An outrigger and a pump truck
A technology of outrigger arms and telescopic outriggers, which is applied in the field of outriggers and pump trucks equipped with the outriggers, which can solve the problems of damaged pipelines and large space requirements for outriggers, so as to prevent oil circuit damage and reduce occupied space Effect
Active Publication Date: 2016-04-06
SANY AUTOMOBILE MFG CO LTD
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Problems solved by technology
[0005] In view of this, the present invention aims to propose an outrigger and a pump truck to solve the problem that the oil passages of the outrigger arm telescopic oil cylinder and the lower support oil cylinder of the existing outrigger are independently set, which results in a large requirement for the inner space of the outrigger or the need for pipes. road damage
Method used
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[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the description and sequence of specific structures in this section are only descriptions of specific embodiments, and should not be considered as limiting the protection scope of the present invention.
[0027] In the embodiment of the present invention, oil passages communicating with the rod chamber and the rodless chamber are provided in the piston rods of the first oil cylinder and the second oil cylinder of the telescopic oil cylinder of the outrigger arm, and then the oil passage is connected with the oil pipe in series to lower the oil cylinder , the telescopic oil cylinder of the outrigger arm and the lower support oil cylinder are integrated into one structure, and only one oil circuit ...
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The invention provides an outrigger and a pump truck. The outrigger includes an outrigger mounting seat and at least one telescopic outrigger arm. A telescopic oil cylinder for the outrigger arm is arranged between the outrigger mounting seat and the telescopic outrigger arm. The telescopic outrigger The end of the arm is provided with a lower support cylinder, and the two oil inlets and outlets on the outrigger arm telescopic cylinder for connecting with the external oil source are set at the end close to the outrigger mounting seat, and the outer end of the piston rod of the outrigger arm telescopic cylinder is provided with a The two oil inlets and outlets of the lower support cylinder are connected to the two ports of the outrigger telescopic cylinder through the oil passage and the rod chamber and rodless chamber of the outrigger telescopic cylinder. oil inlet and outlet. By connecting the outrigger arm telescopic oil cylinder and the lower support oil cylinder in series, one oil circuit is used to reduce the occupied space, and the lower support oil cylinder does not need to use a rubber hose that expands and contracts with the outrigger arm, so as to prevent the oil circuit of the lower support oil cylinder from being damaged.
Description
technical field [0001] The invention relates to an outrigger device, in particular to an outrigger and a pump truck equipped with the outrigger. Background technique [0002] At present, the front outriggers of concrete pump trucks are usually telescopic outriggers. The outrigger arm usually uses the outrigger arm telescopic oil cylinder to realize the telescopic action, and the lower support oil cylinder is used to support the whole vehicle. The supply and return of the lower support oil cylinder and the outrigger arm telescopic oil cylinder The oil lines are independent of each other and are all arranged on the front outrigger arms. Because the lower support oil cylinder is installed on the end of the front outrigger arm, it moves along with the expansion and contraction of the front outrigger arm, so that the oil circuit for the oil supply to the lower support oil cylinder must also be able to expand and contract accordingly. At present, the oil pipe for supplying oil to...
Claims
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IPC IPC(8): B60S9/10
Inventor 卿建喜朱利军方金龙
Owner SANY AUTOMOBILE MFG CO LTD