Brake-actuating steering and braking control system for tracked vehicles

• US 6,527,070 B2
• Filed: 01/23/2001
• Issued: 03/04/2003
• Est. Priority Date: 01/23/2001
• Status: Expired due to Fees

• Current Assignee: Pdsco., Inc.
• Original Assignee: Pdsco., Inc.
• Inventors: Ryan, Robert G
• Primary Examiner(s): Graham, Matthew C.
• Application Number:
  US09/766,580
• Publication Number:
  US 20020096374A1
• Time in Patent Office: 770 Days
• Field of Search: 180/6.7, 180/6.2, 180/6.24, 180/6.28, 180/6.3
• US Class Current: 180/6.7
• CPC Class Codes: B62D 11/08 using brakes or clutches as main steering-effecting means
• CPC Class Codes: B62D 11/183 Control systems therefor

Abstract

A brake-actuating steering and braking control system for a tracked vehicle is provided with a braking control subsystem, a steering control subsystem, and right and left side brake-actuating subsystems. The braking control subsystem includes a brake pedal and is connected to brake mechanisms of each brake-actuating subsystem. A user may depress the brake pedal to apply a braking force to right and left side track assemblies of the tracked vehicle via the brake mechanisms to thereby slow or stop the tracked vehicle. The steering control subsystem includes a steering wheel and is connected to each of the brake mechanisms. The user may rotationally displace the steering wheel, which applies a braking force to the track assembly corresponding to the direction of rotational displacement of the steering wheel via the corresponding brake mechanism to thereby turn the tracked vehicle.

Claims

1. A brake-actuating steering and braking control system for a tracked vehicle having right and left side track assemblies, said system comprising:

a braking control subsystem;

a steering control subsystem;

right and left side brake-actuating subsystems;

each of said right and left side brake-actuating subsystems including a respective one of right and left side brake mechanisms, each of said right and left side brake mechanisms being coupled to a respective one of said right and left side track assemblies of said tracked vehicle and being constructed and arranged upon actuation to brakingly engage respective right and left side track assemblies;

said braking control subsystem including a brake pedal depressibly displaceable by a user, said braking control subsystem being communicated with each of said right and left side brake-actuating subsystems such that each of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said brake pedal by said user such that upon actuation, the right and left side track assemblies are one of slowed and stopped according to the displacement magnitude of the brake pedal, thereby slowing or stopping the tracked vehicle according to the magnitude of displacement of said brake pedal;

said steering control subsystem including a steering wheel rotatably displaceable by a user in clockwise and counter-clockwise directions, said steering control subsystem being communicated with each of said right and left side brake-actuating subsystems such that a corresponding one of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said steering wheel by said user such that upon actuation, one of the track assemblies according to the direction of displacement of said steering wheel, is one of slowed and stopped, thereby turning the tracked vehicle in a direction determined by the direction of displacement of said steering wheel within a radius determined by the magnitude of displacement of said steering wheel,

a fluid reservoir for storing a volume of fluid;

a hydraulic pump connected to said reservoir for removing fluid therefrom; and

an accumulator control valve, which is connected to and supplied pressurized fluid from said hydraulic pump, said accumulator control valve being constructed and arranged to deliver fluid under pressure to one of said braking control subsystem and said right and left side brake-actuating subsystems,

wherein said braking control subsystem includes a fluid accumulator, said fluid accumulator being constructed and arranged to store a volume of fluid under pressure therein.

2. A system according to claim 1, wherein said steering control subsystem includes a voltage varying structure coupled to said steering wheel from controlling said right and left side brake-actuating systems according to the rotational displacement of said steering wheel.

3. A system according to claim 1, wherein said steering control subsystem hydraulically controls said right and left side brake actuating systems according to the rotational displacement of said steering wheel.

4. A system according to claim 1, wherein said braking control subsystem includes a voltage varying structure, which is coupled to said brake pedal, said voltage varying structure being capable of delivering electrical power having a voltage corresponding to the displacement magnitude of said brake pedal to each of said right and left side brake-actuating subsystems.

5. A system according to claim 1, wherein said accumulator control valve includes a three-way valve and a two-way valve.

6. A system according to claim 1, wherein said braking control subsystem includes a brake light switch constructed and arranged to illuminate a brake light of the tracked vehicle upon depression of said brake pedal.

7. A system according to claim 6, wherein said braking control subsystem further includes a warning light switch constructed and arranged to illuminate a warning light of the tracked vehicle once fluid within the braking control subsystem reaches a predetermined relatively low pressure.

8. A brake-actuating steering and braking control system for a tracked vehicle having right and left side track assemblies, said system comprising:

a braking control subsystem;

a steering control subsystem;

right and left side brake-actuating subsystems;

each of said right and left side brake-actuating subsystems including a respective one of right and left side brake mechanisms, each of said right and left side brake mechanisms being coupled to a respective one of said right and left side track assemblies of said tracked vehicle and being constructed and arranged upon actuation to brakingly engage respective right and left side track assemblies;

said braking control subsystem including a brake pedal depressibly displaceable by a user, said braking control subsystem being communicated with each of said right and left side brake-actuating subsystems such that each of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said brake pedal by said user such that upon actuation, the right and left side track assemblies are one of slowed and stopped according to the displacement magnitude of the brake pedal, thereby slowing or stopping the tracked vehicle according to the magnitude of displacement of said brake pedal;

said steering control subsystem including a steering wheel rotatably displaceable by a user in clockwise and counter-clockwise directions, said steering control subsystem being communicated with each of said right and left side brake-actuating subsystems such that a corresponding one of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said steering wheel by said user such that upon actuation, one of the track assemblies according to the direction of displacement of said steering wheel, is one of slowed and stopped, thereby turning the tracked vehicle in a direction determined by the direction of displacement of said steering wheel within a radius determined by the magnitude of displacement of said steering wheel,

wherein said braking control subsystem includes a voltage varying structure, which is coupled to said brake pedal, said voltage varying structure being capable of delivering electrical power having a voltage corresponding to the displacement magnitude of said brake pedal to each of said right and left side brake-actuating subsystems, and

wherein each of said right and left side brake-actuating subsystems includes a pressure control valve, said pressure control valves having a voltage actuator, which are connected to said voltage varying structure such that each of said pressure control valves are actuated proportionally to the voltage of the electrical power delivered thereto from the voltage varying structure thereby actuating each of said brake-actuating mechanisms proportionally to the magnitude of displacement of said brake pedal.

9. A brake-actuating steering.and braking control system for a tracked vehicle having right and left side track assemblies, said system comprising:

a braking control subsystem;

a steering control subsystem;

right and left side brake-actuating subsystems;

each of said right and left side brake-actuating subsystems including a respective one of right and left side brake mechanisms, each of said right and left side brake mechanisms being coupled to a respective one of said right and left side track assemblies of said tracked vehicle and being constructed and arranged upon actuation to brakingly engage respective right and left side track assemblies;

said braking control subsystem including a brake pedal depressibly displaceable by a user, said braking control subsystem being communicated with each of said right and left side brake-actuating subsystems such that each of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said brake pedal by said user such that upon actuation, the right and left side track assemblies are one of slowed and stopped according to the displacement magnitude of the brake pedal, thereby slowing or stopping the tracked vehicle according to the magnitude of displacement of said brake pedal;

said steering control subsystem including a steering wheel rotatably displaceable by a user in clockwise and counter-clockwise directions, said steering control subsystem being communicated with each of said right and left side brake-actuating subsystems such that a corresponding one of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said steering wheel by said user such that upon actuation, one of the track assemblies according to the direction of displacement of said steering wheel, is one of slowed and stopped, thereby turning the tracked vehicle in a direction determined by the direction of displacement of said steering wheel within a radius determined by the magnitude of displacement of said steering wheel,

a fluid reservoir for storing a volume of fluid;

a hydraulic pump connected to said reservoir for removing fluid therefrom; and

an accumulator control valve, which is connected to and supplied pressurized fluid from said hydraulic pump, said accumulator control valve being constructed and arranged to deliver fluid under pressure to one of said braking control subsystem and said right and left side brake-actuating subsystems,

wherein said braking control subsystem includes a fluid accumulator, said fluid accumulator being constructed and arranged to store a volume of fluid under pressure therein,

wherein each of said right and left side brake-actuating subsystems includes a pressure control valve, each pressure control valve being communicated with said accumulator control valve and having fluid under pressure supplied therefrom, each of said pressure control valves having a hydraulic actuator, which is constructed and arranged to actuate associated pressure control valves in proportion to an amount of fluid under pressure supplied thereto.

10. A system according to claim 9, wherein said steering control subsystem includes a steering control valve, which is connected to and supplied pressurized fluid from said accumulator control valve, said steering control valve being connected to said steering wheel and being capable of delivering an amount of fluid under pressure to an associated one of said hydraulic actuators corresponding to the direction of displacement of said steering wheel, said amount corresponding to the magnitude of displacement of said steering wheel.

11. A system according to claim 10, wherein said brake control subsystem is connected to each of said hydraulic actuators and being capable of delivering an amount of fluid under pressure to each of said hydraulic actuators, said amount corresponding to the magnitude of displacement of said brake pedal.

12. A brake-actuating steering and braking control system for a tracked vehicle having right and left side track assemblies, said system comprising:

a braking control subsystem;

a steering control subsystem;

right and left side brake-actuating subsystems;

each of said right and left side brake-actuating subsystems including a respective one of right and left side brake mechanisms, each of said right and left side brake mechanisms being coupled to a respective one of said right and left side track assemblies of said tracked vehicle and being constructed and arranged upon actuation to brakingly engage respective right and left side track assemblies;

said braking control subsystem including a brake pedal depressibly displaceable by a user, said braking control subsystem being communicated with each of said right and left side brake-actuating subsystems such that each of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said brake pedal by said user such that upon actuation, the right and left side track assemblies are one of slowed and stopped according to the displacement magnitude of the brake pedal, thereby slowing or stopping the tracked vehicle according to the magnitude of displacement of said brake pedal;

said steering control subsystem including a steering wheel rotatably displaceable by a user in clockwise and counter-clockwise directions, said steering control subsystem being communicated with each of said right and left side brake-actuating subsystems such that a corresponding one of said right and left side brake mechanisms is actuated proportionally to a magnitude of displacement of said steering wheel by said user such that upon actuation, one of the track assemblies according to the direction of displacement of said steering wheel, is one of slowed and stopped, thereby turning the tracked vehicle in a direction determined by the direction of displacement of said steering wheel within a radius determined by the magnitude of displacement of said steering wheel,

a fluid reservoir for storing a volume of fluid;

a hydraulic pump connected to said reservoir for removing fluid therefrom; and

an accumulator control valve, which is connected to and supplied pressurized fluid from said hydraulic pump, said accumulator control valve being constructed and arranged to deliver fluid under pressure to one of said braking control subsystem and said right and left side brake-actuating subsystems,

wherein said braking control subsystem includes a fluid accumulator, said fluid accumulator being constructed and arranged to store a volume of fluid under pressure therein,

wherein each of said right and left side brake-actuating subsystems includes a pressure control valve, each pressure control valve being communicated with said accumulator control valve and having fluid under pressure supplied therefrom, each of said pressure control valves having a voltage actuator, which is constructed and arranged to actuate associated pressure control valves in proportion to a voltage of electrical power supplied thereto.

13. A system according to claim 12, wherein said steering control subsystem includes a voltage varying structure, said voltage varying structure being coupled to said steering wheel and being constructed and arranged to deliver to each of said voltage actuators electrical power having a voltage corresponding to the rotational displacement of said steering wheel.

14. A system according to claim 13, wherein said braking control subsystem is connected to each of said right and left side brake-actuating subsystems between said pressure control valves and said brake mechanisms.

15. A system according to claim 14, wherein said steering control subsystem is supplied power from a generator, which is operatively coupled to an engine of said tracked vehicle.