Lifting device for solving unbalance loading of large platform

Abstract

The utility model relates to the technical field of lifting platforms, and discloses a lifting device for solving unbalance loading of a large platform, the lifting device comprises a lifting platform, a connecting cross beam, a lifting cross beam and a telescopic driving piece, and at least four stand columns are arranged and are located on the two opposite sides of the lifting platform respectively; the number of the connecting cross beams is two, and each connecting cross beam is connected with the multiple stand columns located on one side of the lifting platform. The number of the lifting cross beams is two, each lifting cross beam is connected to the corresponding stand column in a sliding mode and located above the lifting platform and the connecting cross beam, the two ends of each lifting cross beam are each rotationally connected with a chain wheel, the chain wheels located at the two ends of the same lifting cross beam are in transmission connection through a linkage shaft, and each chain wheel is connected with a chain in an engaged mode. Two ends of each chain are respectively connected to the connecting cross beam and the lifting platform; the at least two telescopic driving parts are located on the two opposite sides of the lifting platform correspondingly and used for driving the corresponding lifting cross beams to ascend and descend.

Description

Technical Field

[0001] The present application belongs to the technical field of lifting platforms, and specifically relates to a lifting device for solving the problem of overloading of a large platform. Background Art

[0002] With the development of technology, lifting devices have gradually come into being. They can transport goods and vehicles between upper and lower floors, and are therefore widely used in construction sites, factories, parking lots and other places.

[0003] At present, the lifting device includes at least four columns, a lifting platform and a hydraulic cylinder for driving the lifting platform to lift and lower. The four columns are respectively arranged on both sides of the lifting platform, the lifting platform is slidably connected to the columns, and the hydraulic cylinders are respectively arranged on both sides of the lifting platform, so that when the hydraulic cylinders perform telescopic movements, the lifting platform can perform lifting and lowering movements along the length direction of the columns under the action of the hydraulic cylinders; however, due to the large area of ​​the lifting platform and when transporting goods, the goods may be placed in a non-center position of the lifting platform, which will result in uneven force on the lifting platform, which may cause the lifting platform to be skewed, thereby affecting the safety of cargo transportation, and at the same time resulting in higher requirements for the placement of the goods, increasing the difficulty of using the lifting device to transport goods. Utility Model Content

[0004] The present application provides a lifting device for solving the problem of overloading on a large platform, so as to meet the requirements for placing cargo, improve the safety of cargo transportation and reduce the difficulty of cargo transportation.

[0005] The technical solution adopted in this application is:

[0006] A lifting device for solving the problem of overloading of a large platform, comprising:

[0007] Lifting platform;

[0008] At least four columns are provided and are respectively located on two opposite sides of the lifting platform;

[0009] Two connecting beams are provided and are respectively located on two opposite sides of the lifting platform, and each connecting beam is connected to a plurality of columns located on one side of the lifting platform;

[0010] A lifting beam, which is provided with two and is respectively located on opposite sides of the lifting platform, and each of the lifting beams is slidably connected to the corresponding column and is located above the lifting platform and the connecting beam, and both ends of each lifting beam are rotatably connected to a sprocket, and the sprockets located at both ends of the same lifting beam are connected through a linkage shaft transmission, and each sprocket is meshed and connected with a chain, and the two ends of each chain are respectively connected to the connecting beam and the lifting platform;

[0011] At least two telescopic driving members are provided and are respectively located on two opposite sides of the lifting platform. The telescopic driving members are used to drive the corresponding lifting beam to rise and fall.

[0012] By adopting the above technical scheme, when using the lifting device in the present application, the goods are first placed on the lifting platform, and then the telescopic driving component is started, and then the telescopic driving component drives the lifting beam. The lifting beam performs lifting movement under the guidance of the column, so that the sprocket follows the lifting beam to perform lifting movement, and because the two ends of the chain are respectively connected to the connecting beam and the lifting platform, when the sprocket follows the lifting beam to perform lifting movement, the chain and the sprocket move relative to each other, so that the lifting platform follows the lifting beam to perform lifting movement under the action of the chain, so as to realize the transportation of goods.

[0013] Since the sprockets at both ends of the same lifting beam are connected through a linkage shaft transmission, the sprockets at both ends of the same lifting beam can rotate synchronously under the action of the linkage shaft, so that the chains corresponding to the same lifting beam can move synchronously, thereby making the lifting platform rise and fall smoothly, and avoiding the lifting platform from tilting during the lifting process due to the placement of the goods not being in the center position of the lifting platform, thereby greatly increasing the safety of the lifting platform; at the same time, it greatly reduces the requirements for the placement of goods, so as to greatly reduce the difficulty of moving goods using the lifting device in the present application, thereby improving the user experience.

[0014] Optionally, the sprocket and the linkage shaft are located on the top of the lifting beam, and the sprocket is located on a side of the telescopic drive member close to the column.

[0015] By adopting the above technical solution, since the sprocket is located on the side of the telescopic drive member close to the column, the position of the sprocket is closer to the end of the lifting platform, so as to further reduce the occurrence of the lifting platform being tilted due to the non-central placement of the goods, thereby further improving the balance of the lifting platform and further increasing the safety of the lifting device. Since the sprocket and the linkage shaft are located at the top of the lifting beam, the linkage shaft can avoid the telescopic drive member to ensure that the sprockets at both ends of the lifting beam can rotate synchronously, so as to further ensure the safety of the lifting device.

[0016] Optionally, the sprocket includes a first wheel body and a second wheel body spaced apart from the first wheel body, and the chain includes a first chain body meshingly connected to the first wheel body and a second chain body meshingly connected to the second wheel body.

[0017] By adopting the above technical solution, since the chain includes the first chain body and the second chain body, the structural strength of the chain is increased to ensure the service life of the lifting device and further increase the safety of the lifting device.

[0018] Optionally, the sprocket further includes a connecting tube located between the first wheel body and the second wheel body, two ends of the connecting tube are respectively fixedly connected to the first wheel body and the second wheel body, and the connecting tube is sleeved on the linkage shaft.

[0019] By adopting the above technical solution, since the two ends of the connecting tube are respectively fixedly connected to the first wheel body and the second wheel body, the first wheel body and the second wheel body are connected as a whole, so as to facilitate the installation of the sprocket on the linkage shaft, thereby improving the assembly efficiency of the lifting device; at the same time, the first wheel body and the second wheel body can maintain synchronous rotation under the action of the connecting tube, so as to greatly reduce the difficulty of maintaining synchronous rotation of the sprockets located at the two ends of the lifting beam.

[0020] Optionally, connecting parts are provided at both ends of the first chain body and the second chain body, and the connecting parts include a main body, an adjusting column provided at the end of the main body, and an adjusting nut threadedly connected to the adjusting column, the main body is provided with a connecting pin passing through the ends of the first chain body and the second chain body, the connecting beam and the lifting platform are both provided with fixing parts, the adjusting column passes through the fixing parts, and the adjusting nut abuts against a side of the fixing parts away from the main body.

[0021] By adopting the above technical solution, when installing the chain, the connecting piece at one end of the chain is first fixedly connected to the corresponding fixing piece so that the adjusting nut is located on the side of the fixing piece away from the main body, and then the other end of the chain is passed around the sprocket and fixedly connected to another fixing piece to complete the installation of the chain. During this process, it is only necessary to twist the adjusting nut, thereby greatly reducing the difficulty of installing the chain.

[0022] Since the connecting member in the present application includes a main body, an adjusting column and an adjusting nut, after the chain is installed and connected to the crossbeam and the lifting beam, the chain can be adjusted by adjusting the adjusting nut to ensure the driving efficiency of the lifting platform.

[0023] Optionally, the fixing member has a center hole, and a threaded protection tube is provided on the side of the adjusting nut close to the main body and is sleeved on the outside of the adjusting column. The outer diameter of the threaded protection tube is smaller than the aperture of the center hole, and the outer diameter of the adjusting nut is larger than the aperture of the center hole.

[0024] By adopting the above technical solution, since the outer diameter of the thread protection tube is smaller than the aperture of the center hole, after the connecting piece is installed on the fixing piece, the thread protection tube can extend into the center hole, so that the thread protection tube can protect the threads on the adjusting column, thereby avoiding the situation where the threads on the adjusting column are damaged due to relative shaking between the adjusting column and the fixing piece.

[0025] Optionally, bearing seats fixedly connected to the lifting beam are provided on both sides of each sprocket, and the linkage shaft passes through the bearing seats.

[0026] By adopting the above technical solution, since bearing seats fixedly connected to the lifting beam are provided on both sides of each sprocket, the bearing seats support the linkage shaft to ensure the structural strength of the linkage shaft and avoid bending of the linkage shaft due to the pressure of the sprocket, thereby ensuring the service life of the linkage shaft and ensuring the smooth lifting and lowering of the lifting platform.

[0027] Optionally, the linkage shaft is provided with a limiting portion located on the inner side of the bearing seat, and the limiting portion can cooperate with the bearing seat to stop the linkage shaft in the axial direction.

[0028] By adopting the above technical solution, since the limiting part can cooperate with the bearing seat to stop the linkage shaft in the axial direction, the limiting part and the stop of the bearing seat can limit the axial movement of the linkage shaft, so as to increase the stability of the linkage shaft, and at the same time avoid the situation where the lifting platform is subjected to horizontal deflection force due to the displacement of the linkage shaft in the axial direction, thereby further ensuring the smooth lifting of the lifting platform.

[0029] Optionally, a plane bearing is provided between the limiting portion and the bearing seat, so that the limiting portion cooperates with the bearing seat stopper in the axial direction of the linkage shaft through the plane bearing.

[0030] By adopting the above technical solution, since the limiting part cooperates with the bearing seat stop in the axial direction of the linkage shaft through the plane bearing, the friction between the limiting part and the bearing seat is reduced. On the one hand, the service life of the limiting part is guaranteed, and on the other hand, the noise during the operation of the lifting device is reduced, thereby improving the user experience.

[0031] Optionally, the lifting beam is fixedly connected to a support tube, and the bearing seat is arranged on the support tube to increase the distance between the linkage shaft and the lifting beam.

[0032] By adopting the above technical solution, since the bearing seat is arranged on the support tube, the distance between the linkage shaft and the lifting beam is increased, so that the space between the linkage shaft and the lifting beam can accommodate the sprocket, thereby avoiding the situation of setting other components on the lifting beam, and at the same time, it can also achieve the effect of facilitating the fixing of the bearing seat.

[0033] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0034] 1. The lifting device in the present application includes a lifting platform, a connecting beam, a lifting beam and a telescopic driving member, at least four columns are provided and are respectively located on opposite sides of the lifting platform; two connecting beams are provided, and each connecting beam is connected to multiple columns located on one side of the lifting platform; two lifting beams are provided, and each lifting beam is slidably connected to the corresponding column and is located above the lifting platform and the connecting beam, and both ends of each lifting beam are rotatably connected to a sprocket, and the sprockets at both ends of the same lifting beam are connected through a linkage shaft transmission, each sprocket is meshed and connected to a chain, and the two ends of each chain are respectively connected to the connecting beam and the lifting platform; the telescopic driving member to At least two are provided and are located on opposite sides of the lifting platform. The telescopic driving parts are used to drive the corresponding lifting beams to rise and fall, so that the sprockets located at both ends of the same lifting beam can rotate synchronously under the action of the linkage shaft, so that the chains corresponding to the same lifting beam can move synchronously, thereby making the lifting platform rise and fall smoothly, so as to avoid the lifting platform from tilting during the lifting process due to the placement of the goods not being in the center position of the lifting platform, thereby greatly increasing the safety of the lifting platform; at the same time, it greatly reduces the requirements for the placement of goods, so as to greatly reduce the difficulty of moving the goods using the lifting device in the present application, thereby improving the user experience.

[0035] 2. The sprocket and linkage shaft in the present application are located at the top of the lifting beam, so that the linkage shaft can avoid the telescopic drive member to ensure that the sprockets at both ends of the lifting beam can rotate synchronously, so as to further ensure the safety of the lifting device. The sprocket is located on the side of the telescopic drive member close to the column, so that the position of the sprocket is closer to the end of the lifting platform, so as to further reduce the occurrence of the lifting platform being tilted due to the non-centered placement of the goods, thereby further improving the balance of the lifting platform, so as to further increase the safety of the lifting device.

[0036] 3. The sprocket in the present application includes a first wheel body and a second wheel body spaced apart from the first wheel body, and the chain includes a first chain body meshingly connected to the first wheel body and a second chain body meshingly connected to the second wheel body, thereby increasing the structural strength of the chain to ensure the service life of the lifting device and further increase the safety of the lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0038] Figure 1 This is a schematic structural diagram of the lifting device described in one embodiment of the present application;

[0039] Figure 2 for Figure 1 A magnified view of the middle A area;

[0040] Figure 3 for Figure 1 Enlarged view of the B area;

[0041] Figure 4 This is a simplified diagram of the relationship between the connecting beam, sprocket, chain and lifting platform in one embodiment of the present application;

[0042] Figure 5 This is a structural schematic diagram of the lower linkage shaft and the sprocket in one implementation mode of the present application;

[0043] Figure 6 This is a schematic diagram of the structure of the connecting member according to one embodiment of the present application.

[0044] Reference numerals:

[0045] 1. Lifting platform; 2. Column; 3. Connecting beam; 4. Lifting beam; 41. Linking shaft; 411. Limiting part; 42. Bearing seat; 43. Support tube; 44. Pulley; 441. Wire rope; 5. Telescopic drive member; 6. Sprocket; 61. First wheel body; 62. Second wheel body; 63. Connecting pipe; 7. Chain; 71. First chain body; 72. Second chain body; 8. Connecting member; 81. Main body; 811. Connecting pin; 82. Adjusting column; 83. Adjusting nut; 831. Threaded protection tube; 9. Fixing member. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0048] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0051] Reference Figures 1 to 6, discloses a lifting device for solving the problem of overloading of a large platform, which includes a lifting platform 1, a column 2, a connecting beam 3, a lifting beam 4 and a telescopic drive member 5, wherein at least four columns 2 are provided and are respectively located on opposite sides of the lifting platform 1; two connecting beams 3 are provided and are respectively located on opposite sides of the lifting platform 1, and each connecting beam 3 is connected to multiple columns 2 located on one side of the lifting platform 1; two lifting beams 4 are provided and are respectively located on opposite sides of the lifting platform 1, and each lifting beam 4 is slidably connected to the corresponding column 2 and is located above the lifting platform 1 and the connecting beam 3, and both ends of each lifting beam 4 are rotatably connected to a sprocket 6, and the sprockets 6 located at both ends of the same lifting beam 4 are transmission-connected through a linkage shaft 41, and each sprocket 6 is meshedly connected to a chain 7, and the two ends of each chain 7 are respectively connected to the connecting beam 3 and the lifting platform 1; at least two telescopic drive members 5 are provided and are respectively located on opposite sides of the lifting platform 1, and the telescopic drive member 5 is used to drive the corresponding lifting beam 4 to rise and fall.

[0052] When using the lifting device in the present application, first place the goods on the lifting platform 1, and then start the telescopic driving member 5, and then the telescopic driving member 5 drives the lifting beam 4, and the lifting beam 4 moves up and down under the guidance of the column 2, so that the sprocket 6 follows the lifting beam 4 to perform the lifting movement, and because the two ends of the chain 7 are respectively connected to the connecting beam 3 and the lifting platform 1, when the sprocket 6 follows the lifting beam 4 to perform the lifting movement, the chain 7 and the sprocket 6 move relative to each other, so that the lifting platform 1 follows the lifting beam 4 to perform the lifting movement under the action of the chain 7, so as to realize the transportation of the goods.

[0053] Since the sprockets 6 at both ends of the same lifting beam 4 are connected by the linkage shaft 41, the sprockets 6 at both ends of the same lifting beam 4 can rotate synchronously under the action of the linkage shaft 41, so that the chains 7 corresponding to the same lifting beam 4 can move synchronously, thereby making the lifting platform 1 rise and fall smoothly, so as to avoid the lifting platform 1 from tilting during the lifting process due to the placement of the goods not being in the center position of the lifting platform 1, thereby greatly increasing the safety of the lifting platform 1; at the same time, it greatly reduces the requirements for the placement of goods, so as to greatly reduce the difficulty of moving goods using the lifting device in the present application, thereby improving the user experience.

[0054] The present application does not specifically limit the number of columns 2 and the number of telescopic drive members 5. Preferably, four columns 2 are provided and are respectively located on opposite sides of the lifting platform 1, that is, two of the columns 2 are provided on one side of the lifting platform 1, and the remaining two columns 2 are provided on the other side of the lifting platform 1; four telescopic drive members 5 are provided and are respectively provided on opposite sides of the lifting platform 1, that is, two of the telescopic drive members 5 are provided at intervals on one side of the lifting platform 1, and the remaining two telescopic drive members 5 are provided at intervals on the other side of the lifting platform 1, and the telescopic drive members 5 located on the same side of the lifting platform 1 are located between the two columns 2 on the same side. In other embodiments, the columns 2 may also be provided with six or other numbers, and the telescopic drive members 5 may also be provided with only two or six or other numbers.

[0055] The present application does not specifically limit the structure of the telescopic drive member 5. Preferably, refer to Figure 1 The driving member is a hydraulic cylinder, the piston rod of the hydraulic cylinder is hinged to the lifting beam 4 and the hinged position is located at the bottom of the lifting beam 4 to increase the driving effect of the lifting beam 4 and increase the stability of the lifting beam 4. In other embodiments, the driving member can also be a structure in which a cylinder and a driving motor cooperate with a reciprocating screw pair.

[0056] The present application does not make any specific limitation on the manner in which the lifting beam 4 and the column 2 are slidably connected. Preferably, the column 2 has a sliding groove extending along its length, and the end of the lifting beam 4 is provided with a rolling wheel located in the sliding groove. When the lifting beam 4 moves along the length direction of the column 2, the rolling wheel and the groove wall of the sliding groove roll relative to each other, which, on the one hand, enables the rolling wheel to guide the lifting beam 4, and on the other hand, reduces the friction between the lifting beam 4 and the column 2.

[0057] It can be understood that the cross-sectional shape of the column 2 is C-shaped or H-shaped, that is, the column 2 is C-shaped steel or H-shaped steel.

[0058] In other embodiments, the lifting beam 4 may also be slidably connected to the column 2 in other ways, such as the cooperation of a sliding block and a sliding groove.

[0059] The present application does not specifically limit the positional relationship between the sprocket 6 and the telescopic drive member 5. Preferably, refer to Figure 1The sprocket 6 and the linkage shaft 41 are located at the top of the lifting beam 4, so that the linkage shaft 41 can avoid the telescopic drive member 5, so as to ensure that the sprockets 6 at both ends of the lifting beam 4 can rotate synchronously, so as to further ensure the safety of the lifting device; the sprocket 6 is located on the side of the telescopic drive member 5 close to the column 2, so that the position of the sprocket 6 is closer to the end of the lifting platform 1, so as to further reduce the risk of the lifting platform 1 being tilted due to the non-central placement of the goods, thereby further improving the balance of the lifting platform 1, so as to further increase the safety of the lifting device. Since the sprocket 6 and the linkage shaft 41 are located at the top of the lifting beam 4.

[0060] In other embodiments, the sprocket 6 may also be disposed on the top of the lifting beam 4 , and the sprocket 6 is located on the side of the telescopic driving member 5 away from the column 2 .

[0061] The present application does not specifically limit the structure of the sprocket 6 and the chain 7. Preferably, refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 The sprocket 6 includes a first wheel body 61 and a second wheel body 62 spaced apart from the first wheel body 61, and the chain 7 includes a first chain body 71 meshingly connected to the first wheel body 61 and a second chain body 72 meshingly connected to the second wheel body 62, thereby increasing the structural strength of the chain 7 to ensure the service life of the lifting device and further increase the safety of the lifting device.

[0062] Further, see Figure 5 The sprocket 6 also includes a connecting pipe 63 located between the first wheel body 61 and the second wheel body 62, and the two ends of the connecting pipe 63 are respectively fixedly connected to the first wheel body 61 and the second wheel body 62, and the connecting pipe 63 is sleeved on the linkage shaft 41, so that the first wheel body 61 and the second wheel body 62 are connected as a whole, so as to facilitate the installation of the sprocket 6 on the linkage shaft 41, so as to improve the assembly efficiency of the lifting device; at the same time, the first wheel body 61 and the second wheel body 62 can keep synchronous rotation under the action of the connecting pipe 63, so as to greatly reduce the difficulty of keeping the sprockets 6 located at both ends of the lifting beam 4 to keep synchronous rotation.

[0063] Further, see Figure 3 and Figure 6 Both ends of the first chain body 71 and the second chain body 72 are provided with connecting parts 8, and the connecting part 8 includes a main body 81, an adjusting column 82 arranged at the end of the main body 81, and an adjusting nut 83 threadedly connected to the adjusting column 82. The main body 81 is provided with a connecting pin 811 penetrating the ends of the first chain body 71 and the second chain body 72. The connecting beam 3 and the lifting platform 1 are both provided with fixing parts 9, the adjusting column 82 is penetrated by the fixing part 9, and the adjusting nut 83 abuts against the side of the fixing part 9 away from the main body 81.

[0064] When installing the chain 7, first fix the connecting piece 8 at one end of the chain 7 to the corresponding fixing piece 9 so that the adjusting nut 83 is located on the side of the fixing piece 9 away from the main body 81, and then the other end of the chain 7 is passed around the sprocket 6 and fixedly connected to another fixing piece 9 to complete the installation of the chain 7. During this process, you only need to twist the adjusting nut 83, which greatly reduces the difficulty of installing the chain 7.

[0065] Since the connecting member 8 in the present application includes a main body 81, an adjusting column 82 and an adjusting nut 83, after the chain 7 is installed and connected to the crossbeam 3 and the lifting beam 4, the chain 7 can be adjusted by adjusting the adjusting nut to ensure the driving efficiency of the lifting platform 1.

[0066] Preferably, one end of the connecting pin 811 has a blocking plate, the diameter of the blocking plate is larger than the diameter of the connecting pin 811, and the other end of the connecting pin 811 is provided with a through hole, in which a blocking rod is provided, so as to facilitate the disassembly of the chain 7 and increase the connection stability between the main body 81 and the chain 7.

[0067] Further, refer to Figure 6 The fixing member 9 has a center hole, and a threaded protection tube 831 is provided on the side of the adjusting nut 83 close to the body 81 and is sleeved on the outside of the adjusting column 82. The outer diameter of the threaded protection tube 831 is smaller than the aperture of the center hole, and the outer diameter of the adjusting nut 83 is larger than the aperture of the center hole.

[0068] Since the outer diameter of the threaded protection tube 831 is smaller than the diameter of the center hole, after the connecting piece 8 is installed on the fixing piece 9, the threaded protection tube 831 can extend into the center hole, so that the threaded protection tube 831 can protect the threads on the adjusting column 82, thereby preventing the threads on the adjusting column 82 from being damaged due to relative shaking between the adjusting column 82 and the fixing piece 9.

[0069] The present application does not specifically limit the connection relationship between the threaded protection tube 831 and the adjusting column 82. Preferably, the threaded protection tube 831 is threadedly connected to the adjusting column 82 to increase the connection stability between the adjusting nut 83 and the adjusting column 82. In other embodiments, the threaded protection tube 831 can also be simply sleeved with the adjusting column 82.

[0070] Furthermore, a gasket is provided on the outside of the threaded protection tube 831, and the diameter of the gasket is larger than the diameter of the adjusting nut 83. The adjusting nut 83 is pressed against the side of the fixing member 9 away from the main body 81 through the gasket to increase the contact area between the adjusting nut 83 and the fixing member 9, thereby increasing the stability of the chain 7.

[0071] The present application does not specifically limit the structure of the fixing member 9. Preferably, the fixing member 9 is a tubular structure to reduce the production cost of the lifting device. In other embodiments, the fixing member 9 can also be a block structure with a hole structure.

[0072] In other embodiments, only one sprocket 6 may be provided, and one chain 7 is provided corresponding to the sprocket 6 .

[0073] In a preferred embodiment, referring to Figure 1 and Figure 2 , bearing seats 42 fixedly connected to the lifting beam 4 are provided on both sides of each sprocket 6, and the linkage shaft 41 is penetrated by the bearing seats 42, so that the bearing seats 42 support the linkage shaft 41 to ensure the structural strength of the linkage shaft 41, and avoid the bending of the linkage shaft 41 due to the pressure of the sprocket 6, thereby ensuring the service life of the linkage shaft 41 and ensuring the smooth lifting and lowering of the lifting platform 1.

[0074] Preferably, the outer sleeve of the linkage shaft 41 is provided with a bearing located in the bearing seat 42 to reduce the friction between the linkage shaft 41 and the bearing seat 42, thereby increasing the service life of the linkage shaft 41 and further increasing the service life of the lifting device.

[0075] Further, refer to Figure 5 The linkage shaft 41 is provided with a limiting portion 411 located on the inner side of the bearing seat 42. The limiting portion 411 can cooperate with the bearing seat 42 to stop the linkage shaft 41 in the axial direction, so that the limiting portion 411 and the stop cooperation of the bearing seat 42 can limit the movement of the linkage shaft 41 in its axial direction, so as to increase the stability of the linkage shaft 41, and at the same time avoid the situation where the lifting platform 1 is subjected to a deflection force in the horizontal direction due to the displacement of the linkage shaft 41 in its axial direction, thereby further ensuring the smooth lifting and lowering of the lifting platform 1.

[0076] Furthermore, a plane bearing is arranged between the limiting part 411 and the bearing seat 42, so that the limiting part 411 cooperates with the bearing seat 42 stopper in the axial direction of the linkage shaft 41 through the plane bearing, thereby reducing the friction between the limiting part 411 and the bearing seat 42, on the one hand ensuring the service life of the limiting part 411, and on the other hand reducing the noise during the operation of the lifting device, thereby improving the user experience.

[0077] The present application does not specifically limit the structure of the limiting portion 411. Preferably, the limiting portion 411 is an annular structure sleeved on the linkage shaft 41 to ensure the stopper matching effect of the limiting portion 411 and the bearing seat 42. In other implementation examples, the limiting portion 411 can also be a block structure or other structures that can stopper match the bearing seat 42.

[0078] The present application does not specifically limit the connection relationship between the limiter 411 and the linkage shaft 41. Preferably, the limiter 411 is fixedly connected to the linkage shaft 41 by screws. In other implementation examples, the limiter 411 can also be fixedly connected to the linkage shaft 41 by welding or integral molding.

[0079] Further, see Figure 2 The lifting beam 4 is fixedly connected with a support tube 43, and the axial direction of the support tube 43 is perpendicular to the axial direction of the lifting beam 4. The bearing seat 42 is arranged on the support tube 43 to increase the distance between the linkage shaft 41 and the lifting beam 4, so that the space between the linkage shaft 41 and the lifting beam 4 can accommodate the sprocket 6, so as to avoid the situation of setting other components on the lifting beam 4, and at the same time, it can also achieve the effect of facilitating the fixing of the bearing seat 42.

[0080] The present application does not specifically limit the connection method between the sprocket 6 and the linkage shaft 41. Preferably, the sprocket 6 and the linkage shaft 41 are provided with key slots, and the sprocket 6 and the linkage shaft 41 are connected by a key bar passing through the key slot to achieve synchronous rotation of the sprocket 6 and the linkage shaft 41. In other embodiments, the sprocket 6 can also be fixedly connected to the linkage shaft 41 by welding.

[0081] In a preferred embodiment, referring to Figure 1 and Figure 2 The lifting device also includes a pulley 44 rotatably connected to the bottom of the lifting beam 4 and a wire rope 441 that is bent around the pulley 44. One end of the wire rope 441 is fixedly connected to the connecting beam 3, and the other end of the wire rope 441 is fixedly connected to the lifting platform 1 to increase the connection point between the lifting beam 4 and the lifting platform 1, thereby further increasing the safety of the lifting platform 1.

[0082] In a preferred embodiment, referring to Figure 1 The connecting beam 3 is provided with a U-shaped rod, and a limiting space is formed between the U-shaped rod and the connecting beam 3. The telescopic driving member 5 is penetrated through the limiting space. It can be understood that the U-shaped rod is in contact with the outer wall of the telescopic driving member 5, so that the U-shaped rod and the connecting beam 3 limit the telescopic driving member 5 to increase the stability of the telescopic driving member 5.

[0083] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0084] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0085] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A lifting device for solving the problem of overloading of a large platform, characterized in that: include: Lifting platform (1); At least four columns (2) are provided and are respectively located on two opposite sides of the lifting platform (1); Two connecting cross beams (3) are provided and are located on opposite sides of the lifting platform (1), and each connecting cross beam (3) is connected to a plurality of columns (2) located on one side of the lifting platform (1); A lifting beam (4), two of which are provided and are located on opposite sides of the lifting platform (1), and each of the lifting beams (4) is slidably connected to the corresponding column (2) and is located above the lifting platform (1) and the connecting beam (3). Both ends of each lifting beam (4) are rotatably connected to a sprocket (6). The sprockets (6) located at both ends of the same lifting beam (4) are connected by transmission via a linkage shaft (41). Each sprocket (6) is meshedly connected to a chain (7), and both ends of each chain (7) are respectively connected to the connecting beam (3) and the lifting platform (1); At least two telescopic drive members (5) are provided and are respectively located on two opposite sides of the lifting platform (1), and the telescopic drive members (5) are used to drive the corresponding lifting beam (4) to rise and fall.

2. A lifting device for solving the problem of overloading of a large platform according to claim 1, characterized in that: The sprocket (6) and the linkage shaft (41) are located at the top of the lifting beam (4), and the sprocket (6) is located on a side of the telescopic driving member (5) close to the column (2).

3. A lifting device for solving the problem of overloading of a large platform according to claim 1, characterized in that: The sprocket (6) comprises a first wheel body (61) and a second wheel body (62) spaced apart from the first wheel body (61); the chain (7) comprises a first chain body (71) meshingly connected to the first wheel body (61) and a second chain body (72) meshingly connected to the second wheel body (62).

4. A lifting device for solving the problem of overloading of a large platform according to claim 3, characterized in that: The sprocket (6) further comprises a connecting tube (63) located between the first wheel body (61) and the second wheel body (62), the two ends of the connecting tube (63) being respectively fixedly connected to the first wheel body (61) and the second wheel body (62), and the connecting tube (63) being sleeved on the linkage shaft (41).

5. A lifting device for solving the problem of overloading of a large platform according to claim 3, characterized in that: Connecting members (8) are provided at both ends of the first chain body (71) and the second chain body (72), and the connecting member (8) comprises a main body (81), an adjusting column (82) provided at the end of the main body (81), and an adjusting nut (83) threadedly connected to the adjusting column (82); the main body (81) is provided with a connecting pin (811) passing through the ends of the first chain body (71) and the second chain body (72); the connecting cross beam (3) and the lifting platform (1) are both provided with a fixing member (9); the adjusting column (82) passes through the fixing member (9), and the adjusting nut (83) contacts the side of the fixing member (9) facing away from the main body (81).

6. A lifting device for solving the problem of overloading of a large platform according to claim 5, characterized in that: The fixing member (9) has a central hole, and a threaded protection tube (831) sleeved on the outside of the adjusting column (82) is provided on a side of the adjusting nut (83) close to the body (81), the outer diameter of the threaded protection tube (831) being smaller than the aperture of the central hole, and the outer diameter of the adjusting nut (83) being larger than the aperture of the central hole.

7. The lifting device for solving the problem of overloading of a large platform according to claim 1 is characterized in that: Both sides of each sprocket (6) are provided with bearing seats (42) fixedly connected to the lifting beam (4), and the linkage shaft (41) passes through the bearing seats (42).

8. A lifting device for solving the problem of overloading of a large platform according to claim 7, characterized in that: The linkage shaft (41) is provided with a limiting portion (411) located inside the bearing seat (42), and the limiting portion (411) can cooperate with the bearing seat (42) to stop the linkage shaft (41) in the axial direction.

9. A lifting device for solving the problem of overloading of a large platform according to claim 8, characterized in that: A plane bearing is provided between the limiting portion (411) and the bearing seat (42), so that the limiting portion (411) can engage with the bearing seat (42) in a stop manner in the axial direction of the linkage shaft (41) through the plane bearing.

10. A lifting device for solving the problem of overloading of a large platform according to claim 7, characterized in that: The lifting beam (4) is fixedly connected to a support tube (43), and the bearing seat (42) is arranged on the support tube (43) to increase the distance between the linkage shaft (41) and the lifting beam (4).

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