An automatic clamping structure of a pumping machine after dropping its arm

Abstract

The invention relates to an automatic clamping structure used after pumping machine arm lowering. An oil pump, a big arm oil cylinder, a first three-position four-way reversing valve and a second three-position four-way reversing valve are included. The oil pump is in pipeline connection with the first three-position four-way reversing valve and the second three-position four-way reversing valve and pumps oil to the first three-position four-way reversing valve and the second three-position four-way reversing valve. A through port A and a through port B are formed in the left side of the second three-position four-way reversing valve. A through port P and a through port T are formed in the right side of the second three-position four-way reversing valve. The oil pump is in pipe connectionto the through port T of the second three-position four-way reversing valve. The automatic clamping structure belongs to a newly-added technology; and compared with the prior art, control signals aresimple and reliable, and feedback signals are not delayed. The automatic clamping structure is simple in integral structure design, the design concept is ingenious, the economic cost is low, the principle is scientific, running is safe and reliable, and the application environment is friendly.

Description

technical field [0001] The invention relates to an automatic clamping structure of a pumping machine after dropping its arm, and belongs to the technical field of concrete machines. Background technique [0002] When the pump truck is turned into a travelable state after use, it is necessary to adjust the rotation position of the boom and then lower the boom to the support limit device. Since any rotation has an offset angle, the rotation offset angle is enlarged by the boom that is several meters long Later, the left and right deflection is larger. At present, the more traditional boom support limit device only plays the role of guiding the boom lowering, and cannot accurately limit the boom after the boom is lowered, which causes the boom to easily shake during the vehicle's driving process, affecting the stability of the vehicle. There are security risks. Therefore, it is seeking to design an automatic clamping structure after the boom of the pumping machine is lowered,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, and seek to design an automatic clamping structure after the pumping machine drops the arm, which can realize the clamping function of the traditional arm support limit device, and solve the shaking of the arm during driving. Solve the problem of large quantity, improve the stability and safety factor of the whole vehicle

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