Screen frame lifting structure driven by gear and rack

Abstract

The utility model discloses a gear rack driven screen frame lifting structure, which comprises a bearing beam, a screen frame, a second gear, a lifting rack and third gears, the output end of a servo motor is fixedly connected with a first gear, the first gear is meshed with the second gear, the second gear is fixed on a second connecting rod, and the third gears are fixed at two ends of the second connecting rod. The servo motor drives the gears to rotate, the rotating gears are meshed with the racks to drive the screen frame to ascend and descend, the screen frame is driven by power when descending and ascending, and the screen frame is driven by the power when descending and ascending. A traditional pneumatic driving structure is replaced, the structure is simpler, and the maintenance cost is reduced while the working efficiency is improved; when the screen frame ascends and descends, the lifting plate can be limited by the limiting sliding blocks, deviation of the screen frame in the ascending and descending process is avoided, and the ascending and descending displacement precision of the screen frame is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screen frame lifting structures, in particular to a screen frame lifting structure driven by a gear rack. Background Art

[0002] The traditional mesh frame lifting structure is a cylinder-driven cam or inclined block that forces the mesh frame to rise. The existing mesh frame lifting structure can basically meet the needs. During use, the cam or inclined block is reset by the cylinder. When the mesh frame descends, it falls freely by its own gravity. There is no power drive, and the descent speed is slow, resulting in low production efficiency. At the same time, during the lifting process of the traditional mesh frame, the mesh frame is lifted and lowered by relying on the extension and contraction of the cylinder. It needs to be equipped with a pneumatic structure as a power source, and the structure is complex, which increases the cost of structural maintenance. In addition, the traditional mesh frame lacks a limiting structure during lifting, and the lifting is unstable and prone to offset, which affects the displacement accuracy of the lifting. Therefore, it is necessary to design a gear rack driven mesh frame lifting structure. Utility Model Content

[0003] The utility model aims to provide a gear rack driven screen frame lifting structure to solve the problem that the existing screen frame has no power drive when descending, the descending speed is slow, and the production efficiency is low. The screen frame is pushed by a cylinder when rising, and a pneumatic structure needs to be carried as a power source, and the structure is complex. At the same time, the screen frame lacks a limiting structure, is unstable when lifting, and is prone to deviation, which affects the accuracy.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a gear rack driven net frame lifting structure, comprising a load-bearing beam, a net frame, a servo motor, a first support frame, a first gear, a second gear, a second support frame, a third gear, a lifting rack, a guide column, a limit slider, a first connecting rod, a third support frame, a bearing seat, a second connecting rod, a lifting plate, a threaded rod, a baffle, a guide plate, a reducer and a fifth support frame, wherein the first support frame is fixed on the load-bearing beam, the fifth support frame is symmetrically installed on the load-bearing beam, the second support frame is installed on the fifth support frame, a bearing seat is fixed on one side of the second support frame, a second connecting rod is connected to the bearing seat through a bearing, third gears are fixed at both ends of the second connecting rod, the third gear meshes with the lifting rack, the lifting rack is connected to the threaded rod through a threaded fit, the threaded rod is rotatably connected to the lifting plate, the lifting plate is fixed on the guide plate, a guide column is fixed on the top of the fifth support frame, a limit slider is slidably connected to the limit guide rail arranged on the guide column, the first connecting rod is fixed on the limit slider, and the third support frame is installed at one end of the first connecting rod.

[0005] Preferably, a reducer is fixed on one side of the first support frame, and a servo motor is installed on one side of the reducer.

[0006] Preferably, the third supporting frame is connected and fixed on the screen frame.

[0007] Preferably, a baffle is installed on the top of the guide column.

[0008] Preferably, guide plates are symmetrically installed on both sides of the screen frame.

[0009] Preferably, the output end of the servo motor is connected to the reducer.

[0010] Preferably, the output end of the reducer is connected to a first gear, the first gear meshes with a second gear, and the second gear is fixed on a second connecting rod.

[0011] The rack-and-pinion driven screen frame lifting structure provided by the utility model has the advantages that: the first gear is driven to rotate by a servo motor, and then the second connecting rod is driven to rotate through the mutual meshing of the first gear and the second gear, and then the rotating second connecting rod drives the third gear at both ends to rotate, and the meshing of the third gear and the lifting rack makes the lifting rack drive the lifting plate and the screen frame to lift and lower, thereby replacing the traditional pneumatic drive mode, having a simple structure and reducing maintenance costs; the rack-and-pinion drive structure replaces the traditional pneumatic structure, and the screen frame has power drive when descending, thereby improving work efficiency; and when the screen frame is lifted and lowered, the limit slider slides on the limit guide rail of the guide column to limit the lifting plate, thereby preventing the lifting rack from shifting during the meshing process with the third gear, making the screen frame more stable when lifted and lowered, and improving the displacement accuracy of the screen frame lifting and lowering. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 for Figure 1 A magnified view of the structure in the middle A area;

[0015] Figure 3 for Figure 1 A magnified view of the structure in the middle B area;

[0016] In the figure: 1. load-bearing beam; 2. net frame; 3. servo motor; 4. first support frame; 5. first gear; 6. second gear; 7. second support frame; 8. third gear; 9. lifting rack; 10. guide column; 11. limit slider; 12. first connecting rod; 13. third support frame; 14. bearing seat; 15. second connecting rod; 16. lifting plate; 17. threaded rod; 18. baffle; 19. guide plate; 20. reducer; 21. fifth support frame. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1-3The utility model provides an embodiment: a gear rack driven screen frame lifting structure, including a load-bearing beam 1, a screen frame 2, a servo motor 3, a first support frame 4, a first gear 5, a second gear 6, a second support frame 7, a third gear 8, a lifting rack 9, a guide column 10, a limit slider 11, a first connecting rod 12, a third support frame 13, a bearing seat 14, a second connecting rod 15, a lifting plate 16, a threaded rod 17, a baffle 18, a guide plate 19, a reducer 20 and a fifth support frame 21. The load-bearing beam 1 is fixed with a first support frame 4, which supports and fixes the servo motor 3, the reducer 20 and the first gear 5. A fifth support frame 21 is symmetrically installed on the heavy beam 1, and a second support frame 7 is installed on the fifth support frame 21. A bearing seat 14 is fixed on one side of the second support frame 7. A second connecting rod 15 is connected to the bearing seat 14 through a bearing. The bearing seat 14 is rollingly connected to the second connecting rod 15, which reduces the friction force that the second connecting rod 15 will be subjected to. A third gear 8 is fixed at both ends of the second connecting rod 15. The third gear 8 meshes with a lifting rack 9. The lifting rack 9 is connected to the threaded rod 17 through a threaded fit. The threaded rod 17 is rotatably connected to the lifting plate 16. The lifting plate 16 is fixed on the guide plate 19. The guide groove provided on the guide plate 19 guides The lifting plate 16 slides up and down, and the lifting plate 16 sliding up and down will drive the screen frame 2 to slide up and down. A guide column 10 is fixedly installed on the top of the fifth support frame 21. The fifth support frame 21 connects the load-bearing beam 1 and the guide column 10 together to form a whole. The limiting guide rail set on the guide column 10 is slidably connected to the limiting slider 11. The limiting slider 11 will limit the lifting plate 16 when the screen frame 2 slides up and down to prevent the lifting rack 9 from shifting during the meshing process with the third gear 8. A first connecting rod 12 is fixed on the limiting slider 11, and a third support frame 13 is installed on one end of the first connecting rod 12. A reducer 20 is fixed on one side of the first support frame 4. The output end of the reducer 20 is connected to the first gear 5, and a servo motor 3 is installed on one side of the reducer 20. The reducer 20 will reduce the speed of the output end of the servo motor 3. The third support frame 13 is connected and fixed to the screen frame 2. The output end of the servo motor 3 is connected to the reducer 20. A baffle 18 is installed on the top of the guide column 10. The baffle 18 will limit the height of the screen frame 2 to meet the work. Guide plates 19 are symmetrically installed on both sides of the screen frame 2. The first gear 5 meshes with the second gear 6, and the second gear 6 is fixed on the second connecting rod 15. The third gear 8 connected at both ends of the second connecting rod 15 can control the gear racks at both ends to rise and fall at the same time;

[0020] Specifically, when in use, first turn on the servo motor 3, the servo motor 3 drives the first gear 5 to rotate forward, and then the first gear 5 engages with the second gear 6 to drive the second connecting rod 15 to rotate, and the rotation of the second connecting rod 15 drives the third gear 8 at both ends to rotate, and then the rotating third gear 8 engages with the lifting rack 9, which drives the lifting plate 16 and the screen frame 2 to rise, and the servo motor 3 is reversed. Through the mutual cooperation of the gear rack, the lifting plate 16 and the screen frame 2 will be lowered; the lifting and lowering of the screen frame 2 will drive the limiting slider 11 to slide on the limiting guide rail of the guide column 10, thereby limiting the lifting plate 16 and preventing the lifting rack 9 from shifting during the engagement process with the third gear 8, thereby making the lifting and lowering of the screen frame 2 smooth.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A screen frame lifting structure driven by a gear rack, comprising a load-bearing beam (1), a screen frame (2), a servo motor (3), a first support frame (4), a first gear (5), a second gear (6), a second support frame (7), a third gear (8), a lifting rack (9), a guide column (10), a limit slider (11), a first connecting rod (12), a third support frame (13), a bearing seat (14), a second connecting rod (15), a lifting plate (16), a threaded rod (17), a baffle (18), a guide plate (19), a reducer (20) and a fifth support frame (21), characterized in that: A first support frame (4) is fixed on the load-bearing beam (1), a fifth support frame (21) is symmetrically mounted on the load-bearing beam (1), a second support frame (7) is mounted on the fifth support frame (21), a bearing seat (14) is fixed on one side of the second support frame (7), a second connecting rod (15) is connected to the bearing seat (14) through a bearing, a third gear (8) is fixed at both ends of the second connecting rod (15), the third gear (8) is meshed with a lifting rack (9), and the lifting rack (9 ) is connected to the threaded rod (17) by threaded fitting, the threaded rod (17) is rotatably connected to the lifting plate (16), the lifting plate (16) is fixed to the guide plate (19), a guide column (10) is fixedly installed on the top of the fifth support frame (21), a limit slide block (11) is slidably connected to the limit guide rail arranged on the guide column (10), a first connecting rod (12) is fixed to the limit slide block (11), and a third support frame (13) is installed at one end of the first connecting rod (12).

2. The rack-and-pinion driven screen frame lifting structure according to claim 1, characterized in that: A reducer (20) is fixed on one side of the first support frame (4), and a servo motor (3) is installed on one side of the reducer (20).

3. The rack-and-pinion driven screen frame lifting structure according to claim 1, characterized in that: The third support frame (13) is connected and fixed on the screen frame (2).

4. The rack-and-pinion driven screen frame lifting structure according to claim 1, characterized in that: A baffle (18) is installed on the top of the guide column (10).

5. The rack-and-pinion driven screen frame lifting structure according to claim 3, characterized in that: Guide plates (19) are symmetrically mounted on both sides of the screen frame (2).

6. The rack-and-pinion driven screen frame lifting structure according to claim 2, characterized in that: The output end of the servo motor (3) is connected to the reducer (20).

7. The rack-and-pinion driven screen frame lifting structure according to claim 6, characterized in that: The output end of the reducer (20) is connected to a first gear (5), the first gear (5) is meshed with a second gear (6), and the second gear (6) is fixed on a second connecting rod (15).

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