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WO2014188889A1 - Butée de suspension - Google Patents

Butée de suspension Download PDF

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Publication number
WO2014188889A1
WO2014188889A1 PCT/JP2014/062497 JP2014062497W WO2014188889A1 WO 2014188889 A1 WO2014188889 A1 WO 2014188889A1 JP 2014062497 W JP2014062497 W JP 2014062497W WO 2014188889 A1 WO2014188889 A1 WO 2014188889A1
Authority
WO
WIPO (PCT)
Prior art keywords
valley
peak
bump stopper
diameter
end side
Prior art date
Application number
PCT/JP2014/062497
Other languages
English (en)
Japanese (ja)
Inventor
一輝 田中
Original Assignee
Nok株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nok株式会社 filed Critical Nok株式会社
Publication of WO2014188889A1 publication Critical patent/WO2014188889A1/fr

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Classifications

    • 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
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
    • F16F1/44—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded mainly in compression
    • 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
    • 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
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
    • F16F1/376—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape having projections, studs, serrations or the like on at least one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B60G2204/4502—Stops limiting travel using resilient buffer

Definitions

  • the present invention relates to a bump stopper for absorbing an impact.
  • Bump stoppers are provided on automobile suspensions to absorb shocks when the car body sinks.
  • the bump stopper is attached to the shock absorber so as to absorb the impact by being compressed.
  • FIG. 5 is a schematic cross-sectional view showing a state when the bump stopper according to the conventional example is compressed.
  • FIG. 5A shows a state where the bump stopper is not compressed
  • FIGS. 5B, 5C, and 5D are schematic sectional views showing the state in which the amount of compression increases in this order. Show.
  • FIG. 5 shows a half cross-sectional view of a cross section obtained by cutting the bump stopper along a plane including the central axis thereof.
  • the bump stopper 500 has an outer peripheral surface configured in a bellows shape so that the deformation state when compressed is stabilized, and a plurality of peaks and valleys are formed on the outer periphery.
  • the first peak portion 511, the first valley portion 521, the second peak portion 512, the second valley portion 522, the third peak portion 513, and the third valley portion 523 are referred to in order from the tip side.
  • the bump stopper 500 is made of polyurethane foam, and can be obtained by mold molding such as injection molding. During molding, when the molding material is filled into the mold cavity, the molding material is filled from the rear end side toward the front end side. Therefore, in consideration of material fluidity at the time of filling, the plurality of crests and troughs are configured such that the diameter becomes smaller toward the tip side. That is, if the diameter of the first peak 511 is D11, the diameter of the second peak 512 is D12, and the diameter of the third peak 513 is D13, then D11 ⁇ D12 ⁇ D13 is satisfied.
  • the diameter of the first valley portion 521 is D21
  • the diameter of the second valley portion 522 is D22
  • the diameter of the third valley portion 523 is D23
  • D21 ⁇ D22 ⁇ D23 is satisfied. Therefore, in the valley, the thickness of the site of the first valley 521 is the thinnest, and the thickness of the site of the third valley 523 is the thickest.
  • the rigidity of the site of the first valley 521 is the lowest, and the rigidity of the site of the third valley 523 is the highest.
  • the bump stopper 500 when the bump stopper 500 is compressed, first, the first valley portion 521 is deformed so as to be compressed (see FIG. 5B), and then the second valley portion 522 is compressed. Deformation (see (c) of the figure). And finally, it deform
  • FIG. 6 is a graph schematically showing the relationship between the compression amount and the load in the bump stopper 500.
  • the spring constant in the compression direction of the entire bump stopper 500 is constant or gradually increases, so that the load is substantially linear as the compression amount increases. (L11 in the graph).
  • part of the 2nd trough part 522 begins to compress, the said spring constant becomes low. Therefore, the ratio of the load increase with respect to the increase in the compression amount decreases (L12 in the graph).
  • the spring constant increases again, and the rate of increase in the load with respect to the increase in the compression amount increases (L13 in the graph). And when the site
  • the bump stopper 500 according to the conventional example is deformed so that the plurality of valley portions are sequentially compressed. For this reason, a phenomenon occurs in which the spring constant is switched stepwise, and the load does not increase smoothly as the compression amount increases, as shown in the graph of FIG. From the viewpoint of absorbing shock, this means that the compression load on the bump stopper 500 does not change smoothly during the process of compressing the bump stopper 500. Therefore, this is a cause of adversely affecting the steering performance of the vehicle.
  • FIG. 7 is a graph showing test results of changes in the spring constant with respect to the compression amount in the bump stopper 500 according to the conventional example. As can be seen from this graph, a phenomenon occurs in which the spring constant is switched in stages.
  • the region L21 in FIG. 7 corresponds to L11 in the graph of FIG. 6, the region L22 in FIG. 7 corresponds to L12 in the graph of FIG. 6, and the region L23 in FIG. 6 corresponds to L13 in the graph of FIG. 6, and a region L24 in FIG. 7 corresponds to L14 in the graph of FIG.
  • An object of the present invention is to provide a bump stopper capable of smoothing an increase in load with respect to an increase in compression amount.
  • the present invention employs the following means in order to solve the above problems.
  • the bump stopper of the present invention is The outer peripheral surface is configured in a bellows shape, and the plurality of peaks and valleys in the bellows shape are each configured as a bump stopper configured such that the diameter becomes smaller toward the tip side.
  • Y ⁇ X is set so as to decrease from the front end toward the rear end. It is characterized by being.
  • each of the plurality of peaks and valleys in the bellows shape is configured to have a smaller diameter toward the tip side.
  • Y ⁇ X increases from the front end side toward the rear end side. It is set to be smaller. Therefore, the nonuniformity of rigidity in each valley is reduced.
  • the compression timing in each valley part can be brought close (preferably simultaneously), and the change of the spring constant with respect to the compression amount of the bump stopper can be suppressed. Therefore, an increase in load with respect to an increase in the compression amount of the bump stopper can be smoothed.
  • the first peak portion in order from the front end side to the rear end side, the first peak portion, the first valley portion adjacent to the first peak portion, and the second peak portion adjacent to the first valley portion.
  • the diameter of the first crest is X1
  • the diameter of the second crest is X2
  • the diameter of the third crest is X3
  • the diameter of the first trough is Y1
  • the diameter of the second trough is Y2
  • the diameter of the third trough When the diameter is Y3, 0.90 ⁇ Y1 ⁇ X1 ⁇ 0.95 0.75 ⁇ Y2 ⁇ X2 ⁇ 0.80 0.70 ⁇ Y3 ⁇ X3 ⁇ 0.75 It is good to satisfy all of the above.
  • FIG. 1 is a partially broken sectional view of a bump stopper according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing a state when the bump stopper according to the embodiment of the present invention is compressed.
  • FIG. 3 is a graph schematically showing the relationship between the compression amount and the load in the bump stopper according to the embodiment of the present invention.
  • FIG. 4 is a graph showing test results of changes in the spring constant with respect to the compression amount in the bump stopper according to the embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view showing a state when the bump stopper according to the conventional example is compressed.
  • FIG. 6 is a graph schematically showing the relationship between the compression amount and the load in the bump stopper according to the conventional example.
  • FIG. 7 is a graph showing test results of changes in the spring constant with respect to the compression amount in the bump stopper according to the conventional example.
  • a bump stopper according to an embodiment of the present invention will be described with reference to FIGS.
  • a case where a bump stopper is attached to a shock absorber provided on a suspension of an automobile will be described as an example.
  • FIG. 2 is a schematic cross-sectional view showing the vicinity of a bump stopper in an automobile suspension.
  • 2A shows a state in which the bump stopper is not compressed
  • FIGS. 2B and 2C show a state in which the compression amount is increased in this order in schematic sectional views.
  • FIG. 2 shows a partial cross-sectional view of a cross section obtained by cutting the bump stopper along a plane including the central axis.
  • the suspension is provided with a shock absorber 200 for suppressing vibration of the vehicle body.
  • the shock absorber 200 is a hydraulic damper type shock absorber including a piston rod 210 and a cylinder 220. When the vehicle body sinks, the piston rod 210 moves toward the inside of the cylinder 220. That is, the shock absorber 200 contracts, and the shock can be absorbed by the hydraulic resistance.
  • a support member 230 is fixed to the piston rod 210, and the bump stopper 100 is attached between the support member 230 and the end surface 221 of the cylinder 220.
  • the bump stopper 100 is an annular member made of polyurethane foam, and is attached to the shock absorber 200 so that the piston rod 210 is inserted into the inner peripheral side thereof.
  • the bump stopper 100 is disposed such that the end surface 140 on the rear end side contacts the support member 230.
  • the bump stopper 100 may or may not be fixed to the support member 230.
  • the bump stopper 100 moves toward the cylinder 220 as the piston rod 210 moves into the cylinder 220.
  • the tip 130 of the bump stopper collides with the end surface 221 of the cylinder 220. Thereby, since the bump stopper 100 is compressed, an impact can be absorbed.
  • the bump stopper 100 according to the present embodiment has an outer peripheral surface configured in a bellows shape so that a deformation state when compressed is stabilized, and a plurality of (annular) peaks and (annular) are formed on the outer periphery. A valley is formed.
  • both the inner peripheral surface and the outer peripheral surface have a bellows shape.
  • the first peak 111, the first valley 121, the second peak 112, the second valley 122, and the third peak 113 are sequentially arranged from the front end side with respect to the plurality of peaks and valleys on the outer peripheral side.
  • the third valley portion 123 1st peak 111 and 1st valley 121, 1st valley 121 and 2nd peak 112, 2nd peak 112 and 2nd valley 122, 2nd valley 122 and 3rd peak 113, 3rd
  • the mountain portion 113 and the third valley portion 123 are adjacent to each other.
  • the tip side is the side that collides with the end surface 221 of the cylinder 220 as described above.
  • the plurality of crests and troughs in the bellows shape are configured such that the diameter becomes smaller toward the tip side.
  • the bump stopper 100 is made of foamed polyurethane, and the viscosity of the molding material supplied into the mold is relatively high. That is, the bump stopper 100 is molded (for example, molding by injection molding) after filling the cavity in the mold with the molding material. In the material filling process at the time of molding, the molding material is filled from the rear end side (of the bump stopper 100) toward the front end side.
  • the molding die is installed so that the front end side of the bump stopper 100 obtained by molding is downward, and the molding material falling by gravity is filled into the cavity from the rear end side toward the front end side. It will be. Therefore, in consideration of the fluidity of the molding material at the time of filling, the diameter of the valley portion on the rear end side (that is, the upper side in the mold) is increased so that the flow of the molding material is not hindered in the cavity. Yes.
  • Y ⁇ X is from the tip side. It is set so as to become smaller toward the rear end side.
  • the diameter of the first peak 111 is X1
  • the diameter of the second peak 112 is X2
  • the diameter of the third peak 113 is X3
  • the diameter of the first valley 121 is Y1
  • the second valley is Y2
  • the diameter of the portion 122 is Y2
  • the diameter of the third valley portion 123 is Y3.
  • the bump stopper 100 is configured such that the diameters of the plurality of crests and troughs in the bellows shape on the outer peripheral surface become smaller toward the tip side. Therefore, the rigidity is inherently lower toward the front end side, and when the bump stopper 100 is compressed, the trough portion is deformed in order from the front end side toward the rear end side.
  • Y ⁇ X is from the front end side. It is set so as to become smaller toward the rear end side. Therefore, the nonuniformity of rigidity in each valley is reduced. Thereby, the timing of compression in each trough part can be approximated.
  • the compression timings in the valleys can be made substantially simultaneously.
  • FIG. 2B shows a state in which the first valley portion 121, the second valley portion 122 portion, and the third valley portion 123 portion have started to be compressed almost simultaneously, and FIG. The state when the amount of compression of each part becomes large is shown.
  • the compression timing of each valley part can be approached (or can be made substantially simultaneously).
  • the bump stopper 100 according to the present embodiment has a characteristic that the load (the load necessary for the compression) increases smoothly as the compression amount increases. From the viewpoint of absorbing the impact, this means that the compressive load on the bump stopper 100 changes smoothly in the process in which the bump stopper 100 is compressed. Therefore, it is possible to suppress adverse effects on the steering performance of the vehicle.
  • FIG. 4 is a graph showing a test result of changes in the spring constant with respect to the compression amount in the bump stopper 100 configured to satisfy all of the above (Expression 1), (Expression 2), and (Expression 3). As can be seen from this graph, it is possible to prevent the spring constant in the compression direction of the entire bump stopper 100 from being switched stepwise.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Dampers (AREA)
  • Springs (AREA)

Abstract

L'invention porte sur une butée de suspension apte à atténuer l'accroissement de charge lorsque le taux de compression augmente. L'invention concerne une butée de suspension (100), dont la surface circonférentielle extérieure présente une forme de soufflet et les multiples sections de crête (première section de crête (111), deuxième section de crête (112), troisième section de crête (113)) et sections de vallée (première section de vallée (121), deuxième section de vallée (122), troisième section de vallée (123)) de la forme de soufflet sont configurées de telle sorte que les diamètres respectifs diminuent vers la pointe, la butée de suspension étant caractérisée en ce que, lorsque le diamètre d'une section de crête est X et le diamètre de la section de vallée adjacente sur le côté d'extrémité de base de ladite section de crête est Y, Y ÷ X est réglé de manière à diminuer de l'extrémité de pointe à l'extrémité de base.
PCT/JP2014/062497 2013-05-22 2014-05-09 Butée de suspension WO2014188889A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013107895A JP2016136027A (ja) 2013-05-22 2013-05-22 バンプストッパ
JP2013-107895 2013-05-22

Publications (1)

Publication Number Publication Date
WO2014188889A1 true WO2014188889A1 (fr) 2014-11-27

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ID=51933452

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/062497 WO2014188889A1 (fr) 2013-05-22 2014-05-09 Butée de suspension

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JP (1) JP2016136027A (fr)
WO (1) WO2014188889A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017154856A1 (fr) * 2016-03-10 2017-09-14 Nok株式会社 Élément d'arrêt absorbant les chocs
JP2021139439A (ja) * 2020-03-05 2021-09-16 日立Astemo株式会社 シリンダ装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04194428A (ja) * 1990-11-27 1992-07-14 Nippon Mektron Ltd バンプストッパー
JPH0874918A (ja) * 1994-09-07 1996-03-19 Tokai Rubber Ind Ltd バンパスプリング
JP2012500372A (ja) * 2008-08-20 2012-01-05 ビーエーエスエフ ソシエタス・ヨーロピア 補助スプリング

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04194428A (ja) * 1990-11-27 1992-07-14 Nippon Mektron Ltd バンプストッパー
JPH0874918A (ja) * 1994-09-07 1996-03-19 Tokai Rubber Ind Ltd バンパスプリング
JP2012500372A (ja) * 2008-08-20 2012-01-05 ビーエーエスエフ ソシエタス・ヨーロピア 補助スプリング

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017154856A1 (fr) * 2016-03-10 2017-09-14 Nok株式会社 Élément d'arrêt absorbant les chocs
CN108603553A (zh) * 2016-03-10 2018-09-28 Nok株式会社 缓冲制动器
JPWO2017154856A1 (ja) * 2016-03-10 2018-11-22 Nok株式会社 緩衝ストッパー
US20190031227A1 (en) * 2016-03-10 2019-01-31 Nok Corporation Shock-absorbing stopper
US10822016B2 (en) 2016-03-10 2020-11-03 Nok Corporation Shock-absorbing stopper
JP2021139439A (ja) * 2020-03-05 2021-09-16 日立Astemo株式会社 シリンダ装置

Also Published As

Publication number Publication date
JP2016136027A (ja) 2016-07-28

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