CN217972350U - Telescopic boom limiting device and high-altitude operation machine - Google Patents

Abstract

The utility model provides a telescopic boom limiting device and an aerial work machine, wherein the telescopic boom limiting device comprises a base, a limiting assembly and an elastic resetting piece; the base is fixedly arranged on a frame of the high-altitude operation machine; the limiting component is rotatably connected with the base and is positioned at the tail end of the telescopic arm frame at intervals, and when the arm frame descends or ascends, the limiting component is connected with or separated from the telescopic arm frame so as to limit or unlock the limiting telescopic arm frame; the two ends of the elastic reset piece are respectively connected with the base and the limiting assembly, and when the limiting assembly unlocks the limiting telescopic arm frame, the elastic reset piece drives the limiting assembly to rotate relative to the base so as to reset the limiting assembly. The utility model provides a flexible cantilever crane stop device need not artifical extra operation can realize the spacing of flexible arm, easy operation is reliable.

Description

Telescopic boom limiting device and high-altitude operation machine

Technical Field

The utility model belongs to the technical field of high altitude construction, especially, relate to a flexible cantilever crane stop device and high altitude construction machinery.

Background

In an existing aerial work machine, such as a telescopic boom of an aerial work vehicle, the telescopic boom is usually controlled to be telescopic by a telescopic cylinder between the telescopic boom and a base boom, and the telescopic cylinder is usually equipped with a control valve with a self-locking function or a hydraulic lock device with other equivalent functions, so as to prevent the telescopic cylinder from accidentally (during non-active operation) extending and retracting during the running process of the aerial work vehicle.

However, during the traveling process of the overhead working truck, due to factors such as vehicle bumping, the telescopic cylinder or the cylinder control valve has the risk of internal leakage, so that the telescopic cylinder extends under the condition of non-active operation, and the extending motion can generate an accumulative effect along with the increase of time. When the telescopic arm extends out relative to the basic arm and runs on the overhead working truck, the telescopic arm continuously extends out, and the structure at the end part of the arm support is displaced, so that the appearance size of the overhead working truck during running is possibly increased, and some potential safety hazards are possibly generated during running of the overhead working truck. In order to solve the problem that flexible arm stretches out easily among the prior art, adopt wire rope or bolt device to control flexible arm usually, but this kind of mode needs artifical participation, complex operation, and the potential safety hazard is great.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a flexible cantilever crane stop device and high altitude construction machinery, need artifical participation, complex operation's technical problem when aiming at solving among the prior art to flexible arm spacing.

In order to achieve the above object, the utility model provides a flexible cantilever crane stop device, include:

the base is fixedly arranged on a frame of the high-altitude operation machine;

the limiting component is rotatably connected with the base and is positioned at the tail end of the telescopic arm frame at intervals, and when the telescopic arm descends or ascends, the limiting component is connected with or separated from the telescopic arm frame so as to limit or unlock the telescopic arm frame; and

and two ends of the elastic resetting piece are respectively connected with the base and the limiting assembly, and when the limiting assembly unlocks and limits the telescopic arm support, the elastic resetting piece drives the limiting assembly to rotate relative to the base so as to reset the limiting assembly.

In an embodiment of the present invention, the limiting component includes:

the limiting block is used for being abutted against the bottom of the telescopic arm support; and

the blocking protrusion is arranged on one side, facing the telescopic boom, of the limiting block, and is used for blocking and limiting the side face of the tail end of the telescopic boom when the limiting block abuts against the telescopic boom.

The utility model discloses an in the embodiment, the below of flexible arm is close to the afterbody and is provided with the extension, the extension is open type box structure, the side of extension have with block uncovered of protruding butt.

The utility model discloses an in the embodiment, the stopper include vertical linkage segment, connect respectively in the first lateral extension section and the second lateral extension section at the both ends of vertical linkage segment, block the arch and locate first lateral extension section orientation one side of flexible arm, the second lateral extension section can be dismantled and be connected with and be used for supporting the kicking block of the bottom of flexible arm.

In an embodiment of the present invention, the top end surface of the top block is a circular arc convex surface.

The utility model discloses an in the embodiment, flexible cantilever crane stop device still including install in blotter on the base, the blotter deviates from one side butt of base the stopper.

In the embodiment of the present invention, the cushion pad, the blocking protrusion and the top block are made of flexible material.

The utility model discloses an in the embodiment, the base includes the bottom plate and locates installation department on the bottom plate, the bottom side of stopper with the installation department deviates from one side of flexible arm is through round pin axle rotatable coupling.

In an embodiment of the present invention, the elastic restoring member is an extension spring, and the extension spring is located toward one side of the telescopic arm.

The embodiment of the utility model provides an in, still provide an aerial working machine, aerial working machine includes as above flexible cantilever crane stop device, nested basic arm and a plurality of flexible arm in proper order, a plurality of flexible arm can stretch out and draw back in step, flexible cantilever crane stop device is used for wherein at least one flexible arm carries on spacingly.

Through the technical scheme, the embodiment of the utility model provides a flexible cantilever crane stop device has following beneficial effect:

the base is fixedly arranged on a frame of the high-altitude operation machine, the limiting assembly can be rotatably connected to the base, and when the telescopic arm descends or ascends, the limiting assembly is connected with or separated from the telescopic arm so as to limit or unlock the limiting telescopic arm; in addition, the both ends that the elasticity resets are connected with base and spacing subassembly respectively, and when spacing subassembly unblock spacing flexible arm, the elasticity resets the relative base rotation of spacing subassembly drive to make spacing subassembly reset. This application adopts spacing subassembly to carry on spacingly around base pivoted mode to reset through elasticity and realize spacing subassembly's automatic re-setting, compare spacing schemes such as current artifical bolt, wire rope bandage, the stop device of this application need not artifical extra operation can realize the spacing of flexible arm, prevents that flexible arm from slipping out from basic arm, easy operation, reliable.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention, but do not constitute a limitation of the invention. In the drawings:

fig. 1 is a schematic structural view of a limiting device of a telescopic boom according to an embodiment of the present invention;

fig. 2 is a schematic rear view of a limiting device of a telescopic boom according to an embodiment of the present invention;

fig. 3 is a schematic structural view illustrating the assembly limit of the telescopic boom limiting device and the telescopic boom according to an embodiment of the present invention;

fig. 4 is a schematic front view illustrating the assembly limit of the telescopic boom limiting device and the telescopic boom according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of the assembly limit of the telescopic boom limiting device and the telescopic boom after the telescopic boom is completely lowered;

FIG. 6 is a schematic structural view of the relative positions of the limiting device of the telescopic boom and the telescopic boom after the telescopic boom is lifted;

FIG. 7 is a schematic structural view of a telescopic boom of the aerial work machine of the present invention;

fig. 8 is a schematic view of an assembly structure of the base arm and the telescopic arm in the aerial work machine of the present invention.

Description of the reference numerals

Reference numerals	Name (R)	Reference numerals	Name (R)
				10	Basic arm	44	Top block
20	Telescopic arm	50	Stopping protrusion
				30	Base seat	60	Buffer cushion
31	Base plate	70	Elastic reset piece
				32	Mounting part	80	Pin shaft
40	Limiting block	90	Extension part
				41	Vertical connecting section	91	Limiting groove
42	First transverse extension	92	Open mouth
				43	Second transversely extending section

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be understood that the description herein of specific embodiments is for purposes of illustration and explanation only and is not intended to limit the invention.

The following describes a telescopic boom limiting device and an aerial work machine according to the present invention with reference to the accompanying drawings.

In order to prevent the telescopic arm 20 of the aerial work machine from slipping out of the base arm 10, the telescopic arm 20 is usually prevented from shifting outwards by a latch device on the base arm 10, so as to avoid safety accidents; or all the knuckle arms are locked together by using a steel wire rope so as to achieve the purpose of limiting the telescopic arm 20; however, when the bolt device is used for limiting, the bolt device needs a control device, and the bolt needs to be pulled out before the arm support needs to be stretched out each time; when the steel wire rope is used for limiting, the steel wire rope needs to be manually unbundled when the arm support works at every time, and the two limiting modes need manual additional operation and are inconvenient to operate.

In view of this, as shown in fig. 1 to 4, in an embodiment of the present invention, a telescopic boom limiting device is provided, which is applied to an aerial work machine, such as an aerial work vehicle; this telescopic boom stop device includes:

the base 30 is fixedly arranged on a frame of the high-altitude operation machine;

a limiting component, which is rotatably connected with the base 30 and is positioned at the tail end of the telescopic arm 20 at intervals, and when the telescopic arm 20 descends or ascends, the limiting component is connected with or separated from the telescopic arm 20 so as to limit or unlock the limiting telescopic arm 20; and

the elastic reset piece 70 is connected with the base 30 and the limiting assembly at two ends respectively, and when the limiting assembly unlocks the limiting telescopic arm 20, the elastic reset piece 70 drives the limiting assembly to rotate relative to the base 30 so as to reset the limiting assembly.

When the telescopic arm 20 descends to the position of the limiting component, the limiting component is connected with the telescopic arm 20 and plays a certain limiting role on the tail end of the telescopic arm 20, so that the telescopic arm is prevented from continuously descending and sliding outwards; when the telescopic arm 20 is lifted, the telescopic arm 20 is separated from the limiting assembly, at this time, the limiting assembly unlocks the limiting of the telescopic arm 20, and meanwhile, the elastic resetting piece 70 drives the limiting assembly to reset to the initial position. This application adopts spacing subassembly to carry on spacingly around base 30 pivoted mode to reset 70 through elasticity and realize the automatic re-setting of spacing subassembly, compare spacing schemes such as current artifical bolt, wire rope bandage, the stop device of this application need not artifical extra operation can realize the spacing of flexible arm 20, prevents that flexible arm 20 from slipping out from basic arm 10, easy operation, reliable.

In an embodiment of the present invention, the limiting component includes:

a limiting block 40 for abutting against the bottom of the telescopic arm 20; and

the blocking protrusion 50 is arranged on one side, facing the telescopic arm 20, of the limiting block 40, and when the limiting block 40 abuts against the telescopic arm 20, the blocking protrusion 50 is used for blocking and limiting the side face of the tail end of the telescopic arm 20.

In order to better limit the telescopic arm 20, an extension portion 90 is disposed below the telescopic arm 20 near the tail portion, and the extension portion 90 may be a mounting structure of a telescopic cylinder or may be separately disposed so as to be matched with the limit component. As shown in fig. 7, the extension portion 90 is an open box structure, the bottom of the extension portion 90 has a limit groove 91 abutting against the stop protrusion 50, and an opening 92 is formed on a side surface of the extension portion.

When the telescopic arm 20 extends out of the basic arm 10, the side face of the extending part 90 below can be driven to move towards the limiting block 40, when the bottom of the limiting groove 91 of the extending part 90 contacts the limiting block 40, the extending part 90 exerts acting force on the limiting block 40, so that the limiting block 40 can rotate relative to the base 30, only the limiting block 40 plays a limiting role on the extending part 90 at the moment, and the blocking protrusion 50 does not contact the opening 92 on the side face of the extending part 90 at the moment; when the telescopic arm 20 continues to slide out of the base arm 10, since the blocking projection 50 projects from the stopper 40 toward one side of the telescopic arm 20, the blocking projection 50 contacts and abuts against the bottom wall of the opening 92 by the time the telescopic arm 20 slides out to a predetermined distance, thereby further blocking the extension 90 and preventing the entire telescopic arm 20 from further sliding out.

The utility model discloses an in the embodiment, stopper 40 includes vertical linkage segment 41, connects respectively in the first lateral extension section 42 and the second lateral extension section 43 at the both ends of vertical linkage segment 41, blocks that protruding 50 locates first lateral extension section 42 towards the one side of flexible arm 20, and second lateral extension section 43 can dismantle and be connected with the kicking block 44 that is used for supporting the bottom of flexible arm 20. Wherein, the length of the first transversely extending section 42 is less than that of the second transversely extending section 43, so that when the telescopic arm 20 is slid out from the basic arm 10 by a distance less than the contact distance with the stopping projection 50, the first transversely extending section 42 does not obstruct the extending part 90 from contacting the stopper 40, so that the stopper 40 can normally rotate.

Because the bottom side surface of the limiting groove 91 is the circular arc-shaped opening, in order to enable the top block 44 to be matched with the limiting groove 91, the top end surface of the top block 44 is the circular arc-shaped convex surface, and when the extending part 90 abuts against the top block 44, the circular arc-shaped opening is directly contacted with the top end surface of the top block 44, so that the abutting stability is ensured.

The utility model discloses an in the embodiment, flexible cantilever crane stop device is still including installing blotter 60 on base 30, and blotter 60 deviates from one side butt stopper 40 of base 30, and wherein, blotter 60 can avoid assaulting base 30 when stopper 40 resets, and then prevents the damage because of the collision causes between stopper 40 and the base 30.

In order to prevent the bumper pad 60, the bumper protrusion 50 and the top block 44 from damaging the stopper 40 and from damaging the stopper 40 when the bumper protrusion 50 and the top block 44 contact the telescopic arm 20, the bumper pad 60, the bumper protrusion 50 and the top block 44 are made of flexible materials.

The embodiment of the utility model provides an in, base 30 includes bottom plate 31 and locates installation department 32 on the bottom plate 31, and the bottom side of stopper 40 and one side that installation department 32 deviates from flexible arm 20 are through round pin axle 80 rotatable coupling. The bottom plate 31 is provided with a plurality of mounting holes for fasteners to pass through, and the bottom plate 31 and the frame of the aerial work machine are fixedly connected through the fasteners.

The embodiment of the utility model provides an in, elasticity piece 70 that resets is extension spring, and extension spring is located one side towards flexible arm 20, extension spring with block protruding 50 and be located same one side, extension spring's one end is passed through the mounting and is installed in the position that vertical link is close to the top, the other end is installed on the installation department 32 of base 30, at stopper 40 pivoted in-process, extension spring exerts the tensile effort of elasticity to stopper 40 all the time to realization that can be fine resets stopper 40 after the unblock is spacing.

Furthermore, in the embodiment of the utility model, the high altitude construction machinery is still proposed, and the high altitude construction machinery includes as above telescopic boom stop device, nested basic arm 10 and a plurality of telescopic boom 20 in proper order, and a plurality of telescopic boom 20 can stretch out and draw back in step, and telescopic boom stop device is used for spacing wherein at least one telescopic boom 20. That is, as shown in fig. 8, since the plurality of telescopic arms 20 are synchronously telescopic, the simultaneous position limitation of the plurality of telescopic arms 20 can be realized by limiting one of the telescopic arms 20. As shown in fig. 8, the number of the telescopic arms 20 is three, and the three telescopic arms 20 are synchronously telescopic, so that when limiting, any one section of telescopic arm 20 can be limited by using a telescopic arm frame limiting device, that is, the whole telescopic arm 20 can be limited from sliding out of the basic arm 10.

In order to further understand the technical scheme of the application, the whole limiting process is described in detail as follows:

as shown in fig. 5, when the telescopic boom 20 is in the storage state, the boom is completely lowered, the extending portion 90 of the telescopic boom 20 presses down the top block 44, so that the limiting block 40 rotates to the limiting position, because the length of the first transverse extending section 42 is smaller than that of the second transverse extending section 43, the limiting groove 91 at the bottom of the extending portion 90 of the telescopic boom 20 only abuts against the top block 44, the blocking protrusion 50 is not yet contacted with the bottom wall of the opening 92 on the side surface of the extending portion 90, and the limiting block 40 plays a limiting role; when the telescopic arm 20 slips out of the basic arm 10 due to internal leakage of the telescopic oil cylinder or the oil cylinder control valve and the like, the blocking protrusion 50 of the limiting block 40 can enter the opening on the side surface, so that the purpose of limiting the extending part 90 is realized, the telescopic arm 20 is limited to continuously slip out of the basic arm 10, and the limiting purpose is achieved. The top surface of the top block 44 is a cylindrical surface, which can ensure that the extension part 90 is always in contact with the top block 44 during pressing.

As shown in fig. 6, when the telescopic arm 20 is slightly raised, the extension spring pulls the limiting block 40 to reset, and the extension portion 90 of the telescopic arm 20 moves away from the limiting block 40, the limiting block 40 is separated from the extension portion 90 of the telescopic arm 20, the limiting block 40 no longer has a limiting effect on the extension portion 90 of the telescopic arm 20, and the telescopic arm 20 can normally operate.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a flexible cantilever crane stop device which characterized in that includes:

a base (30) fixedly mounted on a frame of the aerial work machine;

the limiting component is rotatably connected with the base (30) and is positioned at the tail end of the telescopic arm (20) at intervals, and when the telescopic arm (20) descends or ascends, the limiting component is connected with or separated from the telescopic arm (20) so as to limit or unlock the telescopic arm (20); and

the two ends of the elastic resetting piece (70) are respectively connected with the base (30) and the limiting assembly, and when the limiting assembly is unlocked and limited to the telescopic arm (20), the elastic resetting piece (70) drives the limiting assembly to rotate relative to the base (30) so that the limiting assembly is reset.

2. The telescopic boom limiting device according to claim 1, wherein the limiting assembly comprises:

the limiting block (40) is used for being abutted against the bottom of the telescopic arm (20); and

block protruding (50), locate stopper (40) orientation one side of flexible arm (20) stopper (40) butt during flexible arm (20), it is right to block protruding (50) be used for the tail end side of flexible arm (20) blocks spacingly.

3. The limiting device of the telescopic boom support according to claim 2, wherein an extension part (90) is arranged below the telescopic boom (20) and close to the tail part, the extension part (90) is of an open box structure, and an opening (92) abutted against the blocking protrusion (50) is arranged on the side surface of the extension part (90).

4. The telescopic boom limiting device according to claim 2, wherein the limiting block (40) comprises a vertical connecting section (41), a first transverse extending section (42) and a second transverse extending section (43) which are respectively connected to two ends of the vertical connecting section (41), the blocking protrusion (50) is arranged on one side of the first transverse extending section (42) facing the telescopic boom (20), and the second transverse extending section (43) is detachably connected with a top block (44) for supporting the bottom of the telescopic boom (20).

5. The telescopic boom limiting device as claimed in claim 4, wherein the top end surface of the top block (44) is a circular arc convex surface.

6. The telescopic boom limiting device according to claim 4, further comprising a cushion pad (60) mounted on the base (30), wherein a side of the cushion pad (60) facing away from the base (30) abuts against the limiting block (40).

7. The telescopic boom limiting device according to claim 6, wherein the cushion pad (60), the stopping protrusion (50) and the top block (44) are made of flexible materials.

8. The telescopic boom limiting device according to any one of claims 2 to 7, wherein the base (30) comprises a bottom plate (31) and an installation part (32) arranged on the bottom plate (31), and the side surface of the bottom end of the limiting block (40) is rotatably connected with one side of the installation part (32) departing from the telescopic boom (20) through a pin shaft (80).

9. The telescopic boom limiting device according to any one of claims 1 to 7, wherein the elastic return member (70) is an extension spring, and the extension spring is located on a side facing the telescopic boom (20).

10. An aerial work machine, characterized in that the aerial work machine comprises a telescopic boom limiting device as claimed in any one of claims 1 to 9, a base arm (10) and a plurality of telescopic booms (20) which are nested in sequence, wherein the plurality of telescopic booms (20) can be synchronously telescopic, and the telescopic boom limiting device is used for limiting at least one telescopic boom (20).

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