A portable slewing crane with variable boom

Abstract

The utility model discloses a portable crane of variable amplitude can rotate, specifically relates to crane technical field, including chassis, the first base that chassis top fixedly connected has, the first base is fixedly connected with the second base through bolt, and the first base outside is installed with the rotating assembly, the rotating assembly includes transmission bearing seat, and transmission bearing seat is fixedly connected with the first base inside, and the second base top is fixedly connected with the rotating support through bolt, and the rotating support bottom is fixedly connected with the connecting support pole, and the connecting support pole is inserted with transmission bearing seat inside, and the rotating support inside fixedly connected with the connecting support base, the utility model discloses through setting rotating assembly and support mechanism, need only through manual operation to realize rotation, improved the flexibility of operation, and can separately carry out dismounting, and the manual handling is convenient, thereby realizes quick dismounting and changes scene, and the stability of crane has been improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and more specifically, to a lightweight crane that can rotate and has variable amplitude. Background Technology

[0002] Portable cranes are compact, flexible, and easy-to-move-and-install lifting equipment widely used in construction, decoration, logistics, warehousing, and home repair. They typically feature a lightweight design, are small in size and light in weight, making them easy to carry and move. This makes them particularly suitable for use in situations with limited space or where frequent changes of work location are required.

[0003] Currently, most lightweight cranes sold on the market are civilian products, and they generally suffer from drawbacks such as small lifting capacity, small working radius, simple structure, low load-bearing ratio, and low structural safety factor. For some high-altitude operation projects where the safety factor of the lifting equipment is more critical, and where crane installation must be completed entirely by manual handling, new requirements are placed on the design of lightweight cranes.

[0004] A search revealed that Chinese patent CN202054567U discloses a portable manual crane that can be easily disassembled and assembled. It employs a structure ingeniously designed and conveniently practical structure in which the direction of rotation of the lifting wheel is adjusted by a directional switch, allowing the lifting rope with hook to be raised or lowered by manually cranking the handle. The main frame can drive the boom to rotate 360 ​​degrees, making it very convenient for lifting objects.

[0005] The aforementioned portable manual cranes have limitations in practical use. Their working radius is small, lifting capacity is limited, and they must be used on a flat surface. The rotating frame occupies a large area and needs to be extended directly under the load to maintain balance. Changing the working direction requires moving the entire crane frame, which is cumbersome, requires ample space, and is often a single unit, making disassembly difficult. Furthermore, these portable cranes cannot meet the requirements for high-altitude operations. Typically, high-altitude operations require the crane's boom to be fully extended above the work platform to lift heavy objects from the ground to a height of over 100 meters. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a lightweight crane with slewing and variable amplitude to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A slewing, variable-amplitude lightweight crane includes a chassis, a first base fixedly connected to the top of the chassis, a second base fixedly connected to the first base by bolts, and a slewing assembly installed on the outside of the first base.

[0009] The slewing assembly includes a transmission bearing housing, which is fixedly connected to the interior of a first base. A rotating bracket is fixedly connected to the top of the second base by bolts. A connecting rod is fixedly connected to the bottom of the rotating bracket, and the connecting rod is inserted into the inner side of the transmission bearing housing. A connecting support is fixedly connected to the inner side of the rotating bracket, and a rotating handle is fixedly connected inside the connecting support. A first hinge support is fixedly connected to one side of the rotating bracket, and a luffing cylinder is hinged inside the first hinge support. A rotating shaft is installed at one end of the rotating bracket, and a first boom is rotatably connected to the outer side of the rotating shaft. A second hinge support is fixedly connected to one side of the first boom, and the inner side of the second hinge support is hinged to one end of the luffing cylinder. A stay cable is provided on the outer side of the first boom, and a second boom is installed inside the stay cable. A chain hoist is provided at one end of the second boom.

[0010] By adopting the above technical solution, rotation can be achieved through manual operation, and disassembly can be performed independently.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. By setting up a slewing component, compared with the existing technology, the first boom can be slewing by using the rotation handle in conjunction with the transmission bearing seat. There is no need to move the entire crane. Slewing can be achieved by manual operation, which improves the flexibility of operation. Furthermore, since each part is fixed by bolts, it can be disassembled individually, which is convenient for manual handling. This enables rapid disassembly and relocation, improving the utilization rate of the equipment and the flexibility of operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 For the present utility model Figure 1 Sectional view at point AA.

[0015] Figure 3 For the present utility model Figure 1 A partial side view in the B direction.

[0016] Figure 4 This is a schematic diagram of the chain hoist structure of this utility model.

[0017] The attached figures are labeled as follows: 1. Chassis; 2. First base; 3. Transmission bearing seat; 4. Second base; 5. Rotating bracket; 6. Connecting support; 7. Rotating handle; 8. First hinge support; 9. Luffing cylinder; 10. Rotating support shaft; 11. First boom; 12. Second hinge support; 13. Stay cable; 14. Second boom; 15. Chain hoist; 20. Connecting support rod. Detailed Implementation

[0018] 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.

[0019] The embodiments disclosed in this application are as follows: Figure 1-4 The portable crane shown includes a chassis 1, a first base 2 fixedly connected to the top of the chassis 1, a second base 4 fixedly connected to the first base 2 by bolts, a slewing assembly installed on the outside of the first base 2, and a support mechanism installed on the outside of the chassis 1.

[0020] The slewing assembly includes a transmission bearing housing 3, which is fixedly connected to the inside of the first base 2. A rotating bracket 5 is fixedly connected to the top of the second base 4 by bolts. A connecting support rod 20 is fixedly connected to the bottom of the rotating bracket 5 and is inserted into the inside of the transmission bearing housing 3. A connecting support 6 is fixedly connected to the inside of the rotating bracket 5, and a rotating handle 7 is fixedly connected inside the connecting support 6. A first hinge support 8 is fixedly connected to one side of the rotating bracket 5, and a luffing cylinder 9 is hinged inside the first hinge support 8. A rotating shaft 10 is installed at one end of the rotating bracket 5, and a first boom 11 is rotatably connected to the outside of the rotating shaft 10. A second hinge is fixedly connected to one side of the first boom 11. Support 12, the inner side of the second hinge support 12 is hinged to one end of the luffing cylinder 9, the outer side of the first boom 11 is provided with a stay cable 13, the second boom 14 is installed inside the stay cable 13, and one end of the second boom 14 is provided with a chain hoist 15. The two ends of the luffing cylinder 9 are respectively hinged to the inner sides of the first hinge support 8 and the second hinge support 12. Through the extension and retraction of the luffing cylinder 9, different working angles can be completed. The rotation of the first boom 11 can be realized by the cooperation of the rotating handle 7 and the transmission bearing seat 3, which improves the flexibility of operation. Furthermore, the parts are fixedly connected by bolts, which allows for individual disassembly, so as to facilitate quick assembly and disassembly and relocation.

[0021] Working principle of this utility model: This utility model designs a lightweight crane that can rotate and has a variable amplitude. The specific structure is shown in the attached instruction manual. Figure 1-4As shown, in this technical solution, through the cooperation between various structures, when hoisting is required, the chassis 1 is first fixed to the ground with bolts. The inclined cable 13 transmits the force at the end of the second boom 14 to the root, which can increase the rigidity of the first boom 11 while controlling its own weight, so that the chain hoist 15 can hoist the object. The two ends of the luffing cylinder 9 are respectively hinged to the inner sides of the first hinge support 8 and the second hinge support 12. The extension and retraction of the luffing cylinder 9, in cooperation with the first boom 11, can complete the working amplitude of different angles. When rotation is required after hoisting, the rotating handle 7 is turned, and the connecting support rod 20 is inserted into the transmission bearing seat 3. The lever principle is used to cooperate with the transmission bearing seat 3 inside the chassis 1 to rotate the first boom 11. When it is required to be moved to another location, since all the connecting parts are fixed by bolts, the connecting parts can be disassembled, and each part can be disassembled, thereby realizing quick disassembly and relocation.

[0022] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0023] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures and will not be described here.

[0024] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slewing, variable-amplitude lightweight crane, comprising a chassis (1), characterized in that: The chassis (1) is fixedly connected to a first base (2) at the top, and the first base (2) is fixedly connected to a second base (4) by bolts. A rotary assembly is installed on the outside of the first base (2). The rotary assembly includes a transmission bearing seat (3), which is fixedly connected to the inside of the first base (2). The top of the second base (4) is fixedly connected to a rotating bracket (5) by bolts. The bottom of the rotating bracket (5) is fixedly connected to a connecting rod (20), which is inserted into the inside of the transmission bearing seat (3). The inside of the rotating bracket (5) is fixedly connected to a connecting support (6).

2. The rotatable and variable-amplitude lightweight crane according to claim 1, characterized in that: The connecting support (6) has a rotating handle (7) fixedly connected inside, and the rotating bracket (5) has a first hinge support (8) fixedly connected to one side, and the first hinge support (8) has a variable amplitude cylinder (9) hinged inside.

3. The rotatable and variable-amplitude lightweight crane according to claim 1, characterized in that: One end of the rotating support (5) is equipped with a rotating support shaft (10), and the outer side of the rotating support shaft (10) is rotatably connected to a first boom (11). A second hinge support (12) is fixedly connected to one side of the first boom (11), and the inner side of the second hinge support (12) is hinged to one end of the luffing cylinder (9).

4. The slewing, variable-amplitude lightweight crane according to claim 3, characterized in that: The first boom (11) is provided with a stay cable (13) on the outside, and a second boom (14) is installed inside the stay cable (13). A chain hoist (15) is provided at one end of the second boom (14).

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