Operator cab for a work vehicle with reduced noise reflection

Patent metadata

Field	Value
Publication number	US-11440489-B2
Application number	US-201916722906-A
Country	US
Kind code	B2
Filing date	Dec 20, 2019
Priority date	Dec 20, 2019
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

An operator cab for a work vehicle includes: a cab enclosure including a roof an operator chair disposed in the cab enclosure; at least one layer of noise-deadening material coupled to the roof; and a headliner coupled to the roof such that the at least one layer of noise-deadening material is at least partially disposed between the headliner and the roof. The headliner includes a noise-reflective material and a noise escape region that comprises at least one opening configured to allow sound waves to pass through the noise escape region into the at least one layer of noise-deadening material and reduce noise reflection by the headliner to the operator chair.

First claim

What is claimed is:

1. An operator cab for a work vehicle, comprising:
a cab enclosure comprising a roof;
an operator chair disposed in the cab enclosure;
at least one layer of noise-deadening material coupled to the roof; and
a headliner coupled to the roof such that the at least one layer of noise-deadening material is at least partially disposed between the headliner and the roof, the headliner comprising a noise-reflective material, a concave region that comprises a pair of opposed curved surfaces that direct sound waves toward the operator chair, and a noise escape region disposed between the pair of opposed curved surfaces, the noise escape region comprising at least one opening configured to allow sound waves to pass through the noise escape region into the at least one layer of noise-deadening material and reduce noise reflection by the headliner to the operator chair.

2. The operator cab of claim 1 , wherein the at least one opening comprises a plurality of perforations formed in the sound-reflective material.

3. The operator cab of claim 1 , wherein the at least one opening is vertically aligned with the operator chair.

4. The operator cab of claim 1 , wherein the at least one layer of noise-deadening material comprises a foam.

5. The operator cab of claim 1 , wherein the noise-reflective material comprises a rigid polymer.

6. The operator cab of claim 5 , wherein the headliner has a thickness of between 4 mm and 5 mm.

7. The operator cab of claim 1 , wherein the noise escape region is oval-shaped.

8. A work vehicle, comprising:
a chassis; and
an operator cab carried by the chassis, the operator cab comprising:
a cab enclosure comprising a roof;
an operator chair disposed in the cab enclosure;
at least one layer of noise-deadening material coupled to the roof; and
a headliner coupled to the roof such that the at least one layer of noise-deadening material is at least partially disposed between the headliner and the roof, the headliner comprising a noise-reflective material, a concave region comprising a pair of opposed curved surfaces that direct sound waves toward the operator chair, and a noise escape region disposed between the pair of opposed curved surfaces, the noise escape region comprising at least one opening configured to allow sound waves to pass through the noise escape region into the at least one layer of noise-deadening material and reduce noise reflection by the headliner to the operator chair.

9. The work vehicle of claim 8 , wherein the at least one opening comprises a plurality of perforations formed in the sound-reflective material.

10. The work vehicle of claim 8 , wherein the at least one opening is vertically aligned with the operator chair.

11. The work vehicle of claim 8 , wherein the at least one layer of noise-deadening material comprises a foam.

12. The work vehicle of claim 8 , wherein the noise-reflective material comprises a rigid polymer.

13. The work vehicle of claim 12 , wherein the headliner has a thickness of between 4 mm and 5 mm.

14. The work vehicle of claim 8 , wherein the noise escape region is oval-shaped.

Assignees

• Cnh Ind America Llc

Inventors

• Lou Bin
• Singh Samrendra K
• Klassen Mark D
• Booth David S
• Ghorpade Kaushal
• Tamamidis Panos
• Keller Nathan J

Classifications

• B60R13/0815 Primary

  Acoustic or thermal insulation of passenger compartments (wall or roof liners integrating the insulating function B60R13/02; insulating floor mats or carpets B60N3/04) · CPC title

• B60R2013/0287

  integrating other functions or accessories · CPC title

• E02F9/16

  Cabins, platforms, or the like, for drivers ({for motor vehicles in general B62D33/06}, for cranes B66C13/54) · CPC title

• B62D33/0617

  for tractors or off-the-road vehicles (protective devices for drivers in case of overturning of tractors B60R21/131) · CPC title

• B60R13/0225

  self supporting head liners · CPC title