The invention relates to railway locomotive repair equipment, in particular to a cover plate apparatus for underfloor vehicle lifting jack used for examining and repairing railway vehicles.
The underfloor vehicle lifting jack is used for examination and repair of motor train units, high-speed trains, high-power locomotives or urban rail vehicles which are intact and not dismantled, including replacement of bogies for railway vehicles, examination and repair and replacement of electric installations at the bottom and top of the vehicle bodies, etc. With large-scale use of motor train units and high-speed trains in China, the underfloor vehicle lifting jack for motor train units plays an important role in high-level examination and repair of trains. For unwheeling of a motor train unit, firstly the entire train is synchronously lifted to a certain height by a bogie lift unit and the bogie is disassembled, then the railway carriage is propped up by a vehicle body lift unit.
In the process of unwheeling, both the lift pillar and the propping head part of the vehicle body lift unit elevate above the soil, hence the cover plate at ground level is provided with corresponding openings, which are not only inconvenient for examination and repair, but also bring hidden danger for personal safety of maintainers. Frequently, an inverting cover plate apparatus is used in order to block off these openings without influencing stretching and retraction of the vehicle body lift pillar. A conventional inverting cover plate has the following two structures: (1) the inverting cover plate is directly jacked up by the vehicle body lift unit, and the guide wheel on the inverting cover plate jacked up rolls along the lift pillar; this type of cover plate is applicable in the case that the propping head is basically parallel and level to the lift pillar, but not applicable in the case that the propping head is comparatively long. (2) a per pale inverting cover plate, the inverting cover plate of this structure takes up a large space, thus reducing the space for examination and repair, which is inconvenient for examination and repair of vehicles lifted.
In allusion to above-mentioned problems of the existing inverting cover plate for underfloor vehicle lifting jack, the invention provides an inverting cover plate apparatus for underfloor vehicle lifting jack which is reliable and practical in structure and safe and convenient in use.
The technical scheme of the invention is as below: a segmented inverting cover plate apparatus for an underfloor vehicle lifting jack comprises a cover plate, wherein the cover plate is of a segmented structure, and comprises a first movable cover plate and a second movable cover plate, the first movable cover plate and the second movable cover plate are hinged by means of a pin shaft; an anti-inversion block is provided directly below the pin shaft, the anti-inversion block being connected to the first movable cover plate by means of another pin shaft.
Preferentially, a guide wheel is provided below the end of the second movable cover plate away from the first movable cover plate.
Preferentially, an inverting arm is provided below the first movable cover plate, one end of the inverting arm is connected to the anti-inversion block by means of a bearing, the other end is connected to a powered push rod by means of a pin shaft and an oil-containing bearing, and the powered push rod is installed on a powered push rod mounting seat.
Preferentially, the powered push rod mounting seat is connected with the first movable cover plate.
Beneficial effect of the invention: the invention adopts a segmented structure, after the lift unit stretches out, the first movable cover plate returns to the horizontal position, the second movable cover plate leans against the lift pillar and touches with the lift pillar by means of the guide wheel. Compared with the existing inverting cover plate, the invention has the advantages as below: (1) in the process of examination and repair, when lifting or descending the lift unit, there is no need to open the inverting cover plate, which is convenient for use; (2) the first movable cover plate closed does not take up finite space for examination and repair, and reduces potential safety hazard for maintainers; (3) the vehicle body lift unit applicable for many types is also applicable to the invention no matter whether the propping head is parallel and level to the lift pillar.
Further description of the invention is made in combination with the accompanying drawings.
A segmented inverting cover plate apparatus for an underfloor vehicle lifting jack is provided, which comprises a cover plate, wherein the cover plate is of a segmented structure, and comprises a first movable cover plate 4 and a second movable cover plate 6, the first movable cover plate 4 and the second movable cover plate 6 are hinged by means of a pin shaft 15; and a guide wheel 7 is provided below the end of the second movable cover plate 6 away from the first movable cover plate 4. An anti-inversion block 5 is provided directly below the pin shaft 15. An inverting arm 3 is provided below the first movable cover plate 4, one end of the inverting arm 3 is connected to the anti-inversion block 5 by means of two bearings, the other end is connected to a powered push rod 1 by means of the pin shaft 17 and an oil-containing bearing 18, and the powered push rod 1 is installed on a powered push rod mounting seat 2. The powered push rod mounting seat 2 is connected with the first movable cover plate 4.
The working principle of the segmented inverting cover plate apparatus for an underfloor vehicle lifting jack is as follows: at off-working state, the inverting cover plate is at a horizontal position.
When the propping head 8 and the lift pillar 9 of the vehicle body lift unit elevate above the soil, the inverting cover plate begins working: (1) driven by the powered push rod 1, the inverting arm 3 drives the first movable cover plate 4 and the second movable cover plate 6 to move until inverting nearly 90 degrees; (2) the propping head 8 and the lift pillar 9 of the vehicle body lift unit raise up; (3) the powered push rod 1 drives the inverting arm 3 to retract, the guide wheel 7 on the inverting cover plate touches with lift pillar 9, the first movable cover plate 4 returns to the horizontal position, and the second movable cover plate 6 leans against the lift pillar 9.
A segmented inverting cover plate apparatus for an underfloor vehicle lifting jack includes a cover plate of a segmented structure, i.e., the cover plate includes two or more plates movably connected to each other. In the embodiment as shown in
The first movable cover plate 4 is pivotly connected with the powered push rod mounting seat 2, for example, via a pin shaft and a pin shaft seat positioned at the top of its upward extending body (See
The anti-inversion block 5 has an elongated body, extending along a direction perpendicular to the pin shaft 15. One end of the anti-inversion block 5 can be fixedly connected to the lower surface of the second movable cover plate 6, or the anti-inversion block 5 and the second movable cover plate 6 can be made integrally. The other end of the anti-inversion block 5 extends to below the lower surface of the first movable cover plate 4. When the first movable cover plate 4 and the second movable cover plate are in a coplane state, the upper surface of the anti-inversion block 5 at the other end may or may not contact the lower surface of the first movable cover plate 4.
As shown in
On the upper portion of the inner wall of each side block 21 and 22, an elongated hollow groove 20 is formed, extending in the longitudinal direction of the anti-inversion block 5. Each elongated hollow groove 20 runs parallel with, and opens to, the elongated hollow groove 14. A pair of bearings 13 is fixed to the end of the inverting arm 3. Each bearing 13 is positioned in a corresponding elongated hollow groove 20 and, when the bearing 13 slides in the corresponding elongated hollow groove 20, the inverting arm 3 slides in the elongated hollow groove 14 with the bearings 13. The elongated hollow groove 20 gradually becomes broader in the direction from the end close to the inverting arm 3 to the end away from the inverting arm 3, or at least within the portion at the end close to the inverting arm 3 gradually becomes broader. The side blocks 21 and 22 can be directed connected to the lower surface of the second movable cover plate 6, or a top wall can be provided to cover the side blocks 21 and 22, and the top wall and the side blocks 21 and 22 together define the elongated hollow groove 20. At the narrow end of the elongated hollow groove 20, the bearing 13 is tightly held by the elongated hollow groove 20 so that the bearing 13 cannot move relative to the anti-inversion block 5 (See
The working principle of the segmented inverting cover plate apparatus for an underfloor vehicle lifting jack is as follows: at off-working state, the inverting cover plate is at the level or horizontal position. At this position, pin shaft 10 abuts the left end of the groove 12 as shown in
When the propping head 8 and the lift pillar 9 of the vehicle body lift unit elevate above the ground, the inverting cover plate begins to work: (1) the powered push rod 1 extends upward and drives the inverting arm 3 to pivot around pin shaft 17, the inverting arm 3 drives the first movable cover plate 4 and the second movable cover plate 6 to move until inverting nearly 90 degrees, at this position the bearing 13 moves to the narrow end of the elongated hollow groove 20 and is tightly held by the elongated groove 20, and the pin shaft 10 moves to the right end or upper end of the groove 12 (See
Number | Date | Country | Kind |
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2012 1 0192426 | Jun 2012 | CN | national |
This application is a continuation-in-part application of, and claims the priority benefit of, U.S. application Ser. No. 14/401,502 with a 371(c) filing date of Nov. 14, 2014, now abandoned, which is a national phase application of international No. PCT/CN2013/075550 filed on May 13, 2013, which in turn claims the priority benefits of Chinese application No. 201210192426.2, filed on Jun. 13, 2012. The entirety of these prior patent applications are hereby incorporated by reference herein and made a part of this specification.
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Number | Date | Country | |
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20160060939 A1 | Mar 2016 | US |
Number | Date | Country | |
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Parent | 14401502 | US | |
Child | 14839631 | US |