Special gear box for direct connection motor hoisting

Abstract

The utility model discloses a special gear box for direct connection motor hoisting, which comprises a box body, an input gear shaft and an output shaft are arranged on the box body, a tapered roller bearing is arranged between the input gear shaft and the box body, the input gear shaft is connected with a motor shaft of a motor through a coupler, and the coupler is positioned in the box body. According to the utility model, the motor is connected with the speed reducer through the coupler; the coupler is arranged in the box body, and the overall structure is more compact; meanwhile, a cantilever is shorter when the motor flange is installed, and the risk that the joint of the motor and the speed reducer is broken due to frequent shaking during offshore work is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, specifically a gearbox for direct-drive motor hoisting. Background Technology

[0002] Cranes are used for loading and unloading workpieces in ports and are important production equipment in shipyards. Their main mechanisms are the hoisting mechanism and the luffing mechanism. In modern hoisting mechanisms, the high-speed end is usually connected to the high-speed shaft of the reducer via a compensating shaft and coupling, and a base-mounted brake is installed. The low-speed end is connected to the reducer and the drum via a drum coupling.

[0003] Existing gearboxes have long cantilever arms, and frequent shaking during offshore operations can easily lead to breakage at the connection between the motor and the reducer. To address this, we propose a dedicated gearbox for direct-drive motor cranes. Utility Model Content

[0004] The purpose of this utility model is to provide a gearbox specifically for direct-drive motor hoisting, in order to solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gearbox for direct-drive motor hoisting, comprising a housing, wherein an input gear shaft and an output shaft are mounted on the housing, a tapered roller bearing is mounted between the input gear shaft and the housing, and the input gear shaft is connected to the motor shaft of the motor via a coupling located inside the housing.

[0006] Preferably, the housing is equipped with a connecting flange on the side of the motor, and the motor is fixed to the connecting flange.

[0007] Preferably, the housing has a window at the coupling, and a window cover is installed at the window.

[0008] Preferably, an oil seal is installed at one end of the housing on the input gear shaft, a sleeve is installed at the other end of the housing on the input gear shaft, and a side cover is installed on the outside of the sleeve on the housing.

[0009] Preferably, the housing is equipped with a first intermediate gear shaft and a second intermediate gear shaft between the input gear shaft and the output shaft. The second intermediate gear shaft is equipped with a second gear that meshes with the input gear shaft, the first intermediate gear shaft is equipped with a first gear that meshes with the second intermediate gear shaft, and the output shaft is equipped with an output gear that meshes with the first intermediate gear shaft.

[0010] Preferably, a self-aligning bearing is installed between the housing and the output shaft, and an end cover is installed at each point of the housing through which the output shaft passes, with an oil seal installed between the end cover and the output shaft.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The motor and reducer are connected by a coupling; the coupling is inside the housing, making the overall structure more compact; at the same time, the cantilever is shorter when the motor flange is installed, reducing the risk of breakage at the connection between the motor and reducer due to frequent shaking during offshore operations. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram: 1. Side cover; 2. Sleeve; 3. Tapered roller bearing; 4. Input gear shaft; 5. Oil seal; 6. Coupling; 7. Window cover; 8. Connecting flange; 9. Motor; 10. Output shaft; 11. End cover; 12. Output gear; 13. Self-aligning bearing; 14. First gear; 15. First intermediate gear shaft; 16. Second gear; 17. Second intermediate gear shaft. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0017] Please see Figure 1In this embodiment of the utility model, a gearbox for direct-drive motor cranes includes a housing. An input gear shaft 4 and an output shaft 10 are mounted on the housing. A tapered roller bearing 3 is installed between the input gear shaft 4 and the housing. The input gear shaft 4 is connected to the motor shaft 9 of a motor 9 via a coupling 6 located inside the housing. The motor and reducer are connected via the coupling. The coupling being inside the housing results in a more compact overall structure. Simultaneously, the cantilever is shorter when the motor flange is installed, reducing the risk of breakage at the connection between the motor and reducer due to frequent shaking during offshore operations. A connecting flange 8 is installed on one side of the housing near the motor 9, and the motor 9 is fixed to the connecting flange 8. A window is provided at the coupling 6, and a window cover 7 is installed at the window for easy maintenance. An oil seal 5 is installed at one end of the housing near the input gear shaft 4, and a sleeve 2 is installed at the other end of the housing. A side cover 1 is installed on the outside of the sleeve 2.

[0018] The housing is located between the input gear shaft 4 and the output shaft 10, and a first intermediate gear shaft 15 and a second intermediate gear shaft 17 are installed. The second intermediate gear shaft 17 is equipped with a second gear 16 that meshes with the input gear shaft 4. The first intermediate gear shaft 15 is equipped with a first gear 14 that meshes with the second intermediate gear shaft 17. The output shaft 10 is equipped with an output gear 12 that meshes with the first intermediate gear shaft 15. A self-aligning bearing 13 is installed between the housing and the output shaft. An end cover 11 is installed at each through point of the housing on the output shaft 10. An oil seal 5 is installed between the end cover 11 and the output shaft 10. Standard gear pair components are used, and the parts are highly modular.

[0019] The working principle of this utility model is as follows: Direct-drive motor lifting gearboxes are generally used in the offshore lifting industry; the motor and reducer are connected by a coupling; the coupling is inside the housing, making the overall structure more compact; at the same time, the cantilever is shorter when the motor flange is installed, reducing the risk of breakage at the connection between the motor and reducer due to frequent shaking during offshore operations.

[0020] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 direct coupled motor hoist specific gearbox comprising a casing characterised in that: The housing is equipped with an input gear shaft (4) and an output shaft (10). A tapered roller bearing (3) is installed between the input gear shaft (4) and the housing. The input gear shaft (4) is connected to the motor shaft (9) of the motor (9) via a coupling (6). The coupling (6) is located inside the housing.

2. A direct coupled electric machine hoist special purpose gear box as claimed in claim 1 wherein: The housing is equipped with a connecting flange (8) on one side of the motor (9), and the motor (9) is fixed on the connecting flange (8).

3. A direct coupled electric machine hoist special purpose gear box as claimed in claim 1 wherein: The housing has a window at the coupling (6), and a window cover (7) is installed at the window.

4. A direct connected electric machine hoist special purpose gear box as claimed in claim 1, wherein: An oil seal (5) is installed at one end of the housing located on the input gear shaft (4), a sleeve (2) is installed at the other end of the housing located on the input gear shaft (4), and a side cover (1) is installed on the outside of the sleeve (2).

5. A direct connected electric machine hoist special purpose gear box as claimed in claim 1, wherein: The housing is located between the input gear shaft (4) and the output shaft (10) and is equipped with a first intermediate gear shaft (15) and a second intermediate gear shaft (17). The second intermediate gear shaft (17) is equipped with a second gear (16) that meshes with the input gear shaft (4). The first intermediate gear shaft (15) is equipped with a first gear (14) that meshes with the second intermediate gear shaft (17). The output shaft (10) is equipped with an output gear (12) that meshes with the first intermediate gear shaft (15).

6. A direct connected electric machine hoist special purpose gear box as claimed in claim 1, wherein: A self-aligning bearing (13) is installed between the housing and the output shaft. An end cover (11) is installed at the through point of the housing on the output shaft (10). An oil seal (5) is installed between the end cover (11) and the output shaft (10).

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