Limiting device, grab ship unloader lifting opening and closing mechanism and ship unloader

Abstract

The utility model relates to a limiting device, a grab ship unloader lifting opening and closing mechanism and a ship unloader, the limiting device is used for the grab ship unloader lifting opening and closing mechanism, the grab ship unloader lifting opening and closing mechanism comprises a reduction gearbox and a winding drum, and a first transmission structure is arranged on an intermediate shaft of the reduction gearbox; the limiting device comprises a stroke limiting switch and a driving mechanism, and a second transmission structure is arranged on an input shaft of the stroke limiting switch; the driving mechanism is in driving connection with the stroke limiting switch so that the stroke limiting switch can have a working position and an avoiding position, at the working position, the second transmission structure is used for being connected with the first transmission structure in a matched mode so that the winding drum can be limited to rotate within the preset working stroke through the stroke limiting switch, and at the avoiding position, the winding drum can be driven to rotate. And the second transmission structure is separated from the first transmission structure so as to relieve the limitation of the stroke limiting switch, so that the problem that the stroke limiting switch is inconvenient to disassemble and assemble in the related technology can be solved, the labor intensity of field operators is reduced, and the disassembly and assembly efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship unloaders, and in particular to a limiting device, a lifting and closing mechanism of a grab ship unloader, and a ship unloader. Background Art

[0002] In the related art, the lifting and closing mechanism of the grab bucket ship unloader is usually equipped with a travel limit switch, so that the lifting and closing mechanism of the grab bucket ship unloader can ensure that the grab bucket rises and falls within the preset working stroke through the travel limit switch. However, since the grab bucket wire rope will wear during operation, the on-site operator needs to regularly inspect and replace the grab bucket wire rope. In the actual inspection and replacement process of the grab bucket wire rope, in order to complete the inspection and replacement of the grab bucket wire rope, it is usually necessary to manually remove the travel limit switch to release the travel limit of the travel limit switch. However, since the disassembly and assembly position of the travel limit switch is often not convenient for disassembly and assembly operations, the labor intensity of the on-site operators is increased, and the efficiency is low. Utility Model Content

[0003] The purpose of the present invention is to provide a limit device, a lifting and closing mechanism of a grab ship unloader and a ship unloader, so as to solve the problem that the travel limit switch in the related art is inconvenient to disassemble and assemble, reduce the labor intensity of on-site operators, and improve the disassembly and assembly efficiency.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a limit device for a lifting and closing mechanism of a grab ship unloader, wherein the lifting and closing mechanism of the grab ship unloader includes a reduction gear box, and a drum capable of winding or releasing a wire rope is arranged on the output shaft of the reduction gear box, and a first transmission structure is arranged on an intermediate shaft that is drivingly connected to the output shaft of the reduction gear box, and the limit device includes: a stroke limit switch, and a second transmission structure is arranged on the input shaft of the stroke limit switch; and a driving mechanism that is drivingly connected to the stroke limit switch so that the stroke limit switch has a working position and an avoidance position, in which the second transmission structure is used to cooperate with the first transmission structure to limit the rotation of the drum within a preset working stroke through the stroke limit switch, and in the avoidance position, the second transmission structure is separated from the first transmission structure to release the limitation of the stroke limit switch.

[0005] Optionally, the driving mechanism includes a mounting platform and a pushing member disposed on the mounting platform, wherein the pushing member is connected to the travel limit switch, and is used to drive the travel limit switch to switch between the working position and the avoidance position through the pushing member.

[0006] Optionally, the pusher includes an electric push rod. An installation bracket and a guiding mechanism are provided on the installation platform. The housing of the electric push rod is fixedly connected to the installation bracket. The push rod of the electric push rod is connected to the travel limit switch. The guiding mechanism is used to guide the movement of the travel limit switch.

[0007] Optionally, the guiding mechanism includes a linear slide rail and a slider slidably connected to the linear slide rail. The linear slide rail is arranged on the installation platform and extends along a first direction. The slider is arranged on the travel limit switch.

[0008] Optionally, the number of the linear slide rails is configured to be two groups, and the two groups of linear slide rails are symmetrically arranged with respect to the first direction.

[0009] Optionally, a first connection bracket is provided on the travel limit switch. The first connection bracket has a first connection portion for cooperating with a connection head on the push rod.

[0010] Optionally, a second connection bracket is provided on the electric push rod. The second connection bracket has a second connection portion for cooperating with the installation bracket.

[0011] Optionally, the travel limit switch is a cam limit switch. The second transmission structure includes a driven gear arranged on the input shaft of the cam limit switch. The first transmission structure includes a driving gear arranged on the intermediate shaft of the speed reducer. In the working position, the driving gear meshes with the driven gear. In the avoidance position, the driving gear is separated from the driven gear.

[0012] The second aspect of the present disclosure provides a hoisting and closing mechanism of a grab ship unloader, including a speed reducer, a drum arranged on the output shaft of the speed reducer, and the limiting device as described above.

[0013] The third aspect of the present disclosure provides a ship unloader, including the hoisting and closing mechanism of the grab ship unloader as described above.

[0014] Through the above technical solution, that is, the limit device provided by the present disclosure, the limit device is drivingly connected to the travel limit switch through the driving mechanism, so that the driving mechanism can drive the travel limit switch to switch between the working position and the avoidance position. Specifically, when the travel limit switch is in the working position, the second transmission structure on the input shaft of the travel limit switch can be cooperatively connected with the first transmission structure on the intermediate shaft of the reduction box, so that the rotation of the drum of the hoisting and closing mechanism of the grab unloader within a preset working stroke can be restricted through the travel limit switch to wind or release the steel wire rope, thereby realizing the lifting and lowering operations of the grab of the hoisting and closing mechanism of the grab unloader; and when it is necessary to perform maintenance and replacement operations on the grab steel wire rope, for example, the driving mechanism can be used to drive the travel limit switch to switch from the working position to the avoidance position, that is, the second transmission structure on the input shaft of the travel limit switch is disengaged from the first transmission structure on the intermediate shaft of the reduction box. In this way, the restriction of the travel limit switch on the rotation of the drum of the hoisting and closing mechanism of the grab unloader within a preset working stroke can be released, so as to facilitate the on-site operator to perform subsequent maintenance and replacement operations on the grab steel wire rope. Therefore, compared with the method in the related art that requires the on-site operator to manually disassemble and assemble the travel limit switch, the adjustment of the position of the travel limit switch by driving the travel limit switch through the above driving mechanism provided by the present disclosure not only facilitates the disassembly and assembly operation of the travel limit switch on-site, but also can reduce the labor intensity of the on-site operator and improve work efficiency.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the limit device provided in the exemplary embodiment of the present disclosure, where the travel limit switch is in the working position;

[0018] Figure 2 is another perspective schematic structural diagram of the limit device provided in the exemplary embodiment of the present disclosure, where the travel limit switch is in the working position.

[0019] DESCRIPTION OF THE REFERENCE NUMERALS

[0020] 1-lifting and opening and closing mechanism of grab ship unloader; 110-reduction gearbox; 111-output shaft; 112-intermediate shaft; 120-reel; 2-travel limit switch; 210-input shaft; 3-driving mechanism; 310-mounting platform; 320-pushing member; 321-electric push rod; 3211-housing; 3212-push rod; 3213-connecting head; 330-mounting bracket; 340-guiding mechanism; 341-linear slide rail; 342-slider; 4-first connecting bracket; 410-first connecting part; 5-second connecting bracket; 510-second connecting part; 6-first transmission structure; 610-driving gear; 7-second transmission structure; 710-driven gear. DETAILED DESCRIPTION

[0021] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0022] In the present disclosure, unless otherwise stated, "inside" and "outside" refer to the inside and outside relative to the outline of the component or structure itself. In addition, it should be noted that the terms used, such as "first" and "second", are used to distinguish one element from another element and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0023] According to a first aspect of the present disclosure, a limiting device is provided, referring to Figure 1 and Figure 2 As shown, the limit device is used for the lifting and closing mechanism 1 of the grab ship unloader. The lifting and closing mechanism 1 of the grab ship unloader includes a reduction box 110. The output shaft 111 of the reduction box 110 is provided with a drum 120 capable of winding or releasing a wire rope. The intermediate shaft 112 that is transmission-connected between the reduction box 110 and the output shaft 111 is provided with a first transmission structure 6; the limit device includes a travel limit switch 2 and a driving mechanism 3. The input shaft 210 of the travel limit switch 2 is provided with a second transmission structure 7; the driving mechanism 3 is drivingly connected to the travel limit switch 2 so that the travel limit switch 2 has a working position and an avoidance position. In the working position, the second transmission structure 7 is used to cooperate with the first transmission structure 6 to limit the rotation of the drum 120 within a preset working stroke through the travel limit switch 2. In the avoidance position, the second transmission structure 7 is separated from the first transmission structure 6 to release the restriction of the travel limit switch 2.

[0024] Through the above technical solution, that is, the limit device provided by the present disclosure, the limit device is drivingly connected to the travel limit switch 2 through the driving mechanism 3, so that the driving mechanism 3 can drive the travel limit switch 2 to switch between the working position and the avoidance position. Specifically, when the travel limit switch 2 is in the working position, the second transmission structure 7 on the input shaft 210 of the travel limit switch 2 can be cooperatively connected with the first transmission structure 6 on the intermediate shaft 112 of the reduction gearbox 110, so that the rotation of the drum 120 of the hoisting and closing mechanism 1 of the grab unloader within a preset working stroke can be restricted through the travel limit switch 2 to wind or release the steel wire rope, thereby realizing the grab lifting and lowering operations of the hoisting and closing mechanism 1 of the grab unloader; and when, for example, maintenance and replacement operations of the grab steel wire rope are required, the driving mechanism 3 can be used to drive the travel limit switch 2 to switch from the working position to the avoidance position, that is, the second transmission structure 7 on the input shaft 210 of the travel limit switch 2 is disengaged from the first transmission structure 6 on the intermediate shaft 112 of the reduction gearbox 110. In this way, the restriction of the travel limit switch 2 on the rotation of the drum 120 of the hoisting and closing mechanism 1 of the grab unloader within a preset working stroke can be released, facilitating the subsequent maintenance and replacement operations of the grab steel wire rope by the on-site operators. Therefore, compared with the method in the related art that requires on-site operators to manually disassemble and assemble the travel limit switch, the adjustment of the position of the travel limit switch 2 by driving the travel limit switch 2 through the above driving mechanism 3 provided by the present disclosure not only facilitates the disassembly and assembly operations of the travel limit switch 2 on-site, but also can reduce the labor intensity of on-site operators and improve work efficiency.

[0025] It should be noted that the present disclosure does not specifically limit the specific structure of the reduction gearbox 110 of the hoisting and closing mechanism 1 of the grab unloader. The purpose is to be able to transmit the power of the motor to the output shaft 111 through the intermediate shaft 112 in the reduction gearbox 110 and drive the drum 120 to wind or release the steel wire rope under the drive of the output shaft of the motor (not shown in the figure). Those skilled in the art can adaptively design the specific structure of the reduction gearbox 110 according to actual application requirements, and the present disclosure does not specifically limit it here.

[0026] In some embodiments, referring to Figure 1 and Figure 2As shown, the travel limit switch 2 can be a cam limit switch. Exemplarily, the second transmission structure 7 can include a driven gear 710 provided on the input shaft 210 of the cam limit switch, and the first transmission structure 6 can include a driving gear 610 provided on the intermediate shaft 112 of the reduction gearbox 110. In this way, in the working position, the driving gear 610 meshes with the driven gear 710. That is, it can be understood that the intermediate shaft 112 of the reduction gearbox 110 is connected by meshing transmission of the driving gear 610 and the driven gear 710, and can drive the input shaft 210 of the cam limit switch and the gear train (not shown) inside the cam limit switch to rotate, and further can drive the cam circular disk (not shown) to rotate together. When the cam circular disk rotates to a preset position, its flange will touch the actuating mechanism of the corresponding mechanical electrical contact installed thereon, causing the mechanical electrical contact to generate a on-off signal. This on-off signal is used to implement the electrical logic control of the transmission system, so as to realize, for example, the rotation of the drum 120 of the hoisting and closing mechanism 1 of the grab ship unloader within a preset working stroke, so as to ensure that the grab of the hoisting and closing mechanism of the grab ship unloader rises or falls within a preset stroke.

[0027] When, for example, it is necessary to perform maintenance and replacement operations on the grab wire rope, the driving mechanism 3 can be used to drive the travel limit switch 2 to switch from the working position to the avoidance position. In the avoidance position, the driving gear 610 is separated from the driven gear 710. In this way, the restriction of the cam limit switch on the rotation of the drum 120 of the hoisting and closing mechanism 1 of the grab ship unloader within a preset working stroke can be released, so as to facilitate the on-site operator to perform subsequent maintenance and replacement operations on the grab wire rope.

[0028] It should be noted that the present disclosure does not specifically limit the specific structure of the cam limit switch, and those skilled in the art can select any well-known cam limit switch in the art according to actual application requirements to achieve the limit protection of the working stroke of the drum 120 of the hoisting and closing mechanism 1 of the grab ship unloader.

[0029] In some embodiments, referring to Figure 1 and Figure 2 As shown, the driving mechanism 3 can include a mounting platform 310 and a pushing member 320 provided on the mounting platform 310. The pushing member 320 is connected to the travel limit switch 2 and is used to drive the travel limit switch 2 to switch between the working position and the avoidance position through the pushing member 320. The overall structure is simple and convenient for installation and manufacturing.

[0030] Among them, the pushing member 320 can be adaptively designed according to actual application requirements. For example, in some embodiments, referring to Figure 1 and Figure 2As shown, the pusher 320 may include an electric push rod 321. An installation bracket 330 and a guiding mechanism 340 are provided on the installation platform 310. The housing 3211 of the electric push rod 321 is fixedly connected to the installation bracket 330, and the push rod 3212 of the electric push rod 321 is connected to the travel limit switch 2. In this way, since the electric push rod 321 can control the thrust and the movement speed of the push rod 3212 more precisely, it helps to ensure the stable movement of the travel limit switch 2, and the guiding mechanism 340 is used to guide the movement of the travel limit switch 2, which is beneficial to improving the smoothness of the movement and enhancing the stability of the system.

[0031] Exemplarily, referring to Figure 1 and Figure 2 As shown, the guiding mechanism 340 may include a linear slide rail 341 and a slider 342 slidably connected to the linear slide rail 341. The linear slide rail 341 is provided on the installation platform 310 and extends along the first direction. The slider 342 is provided on the travel limit switch 2, which improves the smoothness of the movement of the travel limit switch 2 and has high reliability. And since the guiding and limiting can be realized through the guiding mechanism 340, the risk of misalignment of the travel limit switch 2 can also be avoided, which is convenient for the disassembly and assembly operation of the travel limit switch 2 and improves the work efficiency.

[0032] It should be noted that the connection and fixing methods between the above-mentioned linear slide rail 341 and the installation platform 310, and between the slider 342 and the travel limit switch 2 can be connected by means of fasteners such as welding or bolts. The present disclosure does not make specific limitations in this regard. The purpose is to be able to stably connect the linear slide rail 341 to the installation platform 310 and stably connect the slider 342 to the travel limit switch 2.

[0033] In addition, in some embodiments, referring to Figure 2 As shown, the number of the linear slide rails 341 can be configured as two groups, and the two groups of linear slide rails 341 are symmetrically arranged with respect to the first direction, which is beneficial to further improving the smoothness and stability of the movement of the travel limit switch 2.

[0034] In some embodiments, referring to Figure 1 and Figure 2 As shown, a first connection bracket 4 may be provided on the travel limit switch 2. The first connection bracket 4 has a first connection portion 410 for cooperating with the connection head 3213 on the push rod 3212, so as to facilitate stably connecting the travel limit switch 2 to the connection head 3213 on the push rod 3212 of the electric push rod 321. The structure is simple and convenient for installation operation.

[0035] In addition, as Figure 1 and Figure 2As shown, a second connecting bracket 5 can be provided on the electric push rod 321. The second connecting bracket 5 has a second connecting portion 510 for cooperating with the mounting bracket 330, so as to stably connect the electric push rod 321 to the mounting bracket 330. The structure is simple and the installation operation is convenient.

[0036] In addition, it should be noted that since a first connecting bracket 4 is provided on the travel limit switch 2 and a second connecting bracket 5 is provided on the electric push rod 321 to achieve a fixed connection with the connecting head 3213 on the corresponding push rod 3212 and the mounting bracket 330, technical personnel in this field can adaptively design the specific structure of the first connecting bracket 4 and the second connecting bracket 5 according to the specific appearance structure of the travel limit switch 2 and the electric push rod 321, which is convenient for realizing the connection requirements of different types and models of travel limit switches 2 and electric push rods 321, and also convenient for realizing the subsequent disassembly, assembly and replacement of the travel limit switch 2 and the electric push rod 321.

[0037] In addition, the first connecting portion 410 on the first connecting bracket 4 and the second connecting portion 510 on the second connecting bracket 5 can both be configured as, for example, a through hole. Accordingly, the connecting head 3213 on the push rod 3212 and the mounting bracket 330 are also formed with a through hole, so that, for example, a bolt can pass through, and after the bolt passes through, the thread can be locked by, for example, a nut. The structure is simple and the installation operation is convenient. Alternatively, the first connecting portion 410 on the first connecting bracket 4 and the second connecting portion 510 on the second connecting bracket 5 can both be configured as a slot, and a slot is provided on the inner wall of the slot. There is a limiting hole, and accordingly, the connecting head 3213 on the push rod 3212 and the mounting bracket 330 are formed with an insert block that can be inserted into the slot, and a limiting protrusion that cooperates with the limiting hole is formed on the outer wall of the insert block to achieve a plug-in limiting connection. The present disclosure is not limited to this, and those skilled in the art can adaptively design according to actual application requirements, the purpose of which is to be able to stably connect the travel limit switch 2 to the connecting head 3213 on the push rod 3212 of the electric push rod 321, and to stably connect the electric push rod 321 to the mounting bracket 330.

[0038] Of course, it should be noted that the specific embodiment in which the pusher 320 is configured as, for example, an electric push rod 321 is exemplary. In other embodiments not shown in the figure, the pusher 320 may also be, for example, a pneumatic push rod or a rodless cylinder, etc. The present disclosure does not specifically limit such deformation modes, and its purpose is to enable the travel limit switch 2 to switch between the above-mentioned working position and the avoidance position through the pusher 320. In addition, the present disclosure does not specifically limit the specific appearance structure of the mounting platform 310 and the mounting bracket 330, and those skilled in the art can design them adaptively according to actual application requirements.

[0039] According to a second aspect of the present disclosure, there is provided a hoisting and opening / closing mechanism for a grab ship unloader, including a speed reducer 110, a drum 120 disposed on an output shaft 111 of the speed reducer 110, and the above-mentioned limiting device. The hoisting and opening / closing mechanism 1 of the grab ship unloader can solve the problem that the travel limit switch in the related art is not convenient for disassembly and assembly, can reduce the labor intensity of on-site operators, and improve the disassembly and assembly efficiency. In addition, the hoisting and opening / closing mechanism 1 of the grab ship unloader also has all the beneficial effects of the above-mentioned limiting device, which will not be elaborated herein by the present disclosure.

[0040] According to a third aspect of the present disclosure, there is provided a ship unloader, including the above-mentioned hoisting and opening / closing mechanism 1 of the grab ship unloader. In addition, the ship unloader also has all the beneficial effects of the above-mentioned hoisting and opening / closing mechanism 1 of the grab ship unloader, which will not be elaborated herein by the present disclosure.

[0041] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0042] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0043] In addition, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A limit device for a lifting and closing mechanism of a grab ship unloader, wherein the lifting and closing mechanism of the grab ship unloader comprises a reduction box, a drum capable of winding or releasing a wire rope is arranged on the output shaft of the reduction box, and a first transmission structure is arranged on the intermediate shaft that is drivingly connected to the output shaft of the reduction box, characterized in that: The limiting device comprises: A travel limit switch, wherein a second transmission structure is disposed on an input shaft of the travel limit switch; and A driving mechanism is connected to the travel limit switch so that the travel limit switch has a working position and an avoidance position. In the working position, the second transmission structure is used to cooperate with the first transmission structure to limit the rotation of the reel within a preset working stroke through the travel limit switch. In the avoidance position, the second transmission structure is separated from the first transmission structure to release the restriction of the travel limit switch.

2. The position-limiting device according to claim 1, wherein, The driving mechanism includes a mounting platform and a pushing member arranged on the mounting platform, wherein the pushing member is connected to the travel limit switch and is used to drive the travel limit switch to switch between the working position and the avoidance position through the pushing member.

3. The limiting device according to claim 2, wherein The pushing member includes an electric push rod, a mounting bracket and a guiding mechanism are arranged on the mounting platform, a housing of the electric push rod is fixedly connected to the mounting bracket, a push rod of the electric push rod is connected to the travel limit switch, and the guiding mechanism is used to guide the movement of the travel limit switch.

4. The limit device according to claim 3, characterized in that, The guiding mechanism comprises a linear slide rail and a slider slidably connected to the linear slide rail. The linear slide rail is arranged on the mounting platform and extends along a first direction. The slider is arranged on the travel limit switch.

5. The limiting device according to claim 4, characterized in that, The number of the linear guide rails is configured to be two groups, and the two groups of the linear guide rails are symmetrically arranged with respect to the first direction.

6. The limit device according to claim 3, characterized in that, The travel limit switch is provided with a first connecting bracket, and the first connecting bracket has a first connecting portion for matching with the connecting head on the push rod.

7. The limit device according to claim 6, wherein The electric push rod is provided with a second connecting bracket, and the second connecting bracket has a second connecting portion for matching with the mounting bracket.

8. The limit device according to claim 1, characterized in that, The travel limit switch is a cam limit switch, the second transmission structure includes a driven gear arranged on the input shaft of the cam limit switch, and the first transmission structure includes a driving gear arranged on the intermediate shaft of the reduction box. In the working position, the driving gear is engaged with the driven gear, and in the avoidance position, the driving gear is separated from the driven gear.

9. A hoisting and closing mechanism of a grab unloader, characterized in that, It comprises a reduction box, a reel arranged on the output shaft of the reduction box, and the limiting device according to any one of claims 1 to 8.

10. A ship unloader, characterized in that, It includes the lifting and closing mechanism of the grab ship unloader as described in claim 9.

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