Wing-shaped support for arm support and crane auxiliary arm

Abstract

The wing-shaped support comprises a support body and a mounting seat which is used for connecting the arm support and the support body and rotates back and forth along with the support body, the support body is symmetrically arranged on two sides of the mounting seat, two hinge points are arranged at the bottom of the support body, one hinge point is connected with the mounting seat, and the other hinge point is connected with the mounting seat. A driving mechanism is arranged between the other hinge point and the frame body and drives the frame body to be unfolded left and right. According to the utility model, the frame body is arranged at the top of the arm support by arranging the mounting seat, and when the frame body is driven to be folded, the whole frame body lies on the top of the arm support, so that the width of the support is reduced, and the transition, the frame body driven to be unfolded and the execution of a supporting function are facilitated. The number of hinge points of the frame body and the mounting frame is increased, and the stability of the frame body in the connecting and unfolding state is greatly improved.

Description

Technical Field

[0001] The utility model relates to a crane accessory, in particular to an airfoil bracket for a boom, and also relates to a jib of a crane. Background Art

[0002] The lifting boom of a crane is used to improve the stability and lifting performance of the boom system. With the continuous improvement of the market demand for wind power hoisting performance, the cross-sectional size of the jib boom has also increased, restricting the product's transportation during transfer.

[0003] The patent application for invention with the publication number CN 102267670 A discloses a connecting frame and a boom system and a hoisting machine having the connecting frame. Among them, the connecting frame is composed of two cylinders, forming an inverted V shape. One cylinder is hinged on the upper surface of the extension section, and the other cylinder is hinged on the side surface of the extension section. A rib plate for enhancing the stability of the support is connected between the two cylinders. The cross-section of the rib plate is trapezoidal. In the non-working state, the connecting frame retracts towards the extension section and lies on the extension section, as Figure 1 shown. This solution reduces the folding longitudinal interface width of the boom system by changing the rib plate structure, but the reduction range is limited. The utility model patent application with the publication number CN217708667 U discloses a superlift device, a lifting arm assembly and a crane. The superlift boom mechanism includes a superlift support, a deployment mechanism and two superlift masts. The superlift support is pivotally arranged on the main boom. The two superlift masts are symmetrically arranged about the center line of the main boom and are respectively pivotally arranged on the superlift support. The deployment mechanism is located between the two superlift masts and is arranged on the superlift support, including a deployment driving member and two push struts. The deployment driving member drives the two superlift masts to perform opening or closing actions through two push rods. In this solution, only one deployment mechanism is used for driving, resulting in poor stability. Summary of the Utility Model

[0004] Purpose of the Utility Model: The purpose of the present utility model is to provide an airfoil bracket for a boom that can reduce the longitudinal width and improve the stability. Another purpose of the present utility model is to provide a jib of a crane that can reduce the longitudinal width.

[0005] Technical Solution: An airfoil bracket for a boom according to the present utility model includes a frame body, a mounting seat for connecting the boom and the frame body and rotating forward and backward with the frame body. The frame bodies are symmetrically arranged on both sides of the mounting seat. Two hinge points are provided at the bottom of the frame body. One hinge point is connected to the mounting seat, and a driving mechanism is provided between the other hinge point and the frame body to drive the frame body to expand left and right.

[0006] In the present utility model, the frame is installed on the top of the boom through the installation seat. When the frame is driven to close, it lies prone on the top of the boom as a whole, reducing the width of the support, which is beneficial for the transfer. When the frame is driven to unfold, it performs the support function. The hinge points between the frame and the installation frame are increased, greatly improving the stability of the connection and unfolded state of the frame.

[0007] Preferably, the driving mechanism is a telescopic driving mechanism, and the driving mechanism is symmetrically hinged in the middle or on both sides of the installation seat.

[0008] Preferably, a limiting mechanism is provided between the frame and the driving mechanism. The limiting mechanism includes a pull plate with a chute and a sliding pin. The pull plate and the sliding pin are respectively connected to the frame and the driving mechanism. The sliding pin is sleeved in the chute. When the driving mechanism drives the frame to rotate, the sliding pin slides along the chute.

[0009] Preferably, the frame is a trapezoidal support.

[0010] Preferably, the frame is a truss structure or a box structure formed by splicing chord members and web members, and the bottom of the chord member is connected to the driving mechanism.

[0011] Preferably, a rib member and an inclined rib are further provided between the chord member and the driving mechanism. A triangle is formed by enclosing the rib member, the chord member, and the rib. It makes room for the installation of the telescopic mechanism and increases the stability of the frame at the same time.

[0012] Preferably, a front pull plate and a rear pull plate are respectively rotatably connected to the front and rear sides of the top of the frame.

[0013] A jib of a crane according to the present utility model includes the wing-shaped support described above, and the installation seat is hinged to the top of the middle frame of the jib along the width direction of the jib.

[0014] Beneficial effects: Compared with the prior art, the present utility model has the following advantages: 1. It reduces the longitudinal width of the wing-shaped support while improving the stability; 2. It reduces the self-weight of the support; 3. The structure is simple. Description of the Drawings

[0015] Figure 1 It is a side view of the assembled structure of the jib and the support in the prior art;

[0016] Figure 2 It is a schematic diagram of the assembled structure of the jib for the boom and the support of the present utility model;

[0017] Figure 3 It is a schematic diagram of the folded state structure of the support of the present utility model;

[0018] Figure 4 It is a schematic diagram of the closed structure of the support of the present utility model;

[0019] Figure 5Schematic diagram of the bracket unfolding structure of the present utility model. Specific implementation mode

[0020] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0021] Embodiment 1: As Figure 2 , Figure 4 , Figure 5 shown, the present utility model discloses an airfoil bracket 2 for a boom. The airfoil bracket 2 mainly consists of a mounting seat frame body 21 and a mounting seat 22.

[0022] The mounting seat 22 is the base of the frame body 21. The mounting seat 22 is arranged along the width direction of the boom. A number of connecting seats are provided on one side of the bottom. The connecting seats are used for hinging with the top of the boom, so that the mounting seat 22 rotates around the width direction / front and back (the head close to the overhanging part of the boom is the front) of the boom under the push of the driving mechanism, driving the frame body 21 to rotate back and forth. This driving mechanism can be a telescopic oil cylinder, or a mechanism with a telescopic function driven by a motor such as a pulley and a connecting rod.

[0023] The frame body 21 is hinged on the left and right sides of the mounting seat 22, and is pushed by the driving mechanism 24 to move closer together left and right for easy transfer, or move relatively away to expand and increase the left and right span of the frame body 21.

[0024] There are two inner and outer hinge points 23 between the bottom of the frame body 21 and the mounting seat 22. The outer side of the frame body 21 is hinged to the mounting seat, and a driving mechanism 24 is provided on the inner side and is hinged to the mounting seat 22 through the driving mechanism 24. The driving mechanism is a telescopic driving mechanism. When the driving mechanism 24 extends, it pushes the left and right frame bodies 21 to move away in the opposite direction and unfold. The driving mechanism can be a telescopic oil cylinder, or a mechanism with a telescopic function driven by a motor such as a pulley and a connecting rod.

[0025] A limiting mechanism 25 is provided between the frame body 21 and the driving mechanism. For example: a pull plate 251 is provided outside the frame body 21, a chute is provided inside the pull plate 251, the driving mechanism 24 is a telescopic driving mechanism, a sliding pin 252 is provided outside the driving mechanism 24, and the sliding pin 252 is sleeved in the chute. When the frame body 21 unfolds or closes, the sliding pin 252 slides in the chute. The driving mechanism 24 can be an oil cylinder: the inner side of the frame body 21 is connected to the piston rod of the telescopic oil cylinder, the mounting seat 22 is hinged to the bottom of the cylinder barrel of the telescopic oil cylinder, the pull plate 251 is connected to the frame body 21, and the sliding pin 252 is arranged outside the cylinder barrel of the telescopic oil cylinder.

[0026] The frame 21 is a trapezoidal frame, small at the top and large at the bottom. The frame 21 can be a truss structure or a box structure. Taking the truss structure as an example: The frame 21 is mainly composed of two inner and outer chord members 211 and 212. The inner chord member 211 and the outer chord member 212 are fixedly connected at the top. Several inclined web members 214 are arranged between the inner chord member 211 and the outer chord member 212 to increase the self-strength of the frame 21 and reduce the self-weight of the frame 21. The bottom of the inner chord member 211 is connected to the driving mechanism 24, and the bottom of the outer chord member 212 is hinged to the mounting seat 22. The length of the outer chord member 212 is less than that of the inner chord member 211, and reducing the length of the outer chord member 212 makes room for the installation of the driving mechanism 24.

[0027] Transverse stiffening bars 214 and inclined ribs 215 are provided at the bottoms of the inner chord member 211 and the outer chord member 212. The part of the outer chord member 212 that is longer than the inner chord member 211, together with the stiffening bars 214 and the ribs 215, encloses a triangle, which increases the strength of the bottom of the frame 21.

[0028] When the frame 21 is a box structure, the chord members 211, 212 and the web members 214 are respectively box structures formed by splicing plates.

[0029] The front and rear sides of the top of the frame 21 are respectively hinged with a front pull plate 3 and a rear pull plate 1. The front pull plate 3 is used to connect with the head of the boom, and the rear pull plate 1 is used to connect with the superlift hoisting device.

[0030] Taking the auxiliary boom of a crane as an example, as Figure 3 shown, during assembly, the front end of the middle skeleton 4 is connected to the skeleton 6 and the boom head 7, and the rear end is connected to the main boom connection structure 5 to assemble the auxiliary boom of the crane. The mounting seat 22 is installed on the top surface of the middle skeleton 4 in the width direction. Its front pull plate 3 is connected to the boom head 7, and the rear pull plate 1 is connected to the superlift hoisting device (not shown) through a steel wire rope. In the working state, the top end of the frame 21 is lifted by relying on the superlift hoisting device, and then is driven to unfold left and right by the driving mechanism 24; in the non-working state, the frame 21 folds towards the middle skeleton 4, and the front pull plate 3 falls into the top groove of the middle skeleton 4, and the whole is stacked on the top of the auxiliary boom.

[0031] Embodiment 2: On the basis of Embodiment 1, the following deformation can also be made in this embodiment: The inner side of the frame 21 is hinged to the mounting seat 22, and a driving mechanism 24 is provided on the outer side and is hinged to the mounting seat 22 through the driving mechanism 24. The driving mechanism 24 is a telescopic driving mechanism. When the driving mechanism 24 retracts, it drives the left and right frames 21 to move away from each other in the reverse direction and unfold. The length of the inner chord member 211 of the frame 21 is greater than that of the outer chord member 212.

Claims

1. An airfoil bracket for a boom, comprising a frame body (21) and a mounting seat (22) for connecting the boom and the frame body and rotating forward and backward with the frame body, characterized in that, The frame body (21) is symmetrically arranged on both sides of the mounting seat (22). Two hinge points (23) are provided at the bottom of the frame body (21). One hinge point (23) is connected to the mounting seat (22), and a driving mechanism (24) is provided between the other hinge point (23) and the mounting seat (22). The driving mechanism drives the frame body (21) to expand left and right.

2. The airfoil bracket for the boom according to claim 1, wherein The driving mechanism (24) is a telescopic driving mechanism, and the driving mechanism (24) is symmetrically hinged in the middle or on both sides of the mounting seat (22).

3. The airfoil bracket for the boom according to claim 1, characterized in that, A limiting mechanism (25) is provided between the frame body (21) and the driving mechanism (24). The limiting mechanism includes a pull plate (251) provided with a sliding groove and a sliding pin (252). The pull plate (251) and the sliding pin (252) are respectively connected to the frame body and the driving mechanism. The sliding pin is sleeved in the sliding groove. The driving mechanism (24) drives the frame body (21) to rotate, and the sliding pin slides along the sliding groove.

4. The airfoil bracket for the boom according to claim 1, characterized in that, The frame body (21) is a trapezoidal bracket.

5. The airfoil bracket for the boom according to claim 1 or 4, characterized in that, The frame body (21) is a truss structure or a box-shaped structure formed by splicing chord members and web members (213), and the bottom of the chord member is connected to the driving mechanism (24).

6. The airfoil bracket for a boom according to claim 1, characterized in that, The front and rear sides of the top of the frame body (21) are respectively rotatably connected to a front pull plate (3) and a rear pull plate (1).

7. An auxiliary boom of a crane, characterized in that, Including the airfoil bracket described in claim 1, the mounting seat is hinged to the top of the middle skeleton (4) of the auxiliary arm along the width direction of the auxiliary arm.

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