CN216946105U - Coaxiality-adjustable arm support and overhead working truck - Google Patents

Abstract

The utility model provides a coaxiality-adjustable arm support and an aerial work vehicle, and relates to the technical field of aerial work vehicles. The arm support with the adjustable coaxiality comprises a plurality of arm supports, wherein each arm support is of a cylindrical structure, each arm support is sequentially nested, and a plurality of limiting bulges are arranged on the outer surfaces of the lower ends of the other arm supports except the arm support on the outermost side at intervals; a plurality of active adjusting mechanisms are arranged at intervals at the upper end edges of other arm frames except the innermost arm frame; the active adjusting mechanism comprises an assembling seat, an adjusting rod and a limiting end, the assembling seat is arranged at the edge position of the upper ends of other arm supports except the innermost arm support, the adjusting rod can move relative to the assembling seat, and the adjusting rod moves to enable the limiting end to be in contact with or separated from the outer surface of the adjacent inner arm support. The coaxiality-adjustable arm support is applied to an overhead working truck to realize the coaxiality adjustment of the multi-stage arm support.

Description

Coaxiality-adjustable arm support and overhead working truck

Technical Field

The utility model relates to the technical field of overhead working trucks, in particular to a coaxiality-adjustable arm support and an overhead working truck.

Background

The overhead working truck is a special vehicle for transporting workers and equipment to carry out overhead operation. The aerial work platform is arranged at the tail end of the arm support, the working platform is transferred to an aerial work area after the arm support is extended and lifted, and the working platform is reset after the arm support is retracted and falls. The arm support of the high-altitude operation vehicle is of a multi-stage nested structure, the multi-stage arm support is important for the high-altitude operation vehicle to keep high coaxiality, and especially when the extension length of the arm support reaches nearly 40m, if the multi-stage arm support cannot keep high coaxiality, the whole arm support is prone to being inclined, and normal use and safety of the high-altitude operation vehicle are affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a coaxiality-adjustable arm support so as to realize the coaxiality adjustment of a multi-stage arm support.

In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

an arm support with adjustable coaxiality comprises a plurality of arm supports, wherein each arm support is of a cylindrical structure, the arm supports are sequentially nested and arranged,

the outer surfaces of the lower ends of other arm supports except the outermost arm support are provided with a plurality of limiting bulges at intervals;

a plurality of active adjusting mechanisms are arranged at intervals at the upper end edges of other arm frames except the innermost arm frame;

the active adjusting mechanism comprises an assembling seat, an adjusting rod and a limiting end, the assembling seat is arranged at the edge position of the upper ends of other arm supports except the innermost arm support, the adjusting rod can move relative to the assembling seat, and the adjusting rod moves to enable the limiting end to be in contact with or separated from the outer surface of the adjacent inner arm support.

Preferably, the upper end edge of at least one arm support is not coplanar, and the plurality of active adjusting mechanisms are not all located on the same cross section of the arm support.

Preferably, the upper end edge of the arm support is provided with a plane and an inclined plane, and the active adjusting mechanism is arranged on the plane and the inclined plane.

Preferably, the active adjusting mechanisms on at least one arm support are positioned on three cross sections or two cross sections of the arm support.

Preferably, the plurality of active adjusting mechanisms on the arm support on the secondary inner side are positioned on the same cross section of the arm support.

Preferably, the limiting end is a limiting block, and the limiting block is connected with the assembling seat in a sliding mode.

Preferably, the limiting end is arranged at the tail end of the adjusting rod.

Preferably, the limiting protrusions include fixed limiting protrusions and movable limiting protrusions, the fixed limiting protrusions are fixedly connected to the outer surfaces of the lower ends of the other arm supports except the arm support on the outermost side, the movable limiting protrusions are movably connected to the outer surfaces of the lower ends of the other arm supports except the arm support on the outermost side, and the protruding heights of the movable limiting protrusions relative to the arm support are adjustable.

Preferably, the cross section of each arm support is an octagon which is symmetrically arranged.

The utility model also provides an overhead working truck which comprises a truck chassis, wherein the truck chassis is provided with the coaxiality-adjustable arm support.

The beneficial technical effects of the utility model are as follows:

when the arm support with the adjustable coaxiality is applied to an overhead working truck, when the multistage arm support stretches relatively, the limiting bulge on the outer surface of the lower end of the inner arm support slides relative to the inner surface of the outer arm support, and the limiting bulge is a wearing part, so that the problem that the assembly coaxiality between the adjacent arm supports is difficult to maintain due to direct friction wearing between the arm supports is avoided; the active adjusting mechanism at the edge position of the upper end of the outer arm support can be adjusted at any time, the outer arm support and the inner arm support are adjusted to keep higher coaxiality, and therefore all levels of arm supports are adjusted to be higher in coaxiality; the lower end of the arm support is provided with a limiting bulge, the upper end of the arm support is provided with an active adjusting mechanism, and the active adjusting mechanism is used for ensuring good stability when the multi-stage arm support is relatively stretched and retracted while realizing coaxiality adjustment, so that adjacent arm supports are not shaken; in addition, the active adjusting mechanisms are not all located on the same cross section of the arm support, so that the coaxiality of the adjacent arm supports is adjusted and supported on the cross sections along the axial direction of the arm support, and the adjusting effect is better.

Drawings

Fig. 1 is a perspective view of a boom with adjustable coaxiality according to an embodiment of the present invention;

fig. 2 is a front view of an arm support with adjustable coaxiality according to an embodiment of the utility model;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a front view of a first stage boom in a boom with an adjustable coaxiality according to an embodiment of the present invention;

fig. 5 is a front view of a second stage boom in the boom with adjustable coaxiality according to the embodiment of the present invention;

fig. 6 is a front view of a third stage arm support in the arm support with adjustable coaxiality according to the embodiment of the utility model;

fig. 7 is a front view of a fourth stage arm support in the arm support with adjustable coaxiality according to the embodiment of the utility model;

fig. 8 is a front view of a fifth-stage boom in the boom with adjustable coaxiality according to the embodiment of the present invention;

fig. 9 is a front view of a sixth stage arm support in the arm support with adjustable coaxiality according to the embodiment of the present invention;

fig. 10 is a front view of a seventh stage arm support in the arm support with adjustable coaxiality according to the embodiment of the present invention;

fig. 11 is a top perspective view of an active adjustment mechanism in a coaxiality-adjustable boom according to an embodiment of the present invention;

fig. 12 is a sectional view taken along line B-B in fig. 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings in combination with the specific embodiments. Certain embodiments of the utility model now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. Indeed, various embodiments of the utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In an embodiment of the present invention, a cantilever with adjustable coaxiality is provided, please refer to fig. 1 to 12.

An arm support with adjustable coaxiality comprises a plurality of arm supports, specifically a first-stage arm support 11, a second-stage arm support 12, a third-stage arm support 13, a fourth-stage arm support 14, a fifth-stage arm support 15, a sixth-stage arm support 16 and a seventh-stage arm support 17, wherein each arm support is of a cylindrical structure, and the arm supports are sequentially arranged in a nested manner, wherein the first-stage arm support 11 is the arm support on the outermost side, and the seventh-stage arm support 17 is the arm support on the innermost side. The lower end of the first-stage arm support 11 is used for being connected with a chassis, the upper end of the seventh-stage arm support 17 is used for being connected with an arm support connecting rod 4, a platform base 5 is arranged on the arm support connecting rod 4, and the platform base 5 is used for assembling a working platform. The cross section of each arm support is in a symmetrical octagon shape so as to realize limiting and guiding when the adjacent arm supports slide relatively, so that the adjacent arm supports keep high coaxiality under dynamic conditions, and the adjacent arm supports are prevented from being staggered along the circumferential direction.

The outer surfaces of the lower ends of other arm frames (a second-stage arm frame 12, a third-stage arm frame 13, a fourth-stage arm frame 14, a fifth-stage arm frame 15, a sixth-stage arm frame 16 and a seventh-stage arm frame 17) except the outermost arm frame (a first-stage arm frame 11) are provided with a plurality of limiting bulges at intervals.

The limiting protrusions comprise fixed limiting protrusions 21 and movable limiting protrusions 22, the fixed limiting protrusions 21 are of block-shaped structures, and the fixed limiting protrusions 21 are fixedly connected to the outer surfaces of the lower ends of the other arm frames (the second-stage arm frame 12, the third-stage arm frame 13, the fourth-stage arm frame 14, the fifth-stage arm frame 15, the sixth-stage arm frame 16 and the seventh-stage arm frame 17) except the outermost arm frame (the first-stage arm frame 11) in a rivet or welding mode. The movable limiting bulge 22 is movably connected to the outer surfaces of the lower ends of other arm frames (a second-stage arm frame 12, a third-stage arm frame 13, a fourth-stage arm frame 14, a fifth-stage arm frame 15, a sixth-stage arm frame 16 and a seventh-stage arm frame 17) except for the arm frame (a first-stage arm frame 11) on the outermost side, and the protruding height of the movable limiting bulge 22 relative to the arm frame is adjustable. Specifically, threaded holes are formed in the outer surfaces of the lower ends of the second-stage arm support 12, the third-stage arm support 13, the fourth-stage arm support 14, the fifth-stage arm support 15, the sixth-stage arm support 16 and the seventh-stage arm support 17, the movable limiting bulge 22 is of a rod-shaped structure, external threads are formed in the outer surface of the movable limiting bulge 22, the movable limiting bulge 22 is connected into the threaded holes in a threaded mode, and the protruding height of the movable limiting bulge 22 relative to the arm support is adjustable by rotating the movable limiting bulge 22. During actual production and manufacturing, the fixed limiting bulge 21 is assembled in a rivet or welding mode, and due to the size and the assembly process of the fixed limiting bulge 21, the protruding height of the fixed limiting bulge 21 relative to the arm support has an error with the design requirement, so that adjustment is performed through the movable limiting bulge 22.

The upper end edge positions of other arm frames (a first-stage arm frame 11, a second-stage arm frame 12, a third-stage arm frame 13, a fourth-stage arm frame 14, a fifth-stage arm frame 15 and a sixth-stage arm frame 16) except the innermost arm frame (a seventh-stage arm frame 17) are provided with a plurality of active adjusting mechanisms 3 at intervals.

The active adjusting mechanism 3 includes an assembling seat 31, an adjusting rod 32 and a limiting end. The assembling seat 31 is disposed at the upper end edge positions of other arm frames (the first-stage arm frame 11, the second-stage arm frame 12, the third-stage arm frame 13, the fourth-stage arm frame 14, the fifth-stage arm frame 15, and the sixth-stage arm frame 16) except for the innermost arm frame (the seventh-stage arm frame 17). Specifically, the left side and the right side of the assembly seat 31 are provided with assembly holes, and the assembly screws 311 are connected with the upper end edge positions of the arm frames (the first-stage arm frame 11, the second-stage arm frame 12, the third-stage arm frame 13, the fourth-stage arm frame 14, the fifth-stage arm frame 15 and the sixth-stage arm frame 16) through the assembly holes. The adjusting rod 32 can move relative to the assembling seat 31, and the adjusting rod 32 moves to enable the limiting end to contact or separate from the outer surface of the adjacent inner side arm support. Specifically, a threaded hole is formed in the mounting seat 31, an external thread is formed on the outer surface of the adjustment lever 32, the adjustment lever 32 is screwed into the threaded hole, and the adjustment lever 32 is rotated relative to the nut 312 so as to move the adjustment lever 32 relative to the mounting seat 31. When the adjusting rod 32 moves a set distance relative to the mounting seat 31, the adjusting rod 32 is locked and positioned by the lock nut 312.

In this embodiment, the above-mentioned limiting end can be set into two structural forms: according to one structural form, the limiting end is provided with a limiting block 33, a slide way is arranged in the assembling seat 31, the inner contour of the slide way is matched with the outer contour of the limiting block 33, the limiting block 33 is connected in the slide way of the assembling seat 31 in a sliding mode, a gasket 34 is arranged on the inner end face of the limiting block 33, the tail end of the adjusting rod 32 abuts against the gasket 34, and the outer end face of the limiting block 33 can contact with or separate from the outer surface of the adjacent inner arm support. In another structural form, the limiting end is arranged as the tail end of the adjusting rod 32, and the tail end of the adjusting rod 32 can contact or separate from the outer surface of the adjacent inner side arm support.

In this embodiment, the upper edge of at least one arm support is not coplanar, and the plurality of active adjustment mechanisms 3 are not all located on the same cross section of the arm support. The upper end edge of the arm support is provided with a plane and an inclined plane, and the active adjusting mechanism 3 is arranged on the plane and the inclined plane. The plane and the inclined plane increase the assembling space for assembling the active adjusting mechanism 3 at the upper end edge of the arm support, so that the active adjusting mechanisms 3 are not all positioned on the same cross section of the arm support. The active adjusting mechanisms 3 on at least one arm support are positioned on three cross sections or two cross sections of the arm support, and the active adjusting mechanisms 3 on the first-stage arm support 11, the second-stage arm support 12, the third-stage arm support 13, the fourth-stage arm support 14 and the fifth-stage arm support 15 are positioned on three cross sections or two cross sections of the arm support; the active adjusting mechanisms 3 on the secondary inner arm support (the sixth-stage arm support 16) are positioned on the same cross section of the arm support.

The upper end edge of the first-stage arm support 11 is sequentially provided with a first plane, an inclined plane and a second plane from top to bottom, and a group of active adjusting mechanisms are respectively arranged on the first plane, the second plane and the inclined plane. The group of active adjusting mechanisms 3 on the first plane are coplanar at a cross section S11 of the first-stage arm support 11, the group of active adjusting mechanisms 3 on the second plane are coplanar at a cross section S12 of the first-stage arm support 11, and the group of active adjusting mechanisms 3 on the inclined plane are coplanar at a cross section S13 of the first-stage arm support 11.

The upper end edge of the second-stage arm support 12 is sequentially provided with a first plane, an inclined plane and a second plane from top to bottom, a group of active adjusting mechanisms 3 are respectively arranged on the first plane and the second plane, and the first group of active adjusting mechanisms 3 and the second group of active adjusting mechanisms 3 are arranged on the inclined plane. The first group of active adjusting mechanisms 3 on the first plane are coplanar with one another at a cross section S21 of the second-stage boom 12, the second group of active adjusting mechanisms 3 on the second plane are coplanar with one another at a cross section S22 of the second-stage boom 12, the first group of active adjusting mechanisms 3 on the inclined plane are coplanar with one another at a cross section S23 of the second-stage boom 12, and the second group of active adjusting mechanisms 3 on the inclined plane are coplanar with one another at a cross section S24 of the second-stage boom 12.

The upper end edge of the third-stage arm support 13 is sequentially provided with a plane and an inclined plane from top to bottom, the plane is provided with a group of active adjusting mechanisms 3, and the inclined plane is provided with a first group of active adjusting mechanisms 3 and a second group of active adjusting mechanisms 3. The group of active adjusting mechanisms 3 on the plane are coplanar at a cross section S31 of the third-stage arm support 13, the first group of active adjusting mechanisms 3 on the inclined plane are coplanar at a cross section S32 of the third-stage arm support 13, and the second group of active adjusting mechanisms 3 on the inclined plane are coplanar at a cross section S33 of the third-stage arm support 13.

The upper end edge of the fourth-stage arm support 14 is sequentially provided with a plane and an inclined plane from top to bottom, the plane is provided with a group of active adjusting mechanisms 3, and the inclined plane is provided with a group of active adjusting mechanisms 3. The active adjusting mechanisms 3 on the plane are coplanar with one another in a cross section S41 of the fourth-stage arm support 14, and the group of active adjusting mechanisms 3 on the inclined plane are coplanar with one another in a cross section S42 of the fourth-stage arm support 14.

The upper end edge of the fifth-stage arm support 15 is sequentially provided with a plane and an inclined plane from top to bottom, the plane is provided with a group of active adjusting mechanisms 3, and the inclined plane is provided with a group of active adjusting mechanisms 3. The active adjusting mechanisms 3 on the plane are coplanar with one another in a cross section S51 of the fifth-stage arm support 15, and the group of active adjusting mechanisms 3 on the inclined plane are coplanar with one another in a cross section S52 of the fifth-stage arm support 15.

The upper end edge of the sixth-stage arm support 16 is arranged to be a plane, and a group of active adjusting mechanisms 3 are arranged on the plane. The active adjusting mechanism 3 on the plane is coplanar at a cross section S6 of the sixth-stage arm support 16.

The embodiment of the utility model also provides an overhead working truck which comprises a truck chassis, wherein the truck chassis is provided with the coaxiality-adjustable arm support.

Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, those skilled in the art should clearly recognize that the utility model relates to a coaxiality adjustable arm support. When the coaxiality-adjustable arm support is applied to an overhead working truck, when the multistage arm support is relatively stretched, the limiting protrusions (the fixed limiting protrusion 21 and the movable limiting protrusion 22) on the outer surface of the lower end of the inner arm support slide relative to the inner surface of the outer arm support, and the limiting protrusions are wearing parts, so that the problem that the assembly coaxiality between adjacent arm supports is difficult to maintain due to direct friction wearing between the arm supports is avoided; the active adjusting mechanism 3 at the edge position of the upper end of the outer arm support can be adjusted at any time, and the outer arm support and the inner arm support are adjusted to keep higher coaxiality, so that each stage of arm support is adjusted to be higher coaxiality; the lower end of the arm support is provided with a limiting bulge, the upper end of the arm support is provided with an active adjusting mechanism 3, and the active adjusting mechanism is used for ensuring good stability when the multi-stage arm support is relatively stretched and retracted while realizing coaxiality adjustment, so that adjacent arm supports are not shaken; in addition, the active adjusting mechanisms 3 are not all located on the same cross section of the arm support, so that the coaxiality of the adjacent arm supports is adjusted and supported on the cross sections along the axial direction of the arm support, and the adjusting effect is better.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a cantilever crane with adjustable axiality, includes a plurality of cantilever cranes, each cantilever crane is the tubular structure, and each cantilever crane is nested in proper order and arranges its characterized in that:

the outer surfaces of the lower ends of other arm supports except the outermost arm support are provided with a plurality of limiting bulges at intervals;

a plurality of active adjusting mechanisms are arranged at intervals at the upper end edges of other arm frames except the innermost arm frame;

the active adjusting mechanism comprises an assembling seat, an adjusting rod and a limiting end, the assembling seat is arranged at the position of the upper end edge of other arm supports except the innermost arm support, the adjusting rod can move relative to the assembling seat, and the adjusting rod moves to enable the limiting end to contact or separate from the outer surface of the adjacent inner arm support.

2. The coaxiality-adjustable arm support according to claim 1, wherein: the upper end edge of at least one arm support is not coplanar, and the plurality of active adjusting mechanisms are not all positioned on the same cross section of the arm support.

3. The coaxiality-adjustable arm support according to claim 2, wherein: the upper end edge of the arm support is provided with a plane and an inclined plane, and the active adjusting mechanism is arranged on the plane and the inclined plane.

4. The coaxiality-adjustable arm support according to claim 2, wherein: the active adjusting mechanisms on at least one arm support are positioned on three cross sections or two cross sections of the arm support.

5. The coaxiality-adjustable arm rest according to claim 2, wherein: the active adjusting mechanisms on the secondary inner side arm frame are positioned on the same cross section of the arm frame.

6. The coaxiality-adjustable arm support according to claim 1, wherein: the limiting end is arranged as a limiting block, and the limiting block is connected with the assembling seat in a sliding mode.

7. The coaxiality-adjustable arm support according to claim 1, wherein: the limiting end is arranged at the tail end of the adjusting rod.

8. The coaxiality-adjustable arm support according to claim 1, wherein: the limiting protrusions comprise fixed limiting protrusions and movable limiting protrusions, the fixed limiting protrusions are fixedly connected to the outer surfaces of the lower ends of the other arm supports except the arm support on the outermost side, the movable limiting protrusions are movably connected to the outer surfaces of the lower ends of the other arm supports except the arm support on the outermost side, and the protruding height of the movable limiting protrusions relative to the arm support is adjustable.

9. The coaxiality-adjustable arm support according to claim 1, wherein: the cross section of each arm support is in a symmetrical octagonal shape.

10. The utility model provides an aerial working platform truck, includes the vehicle chassis, its characterized in that: the chassis is provided with a coaxiality-adjustable arm support of any one of claims 1 to 9.

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