CN219603205U - Overhead working truck - Google Patents

Abstract

The utility model discloses an overhead working truck, comprising: a turntable having a rotation center axis; the working mechanism comprises a working assembly and a power assembly, the working assembly is rotationally connected with the turntable, and the power assembly can drive the gravity center of the working assembly to displace in the direction perpendicular to the rotation center shaft; the counterweight mechanism comprises a swing arm, a counterweight and a first telescopic driving piece, wherein the first end of the swing arm is rotationally connected with the turntable, the second end of the swing arm is rotationally connected with the counterweight, the first end of the first telescopic driving piece is rotationally connected with the turntable, and the second end of the first telescopic driving piece is rotationally connected with the swing arm or the counterweight; wherein, the center of gravity of the operation assembly and the center of gravity of the counterweight are respectively positioned at two sides of the rotation center shaft. The first telescopic driving piece can change the horizontal distance between the gravity center of the counterweight and the rotation center shaft of the turntable according to the horizontal distance between the gravity center of the operation assembly and the rotation center shaft of the turntable, so that the overhead working truck is balanced, and the stability and the reliability of the overhead working truck are improved.

Description

Overhead working truck

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to an overhead working truck.

Background

The overhead working truck is moved to the working position by means of movement, rotation, etc. of the loading mechanism such as the boom, the working platform, etc., and the center of gravity of the loading mechanism is generally deviated from the rotation center axis of the loading mechanism by a distance, so that the loading weights are required to be balanced, so that the horizontal distance between the center of gravity of the loading mechanism and the rotation center axis of the loading mechanism is within a safe range.

At present, some balancing weights are fixed on a turntable of an upper mounting mechanism in a fixed mode, the balancing moment is constant, and the balancing weights are limited by factors such as the mass, the tail sweeping radius and the like of the balancing weights, so that the high-altitude operation vehicle is easy to turn over, and the stability and the reliability are poor.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the overhead working truck with higher stability and reliability.

An overhead working truck according to some embodiments of the present utility model includes: a turntable having a rotation center axis; the working mechanism comprises a working assembly and a power assembly, the working assembly is rotationally connected with the turntable, and the power assembly can drive the gravity center of the working assembly to displace in the direction perpendicular to the rotation center shaft; the counterweight mechanism comprises a swing arm, a counterweight and a first telescopic driving piece, wherein the first end of the swing arm is rotationally connected with the turntable, the second end of the swing arm is rotationally connected with the counterweight, the first end of the first telescopic driving piece is rotationally connected with the turntable, the second end of the first telescopic driving piece is rotationally connected with the swing arm or the counterweight, and the first telescopic driving piece is used for driving the swing arm to rotate around the first end of the swing arm so as to enable the counterweight to swing on a vertical plane and generate displacement in a direction perpendicular to the rotation center shaft; wherein the center of gravity of the working assembly and the center of gravity of the counterweight are respectively positioned at two sides of the rotation center shaft.

The overhead working truck provided by the embodiment of the utility model has at least the following beneficial effects:

in the overhead working truck, the turntable can be controlled to rotate, and the turntable rotates around the rotation center shaft when rotating; one end of the operation assembly is rotationally connected with the turntable, and the power assembly can drive the gravity center of the operation assembly to displace in the direction perpendicular to the rotation center shaft of the turntable; the counterweight mainly plays a role in balancing the overhead working truck so as to prevent the overhead working truck from turning over; the swing arm plays a role in connecting the counterweight and the turntable, and the first end of the swing arm is rotationally connected with the turntable, so that the counterweight can swing on a vertical plane; the first telescopic driving piece can stretch out and draw back, and when the first telescopic driving piece stretches out and draws back, the counterweight can be driven to swing on a vertical plane. The balance weight can generate displacement in the direction perpendicular to the rotation center shaft of the turntable in the swinging process, and because the gravity center of the operation assembly and the gravity center of the balance weight are respectively positioned at two sides of the rotation center shaft of the turntable, the first telescopic driving piece changes the horizontal distance between the gravity center of the balance weight and the rotation center shaft of the turntable according to the horizontal distance between the gravity center of the operation assembly and the rotation center shaft of the turntable, so that the overhead working truck can be balanced, the risk of rollover of the overhead working truck is reduced, and the stability and the reliability of the overhead working truck are improved.

According to some embodiments of the utility model, the turntable comprises a rotatable bottom, a connecting portion connected with the bottom and extending upwards, and a tail connected with one end of the connecting portion away from the bottom, the first end of the swing arm is rotatably connected with the tail and enables the counterweight to be located at the rear side of the connecting portion, and the first telescopic driving member can drive the counterweight to be close to or far from the connecting portion, wherein the gravity center of the working assembly is located at the front side of the connecting portion.

According to some embodiments of the utility model, the connecting portion is inclined, and the connecting portion is gradually inclined to the rear side along the opposite direction of gravity, so that a space for avoiding the counterweight is reserved at the lower side of the connecting portion.

According to some embodiments of the utility model, the swing arm includes a first connecting rod, a second connecting rod and an intermediate connecting rod, the first connecting rod and the second connecting rod are arranged in parallel and at intervals, the first end of the first connecting rod and the first end of the second connecting rod are both rotationally connected with the turntable, the second end of the first connecting rod and the second end of the second connecting rod are both fixedly connected with the counterweight, the intermediate connecting rod is connected between the first connecting rod and the second connecting rod, and the second end of the first telescopic driving piece is rotationally connected with the intermediate connecting rod.

According to some embodiments of the utility model, the second end of the first telescopic driving member is located above the counterweight in a state in which the swing arm is vertical, and the first telescopic driving member is gradually disposed obliquely downward from a first end thereof to a second end thereof.

According to some embodiments of the utility model, the working assembly comprises a basic arm support and a telescopic arm support, the first end of the basic arm support is rotatably connected with the turntable, the telescopic arm support is telescopically arranged at the second end of the basic arm support in a penetrating mode, and the power assembly comprises a second telescopic driving piece for adjusting a pitch angle of the basic arm support and a third telescopic driving piece for driving the telescopic arm support to stretch in the basic arm support.

According to some embodiments of the utility model, a first end of the second telescoping drive is rotatably connected to the turntable, and a second end of the second telescoping drive is rotatably connected to the base boom.

According to some embodiments of the utility model, the second telescopic drive is connected to the underside of the basic boom.

According to some embodiments of the utility model, the second telescopic drive and/or the third telescopic drive is an oil cylinder, an air rod or a power screw.

According to some embodiments of the utility model, the first telescopic driving member is an oil cylinder, an air rod or a power screw.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of an overhead working truck according to an embodiment of the present utility model;

FIG. 2 is a schematic side view of an overhead working truck according to one embodiment of the present utility model;

FIG. 3 is a schematic rear view of an overhead working truck according to one embodiment of the present utility model;

FIG. 4 is a schematic side view of a aerial lift device according to an embodiment of the present utility model;

fig. 5 is a schematic side view of an overhead working truck according to an embodiment of the present utility model.

Reference numerals:

100. a turntable; 110. a bottom; 120. a connection part; 130. tail part;

200. a working mechanism; 210. a work assembly; 211. a basic arm support; 212. a telescopic boom; 220. a power assembly; 221. a second telescopic driving member;

300. a weight mechanism; 310. swing arms; 311. a first connecting rod; 312. a second connecting rod; 313. an intermediate connecting rod; 320. a counterweight; 330. a first telescoping drive.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, an overhead working truck according to an embodiment of the present utility model includes a turntable 100, a working mechanism 200, and a counterweight mechanism 300.

Referring to fig. 1 and 2, the turntable 100 has a rotation center axis.

Specifically, the turntable 100 is capable of controlled rotation, and the turntable 100 rotates around a rotation center axis when rotating.

The working mechanism 200 includes a working assembly 210 and a power assembly 220, wherein the working assembly 210 is rotatably connected with the turntable 100, and the power assembly 220 is capable of driving the center of gravity of the working assembly 210 to displace in a direction perpendicular to the rotation center axis of the turntable 100.

Specifically, one end of the working assembly 210 is rotatably connected to the turntable 100, the power assembly 220 can drive the working assembly 210 to rotate to adjust the pitch angle, and the power assembly 220 can also drive the working assembly 210 to expand and contract itself. As the pitch angle and/or length of work assembly 210 changes, the position of the center of gravity of work assembly 210 also changes.

In some cases, when the center of gravity of the working unit 210 changes, the center of gravity of the working unit 210 is displaced in a direction perpendicular to the rotation center axis of the turntable 100.

It will be appreciated that when the overhead working truck is placed on a level ground, the rotation center axis of the turntable 100 is a vertical line, and the direction perpendicular to the rotation center axis of the turntable 100 is a horizontal direction.

Referring to fig. 1 and 2, the counterweight mechanism 300 includes a swing arm 310, a counterweight 320, and a first telescopic driving member 330, a first end of the swing arm 310 is rotationally connected with the turntable 100, a second end of the swing arm 310 is connected with the counterweight 320, a first end of the first telescopic driving member 330 is rotationally connected with the turntable 100, a second end of the first telescopic driving member 330 is rotationally connected with the swing arm 310 or the counterweight 320, and the first telescopic driving member 330 is used for driving the swing arm 310 to rotate around the first end of the swing arm 310, so that the counterweight 320 swings in a vertical plane to generate displacement in a direction perpendicular to a rotation center axis. Wherein the center of gravity of the working assembly 210 and the center of gravity of the balance weight 320 are located at both sides of the rotation center axis of the turntable 100, respectively.

Specifically, the counterweight 320 mainly plays a role in balancing the aerial work vehicle, so as to prevent the aerial work vehicle from turning over; the swing arm 310 plays a role of connecting the balance weight 320 and the turntable 100, and the first end of the swing arm 310 is rotatably connected with the turntable 100, so that the balance weight 320 can swing in a vertical plane; the first telescopic driving piece 330 can stretch out and draw back, and the first end of first telescopic driving piece 330 rotates with the revolving stage 100 to be connected, and the second end of first telescopic driving piece 330 rotates with swing arm 310 or counter weight 320 to be connected, so, when first telescopic driving piece 330 stretches out and draws back, can drive counter weight 320 and swing at vertical plane.

More specifically, the balance weight 320 is fixedly coupled to the second end of the swing arm 310, the balance weight 320 is suspended on the turntable 100 by the swing arm 310, and the first telescopic driving member 330 is used to drive the balance weight 320 to rotate in a vertical plane so that the balance weight 320 can be displaced in a direction perpendicular to the rotation center axis of the turntable 100.

As can be appreciated from fig. 1, 2, 4 and 5, the counterweight 320 can be displaced in a direction perpendicular to the rotation center axis of the turntable 100 during the swinging process, and because the center of gravity of the working assembly 210 and the center of gravity of the counterweight 320 are located at two sides of the rotation center axis of the turntable 100, respectively, the first telescopic driving member 330 changes the horizontal distance between the center of gravity of the counterweight 320 and the rotation center axis of the turntable 100 according to the horizontal distance between the center of gravity of the working assembly 210 and the rotation center axis of the turntable 100, so that the overhead working truck can reach balance, and the risk of rollover of the overhead working truck is reduced.

The working unit 210 is connected to the turntable 100 and extends toward the front side of the turntable 100, the center of gravity of the working unit 210 is located on the front side of the rotation center axis of the turntable 100, the weight 320 is disposed on the rear side of the turntable 100, and the center of gravity of the weight 320 is located on the rear side of the rotation center axis of the turntable 100.

As shown in fig. 2, in some embodiments, the turntable 100 includes a rotatable base 110, a connection portion 120 connected to the base 110 and extending upward, and a tail portion 130 connected to an end of the connection portion 120 remote from the base 110, a first end of the swing arm 310 is rotatably connected to the tail portion 130 and positions the weight 320 at a rear side of the connection portion 120, and the first telescopic driving member 330 is capable of driving the weight 320 toward or away from the connection portion 120.

Specifically, the bottom 110 is rotatably disposed on the chassis of the overhead working truck, and when the bottom 110 rotates, the bottom drives the connection portion 120 and the tail portion 130 to rotate together, and the counterweight 320 is located at the rear side of the connection portion 120, occupies the space at the rear side of the connection portion 120, and makes the center of gravity of the counterweight 320 located at the rear side of the rotation center axis of the turntable 100.

Further, the connection part 120 is inclined, and the connection part 120 is gradually inclined to the rear side in the opposite direction of the gravity, so that the lower side of the connection part 120 is left in the avoidance space of the avoidance weight 320.

Specifically, the connection portion 120 is gradually inclined from bottom to top toward the rear side, so that a space is reserved below the connection portion 120, and the space can be used for swinging the counterweight 320, so that interference between the connection portion 120 and the counterweight 320 is avoided, and when the counterweight 320 utilizes the space below the connection portion 120, the tail sweeping radius can be reduced.

It should be noted that, if the swing radius of the counterweight 320 needs to be increased to meet the requirement of greater balance adjustment, the length of the swing arm 310 may be increased, the height of the connecting portion 120 may be increased, and the length of the tail 130 may be increased, so as to prevent the counterweight 320 from interfering with the turntable 100.

Referring to fig. 2 and 3, in some embodiments, the swing arm 310 includes a first connecting rod 311, a second connecting rod 312, and an intermediate connecting rod 313, the first connecting rod 311 and the second connecting rod 312 are arranged in parallel and spaced apart, a first end of the first connecting rod 311 and a first end of the second connecting rod 312 are both rotatably connected with the turntable 100, a second end of the first connecting rod 311 and a second end of the second connecting rod 312 are both fixedly connected with the counterweight 320, the intermediate connecting rod 313 is connected between the first connecting rod 311 and the second connecting rod 312, and a second end of the first telescopic driving member 330 is rotatably connected with the intermediate connecting rod 313.

In this way, the swing arm 310 may have a higher structural strength and a higher bearing capacity, and the first telescopic driving member 330 may rotate by driving the intermediate connection rod 313, thereby allowing the swing arm 310 and the counterweight 320 to swing in a vertical plane.

Further, as shown in fig. 2, in the state where the swing arm 310 is in the vertical state, the second end of the first telescopic driving piece 330 is located above the weight 320, and the first telescopic driving piece 330 is gradually disposed to be inclined downward from the direction from the first end thereof to the second end thereof.

Thus, when the counterweight 320 hangs naturally under the action of gravity, the first telescopic driving element 330 may not support the counterweight 320, and the first telescopic driving element 330 may not receive pressure from the counterweight 320, which is beneficial to prolonging the service life.

In some embodiments, the first telescopic driving member 330 is an oil cylinder, however, in other embodiments, the first telescopic driving member 330 may be an air rod or a power screw rod.

Referring to fig. 1 and fig. 2, in some embodiments, the working assembly 210 includes a base arm 211 and a telescopic arm 212, a first end of the base arm 211 is rotatably connected to the turntable 100, the telescopic arm 212 is telescopically disposed at a second end of the base arm 211, and an end of the telescopic arm 212 remote from the base arm 211 is used for connecting to a working platform. The power assembly 220 includes a second telescopic drive 221 for adjusting the pitch angle of the base boom 211, and a third telescopic drive (not shown) for driving the telescopic boom 212 to telescope within the base boom 211.

Specifically, the second telescopic driving piece 221 is used for driving the basic arm frame 211 to rotate around the first end of the basic arm frame 211, so as to realize adjustment of a pitch angle, and the third telescopic driving piece is used for driving the telescopic arm frame 212 to stretch out and draw back in the basic arm frame 211, and when the pitch angle of the basic arm frame 211 and/or the stretching amount of the telescopic arm frame 212 change, the position of the gravity center of the working assembly 210 also changes.

It should be noted that, the power assembly 220 may further include other telescopic driving members, and the other telescopic driving members may also be capable of adjusting the posture of the working assembly 210, so that the position of the center of gravity of the working assembly 210 is changed.

Further, a first end of the second telescopic driving member 221 is rotatably connected to the turntable 100, and a second end of the second telescopic driving member 221 is rotatably connected to the base arm 211. In this way, when the second telescopic driving piece 221 is telescopic, the second telescopic driving piece 221 can adjust the pitch angle of the basic boom 211.

Specifically, the second telescopic driving piece 221 is connected to the lower side of the basic arm frame 211, the second telescopic driving piece 221 plays a supporting role on the basic arm frame 211, and when the second telescopic driving piece 221 stretches, the second telescopic driving piece 221 can adjust the pitch angle of the basic arm frame 211.

In some embodiments, the second telescopic driving piece 221 is an oil cylinder, and of course, in other embodiments, the second telescopic driving piece 221 may be a gas rod or a power screw rod.

Further, the first end of the third telescopic driving piece is fixedly arranged on the basic arm support 211, the second end of the third telescopic driving piece is fixedly connected with the telescopic arm support 212, and the third telescopic driving piece is used for driving the telescopic arm support 212 to stretch in the basic arm support 211.

In some embodiments, the third telescopic driving piece is an oil cylinder, and in other embodiments, the third telescopic driving piece can be a pneumatic rod or a power screw rod.

In the overhead working truck of the present utility model, the turntable 100 is capable of controlled rotation, and the turntable 100 rotates around its rotation center axis when rotating; one end of the working assembly 210 is rotatably connected with the turntable 100, and the power assembly 220 can drive the gravity center of the working assembly 210 to displace in a direction perpendicular to the rotation center axis of the turntable 100; the counterweight 320 mainly plays a role in balancing the overhead working truck so as to prevent the overhead working truck from turning over; the swing arm 310 plays a role of connecting the balance weight 320 and the turntable 100, and the first end of the swing arm 310 is rotatably connected with the turntable 100, so that the balance weight 320 can swing in a vertical plane; the first telescopic driving piece 330 can stretch and retract, and when the first telescopic driving piece 330 stretches and contracts, the counterweight 320 can be driven to swing on a vertical plane. The counterweight 320 can generate displacement in a direction perpendicular to the rotation center axis of the turntable 100 during the swinging process, and since the center of gravity of the working assembly 210 and the center of gravity of the counterweight 320 are respectively located at two sides of the rotation center axis of the turntable 100, the first telescopic driving piece 330 changes the horizontal distance between the center of gravity of the counterweight 320 and the rotation center axis of the turntable 100 according to the horizontal distance between the center of gravity of the working assembly 210 and the rotation center axis of the turntable 100, so that the overhead working truck can reach balance, the risk of rollover of the overhead working truck is reduced, and the stability and reliability of the overhead working truck are improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An aerial work vehicle, comprising:

a turntable having a rotation center axis;

the working mechanism comprises a working assembly and a power assembly, the working assembly is rotationally connected with the turntable, and the power assembly can drive the gravity center of the working assembly to displace in the direction perpendicular to the rotation center shaft;

the counterweight mechanism comprises a swing arm, a counterweight and a first telescopic driving piece, wherein the first end of the swing arm is rotationally connected with the turntable, the second end of the swing arm is rotationally connected with the counterweight, the first end of the first telescopic driving piece is rotationally connected with the turntable, the second end of the first telescopic driving piece is rotationally connected with the swing arm or the counterweight, and the first telescopic driving piece is used for driving the swing arm to rotate around the first end of the swing arm so as to enable the counterweight to swing on a vertical plane and generate displacement in a direction perpendicular to the rotation center shaft;

wherein the center of gravity of the working assembly and the center of gravity of the counterweight are respectively positioned at two sides of the rotation center shaft.

2. The aerial work vehicle of claim 1, wherein the turntable includes a rotatable base, a connection portion connected to the base and extending upwardly, and a tail portion connected to an end of the connection portion remote from the base, the swing arm having a first end rotatably connected to the tail portion and having the counterweight located on a rear side of the connection portion, the first telescoping drive being capable of driving the counterweight toward or away from the connection portion, wherein a center of gravity of the work assembly is located on a front side of the connection portion.

3. The aerial work vehicle of claim 2, wherein the connection portion is inclined, and the connection portion is gradually inclined to the rear side in a direction opposite to the gravity, so that a space for avoiding the counterweight is left at the lower side of the connection portion.

4. The aerial working truck of claim 1, wherein the swing arm comprises a first connecting rod, a second connecting rod and an intermediate connecting rod, wherein the first connecting rod is arranged in parallel with the second connecting rod at intervals, the first end of the first connecting rod and the first end of the second connecting rod are both rotationally connected with the turntable, the second end of the first connecting rod and the second end of the second connecting rod are both fixedly connected with the counterweight, the intermediate connecting rod is connected between the first connecting rod and the second connecting rod, and the second end of the first telescopic driving piece is rotationally connected with the intermediate connecting rod.

5. The aerial work vehicle of claim 1 wherein the second end of the first telescoping drive is positioned above the counterweight and the first telescoping drive is progressively downwardly sloped from its first end to its second end in the swing arm in the upright position.

6. The aerial work vehicle of claim 1, wherein the work assembly comprises a base boom and a telescoping boom, a first end of the base boom is rotatably connected to the turntable, the telescoping boom is telescopically received at a second end of the base boom, and the power assembly comprises a second telescoping drive for adjusting a pitch angle of the base boom, and a third telescoping drive for driving the telescoping boom to telescope within the base boom.

7. The aerial work vehicle of claim 6 wherein a first end of the second telescoping drive is rotatably coupled to the turntable and a second end of the second telescoping drive is rotatably coupled to the base boom.

8. The aerial vehicle of claim 7, wherein the second telescoping drive is connected to an underside of the base boom.

9. The aerial work vehicle of claim 6, wherein the second telescoping drive and/or the third telescoping drive is an oil cylinder, an air bar, or a power screw.

10. The aerial work vehicle of claim 1, wherein the first telescoping drive is an oil cylinder, an air bar, or a power screw.