CN103967863B - Lifting hydraulic cylinder - Google Patents
Lifting hydraulic cylinder Download PDFInfo
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- CN103967863B CN103967863B CN201410195301.4A CN201410195301A CN103967863B CN 103967863 B CN103967863 B CN 103967863B CN 201410195301 A CN201410195301 A CN 201410195301A CN 103967863 B CN103967863 B CN 103967863B
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Abstract
The open a kind of lifting hydraulic cylinder of the present invention, including cylinder body, piston rod, valve seat, electromagnetic valve and recharging oil device；Described cylinder body has inner chamber, and described piston rod has the shaft shoulder, and the described shaft shoulder is built in described inner chamber and described bore seal is divided into upper oil cavitie and lower oil cavitie；Be provided with oil duct, lower oil duct and repairing oil duct in described valve seat, described upper oil duct respectively with described upper oil cavitie and the inlet communication of described electromagnetic valve, described lower oil duct respectively with described lower oil cavitie and the outlet of described electromagnetic valve；Described repairing oil duct has the large and small footpath being interconnected, and the one end in described big footpath is airtight, and one end of described path connects with described lower oil duct；Described recharging oil device is built in described big footpath, and it includes between the sealed end that flexible member and sealing-plug, described flexible member are arranged at described sealing-plug and described big footpath.The present invention lifts with hydraulic cylinder energy repairing automatically, simplifies device structure, and can accurately adjust hoisting height.
Description
Technical field
The present invention relates to a kind of lifting hydraulic cylinder, particularly relate to a kind of energy repairing automatically, simplify device structure, and can accurately adjust the lifting hydraulic cylinder of hoisting height.
Background technology
Hydraulic energy is changed into mechanical energy, does the hydraulic actuator of straight reciprocating motion by hydraulic cylinder.It is usually and is made up of cylinder body, piston, sealing member, oil duct etc., is delivered to by hydraulic oil in a wherein oil pocket of cylinder interior by oil duct, from making two oil pockets produce hydraulic pressure difference, and then promotes piston movement.When utilizing hydraulic cylinder to realize moving back and forth, deceleration device can be removed from, and there is no drive gap, stable movement, therefore it is used widely in the hydraulic system of various machineries.Existing hydraulic cylinder is of a great variety, is commonly used to carrying or supports on large and heavy objects.
But, existing hydraulic cylinder operationally needs the oil pocket to producing negative pressure to carry out repairing, but, the recharging oil device of existing hydraulic cylinder is disposed on the outside of hydraulic cylinder, therefore, the complicated structure of existing hydraulic cylinder, operates relatively complicated, is applied on lifting appliance just seem extremely difficult.
Summary of the invention
It is an object of the invention to provide a kind of energy repairing automatically, simplify device structure, and can accurately adjust the lifting hydraulic cylinder of hoisting height.
To achieve these goals, the lifting hydraulic cylinder that the present invention provides includes cylinder body, piston rod, valve seat, electromagnetic valve and recharging oil device；Described cylinder body has inner chamber, and described piston rod has the shaft shoulder, and the described shaft shoulder is built in described inner chamber and described bore seal is divided into upper oil cavitie and lower oil cavitie, and described cylinder body is stretched out at the two ends of described piston rod hermetically；Described valve seat is fixed on outside described cylinder body, oil duct, lower oil duct and repairing oil duct it is provided with in described valve seat, described upper oil duct respectively with described upper oil cavitie and the inlet communication of described electromagnetic valve, described lower oil duct respectively with described lower oil cavitie and the outlet of described electromagnetic valve, described electromagnetic valve is fixed on described valve seat；Described repairing oil duct has the large and small footpath being interconnected, and the one end in described big footpath is airtight, and one end of described path connects with described lower oil duct；Described recharging oil device is built in described big footpath, it includes flexible member and sealing-plug, described flexible member is arranged between the sealed end in described sealing-plug and described big footpath, and provides the elastic force making described sealing-plug contact at described big footpath and the connecting end surface of described path.
Compared with prior art, owing to the inner chamber of described cylinder body is divided into upper oil cavitie and lower oil cavitie by piston rod of the present invention, and a valve seat is set, and oil duct and lower oil duct are set in described valve seat, by described upper oil duct respectively with described upper oil cavitie and the inlet communication of described electromagnetic valve, described lower oil duct respectively with described lower oil cavitie and the outlet of described electromagnetic valve, thus make use of described electromagnetic valve to control described upper oil cavitie and the connection of lower oil cavitie and closedown, make the poor control relative described movement of cylinder block of described piston rod of the oil pressure between described upper oil cavitie and lower oil cavitie, when described piston rod is connected with hanging device, and during described cylinder body connection weight, the present invention lifts the hoisting height that can adjust weight with hydraulic cylinder, and owing to the most described cylinder body of described piston rod is slowly motion, it is thus possible to hoisting height is accurately adjusted.Additionally, further through arranging repairing oil duct and recharging oil device in described valve seat, the oil pressure in described lower oil cavitie is utilized to change, by described flexible member and sealing-plug, described repairing passage is opened or closes, make the hydraulic oil in described repairing oil duct can when described lower oil cavitie is in negative pressure from trend its supplement, and when described lower oil cavitie is in malleation sealing-plug described in automatic pushing tow and fill described repairing oil duct；It is therefore not necessary to outside arranges recharging oil device, effectively simplify the structure of hydraulic cylinder so that it is control simpler convenience.
It is preferred that described lifting hydraulic cylinder also includes that antivibrator, described antivibrator are arranged in described upper oil duct.By arranging described antivibrator, described antivibrator can reduce the hydraulic oil impact to lower oil cavitie, thus avoids whole lifting hydraulic cylinder operationally to produce fluctuation and vibration.
Specifically, described antivibrator has inlet opening, and the internal diameter of described inlet opening is less than the internal diameter of described upper oil duct.Described inlet opening can prevent the hydraulic oil of described upper oil cavitie after solenoid directional control valve is opened from quickly pouring into lower oil cavitie, on the one hand avoid whole lifting hydraulic cylinder and operationally produce fluctuation and vibration, the pore size of the most described antivibrator has the effect controlling Level-adjusting precision, the i.e. big hydraulic flow in aperture is big, when electromagnetic valve is opened every time, piston rod movement distance is big, otherwise piston rod movement is apart from little, thus adjust the precision that described cylinder body moves relative to described piston rod.
Specifically, being provided with the shoulder in plane in described upper oil duct, the end face of one end of described antivibrator is plane, and the plane of described antivibrator is resisted against described shoulder.
Specifically, being provided with the shoulder in the conical surface in described upper oil duct, the tapered structure of end face of one end of described antivibrator, the conical surface of described pyramidal structure is resisted against described shoulder.
Preferably, lining, compression spring, packing ring, the first sealing structure and the second sealing structure it is provided with in described upper oil cavitie, described lining and described packing ring are socketed on described piston rod respectively, described compression spring is arranged between described lining and described packing ring, described first seals structure is arranged between the described shaft shoulder and described packing ring, and described second seals structure is arranged between described lining and described cylinder body.Described packing ring can seal structure by described first and press on the described shaft shoulder, described lining can seal structure by described second and press on described cylinder body, therefore, utilize described compression spring that described packing ring and described lining can be made described first automatically to seal structure and the second sealing structure is limited to respective position, prevent described first to seal structure and the second sealing structure is shifted over and affects sealing property.
Specifically, described first seals structure includes the first sealing ring, first exterior seal ring and the first inner seal ring, the lateral surface of described first sealing ring has the first external seal groove, medial surface have first in seal groove and the first pressure face, described first exterior seal ring is arranged at interior and with described inner chamber the wall of described first external seal groove and conflicts, described first inner seal ring is arranged at interior and with described piston rod the lateral surface of seal groove in described first and conflicts, described first pressure face is matched in clearance with the lateral surface of described piston rod, the area of described first pressure face is more than the area between described first external seal groove and the end face of described first sealing ring.By arranging described first inner seal ring and the first exterior seal ring, make to be formed between described first sealing ring and described piston rod static seal, described first close ring forms movable sealing with the wall of described inner chamber, and, utilizing described first pressure face is matched in clearance with the lateral surface of described piston rod, so that the medial surface pressure experienced of described first sealing ring is more than the pressure of lateral surface, so that described first sealing ring expands and presses on the wall of described inner chamber, be conducive to strengthening sealing property.
More specifically, described first pressure face offers the first oil groove, the end of described first oil groove is run through described first sealing ring and connects with described upper oil cavitie.Oil in described upper oil cavitie can be directed to described first pressure face by described first oil groove, thus ensures that the first pressure face, by oil pressure, prevents described first sealing ring and described piston rod locking and makes described first pressure face can not be by oil pressure.
More specifically, described first oil groove is helicla flute.
Specifically, described second seals structure includes the second sealing ring, second exterior seal ring and the second inner seal ring, the medial surface of described second sealing ring have second in seal groove, lateral surface has the second external seal groove and the second pressure face, described second inner seal ring is arranged at interior and with described piston rod the lateral surface of seal groove in described second and conflicts, described second exterior seal ring is arranged at interior and with described cylinder body the internal face of described second external seal groove and conflicts, described second pressure face is matched in clearance with the internal face of described cylinder body, the area of described second pressure face is more than the area in described second between seal groove and the end face of described second sealing ring.By arranging described second inner seal ring and the second exterior seal ring, make to be formed between described second sealing ring and described piston rod movable sealing, described second sealing ring forms static seal with the internal face of described cylinder body, and, utilizing described second pressure face is matched in clearance with the internal face of described cylinder body, so that the lateral surface pressure experienced of described second sealing ring is more than the pressure of medial surface, so that described second sealing ring presses on the lateral surface of described piston rod, be conducive to strengthening sealing property.
More specifically, described second pressure face offers the second oil groove, the end of described second oil groove is run through described second sealing ring and connects with described upper oil cavitie.Oil in described upper oil cavitie can be directed to described second pressure face by described second oil groove, thus ensures that the second pressure face is by oil pressure.
More specifically, described second oil groove is helicla flute.
It is preferred that be provided with guide ring between the cervical region of described cylinder body and described piston rod.The flexible of described piston rod is played guide effect by described guide ring.
Scraping it is preferred that be provided with dirt between the cervical region of described cylinder body and described piston rod, described dirt is scraped at the outer face being located close to described cylinder body.Described dirt scrapes the impurity that can clear up described piston rod lateral surface when described piston rod is shunk back into described inner chamber, thus ensures the sealing property between described inner chamber.
It is preferred that described cylinder body includes that main body and cylinder cap, described cylinder cap are sealingly fixed to one end of described main body.Described cylinder body is set to the dismountable structure of main body and cylinder cap, can facilitate and lifting hydraulic cylinder of the present invention is overhauled.
Specifically, being provided with the 3rd sealing ring and back-up ring between described cylinder cap and described main body, described cylinder cap is provided with the 3rd seal groove, and described 3rd sealing ring and back-up ring are arranged in described 3rd seal groove, and the internal face of described 3rd sealing ring and described main body is conflicted.Described 3rd sealing ring and back-up ring can seal between described cylinder cap and described main body, thus ensure the sealing of described lifting hydraulic cylinder.
Accompanying drawing explanation
Fig. 1 is the generalized section of lifting hydraulic cylinder of the present invention.
Fig. 2 is the structural representation of valve seat in lifting hydraulic cylinder of the present invention.
Fig. 3 is the sectional view in A-A direction in Fig. 1.
Fig. 4 is the sectional view in B-B direction in Fig. 2.
Fig. 5 is the sectional view in C-C direction in Fig. 2.
Fig. 6 is the structure chart of antivibrator in lifting hydraulic cylinder of the present invention.
Fig. 7 is the sectional view that in lifting hydraulic cylinder of the present invention, antivibrator is placed in oil duct.
Fig. 8 is the structure chart of the another kind of structure of antivibrator in lifting hydraulic cylinder of the present invention.
Fig. 9 is the enlarged drawing of D part in Fig. 1.
Figure 10 is the sectional view of the first sealing ring in lifting hydraulic cylinder of the present invention.
Figure 11 is the enlarged drawing of E part in Fig. 1.
Figure 12 is the structure chart of the second sealing ring in lifting hydraulic cylinder of the present invention.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature, the effect that realized in detail, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
As shown in Figures 1 to 5, lifting hydraulic cylinder 100 of the present invention includes cylinder body 1, piston rod 2, valve seat 3, electromagnetic valve 4, recharging oil device 5 and antivibrator 6.Described cylinder body 1 includes that main body 11 and cylinder cap 12, described cylinder cap 12 are sealingly fixed to one end of described main body 11, and described main body 11 is in hollow structure, and both ends open, and described cylinder cap 12 is internally formed inner chamber when being connected with described main body 11；Described piston rod 2 has the shaft shoulder 21, and the described shaft shoulder 21 is built in described inner chamber and described bore seal is divided into upper oil cavitie 13 and lower oil cavitie 14, and described cylinder body 1 is stretched out at the two ends of described piston rod 2 hermetically；Specifically, one end of described piston rod 2 is protruding through described cylinder cap 12, and the other end is protruding through described main body 11.Described valve seat 3 is fixed on outside described cylinder body 1, oil duct 31, lower oil duct 32 and repairing oil duct 33 it is provided with in described valve seat 3, the import with described upper oil cavitie 13 and described electromagnetic valve 4 respectively of described upper oil duct 31 connects hermetically, described lower oil duct 32 respectively with the exit seal of described lower oil cavitie 14 and described electromagnetic valve 4 connect, described electromagnetic valve 4 is fixed on described valve seat 3；Described repairing oil duct 33 has large and small footpath 33a, the 33b being interconnected, and one end of described big footpath 33a is airtight by locking nut 33c, and one end of described path 33b connects with described lower oil duct 32；Described recharging oil device 5 is built in described big footpath, and it includes flexible member 51 and sealing-plug 52, and flexible member 51 of the present invention is compression spring, of course, it is possible to have the elastic component of return action power for other；Described sealing-plug 52 is slidingly arranged in described big footpath 33a, and described sealing-plug 52 is sealed by O 52a with the internal face of described big footpath 33a；Described flexible member 51 is arranged between the sealed end of described sealing-plug 52 and described big footpath 33a, 33b, and provides the elastic force making connecting end surface that described sealing-plug 52 contacts at described big footpath 33a and described path 33b.
The most as shown in Figures 5 and 6, in described antivibrator 6 is arranged at described upper oil duct 31.Described antivibrator 6 has inlet opening 61, and the internal diameter of described inlet opening 61 is less than the internal diameter of described upper oil duct 31.By arranging described antivibrator 6, described antivibrator 6 offers inlet opening 61, described inlet opening 61 can prevent the hydraulic oil of described upper oil cavitie 13 after electromagnetic valve 4 is opened from quickly pouring into lower oil cavitie 14, on the one hand avoid whole lifting hydraulic cylinder and operationally produce fluctuation and vibration, the pore size of the most described antivibrator 6 has the effect controlling Level-adjusting precision, the i.e. big hydraulic flow in aperture is big, when electromagnetic valve 4 is opened every time, piston rod 2 move distance is big, otherwise piston rod 2 move distance is little, thus adjust the precision that described cylinder body 1 moves relative to described piston rod 2.Specifically, described antivibrator 6 is further opened with through hole 62, described through hole 62 connects with described upper oil duct 31 and inlet opening 61, and the internal diameter of described through hole 62 internal diameter less than described upper oil duct 31 and the internal diameter more than described inlet opening 61, in the structure gradually narrowed between described through hole 62 and described inlet opening 61；Owing to described inlet opening 61 internal diameter is less, described through hole 62 1 aspect can facilitate the processing of inlet opening 61, on the other hand contributes to guiding hydraulic oil to enter inlet opening 61.The shoulder 31a in plane it is provided with in described upper oil duct 31, the both sides of described shoulder 31a are the different size of oil duct in aperture, the end face of one end of described antivibrator 6 is plane 63, when there is oil pressure in described upper oil duct 31, the plane 63 of described antivibrator 6 is resisted against described shoulder 31a and seals, and the oil duct in the less aperture of described inlet opening 61 and described upper oil duct 31 connects.With coordinating of the plane 63 of described antivibrator 6, described shoulder 31a can ensure that hydraulic oil can only flow out from described inlet opening 61, thus ensure the effectiveness of described antivibrator 6.
As shown in Figures 7 and 8, shoulder 31a ' in upper oil duct 31 described in the utility model can also be set as the conical surface, the most tapered structure 63 ' of end face of one end of described antivibrator 6, the conical surface 63 ' of described pyramidal structure is resisted against the conical surface of described shoulder 31a ', the most also can reach same effect.
Refer to Fig. 1 again, lining 15, compression spring 16, packing ring the 17, first sealing structure 18 and the second sealing structure 19 it is provided with in described upper oil cavitie 13, described lining 15 and described packing ring 17 are socketed on described piston rod 2 respectively, described compression spring 16 is arranged between described lining 15 and described packing ring 17, described first seals structure 18 is arranged between the described shaft shoulder 21 and described packing ring 17, and described second seals structure 19 is arranged between described lining 15 and described cylinder cap 12.Described packing ring 17 can seal structure 18 by described first and press on the described shaft shoulder 21, described lining 15 can seal structure 19 by described second and press on described cylinder cap 12, therefore, utilize described compression spring described first can be prevented to seal structure 18 and second and seal structure 19 and be shifted over and affect sealing property 16 so that described packing ring 17 and described lining 15 automatically seal described first structure 18 and second and seal structure 19 and be limited to respective position.
nullRefer to Fig. 9，Specifically，Described first seals structure 18 includes the first sealing ring 181、First exterior seal ring 182 and the first inner seal ring 183，The lateral surface of described first sealing ring 181 has the first external seal groove 181a，Medial surface have first in seal groove 181b and the first pressure face 181c，Described first exterior seal ring 182 is arranged at interior and with described upper oil cavitie 13 the wall of described first external seal groove 181a and conflicts，Described first inner seal ring 183 is arranged at interior and with described piston rod 2 the lateral surface of seal groove 181b in described first and conflicts，Described first pressure face 181c is matched in clearance with the lateral surface of described piston rod 2，The area of described first pressure face 181c is more than the area between described first external seal groove 181a and the end face of described first sealing ring 181.By arranging described first inner seal ring 183 and the first exterior seal ring 182, make to be formed between described first sealing ring 181 and described piston rod 2 static seal, described first sealing ring 181 forms movable sealing with the wall of described upper oil cavitie 13, and, utilizing described first pressure face 181c is matched in clearance with the lateral surface of described piston rod 2, so that the medial surface pressure experienced of described first sealing ring 181 is more than the pressure of lateral surface, so that described first sealing ring 181 presses on the wall of described upper oil cavitie 13, be conducive to strengthening sealing property.
The most as shown in Figure 10, described first pressure face 181c offers the first oil groove 181d, and the end of described first oil groove 181d is run through described first sealing ring 181 and connects with described upper oil cavitie 13.Oil in described upper oil cavitie 13 can be directed to described first pressure face 181c by described first oil groove 181d, thus ensure that the first pressure face 181c, by oil pressure, prevents described first sealing ring 181 and the locking of described piston rod 2 and makes the described first pressure face 181c can not be by oil pressure.Described first oil groove 181d is helicla flute.
nullRefer to Figure 11 again，Described second seals structure 19 includes the second sealing ring 191、Second exterior seal ring 192 and the second inner seal ring 193，The medial surface of described second sealing ring 191 have second in seal groove 191a，Lateral surface has the second external seal groove 191b and the second pressure face 191c，Described second inner seal ring 193 is arranged at interior and with described piston rod 2 the lateral surface of seal groove 191a in described second and conflicts，Described second exterior seal ring 192 is arranged at interior and with described cylinder cap 12 the internal face of described second external seal groove 191b and conflicts，Described second pressure face 191c is matched in clearance with the internal face of described cylinder cap 12，The area of described second pressure face 191c is more than the area in described second between seal groove 191a and the end face of described second sealing ring 191.By arranging described second inner seal ring 193 and the second exterior seal ring 192, make to be formed between described second sealing ring 191 and described piston rod 2 movable sealing, described second sealing ring 191 forms static seal with the internal face of described cylinder cap 12, and, utilizing described second pressure face 191c is matched in clearance with the internal face of described cylinder cap 12, so that the lateral surface pressure experienced of described second sealing ring 191 is more than the pressure of medial surface, so that described second sealing ring 191 presses on the lateral surface of described piston rod 2, be conducive to strengthening sealing property.
Referring to Figure 12, described second pressure face 191c again and offer the second oil groove 191d, the end of described second oil groove 191d is run through described second sealing ring 191 and connects with described upper oil cavitie 13.Oil in described upper oil cavitie 13 can be directed to described second pressure face 191c by described second oil groove 191d, thus ensure that the second pressure face 191c, by oil pressure, prevents described second sealing ring 191 and the locking of described cylinder cap 12 and makes the described second pressure face 191c can not be by oil pressure.Described second oil groove 191d is helicla flute.
The most as shown in figure 11, it is respectively equipped with guide ring 7 between described cylinder cap 12 and the cervical region of described main body 11 and described piston rod 2.Described the flexible of piston rod 2 is played guide effect by described guide ring 7.Being respectively equipped with dirt between described cylinder cap 12 and the cervical region of described main body 11 and described piston rod 2 and scrape 8, wherein dirt described in one is scraped at 8 outer faces being located close to described cylinder cap 12, and between described guide ring 7 and the outer face of described cylinder cap 12.Another described dirt is scraped at 8 outer faces being located close to described main body 11, and between described guide ring 7 and the outer face of described main body 11.Described dirt scrapes 8 impurity that can clear up described piston rod 2 lateral surface when described piston rod 2 is shunk back into described inner chamber, thus ensures the sealing property between described inner chamber.
Again please be time refering to Figure 11, heretofore described cylinder body 1 is that the dismountable structure of main body 11 and cylinder cap 12 can facilitate and overhauls lifting hydraulic cylinder 100 of the present invention.Owing to needing to seal between cylinder cap 12 and main body 11, therefore, it is additionally provided with the 3rd sealing ring 1a and back-up ring 1b between described cylinder cap 12 and described main body 11, described cylinder cap 12 is provided with the 3rd seal groove 12a, described 3rd sealing ring 1a and back-up ring 1b is arranged in described 3rd seal groove 12a, and the internal face of described 3rd sealing ring 1a and described main body 11 is conflicted.Described 3rd sealing ring 1a and back-up ring 1b can seal between described cylinder cap 12 and described main body 11, thus ensures the sealing of described lifting hydraulic cylinder 100.
Summary also combines accompanying drawing, and lifting hydraulic cylinder 100 of the present invention is operationally in vertical state, and a end of the most described piston rod 2 is in upper end and is connected with lifting appliance, and b end is in lower end, and the lower end of described main body 11 is connected with lifting thing.Before lifting, described upper oil cavitie 13 is full of hydraulic oil, the hydraulic oil that described lower oil cavitie 14 has less hydraulic oil and lower oil duct 32 is among certain pressure, therefore, described sealing-plug 52 is backed down by the hydraulic oil of described lower oil duct 32 by described repairing oil duct 33, so that described flexible member 51 compresses and opens, and hydraulic oil is made to fill in described repairing oil duct 33.When lifting, lifting appliance produces pulling force upwards to described piston rod 2, lifting thing produces downward pulling force to described main body 11, at this moment, hydraulic oil in described upper oil cavitie 13 produces bigger hydraulic pressure under the effect of the shaft shoulder 21 of described piston rod 2, thus stops the described the most described piston rod of main body 11 2 relatively to slide.Meanwhile, described lower oil cavitie 14 produces negative pressure, at this moment, described in hydraulic oil automatic stream in described lower oil duct 32 and repairing oil duct 33, lower oil cavitie 14 is to the repairing of described lower oil cavitie 14, simultaneously, described sealing-plug 52 is moved to the junction of described big footpath 33a and path 33b at the active force of described flexible member 51, is sealed by described big footpath 33a.At this moment, lifting thing can be supported.When lifting by crane thing and being thus lifted to above object height, start described electromagnetic valve 4, described electromagnetic valve 4 is made to open, at this moment, described upper oil cavitie 13 is connected by described upper oil duct 31 and lower oil duct 32 with lower oil cavitie 14, owing to the pressure in described upper oil cavitie 13 is bigger, therefore, hydraulic oil in described upper oil cavitie 13 flows to described lower oil cavitie 14 through described upper oil duct 31 and lower oil duct 32, now, pressure within described lower oil cavitie 14 reduces, the described the most described piston rod of main body 11 2 moves down slowly, so that lifting thing slowly moves downward, reach accurately to adjust the purpose of the level height of lifting thing.After lifting completes, described piston rod 2 can apply pressure to described lower oil cavitie 14 under the action of gravity of self, at this moment, described lower oil cavitie 14 has pressure, described first inner seal ring 183 resilience, no longer there is decrement, the most described first inner seal ring 183 lost efficacy, thus formed internal leakage, made hydraulic oil in described lower oil cavitie 14 flow to described upper oil cavitie 13 by seal groove 181b in first, so that the described the most described main body of piston rod 2 11 moves down, and return to initial condition.
nullCompared with prior art，Owing to the inner chamber of described cylinder body 1 is divided into upper oil cavitie 13 and lower oil cavitie 14 by piston rod 2 of the present invention，And a valve seat 3 is set，And oil duct 31 and lower oil duct 32 are set in described valve seat 3，By described upper oil duct 31 respectively with described upper oil cavitie 13 and the inlet communication of described electromagnetic valve 4，Described lower oil duct 32 respectively with described lower oil cavitie 14 and the outlet of described electromagnetic valve 4，Thus utilize described electromagnetic valve 4 to control described upper oil cavitie 13 and the connection of lower oil cavitie 14 and closedown，The poor control relative described cylinder body 1 of described piston rod 2 of the oil pressure between described upper oil cavitie 13 and lower oil cavitie 14 is made to move，When described piston rod 2 is connected with hanging device，And described cylinder body 1 is when connecting weight，The present invention lifts the hoisting height that can adjust weight with hydraulic cylinder 100，And owing to the described the most described cylinder body of piston rod 21 is slowly motion，It is thus possible to hoisting height is accurately adjusted.Further through arranging repairing oil duct 33 and recharging oil device 5 in described valve seat 3, the oil pressure in described lower oil cavitie 14 is utilized to change, by described flexible member 51 and sealing-plug 52, described repairing passage 33 is opened or closes, make the hydraulic oil in described repairing oil duct 33 can when described lower oil cavitie 14 is in negative pressure from trend its supplement, and when described lower oil cavitie 14 is in malleation sealing-plug 52 described in automatic pushing tow and fill described repairing oil duct 33；It is therefore not necessary to outside arranges recharging oil device 5, effectively simplify the structure of hydraulic cylinder so that it is control simpler convenience.It addition, by arranging described antivibrator 6 on described in oil duct 13, thus during the running of hydraulic power oil in lifting hydraulic cylinder 100 of the present invention can be prevented, produce vibration；Seal structure 18 and second and seal structure 19 further through arranging described first and make lifting hydraulic cylinder 100 of the present invention reach good sealing effectiveness, the pressure of superelevation can be born, therefore, it is possible to the object that lifting quality is bigger.
The above disclosed preferred embodiments being only the present invention, certainly can not limit the interest field of the present invention, the equivalent variations therefore made according to scope of the present invention patent with this, still fall within the scope that the present invention is contained.
Claims (16)
1. a lifting hydraulic cylinder, it is characterised in that: include cylinder body, piston rod, valve seat, electromagnetic valve and repairing dress
Put；Described cylinder body has inner chamber, and described piston rod has the shaft shoulder, and the described shaft shoulder is built in described inner chamber and incites somebody to action
Being divided into described bore seal upper oil cavitie and lower oil cavitie, described cylinder body is stretched out at the two ends of described piston rod hermetically；
Described valve seat is fixed on outside described cylinder body, is provided with oil duct, lower oil duct and repairing oil duct in described valve seat,
Described upper oil duct respectively with described upper oil cavitie and the inlet communication of described electromagnetic valve, described lower oil duct respectively with institute
Stating lower oil cavitie and the outlet of described electromagnetic valve, described electromagnetic valve is fixed on described valve seat；Described repairing
Oil duct has the large and small footpath being interconnected, and the one end in described big footpath is airtight, one end of described path and institute
State the connection of lower oil duct；Described recharging oil device is built in described big footpath, and it includes flexible member and sealing-plug,
Described flexible member is arranged between the sealed end in described sealing-plug and described big footpath, and offer makes described sealing
Plug contacts at the elastic force in described big footpath and the connecting end surface of described path.
2. lifting hydraulic cylinder as claimed in claim 1, it is characterised in that: described lifting hydraulic cylinder also includes resistance
Buddhist nun's device, described antivibrator is arranged in described upper oil duct.
3. lifting hydraulic cylinder as claimed in claim 2, it is characterised in that: described antivibrator has inlet opening, institute
State the internal diameter internal diameter less than described upper oil duct of inlet opening.
4. lifting hydraulic cylinder as claimed in claim 2, it is characterised in that: it is provided with in plane in described upper oil duct
Shoulder, the end face of one end of described antivibrator is plane, and the plane of described antivibrator is resisted against described shoulder.
5. lifting hydraulic cylinder as claimed in claim 2, it is characterised in that: it is provided with in the conical surface in described upper oil duct
Shoulder, the tapered structure of end face of one end of described antivibrator, the conical surface of described pyramidal structure is resisted against described
Shoulder.
6. lifting hydraulic cylinder as claimed in claim 1, it is characterised in that: it is provided with lining, pressure in described upper oil cavitie
Contracting spring, packing ring, the first sealing structure and second seal structure, and described lining and described packing ring are socketed respectively
In described piston rod, described compression spring is arranged between described lining and described packing ring, and described first seals
Structure is arranged between the described shaft shoulder and described packing ring, and described second seals structure is arranged at described lining and institute
State between cylinder body.
7. lifting hydraulic cylinder as claimed in claim 6, it is characterised in that: described first seals structure includes first
Sealing ring, the first exterior seal ring and the first inner seal ring, the lateral surface of described first sealing ring has outside first
Seal groove, medial surface have first in seal groove and the first pressure face, described first exterior seal ring is arranged at institute
Stating in the first external seal groove and conflict with the wall of described inner chamber, described first inner seal ring is arranged at described the
In one, interior and with described piston rod the lateral surface of seal groove is conflicted, described first pressure face and described piston rod
Lateral surface is matched in clearance, and the area of described first pressure face is more than being positioned at described first external seal groove with described
Area between the end face of the first sealing ring.
8. lifting hydraulic cylinder as claimed in claim 7, it is characterised in that: described first pressure face offers first
Oil groove, the end of described first oil groove is run through described first sealing ring and connects with described upper oil cavitie.
9. lifting hydraulic cylinder as claimed in claim 8, it is characterised in that: described first oil groove is helicla flute.
10. lifting hydraulic cylinder as claimed in claim 6, it is characterised in that: described second sealing structure includes the
Two sealing rings, the second exterior seal ring and the second inner seal ring, the medial surface of described second sealing ring has second
Interior seal groove, lateral surface has the second external seal groove and the second pressure face, and described second inner seal ring is arranged at
In described second, interior and with described piston rod the lateral surface of seal groove is conflicted, and described second exterior seal ring is arranged at
Interior and with described cylinder body the internal face of described second external seal groove is conflicted, described second pressure face and described cylinder body
Internal face be matched in clearance, the area of described second pressure face is more than seal groove in described second and described the
Area between the end face of two sealing rings.
11. lifting hydraulic cylinders as claimed in claim 10, it is characterised in that: described second pressure face offers
Two oil grooves, the end of described second oil groove is run through described second sealing ring and connects with described upper oil cavitie.
12. lifting hydraulic cylinders as claimed in claim 11, it is characterised in that: described second oil groove is helicla flute.
13. lifting hydraulic cylinders as claimed in claim 1, it is characterised in that: the cervical region of described cylinder body and described work
Guide ring it is provided with between stopper rod.
14. lifting hydraulic cylinders as claimed in claim 1, it is characterised in that: the cervical region of described cylinder body and described work
Being provided with dirt between stopper rod to scrape, described dirt is scraped at the outer face being located close to described cylinder body.
15. lifting hydraulic cylinders as claimed in claim 1, it is characterised in that: described cylinder body includes main body and cylinder cap,
Described cylinder cap is sealingly fixed to one end of described main body.
16. lifting hydraulic cylinders as claimed in claim 15, it is characterised in that: between described cylinder cap and described main body
Being provided with the 3rd sealing ring and back-up ring, described cylinder cap is provided with the 3rd seal groove, and described 3rd sealing ring and back-up ring set
It is placed in described 3rd seal groove, and the internal face of described 3rd sealing ring and described main body is conflicted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195301.4A CN103967863B (en) | 2014-05-09 | 2014-05-09 | Lifting hydraulic cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195301.4A CN103967863B (en) | 2014-05-09 | 2014-05-09 | Lifting hydraulic cylinder |
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| CN103967863A CN103967863A (en) | 2014-08-06 |
| CN103967863B true CN103967863B (en) | 2016-08-24 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759870A (en) * | 2015-03-10 | 2015-07-08 | 常州格林电力机械制造有限公司 | Horizontal limiting device for bolt drawing machine |
| JP6209550B2 (en) * | 2015-03-20 | 2017-10-04 | Ｋｙｂ株式会社 | Single acting hydraulic cylinder |
| CN106286471B (en) * | 2015-05-20 | 2018-06-12 | 徐工集团工程机械股份有限公司 | It is oriented to buffer unit, hydraulic cylinder and excavator |
| CN108953285A (en) * | 2018-09-30 | 2018-12-07 | 安徽优源液压科技有限公司 | A kind of lifting special piston cylinder |
| CN112682385B (en) * | 2020-12-31 | 2023-07-14 | 临沂市弘达机械有限公司 | Self-cleaning tunneling hydraulic cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3238564B2 (en) * | 1994-03-10 | 2001-12-17 | 三菱農機株式会社 | Hydraulic control device for tractor |
| CN2240065Y (en) * | 1995-04-14 | 1996-11-13 | 牛仁臣 | Self-controlling hydraulic oil cylinder |
| US6205619B1 (en) * | 1998-09-17 | 2001-03-27 | Jang Jong-Bok | Hydraulic automatic-shock-absorbing hinge device |
| CN201575000U (en) * | 2009-10-29 | 2010-09-08 | 崔书林 | Stroke limit unloading valve for oil cylinder pistons |
| CN203847473U (en) * | 2014-05-09 | 2014-09-24 | 中科华核电技术研究院有限公司 | Hydraulic cylinder for hoisting |
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Address after: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Co-patentee after: China General Nuclear Power Corporation Patentee after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Address before: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Co-patentee before: China General Nuclear Power Corporation Patentee before: Zhongkehua Nuclear Power Technology Institute Co., Ltd. |
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