Linkage structure of lifting device

Abstract

The linkage structure of the lifting device comprises a first lifting frame, a second lifting frame and a third lifting frame, the second lifting frame is located on the inner side of the first lifting frame, the third lifting frame is located on the inner side of the second lifting frame, the lower end of the first lifting frame is fixedly connected with a first control bin, and the lower end of the second lifting frame is fixedly connected with a second control bin. Movable trundles are movably installed at the lower end of the first control bin, a second control bin is fixedly connected to the lower end of the second lifting frame, a first limiting plate is fixedly connected to the lower end of the second control bin, and a second limiting plate is fixedly connected to the lower end of the third lifting frame. According to the linkage structure of the lifting device, multi-stage lifting control is achieved, and linkage of the lifting rod is synchronously driven and controlled through meshing between the first bevel gear and the second bevel gear; the lifting of each stage is accurately adjusted by respectively driving and controlling the rotation of a lifting rod and a threaded rod through a first control motor and a second control motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lifting device, concretely is a kind of linkage structure of lifting device. BACKGROUND

[0002] Lifting device is a kind of mechanical equipment, mainly for realizing the movement of object in vertical direction, they are widely used in various industries and scenes, such as aerial work, industrial production, medical equipment, transportation, etc., the design and manufacture of lifting device usually need to consider load capacity, stability, safety, operation convenience and other factors.

[0003] Common linkage structure of lifting device, such as steel wire rope and pulley system, usually needs larger installation space, and this structure with large space occupation can limit the application scene of lifting device, especially in the environment with limited space, and traditional simple hydraulic or pneumatic lifting structure can not realize accurate lifting control, and position deviation is prone to occur, and usually lifting structure is single-stage lifting, and single-stage lifting structure can realize larger lifting range by larger installation space, which brings certain adverse effect to the use process of people, therefore, we propose a linkage structure of lifting device. UTILITY MODEL CONTENT

[0004] The technical problem solved is that, in view of the deficiencies of the prior art, the utility model provides a linkage structure of lifting device, which has the advantages of realizing multi-stage lifting, realizing accurate control of lifting action, and accurately adjusting the rotation of control lifting rod and threaded rod in each stage by driving and controlling the control lifting rod and threaded rod by a first control motor and a second control motor, so as to effectively solve the problems in the background art.

[0005] Technical scheme: in order to achieve the above purpose, the utility model adopts the technical scheme that a linkage structure of lifting device, including a first lifting frame, a second lifting frame and a third lifting frame, the second lifting frame is located on the inner side of the first lifting frame, the third lifting frame is located on the inner side of the second lifting frame, the lower end of the first lifting frame is fixedly connected with a first control bin, the lower end of the first control bin is movably provided with a movable trundle, the lower end of the second lifting frame is fixedly connected with a second control bin, the lower end of the second control bin is fixedly connected with a first limiting plate, and the lower end of the third lifting frame is fixedly connected with a second limiting plate.

[0006] Preferably, the lower end of the first lifting frame is fixed with the upper end of the first control bin by welding, the four corners of the lower end of the first control bin are movably connected with the upper end of the outer wall of the movable caster through bearings, the lower end of the second lifting frame is fixed with the upper end of the second control bin by welding, the lower end of the second control bin is fixedly connected with the upper end of the first limiting plate, the lower end of the third lifting frame is fixed with the upper end of the second limiting plate by strong glue, the inner side of the first lifting frame is movably connected with the outer wall of the second lifting frame, and the inner side of the second lifting frame is movably connected with the outer wall of the third lifting frame.

[0007] Preferably, the middle part of the inside of the first control bin is fixedly connected with a first control motor, both ends of the first control motor are movably connected with a connecting rotating rod, one end of the connecting rotating rod is fixedly connected with a first bevel gear, both sides of the upper end of the first control bin are movably connected with a rotating linkage rod, the lower end of the rotating linkage rod is fixedly connected with a second bevel gear, the upper end of the rotating linkage rod is fixedly connected with a control lifting rod, and the control lifting rod is located on the inside of both sides of the first lifting frame and is movably connected with both sides of the upper end of the first lifting frame.

[0008] Preferably, the middle part of the inside of the first control bin is fixedly connected with a first control motor, both ends of the first control motor are movably connected with a connecting rotating rod, one end of the connecting rotating rod is fixedly connected with a first bevel gear, both sides of the upper end of the first control bin are movably connected with a rotating linkage rod, the lower end of the rotating linkage rod is fixedly connected with a second bevel gear, the upper end of the rotating linkage rod is fixedly connected with a control lifting rod, and the control lifting rod is located on the inside of both sides of the first lifting frame and is movably connected with both sides of the upper end of the first lifting frame.

[0009] Preferably, the two inner walls of the first limiting plate are provided with threaded holes, one side of the second control bin is detachably connected with a first heat dissipation net, the inside of the second control bin is fixedly connected with a second control motor, the inside of the second lifting frame is fixedly connected with a threaded rod, and both sides of the inner wall of the second lifting frame are fixedly connected with a guide stabilizing rod.

[0010] Preferably, the first limiting plate is movably arranged on the outer wall of the control lifting rod through the threaded hole, one side of the second control bin is detachably connected with the outer wall of the first heat dissipation net through buckles, the upper end of the inner wall of the second control bin is fixedly connected with the upper end of the second control motor through bolts, the lower end of the outer wall of the threaded rod penetrates the inner wall of the lower end of the second lifting frame and the inner wall of the upper end of the second control bin and is connected between the second control motor, and the inner walls of both sides of the second lifting frame are fixedly connected with the upper and lower ends of the guide stabilizing rod.

[0011] Preferably, the inner wall of both sides of the second limiting plate is provided with a through guide hole, one side of the first lifting frame is fixedly connected with a handle, and the front end inner wall of the first control bin is detachably connected with a second heat sink.

[0012] Preferably, the second limiting plate is sleeved on the outer wall of the guide stabilizing rod through the through guide hole and is movable, the outer wall of the threaded rod and the inner wall of the third lifting frame are movably engaged through threads, one side of the first lifting frame and one side of the handle are fixed through bolts, and the front end inner wall of the first control bin and the outer wall of the second heat sink are detachably connected through buckles.

[0013] Advantages: compared with the prior art, the linkage structure of the lifting device has the following advantages: the linkage structure of the lifting device can realize multi-stage lifting control, the linkage of the control lifting rod is synchronously driven through the engagement between the first bevel gear and the second bevel gear, the precise control of the lifting action can be realized, the rotation of the control lifting rod and the threaded rod is controlled by the first control motor and the second control motor in each stage to realize precise adjustment, and the stability is high during lifting due to the use of the control lifting rod and the guide stabilizing rod, and deviation or shaking is not easy to occur, the lifting range is large in a small space through multi-stage lifting, each stage of lifting can be independently controlled, the flexibility of the system is increased, the handle and the movable caster wheel can also facilitate the movement and transfer of the device, the cooperation of the control lifting rod and the threaded hole has a self-locking function, the current position can be maintained when power failure or the first control motor stops driving, the first control motor drives the first bevel gear connected to the rotating rod to rotate, the second bevel gear engaged with the first bevel gear also rotates synchronously, and the control lifting rod located on both sides of the first lifting frame is also rotated, the first limiting plate is sleeved on the outer wall of the control lifting rod through the threaded hole, when the control lifting rod rotates, the lifting movement of the first limiting plate located in the first lifting frame is also controlled, the lifting movement of the second lifting frame is driven, the rotation of the threaded rod located in the second lifting frame is driven by the second control motor arranged in the second control bin, the outer wall of the threaded rod and the inner wall of the third lifting frame are engaged through threads, when the threaded rod rotates, the lifting of the third lifting frame located in the second lifting frame is also controlled, the second limiting plate is sleeved on the outer wall of the guide stabilizing rod through the through guide hole, the stability during lifting and movement is strengthened, the first heat sink can strengthen the heat dissipation effect of the second control motor during operation, the second heat sink can strengthen the heat dissipation effect of the first control motor during operation, and the handle and the movable caster wheel can facilitate the movement and transfer of the device as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the linkage structure of the lifting device.

[0015] Figure 2 It is the schematic view of the lifting of the second lifting frame and the third lifting frame in the linkage structure of the lifting device.

[0016] Figure 3 It is the structure schematic view of the first lifting frame, the first control bin, the movable caster, the control lifting rod, the second heat dissipation net and the handle in the linkage structure of the lifting device.

[0017] Figure 4 It is the exploded schematic view of the second lifting frame and the third lifting frame in the linkage structure of the lifting device.

[0018] Figure 5 It is the internal structure plane schematic view of the whole linkage structure of the lifting device.

[0019] In the drawing: 1, the first lifting frame; 2, the first control bin; 3, the movable caster; 4, the second lifting frame; 5, the second control bin; 6, the first limiting plate; 7, the third lifting frame; 8, the second limiting plate; 9, the first control motor; 10, the connecting rotary rod; 11, the first helical gear; 12, the rotary linkage rod; 13, the second helical gear; 14, the control lifting rod; 15, the second control motor; 16, the first heat dissipation net; 17, the threaded rod; 18, the guide stabilizing rod; 19, the threaded hole; 20, the through guide hole; 21, the second heat dissipation net; 22, the handle. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0021] As shown in the drawing, Figures 1-4 A linkage structure of a lifting device, comprising a first lifting frame 1, a second lifting frame 4 and a third lifting frame 7, the second lifting frame 4 is located at the inner side of the first lifting frame 1, the third lifting frame 7 is located at the inner side of the second lifting frame 4, the lower end of the first lifting frame 1 is fixedly connected with a first control bin 2, the lower end of the first control bin 2 movably installs a movable caster 3, the lower end of the second lifting frame 4 is fixedly connected with a second control bin 5, the lower end of the second control bin 5 is fixedly connected with a first limiting plate 6, the lower end of the third lifting frame 7 is fixedly connected with a second limiting plate 8, the second limiting plate 8 is sleeved on the outer wall of the guide stabilizing rod 18 by the through guide hole 20, which strengthens the stability during lifting and moving.

[0022] Further, the lower end of the first lifting frame 1 is fixed with the upper end of the first control bin 2 by welding, the four corners of the lower end of the first control bin 2 are movably connected with the outer wall of the upper end of the movable casters 3 through bearings, the lower end of the second lifting frame 4 is fixed with the upper end of the second control bin 5 by welding, the lower end of the second control bin 5 is fixedly connected with the upper end of the first limiting plate 6, the lower end of the third lifting frame 7 is fixed with the upper end of the second limiting plate 8 through strong glue, the inner side of the first lifting frame 1 is movably connected with the outer wall of the second lifting frame 4, the inner side of the second lifting frame 4 is movably connected with the outer wall of the third lifting frame 7, the first limiting plate 6 is sleeved on the outer wall of the control lifting rod 14 through the threaded hole 19, when the control lifting rod 14 rotates, the lifting movement of the first limiting plate 6 in the first lifting frame 1 is also controlled, and the lifting movement of the second lifting frame 4 is driven.

[0023] Further, the middle part of the first control bin 2 is fixedly connected with the first control motor 9, the two ends of the first control motor 9 are movably connected with the connecting rotating rods 10, one end of the connecting rotating rod 10 is fixedly connected with the first bevel gear 11, the two sides of the upper end of the first control bin 2 are movably connected with the rotating linkage rods 12, the lower end of the rotating linkage rod 12 is fixedly connected with the second bevel gear 13, the upper end of the rotating linkage rod 12 is fixedly connected with the control lifting rod 14, the control lifting rod 14 is located at the two sides in the first lifting frame 1 and is movably connected with the two sides of the upper end of the first lifting frame 1, the first control motor 9 in the first control bin 2 fixedly connected with the lower end of the first lifting frame 1 drives the first bevel gear 11 connected with the connecting rotating rod 10 to rotate, the second bevel gear 13 engaged with each other of the first bevel gear 11 also rotates synchronously, and the two sides of the control lifting rod 14 located in the first lifting frame 1 are driven to rotate.

[0024] Further, the middle part of the first control bin 2 is fixedly connected with the first control motor 9, the two ends of the first control motor 9 are movably connected with the connecting rotating rods 10, one end of the connecting rotating rod 10 is fixedly connected with the first bevel gear 11, the two sides of the upper end of the first control bin 2 are movably connected with the rotating linkage rods 12, the lower end of the rotating linkage rod 12 is fixedly connected with the second bevel gear 13, the upper end of the rotating linkage rod 12 is fixedly connected with the control lifting rod 14, the control lifting rod 14 is located at the two sides in the first lifting frame 1 and is movably connected with the two sides of the upper end of the first lifting frame 1, the first control motor 9 in the first control bin 2 fixedly connected with the lower end of the first lifting frame 1 drives the first bevel gear 11 connected with the connecting rotating rod 10 to rotate, the second bevel gear 13 engaged with each other of the first bevel gear 11 also rotates synchronously, and the two sides of the control lifting rod 14 located in the first lifting frame 1 are driven to rotate.

[0025] Further, the two side inner walls of the first limiting plate 6 are provided with threaded holes 19, one side of the second control bin 5 is detachably connected with a first heat sink 16, the second control bin 5 is fixedly connected with a second control motor 15, the inside of the second lifting frame 4 is fixedly connected with a threaded rod 17, the two sides of the inner wall of the second lifting frame 4 are fixedly connected with guide stabilizing rods 18, and the stability is improved.

[0026] Further, the first limiting plate 6 is sleeved on the outer wall of the control lifting rod 14 and is movable through the threaded holes 19, the outer wall of the first heat sink 16 is detachably connected with the side of the second control bin 5 through buckles, the upper end of the inner wall of the second control bin 5 is fixed with the upper end of the second control motor 15 through bolts, the lower end of the threaded rod 17 is connected with the second control motor 15 through the inner wall of the lower end of the second lifting frame 4 and the inner wall of the upper end of the second control bin 5, and the inner walls of the two sides of the second lifting frame 4 are fixedly connected with the upper and lower ends of the guide stabilizing rods 18, and the firmness is improved.

[0027] Further, the two side inner walls of the second limiting plate 8 are provided with through guide holes 20, one side of the first lifting frame 1 is fixedly connected with a handle 22, and the front end inner wall of the first control bin 2 is detachably connected with a second heat sink 21, and the second heat sink 21 improves the heat dissipation effect of the first control motor 9 during operation.

[0028] Further, the second limiting plate 8 is sleeved on the outer wall of the guide stabilizing rod 18 and is movable through the through guide holes 20, the outer wall of the threaded rod 17 is movable through the screwing of the inner wall of the third lifting frame 7, one side of the first lifting frame 1 is fixed with one side of the handle 22 through bolts, and the front end inner wall of the first control bin 2 is detachably connected with the outer wall of the second heat sink 21 through buckles, and the disassembly and assembly are facilitated.

[0029] Working principle: the linkage structure of the lifting device, including a lifting frame 1, a control bin 2, a mobile caster 3, a second lifting frame 4, a second control bin 5, a first limiting plate 6, a third lifting frame 7, a second limiting plate 8, a first control motor 9, a connecting rotating rod 10, a first bevel gear 11, a rotating linkage rod 12, a second bevel gear 13, a control lifting rod 14, a second control motor 15, a first heat sink 16, a threaded rod 17, a guide stabilizing rod 18, a threaded hole 19, a through guide hole 20, a second heat sink 21 and a handle 22, can realize multi-stage lifting control, the linkage of the control lifting rod 14 is driven synchronously through the meshing between the first bevel gear 11 and the second bevel gear 13, the precise control of the lifting action can be realized, the rotation of the control lifting rod 14 and the threaded rod 17 is controlled by the first control motor 9 and the second control motor 15 to drive respectively in each stage of lifting, the rotation is precisely adjusted, and due to the use of the control lifting rod 14 and the guide stabilizing rod 18, the stability during lifting is high, and deviation or shaking is not easy to occur, through multi-stage lifting, a larger lifting range can be realized in a smaller space, each stage of lifting can be independently controlled, the flexibility of the system is increased, the handle 22 and the mobile caster 3 can also facilitate the movement and transfer of the device, the cooperation of the control lifting rod 14 and the threaded hole 19 has a self-locking function, the current position can be maintained when power failure or the first control motor 9 stops driving, and it will not slide down due to load, the first control motor 9 arranged in the first control bin 2 fixedly connected to the lower end of the first lifting frame 1 drives the first bevel gear 11 connected to the connecting rotating rod 10 to rotate, the second bevel gear 13 meshing with each other of the first bevel gear 11 also rotates synchronously, and the control lifting rod 14 located on both sides in the first lifting frame 1 is also rotated, the first limiting plate 6 is sleeved on the outer wall of the control lifting rod 14 through the threaded hole 19, when the control lifting rod 14 rotates, the lifting movement of the first limiting plate 6 in the first lifting frame 1 is also controlled, the lifting movement of the second lifting frame 4 is driven, and the rotation of the threaded rod 17 in the second lifting frame 4 is driven by the second control motor 15 arranged in the second control bin 5, the inner wall of the third lifting frame 7 and the outer wall of the threaded rod 17 are meshed with each other through threads, when the threaded rod 17 rotates, the lifting of the third lifting frame 7 in the second lifting frame 4 is also controlled, and the second limiting plate 8 is sleeved on the outer wall of the guide stabilizing rod 18 through the through guide hole 20, the stability during lifting and moving is strengthened, the first heat sink 16 can strengthen the heat dissipation effect of the second control motor 15 during operation, the second heat sink 21 can strengthen the heat dissipation effect of the first control motor 9 during operation, and the handle 22 and the mobile caster 3 can facilitate the movement and transfer of the device as a whole.

[0030] It is to be noted that, in the present document, relational terms such as first and second, and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0031] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A linkage structure for a lifting device, comprising a first lifting frame (1), a second lifting frame (4), and a third lifting frame (7), characterized in that: The second lifting frame (4) is located inside the first lifting frame (1), and the third lifting frame (7) is located inside the second lifting frame (4). The lower end of the first lifting frame (1) is fixedly connected to the first control compartment (2), and the lower end of the first control compartment (2) is movably equipped with a movable caster (3). The lower end of the second lifting frame (4) is fixedly connected to the second control compartment (5), and the lower end of the second control compartment (5) is fixedly connected to the first limiting plate (6). The lower end of the third lifting frame (7) is fixedly connected to the second limiting plate (8).

2. The linkage structure of a lifting device according to claim 1, characterized in that: The lower end of the first lifting frame (1) is fixed to the upper end of the first control compartment (2) by welding. The four corners of the lower end of the first control compartment (2) are connected to the upper outer wall of the movable caster (3) by bearings. The lower end of the second lifting frame (4) is fixed to the upper end of the second control compartment (5) by welding. The lower end of the second control compartment (5) is fixedly connected to the upper end of the first limiting plate (6). The lower end of the third lifting frame (7) is fixed to the upper end of the second limiting plate (8) by strong adhesive. The inner side of the first lifting frame (1) is movably connected to the outer wall of the second lifting frame (4). The inner side of the second lifting frame (4) is movably connected to the outer wall of the third lifting frame (7).

3. The linkage structure of a lifting device according to claim 2, characterized in that: A control motor (9) is fixedly connected to the center of the first control compartment (2). Both ends of the first control motor (9) are movably connected to a connecting rotating rod (10). One end of the connecting rotating rod (10) is fixedly connected to a first helical gear (11). Rotating linkage rods (12) are movably connected to both sides of the upper end of the first control compartment (2). A second helical gear (13) is fixedly connected to the lower end of the rotating linkage rod (12). A control lifting rod (14) is fixedly connected to the upper end of the rotating linkage rod (12). The control lifting rod (14) is located on both sides inside the first lifting frame (1) and its upper outer wall is movably connected to both sides of the upper end of the first lifting frame (1).

4. The linkage structure of a lifting device according to claim 3, characterized in that: The middle part of the first control compartment (2) is fixed to the upper end of the first control motor (9) by bolts. Both ends of the first control motor (9) are movably connected to one end of the connecting rotating rod (10). The other end of the connecting rotating rod (10) is fixedly connected to the rear end of the first helical gear (11). The outer wall of the rotating linkage rod (12) passes through both sides of the lower end of the first lifting frame (1) and both sides of the upper end of the first control compartment (2) and moves through the bearing. The lower end of the rotating linkage rod (12) is fixedly connected to the upper end of the second helical gear (13). The upper end of the rotating linkage rod (12) is fixedly connected to the lower end of the control lifting rod (14). The outer wall of the upper end of the control lifting rod (14) passes through both sides of the upper end of the first lifting frame (1) and moves through the bearing. The first helical gear (11) and the second helical gear (13) mesh with each other for transmission.

5. The linkage structure of a lifting device according to claim 4, characterized in that: The inner walls of both sides of the first limiting plate (6) are provided with threaded holes (19). The first heat dissipation mesh (16) is detachably connected to one side of the second control compartment (5). The second control motor (15) is fixedly connected inside the second control compartment (5). The threaded rod (17) is fixedly connected inside the second lifting frame (4). The guide stabilizing rod (18) is fixedly connected to both sides of the inner wall of the second lifting frame (4).

6. The linkage structure of a lifting device according to claim 5, characterized in that: The first limiting plate (6) is fitted onto the outer wall of the control lifting rod (14) through the threaded hole (19) and is movable. One side of the second control compartment (5) is detachably connected to the outer wall of the first heat dissipation mesh (16) by a buckle. The upper end of the inner wall of the second control compartment (5) is fixed to the upper end of the second control motor (15) by bolts. The lower end of the threaded rod (17) penetrates the lower end of the inner wall of the second lifting frame (4) and the upper end of the inner wall of the second control compartment (5) and is connected to the second control motor (15). The inner walls on both sides of the second lifting frame (4) are fixedly connected to the upper and lower ends of the guide stabilizing rod (18).

7. The linkage structure of a lifting device according to claim 6, characterized in that: The inner walls on both sides of the second limiting plate (8) are provided with through guide holes (20), and a handle (22) is fixedly connected to one side of the first lifting frame (1). The inner wall of the front end of the first control compartment (2) is detachably connected with the second heat dissipation mesh (21).

8. The linkage structure of a lifting device according to claim 7, characterized in that: The second limiting plate (8) is sleeved on the outer wall of the guide stabilizing rod (18) through the through guide hole (20) and moves. The outer wall of the threaded rod (17) and the inner wall of the third lifting frame (7) are engaged by threads and move together. One side of the first lifting frame (1) and one side of the handle (22) are fixed by bolts. The inner wall of the front end of the first control compartment (2) and the outer wall of the second heat dissipation mesh (21) are detachably connected by a buckle.

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