Link+Wheel+&+Hub+Overview

Wheel & Hub Test Sytems

LINK WHEEL & HUB TEST SYSTEMS

Link Engineering Company specializes in the design and manufacture of precision test systems and provides comprehensive test services for a wide variety of vehicle components. Headquartered in Plymouth, Michigan, USA, LINK has been serving its customers since 1935. The company maintains offices and test laboratories throughout the world with particular focus on components behind the engine, including wheels, hubs and related rotating components.

The LINK Radial Fatigue Test System is designed to reproduce theradial forces acting on wheels and tires to evaluate their integrity.This roadwheel type machine applies a controllable load to the test wheel through the tire interface with the surface of the roadwheel and inline radially with the center of the test article. Additionally,the rotational axis of both the test article and roadwheel are parallel.The radial load is applied and controlled by means of a servo-electric linear actuation assembly. Tire pressure can be controlled through au-tomatic inflation and deflation systems. The test article must perform a minimum number of test cycleswithout test termination due to fatigue crackingor inability to maintain test load. Strategicallylocated safety switches, along with datamonitoring, provideautomatic machineshutdown uponpart failuredetection.

Model 947 System Features: Electric Ball-Screw Actuators for Precise Radial Load Control

Cooling Air Flow Directed at Test Wheel

Guarding to Protect Surrounding Environment

Fail-safe Annunciator System

System Specifications: Max Load: 4,550 kg (10,000 lbs)

Max Speed: 120 kph (75 mph)

Roadwheel Diameter: 1707 mm (67.23)

Test Stations: Single, Double or Four

Radial Fatigue Machine



The Wheel Impact Test System reproduces impact forces on wheeland drive shaft assemblies. Using the Earths gravitationalpull, incremental dead weights are loaded onto the systemscarriage and dropped to inflict test parts with a specified force,impact speed or total energy. A customized roller bearingdesign is used to minimize total friction in the system,while providing a reliable and accurate method toreproduce impact speeds. The Model 1230 can bedesigned to fit the customers needs in regards tototal height, weight and transducer assemblies.

System Features: High Frequency Laser to Measure Impact Velocity

Piezoelectric Load Sensors to Measure Impact Force

Load vs. Displacement Curves Measured through Impact

Multiple Systems in Place to Satisfy Customer Facility Safety Codes

Fixtures Available for Several Wheel Configurations, Drive Shafts, etc.

Wheel Impact Test System Model 1230 System Specifications: Incremental Deadweight Load: 90 1,35 kg (200 2,500 lbs)

Max Dynamic Impact Loading: 111 kN (25,000 lbs)

Max Impact Speed: 32 kph (20 mph) Conforms to SAE J175 and Other OEM Test Standards

Model 2500


Model 1750

Model 1750 and 2500System Features: Integral Sheaves and Table Brake

T-slotted Plate for Fixture Mounting

Guarding for Rotating Members

Failure Detection System with Annunciator

The LINK Rotary Fatigue Machines are designed to reproducethe forces acting on wheel and brake components as seenin vehicles. They do so by controlling the magnitude ofthe cornering forces consistently to determine theintegrity of the test components. These machines are capableof testing rotors, wheels, bearing packs and axle extendersby mounting the test components vertically to a rotating tableand applying a fixed or varying load while rotating at designatedtest speeds. The machine configuration is designed with the load arm either below or above the test assembly, depending on the preferred loading requirements. Normal procedures call for test completion upon test part failure or once the required numberof rotations has been reached. The load apply system utilizes ahydraulic supply located near the base of the rotary fatiguemachine The fast response servo valve provides controlled load apply during the test.

Model 1750System Specifications: Max Load: 8.9 kN (2,000 lbs)

Load Angle: 90

Max Table Speed: 800 rpm

Max Wheel Size: 559 mm (22)

Model 2500 System Specifications: Max Load: 44.5 kN (10,000 lbs)

Angle Load Adjustment: 45-90

Max Table Speed: 500 rpm

Load Positioning: 0 to 1,140 mm (0 to 45)

Rotary Fatigue Machines

*Additional speed and load options available.


The Model 3536 Biaxial Wheel Tester provides a comprehensivetool to simulate actual driving conditions to perform wheel andhub durability tests in a laboratory environment. It provides testingcapabilities for vehicles from passenger cars to light trucksand SUVs. The wheel assembly is positioned on the interiorof a drum,which is driven through the tireinterface. Servo-electric actuators areutilized to provide the radial and axialforces, as well as the bendingmoments required to recreateloading conditions that occuron the vehicle.

Model 3536 System Specifications: Tire Width: 335 mm maximum

Max Activator Load Forces

Radial +/-40 kN (9,000 lbs) max

Lateral +/-25 kN (5,620 lbs) max

Actuator Strokes & Angle +/-20 max

Speed: 150 kph (93 mph)

System Features:Operation through Electric Servo Motors and Ball Screw Actuators

Elimination of Hydraulic System Reduces Noise and Minimizes Maintenance

Multi-Axis Load Cell Close to the Test Part Reduces Data Transmission Losses

Biaxial Wheel Tester

Model 3928

Model 3546


The Model 3928 Bearing Endurance Test Machine provides asophisticated test system to perform endurance testing on automotivewheel bearings by recreating actual in-service load conditions upon the test components. The control system maintainsa constant or variable load on each bearingassembly while rotating the test parts at userprogrammable test speeds. Simulatedforces are reproduced via a pneumaticallyactuated load apply system. Vehicle routeload cycles can be programmed forautomated simulation.

All primary operating functions are performedat the test station including selection of testparameters, control modes, display of pertinent data,monitoring of all test functions and execution of desired test.Ease of operation combined with accurate and reproduciblemeasurements make the Model 3928 an ideal instrument for control, product development research, or other endurance applications.

The LINK Model 3546 Hub and Wheel Bearing Test System is designed to reproduce the forces acting on wheel bearings as seen in vehicles. It does so by controlling the magnitude of the cornering forces and radial forces. The axial and radial load apply systems utilize hydraulic cylin-ders. The control system maintains a constant force on each load apply system while rotating the test part at the desired test speed. The test is complete when either the test part fails or the required number of rotations is reached. This machine is unique in that water, mud and other slurry mixtures can be sprayed on the bearing during testing. Additionally the test enclosure is thermally insulated for cold weather environmental testing.

Model 3928 System Specifications: 1500 RPM Max Speed

22.2 kN (5,000 lbs) Max Load Apply

1128 m3/hr (13,000 CFM) Max Cooling Airflow

Single or Dual Station

Pneumatic, Hydraulic, or Electric-Actuated Load Control

Model 3546 System Specifications: Max Radial Load: 32 kN (7,195 lbs)

Max Axial Load: 24 kN (5,395 lbs)

Max Speed: 2000 RPM

System Options: Environmental Conditioning Unit: 15C to 150C

Environmental Test Enclosure

Water and Mud Slurry Spray

Cold Water Intrusion Fixture

Hub/Wheel BearingTest System

Model 3546 with Thermaland Spray Systems

Bearing Endurance TestMachine


The LINK Roll Dynamometer is capable to reproduce the radialand side forces acting on aircraft wheels to evaluate their integrity.This road wheel type machine functions by applying a controllableload to the test wheel and tire. Yaw and camber angles can beadjusted to induce side load. The Roll is cast andhardened for capacity to perform Roll-on-Rim testing.Radial load is applied and controlled bymeans of a servo hydraulic cylinder orservo-electric actuator.Tire pressure may becontrolled through aclosed loop inflationand deflation system.The LINK Model 8700complies with ISOand SAE testingstandards for wheeland tire test protocols.

Model 8700 System Specifications: Max Radial Load: 780 kN (175,000 lbs)

Max Side Load: 265 kN (60,000 lbs)

Roll Diameter: 3048 mm (120)

Yaw Angle +/- 25

Optional: Chamber Control +/-20

Optional: 2nd Carriage

Optional Structural Torque Assembly

Aircraft Roll Dynamometer

TESTING SUPPORT

In addition to design and manufacturing,

LINK also offers engineering and testing support

through its global test operations. Headquartered

in North America with strategically placed facilities

across four continents, LINK provides expertise

regarding all aspects of the test execution and

data reporting for both laboratory and full

vehicle testing.

For more information,

contact a LINK representative today.

Information presented in this brochure is for informational purposes only. Link Engineering Company reserves the right to make changes, alterations and substitutions to the machines, components or other information presented in this brochure without prior notice. For the latest information, contact Link Engineering Company. Equipment pictured in this brochure may be shown with safety equipment removed or disabled for purposes of illustration. Equipment must never be operated with safety equipment removed or disabled. For more information, contact LINK at

[email protected] or visit www.linkeng.com

LINK Wheel and Hub Test Systems, along with the rest of its test systems, are operated with ProLink software. Since the late 1990s, LINK

has implemented its ProLink control and data acquisition software on more than 800 pieces

of test equipment around the world. The ad-vanced features of this software package offer

operator dependent control or fully automatic,

unattended operation. ProLink handles machine

operation, data acquisition, post processing and

report generation. The operator only needs to

set up and start the test and the software will

do the rest. ProLink is a major selling point of LINK test systems due to its flexibility to quickly

adapt to the changing needs of the end user.

PROLINK SOFTWARE

Documents

Link+Wheel+&+Hub+Overview