Buffer system for hydraulic hammer

Patent metadata

Field	Value
Publication number	US-10076831-B2
Application number	US-201514864110-A
Country	US
Kind code	B2
Filing date	Sep 24, 2015
Priority date	Sep 24, 2015
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A buffer system for a hydraulic hammer is disclosed. The buffer system includes a wear member disposed between a first component and a second component. The wear member includes a first surface. The first surface is adapted to abut an inner surface of the first component. The wear member also includes a second surface distal to the first surface. The second surface is adapted to abut an outer surface of the second component. The buffer system also includes an insert member disposed in the wear member between the first surface and the second surface thereof. The insert member provides a visual indication when a predefined thickness of the wear member between the first surface and the second surface is worn.

First claim

What is claimed is:

1. A buffer system for a hydraulic hammer, the buffer system comprising:
a wear member including at least one plate that is disposed between a housing member and a power cell of the hydraulic hammer, the wear member comprising:
a first surface of the at least one plate configured to abut an inner surface of the housing member; and
a second surface of the at least one plate distal to the first surface, the second surface configured to abut an outer surface of the power cell; and
an insert member disposed in the at least one plate of the wear member and extending between the first surface and the second surface of the at least one plate thereof, wherein the insert member provides a visual indication when a predefined thickness of the wear member between the first surface and the second surface is worn.

2. The buffer system of claim 1 , wherein the wear member comprises a first thickness extending between the first surface and the second surface, wherein the first thickness is configured to provide a clearance fit between the housing member and the power cell.

3. The buffer system of claim 1 , wherein the wear member comprises:
a first end and a second end distal from the first end, and wherein the wear member defines a length extending between the first end and the second end thereof; and
a first side and a second side distal from the first side, the first side and the second side extending between the first end and the second end, and wherein the wear member defines a width extending between the first side and the second side.

4. The buffer system of claim 3 , wherein the insert member defines a length equal to or less than the width of the wear member.

5. The buffer system of claim 2 , wherein the insert member defines a second thickness lesser than the first thickness of the wear member.

6. The buffer system of claim 5 , wherein insert member comprises:
a top surface disposed adjacent to the second surface of the wear member; and
a bottom surface distal to the top surface, the bottom surface disposed adjacent to the first surface of the wear member,
wherein the top surface of the insert member is disposed within the wear member at the predefined thickness with reference to the second surface of the wear member, and wherein the second thickness of the insert member is defined between the top surface and the bottom surface thereof.

7. The buffer system of claim 6 , wherein the top surface of the insert member is one of a circular shape, an elliptical shape and a polygonal shape.

8. The buffer system of claim 6 , wherein the insert member comprises a warning mark defined on the top surface thereof to indicate replacement of the wear member to an operator.

9. The buffer system of claim 1 , wherein the insert member is molded to the wear member during manufacturing of the wear member.

10. A hydraulic hammer comprising:
a housing member;
a power cell disposed within the housing member; and
a buffer system disposed between the housing member and the power cell, the buffer system comprising:
a wear member including at least one plate that is disposed between the housing member and the power cell, the wear member comprising:
a first surface of the at least one plate configured to abut an inner surface of the housing member; and
a second surface of the at least one plate distal to the first surface, the second surface configured to abut an outer surface of the power cell; and
an insert member disposed in the wear member between the first surface and the second surface thereof, wherein the insert member provides a visual indication when a predefined thickness of the wear member between the first surface and the second surface is worn.

11. The hydraulic hammer of claim 10 , wherein the wear member comprises a first thickness extending between the first surface and the second surface, wherein the first thickness is configured to provide a clearance fit between the housing member and the power cell.

12. The hydraulic hammer of claim 10 , wherein the wear member comprises:
a first end and a second end distal from the first end, and wherein the wear member defines a length extending between the first end and the second end thereof; and
a first side and a second side distal from the first side, the first side and the second side extending between the first end and the second end, and wherein the wear member defines a width extending between the first side and the second side.

13. The hydraulic hammer of claim 12 , wherein the insert member defines a length equal to or less than the width of the wear member.

14. The hydraulic hammer of claim 11 , wherein the insert member defines a second thickness lesser than the first thickness of the wear member.

15. The hydraulic hammer of claim 14 , wherein insert member comprises:
a top surface disposed adjacent to the second surface of the wear member; and
a bottom surface distal to the top surface, the bottom surface disposed adjacent to the first surface of the wear member,
wherein the top surface of the insert member is disposed within the wear member at the predefined thickness with reference to the second surface of the wear member, and wherein the second thickness of the insert member is defined between the top surface and the bottom surface thereof.

16. The hydraulic hammer of claim 15 , wherein the top surface of the insert member is one of a circular shape, an elliptical shape and a polygonal shape.

17. The hydraulic hammer of claim 15 , wherein the insert member comprises a warning mark defined on the top surface thereof to indicate replacement of the wear member to an operator.

18. The hydraulic hammer of claim 10 , wherein the insert member is molded to the wear member during manufacturing of the wear member.

19. A buffer system for a hydraulic hammer comprising a housing member and a power cell disposed within the housing member, the buffer system comprising:
a wear member including at least one plate that is disposed between the housing member and the power cell, the wear member configured to provide a clearance fit between the housing member and the power cell; and
an insert member disposed in the at least one plate of the wear member, wherein the insert member provides a visual indication when a predefined thickness of the wear member is worn, and
wherein the insert member is molded to the wear member.

20. The buffer system of claim 19 , wherein the wear member comprises a first thickness, and wherein the insert member comprises a second thickness lesser than the first thickness of the wear member.

Assignees

• Caterpillar Inc

Inventors

• Moore Cody T

Classifications

• B25D9/00

  Portable percussive tools with fluid-pressure drive, {i.e. driven directly by fluids}, e.g. having several percussive tool bits operated simultaneously {(portable non-percussive drilling tools driven by fluid pressure or pneumatic power B23B45/04)} · CPC title

• B25D17/28

  Supports; Devices for holding power-driven percussive tools in working position {(connections of hammers to backhoes E02F3/966)} · CPC title

• B25D2250/121

  Housing details · CPC title

• B25D17/06 Primary

  Hammer pistons; Anvils {; Guide-sleeves for pistons} · CPC title

• B25D2250/155

  Marks, e.g. identification marks, indication scales, visualising means · CPC title