Bridge Expansion and Contraction Device and Installation Method Therefor

A bridge expansion and contraction device, which is disposed between an end (3) of a first beam and an end (4) of a second beam, comprising:

• a gap crossing plate (1) connected to the first beam and crossing over a gap between the first beam and the second beam;
• a fixed plate (2) being engaged with the gap crossing plate (1) and connected to the second beam;
• one or more height adjustment assemblies (5);
• one or more lower support base assemblies (6);
• a rotating shaft assembly (7);
• and
• one or more upper pressing assemblies (8);
• wherein,
• the first beam has a first mounting recess (31) at the end (3) of the first beam for receiving the gap crossing plate (1), the second beam has a second mounting recess (41) at the end (4) of the second beam for receiving the fixed plate (2);
• the one or more height adjustment assemblies (5), the one or more lower support base assemblies (6), the rotating shaft assembly (7) and the one or more upper pressing assemblies (8) are disposed in the first mounting recess (31);
• each height adjustment assembly (5) is disposed inside the first mounting recess (31), each lower support base assembly (6) is connected to one corresponding height adjustment assembly (5), the rotating shaft assembly (7) extending along a width of the bridge is supported on the one or more lower support base assemblies (6), each upper pressing assembly (8) is connected to the one corresponding height adjustment assembly (5) and located above the aforementioned lower support base assembly (6) and presses the rotating shaft assembly (7).