Workbench convenient for split charging

Abstract

The utility model discloses a work table convenient for split charging, which relates to the work table technical field, and comprises a work table top, the top end of the work table top is fixedly connected with a control terminal, the bottom end of the work table top is fixedly connected with an electronic scale body, the electronic scale body is electrically connected with the control terminal, and the top end of the work table top is provided with a round opening. A packaging bag is placed at the inner bottom end of the electronic scale body, and the top end of the packaging bag penetrates through the round opening. The material storage frame is driven by the lifting air cylinder to be in butt joint with a packaging bag, discharging and bagging are carried out, manual taking and bagging are not needed, and operation is easy and convenient; meanwhile, the discharging opening and closing mechanism is matched with the electronic scale body, the discharged food can be intermittently and orderly opened and closed, packaging bags are driven to be quantitatively packaged, operation is easy and fast, and the subpackaging efficiency is high; and moreover, the lifting adjusting mechanism can drive the working table top to adjust the height, so that the device is suitable for sub-packaging personnel with different heights, the sub-packaging work comfort is improved, and the work fatigue feeling is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of workbench technology, and in particular relates to a workbench that is easy to pack. Background Technology

[0002] A workbench is a platform used for manual operations, assembly, repair, experimentation, or other types of work. Workbenches that facilitate sorting and packaging are used in industries such as logistics, manufacturing, retail, and warehousing to improve the efficiency of sorting, picking, and packaging.

[0003] For example, CN209582114U discloses a workbench for easy packaging. It includes a worktable surface and a support frame. Multiple circular holes are formed on the worktable surface, and a cylinder is installed below each hole. An electronic scale is mounted on the side of the cylinder, and the electronic scale is installed directly below the cylinder via a telescopic rod. A clamping device is installed around the periphery of the cylinder, consisting of a vertical rod and a swing arm. The upper end of the vertical rod is fixed to the lower surface of the worktable surface. One end of the swing arm is fixed to the middle of the vertical rod via a pivot, and the other end of the swing arm is fixed with a clamping block. The middle of the swing arm is fixedly connected to one end of a spring, and the other end of the spring is fixed to the upper part of the vertical rod. This utility model has a simple structure and is easy to use. By adding an electronic scale to the workbench, weighing is performed simultaneously with bagging, shortening processing steps and effectively improving work efficiency.

[0004] The above-mentioned patent has the following defects in use:

[0005] When food is being packaged, the food is poured onto a workbench, where packaging personnel at various workstations pick it up and bag it. During this process, packaging personnel generally prioritize packaging nearby food items first, and only retrieve items further away after finishing those nearby. This packaging operation is quite cumbersome. Moreover, in actual use, due to the different heights and builds of the packaging personnel, and the fixed height of the workbench, it is difficult to accommodate packaging personnel of different heights and builds. This results in inconvenience in retrieving food, and some personnel sometimes need to get up and walk around to retrieve it, which is time-consuming, laborious, increases work fatigue, and reduces packaging efficiency. Therefore, this utility model proposes a workbench that facilitates packaging. Utility Model Content

[0006] This utility model provides a convenient workbench for dispensing and packaging. A lifting cylinder drives a storage frame to connect with packaging bags for unloading and bagging, eliminating the need for manual handling and making the process easy and convenient. Simultaneously, a feeding opening and closing mechanism, in conjunction with an electronic scale, allows for intermittent and orderly opening and closing of the unloaded food, enabling quantitative packaging of the bags. The operation is simple, fast, and efficient. Furthermore, the lifting adjustment mechanism allows for height adjustment of the workbench surface, accommodating packaging personnel of different heights, improving comfort and reducing fatigue. In summary, this invention solves the problems in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model provides a workbench for easy repackaging, comprising:

[0009] The workbench has a control terminal fixedly connected to its top end and an electronic scale body fixedly connected to its bottom end. The electronic scale body is electrically connected to the control terminal. A round opening is cut into the top end of the workbench. A packaging bag is placed inside the bottom end of the electronic scale body, and the top end of the packaging bag passes through the round opening and extends to its top.

[0010] The storage box and the feeding opening and closing mechanism are both located on the top of the workbench, and the feeding opening and closing mechanism is used to control the opening and closing of the food feeding inside the storage box.

[0011] A lifting adjustment mechanism is provided at the bottom of the worktable and is used to control the height adjustment of the worktable.

[0012] The feeding and opening / closing mechanism includes a baffle plate disposed inside the storage frame. The inner wall of the storage frame has a rectangular opening, and the outer wall of the baffle plate is in close contact with the inner wall of the rectangular opening. A sealing plate is fixedly connected to one side of the baffle plate, and one side of the sealing plate is in close contact with one side of the storage frame. Two pairs of round rods are fixedly connected to one side of the storage frame. Two pairs of sleeve holes are drilled on one side of the sealing plate, and the sealing plate is fitted between the outer walls of the two pairs of round rods through the two pairs of sleeve holes. A fixing plate is fixedly connected between the ends of the two pairs of round rods away from the storage frame, and a telescopic cylinder is fixedly connected between the opposite sides of the fixing plate and the sealing plate. The telescopic cylinder is electrically connected to a control terminal. Springs are fitted on the outer walls of the two pairs of round rods, and the two ends of the springs are fixedly connected to the opposite sides of the fixing plate and the sealing plate, respectively.

[0013] Furthermore, two pairs of limiting rods are fixedly connected to the top of the workbench, and two pairs of loops are fixedly connected to the outer wall of the packaging bag, with the loops being looped onto the outer wall of the limiting rods.

[0014] Furthermore, a sealing plug is fitted on the top of the storage frame, and the outer wall of the sealing plug is in close contact with the inner wall of the storage frame, and the storage frame is transparent.

[0015] Furthermore, the end of the baffle away from the sealing plate is triangular, and a scraper is fixedly connected to the inner wall of the storage frame, with the bottom end of the scraper in contact with the top end of the baffle. The top end of the scraper is arc-shaped, and the bottom end of the scraper is triangular.

[0016] Furthermore, side plates are fixedly connected to both sides of the storage frame, and lifting cylinders are fixedly connected between the bottom end of a pair of side plates and the top end of the workbench.

[0017] Furthermore, the lifting and adjusting mechanism includes two pairs of electric telescopic rods. The top ends of both pairs of electric telescopic rods are fixedly connected to the bottom end of the worktable. A base plate is fixedly connected between the bottom ends of each pair of electric telescopic rods. A pair of movable inclined rods are provided on the top of each pair of base plates. Connecting pieces are rotatably connected to the outer walls of the movable inclined rods near the top and bottom via a rotating shaft and bearing. A pair of sliding blocks are slidably connected to the top of the base plate. The top ends of the two pairs of connecting pieces at the top are fixedly connected to the bottom end of the worktable. The bottom ends of the two pairs of connecting pieces at the bottom are respectively fixedly connected to the top ends of a pair of sliding blocks. A pair of self-locking universal wheels are fixedly connected to the bottom of each pair of base plates.

[0018] Furthermore, each of the top ends of the pair of base plates is chiseled with a groove, and the bottom ends of the pair of sliding blocks are located in the groove and slidably connected thereto.

[0019] The present invention has the following advantages over the prior art:

[0020] The storage box and feeding opening and closing mechanism in this utility model can drive food directly into the packaging bag through the storage box, eliminating the need to pour it onto the workbench for picking and bagging, reducing operational hassle. At the same time, in conjunction with the weighing of the electronic scale, it can promptly drive the baffle plate to stop or guide the feeding channel of the storage box, so as to facilitate the quantitative packaging of food into the packaging bag. The entire dispensing operation is easy and convenient, effectively improving dispensing efficiency.

[0021] The lifting cylinder in this invention can adjust the height of the storage frame so that it can align with the packaging bag when moving downwards, allowing the food to be fully fed into the bag and preventing splashing onto the workbench during the feeding process. When moving upwards, it facilitates the removal and replacement of the packaging bag.

[0022] The lifting and adjusting mechanism in this invention can drive the worktable to move up and down, so as to adjust it to a suitable height according to the height of different packaging workers. It is suitable for packaging workers of different heights, improves the comfort of packaging work, and reduces work fatigue.

[0023] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of a workbench for easy assembly according to the present invention;

[0026] Figure 2 This is a partial cross-sectional view of a workbench for easy assembly according to the present invention;

[0027] Figure 3 In this utility model Figure 2 Enlarged structural diagram at point A;

[0028] Figure 4 This is a partial cross-sectional structural diagram of the material storage frame, sealing plug, and material feeding opening and closing mechanism in this utility model;

[0029] Figure 5 In this utility model Figure 4 Enlarged structural diagram at point B;

[0030] Figure 6 This is a partial cross-sectional structural diagram of the worktable and lifting adjustment mechanism in this utility model.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Workbench; 2. Control terminal; 3. Electronic scale body; 4. Packaging bag; 401. Limiting rod; 402. Loop; 5. Storage frame; 6. Sealing plug; 7. Feeding opening and closing mechanism; 701. Baffle plate; 702. Sealing plate; 703. Round rod; 704. Fixing plate; 705. Telescopic cylinder; 706. Spring; 707. Scraper; 8. Side plate; 9. Lifting cylinder; 10. Lifting adjustment mechanism; 1001. Electric telescopic rod; 1002. Movable diagonal rod; 1003. Connecting piece; 1004. Sliding block; 1005. Slide groove; 11. Base plate; 12. Self-locking casters. Detailed Implementation

[0033] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Specific Implementation Example 1:

[0036] Please see Figures 1-5 As shown, the present invention provides a workbench for easy dispensing, comprising:

[0037] Workbench 1, with a control terminal 2 fixedly connected to the top of the workbench 1 and an electronic scale body 3 fixedly connected to the bottom of the workbench 1. The electronic scale body 3 is electrically connected to the control terminal 2. A round opening is cut at the top of the workbench 1. A packaging bag 4 is placed at the bottom of the inner part of the electronic scale body 3, and the top of the packaging bag 4 passes through the round opening and extends to its top.

[0038] The storage box 5 and the feeding opening and closing mechanism 7 are both located on the top of the workbench 1, and the feeding opening and closing mechanism 7 is used to control the opening and closing of the food feeding inside the storage box 5.

[0039] The lifting adjustment mechanism 10 is located at the bottom of the worktable 1 and is used to control the height adjustment of the worktable 1.

[0040] The material feeding and opening / closing mechanism 7 includes a baffle plate 701 disposed inside the storage frame 5. A rectangular opening is formed in the inner wall of the storage frame 5, and the outer wall of the baffle plate 701 is in close contact with the inner wall of the rectangular opening. A sealing plate 702 is fixedly connected to one side of the baffle plate 701, and one side of the sealing plate 702 is in close contact with one side of the storage frame 5. Two pairs of round rods 703 are fixedly connected to one side of the storage frame 5. Two pairs of sleeve holes are formed in one side of the sealing plate 702. Two pairs of round rods 703 are fitted between the outer walls of the two pairs of round rods 703 through two pairs of holes. A fixing plate 704 is fixedly connected between the ends of the two pairs of round rods 703 away from the storage frame 5. A telescopic cylinder 705 is fixedly connected between the opposite sides of the fixing plate 704 and the sealing plate 702. The telescopic cylinder 705 is electrically connected to the control terminal 2. A spring 706 is fitted on the outer wall of each pair of round rods 703. The two ends of the spring 706 are fixedly connected to the opposite sides of the fixing plate 704 and the sealing plate 702, respectively.

[0041] In the specific implementation process, food is added to the storage box 5 for feeding, so that the food falls into the packaging bag 4. At the same time, the electronic scale body 3 weighs it in real time. When the total weight of the packaging bag 4 and the bagged food reaches the quantitative standard, the feedback is sent to the control terminal 2, which drives the telescopic cylinder 705 to extend, pushing the sealing plate 702 along the two pairs of round rods 703 towards the storage box 5, so that the baffle plate 701 extends into the storage box 5 to stop the feeding of food, making it convenient for the packaging staff to take away the full packaging bag 4 and replace it with a new packaging bag 4. Then, the telescopic cylinder 705 drives the baffle plate 701 to reset through the sealing plate 702, removing the obstruction to the feeding of food, allowing the food to continue to be fed. Compared with the method of pouring the food onto the workbench 1 and then picking it up and bagging it, it is easier and more convenient, saves time and effort, reduces operation troubles, and improves packaging efficiency.

[0042] Two pairs of limiting rods 401 are fixedly connected to the top of the workbench 1, and two pairs of ropes 402 are fixedly connected to the outer wall of the packaging bag 4, with the ropes 402 sleeved on the outer wall of the limiting rods 401.

[0043] By attaching the rope 402 to the outer wall of the limiting rod 401, the packaging bag 4 can be fixed in place to facilitate subsequent quantitative filling.

[0044] The top of the storage frame 5 is fitted with a sealing plug 6, and the outer wall of the sealing plug 6 is in close contact with the inner wall of the storage frame 5. The storage frame 5 is transparent.

[0045] With the sealing plug 6, after the material is filled into the storage box 5, the top of the storage box 5 is sealed, so that dust and impurities are not easy to enter the storage box 5 and avoid contaminating the food. In addition, the storage box 5 is transparent, which allows the packaging staff to observe the storage amount of food inside the storage box 5 in real time.

[0046] The baffle plate 701 is triangular at the end away from the sealing plate 702. The inner wall of the storage frame 5 is fixedly connected to a scraper 707, and the bottom end of the scraper 707 is in contact with the top end of the baffle plate 701. The top end of the scraper 707 is arc-shaped, and the bottom end of the scraper 707 is triangular.

[0047] By setting the end of the baffle plate 701 away from the sealing plate 702 to be triangular, the contact between the baffle plate 701 and the food can be reduced and sealed when the food is stopped inside the storage frame 5, so as to block and seal the feeding channel inside the storage frame 5. The scraper 707 can scrape off the food on the top of the baffle plate 701 when the baffle plate 701 moves outward to reset, and the top of the scraper 707 is arc-shaped, which makes it less likely for food to remain on the scraper 707, thus promoting the full feeding of food.

[0048] The storage box 5 has side plates 8 fixedly connected to both sides, and a lifting cylinder 9 is fixedly connected between the bottom of the pair of side plates 8 and the top of the workbench 1.

[0049] With the lifting cylinder 9 in place, during the feeding and dispensing process, the lifting cylinder 9 drives the storage frame 5 downward through the side plate 8, so that the bottom of the storage frame 5 is flush with the top of the packaging bag 4, so that the food can fall fully into the packaging bag 4 and is less likely to splash onto the workbench 1. After quantitative dispensing, when it is necessary to drive the full packaging bag 4 to discharge, the lifting cylinder 9 drives the storage frame 5 upward through the side plate 8, so as to avoid obstructing the removal and replacement of the packaging bag 4. Specific Implementation Example 2:

[0051] Please see Figure 1 and Figure 6 As shown, in a preferred embodiment, the lifting adjustment mechanism 10 includes two pairs of electric telescopic rods 1001. The top ends of both pairs of electric telescopic rods 1001 are fixedly connected to the bottom end of the worktable 1. A base plate 11 is fixedly connected between the bottom ends of a pair of electric telescopic rods 1001. A pair of movable inclined rods 1002 are provided on the top of each pair of base plates 11. Connecting pieces 1003 are rotatably connected to the outer walls of the movable inclined rods 1002 near the top and bottom via a rotating shaft and bearing. A pair of sliding blocks 1004 are slidably connected to the top of the base plate 11. The top ends of the two pairs of connecting pieces 1003 at the top are fixedly connected to the bottom end of the worktable 1. The bottom ends of the two pairs of connecting pieces 1003 at the bottom are respectively fixedly connected to the top ends of a pair of sliding blocks 1004. A pair of self-locking casters 12 are fixedly connected to the bottom ends of each pair of base plates 11.

[0052] In the specific implementation process, the two pairs of electric telescopic rods 1001 drive the worktable 1 to move up and down. At the same time, the movable diagonal rods 1002 move synchronously towards or away from each other with the worktable 1, assisting the up and down movement of the worktable 1 and enabling the worktable 1 to be stably adjusted in height. This allows it to be adjusted to a suitable height according to the height of different packing workers, making it suitable for packing workers of different heights, improving the comfort of packing work, reducing work fatigue, and enabling the self-locking universal wheels 12 to move the worktable 1 easily, improving the flexibility of use, and also facilitating docking with other worktables 1.

[0053] Among them, the top of each pair of base plates 11 is carved with a groove 1005, and the bottom of each pair of sliding blocks 1004 is located in the groove 1005 and is slidably connected to it.

[0054] By sliding the slider 1004 in the groove 1005, the movement of the movable diagonal rod 1002 can be assisted by sliding, so that it can maintain stable movement.

[0055] The circuits, electronic components, and chip modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0056] All standard parts used in the application documents can be purchased from the market. All components in this application document can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The electrical components mentioned in this document are all electrically connected to the external main controller and power supply, and the main controller is a conventional known device that can play a control role.

[0057] The working principle of this utility model is as follows:

[0058] In use, this utility model firstly involves two pairs of electric telescopic rods 1001 driving the worktable 1 to move up and down. Simultaneously, the movable inclined rods 1002 move synchronously towards or away from the worktable 1, assisting in its vertical movement. The height is adjusted to suit the height of different packaging workers. Next, the lifting cylinder 9, via the side connecting plate 8, drives the storage frame 5 downwards, aligning the bottom of the storage frame 5 with the top of the packaging bag 4. Food is then added to the storage frame 5, and after addition, the sealing plug 6 is closed. Then, the telescopic cylinder 705 pulls the sealing plate 702 along the two pairs of round rods 703 towards the fixed plate 704, causing the baffle plate 701 to move out of the storage frame 5, removing the obstruction to food feeding and allowing the food to be dispensed. The contents of the packaging bag 4 are simultaneously weighed in real time by the electronic scale 3. Once the total weight of the packaging bag 4 and the bagged food reaches the quantitative standard, feedback is sent to the control terminal 2, which in turn drives the telescopic cylinder 705 to extend, pushing the sealing plate 702 along the two pairs of round rods 703 toward the storage frame 5. This causes the baffle plate 701 to extend into the storage frame 5, stopping the food from being fed. Next, the lifting cylinder 9 drives the storage frame 5 upward through the side plate 8. The packaging staff removes the full packaging bag 4 and replaces it with a new one. The rope 402 is then placed on the outer wall of the limit rod 401 to secure the packaging bag 4. Finally, the telescopic cylinder 705 drives the baffle plate 701 to reset through the sealing plate 702, removing the obstruction to the food and allowing the food to continue being fed.

[0059] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A workbench facilitating sub-packaging, characterized in that, Include: Workbench (1), the top end of the workbench (1) is fixedly connected with a control terminal (2), and the bottom end of the workbench (1) is fixedly connected with an electronic scale body (3), the electronic scale body (3) is electrically connected with the control terminal (2), the top end of the workbench (1) is drilled with a round mouth, the inner bottom end of the electronic scale body (3) is placed with a packaging bag (4), and the top end of the packaging bag (4) passes through the round mouth and extends to the top thereof; The storage frame (5) and the blanking opening and closing mechanism (7) are arranged on the top of the workbench (1), and the blanking opening and closing mechanism (7) is used for controlling the opening and closing of the food discharge in the storage frame (5); The lifting adjusting mechanism (10) is arranged on the bottom of the workbench (1), and the lifting adjusting mechanism (10) is used for controlling the height adjustment of the workbench (1); Wherein, the blanking opening and closing mechanism (7) includes a blocking plate (701) arranged in the storage frame (5), a rectangular opening is drilled in the inner wall of the storage frame (5), and the outer wall of the blocking plate (701) is in close contact with the inner wall of the rectangular opening, one side of the blocking plate (701) is fixedly connected with a sealing plate (702), one side of the sealing plate (702) is in close contact with one side of the storage frame (5), one side of the storage frame (5) is fixedly connected with two pairs of circular rods (703), one side of the sealing plate (702) is drilled with two pairs of sleeve holes, the sealing plate (702) is sleeved between the outer walls of the two pairs of circular rods (703) through the two pairs of sleeve holes, the ends of the two pairs of circular rods (703) away from the storage frame (5) are fixedly connected with a fixed plate (704), the fixed plate (704) and the sealing plate (702) are fixedly connected with a telescopic air cylinder (705) between the opposite sides, the telescopic air cylinder (705) is electrically connected with the control terminal (2), the outer walls of the two pairs of circular rods (703) are sleeved with springs (706), and the two ends of the spring (706) are fixedly connected with the fixed plate (704) and the sealing plate (702) on the opposite sides.

2. The workbench of claim 1, wherein, The top end of the workbench (1) is fixedly connected with two pairs of limiting rods (401), the outer wall of the packaging bag (4) is fixedly connected with two pairs of sleeve ropes (402), and the sleeve ropes (402) are sleeved on the outer wall of the limiting rod (401).

3. The workbench of claim 1, wherein, The top of the storage frame (5) is sleeved with a sealing plug (6), and the outer wall of the sealing plug (6) is in close contact with the inner wall of the storage frame (5), and the storage frame (5) is transparent.

4. The workbench of claim 1, wherein, The end of the blocking plate (701) away from the sealing plate (702) is triangularly arranged, the inner wall of the storage frame (5) is fixedly connected with a scraper (707), the bottom end of the scraper (707) is in contact with the top end of the blocking plate (701), the top end of the scraper (707) is arcuately arranged, and the bottom end of the scraper (707) is triangularly arranged.

5. The workbench of claim 1, wherein, The two sides of the storage frame (5) are fixedly connected with side connecting plates (8), and the bottom end of one pair of side connecting plates (8) and the top end of the workbench (1) are fixedly connected with a lifting air cylinder (9).

6. The workbench of claim 1, wherein, The lifting adjusting mechanism (10) includes two pairs of electric telescopic rods (1001), the top ends of the two pairs of electric telescopic rods (1001) are fixedly connected with the bottom end of the table top (1), the bottom ends of one pair of electric telescopic rods (1001) are fixedly connected with the bottom plate (11), the top of one pair of the bottom plate (11) is equipped with a pair of movable inclined rods (1002), the outer wall of the movable inclined rod (1002) is rotatably connected with the connecting piece (1003) through the rotating shaft and the bearing near the top and the bottom, the top end of the bottom plate (11) is slidably connected with a pair of sliding blocks (1004), the top ends of the two pairs of connecting pieces (1003) located at the top are fixedly connected with the bottom end of the table top (1), the bottom ends of the two pairs of connecting pieces (1003) located at the bottom are fixedly connected with the top ends of a pair of sliding blocks (1004) respectively, and the bottom end of one pair of the bottom plate (11) is fixedly connected with a pair of self-locking universal wheels (12).

7. A workbench for facilitating sub-packaging according to claim 6, wherein, The top end of one pair of the bottom plate (11) is excavated with a sliding groove (1005), and the bottom end of one pair of the sliding blocks (1004) is located in the sliding groove (1005) and is slidably connected with the sliding groove (1005).

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