CN201999660U - Telescopic hydraulic mechanism of crane jib - Google Patents
Telescopic hydraulic mechanism of crane jib Download PDFInfo
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- CN201999660U CN201999660U CN2010206811924U CN201020681192U CN201999660U CN 201999660 U CN201999660 U CN 201999660U CN 2010206811924 U CN2010206811924 U CN 2010206811924U CN 201020681192 U CN201020681192 U CN 201020681192U CN 201999660 U CN201999660 U CN 201999660U
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Abstract
The utility model relates to a telescopic hydraulic mechanism of a crane jib, which belongs to the technical field of telescopic cantilever cranes. The telescopic hydraulic mechanism of the crane jib is provided for solving the technical problems, not only has no influence to the contour dimension, but also is reliable to sequentially stretch. The adopted technical scheme is that: a primary change valve is installed at the end part of a first piston rod in a primary telescopic cylinder, and a secondary change valve is installed at the end part of a second piston rod in a secondary telescopic cylinder; and the oil channel port A3 of the primary telescopic cylinder is connected with the oil channel port A4 of the secondary telescopic cylinder through an oil pipe, the oil channel port A7 of the secondary telescopic cylinder is connected with the oil channel port A8 of a third telescopic cylinder through the oil pipe, the oil channel port B2 of the primary telescopic cylinder is connected with the oil channel port B3 of the secondary telescopic cylinder through the oil pipe, and the oil channel port B5 of the secondary telescopic cylinder is connected with the oil channel port B6 of the third telescopic cylinder through the oil pipe. The telescopic hydraulic mechanism of the crane jib is applicable to the sequent stretching of the telescopic cantilevers of lorry-mounted cranes and automobile cranes.
Description
Technical field
The hydraulic gear of the utility model hoisting arm expansion belongs to the telescopic jib technical field, and the order that is specially adapted to lorry-mounted crane or car hosit telescopic jib is flexible.
Background technology
The order of lorry-mounted crane arm is flexible to be meant that respectively saving telescopic boom finishes expanding-contracting action by certain flexible order, for the load-carrying ability after respectively saving telescopic boom and stretching out and the lifting characteristic of hoisting crane are adapted, semi-girder is generally outside in proper order, arm order of contracting and semi-girder reversed in order, from inside outwards promptly.At present, the flexible in proper order method of lorry-mounted crane arm realization mainly contains two kinds, a kind ofly need add one section hydraulic hose on arm, and this will increase hose reel or flexible pipe is led chain, has promptly influenced the oad that increases complete machine structure again attractive in appearance of arm like this; Second kind is to come the control oil channel break-make by the sequence of erection valve, thus realized flexible in proper order, but if the telescopic boom joint number more than 3 joints, relies on the flexible reliability of order of this method to descend.
The utility model content
The utility model overcomes the deficiencies in the prior art, and technical matters to be solved does not promptly influence oad for providing a kind of, and makes the hydraulic gear of the flexible failure-free hoisting arm expansion of order.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: the hydraulic gear of hoisting arm expansion, comprise one-level telescoping cylinder, secondary telescoping cylinder, three grades of telescoping cylinders, one-level change-over valve, secondary change-over valve, first check valve, second check valve, the 3rd check valve and the 4th check valves, the one-level change-over valve is installed in the end of first piston bar in the one-level telescoping cylinder, and the secondary change-over valve is installed in the end of second piston rod in the secondary telescoping cylinder;
The structure of described one-level telescoping cylinder is: the first piston bar is sleeved in the cylinder barrel of one-level telescoping cylinder, the first piston bar is hollow, the flexible oil duct of one-level is positioned at described cylinder barrel inside, flexible oil duct one end of one-level is fixed on the cylinder barrel bottom, and the flexible oil duct other end of one-level is sleeved in the first piston bar in-to-in cavity; One end of first piston bar internal cavities and external communications is oil duct junction A3, have three oil ducts on the first piston bar, article one, oil duct is with the rodless cavity and the external communications of one-level telescoping cylinder, its oil duct junction that is positioned at rodless cavity one end is oil duct junction A1, and another is connected with the one-level change-over valve that is installed in the first piston boom end with the oil duct junction of external communications; The second oil duct is communicated with described one-level change-over valve with first piston bar in-to-in cavity, its oil duct junction that is positioned at first piston bar internal cavities place is oil duct junction A2; Article three, oil duct is with the rod chamber and the external communications of one-level telescoping cylinder, and its oil duct junction that is positioned at rod chamber one end is oil duct junction B1, and the oil duct junction of another and external communications is oil duct junction B2;
The structure of described secondary telescoping cylinder is identical with the structure of described one-level telescoping cylinder, second piston rod is sleeved in the cylinder barrel of secondary telescoping cylinder, second piston rod is hollow, the flexible oil duct of secondary is positioned at described cylinder barrel inside, flexible oil duct one end of secondary is fixed on the cylinder barrel bottom, and the flexible oil duct other end of secondary is sleeved in the second piston rod in-to-in cavity; One end of the second piston rod internal cavities and external communications is oil duct junction A7, have three oil ducts on second piston rod, article one, oil duct is with the rodless cavity and the external communications of secondary telescoping cylinder, its oil duct junction that is positioned at rodless cavity one end is oil duct junction A5, and another is connected with the secondary change-over valve that is installed in second piston rod end with the oil duct junction of external communications; The second oil duct is communicated with described secondary change-over valve with the second piston rod in-to-in cavity, its oil duct junction that is positioned at the second piston rod internal cavities place is oil duct junction A6; Article three, oil duct is with the rod chamber and the external communications of secondary telescoping cylinder, and its oil duct junction that is positioned at rod chamber one end is oil duct junction B4, and the oil duct junction of another and external communications is oil duct junction B5;
The structure of described three grades of telescoping cylinders is: the 3rd piston rod is sleeved in the cylinder barrel of three grades of telescoping cylinders, and the oil duct junction of three grades of telescoping cylinder rodless cavity one ends is oil duct junction A8, and the oil duct junction of three grades of telescoping cylinder rod chamber one ends is oil duct junction B6;
The oil duct junction of described one-level telescoping cylinder rod chamber one end is oil duct junction B, the oil duct junction of one-level telescoping cylinder rodless cavity one end is oil duct junction A, be connected with first check valve and two check valves of second check valve between oil duct junction A and the one-level telescoping cylinder rodless cavity, first check valve and second check valve also connect, oil duct junction A is communicated with the rodless cavity of one-level telescoping cylinder by first check valve, and oil duct junction A is by second check valve and the flexible oil duct internal communication of described one-level;
The oil duct junction of described secondary telescoping cylinder rod chamber one end is oil duct junction B3, the oil duct junction of secondary telescoping cylinder rodless cavity one end is oil duct junction A4, be connected with the 3rd check valve and two check valves of the 4th check valve between oil duct junction A4 and the secondary telescoping cylinder rodless cavity, the 3rd check valve and the 4th check valve also connect, oil duct junction A4 is communicated with the rodless cavity of secondary telescoping cylinder by the 3rd check valve, and oil duct junction A4 is by the 4th check valve and the flexible oil duct internal communication of described secondary;
The oil duct junction A3 of described one-level telescoping cylinder is connected by oil pipe with the oil duct junction A4 of secondary telescoping cylinder, the oil duct junction A7 of secondary telescoping cylinder is connected by oil pipe with the oil duct junction A8 of three grades of telescoping cylinders, the oil duct junction B2 of one-level telescoping cylinder is connected by oil pipe with the oil duct junction B3 of secondary telescoping cylinder, and the oil duct junction B5 of secondary telescoping cylinder is connected by oil pipe with the oil duct junction B6 of three grades of telescoping cylinders.
The opening ways of described one-level change-over valve and secondary change-over valve has two kinds: a kind of is to open through mechanical collision, and a kind of is that oil pressure is opened when reaching the response pressure value that change-over valve sets; The end of described second piston rod is connected with first collision block, described the 3rd piston rod end is connected with second collision block, described one-level change-over valve is provided with the one-level travel switch, described secondary change-over valve is provided with the secondary travel switch, the one-level travel switch is corresponding with the position of first collision block, and the secondary travel switch is corresponding with the position of second collision block.
The beneficial effect that the hydraulic gear of the utility model hoisting arm expansion is compared with prior art had is:
1, the utility model has used change-over valve that two kinds of open methods are arranged and special oil circuit, makes that the order of arm is flexible not only reliable, and does not influence the oad of complete machine.
2, the utility model has been used by pass valve and compression indicator, and compression indicator can demonstrate the application of force size of each oil cylinder and the torque of HM Hydraulic Motor, by by pass valve, can control each oil cylinder and HM Hydraulic Motor and reach desirable mode of operation.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1 for the one-level telescoping cylinder, 2 for secondary telescoping cylinder, 3 be three grades of telescoping cylinders, 4 be first check valve, 5 be second check valve, 6 for the flexible oil duct of one-level, 7 for the one-level change-over valve, 8 for one-level travel switch, 9 be first collision block, 10 be the 3rd check valve, 11 be the 4th check valve, 12 for the flexible oil duct of secondary, 13 for secondary change-over valve, 14 be that secondary travel switch, 15 is that second collision block, 16 is that first piston bar, 17 is that second piston rod, 18 is the 3rd piston rod.
The specific embodiment
As shown in Figure 1, a kind of hydraulic gear of hoisting arm expansion, comprise one-level telescoping cylinder 1, secondary telescoping cylinder 2, three grades of telescoping cylinders 3, one-level change-over valve 7, secondary change-over valve 13, first check valve 4, second check valve 5, the 3rd check valve 10 and the 4th check valves 11, one-level change-over valve 7 is installed in the end of first piston bar 16 in the one-level telescoping cylinder 1, and secondary change-over valve 13 is installed in the end of second piston rod 17 in the secondary telescoping cylinder 2;
The structure of described one-level telescoping cylinder 1 is: first piston bar 16 is sleeved in the cylinder barrel of one-level telescoping cylinder 1, first piston bar 16 is hollow, the flexible oil duct 6 of one-level is positioned at described cylinder barrel inside, flexible oil duct 6 one ends of one-level are fixed on the cylinder barrel bottom, and flexible oil duct 6 other ends of one-level are sleeved in the first piston bar 16 in-to-in cavitys; One end of first piston bar 16 internal cavities and external communications is oil duct junction A3, have three oil ducts on the first piston bar 16, article one, oil duct is with the rodless cavity and the external communications of one-level telescoping cylinder 1, its oil duct junction that is positioned at rodless cavity one end is oil duct junction A1, and another is connected with the one-level change-over valve 7 that is installed in first piston bar 16 ends with the oil duct junction of external communications; The second oil duct is communicated with described one-level change-over valve 7 with first piston bar 16 in-to-in cavitys, its oil duct junction that is positioned at first piston bar 16 internal cavities places is oil duct junction A2; Article three, oil duct is with the rod chamber and the external communications of one-level telescoping cylinder 1, and its oil duct junction that is positioned at rod chamber one end is oil duct junction B1, and the oil duct junction of another and external communications is oil duct junction B2;
The structure of described secondary telescoping cylinder 2 is identical with the structure of described one-level telescoping cylinder 1, second piston rod 17 is sleeved in the cylinder barrel of secondary telescoping cylinder 2, second piston rod 17 is hollow, the flexible oil duct 12 of secondary is positioned at described cylinder barrel inside, flexible oil duct 12 1 ends of secondary are fixed on the cylinder barrel bottom, and flexible oil duct 12 other ends of secondary are sleeved in second piston rod, the 17 in-to-in cavitys; One end of second piston rod, 17 internal cavities and external communications is oil duct junction A7, have three oil ducts on second piston rod 17, article one, oil duct is with the rodless cavity and the external communications of secondary telescoping cylinder 2, its oil duct junction that is positioned at rodless cavity one end is oil duct junction A5, and another is connected with the secondary change-over valve 13 that is installed in second piston rod, 17 ends with the oil duct junction of external communications; The second oil duct is communicated with described secondary change-over valve 13 with second piston rod, 17 in-to-in cavitys, its oil duct junction that is positioned at second piston rod, 17 internal cavities places is oil duct junction A6; Article three, oil duct is with the rod chamber and the external communications of secondary telescoping cylinder 2, and its oil duct junction that is positioned at rod chamber one end is oil duct junction B4, and the oil duct junction of another and external communications is oil duct junction B5;
The structure of described three grades of telescoping cylinders 3 is: the 3rd piston rod 18 is sleeved in the cylinder barrel of three grades of telescoping cylinders 3, and the oil duct junction of three grades of telescoping cylinder 3 rodless cavities one ends is oil duct junction A8, and the oil duct junction of three grades of telescoping cylinder 3 rod chambers one ends is oil duct junction B6;
The oil duct junction of described one-level telescoping cylinder 1 rod chamber one end is oil duct junction B, the oil duct junction of one-level telescoping cylinder 1 rodless cavity one end is oil duct junction A, be connected with first check valve 4 and 5 two check valves of second check valve between oil duct junction A and one-level telescoping cylinder 1 rodless cavity, first check valve 4 and second check valve 5 also connect, oil duct junction A is communicated with the rodless cavity of one-level telescoping cylinder 1 by first check valve 4, and oil duct junction A is by flexible oil duct 6 internal communication of second check valve 5 and described one-level;
The oil duct junction of described secondary telescoping cylinder 2 rod chambers one end is oil duct junction B3, the oil duct junction of secondary telescoping cylinder 2 rodless cavities one end is oil duct junction A4, be connected with the 3rd check valve 10 and 11 two check valves of the 4th check valve between oil duct junction A4 and secondary telescoping cylinder 2 rodless cavities, the 3rd check valve 10 and the 4th check valve 11 also connect, oil duct junction A4 is communicated with the rodless cavity of secondary telescoping cylinder 2 by the 3rd check valve 10, and oil duct junction A4 is by flexible oil duct 12 internal communication of the 4th check valve 11 and described secondary;
The oil duct junction A3 of described one-level telescoping cylinder 1 is connected by oil pipe with the oil duct junction A4 of secondary telescoping cylinder 2, the oil duct junction A7 of secondary telescoping cylinder 2 is connected by oil pipe with the oil duct junction A8 of three grades of telescoping cylinders 3, the oil duct junction B2 of one-level telescoping cylinder 1 is connected by oil pipe with the oil duct junction B3 of secondary telescoping cylinder 2, and the oil duct junction B5 of secondary telescoping cylinder 2 is connected by oil pipe with the oil duct junction B6 of three grades of telescoping cylinders 3.
The opening ways of described one-level change-over valve 7 and secondary change-over valve 13 has two kinds: a kind of is to open through mechanical collision, and a kind of is that oil pressure is opened when reaching the response pressure value that change-over valve sets; The end of described second piston rod 17 is connected with first collision block 9, described the 3rd piston rod 18 ends are connected with second collision block 15, described one-level change-over valve 7 is provided with one-level travel switch 8, described secondary change-over valve 13 is provided with secondary travel switch 14, one-level travel switch 8 is corresponding with the position of first collision block 9, and secondary travel switch 14 is corresponding with the position of second collision block 15.
The working process of the hydraulic gear of the utility model hoisting arm expansion is as follows:
During semi-girder, oil duct junction A oil-feed, pressure oil enters the rodless cavity of one-level telescoping cylinder 1 through first check valve 4, and first piston bar 16 stretches out, and oil return is back to fuel tank through oil duct junction B; First piston bar 16 stretches out the back that puts in place still to carry out as if oil-feed, oil pressure will constantly raise, one-level change-over valve 7 is opened when oil pressure is elevated to the response pressure value of one-level change-over valve 7 settings, pressure oil enters the rodless cavity of secondary telescoping cylinder 2 through oil duct junction A1, one-level change-over valve 7, oil duct junction A2, oil duct junction A3, oil duct junction A4, the 3rd check valve 10, second piston rod 17 stretches out, and oil return is back to fuel tank through oil duct junction B3, oil duct junction B2, oil duct junction B1, oil duct junction B; Second piston rod 17 stretches out the back that puts in place still to carry out as if oil-feed, oil pressure will constantly raise, secondary change-over valve 13 is opened when oil pressure is elevated to the response pressure value of secondary change-over valve 13 settings, pressure oil enters the rodless cavity of three grades of telescoping cylinders 3 through oil duct junction A5, secondary change-over valve 13, oil duct junction A6, oil duct junction A7, oil duct junction A8, the 3rd piston rod 18 stretches out, and oil return is back to fuel tank through oil duct junction B6, oil duct junction B5, oil duct junction B4, oil duct junction B3, oil duct junction B2, oil duct junction B1, oil duct junction B; One, two, three telescoping cylinder stretches out successively like this, and drive respectively saves telescopic boom and stretches out successively, has just finished in proper order and has stretched.
When contracting arm, oil duct junction B oil-feed, pressure oil is through oil duct junction B1, oil duct junction B2, oil duct junction B3, oil duct junction B4, oil duct junction B5, oil duct junction B6 enters the rod chamber of three grades of telescoping cylinders 3, oil return is through oil duct junction A8, oil duct junction A7, the secondary oil duct 12 that stretches, the 4th check valve 11, oil duct junction A4, oil duct junction A3, the one-level oil duct 6 that stretches, second check valve 5, oil duct junction A flows back to fuel tank, the 3rd piston rod 18 bounces back under the effect of pressure oil, second collision block 15 contacted with secondary travel switch 14 after retraction put in place, secondary change-over valve 13 is connected, pressure oil is through oil duct junction B, oil duct junction B1, oil duct junction B2, oil duct junction B3 enters the rod chamber of secondary telescoping cylinder 2, oil return is through oil duct junction A5, secondary change-over valve 13, oil duct junction A6, the secondary oil duct 12 that stretches, the 4th check valve 11, oil duct junction A4, oil duct junction A3, the one-level oil duct 6 that stretches, second check valve 5, oil duct junction A flows back to fuel tank, second piston rod 17 bounces back under the effect of pressure oil, first collision block 9 contacted with one-level travel switch 8 after retraction put in place, one-level change-over valve 7 is connected, pressure oil enters the rod chamber of one-level telescoping cylinder 1 through oil duct junction B, oil return is through oil duct junction A1, one-level change-over valve 7, oil duct junction A2, the one-level oil duct 6 that stretches, second check valve 5, oil duct junction A flows back to fuel tank, first piston bar 16 bounces back under the effect of pressure oil, till retraction puts in place; Such three, two, one-level telescoping cylinder is withdrawn successively, drives respectively to save telescopic boom and withdraw successively, has just finished in proper order and has contracted.
Claims (2)
1. the hydraulic gear of hoisting arm expansion, comprise one-level telescoping cylinder (1), secondary telescoping cylinder (2), three grades of telescoping cylinders (3), one-level change-over valve (7), secondary change-over valve (13), first check valve (4), second check valve (5), the 3rd check valve (10) and the 4th check valve (11), it is characterized in that: one-level change-over valve (7) is installed in the end of first piston bar (16) in the one-level telescoping cylinder (1), and secondary change-over valve (13) is installed in the end of second piston rod (17) in the secondary telescoping cylinder (2);
The structure of described one-level telescoping cylinder (1) is: first piston bar (16) is sleeved in the cylinder barrel of one-level telescoping cylinder (1), first piston bar (16) is hollow, the one-level oil duct (6) that stretches is positioned at described cylinder barrel inside, one-level oil duct (6) one ends that stretch are fixed on cylinder barrel bottom, and one-level oil duct (6) other end that stretches is sleeved in first piston bar (16) the in-to-in cavity; One end of first piston bar (16) internal cavities and external communications is oil duct junction A3, have three oil ducts on the first piston bar (16), article one, oil duct is with the rodless cavity and the external communications of one-level telescoping cylinder (1), its oil duct junction that is positioned at rodless cavity one end is oil duct junction A1, and another is connected with the one-level change-over valve (7) that is installed in first piston bar (16) end with the oil duct junction of external communications; The second oil duct is communicated with described one-level change-over valve (7) with first piston bar (16) in-to-in cavity, its oil duct junction that is positioned at first piston bar (16) internal cavities place is oil duct junction A2; Article three, oil duct is with the rod chamber and the external communications of one-level telescoping cylinder (1), and its oil duct junction that is positioned at rod chamber one end is oil duct junction B1, and the oil duct junction of another and external communications is oil duct junction B2;
The structure of described secondary telescoping cylinder (2) is identical with the structure of described one-level telescoping cylinder (1), second piston rod (17) is sleeved in the cylinder barrel of secondary telescoping cylinder (2), second piston rod (17) is hollow, the secondary oil duct (12) that stretches is positioned at described cylinder barrel inside, secondary oil duct (12) one ends that stretch are fixed on cylinder barrel bottom, and secondary oil duct (12) other end that stretches is sleeved in second piston rod (17) the in-to-in cavity; One end of second piston rod (17) internal cavities and external communications is oil duct junction A7, have three oil ducts on second piston rod (17), article one, oil duct is with the rodless cavity and the external communications of secondary telescoping cylinder (2), its oil duct junction that is positioned at rodless cavity one end is oil duct junction A5, and another is connected with the secondary change-over valve (13) that is installed in second piston rod (17) end with the oil duct junction of external communications; The second oil duct is communicated with described secondary change-over valve (13) with second piston rod (17) in-to-in cavity, its oil duct junction that is positioned at second piston rod (17) internal cavities place is oil duct junction A6; Article three, oil duct is with the rod chamber and the external communications of secondary telescoping cylinder (2), and its oil duct junction that is positioned at rod chamber one end is oil duct junction B4, and the oil duct junction of another and external communications is oil duct junction B5;
The structure of described three grades of telescoping cylinders (3) is: the 3rd piston rod (18) is sleeved in the cylinder barrel of three grades of telescoping cylinders (3), and the oil duct junction of three grades of telescoping cylinders (3) rodless cavity, one end is oil duct junction A8, and the oil duct junction of three grades of telescoping cylinders (3) rod chamber, one end is oil duct junction B6;
The oil duct junction of described one-level telescoping cylinder (1) rod chamber one end is oil duct junction B, the oil duct junction of one-level telescoping cylinder (1) rodless cavity one end is oil duct junction A, be connected with first check valve (4) and (5) two check valves of second check valve between oil duct junction A and one-level telescoping cylinder (1) rodless cavity, first check valve (4) and second check valve (5) also connect, oil duct junction A is communicated with the rodless cavity of one-level telescoping cylinder (1) by first check valve (4), and oil duct junction A is by flexible oil duct (6) internal communication of second check valve (5) and described one-level;
The oil duct junction of described secondary telescoping cylinder (2) rod chamber one end is oil duct junction B3, the oil duct junction of secondary telescoping cylinder (2) rodless cavity one end is oil duct junction A4, be connected with the 3rd check valve (10) and (11) two check valves of the 4th check valve between oil duct junction A4 and secondary telescoping cylinder (2) rodless cavity, the 3rd check valve (10) and the 4th check valve (11) also connect, oil duct junction A4 is communicated with the rodless cavity of secondary telescoping cylinder (2) by the 3rd check valve (10), and oil duct junction A4 is by flexible oil duct (12) internal communication of the 4th check valve (11) and described secondary;
The oil duct junction A3 of described one-level telescoping cylinder (1) is connected by oil pipe with the oil duct junction A4 of secondary telescoping cylinder (2), the oil duct junction A7 of secondary telescoping cylinder (2) is connected by oil pipe with the oil duct junction A8 of three grades of telescoping cylinders (3), the oil duct junction B2 of one-level telescoping cylinder (1) is connected by oil pipe with the oil duct junction B3 of secondary telescoping cylinder (2), and the oil duct junction B5 of secondary telescoping cylinder (2) is connected by oil pipe with the oil duct junction B6 of three grades of telescoping cylinders (3).
2. the hydraulic gear of hoisting arm expansion according to claim 1, it is characterized in that: the end of described second piston rod (17) is connected with first collision block (9), described the 3rd piston rod (18) end is connected with second collision block (15), described one-level change-over valve (7) is provided with one-level travel switch (8), described secondary change-over valve (13) is provided with secondary travel switch (14), one-level travel switch (8) is corresponding with the position of first collision block (9), and secondary travel switch (14) is corresponding with the position of second collision block (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206811924U CN201999660U (en) | 2010-12-20 | 2010-12-20 | Telescopic hydraulic mechanism of crane jib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206811924U CN201999660U (en) | 2010-12-20 | 2010-12-20 | Telescopic hydraulic mechanism of crane jib |
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| Publication Number | Publication Date |
|---|---|
| CN201999660U true CN201999660U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206811924U Expired - Lifetime CN201999660U (en) | 2010-12-20 | 2010-12-20 | Telescopic hydraulic mechanism of crane jib |
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| Country | Link |
|---|---|
| CN (1) | CN201999660U (en) |
Cited By (6)
| 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 |
| CN102838042A (en) * | 2012-09-12 | 2012-12-26 | 三一重工股份有限公司 | Crane and double-telescopic-cylinder independent control hydraulic system thereof |
| CN104477795A (en) * | 2015-01-13 | 2015-04-01 | 中船华南船舶机械有限公司 | Multi-stage oil cylinder telescopic device and method for installing multi-state oil cylinder telescopic device on telescopic crane |
| CN105605022A (en) * | 2016-03-14 | 2016-05-25 | 三一帕尔菲格特种车辆装备有限公司 | Multi-oil-cylinder sequential telescopic mechanism and engineering machine |
| 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 |
| CN113236618A (en) * | 2021-05-11 | 2021-08-10 | 燕山大学 | Multi-cylinder sequential telescopic hydraulic system |
-
2010
- 2010-12-20 CN CN2010206811924U patent/CN201999660U/en not_active Expired - Lifetime
Cited By (8)
| 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 |
| CN102838042A (en) * | 2012-09-12 | 2012-12-26 | 三一重工股份有限公司 | Crane and double-telescopic-cylinder independent control hydraulic system thereof |
| CN102838042B (en) * | 2012-09-12 | 2014-11-19 | 三一重工股份有限公司 | Crane and double-telescopic-cylinder independent control hydraulic system thereof |
| CN104477795A (en) * | 2015-01-13 | 2015-04-01 | 中船华南船舶机械有限公司 | Multi-stage oil cylinder telescopic device and method for installing multi-state oil cylinder telescopic device on telescopic crane |
| CN105605022A (en) * | 2016-03-14 | 2016-05-25 | 三一帕尔菲格特种车辆装备有限公司 | Multi-oil-cylinder sequential telescopic mechanism and engineering machine |
| CN105605022B (en) * | 2016-03-14 | 2018-06-12 | 三一帕尔菲格特种车辆装备有限公司 | A kind of Multi-cylinder sequential telescopic mechanism and engineering machinery |
| 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 |
| CN113236618A (en) * | 2021-05-11 | 2021-08-10 | 燕山大学 | Multi-cylinder sequential telescopic hydraulic system |
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