CN216471925U - Double-end driven horizontal multi-stage telescopic boom - Google Patents
Double-end driven horizontal multi-stage telescopic boom Download PDFInfo
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- CN216471925U CN216471925U CN202122804102.7U CN202122804102U CN216471925U CN 216471925 U CN216471925 U CN 216471925U CN 202122804102 U CN202122804102 U CN 202122804102U CN 216471925 U CN216471925 U CN 216471925U
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Abstract
A double-end driven horizontal multi-stage telescopic boom is sequentially sleeved with a first sleeve boom and a second sleeve boom … the nth sleeve boom from outside to inside, wherein n is more than or equal to 3; a linkage mechanism is arranged between the adjacent sleeve arms; the linkage mechanism comprises a fixed joint A, a fixed joint B, a guide wheel A and an extending flexible piece; the fixed contact A is arranged at the front end of the kth-2 sleeve arm; the guide wheel A is arranged at the front end of the kth sleeve arm-1; the fixed contact B is arranged at the rear end of the kth sleeve arm, and k is more than or equal to 3 and less than or equal to n; in the linkage mechanism, one end of the flexible piece extending out is fixedly connected with a fixed connection point A, and the other end of the flexible piece is fixedly connected with a fixed connection point B after being wound around a guide wheel A; the first sleeve arm is a fixed sleeve arm; the second set of arms is connected with an overhanging driving part; the nth sleeve arm is connected with a retraction driving part; the retraction driving part adopts a flexible structure; the telescopic arm is extended through the extension driving part, the telescopic arm is retracted through the retraction driving part, and the structure is simplified through the linkage mechanism; no matter how many telescopic booms are, the telescopic boom can be stretched out and drawn back only by two powers.
Description
Technical Field
The invention relates to the technical field of multistage telescopic booms, in particular to a horizontal multistage telescopic boom driven by two ends.
Background
The multi-stage telescopic arm is a common linear telescopic part and mainly comprises a fixed sleeve part and a plurality of movable sleeve parts; the movable sleeve piece and the fixed sleeve piece are mutually sleeved; the fixed sleeve piece is arranged on the outer side, and the movable sleeve piece is arranged on the inner side; the movable sleeve piece and the fixed sleeve piece slide mutually to control the position of the movable sleeve piece so as to realize the purpose of stretching the telescopic arm; generally, a fixed set of the telescopic boom is named as a first-stage telescopic boom, and each movable set is named as a second telescopic boom and a third telescopic boom … … inwards in sequence; the adjacent two stages of telescopic arms are driven by independent driving parts to control the extension and retraction of the adjacent two stages of telescopic arms; finally, the control motions of all the driving parts are mutually superposed, namely the total telescopic amount of the whole multi-stage telescopic arm; in general, the independent driving part can select a stroke oil cylinder; the stroke oil cylinder needs an oil tank, an oil pump and corresponding pipelines which are matched with the stroke oil cylinder to be connected with the stroke oil cylinder; when the number of stages of the telescopic arm is large, the required stroke oil cylinders and oil pumps are increased; the pipeline connected with the stroke oil cylinder is complicated, and the structure of the whole telescopic arm becomes complicated; the oil tank, the oil pump and the corresponding pipelines which are matched with the stroke oil cylinder only occupy a large amount; the manufacturing cost and the maintenance cost are quite large; when the multi-stage telescopic arm is arranged in a horizontal state, the problem is not easy to occur when the multi-stage telescopic arm extends outwards, but the retraction cannot depend on the dead weight, and the whole telescopic arm is easy to fail in return stroke due to the fact that a certain oil pump is under-pressure; how to simplify the structure of the multi-stage telescopic boom, reduce the number of driving parts (i.e. stroke cylinders) to save cost, and how to solve the return stroke problem of the telescopic boom in the horizontal state is a problem to be solved in the prior art.
Disclosure of Invention
The invention aims to solve the problems and provides a double-end driven horizontal multi-stage telescopic boom.
The technical scheme of the invention is as follows: a double-end driven horizontal multi-stage telescopic arm is sequentially sleeved with a first sleeve arm and a second sleeve arm … nth sleeve arm from outside to inside, wherein n is more than or equal to 3; a linkage mechanism is arranged between the adjacent sleeve arms;
the linkage mechanism comprises a fixed connection point A, a fixed connection point B, a guide wheel A and a stretching flexible piece; the fixed contact A is arranged at the front end of the kth-2 sleeve arm; the guide wheel A is arranged at the front end of the kth sleeve arm-1; the fixed contact B is arranged at the rear end of the kth sleeve arm, and k is more than or equal to 3 and less than or equal to n; in the linkage mechanism, one end of the flexible piece extending out is fixedly connected with a fixed connection point A, and the other end of the flexible piece is fixedly connected with a fixed connection point B after being wound around a guide wheel A;
the first sleeve arm is a fixed sleeve arm; the second set of arms are connected with an outward extending driving part, so that the second set of arms can extend outward in the first set of arms; the nth sleeve arm is connected with a retraction driving part, so that the nth sleeve arm can retract in the first sleeve arm; the output linear speed of the retraction driving component is n-1 times of the output linear speed of the extension driving component.
Preferably, the overhanging driving part comprises an overhanging guide wheel arranged at the front end of the first sleeve arm, an overhanging driving wheel arranged outside the first sleeve arm and an overhanging driving flexible piece; one end of the extending driving flexible piece is connected with the second set of arms, and the other end of the extending driving flexible piece is connected with the extending driving wheel after passing through the extending guide wheel.
Preferably, the extending flexible member is a steel wire rope, a chain or a chain; the retraction driving flexible part is a steel wire rope, a chain or a chain; the extending driving flexible part is a steel wire rope, a chain or a chain.
Preferably, the retraction drives the flexure horizontally into the guide roller b.
Preferably, the retraction driving part comprises a guide wheel B arranged at the inner rear part of the first sleeve arm, a retraction guide wheel arranged at the rear end of the first sleeve arm, a retraction driving wheel arranged outside the first sleeve arm and a retraction driving flexible part; one end of the retraction driving flexible part is connected with the nth sleeve arm, and the other end of the retraction driving flexible part is connected with the retraction driving wheel after passing through the retraction driving wheel and the guide wheel B.
Preferably, the guide wheel A, the guide wheel B and the retraction guide wheel all penetrate through the corresponding sleeve arm side wall to be fixed.
Preferably, the fixed connection point A of the same set of arms faces towards the middle, and the fixed connection point B faces towards the outer side.
The invention has the beneficial effects that: the double-end driven horizontal multi-stage telescopic boom sequentially sleeves a first sleeve boom and a second sleeve boom … nth sleeve boom from outside to inside, wherein n is more than or equal to 3; a linkage mechanism is arranged between the adjacent sleeve arms; the linkage mechanism comprises a fixed connection point A, a fixed connection point B, a guide wheel A and a stretching flexible piece; the fixed contact A is arranged at the front end of the kth-2 sleeve arm; the guide wheel A is arranged at the front end of the kth sleeve arm-1; the fixed contact B is arranged at the rear end of the kth sleeve arm, and k is more than or equal to 3 and less than or equal to n; in the linkage mechanism, one end of the flexible piece extending out is fixedly connected with a fixed connection point A, and the other end of the flexible piece is fixedly connected with a fixed connection point B after being wound around a guide wheel A; the first sleeve arm is a fixed sleeve arm; the second set of arms is connected with an overhanging driving part; the nth sleeve arm is connected with a retraction driving part; the retraction driving part adopts a flexible structure; the telescopic arm is extended through the extension driving part, the telescopic arm is retracted through the retraction driving part, and the structure is simplified through the linkage mechanism; no matter how many telescopic booms are, the telescopic boom can be stretched out and drawn back only by two powers.
Drawings
FIG. 1 is a schematic view of a double-end driven horizontal multi-stage telescopic boom according to a first embodiment;
FIG. 2 is a schematic structural view of the double-end driven horizontal multi-stage telescopic boom in the first embodiment when it is extended;
fig. 3 is a schematic structural view of a double-end driven horizontal multi-stage telescopic arm in the second embodiment;
in the figure: 1. the mechanical arm comprises a first set of arms, 2, a second set of arms, 3, a fixed joint A, 4, a guide wheel A, 5, a guide wheel B, 6, a fixed joint B, 7, an extending flexible piece, 8, an extending driving wheel, 9, an extending driving flexible piece, 10, a retracting guide wheel, 11, a retracting driving wheel, 12, a retracting driving flexible piece, 13, an nth set of arms and 14, and an extending guide wheel.
Detailed Description
The first embodiment is as follows: referring to fig. 1-2, a double-end driven horizontal multi-stage telescopic boom is sequentially sleeved with a first sleeve boom and a second sleeve boom …, wherein n is more than or equal to 3; n-2 sets of linkage mechanisms are arranged between the adjacent sleeve arms; in the embodiment, two sets of linkage mechanisms are arranged between the adjacent sleeve arms;
the linkage mechanism comprises a fixed connection point A, a fixed connection point B, a guide wheel A and a stretching flexible piece; the fixed contact A is arranged at the front end of the kth-2 sleeve arm; the guide wheel A is arranged at the front end of the kth sleeve arm-1; the fixed contact B is arranged at the rear end of the kth sleeve arm, and k is more than or equal to 3 and less than or equal to n; in the linkage mechanism, one end of the flexible piece extending out is fixedly connected with a fixed connection point A, and the other end of the flexible piece is fixedly connected with a fixed connection point B after being wound around a guide wheel A;
in the first embodiment, the linkage mechanism 1 comprises a fixed connection point A arranged at the front end of the first sleeve arm, a guide wheel A arranged at the front end of the second sleeve arm and a fixed connection point B arranged at the rear end of the third sleeve arm; the linkage mechanism 1 is responsible for enabling the second sleeve arm and the third sleeve arm to extend outwards relative to the first sleeve arm; the linkage mechanism 2 comprises a fixed connection point A arranged at the front end of the second sleeve arm, a guide wheel A arranged at the front end of the third sleeve arm and a fixed connection point B arranged at the rear end of the fourth sleeve arm; the linkage mechanism 2 is responsible for enabling the third set of arms and the fourth set of arms to extend outwards relative to the second set of arms;
the guide wheel A is used for changing the direction of the extending flexible part; the fixed connection point A and the fixed connection point B are only used for connecting the end parts of the extending flexible parts; the flexible parts have various choices, such as steel wire ropes, chains, belts and the like, and the corresponding guide wheel A is also correspondingly provided with steel wire rope idle wheels, chain wheels, belt pulleys and the like; all the flexible transmission can be correspondingly selected;
the first sleeve arm is a fixed sleeve arm; the second set of arms are connected with an outward extending driving part, so that the second set of arms can extend outward in the first set of arms; the nth sleeve arm is connected with a retraction driving part, so that the nth sleeve arm can retract in the first sleeve arm; one end of the retraction driving flexible part is connected with the nth sleeve arm, and the other end of the retraction driving flexible part is connected with the retraction driving wheel after being wound by the guide wheel B; the use of a flexible structure makes the entire telescopic arm more compact due to the longer stroke of the retraction driving part; the output linear speed of the retraction driving component is n-1 times of the output linear speed of the extension driving component.
Thus, when the fixed connection point B of the kth-1 sleeve arm moves forwards relative to the kth-2 sleeve arm, the guide wheel A and the fixed connection point B on the kth-1 sleeve arm also move forwards, and if the kth-2 sleeve arm is fixed, the forward guide wheel A can push against and wind a flexible part extending from the guide wheel A to pull the fixed connection point B on the kth sleeve arm to move forwards; thus, the k-1 sleeve arm moves forwards relative to the k-2 sleeve arm, and the k sleeve arm moves forwards relative to the k-1 sleeve arm by a corresponding amount; that is, the kth set arm moves twice the forward movement amount of the kth set arm 1 relative to the kth set arm 2; when the first set of arms is calculated, the forward displacement of the most n sets of arms relative to the first set of arms is n-1 times of the forward displacement of the most two sets of arms relative to the first set of arms, which is the extending process of the telescopic arms in the embodiment; in the retracting process of the telescopic arm, the retracting driving part pulls the nth sleeve arm to retract; the fixed contact B on the nth sleeve arm pulls the flexible piece to extend backwards to drive the guide wheels A on the nth-1 to sequentially transmit, and the second sleeve arm is sequentially retracted; the retracting amount of the most n sets of arms relative to the first set of arms is n-1 times of the retracting amount of the most two sets of arms relative to the first set of arms; that is, the linear velocity of the n-th set of arms driven by the retraction driving part must be n-1 times of the linear velocity of the second set of arms driven by the extension driving part, so as to ensure the normal extension and retraction of the telescopic arms;
the extending driving part comprises an extending guide wheel arranged at the front end of the first sleeve arm, an extending driving wheel arranged outside the first sleeve arm and an extending driving flexible part; one end of the extending driving flexible piece is connected with the second set of arms, and the other end of the extending driving flexible piece is connected with the extending driving wheel after passing through the extending guide wheel; the reason why the flexible structure is also selected for the extended drive part is to avoid occupying the space at the rear end of the first socket arm together with the retracted drive part, which complicates the structure.
The extending flexible part is a steel wire rope, a chain or a chain; the retraction drives a flexible part steel wire rope, or a chain; the extending driving flexible part is a steel wire rope, a chain or a chain.
The flexible part is driven to horizontally enter the guide wheel B by retraction, so that the telescopic arm can be retracted stably.
The retraction driving part comprises a guide wheel B arranged at the inner rear part of the first sleeve arm, a retraction guide wheel arranged at the rear end of the first sleeve arm, a retraction driving wheel arranged outside the first sleeve arm and a retraction driving flexible part; one end of the retraction driving flexible part is connected with the nth sleeve arm, and the other end of the retraction driving flexible part is connected with the retraction driving wheel after passing through the retraction driving wheel and the guide wheel B.
The guide wheel A, the guide wheel B and the retraction guide wheel penetrate through the corresponding sleeve arm side walls to be fixed; therefore, the flexible part can pass through the through holes broken by the guide wheel A, the guide wheel B and the retraction guide wheel, and meanwhile, the position of the flexible part passing through the corresponding sleeve arm can be changed due to the fact that the extension inclination angle of the flexible part in the working process is prevented from changing, and the sleeve arm needs to be additionally provided with avoiding holes to influence the structural strength of the sleeve arm.
The fixed connection point A of the same sleeve arm faces to the middle, and the fixed connection point B faces to the outer side, so that the number of times that the flexible part needs to penetrate through the sleeve arm is reduced, and the friction between the sleeve arm and the flexible part is reduced to protect the flexible part.
The working process of the embodiment: referring to fig. 1 and 2, n in this embodiment is 4;
the outward extending driving wheel winds up the outward extending driving flexible piece, and the retraction driving part stops running or moves in cooperation with the outward extending driving part; the rolled extending drive flexible piece pulls the second sleeve arm to enable the second sleeve arm and the guide wheel A on the second sleeve arm to move forwards; the guide wheel A on the second set of arm supports against the extending flexible part connected with the fixed connection point on the first set of arm; because the first sleeve arm is a fixed sleeve arm, the jacking of the guide wheel A of the second sleeve arm can pull the third sleeve arm to move forwards together through the fixed contact B on the third sleeve arm, and the forward movement of the third sleeve arm can naturally enable the guide wheel A on the third sleeve arm to jack the extending flexible part connected with the fixed contact A of the second sleeve arm; the extending flexible part can pull the fourth sleeve arm to extend outwards through a fixed contact B on the fourth sleeve arm, and the retraction driving part needs to passively or actively release the rolled retraction driving flexible part for matching, so that the extending action of the telescopic arm of the embodiment is realized;
the extending driving part stops running or is matched with the retracting driving part to move, and the retracting driving wheel winds up the retracting driving flexible part; the coiled retraction driving flexible piece pulls the fourth sleeve arm to retract through the retraction guide wheel and the guide wheel B; in the retraction process of the fourth sleeve arm, the fixed point B on the fourth sleeve arm pulls the extending flexible piece connected with the fixed point B, so that the guide wheel A on the third sleeve arm and the third sleeve arm are driven to retract; the third sleeve arm retracts, and the extending flexible piece connected with the third sleeve arm is pulled through the fixing point B on the third sleeve arm, so that the guide wheel A on the second sleeve arm and the second sleeve arm are driven to retract; the retraction of the second set of arms pulls the extending driving flexible piece connected with the second set of arms through the fixed point B on the second set of arms; the outwardly extending drive wheel is engaged by passively or actively unwinding the wound outwardly extending drive flexure.
Referring to fig. 3, the second embodiment is basically the same as the first embodiment in terms of solution, and the same points are not described again, except that: if n is 3, the second embodiment has three arms, namely a first arm, a second arm and a third arm; 1 linkage mechanism is arranged between adjacent sleeve arms; the linkage mechanism comprises a fixed connection point A arranged at the front end of the first sleeve arm, a guide wheel A arranged at the front end of the second sleeve arm and a fixed connection point B arranged at the rear end of the third sleeve arm; the linkage mechanism is responsible for enabling the second set of arms and the third set of arms to extend outwards relative to the first set of arms.
Claims (7)
1. A double-end driven horizontal multistage telescopic arm is characterized in that a first sleeve arm and a second sleeve arm … nth sleeve arm are sleeved in sequence from outside to inside, wherein n is more than or equal to 3; a linkage mechanism is arranged between the adjacent sleeve arms;
the linkage mechanism comprises a fixed connection point A, a fixed connection point B, a guide wheel A and a stretching flexible piece; the fixed contact A is arranged at the front end of the kth-2 sleeve arm; the guide wheel A is arranged at the front end of the kth sleeve arm-1; the fixed contact B is arranged at the rear end of the kth sleeve arm, and k is more than or equal to 3 and less than or equal to n; in the linkage mechanism, one end of the flexible piece extending out is fixedly connected with a fixed connection point A, and the other end of the flexible piece is fixedly connected with a fixed connection point B after being wound around a guide wheel A;
the first sleeve arm is a fixed sleeve arm; the second set of arms are connected with an outward extending driving part, so that the second set of arms can extend outward in the first set of arms; the nth sleeve arm is connected with a retraction driving part, so that the nth sleeve arm can retract in the first sleeve arm; the output linear speed of the retraction driving component is n-1 times of the output linear speed of the extension driving component.
2. The double-ended driven horizontal multi-stage telescopic boom of claim 1, wherein: the extending driving part comprises an extending guide wheel arranged at the front end of the first sleeve arm, an extending driving wheel arranged outside the first sleeve arm and an extending driving flexible part; one end of the extending driving flexible piece is connected with the second set of arms, and the other end of the extending driving flexible piece is connected with the extending driving wheel after passing through the extending guide wheel.
3. The double-ended driven horizontal multi-stage telescopic boom of claim 2, wherein: the retraction driving part comprises a guide wheel B arranged at the inner rear part of the first sleeve arm, a retraction guide wheel arranged at the rear end of the first sleeve arm, a retraction driving wheel arranged outside the first sleeve arm and a retraction driving flexible part; one end of the retraction driving flexible part is connected with the nth sleeve arm, and the other end of the retraction driving flexible part is connected with the retraction driving wheel after passing through the retraction driving wheel and the guide wheel B.
4. The double-ended driven horizontal multi-stage telescopic boom of claim 3, wherein: the extending flexible part is a steel wire rope, a chain or a chain; the retraction driving flexible part is a steel wire rope, a chain or a chain; the extending driving flexible part is a steel wire rope, a chain or a chain.
5. The double-end driven horizontal multi-stage telescopic boom of claim 3, wherein: retraction drives the flexure horizontally into guide wheel b.
6. The double-end driven horizontal multi-stage telescopic boom of claim 3, wherein: the guide wheel A, the guide wheel B and the retraction guide wheel all penetrate through the corresponding sleeve arm side walls to be fixed.
7. The double-ended driven horizontal multi-stage telescopic boom of claim 1, wherein: the fixed connection point A of the same set of arms faces towards the middle, and the fixed connection point B faces towards the outer side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122804102.7U CN216471925U (en) | 2021-11-16 | 2021-11-16 | Double-end driven horizontal multi-stage telescopic boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122804102.7U CN216471925U (en) | 2021-11-16 | 2021-11-16 | Double-end driven horizontal multi-stage telescopic boom |
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| Publication Number | Publication Date |
|---|---|
| CN216471925U true CN216471925U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122804102.7U Active CN216471925U (en) | 2021-11-16 | 2021-11-16 | Double-end driven horizontal multi-stage telescopic boom |
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|---|---|
| CN (1) | CN216471925U (en) |
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2021
- 2021-11-16 CN CN202122804102.7U patent/CN216471925U/en active Active
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