CN202879451U - Telescopic support leg and engineering machinery - Google Patents
Telescopic support leg and engineering machinery Download PDFInfo
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- CN202879451U CN202879451U CN 201220521863 CN201220521863U CN202879451U CN 202879451 U CN202879451 U CN 202879451U CN 201220521863 CN201220521863 CN 201220521863 CN 201220521863 U CN201220521863 U CN 201220521863U CN 202879451 U CN202879451 U CN 202879451U
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- reclaims
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Abstract
The utility model discloses a telescopic support leg and engineering machinery. The telescopic support leg comprises a first extending arm, a second extending arm, a linear drive component, a first extending pulley, and a first retracting pulley. The linear drive component comprises a fixed part and a movable part, the fixed part is fixed on a fixed rotating tower, and the first extending arm is connected with the movable part. The first extending pulley is arranged on the movable part, a first extending linear component moves around the first extending pulley, and two ends of the first extending linear component are connected with the fixed rotating tower and the second extending arm respectively. The first retracting pulley is arranged on the first extending arm, a first retracting linear component moves around the first retracting pulley, and two ends of the first retracting linear component are connected with the fixed rotating tower and the second extending arm respectively. According to the telescopic support leg, a plurality of extending arms are driven by one hydraulic oil cylinder, and the telescopic support leg has the advantages of being simple in structure, convenient to manufacture, stable in extending and retracting, high in reliability and the like, and solves the problem that the plurality of extending arms are not prone to driving.
Description
Technical field
The utility model relates generally to engineering machinery field, specifically, relates to a kind of telescopic leg, and the construction machinery and equipment that comprises this telescopic leg.
Background technology
The standing supporting leg that is equipped with on construction machinery and equipment such as concrete pump truck, the car hosit.When engineering machinery walking, supporting leg is regained; And when engineer machinery operation, supporting leg is opened, to stablize the car load center of gravity.At present, support leg for engineered machine adopts following two kinds of versions mostly: oscillating type and telescopic.
Take concrete pump truck as example, the telescopic boom of its telescopic leg adopts single oil cylinder or binding hydraulic oil cylinder driving usually, and along with the lengthening of pumping vehicle arm rack, a leg length increases thereupon.2 general joint telescopic boom supporting legs have not satisfied user demand, usually need to make 3 joints or 4 joint telescopic booms.
Present 3 joint telescopic booms mainly adopt sleeve oil cylinder or chain binding hydraulic oil cylinder driving, and 4 joint telescopic boom supporting legs not yet occur.Sleeve oil cylinder structure requirement on machining accuracy is high, manufacture difficulty is large, reliability is low; Chain binding oil cylinder then can only be applicable to 3 joint telescopic booms, and has the problems such as complex structure, chain drive power are little.
Along with the continuous increase of construction machinery and equipment unit scope of work, require the length of supporting leg increasing.Therefore, how to provide a kind of simple and reliable for structure, make simple telescopic leg, to satisfy the construction machinery and equipment performance requirement increasing to supporting leg, be the technical matters that those skilled in the art need to be resolved hurrily.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of telescopic leg, and this telescopic leg has reduced the complexity of cylinder structure greatly, has solved multi-stage telescopic arms and has driven difficult problem.
Telescopic leg of the present utility model, be included in the first extension arm of fore and aft motion in the fixing capstan head and in the first extension arm the second extension arm of fore and aft motion, and comprise:
The linear drives parts, described linear drives parts comprise fixed part and moving part, and described fixed part is fixed in fixedly on the capstan head, and described the first extension arm is connected with described moving part;
First launches pulley, described first launches pulley is arranged on the described moving part, first launches linear unit walks around described the first expansion pulley and is connected and fixed respectively capstan head and the second extension arm at two ends, and the two ends point of connection all is positioned at described first and launches the pulley rear;
First reclaims pulley, described first reclaims pulley is arranged on described the first extension arm, first reclaims linear unit walks around described the first recovery pulley and is connected and fixed respectively capstan head and the second extension arm at two ends, and the two ends point of connection all is positioned at described first and reclaims pulley the place ahead.
Further, also be included in the 3rd extension arm of fore and aft motion in described the second extension arm, and:
Second launches pulley, described second launches pulley is arranged on described the second extension arm, second launches linear unit walks around described the second expansion pulley and connects respectively the first extension arm and the 3rd extension arm at two ends, and the two ends point of connection all is positioned at described second and launches the pulley rear;
Second reclaims pulley, described second reclaims pulley is arranged on described the second extension arm, second reclaims linear unit walks around described the second recovery pulley and connects respectively the first extension arm and the 3rd extension arm at two ends, and the two ends point of connection all is positioned at described second and reclaims pulley the place ahead.
Further, also be included in the 4th extension arm of fore and aft motion in described the 3rd extension arm, and:
The 3rd launches pulley, the described the 3rd launches pulley is arranged on described the 3rd extension arm, the 3rd launches linear unit walks around described the 3rd expansion pulley and connects respectively the second extension arm and the 4th extension arm at two ends, and the two ends point of connection all is positioned at the described the 3rd and launches the pulley rear;
The 3rd reclaims pulley, the described the 3rd reclaims pulley is arranged on described the 3rd extension arm, the 3rd reclaims linear unit walks around described the 3rd recovery pulley and connects respectively the second extension arm and the 4th extension arm at two ends, and the two ends point of connection all is positioned at the described the 3rd and reclaims pulley the place ahead.
Further, also be included in the 5th extension arm of fore and aft motion in described the 4th extension arm, and:
The 4th launches pulley, the described the 4th launches pulley is arranged on described the 4th extension arm, the 4th launches linear unit walks around described the 4th expansion pulley and connects respectively the 3rd extension arm and the 5th extension arm at two ends, and the two ends point of connection all is positioned at the described the 4th and launches the pulley rear;
The 4th reclaims pulley, the described the 4th reclaims pulley is arranged on described the 4th extension arm, the 4th reclaims linear unit walks around described the 4th recovery pulley and connects respectively the 3rd extension arm and the 5th extension arm at two ends, and the two ends point of connection all is positioned at the described the 4th and reclaims pulley the place ahead.
Further, described linear drives parts are hydraulic ram, the piston rod of described hydraulic ram as fixed part, cylinder barrel as moving part.
Further, described first launch the termination that pulley is arranged at the cylinder barrel of described hydraulic ram.
Further, also be connected with support on the described moving part, rotating roller is installed on the described support, described roller is at the interior side roll of each extension arm.
Further, each reclaims the afterbody that pulley is arranged at corresponding extension arm.
Further, each each linear unit that launches on pulley and the recovery pulley is steel rope.
Another aspect of the present utility model also provides a kind of construction machinery and equipment, and this project machinery is provided with aforementioned each described telescopic leg.
The utility model at first drives the first extension arm by the linear drives parts and stretches out and retract, and launches pulley, reclaims pulley and linear unit and drive other and respectively save extension arm and stretch out and retract by each.More piece extension arm of the present utility model namely can be realized driving with a common hydraulic ram, and it is not only simple in structure, and low to requirement on machining accuracy, is easy to manufacture; In addition, the utility model can be realized the synchronization telescope of more piece extension arm, and its expanding-contracting action is steady, has more significant advantage for the above more piece extension arm supporting leg of three joints, has solved the more piece extension arm and has driven difficult problem.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the telescopic leg of the utility model one embodiment;
Fig. 2 is the structural representation of the telescopic leg of another embodiment of the utility model;
Fig. 3 is the telescopic leg of the utility model one embodiment launches pulley when retracting constitution diagram;
Fig. 4 is the telescopic leg of the utility model one embodiment reclaims pulley when retracting constitution diagram.
The specific embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment in the utility model can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Shown in Figure 1 is the structural representation of the telescopic leg of the utility model one embodiment, telescopic leg is two joint extension arm structures among this embodiment, is included in the first extension arm 21 of fixing capstan head 1 interior fore and aft motion and at the second extension arm 22 of the first extension arm 21 interior fore and aft motion.
Fixedly turntable can be the box-shaped stress members that is welded by high tensile steel plate, as the base of jib, turntable and swing type mechanism.When supporting leg stretched out and support ground, fixedly capstan head 1 bore the gravity of car load and the tilting moment of jib.In the process that supporting leg is retracted, each extension arm is incorporated in fixedly in the capstan head 1.
The actuating device of telescopic leg shown in Figure 1 comprises that linear drives parts 3, first launch pulley 41 and first and reclaim pulley 51.Wherein, linear drives parts 3 comprise fixed part 31 and moving part 32, and fixed part 31 is fixed in fixedly on the capstan head 1, and these linear drives parts 3 can be various machineries, electronic, hydraulic pressure or air pressure parts, and the utility model is not limited to this.Preferred these linear drives parts 3 are oil cylinder, and this oil cylinder can comprise cylinder barrel and piston rod.Need to prove, cylinder barrel both can be used as moving part 32, also can be used as fixed part 31.Preferred cylinder barrel is as moving part 32, and this moment, piston rod was as fixed part 31 and be articulated in fixedly on the capstan head 1.
The moving part 32 of linear drives parts 3 can move forward and backward with respect to fixing capstan head 1.Moving part 32 can be in the extension arm medial movement, can carry out relative sliding between itself and the extension arm.Preferably, the utility model also is connected with support 71 on the moving part 32 of linear drives parts 3, rotating roller 70 is installed on the support 71, and roller 70 is at the interior side roll of corresponding extension arm, and this roller 70 can reduce the friction between moving part 32 and the extension arm.
Can be provided with first and launch pulley 41 on this moving part 32, this first expansion pulley 41 is preferably disposed on the termination of the cylinder barrel of hydraulic ram, so that the space of linear unit is arranged.Should be understood that, first launches other position that pulley 41 also can be positioned at moving part 32.
The first expansion linear unit 61 is walked around first and is launched pulley 41 and be connected and fixed respectively capstan head 1 and the second extension arm 22 at two ends, and the two ends point of connection all is positioned at first and launches pulley 41 rears.Need to prove, the utility model indication forward and backward is with respect to the stretching out for the direction of telescopic boom, and the direction of stretching out (namely away from fixedly capstan head 1) is for after direction front, that retract is.In addition, in the embodiment shown in fig. 1, first launches linear unit 61 is located at the point of connection on the fixing capstan head 1 at the point of connection on the second extension arm 22 the place ahead.
The first expansion linear unit 61 can be the tension members of steel rope, iron chains and other structure or material, and the utility model is not limited to this.Preferred this tension members is steel rope.The first extension arm 21 is connected with moving part 32, moving part 32 stretch out and the process of retracting in, this moving part 32 drives first extension arm 21 and stretches out and retract.
On the basis of technique scheme, the principle of work of the utility model telescopic leg is as follows:
When supporting leg stretches out, the first extension arm 21 stretches out forward under the driving effect of linear drives parts 3, being arranged at the expansion of first on the moving part 32 pulley 41 moves ahead, the first expansion linear unit 61 pullings the second extension arm 22 that is located thereon stretches out forward, wherein the first extension arm 21 is when fixedly capstan head 1 extension elongation is L, the second extension arm 22 is 2L with respect to fixing capstan head 1 extension elongation, and namely this supporting leg integral body is stretched out 2L.
When supporting leg is retracted, the first extension arm 21 is retracted under the driving effect of linear drives parts 3 backward, be arranged at first on the first extension arm 21 and reclaim pulley 51 rear row, the first recovery linear unit 610 pullings the second extension arm 22 that is located thereon is retracted backward, wherein the first extension arm 21 is when fixedly capstan head 1 retraction length is L, the second extension arm 22 is 2L with respect to fixing capstan head 1 retraction length, i.e. the whole retraction 2L of this supporting leg.
Because each extension arm namely can be realized driving with a common hydraulic ram, for the sleeve oil cylinder and chain binding oil cylinder of prior art, it is not only simple in structure, and low to requirement on machining accuracy, is easy to manufacture.
As another embodiment of the present utility model, as shown in Figure 2, except launching pulley 41 and first, aforementioned the first extension arm 21, the second extension arm 22, linear drives parts 3, first reclaim the pulley 51, telescopic leg also is included in the 3rd extension arm 23 of the second extension arm 22 interior fore and aft motion, and second launches pulley 42 and the second recovery pulley 52.
For embodiment shown in Figure 2, the retraction of stretching out of its first extension arm 21, the second extension arm 22 is moved with embodiment illustrated in fig. 1 basic identical, and this paper does not repeat them here.For the 3rd extension arm 23, when supporting leg stretches out, be arranged at the expansion of second on the second extension arm 22 pulley 42 and move ahead, the second expansion linear unit 62 pullings the 3rd extension arm 23 that is located thereon stretches out forward; When supporting leg is retracted, be arranged at second on the second extension arm 22 and reclaim pulley 52 rear row, the second recovery linear unit 620 pullings the 3rd extension arm 23 that is located thereon is retracted.
Of the present utility model respectively saving between the extension arm can be carried out synchronization telescope, has more significant advantage with respect to the above more piece extension arm supporting leg of three joints, solved the more piece extension arm and driven difficult problem.
Further, the utility model can also be applicable to four joint extension arm supporting legs.On the basis of technique scheme, this four joints extension arm supporting leg also is included in the 4th extension arm of the 3rd extension arm 23 interior fore and aft motion, and the 3rd launches pulley and the 3rd recovery pulley.Wherein, the 3rd launches pulley is arranged on the 3rd extension arm 23, and the 3rd expansion linear unit is walked around the 3rd and launched pulley and connect respectively the second extension arm 22 and the 4th extension arm at two ends, and the two ends point of connection all is positioned at the 3rd and launches the pulley rear; The 3rd reclaims pulley is arranged on the 3rd extension arm 23, and the 3rd recovery linear unit is walked around the 3rd and reclaimed pulley and connect respectively the second extension arm 22 and the 4th extension arm at two ends, and the two ends point of connection all is positioned at the 3rd and reclaims pulley the place ahead.
The utility model also goes for five joint extension arm supporting legs.Correspondingly, also be included in the 5th extension arm of fore and aft motion in the 4th extension arm, and the 4th launches pulley and the 4th recovery pulley.Wherein, the 4th launches pulley is arranged on the 4th extension arm, and the 4th expansion linear unit is walked around the 4th and launched pulley and connect respectively the 3rd extension arm 23 and the 5th extension arm at two ends, and the two ends point of connection all is positioned at the 4th and launches the pulley rear; The 4th reclaims pulley is arranged on the 4th extension arm, and the 4th recovery linear unit is walked around the 4th and reclaimed pulley and connect respectively the 3rd extension arm 23 and the 5th extension arm at two ends, and the two ends point of connection all is positioned at the 4th and reclaims pulley the place ahead.
The stretch mode of the 4th extension arm and the 5th extension arm and aforementioned the 3rd extension arm 23 basic identical all finished by the pulling function of linear unit, can be with reference to above stated specification, and this paper does not repeat them here.Should be understood that to have the supporting leg of more piece extension arm structure more all within protection domain of the present utility model.
Except aforementioned telescopic leg, the utility model also provides a kind of construction machinery and equipment that is provided with aforementioned telescopic leg, and other structure of this project machinery is with reference to prior art, and this paper does not repeat them here.This project machinery can be the equipment that is provided with supporting leg such as concrete pump truck, car hosit etc.
In sum, the utility model at first drives the first extension arm 21 by linear drives parts 3 and stretches out and retract, and launches pulley and linear unit and drive other and respectively save extension arm and stretch out, reclaim pulley and linear unit and drive other and respectively save extension arm and retract by each by each.Compared with prior art, the utlity model has following advantage:
1) simple in structure, easily manufactured
More piece extension arm of the present utility model namely can be realized driving with a common hydraulic ram, and for the sleeve oil cylinder and chain binding oil cylinder of prior art, it is not only simple in structure, and low to requirement on machining accuracy, is easy to manufacture.
2) flexible steadily, reliability is high
The utility model launches pulley and reclaims pulley by each, can realize the synchronization telescope of more piece extension arm, and its expanding-contracting action is steady, and can be by the positioning action of oil cylinder, so that supporting leg has a plurality of different extension elongations; The utility model has more significant advantage for the above more piece extension arm supporting leg of three joints, has solved the more piece extension arm and has driven difficult problem, has advantages of also that simultaneously reliability is high.
Therefore, the beneficial effects of the utility model are apparent.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. telescopic leg, be included in first extension arm (21) of the fixing interior fore and aft motion of capstan head (1) and in the first extension arm (21) second extension arm (22) of fore and aft motion, it is characterized in that, also comprise:
Linear drives parts (3), described linear drives parts (3) comprise fixed part (31) and moving part (32), and described fixed part (31) is fixed in fixedly on the capstan head (1), and described the first extension arm (21) is connected with described moving part (32);
First launches pulley (41), described first launches pulley (41) is arranged on the described moving part (32), first launches linear unit (61) walks around described the first expansion pulley (41) and is connected and fixed respectively capstan head (1) and the second extension arm (22) at two ends, and the two ends point of connection all is positioned at described first and launches pulley (41) rear;
First reclaims pulley (51), described first reclaims pulley (51) is arranged on described the first extension arm (21), first reclaims linear unit (610) walks around described the first recovery pulley (51) and is connected and fixed respectively capstan head (1) and the second extension arm (22) at two ends, and the two ends point of connection all is positioned at described first and reclaims pulley (51) the place ahead.
2. telescopic leg according to claim 1 is characterized in that, also is included in the 3rd extension arm (23) of the interior fore and aft motion of described the second extension arm (22), and:
Second launches pulley (42), described second launches pulley (42) is arranged on described the second extension arm (22), second launches linear unit (62) walks around described the second expansion pulley (42) and connects respectively the first extension arm (21) and the 3rd extension arm (23) at two ends, and the two ends point of connection all is positioned at described second and launches pulley (42) rear;
Second reclaims pulley (52), described second reclaims pulley (52) is arranged on described the second extension arm (22), second reclaims linear unit (620) walks around described the second recovery pulley (52) and connects respectively the first extension arm (21) and the 3rd extension arm (23) at two ends, and the two ends point of connection all is positioned at described second and reclaims pulley (52) the place ahead.
3. telescopic leg according to claim 2 is characterized in that, also is included in the 4th extension arm of the interior fore and aft motion of described the 3rd extension arm (23), and:
The 3rd launches pulley, the described the 3rd launches pulley is arranged on described the 3rd extension arm (23), the 3rd launches linear unit walks around described the 3rd expansion pulley and connects respectively the second extension arm (22) and the 4th extension arm at two ends, and the two ends point of connection all is positioned at the described the 3rd and launches the pulley rear;
The 3rd reclaims pulley, the described the 3rd reclaims pulley is arranged on described the 3rd extension arm (23), the 3rd reclaims linear unit walks around described the 3rd recovery pulley and connects respectively the second extension arm (22) and the 4th extension arm at two ends, and the two ends point of connection all is positioned at the described the 3rd and reclaims pulley the place ahead.
4. telescopic leg according to claim 3 is characterized in that, also is included in the 5th extension arm of fore and aft motion in described the 4th extension arm, and:
The 4th launches pulley, the described the 4th launches pulley is arranged on described the 4th extension arm, the 4th launches linear unit walks around described the 4th expansion pulley and connects respectively the 3rd extension arm (23) and the 5th extension arm at two ends, and the two ends point of connection all is positioned at the described the 4th and launches the pulley rear;
The 4th reclaims pulley, the described the 4th reclaims pulley is arranged on described the 4th extension arm, the 4th reclaims linear unit walks around described the 4th recovery pulley and connects respectively the 3rd extension arm (23) and the 5th extension arm at two ends, and the two ends point of connection all is positioned at the described the 4th and reclaims pulley the place ahead.
5. each described telescopic leg is characterized in that according to claim 1-4, and described linear drives parts (3) are hydraulic ram, the piston rod of described hydraulic ram as fixed part (31), cylinder barrel as moving part (32).
6. telescopic leg according to claim 5 is characterized in that, described first launches the termination that pulley (41) is arranged at the cylinder barrel of described hydraulic ram.
7. each described telescopic leg according to claim 1-4, it is characterized in that, also be connected with support (71) on the described moving part (32), rotating roller (70) is installed on the described support (71), described roller (70) is at the interior side roll of corresponding extension arm.
8. each described telescopic leg is characterized in that according to claim 1-4, and each reclaims the afterbody that pulley is arranged at corresponding extension arm.
9. each described telescopic leg is characterized in that according to claim 1-4, and each each linear unit that launches on pulley and the recovery pulley is steel rope.
10. a construction machinery and equipment is characterized in that, described construction machinery and equipment is provided with each described telescopic leg of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220521863 CN202879451U (en) | 2012-10-12 | 2012-10-12 | Telescopic support leg and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220521863 CN202879451U (en) | 2012-10-12 | 2012-10-12 | Telescopic support leg and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202879451U true CN202879451U (en) | 2013-04-17 |
Family
ID=48070909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220521863 Expired - Lifetime CN202879451U (en) | 2012-10-12 | 2012-10-12 | Telescopic support leg and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202879451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103640557A (en) * | 2013-12-04 | 2014-03-19 | 中联重科股份有限公司 | Swing supporting leg mounting structure, control device, system, control method and engineering machinery |
-
2012
- 2012-10-12 CN CN 201220521863 patent/CN202879451U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103640557A (en) * | 2013-12-04 | 2014-03-19 | 中联重科股份有限公司 | Swing supporting leg mounting structure, control device, system, control method and engineering machinery |
| CN103640557B (en) * | 2013-12-04 | 2016-03-02 | 中联重科股份有限公司 | Swing supporting leg mounting structure, control device, system, control method and engineering machinery |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |
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| CX01 | Expiry of patent term |