A clean bench with adjustable lifting

Abstract

The utility model relates to clean workstation technical field, concretely is a kind of clean workstation of adjustable lifting, including bottom plate, the top of bottom plate is fixed with two front columns and two rear columns and evenly distributes, front column is slidably connected with front lifting rod, rear column is slidably connected with rear lifting rod, this clean workstation of adjustable lifting, by setting the mechanical type one-way locking mechanism that is made of ratchet assembly, gear and toothed rail in front column, the mechanism allows cylinder driving platform normal to rise, but can immediately automatically lock at any height, prevent the unexpected falling of platform due to cylinder failure or other reasons, thoroughly solve the security risk that the existing equipment exists, provide the vital safety protection for operator, by simple push sleeve action, first toothed rail can be driven to move, thereby gear transmission forces ratchet assembly to separate from self-locking state, realize quick, easy unlocking.

Description

Technical Field

[0001] This utility model relates to the field of clean bench technology, specifically a clean bench with adjustable height. Background Technology

[0002] A clean bench is an air purification device that provides a localized dust-free and sterile working environment. It can control the emission of contaminated air from the work area through a dedicated filtration channel, avoiding harm to people and the environment. It is a safe clean bench specifically for microorganisms and can also be widely used in biological laboratories, medical and health care, biopharmaceutical and other related industries. It has a good effect on improving process conditions, protecting the health of operators, and improving product quality and yield.

[0003] Existing clean benches typically have height adjustment functions, but when their lifting components are damaged, the lack of a locking structure may cause the work surface to fall. Existing locking structures are complicated to operate, time-consuming and labor-intensive. To address the above problems, this application designs a clean bench with adjustable height. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, this utility model provides a clean workbench with adjustable height.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a height-adjustable clean workbench, comprising a base plate, two front columns and two rear columns evenly distributed and fixed to the top of the base plate, a front lifting rod slidably connected to the front columns, and a rear lifting rod slidably connected to the rear columns, with a tabletop fixed to the top of the front and rear lifting rods, a cylinder mounted on the top of the base plate, the output end of the cylinder fixed to the bottom of the tabletop, a frame fixed to the top of the tabletop, and a purification device mounted on the frame, the front and rear columns respectively sleeved on the front and rear lifting rods, and a slot formed in the front column, the interior of which is connected to... The front column is internally connected. A fixed plate is fixed on the slot. A first gear is rotatably connected to the fixed plate on one side of the slot. A swing arm is provided on the other side of the fixed plate. The swing arm passes through the fixed plate and is fixedly connected to the first gear. A ratchet assembly is fixed at the bottom of the swing arm. The fixed end of the ratchet assembly is connected to the swing arm. A second gear is fixed at the movable end of the ratchet assembly. A second gear is fixed on the front lifting rod. The second gear meshes with the second gear. A sleeve is sleeved and slidably connected to the front column at the slot position. A first gear is fixed inside the sleeve. The first gear is located at the slot position and meshes with the first gear.

[0008] To prevent the sleeve from loosening up and down with the first toothed rail, the present invention is improved by fixing two vertical rods in the slot, the vertical rods passing through the first toothed rail and slidably connected to it, and a spring being sleeved on the vertical rods above the first toothed rail.

[0009] To achieve a fixed position for the sleeve, this invention includes the following improvements: magnetic blocks are provided on both the inner sidewall of the sleeve near the top and the outer wall of the front column, and the two magnetic blocks can attract each other and be in relative positions.

[0010] To improve structural strength, this utility model is improved by providing positioning columns inside both the front and rear columns. The positioning columns pass through and are slidably connected to the front and rear lifting rods. Triangular structural blocks are welded and fixed at the connection points between the front and rear lifting rods and the platform.

[0011] To facilitate centralized operation and control, this utility model is improved by providing a control panel on the purification device, which is connected to the cylinder.

[0012] To prevent the base plate from deforming under stress, this utility model is improved by fixing a metal reinforcing rib to the top of the base plate.

[0013] To prevent slippage, the present invention is improved by providing anti-slip stripes on the front end of the outer wall of the sleeve.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a height-adjustable clean workbench, which has the following beneficial effects:

[0016] This height-adjustable clean bench features a mechanical one-way locking mechanism in its front column, consisting of a ratchet assembly, gears, and a toothed rail. This mechanism allows the cylinder to drive the bench to rise normally, but it can automatically lock at any height immediately, preventing the bench from falling accidentally due to cylinder failure or other reasons. This completely solves the safety hazards of existing equipment and provides crucial safety protection for operators. By simply pushing the sleeve upwards, the first toothed rail can be moved, thereby forcing the ratchet assembly to disengage from its self-locking state through gear transmission, achieving quick and easy unlocking. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first main view structure of this utility model;

[0018] Figure 2 This is a side view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the first partial structure of the present invention;

[0020] Figure 4 This is a second partial structural schematic diagram in cross-section of the present invention;

[0021] Figure 5 This is a schematic diagram of the third part of the structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the fourth partial structure of the present utility model;

[0023] Figure 7 This is a fifth partial structural schematic diagram of the present invention in cross-section.

[0024] In the diagram: 1. Base plate; 2. Front column; 3. Rear column; 4. Front lifting rod; 5. Rear lifting rod; 6. Tabletop; 7. Cylinder; 8. Frame; 9. Purification device; 10. Slot; 11. Fixed plate; 12. First gear; 13. Swing arm; 14. Ratchet assembly; 15. Second gear; 16. Second gear rail; 17. Sleeve; 18. First gear rail; 19. Vertical rod; 20. Spring; 21. Magnetic block; 22. Positioning post; 23. Triangular structural block; 24. Control panel; 25. Metal reinforcing rib. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-7An adjustable-height clean workbench includes a base plate 1. Two front columns 2 and two rear columns 3 are evenly distributed and fixed to the top of the base plate 1. A front lifting rod 4 is slidably connected to the front columns 2, and a rear lifting rod 5 is slidably connected to the rear columns 3. A tabletop 6 is fixed to the top of the front and rear lifting rods 4 and 5. A cylinder 7 is installed at the top of the base plate 1, and the output end of the cylinder 7 is fixed to the bottom of the tabletop 6. A frame 8 is fixed to the top of the tabletop 6, and a purification device 9 is mounted on the frame 8. The front columns 2 and rear columns 3 are respectively fitted onto the front and rear lifting rods 4 and 5. A slot 10 is formed in the front column 2, and the interior of the slot 10 communicates with the interior of the front column 2. A fixed plate 11 is fixed to the slot 10. A first gear 12 is rotatably connected to the fixed plate 11 on one side of the slot 10. A swing arm 13 is provided on the other side of the fixed plate 11. The swing arm 13 passes through the fixed plate 11 and is fixedly connected to the first gear 12. A ratchet assembly 14 is fixed at the bottom of the swing arm 13. The fixed end of the ratchet assembly 14 is connected to the swing arm 13. A second gear 15 is fixed at the movable end of the ratchet assembly 14. A second gear 16 is fixed on the front lifting rod 4. The second gear 16 meshes with the second gear 15. A sleeve 17 is sleeved and slidably connected to the front column 2 at the slot 10 position. A first gear 18 is fixed inside the sleeve 17. The first gear 18 is located at the slot 10 position and meshes with the first gear 12.

[0027] In use, the purification device 9 utilizes existing mature technology, such as the purification device 9 in the SW-CJ-2FD model. The ratchet assembly 14 also utilizes existing mature technology, such as a DT planetary ratchet structure. Initially, the spring 20 pushes the first gear rail 18 and sleeve 17 downwards, at which point the swing arm 13 is in a vertically downward position, and the second gear 15 meshes with the second gear rail 16. When it is necessary to raise the height of the platform 6, the control panel 24 activates the cylinder 7, which lifts the platform 6, and the platform 6 then moves the front lifting rod 4. When the rear lifting lever 5 moves upward, the front lifting lever 4 drives the second gear 16 to move upward. The second gear 16 meshes with the second gear 15, thereby driving the second gear 15 to rotate. At the same time, the second gear 15 drives the movable end of the ratchet assembly 14 to rotate. At this time, the direction of rotation of the movable end is not the ratchet meshing direction of the ratchet assembly 14, so it will not drive the fixed end to rotate, thus not affecting the upward movement of the front lifting lever 4. When it reaches the designated height, the cylinder 7 stops. If the cylinder 7 is damaged, the platform 6 will fall downward, and the front lifting lever 4 will drive the second gear 16 downward. When the movement occurs, the second gear 15 will rotate in the opposite direction, simultaneously causing the movable end of the ratchet assembly 14 to rotate in the opposite direction. At this time, the movable end engages with the fixed end under the action of the ratchet, while the fixed end is fixed to the swing arm 13. This reverse action prevents the second gear 15 from rotating, thus hindering the downward movement of the second gear rail 16 and the front lifting rod 4, preventing the platform 6 from falling. When the cylinder 7 is working normally, the platform 6 needs to be lowered. Before starting the cylinder 7, the sleeve 17 is pulled upward along the front column 2. The sleeve 17 drives the first gear rail 18 to move upward. When the spring 20 is compressed, the first gear 18 meshes with the first gear 12, thereby driving the first gear 12 to rotate. The first gear 12 drives the swing arm 13 to swing. The swing arm 13 drives the ratchet assembly 14 and the second gear 15 to swing away from the second gear 16, so that the second gear 15 and the second gear 16 no longer mesh. This allows the second gear 16 to get rid of the ratchet's restriction, so that the front lifting rod 4 and the second gear 16 continue to descend. At this time, the two magnetic blocks 21 contact and achieve a magnetic attraction effect, where the magnetic attraction force is greater than the elastic force of the spring 20.

[0028] In actual use, it was found that the sleeve 17 and the first toothed rail 18 would sway up and down along the front column 2. In order to avoid the above problem, in this embodiment, two vertical rods 19 are fixed in the slot 10. The vertical rods 19 pass through the first toothed rail 18 and are slidably connected to it. A spring 20 is sleeved on the vertical rods 19 above the first toothed rail 18.

[0029] In actual use, it was found that after moving the sleeve 17 upward, the operator needs to hold it in place, which is inconvenient. In order to solve the above problem, in this embodiment, magnetic blocks 21 are provided on the inner side wall of the sleeve 17 near the top and on the outer wall of the front column 2. The two magnetic blocks 21 can attract each other and be in relative positions.

[0030] In actual use, it was found that when the lifting component is damaged and the platform 6 is about to fall, the platform 6 is prone to tilting and shaking. In order to improve the structural strength and prevent the platform 6 from tilting, in this embodiment, positioning columns 22 are provided in both the front column 2 and the rear column 3. The positioning columns 22 pass through the front lifting rod 4 and the rear lifting rod 5 and are slidably connected to them. Triangular structural blocks 23 are welded and fixed at the connection between the front lifting rod 4 and the rear lifting rod 5 and the platform 6.

[0031] In actual use, it was found that, in order to facilitate centralized control operation, in this embodiment, the purification device 9 is provided with a control panel 24, which is connected to the cylinder 7.

[0032] In actual use, it was found that the base plate 1 may be deformed by the pressure from the front column 2 and the rear column 3 at the four corners, which may disrupt the parallel relationship between the front column 2 and the rear column 3. In order to avoid the above problems, in this embodiment, the top of the base plate 1 is fixed with a metal reinforcing rib 25.

[0033] In actual use, it was found that slippage would occur when contacting the sleeve 17. In order to avoid the above problem, in this embodiment, anti-slip stripes are provided on the front end of the outer wall of the sleeve 17.

[0034] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0035] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0036] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable clean workbench, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixed with two front columns (2) and two rear columns (3) evenly distributed. A front lifting rod (4) is slidably connected to the front column (2), and a rear lifting rod (5) is slidably connected to the rear column (3). A tabletop (6) is fixed to the top of the front lifting rod (4) and the rear lifting rod (5). A cylinder (7) is installed at the top of the base plate (1). The output end of the cylinder (7) is fixed to the bottom end of the tabletop (6). A frame (8) is fixed to the top of the tabletop (6). A purification device (9) is installed on the frame (8). The front column (2) and the rear column (3) are respectively fitted onto the front lifting rod (4) and the rear lifting rod (5). A slot (10) is opened on the front column (2). The inside of the slot (10) is connected to the inside of the front column (2). A fixed plate (11) is fixed on the slot (10). A first gear (12) is rotatably connected to one side of the slot (10). A swing arm (13) is provided on the other side of the fixed plate (11). The swing arm (13) passes through the fixed plate (11) and is fixedly connected to the first gear (12). A ratchet assembly (14) is fixed at the bottom of the swing arm (13). The fixed end of the ratchet assembly (14) is connected to the swing arm (13). A second gear (15) is fixed at the movable end of the ratchet assembly (14). A second gear (16) is fixed on the front lifting rod (4). The second gear (16) meshes with the second gear (15). A sleeve (17) is sleeved and slidably connected on the front column (2) at the slot (10). A first gear (18) is fixed inside the sleeve (17). The first gear (18) is located at the slot (10) and meshes with the first gear (12).

2. The adjustable clean workbench according to claim 1, characterized in that: Two vertical rods (19) are fixed in the slot (10). The vertical rods (19) pass through the first toothed rail (18) and are slidably connected to it. A spring (20) is sleeved on the vertical rod (19) above the first toothed rail (18).

3. The adjustable clean workbench according to claim 2, characterized in that: Magnetic blocks (21) are provided on the inner side wall of the sleeve (17) near the top and on the outer wall of the front column (2). The two magnetic blocks (21) can attract each other and be in relative positions.

4. The adjustable clean workbench according to claim 1, characterized in that: Positioning posts (22) are provided in both the front column (2) and the rear column (3). The positioning posts (22) pass through the front lifting rod (4) and the rear lifting rod (5) and are slidably connected to them. Triangular structural blocks (23) are welded and fixed at the connection between the front lifting rod (4) and the rear lifting rod (5) and the platform (6).

5. The adjustable clean workbench according to claim 1, characterized in that: The purification device (9) is equipped with a control panel (24), which is connected to the cylinder (7).

6. The adjustable clean workbench according to claim 1, characterized in that: The top of the base plate (1) is fixed with a metal reinforcing rib (25).

7. The adjustable clean workbench according to claim 1, characterized in that: The outer wall of the sleeve (17) is provided with anti-slip stripes at the front end.

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