Connecting structure of oil cylinder support base and pin roll as well as mechanical device

Abstract

The invention discloses a connecting structure of an oil cylinder support base and a pin roll as well as a mechanical device. The connecting structure comprises a movable arm, a bucket rod oil cylinder, a small-cavity steel pipe, a flange, a bolt, a pin roll, a gasket, a small-cavity rubber tube, a large-cavity rubber tube, a limiting plate, a positioning bolt and an O-shaped sealing ring, wherein the bucket rod oil cylinder is connected with the pin roll; the pin roll is connected with the limiting plate; the positioning bolt is connected with the limiting plate; each of the two ends of the pin roll has two bolt installation holes; the small-cavity rubber tube and the large-cavity rubber tube are respectively arranged at the two ends of the pin roll; two inner holes are respectively vertically formed inside the pin roll; an oil slot is machined outside the pin roll; the inner holes are communicated with the oil slot; the oil slot is sealed by the O-shaped sealing ring; two connecting holes are formed in the oil cylinder support base; four small holes are formed in the surface of the oil cylinder support base; the small holes are connected with the small-cavity steel pipe. The connecting structure for the oil cylinder support base and the pin roll can be used for enabling the pin roll and the oil cylinder to have self-lubrication, so that the turning ability becomes better, and therefore, daily maintenance by coating the lubricating oil is cancelled; the rubber tubes do not move with the oil cylinder, so that the service lives of the rubber tubes are prolonged; the pin roll and the oil cylinder are compact in structure, convenient to maintain and attractive in appearance.

Description

technical field [0001] The invention relates to a pin connection structure, in particular to a connection structure and mechanical equipment between an oil cylinder support and a pin shaft. Background technique [0002] figure 1 with figure 2 It is a common connection structure between a stick cylinder and a boom in a hydraulic excavator in the prior art. The pin shaft 1.6 is welded with the limit plate 1.10, and the rotation of the pin shaft 1.6 is limited by the positioning screw 1.11; the support of the arm cylinder 1.2 and the boom are connected together by the pin shaft 1.6, and the pin shaft 1.6 only acts as the center of rotation role. The large and small cavity oil routes of the stick cylinder are composed of external rubber pipes and steel pipes. In this structure, the rubber hose 1.8 and the rubber hose 1.9 need to follow the movement of the arm cylinder 1.2 to be continuously bent and deformed. However, in the actual work of the excavator, the oil cylinder mo...

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Problems solved by technology

[0003] In view of this, the present invention proposes a connection structure and mechanical equipment between the oil cylinder support and the pin shaft to solve the problem that the above-mentioned rubber hose is continuously bent and deformed, resulting in shortened service life, high operating frequency of the oil cylinder, and frequent lubricating oil to extend the pin shaft Troublesome issues with cylinder life

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