Patent Application
20130168185
1. Field of the Invention
The present invention relates to a movable lift, and more particularly to a movable lift which is operated by a user on a pallet to move or rotate the movable lift, or elevate the pallet even when the pallet is lifted high.
2. Description of Related Art
A conventional constructional lift setting a predict height for high work is provided to make engineers to detach billboard or paint at high location, or to assemble color fluorescent tubes or to repair alarm devices. However, the conventional constructional lift is not movable and must to set wheels thereunder to allow users to push or pull to move. Therefore, the conventional constructional lift is usually operated by two workers, one is on the pallet lifted highly and the other stands beside the conventional constructional lift to push. If the conventional constructional lift is operated by one worker only, the worker has to climb up and down frequently to perform the work and to drive the conventional constructional lift separately.
A main objective of the present invention is to provide a movable lift which can be operated conveniently.
To achieve the foregoing objective, the movable lift comprises:
a frame having a pedestal and a pallet movably mounted the pedestal, and multiple wheels attached under the pedestal;
a connecting base mounted on the frame and having a top, a bottom, a socket formed on the top, a non-circular hole defined on the socket, and a transmission device contained inside the connecting base to connect to a ground wheel;
a telescoping tube mounted to the connecting base and comprising a driving rod with a non-circular cross-section which has an upper end and lower end respectively defined as a driving distal and a driving portion, wherein the driving portion inserts into the non-circular hole of the socket for combination;
an elevating device mounted on the frame beside the pallet and comprising an oil-pressure box with a pedal attached to the oil-pressure box, a rotation rod attached to a top of the oil-pressure box, a knob secured on the rotation rod for release pressure of the oil-pressure box, an oil-pressure driving rod communicated with the oil-pressure box by a resilient tube, and an oil-pressure driving lower rod telescoping with the oil-pressure driving rod and secured to the pedestal of the frame, wherein the pedal has a pivot portion attached to a second resilient element mounted under the oil-pressure box; and
a driving tool mounted on the telescoping tube, electrically connected to a motor, and having a driving end inserting to the driving distal of the driving rod, a handle formed at side of the driving tool to rotate the driving rod to control rotation of the ground wheel, wherein the handle has a switch set at underside of the handle to actuate or stop the motor and a direction switch set as side face of the handle to switch rotational directions of the motor to control the forward or backward of the movable lift; and
a Y-shaped bracket is mounted at a top side of the telescoping tube to hold the handle.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
A movable lift in accordance with the present invention has a frame with a connecting base, a telescoping tube mounted on the connecting base, a driving tool attached to the telescoping tube, and an elevating device mounted on the frame to drive a pallet. By having the above structure, the movable lift is operated by a user on the pallet to move, rotate the movable lift, or elevate the pallet even when the pallet is lifted high. Therefore, the movable lift is easy and convenient in operation and utility.
As shown in
The frame 60 has a pedestal 63 and a pallet 62 movably mounted the pedestal 63 up and down. Multiple wheels 61 are attached under the pedestal 63 and two joint portions 64 are formed at a rear end of the pedestal 63.
The connecting base 10 is a case selectively mounted on one of the two joint portions 64 of the frame 60 to satisfy a right-handed or left-handed user. As shown in
The telescoping tube 30 is mounted to the connecting base 10 selectively combined to one of the two joint portions 64 on the frame 60 and comprises a long driving rod 40 (as shown in
With reference back to
With reference to
Therefore, a user can grip the handle 51 and press the switch 52 of the driving tool 50 to actuate the motor 53 to drive the driving end 54, the driving rod 40, the first tapered gear 11, the second tapered gear 13, the first chain wheel 15, the second chain wheel 17 to make the ground wheel 20 rotate. Moreover, the telescoping tube 30 and the driving rod 40 have a predict height aligned with the pallet 62 to allow the user to operate the ground wheel 20 and drive the movable lift to move by a connecting bridge 19. As shown in
With reference to
According to above description, the movable lift in accordance with the present invention has simple structure and is easy in operation to allow the user on the pallet 62 to drive the ground wheel 20 to move the frame 60 with wheels 61 forward, backward or rotate even when the pallet 62 is lifted at high position. The movable lift is applicable in any high work above the ground such as billboard attachment, fire-fighting system setting, etc. and is easy to be composed or disassembled. Moreover, the movable lift of the present invention has durable and low-malfunctioning quality and thus improves its working efficiency, convenience and utility.
Although this invention has been described in its preferred form with a certain degree of particularity, it is understood that the present invention of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts any be resorted to without departing from the spirit and scope of the invention.
