CN203847473U - Hydraulic cylinder for hoisting - Google Patents
Hydraulic cylinder for hoisting Download PDFInfo
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- CN203847473U CN203847473U CN201420237169.4U CN201420237169U CN203847473U CN 203847473 U CN203847473 U CN 203847473U CN 201420237169 U CN201420237169 U CN 201420237169U CN 203847473 U CN203847473 U CN 203847473U
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- oil
- seal ring
- piston rod
- groove
- hydraulic cylinder
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Abstract
The utility model discloses a hydraulic cylinder for hoisting. The hydraulic cylinder comprises a cylinder block, a piston rod, a valve seat, an electromagnetic valve and an oil recharging device. The cylinder block is provided with an inner cavity, the piston rod is provided with a shaft shoulder, and the shaft shoulder is arranged in the inner cavity and divides the inner cavity into an upper oil cavity and a lower oil cavity in a sealing mode. An upper oil duct, a lower oil duct and an oil recharging oil duct are arranged in the valve seat. The upper oil duct is communicated with the upper oil cavity and an inlet of the electromagnetic valve. The lower oil duct is communicated with the lower oil cavity and an outlet of the electromagnetic valve. The oil recharging oil duct is provided with a large diameter and a small diameter, wherein the large diameter and the small diameter are communicated with each other, one end of the large diameter is sealed, and one end of the small diameter is communicated with the lower oil duct. The oil recharging device is arranged in the large diameter and comprises an elastic element and a sealing plug. The elastic element is arranged between the sealing plug and the sealed end of the large diameter. According to the hydraulic cylinder for hoisting, automatic oil recharging can be achieved, the equipment structure is simplified, and the hoisting height can be accurately adjusted.
Description
Technical field
The utility model relates to a kind of lifting oil hydraulic cylinder, relates in particular to a kind of repairing automatically, simplified apparatus structure, and the lifting oil hydraulic cylinder of energy accurate adjustment hoisting height.
Background technique
Oil hydraulic cylinder changes hydraulic energy mechanical energy into, does the hydraulic actuator of straight reciprocating motion.It is generally made up of cylinder body, piston, Sealing, oil duct etc., by oil duct, hydraulic oil is delivered in a wherein oil pocket of cylinder interior, from making two oil pockets produce hydraulic difference, and then promotes piston movement.While utilizing oil hydraulic cylinder to realize to-and-fro motion, can remove speed reducer from, and there is no drive gap, motion steadily, is therefore used widely in the hydraulic system of various machineries.Existing oil hydraulic cylinder is of a great variety, is conventionally applied to carrying or supports on large and heavy objects.
But, existing oil hydraulic cylinder need to carry out repairing to the oil pocket that produces negative pressure in the time of work, but, the recharging oil device of existing oil hydraulic cylinder is be arranged at oil hydraulic cylinder outside, therefore, the complicated structure of existing oil hydraulic cylinder, operates comparatively loaded down with trivial details, is applied on lifting appliance and just seems very difficult.
Model utility content
The purpose of this utility model is to provide a kind of repairing automatically, simplified apparatus structure, and the lifting oil hydraulic cylinder of energy accurate adjustment hoisting height.
To achieve these goals, the lifting that the utility model provides comprises cylinder body, piston rod, valve seat, solenoid valve and recharging oil device with oil hydraulic cylinder; Described cylinder body has inner chamber, and described piston rod has the shaft shoulder, the described shaft shoulder be built in described inner chamber and by described bore seal be divided into upper oil cavitie and lower oil cavitie, described piston rod stretch out described cylinder body sealed at both endsly; Described valve seat is fixed on described cylinder body outside, in described valve seat, be provided with oil duct, lower oil duct and repairing oil duct, described upper oil duct is communicated with the import of described upper oil cavitie and described solenoid valve respectively, described lower oil duct is communicated with the outlet of described lower oil cavitie and described solenoid valve respectively, and described solenoid 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 large footpath is airtight, and one end of described path is communicated with described lower oil duct; Described recharging oil device is built in described large footpath, it comprises elastic element and sealing plug, described elastic element is arranged between described sealing plug and the sealed end in described large footpath, and the elastic force that makes described sealing plug contact at the connecting end surface of described large footpath and described path is provided.
Compared with prior art, because the inner chamber of described cylinder body is divided into upper oil cavitie and lower oil cavitie by piston rod described in the utility model, and a valve seat is set, and oil duct and lower oil duct are set in described valve seat, described upper oil duct is communicated with the import of described upper oil cavitie and described solenoid valve respectively, described lower oil duct is communicated with the outlet of described lower oil cavitie and described solenoid valve respectively, thereby utilize being communicated with and closing of upper oil cavitie and lower oil cavitie described in described electromagnetic valve, make the relative described movement of cylinder block of the described piston rod of the poor control of oil pressure between described upper oil cavitie and lower oil cavitie, when described piston rod is connected with hanging device, and described cylinder body is while connecting weight, the utility model lifting can be adjusted the hoisting height of weight with oil hydraulic cylinder, and because the relatively described cylinder body of described piston rod is slowly motion, thereby can carry out accurate adjustment to hoisting height.In addition, again by repairing oil duct and recharging oil device are set in described valve seat, utilize the oil pressure in described lower oil cavitie to change, by described elastic element and sealing plug, described repairing passage is opened or closed, make that hydraulic oil in described repairing oil duct can it supplements from trend during in negative pressure at described lower oil cavitie, and at described lower oil cavitie sealing plug and fill described repairing oil duct described in automatic pushing tow during in malleation; Therefore, without outer installment recharging oil device, effectively simplify the structure of oil hydraulic cylinder, make its control more simple and convenient.
Preferably, described lifting also comprises damper with oil hydraulic cylinder, and described damper is arranged in described upper oil duct.By described damper is set, described damper can reduce the impact of hydraulic oil to lower oil cavitie, thereby avoids whole lifting oil hydraulic cylinder in the time of work, to produce fluctuation and vibration.
Particularly, described damper has water inlet, and the internal diameter of described water inlet is less than the internal diameter of described upper oil duct.Described water inlet can prevent from pouring into fast lower oil cavitie at the hydraulic oil of the rear described upper oil cavitie of solenoid directional control valve unlatching, avoid on the one hand whole lifting oil hydraulic cylinder in the time of work, to produce fluctuation and vibration, the pore size of described damper has the effect of level of control degree adjustment precision on the other hand, be that the large hydraulic flow in aperture is large, when solenoid valve is opened at every turn, piston rod movement distance is large, otherwise piston rod movement distance is little, thereby adjusts the precision that described cylinder body moves relative to described piston rod.
Particularly, in described upper oil duct, be provided with the shoulder that is plane, the end face of one end of described damper is plane, and the end face of described damper is resisted against described shoulder.
Particularly, in described upper oil duct, be provided with the shoulder that is the conical surface, the tapered structure of end face of one end of described damper, the conical surface of described cone structure is resisted against described shoulder.
Preferably, in described upper oil cavitie, be provided with lining, Compress Spring, packing ring, the first sealing configuration and the second sealing configuration, described lining and described packing ring are socketed on respectively described piston rod, described Compress Spring is arranged between described lining and described packing ring, described the first sealing configuration is arranged between the described shaft shoulder and described packing ring, and described the second sealing configuration is arranged between described lining and described cylinder body.Described packing ring can press on described the first sealing configuration on the described shaft shoulder, described lining can press on described the second sealing configuration on described cylinder body, therefore, utilize described Compress Spring can make described packing ring and described lining automatically described the first sealing configuration and the second sealing configuration are limited to position separately, prevent that described the first sealing configuration and the second sealing configuration from displacement occurring and affect sealability.
Particularly, described the first sealing configuration comprises the first seal ring, the first exterior seal ring and the first inner seal ring, the outer side surface of described the first seal ring has the first external sealed groove, inner side surface has the first interior seal groove and the first pressure side, described the first exterior seal ring is arranged in described the first external sealed groove and with the wall of described inner chamber and conflicts, described the first inner seal ring is arranged in described the first interior seal groove and with the outer side surface of described piston rod and conflicts, the outer side surface of described the first pressure side and described piston rod is Spielpassung, the area of described the first pressure side is greater than the area between described the first external sealed groove and the end face of described the first seal ring.By described the first inner seal ring and the first exterior seal ring are set, make to form static seal between described the first seal ring and described piston rod, the wall of described the first close ring and described inner chamber forms motive sealing, and, utilize the outer side surface of described the first pressure side and described piston rod to be Spielpassung, thereby the pressure that the inner side surface of described the first seal ring is subject to is greater than the pressure of outer side surface, thereby make described the first seal ring expand and press on the wall of described inner chamber, be conducive to strengthen sealability.
More specifically, described the first pressure side offers the first oil groove, and the end of described the first oil groove is run through described the first seal ring and is communicated with described upper oil cavitie.Described the first oil groove can be directed to the oil in described upper oil cavitie described the first pressure side, thereby ensures that the first pressure side is subject to oil pressure, prevents described the first seal ring and described piston rod locking and makes described the first pressure side can not be subject to oil pressure.
More specifically, described the first oil groove is spiral chute.
Particularly, described the second sealing configuration comprises the second seal ring, the second exterior seal ring and the second inner seal ring, the inner side surface of described the second seal ring has the second interior seal groove, outer side surface has the second external sealed groove and the second pressure side, described the second inner seal ring is arranged in described the second interior seal groove and with the outer side surface of described piston rod and conflicts, described the second exterior seal ring is arranged in described the second external sealed groove and with the internal face of described cylinder body and conflicts, the internal face of described the second pressure side and described cylinder body is Spielpassung, the area of described the second pressure side is greater than the area between described the second interior seal groove and the end face of described the second seal ring.By described the second inner seal ring and the second exterior seal ring are set, make to form motive sealing between described the second seal ring and described piston rod, the internal face of described the second seal ring and described cylinder body forms static seal, and, utilize the internal face of described the second pressure side and described cylinder body to be Spielpassung, thereby the pressure that the outer side surface of described the second seal ring is subject to is greater than the pressure of inner side surface, thereby make described the second seal ring press on the outer side surface of described piston rod, be conducive to strengthen sealability.
More specifically, described the second pressure side offers the second oil groove, and the end of described the second oil groove is run through described the second seal ring and is communicated with described upper oil cavitie.Described the second oil groove can be directed to the oil in described upper oil cavitie described the second pressure side, thereby ensures that the second pressure side is subject to oil pressure.
More specifically, described the second oil groove is spiral chute.
Preferably, between the neck of described cylinder body and described piston rod, be provided with guide ring.Described guide ring plays leading role to described piston rod flexible.
Preferably, be provided with dirt and scrape between the neck of described cylinder body and described piston rod, described dirt is scraped the exterior edge face place being positioned near described cylinder body.Described dirt is scraped the impurity that can clear up described piston rod outer side surface in the time that described piston rod is shunk back into described inner chamber, thereby ensures the sealability between described inner chamber.
Preferably, described cylinder body comprises main body and cylinder cap, and described cylinder cap is fixed on one end of described main body hermetically.Described cylinder body is set to the disassembly-type structure of main body and cylinder cap, can be conveniently to the utility model lifting overhaul with oil hydraulic cylinder.
Particularly, be provided with the 3rd seal 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 the 3rd seal ring and back-up ring are arranged in described the 3rd seal groove, and the internal face of described the 3rd seal ring and described main body is conflicted.Described the 3rd seal ring and back-up ring can be to sealing between described cylinder cap and described main body, thereby ensure the sealing of described lifting oil hydraulic cylinder.
Brief description of the drawings
Fig. 1 is the generalized section of the utility model lifting oil hydraulic cylinder.
Fig. 2 is the structural representation of the utility model lifting valve seat in oil hydraulic cylinder.
Fig. 3 is the sectional view of A-A direction in Fig. 1.
Fig. 4 is the sectional view of B-B direction in Fig. 2.
Fig. 5 is the sectional view of C-C direction in Fig. 2.
Fig. 6 is the structural drawing of the utility model lifting damper in oil hydraulic cylinder.
Fig. 7 is the sectional view that the utility model lifting damper in oil hydraulic cylinder is placed in upper oil duct.
Fig. 8 is the structural drawing of the utility model lifting another kind of structure of damper in oil hydraulic cylinder.
Fig. 9 is the enlarged view of D part in Fig. 1.
Figure 10 is the sectional view of the utility model lifting first seal ring in oil hydraulic cylinder.
Figure 11 is the enlarged view of E part in Fig. 1.
Figure 12 is the structural drawing of the utility model lifting second seal ring in oil hydraulic cylinder.
Embodiment
For the effect that describes technology contents of the present utility model, structure characteristics in detail, realizes, below in conjunction with mode of execution and coordinate accompanying drawing to be explained in detail.
As shown in Figures 1 to 5, the utility model lifting comprises cylinder body 1, piston rod 2, valve seat 3, solenoid valve 4, recharging oil device 5 and damper 6 with oil hydraulic cylinder 100.Described cylinder body 1 comprises main body 11 and cylinder cap 12, and described cylinder cap 12 is fixed on one end of described main body 11 hermetically, and described main body 11 is hollow structure, and both ends open, the inner inner chamber that forms when described cylinder cap 12 is connected with described main body 11; Described piston rod 2 has the shaft shoulder 21, the described shaft shoulder 21 be built in described inner chamber and by described bore seal be divided into upper oil cavitie 13 and lower oil cavitie 14, described piston rod 2 stretch out described cylinder body 1 sealed at both endsly; Particularly, 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 6 is fixed on described cylinder body 1 outside, in described valve seat 3, be provided with oil duct 31, lower oil duct 32 and repairing oil duct 33, described upper oil duct 31 respectively with the inlet seal of described upper oil cavitie 13 and described solenoid valve 4 be communicated with, described lower oil duct 32 respectively with the exit seal of described lower oil cavitie 14 and described solenoid valve 4 be communicated with, described solenoid valve 4 is fixed on described valve seat 3; Described repairing oil duct 33 has the large and small footpath 33a, the 33b that are interconnected, and one end of described large footpath 33a is airtight by locking nut 33c, and one end of described path 33b is communicated with described lower oil duct 32; Described recharging oil device 5 is built in described large footpath, and it comprises elastic element 51 and sealing plug 52, and elastic element 51 described in the utility model is Compress Spring, certainly, can have for other elastic component of return action power; Described sealing plug 52 is arranged in described large footpath 33a slidably, and described sealing plug 52 seals by O type circle 52a with the internal face of described large footpath 33a; Described elastic element 51 is arranged between described sealing plug 52 and the sealed end of described large footpath 33a, 33b, and the elastic force that makes described sealing plug 52 contact at the connecting end surface of described large footpath 33a and described path 33b is provided.
Again as shown in Figures 5 and 6, described damper 6 is arranged in described upper oil duct 31.Described damper 6 has water inlet 61, and the internal diameter of described water inlet 61 is less than the internal diameter of described upper oil duct 31.By described damper 6 is set, on described damper 6, offer water inlet 61, described water inlet 61 can prevent from pouring into fast lower oil cavitie 14 at the hydraulic oil of the rear described upper oil cavitie 13 of solenoid valve 4 unlatching, avoid on the one hand whole lifting oil hydraulic cylinder in the time of work, to produce fluctuation and vibration, the pore size of described damper 6 has the effect of level of control degree adjustment precision on the other hand, be that the large hydraulic flow in aperture is large, when solenoid valve 4 each unlatching, piston rod 2 move distances are large, otherwise piston rod 2 move distances are little, thereby adjust the precision that described cylinder body 1 moves relative to described piston rod 2.Particularly, described damper 6 also offers through hole 62, described through hole 62 is communicated with described upper oil duct 31 and water inlet 61, the internal diameter of described through hole 62 is less than the internal diameter of described upper oil duct 31 and is greater than the internal diameter of described water inlet 61, between described through hole 62 and described water inlet 61, is the structure narrowing gradually; Because described water inlet 61 internal diameters are less, described through hole 62 can facilitate the processing of water inlet 61 on the one hand, contributes on the other hand to guide hydraulic oil to enter water inlet 61.In described upper oil duct 31, be provided with the shoulder 31a that is plane, the both sides of described shoulder 31a are the oil duct of the different sizes in aperture, the end face of one end of described damper 6 is plane 63, in the time thering is oil pressure in described upper oil duct 31, the plane 63 of described damper 6 is resisted against described shoulder 31a and seals, and described water inlet 61 is communicated with the oil duct in the less aperture of described upper oil duct 31.Described shoulder 31a with the coordinating of plane 63 of described damper 6 can ensure that hydraulic oil can only flow out from described water inlet 61, thereby ensure the validity of described damper 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 end face of one end of described damper 6 is tapered structure 63 ', and the conical surface 63 ' of described cone structure is resisted against the conical surface of described shoulder 31a ', so also can reach same effect.
Refer to again Fig. 1, in described upper oil cavitie 13, be provided with lining 15, Compress Spring 16, packing ring 17, the first sealing configuration 18 and the second sealing configuration 19, described lining 15 and described packing ring 17 are socketed on respectively described piston rod 2, described Compress Spring 16 is arranged between described lining 15 and described packing ring 17, described the first sealing configuration 18 is arranged between the described shaft shoulder 21 and described packing ring 17, and described the second sealing configuration 19 is arranged between described lining 15 and described cylinder cap 12.Described packing ring 17 can press on described the first sealing configuration 18 on the described shaft shoulder 21, described lining 15 can press on described the second sealing configuration 19 on described cylinder cap 12, therefore, utilize described Compress Spring can 16 so that described packing ring 17 and described lining 15 are automatically limited to position separately by described the first sealing configuration 18 and the second sealing configuration 19, prevent that described the first sealing configuration 18 and the second sealing configuration 19 from displacement occurring and affect sealability.
Refer to Fig. 9, particularly, described the first sealing configuration 18 comprises the first seal ring 181, the first exterior seal ring 182 and the first inner seal ring 183, the outer side surface of described the first seal ring 181 has the first external sealed groove 181a, inner side surface has the first interior seal groove 181b and the first pressure side 181c, described the first exterior seal ring 182 is arranged in described the first external sealed groove 181a and with the wall of described upper oil cavitie 13 and conflicts, described the first inner seal ring 183 is arranged in described the first interior seal groove 181b and with the outer side surface of described piston rod 2 and conflicts, the outer side surface of described the first pressure side 181c and described piston rod 2 is Spielpassung, the area of described the first pressure side 2 is greater than the area between described the first external sealed groove 182 and the end face of described the first seal ring 181.By described the first inner seal ring 183 and the first exterior seal ring 181a are set, make to form static seal between described the first seal ring 181 and described piston rod 2, described the first seal ring 181 forms motive sealing with the wall of described upper oil cavitie 13, and, utilize the outer side surface of described the first pressure side 181c and described piston rod 2 to be Spielpassung, thereby the pressure that the inner side surface of described the first seal ring 181 is subject to is greater than the pressure of outer side surface, thereby make described the first seal ring 181 press on the wall of described upper oil cavitie 13, be conducive to strengthen sealability.
Again as shown in figure 10, described the first pressure side 181c offers the first oil groove 181d, and the end of described the first oil groove 181d is run through described the first seal ring 181 and is communicated with described upper oil cavitie 13.Described the first oil groove 181d can be directed to the oil in described upper oil cavitie 13 described the first pressure side 181c, thereby ensure that the first pressure side 181 is subject to oil pressure, prevent that described the first seal ring 181 from making described the first pressure side 181 can not be subject to oil pressure with described piston rod 2 lockings.Described the first oil groove 181d is spiral chute.
Refer to again Figure 11, described the second sealing configuration 19 comprises the second seal ring 191, the second exterior seal ring 192 and the second inner seal ring 193, the inner side surface of described the second seal ring 191 has the second interior seal groove 191a, outer side surface has the second external sealed groove 191b and the second pressure side 191c, described the second inner seal ring 193 is arranged in described the second interior seal groove 191a and with the outer side surface of described piston rod 2 and conflicts, described the second exterior seal ring 192 is arranged in described the second external sealed groove 191b and with the internal face of described cylinder cap 12 and conflicts, the internal face of described the second pressure side 191c and described cylinder cap 12 is Spielpassung, the area of described the second pressure side 191c is greater than the area between described the second interior seal groove 191a and the end face of described the second seal ring 191.By described the second inner seal ring 193 and the second exterior seal ring 192 are set, make to form motive sealing between described the second seal ring 191 and described piston rod 2, described the second seal ring 191 forms static seal with the internal face of described cylinder cap 12, and, utilize the internal face of described the second pressure side 191c and described cylinder cap 12 to be Spielpassung, thereby the pressure that the outer side surface of described the second seal ring 191 is subject to is greater than the pressure of inner side surface, thereby make described the second seal ring 191 press on the outer side surface of described piston rod 2, be conducive to strengthen sealability.
Refer to Figure 12, described the second pressure side 191c offers the second oil groove 191d again, and the end of described the second oil groove 191d is run through described the second seal ring 191 and is communicated with described upper oil cavitie 13.Described the second oil groove 191d can be directed to the oil in described upper oil cavitie 13 described the second pressure side 191c, thereby ensure that the second pressure side 191c is subject to oil pressure, prevent that described the second seal ring 191 from making described the second pressure side 191c can not be subject to oil pressure with described cylinder cap 12 lockings.Described the second oil groove 191d is spiral chute.
Again as shown in figure 11, between the neck of described cylinder cap 12 and described main body 11 and described piston rod 2, be respectively equipped with guide ring 7.Described guide ring 7 plays leading role to described piston rod 2 flexible.Between the neck of described cylinder cap 12 and described main body 11 and described piston rod 2, be respectively equipped with dirt and scrape 8, wherein described in one, dirt is scraped the 8 exterior edge face places that are positioned near described cylinder cap 12, and between described guide ring 7 and the exterior edge face of described cylinder cap 12.Described in another, dirt is scraped the 8 exterior edge face places that are positioned near described main body 11, and between described guide ring 7 and the exterior edge face of described main body 11.Described dirt scrapes 8 can clear up the impurity of described piston rod 2 outer side surfaces in the time that described piston rod 2 is shunk back into described inner chamber, thereby ensures the sealability between described inner chamber.
Please inferior consult Figure 11 again, cylinder body 1 described in the utility model is that the disassembly-type structure of main body 11 and cylinder cap 12 can conveniently be overhauled the utility model lifting oil hydraulic cylinder 100.Owing to needing sealing between cylinder cap 12 and main body 11, therefore, between described cylinder cap 12 and described main body 11, be also provided with the 3rd seal ring 1a and back-up ring 1b, described cylinder cap 12 is provided with the 3rd seal groove 12a, described the 3rd seal ring 1a and back-up ring 1b are arranged in described the 3rd seal groove 12a, and the internal face of described the 3rd seal ring 1a and described main body 11 is conflicted.Described the 3rd seal ring 1a and back-up ring 1b can be to sealing between described cylinder cap 12 and described main body 11, thereby ensure the sealing of described lifting oil hydraulic cylinder 100.
Comprehensive above-mentioned and by reference to the accompanying drawings, lifting described in the utility model with oil hydraulic cylinder 100 when the work in vertical state, a of described piston rod 2 end is connected with lifting appliance in upper end, b holds in lower end, the lower end of described main body 11 with lift by crane thing and be connected.Before lifting, described upper oil cavitie 13 is full of hydraulic oil, described lower oil cavitie 14 has the hydraulic oil of less hydraulic oil and lower oil duct 32 among certain pressure, therefore, the hydraulic oil of described lower oil duct 32 backs down described sealing plug 52 by described repairing oil duct 33, thereby make described elastic element 51 compress and open, and hydraulic oil is filled in described repairing oil duct 33.In the time of 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 larger hydraulic pressure under the effect of the shaft shoulder 21 of described piston rod 2, thereby stops relatively described piston rod 2 relative slidings of described main body 11.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 described lower oil cavitie 14 repairings, simultaneously, described sealing plug 52 is moved to the joint of described large footpath 33a and path 33b at the active force of described elastic element 51, by described large footpath 33a sealing.At this moment, can support lifting thing.In the time that lifting thing is thus lifted to object height top, start described solenoid valve 4, described solenoid valve 4 is opened, at this moment, described upper oil cavitie 13 is communicated with by described upper oil duct 31 and lower oil duct 32 with lower oil cavitie 14, because the pressure in described upper oil cavitie 13 is larger, 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, the pressure of described lower oil cavitie 14 inside reduces, the relatively described piston rod 2 of described main body 11 moves down slowly, thereby it is slowly mobile downwards to make to lift by crane thing, reach the object of the level height of accurate adjustment lifting thing.After lifting completes, described piston rod 2 can be exerted pressure to described lower oil cavitie 14 under the Action of Gravity Field of self, at this moment, described lower oil cavitie 14 has pressure, described the first inner seal ring 183 resiliences, no longer include decrement, be that described the first inner seal ring 183 lost efficacy, thereby form internal leakage, make the hydraulic oil in described lower oil cavitie 14 flow to described upper oil cavitie 13 by the first interior seal groove 181b, thereby the relatively described main body 11 of described piston rod 2 is moved down, and return to reset condition.
Compared with prior art, because the inner chamber of described cylinder body 1 is divided into upper oil cavitie 13 and lower oil cavitie 14 by piston rod 2 described in the utility model, and a valve seat 3 is set, and oil duct 31 and lower oil duct 32 on interior setting of described valve seat 3, described upper oil duct 31 is communicated with the import of described upper oil cavitie 13 and described solenoid valve 4 respectively, described lower oil duct 32 is communicated with the outlet of described lower oil cavitie 14 and described solenoid valve 4 respectively, thereby utilize described solenoid valve 4 to control being communicated with and closing of described upper oil cavitie 13 and lower oil cavitie 14, the relative described cylinder body 1 of the described piston rod 2 of the poor control of oil pressure between described upper oil cavitie 13 and lower oil cavitie 14 is moved, when described piston rod 2 is connected with hanging device, and described cylinder body 1 is while connecting weight, the utility model lifting can be adjusted the hoisting height of weight with oil hydraulic cylinder 100, and because the relatively described cylinder body 1 of described piston rod 2 is slowly to move, thereby can carry out accurate adjustment to hoisting height.Again by interior repairing oil duct 33 and the recharging oil device 5 of arranging of described valve seat 3, utilize the oil pressure in described lower oil cavitie 14 to change, by described elastic element 51 and sealing plug 52, described repairing passage 33 is opened or closed, make that hydraulic oil in described repairing oil duct 33 can it supplements from trend during in negative pressure at described lower oil cavitie 14, and at described lower oil cavitie 14 sealing plug 52 and fill described repairing oil duct 33 described in automatic pushing tow during in malleation; Therefore, without outer installment recharging oil device 5, effectively simplify the structure of oil hydraulic cylinder, make its control more simple and convenient.In addition, by oil duct 13 is interior on described, described damper 6 is set, thereby can prevents from producing vibration in the running of hydraulic power oil process in the utility model lifting oil hydraulic cylinder 100; Make the utility model lifting oil hydraulic cylinder 100 reach good sealing effect by described the first sealing configuration 18 and the second sealing configuration 19 are set again, can bear the pressure of superelevation, thereby, the object that quality is larger can be lifted by crane.
Above disclosed is only preferred embodiments of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim, still belongs to the scope that the utility model is contained.
Claims (16)
1. a lifting oil hydraulic cylinder, is characterized in that: comprise cylinder body, piston rod, valve seat, solenoid valve and recharging oil device; Described cylinder body has inner chamber, and described piston rod has the shaft shoulder, the described shaft shoulder be built in described inner chamber and by described bore seal be divided into upper oil cavitie and lower oil cavitie, described piston rod stretch out described cylinder body sealed at both endsly; Described valve seat is fixed on described cylinder body outside, in described valve seat, be provided with oil duct, lower oil duct and repairing oil duct, described upper oil duct is communicated with the import of described upper oil cavitie and described solenoid valve respectively, described lower oil duct is communicated with the outlet of described lower oil cavitie and described solenoid valve respectively, and described solenoid 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 large footpath is airtight, and one end of described path is communicated with described lower oil duct; Described recharging oil device is built in described large footpath, it comprises elastic element and sealing plug, described elastic element is arranged between described sealing plug and the sealed end in described large footpath, and the elastic force that makes described sealing plug contact at the connecting end surface of described large footpath and described path is provided.
2. lifting oil hydraulic cylinder as claimed in claim 1, is characterized in that: described lifting oil hydraulic cylinder also comprises damper, and described damper is arranged in described upper oil duct.
3. lifting oil hydraulic cylinder as claimed in claim 2, is characterized in that: described damper has water inlet, the internal diameter of described water inlet is less than the internal diameter of described upper oil duct.
4. lifting oil hydraulic cylinder as claimed in claim 2, is characterized in that: in described upper oil duct, be provided with the shoulder that is plane, the end face of one end of described damper is plane, and the end face of described damper is resisted against described shoulder.
5. lifting oil hydraulic cylinder as claimed in claim 2, is characterized in that: in described upper oil duct, be provided with the shoulder that is the conical surface, and the tapered structure of end face of one end of described damper, the conical surface of described cone structure is resisted against described shoulder.
6. lifting oil hydraulic cylinder as claimed in claim 1, it is characterized in that: in described upper oil cavitie, be provided with lining, Compress Spring, packing ring, the first sealing configuration and the second sealing configuration, described lining and described packing ring are socketed on respectively described piston rod, described Compress Spring is arranged between described lining and described packing ring, described the first sealing configuration is arranged between the described shaft shoulder and described packing ring, and described the second sealing configuration is arranged between described lining and described cylinder body.
7. lifting oil hydraulic cylinder as claimed in claim 6, it is characterized in that: described the first sealing configuration comprises the first seal ring, the first exterior seal ring and the first inner seal ring, the outer side surface of described the first seal ring has the first external sealed groove, inner side surface has the first interior seal groove and the first pressure side, described the first exterior seal ring is arranged in described the first external sealed groove and with the wall of described inner chamber and conflicts, described the first inner seal ring is arranged in described the first interior seal groove and with the outer side surface of described piston rod and conflicts, the outer side surface of described the first pressure side and described piston rod is Spielpassung, the area of described the first pressure side is greater than the area between described the first external sealed groove and the end face of described the first seal ring.
8. lifting oil hydraulic cylinder as claimed in claim 7, is characterized in that: described the first pressure side offers the first oil groove, and the end of described the first oil groove is run through described the first seal ring and is communicated with described upper oil cavitie.
9. lifting oil hydraulic cylinder as claimed in claim 8, is characterized in that: described the first oil groove is spiral chute.
10. lifting oil hydraulic cylinder as claimed in claim 6, it is characterized in that: described the second sealing configuration comprises the second seal ring, the second exterior seal ring and the second inner seal ring, the inner side surface of described the second seal ring has the second interior seal groove, outer side surface has the second external sealed groove and the second pressure side, described the second inner seal ring is arranged in described the second interior seal groove and with the outer side surface of described piston rod and conflicts, described the second exterior seal ring is arranged in described the second external sealed groove and with the internal face of described cylinder body and conflicts, the internal face of described the second pressure side and described cylinder body is Spielpassung, the area of described the second pressure side is greater than the area between described the second interior seal groove and the end face of described the second seal ring.
11. lifting oil hydraulic cylinders as claimed in claim 10, is characterized in that: described the second pressure side offers the second oil groove, and the end of described the second oil groove is run through described the second seal ring and is communicated with described upper oil cavitie.
12. lifting oil hydraulic cylinders as claimed in claim 11, is characterized in that: described the second oil groove is spiral chute.
13. lifting oil hydraulic cylinders as claimed in claim 1, is characterized in that: between the neck of described cylinder body and described piston rod, be provided with guide ring.
14. lifting oil hydraulic cylinders as claimed in claim 1, is characterized in that: between the neck of described cylinder body and described piston rod, be provided with dirt and scrape, described dirt is scraped the exterior edge face place being positioned near described cylinder body.
15. lifting oil hydraulic cylinders as claimed in claim 1, is characterized in that: described cylinder body comprises main body and cylinder cap, described cylinder cap is fixed on one end of described main body hermetically.
16. lifting oil hydraulic cylinders as claimed in claim 15, it is characterized in that: between described cylinder cap and described main body, be provided with the 3rd seal ring and back-up ring, described cylinder cap is provided with the 3rd seal groove, described the 3rd seal ring and back-up ring are arranged in described the 3rd seal groove, and the internal face of described the 3rd seal ring and described main body is conflicted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420237169.4U CN203847473U (en) | 2014-05-09 | 2014-05-09 | Hydraulic cylinder for hoisting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420237169.4U CN203847473U (en) | 2014-05-09 | 2014-05-09 | Hydraulic cylinder for hoisting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847473U true CN203847473U (en) | 2014-09-24 |
Family
ID=51560498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420237169.4U Withdrawn - After Issue CN203847473U (en) | 2014-05-09 | 2014-05-09 | Hydraulic cylinder for hoisting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967863A (en) * | 2014-05-09 | 2014-08-06 | 中科华核电技术研究院有限公司 | Hydraulic cylinder for lifting |
-
2014
- 2014-05-09 CN CN201420237169.4U patent/CN203847473U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967863A (en) * | 2014-05-09 | 2014-08-06 | 中科华核电技术研究院有限公司 | Hydraulic cylinder for lifting |
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