Multifunctional hand-pulling auxiliary arm
By designing an adjustable luffing structure and guide pulley assembly for a multi-functional hand-operated auxiliary boom, the problems of simple structure and insufficient adaptability to working conditions in existing technologies have been solved, enabling efficient operation and improved work efficiency under different working conditions.
Patent Information
- Application Number
- CN202521131809.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-06-04
AI Technical Summary
The existing straight-section jib cannot meet the needs of various working conditions when operating in confined spaces. Its simple structure cannot accommodate both the hook and the pulley block, which affects the efficiency of operation.
A multifunctional hand-operated auxiliary boom was designed, which includes an adjustable luffing structure and a guide pulley assembly. It can switch between hook and moving pulley block operation. The design of the luffing shaft and mounting holes enables amplitude adjustment and rapid luffing, enhancing operational adaptability.
It achieves efficient operation under different working conditions, has a simple structure, is safe and reliable, has an adjustable range, and can switch between hook and pulley block, thus improving work efficiency.
Smart Images
Figure CN223920945U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, specifically to a multifunctional hand-operated auxiliary boom. Background Technology
[0002] Commonly used telescopic booms are typically straight booms with only one hook hole at the boom head. In actual operation, telescopic booms are used in various conditions such as pushing upwards and lowering the boom. When working in confined spaces, the straight boom structure cannot meet the requirements of these conditions, and the boom structure cannot accommodate the installation of pulley blocks, resulting in a relatively limited operating function and affecting work efficiency. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a multi-functional hand-operated auxiliary boom with simple structure, safety and reliability, adjustable range, strong adaptability to working conditions, and the ability to switch between hook and pulley block. It has rich working functions, which helps to improve working efficiency and can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional hand-operated auxiliary arm, including a fixed arm, a fixed ear plate fixedly connected to the left end of the fixed arm, the upper and lower sides of the fixed ear plate being arc-shaped, three variable amplitude mounting holes II being opened at equal angles on the upper left end of the fixed ear plate, three variable amplitude mounting holes I being opened at equal angles on the lower left end of the fixed ear plate, and a guide pulley assembly being installed at the bottom of the left end of the fixed arm;
[0005] A mounting ear plate is installed on the right end of the luffing arm. An upper mounting hole is opened on the top of the mounting ear plate. A second luffing shaft is inserted into the second luffing mounting hole on the far right of the fixed ear plate. The second luffing shaft passes through the upper mounting hole. A lower mounting hole is opened at the bottom of the mounting ear plate. A first luffing shaft is inserted into the first luffing mounting hole on the far right of the fixed ear plate. The first luffing shaft passes through the lower mounting hole. A working mechanism is installed on the left end of the luffing arm.
[0006] The fixed boom head is equipped with a luffing structure, which consists of a fixed lug, a luffing mounting hole one, and a luffing mounting hole two. An adjustable luffing boom is connected to it via luffing shaft one and luffing shaft two. To luff downwards, simply pull out luffing shaft two, rotate the luffing boom downwards until it aligns with the next luffing mounting hole two on the fixed lug, and then insert luffing shaft two to complete the luffing. To luff upwards, simply pull out luffing shaft one, rotate the luffing boom upwards until it aligns with the next luffing mounting hole one on the fixed lug, and then reinsert luffing shaft one to complete the luffing.
[0007] Furthermore, the guide pulley assembly includes a pulley seat and a guide pulley assembly. The pulley seat is installed at the bottom left end of the fixed arm, and the guide pulley assembly is rotatably installed at the bottom of the pulley seat. The guide pulley assembly includes a guide pulley.
[0008] Furthermore, it also includes a pin hole, which is provided in the middle of the side of the fixed arm.
[0009] Furthermore, the working mechanism includes a hook shaft and a nut. A groove is formed at the left end of the luffing boom, and an end hole is formed at the corresponding position of the groove at the left end of the luffing boom. The hook shaft is inserted into the end hole, and a nut is threadedly connected to the end of the hook shaft. Corresponding pin holes are formed on the end of the hook shaft and the nut, and cotter pins are installed in the corresponding pin holes on the hook shaft and the nut to prevent the nut from loosening and detaching from the end of the hook shaft, and also to prevent the hook shaft from detaching from the end hole.
[0010] Furthermore, the working mechanism also includes a support pulley assembly and a sleeve. The portion of the hook shaft located in the groove is fitted with a sleeve, and two support pulley assemblies are rotatably connected to both ends of the sleeve. The support pulley assembly includes a support pulley.
[0011] Furthermore, the working mechanism also includes spacers. Two spacers are respectively fitted onto the positions of the hook shaft at the two ends of the sleeve. The spacers protect the ends of the sleeve and the support pulley assembly, preventing the sleeve and the support pulley assembly from rubbing against the inner wall of the groove and causing excessive wear.
[0012] When the movable pulley block is required to operate, the winch wire rope passes through the guide pulley in the guide pulley assembly to the support pulley in the support pulley assembly, and then connects to the movable pulley block.
[0013] Furthermore, the working mechanism also includes a hook mounting bracket and a hook, with the portion of the hook shaft located in the groove passing through two insertion holes on the hook mounting bracket, and the bottom of the hook mounting bracket being fixedly connected to the top of the hook.
[0014] When hook operation is required, remove the cotter pin and nut, pull out the hook shaft, and remove the sleeve, spacer and support pulley assembly before installing the hook for operation. This structure can effectively improve the operation function and efficiency of the jib.
[0015] Compared with existing technologies, the advantages of this multi-functional hand-operated auxiliary arm are:
[0016] 1. To luff downwards, simply pull out luffing shaft two, rotate the luffing arm downwards until it aligns with the next luffing mounting hole two on the fixed ear plate, and then insert luffing shaft two to complete the luffing change. To luff upwards, simply pull out luffing shaft one, rotate the luffing arm upwards until it aligns with the next luffing mounting hole one on the fixed ear plate, and then reinsert luffing shaft one to complete the luffing change. This method allows for luffing changes, is highly adaptable to various working conditions, and is convenient and quick.
[0017] 2. It has a simple structure, is safe and reliable, has an adjustable range, is highly adaptable to working conditions, and can switch between hook and pulley block operations. It has a variety of functions and helps to improve work efficiency. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This utility model Figure 1 Side view diagram;
[0020] Figure 3 This is a schematic diagram of a partial structure of the present invention. Figure 1 ;
[0021] Figure 4 This is a schematic diagram of a partial structure of the present invention. Figure 2 ;
[0022] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;
[0023] In the diagram: 1 Fixed arm, 2 Pin hole, 3 Fixed lug plate, 4 Luffing mounting hole one, 5 Luffing shaft one, 6 Luffing mounting hole two, 7 Luffing shaft two, 8 Luffing arm, 9 Pulley seat, 10 Guide pulley assembly, 11 Hook shaft, 12 Support pulley assembly, 13 Sleeve, 14 Nut, 15 Spacer, 16 Mounting lug plate, 17 Upper mounting hole, 18 Lower mounting hole, 19 Hook mounting bracket, 20 Hook. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Example 1, please refer to Figures 1 to 4 This utility model provides a technical solution: a multi-functional hand-operated auxiliary arm, including a fixed arm 1, a fixed ear plate 3 fixedly connected to the left end of the fixed arm 1, the upper and lower sides of the fixed ear plate 3 are both arc-shaped, three variable amplitude mounting holes 6 are opened at equal angles on the upper left end of the fixed ear plate 3, three variable amplitude mounting holes 4 are opened at equal angles on the lower left end of the fixed ear plate 3, and a guide pulley assembly is installed at the bottom of the left end of the fixed arm 1.
[0026] A mounting ear plate 16 is installed on the right end of the luffing arm 8. An upper mounting hole 17 is opened on the top of the mounting ear plate 16. A luffing shaft 7 is inserted through the luffing mounting hole 6 on the far right of the fixed ear plate 3. The luffing shaft 7 passes through the upper mounting hole 17. A lower mounting hole 18 is opened at the bottom of the mounting ear plate 16. A luffing shaft 5 is inserted through the luffing mounting hole 4 on the far right of the fixed ear plate 3. The luffing shaft 5 passes through the lower mounting hole 18. A working mechanism is installed on the left end of the luffing arm 8.
[0027] The fixed arm 1 has an mountable luffing structure at its head, which consists of a fixed lug 3, a luffing mounting hole 4, and a luffing mounting hole 6. An adjustable luffing arm 8 is connected to it via a luffing shaft 5 and a luffing shaft 7. To luff downwards, simply pull out the luffing shaft 7, rotate the luffing arm 8 downwards until it aligns with the next luffing mounting hole 6 on the fixed lug 3, and then insert the luffing shaft 7 to complete the luffing. To luff upwards, simply pull out the luffing shaft 5, rotate the luffing arm 8 upwards until it aligns with the next luffing mounting hole 4 on the fixed lug 3, and then reinsert the luffing shaft 5 to complete the luffing.
[0028] The guide pulley assembly includes a pulley seat 9 and a guide pulley assembly 10. The pulley seat 9 is installed at the bottom left end of the fixed arm 1, and the guide pulley assembly 10 is rotatably installed at the bottom of the pulley seat 9. The guide pulley assembly 10 includes a guide pulley.
[0029] It also includes a pin hole 2. The pin hole 2 is provided in the middle of the side of the fixed arm 1, so that the fixed arm 1 can be easily installed in the required position with the help of the pin hole 2.
[0030] The working mechanism includes a hook shaft 11 and a nut 14. A groove is provided at the left end of the luffing boom 8, and an end hole is provided at the corresponding position of the groove at the left end of the luffing boom 8. The hook shaft 11 is inserted into the end hole, and the end of the hook shaft 11 is threadedly connected to the nut 14. Corresponding pin holes are provided on the end of the hook shaft 11 and the nut 14. Cotter pins are installed in the corresponding pin holes on the hook shaft 11 and the nut 14 to prevent the nut 14 from loosening and detaching from the end of the hook shaft 11, and also to prevent the hook shaft 11 from detaching from the end hole.
[0031] The working mechanism also includes a support pulley assembly 12 and a sleeve 13. The part of the hook shaft 11 located in the groove is fitted with the sleeve 13. The two ends of the sleeve 13 are respectively rotatably connected to two support pulley assemblies 12, and the support pulley assembly 12 includes support pulleys.
[0032] The working mechanism also includes spacers 15. Two spacers 15 are respectively fitted onto the positions of the hook shaft 11 at both ends of the sleeve 13. The spacers 15 protect the ends of the sleeve 13 and the support pulley assembly 12, preventing the sleeve 13 and the support pulley assembly 12 from rubbing against the inner wall of the groove and causing excessive wear.
[0033] When the movable pulley block is required to operate, the hoisting wire rope passes through the guide pulley in the guide pulley assembly 10 and winds around to the support pulley in the support pulley assembly 12, and then connects to the movable pulley block.
[0034] Example 2, please refer to Figure 5 This utility model provides a technical solution: a multi-functional hand-operated auxiliary arm. This embodiment has a similar structure to Embodiment 1, the difference being the different working mechanism.
[0035] The working mechanism also includes a hook mounting bracket 19 and a hook 20. The portion of the hook shaft 11 located in the groove passes through two insertion holes on the hook mounting bracket 19. The bottom of the hook mounting bracket 19 is fixedly connected to the top of the hook 20.
[0036] When hook operation is required, remove the cotter pin and nut 14, pull out the hook shaft 11, and remove the sleeve 13, spacer 15 and support pulley assembly 12. Then, the hook mounting bracket 19 and hook 20 can be installed with the help of the hook shaft 11 and nut 14 for operation. This structure can effectively improve the operation function and efficiency of the auxiliary boom.
[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-functional hand-operated auxiliary arm, characterized in that, Includes a fixed arm (1), and a fixed ear plate (3) is fixedly connected to the left end of the fixed arm (1). The upper and lower sides of the fixed ear plate (3) are both arc-shaped. Three variable amplitude mounting holes (6) are opened at equal angles on the upper left side of the fixed ear plate (3). Three variable amplitude mounting holes (4) are opened at equal angles on the lower left side of the fixed ear plate (3). A guide pulley assembly is installed at the bottom of the left end of the fixed arm (1). A mounting ear plate (16) is installed on the right end of the luffing arm (8). An upper mounting hole (17) is opened on the top of the mounting ear plate (16). A luffing shaft (7) is inserted into the luffing mounting hole (6) on the far right of the fixed ear plate (3). The luffing shaft (7) passes through the upper mounting hole (17). A lower mounting hole (18) is opened at the bottom end of the mounting ear plate (16). A luffing shaft (5) is inserted into the luffing mounting hole (4) on the far right of the fixed ear plate (3). The luffing shaft (5) passes through the lower mounting hole (18). A working mechanism is installed on the left end of the luffing arm (8).
2. The multifunctional hand-operated auxiliary arm according to claim 1, characterized in that: The guide pulley assembly includes a pulley seat (9) and a guide pulley assembly (10). The pulley seat (9) is installed at the bottom left end of the fixed arm (1), and the guide pulley assembly (10) is rotatably installed at the bottom of the pulley seat (9).
3. The multifunctional hand-operated auxiliary arm according to claim 1, characterized in that: It also includes a pin hole (2), and the fixed arm (1) has a pin hole (2) in the middle of its side.
4. A multifunctional hand-operated auxiliary arm according to claim 1, characterized in that: The working mechanism includes a hook shaft (11) and a nut (14). The left end of the luffing arm (8) is provided with a groove, and the left end of the luffing arm (8) is provided with an end hole corresponding to the groove. The hook shaft (11) is inserted into the end hole, and the end of the hook shaft (11) is threaded with a nut (14).
5. A multifunctional hand-operated auxiliary arm according to claim 4, characterized in that: The working mechanism also includes a support pulley assembly (12) and a sleeve (13). The part of the hook shaft (11) located in the groove is fitted with the sleeve (13). The two ends of the sleeve (13) are respectively rotatably connected to two support pulley assemblies (12).
6. A multifunctional hand-operated auxiliary arm according to claim 5, characterized in that: The working mechanism also includes spacers (15), and two spacers (15) are respectively fitted at the positions of the hook shaft (11) at the two ends of the sleeve (13).
7. A multifunctional hand-operated auxiliary arm according to claim 4, characterized in that: The working mechanism also includes a hook mounting bracket (19) and a hook (20), the portion of the hook shaft (11) located in the groove passes through two insertion holes on the hook mounting bracket (19), and the bottom of the hook mounting bracket (19) is fixedly connected to the top of the hook (20).