Crane and crane boom with rotatable boom head thereof
By designing a rotatable boom assembly and a boom with variable angle hydraulic cylinders or electric telescopic cylinders, the problem of inconvenience in narrow spaces caused by the non-adjustable boom in existing technologies has been solved, enabling flexible lifting of cranes in low and narrow spaces.
Patent Information
- Application Number
- CN202422199205.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The existing crane boom head is welded to the main body of the boom, and the angle and pulley position cannot be adjusted, which makes it inconvenient to operate in narrow spaces, especially when hoisting in low and narrow sites, it occupies a lot of space.
Design a rotatable boom, which connects the boom body and the boom head assembly via a variable angle hydraulic cylinder or an electric telescopic cylinder to achieve continuous adjustment of the boom head angle. Combined with the layout of guide pulleys and lifting pulleys, it improves the flexibility of lifting operations.
It enables continuous changes in the angle of the crane boom, improves the ease of lifting in confined spaces, allows it to overcome obstacles, and enhances its operational capabilities in low and narrow areas.
Smart Images
Figure CN223458026U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of crane and its arm head rotatable type lifting arm, belong to wheeled crane technical field. BACKGROUND
[0002] Lifting arm arm head installs pulley connection lifting hook for carrying out hoisting operation, generally at least two groups of pulleys, upper pulley is called guide pulley, for changing the direction of hoisting wire rope, make it around the hoisting pulley position in the lower direction.Lower pulley is called hoisting pulley, hoisting pulley has multiple, and the pulley on lifting hook forms pulley block, can improve hoisting ratio, in the case where single rope force is invariable, make lifting hook obtain larger hoisting force.The arm head and lifting arm main body are welded together in the structure of existing crane arm head, arm head angle and pulley position are not adjustable.In order to prevent when lifting arm elevation angle is larger, wire rope and lifting arm interfere, hoisting pulley position is generally lower, leading to arm head height is larger, occupies larger space, is not conducive to crane operation in low narrow site. SUMMARY
[0003] The technical problem to be solved by the utility model is to overcome the defects of prior art, provide a kind of lifting arm and its arm head rotatable type lifting arm, arm head angle can be adjusted according to requirement, can improve the convenience of crane operation in narrow space.
[0004] To solve the above technical problems, the technical scheme adopted by the utility model is:
[0005] A kind of arm head rotatable type lifting arm, including lifting arm main body, the lifting arm main body is rotatably connected with arm head assembly, the lifting arm main body is rotatably connected with the one end of angle-variable oil cylinder, the other end of the angle-variable oil cylinder is rotatably connected with the arm head assembly, guide pulley and hoisting pulley are provided on the arm head assembly, the guide pulley is located above the hoisting pulley.
[0006] The lifting arm main body is rotatably connected with the arm head assembly by pin shaft.
[0007] The guide pulley is installed on the pin shaft.
[0008] The angle-variable oil cylinder is replaced by electric telescopic cylinder.
[0009] First fixed shaft is provided on the lifting arm main body, second fixed shaft is provided on the arm head assembly, the two ends of the angle-variable oil cylinder are rotatably connected with the first fixed shaft and second fixed shaft respectively.
[0010] Auxiliary arm is installed on the arm head assembly.
[0011] The relative rotation angle between the lifting arm main body and the arm head assembly is greater than 90 degrees.
[0012] A crane comprises the rotatable boom head.
[0013] The utility model discloses a kind of crane, comprising the rotatable boom head of the arm head. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is structure schematic drawing of the utility model in vertical state;
[0015] Figure 2 It is structure schematic drawing of the utility model in vertical state;
[0016] Figure 3 It is structure schematic drawing of the utility model in vertical state; Figure 2 It is structure schematic drawing of the utility model in vertical state;
[0017] Figure 4 It is structure schematic drawing of the utility model in vertical state;
[0018] Figure 5 It is structure schematic drawing of the utility model in vertical state;
[0019] Figure 6 It is structure schematic drawing of the utility model in vertical state;
[0020] Reference signs in the drawing are as follows: 1-crane main body;2-angle-variable oil cylinder;3-arm head assembly;4-pin;5-lifting sheave;6-second fixed shaft;7-first fixed shaft;8-guide sheave. DETAILED DESCRIPTION
[0021] Example 1
[0022] As shown in Figure 1 , Figure 4 and Figure 5 , the utility model discloses a kind of rotatable boom head crane, including crane main body 1, crane main body 1 rotatably connected with arm head assembly 3, crane main body 1 is rotatably connected with the one end of angle-variable oil cylinder 2, the other end of angle-variable oil cylinder 2 is rotatably connected with arm head assembly 3, guide sheave 8 and lifting sheave 5 are provided on arm head assembly 3, and guide sheave 8 is located above lifting sheave 5.
[0023] As shown in Figure 2 , Figure 3As shown, the arm head assembly in the utility model can rotate forward and backward, by changing the arm head angle, it is convenient to work in a small space, typical working conditions are as follows Figure 6 As shown, the traditional arm head cannot cross the beam for work due to size limitation, at this time, the arm head is rotated forward, the lifting hook is raised and the distance of the boom is increased, which is convenient to cross the beam for work Figure 6 b) or after the arm head is installed with a secondary arm, the arm head is rotated backward, the secondary arm is stretched over the beam for work by the included angle of the primary and secondary arms Figure 6 c).
[0024] When the arm head needs to be inclined forward for work, the variable angle oil cylinder is controlled to extend, the variable angle oil cylinder pushes the arm head assembly to rotate, and the arm head realizes forward inclination. When the arm head assembly needs to be inclined backward, the variable angle oil cylinder is retracted. The utility model controls the forward and backward rotation of the arm head through the extension and retraction of the oil cylinder, realizes the continuous change of the arm head angle when the crane lifts the load, and can improve the convenience of the crane working in a small space.
[0025] Example 2
[0026] As shown in Figure 1 , Figure 4 and Figure 5 The utility model discloses a rotatable type crane boom, which comprises a crane boom body 1, an arm head assembly 3 is rotationally connected to the crane boom body 1, the crane boom body 1 and the arm head assembly 3 are rotationally connected through a pin shaft 4, and the relative rotation angle between the crane boom body 1 and the arm head assembly 3 is greater than 90 degrees. One end of the crane boom body 1 is rotationally connected with a variable angle oil cylinder 2, and the other end of the variable angle oil cylinder 2 is rotationally connected with the arm head assembly 3. The utility model uses the variable angle oil cylinder to push the arm head to rotate, which is convenient and labor-saving. The variable angle oil cylinder can continuously stretch and retract with load, can realize the change of the arm head angle during the lifting process, and is convenient for users to use. A first fixed shaft 7 is arranged on the crane boom body 1, a second fixed shaft 6 is arranged on the arm head assembly 3, and the two ends of the variable angle oil cylinder 2 are rotationally connected with the first fixed shaft 7 and the second fixed shaft 6 respectively. A guide pulley 8 and a lifting pulley 5 are arranged on the arm head assembly 3, the guide pulley 8 is installed on the pin shaft 4, and the guide pulley 8 is located above the lifting pulley 5.
[0027] As shown in Figure 2 and Figure 3 The arm head assembly in the utility model can rotate forward and backward, A, B and 7 in the drawing respectively represent the backward inclination, vertical and forward inclination states, by changing the arm head angle, it is convenient to work in a small space, typical working conditions are as follows Figure 6 As shown, the traditional arm head cannot cross the beam for work due to size limitation, at this time, the arm head is rotated forward, the lifting hook is raised and the distance of the boom is increased, which is convenient to cross the beam for work Figure 6 b) or after the arm head is installed with a secondary arm, the arm head is rotated backward, the secondary arm is stretched over the beam for work by the included angle of the primary and secondary armsFigure 6 In c).
[0028] Example 3
[0029] This example is identical to example 2, with the exception that the variable angle cylinder 2 is replaced by an electric telescopic cylinder.
[0030] Example 4
[0031] This example discloses a crane comprising the head-rotatable jib of example 1, 2 or 3.
[0032] The preferred embodiments of the utility model have been described above, it should be pointed out: for ordinary skilled person in the art, on the premise of not departing from the principle of the utility model, can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.
Claims
1. A slewing boom, characterized by: The crane boom body (1) is rotatably connected with an arm head assembly (3), and rotatably connected with one end of a variable angle oil cylinder (2), and the other end of the variable angle oil cylinder (2) is rotatably connected with the arm head assembly (3), and the arm head assembly (3) is provided with a guide sheave (8) and a lifting sheave (5), and the guide sheave (8) is located above the lifting sheave (5).
2. A rotatable boom for a head assembly according to claim 1, wherein: The crane boom body (1) and the arm head assembly (3) are rotatably connected through a pin shaft (4).
3. A rotatable boom for a head assembly according to claim 2, wherein: The guide sheave (8) is installed on the pin shaft (4).
4. A rotatable boom for a head assembly according to claim 1, wherein: The variable angle oil cylinder (2) is replaced by an electric telescopic cylinder.
5. A rotatable boom for a head assembly as defined in claim 1, wherein: The crane boom body (1) is provided with a first fixed shaft (7), the arm head assembly (3) is provided with a second fixed shaft (6), and the two ends of the variable angle oil cylinder (2) are rotatably connected with the first fixed shaft (7) and the second fixed shaft (6) respectively.
6. A rotatable boom for a head assembly according to claim 1, wherein: The arm head assembly (3) is installed with a sub-arm.
7. A rotatable boom for a head assembly according to claim 1, wherein: The relative rotation angle between the crane boom body (1) and the arm head assembly (3) is greater than 90 degrees.
8. A crane, characterized by: The arm head rotatable crane boom comprises the arm head rotatable crane boom body and the arm head rotatable crane boom body.