CN207715463U - A kind of sequential telescopic oil cylinder and crane - Google Patents
A kind of sequential telescopic oil cylinder and crane Download PDFInfo
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- CN207715463U CN207715463U CN201721481846.7U CN201721481846U CN207715463U CN 207715463 U CN207715463 U CN 207715463U CN 201721481846 U CN201721481846 U CN 201721481846U CN 207715463 U CN207715463 U CN 207715463U
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- 238000003466 welding Methods 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 description 212
- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of sequential telescopic oil cylinder, and when stretching out successively, fluid enters from welding heart pipe one end, flows into the rodless cavity of the first oil cylinder and the second oil cylinder.The rod chamber of first oil cylinder is through oil-through hole oil return.Stroke valve is located at upper station, and the rod chamber of the second oil cylinder is then ended by stroke valve, and the first oil cylinder is fully extended, and the rod chamber of the second oil cylinder could oil return；Twin-tub sequence is stretched out.When twin-tub is retracted successively, fluid enters from extraneous in the cavity between welding heart pipe and First piston bar, and the rod chamber in the Oil Guide channel and the second oil cylinder of guide sleeve is flowed by oil-through hole, and stroke valve is in upper station, pressure oil and the rod chamber that cannot be introduced into the first oil cylinder, the first oil cylinder can not retract.When only stroke valve is returned to lower station, the pressure oil in Oil Guide channel could enter the rod chamber of the first oil cylinder by station under stroke valve in guide sleeve, and twin-tub sequence is retracted.The utility model also provides a kind of crane including sequential telescopic oil cylinder.
Description
Technical field
The utility model is related to technical field of hydraulic pressure, further relate to a kind of sequential telescopic oil cylinder.In addition, this practicality is new
Type also provides a kind of crane including said sequence telescopic oil cylinder.
Background technology
The joint number of straight-arm type lorry-mounted crane telescopic arm mainly has two sections, three sections, four sections, the Telescopic point of telescopic jib
It is not completed by double-cylinder structure, twin-tub list rope structure, the row's structure driving of twin-tub duplex type, wherein three sections, four section telescopic jibs is double
Cylinder structure is required to realize stringent twin-tub sequential telescopic function, and cylinder two can be stretched out after cylinder one is fully extended, waits for cylinder two
Can retract cylinder one after being fully retracted, and otherwise will appear the phenomenon for mutually altering oil, while which shows as the stretching of cylinder one
Cylinder two is retracted, and Fig. 1 is that twin-tub alters oily schematic diagram, and cylinder 1,2 02 rodless cavity of cylinder are interconnected, rod chamber is interconnected, and work as cylinder
When 2 02 cylinder barrel bears load force, the rodless cavity V3 of cylinder 2 02 generates prodigious pressure because of compression, and V3 cavity pressure oil can quilt
It is injected into the rodless cavity V1 of cylinder 1, the become larger cylinder barrel of i.e. cylinder 1 of V1 chambers is caused to move right in direction as shown in the figure；And because
It is rigid connection for the cylinder barrel of cylinder 1 and the piston rod of cylinder 2 02, one 01 cylinder barrel of cylinder drives cylinder two during moving right
02 piston rod moves right together, this process accelerates injection of the V2 cavity pressures oil to V4 chambers, causes cylinder 1 in stretching
Cylinder 2 02 is being retracted simultaneously.
In order to avoid the generation that twin-tub alters oily phenomenon needs stringent control twin-tub sequential telescopic, most technologies is applied at present
Scheme is that the double sequence valves of twin-tub control, and the sequence stretched and contracted is controlled respectively there are two sequence valve in the program.As shown in Fig. 2, being
The double sequence valve control principle drawings of twin-tub；When cylinder 1, cylinder 2 02 stretch out successively, fluid flow direction is A mouthfuls of pressure oils by welding the heart
The rodless cavity that pipe 05, punching pipe 06 enter cylinder 1 by the check valve of the first sequence valve 03 again pushes cylinder 1 protruding,
When pressure rises to the setting pressure of the second sequence valve 04 when cylinder 1 is fully extended, pressure oil can just open the second sequence
Valve 04 enters the rodless cavity of cylinder 2 02, pushes cylinder 2 02 protruding.Fluid flow direction is B when cylinder 2 02, cylinder 1 are retracted successively
Mouthful pressure oil is directly entered the rod chamber of two cylinders, check valve by the second sequence valve 04 of the rodless cavity oil return of cylinder 2 02, punching
Pipe 06, the first oil return of 05 to A mouthfuls of welding heart pipe, pressure rises to the setting pressure of the first sequence valve 03 when cylinder 2 02 is fully retracted
When power, the rodless cavity oil return of cylinder 1 can just open the first sequence valve 03, punching pipe 06,05 oil return of welding heart pipe.
The program can realize sequential telescopic function under most operating modes, but when load pressure is more than setting for sequence valve
It just cannot achieve sequential telescopic function when constant-pressure, this also requires the setting pressure of sequence valve quite suitable, sets pressure
Small cannot achieve sequential telescopic function, setting pressure is big and can increase operating pressure.
Utility model content
The utility model provides a kind of sequential telescopic oil cylinder, can realize the function of twin-tub sequential telescopic, oil cylinder internal junction
Structure is simple, reduces processing and manufacturing difficulty, and concrete scheme is as follows：
A kind of sequential telescopic oil cylinder, including：
First oil cylinder, including First piston bar and the first cylinder sleeve, setting welding heart pipe in the inner cavity of the First piston bar,
The both ends connection of the welding heart pipe is simultaneously sealed with the First piston bar, and oil was opened up on the barrel of the First piston bar
Hole, the oil-through hole is by annular space and first oil cylinder between the welding heart pipe and the First piston bar inner wall
Rod chamber is connected to, and one end of annular space is in communication with the outside；Setting with the piston rod for sliding in first cylinder sleeve
The guide sleeve of cooperation is sealed, opens up Oil Guide channel on the guide sleeve, the Oil Guide channel can be connected to the oil-through hole；
Second oil cylinder, including second piston bar and the second cylinder sleeve, the second piston bar is fixed with first cylinder sleeve to be connected
It connects；The rodless cavity of the rodless cavity of second oil cylinder and first oil cylinder is interconnected, the rod chamber of second oil cylinder with
The Oil Guide channel connection；
Stroke valve, both ends hydraulic fluid port are connected to the rod chamber in the Oil Guide channel and first oil cylinder；The stroke
Valve includes upper station and lower station, the upper station from the Oil Guide channel to the rod chamber unidirectional cutoff of first oil cylinder,
The lower station makes the rod chamber of the Oil Guide channel and first oil cylinder be interconnected.
Optionally, the stroke valve is fixed on first cylinder sleeve, and collision block, the collision block are arranged on second cylinder sleeve
It can be contacted with the stroke valve, to switch the station of the stroke valve；When first oil cylinder and second oil cylinder are completed
When retraction, the collision block and the stroke valve exactly in contact with.
Optionally, the middle section of the guide sleeve is cricoid Oil Guide chamber, and the size of the Oil Guide chamber is more than described lead
Oily channel.
Optionally, the oil-through hole is along the circumferentially disposed two rows of the First piston bar, the spacing of two rows of oil-through holes
Less than the width of the Oil Guide chamber.
Optionally, spacing L2 apart from the guide sleeve front end of the width L1 of the Oil Guide chamber, Oil Guide chamber front end, two
Arrange the pass between spacing L4 of the oil-through hole apart from the First piston bar front end described in the spacing L3 of the oil-through hole, one row of front end
System is：
L2<L3<L1；L4>L2；L3+L4<L1+L2.
The utility model also provides a kind of crane, including sequential telescopic oil cylinder described in any one of the above embodiments.
The utility model provides the structures such as a kind of sequential telescopic oil cylinder, including the first oil cylinder, the second oil cylinder and stroke valve,
When first oil cylinder, the second oil cylinder stretch out successively, fluid enters from extraneous connection one end of welding heart pipe, and pressure oil is by the welding heart
Pipe while the rodless cavity for flowing into the first oil cylinder and the second oil cylinder.The pressure oil of first cylinder rod chamber enters the welding heart through oil-through hole
In cavity between pipe and First piston bar, and flow out rod chamber.Stroke valve is located at upper station, the rod chamber of the second oil cylinder then by
Stroke valve end and can not oil return, i.e. the second oil cylinder can not stretch out, and only the first oil cylinder is fully extended, i.e. oil-through hole is to positive Oil Guide
When channel, the rod chamber of the second oil cylinder could flow out to the external world by Oil Guide channel, oil-through hole；The first oil cylinder and second are reached
The purpose that oil cylinder sequence is stretched out.
When first oil cylinder and the second oil cylinder are retracted successively, fluid enters from the external world between welding heart pipe and First piston bar
In cavity, the rod chamber in the Oil Guide channel and the second oil cylinder of guide sleeve is flowed by oil-through hole, twin-tub all in stretching completely at this time
It does well, stroke valve is in upper station cut-off state, pressure oil and the rod chamber that cannot be introduced into the first oil cylinder, so the first oil cylinder
It can not retract.At this time while the rod chamber oil inlet of the second oil cylinder, the rodless cavity of the second oil cylinder by the rodless cavity of the first oil cylinder,
Weld heart pipe oil return；When only stroke valve is returned to lower station, the pressure oil in Oil Guide channel could pass through stroke valve in guide sleeve
Lower station enters the rod chamber of the first oil cylinder, and the first oil cylinder is enable to retract, and pressure oil will be direct after a section of retracting moves
Enter the rod chamber of the first oil cylinder by oil-through hole, the rodless cavity of the first oil cylinder is by welding heart pipe oil return.Only in the second oil
When cylinder is fully retracted, the first oil cylinder could retract, and achieve the purpose that twin-tub sequence is retracted.
The utility model also provides a kind of crane including said sequence telescopic oil cylinder, it can be achieved that identical technology is imitated
Fruit.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is that twin-tub alters oily schematic diagram；
Fig. 2 is the double sequence valve control principle drawings of twin-tub；
Fig. 3 A are structure when the first oil cylinder of sequential telescopic oil cylinder provided by the utility model and the second oil cylinder start stretching
Schematic diagram；
Fig. 3 B are structure principle chart when the first oil cylinder is fully extended；
Fig. 3 C are structure principle chart when the second oil cylinder is fully extended；
Fig. 3 D are the structure principle chart that the first oil cylinder and the second oil cylinder start moment；
Structure principle chart when Fig. 4 A are the first oil cylinder and fully extended the second oil cylinder；
Fig. 4 B are the structure principle chart that the second oil cylinder is fully retracted；
Fig. 4 C are that the first oil cylinder is retracted the structure principle chart of a distance.
Figure includes：
First oil cylinder 1, First piston bar 11, oil-through hole 111, the first cylinder sleeve 12, guide sleeve 13, Oil Guide channel 131, Oil Guide
Chamber 132, welding heart pipe 14, the second oil cylinder 2, second piston bar 21, the second cylinder sleeve 22, collision block 221, stroke valve 3.
Specific implementation mode
The core of the utility model is to provide a kind of sequential telescopic oil cylinder, can realize the function of twin-tub sequential telescopic,
Oil cylinder internal structure is simple, reduces processing and manufacturing difficulty.
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with attached drawing and
Explanation is described in detail to the sequential telescopic oil cylinder of the utility model in specific embodiment.
As shown in Figure 3A, it is the structure principle chart of sequential telescopic oil cylinder provided by the present application；The sequential telescopic oil cylinder includes
The structures such as the first oil cylinder 1, the second oil cylinder 2, stroke valve 3, the first oil cylinder 1 include First piston bar 11 and the first cylinder sleeve 12, first
Piston rod 11 is plugged within the first cylinder sleeve 12, and the two is opposite to be slided, and the piston head of First piston bar 11 divides the first cylinder sleeve 12
It is divided into rod chamber and rodless cavity, left side shown in Fig. 3 A is rod chamber, and right side is rodless cavity.
First piston bar 11 is in hollow setting, and welding heart pipe 14 is arranged in inner cavity, and the both ends of welding heart pipe 14 are connected to, simultaneously
It is sealed with First piston bar 11, welds heart pipe 14 for circulating pressure oil, the left side connection external world of welding heart pipe 14 namely Fig. 3 A
In A mouths, right side is communicated in rodless cavity.Oil-through hole 111 is opened up on the barrel of First piston bar 11, oil-through hole 111 will weld the heart
Annular space between pipe 14 and 11 inner wall of First piston bar is connected to the rod chamber of the first cylinder sleeve 12, the pressure oil in rod chamber
Enter annular space by oil-through hole 111, one end of annular space is in communication with the outside, namely by the B mouths in Fig. 3 A, makes pressure
Oil is flowed out from the left side of First piston bar 11.
Guide sleeve 13 for being slidingly sealed cooperation with piston rod 11 is set in first cylinder sleeve 12, the periphery of guide sleeve 13 with
The inner wall of first cylinder sleeve 12 is fixedly connected, and First piston bar 11 runs through the center of guide sleeve 13, and guide sleeve 13 is with the first cylinder sleeve 12
Left and right synchronous slide.Oil Guide channel 131 is opened up on guide sleeve 13,131 one end of Oil Guide channel is connected to First piston bar 11, the other end
It is in communication with the outside, when guide sleeve 13 is moved right relative to First piston bar 11, Oil Guide channel 131 can when being aligned oil-through hole 111
Oil Guide channel 131 is set to be connected to oil-through hole 111, in perforation setting on side wall, pressure oil can be through Oil Guide channel in Oil Guide channel 131
131 flow out to the external world.
Second oil cylinder 2 includes second piston bar 21 and the second cylinder sleeve 22, and second piston bar 21 is plugged in the second cylinder sleeve 22,
The two is opposite to be slided, and the second cylinder sleeve 22 is divided into rod chamber and rodless cavity by the piston head of second piston bar 21, left shown in Fig. 3 A
Side is rod chamber, and right side is rodless cavity.
Second piston bar 21 is fixedly connected with the first cylinder sleeve 12, and second piston bar 21 and the first cylinder sleeve 12 keep sync bit
It moves.The rodless cavity of the rodless cavity of second oil cylinder 2 and the first oil cylinder 1 by oil circuit be interconnected, the rod chamber of the second oil cylinder 2 with lead
Oily channel 131 is connected to.
For the tool of stroke valve 3 there are two hydraulic fluid port, both ends hydraulic fluid port is connected to the rod chamber in Oil Guide channel 131 and the first oil cylinder 1,
Hydraulic fluid port on the left of stroke valve 3 shown in Fig. 3 A is connected on the oil circuit between the rod chamber and Oil Guide channel 131 of the second oil cylinder 2.Row
Journey valve 3 includes upper station and two working positions of lower station, from Oil Guide channel 131 to the first oil cylinder 1 when stroke valve 3 is in upper station
Rod chamber closing namely Fig. 3 A in from left to right keep closing, what lower station made Oil Guide channel 131 and the first oil cylinder 1 has bar
Chamber is interconnected, and left and right keeps connection, pressure oil or so two-way flowable.
As shown in Figure 3A, structure principle chart when starting to stretch out for the first oil cylinder 1 and the second oil cylinder 2；First oil cylinder 1 and
When two oil cylinders 2 stretch out successively, pressure oil enters the rodless cavity of the first oil cylinder 1 from A mouthfuls by welding heart pipes 14, and flows into the simultaneously
The rodless cavity of two oil cylinders 2.Pressure oil in first oil cylinder, 1 rod chamber enters First piston bar 11 and the welding heart through oil-through hole 111
Annular space between pipe 14, and flowed out from B mouthfuls.Guide sleeve 13 is in left side at this time, and stroke valve 3 is in upper station cut-off shape
State, the rod chamber of the second oil cylinder 2 then by station cut-off on stroke valve 3 and can not oil return, i.e. the second oil cylinder 2 can not stretch out.Such as figure
It is structure principle chart when the first oil cylinder 1 is fully extended shown in 3B；First oil cylinder, 1 fully extended namely oil-through hole 111 is to just
When Oil Guide channel 131, the rod chamber of the second oil cylinder 2 could be by Oil Guide channel 131 on guide sleeve 13, oil-through hole 111, final
By B mouthfuls of oil returns, until the second oil cylinder is fully extended, as shown in Figure 3 C.Second oil cylinder 2 when only the first oil cylinder 1 is fully extended
It could stretch out, achieve the purpose that the first oil cylinder 1 and the second oil cylinder 2 sequentially stretch out.
As shown in Figure 4 A, structure principle chart when being the first oil cylinder 1 and fully extended the second oil cylinder 2；First oil cylinder 1 and
When two oil cylinders 2 are retracted successively, pressure oil is flowed into from B mouthfuls, and Oil Guide channel 131 successively through oil-through hole 111, guide sleeve 13 enters the
The rod chamber of two oil cylinders 2.Twin-tub is all in fully extended state at this time, and stroke valve 3 is in the cut-off of upper station, and pressure oil can not be into
Enter the rod chamber of the first oil cylinder 1, so the first oil cylinder 1 can not retract.At this time second while the rod chamber oil inlet of the second oil cylinder 2
The rodless cavity of oil cylinder 2 by the rodless cavity of the first oil cylinder 1, welding heart pipe 14, pass through A mouthfuls of oil returns.As shown in Figure 4 B, it is the second oil
The structure principle chart that cylinder 2 is fully retracted；When second oil cylinder 2 is fully retracted, stroke valve 3 is in lower station, Oil Guide in guide sleeve 13
The pressure oil in channel 131 could make the first oil cylinder 1 retract by rod chamber of the 3 times stations of stroke valve into the first oil cylinder 1.Such as
It is the structure principle chart of 1 retraction a distance of the first oil cylinder shown in Fig. 4 C；After a section of retracting moves, Oil Guide channel 131 is no longer
When to positive oil-through hole 111, the no longer logical oil in Oil Guide channel 131, pressure oil will directly by B mouthfuls, oil-through hole 111, into first
The rod chamber of oil cylinder 1, the rodless cavity of the first oil cylinder 1 is by welding heart pipe 14, A mouthfuls of oil returns.This procedure declaration is only in the first oil
When cylinder 2 is fully retracted, the first oil cylinder 1 could retract, and achieve the purpose that the first oil cylinder 1 is sequentially retracted with the second oil cylinder 2.
On the basis of said program, stroke valve 3 is fixed on the first cylinder sleeve 12 in the utility model, with the first cylinder sleeve
12 keep moving synchronously, and collision block 221 are arranged on the second cylinder sleeve 22, collision block 221 can be contacted with stroke valve 3, with switching stroke valve 3
Station, when the first oil cylinder 1 and the second oil cylinder 2 complete retraction, collision block 221 and 3 exactly in contact with of stroke valve.When collision block 221 with
Stroke valve 3 is in lower station, the hydraulic fluid port mutual conduction of 3 both sides of stroke valve when stroke valve 3 contacts；Collision block 221 is detached with stroke valve 3
When stroke valve 3 be in upper station, the hydraulic fluid port in 3 left side of stroke valve can not be connected to the right.
When first oil cylinder 1 and the second oil cylinder 2 stretch out successively, moment is started in twin-tub, as shown in Figure 3D, collision block 221 presses
On stroke valve 3, the rod chamber of the second oil cylinder 2 passes through 3 times stations of stroke valve, the rod chamber of the first oil cylinder 1, oil-through hole 111, B
Mouth oil return；When the second 2 protruding little by little displacement of oil cylinder, collision block 221 is just detached from stroke valve 3,2 rod chamber of the second oil cylinder
Also just can not oil return, carry out state as shown in Figure 3A, the second oil cylinder 2 starts the displacement stretched out when moment and can be ignored.
Only as a preferred solution, stroke valve 3 can also be by electronics for the set-up mode of above-mentioned collision block 221 and stroke valve 3
Control controls stroke valve 3 by detecting the first oil cylinder 1 and 2 state in which of the second oil cylinder.
Preferably, the middle section of guide sleeve 13 is cricoid Oil Guide chamber 132, and the size of Oil Guide chamber 132 is logical more than Oil Guide
Road 131.Oil Guide channel 131 is only used for the flow direction of guide pressure oil, and the width bigger of Oil Guide chamber 132, in the stroke model of width
In enclosing, the pressure oil in oil-through hole 111 can be connected to Oil Guide chamber 132.
Further, for oil-through hole 111 along the circumferentially disposed two rows of First piston bar 11, the spacing of two rows of oil-through holes 111 is small
In the width of Oil Guide chamber 132, at a time two rows of oil-through holes 111 can be connected with Oil Guide chamber 132 simultaneously.Two rows of oil-through holes 111
Setting only as a preferred embodiment, may also be configured to three rows or more, the through-hole of platoon leader's bar shaped, through-hole edge can also be used
The axial directional distribution of First piston bar 11, oil-through hole 111 are located in the piston portion namely figure of First piston bar 11
Right side.
Preferably, the utility model uses following data ratio：The width L1 of Oil Guide chamber 132,132 front end distance of Oil Guide chamber
The spacing L2 of 13 front end of guide sleeve, the spacing L3 of two rows of oil-through holes 111, front end one are drained through oilhole 111 apart from First piston bar 11
Relationship between the spacing L4 of front end is：
L2<L3<L1；L4>L2；L3+L4<L1+L2；
Front end indicated above is the external part of oil cylinder namely right end shown in figure.
The utility model also provides a kind of crane, including above-mentioned sequential telescopic oil cylinder, the crane can be realized identical
Technique effect.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice, can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (6)
1. a kind of sequential telescopic oil cylinder, which is characterized in that including：
First oil cylinder (1), including First piston bar (11) and the first cylinder sleeve (12) are set in the inner cavity of the First piston bar (11)
Welding heart pipe (14) is set, the both ends connection of the welding heart pipe (14) simultaneously seals, described first with the First piston bar (11)
Open up oil-through hole (111) on the barrel of piston rod (11), the oil-through hole (111) is by the welding heart pipe (14) and described first
Annular space between piston rod (11) inner wall is connected to the rod chamber of first cylinder sleeve (12), and one end of annular space with
External world's connection；Guide sleeve (13) for being slidingly sealed cooperation with the piston rod (11) is set in first cylinder sleeve (12),
Oil Guide channel (131) is opened up on the guide sleeve (13), the Oil Guide channel (131) can be connected to the oil-through hole (111)；
Second oil cylinder (2), including second piston bar (21) and the second cylinder sleeve (22), the second piston bar (21) and described first
Cylinder sleeve (12) is fixedly connected；The rodless cavity of second oil cylinder (2) and the rodless cavity of first oil cylinder (1) are interconnected, institute
The rod chamber for stating the second oil cylinder (2) is connected to the Oil Guide channel (131)；
Stroke valve (3), both ends hydraulic fluid port are connected to the rod chamber of the Oil Guide channel (131) and first oil cylinder (1)；Institute
It includes upper station and lower station to state stroke valve (3), and the upper station is from the Oil Guide channel (131) to first oil cylinder (1)
Rod chamber unidirectional cutoff, the lower station makes the Oil Guide channel (131) and the rod chamber of first oil cylinder (1) mutually interconnect
It is logical.
2. sequential telescopic oil cylinder according to claim 1, which is characterized in that the stroke valve (3) is fixed on described first
On cylinder sleeve (12), collision block (221) is set, the collision block (221) can connect with the stroke valve (3) on second cylinder sleeve (22)
It touches, to switch the station of the stroke valve (3)；When first oil cylinder (1) and second oil cylinder (2) complete retraction, institute
State collision block (221) and the stroke valve (3) exactly in contact with.
3. sequential telescopic oil cylinder according to claim 2, which is characterized in that the middle section of the guide sleeve (13) is ring
The size of the Oil Guide chamber (132) of shape, the Oil Guide chamber (132) is more than the Oil Guide channel (131).
4. sequential telescopic oil cylinder according to claim 3, which is characterized in that the oil-through hole (111) is lived along described first
The circumferentially disposed two rows of stopper rod (11), the width for being smaller than the Oil Guide chamber (132) of two rows of oil-through holes (111).
5. sequential telescopic oil cylinder according to claim 4, which is characterized in that the width L1 of the Oil Guide chamber (132), described
Spacing L2 of Oil Guide chamber (132) front end apart from the guide sleeve (13) front end, two rows of oil-through holes (111) spacing L3, preceding
The relationship between spacing L4 of the oil-through hole (111) apart from the First piston bar (11) front end described in a row is held to be：
L2<L3<L1；L4>L2；L3+L4<L1+L2.
6. a kind of crane, which is characterized in that including sequential telescopic oil cylinder described in any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721481846.7U CN207715463U (en) | 2017-11-08 | 2017-11-08 | A kind of sequential telescopic oil cylinder and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721481846.7U CN207715463U (en) | 2017-11-08 | 2017-11-08 | A kind of sequential telescopic oil cylinder and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207715463U true CN207715463U (en) | 2018-08-10 |
Family
ID=63061034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721481846.7U Withdrawn - After Issue CN207715463U (en) | 2017-11-08 | 2017-11-08 | A kind of sequential telescopic oil cylinder and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207715463U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630856A (en) * | 2017-11-08 | 2018-01-26 | 安徽星马专用汽车有限公司 | A kind of sequential telescopic oil cylinder and crane |
| CN109973463A (en) * | 2019-04-22 | 2019-07-05 | 韶关市起重机厂有限责任公司 | A kind of oil cylinder, Multi-cylinder sequential telescopic mechanism and engineering machinery that energy reliable sequence is flexible |
| CN114352590A (en) * | 2022-01-13 | 2022-04-15 | 四川鼎鸿智电装备科技有限公司 | Double-cylinder hydraulic mechanism and pressure equipment |
-
2017
- 2017-11-08 CN CN201721481846.7U patent/CN207715463U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630856A (en) * | 2017-11-08 | 2018-01-26 | 安徽星马专用汽车有限公司 | A kind of sequential telescopic oil cylinder and crane |
| CN107630856B (en) * | 2017-11-08 | 2023-11-28 | 安徽星马专用汽车有限公司 | Sequential telescopic oil cylinder and crane |
| CN109973463A (en) * | 2019-04-22 | 2019-07-05 | 韶关市起重机厂有限责任公司 | A kind of oil cylinder, Multi-cylinder sequential telescopic mechanism and engineering machinery that energy reliable sequence is flexible |
| CN109973463B (en) * | 2019-04-22 | 2021-03-02 | 韶关市起重机厂有限责任公司 | Oil cylinder capable of reliably and sequentially stretching, multi-oil-cylinder sequential stretching mechanism and engineering machinery |
| CN114352590A (en) * | 2022-01-13 | 2022-04-15 | 四川鼎鸿智电装备科技有限公司 | Double-cylinder hydraulic mechanism and pressure equipment |
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