Folding type suspension arm and folding arm type lorry-mounted crane

Abstract

The invention relates to the technical field of engineering machinery, in particular to a folding type suspension arm and a folding arm type lorry-mounted crane, the suspension arm comprises a rotary table, a basic arm and an outer arm, the basic arm is hinged to the rotary table, the outer arm is hinged to the basic arm, and the basic arm and the outer arm are driven by a telescopic device; the center lines of the rotary table, the basic arm and the outer arm are located on the same vertical plane, and the rotary table is of a U-shaped structure. The crane comprises a movable supporting leg, a base and a suspension arm, the supporting leg provides stable support for the whole crane, the base bears the suspension arm of the crane, the supporting leg is installed on the base, and the suspension arm is installed on the base; and the suspension arm is a folding type suspension arm. The invention is mainly applied to the folding arm type lorry-mounted crane, overcomes the characteristics of concentrated and complicated structural stress caused by the unbalance loading structural form of the basic arm of the folding arm type lorry-mounted crane in the market, and reduces the production cost and the design difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, and in particular to a folding boom and a folding-boom truck crane. BACKGROUND

[0002] The folding-boom truck crane is widely used in the fields of fishery, construction, logistics and municipal administration. In recent years, with the compactness of urban space and the increase of temporary operation scenarios, the market demand for portable, small-stored and quickly-deployed hoisting devices has significantly increased, especially in narrow construction sites, small warehouses and emergency repair, etc. The traditional large hoisting machines (such as truck cranes) cannot meet the flexible operation requirements due to the limited operation space and high transportation cost.

[0003] The basic arm of the existing folding-boom truck crane is an eccentric structure, which will cause eccentric loading on the structure when hoisting, resulting in stress concentration and complexity of the structure, and high requirements for design and production process. SUMMARY

[0004] The present application provides a folding boom with an eccentric loading structure and a folding-boom truck crane, which solves the problem of stress concentration and complexity of the structure caused by the eccentric loading structure of the basic arm of the folding-boom truck crane on the market.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A folding boom, comprising a rotary table, a basic arm and an outer arm, the basic arm is hinged on the rotary table, the outer arm is hinged on the basic arm, and the basic arm and the outer arm are driven by a telescopic device; the center lines of the rotary table, the basic arm and the outer arm are located in the same vertical plane, and the rotary table is a U-shaped structure.

[0007] Further, the telescopic device is connected between the side surface of the basic arm and the same side outer edge of the hollow structure of the rotary table.

[0008] Further, the telescopic device is connected between the side surfaces of the basic arm and the two side outer edges of the hollow structure of the rotary table.

[0009] Further, the outer arm is hinged with the basic arm and the telescopic device through a connecting mechanism.

[0010] Further, the rotary table is rotatable.

[0011] A folding-boom truck crane, comprising a movable support leg, a base and a boom, the support leg provides stable support for the whole crane, the base carries the boom of the crane, wherein the support leg is installed on the base, and the boom is installed on the base; the boom is a folding boom.

[0012] Further, the rotary table is installed on the base through a rotating mechanism.

[0013] Further, the crane is mounted on the carrier through the base.

[0014] Further, the crane further comprises a control unit.

[0015] The present application is mainly applied to the folding arm type truck crane, overcomes the structural stress concentration and the complex features caused by the basic arm partial load structure form of the folding arm type truck crane on the market, and reduces the production cost and design difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 : the folding arm type truck crane folding schematic diagram of the present application;

[0017] Figure 2 : the folding arm type truck crane structure schematic diagram of the present application;

[0018] Figure 3 : the rotating platform structure schematic diagram of the present application Figure 1 ;

[0019] Figure 4 : the rotating platform structure schematic diagram of the present application Figure 2 ;

[0020] Figure 5 : the outer arm structure schematic diagram of the present application;

[0021] In the drawing: 1. movable supporting leg, 2. operating system, 3. base, 4. rotating platform, 5. basic arm, 6. outer arm, 4-1. hydraulic oil cylinder seat, 4-2. lifting hydraulic oil cylinder, 5-1. front stretching hydraulic oil cylinder, 6-1. connecting mechanism. DETAILED DESCRIPTION

[0022] The technical scheme of the present application will be described in detail below through the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and the specific features in the embodiments are detailed description of the technical scheme of the present application, and not the limitation of the technical scheme of the present application, and the technical features in the embodiments and the embodiments can be combined with each other without conflict.

[0023] The term "and / or" in this paper is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a kind of "or" relationship.

[0024] As Figure 1 and Figure 2As shown, this invention provides a folding boom truck-mounted crane with advantages such as no eccentric loading and space saving; it includes movable outriggers 1, a control system 2, a base 3, a turntable 4, a main boom 5, and an outer boom 6. The outriggers 1 provide stable support for the entire crane. The control system 2 is the crane's control unit, used to operate the crane. The base 3 supports the crane's boom, with the outriggers 1 mounted on both sides of the base 3 to provide support for the crane, allowing it to be mounted on a carrier via the base 3. The turntable 4 is mounted on the base 3 via a rotating mechanism, used to rotate and adjust the direction of the boom. The crane's boom is connected to the turntable 4 and rotates with the turntable for lifting loads.

[0025] The boom of this invention includes a basic boom 5 and an outer boom 6. The rear end of the basic boom 5 is hinged to the upper end of a turntable 4 and rotates around the hinge point. The basic boom 5 is driven by a lifting hydraulic cylinder 4-2 to move relative to the turntable 4. The lifting hydraulic cylinder 4-2 controls the lifting and lowering movement of the basic boom 5 by extending and retracting. The rear end of the outer boom 6 is hinged to the front end of the basic boom 5 and rotates around the hinge point. The outer boom 6 is driven by a forward extension hydraulic cylinder 5-1 to move relative to the basic boom 5. The forward extension hydraulic cylinder 5-1 controls the extension and retraction movement of the outer boom 6 by extending and retracting. The lifting hydraulic cylinder 4-2 controls the basic boom 5 to descend closer to the turntable 4, and the forward extension hydraulic cylinder 5-1 controls the outer boom 6 to retract closer to the basic boom 5, thus folding the boom and forming the folding boom of this invention. Figure 1 As shown.

[0026] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, to achieve unbiased folding of the boom, the centerlines of the turntable 4, the main boom 5, and the outer boom 6 are located in the same vertical plane. The middle part of the turntable 4 is hollow, forming a U-shape to accommodate the outer boom 6. A hydraulic cylinder seat 4-1 is mounted on the outer edge of the hollow structure of the turntable 4, hinged to a lifting hydraulic cylinder 4-2. A pin hole is provided on the upper part of the turntable 4, hinged to the main boom 5. A pin hole is provided on the main boom 5, hinged to the lifting hydraulic cylinder 4-2, which is hinged to the side of the main boom 5 to avoid interfering with the folding of the outer boom 6. To ensure balanced force on the main boom 5, in this embodiment, lifting hydraulic cylinders 4-2 are hinged to both sides of the main boom 5, avoiding uneven force on one side of the main boom 5 when using a single-sided cylinder, which could lead to structural damage. The outer arm 6 is provided with a connecting mechanism 6-1. The basic arm 5 and the forward hydraulic cylinder 5-1 are hinged to the outer arm 6 through the connecting mechanism 6-1. The connecting mechanism 6-1 is provided with two sets of pin holes, which are used to hinge the basic arm 5 and the forward hydraulic cylinder 5-1 respectively.

[0027] The present invention eliminates the eccentric structure in the outer arm 6 structure of the boom; the turntable 4 structure is hollow, which makes up the space required for the folding of the outer arm structure, so that the structure does not interfere with each other after folding.

[0028] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A folding boom, comprising a turntable, a base boom, and an outer boom, wherein the base boom is hinged to the turntable, the outer boom is hinged to the base boom, and the base boom and the outer boom are driven by a telescopic device; characterized in that, The centerlines of the turntable, the main arm, and the outer arm are located in the same vertical plane, and the turntable has a U-shaped structure.

2. A folding boom according to claim 1, characterized in that, The basic arm side and the hollow structure of the turntable are connected by a telescopic device on the same side outer edge.

3. A folding boom according to claim 3, characterized in that, Telescopic devices are connected between the two sides of the basic arm and the outer edges of both sides of the hollow structure of the turntable.

4. A folding boom according to claim 1, characterized in that, The outer arm is hinged to the basic arm and the telescopic device via a connecting mechanism.

5. A folding boom according to claim 1, characterized in that, The turntable is rotatable.

6. A folding boom truck-mounted crane, comprising movable outriggers, a base, and a boom, wherein the outriggers provide stable support for the crane as a whole, and the base supports the boom of the crane, wherein the outriggers are mounted on the base, and the boom is mounted on the base; Its features are, The boom is a folding boom as described in any one of claims 1-4.

7. A folding boom truck-mounted crane according to claim 6, characterized in that, The turntable is mounted on the base via a rotating mechanism.

8. A folding boom truck-mounted crane according to claim 6, characterized in that, The crane is mounted on the carrier via a base.

9. A folding boom truck-mounted crane according to claim 6, characterized in that, The crane also includes a control unit.

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