Pedal locking device for a loader

• US 5,984,040 A
• Filed: 09/15/1997
• Issued: 11/16/1999
• Est. Priority Date: 09/16/1996
• Status: Expired due to Fees

• Current Assignee: Daewoo Heavy Industries Limited (Doosan Infracore Company Limited)
• Original Assignee: Daewoo Heavy Industries Limited (Doosan Infracore Company Limited)
• Inventors: Lee, Seung Keun
• Primary Examiner(s): Swann, J. J.
• Assistant Examiner(s): Bottorff, Christopher
• Application Number:
  US08/929,084
• Time in Patent Office: 792 Days
• Field of Search: 180/89.12, 180/271, 180/272, 180/286, 180/269, 280/748, 74/529
• US Class Current: 180/271
• CPC Class Codes: E02F 9/2004 Control mechanisms, e.g. control levers control levers per se G05G

Abstract

A loader includes a seat bar swingable between a lowered, operator protective position and a raised, non-protective position. A pedal is movable between an operative position and a neutral position and has a plate member with a slot opened at it'"'"'s top end. A pedal side crank is provided adjacent the pedal for rotation between a locking position and an unlocking position. Normally biased into the locking position, the pedal side crank has a lug member and is operatively coupled to the seat bar by virtue of a connecting rod and a seat bar side crank. Movement into the raised position of the seat bar causes the lug member of the pedal side crank to engage with the slot of the plate member of the pedal, thus locking the pedal in the neutral position.

Claims

1. A loader comprising:

a power operated working implement;

power delivery control means for selectively feeding and interrupting power to the working implement;

a seat bar swingable between a lowered position for securing the operator in place and a raised position for allowing the operator to enter or leave the loader;

a pedal operatively associated with the control means and movable between an operative position for causing the control means to feed the power to the working implement and a neutral position for having the control means interrupt the power delivery to the working implement, the pedal provided with first engaging means;

a pedal side crank provided adjacent the pedal for rotation between a locking position and an unlocking position, the pedal side crank having second engaging means releasably engageable with the first engaging means to keep the pedal in the neutral position while the pedal side crank remains in the locking position;

a seat bar side crank operatively connected to the pedal side crank for rotation between a forward position corresponding to the locking position of the pedal side crank and a rearward position corresponding to the unlocking position of the pedal side crank;

means for normally biasing the pedal side crank into the locking position; and

a push bracket attached to the seat bar for directly pushing the seat bar side crank into the rearward position while the seat bar is in the lowered position.

2. The loader as recited in claim 1, wherein the first engaging means of the pedal comprises a plate member extending upwards from one side of the pedal and having a slot opened at it'"'"'s top end.

3. The loader as recited in claim 2, wherein the plate member has first and second ramps diverging from the open end of the slot so that the height of the respective ramp gradually increases as the ramp goes away from the slot.

4. The loader as recited in claim 2, wherein the second engaging means comprises a lug member engageable with the slot of the plate member when the pedal side crank is rotated into the locking position.

5. The loader as recited in claim 1, wherein the means for normally biasing the pedal side crank comprises a tension spring connected to the pedal side crank to have it normally urged into the locking position.

6. A pedal locking device for a loader adapted to lock a pedal in its neutral position as a seat bar is swung from a lowered position into a raised position, comprising:

first engaging means movable in unison with the pedal;

a pedal side crank provided adjacent the pedal for rotation between a locking position and unlocking position;

second engaging means carried by the pedal side crank and releasably engageable with the first engaging means to keep the pedal in the neutral position while the pedal side crank remains in the locking position;

a seat bar side crank operatively connected to the pedal side crank for rotation between a forward position corresponding to the locking position of the pedal side crank and a rearward position corresponding to the unlocking position of the pedal side crank;

means for normally biasing the pedal side crank into the locking position; and

a push bracket attached to the seat bar for directly pushing the seat bar side crank into the rearward position while the seat bar is in the lowered position.

7. The pedal locking device as recited in claim 6, wherein the first engaging means comprises a plate member extending upwards from one side of the pedal and having a slot opened at it'"'"'s top end.

8. The pedal locking device as recited in claim 7, wherein the plate member has first and second ramps diverging from the open end of the slot so that the height of the respective ramp gradually increases as the ramp goes away from the slot.

9. The pedal locking device as recited in claim 7, wherein the second engaging means comprises a lug member engageable with the slot of the plate member when the pedal side crank is rotated into the locking position.

10. The pedal locking device as recited in claim 6, wherein the means for normally biasing the pedal side crank comprises a tension spring connected to the pedal side crank to have it normally urged into the locking position.

11. A loader comprising:

a power operated working implement;

a power delivery control arrangement to selectively feed and interrupt power to the working implement;

a seat bar swingable between a lowered position for securing the operator in place and a raised position for allowing the operator to enter or leave the loader;

a pedal operatively associated with the control arrangement and movable between an operative position for causing the control arrangement to feed the power to the working implement and a neutral position for having the control arrangement interrupt the power delivery to the working implement, the pedal provided with a first engaging mechanism;

a pedal side crank provided adjacent the pedal for rotation between a locking position and an unlocking position, the pedal side crank having a second engaging mechanism releasably engageable with the first engaging mechanism to keep the pedal in the neutral position while the pedal side crank remains in the locking position;

a seat bar side crank operatively connected to the pedal side crank for rotation between a forward position corresponding to the locking position of the pedal side crank and a rearward position corresponding to the unlocking position of the pedal side crank;

a biasing arrangement for normally biasing the pedal side crank into the locking position; and

a push bracket attached to the seat bar for directly pushing the seat bar side crank into the rearward position while the seat bar is in the lowered position.

12. A pedal locking device for a loader adapted to lock a pedal in its neutral position as a seat bar is swung from a lowered position into a raised position, comprising:

a first engaging mechanism movable in unison with the pedal;

a pedal side crank provided adjacent the pedal for rotation between a locking position and unlocking position;

a second engaging mechanism carried by the pedal side crank and releasably engageable with the first engaging mechanism to keep the pedal in the neutral position while the pedal side crank remains in the locking position;

a seat bar side crank operatively connected to the pedal side crank for rotation between a forward position corresponding to the locking position of the pedal side crank and a rearward position corresponding to tile unlocking position of the pedal side crank;

a biasing arrangement for normally biasing the pedal side crank into the locking position; and

a push bracket attached to the seat bar for directly pushing the seat bar side crank into the rearward position while the seat bar is in the lowered position.