Dual mode stabilizer for backhoe loaders and backhoe attachments

• US 20010002086A1
• Filed: 01/11/2001
• Published: 05/31/2001
• Est. Priority Date: 06/12/1998
• Status: Active Grant

• Current Assignee: Clark Equipment Company (Doosan Heavy Industries and Construction Company Limited)
• Original Assignee: William E. Webb
• Inventors: Webb, Sterling E.
• Granted Patent: US 6,443,490 B2
• Time in Patent Office: Days
• US Class Current: 280/765.1
• CPC Class Codes: B66C 23/80 hydraulically actuated
• CPC Class Codes: E02F 9/085 Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs for vehicles in general B60S9/00, for cranes B66C23/78

Abstract

A dual mode stabilizer for primary use in conjunction with a backhoe loader or in conjunction with a backhoe attachment for a skid steer loader. The dual mode stabilizer includes a pair of base members rigidly fixable on opposite sides of the tractor proximate the backhoe. A stabilizer arm assembly engages the base member. The stabilizer arm assembly is piston actuated and includes an outrigger arm member, a sliding arm member pivotally connected to the outrigger arm member so as to limit movement of the outrigger arm member with respect to the sliding arm member to rotational movement about a first pivot point, a first locking mechanism for preventing rotational movement of the outrigger arm member. Movement of the sliding arm member within the base member is limited to axial movement. A second locking mechanism is provided between the base member and the sliding arm member to prevent axial movement of the sliding arm member within the base member.

Claims

1. A dual mode stabilizer for a tractor, said dual mode stabilizer comprising:

at least one base member rigidly fixable proximate a side of the tractor, said at least one base member having an upper end and a lower end;

a clevis disposed proximate said lower end of said at least one base member, wherein said clevis defines a stop;

a stabilizer arm assembly engaged with said base member having an outrigger arm member and a sliding arm member, said outrigger arm member and said sliding arm member being pivotally connected together at a pivot point so as to allow rotational movement of said outrigger arm member relative to said sliding arm member, said pivot point being engageable with said stop so as to limit upward travel of said stabilizer arm assembly relative to said base member;

a mechanism in association with said base member and said sliding arm member for limiting movement of said sliding arm member relative to said base member to axial movement;

a first locking mechanism interconnecting said outrigger arm member and said sliding arm member for preventing rotational movement of said outrigger arm member around said pivot point;

a second locking mechanism interconnecting said base member and said sliding arm member for preventing axial movement of said sliding member relative to said base member; and

a drive mechanism connected between said base member and said stabilizer arm assembly for actuating said stabilizer arm assembly whereby said dual mode stabilizer is selectively operable in a vertical stabilizer mode and a fold down stabilizer mode.

2. The dual mode stabilizer of

claim 1

wherein said dual mode stabilizer is mountable on a frame of the tractor.

3. The dual mode stabilizer of

claim 1

wherein said dual mode stabilizer is mountable on a backhoe attachment carried by the tractor.

4. The dual mode stabilizer of

claim 1

wherein said first locking mechanism is defined by a first pair of hole members disposed in spaced relation and in register on opposite side walls of said outrigger arm member, a second pair of hole members disposed in spaced relation and in register on opposite side walls of said sliding arm member, and a lynch pin adapted to be received by said first and said second pair of hole members when said sliding member is positioned such that said second pair of hole members is in register with said first pair of hole members.

5. The dual mode stabilizer of

claim 1

wherein said first locking mechanism is defined by a pair of hole members disposed in spaced relation and in register on first and second tabs in spaced relation disposed proximate an upper end of said sliding arm member and a hole member provided in a tab disposed on an upper end of said outrigger arm member, and a lynch pin adapted to be received by said registering hole members when said sliding arm member is positioned such that said pair of hole members associated with said sliding arm member is in register with said hole member associated with said outrigger arm member.

6. The dual mode stabilizer of

claim 1

wherein said second locking mechanism is defined by a first pair of hole members disposed in spaced relation and in register on opposing walls of said base member, at least one hole member provided in a wall of said sliding arm member, and a lynch pin adapted to be received by said first pair of hole members and said at least one hole member when said sliding arm member is positioned such that said at least one hole member is in register with said first pair of hole members.

7. The dual mode stabilizer of

claim 1

wherein said drive mechanism is defined by a piston.

8. The dual mode stabilizer of

claim 7

wherein said piston is hydraulically driven.

9. The dual mode stabilizer of

claim 1

wherein said dual mode stabilizer further comprises a brace disposed proximate said clevis for reinforcing said stop.

10. The dual mode stabilizer of

claim 1

wherein said dual mode stabilizer further comprises a mounting member carried by said base member and at least an upper and at least a lower mounting bracket secured to said mounting member, said mounting member and said upper and lower mounting brackets being adapted for securing said dual mode stabilizer to a rubber-tire backhoe loader.

11. The dual mode stabilizer of

claim 10

wherein said mounting member includes a first plurality of hole members are carried by said mounting member proximate said upper mounting bracket and a second plurality of hole members are carried by said mounting member proximate said lower mounting bracket and said upper and said lower mounting brackets are secured to said mounting member by fasteners engaged with said first and second plurality of hole members carried by said mounting member.

12. The dual mode stabilizer of

claim 11

wherein said first plurality of hole members carried by said mounting member are elliptical.