Four-degree-of-freedom accurate hoisting carrier loader for under-train parts of motor train unit

Abstract

The invention discloses a four-degree-of-freedom accurate hoisting carrier loader for under-train parts of a motor train unit, and belongs to the technical field of under-train part carrying equipment in the rail transit vehicle assembling stage. The four-degree-of-freedom accurate hoisting carrier loader is provided with a bottom frame; a bearing platform is arranged above the bottom frame; a movable layer comprises a movable layer, a rotating layer and a lifting layer; the lower part of the movable layer is in sliding connection with the bottom frame, and the upper part is rotationally connected with the rotating layer; the upper part of the rotating layer supports the lifting layer to lift along the Z-axis through a bracket; a bearing table is slidably connected to the lifting layer; the movable layer further comprises transmission mechanisms distributed between the bottom frame and the movable layer, between the movable layer and the rotating layer and between the rotating layer and the bearing platform, and the transmission mechanisms are used for enabling the bearing platform to move along the X axis, rotate and move along the XY plane, ascend and descend along the Z axis and move along the Y axis. The four-degree-of-freedom accurate hoisting carrier loader can realize accurate adjustment on vehicle lower part positions in four freedom degrees, the structure is simple, operation is stable and reliable, time and labor are saved, and the working efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of carrying equipment for undercarriage components in the assembly stage of rail transit vehicles, in particular to a four-degree-of-freedom precise hoisting and carrying vehicle for undercarriage components of an EMU. Background technique [0002] In the structural design of the EMU, the parts under the car are installed in the way of chute-slider-fastener-part lifting lug, and the parts are carried to the approximate position under the car by a four-wheel trolley, and then installed after being lifted to the corresponding height. Because the trolley carrying the components cannot be accurately positioned during this process, it is common for the bolt holes of the lifting lugs to be out of alignment with the sliders in the chute after the components are raised and lowered. Because the mass of the components under the vehicle can reach several tons (such as traction transformers) ≥5 tons), the pulleys of the...

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Problems solved by technology

[0002] In the structural design of the EMU, the parts under the car are installed in the way of chute-slider-fastener-part lifting lug, and the parts are carried to the approximate position under the car by a four-wheel trolley, and then installed after being lifted to the corresponding height. Because the trolley carrying the components cannot be accurately positioned during this process, it is common for the bolt holes of the lifting lugs to be out of alignment with the sliders in the chute after the components are raised and lowered. Because the mass of the components under the vehicle can reach several tons (such as traction transformers) ≥5 tons), the pulleys of the trolley are difficult to move flexibly in a small area. Usually, three to five people in the team work together to push the trolley, and it is difficult to move the components on the trolley according to the drawings. There is a risk of scratching the thread of the fastener. If there are other components installed in the immediate vicinity of the installation component, the space for operation is very small, and there is a risk of damage to the cable of the component during the position adjustment process, because the positioning size of the component installation needs to be met. , it is often necessary to fasten and disassemble the bolts multiple times. Although the selection of the bolts takes into account the issue of safety redundancy in the design stage, the bolts are repeatedly stretched during the disassembly process, and there is a risk of reduced service life and premature failure;

[0003] In the prior art, if attached Figure 12 As shown, the component carrying trolleys are mostly mechanical cross lift vehicles, and the pneumatic lifting hovercars are used for larger components. However, the above component carrying trolleys and hovercars can only adjust a single degree of freedom in the vertical direction, which is inconvenient to use , cannot be accurately positioned, and is labor-intensive, time-consuming and labor-intensive;

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