CN105605022B - A kind of Multi-cylinder sequential telescopic mechanism and engineering machinery - Google Patents
A kind of Multi-cylinder sequential telescopic mechanism and engineering machinery Download PDFInfo
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- CN105605022B CN105605022B CN201610143635.6A CN201610143635A CN105605022B CN 105605022 B CN105605022 B CN 105605022B CN 201610143635 A CN201610143635 A CN 201610143635A CN 105605022 B CN105605022 B CN 105605022B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of Multi-cylinder sequential telescopic mechanism and engineering machinery, including the first oil cylinder, the second oil cylinder and third oil cylinder, first oil cylinder, the second oil cylinder and third oil cylinder include piston rod, cylinder barrel, rodless cavity oil circuit and rod chamber oil circuit, stroke valve is both provided between first oil cylinder and the second oil cylinder, between second oil cylinder and third oil cylinder, stroke valve limiting plate is both provided on the cylinder barrel tail end of second oil cylinder and third oil cylinder, the stroke valve realizes that working position switches by being contacted with stroke valve limiting plate；The communicating pipe for connecting adjacent oil cylinder is provided between first oil cylinder, the second oil cylinder and third oil cylinder；Oil Guide pipeline is both provided on first oil cylinder and the second oil cylinder, wherein, the Oil Guide pipeline includes outer tube and inner tube, and the M ends of the outer tube are connected with piston rod, and the N-terminal of said inner tube is connected with cylinder barrel.The present invention does not increase the pressure of system while can realize that multistage (oil cylinder number is more than 2) oil cylinder is flexible easily.
Description
Technical field
The present invention relates to Multi-cylinder sequential control technology field, more particularly to a kind of Multi-cylinder sequential telescopic mechanism and including
The engineering machinery of the telescoping mechanism.
Background technology
Current most of crane telescopic mechanisms are as driving element, wherein the lifting of four section telescopic arms by hydraulic cylinder
Machine uses two-stage stretching oil cylinder, the cranes of five section telescopic arms using three-level telescopic oil cylinder, due to different telescopic arms section not
Equally (i.e. module of anti-bending section is different), thus oil cylinder realize sequential telescopic can reduce the smaller crane arm of section modulus by
Power hangs load performance so as to improve entire crane arm.
Currently, it is domestic to use the two-stage oil cylinder telescoping mechanism shown in FIG. 1 based on sequence valve 20 and stroke valve 7 mostly,
Under identical stressing conditions, since the inlet and outlet pressure of pressure reducing valve is there are pressure difference (being assumed to be P), so needed for the first oil cylinder 1 is flexible
2 low P of the second oil cylinder of pressure ratio, therefore can the first oil cylinder 1 first stretch out, after the first oil cylinder 1 is fully extended, the second oil cylinder 2 is again
It stretches out, so as to fulfill sequential telescopic.But under identical external force, due to needing to overcome the pressure differential of pressure reducing valve, the second oil
The pressure of entire hydraulic system will significantly increase (increase P) when cylinder 2 stretches out.So as to cause Hydraulic System Fever it is larger etc. it is unfavorable because
Element.In addition to this, (N- is additionally required to realize N number of oil cylinder sequential telescopic (i.e. Multi-cylinder sequential telescopic) using the mechanism
1) * P sequence valves pressure overcomes the resistance of N-1 sequence valve, for current hydraulic system, when N is more than 2, due to
Power is excessively high needed for pressure, can not substantially realize.
Invention content
In view of this, the present invention proposes a kind of Multi-cylinder sequential telescopic mechanism and engineering machinery, to solve existing Multi-cylinder
The technical issues of hydraulic system of telescoping mechanism, larger, required pressure of generating heat when oil cylinder stretches is higher.
On the one hand, the present invention provides a kind of Multi-cylinder sequential telescopic mechanism, including the first oil cylinder, the second oil cylinder and third
Oil cylinder, first oil cylinder, the second oil cylinder and third oil cylinder include piston rod, cylinder barrel, rodless cavity oil circuit and rod chamber oil circuit,
Between first oil cylinder and the second oil cylinder, it is both provided with stroke valve between second oil cylinder and third oil cylinder, described second
Stroke valve limiting plate is both provided on the cylinder barrel tail end of oil cylinder and third oil cylinder, the stroke valve with stroke valve limiting plate by connecing
It touches and realizes working position switching；It is provided with to connect adjacent oil cylinder between first oil cylinder, the second oil cylinder and third oil cylinder
Communicating pipe；Oil Guide pipeline is both provided on first oil cylinder and the second oil cylinder, wherein, the Oil Guide pipeline includes outer tube and interior
Pipe, the M ends of the outer tube are connected with piston rod, and the N-terminal of said inner tube is connected with cylinder barrel.
Further, the connecting tube includes the first connecting tube and the second connecting tube, the rod chamber oil of first oil cylinder
Road is connected by the first connecting tube with the rod chamber oil circuit of the second oil cylinder, and the rodless cavity oil circuit of second oil cylinder passes through second
Connecting tube is connected with the Oil Guide pipeline of the first oil cylinder.
Further, the connecting tube includes third connecting tube and the 4th connecting tube, the rod chamber oil of the third oil cylinder
Road is connected by third connecting tube with the rod chamber oil circuit of the second oil cylinder, and the rodless cavity oil circuit of the third oil cylinder passes through the 4th
Connecting tube is connected with the Oil Guide pipeline of the second oil cylinder.
Further, it is respectively arranged with A mouthfuls and B mouthfuls on first oil cylinder, the second oil cylinder and third oil cylinder, described first
The rodless cavity oil circuit of oil cylinder, the second oil cylinder and third oil cylinder is connected respectively with its B mouthfuls, first oil cylinder, the second oil cylinder and
The rod chamber oil circuit of third oil cylinder is connected respectively with its A mouthfuls.
Further, it is provided with the first check valve between the rodless cavity oil circuit of first oil cylinder and its B mouthfuls, fluid is from B
Mouthful rodless cavity oil circuit is flowed into, be provided with the second check valve between the Oil Guide pipeline of first oil cylinder and its B mouthfuls, fluid is from Oil Guide
Pipeline flows to B mouthfuls.
Further, it is provided with the first check valve between the rodless cavity oil circuit of second oil cylinder and its B mouthfuls, fluid is from B
Mouthful rodless cavity oil circuit is flowed into, be provided with the second check valve between the Oil Guide pipeline of second oil cylinder and its B mouthfuls, fluid is from Oil Guide
Pipeline flows to B mouthfuls.
Further, first check valve is close to B mouthfuls of settings；And/or second check valve is close to B mouthfuls of settings.
Further, an inner tube is additionally provided in said inner tube and leads to hydraulic fluid port, fluid leads to hydraulic fluid port inflow or stream through said inner tube
Go out.
In conclusion the present invention provides a kind of Multi-cylinder sequential telescopic mechanism, which includes the first oil cylinder, the second oil
Cylinder, third oil cylinder, stroke valve, stroke valve limiting plate and connecting tube, wherein, between first oil cylinder and the second oil cylinder, second
It is both provided with stroke valve between oil cylinder and third oil cylinder, row is both provided on the cylinder barrel tail end of second oil cylinder and third oil cylinder
Journey valve limiting plate, the stroke valve realize that working position switches by being contacted with stroke valve limiting plate, first oil cylinder, the second oil
The communicating pipe for connecting adjacent oil cylinder is provided between cylinder and third oil cylinder, meanwhile, the first oil cylinder include piston rod, cylinder barrel,
Be oriented to oil pipe, rodless cavity oil circuit and rod chamber oil circuit, the second oil cylinder include piston rod, cylinder barrel, be oriented to oil pipe, rodless cavity oil circuit and
Rod chamber oil circuit, third oil cylinder includes piston rod, cylinder barrel, rodless cavity oil circuit and rod chamber oil circuit, in addition, the Oil Guide pipeline packet
Include outer tube and inner tube, the M ends of the outer tube are connected with piston rod so that outer tube with piston rod movement, the N-terminal of said inner tube with
Cylinder barrel is connected so that inner tube is moved with cylinder barrel.Compared with prior art, since the present invention is not controlled using sequence valve, so not
System pressure can be caused to increase because of sequence valve oil inlet and outlet pressure difference, therefore, can realize three oil cylinder sequential telescopics easily,
The sequential telescopic of even more oil cylinders, and system pressure will not be increased.
On the other hand, the present invention also provides a kind of engineering machinery for including Multi-cylinder sequential telescopic mechanism, the Multi-cylinders
Sequential telescopic mechanism is any one of them Multi-cylinder sequential telescopic mechanism thereon.
Further, the engineering machinery is crane.
Above-mentioned engineering machinery obviously has whole advantageous effects of aforementioned Multi-cylinder sequential telescopic mechanism, no longer superfluous herein
It states.
Description of the drawings
The attached drawing for forming the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram of two-stage oil cylinder telescoping mechanism in the relevant technologies；
Fig. 2 is the structure diagram of Multi-cylinder sequential telescopic mechanism of the present invention；
Fig. 3 is the structure diagram of Oil Guide pipeline in Fig. 2；
Fig. 4 is the use state diagram of Multi-cylinder sequential telescopic mechanism when the first oil cylinder of the invention is stretched entirely；
Fig. 5 is the use state signal of Multi-cylinder sequential telescopic mechanism when the first oil cylinder and the second oil cylinder of the invention are stretched entirely
Figure；
Fig. 6 is the use of Multi-cylinder sequential telescopic mechanism when the first oil cylinder of the present invention, the second oil cylinder and third oil cylinder are stretched entirely
Status diagram；
Fig. 7 is that the first oil cylinder and the second oil cylinder of the invention are stretched entirely, Multi-cylinder sequential telescopic mechanism when third oil cylinder is full reduced
Use state diagram；
Fig. 8 is that first oil cylinder of the invention is stretched entirely, Multi-cylinder sequential telescopic mechanism when the second oil cylinder and full reduced third oil cylinder
Use state diagram.
Fig. 1 reference signs
1 the second oil cylinder of Ffirst cylinder 2,7 stroke valve
20 sequence valves
Fig. 2 is to Fig. 8 reference signs
1 the second oil cylinder of Ffirst cylinder 2,3 third oil cylinder
4 rod chamber oil circuit, 5 rodless cavity oil circuit, 6 Oil Guide pipeline
7 stroke valve, 8 stroke valve limiting plate, 9 piston rod
10 cylinder barrel, 11 first connecting tube, 12 second connecting tube
15 first check valve of the 4th connecting tube of 13 third connecting tube 14
16 second check valve, 17 rod chamber, 18 rodless cavity
61 outer tube, 62 inner tube, 63 inner tube leads to hydraulic fluid port
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Fig. 2, a kind of Multi-cylinder sequential telescopic mechanism, including the first oil cylinder 1, the second oil cylinder 2 and third oil cylinder 3,
Wherein, the first oil cylinder 1 includes piston rod 9, cylinder barrel 10, rod chamber 17, rodless cavity 18, rod chamber oil circuit 4,5 and of rodless cavity oil circuit
Oil Guide pipeline 6, the second oil cylinder 2 also include piston rod 9, cylinder barrel 10, rod chamber 17, rodless cavity 18, rod chamber oil circuit 4, rodless cavity
Oil circuit 5 and Oil Guide pipeline 6, third oil cylinder 3 then include piston rod 9, cylinder barrel 10, rod chamber 17, rodless cavity 18, rodless cavity oil circuit 5
With rod chamber oil circuit 4, specifically, aforementioned Oil Guide pipeline 6 includes outer tube 61 and inner tube 62, and the M ends of outer tube 61 (are shown as in Fig. 3
Left end) it is connected with piston rod 9 so that outer tube 61 is moved with piston rod 9, the N-terminal (right end is shown as in Fig. 3) and cylinder of inner tube 62
Cylinder 10 is connected so that inner tube 62 is moved with cylinder barrel 10, and an inner tube is additionally provided in inner tube 62 and leads to hydraulic fluid port 63, and fluid is through inner tube
Logical hydraulic fluid port 63 flows in or out；In addition, it is all provided between the first oil cylinder 1 and the second oil cylinder 2, between the second oil cylinder 2 and third oil cylinder 3
Stroke valve 7 is equipped with, and stroke valve limiting plate 8, stroke are also both provided on 10 tail end of cylinder barrel of the second oil cylinder 2 and third oil cylinder 3
Valve 7 is to realize that working position switches by the contact with stroke valve limiting plate 8；In addition, the first oil cylinder 1, the second oil cylinder 2 and third oil
The communicating pipe for connecting adjacent oil cylinder is provided between cylinder 3.It should be noted that it is set to the first oil cylinder 1 and the second oil cylinder 2
Between stroke valve 7 be specifically installed on Ffirst cylinder 2 cylinder barrel 10 tail end；It is set between the second oil cylinder 2 and third oil cylinder 3
The specific cylinder barrel 10 for being installed on the second oil cylinder 2 of stroke valve 7 tail end.
Meanwhile as shown in Fig. 2, be respectively arranged with A mouthfuls and B mouthfuls on the first oil cylinder 1, the second oil cylinder 2 and third oil cylinder 3,
The rodless cavity oil circuit 5 of one oil cylinder 1, the second oil cylinder 2 and third oil cylinder 3 is connected respectively with its B mouthfuls, the first oil cylinder 1, the second oil cylinder
2 and the rod chamber oil circuit 4 of third oil cylinder 3 be connected respectively with its A mouthfuls.
In further technical solution, aforementioned connecting tube includes the first connecting tube 11, the second connecting tube 12, third connection
13 and the 4th connecting tube 14 of pipe, the rod chamber oil circuit 4 of the first oil cylinder 1 pass through the first connecting tube 11 and the rod chamber of the second oil cylinder 2
Oil circuit 4 is connected, and the rodless cavity oil circuit 5 of the second oil cylinder 2 is connected by the second connecting tube 12 with the Oil Guide pipeline 6 of the first oil cylinder 1
Logical, the rod chamber oil circuit 4 of third oil cylinder 3 is connected by third connecting tube 13 with the rod chamber oil circuit 4 of the second oil cylinder 2, third
The rodless cavity oil circuit 5 of oil cylinder 3 is connected by the 4th connecting tube 14 with the Oil Guide pipeline 6 of the second oil cylinder 2.
By above-mentioned setting, when high pressure liquid pressure oil enters the B mouths of the first oil cylinder 1, high pressure liquid pressure oil passes through the first oil cylinder 1
Piston rod 9 inside rodless cavity oil circuit 5 reach rodless cavity 18, push the first oil cylinder 1 stretch out, at this point, due to being set to first
The oil circuit of stroke valve 7 between 1 and second oil cylinder 2 of oil cylinder belongs to conducting state, as shown in figure 4, therefore, the second oil cylinder 2 and
Three oil cylinders 3 can also stretch out one section of small distance (i.e. the stroke of stroke valve 7), stretch out one section in the second oil cylinder 2 and third oil cylinder 3
After small distance, the oil circuit of stroke valve 7 is closed, and only the first oil cylinder 1 continues to stretch out at this time, until all stretching out, specifically such as
Shown in Fig. 4.Fig. 4 is the use state diagram of Multi-cylinder sequential telescopic mechanism when the first oil cylinder is stretched entirely.
Since the first oil cylinder 1 is during stretching, the inner tube 62 of Oil Guide pipeline 6 is also synchronous to stretch out, when the first oil cylinder 1 is complete
After portion is stretched out, as shown in figure 4, the inner tube in the Oil Guide pipeline 6 of the first oil cylinder 1 leads to hydraulic fluid port 63 by the first oil cylinder 1 of entrance without bar
In chamber 18.At this point, the high pressure liquid pressure oil in the rodless cavity 18 of the first oil cylinder 1 will lead to hydraulic fluid port 63 through inner tube and enter the first oil cylinder 1
In Oil Guide pipeline 6, subsequently into the second connecting tube 12, and then enter the B mouths of the second oil cylinder 2, stretched out with above-mentioned first oil cylinder 1
Operation principle, when high pressure liquid pressure oil enters the B mouths of the second oil cylinder 2, high pressure liquid pressure oil is by the piston rod 9 of the second oil cylinder 2
The rodless cavity oil circuit 5 in portion reaches rodless cavity 18, the second oil cylinder 2 is pushed to stretch out, at this point, due to being set to the second oil cylinder 2 and third
The oil circuit of stroke valve 7 between oil cylinder 3 belongs to conducting state, and therefore, third oil cylinder 3 can also stretch out one section of small distance (i.e.
The stroke of stroke valve 7), after third oil cylinder 3 stretches out one section of small distance, the oil circuit of stroke valve 7 is closed, and at this time only second
Oil cylinder 2 continues to stretch out, until the second oil cylinder 2 all stretches out, it is specific as shown in Figure 5.Fig. 5 is that the first oil cylinder, the second oil cylinder are complete
The use state diagram of Multi-cylinder sequential telescopic mechanism when stretching.
After the second oil cylinder 2 all stretches out, similarly, the inner tube in the Oil Guide pipeline 6 of the second oil cylinder 2 leads to hydraulic fluid port 63 will be into
In the rodless cavity 18 for entering the second oil cylinder 2, at this point, the high pressure liquid pressure oil of the rodless cavity 18 of the second oil cylinder 2 then will lead to hydraulic fluid port through inner tube
63 enter the Oil Guide pipeline 6 of the second oil cylinder 2, subsequently into the 4th connecting tube 14, and then enter the B mouths of third oil cylinder 3；Similarly,
When high pressure liquid pressure oil enters the B mouths of third oil cylinder 3, high pressure liquid pressure oil is by the rodless cavity inside the piston rod 9 of third oil cylinder 3
Oil circuit 5 reaches rodless cavity 18, and promotion third oil cylinder 3 stretches out, until third oil cylinder 3 all stretches out, it is specific as shown in Figure 6.Fig. 6 is
The use state diagram of Multi-cylinder sequential telescopic mechanism when being stretched entirely for the first oil cylinder, the second oil cylinder and third oil cylinder.
In the present invention, as shown in Fig. 2, being provided with first between the rodless cavity oil circuit 5 of the first oil cylinder 1 and its B mouthfuls unidirectionally
Valve 15, fluid flow into rodless cavity oil circuit 5 from B mouthfuls, and it is unidirectional that second is provided between the Oil Guide pipeline 6 of the first oil cylinder 1 and its B mouthfuls
Valve 16, fluid flow to B mouthfuls from Oil Guide pipeline 6；Meanwhile second oil cylinder 2 rodless cavity oil circuit 5 and its B mouthfuls between be provided with first
Check valve 15, fluid flow into rodless cavity oil circuit 5 from B mouthfuls, and it is single that second is provided between the Oil Guide pipeline 6 of the second oil cylinder 2 and its B mouthfuls
To valve 16, fluid flows to B mouthfuls from Oil Guide pipeline 6.Preferably, the first check valve 15 is close to B mouthfuls of settings；And/or second check valve
16 close to B mouthfuls of settings.
When high pressure liquid pressure oil is from the A mouths of the first oil cylinder 1 into fashionable, high pressure liquid pressure oil will be by the rod chamber through the first oil cylinder 1
Oil circuit 4 enters 17 body of rod chamber of the first oil cylinder 1, then enters the rod chamber 17 of the second oil cylinder 2 through the first connecting tube 11, then through the
Three connecting tubes 13 enter the rod chamber 17 of third oil cylinder 3, since the rodless cavity oil circuit 5 in the first oil cylinder 1 devises at B mouths
First check valve 15, the hydraulic oil of the rodless cavity 18 of the first oil cylinder 1 then can not be from B mouthfuls of reflux, and then form an airtight cavity,
Therefore, the first oil cylinder 1 can not bounce back；Similarly, due to devising also first at B mouths in the rodless cavity oil circuit 5 of the second oil cylinder 2
Check valve 15, the hydraulic oil of the rodless cavity 18 of the second oil cylinder 2 then can not be from B mouthfuls of reflux, and then the second oil cylinder 2 also forms at this time
One confined space, so, the second oil cylinder 2 can not also bounce back；When high pressure liquid pressure oil enters the rod chamber 17 of third oil cylinder 3,
The oil guide pipe that the hydraulic oil of the rodless cavity 18 of third oil cylinder 3 will enter the second oil cylinder 2 through 5 and the 4th connecting tube 14 of rodless cavity oil circuit
Road 6, then the Oil Guide pipeline 6 through the second connecting tube 12 and the first oil cylinder 1 are flowed by the second check valve 16 from the B mouths of the first oil cylinder 1
Go out, realize the retraction of third oil cylinder 3, until third oil cylinder 3 all bounces back, specifically as shown in Figure 7.Fig. 7 is the present invention first
Oil cylinder and the second oil cylinder are stretched entirely, the use state diagram of Multi-cylinder sequential telescopic mechanism when third oil cylinder is full reduced.
After all retractions of third oil cylinder 3, promotion is set to the by stroke valve limiting plate 8 on third oil cylinder 3
Stroke valve 7 on the cylinder barrel 10 of two oil cylinders 2 so that 7 oil inlet and outlet of the trip valve is connected, therefore, the rodless cavity 18 of the second oil cylinder 2
In hydraulic oil will by the trip valve 7 enter the second oil cylinder 2 Oil Guide pipeline 6, finally B mouths through the second oil cylinder 2, second company
Take over 12, the first oil cylinder 1 Oil Guide pipeline 6 flow out to the B mouths of the first oil cylinder 1, it is final to realize the full reduced of the second oil cylinder 2, specifically
As shown in Figure 8.Fig. 8 is that first oil cylinder of the invention is stretched entirely, Multi-cylinder sequential telescopic machine when the second oil cylinder and full reduced third oil cylinder
The use state diagram of structure.
Similarly, after the second oil cylinder 2 is fully retracted, the stroke valve limiting plate 8 on the second oil cylinder 2, which will push, to be set
Stroke valve 7 on the cylinder barrel 10 of the first oil cylinder 1 so that 7 oil inlet and outlet of the trip valve be connected, therefore, the first oil cylinder 1 without bar
The Oil Guide pipeline 6 that hydraulic oil in chamber 18 will enter the first oil cylinder 1 by the trip valve 7 finally flows out to the B of the first oil cylinder 1
Mouthful, it is final to realize being fully retracted for the first oil cylinder 1.
In addition, it is worth mentioning that the quantity of oil cylinder is not limited in three (the first oil cylinder 1, the second oil cylinders in the present invention
2 and third oil cylinder 3), can also be four, five or more, need to only increase between the first oil cylinder 1 and third oil cylinder 3
Oil cylinder, stroke valve and the connecting tube consistent with 2 structure of the second oil cylinder adds the flexible principle of oil cylinder and stretching for the second oil cylinder
Contracting principle is consistent.
In conclusion Multi-cylinder sequential telescopic mechanism provided by the invention, compared with prior art, under equal conditions, second
Required pressure is essentially the same when stretching when oil cylinder 2 and third oil cylinder 3 stretch with the first oil cylinder 1, will not increase system pressure, solution
It has determined the hydraulic system of existing Multi-cylinder telescoping mechanism, the technical issues of larger, required pressure of generating heat when oil cylinder stretches is higher,
Meanwhile also achieve the flexible of multistage (oil cylinder number is more than 2) oil cylinder.
On the other hand, the present invention also provides a kind of engineering machinery for including Multi-cylinder sequential telescopic mechanism, the Multi-cylinders
Sequential telescopic mechanism is the Multi-cylinder sequential telescopic mechanism described thereon.Further, the engineering machinery is crane, this
The other structures of heavy-duty machine can refer to existing and improved technology, herein without repeating.
Above-mentioned engineering machinery obviously has whole advantageous effects of aforementioned Multi-cylinder sequential telescopic mechanism, can realize easily
While multistage (oil cylinder number is more than 2) oil cylinder stretches, the pressure of system is not increased.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of Multi-cylinder sequential telescopic mechanism, including the first oil cylinder (1), the second oil cylinder (2) and third oil cylinder (3), described
One oil cylinder (1), the second oil cylinder (2) and third oil cylinder (3) include piston rod (9), cylinder barrel (10), rodless cavity oil circuit (5) and have
Rod cavity oil circuit (4), it is characterised in that：Between first oil cylinder (1) and the second oil cylinder (2), second oil cylinder (2) and third
It is both provided with stroke valve (7) between oil cylinder (3), is all provided on cylinder barrel (10) tail end of second oil cylinder (2) and third oil cylinder (3)
Stroke valve limiting plate (8) is equipped with, the stroke valve (7) realizes that working position switches by being contacted with stroke valve limiting plate (8)；It is described
The connecting tube for connecting adjacent oil cylinder is provided between first oil cylinder (1), the second oil cylinder (2) and third oil cylinder (3)；Described
Oil Guide pipeline (6) is both provided on one oil cylinder (1) and the second oil cylinder (2), wherein, the Oil Guide pipeline (6) includes outer tube (61)
With inner tube (62), the M ends of the outer tube (61) are connected with piston rod (9), and the N-terminal of said inner tube (62) is connected with cylinder barrel (10)；
An inner tube is additionally provided in said inner tube (62) and leads to hydraulic fluid port (63), fluid leads to hydraulic fluid port (63) inflow or stream through said inner tube
Go out；
The connecting tube includes the first connecting tube (11) and the second connecting tube (12), the rod chamber oil circuit of first oil cylinder (1)
(4) be connected by the first connecting tube (11) with the rod chamber oil circuit (4) of the second oil cylinder (2), second oil cylinder (2) without bar
Chamber oil circuit (5) is connected by the second connecting tube (12) with the Oil Guide pipeline (6) of the first oil cylinder (1).
2. Multi-cylinder sequential telescopic mechanism as described in claim 1, it is characterised in that：The connecting tube includes third connecting tube
(13) and the 4th connecting tube (14), the rod chamber oil circuit (4) of the third oil cylinder (3) pass through third connecting tube (13) and the second oil
The rod chamber oil circuit (4) of cylinder (2) is connected, the rodless cavity oil circuit (5) of the third oil cylinder (3) by the 4th connecting tube (14) with
The Oil Guide pipeline (6) of second oil cylinder (2) is connected.
3. the Multi-cylinder sequential telescopic mechanism as described in any one of claim 1 to 2, it is characterised in that：First oil cylinder
(1), A mouthfuls and B mouthfuls, first oil cylinder (1), the second oil cylinder (2) are respectively arranged on the second oil cylinder (2) and third oil cylinder (3)
It is connected respectively with its B mouthfuls with the rodless cavity oil circuit (5) of third oil cylinder (3), first oil cylinder (1), the second oil cylinder (2) and
The rod chamber oil circuit (4) of three oil cylinders (3) is connected respectively with its A mouthfuls.
4. Multi-cylinder sequential telescopic mechanism as claimed in claim 3, it is characterised in that：The rodless cavity of first oil cylinder (1)
The first check valve (15) is provided between oil circuit (5) and its B mouthfuls, fluid flows into rodless cavity oil circuit (5), first oil from B mouthfuls
The second check valve (16) is provided between the Oil Guide pipeline (6) of cylinder (1) and its B mouthfuls, fluid flows to B mouthfuls from Oil Guide pipeline (6).
5. Multi-cylinder sequential telescopic mechanism as claimed in claim 4, it is characterised in that：The rodless cavity of second oil cylinder (2)
The first check valve (15) is provided between oil circuit (5) and its B mouthfuls, fluid flows into rodless cavity oil circuit (5), second oil from B mouthfuls
The second check valve (16) is provided between the Oil Guide pipeline (6) of cylinder (2) and its B mouthfuls, fluid flows to B mouthfuls from Oil Guide pipeline (6).
6. Multi-cylinder sequential telescopic mechanism as claimed in claim 5, it is characterised in that：First check valve (15) is close to B
Mouth setting；And/or second check valve (16) is close to B mouthfuls of settings.
7. a kind of engineering machinery, including Multi-cylinder sequential telescopic mechanism, it is characterised in that：The Multi-cylinder sequential telescopic mechanism is
Multi-cylinder sequential telescopic mechanism according to any one of claims 1 to 6.
8. engineering machinery as claimed in claim 7, it is characterised in that：The engineering machinery is crane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143635.6A CN105605022B (en) | 2016-03-14 | 2016-03-14 | A kind of Multi-cylinder sequential telescopic mechanism and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143635.6A CN105605022B (en) | 2016-03-14 | 2016-03-14 | A kind of Multi-cylinder sequential telescopic mechanism and engineering machinery |
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| CN105605022A CN105605022A (en) | 2016-05-25 |
| CN105605022B true CN105605022B (en) | 2018-06-12 |
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| CN201610143635.6A Active CN105605022B (en) | 2016-03-14 | 2016-03-14 | A kind of Multi-cylinder sequential telescopic mechanism and engineering machinery |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106006412A (en) * | 2016-06-06 | 2016-10-12 | 梁协铭 | Eight-section lazy arm for crane |
| 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 |
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