Fly boom assembly and truck-mounted crane truck

Abstract

The utility model discloses a fly jib assembly and a lorry-mounted crane truck, and relates to the technical field of lorry-mounted cranes, the fly jib assembly is mounted at the far end of a suspension arm of a crane, and the fly jib assembly comprises a bolt jib head, a fly jib basic jib, a fly jib variable-amplitude oil cylinder, a first connecting rod and a second connecting rod; the near end of the bolt arm head is fixedly connected with the far end of a suspension arm of the crane through a positioning pin shaft, and the far end of the bolt arm head is hinged with the near end of the fly jib basic arm through a first connecting shaft; one end of the first connecting rod is hinged to the bolt arm head through a second connecting shaft, the other end of the first connecting rod is hinged to one end of the second connecting rod through a third connecting shaft, and the other end of the second connecting rod is hinged to the near end of the fly boom basic arm through a fourth connecting shaft; a cylinder body of the fly jib luffing oil cylinder is hinged with the fly jib basic jib through a fifth connecting shaft; and a piston rod of the fly jib luffing oil cylinder is connected with the third connecting shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of truck-mounted cranes, in particular to a flying arm assembly and a truck-mounted crane. Background Art

[0002] In recent years, with the rapid development of the application market and technology of truck-mounted cranes, cranes of various brands have continued to emerge, and the requirements for the crane's working radius, lifting height, and lifting performance and structural space are getting higher.

[0003] The working radius and lifting height of existing truck cranes are affected by the cross-section of the telescopic arm, the layout space of the telescopic cylinder, and the installation space of the whole machine. The working radius and lifting height will be limited. In order to obtain a larger working radius and lifting height, a connecting jib is often added, or a longer-arm truck crane with a larger tonnage is selected. Due to the structural characteristics of the straight-arm truck crane, the installation and removal of the jib are inefficient and difficult. At the same time, there are many restrictions on use, the adaptability to working conditions is very narrow, and the cost performance is low. It does not have an independent variable auxiliary mechanism and cannot change the angle as needed. It is difficult to operate and the lifting performance cannot be effectively exerted. The use of a longer-arm truck crane with a larger tonnage has high purchase and use costs. At the same time, there are problems with adaptability to working conditions and the economic benefits are low. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of the utility model is to provide a flying arm assembly and a truck-mounted crane to solve the problems of the working radius, lifting height, lifting performance, structural space and economic use of the truck-mounted crane.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a flying boom assembly, installed at the distal end of the boom of the crane, the flying boom assembly includes a latch arm head, a flying boom basic arm, a flying boom luffing cylinder, a first connecting rod and a second connecting rod; the proximal end of the latch arm head is fixedly connected to the distal end of the boom of the crane through a locating pin shaft, and the distal end of the latch arm head is hinged to the proximal end of the flying boom basic arm through a first connecting shaft; one end of the first connecting rod is hinged to the latch arm head through the second connecting shaft, the other end of the first connecting rod is hinged to one end of the second connecting rod through the third connecting shaft, and the other end of the second connecting rod is hinged to the proximal end of the flying boom basic arm through a fourth connecting shaft; the cylinder body of the flying boom luffing cylinder is hinged to the flying boom basic arm through a fifth connecting shaft, and the piston rod of the flying boom luffing cylinder is connected to the third connecting shaft.

[0006] A further improvement is that a fly boom telescopic arm is arranged at the far end of the fly boom basic arm, and a fly boom telescopic oil cylinder for driving the fly boom telescopic arm is arranged on the fly boom basic arm.

[0007] A further improvement is that the second connecting shaft is located between the first connecting shaft and the positioning pin shaft.

[0008] A further improvement is that the fifth connecting shaft is located near the far end of the flying boom basic arm.

[0009] The utility model also provides a truck-mounted crane vehicle, comprising a chassis and a crane arranged on the chassis, wherein the far end of the boom of the crane is connected with the above-mentioned flying boom assembly.

[0010] A further improvement is that a hydraulic hose reel and an oil pipe are provided on the boom of the crane, and the flying arm assembly is connected to the oil circuit of the whole machine through the hydraulic hose reel and the oil pipe.

[0011] A further improvement is that the crane is located at the front side of the chassis close to the cab.

[0012] A further improvement is that the crane is a straight-arm truck-mounted crane, comprising a rotating base and a boom, and a main luffing cylinder is arranged between the rotating base and the boom.

[0013] The beneficial effects of the utility model are:

[0014] The utility model can effectively improve the working radius, lifting height, lifting performance, structural space, and economic use of truck cranes, and enhance the value of the whole machine / vehicle. It is independently forked and pin-limited assembled with the final arm of the main telescopic arm; the connecting arm head is hinged with the pin of the telescopic basic arm of the flying arm, and is driven by a hydraulic variable auxiliary cylinder and a connecting rod mechanism to realize the deployment, folding and resetting of the flying arm; the multi-stage telescopic arm of the flying arm adopts a hydraulic cylinder to control the extension and retraction. It realizes a multifunctional, humanized, integrated and compact space design, and the assembly can be installed in place with the main arm at one time (with strong connection and load-bearing capacity and high safety), avoiding multiple adjustments, and greatly improving the assembly and use efficiency of the whole machine / vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of the flying arm assembly in the embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a truck-mounted crane in an embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of the flying arm assembly of the truck-mounted crane in the embodiment of the utility model after being unfolded;

[0018] Figure 4 It is a schematic diagram of the lifting arm of the truck-mounted crane in the embodiment of the utility model.

[0019] Reference numerals:

[0020] 1-flying boom assembly; 101-latch arm head; 102-flying boom basic arm; 103-flying boom luffing cylinder; 104-first connecting rod; 105-second connecting rod; 106-positioning pin shaft; 107-first connecting shaft; 108-second connecting shaft; 109-third connecting shaft; 110-fourth connecting shaft; 111-fifth connecting shaft; 112-flying boom telescopic arm; 113-flying boom telescopic cylinder;

[0021] 2-crane; 21-rotating base; 22-jib; 23-main luffing cylinder; 24-hydraulic hose reel; 25-oil pipe;

[0022] 3-chassis; 31-cab. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0024] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0026] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, but cannot be understood as limiting the utility model.

[0027] See also Figure 1As shown, the embodiment of the utility model provides a flying boom assembly, which is installed at the far end of the boom 22 of the crane 2, and the flying boom assembly includes a latch arm head 101, a flying boom basic arm 102, a flying boom luffing cylinder 103, a first connecting rod 104 and a second connecting rod 105;

[0028] The proximal end of the latch arm head 101 is fixedly connected to the distal end of the boom 22 of the crane 2 through a positioning pin shaft 106, and the distal end of the latch arm head 101 is hinged to the proximal end of the flying arm basic arm 102 through a first connecting shaft 107; specifically, a flying arm telescopic arm 112 is provided at the distal end of the flying arm basic arm 102, and a flying arm telescopic cylinder 113 for driving the flying arm telescopic arm 112 is provided on the flying arm basic arm 102.

[0029] One end of the first connecting rod 104 is hinged to the latch arm head 101 through the second connecting shaft 108, the other end of the first connecting rod 104 is hinged to one end of the second connecting rod 105 through the third connecting shaft 109, and the other end of the second connecting rod 105 is hinged to the proximal end of the flying arm basic arm 102 through the fourth connecting shaft 110; specifically, the second connecting shaft 108 is located between the first connecting shaft 107 and the positioning pin shaft 106.

[0030] The cylinder body of the fly boom luffing cylinder 103 is hinged to the fly boom basic arm 102 through the fifth connecting shaft 111, and the piston rod of the fly boom luffing cylinder 103 is connected to the third connecting shaft 109. Specifically, the fifth connecting shaft 111 is located at a position close to the far end of the fly boom basic arm 102.

[0031] See also Figure 2 to Figure 4 As shown, the embodiment of the utility model also provides a truck-mounted crane vehicle, including a chassis 3 and a crane 2 arranged on the chassis 3, and the far end of the boom 22 of the crane 2 is connected to the above-mentioned flying arm assembly 1. Specifically, a hydraulic hose reel 24 and an oil pipe 25 are arranged on the boom 22 of the crane 2, and the flying arm assembly 1 is connected to the oil circuit of the whole machine through the hydraulic hose reel 24 and the oil pipe 25. The crane 2 is located at the front side of the chassis 3 near the cab 31. In this embodiment, the crane 2 is a straight-arm truck-mounted crane 2, including a rotating base 21 and a boom 22, and a main boom cylinder 23 is arranged between the rotating base 21 and the boom 22.

[0032] The working principle of the utility model is:

[0033] The integrated design of the hydraulic flying arm of the straight-arm truck crane integrates the connection between the flying arm and the main arm, the telescopic boom, the flying arm change-over, the connecting rod mechanism, and the oil line transmission connection. The structure is compact; the structure, usage characteristics, and working pain points of the straight-arm truck crane make full use of the amplitude change, folding characteristics, and integrated design to achieve easy installation, easy use, and matching design. The flying arm assembly can be folded and placed below the telescopic arm assembly of the main arm of the straight-arm truck crane, without occupying the height space of the entire vehicle.

[0034] The utility model effectively increases the working radius and lifting height of the truck crane and improves the operating capacity without changing the main structure of the whole machine, the tonnage model, and the space layout of the whole machine / vehicle. The structure is embodied as follows: the flying arm assembly is forked and pin-limited with the final arm of the main telescopic arm as an independent assembly component, and the oil circuit is connected to the main machine oil circuit through a hydraulic hose reel and an oil pipe. The connecting arm head is hinged with the pin of the telescopic basic arm of the flying arm, and is driven by a hydraulic variable auxiliary oil cylinder and a connecting rod mechanism to realize the unfolding, folding and resetting of the flying arm; the multi-stage telescopic arm of the flying arm adopts a hydraulic oil cylinder to control the extension and retraction.

[0035] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0036] Through the description of the above structure and principle, technicians in the relevant technical field should understand that the present invention is not limited to the above-mentioned specific implementation methods. Improvements and substitutions based on the present invention using the known technology in the field all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A flying arm assembly, mounted at the distal end of a boom (22) of a crane (2), characterized in that: The flying boom assembly comprises a latch arm head (101), a flying boom basic arm (102), a flying boom luffing cylinder (103), a first connecting rod (104) and a second connecting rod (105); The proximal end of the latch arm head (101) is fixedly connected to the distal end of the boom (22) of the crane (2) via a positioning pin shaft (106), and the distal end of the latch arm head (101) is hinged to the proximal end of the flying boom basic arm (102) via a first connecting shaft (107); One end of the first connecting rod (104) is hinged to the latch arm head (101) via a second connecting shaft (108), the other end of the first connecting rod (104) is hinged to one end of the second connecting rod (105) via a third connecting shaft (109), and the other end of the second connecting rod (105) is hinged to the proximal end of the flying arm basic arm (102) via a fourth connecting shaft (110); The cylinder body of the flying boom luffing oil cylinder (103) is hinged to the flying boom basic arm (102) via a fifth connecting shaft (111), and the piston rod of the flying boom luffing oil cylinder (103) is connected to the third connecting shaft (109).

2. The flying arm assembly according to claim 1, characterized in that: A flying boom telescopic arm (112) is arranged at the far end of the flying boom basic arm (102), and a flying boom telescopic oil cylinder (113) for driving the flying boom telescopic arm (112) is arranged on the flying boom basic arm (102).

3. The flying arm assembly according to claim 1, characterized in that: The second connecting shaft (108) is located between the first connecting shaft (107) and the positioning pin shaft (106).

4. The flying arm assembly according to claim 1, characterized in that: The fifth connecting shaft (111) is located near the far end of the fly arm basic arm (102).

5. A truck-mounted crane, comprising a chassis (3) and a crane (2) arranged on the chassis (3), characterized in that: The far end of the boom (22) of the crane (2) is connected to a flying boom assembly (1) as claimed in any one of claims 1 to 4.

6. The truck-mounted crane according to claim 5, characterized in that: A hydraulic hose reel (24) and an oil pipe (25) are provided on the boom (22) of the crane (2), and the flying boom assembly (1) is connected to the oil circuit of the whole machine through the hydraulic hose reel (24) and the oil pipe (25).

7. The truck-mounted crane according to claim 5, characterized in that: The crane (2) is located at the front side of the chassis (3) and close to the cab (31).

8. The truck-mounted crane according to claim 5, characterized in that: The crane (2) is a straight-arm truck-mounted crane (2), comprising a rotating base (21) and a boom (22), and a main luffing oil cylinder (23) is arranged between the rotating base (21) and the boom (22).

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