Hydraulic central rotary joint
A central rotary joint and hydraulic technology, applied in the direction of pipes/pipe joints/fittings, adjustable connections, construction, etc., can solve the problems of inability to rotate 360° relative to each other, unblocked up and down, etc.
Inactive Publication Date: 2011-04-20
江阴市长龄液压机具厂
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Problems solved by technology
[0003] Before the present invention was made, the rotary body and the rotary shaft of the current hydraulic central rotary joint could not rotate 360° relative to each other, resulting in interference between the pipeline and the circuit, the upper and lower blocks were not smooth, and the oil circuits were connected in series
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Embodiment Construction
[0015] See Figure 1~4 , The hydraulic central rotary joint of the present invention includes a rotary body 3 and a rotary shaft 1. The small end of the rotary shaft 1 is axially inserted into the rotary body 3 from the rear end of the rotary body 3, and the shaft end uses a baffle 3 and a screw 6 is fixed, the rear end of the revolving body 3 is fixed and sealed with an end cover 5, bolts 7 and a sealing ring 8. The large end of the revolving shaft 1 extends out of the rear end of the revolving body 3, and the large end of the revolving shaft 1 is close to the rear end of the revolving body 3. A positioning plate 2 is fixedly connected to the outer edge of the revolving body 3; a rotary seal 9, a wear ring 10, an O-ring 11 and a dust ring 12 are installed in the annular groove on the outer edge of the rotating body 3.
[0016] Such as image 3 , The rotary shaft 1 is provided with eight main oil passage holes in the axial direction, and the oil inlets of the eight main oil passa...
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The invention relates to a hydraulic central rotary joint mainly used in the whole hydraulic system of machinery, such as large-tonnage tower cranes, and the like. The hydraulic central rotary joint comprises a rotary body (3) and a rotary shaft (1), wherein the small head end of the rotary shaft (1) is axially inserted in the rotary body (3) from the rear end of the rotary body (3), the axis end of the small head end of the rotary shaft (1) is fixed by a baffle plate, the rear end of the rotary body (3) is fixed by an end cover (5), the large head end of the rotary shaft (1) extends out of the rear end of the rotary body (3), the outer margin of the large head end of the rotary shaft (1) close to the rear end of the rotary body (3) is fixedly connected with a positioning plate (2), the rotary shaft (1) is internally and axially provided with eight main oilway holes, the oil inlets of the eight main oilway holes are all arranged at the outer margin of the large head end of the rotary shaft (1); and the rotary body (3) is radially provided with eight main oilway holes which correspond to the eight main oilway holes on the rotary shaft (1). The rotary part and the fixed part can be made to relatively rotate at 360 degrees, the pipelines are not interfered, the upper oilway and the lower oilway are smooth, and the oilways are not connected in series.
Description
(1) Technical field [0001] The invention relates to a hydraulic central rotary joint. Mainly used in the entire hydraulic system of large-tonnage full hydraulic excavators, cranes, graders, tower cranes and other machinery. It is a connecting piece that connects the hydraulic pipelines of the fixed part and the rotating part of the entire hydraulic system. (2) Background technology [0002] The upper and lower parts of hydraulic excavators, cranes, etc. need to be rotated, which causes the problem of the oil circuit connection between the rotating part and the fixed part. The hydraulic central rotary joint is used to connect the hydraulic pipelines of the fixed and rotating parts of the entire hydraulic system. The central rotary joint is composed of a rotary body, a rotary shaft and a cover. When in use, the slewing body is fixed to the lower slewing platform of the hydraulic excavator and crane machinery, and the mounting plate on the slewing shaft is connected with the slew...
Claims
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Login to View More IPC IPC(8): F16L27/087E02F9/08E02F9/22B66C23/86
Inventor 邬逵清张爱军夏泽民陈酉冰潘逸明胡健松
Owner 江阴市长龄液压机具厂