Four-wheel industrial truck with a swing axle

• US 20040108663A1
• Filed: 12/01/2003
• Published: 06/10/2004
• Est. Priority Date: 12/04/2002
• Status: Active Grant

• Current Assignee: Jungheinrich AG
• Original Assignee: Jungheinrich AG
• Inventors: Rickers, Paul
• Granted Patent: US 7,137,473 B2
• Time in Patent Office: Days
• US Class Current: 280/6.154
• CPC Class Codes: B60G 17/0162 mainly during a motion involving steering operation, e.g. cornering, overtaking B60G17/0164 takes precedence
• CPC Class Codes: B60G 17/0195 characterised by the regulation being combined with other vehicle control systems conjoint control of vehicle sub-units including control of suspension systems B60W10/22
• CPC Class Codes: B60G 2200/322 with a single pivot point and a straight axle
• CPC Class Codes: B60G 2204/112 on dampers, e.g. fluid dampers
• CPC Class Codes: B60G 2204/45 Stops limiting travel
• CPC Class Codes: B60G 2204/62 Adjustable continuously, e.g. during driving
• CPC Class Codes: B60G 2300/026 Heavy duty trucks
• CPC Class Codes: B60G 2400/0511 Roll angle
• CPC Class Codes: B60G 2400/104 lateral or transversal with regard to vehicle
• CPC Class Codes: B60G 2400/204 Vehicle speed
• CPC Class Codes: B60G 2400/208 of wheel rotation
• CPC Class Codes: B60G 2400/32 Torque on propulsion shaft
• CPC Class Codes: B60G 2400/61 Load distribution
• CPC Class Codes: B60G 2401/14 Photo or light sensitive means, e.g. Infrared
• CPC Class Codes: B60G 2401/174 Radar
• CPC Class Codes: B60G 2401/176 Radio or audio sensitive means, e.g. Ultrasonic
• CPC Class Codes: B60G 2800/012 Rolling condition
• CPC Class Codes: B60G 2800/0124 Roll-over conditions
• CPC Class Codes: B60G 2800/224 automatically, based on dangerous living style
• CPC Class Codes: B60G 2800/24 Steering, cornering
• CPC Class Codes: B60G 2800/922 : EBV - Electronic brake force distribution
• CPC Class Codes: B60G 2800/97 : Engine Management System [EMS]
• CPC Class Codes: B60G 9/02 : the axle or housing being pivotally mounted on the vehicle , e.g. the pivotal axis being parallel to the longitudinal axis of the vehicle B60G9/003 takes precedence
• CPC Class Codes: B66F 17/003 : for fork-lift trucks
• CPC Class Codes: B66F 9/07586 : Suspension or mounting of wheels on chassis

Abstract

A four-wheel industrial truck with a swing axle for the rear wheels, a drive, and a control device for said drive that generates an actuating signal for the drive in response to a transducer signal wherein a stop is provided on the bodywork of the industrial truck that cooperates with the body of the swing axle, characterized in that a switch is arranged on the axle stop and the switch is coupled to the control device so as to reduce the drive torque of the drive when the switch is actuated.

Claims

1. A four-wheel industrial truck with a swing axle for the rear wheels, a drive, and a control device for said drive that generates an actuating signal for the drive in response to a generator signal wherein a stop is provided on the bodywork of the industrial truck that cooperates with the body of the swing axle, characterized in that a switch is arranged on the axle stop (28, 30) and the switch is coupled to the control device so as to reduce the drive torque of the drive when the switch is actuated.

2. The four-wheel industrial truck with a swing axle for the rear wheels, a drive, and a control device for said drive that generates an actuating signal for the drive in response to a generator signal wherein a stop is provided on the bodywork of the industrial truck that cooperates with the body of the swing axle, characterized in that a rotary pulse generator is arranged in the plane of rotation of the swing axle (14) that is coupled to the control device so as to reduce the drive torque of the drive when the signal of the rotary pulse generator reaches a predetermined value.

3. The four-wheel industrial truck according to claim 2 wherein the industrial truck has a driving motor for each driven wheel, characterized in that the control device reduces the drive torque of that driving motor which drives the outer wheel each in cornering.

4. The four-wheel industrial truck according to claim 3 wherein the industrial truck has a braking device controlled by a brake control device, characterized in that the signal of the switch or rotary pulse generator is provided to the brake control device such that a braking torque is generated when the switch responds or the signal of the rotary pulse generator reaches a predetermined value.

5. The four-wheel industrial truck according to claim 4, characterized in that the brakable wheels can be triggered separately by the brake control device and the brake control device brakes the outer wheel each in cornering when it receives a signal from the switch or rotary pulse generator.