CN104265730B - Boom hydraulic cylinder and boom type concrete pump car - Google Patents
Boom hydraulic cylinder and boom type concrete pump car Download PDFInfo
- Publication number
- CN104265730B CN104265730B CN201410562624.2A CN201410562624A CN104265730B CN 104265730 B CN104265730 B CN 104265730B CN 201410562624 A CN201410562624 A CN 201410562624A CN 104265730 B CN104265730 B CN 104265730B
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- Prior art keywords
- hydraulic cylinder
- hydraulic
- arm support
- groove
- boom
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Classifications
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jib Cranes (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a boom hydraulic cylinder, comprising a hydraulic cylinder body and a hydraulic rod, wherein a piston is arranged on the hydraulic rod; the axis of one end, positioned in the hydraulic cylinder body, of the hydraulic rod is provided with a groove with a circular cross section; one end, provided with the piston, of the hydraulic rod is provided with a plurality of through grooves communicating with the cavity of the hydraulic cylinder body. According to the boom hydraulic cylinder provided by the invention, as the contact area of hydraulic oil and the hydraulic rod is increased by the provided through grooves, thrust of the hydraulic oil to the hydraulic rod is increased. The problem of insufficient thrust due to that, during the working process of the integrated boom of the boom type concrete pump car, after the hydraulic rod of the boom hydraulic cylinder makes contact with the cylinder bottom of the hydraulic cylinder body, contact area of the hydraulic oil and the hydraulic rod is small is overcome.
Description
Technical field
The present invention relates to field of mechanical technique, more particularly, to a kind of arm support hydraulic cylinder and jib concrete pump truck.
Background technology
Jib concrete pump truck be a kind of by continuous conveying concrete to pour scene pumping mechanism and be used for cloth
Boom system be integrated in the equipment on automobile chassis.Wherein, the overall arm support in boom system is made up of more piece arm support, more piece
It is connected to hydraulic cylinder between adjacent arm support, realize the different angles of overall arm support by the expansion fit of each hydraulic cylinder
And the cloth of differing heights.That joint arm frame that overall arm support is connected with jib concrete pump truck be referred to as an arm, connect an arm and
The hydraulic cylinder of jib concrete pump truck is referred to as arm support hydraulic cylinder, and the hydraulic cylinder of arm support hydraulic cylinder is connected to jib concrete
On the turntable of pump truck.
Arm support hydraulic cylinder includes hydraulic cylinder and hydraulic stem, wherein, hydraulic stem is installed piston, piston is arranged on hydraulic stem
The one end in hydraulic cylinder, the space in hydraulic cylinder is divided into two not connected spaces, hydraulic stem is in hydraulic pressure
Up and down motion band piston in cylinder body moves up and down in hydraulic cylinder.In the work of overall arm support, arm support hydraulic cylinder flexible
During, after the cylinder bottom of the hydraulic stem and hydraulic cylinder that usually can run into arm support hydraulic cylinder contacts, because hydraulic oil contacts hydraulic pressure
The area of bar is little, leads to hydraulic oil to push away hypodynamic problem to hydraulic stem.
Content of the invention
In view of this, first purpose of the present invention is to provide a kind of arm support hydraulic cylinder, to solve the liquid of arm support hydraulic cylinder
After depression bar contacts with the cylinder bottom of hydraulic cylinder, the area of the hydraulic stem being touched due to hydraulic oil is little, leads to hydraulic oil to hydraulic pressure
Bar push away hypodynamic problem.Second object of the present invention is to provide a kind of jib concrete pump truck.
In order to realize first purpose, the invention provides following scheme:
A kind of arm support hydraulic cylinder, including hydraulic cylinder and hydraulic stem, described hydraulic stem is provided with piston, described hydraulic stem
The axle center positioned at the one end in described hydraulic cylinder to have cross section be circular groove, described hydraulic stem arranges described work
The groove of multiple cavitys connecting described hydraulic cylinder is had on one end of plug.
Preferably, described groove connects the cavity of described groove and described hydraulic cylinder.
Preferably, the cross section of described groove is rectangle.
Preferably, the number of described groove is 4.
Preferably, the internal diameter of described hydraulic cylinder is 320mm.
Preferably, the cross-sectional diameter of described groove is 70mm.
Preferably, the width of described groove is 20mm.
Preferably, the depth of described groove is 4mm.
It can be seen from above-mentioned technical scheme that, the arm support hydraulic cylinder that the present invention provides, including hydraulic cylinder and hydraulic stem,
Piston is provided with hydraulic stem, having cross section at the axle center of one end that hydraulic stem is located in hydraulic cylinder is circular groove,
Hydraulic stem arranges the groove of the cavity having multiple connection hydraulic cylinders on one end of described piston.The arm support liquid that the present invention provides
Cylinder pressure has the groove of the cavity of multiple connection hydraulic cylinders because its hydraulic stem is arranged on one end of described piston, that is opened is logical
Groove increases the area that hydraulic oil is contacted with hydraulic stem, makes hydraulic oil that the thrust of hydraulic stem is increased.Solve boom type coagulation
In the overall arm support work process of native pump truck, after the piston rod of arm support hydraulic cylinder contacts with the cylinder bottom of arm support hydraulic cylinder, due to
Hydraulic oil is little to hydraulic stem contact area and cause push away hypodynamic problem.
In order to realize above-mentioned second purpose, the present invention following technical scheme of offer:
A kind of jib concrete pump truck, including the arm support hydraulic cylinder described in above-mentioned any one.
It can be seen from above-mentioned technical scheme that, the jib concrete pump truck that the present invention provides includes above-mentioned any one
Described arm support hydraulic cylinder, so jib concrete pump truck also includes the beneficial effect of above-mentioned arm support hydraulic cylinder.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of arm support hydraulic cylinder of the prior art；
A kind of structural representation of arm support hydraulic cylinder that Fig. 2 provides for the embodiment of the present invention one；
A kind of structural representation of arm support hydraulic cylinder that Fig. 3 provides for the embodiment of the present invention two.
In wherein Fig. 1-Fig. 3:
Hydraulic cylinder 1, hydraulic stem 2, piston 3, groove 4, groove 5.
Specific embodiment
The invention discloses a kind of arm support hydraulic cylinder and a kind of jib concrete pump truck, the hydraulic stem of arm support hydraulic cylinder sets
That puts the cavity having multiple connection hydraulic cylinders on that one end of piston makes hydraulic stem when contacting with the cylinder bottom of hydraulic cylinder
The groove that can lift in the presence of hydraulic oil.These grooves increase the contact area of hydraulic oil and piston rod, make hydraulic pressure
Oil increases to the thrust that piston rod produces.Solve in the overall arm support work process of jib concrete pump truck, in arm support liquid
After the piston rod of cylinder pressure contacts with the cylinder bottom of arm support hydraulic cylinder, due to the little hydraulic pressure leading to of contact area to hydraulic stem for the hydraulic oil
Oil pushes away hypodynamic problem to hydraulic stem.
Wherein, groove is to mitigate the weight of hydraulic stem to mitigate the collision of the bottom to hydraulic cylinder, in hydraulic stem
Connection piston the axle center of one end at setting.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on this
Inventive embodiment, the every other enforcement that those of ordinary skill in the art are obtained under the premise of not making creative work
Example, broadly falls into the scope of protection of the invention.
Referring to Fig. 2, the accompanying drawing of the embodiment one providing for the present invention, the invention provides a kind of arm support hydraulic cylinder, including
Hydraulic cylinder 1, hydraulic stem 2, hydraulic stem 2 is provided with piston 3, opens at the axle center of one end that hydraulic stem 2 is located in hydraulic cylinder 1
Cross section is had to be circular groove 4, hydraulic stem 2 arranges the logical of the cavity having multiple connection hydraulic cylinders 1 on one end of piston 3
Groove 5.
The arm support hydraulic cylinder that the present invention provides has multiple connection hydraulic pressure because its hydraulic stem 2 is arranged on one end of piston 3
The groove 5 of the cavity of cylinder body 1, the groove 5 opened increases the area that hydraulic oil is contacted with hydraulic stem 2, makes hydraulic oil to hydraulic pressure
The thrust of bar 2 increases.Solve in the overall arm support work process of jib concrete pump truck, in the hydraulic stem of arm support hydraulic cylinder
After 2 contact with the cylinder bottom of hydraulic cylinder 1, due to hydraulic oil to the little hydraulic oil leading to of contact area of hydraulic stem 2 to hydraulic stem 2
Push away hypodynamic problem.
It should be noted that the depth and width of groove 5 will meet the strength demand of hydraulic stem 2.
Referring to Fig. 3, the accompanying drawing of the embodiment two providing for the present invention, arm support hydraulic cylinder and embodiment that the present embodiment provides
The arm support hydraulic cylinder structure of one offer is similar to, and only introduces difference, just repeats no more for identical point here.Hydraulic stem 2
On groove 5 communication groove 4 that has and hydraulic cylinder 1 cavity；And the shape of cross section of groove 5 is rectangle；In this enforcement
In example, the number of preferably groove 5 is 4；In the present embodiment, the internal diameter of hydraulic cylinder 1 is 320mm；In the present embodiment, recessed
The cross-sectional diameter of groove 4 is 70mm；In the present embodiment, the width of groove 5 is 20mm；In the present embodiment, the depth of groove 5
For 4mm；Hydraulic stem 2 is arranged on a diameter of 150mm of the one end in hydraulic cylinder 1.
In the present embodiment, arm support hydraulic cylinder is in hydraulic stem 2 taking the arm support hydraulic cylinder on jib concrete pump truck as a example
The power lifting hydraulic stem 2 with hydraulic cylinder 1 contact need is f=2400kn, and the pressure of hydraulic oil is p=35mpa.
Hydraulic stem 2 thrust under full contact situation is not f1, hydraulic stem 2 and liquid for hydraulic stem 2 and hydraulic cylinder 1 bottom
Force feed contact area is s1, a diameter of d1, according to formula, f=ps, and substitute into data:
F1=p*s1=p* π/4*d1*d1=35000000 × 3.14/4 × 320 × 320=2813440n=
2813.44kn.
Cylinder thrust under the hydraulic stem 2 of existing arm support hydraulic cylinder and hydraulic cylinder 1 bottom full contact situation reduces
Measure as f2, the contact area of minimizing is s2, a diameter of d2, according to formula, f=ps, substitute into data:
F2=p*s2=p* π/4*d2*d2=35000000 × 3.14/4 × 150 × 150=618018.75n=
618.01875kn.
Thrust f3 that now hydraulic stem 2 of existing arm support hydraulic cylinder is subject to is:
F3=f1-f2=2195.42kn.
And the power that arm support hydraulic cylinder lifts hydraulic stem 2 in hydraulic stem 2 and hydraulic cylinder 1 contact need is f=2400kn, by
This can obtain, existing arm support hydraulic cylinder after the hydraulic stem 2 of arm support hydraulic cylinder contacts with the cylinder bottom of arm support hydraulic cylinder, due to hydraulic pressure
The hydraulic stem 2 that oil causes to the rodless cavity thrust deficiency of hydraulic cylinder can not lifted.
For the arm support hydraulic cylinder in the present embodiment, the area of increase is the cross section s3 of groove 4 and 4 grooves 5 are in liquid
Area s4 on depression bar 2 end face direction, wherein, the cross-sectional diameter of groove 4 is d3, and groove 5 is on hydraulic stem 2 end face direction
The approximate long a in section is the rectangle that 40mm width b is 20mm, and its area is pressed rectangle and calculated.
Substitute into data, obtain thrust f4=p* (the s3+s4)=p* (π/4*d2*d2+4 × a*b) of the increase that hydraulic stem 2 is subject to
=35000000 × (3.14/4 × 70 × 70+4 × 40 × 20)=246.627kn
Thrust f5=f4+f3=246.627+2195.42=2442.047kn that hydraulic stem is subject to.
Being loaded with minimum thrust required for loading condition one arm oil cylinder horizontal development is 2400kn, due to the arm in the present embodiment
The thrust that the hydraulic stem 2 of frame hydraulic cylinder is subject to be 2442.047kn it can be seen that, the present invention provide arm support hydraulic cylinder hydraulic pressure
The thrust of bar 2 demand enough.
Present invention also offers a kind of jib concrete pump truck, including the arm support liquid described in above-mentioned any one embodiment
Cylinder pressure.The jib concrete pump truck that the present invention provides includes the arm support hydraulic cylinder described in above-mentioned any one, so boom type
Concrete mixer also includes the beneficial effect of above-mentioned arm support hydraulic cylinder.Specifically refer to the arm support hydraulic pressure of above-described embodiment introduction
Cylinder.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and inventive features phase
Consistent scope the widest.
Claims (7)
1. a kind of arm support hydraulic cylinder, including hydraulic cylinder (1) and hydraulic stem (2), described hydraulic stem (2) is provided with piston (3),
Having cross section at the axle center positioned at the one end in described hydraulic cylinder (1) of described hydraulic stem (2) is circular groove (4),
It is characterized in that, described hydraulic stem (2) arranges and has the described hydraulic cylinder of multiple connection (1) on one end of described piston (3)
The groove (5) of cavity；
The depth of described groove (5) is 4mm.
2. arm support hydraulic cylinder according to claim 1 is it is characterised in that described groove (5) connects described groove (4) and institute
State the cavity of hydraulic cylinder (1).
3. arm support hydraulic cylinder according to claim 2 is it is characterised in that the cross section of described groove (5) is rectangle.
4. the arm support hydraulic cylinder according to claim 2 or 3 is it is characterised in that the number of described groove (5) is 4.
5. arm support hydraulic cylinder according to claim 4 is it is characterised in that the internal diameter of described hydraulic cylinder (1) is 320mm.
6. arm support hydraulic cylinder according to claim 5 is it is characterised in that the cross-sectional diameter of described groove (4) is 70mm.
7. a kind of jib concrete pump truck is it is characterised in that include the arm support hydraulic pressure described in claim 1-6 any one
Cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562624.2A CN104265730B (en) | 2014-10-21 | 2014-10-21 | Boom hydraulic cylinder and boom type concrete pump car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562624.2A CN104265730B (en) | 2014-10-21 | 2014-10-21 | Boom hydraulic cylinder and boom type concrete pump car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265730A CN104265730A (en) | 2015-01-07 |
| CN104265730B true CN104265730B (en) | 2017-01-18 |
Family
ID=52157286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410562624.2A Active CN104265730B (en) | 2014-10-21 | 2014-10-21 | Boom hydraulic cylinder and boom type concrete pump car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265730B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0663369B2 (en) * | 1988-01-13 | 1994-08-22 | 極東開発工業株式会社 | Concrete pump truck |
| WO2000019039A1 (en) * | 1998-09-28 | 2000-04-06 | Putzmeister Aktiengesellschaft | Auto concrete pump |
| CN200940616Y (en) * | 2006-08-18 | 2007-08-29 | 武汉船用机械有限责任公司 | Plunger hydraulic oil cylinder of braker |
| CN101397850B (en) * | 2008-11-05 | 2011-09-28 | 三一重工股份有限公司 | Folding type arm support link mechanism and concrete pump vehicle by using the same |
| CN201420724Y (en) * | 2009-03-20 | 2010-03-10 | 山东隆源液压科技有限公司 | Oil cylinder of small arm of digger |
| CN201963635U (en) * | 2011-04-08 | 2011-09-07 | 中集车辆（集团）有限公司 | Piston oil cylinder and concrete pump with same |
| DE102011078780A1 (en) * | 2011-07-07 | 2013-01-10 | Putzmeister Engineering Gmbh | Distribution boom for concrete pumps |
| CN204213094U (en) * | 2014-10-21 | 2015-03-18 | 安徽星马专用汽车有限公司 | A kind of jib oil hydraulic cylinder and jib concrete pump truck |
-
2014
- 2014-10-21 CN CN201410562624.2A patent/CN104265730B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104265730A (en) | 2015-01-07 |
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