CN203295085U - Crane, telescopic arm of crane and knuckle arms of crane - Google Patents
Crane, telescopic arm of crane and knuckle arms of crane Download PDFInfo
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- CN203295085U CN203295085U CN2013202422117U CN201320242211U CN203295085U CN 203295085 U CN203295085 U CN 203295085U CN 2013202422117 U CN2013202422117 U CN 2013202422117U CN 201320242211 U CN201320242211 U CN 201320242211U CN 203295085 U CN203295085 U CN 203295085U
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- antetheca
- hoisting crane
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Abstract
The utility model discloses a crane, a telescopic arm of the crane and knuckle arms of the crane. For each knuckle arm of the crane, the front wall and the rear wall form a eudipleural structure, so that the strength in the left direction and the strength in the right direction are basically equal, and the basic stability of the knuckle arms is guaranteed; a convex bending surface structure and two bending surfaces are formed on the rear wall, thus, under the condition that the perimeter of the section of each knuckle arm is not changed, the section modulus of each knuckle arm can be increased, then anti-bending, anti-torque and compression-resistant strength of each knuckle arm can be improved, the stability of each knuckle arm is improved, and the sidewise bending phenomenon of each knuckle arm is reduced; and meanwhile, four bending surfaces are formed on the front wall, so that compared with the conventional structure with two bending surfaces, the structure further can increase the section modulus of each knuckle arm, improves the strength and the stability of each knuckle arm and reduces the sidewise bending phenomenon of each knuckle arm.
Description
Technical field
The utility model relates to the hoisting crane technology, and 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 arranged on 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 arms, between inside and outside adjacent joint arm, slide block can be set.Slide block can be connected 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 schematic diagram that saves arm; For convenience, in each accompanying drawing of presents, arrow B is oriented to rear, and arrow F is oriented to the place ahead.This joint arm is spliced to form by rear steel plate 100 and front spring 200; Rear 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 rear steel plate 100 and front spring 200 is in conjunction with forming Zuo Bi and You Bi, and at the W place, is weldingly connected.The antetheca of this joint arm forms the folding face structure of evagination, comprises symmetrical two bending sides 201,202.While 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 schematic diagram 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, general in the situation that the side-to-side dimensions of joint arm is larger, 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 inside and outside adjacent joint arm, reduces stress and concentrates.
In actual use, existing joint arm is easy to occur the side sway phenomenon, and stability is lower, and then causes telescopic boom shorter service life.Although can increase the stability of joint arm by the joint of the steel plate manufacturing with thicker arm, this causes again material consumption to increase, and 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 substantially constant, improving joint arm stability was the technical barrier that current those skilled in the art need to solve.
The utility model content
In view of this, the utility model provides a kind of joint arm of hoisting crane, and this joint arm can when keeping material consumption substantially constant, improve the stability of joint arm.
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, formation connected by being welded and fixed in conjunction with limit.
Optionally, on the described left-right symmetric face that is positioned at described joint arm in conjunction with limit.
Optionally, describedly in conjunction with limit, be arranged in described antetheca.
Optionally, the width of four of described antetheca bending sides equates.
Optionally, in described antetheca, the bending side that is connected with described left wall is the first bending side, and the bending side that is connected with described the first bending side is the second bending side; The width of described the second bending side is greater than the width of described the first bending side.
Optionally, the width of described the second bending side is 1.3～1.5 times of width of described the 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 is connected 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 arranged on described body, and described telescopic boom is the telescopic boom of above-mentioned any hoisting crane.
In the joint arm of the hoisting crane that the utility model provides, antetheca and rear wall form symmetrical structure, can guarantee that left and right directions intensity is substantially equal, guarantee the basicly stable of joint arm.Form the folding face structure of evagination due to rear wall, and rear wall forms two bending sides.Like this, in the situation that keep joint arm perimeter of section constant, 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, with the structure of two bending sides of existing formation, compares, and this structure also can improve the section modulus that increases the joint arm, is conducive to improve joint arm strength 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 plate material, and by welding manner, makes in conjunction with limit and be fixedly linked.Compare with the joint arm that is combined into by the plurality of plates material, on the one hand, because joint arm side face only has weld seam one, and then be 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 limit, and be arranged in described antetheca, make in conjunction with limit and be positioned at the less position of stress, can reduce better to weld the adverse effect to joint arm intensity.
In further technical scheme, in described antetheca, the bending side that is connected with described left wall is the first bending side, and the bending side that is connected with described the first bending side is the second bending side; The width of described the second bending side is greater than the width of described the first bending side.Can improve the intensity of the left and right directions of antetheca like this, utilize more fully the intensity of the fore-and-aft direction that Zuo Bi and You Bi provide, and then can improve the intensity on the left and right directions that saves arm on the basis that guarantees joint arm bulk strength, 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 forms 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 form improper restriction of the present utility model.
Fig. 1 is known a kind of cross section structure schematic diagram that saves arm;
Fig. 2 is the cross section structure schematic diagram that known another kind saves arm;
Fig. 3 is the Force principle schematic diagram of telescopic crane boom;
A kind of cross section structure schematic diagram that saves arm that Fig. 4 provides for the utility model embodiment;
Fig. 5 is I-I part-structure schematic diagram in Fig. 4.
In 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 background technology, the applicant studies the stressing conditions of telescopic boom and joint arm.Please refer to Fig. 3, this figure is the Force principle schematic diagram of telescopic boom; This illustrates first segment arm 10, second section arm 20 and the 3rd joint arm 30 that ecto-entad sequentially is set with.Under the effect of load G, for second section arm 20, the antetheca bearing fit of its antetheca and the 3rd joint arm 30, the inside face of rear wall is subject to the application force of the rear wall of the 3rd joint arm 30 towards outside, simultaneously, the outside face of second section arm 20 rear walls is subject to the application force of the inside face of first segment arm 10 rear walls towards inside; And then, can determine that the rear wall of second section arm 20 is subject 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 utility model proposes the technical scheme of improving the joint arm configuration, to solve above-mentioned technical barrier.
Below embodiment that the utility model is provided be described.Need to prove, in the situation that do not conflict, embodiment and the feature in 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.
Please refer to Fig. 4, this figure is a kind of cross section structure schematic diagram that saves arm that the utility model embodiment provides; In figure, arrow B is oriented to 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 like this joint arm left and right stability.Simultaneously, antetheca 310 and rear wall 330 all form the folding face structure of evagination, can improve like this rigidity of joint arm.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, in the situation that the maintenance perimeter of section is constant, has stronger stability, can reduce the side sway phenomenon of joint arm.
It has stronger stability reasons, and the applicant thinks: form the folding face structure of evagination due to rear wall 330, and rear wall 330 forms two bending sides 331,332; In the situation that keep joint arm perimeter of section constant, 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, with the structure of two bending sides of existing formation, compare, 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 strength 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, can increase like this strong point of interior acromere arm, reduce stress and concentrate.While contrasting joint arm that the utility model embodiment provides with the arm of joint shown in Fig. 1 (perimeter of section, plate material thickness all equate, 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 forming a plurality of strong points, can improve reliability and the flexible stability of bearing fit between interior acromere arm.
Compare with structure shown in Figure 2, in the joint arm that the 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 width less situation of this structure, and then the joint arm of this structure has larger Applicable scope.In addition, with arc structure, compare, guaranteeing in the essentially identical situation of intensity that antetheca 310 profiles are substantially constant, antetheca 310 produces, perimeter of section is less, 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, in the embodiment that the utility model provides, this joint arm can be surrounded by a sheet material bending (in embodiment, by 7 bending and moldings).What its bending formed can be connected by being welded and fixed in conjunction with limit J, forms a complete tubular structure.With by two or more the joint arm that is combined into of plurality of plates 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 utility model embodiment also can have the plurality of plates 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 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.While in conjunction with limit J, being located on left-right symmetric face P, preferably make in conjunction with limit J and be arranged in simultaneously antetheca 310, stress is pressure herein, and position of weld has larger pressure resistance, and then guarantee joint arm bulk strength, reduce better to weld the adverse effect to joint arm intensity simultaneously.
, 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 schematic diagram in Fig. 4.Be located in antetheca 310, the bending side 311 that is connected with left wall 320 is the first bending side (with 311 indications), and the bending side 312 that is connected with the first bending side 311 is the second bending side (with 312 indications); In an embodiment, width W 2 that can the second bending side 312 is greater than the width W 1 of the first bending side 311; Can improve the intensity of the left and right directions of antetheca 310 like this, utilize more fully the intensity of the fore-and-aft direction that left wall 320 and right wall 340 provide, 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.In embodiment, the width W 2 of the second bending side 312 can be 1.3～1.5 times of width W 1 of the first bending side 311.
On the basis that above-mentioned joint arm is provided, the utility model embodiment 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 be connected with the internal face of the joint arm of outside; Four bending sides 311,312,313,314 bearing fits that wherein, 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 form the more strong point between two adjacent joint arms.
Providing on the basis of above-mentioned telescopic boom, the utility model embodiment also provides a kind of hoisting crane, and this hoisting crane comprises body and the telescopic boom that is arranged on 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 foregoing is only 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., within all should being included in protection domain of the present utility model.
Claims (10)
1. the joint arm of a hoisting crane, comprise 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, surrounded formation connected by being welded and fixed in conjunction with limit (J) 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 in conjunction with limit (J), is arranged in described antetheca (310).
5. the joint arm of according to claim 1-4 described hoisting cranes of any one, is characterized in that, the width of four bending sides of described antetheca (310) equates.
6. the joint arm of according to claim 1-4 described hoisting cranes of any one, it is characterized in that, in described antetheca (310), the bending side (311) that is connected with described left wall (320) is the first bending side (311), and the bending side (312) that is connected with described the first bending side (311) is the second bending side (312); The width (W2) of described the second bending side (312) is greater than the width (W1) of described the first bending side (311).
7. the joint arm of hoisting crane according to claim 6, is characterized in that, the width (W2) of described the second bending side (312) is 1.3～1.5 times of width (W1) of described the first bending side (311).
8. the telescopic boom of a hoisting crane, comprise and it is characterized in that the joint arms of a plurality of inside and outside suits, and described joint arm is the joint arm of claim 1 to any described hoisting crane in 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 is connected 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, comprise body and the telescopic boom that is arranged on 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 |
|---|---|---|---|
| CN2013202422117U CN203295085U (en) | 2013-05-07 | 2013-05-07 | Crane, telescopic arm of crane and knuckle arms of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202422117U CN203295085U (en) | 2013-05-07 | 2013-05-07 | Crane, telescopic arm of crane and knuckle arms of crane |
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| Publication Number | Publication Date |
|---|---|
| CN203295085U true CN203295085U (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202422117U Expired - Lifetime CN203295085U (en) | 2013-05-07 | 2013-05-07 | Crane, telescopic arm of crane and knuckle arms of crane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241663A (en) * | 2013-05-07 | 2013-08-14 | 三一帕尔菲格特种车辆装备有限公司 | Crane, and telescopic arm and knuckle arm thereof |
| CN111377366A (en) * | 2018-12-30 | 2020-07-07 | 河南森源重工有限公司 | U-shaped arm body, U-shaped arm body forming method and crane boom |
-
2013
- 2013-05-07 CN CN2013202422117U patent/CN203295085U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241663A (en) * | 2013-05-07 | 2013-08-14 | 三一帕尔菲格特种车辆装备有限公司 | Crane, and telescopic arm and knuckle arm thereof |
| CN111377366A (en) * | 2018-12-30 | 2020-07-07 | 河南森源重工有限公司 | U-shaped arm body, U-shaped arm body forming method and crane boom |
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Granted publication date: 20131120 |
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