EP2462419A1 - Galet de roulement en matière plastique pour un banc d'essai de freins pour véhicules automobiles et un tel banc d'essai de freins - Google Patents

Galet de roulement en matière plastique pour un banc d'essai de freins pour véhicules automobiles et un tel banc d'essai de freins

Info

Publication number
EP2462419A1
EP2462419A1 EP10745145A EP10745145A EP2462419A1 EP 2462419 A1 EP2462419 A1 EP 2462419A1 EP 10745145 A EP10745145 A EP 10745145A EP 10745145 A EP10745145 A EP 10745145A EP 2462419 A1 EP2462419 A1 EP 2462419A1
Authority
EP
European Patent Office
Prior art keywords
roller
roller body
test bench
plastic
brake test
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.)
Withdrawn
Application number
EP10745145A
Other languages
German (de)
English (en)
Inventor
Klaus KIRSTÄTTER
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.)
Snap On Equipment SRL
Original Assignee
Snap On Equipment SRL
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 Snap On Equipment SRL filed Critical Snap On Equipment SRL
Publication of EP2462419A1 publication Critical patent/EP2462419A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/0072—Wheeled or endless-tracked vehicles the wheels of the vehicle co-operating with rotatable rolls
    • G01M17/0074—Details, e.g. roller construction, vehicle restraining devices

Definitions

  • the invention relates to a roller for a motor vehicle brake tester and such a brake tester.
  • the invention relates to a roller with a roller body and a brake tester comprising a rolling device for rolling the wheels of the motor vehicle with at least one rotatably mounted roller, a drive unit for driving and braking the unwinding device and a control unit for controlling the drive unit.
  • brake testers are used, for example, to make brake tests on vehicles such as cars and trucks and motorcycles.
  • the wheels of the driven axle of the vehicle to be tested are placed on one or more rotatably mounted rollers. Subsequently, various test cycles are run through in which the braking behavior can be tested.
  • a brake tester is known, for example, from WO 2008/034629 A1.
  • the wheel to be tested is in contact with two driven rollers. These two rollers are used to test the brakes.
  • rollers used in the prior art are made of steel and have a hollow profile.
  • a disadvantage of such steel rollers are high production costs as well as her heavy weight. The latter proves to be disadvantageous, in particular in the final assembly process or maintenance operations.
  • the object of the present invention is therefore to provide a roller for a motor vehicle brake tester which makes it possible to carry out as many tests as possible on a vehicle with the lowest possible cost expenditure. It is another object of the present invention to provide a brake tester with such a roller available.
  • a roller for a motor vehicle brake tester with a roller body wherein the jacket wall of the roller body is at least partially made of plastic, wherein the roller body may be either a hollow cylinder or a solid profile.
  • a trained plastic pulley is very resistant to wear.
  • such a roller has a much lower weight than a steel roller, which has an advantageous effect on the storage of the roller.
  • plastic rollers are low in production due to the low price of raw materials.
  • plastic rollers can be produced in high volumes and in reproducible quality, and manufacturing is easy to automate.
  • the jacket wall of the roller body is completely formed of plastic.
  • the roller is either a circular cylindrical hollow body or a circular cylindrical solid profile, wherein the entire shell wall of the roller body is made of plastic, i. Also a possibly provided profiling is made of plastic.
  • the roller body has a profiled surface.
  • the profiling reduces the possibility of the occurrence of slippage.
  • the so-called slip can occur with low adhesion between the tires and the roller and distort the measurement results inadmissible.
  • the profiled surface may be formed by depressions which are arranged in the surface of the roller body.
  • the profiled surface could additionally or alternatively be formed by elevations which are arranged on the surface of the roller body.
  • the shape of the profiled surface may vary.
  • the depressions and / or elevations may be punctiform or linear.
  • the depressions and / or elevations are, for example, pyramid-shaped, wherein the pyramid has, in particular as a base area, a rhombus, wherein in particular the apex of the pyramid lies above the intersection of the diagonal of the rhombus.
  • these depressions and / or elevations may for example have a semicircular cross-section to optimize the adhesion under different conditions of use.
  • the profiled surface may have any suitable pattern.
  • the profiling can be helical.
  • the helical profile prevents annular areas around the roller without profiling form on which then especially tires with spikes would have no liability.
  • a plurality of helix sections are provided on the surface of the at least one roller, which are in opposite directions and / or have different slopes. This arrangement of the profiling optimum adhesion between the tire and roller is achieved because the tire at any time with a minimum surface of the roller is engaged.
  • the recesses are milled into the surface of the roller body.
  • the roller is made of plastic and then milled in a second step, the wells.
  • rollers without profiling can thus be produced automatically in large numbers and only then can each individual roller be adapted individually to the particular required operating condition.
  • the elevations may be sprayed onto the surface of the roller body. Accordingly, the roller is made of plastic and then sprayed in a second step, the surveys.
  • the recesses and / or elevations are preferably arranged distributed uniformly on the surface.
  • the roll body may be made by injection molding.
  • injection molding the molding compound is melted in a cylinder and then the melt is injected under high pressure into a steel mold. After cooling, the plastic part of the steel mold is removed.
  • the steel mold can be provided with elevations and / or depressions, so that subsequent milling or spraying can be omitted.
  • the roller body may be made by pressing.
  • the molding compound is plastically filled under pressure and / or heat while the mold cavity filled. It is, for example, a thermal molding in a mold under pressure or without pressure.
  • the form may be provided with elevations and / or depressions, so that a subsequent milling or spraying can be omitted.
  • the invention further relates to a brake tester for motor vehicles with a unwinding device for unrolling the wheels of the motor vehicle with at least one rotatably mounted roller, a drive unit for driving and braking the unwinding device, a control unit for controlling the drive unit and a roller of the type mentioned above Advantages are referred to the above explanations.
  • Fig. 1 is a plan view of a roller according to the invention.
  • FIG. 2 is a plan view of a brake tester according to the invention with two rollers according to FIG. 1 1 shows a roller 10 according to the invention, which can be installed in a brake tester 12 according to the invention (see FIG.
  • the roller 10 has a circular cylindrical roller body 11, which is designed either as a solid profile or as a hollow body. From the roller body 11 protrudes a shaft 16 with their ends 18 out. The ends 18 have a portion with a smaller diameter, whereby in each case a shoulder 20 is formed, which serves to support the shaft 16 and thus the roller 10.
  • the shaft 16 is preferably a steel shaft, which is connected in a suitable manner without play with the roller body 11, so that a rotationally fixed connection between the roller body 11 and the shaft 16 is herge- divides.
  • the jacket wall 17 of the roller body 11 is at least partially made of plastic, wherein the type and / or wall thickness (in the embodiment as a hollow profile) of the plastic used are chosen such that it does not deform under the load of a vehicle to be tested.
  • the polymer used is impact resistant in particular.
  • the plastic used is one of the thermoplastics.
  • the jacket wall 17 of the roller body 11 is formed entirely of plastic, wherein the plastic is produced by injection molding.
  • recesses 24 are arranged in the surface 22 of the roller body 11 . These can either be generated during the production of the roller 10 or subsequently be milled into the surface 22.
  • FIG. 2 shows the roller dynamometer 12 according to the invention with the two essentially horizontally running rollers 10.
  • the rollers 10 are aligned axially parallel to each other so that between them a uniformly wide gap 28 is formed.
  • the rollers 10 are mounted in a frame structure, not shown, which also accommodates the bearing units, also not shown.
  • a control unit 32 Connected to the engine is a control unit 32 in which various test programs are stored. According to the vehicle to be tested and / or the test to be performed, a desired program is called, which then controls the drive unit 30 for driving or braking the rollers 10.
  • a vehicle In operation, a vehicle is placed with its driven axle on the two rollers 10.
  • the rollers 10 are rotated by the motor, which is controlled by the corresponding control unit 32 by a preselected program.
  • the thereby also co-rotating wheel of the vehicle can be braked by the brake of the vehicle. From the resistance that the brake of the vehicle opposes the drive of the roller can be closed on the state of the brake.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un galet de roulement pour un banc d'essai de freins pour véhicules automobiles, comprenant un corps de galet de roulement (11), la paroi d'enveloppe (17) du corps de galet de roulement (11) étant constituée au moins en partie en matière plastique. L'invention concerne également un banc d'essai de freins (12) pour des véhicules automobiles équipé d'un tel galet de roulement (10).
EP10745145A 2009-08-04 2010-08-04 Galet de roulement en matière plastique pour un banc d'essai de freins pour véhicules automobiles et un tel banc d'essai de freins Withdrawn EP2462419A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009036009A DE102009036009A1 (de) 2009-08-04 2009-08-04 Kunststoff-Laufrolle für einen Kraftfahrzeug-Bremsprüfstand auf einen solchen Bremsprüfstand
PCT/EP2010/004789 WO2011015354A1 (fr) 2009-08-04 2010-08-04 Galet de roulement en matière plastique pour un banc d'essai de freins pour véhicules automobiles et un tel banc d'essai de freins

Publications (1)

Publication Number Publication Date
EP2462419A1 true EP2462419A1 (fr) 2012-06-13

Family

ID=42985561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10745145A Withdrawn EP2462419A1 (fr) 2009-08-04 2010-08-04 Galet de roulement en matière plastique pour un banc d'essai de freins pour véhicules automobiles et un tel banc d'essai de freins

Country Status (5)

Country Link
US (1) US20120222476A1 (fr)
EP (1) EP2462419A1 (fr)
CN (1) CN102498379A (fr)
DE (1) DE102009036009A1 (fr)
WO (1) WO2011015354A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106289623B (zh) * 2016-07-27 2018-11-30 北京新能源汽车股份有限公司 纯电驱动汽车滑行阻力的测试方法以及系统
DE102021214802A1 (de) 2021-12-21 2023-06-22 Maha Maschinenbau Haldenwang Gmbh & Co. Kg Verfahren zur Oberflächenbearbeitung eines Bauteils eines Kraftfahrzeugprüfstandes und Bauteil eines Kraftfahrzeugprüfstandes

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DE1928242U (de) * 1965-04-24 1965-12-02 Schenck Gmbh Carl Laufrolle fuer fahrzeugpruefstaende, insbesondere fuer bremspruefstaende.
US3490276A (en) * 1968-04-29 1970-01-20 Earl B Maxwell Automobile road testing device
US3982428A (en) * 1975-04-14 1976-09-28 Clayton Manufacturing Company Grooved wheel-contact rollers for vehicle testing apparatus
US4044609A (en) * 1975-07-18 1977-08-30 Clayton Manufacturing Company Wheel-engaging roller structure for vehicle testing apparatus
ATE66740T1 (de) * 1988-04-22 1991-09-15 Schenck Ag Carl Verfahren und vorrichtung zur fuehrung und zum antrieb eines von kraeften beaufschlagten bandantriebs.
FR2701521A1 (fr) * 1993-02-12 1994-08-19 Ledoux Denis Rouleau à revêtement interchangeable pour freinomètre.
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DE19549298C2 (de) * 1995-12-22 1998-04-23 Berliner Verkehrs Betriebe Bvg Beschichtungssystem für abgenutzte, in Bremsprüfständen angeordnete Laufrollen und Verfahren zu ihrer Ausbesserung
DE19755725C2 (de) * 1997-12-15 1999-10-28 Ticona Gmbh Drehbewegliche Kunststoffrollen
CN1279397A (zh) * 1999-07-02 2001-01-10 浙江省丽水地区公安局交通警察支队 汽车制动力试验滚筒的制作方法及产品
US6405586B1 (en) * 2000-01-31 2002-06-18 Marc W. Salvisberg Dynamometer roller
WO2002055979A1 (fr) * 2001-01-15 2002-07-18 Siemens Aktiengesellschaft Banc d'essai de vehicule
DE20110653U1 (de) * 2001-06-27 2001-08-30 Avl Zoellner Gmbh Laufrolle für Fahrzeugprüfstände
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EP2084507B1 (fr) 2006-09-21 2012-04-04 Snap-on Equipment Srl a unico socio Banc d'essai à rouleaux et cylindre pour ce banc d'essai
CN201023961Y (zh) * 2007-04-07 2008-02-20 谷明山 皮带输送机托辊
KR101629528B1 (ko) * 2008-09-08 2016-06-21 버크 이. 포터 머쉬너리 컴퍼니 차량 검사 조립체
EP2487477B1 (fr) * 2011-02-10 2015-05-13 Snap-on Equipment Srl a unico socio Banc d'essai de frein

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Title
See references of WO2011015354A1 *

Also Published As

Publication number Publication date
CN102498379A (zh) 2012-06-13
DE102009036009A1 (de) 2011-04-07
US20120222476A1 (en) 2012-09-06
WO2011015354A1 (fr) 2011-02-10

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