IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0090156
(2011-04-19)
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등록번호 |
US-8752657
(2014-06-17)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Power Handling, Incorporated
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
5 |
초록
▼
A pallet jack power assembly upgrades a manually powered pallet jack to provide a motor-driven drive wheel. In one example, the manually powered pallet jack includes left and right steering wheels separated by a narrow distance. A frame of the pallet jack power assembly may be adapted for attachment
A pallet jack power assembly upgrades a manually powered pallet jack to provide a motor-driven drive wheel. In one example, the manually powered pallet jack includes left and right steering wheels separated by a narrow distance. A frame of the pallet jack power assembly may be adapted for attachment to the pallet jack. The frame supports a drive axle, which in turn supports a drive wheel. Attachment of the frame of the pallet jack power assembly locates the drive wheel between the left and right steering wheels. The drive axle and a steering axle, supporting the left and right steering wheels of the pallet jack, may be located in a same vertical plane. A biasing device, such as a spring, may be used to provide a downward force on the drive wheel, thereby increasing friction between the drive wheel and the floor.
대표청구항
▼
1. A pallet jack power assembly, attached to a pallet jack having left and right steering wheels, the pallet jack power assembly comprising: a frame, adapted for attachment to the pallet jack;a drive wheel supported by a drive axle, wherein attachment of the frame to the pallet jack locates: the dri
1. A pallet jack power assembly, attached to a pallet jack having left and right steering wheels, the pallet jack power assembly comprising: a frame, adapted for attachment to the pallet jack;a drive wheel supported by a drive axle, wherein attachment of the frame to the pallet jack locates: the drive axle in a same vertical plane as a steering axle supporting the left and right steering wheels;the drive wheel entirely below the steering axle;the drive wheel between the left and right steering wheels of the pallet jack; anda motor, to power a power train to rotate the drive wheel. 2. The pallet jack power assembly of claim 1, further comprising: a drive wheel arm to which the drive axle is attached, the drive wheel arm being moveable with respect to the frame in response to a biasing member. 3. The pallet jack power assembly of claim 1, further comprising: a drive wheel arm supporting the drive axle, the drive wheel arm pivotably attached to the frame;a spring interposed between the frame and the drive wheel arm and biasing the drive wheel arm away from the frame; anda latch connected to the drive wheel arm, which allows the drive wheel arm to be disengaged from the frame to allow replacement of the spring. 4. The pallet jack power assembly of claim 1, wherein a diameter of the drive wheel is less than a radius of the left and right steering wheels. 5. The pallet jack power assembly of claim 1, wherein the power train comprises: a chain coupling the motor and a gear axle; anda chain coupling the gear axle and the drive axle. 6. The pallet jack power assembly of claim 1, wherein the power train comprises first and second sprockets, reversibly positionable on a motor axle and a gear axle, to provide lower and higher gear ratios, respectively. 7. A pallet jack power assembly, attached to a pallet jack having left and right steering wheels, the pallet jack power assembly comprising: a frame, adapted for attachment to the pallet jack;a drive wheel supported by a drive axle, wherein the frame locates a center of the drive axle directly below a center of a jacking cylinder of the pallet jack upon attachment of the pallet jack power assembly to the pallet jack;a drive wheel arm to which the drive axle is attached, the drive wheel arm being moveable with respect to the frame against a biasing member; anda motor, to power a power train to rotate the drive wheel. 8. The pallet jack power assembly of claim 7, wherein the drive wheel has a diameter less than a radius of the left and right steering wheels and the drive axle is located under a steering axle connected to the left and right steering wheels. 9. The pallet jack power assembly of claim 7, wherein the drive wheel has a diameter less than a radius of the steering wheels. 10. The pallet jack power assembly of claim 8, wherein the power train comprises first and second sprockets, reversibly positionable on a motor axle and a gear axle, to provide lower and higher gear ratios, respectively. 11. A system, comprising: a pallet jack having a fork operated by a lift mechanism and having left and right steering wheels supported by a steering axle;a pallet jack power assembly, including: a drive wheel, supported by a drive axle, the drive wheel located between left and right steering wheels of the pallet jack, the drive wheel having a diameter less than a radius of the left and right steering wheels, the drive axle in a same vertical plane as the steering axle;a drive wheel arm to support the drive axle, the drive wheel arm being pivotably attached to a frame of the pallet jack power assembly;a biasing member, interposed between the frame and the drive wheel arm, and biasing the drive wheel arm away from the frame; anda power train, to provide power to the drive wheel. 12. The system of claim 11, wherein the biasing member is removable and replaceable with a second biasing member, by releasing the drive wheel arm. 13. The system of claim 12, wherein the drive wheel is entirely below the steering axle.
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