Military vehicle

Patent metadata

Field	Value
Publication number	US-11840208-B2
Application number	US-202217748589-A
Country	US
Kind code	B2
Filing date	May 19, 2022
Priority date	Mar 26, 2012
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A brake system includes a brake actuator configured to engage a brake to limit movement of a tractive element, an air-to-hydraulic intensifier coupled to the brake actuator where the air-to-hydraulic intensifier is configured to receive a supply of air and provide a hydraulic fluid to the brake actuator based on the supply of air to overcome a brake biasing force of the brake actuator to disengage the brake actuator from the brake to permit movement of the tractive element, a hydraulic reservoir coupled to the air-to-hydraulic intensifier, and a valve. The valve includes a first port fluidly coupled to the air-to-hydraulic intensifier, a second port fluidly coupled to the hydraulic reservoir, a third port fluidly coupled to the brake actuator, and a valve gate that is repositionable between a first position that couples the first port to the third port and a second position that couples the second port to the third port.

First claim

The invention claimed is:

1. A military vehicle comprising:
a brake housing defining an inner volume;
a piston separating the inner volume into a first chamber and a second chamber;
a rod extending through an end of the brake housing and coupled to the piston, the rod positioned to selectively engage with a brake to inhibit movement of a tractive element;
a resilient member positioned within the inner volume and configured to generate a brake biasing force against the piston such that the rod is biased into engagement with the brake;
an air-to-hydraulic intensifier coupled to the brake housing, the air-to-hydraulic intensifier configured to receive a supply of air and provide a hydraulic fluid to the brake housing based on the supply of air to overcome the brake biasing force to disengage the rod from the brake to permit movement of the tractive element;
a valve positioned between the air-to-hydraulic intensifier and the brake housing; and
a hydraulic reservoir fluidly coupled to the valve and the air-to-hydraulic intensifier;
wherein the valve includes a first port fluidly coupled to the air-to-hydraulic intensifier, a second port fluidly coupled to the hydraulic reservoir, a third port fluidly coupled to the brake housing, and a valve gate that is repositionable between a first position and a second position, the first position coupling the first port to the third port to fluidly couple the air-to-hydraulic intensifier to the brake housing, the second position coupling the second port to the third port to fluidly couple the hydraulic reservoir to the brake housing.

2. The military vehicle of claim 1 , further comprising the brake and the tractive element.

3. The military vehicle of claim 1 , wherein the air-to-hydraulic intensifier includes a hydraulic pump.

4. The military vehicle of claim 1 , wherein the brake biasing force of the resilient member is configured to bias the piston to force the hydraulic fluid out of the brake housing, through the valve, and into the hydraulic reservoir in response to the valve being in the second position.

5. The military vehicle of claim 1 , wherein the valve includes:
an air pilot positioned at a first end of the valve gate; and
a biasing element positioned at an opposing second end of the valve gate, the biasing element configured to provide a valve biasing force to the valve gate to bias the valve gate into the second position.

6. The military vehicle of claim 5 , further comprising an air supply line coupled to the air-to-hydraulic intensifier and the air pilot, the air supply line configured to provide the supply of air to the air-to-hydraulic intensifier and the air pilot.

7. The military vehicle of claim 6 , wherein the supply of air provided to the air pilot overcomes the valve biasing force to reposition the valve gate into the first position to place the air-to-hydraulic intensifier into fluid communication with the brake housing to facilitate disengaging the brake.

8. The military vehicle of claim 1 , further comprising a passenger capsule.

9. The military vehicle of claim 8 , wherein the passenger capsule includes sidewalls and a floor coupled to the sidewalls, wherein bottom edges of the sidewalls extend past and below the floor, further comprising a belly deflector having lateral ends coupled to the bottom edges of the sidewalls, wherein the belly deflector is positioned beneath and isolated from the floor.

10. The military vehicle of claim 8 , wherein the passenger capsule defines a front door aperture, a rear door aperture, and an interlocking door frame portion positioned along and protruding outward from an exterior of the passenger capsule and positioned between the front door aperture and the rear door aperture, and wherein the passenger capsule includes (i) a front door positioned to selectively enclose the front door aperture and engage with the interlocking door frame portion only when closed and (ii) a rear door positioned to selectively enclose the rear door aperture and selectively engage with the interlocking door frame portion only when closed.

11. The military vehicle of claim 8 , wherein the passenger capsule includes a floor that defines a structural tunnel having an arcuate-shaped profile extending into an interior of the passenger capsule, further comprising:
energy absorbing seats positioned on opposing sides of the structural tunnel, the energy absorbing seats including a shock attenuating system; and
footpads positioned beneath the energy absorbing seats and spaced from the floor.

12. The military vehicle of claim 1 , further comprising:
a prime mover;
a generator configured to be driven by the prime mover to generate electricity; and
an export power kit coupled to the generator and configured to facilitate exporting power off of the military vehicle.

13. A military vehicle comprising:
a brake;
a tractive element;
a brake actuator configured to engage the brake to limit movement of the tractive element;
an air-to-hydraulic intensifier coupled to the brake actuator, the air-to-hydraulic intensifier configured to receive a supply of air and provide a hydraulic fluid to the brake actuator based on the supply of air to overcome a brake biasing force of the brake actuator to disengage the brake actuator from the brake to permit movement of the tractive element;
a hydraulic reservoir coupled to the air-to-hydraulic intensifier; and
a valve positioned between the air-to-hydraulic intensifier, the brake actuator, and the hydraulic reservoir, the valve including:
a first port fluidly coupled to the air-to-hydraulic intensifier;
a second port fluidly coupled to the hydraulic reservoir;
a third port fluidly coupled to the brake actuator; and
a valve gate that is repositionable between a first position and a second position, the first position coupling the first port to the third port to fluidly couple the air-to-hydraulic intensifier to the brake actuator, the second position coupling the second port to the third port to fluidly couple the hydraulic reservoir to the brake actuator.

14. The military vehicle of claim 13 , wherein the valve includes:
an air pilot positioned at a first end of the valve gate; and
a biasing element positioned at an opposing second end of the valve gate, the biasing element configured to provide a valve biasing force to the valve gate to bias the valve gate into the second position.

15. The military vehicle of claim 14 , further comprising an air supply line coupled to the air-to-hydraulic intensifier and the air pilot, the air supply line configured to provide the supply of air to the air-to-hydraulic intensifier and the air pilot.

16. The military vehicle of claim 15 , wherein the supply of air provided to the air pilot overcomes the valve biasing force to reposition the valve gate into the first position to place the air-to-hydraulic intensifier into fluid communication with the brake actuator to facilitate disengaging the brake.

17. The military vehicle of claim 13 , further comprising:
a prime mover;
a generator configured to be driven by the prime mover to generate electricity; and
an export power kit coupled to the generator and configured to facilitate exporting power off of the military vehicle.

18. The military vehicle of claim 13 , further comprising a passenger capsule, wherein the passenger capsule includes sidewalls and a floor coupled to the sidewalls, wherein bottom edges of the sidewalls extend past and below the floor, further comprising a belly deflector having lateral ends coupled to the bottom edges of the sid

Assignees

• Oshkosh Defense Llc

Inventors

• Verhoff Don
• Schmiedel Gary
• Yakes Chris
• Messina Rob
• Wilkins Brian
• Schulte Kent
• Seffernick Daniel R
• Holda Joseph
• Peotter Michael
• Mcgraw David
• Seefeldt Anthony
• Pelko Dave
• Gander Jesse
• Reineking Jerry
• Steinke Jesse

Classifications

• B60T7/20 Primary

  specially for trailers, e.g. in case of uncoupling of {or overrunning by} trailer (inertia-actuated overrun brakes B60T13/08) · CPC title

• B60G17/04 Primary

  fluid spring characteristics · CPC title

• B60T13/14

  using accumulators or reservoirs {fed by pumps} · CPC title

• B60T13/16

  using pumps directly, i.e. without interposition of accumulators or reservoirs · CPC title

• B60T13/249

  Hydraulic command of the control valve, hydraulic transmission to the brakes · CPC title