Extension and retraction mechanism and support leg extension and retraction system for concrete pump truck
The technology of a concrete pump truck and a telescopic mechanism is applied in the directions of vehicle maintenance, lifting vehicle accessories, transportation and packaging.
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[0057] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.
[0058] The embodiment of the present invention provides a telescopic mechanism with fast telescopic speed, small space occupation, simple structure, not easy to be damaged, and easier maintenance, and a concrete pump truck leg telescopic system provided with the telescopic mechanism.
[0059] Such as Figure 2 ~ Figure 6 As shown, the telescopic mechanism provided by the embodiment of the present invention includes figure 2 The first moving part shown ( figure 2 The middle is the first-level telescopic outrigger) 21, the second moving part ( figure 2 The middle is the secondary telescopic leg) 22. The seat body ( figure 2 The center is the rotating base) 23. Telescopic device ( figure 2 Take the oil cylinder as an example) 24 and the first-stage linkage structure 25, in which:
[0060] The telescopic device 24 includes a first mem...
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