Lorry-mounted crane with four-direction operating mechanism

Abstract

The utility model discloses a lorry-mounted crane with a four-direction operating mechanism, which belongs to the field of lorry-mounted cranes and comprises a lorry-mounted crane body, a group of landing leg structures with the same structure are arranged on the lorry-mounted crane body, and the landing leg structures are arranged on the lorry-mounted crane body. The arc-shaped arms are arranged on the two sides of each longitudinal stand column in the supporting leg structure, so that the arc-shaped arms can be unfolded in the lifting process to further support the longitudinal stand columns from the two sides, the supporting structural strength of the longitudinal stand columns is improved, the contact area between the longitudinal stand columns and the ground is increased, and the supporting stability of the supporting leg structure is improved; and the safety in the lifting process can be improved.

Description

Technical Field

[0001] The utility model relates to the field of truck-mounted cranes, and more specifically, to a truck-mounted crane with a four-position operating mechanism. Background Art

[0002] There are three operating modes for a truck-mounted crane (truck-mounted crane): upper operation, middle operation and lower operation. The middle operation has two operating positions, namely three-position and four-position. The operating lever group located at the top of the four-position operating position is used to control the operating valve of the crane, and the operating lever group located on the side of the four-position operating position is used to control the operating valves of the front and rear legs.

[0003] Although the truck-mounted crane with a four-position operating mechanism has many advantages in actual use, the inventors found in actual use that its outrigger mechanism still has a relatively simple structure. During the lifting process, it can only rely on the extended telescopic outriggers to contact the ground for support, which is not conducive to the structural stability of the outrigger structure support during the lifting process. Therefore, we proposed a truck-mounted crane with a four-position operating mechanism to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a truck-mounted crane with a four-position operating mechanism. By arranging arc arms on both sides of each longitudinal column in the outrigger structure, the arc arms can be unfolded during the lifting process to further support the longitudinal columns from both sides, thereby improving the structural strength of the longitudinal column support and the contact area with the ground, increasing the stability of the outrigger structure when supporting, and facilitating improving the safety during the lifting process.

[0006] 2. Technical solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A truck-mounted crane with a four-position operating mechanism comprises a truck-mounted crane body, wherein the truck-mounted crane body is provided with a group of leg structures with the same structure, the leg structure comprises a cross beam, a cross telescopic beam and a longitudinal column fixedly welded to the end of the cross telescopic beam, the longitudinal column is slidably connected with the telescopic leg inside, arc-shaped arms with the same structure are provided on both sides of the longitudinal column, and the top ends of the two arc-shaped arms are rotatably connected by a group of locating pins, and one end of a group of locating pins is fixedly welded to both sides of the longitudinal column, and sliding bars are also fixedly welded on both sides of the longitudinal column, and sliders are slidably connected to the two sliding bars, and locating pins are fixedly welded on the outer sides of the two sliders, and a group of pull rods are rotatably connected to the two locating pins, and the bottoms of the pull rods are rotatably connected to the corresponding side walls of the arc arms.

[0009] Furthermore, a connecting shaft is fixedly welded to the top of the longitudinal column through a group of reinforced square steels, hydraulic cylinders are provided at both ends of the connecting shaft, and the shaft ends at both ends of the connecting shaft are respectively rotatably connected to the top of the corresponding hydraulic cylinder body, and the bottoms of the telescopic rods of the two hydraulic cylinders are respectively rotatably connected to the two ends of the corresponding positioning pins.

[0010] Furthermore, a through hole is provided on the transverse telescopic beam at the connection between the hydraulic cylinder body and the transverse telescopic beam, and the hydraulic cylinder body extends to the bottom of the transverse telescopic beam through the through hole.

[0011] Furthermore, a group of reinforcing rods are fixedly welded inside the arc-shaped arm, and the end of one end of the arc-shaped arm is rotatably connected to a grounding foot plate 1, and the end of the bottom of the telescopic leg is fixedly installed with a grounding foot plate 2.

[0012] Furthermore, the arc-shaped arm has an arc-shaped structure, and the length of the arc-shaped arm is greater than the height of the longitudinal column.

[0013] 3. Beneficial effects

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) In this solution, arc-shaped arms are arranged on both sides of each longitudinal column in the outrigger structure, so that the arc-shaped arms can be unfolded during the lifting process to further support the longitudinal columns from both sides, thereby improving the structural strength of the longitudinal column support and the contact area with the ground, increasing the stability of the outrigger structure during support, and facilitating improving the safety during the lifting process;

[0016] (2) In this solution, the two arc-shaped arms on each longitudinal column are driven by two hydraulic cylinders, which has a stronger driving force, thereby increasing the strength of the two arc-shaped arms in unfolding the support, which is beneficial to the stability of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the enlarged structure of a part of the longitudinal column of the utility model;

[0019] Figure 3 It is a schematic structural diagram of the connection between the second positioning pin and the pull rod of the utility model.

[0020] Description of the numbers in the figure:

[0021] 1. Truck crane body; 2. Crossbeam; 3. Horizontal telescopic beam; 301. Through hole; 4. Longitudinal column; 5. Arc arm; 501. Reinforcement rod; 502. Grounding foot plate 1; 6. Locating pin 1; 7. Slide bar; 8. Sliding block; 9. Locating pin 2; 10. Pull rod; 11. Reinforced square steel; 12. Connecting shaft; 13. Hydraulic cylinder; 14. Grounding foot plate 2. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention specification; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0023] Embodiment 1:

[0024] See also Figure 1-Figure 3 A truck-mounted crane with a four-position operating mechanism comprises a truck-mounted crane body 1, a group of leg structures with the same structure are arranged on the truck-mounted crane body 1, the leg structure comprises a cross beam 2, a cross telescopic beam 3 and a longitudinal column 4 fixedly welded to the end of the cross telescopic beam 3, the longitudinal column 4 is slidably connected with the telescopic leg, both sides of the longitudinal column 4 are provided with arc-shaped arms 5 with the same structure, and the top ends of the two arc-shaped arms 5 are rotatably connected through a group of positioning pins 6, one end of a group of positioning pins 6 is fixedly welded to both sides of the longitudinal column 4, and the two sides of the longitudinal column 4 are also fixedly welded There is a slide bar 7, and both slide bars 7 are slidably connected with a slider 8, and the outer sides of the two sliders 8 are fixedly welded with a positioning pin 9, and the two positioning pins 9 are rotatably connected with a group of pull rods 10, and the bottoms of the pull rods 10 are rotatably connected with the corresponding side walls of the arc-shaped arms 5, and a connecting shaft 12 is fixedly welded with a group of reinforced square steels 11 on the top of the longitudinal column 4. Hydraulic cylinders 13 are arranged at both ends of the connecting shaft 12, and the shaft ends at both ends of the connecting shaft 12 are rotatably connected with the tops of the corresponding cylinder bodies of the hydraulic cylinders 13, and the bottoms of the telescopic rods of the two hydraulic cylinders 13 are rotatably connected with the corresponding ends of the positioning pins 9.

[0025] The arc-shaped arm support principle of this truck-mounted crane with a four-position operating mechanism is:

[0026] When the truck crane body 1 needs to perform a lifting task, first, a group of transverse telescopic beams 3 and telescopic legs of the leg structure are unfolded through the corresponding operating lever group on the truck crane body 1 to support the body structure of the truck crane body 1 (this is an existing known public technology, so it will not be described in detail here), and then the corresponding operating lever group on the truck crane body 1 controls the telescopic rods of a group of hydraulic cylinders 13 located on each longitudinal column 4 to extend, and the corresponding slider 8 together with the positioning pin 2 9 is pushed downward along the slide bar 7, and the corresponding two arc-shaped arms 5 are driven to open through the connection of the pull rod 10 on the positioning pin 2 9 until they are in contact with the ground through the grounding foot plate 1 502 to achieve the supporting effect. When retracting the arc-shaped arms 5, it is only necessary to control the telescopic rods of a group of hydraulic cylinders 13 located on each longitudinal column 4 to contract, drive the corresponding slider 8 together with the positioning pin 2 9 to move upward along the slide bar 7, and the corresponding two arc-shaped arms 5 can be driven to merge and contract upward through the connection of the pull rod 10 on the positioning pin 2 9, so as to facilitate the subsequent transfer work.

[0027] Embodiment 2:

[0028] In view of the above embodiment 1, for further description, refer to Figure 3 A through hole 301 is provided on the transverse telescopic beam 3 at the connection between the cylinder body of the hydraulic cylinder 13 and the transverse telescopic beam 3. The cylinder body of the hydraulic cylinder 13 extends to the bottom of the transverse telescopic beam 3 through the through hole 301. A group of reinforcing rods 501 are fixedly welded inside the arc arm 5, and the end of one end of the arc arm 5 is rotatably connected to a grounding foot plate 1 502, and a grounding foot plate 2 14 is fixedly installed at the end of the bottom of the telescopic leg. The arc arm 5 has an arc-shaped structure, and the length of the arc arm 5 is greater than the height of the longitudinal column 4.

[0029] The through hole 301 provided can provide an avoidance channel for the installation of the corresponding hydraulic cylinder 13 to prevent interference. The setting of the grounding foot 1 502 and the grounding foot 2 14 can increase the contact area with the ground, and the foundation settlement is not likely to occur. The length of the arc arm 5 is greater than the height of the longitudinal column 4, which can prevent the arc arm 5 from being unable to contact the ground after being unfolded due to being too short.

[0030] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A truck-mounted crane with a four-position operating mechanism, comprising a truck-mounted crane body (1), characterized in that: The truck-mounted crane body (1) is provided with a group of leg structures with the same structure, and the leg structure includes a cross beam (2), a cross telescopic beam (3) and a longitudinal column (4) fixedly welded to the end of the cross telescopic beam (3). The longitudinal column (4) is slidably connected with a telescopic leg inside. Both sides of the longitudinal column (4) are provided with arc-shaped arms (5) with the same structure, and the top ends of the two arc-shaped arms (5) are rotatably connected through a group of positioning pins (6). One end of a group of positioning pins (6) is fixedly welded to both sides of the longitudinal column (4). Slide bars (7) are also fixedly welded to both sides of the longitudinal column (4). Both slide bars (7) are slidably connected with sliders (8), and both sliders (8) are fixedly welded with positioning pins (9) on their outer sides. Both positioning pins (9) are rotatably connected with a group of pull rods (10), and the bottoms of the pull rods (10) are rotatably connected to the corresponding side walls of the arc-shaped arms (5).

2. A truck-mounted crane with a four-position operating mechanism according to claim 1, characterized in that: A connecting shaft (12) is fixedly welded to the top of the longitudinal column (4) via a group of reinforcing square steels (11), and hydraulic cylinders (13) are provided at both ends of the connecting shaft (12), and the shaft ends at both ends of the connecting shaft (12) are respectively rotatably connected to the top of the cylinder body of the corresponding hydraulic cylinder (13), and the bottoms of the telescopic rods of the two hydraulic cylinders (13) are respectively rotatably connected to the two ends of the corresponding positioning pins (9).

3. A truck-mounted crane with a four-position operating mechanism according to claim 2, characterized in that: A through hole (301) is provided on the transverse telescopic beam (3) at the connection between the cylinder body of the hydraulic cylinder (13) and the transverse telescopic beam (3), and the cylinder body of the hydraulic cylinder (13) extends to the bottom of the transverse telescopic beam (3) through the through hole (301).

4. The truck-mounted crane with a four-position operating mechanism according to claim 1, characterized in that: A group of reinforcing rods (501) are fixedly welded inside the arc-shaped arm (5), and the end of one end of the arc-shaped arm (5) is rotatably connected to a grounding foot plate 1 (502), and the end of the bottom of the telescopic leg is fixedly installed with a grounding foot plate 2 (14).

5. The truck-mounted crane with a four-position operating mechanism according to claim 1, characterized in that: The arc-shaped arm (5) is in an arc-shaped structure, and the length of the arc-shaped arm (5) is greater than the height of the longitudinal column (4).

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