WO2021152611A1 - Entraînement électrique pour véhicule à plusieurs roues - Google Patents

Entraînement électrique pour véhicule à plusieurs roues Download PDF

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Publication number
WO2021152611A1
WO2021152611A1 PCT/IN2021/050056 IN2021050056W WO2021152611A1 WO 2021152611 A1 WO2021152611 A1 WO 2021152611A1 IN 2021050056 W IN2021050056 W IN 2021050056W WO 2021152611 A1 WO2021152611 A1 WO 2021152611A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
drive
prime mover
trailing arm
assembly
Prior art date
Application number
PCT/IN2021/050056
Other languages
English (en)
Inventor
Ravikanth GOLLAPALLI SURYA GANGADHARA
Nagarjun Reddy Mosali
Murugadoss PANNEERSELVAM
Original Assignee
Tvs Motor Company Limited
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 Tvs Motor Company Limited filed Critical Tvs Motor Company Limited
Priority to PE2022001537A priority Critical patent/PE20221603A1/es
Priority to MX2022008178A priority patent/MX2022008178A/es
Priority to CN202180009690.5A priority patent/CN114981110A/zh
Publication of WO2021152611A1 publication Critical patent/WO2021152611A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle

Definitions

  • the present subject matter relates to a drive assembly. More particularly, the present subject matter relates to an electric drive assembly.
  • the public transport means have become predominant means which include multi wheeled vehicles. Such vehicles are especially used in developing countries as one of the chief modes of transport.
  • the typical public transport is operated day and night on roads and such increasing number of vehicles on road led to many innovations. Improving the comfort and safety of vehicle and also the safety of passengers in public transport is always a big challenge for automobile manufacturers as the increased safety features requires lot of controls and indication which is to be accommodated within defined space.
  • the investment and market viability of the electrical vehicle are growing in a wide range because of high costs of fossils-based fuel and at the same time to be environment-friendly which leads to alternative means of transportation.
  • the alternative means includes electric vehicles, where these vehicle uses motor as prime mover.
  • the electric vehicle is attractive in that the power unit in the form of a rechargeable battery pack is environmentally clean as it does not pollute the air during its operation and its operation is silent. Hence most of the people are buying electrical vehicle for their regular usage. But traction motors must withstand wide temperature ranges as well as shock, vibration and abuse hence placement of motor in optimum location by not making compromise in space for passenger compartment or driver compartment and at the same time ensuring required torque and speed is always a challenge for automobile players.
  • Fig. 1 illustrates detailed isometric view of the drive assembly as per first embodiment of the present invention.
  • Fig. 2 illustrates exploded view of the drive assembly as per first embodiment of the present invention.
  • Fig. 3 illustrates the side cut section view and rear view of the flange as per first embodiment and second embodiment of the present invention.
  • Fig. 4 illustrates rear side cut section view of the drive assembly when viewed from the rear side as per first and second embodiment of the present invention.
  • Fig. 5 illustrates detailed isometric view of the drive assembly as per second embodiment of the present invention.
  • Fig. 6 illustrates exploded view of the drive assembly as per second embodiment of the present invention.
  • Hub motor is one of the promising technologies in automotive electrification.
  • in-wheel hub motor drives are rapidly developing in the area of variable speed drive technologies. They are inherently variable speed drives featuring simple construction, a wide speed range, good efficiency but at the same time the inherent disadvantage of in-wheel hub motors is limited torque delivery to drive wheels independently.
  • the size of in-wheel hub motor should be increased which is undesirable owing to increase in mass, rotating inertia, layout size constraints etc. Therefore, there is trade off by moving the drivetrain mass from the sprung to the unsprung mass and space availability. This increased unsprung mass is often challenged with increased unsprung mass/sprung mass ratio which can result in dangerous, uncomfortable vehicles & driving conditions.
  • in-wheel hub motor leads to increase in the size of the wheel assembly.
  • light weight public transport vehicles wheel assembly size is typically smaller and thus, increased wheel assembly size and addition of components leads to layout constraints in designing a compact low weight power train.
  • the weight of a public transport vehicle & its mileage are additionally critical factors which have to be improved all the time. Any addition to parts, weight, cost, are detrimental & not desired.
  • an improved electric drivetrain layout which is capable of delivering required torque to propel a multi wheel vehicle while overcoming all of the problems cited above & other problems in known arts.
  • an improved electric drive assembly should be implementable with minimal changes in an existing platform layout with minimum modifications of standard frame which support the IC engine powertrain. Furthermore, there should be standardization of parts wherein electric drive can be introduced based on customer needs, manufacturers requirements etc.
  • the present invention relates to the drive assembly for vehicle, which includes a drive wheel operatively connected to the prime mover through drive system.
  • the drive system includes at least one flange and at least one drive axle.
  • the flange is connected to the drive axle through a lock nut, such that the flange and drive axle turns like a single assembly.
  • the drive axle including flange is supported within a housing axle through two bearings.
  • the flange is detachably attached to the prime mover.
  • the drive assembly includes mounting assembly; said mounting assembly supports the prime mover with respect to the frame.
  • the support member connects the prime mover to the trailing arm.
  • the support member adapted to have a second member, wherein said second member is fastened to a first member.
  • the first member is mounted on the trailing arm. Both the first member and second member configured to have predetermined shape with plurality of openings.
  • the present invention is configured with a mounting assembly which includes at least one support member and at least one cross member.
  • the cross member bridges the trailing arm and support member.
  • the trailing arm and support member have plurality of openings in elongated in vehicle longitudinal direction.
  • the cross member is configured with a length adapted to have mount structure to connect with the trailing arm and support member respectively.
  • the cross member may be assembled in different configuration by inserting a plurality of threaded fasteners through openings in each adjacent trailing arm and support member as per different size of the motor.
  • prime mover has been interchangeably used for electric motor throughout the specification in light of scope and spirit of the invention.
  • the vehicle comprises a chassis frame structure (not shown), extending from a front portion (F) to a rear portion (R) along the vehicle longitudinal axis (Y-Y’) ⁇
  • the chassis frame structure (not shown) includes the suspension (104), said suspension (104) includes a spring and a shock absorber unit connected to the chassis frame structure (not shown).
  • the one end of the suspension being connected to at least a portion of the chassis frame structure (not shown) and other end being connected to a trailing arm (103).
  • a hydraulic braking system (107) is attached to drive wheel (101).
  • brake system (107) can be inbuilt in drive wheel (101).
  • the drive assembly (100) includes the drive wheel (101) which is operatively connected to a prime mover (102).
  • the prime mover (102) includes electric motor (102).
  • the trailing arm (103) is pivotally or fixedly attached to the chassis frame structure (not shown) and having a front end (103F) and a rear end (103R), the rear end (103R) of trailing arm is connected to said drive wheel (101) and the front end (103F) of the said trailing arm is connected to the chassis frame structure (not shown).
  • the drive wheel (101) is connected to the prime mover (102) through drive system (105).
  • a mounting assembly (106) is provided which is configured to support the prime mover (102) in respect of the chassis frame structure (not shown).
  • FIG. 2 illustrates exploded view of the drive assembly (100) for the vehicle as per first embodiment of the present invention.
  • the electric motor (102) has two parts: a rotating member (202) called rotor (202) which houses a plurality of permanent magnets mounted inside it.
  • a stationary member (201) called stator (201) containing the stationary copper winding connected to the battery through a controller.
  • stator (201) As per an aspect of the present subject matter, the word stationary member (201) has been interchangeably used for stator (201) of the electric motor (102).
  • the word rotating member (202) has been interchangeably used for rotor (202) of the electric motor (102) throughout the specification in light of scope and spirit of the invention.
  • the drive system (105) includes at least one flange (203) and at least one drive axle (204).
  • the flange (203) which is detachably attached to rotor (202) of the electric motor (102).
  • the drive axle (204) is configured to be detachably attached with the flange (203).
  • the mounting assembly (106) holds the stator (201) of the electric motor (102) and affecting the rotor (202) of the electric motor (102) to rotate the drive wheel (101) through the drive system (105) at a predetermined speed.
  • the mounting assembly (106) includes at least one support member (210) having a front end (21 OF) mounted to the trailing arm (103) and a rear end (21 OR) of the support member (210) is connected to the stationary member (201) of the prime mover (102).
  • the front end (21 OF) of the support member adapted to have a second member (206).
  • a first member (205) is mounted on the trailing arm (103).
  • the first member (205) and second member (206) having predetermined shape.
  • the predetermined shape includes U-shape bracket (205, 206) having plurality of openings (205a, 206a).
  • the second member (206) of support member (210) is detachably attached to the first member (205) by inserting a plurality of threaded fasteners (208) through openings (205a, 206a).
  • the stator (201) of the electric motor (102) configured to have threaded portion (201a) at one of its end.
  • the rear end (21 OR) of the support member (210) consists of the bush (not shown) which is connected to the stator (201) of the motor (102), which restricts all degrees of freedom by the help of the plurality of nuts (209).
  • the first member (205) and second member (206) are configured to have plurality of openings (205a, 206a) such that any change within specified limits in the distance between drive wheel (101) and prime mover (102) can be accommodated by the sliding connection between the flange (203) and the drive axle (204).
  • the first member (205) and second member (206) provided with the plurality of elongated openings (205a, 206a) so as to stabilize and control a vehicle's movement.
  • first member (205) having plurality of openings (205a) is elongated in lateral direction C- C’
  • second member (206) having plurality of openings (206a) elongated in longitudinal direction (Y - Y’)
  • the at least one mounting slot on the first member (205) & the at least one slot on the second member (206) are disposed in an mutually orthogonal direction so as to enable a robust joint.
  • first member (205) and second member (206) is mated using fastening means (208), that includes plurality of nut and bolt (208).
  • the support member (210) is of specific metal profile i.e. rectangular hollow section with a bend which ensures high strength to weight ratio and torsional strength.
  • the support arm (210) is rigidly made to withstand the overhanging weight of the prime mover (102).
  • the mounting assembly (106) is made rigid in a way to withstand the self-weight and additional road loads including bump loads, pot hole loads, sprung mass load and impact loads.
  • Figure 3 illustrates the side cut section view and rear view of the flange (203) as per first and second embodiment of the present invention.
  • the flange (203) is configured to have base portion (301) at one of its end.
  • the base portion (301) is configured to have peripheral holes (300) for connection with the rotating member (202) of the prime mover (102).
  • the base portion (301) of the flange (203) has a predetermined shape and an opening (302, 303, 304) dimensioned to conform to the drive axle (204) and hub (407) of prime mover (102) respectively.
  • the flange (203) configured to have opening (302, 303, 304) extends through the base portion (301) to an axle portion (304) of the flange (203), said opening (302, 303, 304) is sized to mate with the drive axle (204) and a hub (407) (as shown in Fig. 4) of the prime mover (102) to which the flange (203) is to be attached.
  • the hub (407) (as shown in Fig. 4) of the prime mover (102) is seated in hub motor portion (302).
  • the opening (302, 303, 304) includes a lock nut portion (303) to accommodate the locknut (207) (as shown in fig. 2) so as to connect the drive axle
  • FIG. 4 illustrates the rear side cut section view of the drive assembly (100) when viewed from the rear as per preferred embodiment of the present invention.
  • the rotating member (202) of the prime mover (102) is configured to have plurality of retaining studs (404).
  • the base portion (301) of the flange (203) is configured to have peripheral holes (300) for detachably attaching with the rotating member (202) of the prime mover (102).
  • the retaining studs (404) are screwed into the peripheral holes (300) of the base (301) of the flange (203). These retainer studs (404) act to hold the flange (203) in place while plurality of nuts (405) are to fasten the flange (203) to a mating rotating member (202) of the prime mover (102). The drive from the prime mover (102) is transferred from the flange
  • the drive axle (203) can slide inside the splines (304a) provided in the flange (203).
  • the flange (203) is connected to the drive axle
  • the rear end (103R) of the trailing arm is configured to have housing axle (406).
  • the drive axle (204) including flange (203) are supported within the housing axle (406) through at least two bearings (403).
  • the tyre (409) along the tube (410) is mounted over the periphery of the wheel rim (401).
  • the wheel assembly includes tubeless tyre or wheel assembly generally known in art.
  • the drive axle (204) is connected to the hydraulic brake assembly (107) specifically to brake drum as well as to the wheel rim (401) through plurality of nuts and bolts (408) to transfer the drive from prime mover (102) eventually to the drive wheel (101).
  • mounting assembly (106) can also be functionally referred to as counter torque member.
  • the vehicle (not shown) comprises a chassis frame structure (not shown), extending from a front portion (F) to a rear portion (R) along the vehicle longitudinal axis (Y-Y’).
  • the drive assembly (100) includes a drive wheel (101) which is operatively connected to a prime mover (102).
  • the trailing arm (503) configured to have plurality of openings (503a).
  • the pluralities of openings (503a) are extending in longitudinal direction (Y -Y’) of the vehicle.
  • the trailing arm (503) is pivotally or fixedly attached to the chassis frame structure (not shown) and having a front end (503F) and a rear end (503R).
  • the rear end (503R) of trailing arm (503) being connected to the drive wheel (101) and the front end (503F) of the said trailing arm (503) is connected to the chassis frame structure (not shown).
  • the rear end (503R) of the trailing arm (503) is configured to have a housing axle (406) (as shown in Fig. 4).
  • the drive wheel (101) is connected to the prime mover (102) through drive system (105). Further a mounting assembly (504) is provided which is configured to support the prime mover (102) in respect of the chassis frame structure (not shown).
  • FIG 6 illustrates exploded view of the drive assembly (100) for the vehicle as per second embodiment of the present invention.
  • the drive system (105) includes at least one flange (203) and at least one drive axle (204).
  • the flange (203) is detachably attached to rotating member (202) of the prime mover (102).
  • the drive axle (204) is configured to detachably attached with the flange (203).
  • the mounting assembly (504) holds a stationary member (201) of the prime mover (102) and affecting a rotating member (202) of the prime mover (102) to rotate the drive wheel (101) through drive system (105) at a predetermined speed.
  • the mounting assembly (504) includes at least one support member (501) and at least one cross member (502).
  • the cross member (502) of a length is extended in the lateral direction (C-C’) and adapted to have the mount structure (601) at its ends.
  • the mount structure (601) has a predetermined shape.
  • the predetermined shape includes U-shaped structure (601) with plurality of elongated openings (601a).
  • the stator (201) of the electric motor (102) configured to have threaded portion (201a) at one of its end.
  • the one end of the support member (501) is connected to the stationary member (201) of the prime mover (102).
  • the rear end (501R) of the support member (501) consists of a bush (not shown) which is connected to the stator (201) of the motor (102), which restricts all degrees of freedom by the help of the plurality of nuts (209).
  • the cross member (502) bridges the trailing arm (503) and support member (501) where the one end of the cross member (502) is detachably attached to the trailing arm (503) and another end of the cross member (502) is detachably attached to at least portion of the support member (501) which may be assembled in different configuration as per size of prime mover by inserting a plurality of threaded fasteners (602) through openings (503a, 501a) in adjacent trailing arm (503) and support member (501).
  • the U-shaped bracket (601) of the cross member (502) is configured to have elongated openings (601a) such that any change within specified limits in the distance between drive wheel (101) and prime mover (102) can be accommodated by the sliding connection between the flange (203) and the drive axle (204).
  • the support member (501) and trailing arm (503) are provided with the plurality of elongated openings (501a, 503a) so as to stabilize and control a vehicle's movement.
  • the support member (501), trailing arm (503), U-shaped bracket ends (601) are provided with plurality of openings (501a, 503a, 601a) elongated in different directions.
  • the U-shaped bracket (601) having plurality of elongated openings (601a) elongated in lateral direction (C-C’), whereas the support member (501) and trailing arm (503) having the plurality of openings (501a, 503a) elongated in longitudinal direction (Y-Y’).
  • This specific orthogonal alignment of elongated openings in U-shaped bracket (601), trailing arm (503) and support member (501) absorb and deflect a great deal of initial road impacts and/or body movements.
  • the mounting assembly (504) is made rigid in a way to with stand the self-weight and additional road loads (Bump loads, pot hole loads and sprung mass load) and impact loads.
  • the present invention as per second embodiment has the flexibility to change the position of the cross member (502) to ensure that big size motor can be accommodated as per customer or manufacturer requirement.
  • two or more cross member (502) may be assembled in different configuration by inserting a plurality of threaded fasteners (602) through openings in adjacent trailing arm (503) and support member (501).
  • the layout of the drive assembly as outlined in the present invention & the two embodiments enables overcoming all the drawbacks cited earlier & other problems of known arts.
  • the drive assembly reduces the part count and losses due to additional parts during transmission as it is a direct drive where the prime mover debatably attached to the drive wheel through drive system.
  • the drive system has fewer numbers of parts.
  • the direct connection of the motor to the flange makes it possible to avoid problems such as friction losses, imprecise motions, or wear, Hence, present subject matter increases the efficiency of the drive system.
  • the drive assembly can also function as a conversion kit allowing those skilled in vehicle mechanics to perform the conversion.
  • the mounting assembly supports the prime mover such that vehicle maneuverability is greatly increased since the driving power can be quickly and accurately controlled for each wheel independently. Also, plenty of passenger and cargo space can be secured because of the compact and simple design of the drive assembly. [00038] While the present invention has been shown and described with reference to the foregoing preferred embodiments, it will be apparent to those skilled in the art that changes in form, connection, and detail may be made therein without departing from the spirit and scope of the invention like braking system includes disc brake without or without regeneration feature.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

La présente invention concerne un ensemble d'entraînement (100), ledit ensemble d'entraînement (100) étant configuré en un système d'entraînement (105), et un ensemble de montage (106, 504), l'ensemble de montage (106, 504) étant conçu pour supporter le moteur principal (102) par rapport à la structure de châssis. L'ensemble d'entraînement (100) est un kit de conversion permettant aux personnes ayant des compétences en mécanique automobile d'effectuer la conversion.
PCT/IN2021/050056 2020-02-01 2021-01-21 Entraînement électrique pour véhicule à plusieurs roues WO2021152611A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PE2022001537A PE20221603A1 (es) 2020-02-01 2021-01-21 Accionamiento electrico para vehiculo de multiples ruedas
MX2022008178A MX2022008178A (es) 2020-02-01 2021-01-21 Transmision electrica para vehiculo de multiples ruedas.
CN202180009690.5A CN114981110A (zh) 2020-02-01 2021-01-21 用于多轮车辆的电驱动装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041004539 2020-02-01
IN202041004539 2020-02-01

Publications (1)

Publication Number Publication Date
WO2021152611A1 true WO2021152611A1 (fr) 2021-08-05

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ID=74672378

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2021/050056 WO2021152611A1 (fr) 2020-02-01 2021-01-21 Entraînement électrique pour véhicule à plusieurs roues

Country Status (4)

Country Link
CN (1) CN114981110A (fr)
MX (1) MX2022008178A (fr)
PE (1) PE20221603A1 (fr)
WO (1) WO2021152611A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003092142A1 (fr) * 2002-04-23 2003-11-06 Mbn-Maschinenbaubetriebe Neugersdorf Gmbh Systeme d'entrainement electrique destine a un vehicule
US20110259658A1 (en) * 2010-04-22 2011-10-27 Lin Hsiang Huang Power output device for wheeled vehicle
US20160075200A1 (en) * 2014-09-16 2016-03-17 Agco Corporation Progressive rate suspension for agricultural vehicle
WO2019011614A1 (fr) * 2017-07-14 2019-01-17 Robert Bosch Gmbh Véhicule électrique et son ensemble roue
US20190168604A1 (en) * 2017-12-04 2019-06-06 Toyota Jidosha Kabushiki Kaisha Installation structure of in-wheel motor unit
WO2019130904A1 (fr) * 2017-12-29 2019-07-04 ヤマハ発動機株式会社 Véhicule électrique à selle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003092142A1 (fr) * 2002-04-23 2003-11-06 Mbn-Maschinenbaubetriebe Neugersdorf Gmbh Systeme d'entrainement electrique destine a un vehicule
US20110259658A1 (en) * 2010-04-22 2011-10-27 Lin Hsiang Huang Power output device for wheeled vehicle
US20160075200A1 (en) * 2014-09-16 2016-03-17 Agco Corporation Progressive rate suspension for agricultural vehicle
WO2019011614A1 (fr) * 2017-07-14 2019-01-17 Robert Bosch Gmbh Véhicule électrique et son ensemble roue
US20190168604A1 (en) * 2017-12-04 2019-06-06 Toyota Jidosha Kabushiki Kaisha Installation structure of in-wheel motor unit
WO2019130904A1 (fr) * 2017-12-29 2019-07-04 ヤマハ発動機株式会社 Véhicule électrique à selle

Also Published As

Publication number Publication date
CN114981110A (zh) 2022-08-30
MX2022008178A (es) 2022-08-02
PE20221603A1 (es) 2022-10-10

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