WO2026018254A1 - Suspension à débit variable en continu - Google Patents

Suspension à débit variable en continu

Info

Publication number
WO2026018254A1
WO2026018254A1 PCT/IN2025/050259 IN2025050259W WO2026018254A1 WO 2026018254 A1 WO2026018254 A1 WO 2026018254A1 IN 2025050259 W IN2025050259 W IN 2025050259W WO 2026018254 A1 WO2026018254 A1 WO 2026018254A1
Authority
WO
WIPO (PCT)
Prior art keywords
bracket
leaf spring
spring assembly
suspension
cup
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.)
Pending
Application number
PCT/IN2025/050259
Other languages
English (en)
Inventor
Krishna Srikanth Achanta
Sanket Prakash Kadale
Sudhanshu Kailash SHUKLA
Suyash GUPTA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ve Commercial Vehicles Ltd
Original Assignee
Ve Commercial Vehicles Ltd
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 Ve Commercial Vehicles Ltd filed Critical Ve Commercial Vehicles Ltd
Publication of WO2026018254A1 publication Critical patent/WO2026018254A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
    • B60G11/34—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs
    • B60G11/38—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also rubber springs
    • B60G11/42—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also rubber springs the rubber springs being attached to sprung part of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/04—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only arranged substantially parallel to the longitudinal axis of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/04—Buffer means for limiting movement of arms
    • 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
    • B60G2202/11—Leaf spring
    • B60G2202/112—Leaf spring longitudinally arranged
    • 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 invention relates to suspension systems provided on commercial vehicles. It more particularly relates to suspension systems utilising leaf springs.
  • the existing conventional rear suspension system of light and medium-duty trucks comes with a semi -elliptical leaf spring in combination with a helper leaf pack.
  • the conventional system has its limitations regarding ride comfort as it works with two-stage stiffness variation, which leads to sudden changes in ride frequency.
  • the helper leaf comes in contact with the helper bracket, it gives a jerky ride. This also results in the degradation of suspension and chassis life as stresses on the leaf spring increase in higher load conditions. Therefore, the maintenance of the conventional system is higher as there are more serviceable parts.
  • an objective of the present invention is to provide a continuously varying rate suspension that can continuously vary its spring stiffness characteristics depending upon loading conditions.
  • It is another objective of the present invention is to provide a continuously varying rate suspension that ensures better ride and comfort as it gives constant ride frequency at various load conditions compared to conventional systems.
  • the continuously varying rate suspension comprises of a foam spring, U-bolts, leaf spring assembly, an asymmetric straddle mounting bracket with u-slots, a frame support bracket, a frame bottom cup bracket, a mounting cup bracket, a shackle and a suspension pin.
  • the foam springs are mounted in a cup provided on the lower surface of the frame bottom cup bracket and the mounting cup bracket.
  • a pair of U-bolts located along the centre of the leaf spring assembly holds two mounting ends of the asymmetric straddle mounting bracket with U-slots on the upper surface of the leaf spring assembly and fastens the asymmetric straddle mounting bracket with U-slots and the spring assembly onto the axle of the vehicle.
  • the frame support backets have a horizontal flat projection that are vertical to their base and that are attached with the vehicle chassis through their base, and the mounting cup brackets through their horizontal flat projection.
  • the shackle links the other end of the leaf spring assembly to a bracket attached to the vehicle chassis through a bush fixed at the other end of said leaf spring assembly.
  • the suspension pin received in the bush provided within in an eye formed at one end of the leaf spring assembly links the one end of the leaf spring assembly to the bracket attached to the vehicle chassis.
  • Figure 1 discloses an isometric view of the suspension as per an embodiment of the present invention.
  • Figure 2 discloses an exploded view of the suspension in accordance with the present invention, as disclosed in Figure 1.
  • Figure 3 discloses a side view of the present invention as installed on the vehicle in its unloaded condition, as disclosed in Figure 2.
  • Figure 4 discloses another side view of the present invention as installed on the vehicle in its loaded condition, as disclosed in Figure 2.
  • a continuously varying rate suspension (100) in accordance with the present invention, comprises of foam spring (10), U-bolts (20), leaf spring assembly (30), an asymmetric straddle mounting bracket with u-slots (40), frame support brackets (50), a frame bottom cup bracket (60), mounting cup brackets (70), a shackle (80), and a suspension pin (90).
  • the foam springs (10) are mounted in a cup provided on the lower surface of the frame bottom cup bracket (60) and the mounting cup bracket (70).
  • a pair of U- bolts (20) located along the centre of the leaf spring assembly (30) holds two mounting ends of the asymmetric straddle mounting bracket with U-slots (40) on the upper surface of the leaf spring assembly (30) and fastens the asymmetric straddle mounting bracket with U-slots (40) and the spring assembly (30) onto the axle of the vehicle.
  • the frame support backet (50) have a horizontal flat projection that are vertical to their base and that is attached with the vehicle chassis through their base, and the mounting cup brackets (70) through their horizontal flat projection.
  • the shackle (80) links the other end of the leaf spring assembly (30) to a bracket attached to the vehicle chassis through a bush fixed at the other end of said leaf spring assembly (30).
  • the suspension pin (90) received in the bush provided within an eye formed at one end of the leaf spring assembly (30) links the one end of the leaf spring assembly (30) to the bracket attached to the vehicle chassis.
  • the foam springs (10) affixed in the cup on the lower surface of the mounting cup brackets (70) that are in turn attached to the frame support brackets (50), are together configured so as to enable the lower end of the foam springs (10) to come to rest on two raised arms of the asymmetric straddle mounting bracket with U-slots (40).
  • the lower surface of the foam springs (10) can come to rest on a touch pad area provided on the two raised arms of the asymmetric straddle mounting bracket with U-slots (40) while the vehicle is being operated.
  • the foam spring (10) affixed in the cup on the lower surface of the frame bottom cup bracket (60) that is in turn attached to the vehicle chassis, are together configured so as to enable the lower end of the foam springs (10) to come to rest against axle of the vehicle.
  • the continuously varying rate suspension (100) has four different mounting brackets for smooth functioning and increased maintainability as the variety of parts decreased by 40%.
  • Each bracket has its own unique functioning in the system.
  • First is the Asymmetric Straddle Mounting bracket with U-slots (40); as it’s mounted on a leaf spring, it acts as a U-bolt clamp, and mainly used as touch pad for side frame-mounted foam springs (10).
  • the Asymmetric Straddle Mounting bracket with U-slots (40) also helps to distribute the load uniformly between foam springs (10) and leaf springs (30).
  • the Asymmetric Straddle Mounting bracket with U-slots (40) has sufficient touch pad area on its two extended arms to avoid foam springs getting offside in all loading conditions after touching, as shown in figure 3 & 4.
  • the Frame Support Bracket (50) provides two functions: one is used for mounting the mounting cup bracket (70), and the other is to provide support to sustain the higher loads.
  • the third one is the mounting cup bracket, which is mounted with the help of a side frame mounting bracket by bolts. Where the cup has a cavity to press, fit the foam spring (10) in such a way that it wouldn’t loose its grip as the continuously varying rate suspension (100) moves in a longitudinal direction after engagement due to shackle (80) movement.
  • the frame bottom cup bracket (60) which is utilized to mount the third foam spring (10) to touch the axle at the same time that the outer foam springs (10) will remain in contact with the axle land area throughout the working region. Therefore, the overall system is easy to maintain and easy to assemble.
  • FIG. 3 shows the continuously varying rate suspension (100) in its unladen condition.
  • the leaf spring assembly (30) which is linked to the vehicle through vehicle mounted brackets located along its either ends via the suspension pin (90) received within the bush provided in the eye formed at its one end and the shackle (80) through the bush fixed at its other end and held together by straps placed at regular intervals on its leaf springs, is in its unloaded condition.
  • the load transfer path is formed by the vehicle chassis, then the vehicle mounted brackets, then the shackle (80) and the suspension pin (90), then the leaf spring assembly (30), and then the vehicle’s axle. This remains the load transfer path until the loading on the vehicle chassis is below a threshold weight i.e. the leaf spring assembly (30) gets deformed beyond a certain threshold extent to allow the foam springs (10) to come into contact with the axle and the touch pad area on the arms of the asymmetric straddle mounting bracket with u-slots (40) respectively.
  • FIG. 4 shows the continuously varying rate suspension (100) in its fully laden condition. This state is achieved when load applied by the chassis has increased beyond a threshold magnitude and the leaf spring assembly (30) has deflected enough to allow the foam springs (10) to respectively come in contact with the axle and the asymmetric straddle mounting bracket with u-slots (40). In this condition, in addition to load transfer path for the unladen condition, there are two additional load transfer paths. The second load transfer path is formed by the vehicle chassis, then the frame support brackets (50), then the mounting cup brackets (70), then the foam springs (10), then the asymmetric straddle mounting bracket with u-slots (40), then the leaf spring assembly (30) and then the vehicle’s axle.
  • the third load transfer path is formed by the vehicle chassis, then the frame bottom cup bracket (60), then the foam spring (10), and then the vehicle’s axle.
  • the laden condition (Refer to Fig. 4) there are four springs (three foam springs (10) and the leaf spring assembly (30)) that are functioning to absorb and later release energy as the vehicle chassis gets loaded and then later unloaded.
  • the resultant effect of providing three load transfer paths is that after the threshold chassis loading is reached and the leaf spring assembly (30) gets sufficiently deformed, the foam springs (10) come into contact with axle and the asymmetric straddle mounting bracket with u-slots (40) respectively.
  • the four springs (three foam springs (10) and the leaf spring Assembly (30)) then start compressing simultaneously, a continuously varying rate (spring rate) is achieved, which gives a better suspension performance and hence a more comfortable ride.
  • the switch between laden and unladen state can take place repeatedly while the vehicle is being operated on a road i.e. getting loaded or unloaded or are encountering road surface irregularities while moving.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

La suspension à débit variable en continu (100), selon la présente divulgation comprend un ressort en mousse (10), des boulons en U (20), un ensemble ressort à lames (30), un support de montage à chevauchement asymétrique doté de fentes en U (40), un support de soutien de cadre (50), un support de coupelle inférieure de cadre (60), un support de coupelle de montage (70), une manille (80), et une broche de suspension (90), et offre un meilleur confort de conduite et une meilleure maniabilité, améliore la durabilité du système de suspension, augmente la capacité de charge utile et le temps de fonctionnement, garantit de faibles niveaux de bruit, de vibrations et de rudesse, est plus légère et est respectueuse de l'environnement, et présente une empreinte carbone inférieure à celle des autres suspensions à ressorts à lames.
PCT/IN2025/050259 2024-07-19 2025-02-20 Suspension à débit variable en continu Pending WO2026018254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202421055149 2024-07-19
IN202421055149 2024-07-19

Publications (1)

Publication Number Publication Date
WO2026018254A1 true WO2026018254A1 (fr) 2026-01-22

Family

ID=98436931

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2025/050259 Pending WO2026018254A1 (fr) 2024-07-19 2025-02-20 Suspension à débit variable en continu

Country Status (1)

Country Link
WO (1) WO2026018254A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4711465A (en) * 1985-07-08 1987-12-08 Raidel John E Suspension system with sway guide
WO2020060393A1 (fr) * 2018-09-17 2020-03-26 Vdl Weweler B.V. Bras longitudinal présentant une tête de marteau pour une suspension d'essieu de roue à ressort pneumatique d'un véhicule

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4711465A (en) * 1985-07-08 1987-12-08 Raidel John E Suspension system with sway guide
WO2020060393A1 (fr) * 2018-09-17 2020-03-26 Vdl Weweler B.V. Bras longitudinal présentant une tête de marteau pour une suspension d'essieu de roue à ressort pneumatique d'un véhicule

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