Roller conveying device capable of ascending and descending

Abstract

The roller conveying device comprises a lower shell, a jacking device, a middle shell, an electric roller and an upper shell, an opening is formed in the top of the lower shell, the jacking device is arranged at the bottom in the lower shell, the middle shell is movably arranged in the lower shell and above the jacking device, and the electric roller is arranged in the middle shell. An opening is formed in the top of the middle shell, the electric roller is installed in the middle shell, a roller body of the electric roller protrudes out of the opening in the top of the middle shell, an opening is formed in the bottom of the upper shell, the upper shell is fixed to the top of the lower shell, and a window is formed in the top of the upper shell. When the roller conveying device is used, the lifting or ejecting force of the jacking device is fixed, and when goods are blocked in the loading and unloading process, the positive pressure between the roller and the tray is not very high even if the load is large, so that the roller can slip relative to the tray, and the overload of the motor is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of logistics and warehousing, and particularly relates to a roller conveying device capable of lifting. BACKGROUND

[0002] In the logistics and warehousing industry, sea-air containers (sea shipping containers or air cargo containers) are widely used for cargo transportation. In order to improve the loading and unloading efficiency, a track (generally a non-powered roller track) and a roller conveying device are provided on the bottom plate of many sea-air containers. The cargo is stacked on a pallet, and during the loading and unloading process, the roller conveying device drives the pallet to move along the track. The rollers of the existing roller conveying device need to be raised above the track surface in order to make close contact with the pallet. However, during the loading and unloading process, there may be cases of cargo blockage (unconventional stoppage of the pallet). If the total weight of the pallet (including the cargo) is a large load, the pressure between the roller and the pallet is large, and at this time the roller will stop rotating (in the case of a small load, the roller slips, which is not discussed in this application), causing the motor of the roller conveying device to overload, and even be scrapped due to overloading. Therefore, it is urgent to research a roller conveying device that can avoid motor overload in the case of large load and cargo blockage. SUMMARY

[0003] To this end, the utility model provides a roller conveying device capable of lifting to solve the above technical problems.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0005] The utility model discloses a roller conveying device capable of lifting, which comprises a lower shell, a jacking device, an intermediate shell, an electric roller and an upper shell. The top of the lower shell is provided with an open top. The jacking device is arranged at the bottom of the lower shell. The intermediate shell is movably arranged in the lower shell and above the jacking device. The top of the intermediate shell is provided with an open top. The electric roller is installed in the intermediate shell, and the roller of the electric roller protrudes from the open top of the intermediate shell. The bottom of the upper shell is provided with an open top. The upper shell is fixed to the top of the lower shell. The top of the upper shell is provided with a window. When the jacking device is lifted, the intermediate shell moves upward under the action of the jacking device, and the roller of the electric roller can protrude from the window.

[0006] Further, the jacking device is a gas bag, a liquid bag, a gas cylinder, a liquid cylinder, an electric push rod, a lead screw or a cam mechanism. A plurality of jacking devices are evenly distributed in the lower shell (310).

[0007] Further, a lower partition plate is arranged vertically in the lower shell, the lower partition plate divides the inner cavity of the lower shell into a left lower cavity and a right lower cavity, the air bag is arranged in the right lower cavity, and a gas nozzle is arranged on one side of the air bag and in the left lower cavity.

[0008] Further, an upper partition plate is arranged vertically in the upper shell, the upper partition plate divides the inner cavity of the upper shell into a left upper cavity and a right upper cavity, the window is communicated with the right upper cavity, and a controller for controlling the electric roller is arranged in the left upper cavity.

[0009] Further, the upper partition plate corresponds to the position of the lower partition plate.

[0010] Further, the upper end of the lower partition plate is provided with a lower wire hole, the lower end of the upper partition plate is provided with an upper wire hole, the upper wire hole and the lower wire hole correspond to each other and form a strip-shaped wire hole, and the connecting line of the controller and the electric roller passes through the strip-shaped wire hole.

[0011] Further, the left and right ends of the middle shell are respectively provided with limiting sliding blocks, the limiting sliding block at the left end abuts against the right side surface of the lower partition plate or the upper partition plate, and the limiting sliding block at the right end abuts against the right inner wall of the right lower cavity or the right upper cavity.

[0012] Further, the open outer edges of the lower shell and the upper shell are respectively provided with flanges, and the upper shell and the lower shell are connected through the flanges and bolts.

[0013] The utility model discloses a roller conveying device that can be lifted, which comprises a lower shell, a jacking device, a middle shell, an electric roller and an upper cover plate.

[0014] The utility model has the advantages of:

[0015] The roll conveying device provided by the utility model can be installed between guide rails (for example, roll guide rails), a plurality of roll conveying devices are installed along the extension direction of the guide rails, and the plurality of roll conveying devices are arranged at intervals; a power connector and an air source connector are arranged at the tail part of the sea-air container, and the power connector and the air source connector are connected with a control console and an air compressor in a loading and unloading site respectively; the control console controls the working state of each electric roll (positive and negative) and the action of each jack (for example, the controller controls the inflation and deflation of each air bag); after the air bag is inflated, the volume of the air bag is expanded, the middle shell is lifted upward, and the roll of the electric roll protrudes from the window; under the condition that the inflation pressure is constant, the lifting or ejecting force of the air bag is constant; when the total weight of the tray and the goods on the tray exceeds the lifting or ejecting force of the air bag, the electric roll and the middle shell will be forced to move downward by a certain distance, so that the upper edge of the roll is flush with the upper edge of the track; at this time, the normal pressure between the roll and the tray is equal to the ejecting force of the air bag; therefore, when the loading and unloading process encounters a situation of goods blocking, even in the case of large load, the normal pressure between the roll and the tray will not be particularly high, so that the roll can rotate relative to the tray (that is, the roll slips), thereby avoiding motor overload.

[0016] The foregoing summary is merely intended to illustrate the present description and is not intended to limit in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features will be readily apparent to those skilled in the art by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating labor.

[0018] The structures, proportions, sizes and the like shown in the present description are only used to cooperate with the content disclosed in the present description, so that those skilled in the art can understand and read, and are not used to limit the limiting conditions of the utility model that can be implemented, so they do not have technical significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that the utility model can produce, should still fall within the scope of the technical content disclosed by the utility model.

[0019] Figure 1 A structure schematic view of the roll conveying device provided by the utility model embodiment 1 (electric roll is retracted) is provided;

[0020] Figure 2The structure schematic view of the roller conveying device capable of lifting provided by the embodiment 1 of the utility model (the electric roller protrudes);

[0021] Figure 3 The explosion structure schematic view of the roller conveying device capable of lifting provided by the embodiment 1 of the utility model;

[0022] Figure 4 The explosion structure schematic view of another view of the roller conveying device capable of lifting provided by the embodiment 1 of the utility model;

[0023] Figure 5 The installation schematic view of the lower shell and the air bag of the roller conveying device capable of lifting provided by the embodiment 1 of the utility model;

[0024] Figure 6 The position relation schematic view of the air bag, the middle shell and the electric roller of the roller conveying device capable of lifting provided by the embodiment 1 of the utility model;

[0025] Figure 7 The installation schematic view of the upper shell and the controller of the roller conveying device capable of lifting provided by the embodiment 1 of the utility model;

[0026] Figure 8 The position schematic view of the roller conveying device capable of lifting provided by the embodiment 1 of the utility model installed on the sea-air box;

[0027] Figure 9 The structure schematic view of the roller conveying device capable of lifting provided by the embodiment 2 of the utility model;

[0028] Figure 10 The overhead structure schematic view of the roller conveying device capable of lifting provided by the embodiment 2 of the utility model;

[0029] Figure 11 The position schematic view of the roller conveying device capable of lifting provided by the embodiment 2 of the utility model installed on the sea-air box.

[0030] In the drawing: 100, sea-air box; 200, track; 300, roller conveying device; 310, lower shell; 311, lower partition plate; 312, lower threading hole; 320, air bag; 330, middle shell; 331, limiting sliding block; 340, electric roller; 350, upper shell; 351, window; 352, upper partition plate; 353, upper threading hole; 360, controller; 370, upper cover plate. DETAILED DESCRIPTION

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0032] Example 1

[0033] like Figures 1-8 As shown, this embodiment provides a liftable roller conveyor 300, including a lower housing 310, a lifter, an intermediate housing 330, an electric roller 340, and an upper housing 350. The lower housing 310 has an opening at its top. The lifter is located at the bottom of the lower housing 310. The intermediate housing 330 is movably disposed within the lower housing 310 and above the lifter. The intermediate housing 330 also has an opening at its top. The electric roller 340 is installed in the intermediate housing 330, with its roller protruding from the opening at the top of the intermediate housing 330. The upper housing 350 has an opening at its bottom and is fixed to the top of the lower housing 310. The upper housing 350 has a window 351 at its top. When the lifter is inflated, the intermediate housing 330 moves upward under the action of the lifter, and the roller of the electric roller 340 protrudes from the window 351.

[0034] Exemplarily, the lifting device can be an airbag 320, a liquid bladder, a cylinder, a hydraulic cylinder, an electric push rod, a lead screw, or a cam mechanism; the number of lifting devices can be one or more, and multiple lifting devices are evenly distributed within the lower housing 310. In this embodiment, the lifting device is a strip-shaped or rectangular airbag 320; two airbags 320 are provided, and the two airbags 320 are laid side by side. It should be noted that the shape of the airbag 320 is not limited to strip or rectangle, but can also be circular, annular, cylindrical, etc.; the number of airbags is also not limited to two, but can also be one, three, four, etc.

[0035] The roller conveying device 300 provided by the utility model can be installed between guide rails (for example, roller guide rails), a plurality of roller conveying devices 300 are installed along the extension direction of the guide rails, and the plurality of roller conveying devices 300 are arranged at intervals; a power connector and an air source connector are arranged at the tail part of the sea-air container 100, and the power connector and the air source connector are connected with a control console and an air compressor in a loading and unloading site respectively; the control console controls the working state (positive and reverse) of each electric roller 340 and the inflation and deflation of each air bag 320; after the air bag 320 is inflated, the volume of the air bag 320 is expanded, the middle shell 330 is lifted upwards, and the roller of the electric roller 340 protrudes from the window 351; under the condition that the inflation pressure is constant, the lifting or ejecting force of the air bag 320 is constant; when the total weight of the tray and the goods on the tray exceeds the lifting or ejecting force of the air bag 320, the electric roller 340 and the middle shell 330 are forced to move downwards by a certain distance, so that the upper edge of the roller is flush with the upper edge of the track 200; at this time, the positive pressure between the roller and the tray is equal to the ejecting force of the air bag 320; therefore, when the loading and unloading process encounters a situation of goods blocking, even in the case of large load, the positive pressure between the roller and the tray will not be particularly high, so that the roller can rotate relative to the tray (that is, the roller slips), thereby avoiding motor overload; the lifting or ejecting force of the air bag 320 is related to the air pressure of the air bag 320, and the air bag 320 can be inflated with appropriate air pressure according to needs. After the goods are loaded, the pressure in the air bag 320 can be released; at this time, the height of the middle shell 330 and the electric roller 340 is lowered, and the weight of the tray is completely borne by the track 200 or the bottom plate, thereby reducing the probability of goods shaking when braking or accelerating suddenly, and the tray will not impact the roller.

[0036] In the embodiment, the lower shell 310 is provided with a vertically arranged lower partition plate 311, the lower partition plate 311 divides the inner cavity of the lower shell 310 into a left lower cavity and a right lower cavity, the air bag 320 is arranged in the right lower cavity, one side of the air bag 320 is provided with an air nozzle, and the air nozzle is arranged in the left lower cavity. The air bag 320 and the air nozzle are arranged in two cavities respectively, and after the air bag 320 is released, the middle shell 330 will not press on the air nozzle. The left side wall of the left lower cavity is provided with a connector (omitted in the figure, only the mounting hole of the connector is shown) connected with a gas pipeline arranged in the sea-air container 100, and the connector is connected with the air nozzle through a gas pipe.

[0037] In the embodiment, the upper shell 350 is provided with an upper partition plate 352 arranged vertically, which separates the inner cavity of the upper shell 350 into a left upper cavity and a right upper cavity, the window 351 communicates with the right upper cavity, and the controller 360 for controlling the electric roller 340 is installed in the left upper cavity. The controller 360 is relatively stationary in the whole shell by separating the controller 360 and the electric roller 340 by the upper partition plate 352, avoiding damage of the controller 360 caused by the sea container 100 being jolted and shaken; and the electric roller 340 is fixed in the middle shell 330, the middle shell 330 can only be lifted and lowered in a small range, and the air bag 320 after pressure relief has a certain buffering and damping function, avoiding damage of the electric roller 340 caused by shaking and vibration.

[0038] In the embodiment, the upper partition plate 352 corresponds to the position of the lower partition plate 311; the upper end of the lower partition plate 311 is provided with a lower wire hole 312, and the lower end of the upper partition plate 352 is provided with an upper wire hole 353, the upper wire hole 353 and the lower wire hole 312 correspond to each other and form a strip-shaped wire hole. In this way, when the electric roller 340 is lifted and lowered, the connecting line between the controller 360 and the electric roller 340 passes through the strip-shaped wire hole, and the connecting line can move along the strip-shaped wire hole.

[0039] In the embodiment, the left and right ends of the middle shell 330 are respectively provided with limiting sliding blocks 331, the limiting sliding block 331 at the left end abuts against the right side surface of the lower partition plate 311 or the upper partition plate 352, and the limiting sliding block 331 at the right end abuts against the right side inner wall of the right lower cavity or the right upper cavity. In this way, the middle shell 330 is more stable during lifting and lowering. Exemplarily, the limiting sliding block 331 can be made of hard plastic with a small friction coefficient.

[0040] In the embodiment, the open outer edges of the lower shell 310 and the upper shell 350 are respectively provided with flanges, and the upper shell 350 and the lower shell 310 are connected by the flanges and bolts. Exemplarily, the flanges are welded and fixed with the upper shell 350 or the lower shell 310; the bolts and the flanges facilitate the assembly of the whole machine and the connection is reliable.

[0041] Embodiment 2

[0042] As shown in Figure 9 and 10 , the embodiment provides another roller conveying device 300 which can be lifted and lowered, and the structure thereof is basically the same as that of the embodiment 1, and the same parts are not introduced, and the difference is that an upper cover plate 370 is used instead of the upper shell 350.

[0043] Specifically, the top of the lower shell 310 is provided with an opening, the jacking device is arranged at the bottom of the lower shell 310, the middle shell 330 is movably arranged in the lower shell 310 and arranged above the jacking device, the top of the middle shell 330 is provided with an opening, the electric roller 340 is installed in the middle shell 330 and the roller barrel of the electric roller 340 protrudes from the top opening of the middle shell 330, the upper cover plate 370 is fixed on the top of the lower shell 310, the top of the upper cover plate 370 is provided with a window 351, when the jacking device is inflated, the middle shell 330 moves upward under the action of the jacking device, and the roller barrel of the electric roller 340 can protrude from the window 351.

[0044] Embodiments 1 and 2 provide two slightly different liftable roller conveying devices 300, and different liftable roller conveying devices 300 are selected according to the installation mode. The liftable roller conveying device 300 of the present embodiment is installed in a sunken manner, as shown in Figure 11 It can be seen that the entire device is sunken into the bottom plate of the sea-air box 100, and the upper cover plate 370 is flush with the bottom plate of the sea-air box 100.

[0045] In the description of the present specification, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0047] In the present application, unless specifically defined otherwise, the terms "mounting", "connection", "connecting", "fixed", and the like should be construed broadly and do not necessarily mean fixedly connected, but can also mean detachably connected, or integrated; can be mechanical connection, or electrical connection, or communication; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements, or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless specifically defined otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] The above disclosure provides many different implementations or examples for implementing the different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of the specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0050] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A roller conveyor (300) that can be raised and lowered, characterized in that, The device comprises a lower shell (310), a jacking device, an intermediate shell (330), an electric roller (340) and an upper shell (350), the top of the lower shell (310) is provided with an opening, the jacking device is arranged at the bottom of the lower shell (310), the intermediate shell (330) is movably arranged in the lower shell (310) and above the jacking device, the top of the intermediate shell (330) is provided with an opening, the electric roller (340) is installed in the intermediate shell (330) and the roller barrel of the electric roller (340) protrudes from the top opening of the intermediate shell (330), the bottom of the upper shell (350) is provided with an opening, the upper shell (350) is fixed on the top of the lower shell (310), the top of the upper shell (350) is provided with a window (351), when the jacking device is jacked up, the intermediate shell (330) moves upward under the action of the jacking device, and the roller barrel of the electric roller (340) can protrude from the window (351).

2. The liftable roller conveyor (300) according to claim 1, characterized in that The jacking device is an air bag (320), a liquid bag, an air cylinder, a liquid cylinder, an electric push rod, a lead screw or a cam mechanism; one or more jacking devices are arranged in the lower shell (310) and are uniformly distributed in the lower shell (310).

3. The liftable roller conveyor (300) according to claim 2, characterized in that A lower partition plate (311) is arranged vertically in the lower shell (310), the lower partition plate (311) divides the inner cavity of the lower shell (310) into a left lower cavity and a right lower cavity, the air bag (320) is arranged in the right lower cavity, and one side of the air bag (320) is provided with an air nozzle arranged in the left lower cavity.

4. The liftable roller conveyor (300) according to claim 3, characterized in that An upper partition plate (352) is arranged vertically in the upper shell (350), the upper partition plate (352) divides the inner cavity of the upper shell (350) into a left upper cavity and a right upper cavity, the window (351) communicates with the right upper cavity, and a controller (360) for controlling the electric roller (340) is installed in the left upper cavity; the upper partition plate (352) corresponds to the position of the lower partition plate (311).

5. The liftable roller conveyor (300) according to claim 4, characterized in that The upper end of the lower partition plate (311) is provided with a lower threading hole (312), the lower end of the upper partition plate (352) is provided with an upper threading hole (353), the upper threading hole (353) and the lower threading hole (312) correspond to each other and form a strip-shaped threading hole, and the connecting line of the controller (360) and the electric roller (340) passes through the strip-shaped threading hole.

6. The liftable roller conveyor (300) according to claim 4, characterized in that The left and right ends of the intermediate shell (330) are respectively provided with limit sliding blocks (331), the limit sliding block (331) at the left end abuts against the right side surface of the lower partition plate (311) or the upper partition plate (352), and the limit sliding block (331) at the right end abuts against the right side inner wall of the right lower cavity or the right upper cavity.

7. The liftable roller conveyor (300) according to claim 1, characterized in that The outer edges of the openings of the lower shell (310) and the upper shell (350) are respectively provided with flanges, and the upper shell (350) and the lower shell (310) are connected through the flanges and bolts.

8. A vertically movable roller conveyor (300), characterized in that It comprises a lower shell (310), a jacking device, an intermediate shell (330), an electric roller (340) and an upper cover plate (370), the top of the lower shell (310) is provided with an opening, the jacking device is arranged at the bottom of the lower shell (310), the intermediate shell (330) is movably arranged in the lower shell (310) and above the jacking device, the top of the intermediate shell (330) is provided with an opening, the electric roller (340) is installed in the intermediate shell (330) and the roller barrel of the electric roller (340) protrudes from the top opening of the intermediate shell (330), the upper cover plate (370) is fixed on the top of the lower shell (310), the top of the upper cover plate (370) is provided with a window (351), when the jacking device is jacked up, the intermediate shell (330) moves upward under the action of the jacking device, and the roller barrel of the electric roller (340) can protrude from the window (351).

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