CN212050283U - Automobile crane anti-deformation supporting leg mechanism - Google Patents
Automobile crane anti-deformation supporting leg mechanism Download PDFInfo
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- CN212050283U CN212050283U CN202020800673.6U CN202020800673U CN212050283U CN 212050283 U CN212050283 U CN 212050283U CN 202020800673 U CN202020800673 U CN 202020800673U CN 212050283 U CN212050283 U CN 212050283U
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- cover plate
- upper cover
- landing leg
- downside
- leg
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Abstract
The utility model provides an automobile crane anti-deformation landing leg mechanism, including the landing leg case, activity landing leg and perpendicular hydro-cylinder, be equipped with on the landing leg case and hold the chamber, the activity landing leg includes the upper cover plate, lower cover plate and two webs, activity landing leg front side is equipped with preceding shrouding, the upper cover plate level is arranged, the upper cover plate rear side is equipped with a decurrent rake, the rake upside is equipped with the cushion, web downside border its length direction is the arc of indent, the downside height that the lower cover plate is not less than the web is highly down, lower cover plate rear side below is equipped with a horizontal backing plate, the backing plate downside surpasss the web downside, it is H1 to establish the upper cover plate upside and the backing plate downside along the vertical distance, the upper cover plate upside is H2 with web downside front end along the vertical distance, fixed landing leg case front side opening is H3 along the vertical height, satisfy H1> H. The mechanism adopts a variable cross-section structure in the length direction of the movable supporting leg, and resists deformation by utilizing the interference effect generated by the rear part of the supporting leg and the opening of the supporting leg box.
Description
Technical Field
The utility model relates to a mobile crane anti-deformation landing leg mechanism.
Background
The movable support leg is one of main bearing structural members of the automobile crane, and the performance of the movable support leg is directly related to the reliability and the operation safety of the whole crane. Referring to fig. 1 and 2, the conventional support leg structure of the automobile crane is a rectangular beam type structure, the support leg structure is in clearance fit with a fixed support leg box 1, and the vertical clearance between a movable support leg 2 and the fixed support leg box 1 is 5-10mm due to manufacturing errors. After the movable supporting leg 2 is fully extended, the two ends of the movable supporting leg 2 of the whole crane can obviously upwarp under the action of gravity, and when the crane performs hoisting operation, the vertical oil cylinder 3 bears extra bending moment due to the fact that the movable supporting leg 2 upwarps seriously, so that the stability of a cylinder rod is reduced. In addition, the supporting height of the whole crane is reduced due to the fact that the two ends of the movable supporting legs 2 are upwarped, tires of the crane cannot lift off the ground, and operation safety is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an automobile crane anti-deformation landing leg mechanism is provided, adopts variable cross section structure at activity landing leg length direction to utilize activity landing leg rear portion and landing leg case opening part to produce the deformation that the interference effect resisted the production.
The utility model provides a reverse deformation support leg mechanism of an automobile crane, which comprises a fixed support leg box, a movable support leg and a vertical oil cylinder arranged at the front end of the movable support leg, wherein the fixed support leg box is provided with a front opening and a containing cavity for containing the movable support leg, the movable support leg comprises an upper cover plate, a lower cover plate and two webs, the upper cover plate and the lower cover plate are arranged up and down, the two webs are respectively arranged at the left side and the right side of the upper cover plate and the lower cover plate, the upper cover plate, the lower cover plate and the two webs are mutually connected to form a square tube body, the front side of the movable support leg is provided with a vertically arranged front closing plate which is connected with the upper cover plate, the lower cover plate and the two webs, the upper cover plate is horizontally arranged, the rear side of the upper cover plate is provided with a downward inclined part, the upper side of the inclined part is provided with, a horizontal base plate is arranged below the rear side of the lower cover plate, the lower side of the base plate exceeds the lower side of the web plate, the distance between the upper side of the upper cover plate and the lower side of the base plate in the vertical direction is H1, the distance between the upper side of the upper cover plate and the lower side of the web plate in the vertical direction is H2, the opening of the front end of the fixed leg box in the vertical direction is H3, and H1> H3> H2 is met.
Preferably, the difference between H1 and H3 is 2-4 mm.
For the sake of simple explanation, the following is the present mechanism for reverse deformation of the support leg mechanism of the present invention.
The using state of the mechanism is as follows: when the automobile crane runs, the movable supporting legs are stored in the supporting leg box, the movable supporting legs extend out of the supporting leg box during use, the lower side of the web plate is equivalent to a guide edge, the front side of the movable supporting legs in the process is in a sinking trend, the vertical direction of the upper cover plate and the opening upper side of the supporting leg box is increased and then decreased until the movable supporting legs completely extend out (a certain gap is maintained all the time), the frame is lifted by the vertical oil cylinder at the moment, the movable supporting legs in the process can rotate by taking the base plate as a fulcrum, and the whole machine is supported until the upper cover plate and the opening upper side of the supporting leg. Because H1> H3, the interference effect is produced with the landing leg case opening part to the activity landing leg, and the activity landing leg can produce the downwarping trend promptly, and during the suspension operation, the activity landing leg receives the atress and produces ascending bending deformation, and the downwarping volume Hb that reverse deformation produced at this moment can offset the bending deformation volume of activity landing leg, makes the activity landing leg can keep the level at any time when the atress, has improved the atress of vertical cylinder simultaneously in the stability of operation.
The advantages of the mechanism are that: the movable supporting leg in the mechanism adopts a variable cross-section structure, and the deformation generated by interference effect generated by the rear part of the movable supporting leg and the opening of the supporting leg box is utilized to resist, so that the constant-strength theory is more met when the movable supporting leg is stressed, and the stress of the movable supporting leg is more reasonable.
Drawings
Fig. 1 is a schematic structural view of a movable leg in an extended state in the prior art.
Fig. 2 shows the deformation of the movable support leg during the suspension operation in the prior art.
Fig. 3 is a schematic structural view of a movable leg in the mechanism.
Fig. 4 is an assembly schematic of the mechanism.
Fig. 5 is a schematic view of the mechanism in use (with the movable leg fully retracted).
Fig. 6 is a schematic view showing the state of use of the mechanism (the state during the extension of the movable leg).
Fig. 7 is a schematic view of the mechanism in use (fully extended state of the movable leg).
Fig. 8 is a schematic view showing a use state of the mechanism (a state in which the movable leg is suspended and loaded).
Detailed Description
Referring to fig. 3-8, an automobile crane reversible deformation support leg mechanism comprises a fixed support leg box 1, a movable support leg 2 and a vertical oil cylinder installed at the front end of the movable support leg 2, wherein the fixed support leg box 1 is provided with a front side opening and a containing cavity 11 for containing the movable support leg 2, the movable support leg 2 comprises an upper cover plate 21, a lower cover plate 22 and two webs 23, the upper cover plate 21 and the lower cover plate 22 are arranged up and down, the two webs 23 are respectively arranged at the left side and the right side of the upper cover plate 21 and the lower cover plate 22, the upper cover plate 21, the lower cover plate 22 and the two webs 23 are connected with each other to form a square pipe body, the front side of the movable support leg 2 is provided with a front closing plate 24 which is vertically arranged and is connected with the upper cover plate 21, the lower cover plate 22 and the two webs 23, the upper cover plate 21 is horizontally arranged, the rear side of the upper cover plate 21 is provided, the height of the lower side of the lower cover plate 22 is not lower than that of the lower side of the web plate 23, a horizontal base plate 221 is arranged below the rear side of the lower cover plate 22, the lower side of the base plate 221 exceeds the lower side of the web plate 23, the vertical distance between the upper side of the upper cover plate 21 and the lower side of the base plate 221 is H1, the vertical distance between the upper side of the upper cover plate 21 and the front end of the lower side of the web plate 23 is H2, the vertical height of the front opening of the fixed leg box 1 is H3, and H1, H3 and H2 are met. The difference between H1 and H3 is 2-4 mm.
The using state of the mechanism is as follows: when the automobile crane runs, the movable supporting leg 2 is stored in the supporting leg box 1, the movable supporting leg 2 extends out of the supporting leg box 1 during use, the lower side of the web plate 23 is equivalent to a guide edge at the moment, the front side of the movable supporting leg 2 in the process is in a sinking trend, the vertical distance between the upper cover plate 21 and the opening upper side of the supporting leg box 1 is increased and then decreased, the movable supporting leg 2 extends out completely (a certain gap is maintained all the time), the frame is lifted by the extension of the vertical oil cylinder at the moment, the movable supporting leg 2 in the process can rotate by taking the base plate 221 as a pivot, and the whole machine is supported by the upper cover plate 21 and the opening upper side. Because H1> H3, the interference effect is generated between the movable supporting leg 2 and the opening of the supporting leg box 1, the interference magnitude is 2-4mm, namely the movable supporting leg 2 can generate a downwarping trend, when in hoisting operation, the movable supporting leg 2 receives force to generate upward bending deformation, and the downwarping magnitude Hb generated by reverse deformation can offset the bending deformation magnitude of the movable supporting leg 2, so that the movable supporting leg 2 can be kept horizontal when being stressed, the stability in operation is improved, and the stress of the vertical oil cylinder is improved.
The advantages of the mechanism are that: the movable supporting leg 2 in the mechanism adopts a variable cross-section structure, and the deformation generated by interference effect generated by the rear part of the movable supporting leg 2 and the opening of the supporting leg box 1 is resisted, so that the constant-strength theory is more met when the movable supporting leg 2 is stressed, and the stress of the movable supporting leg 2 is more reasonable.
Claims (2)
1. The utility model provides an automobile crane anti-deformation landing leg mechanism, including fixed leg case, the activity landing leg with install the perpendicular hydro-cylinder at the activity landing leg front end, be equipped with a front side opening on the fixed leg case, a chamber that holds for holding the activity landing leg, the activity landing leg includes the upper cover plate, lower apron and two webs, the upper cover plate, arrange from top to bottom down the apron, the upper cover plate is located respectively to two webs, the left and right sides of apron down, the upper cover plate, apron and two webs interconnect constitute a side body down, the activity landing leg front side is equipped with a vertical arrangement and connects the upper cover plate, the preceding shrouding of apron and two webs down, its characterized in that: the upper cover plate level is arranged, the upper cover plate rear side is equipped with a decurrent rake, the rake upside is equipped with the cushion, web downside border is the arc of indent along its length direction, the downside height of lower apron is not less than the downside height of web, lower cover plate rear side below is equipped with a horizontal backing plate, the backing plate downside surpasss the web downside, it is H1 to establish upper cover plate upside and backing plate downside along the distance of vertical direction, the upper cover plate upside is H2 with web downside front end along the distance of vertical direction, fixed landing leg case front end opening is H3 along the height of vertical direction, satisfy H1> H3> H2.
2. The automobile crane reversible deformation leg mechanism as claimed in claim 1, wherein: the difference between H1 and H3 is 2-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020800673.6U CN212050283U (en) | 2020-05-14 | 2020-05-14 | Automobile crane anti-deformation supporting leg mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020800673.6U CN212050283U (en) | 2020-05-14 | 2020-05-14 | Automobile crane anti-deformation supporting leg mechanism |
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| Publication Number | Publication Date |
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| CN212050283U true CN212050283U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020800673.6U Active CN212050283U (en) | 2020-05-14 | 2020-05-14 | Automobile crane anti-deformation supporting leg mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501449A (en) * | 2021-07-30 | 2021-10-15 | 湖南三一中型起重机械有限公司 | Work machine and work machine leg assembly |
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2020
- 2020-05-14 CN CN202020800673.6U patent/CN212050283U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501449A (en) * | 2021-07-30 | 2021-10-15 | 湖南三一中型起重机械有限公司 | Work machine and work machine leg assembly |
| CN113501449B (en) * | 2021-07-30 | 2023-05-09 | 湖南三一中型起重机械有限公司 | Work machine and work machine leg assembly |
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