line 1 1 8 of the cam groove 10 6 corresponds to the rebound stroke of the wheel 2, and the portion below the reference line 1 1 8 of the cam groove 1 0 6 corresponds to the wheel 2. This is the part corresponding to the bounce stroke.
- the cam groove 9 2 extends with an inclination with respect to the reference lines 1 1 2 and 1 1 6, and the inclination angle with respect to the reference line 1 1 6 in the circumferential direction as the distance from the intersection P 1 increases. Curved so that gradually decreases.
- the cam groove 9 2 on the bounding side of the wheel 4 has a circumferential reference line 1.
- the inclination angle made to 1 6 is set larger than the inclination angle made by the cam groove 9 2 on the rebound side of the wheel 4 to the circumferential reference line 1 1 6.
- the cam groove 9 2 on the bound side of the wheel 4 has a circumferential reference line 1 1
- the inclination angle formed with respect to 6 is set smaller than the inclination angle formed with respect to the reference line 1 1 6 in the circumferential direction of the cam groove 9 2 on the rebound side of the wheel 4.
- the cam groove 1 0 6 has the same configuration as the cam groove 9 2 reversed with respect to the circumferential reference line 1 1 6 and the curved direction reversed. Therefore, the cam groove 92 is formed in the same form as that rotated about 90 ° counterclockwise around the intersection P1. That is, as shown in FIG. 4, the cam groove 1 0 6 extends in a direction opposite to the cam groove 9 2 with respect to the reference lines 1 1 4 and 1 1 8, and as the distance from the intersection P 2 increases. It is curved so that the inclination angle with respect to the reference line 1 1 6 in the circumferential direction gradually increases.
- the inclination angle formed by the cam groove 1 0 6 on the wheel 4 with respect to the reference line 1 1 8 in the circumferential direction is the wheel 4
- the rebound-side cam groove 1 0 6 is set to be smaller than the angle of inclination with respect to the reference line 1 1 8 in the circumferential direction.
- the cam groove 10 6 on the bouncing side of the wheel 4 becomes the reference line 1 1 8 in the circumferential direction.
- the tilt angle is set larger than the tilt angle formed by the cam groove 10 6 on the rebound side of the wheel 4 with respect to the reference line 1 18 in the circumferential direction.
- the cam roller 10 0 0 moves along the S-shaped motion trajectory that is inclined and curved with respect to the reference lines 1 1 2 and 1 1 6 in the cam groove 9 2 except for the rotational movement around the load transmission port 90. Can only exercise.
- the cam roller 1 1 0 has a curved S-shape that is inclined with respect to the reference lines 1 1 4 and 1 1 8 in the cam groove 1 0 6 except for the rotational movement around the load transmission port 1 0 2. Can move only along the movement trajectory.
- the lower arm 16 is pivoted upward about the inner end due to the wheel 4 bouncing, and the input piston 50 is moved along the axis 3 2 to the intermediate rotor 52 and housing 56.
- the linear motion of the input piston 50 is converted into a rotational motion around the axis 3 2 by the first transmission means 20 2 and transmitted to the intermediate rotor 52.
- the cam grooves 9 2 and 10 6 have a curved U shape as described above, the rotational movement of the intermediate rotor 52 is caused by the linear motion of the input piston 50 by the second transmission means 2 0 4. It is converted into a linear motion in the direction opposite to the direction and transmitted to the output biston 54, whereby the upper spring seat 80 is displaced downward relative to the housing 56.
- the lower arm 16 is pivoted downward around the inner end, and the input piston 50 is lowered relative to the intermediate rotor 52 and the housing 56 along the axis 32.
- the first transmission means in the same manner except that the direction of the rotational movement of the intermediate rotor 52 and the direction of the linear movement of the output piston 54 are opposite to those of the bouncing of the wheels 4.
- the motion conversion and transmission are performed by the 2 0 2 and the second transmission means 2 0 4, and thereby the upside printing sheet 80 is displaced upward relative to the housing 56.
- the lower spring seat 8 2 moves upward as the input piston 50 moves upward, but the upper spring seat 8 0 moves relative to the housing 5 6. Accordingly, the amount of compressive deformation of the compression coil spring 84 increases as compared with the case where the upper spring sheet 80 does not move downward.
- the lower piston seat 8 2 also moves downward as the input biston 50 moves downward, but the Azpass printer seat 8 0 is relative to the housing 56. Accordingly, the amount of reduction in the amount of compressive deformation of the compression coil spring 84 is increased as compared with the case where the bypass printer sheet 80 does not move upward.
- the relationship between the stroke of the wheel 4 and the amount of compressive deformation of the compression coil spring 84 is as shown in FIG. That is, when the wheel 4 bounces, the amount of compression deformation of the compression coil spring 84 increases gradually as the bound stroke from the neutral position of the wheel 4 increases, and the amount of compression deformation of the compression coil spring 84 increases. The rate also increases gradually. When the wheel 4 rebounds, the compression deformation amount of the compression coil spring 8 4 gradually decreases as the rebound stroke from the neutral position of the wheel 4 increases, and the reduction rate of the compression deformation amount of the compression coil spring 8 4 also decreases. Gradually increases. In addition, as can be seen from the comparison between the first and third quadrants in FIG.
- the increase rate of the amount of compressive deformation of the compression coil spring 84 due to this is smaller than the rate of decrease of the amount of compression deformation of the compression coil spring 84 due to the increase of the rebound stroke of the wheel 4.
- the rate of increase in the amount of compressive deformation of the compression coil spring 84 due to the increase in the bounding stroke of the wheel 4 is This is larger than the reduction rate of the amount of compression deformation of the compression coil spring 84 due to the increase of the rebound stroke of the wheel 4.
- the shape of the cam grooves 92 and 106 is appropriately set according to the desired spring characteristics of the suspension, so that the bound stroke and rebound stroke of the wheel 4 can be obtained.
- the linear motion and force can be transmitted from the input piston 50 to the output piston 5 4 with the desired continuous non-linear transmission characteristics over the entire range for any of the first and second suspensions.
- the desired progressive without being restricted by the movement of the link mechanism Spring characteristics can be achieved.
- FIG. 9 shows a conventional general double wishbone type suspension, and members corresponding to those shown in FIG. 1 are given the same reference numerals as those shown in FIG. .
- the suspension spring 1 2 0 is fixed to the upper support 1 2 2 fixed to the upper support 26 attached to the vehicle body 2 2 and the mouth support 1 2 4 attached to the lower arm 1 6. It is outfitted with a roast 1 2 6.
- the lower arm 1 6 pivots up and down around the inner end along with the bounce and rebound of the wheel 4, so the lower seat 1 2 6 also has an arcuate locus centered on the inner end of the lower arm 1 6. Move up and down. Therefore, as the bound stroke and rebound stroke of wheel 4 increase, the ratio of the amount of change in elastic deformation of suspension spring 120 to the increase in stroke of wheel 4 gradually decreases.
- the relationship between the stroke of the wheel 4 and the wheel rate (the spring constant of the spring force of the suspension spring 120 acting on the position of the wheel 4) is shown by a broken line in FIG. It becomes a convex relationship like this.
- the rate of increase in the amount of elastic deformation of the compression coil spring 8 4 gradually increases as the bounding stroke of the wheel 4 increases, and the compression coil spring 8 increases as the rebound stroke of the wheel 4 increases. Since the reduction rate of the elastic deformation amount of 4 gradually increases, the wheel speed can be gradually increased as the stroke of wheel 4 increases for both the bound stroke and rebound stroke of wheel 4. As a result, the relationship between the stroke of the wheel 4 and the wheel rate can be made a downwardly convex relationship as shown by the solid line in FIG. Therefore, the wheel bounce during turning, acceleration / deceleration, driving on rough roads, etc. while ensuring good ride comfort during normal driving compared to conventional suspensions. By reducing the amount of rebound, the change in the posture of the vehicle body can be reduced, and the running stability of the vehicle can be improved.
- the compression coil spring 8 4 accompanying the increase in the bounding stroke of the wheel 4 The rate of increase in the amount of compressive deformation of the wheel is smaller than the rate of decrease in the amount of compressive deformation of the compression coil spring 8 4 as the rebound stroke of the wheel 4 increases. Therefore, the change in the rate of change in the amount of compression deformation of the compression coil spring 8 4 accompanying the increase in the stroke of the wheel 4 is due to the spring force when the wheel rebounds, as compared to the case of the reverse of the relationship in the embodiment.
- the rebound acceleration force is reduced to effectively suppress changes in the posture of the vehicle body during turning and acceleration / deceleration, while reducing the drag caused by the spring force when the wheels bounce due to the force from the road surface. Riding comfort can be ensured.
- the amount of compression deformation of the compression coil spring 8 4 increases as the bound stroke of the wheel 4 increases.
- the rate is larger than the rate of decrease in the amount of compressive deformation of the compression coil springs 8 4 as the rebound stroke of the wheels 4 increases. Therefore, excessive bounce of the wheel can be effectively suppressed, thereby making it possible to downsize or omit the bounce stopper, and when the wheel greatly bounces at a high stroke speed, The shock caused by can be reduced.
- the motion transmission device 200 is a suspension stroke transmission device with a built-in shock absorber, and the input piston 50 functions as a cylinder of the shock absorber 58.
- the compression coil spring 84, the upper spring seat 80, and the lower spring seat 8 2 constitute a unit together with the motion transmission device '2 0 0. If the device does not have a built-in shock absorber, the compression coil spring 8 4, upper spring seat 8 0, lower spring seat 8 2 are the motion transmission device 2 0 0 and one unit. As compared with the case where the motor is not configured, the mounting ability of the motion transmission device, the shock absorber, and the compression coil spring 84 can be improved.
- the input piston 50 as an input member, the intermediate port 52 as an intermediate member, and the output piston 5 4 as an output member are aligned with each other in alignment with the axis 3 2.
- the input member and the output member move linearly along different axes, and the input member or the output member are not fitted to the intermediate member because they are adapted to move relative to the axis 32.
- the first transmission means 2 0 2 and the second transmission means 2 0 4 are provided, and the first transmission means 2 0 2 is along the axis 3 2 of the input piston 5 0.
- the ratio of the rotational momentum of the intermediate rotor 5 2 to the linear momentum is gradually increased as the linear momentum of the input piston 50 is increased.
- the second transmission means 2 0 4 is the output biston 5 4 relative to the rotational momentum of the intermediate rotor 52.
- the first guide groove 94 can be provided for guiding the load transmission rod 90 of the first transmission means 202 along the axis 32, and the second transmission can be provided. Since the second guide groove 10 4 for guiding the load transmission port 10 0 2 of the means 2 0 4 along the axis 3 2 is provided, in the case of a structure without the guide groove In comparison, the rotation of the input piston 50 and the output piston 5 4 around the axis 3 2 can be reliably prevented, so that the straight line between the input piston 50 and the output piston 5 4 can be prevented. The motion and force transmission characteristics can be reliably and accurately set to the desired non-linear characteristics. '
- a plurality of movable members such as the input piston 50 are arranged in alignment with the axis 3 2 and move along or around the axis 3 2. Therefore, the structure of the motion transmission device 200 can be simplified, compared with a structure in which a plurality of movable members are arranged in alignment with different individual axes. Force transmission can be optimized.
- the ratio of the rotational momentum of the intermediate rotor 52 to the linear momentum along the axis 32 of the input piston 50 is calculated by the first transmission means 202 being the linear motion of the input piston 50.
- the ratio of the linear momentum along the axis 3 2 of the output piston 5 4 with respect to the rotational momentum of the intermediate rotor 52 is increased by the second transmission means 2 0 4 as the amount increases.
- the first transmission means 2 0 2 and the second transmission means can be increased by increasing one of the cam grooves 92 and 106 as a straight cam groove, for example. Only one of 204 may be modified so that the ratio of the momentum of the motion transmission destination member to the momentum of the motion transmission source member gradually increases as the momentum of the motion transmission source member increases.
- the cam groove 10 6 has the same form as the cam groove 9 2 rotated about 90 ° counterclockwise around the intersection P 1.
- One transmission means 20 2 gradually increases the ratio of the rotational momentum of the intermediate rotor 52 to the linear momentum along the axis 32 of the input piston 50 as the linear momentum of the input piston 50 increases.
- the rate at which the two transmission means 20 4 gradually increase the ratio of the linear momentum along the axis 3 2 of the output piston 54 to the rotational momentum of the intermediate rotor 52 is the same as the rotational momentum of the intermediate rotor 52 is increased. Certain power These proportions may be different from each other.
- the rate at which the second transmission means 204 gradually increases the ratio of the linear momentum along the axis 32 of the output piston 54 to the rotational momentum of the intermediate rotor 52 as the rotational momentum of the intermediate rotor 52 increases.
- the ratio of the linear momentum along the axis 3 2 of the output piston 5 4 to the linear momentum along the axis 3 2 of the input piston 50 is the same.
- the rotational momentum of the intermediate rotor 52 can be reduced as compared with the case where the two ratios are the same or opposite magnitude relationship.
- the linear motion along the axis 3 of the output piston 5 4 is opposite to the linear motion along the axis 3 2 of the input piston 50, and the output piston 5 4 is designed to reciprocate the uppassing sheet 80, but the linear motion along the axis 3 2 of the output piston 5 4 is the same as the direction of the linear motion along the axis 3 2 of the input piston 50.
- the output piston 5 4 may be modified so as to reciprocate the lower spring seat 82 relative to the upper spring seat 80 substantially attached to the vehicle body 22.
- the motion transmission device 200 is a suspension stroke transmission device with a built-in shock absorber, but the shock absorber is a suspension stroke transmission device and a suspension stroke transmission device. Is an independent suspension member.
- a suspension stroke transmission device may be configured.
- the suspension of the above-described embodiment is a double wishbone type suspension, but the suspension of the present invention is known in the art such as a McFarson Strat type suspension or a training arm type suspension. It can be any type of suspension.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007800453349A CN101557951B (zh) | 2006-12-08 | 2007-11-30 | 车辆的悬架 |
| DE112007002937.4T DE112007002937B4 (de) | 2006-12-08 | 2007-11-30 | Fahrzeugfederung |
| US12/518,215 US8016306B2 (en) | 2006-12-08 | 2007-11-30 | Vehicular suspension |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-332367 | 2006-12-08 | ||
| JP2006332367A JP4797958B2 (ja) | 2006-12-08 | 2006-12-08 | 車両のサスペンション |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008069293A1 true WO2008069293A1 (ja) | 2008-06-12 |
Family
ID=39492168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/073630 Ceased WO2008069293A1 (ja) | 2006-12-08 | 2007-11-30 | 車両のサスペンション |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8016306B2 (ja) |
| JP (1) | JP4797958B2 (ja) |
| CN (2) | CN101927674B (ja) |
| DE (1) | DE112007002937B4 (ja) |
| WO (1) | WO2008069293A1 (ja) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009047404B4 (de) * | 2009-12-02 | 2021-07-29 | Ford Global Technologies, Llc | Radaufhängung |
| WO2013061121A1 (en) * | 2011-10-28 | 2013-05-02 | Softwheel Ltd. | Wheel with suspension system and centralizing unit with suspension system |
| US9108484B2 (en) | 2013-07-25 | 2015-08-18 | Tenneco Automotive Operating Company Inc. | Recuperating passive and active suspension |
| JP6036777B2 (ja) * | 2014-09-25 | 2016-11-30 | トヨタ自動車株式会社 | サスペンション用のインシュレータ |
| JP6493755B2 (ja) * | 2015-06-15 | 2019-04-03 | 清水建設株式会社 | 可変剛性装置及びこれを備えた制振構造物 |
| JP6493754B2 (ja) * | 2015-06-15 | 2019-04-03 | 清水建設株式会社 | 回転慣性質量装置及びこれを備えた制振構造物 |
| DE102015224527A1 (de) * | 2015-12-08 | 2017-06-08 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung zur Höhenverstellung einer Radaufhängung eines Fahrzeugs, Federbein mit einer Vorrichtung zur Höhenverstellung und Fahrzeug mit einer Radaufhängung mit einer Vorrichtung zur Höhenverstellung |
| ITUB20159386A1 (it) * | 2015-12-28 | 2017-06-28 | Piaggio & C Spa | Avantreno di motoveicolo rollante con blocco di rollio |
| US10434835B2 (en) | 2016-02-24 | 2019-10-08 | Tenneco Automotive Operating Company Inc. | Monotube active suspension system having different system layouts for controlling pump flow distribution |
| CN108778789A (zh) * | 2016-03-25 | 2018-11-09 | 标致雪铁龙汽车股份有限公司 | 车辆的液压悬架系统 |
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| JPS59155212U (ja) * | 1983-04-04 | 1984-10-18 | 本田技研工業株式会社 | サスペンシヨンバネの作動荷重調整装置 |
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| JP2005126058A (ja) * | 2003-09-30 | 2005-05-19 | Hitachi Ltd | スタビライザ装置 |
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| DE454730C (de) * | 1926-10-08 | 1928-01-16 | Nordiska Armaturfab Ab | Stossaufnehmungs- und Stossausgleichungsvorrichtung |
| JPS59155212A (ja) * | 1983-02-22 | 1984-09-04 | 株式会社 満尾総合研究所 | 固定装置 |
| JPS6168908A (ja) * | 1984-09-10 | 1986-04-09 | 防衛庁技術研究本部長 | 浮体の運搬車 |
| JPH0671934A (ja) | 1991-08-02 | 1994-03-15 | Ricoh Co Ltd | 電子写真装置 |
| US5820150A (en) * | 1993-04-14 | 1998-10-13 | Oshkosh Truck Corporation | Independent suspensions for lowering height of vehicle frame |
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| GB9802890D0 (en) * | 1998-02-11 | 1998-04-08 | Rover Group | Vehicle suspensions |
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| CA2585262C (en) * | 2004-10-25 | 2014-01-07 | Davis Family Irrevocable Trust, With A Trustee Of Richard Mccown | Compressible fluid independent active suspension |
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-
2007
- 2007-11-30 DE DE112007002937.4T patent/DE112007002937B4/de not_active Expired - Fee Related
- 2007-11-30 WO PCT/JP2007/073630 patent/WO2008069293A1/ja not_active Ceased
- 2007-11-30 CN CN2010102588700A patent/CN101927674B/zh not_active Expired - Fee Related
- 2007-11-30 CN CN2007800453349A patent/CN101557951B/zh not_active Expired - Fee Related
- 2007-11-30 US US12/518,215 patent/US8016306B2/en not_active Expired - Fee Related
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| JPS59155212U (ja) * | 1983-04-04 | 1984-10-18 | 本田技研工業株式会社 | サスペンシヨンバネの作動荷重調整装置 |
| JPS6168908U (ja) * | 1984-10-11 | 1986-05-12 | ||
| JPH03132413A (ja) * | 1989-10-16 | 1991-06-05 | Yorozu:Kk | サスペンション装置 |
| JP2005067386A (ja) * | 2003-08-25 | 2005-03-17 | Hitachi Unisia Automotive Ltd | 車両の操舵制御装置 |
| JP2005126058A (ja) * | 2003-09-30 | 2005-05-19 | Hitachi Ltd | スタビライザ装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112007002937B4 (de) | 2016-07-14 |
| CN101557951B (zh) | 2012-07-18 |
| US20100090433A1 (en) | 2010-04-15 |
| JP2008143339A (ja) | 2008-06-26 |
| US8016306B2 (en) | 2011-09-13 |
| CN101927674B (zh) | 2012-11-21 |
| JP4797958B2 (ja) | 2011-10-19 |
| CN101927674A (zh) | 2010-12-29 |
| CN101557951A (zh) | 2009-10-14 |
| DE112007002937T5 (de) | 2009-10-08 |
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