CN216403652U - Bidirectional-driven horizontal multi-stage telescopic arm - Google Patents
Bidirectional-driven horizontal multi-stage telescopic arm Download PDFInfo
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- CN216403652U CN216403652U CN202122804104.6U CN202122804104U CN216403652U CN 216403652 U CN216403652 U CN 216403652U CN 202122804104 U CN202122804104 U CN 202122804104U CN 216403652 U CN216403652 U CN 216403652U
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Abstract
A bidirectional-driven horizontal multi-stage telescopic boom is sequentially sleeved with a first set of boom and a second set of boom …, wherein n is more than or equal to 3; a linkage mechanism is arranged between the adjacent sleeve arms; the linkage mechanism comprises an outer fixed point, an inner fixed point, an outer guide wheel, an inner guide wheel, an extending flexible piece and a retracting flexible piece; the outer fixing point is arranged at the outer end of the kth-2 sleeve arm; the outer guide wheel is arranged at the outer end of the kth-1 sleeve arm; the inner guide wheel is arranged at the inner end of the k-1 sleeve arm; the inner fixed point is arranged at the inner 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, the extending flexible piece and the retracting flexible piece form a closed loop structure and are respectively connected with an outer fixed point and an inner fixed point; the second set of arms is connected with the telescopic driving part. The utility model can drive the nth set of arms to synchronously stretch by n-1 times of the distance by driving the second set of arms to stretch by a certain distance, has simple structure and can drive all the stretching arms to stretch by only one driving part.
Description
Technical Field
The utility model relates to the technical field of multi-stage telescopic booms, in particular to a bidirectional-driven horizontal multi-stage telescopic boom.
Background
The telescopic boom originally specially refers to a working device arranged on a crane, and the movable body extends out and retracts under the action of a telescopic cylinder by a fixed body and the movable body, so that a larger digging radius and a reasonable loading height are achieved; the telescopic boom has wider application range at present, and can be applied to all occasions with linear movement, such as the application in the horizontal direction mentioned in the application. The telescopic boom is divided into two types according to the working form, namely a sliding telescopic boom and a sleeved telescopic boom; the sliding type telescopic arm enables the moving body to slide on the fixed body under the action of the telescopic cylinder and the sliding block, and the main components comprise the fixed body, the moving body, the sliding block, the telescopic cylinder and the like; the sliding telescopic boom has the advantages of large stress, simple structure, low production cost and the like, but the travel is small, generally the travel is within 4 meters, and generally the two-section telescopic boom can only be designed; the multi-stage telescopic arm, namely a sleeve type telescopic arm, also called a built-in telescopic arm, has the structure that the first section is a fixed body, the rest are moving bodies, all the moving bodies are arranged in the fixed body, and the principle is that the multi-stage telescopic arm extends or retracts through a stroke oil cylinder in a way of connecting two sections and three sections, only one fixed body and two or more moving bodies are arranged, and the number of the stroke oil cylinders is equal to one minus one of all the moving bodies; the multi-stage telescopic boom has larger operation radius, but has more complex structure and higher production cost, and can be generally designed into three sections; how to simplify the structure of the multi-stage telescopic arm and reduce the number of power sources (namely stroke oil cylinders) to save cost is a problem to be solved in the prior art; in addition, the telescopic arm on the excavator has an elevation angle when being applied, the return stroke is returned by the dead weight, the application occasion of the telescopic arm is horizontal, the return stroke cannot depend on the dead weight, and the problem that how to return the telescopic arm is needed to be solved in the prior art is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provides a bidirectional-driven horizontal multi-stage telescopic arm.
The technical scheme of the utility model is as follows: a bidirectional-driven horizontal multi-stage telescopic arm is characterized in that a first sleeve arm and a second sleeve arm … nth sleeve arm are sequentially sleeved 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 an outer fixed point, an inner fixed point, an outer guide wheel, an inner guide wheel, an extending flexible piece and a retracting flexible piece; the external fixed point is arranged at the front end of the kth-2 sleeve arm; the outer guide wheel is arranged at the front end of the kth sleeve arm-1; the inner guide wheel is arranged at the rear end of the kth-1 sleeve arm; the inner fixed point 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 of the linkage mechanism is fixedly connected with an outer fixed point, and the other end of the flexible piece is fixedly connected with an inner fixed point after passing through an outer guide wheel; in the linkage mechanism, one end of the retracting flexible piece is fixedly connected with the inner fixed point, and the other end of the retracting flexible piece is fixedly connected with the outer fixed point after passing through the inner guide wheel;
the first sleeve arm is a fixed sleeve arm; the second set of arms is connected with a telescopic driving part, so that the second set of arms can be telescopic in the first set of arms.
Preferably, the telescopic driving part comprises a driving wheel arranged outside the first telescopic arm, a telescopic driving flexible piece wound on the driving wheel, an extension driving guide wheel arranged at the front end of the first telescopic arm and a contraction driving guide wheel arranged at the rear end of the first telescopic arm; two ends of the flexible driving part are respectively and fixedly connected to the second sleeve arm through the extension driving guide wheel forwards and the retraction driving guide wheel backwards; the middle part of the flexible part driven by the telescopic mechanism is connected with the driving wheel.
Preferably, the extending flexible member is a steel wire rope or a chain; the retractable flexible part is a steel wire rope or a chain; the flexible driving part is a steel wire rope or a chain or a synchronous belt.
Preferably, the telescopic driving part is a linear motion driving part arranged between the first set of arms and the second set of arms.
Preferably, the linear motion driving part is driven by a hydraulic cylinder or an air cylinder or an electric push rod or a lead screw nut, and the two input and output ends of the hydraulic cylinder or the air cylinder or the electric push rod or the lead screw nut are respectively connected to the second set of arms and the first set of arms.
Preferably, the outer guide wheel, the inner guide wheel, the extension driving guide wheel and the contraction driving guide wheel all penetrate through the corresponding sleeve arm side wall and then are fixed.
Preferably, the outer fixing points are directed inward and the inner fixing points are directed outward.
Preferably, the outer attachment point on the same set of arms is near the center with respect to the outer guide wheel profile and the inner attachment point is far from the center with respect to the inner guide wheel profile.
The utility model has the beneficial effects that: the bidirectional-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 an outer fixed point, an inner fixed point, an outer guide wheel, an inner guide wheel, an extending flexible piece and a retracting flexible piece; the outer fixing point is arranged at the outer end of the kth-2 sleeve arm; the outer guide wheel is arranged at the outer end of the kth-1 sleeve arm; the inner guide wheel is arranged at the inner end of the k-1 sleeve arm; the inner fixed point is arranged at the inner end of the kth sleeve arm, k is more than or equal to 3 and less than or equal to n in the linkage mechanism, the extending flexible piece and the retracting flexible piece form a closed loop structure and are respectively connected with the outer fixed point and the inner fixed point; the second set of arms is connected with the telescopic driving part. The utility model can drive the nth set of arms to synchronously stretch by n-1 times of the distance by driving the second set of arms to stretch by a certain distance, has simple structure and can drive all the stretching arms to stretch by only one driving part.
Drawings
FIG. 1 is a schematic view of a bi-directionally driven horizontal multi-stage telescopic boom according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of the bi-directional driving horizontal multi-stage telescopic boom of the first embodiment when it is extended;
FIG. 3 is a schematic structural view of a bi-directionally driven horizontal multi-stage telescopic arm according to a second embodiment;
FIG. 4 is a schematic structural view of a bi-directionally driven horizontal multi-stage telescopic arm according to a third embodiment;
in the figure: 1. the flexible telescopic arm comprises a first sleeve arm, 2, a second sleeve arm, 3, an outer fixing point, 4, an outer guide wheel, 5, an inner guide wheel, 6, an inner fixing point, 7, an extending flexible part, 8, a retracting flexible part, 10, an nth sleeve arm, 11, a driving wheel, 12, a telescopic driving flexible part, 13, an extending driving guide wheel, 14, a retracting driving guide wheel and 15, and a linear motion driving part.
Detailed Description
The first embodiment is as follows: referring to fig. 1-2, a bidirectional-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; in the embodiment, n is 4; like the multi-stage telescopic boom described in the background art, the first set of boom is a fixed body, and the nth set of boom of the second set of boom … is a moving body; 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 an outer fixed point, an inner fixed point, an outer guide wheel, an inner guide wheel, an extending flexible piece and a retracting flexible piece; the external fixed point is arranged at the front end of the kth-2 sleeve arm; the outer guide wheel is arranged at the front end of the kth sleeve arm-1; the inner guide wheel is arranged at the rear end of the kth-1 sleeve arm; the inner fixed point 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 of the linkage mechanism is fixedly connected with an outer fixed point, and the other end of the flexible piece is fixedly connected with an inner fixed point after passing through an outer guide wheel; in the linkage mechanism, one end of the retracting flexible piece is connected with the outer fixed point, and the other end of the retracting flexible piece is connected with the inner fixed point after passing through the inner guide wheel;
in the first embodiment, the linkage mechanism 1 comprises an external fixed point arranged at the front end of the first sleeve arm, an external guide wheel arranged at the front end of the second sleeve arm, an internal guide wheel arranged at the rear end of the second sleeve arm and an internal fixed point arranged at the rear end of the third sleeve arm; the linkage mechanism 1 is responsible for enabling the second set of arms and the third set of arms to extend and retract relative to the first set of arms; the linkage mechanism 2 comprises an external fixed point arranged at the front end of the second sleeve arm, an external guide wheel arranged at the front end of the third sleeve arm, an internal guide wheel arranged at the rear end of the third sleeve arm and an internal fixed point 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 and retract relative to the second set of arms;
the first sleeve arm is a fixed sleeve arm; the second set of arms is connected with a telescopic driving part, so that the second set of arms can be telescopic in the first set of arms. Thus, the power source for moving the second set of arms is obtained, and is the only power source in the embodiment. The power source can be hydraulic cylinder transmission, gear rack transmission, lead screw transmission and the like.
Thus, in the same linkage mechanism, assuming that the outer fixed point is a fixed base point, when the outer guide wheel and the inner guide wheel move relative to the outer fixed point, the inner fixed point moves along with the outer guide wheel in the same direction due to closed loop constraint formed by the retracting flexible piece and the extending flexible piece; the movement amount of the outer guide wheel/the inner guide wheel relative to the outer fixed point is equal to the movement amount of the inner fixed point relative to the inner guide wheel (the same is used here, and the directions and the magnitudes of the two movements are consistent); in this way, the amount of movement of the inner fixing point relative to the outer fixing point corresponds to twice the amount of movement of the outer guide wheel/inner guide wheel relative to the outer fixing point; the movement amount of the kth sleeve arm relative to the kth-2 sleeve arm is equivalent to 2 times of the movement amount of the kth-1 sleeve arm relative to the kth-2 sleeve arm (k- (k-2) = 2) when the kth sleeve arm is switched to the sleeve arm corresponding to the linkage mechanism; considering all the sleeve arms together, the movement amount of the second sleeve arm, which is n-1 times of the nth sleeve arm relative to the first sleeve arm, can be obtained; therefore, in the embodiment, as long as the second set of arms is driven to move for a certain distance, the nth set of arms moves forward by n-1 times of the moving distance relative to the first set of arms; in combination with the background art, the first set of arms actually corresponds to the fixed body of the prior art, and the second set of arms …, the nth set of arms, corresponds to the moving body of the prior art.
It should be noted that in the linkage mechanism of the first embodiment, both the outer guide wheel and the inner guide wheel are used for changing the direction of the flexible member; the inner fixing point and the outer fixing point are only used for connecting the end parts of the flexible parts; the flexible parts have various choices, such as steel wire ropes, chains, belts and the like, and the corresponding guide wheels are 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 telescopic driving part comprises a driving wheel arranged outside the first sleeve arm, a telescopic driving flexible piece wound on the driving wheel, an extension driving guide wheel arranged at the front end of the first sleeve arm and a contraction driving guide wheel arranged at the front end of the first sleeve arm; two ends of the flexible driving part are respectively and fixedly connected to the second sleeve arm through the extension driving guide wheel forwards and the retraction driving guide wheel backwards; the middle part of the flexible part driven by the telescopic mechanism is connected with a driving wheel; the extension driving guide wheel and the contraction driving guide wheel help the flexible piece to be driven in a telescopic mode to form a closed loop structure; then the flexible parts are respectively connected with the driving wheel and the second set of arms; thus, the driving wheel rotates to drive the second set of arms to move by virtue of the telescopic driving flexible part; the second set of arms moves relative to the first set of arms, and actually the second set of arms stretches relative to the first set of arms; then, by means of the linkage mechanism, as with the Miao dominos, the second set of arms stretch and drive the third set of arms to stretch; the third set of arms stretches and contracts and drives the fourth set of arms to stretch and contract; finally, the telescopic amount of the fourth set of arms relative to the first set of arms is actually three times that of the second set of arms relative to the first set of arms; and the telescopic driving part outputs the telescopic amount of the second telescopic arm, so that the fourth telescopic arm can be driven to stretch three times of the output amount of the telescopic driving part relative to the first telescopic arm.
The extending flexible part is a steel wire rope or a chain; the flexible part retracting steel wire rope or chain; the telescopic driving flexible part is a steel wire rope or a chain.
The outer guide wheel, the inner guide wheel, the extension driving guide wheel and the contraction driving guide wheel penetrate through the corresponding sleeve arm side walls and are fixed. Therefore, the flexible part can pass through the through holes broken by the outer guide wheel, the inner guide wheel, the extension driving guide wheel and the contraction driving guide wheel; if the outer guide wheel, the inner guide wheel, the extension driving guide wheel and the contraction driving guide wheel do not penetrate through the casing of the telescopic arm, the position of the flexible part penetrating through the corresponding telescopic arm is changed due to the change of the inclination angle of the flexible part in the telescopic process, and the telescopic arm needs to be additionally provided with longer avoiding holes to influence the structural strength of the telescopic arm.
The number of times the flexure needs to pass through the cuff arms is reduced with the outer attachment point facing inward and the inner attachment point facing outward, thereby reducing the friction the flexure needs to face.
The outer fixed point on the same set of arms is close to the center relative to the outline of the outer guide wheel, and the inner fixed point is far from the center relative to the outline of the inner guide wheel; therefore, the routes of the connected flexible parts cannot interfere with each other, and the safety and stability of the telescopic arm in the telescopic process are ensured.
The working process of the first embodiment:
the driving wheel drives the flexible piece to move in a telescopic way; the second set of arms connected to the telescoping drive flexure follow the synchronous motion; the second set of arms move synchronously and in the same direction at the outer fixed point, the outer guide wheel and the inner guide wheel; the outer guide wheel and the inner guide wheel of the second sleeve arm move to push the third sleeve arm to synchronously move in the same direction and in the same quantity relative to the second sleeve arm at the outer fixed point; such that the third set of arms performs twice the amount of movement of the second set of arms relative to the first set of arms; by analogy, the fourth set of arms can move 3 times of the second set of arms relative to the first set of arms, namely the telescopic amount of the fourth set of arms is 3 times of that of the second set of arms; the second set of arms is directly driven by the telescopic driving part.
Example two: referring to fig. 3, the second embodiment is substantially the same as the first embodiment, and the same parts are not described again, except that: n is 3, in the second embodiment, three sleeve arms are shared, namely a first sleeve arm, a second sleeve arm and a third sleeve arm; 1 linkage mechanism is arranged between adjacent sleeve arms; the linkage mechanism comprises an external fixed point arranged at the front end of the first sleeve arm, an external guide wheel arranged at the front end of the second sleeve arm, an internal guide wheel arranged at the rear end of the second sleeve arm and an internal fixed point 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 and retract relative to the first set of arms;
example three: referring to fig. 4, the third embodiment is substantially the same as the first embodiment, and the same parts are not described again, except that: the telescopic driving part is a linear motion driving part arranged between the first set of arms and the second set of arms.
The linear motion driving part is driven by a hydraulic cylinder or an air cylinder or an electric push rod or a lead screw nut, and the input end and the output end of the hydraulic cylinder or the air cylinder or the electric push rod or the lead screw nut are respectively connected to the second sleeve arm and the first sleeve arm.
The linear motion driving part directly drives the second set of arms to move, so that the whole telescopic arm is telescopic.
Claims (8)
1. A bidirectional-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 an outer fixed point, an inner fixed point, an outer guide wheel, an inner guide wheel, an extending flexible piece and a retracting flexible piece; the external fixed point is arranged at the front end of the kth-2 sleeve arm; the outer guide wheel is arranged at the front end of the kth sleeve arm-1; the inner guide wheel is arranged at the rear end of the kth-1 sleeve arm; the inner fixed point 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 of the linkage mechanism is fixedly connected with an outer fixed point, and the other end of the flexible piece is fixedly connected with an inner fixed point after passing through an outer guide wheel; in the linkage mechanism, one end of the retracting flexible piece is fixedly connected with the inner fixed point, and the other end of the retracting flexible piece is fixedly connected with the outer fixed point after passing through the inner guide wheel;
the first sleeve arm is a fixed sleeve arm; the second set of arms is connected with a telescopic driving part, so that the second set of arms can be telescopic in the first set of arms.
2. The bi-directionally driven horizontal multi-stage telescopic boom of claim 1, wherein: the telescopic driving part comprises a driving wheel arranged outside the first telescopic arm, a telescopic driving flexible piece wound on the driving wheel, an extension driving guide wheel arranged at the front end of the first telescopic arm and a contraction driving guide wheel arranged at the rear end of the first telescopic arm; two ends of the flexible driving part are respectively and fixedly connected to the second sleeve arm through the extension driving guide wheel forwards and the retraction driving guide wheel backwards; the middle part of the flexible part driven by the telescopic mechanism is connected with the driving wheel.
3. The bi-directionally driven horizontal multi-stage telescopic boom of claim 2, wherein: the extending flexible part is a steel wire rope or a chain; the retractable flexible part is a steel wire rope or a chain; the flexible driving part is a steel wire rope or a chain or a synchronous belt.
4. The bi-directionally driven horizontal multi-stage telescopic boom of claim 1, wherein: the telescopic driving part is a linear motion driving part arranged between the first set of arms and the second set of arms.
5. The bi-directionally driven horizontal multi-stage telescopic boom of claim 4, wherein: the linear motion driving part is driven by a hydraulic cylinder or an air cylinder or an electric push rod or a lead screw nut, and the input end and the output end of the hydraulic cylinder or the air cylinder or the electric push rod or the lead screw nut are respectively connected to the second sleeve arm and the first sleeve arm.
6. The bi-directionally driven horizontal multi-stage telescopic boom of claim 2, wherein: the outer guide wheel, the inner guide wheel, the extension driving guide wheel and the contraction driving guide wheel penetrate through the corresponding sleeve arm side walls and are fixed.
7. The bi-directionally driven horizontal multi-stage telescopic boom of claim 1, wherein: the outer fixing points face inward, and the inner fixing points face outward.
8. The bi-directionally driven horizontal multi-stage telescoping arm of claim 7, wherein: the outer attachment points on the same set of arms are closer to the center relative to the outer guide wheel profile and the inner attachment points are further from the center relative to the inner guide wheel profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122804104.6U CN216403652U (en) | 2021-11-16 | 2021-11-16 | Bidirectional-driven horizontal multi-stage telescopic arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122804104.6U CN216403652U (en) | 2021-11-16 | 2021-11-16 | Bidirectional-driven horizontal multi-stage telescopic arm |
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| Publication Number | Publication Date |
|---|---|
| CN216403652U true CN216403652U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122804104.6U Active CN216403652U (en) | 2021-11-16 | 2021-11-16 | Bidirectional-driven horizontal multi-stage telescopic arm |
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| CN (1) | CN216403652U (en) |
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2021
- 2021-11-16 CN CN202122804104.6U patent/CN216403652U/en active Active
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