WO2018047056A1 - Frame structure for a two-wheeled vehicle - Google Patents
Frame structure for a two-wheeled vehicle Download PDFInfo
- Publication number
- WO2018047056A1 WO2018047056A1 PCT/IB2017/055319 IB2017055319W WO2018047056A1 WO 2018047056 A1 WO2018047056 A1 WO 2018047056A1 IB 2017055319 W IB2017055319 W IB 2017055319W WO 2018047056 A1 WO2018047056 A1 WO 2018047056A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame structure
- main tube
- members
- vehicle
- frame
- Prior art date
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
- B62K11/02—Frames
- B62K11/10—Frames characterised by the engine being over or beside driven rear wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K19/00—Cycle frames
- B62K19/02—Cycle frames characterised by material or cross-section of frame members
- B62K19/04—Cycle frames characterised by material or cross-section of frame members the material being wholly or mainly metallic, e.g. of high elasticity
- B62K19/06—Cycle frames characterised by material or cross-section of frame members the material being wholly or mainly metallic, e.g. of high elasticity tubular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K25/00—Axle suspensions
- B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
- B62K25/28—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay
- B62K25/283—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay for cycles without a pedal crank, e.g. motorcycles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M7/00—Motorcycles characterised by position of motor or engine
- B62M7/12—Motorcycles characterised by position of motor or engine with the engine beside or within the driven wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K2202/00—Motorised scooters
Definitions
- the present subject matter relates generally to two-wheeled motor vehicles, and more particularly to a frame structure for the two-wheeled motor vehicles.
- a frame assembly acts as a skeleton for the vehicle that supports the vehicle loads.
- the frame assembly is the structural member of the vehicle.
- the frame assembly extends rearward from a head tube towards a rear portion of the vehicle.
- the head tube of the frame assembly supports a front wheel through one or more front suspension(s).
- a rear portion of the frame assembly supports a rear wheel that is connected to a frame assembly through one or more rear suspension(s).
- a power unit includes an internal combustion engine or an electric motor that is functionally connected to the rear wheel, which provides the forward motion to the vehicle.
- plurality of panels is mounted to the frame assembly that covers the frame assembly and various vehicle parts.
- FIG. 1 illustrates a left side view of an exemplary two-wheeled motor vehicle, in accordance with an embodiment of the present subject matter.
- FIG. 2 (a) illustrates a left side perspective view of a frame structure, in accordance with the embodiment depicted in Fig. 1.
- FIG. 2 (b) depicts an enlarged left side view of the frame structure in accordance with the embodiment depicted in Fig. 2 (a).
- FIG. 3 (a) depicts a left side perspective view of a portion of the frame structure, in accordance with another embodiment of the present subject matter.
- Fig. 3 (b) depicts a cross sectional view of main tube taken along axis A- AD , in accordance with the embodiment depicted in Fig. 3 (a).
- Fig. 3 (c) depicts another left side view of a cross-section of the frame structure, in accordance with the embodiment depicted in Fig. 3 (a).
- the power unit is swingably connected to the frame assembly.
- a frame assembly includes a main tube that extends rearwardly downward from a head tube, defining the step-through space.
- the vehicle includes a sub-frame that supports the power unit of the vehicle. A rear wheel is coupled to the power unit and the swinging motion of the power unit is due to the forces acting on the rear wheel.
- the power unit is connected to the frame assembly through a toggle link. Further, the swinging motion of the power unit is transferred to the toggle link, which is pivotally connected to the sub-frame of the frame assembly. In addition, a main tube of the frame assembly restricts the swinging motion of the toggle link beyond a defined range.
- the power unit of the vehicle is packed with various systems including automatic manual transmission, or a liquid cooling system or electronic/electrical control units. This increases the weight of the power unit and also increases forces including vibrations from the power unit transferred to the frame assembly.
- the frame assembly of the vehicle should be capable of having structural rigidity for supporting the power unit and to lower noise vibration harness.
- the frame assembly should be capable of withstanding the forces including vibrations that are transferred from the rear wheel and the power unit.
- the frame structure includes a main tube having a first portion and a second portion.
- the first portion comprises plurality of inner rib members that extend along said first portion therein and the second portion extends substantially from a rear end portion of the main tube.
- the first portion is a tubular member having any known regular or irregular geometrical cross-section.
- the second portion which is the rear end portion, defines a cavity having an opening.
- the plurality of inner rib members disposed therein provides structural rigidity to the frame structure. It is an advantage of the present subject matter that the thickness of the main tube is reduced. This provides rigid and lightweight frame structure with structural rigidity to withstand vehicle loads and to support the power unit. It is another advantage that the need for gussets especially at the bent portion of the main tube is eliminated thereby providing compact frame structure.
- the second portion of the main tube frame structure defines a cavity that is adapted to accommodate at least a portion of the toggle link through which the power unit is connected to the frame structure. It is another aspect of the present subject matter that the first portion and the second portion are supported by a reinforcing member.
- the reinforcing member provides structural strength at point at which change in cross-sectional properties of the first portion and the second portion occurs.
- the reinforcing member is integrated with a cross member disposed in proximity to the reinforcing member whereby additional structural strength is provided.
- the main tube is filled with filling member at gaps defined or formed by the provision of rib members. This enables reduction of noise vibration harshness. Further, the main tube is selectively provided with other structural strengthening materials at the gap.
- the frame structure is made of a rigid material that includes any known metal. It is another aspect of the present subject matter that in another implementation the frame structure is made of a composite material including fiber reinforced by resins. Therefore, it is an advantage of the present subject matter that the frame structure is made of metal or composite material depending on the vehicle performance requirement and cost requirement.
- the frame structure provides a compact yet rigid structural member for the vehicle. It is another advantage of the present subject matter that the vibrations and noise are reduced providing improved ridabilty.
- the main tube with varying cross-section and structural properties is formed by using fiber reinforced polymer/plastic.
- the inner rib members disposed within the first portion of the main tube provide compact yet rigid structure that enables the frame structure to withstand the forces and vibrations from the swinging type power unit being transferred thereof.
- the main tube of the frame structure is capable of supporting one or more cross members extending substantially in a lateral direction of the vehicle.
- a reinforcing portion is provided at a transition portion between the first portion and the second portion.
- the reinforcing portion encloses at least a portion of the first portion and at least a portion of the second portion annularly. This enables distribution and transfer of load within the main tube.
- the plurality of ribs disposed within the first portion extends interconnecting circumferential portions.
- the first portion includes a circular cross-section and the plurality of ribs are extending radially across the circumference.
- the ribs can be plate members disposed or formed within the frame structure.
- the ribs are plurality of tubular members that complement the inner peripheral profile of the main tube.
- the main tube of the frame structure is having circumference substantially equal to the circumference of the conventional main tube in spite of the structural rigidity.
- the first portion is having a quadrilateral cross-section and said plurality of ribs connect at least two sides of the first portion.
- Fig. 1 illustrates a left side view of a two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter.
- the vehicle 100 comprises a frame structure 200, which is a structural member of the vehicle 100.
- a power unit 105 is mounted to the frame structure 200 of the vehicle 100.
- the power unit 105 includes at least one of an internal combustion engine or a traction motor.
- the power unit 105 includes a starter system 110.
- the starter system 110 includes an electric start system, or a mechanical start system that is employed with power unit 105 provided with the IC engine.
- a rear wheel 120 is functionally coupled to the power unit 105.
- the transmission system 115 may include a fixed gear chain drive or a continuously variable transmission (CVT) or an automatic manual transmission (AMT).
- a rear fender 120A covers at least a portion of the rear wheel 120.
- one or more rear suspension(s) 125 functionally connect the rear wheel 120 to the frame structure 200.
- a steering shaft (not shown) is rotatably supported by a head tube (shown in Fig. 2 (a)) of the frame structure 200.
- a handle bar assembly 130 is connected to the steering shaft.
- One or more front suspensions 135 rotatably support a front wheel 140 and connect the front wheel 140 to the steering shaft.
- a front fender 140A covers at least a portion of the front wheel 140.
- a floorboard 145 is disposed at the step-through space ST defined by the frame structure 200 that is supported by the frame structure 200.
- a seat assembly 150 may be supported by at least a portion of the frame structure 200.
- a utility box (not shown) is mounted to the frame structure 200 and the seat assembly 150 is supported by the utility box.
- the vehicle 100 has a front panel 135A disposed upwardly of the front fender 140A.
- a leg shield 135B is disposed rearwardly of the front panel 135 A.
- the front panel 135 A and the leg shield 135B cover at least portion of the frame structure 200 at the front portion of the vehicle 100.
- a below seat cover 135C is being disposed forwardly of the power unit 105 and below the seat assembly 150.
- a pair of rear panels 135D are disposed below the seat assembly, which are extending downwardly and covering at least a portion of the power unit 105.
- the internal combustion engine of the power unit 105 will be supplied with air fuel mixture supplied by a fuel tank (not shown) and an air induction system (not shown) that are coupled through a carburetor or a fuel injection system(not shown).
- the vehicle 100 comprises an auxiliary power source (not shown) that includes a battery or a hydrogen cell or a fuel cell or the like. Further, the traction motor of the power unit 105 is powered by the auxiliary power source mounted to the vehicle 100.
- Fig. 2 (a) illustrates a left side perspective view of a frame structure 200, in accordance with the embodiment depicted in Fig. 1.
- the frame structure 200 comprises a head tube 205 disposed in a front portion FP1 of the vehicle, wherein the head tube 205 pivotally support the steering shaft (not shown).
- the head tube 205 is affixed to the frame structure 200.
- the head tube 205 is integrally formed with the frame structure 200.
- a main tube 210 extends rearwardly downward from the head tube 205, wherein the main tube 210 is defining a step-through space ST (as shown in Fig. 1).
- the main tube 210 extends downwardly of the floorboard 145 (as shown in Fig. 1), supporting the floorboard 145.
- the frame structure 200 further comprises plurality of rear frame members 215 A, 215B that extend inclinedly rearward from a rear portion of the main tube 210.
- the rear frame members 215A, 215B extend from below the floorboard 145, inclinedly rearward towards a rear portion of the vehicle, which is towards the tail lamp 155B (shown in Fig. 1).
- the main tube 210 and the rear frame members 215A, 215B are made of a rigid material.
- the rigid material includes any known metal.
- One or more cross member(s) 220 A, 220B, 220C are provided with the frame structure 200 that are laterally connecting the rear frame members 215 A, 215B.
- a first cross member 220A, a second cross member 220B are disposed at the step-through space ST and the cross members 220A, 220B connect the rear frame members 215 A, 215B to the main tube 210.
- the first cross member 220A and the second cross member 220B provide support to the floorboard 145 (shown in Fig. 1) that is subjected to various loads.
- the frame structure includes one or more rear frame members 215A, 215B having a front portion FP2 extending substantially parallel to a rear end portion of the main tube 210.
- One or more cross members 220A, 220B are provided that connects the main tube 210 and the front portion FP2 of the rear frame members 215A, 215B.
- the main tube 210 comprises plurality of inner rib members 210AA, 210AB (shown in Fig. 2 (a)) that extend along at least a portion of the main tube 210, therein.
- the inner rib members 210AA, 210AB are made of rigid material and provide structural support to the main tube 210.
- the rear frame members 215A, 215B are made of hollow type rigid material.
- the rigid material includes metal.
- the rear frame members 215 A, 215B are provided with pivot provisions 225 for pivotally supporting a toggle link 160.
- the frame structure 200 is adapted to accommodate at least a portion of the toggle link 160.
- the frame structure 200 is provided with a reinforcing member 235 (as shown in Fig. 2 (b)) that supports at least a portion of the first portion 21 OA and at least a portion the second portion 210B.
- the reinforcing member 235 circumferentially supports the main tube 210 at a portion of change in cross-section.
- the reinforcing member 235 is integrally formed with the cross member 220B. This reinforcing member further improves the structural strength of the main tube 210.
- Fig. 2 (b) depicts an enlarged sectional side view of the main tube 210 of the frame structure 200, in accordance with the embodiment depicted in Fig. 2 (a). Also, Fig. 2 (b) depicts the cross-sectional view of the first portion 21 OA taken along axis Y-YD.
- the main tube 210 comprises the first portion 21 OA and the second portion 210B that extends from a rear end portion of the first portion 210A.
- the second portion 210B is disposed adjacent to the first portion 21 OA in the longitudinal direction F-R and are separated by an imaginary line X-XD .
- the first portion 21 OA extends rearwardly downward from a head tube 205 (shown in Fig.
- the main tube 210 is defining a step-through space ST.
- the second portion 210B is extending from the rear end portion of the first portion 21 OA defining a cavity C with an opening OP towards a rear end portion.
- the first portion 21 OA and the second portion 210B are integrally formed.
- a contact portion of the first portion 21 OA with a contact portion of the second portion 210B are having similar cross-section to enable effective load transfer.
- the first portion 210A of the main tube 210 of the frame structure 200 includes plurality of inner rib members 210AA, 210AB that are extending along the first portion 210A of the main tube 210, therein.
- the main tube 210 is a tubular structure and the plurality of inner rib members 210AA, 210AB are tubular structures.
- the plurality of inner rib members are made in the form of layers and an outer layer is provided that acts as the first portion of the main tube.
- the main tube 210 and the plurality of inner rib members 210AA, 210AB are tubular structures made of any know material or multi-material.
- the main tube 210 and the plurality of inner rib members 210AA, 210AB have a regular or an irregular cross-section.
- the first portion is having a quadrilateral shape i.e.
- the rib members 210AA, 210AB form the geometrical square shape. Provision of the inner rib members 210AA, 210AB provides structural rigidity to the main tube 210. Thereby, circumference of the first portion 21 OA is retained, at the same time the section modulus of first portion 21 OA is improved. This improves the load bearing capacity of the frame structure 200 at the same time retaining the compact layout.
- the second portion 210B of the main tube 210 defines a cavity C with an opening OP provided towards a rear end portion and the cavity C is capable of accommodating at least a portion of the toggle link 160 through the opening OP.
- the toggle link 160 is pivotally supported by the rear frame members 215 A, 215B (as shown in Fig. 2 (a)).
- the toggle link 160 includes a first arm 160A and a second arm 160B that extend in forward and rearward directions, respectively, from a pivot axis PA of the toggle link 160.
- the pivot axis PA passes through the pivot provisions 225 provided on the rear frame members 215 A, 215B.
- the second portion 210B enables functional connection of the power unit 105 to the main tube 210 through the toggle link 160.
- Swinging motion of the rear wheel 120 results in swinging of the power unit 105, this in turn results in swinging of the toggle link 160.
- the second portion 210B of the main tube 210 provides a freedom of motion for the first arm 160A of the toggle link 160 to swing within the cavity C defined by second portion 21 OB.
- the toggle link 160 is provided with damping members that reduce transfer of force to the second portion 210B from the toggle link 160.
- the damping members 165 reduce the transfer of vibrations from the power unit 105 to the frame structure 200.
- the damping members are made of an elastic material.
- the first portion 210A is provided with foam member 230A, 230B (depicted as hashed portion), which are filling members that extend along the first portion 210A, therein.
- Fig. 2 (b) represents the gaps Gl, G2 as filling members 230A, 230B, as the gaps Gl, G2 formed by the plurality of ribs 210AA, 210AB.
- a first foam member 230A extends along the first rib member 210AA and a second foam member 230B extends along the second rib member 210AB.
- the foam member 230A, 230B reduces and suppresses the vibrations transferred to the main tube thereby reducing failure of the main tube and also improving ridabilty.
- the cross member 220 A, 220B connects the first portion 21 OA and the second portion 210B thereby providing a structural rigid profile at the step-though portion ST.
- the main tube is filled with lightweight fibers or lightweight polymers to reduce or eliminate any noise that would be generated due to vibration.
- Fig. 3 (a) depicts a left side perspective view of a portion of the frame structure 300, in accordance with another embodiment of the present subject matter.
- Fig. 3 (b) depicts a cross sectional view of main tube taken along axis A- AD, in accordance with the embodiment depicted in Fig. 3 (a).
- the main tube 310 extends rearwardly downward from a main tube (not shown) and defines a step-through space ST.
- the main tube 310 is made of a rigid material, for example a composite material like fiber reinforced plastic or carbon fiber.
- the main tube 310 has plurality of inner rib members 310AA, 310AB that extend along the first portion of the main tube 310, therein.
- the inner rib members 310AA, 310AB are made of composite material.
- the inner rib members 310AA, 310AB are integrally formed with the main tube 310.
- the first portion 310A is having a quadrilateral cross-section with four sides.
- the inner rib member 310AA connects an upper inner peripheral portion with a lower inner peripheral portion.
- another inner rib member 310AB connects the lateral inner peripheral portions. This enables is distribution of load acting on various sides or surfaces of the main tube 210.
- the main tube 310 further comprises a second portion 310B, which defines a cavity C, which extends from a rear portion of the first portion 31 OA of the main tube 310.
- the cavity C has a square cross-section.
- the cavity C can have any regular or irregular geometric cross-section.
- the second portion 310B is adapted to accommodate the first arm 160A of the toggle link 160, wherein the second portion 310B provides freedom of movement for the first arm 160A of toggle link 160.
- the first portion 31 OA along with the inner rib members 310AA, 310AB and the second portion 310B integrally form the frame structure 300.
- the frame structure 300 includes rear frame members 315 that extend rearward from a rear portion of the main tube 310 in an inclined manner. The rear frame members 315 are secured to the main tube 310 through one or more cross members (not shown).
- the main tube 310 is a solid structure provided with foam member therein.
- the first arm 160 A of the toggle link 160 is provided with damping members 165, which are made of an elastic material.
- the damping member 165 comes in contact with an inner peripheral surface of the main tube 310, when the toggle link 160 is either pivotally moving upward or downward direction.
- the damping members 165 further confine the motion of the first arm to a predefined degree. Further, the damping members 165 reduce transfer of any vibrations from the power unit 105 to the rider, thereby improving the ridabilty of the vehicle.
- Fig. 3 (c) depicts another left side view of a cross-section of the frame structure 300, in accordance with the embodiment depicted in Fig. 3 (a).
- the second portion 31 OB of the frame structure 300 confines the swinging motion of the toggle link 160.
- the second portion 310B of the frame structure 300 is integrally formed with the first portion 31 OA that is provided with inner rib members 310AA, 310AB that enable transfer of load/force received by the second portion 310B.
- the frame structure 300 includes a reinforcing member 335 that encloses at least a portion of the first portion 310A and at a least a portion of the second portion 310B.
- the reinforcing member 335 is made of composite material that is affixed to the frame structure 300.
- the reinforcing member 335 is integrally formed with the frame structure 300.
- the reinforcing member 335 of the frame structure 300 provides a rigid support to withstand to the forces and load concentration acting on the second portion 310B. Also, the reinforcing member 335 enables transfer of load between the first portion 31 OA and the second portion 310B.
- the inner rib members 310AA, 310AB of the first portion 31 OA act as ribbed structures providing structural rigidity for supporting various vehicle parts including the toggle link 160. Also, the frame structure 300 enables reduction of vibrations from being transferred to the rider, thereby improving the ridabilty.
- the reinforcing portion 335 is having more than half of the area disposed about the second portion 310B of the main tube 310 thereby providing structural rigidity to said second portion 310B. Further, this enables the second portion 310B with the cavity C to transfer the forces acting thereof through greater area disposed about the second portion 310B.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Automatic Cycles, And Cycles In General (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The present subject matter provides frame structure (200) for a two-wheeled vehicle. The frame structure (200) includes a main tube (210) comprising a first portion (210A) and a second portion (210B). The first portion (210A) extends substantially along a longitudinal direction (F-R) of the vehicle. The second portion (210B) is disposed subsequent to the first portion (210A) in the longitudinal direction (F-R). The first portion (210A) comprises plurality of inner rib members (210AA, 210AB) extending therein along at least a length of the first portion (210A). The second portion (210B) defines a cavity (C) with an opening towards rear end portion adapted to confine pivotal motion of a first arm (160A) of a toggle link (160) thereat.
Description
FRAME STRUCTURE FOR A TWO- WHEELED VEHICLE
TECHNICAL FIELD
[0001] The present subject matter relates generally to two-wheeled motor vehicles, and more particularly to a frame structure for the two-wheeled motor vehicles.
BACKGROUND
[0002] Generally, in a two-wheeled vehicle a frame assembly acts as a skeleton for the vehicle that supports the vehicle loads. Also, the frame assembly is the structural member of the vehicle. The frame assembly extends rearward from a head tube towards a rear portion of the vehicle. The head tube of the frame assembly supports a front wheel through one or more front suspension(s). A rear portion of the frame assembly supports a rear wheel that is connected to a frame assembly through one or more rear suspension(s). A power unit includes an internal combustion engine or an electric motor that is functionally connected to the rear wheel, which provides the forward motion to the vehicle. In addition, plurality of panels is mounted to the frame assembly that covers the frame assembly and various vehicle parts.
BRIEF DESCRIPTION OF THE DRAWINGS
[0003] The detailed description of the present subject matter is described with reference to the accompanying figures. Same numbers are used throughout the drawings to reference like features and components.
[0004] Fig. 1 illustrates a left side view of an exemplary two-wheeled motor vehicle, in accordance with an embodiment of the present subject matter.
[0005] Fig. 2 (a) illustrates a left side perspective view of a frame structure, in accordance with the embodiment depicted in Fig. 1.
[0006] Fig. 2 (b) depicts an enlarged left side view of the frame structure in accordance with the embodiment depicted in Fig. 2 (a).
[0007] Fig. 3 (a) depicts a left side perspective view of a portion of the frame structure, in accordance with another embodiment of the present subject matter.
[0008] Fig. 3 (b) depicts a cross sectional view of main tube taken along axis A- AD , in accordance with the embodiment depicted in Fig. 3 (a).
[0009] Fig. 3 (c) depicts another left side view of a cross-section of the frame structure, in accordance with the embodiment depicted in Fig. 3 (a).
DETAILED DESCRIPTION
[00010] Typically, in a two-wheeled vehicle with a frame assembly defining a step-through space, the power unit is swingably connected to the frame assembly. Typically, such a frame assembly includes a main tube that extends rearwardly downward from a head tube, defining the step-through space. Further, the vehicle includes a sub-frame that supports the power unit of the vehicle. A rear wheel is coupled to the power unit and the swinging motion of the power unit is due to the forces acting on the rear wheel.
[00011] Generally, the power unit is connected to the frame assembly through a toggle link. Further, the swinging motion of the power unit is transferred to the toggle link, which is pivotally connected to the sub-frame of the frame assembly. In addition, a main tube of the frame assembly restricts the swinging motion of the toggle link beyond a defined range. With the advent of technology, the power unit of the vehicle is packed with various systems including automatic manual transmission, or a liquid cooling system or electronic/electrical control units. This increases the weight of the power unit and also increases forces including vibrations from the power unit transferred to the frame assembly.
[00012] Especially, in case of a frame assembly made of materials including fiber-reinforced plastic or the like, the repeated loading of the main tube and the vibrations from the power unit acting on frame assembly results in failure. Further, point(s) at which change in cross-sectional properties of the main tube occurs, such point(s) are subjected to stress concentration resulting in early failure. Generally, thickness of the frame assembly is increased to accommodate the additional weight of the various systems, to support the vehicle parts and to support the power unit. Further, gussets or similar structures are used to further reinforce the frame assembly of the vehicle. This makes the frame assembly bulkier, which defeats the requirement of a compact vehicle layout. Also, the cost of producing such thick frame assembly is also high.
[00013] Therefore, the frame assembly of the vehicle should be capable of having structural rigidity for supporting the power unit and to lower noise vibration harness. Thus, there is a need for providing a frame assembly that is rigid but compact. In addition, the frame assembly should be capable of withstanding the forces including vibrations that are transferred from the rear wheel and the power unit.
[00014] Hence, it is an object of the present subject matter to overcome the aforementioned and other problems by providing a frame structure for the two-wheeled vehicle. The frame structure includes a main tube having a first portion and a second portion. The first portion comprises plurality of inner rib members that extend along said first portion therein and the second portion extends substantially from a rear end portion of the main tube. The first portion is a tubular member having any known regular or irregular geometrical cross-section. The second portion, which is the rear end portion, defines a cavity having an opening.
[00015] It is a feature of the present subject matter that the plurality of inner rib members disposed therein provides structural rigidity to the frame structure. It is an advantage of the present subject matter that the thickness of the main tube is reduced. This provides rigid and lightweight frame structure with structural rigidity to withstand vehicle loads and to support the power unit. It is another advantage that the need for gussets especially at the bent portion of the main tube is eliminated thereby providing compact frame structure.
[00016] It is another feature of the present subject matter that the second portion of the main tube frame structure defines a cavity that is adapted to accommodate at least a portion of the toggle link through which the power unit is connected to the frame structure. It is another aspect of the present subject matter that the first portion and the second portion are supported by a reinforcing member. The reinforcing member provides structural strength at point at which change in cross-sectional properties of the first portion and the second portion occurs.
[00017] In a preferred embodiment, the reinforcing member is integrated with a cross member disposed in proximity to the reinforcing member whereby additional structural strength is provided.
[00018] It is yet another aspect of the present subject matter that the main tube is filled with filling member at gaps defined or formed by the provision of rib members. This enables reduction of noise vibration harshness. Further, the main tube is selectively provided with other structural strengthening materials at the gap.
[00019] It is an aspect of the present subject matter that in one implementation the frame structure is made of a rigid material that includes any known metal. It is another aspect of the present subject matter that in another implementation the frame structure is made of a composite material including fiber reinforced by resins. Therefore, it is an advantage of the present subject matter that the frame structure is made of metal or composite material depending on the vehicle performance requirement and cost requirement.
[00020] It is an advantage of the present matter that the frame structure provides a compact yet rigid structural member for the vehicle. It is another advantage of the present subject matter that the vibrations and noise are reduced providing improved ridabilty.
[00021] It is a feature of the present subject matter that the main tube with varying cross-section and structural properties is formed by using fiber reinforced polymer/plastic.
[00022] It is another feature that the inner rib members disposed within the first portion of the main tube provide compact yet rigid structure that enables the frame structure to withstand the forces and vibrations from the swinging type power unit being transferred thereof.
[00023] Further, the main tube of the frame structure is capable of supporting one or more cross members extending substantially in a lateral direction of the vehicle.
[00024] In one embodiment, a reinforcing portion is provided at a transition portion between the first portion and the second portion. The reinforcing portion
encloses at least a portion of the first portion and at least a portion of the second portion annularly. This enables distribution and transfer of load within the main tube.
[00025] In one implementation, the plurality of ribs disposed within the first portion extends interconnecting circumferential portions. For example, in one embodiment the first portion includes a circular cross-section and the plurality of ribs are extending radially across the circumference. The ribs can be plate members disposed or formed within the frame structure. In one embodiment, the ribs are plurality of tubular members that complement the inner peripheral profile of the main tube.
[00026] It is a feature of the present subject matter that the main tube of the frame structure is having circumference substantially equal to the circumference of the conventional main tube in spite of the structural rigidity.
[00027] In one another implementation, the first portion is having a quadrilateral cross-section and said plurality of ribs connect at least two sides of the first portion.
[00028] The aforesaid and other advantages of the present subject matter would be described in greater detail in conjunction with the figures in the following description.
[00029] Fig. 1 illustrates a left side view of a two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. The vehicle 100 comprises a frame structure 200, which is a structural member of the vehicle 100. A power unit 105 is mounted to the frame structure 200 of the vehicle 100. The power unit 105 includes at least one of an internal combustion engine or a traction motor. In the present embodiment, the power unit 105 includes a starter system 110. Particularly, the starter system 110 includes an electric start system, or a mechanical start system that is employed with power unit 105 provided with the IC engine. Through a transmission system 115, a rear wheel 120 is functionally coupled to the power unit 105. The transmission system 115 may include a fixed gear chain drive or a continuously variable transmission (CVT) or an automatic manual transmission (AMT). A rear fender 120A covers at least a
portion of the rear wheel 120. Further, one or more rear suspension(s) 125 functionally connect the rear wheel 120 to the frame structure 200.
[00030] A steering shaft (not shown) is rotatably supported by a head tube (shown in Fig. 2 (a)) of the frame structure 200. A handle bar assembly 130 is connected to the steering shaft. One or more front suspensions 135 rotatably support a front wheel 140 and connect the front wheel 140 to the steering shaft. A front fender 140A covers at least a portion of the front wheel 140. A floorboard 145 is disposed at the step-through space ST defined by the frame structure 200 that is supported by the frame structure 200. A seat assembly 150 may be supported by at least a portion of the frame structure 200. In an embodiment, a utility box (not shown) is mounted to the frame structure 200 and the seat assembly 150 is supported by the utility box.
[00031] In addition, the vehicle 100 has a front panel 135A disposed upwardly of the front fender 140A. A leg shield 135B is disposed rearwardly of the front panel 135 A. The front panel 135 A and the leg shield 135B cover at least portion of the frame structure 200 at the front portion of the vehicle 100. A below seat cover 135C is being disposed forwardly of the power unit 105 and below the seat assembly 150. A pair of rear panels 135D are disposed below the seat assembly, which are extending downwardly and covering at least a portion of the power unit 105. The internal combustion engine of the power unit 105 will be supplied with air fuel mixture supplied by a fuel tank (not shown) and an air induction system (not shown) that are coupled through a carburetor or a fuel injection system(not shown). The vehicle 100 comprises an auxiliary power source (not shown) that includes a battery or a hydrogen cell or a fuel cell or the like. Further, the traction motor of the power unit 105 is powered by the auxiliary power source mounted to the vehicle 100.
[00032] Furthermore, the vehicle 100 includes various electronic and electrical systems such as a vehicle control unit, an anti-lock braking system (ABS), or a synchronous braking system (SBS). Also, an electrical starter system, a headlamp 155 A, and a tail lamp 155B are provided on said vehicle 100.
[00033] Fig. 2 (a) illustrates a left side perspective view of a frame structure 200, in accordance with the embodiment depicted in Fig. 1. The frame structure 200 comprises a head tube 205 disposed in a front portion FP1 of the vehicle, wherein the head tube 205 pivotally support the steering shaft (not shown). In an embodiment, the head tube 205 is affixed to the frame structure 200. In another embodiment, the head tube 205 is integrally formed with the frame structure 200. Further, a main tube 210 extends rearwardly downward from the head tube 205, wherein the main tube 210 is defining a step-through space ST (as shown in Fig. 1). In the present embodiment, the main tube 210 extends downwardly of the floorboard 145 (as shown in Fig. 1), supporting the floorboard 145. The frame structure 200 further comprises plurality of rear frame members 215 A, 215B that extend inclinedly rearward from a rear portion of the main tube 210. In the depicted embodiment, the rear frame members 215A, 215B extend from below the floorboard 145, inclinedly rearward towards a rear portion of the vehicle, which is towards the tail lamp 155B (shown in Fig. 1). The main tube 210 and the rear frame members 215A, 215B are made of a rigid material. For example, the rigid material includes any known metal.
[00034] One or more cross member(s) 220 A, 220B, 220C are provided with the frame structure 200 that are laterally connecting the rear frame members 215 A, 215B. In the present embodiment, a first cross member 220A, a second cross member 220B are disposed at the step-through space ST and the cross members 220A, 220B connect the rear frame members 215 A, 215B to the main tube 210. Further, the first cross member 220A and the second cross member 220B provide support to the floorboard 145 (shown in Fig. 1) that is subjected to various loads.
[00035] In one embodiment, the frame structure includes one or more rear frame members 215A, 215B having a front portion FP2 extending substantially parallel to a rear end portion of the main tube 210. One or more cross members 220A, 220B are provided that connects the main tube 210 and the front portion FP2 of the rear frame members 215A, 215B.
[00036] The main tube 210 comprises plurality of inner rib members 210AA, 210AB (shown in Fig. 2 (a)) that extend along at least a portion of the main tube 210, therein. In an embodiment, the inner rib members 210AA, 210AB are made of rigid material and provide structural support to the main tube 210. Further, the rear frame members 215A, 215B are made of hollow type rigid material. For example, the rigid material includes metal. The rear frame members 215 A, 215B are provided with pivot provisions 225 for pivotally supporting a toggle link 160. Further, the frame structure 200 is adapted to accommodate at least a portion of the toggle link 160.
[00037] Furthermore, the frame structure 200 is provided with a reinforcing member 235 (as shown in Fig. 2 (b)) that supports at least a portion of the first portion 21 OA and at least a portion the second portion 210B. The reinforcing member 235 circumferentially supports the main tube 210 at a portion of change in cross-section. In a preferred embodiment, the reinforcing member 235 is integrally formed with the cross member 220B. This reinforcing member further improves the structural strength of the main tube 210.
[00038] Fig. 2 (b) depicts an enlarged sectional side view of the main tube 210 of the frame structure 200, in accordance with the embodiment depicted in Fig. 2 (a). Also, Fig. 2 (b) depicts the cross-sectional view of the first portion 21 OA taken along axis Y-YD. The main tube 210 comprises the first portion 21 OA and the second portion 210B that extends from a rear end portion of the first portion 210A. The second portion 210B is disposed adjacent to the first portion 21 OA in the longitudinal direction F-R and are separated by an imaginary line X-XD . The first portion 21 OA extends rearwardly downward from a head tube 205 (shown in Fig. 2 (a)), wherein the main tube 210 is defining a step-through space ST. The second portion 210B is extending from the rear end portion of the first portion 21 OA defining a cavity C with an opening OP towards a rear end portion. In a preferred embodiment, the first portion 21 OA and the second portion 210B are integrally formed. Further, a contact portion of the first portion 21 OA with a contact portion of the second portion 210B are having similar cross-section to enable effective load transfer.
[00039] The first portion 210A of the main tube 210 of the frame structure 200 includes plurality of inner rib members 210AA, 210AB that are extending along the first portion 210A of the main tube 210, therein. In one embodiment, the main tube 210 is a tubular structure and the plurality of inner rib members 210AA, 210AB are tubular structures. For example, in case of the main tube being made of fiber reinforced polymer like carbon fiber, the plurality of inner rib members are made in the form of layers and an outer layer is provided that acts as the first portion of the main tube. The main tube 210 and the plurality of inner rib members 210AA, 210AB are tubular structures made of any know material or multi-material. Further, the main tube 210 and the plurality of inner rib members 210AA, 210AB have a regular or an irregular cross-section. For example, in the depicted embodiment, the first portion is having a quadrilateral shape i.e. square shape, and similarly the rib members 210AA, 210AB form the geometrical square shape. Provision of the inner rib members 210AA, 210AB provides structural rigidity to the main tube 210. Thereby, circumference of the first portion 21 OA is retained, at the same time the section modulus of first portion 21 OA is improved. This improves the load bearing capacity of the frame structure 200 at the same time retaining the compact layout.
[00040] Further, the second portion 210B of the main tube 210 defines a cavity C with an opening OP provided towards a rear end portion and the cavity C is capable of accommodating at least a portion of the toggle link 160 through the opening OP. The toggle link 160 is pivotally supported by the rear frame members 215 A, 215B (as shown in Fig. 2 (a)). Further, the toggle link 160 includes a first arm 160A and a second arm 160B that extend in forward and rearward directions, respectively, from a pivot axis PA of the toggle link 160. The pivot axis PA passes through the pivot provisions 225 provided on the rear frame members 215 A, 215B. The second portion 210B enables functional connection of the power unit 105 to the main tube 210 through the toggle link 160. Swinging motion of the rear wheel 120 results in swinging of the power unit 105, this in turn results in swinging of the toggle link 160. The second portion 210B of the main tube 210 provides a freedom of motion for the first arm 160A of the toggle
link 160 to swing within the cavity C defined by second portion 21 OB. Further, the toggle link 160 is provided with damping members that reduce transfer of force to the second portion 210B from the toggle link 160. Further, the damping members 165 (as shown in Fig. 3 (b)) reduce the transfer of vibrations from the power unit 105 to the frame structure 200. The damping members are made of an elastic material.
[00041] Also, the first portion 210A is provided with foam member 230A, 230B (depicted as hashed portion), which are filling members that extend along the first portion 210A, therein. Fig. 2 (b) represents the gaps Gl, G2 as filling members 230A, 230B, as the gaps Gl, G2 formed by the plurality of ribs 210AA, 210AB. A first foam member 230A extends along the first rib member 210AA and a second foam member 230B extends along the second rib member 210AB. The foam member 230A, 230B reduces and suppresses the vibrations transferred to the main tube thereby reducing failure of the main tube and also improving ridabilty.
[00042] Also, the cross member 220 A, 220B connects the first portion 21 OA and the second portion 210B thereby providing a structural rigid profile at the step-though portion ST.
[00043] In another embodiment, the main tube is filled with lightweight fibers or lightweight polymers to reduce or eliminate any noise that would be generated due to vibration.
[00044] Fig. 3 (a) depicts a left side perspective view of a portion of the frame structure 300, in accordance with another embodiment of the present subject matter. Fig. 3 (b) depicts a cross sectional view of main tube taken along axis A- AD, in accordance with the embodiment depicted in Fig. 3 (a). The main tube 310 extends rearwardly downward from a main tube (not shown) and defines a step-through space ST. In the present embodiment, the main tube 310 is made of a rigid material, for example a composite material like fiber reinforced plastic or carbon fiber. The main tube 310 has plurality of inner rib members 310AA, 310AB that extend along the first portion of the main tube 310, therein. The inner rib members 310AA, 310AB are made of composite material. In a preferred
embodiment, the inner rib members 310AA, 310AB are integrally formed with the main tube 310.
[00045] In the present embodiment, the first portion 310A is having a quadrilateral cross-section with four sides. The inner rib member 310AA connects an upper inner peripheral portion with a lower inner peripheral portion. Similarly, another inner rib member 310AB connects the lateral inner peripheral portions. This enables is distribution of load acting on various sides or surfaces of the main tube 210.
[00046] The main tube 310 further comprises a second portion 310B, which defines a cavity C, which extends from a rear portion of the first portion 31 OA of the main tube 310. In the present embodiment, the cavity C has a square cross-section. However, the cavity C can have any regular or irregular geometric cross-section. The second portion 310B is adapted to accommodate the first arm 160A of the toggle link 160, wherein the second portion 310B provides freedom of movement for the first arm 160A of toggle link 160. The first portion 31 OA along with the inner rib members 310AA, 310AB and the second portion 310B integrally form the frame structure 300. Also, the frame structure 300 includes rear frame members 315 that extend rearward from a rear portion of the main tube 310 in an inclined manner. The rear frame members 315 are secured to the main tube 310 through one or more cross members (not shown).
[00047] In an embodiment, the main tube 310 is a solid structure provided with foam member therein.
[00048] The first arm 160 A of the toggle link 160 is provided with damping members 165, which are made of an elastic material. The damping member 165 comes in contact with an inner peripheral surface of the main tube 310, when the toggle link 160 is either pivotally moving upward or downward direction. The damping members 165 further confine the motion of the first arm to a predefined degree. Further, the damping members 165 reduce transfer of any vibrations from the power unit 105 to the rider, thereby improving the ridabilty of the vehicle.
[00049] Fig. 3 (c) depicts another left side view of a cross-section of the frame structure 300, in accordance with the embodiment depicted in Fig. 3 (a).
The second portion 31 OB of the frame structure 300 confines the swinging motion of the toggle link 160. Also, the second portion 310B of the frame structure 300 is integrally formed with the first portion 31 OA that is provided with inner rib members 310AA, 310AB that enable transfer of load/force received by the second portion 310B.
[00050] Furthermore, the frame structure 300 includes a reinforcing member 335 that encloses at least a portion of the first portion 310A and at a least a portion of the second portion 310B. In a preferred embodiment, the reinforcing member 335 is made of composite material that is affixed to the frame structure 300. In another embodiment, the reinforcing member 335 is integrally formed with the frame structure 300. The reinforcing member 335 of the frame structure 300 provides a rigid support to withstand to the forces and load concentration acting on the second portion 310B. Also, the reinforcing member 335 enables transfer of load between the first portion 31 OA and the second portion 310B. The inner rib members 310AA, 310AB of the first portion 31 OA act as ribbed structures providing structural rigidity for supporting various vehicle parts including the toggle link 160. Also, the frame structure 300 enables reduction of vibrations from being transferred to the rider, thereby improving the ridabilty.
[00051] In one embodiment, the reinforcing portion 335 is having more than half of the area disposed about the second portion 310B of the main tube 310 thereby providing structural rigidity to said second portion 310B. Further, this enables the second portion 310B with the cavity C to transfer the forces acting thereof through greater area disposed about the second portion 310B.
[00052] It is to be understood that the aspects of the embodiments are not necessarily limited to the features described herein. Many modifications and variations of the present subject matter are possible in the light of above disclosure. Therefore, within the scope of claims of the present subject matter, the present disclosure may be practiced other than as specifically described.
Claims
1. A frame structure (200, 300) for a two-wheeled vehicle (100), said two-wheeled vehicle (100) includes a swinging type power unit (105) swingably connected to said frame structure (200) through a toggle link (160), said frame structure (200) includes a main tube (210, 310) comprising a first portion (210A, 310A) and a second portion (210B, 310B), said first portion (210A, 310A) extending substantially along a longitudinal direction (F-R) of said two-wheeled vehicle (100), said second portion (210B, 310B) disposed subsequent to said first portion (210A, 310A) in said longitudinal direction (F-R), said first portion (210A, 310A) comprises plurality of inner rib members (210AA, 210AB, 310AA, 310AB) extending therein along at least a length of said first portion (210A, 31 OA), and said second portion (210B, 310B) defining a cavity (C) with an opening (OP) towards rear end portion is adapted to confine pivotal motion of a first arm (160A) of a toggle link (160) therein.
2. The frame structure (200, 300) as claimed in claim 1, wherein said first portion (21 OA, 31 OA) and said second portion (210B, 310B) of the main tube (210, 310) are integrally formed as a single structure.
3. The frame structure (200) as claimed in claim 1, wherein said plurality of inner rib members (210AA, 210AB) are disposed within the first portion (210A), wherein said first portion (210) supports one or more cross members (220A, 220B) extending substantially in a lateral direction (RH-LH) of said vehicle (100), and said one or more cross members (220A, 220B) support a floor board (145) of said vehicle (100).
4. The frame structure (200) as claimed in claim 1 or 3, wherein said frame structure (200) includes one or more rear frame member (215A, 215B), said one or more cross members (220A, 220B) support a front portion (FP2) of said one or more rear frame members (215A, 215B) that extend substantially parallel to rear end portion of said main tube (210) and said rear frame members (215A, 215B) extend inclinedly rearward towards a rear portion of said vehicle (100).
5. The frame structure (200, 300) as claimed in claim 1, wherein said main tube (210, 310) includes a reinforcing portion (235, 335), wherein said reinforcing
portion (235, 335) encloses at least an outer peripheral portion of said first portion (210A, 310A) and at least a portion of said second portion (210B, 310B).
6. The frame structure (300) as claimed in claim 1 or 5, wherein said reinforcing portion (335) includes more than half area disposed about the second portion (310B) of said main tube (310) thereby providing structural rigidity to said second portion (310B).
7. The frame structure (300) as claimed in claim 1, wherein said plurality of ribs (310AA, 310AB) extending along at least a length of said first portion (310A) are connecting an inner peripheral portions of said main tube (310).
8. The frame structure (200) as claimed in claim 1, wherein the first portion (210A) of the main tube (210) is provided with a filling members (230A, 230B) at gaps (Gl , G2) formed by the plurality of ribs (210AA, 210AB) inside said main tube (210), wherein said filling members (230A, 230B) includes at least one of a foam, a polymer, a fiber reinforced plastic, or a multi-material.
9. The frame structure (200) as claimed in claim 1, wherein said first portion (21 OA) of the main tube (210) supports a head tube (205) being disposed at a front portion (FP1) thereof.
10. The frame structure (300) of claim 1, wherein said main tube (310) is having a quadrilateral cross-section and said plurality of ribs (310AA, 310AB) connects at least two sides of said main tube (310) having quadrilateral cross-section.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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IN201641030358 | 2016-09-06 | ||
IN201641030358 | 2016-09-06 |
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WO2018047056A1 true WO2018047056A1 (en) | 2018-03-15 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/IB2017/055319 WO2018047056A1 (en) | 2016-09-06 | 2017-09-05 | Frame structure for a two-wheeled vehicle |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023181051A1 (en) * | 2022-03-24 | 2023-09-28 | Tvs Motor Company Limited | Toggle link assembly for saddle-type vehicle and saddle-type vehicle thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4887687A (en) * | 1987-06-19 | 1989-12-19 | Honda Giken Kogyo Kabushiki Kaisha | Motorcycle frame |
EP2167367B1 (en) * | 2008-08-01 | 2012-03-28 | Yamaha Hatsudoki Kabushiki Kaisha | Scooter type vehicle |
WO2013111151A2 (en) * | 2011-12-27 | 2013-08-01 | Tvs Motor Company Limited | Vehicle |
-
2017
- 2017-09-05 WO PCT/IB2017/055319 patent/WO2018047056A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4887687A (en) * | 1987-06-19 | 1989-12-19 | Honda Giken Kogyo Kabushiki Kaisha | Motorcycle frame |
EP2167367B1 (en) * | 2008-08-01 | 2012-03-28 | Yamaha Hatsudoki Kabushiki Kaisha | Scooter type vehicle |
WO2013111151A2 (en) * | 2011-12-27 | 2013-08-01 | Tvs Motor Company Limited | Vehicle |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023181051A1 (en) * | 2022-03-24 | 2023-09-28 | Tvs Motor Company Limited | Toggle link assembly for saddle-type vehicle and saddle-type vehicle thereof |
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