CN103241663A - Crane, and telescopic arm and knuckle arm thereof - Google Patents
Crane, and telescopic arm and knuckle arm thereof Download PDFInfo
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- CN103241663A CN103241663A CN2013101634832A CN201310163483A CN103241663A CN 103241663 A CN103241663 A CN 103241663A CN 2013101634832 A CN2013101634832 A CN 2013101634832A CN 201310163483 A CN201310163483 A CN 201310163483A CN 103241663 A CN103241663 A CN 103241663A
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Abstract
The invention discloses a crane, and a telescopic arm and a knuckle arm thereof. In the disclosed knuckle arm of the crane, a front wall and a rear wall form a bilateral symmetric structure, so that the strength in the left and right directions can be maintained equivalent basically, and the basic stability of the knuckle arm can be guaranteed. A protruded folding surface structure is formed on the rear wall, and two bent surfaces are formed on the rear surface. Under the situation that the circumferential length of the cross section of the knuckle arm is maintained constant, the modulus of the cross section of the knuckle arm increases, the bending strength, the twisting strength and the compressive strength of the knuckle arm can be improved, the stability of the knuckle arm can be improved, and the possibility of sidewise bending of the knuckle arm can be reduced. Meanwhile, four bent surfaces are formed on the front wall, so that compared with a structure with two bent surfaces formed on the front wall, the structure has the advantages that the modulus of the cross section of the knuckle arm also can increase, the strength and the stability of the knuckle arm also can be improved, and the possibility of sidewise bending of the knuckle arm can be reduced.
Description
Technical field
The present invention relates to the hoisting crane technology, particularly a kind of joint arm of hoisting crane also relates to a kind of telescopic boom of hoisting crane and comprises the hoisting crane of this telescopic boom.
Background technology
Hoisting crane generally includes body and the jib that is installed on the body.Current, the jib of hoisting crane is generally telescopic boom.Telescopic boom comprises the joint arm of a plurality of inside and outside suits.The joint arm is tubular structure, comprises antetheca, Zuo Bi, postbrachium and You Bi.In order to guarantee inside and outside two adjacent bearing fits that save between the arms, between the inside and outside adjacent joint arm slide block can be set.Slide block can link to each other with the internal face of outside segments arm, and with the outside wall surface bearing fit of inside joint arm, form the strong points between inside and outside adjacent two joint arms.In order to guarantee to save the arm stress balance, symmetrical a plurality of slide block is set usually.
Please refer to Fig. 1, this figure is known a kind of cross section structure scheme drawing that saves arm; For convenience, in each accompanying drawing of presents, arrow B is oriented to the rear, and arrow F is oriented to the place ahead.This joint arm is spliced to form by back steel plate 100 and front spring 200; Back steel plate 100 centre portions form the rear wall of joint arm, and dual-side extends forward; The centre portion of front spring 200 forms the antetheca of joint arm, and dual-side extends back; The dual-side of the dual-side of back steel plate 100 and front spring 200 is in conjunction with forming Zuo Bi and You Bi, and is weldingly connected at the W place.The antetheca of this joint arm forms the folding face structure of evagination, comprises symmetrical two bending sides 201,202.When utilizing the assembling of this joint arm to form telescopic boom, slide block can with two bending sides 201,202 bearing fits of antetheca.
Please refer to Fig. 2, this figure is the cross section structure scheme drawing that known another kind saves arm.The antetheca of the joint arm front spring 200 of this structure basically forms the arc structure of an evagination.This arc structure can be by repeatedly bending formation; In side-to-side dimensions hour, be difficult to or can not split into arc structure.Therefore, generally under the bigger situation of the side-to-side dimensions of joint arm, just adopt this structure.The bearing fit of adjacent joint arm inside and outside the joint arm of this structure can guarantee, the area of contact of raising bearing fit.
Current, as depicted in figs. 1 and 2, stressed for the rear wall that guarantees to save arm, rear wall is set to planar structure usually, to increase the area of contact between the inside and outside adjacent joint arm, reduces stress and concentrates.
In actual use, existing joint arm is easy to take place the side sway phenomenon, and stability is lower, and then causes telescopic boom shorter service life.Though can increase the stability of joint arm by using thicker steel plate manufacturing joint arm, this causes material consumption to increase again, makes the weight of joint arm significantly increase, and then causes telescopic boom overweight.
Therefore, how when the material consumption that keeps the joint arm was constant substantially, improving joint arm stability was the technical barrier that current those skilled in the art need solve.
Summary of the invention
In view of this, the invention provides a kind of joint arm of hoisting crane, this joint arm can improve the stability of joint arm when keeping material consumption constant substantially.
In addition, also provide a kind of telescopic boom of the hoisting crane that comprises above-mentioned joint arm and comprise the hoisting crane of this telescopic boom.
The joint arm of the hoisting crane that provides comprises antetheca, Zuo Bi, rear wall and You Bi, and described antetheca and rear wall all form folding face structure evagination, symmetrical; Described antetheca forms four bending sides, and described rear wall forms two bending sides.
Optionally, described joint arm is surrounded by a sheet material bending, being fixedly linked by welding in conjunction with the limit of formation.
Optionally, on the described left-right symmetric face that is positioned at described joint arm in conjunction with the limit.
Optionally, describedly be arranged in described antetheca in conjunction with the limit.
Optionally, the width of four of described antetheca bending sides equates.
Optionally, in the described antetheca, the bending side that links to each other with described left wall is first bending side, and the bending side that links to each other with described first bending side is second bending side; The width of described second bending side is greater than the width of described first bending side.
Optionally, the width of described second bending side is 1.3～1.5 times of width of described first bending side.
The telescopic boom of the hoisting crane that provides comprises the joint arm of a plurality of inside and outside suits, and described joint arm is the joint arm of above-mentioned any hoisting crane.
Optionally, between inside and outside adjacent two joint arms at least 6 slide blocks are set; Described slide block all links to each other with the internal face of the described joint arm of outside; Four bending side bearing fits that at least four described slide blocks form with the antetheca of the described joint arm of inside respectively; Two bending side bearing fits that at least two described slide blocks form with the rear wall of the described joint arm of inside respectively.
The hoisting crane that provides comprises body and the telescopic boom that is installed on the described body, and described telescopic boom is the telescopic boom of above-mentioned any hoisting crane.
In the joint arm of hoisting crane provided by the invention, antetheca and rear wall form symmetrical structure, can guarantee that left and right directions intensity is equal substantially, guarantee the basicly stable of joint arm.Because rear wall forms the folding face structure of evagination, and rear wall forms two bending sides.Like this, keeping under the constant situation of joint arm perimeter of section, section modulus that can envoy's arm increases, and then can improve bending resistance, the antitorque and compressive strength of joint arm, improves the stability of joint arm, reduces the side sway phenomenon of joint arm.Simultaneously, antetheca forms four bending sides, compares with the structure of two bending sides of existing formation, and this structure also can improve the section modulus that increases the joint arm, is conducive to improve joint arm intensity and stability, reduces the side sway phenomenon of joint arm.In addition, antetheca forms four bending sides, when the assembling telescopic boom, can make more at least four bending side bearing fits of four slide blocks and antetheca, and then can improve stability and the reliability of interior acromere arm bearing fit.
In further technical scheme, the joint arm is surrounded by a sheet material material, and makes in conjunction with the limit by welding manner and to be fixedly linked.Compare with the joint arm that is combined into by the multi-sheets material, on the one hand, because joint arm side face only has weld seam one, and then is conducive to guarantee to save the build guality of arm, improve the reliability of joint arm; On the other hand, can be so that the bulk strength of joint arm significantly improve, and then be conducive to improve the stability of joint arm, further reduce the side sway phenomenon of joint arm.
In technical scheme further, on the described left-right symmetric face that is positioned at described joint arm in conjunction with the limit, and be arranged in described antetheca, make in conjunction with the limit to be positioned at the less position of stress, can reduce to weld the adverse effect to joint arm intensity better.
In further technical scheme, in the described antetheca, the bending side that links to each other with described left wall is first bending side, and the bending side that links to each other with described first bending side is second bending side; The width of described second bending side is greater than the width of described first bending side.Can improve the intensity of the left and right directions of antetheca like this, utilize the intensity of the fore-and-aft direction that Zuo Bi and You Bi provide more fully, and then can on the basis that guarantees joint arm bulk strength, improve the intensity on the left and right directions that saves arm, for the side sway phenomenon that reduces the joint arm provides favourable prerequisite.
The telescopic boom that comprises above-mentioned joint arm and the hoisting crane that provide also have corresponding technique effect.
Description of drawings
The accompanying drawing that constitutes a part of the present invention is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.
Fig. 1 is known a kind of cross section structure scheme drawing that saves arm;
Fig. 2 is the cross section structure scheme drawing that known another kind saves arm;
Fig. 3 is the stressed principle schematic of telescopic crane boom;
A kind of cross section structure scheme drawing that saves arm that Fig. 4 provides for the embodiment of the invention;
Fig. 5 is I-I part-structure scheme drawing among Fig. 4.
Among the figure:
Antetheca 310, bending side 311, bending side 312, bending side 313, bending side 314, left wall 320, rear wall 330, bending side 331, bending side 332, right wall 340;
In conjunction with limit J, left-right symmetric face P.
The specific embodiment
Based on technical barrier in the background technology, the applicant studies the stressing conditions of telescopic boom and joint arm.Please refer to Fig. 3, this figure is the stressed principle schematic of telescopic boom; This illustrates first segment arm 10, the second joint arm 20 and the 3rd joint arm 30 of ecto-entad order suit.Under the effect of load G, for the second joint arm 20, the antetheca bearing fit of its antetheca and the 3rd joint arm 30, the inside face of rear wall is subjected to the rear wall of the 3rd joint arm 30 towards the application force of outside, simultaneously, the outside face of the second joint arm, 20 rear walls is subjected to the inside face of first segment arm 10 rear walls towards the application force of inside; And then, can determine that the rear wall of the second joint arm 20 is subjected to multiple action power, and then the rear wall structure of existing joint arm may be the reason that causes saving the side sway of arm.The applicant thinks: the integral body based on the joint arm is polygonized structure, and the rear wall of joint arm is stressed, and to be mainly the rear wall both sides stressed, and then may cause the rear wall both sides to be subjected to force unbalance, and then envoy's arm produces the side sway phenomenon.Based on above-mentioned analysis, the present invention proposes the technical scheme of improving the joint arm configuration, to solve above-mentioned technical barrier.
Below embodiment provided by the invention is described.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the present invention can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Please refer to Fig. 4, this figure is a kind of cross section structure scheme drawing that saves arm that the embodiment of the invention provides; Among the figure, arrow B is oriented to the rear, and arrow F is oriented to the place ahead, and arrow L is oriented to left, and arrow R is oriented to right-hand.The joint arm of this hoisting crane is tubular structure, comprises antetheca 310, left wall 320, rear wall 330 and right wall 340.Wherein, antetheca 310 and rear wall 330 are symmetrical structure, can improve stability about the joint arm like this.Simultaneously, antetheca 310 and rear wall 330 all form the folding face structure of evagination, can improve the rigidity of joint arm like this.Wherein, antetheca 310 forms four bending sides 311,312,313,314.Rear wall 330 forms two bending sides 331,332.In actual applications, the joint arm that this embodiment provides can reduce the side sway phenomenon of joint arm keeping having stronger stability under the constant situation of perimeter of section.
It has stronger stability reasons, and the applicant thinks: because rear wall 330 forms the folding face structure of evagination, and rear wall 330 forms two bending sides 331,332; Keeping under the constant situation of joint arm perimeter of section, section modulus that can envoy's arm increases, and then can improve bending resistance, the antitorque and compressive strength of joint arm, and then can improve the stability of joint arm, reduces the side sway phenomenon of joint arm.In addition, compare with the structure of two bending sides of existing formation, antetheca 310 forms four bending sides 311,312,313,314, also can improve the section modulus that increases the joint arm, is conducive to improve joint arm intensity and stability, reduces the side sway phenomenon of joint arm.
In one embodiment, when the assembling telescopic boom, can utilize antetheca 310 to form four bending sides 311,312,313,314; Make four bending sides 311,312,313,314 respectively with predetermined slide block bearing fit, the strong point of acromere arm in can increasing like this reduces stress and concentrates.When contrasting joint arm that an embodiment of the invention provides with the arm of joint shown in Fig. 1 (perimeter of section, sheet material material thickness equate that all antetheca 310 is different with the structure of rear wall 330), the stress at antetheca 310 strong point places can reduce by 15%; In addition, owing to form a plurality of strong points, can improve reliability and the flexible stability of bearing fit between the interior acromere arm.
Compare with structure shown in Figure 2, in the joint arm that present embodiment provides, its antetheca 310 forms by four bendings, does not need more times bending to form arc structure, and then under can the apply to Section arm left and right sides width less situation of this structure, and then the joint arm of this structure has bigger Applicable scope.In addition, compare with arc structure, guaranteeing under the essentially identical situation of intensity that antetheca 310 profiles are constant substantially, antetheca 310 produces, perimeter of section is littler, and then be conducive to reduce material consumption, reduce joint arm weight, for the weight that reduces telescopic boom provides good prerequisite.
Please refer to Fig. 4, among the embodiment provided by the invention, this joint arm can be surrounded (among the embodiment, by 7 bending and moldings) by a sheet material bending.What its bending formed can be fixedly linked by welding in conjunction with limit J, forms a complete tubular structure.With by two or more the joint arm that is combined into of multi-sheets material compare, on the one hand, the side face of the joint arm of this structure only has weld seam one, and then is conducive to guarantee to save the build guality of arm, improves the reliability of joint arm; On the other hand, can be conducive to improve the stability of joint arm so that the bulk strength of joint arm significantly improves, further reduce the side sway phenomenon of joint arm.Certainly, the joint arm that provides of the embodiment of the invention also can have the multi-sheets material to be combined into.
Position in conjunction with limit J can be determined according to actual needs; Such as, can be positioned on left wall 320 and/or the right wall in conjunction with limit J, the left-right symmetric face P(Fig. 4 that also can be arranged in the joint arm illustrates with long and two-short dash line) on.When being located on the left-right symmetric face P in conjunction with limit J, preferably make in conjunction with limit J to be arranged in antetheca 310 simultaneously, stress is pressure herein, and the position of weld has bigger pressure resistance, and then guarantee joint arm bulk strength, reduce to weld the adverse effect to joint arm intensity simultaneously better.
According to foregoing description, be appreciated that saving arm each several part size can determine according to actual needs; Wherein, four bending sides 311 of antetheca 310,312,313,314 width can equate, also can be unequal.Please refer to Fig. 5, this figure is I-I part-structure scheme drawing among Fig. 4.Be located in the antetheca 310, the bending side 311 that links to each other with left wall 320 is first bending side (with 311 indications), and the bending side 312 that links to each other with first bending side 311 is second bending side (with 312 indications); Among the embodiment, width W 2 that can second bending side 312 is greater than the width W 1 of first bending side 311; Can improve the intensity of the left and right directions of antetheca 310 like this, utilize the intensity of the fore-and-aft direction that left wall 320 and right wall 340 provide more fully, and then can be on the basis that guarantees joint arm bulk strength, improve the intensity on the left and right directions that saves arm, for the side sway phenomenon that reduces the joint arm provides favourable prerequisite.Among the embodiment, the width W 2 of second bending side 312 can be 1.3～1.5 times of width W 1 of first bending side 311.
On the basis that above-mentioned joint arm is provided, the embodiment of the invention also provides a kind of telescopic boom of hoisting crane, and this flexible wall comprises the joint arm of a plurality of inside and outside suits, and the joint arm can be the joint arm of above-mentioned any hoisting crane.Based on above-mentioned joint arm, the telescopic boom that this embodiment provides also has corresponding technique effect, does not repeat them here.Further, between inside and outside two adjacent joint arms at least 6 slide block (not shown)s can be set; Slide block all can link to each other with the internal face of the joint arm of outside; Wherein, four bending sides 311,312,313,314 bearing fits that at least four slide blocks are formed with the antetheca 310 of the joint arm of inside respectively; Two bending sides 331,332 bearing fits that at least two slide blocks are formed with the rear wall 330 of the joint arm of inside respectively.Like this, can between two adjacent joint arms, form the more strong point.
Providing on the basis of above-mentioned telescopic boom, the embodiment of the invention also provides a kind of hoisting crane, and this hoisting crane comprises body and the telescopic boom that is installed on the body, and telescopic boom can be the telescopic boom of above-mentioned any hoisting crane.Based on above-mentioned telescopic boom, the hoisting crane that this embodiment provides also has corresponding technique effect, does not repeat them here.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the joint arm of a hoisting crane comprises antetheca (310), left wall (320), rear wall (330) He Youbi (340), it is characterized in that, described antetheca (310) and rear wall (330) all form folding face structure evagination, symmetrical; Described antetheca (310) forms four bending sides, and described rear wall (330) forms two bending sides.
2. the joint arm of hoisting crane according to claim 1 is characterized in that, is surrounded being fixedly linked by welding in conjunction with limit (J) of formation by a sheet material bending.
3. the joint arm of hoisting crane according to claim 2 is characterized in that, on the described left-right symmetric face (P) that is positioned at described joint arm in conjunction with limit (J).
4. the joint arm of hoisting crane according to claim 3 is characterized in that, describedly is arranged in described antetheca (310) in conjunction with limit (J).
5. according to the joint arm of each described hoisting crane of claim 1-4, it is characterized in that the width of four bending sides of described antetheca (310) equates.
6. according to the joint arm of each described hoisting crane of claim 1-4, it is characterized in that, in the described antetheca (310), the bending side (311) that links to each other with described left wall (320) is first bending side (311), and the bending side (312) that links to each other with described first bending side (311) is second bending side (312); The width (W2) of described second bending side (312) is greater than the width (W1) of described first bending side (311).
7. the joint arm of hoisting crane according to claim 6 is characterized in that, the width (W2) of described second bending side (312) is 1.3～1.5 times of width (W1) of described first bending side (311).
8. the telescopic boom of a hoisting crane comprises it is characterized in that the joint arm of a plurality of inside and outside suits, and described joint arm is the joint arm of claim 1 any described hoisting crane to the claim 7.
9. the telescopic boom of hoisting crane according to claim 8 is characterized in that, between inside and outside two adjacent joint arms at least 6 slide blocks is set; Described slide block all links to each other with the internal face of the described joint arm of outside; Four bending side bearing fits that at least four described slide blocks form with the antetheca (310) of the described joint arm of inside respectively; Two bending side bearing fits that at least two described slide blocks form with the rear wall (330) of the described joint arm of inside respectively.
10. a hoisting crane comprises body and the telescopic boom that is installed on the described body, it is characterized in that described telescopic boom is the telescopic boom of claim 8 or 9 described hoisting cranes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101634832A CN103241663A (en) | 2013-05-07 | 2013-05-07 | Crane, and telescopic arm and knuckle arm thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101634832A CN103241663A (en) | 2013-05-07 | 2013-05-07 | Crane, and telescopic arm and knuckle arm thereof |
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| Publication Number | Publication Date |
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| CN103241663A true CN103241663A (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101634832A Pending CN103241663A (en) | 2013-05-07 | 2013-05-07 | Crane, and telescopic arm and knuckle arm thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105584943A (en) * | 2016-01-15 | 2016-05-18 | 三一帕尔菲格特种车辆装备有限公司 | Crane boom and crane |
| CN110733979A (en) * | 2019-11-19 | 2020-01-31 | 姚运文 | Upper side light load single welding seam crane boom |
| CN111390498A (en) * | 2020-03-11 | 2020-07-10 | 武汉理工大学 | Lightweight operation vehicle arm and forming method |
| CN111498758A (en) * | 2020-04-09 | 2020-08-07 | 中联重科股份有限公司 | U-shaped boom assembly, U-shaped boom and aerial working equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105584943A (en) * | 2016-01-15 | 2016-05-18 | 三一帕尔菲格特种车辆装备有限公司 | Crane boom and crane |
| CN110733979A (en) * | 2019-11-19 | 2020-01-31 | 姚运文 | Upper side light load single welding seam crane boom |
| CN111390498A (en) * | 2020-03-11 | 2020-07-10 | 武汉理工大学 | Lightweight operation vehicle arm and forming method |
| CN111498758A (en) * | 2020-04-09 | 2020-08-07 | 中联重科股份有限公司 | U-shaped boom assembly, U-shaped boom and aerial working equipment |
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Application publication date: 20130814 |