Multi-main-chord arm support for crane
A main chord and crane technology, applied in the direction of cranes, etc., can solve the problems of structural bearing limit and application scope limitation, and achieve the effect of increasing structural bearing capacity, large structural bearing capacity, and increasing overall stiffness.
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Embodiment 1
[0048] see figure 1 , figure 2 , the crane multi-main chord jib of the present invention comprises a lower jib section 14, an intermediate jib section 12, 13 and a jib head 11 connected in sequence;
[0049] In this embodiment, the middle boom sections 12, 13 and the lower boom section 14 are multi-main chord structures, and their cross sections are rectangular. Such as Figure 3 ~ Figure 5 As shown, taking the intermediate boom section 13 as an example, the intermediate boom section 13 is provided with four main chords 131, and at the same time, one main chord is added on the side of the main chord 131 of the rectangular section of the boom section along the height direction of the boom. 131', forming a structure with eight main chords; several webs 132 are arranged between stacked main chords 131, 131' to connect each other to form a rectangular cross-section arm section, thereby forming a spatial structural system.
Embodiment 2
[0051] see Figure 6 ~ Figure 10 , which shows another embodiment of the present invention. The multi-main chord jib of the crane is similar in structure to the jib shown in Embodiment 1. The difference is that the multi-main chord intermediate jib section 13 in this embodiment (taking the intermediate jib section 13 as an example) has a rectangular cross-section, and four main chords 131 are set. A main chord 131 ′ is added in the horizontal direction on both sides, that is, along the width direction of the jib. A number of webs 132 are arranged between each main chord to form a rectangular-section jib section, thereby forming a spatial structural system.
Embodiment 3
[0053] see Figure 11 , Figure 12 , the crane multi-main chord jib of the present invention comprises a lower jib section 14, an intermediate jib section 12, 13 and a jib head 11 connected in sequence;
[0054] In this embodiment, the middle boom sections 12, 13 and the lower boom section 14 are multi-main chord structures, and their cross sections are rectangular. Such as Figure 13 ~ Figure 15As shown, taking the intermediate boom section 13 as an example, the intermediate boom section 13 is provided with four main chords 131, and at the same time, one main chord is added on the side of the main chord 131 of the rectangular section of the boom section along the height direction of the boom. 131', forming a structure with eight main chords; the main chords 131, 131' at different corners are connected by webs 132, and the main chords 131, 131' at the same corner are connected by webs 132' Connected to form a rectangular section of the arm section, thereby forming a spatial...
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