Suspension arm of straight-arm double-winch lorry-mounted crane

Abstract

The utility model discloses a suspension arm of a straight-arm double-winch lorry-mounted crane and relates to the technical field of cranes, the suspension arm comprises an outer support, an inner support is movably inserted into one end of the outer support, a supporting plate is fixedly arranged on the inner surface of the outer support, a motor is arranged at one end of the supporting plate, and the output end of the motor penetrates through the supporting plate and is fixedly provided with a lead screw; according to the suspension arm of the straight-arm double-winch lorry-mounted crane, through the sleeving design of the inner support and the outer support, the length of the suspension arm can be conveniently adjusted, the adjusting structure is simple in design and reliable to use, the suspension arm is convenient to use, the labor intensity of workers is reduced, and the service life of the workers is prolonged. The lifting arm structure is high in strength and is more stable and reliable when being used as a lifting arm of the crane, and through the design of the two lifting structures, the lifting stability is improved, and the universality of the crane is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of cranes, and particularly to the boom of a straight-arm double-winch truck-mounted crane. Background Art

[0002] A straight-arm double-winch truck-mounted crane is a device installed on a truck, which realizes the lifting, slewing, and hoisting of goods through a hydraulic lifting and telescoping system. It is usually composed of components such as a truck chassis, a crane, a sub-frame, a cargo box, and a power take-off device.

[0003] Upon inspection, the publication number: CN203065052U discloses a boom of a crane. In this technology, it is disclosed that "including a boom body, the boom body includes a first-stage boom, a middle-stage boom, and a tail-stage boom. One end of the first-stage boom is equipped with a pulley mechanism, and the other end is fixedly connected to one end of the middle-stage boom through a connecting device. The other end of the middle-stage boom is fixedly connected to one end of the tail-stage boom through a connecting device. The other end of the tail-stage boom is hinged on a boom support. The first-stage boom, the middle-stage boom, and the tail-stage boom are all composed of four vertical rods distributed in a square shape and a plurality of reinforcing rods arranged between adjacent vertical rods. The vertical rods and the reinforcing rods are all steel pipes with a circular structure, etc. technical solutions, which have the technical effects of greatly reducing the wind resistance received by it, and the first-stage boom, the middle-stage boom, and the tail-stage boom are connected to each other through a connecting device, with firm connection, simple structure, and easy implementation".

[0004] Regarding the above related technologies, the inventor believes that the existing booms of cranes are not convenient for adjusting the overall length of the boom. Since the items that the crane needs to lift often need to be adjusted frequently in position, if the length of the boom structure is fixed, the use of the crane will be greatly limited. And most boom structures can only install one hoisting mechanism, so the hoisting stability is limited and large objects cannot be handled, and there are limitations in use. Therefore, a boom of a straight-arm double-winch truck-mounted crane is needed to solve the above problems. Summary of the Utility Model

[0005] The purpose of this application is to provide a boom of a straight-arm double-winch truck-mounted crane to improve the problems of inconvenient adjustment of the overall length of the boom and only being able to install one hoisting mechanism.

[0006] The boom of the straight-arm double-winch truck-mounted crane provided by this application adopts the following technical solutions:

[0007] The boom of a straight-arm double winch truck-mounted crane includes an outer bracket. One end of the outer bracket is movably inserted with an inner bracket. A support plate is fixedly provided on the inner surface of the outer bracket. One end of the support plate is provided with a motor. The output end of the motor penetrates through the support plate and is fixedly provided with a lead screw. A moving block is threadedly sleeved on the outer surface of the lead screw. The outer surface of the moving block is fixedly connected to the inner surface of the inner bracket. Two connecting columns are fixedly provided at one end of the support plate. A limiting plate is fixedly provided at the same-side ends of the two connecting columns.

[0008] By adopting the above technical solution, the overall length of the adjustable boom structure can be adjusted, thereby improving the working effect of hoisting.

[0009] Optionally, one end of the inner bracket is fixedly provided with a vertical plate, and a connecting block is fixedly provided at the outer end of the vertical plate. A support column is fixedly provided at the lower end of the connecting block. Side shafts are fixedly provided at both ends of the support column. A rotating shaft is rotatably provided between the side shaft and the support column. A support shaft is provided at the lower end of the rotating shaft. A hook is fixedly provided at the lower end of the support shaft. A steel cable is provided at one end of the rotating shaft.

[0010] By adopting the above technical solution, the design of two hoisting structures improves the hoisting stability and greatly improves the versatility of the crane.

[0011] Optionally, the outer bracket and the inner bracket have the same shape, and the size ratio of the outer bracket to the inner bracket is three to two. The outer bracket includes four support rods. The four support rods are distributed in a rectangle. A plurality of X-shaped frames are fixedly provided between two adjacent support rods.

[0012] By adopting the above technical solution, a bracket structure with relatively high structural strength is formed, and it is more stable and reliable to be used as the boom of the crane.

[0013] Optionally, reinforcing columns are provided on both sides of one of the X-shaped frames, and the two ends of the reinforcing columns are respectively fixedly connected to two corresponding support rods.

[0014] By adopting the above technical solution, the reinforcing columns further strengthen the connection strength between the two support rods and enhance the stability of the bracket.

[0015] Optionally, the outer surfaces of the two connecting columns are sleeved and connected to the moving block.

[0016] By adopting the above technical solution, the connecting columns limit the movement of the moving block and improve the movement effect of the moving block 55.

[0017] Optionally, one end of the lead screw is rotatably connected to the limiting plate, and the outer surface of the limiting plate is slidably connected to the inner bracket.

[0018] By adopting the above technical solution, the limiting plate provides rotational support for the lead screw and improves the stability of the movement of the inner bracket.

[0019] Optionally, a protective plate is fixedly provided on the lower side of the outer end of the support plate, and the protective plate is connected to the lower end of the motor by means of bolts.

[0020] By adopting the above technical solution, the protective plate improves the stability of the placement of the motor, thereby improving the effect of the bracket adjustment.

[0021] Optionally, through grooves for using steel cables are formed on the lower sides of one ends of the limiting plate and the moving block.

[0022] By adopting the above technical solution, the steel cable is located in the through groove, so that the lifting adjustment of the hoisting structure will not be affected when adjusting the overall length of the bracket.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Through the socket design of the inner and outer brackets, the present application can conveniently adjust the length of the boom. The adjustment structure is simple in design and reliable in use, thereby improving the working effect of hoisting.

[0025] 2. Through the X-shaped frame and the strengthening column, the present application makes the boom structure have higher strength, is more stable and reliable when used as the boom of a crane, and through the design of two hoisting structures, the hoisting stability is improved, and the versatility of the crane is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present application.

[0027] Figure 2 is an internal structure and an exploded sectional view of the inner and outer brackets of the present application.

[0028] Figure 3 is a schematic diagram of a partial structure of the outer bracket of the present application.

[0029] Figure 4 is an exploded view of the support shaft structure and one of the rotating shaft structures.

[0030] In the figure, 1. Outer bracket; 11. Support rod; 12. X-shaped frame; 13. Strengthening column; 2. Inner bracket; 3. Vertical plate; 31. Connecting block; 4. Support column; 41. Side shaft; 42. Rotating shaft; 43. Support shaft; 44. Hook; 45. Steel cable; 5. Support plate; 51. Connecting column; 52. Limiting plate; 53. Motor; 54. Lead screw; 55. Moving block; 56. Protective plate; 57. Through groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following is combined with the attachedFigure 1 - Attachment Figure 4 , the present application will be further described in detail below.

[0032] Embodiment 1

[0033] The boom of the straight-arm double winch truck-mounted crane, referring to Figure 1-2 , includes an outer bracket 1. One end of the outer bracket 1 is movably inserted with an inner bracket 2. On the outer side near the inside of the outer bracket 1, there is a support plate 5 welded. One end of the support plate 5 is provided with a motor 53. On the lower side of the outer end of the support plate 5, there is a guard plate 56 welded, and the guard plate 56 is connected to the lower end of the motor 53 by bolts. The guard plate 56 improves the stability of the placement of the motor 53, thereby improving the effect of boom adjustment. The output end of the motor 53 penetrates through the support plate 5 and is welded with a lead screw 54. The outer surface of the lead screw 54 is threadedly sleeved with a moving block 55. The outer surface of the moving block 55 is welded to the inner surface of the inner bracket 2. One end of the support plate 5 is welded with two connecting columns 51. The outer surfaces of the two connecting columns 51 are both sleeved with the moving block 55. The same-side ends of the two connecting columns 51 are jointly welded with a limiting plate 52. One end of the lead screw 54 is rotatably connected to the limiting plate 52, and the outer surface of the limiting plate 52 is slidably connected to the inner bracket 2. The outer bracket 1 and the inner bracket 2 together form a boom structure, and its overall length can be adjusted. Specifically, start the motor 53 on the support plate 5. The rotation of the output end of the motor 53 causes the lead screw 54 to rotate, thereby driving the moving block 55 to move. The movement of the moving block 55 drives the inner bracket 2 to move. The inner bracket 2 can slide within the outer bracket 1, so that the overall length of the boom structure can be adjusted. The limiting plate 52 limits the adjustable range, and the connecting column 51 limits the movement of the moving block 55, improving the movement effect of the moving block 55. The adjustment structure is simple in design and reliable in use, and can conveniently adjust the length of the boom, thereby improving the working effect of hoisting.

[0034] Referring to Figure 2-3 , the outer bracket 1 and the inner bracket 2 have the same shape, and the size ratio of the outer bracket 1 to the inner bracket 2 is three to two. The outer bracket 1 includes four support rods 11. The four support rods 11 are distributed in a rectangle. A plurality of X-shaped frames 12 are welded between two adjacent support rods 11. On both sides of one of the X-shaped frames 12, there are strengthening columns 13, and the two ends of the strengthening columns 13 are respectively welded to the two corresponding support rods 11. The bracket structure is composed of four support rods 11 and is connected by the X-shaped frames 12 and the strengthening columns 13. In this way, a bracket structure with relatively high structural strength is formed, and it is more stable and reliable when used as the boom of a crane.

[0035] The implementation principle of the embodiment of this application is as follows: The outer bracket 1 and the inner bracket 2 together form a boom structure, and its overall length can be adjusted. Specifically, the motor 53 on the support plate 5 is started, and the output end of the motor 53 rotates to make the lead screw 54 rotate, thereby driving the moving block 55 to move. The movement of the moving block 55 drives the inner bracket 2 to move. The inner bracket 2 can slide within the outer bracket 1, so that the overall length of the boom structure can be adjusted. The limiting plate 52 limits the adjustable range, and the connecting column 51 limits the movement of the moving block 55 to improve the movement effect of the moving block 55. The adjustment structure is simple in design and reliable in use, and can conveniently adjust the length of the boom, thereby improving the working effect of hoisting.

[0036] The bracket structure is composed of four support rods 11, which are connected by an X-shaped frame 12 and a reinforcing column 13, thus forming a bracket structure with relatively high structural strength and being more stable and reliable when used as the boom of a crane.

[0037] Embodiment 2

[0038] The difference between this embodiment and Embodiment 1 is as follows:

[0039] Referring to Figure 4 , a vertical plate 3 is welded at one end of the inner bracket 2, and a connecting block 31 is welded at the outer end of the vertical plate 3. A support column 4 is welded at the lower end of the connecting block 31. Side shafts 41 are welded at both ends of the support column 4, and a rotatable rotating shaft 42 is provided between the side shaft 41 and the support column 4. A support shaft 43 that can be lifted is provided at the lower end of the rotating shaft 42. A hook 44 is welded at the lower end of the support shaft 43. One end of the rotating shaft 42 is provided with a steel cable 45 that can be stretched. The output end of the inner bracket 2 is connected to the support column 4 through the vertical plate 3 and the connecting block 31. The support column 4 is provided with a rotatable rotating shaft 42 through the side shafts 41 on both sides. The two rotating shafts 42 and the corresponding support shafts 43 below form two hoisting mechanisms. Items can be hoisted through the hook 44, and the height of the support shaft 43 is adjusted by stretching the steel cable 45. The design of the two hoisting structures improves the stability of hoisting and greatly improves the versatility of the crane.

[0040] Referring to Figure 2-4 , through grooves 57 for using the steel cable 45 are opened on the lower sides of one ends of the limiting plate 52 and the moving block 55. The steel cable 45 is located in the through grooves 57, so that the lifting adjustment of the hoisting structure will not be affected when adjusting the overall length of the bracket.

[0041] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are represented by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A boom of a straight-arm double-winch truck crane, comprising an outer bracket (1), characterized in that: An inner bracket (2) is movably inserted at one end of the outer bracket (1), a support plate (5) is fixedly provided on the inner surface of the outer bracket (1), a motor (53) is provided at one end of the support plate (5), an output end of the motor (53) passes through the support plate (5) and is fixedly provided with a screw rod (54), a moving block (55) is threadedly sleeved on the outer surface of the screw rod (54), the outer surface of the moving block (55) is fixedly connected to the inner surface of the inner bracket (2), two connecting columns (51) are fixedly provided at one end of the support plate (5), and a limiting plate (52) is fixedly provided at the same end of the two connecting columns (51).

2. The boom of the straight-arm double-winch truck crane according to claim 1, characterized in that: A vertical plate (3) is fixedly provided at one end of the inner bracket (2), and a connecting block (31) is fixedly provided at the outer end of the vertical plate (3), a supporting column (4) is fixedly provided at the lower end of the connecting block (31), side shafts (41) are fixedly provided at both ends of the supporting column (4), and a rotating shaft (42) is rotatably provided between the side shaft (41) and the supporting column (4), a supporting shaft (43) is provided at the lower end of the rotating shaft (42), a hook (44) is fixedly provided at the lower end of the supporting shaft (43), and a steel cable (45) is provided at one end of the rotating shaft (42).

3. The boom of the straight-arm double-winch truck crane according to claim 1, characterized in that: The outer support (1) and the inner support (2) have the same shape, and the size ratio of the outer support (1) to the inner support (2) is three to two. The outer support (1) comprises four support rods (11), the four support rods (11) are distributed in a rectangular shape, and a plurality of X-shaped frames (12) are fixedly arranged between two adjacent support rods (11).

4. The boom of the straight-arm double-winch truck crane according to claim 3 is characterized in that: Reinforcement columns (13) are provided on both sides of one of the X-shaped frames (12), and the two ends of the reinforcement column (13) are respectively fixedly connected to two corresponding support rods (11).

5. The boom of the straight-arm double-winch truck crane according to claim 1, characterized in that: The outer surfaces of the two connecting posts (51) are sleeve-connected to the moving block (55).

6. The boom of the straight-arm double-winch truck crane according to claim 1, characterized in that: One end of the screw rod (54) is rotatably connected to the limiting plate (52), and the outer surface of the limiting plate (52) is slidably connected to the inner bracket (2).

7. The boom of the straight-arm double-winch truck crane according to claim 1, characterized in that: A guard plate (56) is fixedly provided on the lower side of the outer end of the support plate (5), and the guard plate (56) is connected to the lower end of the motor (53) by bolts.

8. The boom of the straight-arm double-winch truck crane according to claim 2, characterized in that: The lower sides of one end of the limiting plate (52) and the moving block (55) are both provided with a through slot (57) for use with the steel cable (45).

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