A counterweight rearward movement mechanism for a crane
By designing a counterweight rearward movement mechanism for a crane, and adjusting the center of gravity position of the counterweight using the carriage and telescopic mechanism, the problem of not being able to obtain a larger balance torque by adjusting the center of gravity distance of the counterweight in the prior art is solved, and the effect of obtaining a larger balance torque without increasing costs is achieved.
Patent Information
- Application Number
- CN202211055434.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-31
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2042-08-31
AI Technical Summary
When existing cranes require a larger balance torque, they cannot be achieved by adjusting the center of gravity distance of the balance weight, resulting in the need to add more balance weight and increase procurement and operation costs.
A counterweight rear movement mechanism is designed, including a platform support, a carriage, a guide mechanism and a telescopic mechanism. The center of gravity position of the counterweight is adjusted through the movement of the carriage to achieve the adjustment of the balance torque.
By adjusting the center of gravity position of the counterweight, a greater balance torque can be obtained without increasing the counterweight, reducing costs and improving the performance of the crane.
Smart Images
Figure CN115448181B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of counterweight moving mechanisms and relates to a counterweight rearward moving mechanism for a crane. Background Art
[0002] The counterweight of a crane is a key component of the lifting equipment, generally installed on the slewing platform to balance the lifting moment and prevent the whole machine from tipping over during lifting operations. Currently, the counterweight and the slewing platform of the crane are generally connected together in the following three ways:
[0003] ① For small-tonnage cranes, they are generally fixed to the slewing platform by bolts;
[0004] ② For medium and large-tonnage cranes, they are generally installed on the slewing platform through counterweight lifting cylinders installed on the slewing platform;
[0005] ③ Through the jacking cylinder installed on the chassis, after jacking up the counterweight, the counterweight and the slewing platform are connected together with bolts.
[0006] The distance between the center of gravity of the counterweight and the center of the slewing platform in the above connection methods is a fixed value, which means that the moment arm is a fixed value after the counterweight is installed, and the generated balancing moment remains unchanged. When the crane needs to obtain a greater balancing moment, since the distance between the center of gravity of the counterweight and the center of rotation remains unchanged, it means that more counterweights are needed for balancing. In this way, not only the procurement cost of the counterweight is increased, but also the operating cost generated by transporting the counterweight is increased. In the current highly competitive environment of the crane industry, how to obtain a greater balancing moment with less cost is an urgent problem to be solved. Summary of the Invention
[0007] The purpose of the invention is to provide a counterweight rearward moving mechanism for a crane, which has the characteristic of adjusting the center of gravity of the counterweight.
[0008] The purpose of the invention can be realized by the following technical solutions:
[0009] A counterweight rearward moving mechanism for a crane includes a platform support, a carriage is slidably connected to the platform support, a guiding mechanism is arranged between the carriage and the platform support, and a telescopic mechanism is arranged on one side of the carriage.
[0010] As a preferred technical solution of the invention, the carriage includes a lower cover plate, the lower cover plate is located below the platform support, upper cover plates are respectively fixed to the left and right sides of the upper end surface of the lower cover plate through connecting components, the platform support is located between the two connecting components, and the left and right ends of the platform support are respectively located below the two upper cover plates, and the platform support is movably connected to the connecting components and the upper cover plates.
[0011] As a preferred technical solution of the present invention, notches are symmetrically arranged in the middle of the left and right ends of the lower cover plate. The connecting assembly includes two cushion blocks, and the two cushion blocks are respectively arranged on both sides of the corresponding notch. The left and right ends of the lower cover plate are fixedly connected to the upper cover plate through the corresponding cushion blocks.
[0012] As a preferred technical solution of the present invention, the upper cover plate is also provided with notches at positions corresponding to the notches of the lower cover plate.
[0013] As a preferred technical solution of the present invention, the guiding mechanism includes guiding blocks symmetrically arranged on the upper and lower end faces of the platform support. Guiding grooves slidably adapted to the guiding blocks are arranged on both the upper cover plate and the lower cover plate.
[0014] As a preferred technical solution of the present invention, the telescopic mechanism includes a counterweight rearward movement oil cylinder. Both ends of the counterweight rearward movement oil cylinder are provided with oil cylinder supports, and one of the oil cylinder supports is connected to the side end face of the lower cover plate.
[0015] Advantages of the present invention:
[0016] (1) The counterweight rearward movement mechanism of the present invention is installed on the slewing platform of the crane. The counterweight is installed below the carriage. The telescopic movement of the telescopic mechanism drives the carriage to move back and forth, and the counterweight also moves with the carriage, realizing the adjustment of the position of the center of gravity of the counterweight. Description of the drawings
[0017] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the drawings.
[0018] Figure 1 is the usage state diagram of the present invention;
[0019] Figure 2 is another usage state diagram of the present invention;
[0020] Figure 3 is the exploded view of the platform support and the carriage;
[0021] In the figure: 1. Platform support; 2. Carriage; 21. Lower cover plate; 22. Upper cover plate; 3. Guiding mechanism; 31. Guiding block; 32. Guiding groove; 4. Telescopic mechanism; 41. Counterweight rearward movement oil cylinder; 42. Oil cylinder support; 5. Connecting assembly; 51. Cushion block; 6. Counterweight; 7. Slewing platform; 8. Boom. Detailed implementation manners
[0022] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, with reference to the drawings and preferred embodiments, describe in detail the specific implementation manners, structures, features and their effects of the present invention as follows.
[0023] Please refer to Figures 1-3 As shown, a counterweight rearward movement mechanism for a crane includes a platform support 1. A carriage 2 is slidably connected to the platform support 1. A guiding mechanism 3 is provided between the carriage 2 and the platform support 1. A telescopic mechanism 4 is provided on one side of the carriage 2.
[0024] The carriage 2 includes a lower cover plate 21 which is located below the platform support 1. Upper cover plates 22 are respectively fixed to the left and right sides of the upper end surface of the lower cover plate 21 through connecting components 5. The platform support 1 is located between the two connecting components 5, and the left and right ends of the platform support 1 are respectively located below the two upper cover plates 22. The platform support 1 is movably connected to the connecting components 5 and the upper cover plates 22.
[0025] Notches are symmetrically provided in the middle of the left and right ends of the lower cover plate 21. The connecting component 5 includes two cushion blocks 51 which are respectively arranged on both sides of the corresponding notches. The left and right ends of the lower cover plate 21 are respectively fixedly connected to the upper cover plates 22 through the corresponding cushion blocks 51.
[0026] The upper cover plate 22 is also provided with notches at positions corresponding to the notches of the lower cover plate 21.
[0027] The guiding mechanism 3 includes guiding blocks 31 symmetrically arranged on the upper and lower end faces of the platform support 1. Guiding grooves 32 which are slidably adapted to the guiding blocks 31 are provided on both the upper cover plate 22 and the lower cover plate 21. The setting of the guiding mechanism 3 can ensure the stable sliding of the carriage 2.
[0028] The telescopic mechanism 4 includes a counterweight rearward movement oil cylinder 41. Oil cylinder supports 42 are provided at both ends of the counterweight rearward movement oil cylinder 41. One of the oil cylinder supports 42 is connected to one side end face of the lower cover plate 21.
[0029] When the present invention is in use: First, the platform support 1 is fixedly installed on one side of the slewing platform 7 of the crane. There is a boom 8 on the slewing platform 7. The size of the platform support 1 is wider than that of the slewing platform 7. Then, guiding blocks 31 are installed at both ends of the platform support 1. The carriage 2 is installed on the platform support 1. Then, the oil cylinder supports 42 at both ends of the telescopic mechanism 4 are respectively connected to the slewing platform 7 and the lower cover plate 21. Finally, the counterweight 6 is connected to the lower side of the lower cover plate 21. When the telescopic mechanism 4 performs telescopic movement, it will drive the carriage 2 to move back and forth along the platform support 1, and the counterweight 6 also moves back and forth accordingly, so as to be able to adjust the center of gravity position of the counterweight 6.
[0030] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A counterweight rearward movement mechanism for a crane, comprising a platform support. Characterized in that: A carriage is slidably connected to the platform support, a guiding mechanism is arranged between the carriage and the platform support, and a telescopic mechanism is arranged on one side of the carriage, with both ends of the telescopic mechanism connected to a slewing platform and a lower cover plate respectively; The carriage includes a lower cover plate, the lower cover plate is located below the platform support, upper cover plates are respectively fixed to the left and right sides of the upper end surface of the lower cover plate through connecting components, the platform support is located between the two connecting components, and the left and right ends of the platform support are respectively located below the two upper cover plates, and the platform support is movably connected to the connecting components and the upper cover plates; Notches are symmetrically arranged in the middle of the left and right ends of the lower cover plate, the connecting components include two cushion blocks, the two cushion blocks are respectively arranged on both sides of the corresponding notch, and the left and right ends of the lower cover plate are fixedly connected to the upper cover plates through the corresponding cushion blocks; The upper cover plate is also provided with a notch at the position corresponding to the notch of the lower cover plate.
2. The counterweight rearward movement mechanism for a crane according to claim 1, Characterized in that: The guiding mechanism includes guiding blocks symmetrically arranged on the upper and lower end faces of the platform support, and guiding grooves slidably adapted to the guiding blocks are arranged on both the upper cover plate and the lower cover plate.
3. The counterweight rearward movement mechanism for a crane according to claim 1, Characterized in that: The telescopic mechanism includes a counterweight rearward movement oil cylinder, and oil cylinder supports are arranged at both ends of the counterweight rearward movement oil cylinder, and one oil cylinder support is connected to the end face of one side of the lower cover plate.
Citation Information
Patent Citations
Combined counter weight of crawler crane
CN103342302A
Tower crane balance arm counterweight convenient for sliding installation
CN214192353U