CN204493344U - Core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist - Google Patents
Core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist Download PDFInfo
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- CN204493344U CN204493344U CN201520024653.3U CN201520024653U CN204493344U CN 204493344 U CN204493344 U CN 204493344U CN 201520024653 U CN201520024653 U CN 201520024653U CN 204493344 U CN204493344 U CN 204493344U
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- telescopic oil
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Abstract
The utility model relates to a kind of core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist, core pipe telescopic oil cylinder comprises: telescopic oil cylinder cylindrical shell, core tube cylinder, telescopic oil cylinder piston rod and core pipe piston rod, and telescopic oil cylinder piston rod and core pipe piston rod slide respectively in telescopic oil cylinder cylindrical shell and core tube cylinder; Core tube cylinder is coaxially arranged in the hollow structure of telescopic oil cylinder piston rod; Core tube cylinder and core pipe piston rod are fixed with telescopic oil cylinder piston rod and telescopic oil cylinder cylindrical shell respectively, or fix with telescopic oil cylinder cylindrical shell and telescopic oil cylinder piston rod respectively; Be provided with the first core pipe oil duct of the loculus by way of core tube cylinder between first hydraulic fluid port of telescopic oil cylinder piston rod and the 3rd hydraulic fluid port of telescopic oil cylinder cylindrical shell, between the second hydraulic fluid port of telescopic oil cylinder piston rod and the 4th hydraulic fluid port of telescopic oil cylinder cylindrical shell, be provided with the second core pipe oil duct by way of the large chamber of core tube cylinder.The utility model can reduce design difficulty and improve reliability.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist.
Background technique
Current hoist is mostly single cylinder bolt-type hoist, as shown in Figure 1, it is the Telescopic being realized semi-girder by the cylinder barrel 3a of telescopic oil cylinder and the combinative movement of arm pin 1a and cylinder pin 5a, and each joint semi-girder is equipped with arm pin-and-hole 2a, for realizing locking and the unblock of adjacent two joint semi-girders; The end of cylinder barrel 3a arranges cylinder head 4a, cylinder head 4a installs cylinder pin 5a, for realizing locking and the unblock of semi-girder and cylinder barrel 3a.
The telescopic oil cylinder of single-cylinder bolt hoist not only bears the effect driving hoisting arm expansion, and also will provide oil sources for next stage actuator, core pipe is exactly a solution wherein.Core pipe is arranged in the middle of telescopic oil cylinder, is in fact exactly a set of telescopic pipeline, and hidden at inside retractable cylinder, makes overall structure compact.
The telescopic oil cylinder of belt carcass pipe of the prior art, structural representation as shown in Figure 2, comprise: telescopic oil cylinder piston rod 7a slides in telescopic oil cylinder cylinder barrel 8a, and telescopic oil cylinder cylinder barrel 8a is separated into loculus 9a and large chamber 10a, the rod end of telescopic oil cylinder piston rod 7a is provided with telescopic oil cylinder loculus filler opening 14a and telescopic oil cylinder large chamber filler opening 12a, is respectively loculus 9a and large chamber 10a fuel feeding.Telescopic oil cylinder piston rod 7a inside is provided with core pipe, and core pipe filler opening 13a is opened on the exterior edge face of telescopic oil cylinder piston rod 7a, and core pipe oil outlet 11a is opened on the exterior edge face of telescopic oil cylinder cylinder barrel 8a.
As can be seen from Figure 2, core pipe only provides road binders source or an oil return, Fig. 3 is the hydraulic system principle figure adopting single-core tube telescopic oil cylinder fuel feeding, the fluid that core pipe oil outlet 11a draws controls cylinder pin oil cylinder 15a and arm pin oil cylinder 16a, switched by oil duct pressure when commutating and realize, and need to coordinate spring reset, because arm cross section is less, the design space of Returnning spring is restricted, make design difficulty larger, the reposition force deficiency of spring may be made or shorten fatigue life, and then reliability is reduced.
Summary of the invention
The purpose of this utility model proposes a kind of core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist, can reduce design difficulty and improve reliability.
For achieving the above object, the utility model first aspect provides a kind of core pipe telescopic oil cylinder, comprise: telescopic oil cylinder cylindrical shell 10, core tube cylinder 17, telescopic oil cylinder piston rod 9 and core pipe piston rod 16, described telescopic oil cylinder piston rod 9 can slide in described telescopic oil cylinder cylindrical shell 10, and described core pipe piston rod 16 can slide in described core tube cylinder 17; Described telescopic oil cylinder piston rod 9 is hollow structure, and described core tube cylinder 17 is coaxially arranged in the hollow structure of described telescopic oil cylinder piston rod 9;
Described core tube cylinder 17 and core pipe piston rod 16 are fixed with described telescopic oil cylinder piston rod 9 and described telescopic oil cylinder cylindrical shell 10 respectively, or described core tube cylinder 17 and core pipe piston rod 16 are fixed with described telescopic oil cylinder cylindrical shell 10 and described telescopic oil cylinder piston rod 9 respectively;
The rod end of described telescopic oil cylinder piston rod 9 is provided with the first hydraulic fluid port 21 and the second hydraulic fluid port 20, the bottom of described telescopic oil cylinder cylindrical shell 10 is provided with the 3rd hydraulic fluid port 13 and the 4th hydraulic fluid port 14, between described first hydraulic fluid port 21 and described 3rd hydraulic fluid port 13, be provided with the first core pipe oil duct A of the loculus 15 by way of described core tube cylinder 17, between described second hydraulic fluid port 20 and described 4th hydraulic fluid port 14, be provided with the second core pipe oil duct B by way of the large chamber 18 of described core tube cylinder 17.
Further, described first core pipe oil duct A comprises: be opened in described telescopic oil cylinder piston rod 9 and the first oil pipe 31 interconnected in described core tube cylinder 17, described loculus 15 and be opened in the second oil pipe 32 be communicated with described 3rd hydraulic fluid port 13 in described core pipe piston rod 16, described first oil pipe 31 can be communicated with described second oil pipe 32 by described loculus 15.
Further, described second core pipe oil duct B comprises: be opened in described first hydraulic fluid port 21 in described telescopic oil cylinder piston rod 9, described large chamber 18 and be opened in the 3rd oil pipe 33 be communicated with described 4th hydraulic fluid port 14 in described core pipe piston rod 16, described first hydraulic fluid port 21 can be communicated with described 3rd oil pipe 33 by described large chamber 18.
Further, described first core pipe oil duct A comprises: be opened in described telescopic oil cylinder piston rod 9 and the first ring tee section oil duct 34 interconnected in described core tube cylinder 17, described loculus 15 and be opened in the second circular crosssection oil duct 35 be communicated with described 3rd hydraulic fluid port 13 in described core pipe piston rod 16, described first ring tee section oil duct 34 can be communicated with described second circular crosssection oil duct 35 by described loculus 15.
Further, described second core pipe oil duct B comprises: be opened in described first hydraulic fluid port 21 in described telescopic oil cylinder piston rod 9, described large chamber 18 and be opened in the 3rd circular crosssection oil duct 36 be communicated with described 4th hydraulic fluid port 14 in described core pipe piston rod 16, described first hydraulic fluid port 21 can be communicated with described 3rd circular crosssection oil duct 36 by described large chamber 18.
Further, described telescopic oil cylinder cylindrical shell 10 is divided into telescopic oil cylinder loculus 11 and the large chamber 12 of telescopic oil cylinder by described telescopic oil cylinder piston rod 9;
The exterior edge face of described telescopic oil cylinder piston rod 9 is provided with telescopic oil cylinder loculus filler opening 22 and telescopic oil cylinder large chamber filler opening 19, the shank portion of described telescopic oil cylinder piston rod 9 offers the first oil duct be communicated with described telescopic oil cylinder loculus 11, and the piston portion of described telescopic oil cylinder piston rod 9 offers the second oil duct that chamber 12 large with described telescopic oil cylinder is communicated with;
Described telescopic oil cylinder loculus filler opening 22 is described telescopic oil cylinder loculus 11 fuel feeding by described first oil duct, and described telescopic oil cylinder large chamber filler opening 19 is described telescopic oil cylinder large chamber 12 fuel feeding by described second oil duct.
Further, described telescopic oil cylinder piston rod 9 and telescopic oil cylinder cylindrical shell 10 are provided with sliding sealing device at sliding contact position.
Further, described core pipe piston rod 16 and described core tube cylinder 17 are provided with sliding sealing device at sliding contact position.
For achieving the above object, the utility model second aspect provides a kind of single-cylinder bolt hydraulic system, comprise: comprise above-mentioned core pipe telescopic oil cylinder, the fluid of drawing from the 3rd hydraulic fluid port 13 and the 4th hydraulic fluid port 14 can carry out commutation control to cylinder pin oil cylinder 15a and arm pin oil cylinder 16a.
For achieving the above object, the utility model third aspect provides a kind of hoist, comprising: above-mentioned single-cylinder bolt hydraulic system.
Based on technique scheme, the core pipe telescopic oil cylinder of the utility model embodiment, adopt the fuel system of bi-core pipe, telescopic oil cylinder can be made to provide two-way pressure oil to control respectively for cylinder pin oil cylinder and arm pin oil cylinder, and telescopic oil cylinder rotate and flexible time all do not affect fuel feeding, do not need to coordinate Returnning spring just can realize controlling to switch yet, this core pipe fuel system not only ensure that the compactedness of telescopic oil cylinder structure, and make the design of semi-girder assembly and telescopic oil cylinder assembly more flexible, thus design difficulty and cost can be reduced, and then improve the working life of hoist and perform the reliability of telescopic boom action.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is single cylinder bolt-type crane hoisting arm expansion schematic diagram in prior art;
Fig. 2 is the structural representation of single-core tube telescopic oil cylinder in prior art;
Fig. 3 is the hydraulic system principle figure adopting single-core tube telescopic oil cylinder fuel feeding in prior art;
Fig. 4 is the structural representation of an embodiment of the utility model single cylinder bolt system;
Fig. 5 is that the arm lock of the utility model single-cylinder bolt hydraulic system determines view;
Fig. 6 is the arm pin released state schematic diagram of the utility model single-cylinder bolt hydraulic system;
Fig. 7 is the structural representation of an embodiment of the utility model bi-core pipe telescopic oil cylinder;
Fig. 8 is the fuel feeding oil duct schematic diagram of an embodiment of the utility model bi-core pipe telescopic oil cylinder;
Fig. 9 is the structural representation of another embodiment of the utility model bi-core pipe telescopic oil cylinder fuel feeding.
Description of reference numerals
1a-arm pin; 2a-arm pin-and-hole; 3a-cylinder barrel; 4a-cylinder head; 5a-cylinder pin; 7a-telescopic oil cylinder piston rod; 8a-telescopic oil cylinder cylinder barrel; 9a-loculus; The large chamber of 10a-; 11a-core pipe oil outlet; 12a-telescopic oil cylinder large chamber filler opening; 13a-core pipe filler opening; 14a-telescopic oil cylinder loculus filler opening; 15a-cylinder pin oil cylinder; 16a-arm pin oil cylinder;
1-arm pin; 2-arm pin-and-hole; 3-basic arm; 4-No. bis-arms; 5-No. tri-arms; 6-No. tetra-arms; 7-arm pin bolt; 8-spring; 9-telescopic oil cylinder piston rod; 10-telescopic oil cylinder cylindrical shell; 11-telescopic oil cylinder loculus; The large chamber of 12-telescopic oil cylinder; 13-the 3rd hydraulic fluid port; 14-the 4th hydraulic fluid port; 15-loculus; 16-core pipe piston rod; 17-core tube cylinder; The large chamber of 18-; 19-telescopic oil cylinder large chamber filler opening; 20-second hydraulic fluid port; 21-first hydraulic fluid port; 22-telescopic oil cylinder loculus filler opening; 31-first oil pipe; 32-second oil pipe; 33-the 3rd oil pipe; 34-first ring tee section oil duct; 35-second circular crosssection oil duct; 36-the 3rd circular crosssection oil duct; A-first core pipe oil duct; B-second core pipe oil duct.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
First should be noted that: terms such as " first ", " second " that occur in the utility model is only for convenience of description, to distinguish the different constituent elementss with same names, or represents different intervals, do not represent successively or primary-slave relation.
The single-cylinder bolt extending means that current hoist adopts is primarily of semi-girder and oil cylinder composition, for the hoist of four joint semi-girders, as shown in Figure 4, the arm tail of basic arm 3 arranges arm pin-and-hole 2, mounting arm pin 1 on the arm tail of No. two arms 4 accordingly, for realizing locking and the unblock of basic arm 3 and No. two arms 4; By that analogy, the arm tail of No. three arms 5 and No. four arms 6 is also provided with arm pin 1.The cylinder barrel end of oil cylinder arranges cylinder head, cylinder head is installed cylinder pin, for realizing locking and the unblock of semi-girder and cylinder barrel.Such as, when No. four arms 6 will perform expanding-contracting action, arm pin 1 is extracted from arm pin-and-hole 2, and meanwhile, cylinder pin inserts cylinder pin-and-hole, and the cylinder barrel of oil cylinder drives No. four arms 6 to move to the position of needs; When No. four arms 6 execute action need fixing time, arm pin 1 insertion arm pin-and-hole 2, cylinder pin is extracted from cylinder pin-and-hole, then achieve the locking of No. four arms 6.Like this by the cooperation of arm pin 1 and cylinder pin, reliably realize the expanding-contracting action of each joint semi-girder.
For the ease of the motion of control arm pin 1, as shown in Figure 4, generally arm pin bolt 7 is set below arm pin 1, as the extension rod of arm pin 1.See Fig. 3, the cylinder barrel of oil cylinder is provided with two arm pin oil cylinder 16a, and the piston rod of arm pin oil cylinder 16a is connected with oat tail groove structure, and the bolt head of arm pin bolt 7 is fastened in dovetail groove.As shown in Figure 6, when needs pull arm pin 1, the high pressure oil provided by arm pin oil cylinder 16a overcomes the active force of spring 8, drives oat tail groove structure lower arm pin bolt 7, thus band swing arm pin 1 is extracted from arm pin-and-hole 2.As shown in Figure 5, when needs are by arm pin 1 insertion arm pin-and-hole 2, arm pin oil cylinder 16a switches to low pressure oil return, under the active force of spring 8, is discharged by arm pin 1, is inserted in arm pin-and-hole 2.
In order to realize the switching of high-pressure oil feed and low pressure oil return, the inside of telescopic oil cylinder needs to arrange core pipe, and core pipe is arranged in the middle of telescopic oil cylinder, comprises core tube cylinder and the body of rod, and oil sources entrance, at cylinder bar afterbody, exports at cylinder barrel head.The mode of what telescopic oil cylinder of the prior art adopted is single-core tube, when thus driving the execution oil cylinder of next stage, need to carry out pressure switching to oil duct, and coordinate spring reset to realize the double-direction control performing oil cylinder, cause design difficulty to increase like this, and reliability reduce.In order to can the problems of the prior art be solved, inventor notices, if telescopic oil cylinder can simultaneously for performing two cavitys fuel feeding respectively of oil cylinder, then can save employing spring reset, the design difficulty of oil cylinder and semi-girder can not only be reduced like this, and reliability and the life-span of single-cylinder bolt mechanism can also be improved.
According to this mentality of designing, embodiment of the present utility model provides a kind of core pipe telescopic oil cylinder, the structural representation of bi-core pipe telescopic oil cylinder fuel feeding as shown in Figure 7, and the oil duct schematic diagram of the bi-core pipe telescopic oil cylinder fuel feeding shown in Fig. 8, comprise: telescopic oil cylinder cylindrical shell 10, core tube cylinder 17, telescopic oil cylinder piston rod 9 and core pipe piston rod 16, telescopic oil cylinder piston rod 9 can slide in telescopic oil cylinder cylindrical shell 10, and core pipe piston rod 16 can slide in core tube cylinder 17; Telescopic oil cylinder piston rod 9 is hollow structure, and core tube cylinder 17 is coaxially arranged in the hollow structure of telescopic oil cylinder piston rod 9.
For the structure of this kind of telescopic oil cylinder, provide two kinds of means of fixation that can realize.In one embodiment, as shown in Figure 7, core tube cylinder 17 and core pipe piston rod 16 are fixed with telescopic oil cylinder piston rod 9 and telescopic oil cylinder cylindrical shell 10 respectively, and telescopic oil cylinder cylindrical shell 10 can drive core pipe piston rod 16 to be synchronized with the movement.In another kind of embodiment, core tube cylinder 17 and core pipe piston rod 16 are fixed with telescopic oil cylinder cylindrical shell 10 and telescopic oil cylinder piston rod 9 respectively, and telescopic oil cylinder cylindrical shell 10 drives core tube cylinder 17 to be synchronized with the movement.
Simultaneously, the rod end of telescopic oil cylinder piston rod 9 is provided with the first hydraulic fluid port 21 and the second hydraulic fluid port 20, the bottom of telescopic oil cylinder cylindrical shell 10 is provided with the 3rd hydraulic fluid port 13 and the 4th hydraulic fluid port 14, between the first hydraulic fluid port 21 and the 3rd hydraulic fluid port 13, be provided with the first core pipe oil duct A of the loculus 15 by way of core tube cylinder 17, between the second hydraulic fluid port 20 and the 4th hydraulic fluid port 14, be provided with the second core pipe oil duct B by way of the large chamber 18 of core tube cylinder 17.Wherein, the rod end of telescopic oil cylinder piston rod 9 refers to that shank portion is positioned at the end face outside telescopic oil cylinder; The bottom of telescopic oil cylinder cylindrical shell 10 refers to the end face of the mounting hole not arranging telescopic oil cylinder piston rod 9.
The utility model changes telescopic oil cylinder of the prior art into bi-core pipe fuel system by single-core tube fuel system, slided in core tube cylinder 17 by core pipe piston rod 16, core tube cylinder 17 is divided into loculus 15 and large chamber 18, wherein loculus 15 and large chamber 18 are for the formation of two independently oil ducts, such telescopic oil cylinder just can provide two-way pressure oil to control for cylinder pin oil cylinder and arm pin oil cylinder, comprise high-pressure oil feed and low pressure oil return, this improvement makes not need to coordinate Returnning spring and oil duct pressure to switch in single-cylinder bolt control system, by means of only hydraulic control just can be simple and reliable realize the action of semi-girder.
Because semi-girder cross section is less, the design space of Returnning spring is restricted, and this makes telescopic oil cylinder design difficulty of the prior art comparatively large, may cause the reposition force deficiency of spring or shorten fatigue life, and then reliability is reduced; And in the utility model, do not need the design headspace for spring, make the design of semi-girder assembly and telescopic oil cylinder assembly more flexible, thus design difficulty and cost can be reduced, and then improve working life and the reliability of hoist.
In addition, bi-core pipe structure in the utility model is all arranged on the inside of telescopic oil cylinder, can not have any impact to the external structure of telescopic oil cylinder, thus the structural entity of this core pipe fuel feeding is comparatively compact, the global design requirement in single-cylinder bolt control system can be met, and also can not affect the fuel feeding of two-way core pipe when telescopic oil cylinder performs rotation or expanding-contracting action.
In this embodiment, the first core pipe oil duct A and the second core pipe oil duct B can have different implementations, and provide concrete implementation structure below in conjunction with accompanying drawing, designer can carry out combination in any according to the situation in telescopic oil cylinder space and cylinder efficient parameter.
In a first embodiment, as shown in Figure 7, first core pipe oil duct A comprises: be opened in telescopic oil cylinder piston rod 9 and the first oil pipe 31 interconnected in core tube cylinder 17, loculus 15 and be opened in the second oil pipe 32 be communicated with the 3rd hydraulic fluid port 13 in core pipe piston rod 16, the first oil pipe 31 can be communicated with the second oil pipe 32 by loculus 15.
Particularly, first oil pipe 31 comprises: be opened in the first hydraulic fluid port 21 on telescopic oil cylinder piston rod 9, the oil pipe being opened in the outer wall of core tube cylinder 17 and the oil pipe be opened in the piston portion of telescopic oil cylinder piston rod 9, this three part is communicated with formation first oil pipe 31 successively.
In a second embodiment, as shown in Figure 7, second core pipe oil duct B comprises: the second core pipe oil duct B comprises: be opened in the first hydraulic fluid port 21 in telescopic oil cylinder piston rod 9, large chamber 18 and be opened in the 3rd oil pipe 33 be communicated with the 4th hydraulic fluid port 14 in core pipe piston rod 16, the first hydraulic fluid port 21 can be communicated with the 3rd oil pipe 33 by large chamber 18.
In the third embodiment, as shown in Figure 9, first core pipe oil duct A comprises: be opened in telescopic oil cylinder piston rod 9 and the first ring tee section oil duct 34 interconnected in core tube cylinder 17, loculus 15 and be opened in the second circular crosssection oil duct 35 be communicated with the 3rd hydraulic fluid port 13 in core pipe piston rod 16, first ring tee section oil duct 34 can be communicated with the second circular crosssection oil duct 35 by loculus 15.
Particularly, first ring tee section oil duct 34 comprises: the circular crosssection oil duct being opened in circular crosssection first hydraulic fluid port 21 on telescopic oil cylinder piston rod 9, being opened in the circular crosssection oil duct of the outer wall of core tube cylinder 17 and being opened in the piston portion of telescopic oil cylinder piston rod 9, and this three part is communicated with formation first ring tee section oil duct 34 successively.
In the fourth embodiment, second core pipe oil duct B comprises: be opened in the first hydraulic fluid port 21 in telescopic oil cylinder piston rod 9, large chamber 18 and be opened in the 3rd circular crosssection oil duct 36 be communicated with the 4th hydraulic fluid port 14 in core pipe piston rod 16, the first hydraulic fluid port 21 can be communicated with the 3rd circular crosssection oil duct 36 by large chamber 18.
In a preferred embodiment of the present utility model, as shown in Figure 7, the first core pipe oil duct A and the second core pipe oil duct B all adopts oil pipe fuel feeding, and this oil duct processing is comparatively simple, be suitable for the occasion that traffic demand is less, will be described in detail its concrete structure below.
Core tube cylinder 17 is fixed in the hollow structure of telescopic oil cylinder piston rod 9, offers the first hydraulic fluid port 21 and the first hydraulic fluid port 20 at the rod end of telescopic oil cylinder piston rod 9, and the bottom of telescopic oil cylinder cylindrical shell 10 offers the 3rd hydraulic fluid port 13 and the 4th hydraulic fluid port 14.First hydraulic fluid port 21 place arranges tubulose oil duct, this oil duct is in the fixed connection place bending of telescopic oil cylinder piston rod 9 with core tube cylinder 17, and pass through along the outer wall of core tube cylinder 17, directly lead in the piston portion of telescopic oil cylinder piston rod 9, bending again herein, can be communicated with the loculus 15 of core tube cylinder 17.Be positioned on the end face of loculus 15 of core tube cylinder 17 at core pipe piston rod 16 simultaneously, also tubulose oil duct is offered, and extend in the body of rod of core pipe piston rod 16 after bending, until be communicated with the 3rd hydraulic fluid port 13, between the first hydraulic fluid port 21 and the 3rd hydraulic fluid port 13, so far just define the first core pipe oil duct A shown in Fig. 8.
Simultaneously, second hydraulic fluid port 20 place arranges tubulose oil duct, directly just can be communicated with the large chamber 18 of core tube cylinder 17, and also offer in the body of rod of core pipe piston rod 16 and the first core pipe oil duct A phase independently tubulose oil duct, extend to always and be communicated with the 4th hydraulic fluid port 14, between the first hydraulic fluid port 20 and the 4th hydraulic fluid port 14, so far just define the second core pipe oil duct B shown in Fig. 8.
When semi-girder will perform expanding-contracting action, the first core pipe oil duct A and the second core pipe oil duct B is respectively as in-line and oil circuit, and control cylinder lock is fixed, and arm pin 1 unlocks, and just synchronously can drive arm-stretching exercise by telescopic oil cylinder cylindrical shell 10 in this state; If semi-girder executes expanding-contracting action when needing fixing, can be switched by selector valve to in-line and oil circuit, control control cylinder pin and unlock, arm pin 1 locks, and in this state, adjacent semi-girder just can interfix mutually.
Because in reality, telescopic oil cylinder piston rod 9 is in stationary state, thus core pipe piston rod 16 along with telescopic oil cylinder cylindrical shell 10 move time, if perform stretch, loculus 15 length of core tube cylinder 17 can reduce gradually, and the length in large chamber 18 can increase gradually; Otherwise if perform the action of contracting arm, loculus 15 length of core tube cylinder 17 can increase gradually, and the length in large chamber 18 can reduce gradually.But, when no matter being in which kind of relative movement state, comprise straight line motion and rotation, all connected state is between first hydraulic fluid port 21 and the 3rd hydraulic fluid port 13, also connected state is between second hydraulic fluid port 20 and the 4th hydraulic fluid port 14, flowing through of fluid can not be affected, now core pipe can be interpreted as and a set ofly be hidden in inside retractable cylinder and the length pipeline that can stretch.In order to effective exercise stroke when telescopic oil cylinder cylindrical shell 10 controls telescopic boom can be ensured, need when designing to ensure that movement travel that core tube cylinder 17 allows is more than or equal to the actual motion stroke of telescopic oil cylinder cylindrical shell 10 by physical dimension.
In another preferred embodiment of the present utility model, as shown in Figure 9, first core pipe oil duct A adopts circular crosssection oil duct fuel feeding, and the second core pipe oil duct B adopts oil pipe fuel feeding, the mode of circular crosssection oil duct fuel feeding is adopted to be applicable to the larger occasion of traffic demand, be equivalent to by two nested rear cracks of oil pipe as oil duct, on two end faces of telescopic oil cylinder, the first hydraulic fluid port 21 and the 3rd hydraulic fluid port 13 are all in ring.
Certainly, the structural type of the first core pipe oil duct A and the second core pipe oil duct B is also not limited to above embodiment, designer also can take the structure of other form, as long as can between corresponding hydraulic fluid port, being formed by the loculus 15 of core tube cylinder 17 and large chamber 18 can by the structure of fluid conducting.
Because the radial dimension of semi-girder is limited, in order to make structure compacter thus save space, in another embodiment of the present utility model, two cavity fuel feeding are respectively by two oil ducts being opened in telescopic oil cylinder piston rod 9 inside, specific as follows: telescopic oil cylinder cylindrical shell 10 is divided into telescopic oil cylinder loculus 11 and the large chamber 12 of telescopic oil cylinder by telescopic oil cylinder piston rod 9; The exterior edge face of telescopic oil cylinder piston rod 9 is provided with telescopic oil cylinder loculus filler opening 22 and telescopic oil cylinder large chamber filler opening 19, the shank portion of telescopic oil cylinder piston rod 9 offers the first oil duct be communicated with telescopic oil cylinder loculus 11, and the piston portion of telescopic oil cylinder piston rod 9 offers the second oil duct that chamber 12 large with telescopic oil cylinder is communicated with; Telescopic oil cylinder loculus filler opening 22 is telescopic oil cylinder loculus 11 fuel feeding by the first oil duct, and telescopic oil cylinder large chamber filler opening 19 is telescopic oil cylinder large chamber 12 fuel feeding by the second oil duct.
Preferably, in order to make to reach good sealing effect between telescopic oil cylinder cylindrical shell 10 and telescopic oil cylinder piston rod 9, prevent fluid outwardly seepage, or the large chamber 12 of telescopic oil cylinder and telescopic oil cylinder loculus 11 can not be isolated well, in one embodiment, telescopic oil cylinder piston rod 9 and telescopic oil cylinder cylindrical shell 10 are provided with sliding sealing device at sliding contact position.
Preferably, in order to make to reach better effect between core tube cylinder 17 and core pipe piston rod 16, prevent fluid to seepage in the large chamber 12 of telescopic oil cylinder, or loculus 15 and the large chamber 18 of core tube cylinder 17 can not isolate well, in another embodiment, core pipe piston rod 16 and core tube cylinder 17 are provided with sliding sealing device at sliding contact position.
In engineering practice, engineering staff can other conventional sealing approach in seal ring or related domain, owing to being slipper seal, needs the material taking friction factor less to make seal ring, the resistance produced during to reduce telescopic oil cylinder motion.
In addition, the utility model additionally provides a kind of single-cylinder bolt hydraulic system, comprise the core pipe telescopic oil cylinder of above-described embodiment, the fluid of drawing from the 3rd hydraulic fluid port 13 and the 4th hydraulic fluid port 14 can carry out commutation control to cylinder pin oil cylinder 15a and arm pin oil cylinder 16a, and the mounting point of cylinder pin oil cylinder 15a and arm pin oil cylinder 16a is see Fig. 3.Because the inside retractable cylinder adopted in hydraulic system has two independently oil supply galleries, so just two-way pressure oil can be provided to control for cylinder pin oil cylinder and arm pin oil cylinder, this improvement makes not need in single-cylinder bolt control system to coordinate Returnning spring and oil duct pressure to switch, by means of only hydraulic control just can be simple and reliable realize the action of semi-girder.This kind of single-cylinder bolt hydraulic system can improve the reliability that arm performs expanding-contracting action, and reduce the probability of the action control inefficacy caused due to spring reset fault in prior art, the working life of simultaneity factor also increases greatly.And after adopting bi-core pipe telescopic oil cylinder, the design difficulty of telescopic oil cylinder and semi-girder can be reduced, thus reach cost-saving object.
Finally, the utility model additionally provides a kind of hoist, have employed the single-cylinder bolt hydraulic system of above-described embodiment, because single-cylinder bolt hydraulic system is the core that hoist performs telescopic boom control, thus, after the functional reliability of single-cylinder bolt hydraulic system and life-span are guaranteed, the Security of hoist can be ensured to a great extent.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And do not depart from the spirit of technical solutions of the utility model, all should be encompassed in the utility model request protection technological scheme scope in the middle of.
Claims (10)
1. a core pipe telescopic oil cylinder, it is characterized in that, comprise: telescopic oil cylinder cylindrical shell (10), core tube cylinder (17), telescopic oil cylinder piston rod (9) and core pipe piston rod (16), described telescopic oil cylinder piston rod (9) can be slided in described telescopic oil cylinder cylindrical shell (10), and described core pipe piston rod (16) can be slided in described core tube cylinder (17); Described telescopic oil cylinder piston rod (9) is hollow structure, and described core tube cylinder (17) is coaxially arranged in the hollow structure of described telescopic oil cylinder piston rod (9);
Described core tube cylinder (17) and core pipe piston rod (16) are fixed with described telescopic oil cylinder piston rod (9) and described telescopic oil cylinder cylindrical shell (10) respectively, or described core tube cylinder (17) and core pipe piston rod (16) respectively with described telescopic oil cylinder cylindrical shell (10) and described telescopic oil cylinder piston rod (9) fixing;
The rod end of described telescopic oil cylinder piston rod (9) is provided with the first hydraulic fluid port (21) and the second hydraulic fluid port (20), the bottom of described telescopic oil cylinder cylindrical shell (10) is provided with the 3rd hydraulic fluid port (13) and the 4th hydraulic fluid port (14), the first core pipe oil duct (A) of the loculus (15) by way of described core tube cylinder (17) is provided with between described first hydraulic fluid port (21) and described 3rd hydraulic fluid port (13), the second core pipe oil duct (B) by way of the large chamber (18) of described core tube cylinder (17) is provided with between described second hydraulic fluid port (20) and described 4th hydraulic fluid port (14).
2. core pipe telescopic oil cylinder according to claim 1, it is characterized in that, described first core pipe oil duct (A) comprising: be opened in described telescopic oil cylinder piston rod (9) and the first oil pipe (31) interconnected in described core tube cylinder (17), described loculus (15) and be opened in the second oil pipe (32) be communicated with described 3rd hydraulic fluid port (13) in described core pipe piston rod (16), described first oil pipe (31) can be communicated with described second oil pipe (32) by described loculus (15).
3. core pipe telescopic oil cylinder according to claim 1, it is characterized in that, described second core pipe oil duct (B) comprising: be opened in described first hydraulic fluid port (21) in described telescopic oil cylinder piston rod (9), described large chamber (18) and be opened in the 3rd oil pipe (33) be communicated with described 4th hydraulic fluid port (14) in described core pipe piston rod (16), described first hydraulic fluid port (21) can be communicated with described 3rd oil pipe (33) by described large chamber (18).
4. core pipe telescopic oil cylinder according to claim 1, it is characterized in that, described first core pipe oil duct (A) comprising: be opened in the first ring tee section oil duct (34) interconnected in described telescopic oil cylinder piston rod (9) and described core tube cylinder (17), described loculus (15) be opened in described core pipe piston rod (16) the second circular crosssection oil duct (35) be communicated with described 3rd hydraulic fluid port (13), described first ring tee section oil duct (34) can be communicated with described second circular crosssection oil duct (35) by described loculus (15).
5. core pipe telescopic oil cylinder according to claim 1, it is characterized in that, described second core pipe oil duct (B) comprising: be opened in described first hydraulic fluid port (21) in described telescopic oil cylinder piston rod (9), described large chamber (18) and be opened in the 3rd circular crosssection oil duct (36) be communicated with described 4th hydraulic fluid port (14) in described core pipe piston rod (16), described first hydraulic fluid port (21) can be communicated with described 3rd circular crosssection oil duct (36) by described large chamber (18).
6. according to the arbitrary described core pipe telescopic oil cylinder of Claims 1 to 5, it is characterized in that, described telescopic oil cylinder cylindrical shell (10) is divided into telescopic oil cylinder loculus (11) and the large chamber of telescopic oil cylinder (12) by described telescopic oil cylinder piston rod (9);
The exterior edge face of described telescopic oil cylinder piston rod (9) is provided with telescopic oil cylinder loculus filler opening (22) and telescopic oil cylinder large chamber filler opening (19), the shank portion of described telescopic oil cylinder piston rod (9) offers the first oil duct be communicated with described telescopic oil cylinder loculus (11), and the piston portion of described telescopic oil cylinder piston rod (9) offers the second oil duct be communicated with the large chamber of described telescopic oil cylinder (12);
Described telescopic oil cylinder loculus filler opening (22) is described telescopic oil cylinder loculus (11) fuel feeding by described first oil duct, and described telescopic oil cylinder large chamber filler opening (19) is the large chamber of described telescopic oil cylinder (12) fuel feeding by described second oil duct.
7., according to the arbitrary described core pipe telescopic oil cylinder of Claims 1 to 5, it is characterized in that, described telescopic oil cylinder piston rod (9) and telescopic oil cylinder cylindrical shell (10) are provided with sliding sealing device at sliding contact position.
8., according to the arbitrary described core pipe telescopic oil cylinder of Claims 1 to 5, it is characterized in that, described core pipe piston rod (16) and described core tube cylinder (17) are provided with sliding sealing device at sliding contact position.
9. a single-cylinder bolt hydraulic system, it is characterized in that, comprise the arbitrary described core pipe telescopic oil cylinder of claim 1 ~ 8, the fluid of drawing from the 3rd hydraulic fluid port (13) and the 4th hydraulic fluid port (14) can carry out commutation control to cylinder pin oil cylinder (15a) and arm pin oil cylinder (16a).
10. a hoist, is characterized in that, comprises single-cylinder bolt hydraulic system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520024653.3U CN204493344U (en) | 2015-01-14 | 2015-01-14 | Core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520024653.3U CN204493344U (en) | 2015-01-14 | 2015-01-14 | Core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204493344U true CN204493344U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520024653.3U Withdrawn - After Issue CN204493344U (en) | 2015-01-14 | 2015-01-14 | Core pipe telescopic oil cylinder, single-cylinder bolt hydraulic system and hoist |
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| Country | Link |
|---|---|
| CN (1) | CN204493344U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443497A (en) * | 2015-01-14 | 2016-03-30 | 徐州重型机械有限公司 | Core tube telescopic cylinder, single cylinder bolt hydraulic system and crane |
-
2015
- 2015-01-14 CN CN201520024653.3U patent/CN204493344U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443497A (en) * | 2015-01-14 | 2016-03-30 | 徐州重型机械有限公司 | Core tube telescopic cylinder, single cylinder bolt hydraulic system and crane |
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