Lifting device and conveying system

Abstract

The application relates to a lifting device and a conveying system, comprising a lifting tray having a first end and a second end arranged oppositely in a first direction; a lifting positioning unit arranged at the first end and the second end; a first column unit arranged at the opposite side of the first end and a second column unit arranged at the opposite side of the second end, the lifting positioning unit being used for positioning cooperation with the first column unit and the second column unit when the lifting tray is in a high position; a driving unit arranged on the first column unit and the second column unit; a counterweight unit movably arranged on the first column unit and the second column unit, the counterweight unit being connected with the lifting tray through the driving unit; and the lifting tray further having a third end in a second direction, a high-position positioning unit being arranged at the third end, the high-position positioning unit being used for positioning cooperation with an upper conveying line body when the lifting tray is in the high position.

Description

Technical Field

[0001] This application relates to the technical field of automated conveying equipment, and in particular to a lifting device and conveying system. Background Technology

[0002] Currently, most automotive welding production lines adopt a double-layer conveyor line structure design, which includes an upper conveyor line and a lower conveyor line. After the conveyor trolley carries the workpiece to the target station through the upper conveyor line, the empty conveyor trolley returns to the loading station through the lower conveyor line. Elevators are also arranged at the ends of the upper and lower conveyor lines, and the conveyor trolley moves between the upper and lower conveyor lines with the help of the elevators.

[0003] Traditional lifting technologies mainly employ two types of lifting platforms: scissor lifts and cantilever lifts. Scissor lifts have low lifting and positioning accuracy and slow cycle time, making them unsuitable for high-speed production and affecting processing efficiency. Cantilever lifts, due to the limited force on the cantilever arm, are prone to fatigue bending deformation, affecting positioning accuracy and preventing the conveyor trolley from moving normally and safely between the upper and lower conveyor lines. Utility Model Content

[0004] Therefore, it is necessary to provide a lifting device and conveying system to address the problems of low positioning accuracy, which affects processing efficiency and poor reliability.

[0005] A first aspect of this application provides a lifting device, comprising:

[0006] A lifting pallet having a first end and a second end that are arranged opposite to each other in a first direction;

[0007] A lifting and positioning unit is disposed at the first end and the second end;

[0008] A first column unit and a second column unit, wherein the first column unit is disposed on the opposite side of the first end and the second column unit is disposed on the opposite side of the second end, and when the lifting pallet is in a high position, the lifting positioning unit is used to position and cooperate with the first column unit and the second column unit.

[0009] A drive unit is disposed on the first column unit and the second column unit;

[0010] A counterweight unit, which is vertically and movably disposed on the first column unit and the second column unit, and the counterweight unit is connected to the lifting tray via the drive unit; and

[0011] The high-positioning unit, wherein the lifting pallet also has a third end in the second direction, the high-positioning unit is disposed at the third end, and when the lifting pallet is in a high position, the high-positioning unit is used to position and cooperate with the upper conveyor line.

[0012] In this lifting device, a first column unit and a second column unit are simultaneously arranged on both sides of the lifting pallet in a first direction. A drive unit is installed on each of the first and second column units. The lifting pallet is connected to a counterweight unit arranged within the first and second column units via the drive units. On one hand, the counterweight unit can form a force balance with the lifting pallet, ensuring the stability of the lifting pallet installation. On the other hand, when the two drive units output driving force synchronously, they can simultaneously output power to the lifting pallet from both sides in the first direction, thereby driving the lifting pallet to rise quickly and smoothly from a low position to a high position. This increases the operating speed of the lifting pallet and helps ensure production cycle time and processing efficiency. In terms of efficiency, the lifting pallet is supported on both sides by the first and second column units, and is not limited by the limited force of the cantilever, thus avoiding fatigue bending deformation. When the lifting pallet reaches the high position, the lifting positioning unit and the high-position positioning unit can act sequentially or simultaneously. The lifting positioning unit connects with the corresponding first and second column units to achieve positioning, and the high-position positioning unit connects with the upper conveyor line to achieve positioning. This can form a multi-directional positioning effect for the lifting pallet, greatly improving the positioning accuracy of the lifting pallet and helping to ensure the normal and safe flow of the conveyor trolley on the lifting pallet between the upper and lower conveyor lines.

[0013] The technical solution of this application will be further described below:

[0014] In one embodiment, both the first column unit and the second column unit include a base, a support, a column, a column guide rail, and a buffer block. The base is disposed at the bottom of the column, the support is disposed on the side of the column, and the column is used to be installed on the work site via the base and the support. The column guide rail is disposed along the height direction of the column on the side of the column facing the lifting pallet, and the column guide rail moves in cooperation with the lifting pallet. The buffer block is disposed at the top of the column and flexibly abuts against the lifting pallet when it is raised to the high position.

[0015] In one embodiment, the drive unit includes a main shaft, a bearing housing, a sprocket, a chain, a coupling, and a power source. The main shaft is rotatably mounted on the top of the column via the bearing housing, and the main shaft is driven by the power source via the coupling. The sprocket is sleeved on the main shaft and can rotate synchronously with the main shaft. The chain is wound around the outside of the sprocket, and one end of the chain is connected to the lifting pallet, while the other end of the chain is connected to the counterweight unit.

[0016] In one embodiment, the drive unit further includes a locking gear, a pin seat, and a stop pin. The locking gear is fixedly mounted on the main shaft, the pin seat is located at the top of the column, and the pin seat has a hole axially aligned with the tooth groove of the locking gear. The stop pin is detachably mounted on the pin seat. When maintenance is required on the lifting device, the stop pin is removed so that it passes through the hole and is inserted into the tooth groove of the locking gear.

[0017] In one embodiment, the lifting pallet includes a pallet, a roller seat, a pallet roller, a chain mounting seat, and a first chain connector. The roller seat and the chain mounting seat are both mounted on a first end and a second end of the pallet along a first direction. The pallet roller is rotatably disposed on the roller seat and rolls in contact with the X-direction and Y-direction rail surfaces of the column guide rail. The first chain connector is disposed on the chain mounting seat and is used to connect to one end of the chain.

[0018] In one embodiment, the lifting pallet further includes a limiting seat, the high-positioning unit is disposed at the third end of the pallet along the second direction, and the limiting seat is disposed at the fourth end of the pallet along the second direction, with the limiting seat and the high-positioning unit arranged at a distance from each other.

[0019] In one embodiment, the lifting and positioning unit includes a first positioning seat, a second positioning seat, a first cylinder, a first cylinder seat, and a first positioning pin. The first positioning seat is disposed on the column, the second positioning seat is disposed on the tray, the first cylinder seat is on one side of the first positioning seat, the first cylinder is disposed on the first cylinder seat and connected to the first positioning pin, and when the lifting tray rises to a high position, the first cylinder pushes the first positioning pin to extend into the second positioning seat.

[0020] In one embodiment, the lifting and positioning unit further includes at least two first rollers and at least two second rollers, the at least two first rollers being rotatably mounted in the first positioning seat at intervals, the at least two second rollers being rotatably mounted in the second positioning seat at intervals, and the first positioning pin being movably inserted between the at least two first rollers and the at least two second rollers.

[0021] In one embodiment, the high-positioning unit includes a second cylinder, a second cylinder seat, a second positioning pin, and a third positioning seat. The second cylinder seat is used to be installed on the upper conveyor line, and the third positioning seat is disposed on the pallet. The second cylinder is disposed on the second cylinder seat and connected to the second positioning pin. When the lifting pallet rises to the high position, the second cylinder drives the second positioning pin to extend and insert into the third positioning seat.

[0022] In one embodiment, the high-positioning unit further includes a guide seat and at least two third rollers. The guide seat is used to be installed on the upper conveyor line. The second positioning pin is slidably inserted into the guide seat. At least two of the third rollers are spaced apart in the third positioning seat. The end of the second positioning pin can be inserted between at least two of the third rollers.

[0023] In one embodiment, the counterweight unit includes a counterweight frame, a counterweight guide rail, a second chain joint, a counterweight block, and a counterweight roller. The counterweight guide rail is disposed on the inner side of the column, the second chain joint is disposed on the counterweight frame and connected to the other end of the chain, and the counterweight roller is disposed on the side of the counterweight frame via a seat, and the counterweight roller makes rolling contact with the X-direction rail surface and the Y-direction rail surface of the counterweight guide rail.

[0024] A buffer pad is provided at the bottom of the counterweight.

[0025] In one embodiment, multiple counterweights are provided, and each counterweight has recessed grooves on its opposite sides. The multiple counterweights are stacked along the height direction of the counterweight frame, and the grooves of adjacent counterweights are staggered in the circumferential direction in the horizontal plane.

[0026] In one embodiment, the lifting device further includes a low-position support unit for installation at the work site, and the low-position support unit is located below the lifting pallet. When the lifting pallet is lowered to the low position, the lifting pallet abuts against the low-position support unit.

[0027] A second aspect of this application also provides a conveying system comprising:

[0028] Lower conveyor line;

[0029] An upper conveyor line, wherein the upper conveyor lines are stacked at intervals above the lower conveyor line; and

[0030] Two lifting devices as described above, one of which is located at the feed end of the upper conveyor line and the discharge end of the lower conveyor line, and the other of which is located at the discharge end of the upper conveyor line and the feed end of the lower conveyor line. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the lifting device according to an embodiment of the present application, showing the lifting tray in a high position.

[0034] Figure 2 This is a schematic diagram of the lifting device when the lifting tray is in a low position.

[0035] Figure 3 This is a schematic diagram of the structure of the first column unit in one embodiment.

[0036] Figure 4 This is a schematic diagram of the structure of a driving unit according to one embodiment.

[0037] Figure 5 This is a schematic diagram of the structure of a lifting tray according to one embodiment.

[0038] Figure 6 This is a schematic diagram of the structure of a lifting and positioning unit according to one embodiment.

[0039] Figure 7 This is a schematic diagram of the structure in which the first positioning pin is inserted into the second positioning seat.

[0040] Figure 8 This is a schematic diagram of the structure of a high-positioning unit according to one embodiment.

[0041] Figure 9 This is a schematic diagram of the counterweight unit in one embodiment.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Lifting device; 10. Lifting pallet; 11. Pallet; 12. Roller seat; 13. Pallet roller; 14. Chain mounting seat; 15. First chain joint; 16. Limit seat; 20. Lifting and positioning unit; 21. First positioning seat; 22. Second positioning seat; 23. First cylinder; 24. First cylinder seat; 25. First positioning pin; 26. First roller; 27. Second roller; 30. First column unit; 31. Foot; 32. Support; 33. Column; 34. Column guide rail; 35. Buffer block; 40. Second column unit; 50. Drive unit; 51. Main shaft 52. Bearing housing; 53. Sprocket; 54. Chain; 55. Coupling; 56. Power source; 57. Locking gear; 58. Pin seat; 59. Stop pin; 59a. Automatic oiler; 60. Counterweight unit; 61. Counterweight frame; 62. Counterweight guide rail; 63. Second chain joint; 64. Counterweight block; 641. Groove; 65. Counterweight roller; 66. Buffer pad; 70. High-position positioning unit; 71. Second cylinder; 72. Second cylinder seat; 73. Second positioning pin; 74. Third positioning seat; 75. Guide seat; 76. Third roller; 80. Low-position support unit. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] This application provides a conveying system, specifically a double-layer conveying system, including a lower conveyor line, an upper conveyor line, and two lifting devices 100 as described above. The upper and lower conveyor lines have the same structure and working principle, and can specifically employ any one of the following: a belt conveyor mechanism, a sprocket conveyor mechanism, etc.

[0051] The upper conveyor lines are stacked on top of the lower conveyor lines at intervals; one lifting device 100 is located at the feed end of the upper conveyor line and the discharge end of the lower conveyor line, and the other lifting device 100 is located at the discharge end of the upper conveyor line and the feed end of the lower conveyor line.

[0052] The direct transport objects of the upper and lower conveyor lines are conveyor trolleys. The feed end of the upper conveyor line and the discharge end of the lower conveyor line are arranged corresponding to the loading station. That is, after the conveyor trolley receives the workpiece in the loading station, it enters the upper conveyor line from the feed end, and the upper conveyor line then transports the conveyor trolley and the workpiece to the target station.

[0053] The discharge end of the upper conveyor line and the feed end of the lower conveyor line are arranged to correspond to the target workstation. When the conveyor trolley carrying the workpiece arrives at the discharge end of the upper conveyor line, it means that the conveyor trolley has reached the target workstation and the workpiece can be picked up by the picking robot. Then, the empty conveyor trolley enters the lifting device 100 and descends to the feed end of the lower conveyor line and enters the lower conveyor line. Immediately afterwards, the lower conveyor line transports the empty conveyor trolley to the discharge end of the lower conveyor line, which is the return to the loading workstation. After the new workpiece is placed on the conveyor trolley, the lifting device 100 raises the conveyor trolley and workpiece to the feed end of the upper conveyor line to realize continuous loading and meet the continuous operation of the conveying system.

[0054] See Figure 1 The following is an embodiment of a lifting device 100, which includes a lifting tray 10, a lifting positioning unit 20, a first column unit 30, a second column unit 40, a drive unit 50, a counterweight unit 60, and a high-position positioning unit 70.

[0055] The lifting pallet 10 has a first end and a second end arranged opposite to each other in a first direction; a lifting positioning unit 20 is disposed at the first end and the second end; a first column unit 30 is disposed on the opposite side of the first end, and a second column unit 40 is disposed on the opposite side of the second end, and when the lifting pallet 10 is in a high position, the lifting positioning unit 20 is used to position and cooperate with the first column unit 30 and the second column unit 40; a drive unit 50 is disposed on the first column unit 30 and the second column unit 40; a counterweight unit 60 is movably and vertically disposed on the first column unit 30 and the second column unit 40, and the counterweight unit 60 is connected to the lifting pallet 10 through the drive unit 50; the lifting pallet 10 also has a third end in a second direction, a high-positioning unit 70 is disposed at the third end, and when the lifting pallet 10 is in a high position, the high-positioning unit 70 is used to position and cooperate with the upper conveyor line.

[0056] For example, the first direction mentioned above can be the X-axis direction, and the second direction can be the Y-axis direction.

[0057] In summary, implementing the technical solution of this embodiment will have the following beneficial effects: In the lifting device 100 of this solution, by simultaneously arranging a first column unit 30 and a second column unit 40 on both sides of the lifting pallet 10 in the first direction, and installing a drive unit 50 on both the first column unit 30 and the second column unit 40, the lifting pallet 10 is connected to the counterweight unit 60 arranged in the first column unit 30 and the second column unit 40 through the drive unit 50. On the one hand, the counterweight unit 60 can form a force balance relationship with the lifting pallet 10, ensuring the stable installation of the lifting pallet 10. On the other hand, when the two drive units 50 output driving force synchronously, they can synchronously output power to the lifting pallet 10 from both sides in the first direction, thereby driving the lifting pallet 10 to rise quickly and smoothly from a low position to a high position, improving the operation of the lifting pallet 10. The high speed of movement helps ensure production cycle and processing efficiency. Furthermore, the lifting pallet 10 is supported by the first column unit 30 and the second column unit 40 on both sides 32, and is not limited by the limited force of the cantilever, thus avoiding fatigue bending deformation of the lifting pallet 10. When the lifting pallet 10 reaches the high position, the lifting positioning unit 20 and the high position positioning unit 70 can act sequentially or simultaneously. The lifting positioning unit 20 is connected to the corresponding first column unit 30 and second column unit 40 to achieve positioning, and the high position positioning unit 70 is connected to the upper conveyor line to achieve positioning. This can form a multi-directional positioning effect for the lifting pallet 10, greatly improving the positioning accuracy of the lifting pallet 10 and helping to ensure the normal and safe flow of the conveyor trolley on the lifting pallet 10 between the upper and lower conveyor lines.

[0058] Please continue reading. Figure 3 In one embodiment, both the first column unit 30 and the second column unit 40 include a foot 31, a support 32, a column 33, a column guide rail 34, and a buffer block 35. The foot 31 is disposed at the bottom of the column 33, and the support 32 is disposed on the side of the column 33. The column 33 is used to be installed on the work site by means of the foot 31 and the support 32. The column guide rail 34 is disposed along the height direction of the column 33 on the side of the column 33 facing the lifting pallet 10, and the column guide rail 34 moves and cooperates with the lifting pallet 10. The buffer block 35 is disposed at the top of the column 33 and flexibly abuts against the lifting pallet 10 when it is raised to a high position.

[0059] Specifically, both the anchor 31 and the support 32 are bolted to the ground of the work site. The anchor 31 is fixed to the bottom of the column 33, and the support 32 is arranged at an angle, thereby further forming an oblique support 32 for the column 33, which can better ensure the stable installation and high strength of the column 33. Preferably, there are two supports 32, which are installed obliquely on opposite sides of the column 33, thereby forming a double-sided oblique support for the column 33 and improving the stability of the support.

[0060] The column guide rail 34 is installed on the column 33 and can guide and limit the movement of the lifting pallet 10, ensuring the smooth lifting of the lifting pallet 10. When the lifting pallet 10 rises to the high position, the lifting pallet 10 comes into contact with the buffer block 35. The buffer block 35 buffers the lifting pallet 10, preventing a rigid collision between the lifting pallet 10 and the column 33, and avoiding noise and deformation damage.

[0061] Optionally, the buffer block 35 may be made of rubber or other soft or elastic components.

[0062] Please continue reading. Figure 4 In another embodiment, the drive unit 50 includes a main shaft 51, a bearing housing 52, a sprocket 53, a chain 54, a coupling 55, and a power source 56. The main shaft 51 is rotatably mounted on the top of the column 33 via the bearing housing 52, and the main shaft 51 is drivenly connected to the power source 56 via the coupling 55. The sprocket 53 is sleeved on the main shaft 51 and can rotate synchronously with the main shaft 51. The chain 54 is wrapped around the outside of the sprocket 53, and one end of the chain 54 is connected to the lifting tray 10, and the other end of the chain 54 is connected to the counterweight unit 60.

[0063] During operation, the power source 56 drives the main shaft 51 to rotate clockwise via the coupling 55, which in turn drives the sprocket 53 to rotate clockwise synchronously. This, in turn, drives the chain 54 to rotate clockwise, causing the counterweight unit 60 connected to one end of the chain 54 to descend, while the lifting pallet 10 connected to the other end of the chain 54 rises steadily. Conversely, the lifting pallet 10 descends, thus enabling the lifting pallet 10 to move the conveyor trolley between the upper and lower conveyor lines, meeting the need for the conveyor trolley to move between different conveyor lines. The use of sprocket 53 and chain 54 to mesh and transmit power provides a stable transmission ratio and strong load-bearing capacity, helping to ensure that the lifting driving force is transmitted more smoothly to the lifting pallet 10, resulting in stable posture and high movement accuracy during lifting and lowering operations.

[0064] Please continue reading. Figure 4 Furthermore, based on the above embodiments, the drive unit 50 also includes a locking gear 57, a pin seat 58, and a stop pin 59. The locking gear 57 is fixedly mounted on the main shaft 51, the pin seat 58 is located at the top of the column 33, and the pin seat 58 has a socket hole axially aligned with the tooth groove of the locking gear 57. The stop pin 59 is detachably mounted on the pin seat 58. When maintenance work is required on the lifting device 100, the stop pin 59 is removed so that it passes through the socket hole and is inserted into the tooth groove of the locking gear 57. This prevents accidental operation of the lifting device 100 from causing personal injury to maintenance personnel, and the installation of the stop pin 59 is convenient, quick, and labor-saving, with strong feasibility.

[0065] Furthermore, the drive unit 50 also includes an automatic oiler 59a, which is located at the top of the column 33 and has its nozzle facing the sprocket 53 and chain 54. This allows the automatic oiler to periodically spray lubricating oil onto the sprocket 53 and chain 54, ensuring that the sprocket 53 and chain 54 are in good working condition and reducing wear.

[0066] Please continue reading. Figure 5 In addition, in one embodiment, the lifting pallet 10 includes a pallet 11, a roller seat 12, a pallet roller 13, a chain mounting seat 14, and a first chain 54 connector. The roller seat 12 and the chain mounting seat 14 are both mounted on the first end and the second end of the pallet 11 along the first direction. The pallet roller 13 is rotatably disposed on the roller seat 12 and rolls in contact with the X-direction rail surface and the Y-direction rail surface of the column guide rail 34. The first chain 54 connector is disposed on the chain mounting seat 14 and is used to connect to one end of the chain 54.

[0067] In this application, the pallet 11 is a disc structure with multiple hollow holes in the middle, formed by welding or assembling multiple metal components. This structure has high strength, simple construction, and helps reduce manufacturing costs. Roller seats 12 and pallet rollers 13 are installed on the pallet 11, and the pallet rollers 13 roll in contact with the X-axis and Y-axis rail surfaces of the column guide rail 34. This restricts the movement freedom of the lifting pallet 10 in the X-axis and Y-axis directions, ensuring stable lifting and lowering operation and high positional accuracy. The pallet 10 is connected to the chain 54 via the first chain joint, allowing it to be driven by the chain 54 to move up and down in the height direction (i.e., the Z-axis direction).

[0068] Furthermore, the lifting pallet 10 also includes a limiting seat 16. The high-positioning unit 70 is disposed at the third end of the pallet 11 along the second direction, and the limiting seat 16 is disposed at the fourth end of the pallet 11 along the second direction. The limiting seat 16 and the high-positioning unit 70 are arranged opposite each other at a distance. Specifically, two limiting seats 16 are provided, arranged side by side at a distance at the fourth end. On the one hand, the limiting seat 16 can abut against the side of the conveyor trolley placed on the lifting pallet 10 to achieve positioning of the conveyor trolley; on the other hand, when the lifting pallet 10 rises to the high position, the limiting seat 16 can also abut against the upper conveyor line to achieve physical limitation on the rising position of the lifting pallet 10 and improve the positioning accuracy of the lifting pallet 10.

[0069] Of course, in other alternative embodiments, the rising position of the lifting tray 10 can also be detected and positioned by setting an upward limit position sensor.

[0070] Please continue reading. Figure 6 and Figure 7In one embodiment, the lifting and positioning unit 20 includes a first positioning seat 21, a second positioning seat 22, a first cylinder 23, a first cylinder seat 24, and a first positioning pin 25. The first positioning seat 21 is disposed on the column 33, the second positioning seat 22 is disposed on the tray 11, the first cylinder seat 24 is on one side of the first positioning seat 21, the first cylinder 23 is disposed on the first cylinder seat 24 and connected to the first positioning pin 25. When the lifting tray 10 rises to the high position, the first cylinder 23 pushes the first positioning pin 25 to extend into the second positioning seat 22.

[0071] During normal lifting and lowering operation of the lifting pallet 10, the piston rod of the first cylinder 23 remains in the retracted state, meaning that the first positioning pin 25 remains in the retracted position to avoid contact and interference with the second positioning seat 22. When the lifting pallet 10 rises to the high position, the first positioning pin 25 is precisely aligned laterally with the inner cavity of the second positioning seat 22. Controlling the piston rod of the first cylinder 23 to extend, the piston rod pushes the first positioning pin 25 into the second positioning seat 22, thereby forming a locking effect. This ensures that the lifting pallet 10 is firmly and stably stopped at the high position through the positioning unit 20, the first column unit 30, and the second column unit 40.

[0072] Furthermore, the lifting and positioning unit 20 also includes at least two first rollers 26 and at least two second rollers 27. The at least two first rollers 26 are rotatably mounted in the first positioning seat 21 at intervals, and the at least two second rollers 27 are rotatably mounted in the second positioning seat 22 at intervals. The first positioning pin 25 is movably inserted between the at least two first rollers 26 and the at least two second rollers 27. The at least two first rollers 26 mounted in the first positioning seat 21 are respectively arranged on opposite sides of the first positioning pin 25. The first rollers 26 respectively roll in contact with the opposite sides of the first positioning pin 25, which can limit and guide the extension and retraction movement of the first positioning pin 25, preventing the first positioning pin 25 from swaying and failing to be smoothly inserted into the second positioning seat 22. At least two second rollers 27 installed in the second positioning seat 22 are respectively arranged on opposite sides of the moving path of the first positioning pin 25 extending into the second positioning seat 22. As the first positioning pin 25 extends and moves and contacts the second rollers 27 on both sides, the second rollers 27 rotate under the action of friction, thereby guiding the first positioning pin 25 into the second positioning seat 22. Even if the first positioning pin 25 has a certain alignment deviation due to wobble or deformation, the rotation of the second rollers 27 can also correct the deviation of the first positioning pin 25, ensuring that the first positioning pin 25 can be effectively inserted into the second positioning seat 22.

[0073] Preferably, the first roller 26 and the second roller 27 are made of rubber, which can reduce friction and wear on the first positioning pin 25 and avoid rigid collision with the first positioning pin 25 to avoid excessive noise.

[0074] Please continue reading. Figure 8 In another embodiment, the high-positioning unit 70 includes a second cylinder 71, a second cylinder seat 72, a second positioning pin 73, and a third positioning seat 74. The second cylinder seat 72 is mounted on the upper conveyor line, and the third positioning seat 74 is disposed on the pallet 11. The second cylinder 71 is mounted on the second cylinder seat 72 and connected to the second positioning pin 73. When the lifting pallet 10 rises to the high position, the second cylinder 71 drives the second positioning pin 73 to extend and insert into the third positioning seat 74. Similarly, during the normal lifting and lowering operation of the lifting pallet 10, the second cylinder 71 drives the second positioning pin 73 to remain in the retracted position, thereby avoiding collision and interference with the third positioning seat 74. When the lifting pallet 10 rises to the high position, the second positioning pin 73 and the inner cavity of the third positioning seat 74 are laterally aligned. The second cylinder 71 pushes the second positioning pin 73 to extend, so that the second positioning pin 73 is inserted into the third positioning seat 74, thereby realizing the connection and positioning of the lifting pallet 10 with the upper conveyor line, further ensuring the positioning accuracy of the lifting pallet 11 and the structural strength when stopped at the high position.

[0075] Furthermore, the high-positioning unit 70 also includes a guide seat 75 and at least two third rollers 76. The guide seat 75 is used to install on the upper conveyor line. The second positioning pin 73 is slidably inserted into the guide seat 75. The at least two third rollers 76 are spaced apart in the third positioning seat 74, and the end of the second positioning pin 73 can be inserted between the at least two third rollers 76. It is understood that the guide seat 75 has a through hole, and the second positioning pin 73 passes through the through hole and can slide back and forth along the axial direction of the through hole, so that the guide seat 75 guides the second positioning pin 73 and improves its rigidity. The rolling contact between the third rollers 76 in the third positioning seat 74 and the end of the second positioning pin 73 not only reduces friction and wear, but the rolling of the third rollers 76 also guides the second positioning pin 73, ensuring that the second positioning pin 73 can be inserted more accurately into the third positioning seat 74.

[0076] Preferably, the third roller 76 is made of rubber. The rubber roller has less rigid impact and frictional wear on the second positioning pin 73, which helps to prevent excessive noise and improve the service life of the component.

[0077] Please continue reading. Figure 2Furthermore, based on any of the above embodiments, the lifting device 100 also includes a low-position support unit 80. The low-position support unit 80 is installed at the work site and is located below the lifting pallet 10. When the lifting pallet 10 descends to the low position, the lifting pallet 10 abuts against the low-position support unit 80. That is, the low-position support unit 80 can form a buffer support 32 for the lifting pallet 10 as it descends to the low position, preventing the lifting pallet 10 from rigidly impacting the work site and causing deformation damage or excessive noise.

[0078] For example, the low-position support unit 80 can be made of at least one of the following: 32 spring supports, 32 telescopic rod supports, 32 airbag supports, etc. The specific choice can be made flexibly according to actual needs.

[0079] It is necessary to clarify that the "high position" mentioned in this case specifically refers to the highest position that the lifting pallet 10 can reach. When the lifting pallet 10 reaches the high position, it can precisely connect with the upper conveyor line, allowing the conveyor trolley to move from the lifting pallet 10 onto the upper conveyor line. Conversely, the "low position" mentioned in this case specifically refers to the lowest position that the lifting pallet 10 can descend to. When the lifting pallet 10 reaches the low position, it can precisely connect with the lower conveyor line, allowing the conveyor trolley to move from the lifting pallet 10 onto the lower conveyor line.

[0080] Please continue reading. Figure 9 In one embodiment, the counterweight unit 60 includes a counterweight frame 61, a counterweight guide rail 62, a second chain 54 connector, a counterweight block 64, and a counterweight roller 65. The counterweight guide rail 62 is disposed on the inner side of the column 33. The second chain 54 connector is disposed on the counterweight frame 61 and connected to the other end of the chain 54. The counterweight roller 65 is disposed on the side of the counterweight frame 61 via a seat, and the counterweight roller 65 rolls in contact with the X-axis and Y-axis rail surfaces of the counterweight guide rail 62. A buffer pad 66 is disposed at the bottom of the counterweight block 64. By means of the rolling contact between the counterweight roller 65 and the X-axis and Y-axis rail surfaces of the counterweight guide rail 62, the position of the counterweight block 64 in the X-axis and Y-axis directions can be limited, so that the position and posture of the counterweight frame 61 and the counterweight block 64 are stable during the lifting and lowering operation. The second chain 54 connector is convenient to connect to the end of the chain 54 away from the lifting pallet 10. On the one hand, the chain 54 enables the counterweight unit 60 and the lifting pallet 10 to form a force balance relationship. On the other hand, when the power unit outputs driving force, the chain 54 can drive one of the lifting pallet 10 and the counterweight unit 60 to move upward while the other moves downward simultaneously.

[0081] The buffer pad 66 arranged at the bottom of the counterweight 64 serves as a buffer support 32 for the counterweight 64 when it descends to the extreme position.

[0082] Furthermore, multiple counterweights 64 are provided, and each counterweight 64 has a recessed groove 641 on both sides. The multiple counterweights 64 are stacked along the height direction of the counterweight frame 61, and the grooves 641 of two adjacent counterweights 64 are staggered in the circumferential direction in the horizontal plane.

[0083] On the one hand, compared to using a single large and heavy counterweight 64, this application uses multiple smaller and lighter counterweights 64 stacked together. This not only makes it easier to install and remove the counterweights 64, but also allows for flexible adjustment of the number of counterweights 64 used according to the weight of the lifting pallet 10, so that the appropriate counterweights 64 and the lifting pallets 10 of different weights can form a force balance relationship. On the other hand, the counterweights 64 are rectangular, and the sides of two adjacent counterweights 64 with grooves 641 are staggered in the circumferential direction. The grooves 641 make it easier for people to reach in and lift the counterweights 64, reducing the difficulty of installing and removing the counterweights 64.

[0084] For example, the heavy block 64 can be any one of metal blocks, stone blocks, or at least a combination of two or more of them, and the specific choice can be made flexibly according to the actual needs.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lifting device, characterized in that include: A lifting pallet having a first end and a second end that are arranged opposite to each other in a first direction; A lifting and positioning unit is disposed at the first end and the second end; A first column unit and a second column unit, wherein the first column unit is disposed on the opposite side of the first end and the second column unit is disposed on the opposite side of the second end, and when the lifting pallet is in a high position, the lifting positioning unit is used to position and cooperate with the first column unit and the second column unit. A drive unit is disposed on the first column unit and the second column unit; A counterweight unit is provided, which is movably and vertically disposed on the first column unit and the second column unit, and the counterweight unit is connected to the lifting tray through the drive unit; as well as The high-positioning unit, wherein the lifting pallet also has a third end in the second direction, the high-positioning unit is disposed at the third end, and when the lifting pallet is in a high position, the high-positioning unit is used to position and cooperate with the upper conveyor line.

2. The lift device of claim 1, wherein, Both the first column unit and the second column unit include a base, a support, a column, a column guide rail, and a buffer block. The base is located at the bottom of the column, and the support is located on the side of the column. The column is used to be installed on the work site via the base and the support. The column guide rail is located along the height direction of the column on the side of the column facing the lifting pallet, and the column guide rail moves in cooperation with the lifting pallet. The buffer block is located at the top of the column and flexibly abuts against the lifting pallet when it is raised to the high position.

3. The lift device of claim 2, wherein, The drive unit includes a main shaft, a bearing housing, a sprocket, a chain, a coupling, and a power source. The main shaft is rotatably mounted on the top of the column via the bearing housing, and the main shaft is driven by the power source via the coupling. The sprocket is sleeved on the main shaft and can rotate synchronously with the main shaft. The chain is wound around the outside of the sprocket, and one end of the chain is connected to the lifting pallet, while the other end of the chain is connected to the counterweight unit.

4. The lift device of claim 3, wherein, The drive unit also includes a locking gear, a pin seat, and a stop pin. The locking gear is fixedly mounted on the main shaft, the pin seat is located at the top of the column, and the pin seat has a hole that axially aligns with the tooth groove of the locking gear. The stop pin is detachably mounted on the pin seat. When maintenance is required on the lifting device, the stop pin is removed so that it passes through the hole and is inserted into the tooth groove of the locking gear.

5. The lifting device according to claim 3, characterized in that, The lifting pallet includes a pallet, a roller seat, pallet rollers, a chain mounting seat, and a first chain connector. The roller seat and the chain mounting seat are both mounted on the first end and the second end of the pallet along a first direction. The pallet rollers are rotatably mounted on the roller seat and roll in contact with the X-direction and Y-direction rail surfaces of the column guide rail. The first chain connector is mounted on the chain mounting seat and is used to connect to one end of the chain.

6. The lifting device according to claim 5, characterized in that, The lifting pallet also includes a limiting seat. The high-positioning unit is located at the third end of the pallet along the second direction, and the limiting seat is located at the fourth end of the pallet along the second direction. The limiting seat and the high-positioning unit are arranged opposite each other at a distance.

7. The lifting device according to claim 5, characterized in that, The lifting and positioning unit includes a first positioning seat, a second positioning seat, a first cylinder, a first cylinder seat, and a first positioning pin. The first positioning seat is disposed on the column, the second positioning seat is disposed on the tray, the first cylinder seat is on one side of the first positioning seat, the first cylinder is disposed on the first cylinder seat and connected to the first positioning pin, when the lifting tray rises to the high position, the first cylinder pushes the first positioning pin to extend into the second positioning seat.

8. The lifting device according to claim 7, characterized in that, The lifting and positioning unit further includes at least two first rollers and at least two second rollers. The at least two first rollers are rotatably mounted in the first positioning seat at intervals, and the at least two second rollers are rotatably mounted in the second positioning seat at intervals. The first positioning pin is movably inserted between the at least two first rollers and the at least two second rollers.

9. The lifting device according to claim 5, characterized in that, The high-positioning unit includes a second cylinder, a second cylinder seat, a second positioning pin, and a third positioning seat. The second cylinder seat is used to install on the upper conveyor line. The third positioning seat is disposed on the pallet. The second cylinder is disposed on the second cylinder seat and connected to the second positioning pin. When the lifting pallet rises to the high position, the second cylinder drives the second positioning pin to extend and insert into the third positioning seat.

10. The lifting device according to claim 9, characterized in that, The high-positioning unit also includes a guide seat and at least two third rollers. The guide seat is used to be installed on the upper conveyor line. The second positioning pin is slidably inserted into the guide seat. At least two of the third rollers are spaced apart in the third positioning seat. The end of the second positioning pin can be inserted between at least two of the third rollers.

11. The lifting device according to claim 3, characterized in that, The counterweight unit includes a counterweight frame, a counterweight guide rail, a second chain joint, a counterweight block, and a counterweight roller. The counterweight guide rail is disposed on the inner side of the column. The second chain joint is disposed on the counterweight frame and connected to the other end of the chain. The counterweight roller is disposed on the side of the counterweight frame through a seat body, and the counterweight roller makes rolling contact with the X-axis and Y-axis rail surfaces of the counterweight guide rail. A buffer pad is provided at the bottom of the counterweight.

12. The lifting device according to claim 11, characterized in that, The counterweight is provided in multiple pieces, and each counterweight has a groove formed on its opposite sides. The multiple counterweights are stacked along the height direction of the counterweight frame, and the grooves of two adjacent counterweights are staggered in the circumferential direction in the horizontal plane.

13. The lifting device according to claim 1, characterized in that, The lifting device also includes a low-position support unit, which is installed at the work site and is located below the lifting pallet. When the lifting pallet is lowered to the low position, the lifting pallet abuts against the low-position support unit.

14. A conveying system, characterized in that, include: Lower conveyor line; An upper conveyor line is stacked on top of a lower conveyor line at intervals. as well as Two lifting devices as described in any one of claims 1 to 13, wherein one of the lifting devices is disposed at the feed end of the upper conveyor line and the discharge end of the lower conveyor line, and the other lifting device is disposed at the discharge end of the upper conveyor line and the feed end of the lower conveyor line.

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