CN2219284Y - Truck crane capable of sequentially telescoping telescopic gib arm - Google Patents
Truck crane capable of sequentially telescoping telescopic gib arm Download PDFInfo
- Publication number
- CN2219284Y CN2219284Y CN 95208172 CN95208172U CN2219284Y CN 2219284 Y CN2219284 Y CN 2219284Y CN 95208172 CN95208172 CN 95208172 CN 95208172 U CN95208172 U CN 95208172U CN 2219284 Y CN2219284 Y CN 2219284Y
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- telescopic oil
- telescopic
- valve
- loculus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a truck crane capable of sequentially telescoping a telescopic jib arm, solving the problem of sequentially telescoping a telescopic jib arm for truck cranes. The utility model comprises a hydraulic box, an oil pump, an oil filter, a change valve, an overflow valve, an oil supplement valve, a two-way balance valve and a telescopic oil cylinder. The telescopic oil cylinder comprises a first telescopic oil cylinder and a second telescopic oil cylinder. The big cavity of the first telescopic oil cylinder is communicated with the big cavity of the second telescopic oil cylinder, and the small cavity of the first telescopic oil cylinder is communicated with the small cavity of the second telescopic oil cylinder. The utility model is characterized in that a one-way backpressure valve is arranged at the site where the small cavities of the first and the second telescopic oil cylinders are communicated, and the areas of the small cavities of the first and second telescopic oil cylinders are the same.
Description
The utility model relates to lorry-mounted crane, refers to the lorry-mounted crane of the flexible telescopic boom of a kind of order especially.
Existing large-tonnage lorry-mounted crane in order to satisfy the requirement of big lifting amplitude, often contains multi-stage telescopic arms, and in the telescopic system that contains two joint hydraulic telescopic arms, how guaranteeing with a change-over valve that the order of telescopic boom is stretched becomes difficult point.Its solution is intended having: the one, with a change-over valve, rely on the area difference of two oil cylinders, the big cavity area of the oil cylinder of promptly stretching earlier than after stretch big, the area of the oil cylinder loculus that contracts earlier than after contract big, unless two area difference are bigger, otherwise assurance is flexible in proper order fully, phenomenon can occur touching, has increased the trouble of operation.The 2nd, control two oil cylinders respectively with the bigeminy change-over valve, this scheme has increased cost and weight, has also increased on the oil circuit and operational complexity.The 3rd, with a change-over valve, increase by a solenoid directional control valve again, open the action that electromagnetic valve carries out another oil cylinder after the Dong oil cylinder execution in the ban, this scheme also increases cost and complex structure.
The purpose of this utility model is to overcome the above-mentioned difficult point that existing lorry-mounted crane exists, and the lorry-mounted crane of the flexible telescopic boom of a kind of simple and reliable order is provided.
The purpose of this utility model is achieved in that the lorry-mounted crane of the flexible telescopic boom of order, comprise hydraulic reservoir, oil pump, oil filter, change-over valve, by pass valve adds Fill valve, bidirectional balanced valve and telescopic oil cylinder, telescopic oil cylinder has I, two of II, high pressure oil is through change-over valve, bidirectional balanced valve is supplied with telescopic oil cylinder I, big chamber or the loculus of II, the big chamber of telescopic oil cylinder I and the big chamber of telescopic oil cylinder II are connected, the loculus of the loculus of telescopic oil cylinder I and telescopic oil cylinder II is connected, and it is characterized in that: be provided with unidirectional back pressure valve at the loculus of telescopic oil cylinder I and the loculus connecting place of telescopic oil cylinder II; The little cavity area of telescopic oil cylinder I and the little cavity area of telescopic oil cylinder II equate.
Above-mentioned design plan can guarantee the flexible and easy operation of the order of telescopic oil cylinder, and weight, cost reduce.
Remake carefully below by drawings and Examples and to state.
Fig. 1, the utility model hydraulic scheme;
The flexible in proper order scheme drawing of Fig. 2, the utility model.
As shown in Figure 1: fuel tank, oil pump among the figure, comprise that elements such as back pressure valve are prior art.Omit.Here 1 is hydraulic reservoir, the 2nd, oil pump, and the 3rd, oil filter, the 4th, change-over valve, the 5th, by pass valve adds Fill valve, and the 6th, bidirectional balanced valve, the 7th, telescopic oil cylinder I, the 8th, telescopic oil cylinder II, the 9th, unidirectional back pressure valve.Its flexible in proper order principle and characteristics are seen Fig. 2, and wherein 10 are outer arm (also claiming folding arm II), and 11 is telescopic boom I, and 12 is telescopic boom II.If G1 is a telescopic boom I weight, G2 is a telescopic boom II weight, and W1 is the weight of telescoping cylinder I cylinder barrel, and W2 is that total weight, the W3 of telescoping cylinder II is telescoping cylinder II piston rod weight.Ignore friction, when stretching out: the thrust F1=G1+G2+W1+W2 of the thrust F2=G2+W3 of telescoping cylinder II, telescoping cylinder I, if loculus back pressure zero, it is flexible in proper order to want realization, then be necessary for F1/A1＜F2/A2, because of F1 much bigger than F2, make F1/A1＜F2/A2, A1 is more much bigger than A2 thus, now equate according to the little cavity area of telescopic oil cylinder I, II, big cavity area A1 and A2 are more or less the same, and increase a unidirectional back pressure valve at telescopic oil cylinder I, II loculus connecting place, and be flexible with the order that guarantees two oil cylinders.
The little cavity area of telescopic oil cylinder I, II all is A, the big cavity area of telescopic oil cylinder I is A1, the big cavity area of telescopic oil cylinder II is A2, do not consider that two oil cylinders are connected, separately under the consideration situation, P1 big and the big cavity pressure of telescoping cylinder I is big if the big cavity pressure of telescopic oil cylinder II is P2, and the P back of the body is the back pressure of telescopic oil cylinder II loculus.
Make P2 big＞P1 is big,
Increasing unidirectional back pressure valve 9, is can assurance to stretch out in proper order in order to satisfy this condition, and promptly telescopic oil cylinder 1 is stretched earlier.
During withdrawal: the big cavity pressure P that establishes telescopic oil cylinder I, II is the balance cock response pressure, and its pressure is higher, thus PA1＞＞G2+W2+G1+W1; PA2＞＞G2+W3
Do not consider that equally two oil cylinders are connected, establishing the little cavity pressure of telescopic oil cylinder I is that P1 and the little cavity pressure of telescopic oil cylinder II are P2
PA1＝G2＋W2＋G1＋W1＋P1A
PA2＝G2＋W3＋P2A
Since A1＞A2, PA1＞PA2, thus P1＞P2, thus withdrawing earlier of telescopic oil cylinder II guaranteed.
Its advantage is: 1, little cavity area equates, has fully guaranteed the operating mode of lorry-mounted crane, makes when the lift heavy thing, and the locking pressure of two telescoping cylinder loculuses equates.2, adopt telescoping cylinder II loculus to add back pressure, two big cavity area differences of oil cylinder are little, make integral structure coordinate, and arrange compact.
With 6.3 tons of lorry-mounted cranes is example: telescopic oil cylinder I, cylinder diameter and bar directly are φ 80/ φ 56mm; Telescopic oil cylinder II, cylinder diameter and bar directly are φ 70/ φ 40mm; If increase the 10bar back pressure at telescoping cylinder II loculus, then being equivalent to has 1/4 * π * and (φ 7.0
2-4.0
2) * 10=259 kgf acts on the telescoping cylinder II piston rod.The big cavity area of telescoping cylinder I: 50.26cm
2, little cavity area: 25.6cm
2, the big cavity area of telescoping cylinder II: 38.48cm
2, little cavity area: 25.9cm
2, G1 is 100kg in addition, and G2 is 72kg, and W1 is 35kg, and W2 is 70kg, W3 is 30kg.
Claims (1)
1, the lorry-mounted crane of the flexible telescopic boom of order, comprise that hydraulic reservoir, oil pump, oil filter, change-over valve, by pass valve add Fill valve, bidirectional balanced valve and telescopic oil cylinder, telescopic oil cylinder has two of I, II, high pressure oil is supplied with big chamber or the loculus of telescopic oil cylinder I, II through change-over valve, bidirectional balanced valve, the big chamber of telescopic oil cylinder I and the big chamber of telescopic oil cylinder II are connected, the loculus of the loculus of telescopic oil cylinder I and telescopic oil cylinder II is connected, and it is characterized in that: be provided with unidirectional back pressure valve at the loculus of telescopic oil cylinder I and the loculus connecting place of telescopic oil cylinder II; The little cavity area of telescopic oil cylinder I and the little cavity area of telescopic oil cylinder II equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95208172 CN2219284Y (en) | 1995-04-17 | 1995-04-17 | Truck crane capable of sequentially telescoping telescopic gib arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95208172 CN2219284Y (en) | 1995-04-17 | 1995-04-17 | Truck crane capable of sequentially telescoping telescopic gib arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2219284Y true CN2219284Y (en) | 1996-02-07 |
Family
ID=33859569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95208172 Expired - Lifetime CN2219284Y (en) | 1995-04-17 | 1995-04-17 | Truck crane capable of sequentially telescoping telescopic gib arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2219284Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102085851A (en) * | 2011-01-13 | 2011-06-08 | 长沙中联重工科技发展股份有限公司 | Multistage telescoping mechanism sequence control device and engineering equipment applying same |
| CN102134044A (en) * | 2010-12-20 | 2011-07-27 | 长治清华机械厂 | Suspension arm sequential stretching/retracting hydraulic system |
| CN102135118A (en) * | 2011-04-17 | 2011-07-27 | 常德中联重科液压有限公司 | Hydraulic control component and control circuit with same |
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
-
1995
- 1995-04-17 CN CN 95208172 patent/CN2219284Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134044A (en) * | 2010-12-20 | 2011-07-27 | 长治清华机械厂 | Suspension arm sequential stretching/retracting hydraulic system |
| CN102085851A (en) * | 2011-01-13 | 2011-06-08 | 长沙中联重工科技发展股份有限公司 | Multistage telescoping mechanism sequence control device and engineering equipment applying same |
| CN102085851B (en) * | 2011-01-13 | 2013-06-05 | 中联重科股份有限公司 | Multistage telescoping mechanism sequence control device and engineering equipment applying same |
| CN102135118A (en) * | 2011-04-17 | 2011-07-27 | 常德中联重科液压有限公司 | Hydraulic control component and control circuit with same |
| CN102135118B (en) * | 2011-04-17 | 2013-11-13 | 常德中联重科液压有限公司 | Hydraulic control component and control circuit with same |
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
| CN103423221B (en) * | 2013-07-24 | 2015-10-28 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: SANSE ILLUMINATING CORP., ANHUI PROV. TO: ANHUI PROVINCE ANSE ILLUMI NATION CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Sanse Lighting Co Ltd, Anhui Prov. Patentee before: Anhui Three-Colour Lighting Corp. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |