A kind of sealed hydraulic oil cylinder
The utility model relates to a kind of hydraulic jack, relates in particular to a kind of sealed hydraulic oil cylinder.
Hydraulic jack is a kind of vitals in the mechanical field extensive use, is made up of cylinder barrel, cylinder seat, piston, piston rod, safety cover, and safety cover is enclosed within the outside of cylinder barrel; At the prosopyle of the safety cover konisphere of setting up defences along the inboard, the rear end of safety cover is fixed on the upper end of piston rod, and dust ring is used for stopping extraneous dust; The dustproof effect of dust ring is that the elastic force through dust ring combines closely dust ring and cylinder barrel to realize that piston rod is in to-and-fro motion, and safety cover is to-and-fro motion also; Dust ring is just crowded to scraping attached to the dust of cylinder barrel outer surface, moisture film etc., dirts such as dust, water are stopped, but the deficiency that exists at present is: in long-term use; Some small particles can damage the sealing effect of dust ring; In the entering safety cover, on piston rod, compare under the condition of severe in external environment; Can make the piston rod plucking, excessive wear, distortion, leakage of oil; Piston rod location, steering capability reduce.
Summary of the invention
The purpose of the utility model is to overcome the problem that exists in the existing technology, good dustproof effect, long service life is provided, can effectively avoids the sealed hydraulic oil cylinder of leakage of oil.
For realizing above purpose, the technical solution of the utility model is: a kind of sealed hydraulic oil cylinder, its composition comprise cylinder barrel, cylinder seat; Cylinder seat and cylinder barrel are welded as a whole, and said cylinder seat is provided with the oily runner of turnover, in the said cylinder barrel piston is housed; One end of said piston rod is fixedly welded on the piston, and the other end passes cylinder barrel, and the top of said cylinder barrel is provided with the circular cylinder plug; Bracing ring, dust ring one and dust ring two on the said circular cylinder plug madial wall; Said bracing ring, dust ring one and dust ring two all are enclosed within on the piston rod, it is characterized in that: be provided with oil seal washer between said bracing ring and the dust ring one, be provided with seal ring between said dust ring one and the dust ring two.
Said oil seal washer and seal ring all are enclosed within on the piston rod.
The length of said circular cylinder plug is 10-25cm.
Said cylinder barrel inboard is provided with flange, and the outer wall of said circular cylinder plug is provided with draw-in groove, and the inboard flange of said cylinder barrel snaps in circular cylinder beyond the Great Wall in the draw-in groove on the wall.
Compared with prior art, the utlity model has following benefit:
1, on the basis of the former seal ring of the utility model, added an oil seal washer, cooperated with original seal ring to form two cover oil-sealing arrangements, oil sealing is effective, has effectively solved the phenomenon of cylinder body leakage of oil, has prolonged the working life of hydraulic fluid compressing cylinder.
2, on the basis of this former dust ring, add a dust ring again, can particles such as effectively preventing dust be got into the circular cylinder plug,, prolonged working life, improved the task performance of hydraulic fluid compressing cylinder so alleviated the wearing and tearing of piston rod.
Description of drawings
Fig. 1 is the utility model side-looking cross-sectional schematic.
Among the figure: turnover oil duct 1, cylinder seat 2, cylinder barrel 3, oil seal washer 4, flange 5, piston rod 6, piston 7, bracing ring 8, dust ring 1, seal ring 10, dust ring 2 11, circular cylinder plug 12.
Below in conjunction with description of drawings and embodiment the utility model is done further detailed explanation:
Referring to Fig. 1, a kind of sealed hydraulic oil cylinder, its composition comprise cylinder barrel 3, cylinder seat 2; Cylinder seat 2 is welded as a whole with cylinder barrel 3, and said cylinder seat 2 is provided with the oily runner 1 of turnover, in the said cylinder barrel 3 piston 7 is housed; One end of said piston rod 6 is fixedly welded on the piston 7, and the other end passes cylinder barrel 3, and the top of said cylinder barrel 3 is provided with circular cylinder plug 12; Bracing ring 8, dust ring 1 and dust ring 2 11 on said circular cylinder plug 12 madial walls; Said bracing ring 8, dust ring 1 and dust ring 2 11 all are enclosed within on the piston rod, it is characterized in that: be provided with oil seal washer 4 between said bracing ring 8 and the dust ring 1, be provided with seal ring 10 between said dust ring 1 and the dust ring 2 11.
Said oil seal washer 4 all is enclosed within on the piston rod with seal ring 10.
The length of said circular cylinder plug 12 is 10-25cm.
Said cylinder barrel 3 inboards are provided with flange 5, and the outer wall of said circular cylinder plug 12 is provided with draw-in groove, and said cylinder barrel 3 inboard flanges 5 snap in the draw-in groove on circular cylinder plug 12 outer walls.
Its working procedure is: the hydraulic fluid compressing cylinder is in the course of the work owing to added an oil seal washer 4 and dust ring 1; The phenomenon and the probability of leakage of oil reduce greatly; Improve the dustproof effect of hydraulic fluid compressing cylinder simultaneously, thereby prolonged the working life of hydraulic fluid compressing cylinder.