Hydraulic pushing device

Patent metadata

Field	Value
Publication number	US-9278835-B2
Application number	US-201414332411-A
Country	US
Kind code	B2
Filing date	Jul 16, 2014
Priority date	Jan 17, 2012
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A hydraulic pushing device, including: a hydraulic unit, a rear seat, a front seat, a prying mechanism, an automatic adjustment mechanism, and a zero-torque pushing mechanism. The hydraulic unit and the rear seat are disposed on a platform. The zero-torque pushing mechanism includes two hydraulic cylinders, one end of each of the two hydraulic cylinders is hinged to the rear seat via a third hinge pin, and the other end of each of the two hydraulic cylinders is hinged to the front seat via a second hinge pin. The automatic adjustment mechanism includes a control lever and two locating pieces. One end of the control lever is in a fixed connection to the front seat, and the other end of the control lever is clamped by the two locating pieces. The prying mechanism includes two pawls, a pawl shaft, two prying guides, and two rows of equidistantly-disposed stop pieces.

First claim

The invention claimed is:

1. A hydraulic pushing device, the hydraulic pushing device moving on a lower slide rail to push an upper slide plate disposed on the lower slide rail to shift, the hydraulic pushing device comprising:
1) a hydraulic unit;
2) a rear seat;
3) a front seat;
4) a prying mechanism;
5) an automatic adjustment mechanism; and
6) a zero-torque pushing mechanism;

wherein
the hydraulic unit and the rear seat are disposed on a platform;
the front seat is in a fixed connection to the upper slide plate via a connecting flange;
the zero-torque pushing mechanism comprises two hydraulic cylinders, one end of each of the two hydraulic cylinders is hinged to the rear seat via a third hinge pin, and the other end of each of the two hydraulic cylinders is hinged to the front seat via a second hinge pin;
the automatic adjustment mechanism comprises a control lever and two locating pieces, one end of the control lever is in a fixed connection to the front seat, and the other end of the control lever is clamped by the two locating pieces which are fixed on the rear seat;
the prying mechanism comprises two pawls, a pawl shaft, two prying guides, and two rows of equidistantly-disposed stop pieces; the pawl shaft is disposed between a baffle plate and a front round block leaning against the rear seat; the two pawls are interlocked with two ends of the pawl shaft, respectively; a middle part of each pawl is hinged to the prying guide straddling the stop pieces via a first hinge pin;
when the hydraulic cylinders lift, the pawls grasp the stop pieces tightly, and the hydraulic cylinders push the upper slide plate to move forward; and
when the hydraulic cylinders contract, the platform moves forward, under the drive of the pawl shaft, the pawls and the prying guide lean against the stop pieces and move forward until the pawls grasp next stop pieces for next cycle of pushing.

2. The device of claim 1 , wherein the prying guide employs two plates disposed at two sides of the stop piece, and the prying guide comprises a long pin hole matching the first hinge pin.

3. The device of claim 1 , wherein a lower press block is disposed at a lower part of the front round block leaning against the pawl shaft, and an upper press block is disposed at an upper part of the front round block.

4. The device of claim 1 , wherein inclined support bars in a fixed connection to the front seat are disposed at two sides of the control lever, respectively.

5. The device of claim 1 , wherein the stop pieces are fixed on the lower slide rail, and correspond to the pawl.

6. The device of claim 1 , wherein rollers are disposed at both sides of a bottom of the platform.

Assignees

• Univ Dalian Tech

Inventors

• Lin Yan
• Chen Ming
• Yu Yanyun
• Ji Zhuoshang

Classifications

• B63B71/00

  Designing vessels; Predicting their performance · CPC title

• B63C13/00

  Equipment forming part of or attachable to vessels facilitating transport over land (amphibious craft, land vehicles convertible for use on water B60F; land vehicles for carrying boats B60P; {hand carts for transporting boats B62B; } harnesses attachable to vessels for personal carrying A45F) · CPC title

• B66F3/24 Primary

  fluid-pressure operated (water-pressure machines F03B; hydraulic gearings F16H; cylinders, pistons F16J; fluid-pressure servomotors F15B) · CPC title

• B66F2700/05

  Hydraulic jacks · CPC title

• B63C3/00 Primary

  Launching or hauling-out by landborne slipways; Slipways (ship-borne guides for handling lifeboats or the like B63B23/30; cranes winches, or the like B66; ship lifting for adapting to different water levels E02C) · CPC title