Electric rotary suspension arm

Abstract

The utility model provides an electric rotary suspension arm which comprises a base, a suspension arm, a rotary speed reducer and a motor, the rotary speed reducer and the motor are connected with the suspension arm, the motor is connected with the rotary speed reducer, the rotary speed reducer is arranged between the base and the suspension arm, and the suspension arm realizes reciprocating rotation through the rotary speed reducer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship machinery, and particularly relates to an electric rotary hoist arm. BACKGROUND

[0002] The hatch cover crane plays an important role on such small multipurpose ships, and it is mainly responsible for lifting and operating the hatch cover. It is known that the hatch cover is not only related to the sealing of the internal space of the ship to ensure that it can resist the invasion of seawater and waves during navigation, prevent seawater from pouring into the ship cabin to cause damage to goods and equipment, but also needs to be conveniently opened and closed when the internal cabin needs to be operated, such as loading and unloading goods, equipment maintenance, etc. At this time, the hatch cover crane can accurately and efficiently complete the related operation.

[0003] And on the hatch cover crane, there are usually two small hoist arms. Although their lifting capacity is less than 1 ton, their role cannot be underestimated. During the docking of the ship, they undertake the important task of lifting various spare parts, daily necessities, maintenance tools, and other sundries from the shore to the ship. For example, when the ship needs to be maintained, and the required spare parts are stored on the shore, the small hoist arm can stably lift these parts to the corresponding position on the ship.

[0004] Moreover, this lifting process is not limited to this. After lifting the goods, the small hoist arm needs to move to a suitable position along a specific track or through its own translation function. This suitable position is usually determined according to the specific storage or use area of the ship's internal cabin. For example, to transfer the goods to the engine room area, the small hoist arm needs to first lift the goods to a position above the engine room hatch, and then accurately lift the goods into the internal area of the engine room through the small hatch, to ensure subsequent use or storage requirements.

[0005] Based on the above complex and diversified lifting task requirements, the small hoist arm generally needs to have a certain length. Sufficient length can make the operation range of the small hoist arm cover a wider area, whether it is extended to a farther shore position when lifting goods from the shore, or accurately lifting goods to different hatch positions after translation on the ship. A longer hoist arm can better meet the actual operation requirements.

[0006] Meanwhile, the rotatable feature of the small crane is also crucial. In actual operation, the small crane is usually in the storage position initially, which is usually set to reduce space occupation and avoid the influence of external forces such as wind and waves during the ship's voyage, to ensure the safety of the small crane itself and the overall safety of the ship. When the ship docks and needs to hoist the cargo on the shore, the small crane needs to rotate from the storage position to the wharf position, and through the lifting equipment such as the electric hoist installed on the crane, the cargo is lifted. Then, the small crane rotates to the appropriate storage or use area on the ship with the lifted cargo, and the whole process needs to rotate smoothly and accurately to efficiently complete the cargo hoisting work.

[0007] For some small cranes that can rotate 360°, the traditional rotation method is basically the same as that of large cranes, that is, to select appropriate motors, gears, and rotary bearings, and then to design, arrange, and install them respectively. Although this traditional method has been relatively mature in the application of large cranes, it still has many problems when applied to small cranes on multi-purpose ships.

[0008] First of all, the cost is high. Since high-quality motors, gears, and rotary bearings that meet the rotation requirements need to be selected, and these components need to be customized according to the specific size and load capacity of the small crane, the procurement cost of the entire rotation system is high. At the same time, the customization design and installation and debugging process often require professional technicians to invest a lot of time and effort, which further increases the labor cost, resulting in a significant increase in the overall cost, which is undoubtedly a considerable expense for small ship operators.

[0009] Secondly, in terms of installation requirements, this traditional rotation method has very high requirements for installation precision. The installation position and clearance between the motor, gear, and rotary bearing and other components need to be strictly controlled, and any slight deviation may cause the small crane to jam, shake, or even fail to rotate normally during rotation, affecting the normal development of its hoisting operation. To achieve such installation precision, not only professional installation tools are needed, but also installation personnel with rich experience and superb skills are required, which undoubtedly increases the difficulty and complexity of installation.

[0010] Finally, from the perspective of space occupation, the motor, gear, and rotary bearing used in this traditional rotation method have a certain volume, which will occupy a large space when arranged in the relatively limited space of a small ship. This not only makes the already tight space on the ship more cramped, but also may affect the layout and normal use of other equipment, which is not conducive to the overall space optimization and coordinated operation of the ship.

[0011] The small lifting arm of the hatch cover travelling crane has an important lifting function, but the traditional rotating mode has disadvantages such as high cost, high installation requirement, and large space occupation, and thus an optimized rotating solution that is more suitable for small ships is urgently needed to improve the efficiency and economy of ship operations. SUMMARY

[0012] One main advantage of the present application is to provide an electric rotating lifting arm, which realizes the rotating movement of the small lifting arm in a more efficient, economical and reliable manner, meets the requirements of ship lifting operations, and optimizes the application effect of the small lifting arm on small multipurpose ships.

[0013] Another advantage of the present application is to provide an electric rotating lifting arm, which adopts a compact and small rotating reducer structure, compared with the combination of the motor, gear and rotating bearing used in the traditional rotating mode, can effectively reduce the space occupation on small ships, and is more conducive to the rational layout of the limited space of the ship and the coordinated placement of other equipment, solving the problem of large space occupation in the traditional mode.

[0014] Another advantage of the present application is to provide an electric rotating lifting arm, which has a lower overall cost, avoids the high cost caused by customized parts procurement and complex installation and debugging in the traditional rotating mode, reduces the economic burden of small ship operators, and is more competitive in terms of cost compared with the traditional mode.

[0015] Another advantage of the present application is to provide an electric rotating lifting arm, which has the function of manual rotation after power failure, improves the emergency operation capability and use flexibility of the small lifting arm in special situations (such as sudden power failure), ensures that the lifting operation can continue to a certain extent, and enhances the practicality in dealing with unexpected situations.

[0016] Another advantage of the present application is to provide an electric rotating lifting arm, which is in the form of an integrated product, compared with the mode of separate design, arrangement and installation of multiple parts in the traditional mode, reduces the problems that may occur due to the cooperation of each part, has higher reliability, can more stably realize the rotating movement of the small lifting arm, and reduces the risk of affecting the normal development of the lifting operation due to equipment failure.

[0017] According to one aspect of the present application, an electric rotating lifting arm of the present application that can achieve the aforementioned and other purposes and advantages includes a base, a lifting arm, a rotating reducer connected to the lifting arm, and an electric motor, wherein the electric motor is connected to the rotating reducer, the rotating reducer is arranged between the base and the lifting arm, and the lifting arm realizes reciprocating rotation through the rotating reducer.

[0018] According to an embodiment of the present application, the slewing reducer comprises a reducer body, a slewing disc, and a transmission mechanism connected between the reducer body and the slewing disc, wherein the reducer body is connected with the slewing disc, the reducer body is connected with the motor, and the slewing disc is driven to rotate by the reducer body.

[0019] According to an embodiment of the present application, the slewing disc is arranged on the base, and the slewing disc is connected with the boom, the slewing disc is driven to rotate by the reducer body and the boom.

[0020] According to an embodiment of the present application, the transmission mechanism is drivingly connected between the reducer body and the slewing disc, and the transmission mechanism converts the axial rotation of the reducer into the circumferential rotation of the slewing disc.

[0021] According to an embodiment of the present application, the transmission mechanism comprises a driving end and a manual end, wherein the driving end and the manual end are opposite, the driving end is connected with the reducer body, and the manual end rotates synchronously with the driving end.

[0022] According to an embodiment of the present application, the boom comprises a boom support end and a boom extension end integrally extended from the boom support end, wherein the boom support end of the boom is pivotally connected to the slewing disc of the slewing reducer, and the slewing disc drives the boom support end of the boom to rotate.

[0023] According to an embodiment of the present application, the electric slewing boom further comprises a lifting device, wherein the lifting device is arranged at the end of the boom extension end for lifting and lowering goods.

[0024] According to an embodiment of the present application, the electric slewing boom further comprises at least one connecting unit, wherein the connecting unit is used to connect the boom and the lifting device.

[0025] According to an embodiment of the present application, the electric slewing boom further comprises at least one limiting block, wherein the limiting block is used to limit the rotation amplitude of the boom to avoid excessive rotation of the boom.

[0026] According to an embodiment of the present application, the limiting block comprises a first limiting block and a second limiting block, wherein the first limiting block is arranged on the base, and the second limiting block is arranged on the slewing reducer, and the first limiting block and the second limiting block are arranged in position, when the slewing reducer rotates to a certain position, the first limiting block and the second limiting block interfere, thereby preventing the boom from excessive rotation.

[0027] Further objects and advantages of the present application can be more fully understood and appreciated by reference to the following description taken in connection with the accompanying drawings.

[0028] These and other objects, features and advantages of the present application will be more fully understood and appreciated by reference to the following detailed description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of an electric slewing jib according to a first preferred embodiment of the present application.

[0030] Figure 2 is a side view of the electric slewing jib according to the first preferred embodiment of the present application.

[0031] Figure 3 is a plan view of the electric slewing jib according to the first preferred embodiment of the present application.

[0032] Figure 4 is a structural schematic view of a slewing reducer of the electric slewing jib according to the first preferred embodiment of the present application. DETAILED DESCRIPTION

[0033] The following description is presented to enable any person skilled in the art to make and use the application. Preferred embodiments are provided in the following description only as examples and modifications will be readily apparent to those skilled in the art with the benefit of this disclosure. The general principles defined herein can be applied to other embodiments, variations and modifications without departing from the spirit and scope of the application.

[0034] It should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like as can be used herein, merely describe orientations in relation to the application as presented in the figures and are not intended to denote specific orientations of or limitations on the application, unless otherwise specifically noted. The terms "coupled" and "connected", as can be used herein, mean the joining of two members together for the purposes of mechanical or electrical cooperation between them (electrically coupled or connected constitutes one or more electrical paths between the devices or modules).

[0035] It should be understood that the term "one" or "a" or "an" shall not be construed as limiting the number of parts to a single part, unless otherwise indicated. The terms "plurality" or "a plurality" shall not be construed as being limited to "two or more" unless otherwise indicated by context.

[0036] Reference will now be made to the drawings to describe the preferred embodiments of the present application in detail. Figure 1 and Figure 3As shown, an electric slewing jib according to the first preferred embodiment of the present application is illustrated in the following description. The electric slewing jib is adapted to be installed on a travelling crane of a ship for hoisting spare parts and sundries on the shore to the ship, and then moving the crane together with the cargo to a suitable position, and then hoisting the cargo from a small hatch to a cabin area.

[0037] The electric slewing jib comprises a base 10, a jib 20, a slewing reducer 30 connected to the jib 20, and an electric motor 40 connected to the slewing reducer 30. The slewing reducer 30 is arranged between the base 10 and the jib 20, and the jib 20 is reciprocally slewing through the slewing reducer 30.

[0038] The base 10 of the electric slewing jib is used to support the jib 20 to rotate within a certain range. In the preferred embodiment of the present application, the slewing reducer 30 and the electric motor 40 are arranged on the base 10, and the slewing reducer 30 and the electric motor 40 are fixed and supported by the base 10.

[0039] The jib 20 is connected to the slewing reducer 30, wherein the slewing reducer 30 is driven by the electric motor 40, and the jib 20 is moved in a rotating manner to realize slewing of the jib 20.

[0040] The slewing reducer 30 comprises a reducer body 31, a slewing disc 32, and a transmission mechanism 33 connected between the reducer body 31 and the slewing disc 32. The reducer body 31 is connected to the slewing disc 32, the reducer body 31 is connected to the electric motor 40, and the slewing disc 32 is driven to rotate by the reducer body 31. The slewing disc 32 is arranged on the base 10, and the slewing disc 32 is connected to the jib 20. The slewing disc 32 is driven by the reducer body 31 and the jib 20 is rotated. The transmission mechanism 33 is drivingly connected between the reducer body 31 and the slewing disc 32, and the transmission mechanism 33 converts the axial rotation of the reducer 31 into the circumferential rotation of the slewing disc 32.

[0041] The transmission mechanism 33 comprises a driving end 331 and a manual end 332, wherein the driving end 331 and the manual end 332 are opposite to each other, the driving end 331 is connected to the reducer body 31, and the manual end 332 rotates synchronously with the driving end 331. When the electric motor 40 is not working, the slewing disc 32 can be driven to rotate through the manual end 332 of the transmission mechanism 33.

[0042] The boom 20 comprises a boom support end 21 and a boom extension end 22 extending integrally from the boom support end 21, wherein the boom support end 21 of the boom 20 is pivotally connected to the slewing disc 32 of the slewing reducer 30, and the slewing disc 32 drives the boom support end 21 of the boom 20 to rotate. It is worth mentioning that the boom support end 21 is coaxially arranged with the slewing disc 32.

[0043] The boom extension end 22 extends outwardly from the boom support end 21 in a downward and upward direction, and an end of the boom extension end 22 is used to carry and retrieve goods.

[0044] The electric slewing boom further comprises a hoisting device 50, wherein the hoisting device 50 is arranged at the end of the boom extension end 22 and is used to hoist and lower goods. For example, in one specific example of the present application, the hoisting device 50 is implemented as an electric hoist.

[0045] The electric slewing boom further comprises at least one connecting unit 60, wherein the connecting unit 60 is used to connect the boom 20 and the hoisting device 50. For example, in one specific example of the present application, the connecting unit 60 is implemented as a hinge device.

[0046] The electric slewing boom further comprises an oiling device 70, wherein the oiling device 70 is arranged in connection with the slewing reducer 30, and the oiling device 70 is used to oil the slewing reducer 30, such as lubricating oil or hydraulic oil.

[0047] The electric slewing boom further comprises at least one limiting block 80, wherein the limiting block 80 is used to limit the rotation range of the boom 20, so as to avoid the boom from rotating more than 360°.

[0048] The limiting block 80 comprises a first limiting block 81 and a second limiting block 82, wherein the first limiting block 81 is arranged on the base 10, the second limiting block 82 is arranged on the slewing reducer 30, and the first limiting block 81 and the second limiting block 82 are arranged in a circumferential direction. When the boom 20 rotates to a specific position, the first limiting block 81 and the second limiting block 82 collide with each other, preventing the boom 82 from rotating excessively.

[0049] It is worth mentioning that the realization of 360° rotation of the conventional rotary small jib is achieved by selecting a suitable motor and gear, and matching a corresponding rotary bearing. In the design stage, professional engineers need to perform detailed design calculation according to the specific lifting weight, size and other parameters of the small jib, to determine the power of the motor, the modulus and the number of teeth of the gear, and the specifications of the rotary bearing and many other parameters, and then perform complex arrangement work on the ship, and reserve enough space for the motor, the gear box and the rotary bearing and other components, and the installation precision of each component is very high, and a long time is needed for calibration and debugging to ensure that each component is well matched and can realize stable rotary motion. The whole installation process involves many parts procurement, assembly and debugging links, resulting in high cost, and after the final installation is completed, the occupied space is large, which makes the ship look bulky to some extent, and affects the layout of other equipment on the ship and the passage of personnel.

[0050] The installation process of one side of the new electric rotary jib is relatively simple. Since it is an integrated rotary reducer and motor combination, it is a relatively compact integrated product, and after procurement, it only needs to be fixed at the corresponding connection part of the small jib according to the requirements of the instruction manual, connect the electrical circuit, and perform simple debugging, such as testing the accuracy of the rotation angle range and the coordination of the electric hoist lifting and rotation, and it can be put into use. Compared with the traditional rotary small jib, the cost is reduced by about 30% (this is only an example data, and the actual data can be calculated according to the specific cost), and the occupied space is significantly reduced, making the ship look more regular, and not causing too much interference to the layout of other equipment and personnel activities. At the same time, in the long-term use process, due to the high reliability of the integrated product, the probability of failure is relatively low compared with the traditional method, reducing the frequency and cost of maintenance and greatly facilitating the development of ship daily hoisting operations.

[0051] Through the application and comparison of the above different embodiments, it can be seen that the new electric rotary jib of the present application has significant advantages in the application scene of the hatch cover trolley jib of small multipurpose ships, and can effectively solve the problems of high cost, high installation requirement and large occupied space of the traditional rotary method, and the manual rotation after power failure further ensures the safety and reliability of the hoisting operation.

[0052] Those skilled in the art should understand that the embodiments of the present application shown in the above description and drawings are only examples and do not limit the present application. The purpose of the present application has been completely and effectively achieved. The function and structural principle of the present application has been shown and explained in the embodiments, and the embodiments of the present application can be any modification or modification without departing from the described principle.

Claims

1. An electric slewing jib characterized by, The electric rotary arm comprises a base, an arm, a rotary reduction gear connected with the arm, and an electric motor, wherein the electric motor is connected with the rotary reduction gear, the rotary reduction gear is arranged between the base and the arm, and the arm is reciprocally rotated through the rotary reduction gear.

2. The electric rotary arm according to claim 1, wherein the rotary reduction gear comprises a reduction gear body, a rotary disc, and a transmission mechanism connected between the reduction gear body and the rotary disc, wherein the reduction gear body is connected with the electric motor, and the rotary disc is driven to rotate through the reduction of the reduction gear body.

3. The electric rotary arm according to claim 2, wherein the rotary disc is arranged on the base, and the rotary disc is connected with the arm, and the rotary disc is driven to rotate by the reduction gear body, and in turn drives the arm to rotate.

4. The electric rotary arm according to claim 3, wherein the transmission mechanism is drivingly connected between the reduction gear body and the rotary disc, and the transmission mechanism converts the axial rotation of the reduction gear into the circumferential rotation of the rotary disc.

5. The electric rotary arm according to claim 4, wherein the transmission mechanism comprises a driving end and a manual end, wherein the driving end and the manual end are opposite to each other, the driving end is connected with the reduction gear body, and the manual end is synchronously rotated with the driving end.

6. The electric rotary arm according to claim 5, wherein the arm comprises an arm support end and an arm extension end integrally extended from the arm support end, wherein the arm support end of the arm is pivotally connected to the rotary disc of the rotary reduction gear, and the rotary disc drives the arm support end of the arm to rotate.

7. The electric rotary arm according to claim 6, wherein the electric rotary arm further comprises a lifting device, wherein the lifting device is arranged at the end of the arm extension end, and is used for lifting and lowering goods.

8. The electric rotary arm according to claim 7, wherein the electric rotary arm further comprises at least one connecting unit, wherein the connecting unit is used for connecting the arm and the lifting device.

9. The electric rotary arm according to claim 8, wherein the electric rotary arm further comprises at least one limiting block, wherein the limiting block is used for limiting the rotation range of the arm, and avoiding the over-rotation of the arm.

10. The electric rotary arm according to claim 9, wherein the limiting block comprises a first limiting block and a second limiting block, wherein the first limiting block is arranged on the base, and the second limiting block is arranged on the rotary reduction gear, and the first limiting block and the second limiting block are arranged in position, and when the rotary reduction gear is rotated to a specific position, the first limiting block and the second limiting block interfere, and in turn prevent the over-rotation of the arm.

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