A plate milling hole anti-warping positioning device and a plate milling hole anti-warping method

Abstract

The present application relates to the technical field of machine tool, specifically relates to a kind of plate milling hole anti-warping positioning device and plate milling hole anti-warping method, including bottom plate, positioning assembly and control component, positioning assembly includes square frame, piston, water tank and floating plate, square frame is slidably arranged in the vertical direction in the upper of bottom plate, four corners of square frame are all provided with circular through hole, piston is slidably arranged in circular through hole, control component can control piston to move, elastic telescopic rod is fixedly arranged between movable plate and piston, water tank is fixedly arranged between bottom plate and movable plate, second fixed sleeve is fixedly arranged on water tank, floating plate is slidably arranged in the inside of second fixed sleeve.The present application makes that the whole device can be suitable for the positioning work of arbitrary size plate, at the same time, it is guaranteed that the plate to be positioned will not be damaged by excessive negative pressure, at the same time, it is also unnecessary to spend time for determining the position of plate placed on the device, reduces the time spent for once plate milling work.

Description

Technical Field

[0001] This invention relates to the field of machine tool technology, specifically to a plate milling hole anti-warping positioning device and a plate milling hole anti-warping method. Background Technology

[0002] There are many types of boards, which can be classified by forming process into solid boards, plywood, fiberboard, decorative panels, fireproof boards, particleboard, etc. They can also be classified by thickness into thin boards, medium boards, thick boards, extra-thick boards, etc. Currently, many production sites use lightweight and low-cost boards, such as plastic boards and PVC-U boards. However, compared to steel boards or other technical boards, these boards are softer and require clamping and positioning during milling; otherwise, the boards may warp, preventing the milling process from proceeding properly.

[0003] Chinese patent CN218425832U discloses a plate milling and positioning device. The plate to be milled is placed on a base plate. Then, a negative pressure is generated by the cooperation of a piston and a hollow cylinder, which makes the plate adhere and fix it to the base plate. Then, an electric push rod pushes a pressure hammer to move down vertically to press the plate, thereby performing two-position positioning.

[0004] This solution requires strict determination of the plate size to ensure that the plate can fully cover the top of the empty cylinder. In this case, plates of unsuitable size will not be able to be positioned. At the same time, since the piston moves linearly directly through the drive component, the user needs to pay close attention to the piston's movement and stop it in time. Otherwise, excessive negative pressure may occur, causing the plate to break and resulting in unusable scrap. Summary of the Invention

[0005] To address the aforementioned issues, a plate milling anti-warping positioning device is provided. The device uses a base plate, a square frame, and multiple pistons to position plates of any size. An elastic telescopic rod prevents excessive negative pressure from fixing the plate. The combination of a water tank and a float plate allows the positioned plate to move into the air, thus preventing the milling machine from colliding with the base plate during milling.

[0006] To address the existing technical problems, a plate milling anti-warping positioning device is provided, comprising a base plate, a positioning assembly, and a control assembly. The positioning assembly includes a square frame, a piston, a water tank, and a float plate. The opening of the square frame faces vertically and slides vertically above the base plate. Each of the four corners of the square frame has a vertically penetrating circular through-hole. A first fixing sleeve, coaxial with the circular through-hole, is fixedly mounted on the bottom surface of the square frame. The inner diameter of the first fixing sleeve is equal to the diameter of the circular through-hole, and the first fixing sleeve can pass through the base plate. There are at least three square frames, all with unequal side lengths and their centers located at the same point. The piston slides vertically... The control assembly includes a movable plate and an elastic telescopic rod, which slide vertically inside a circular through hole. The movable plate slides vertically at the bottom of the base plate, and the elastic telescopic rod is fixed between the movable plate and the piston. The water tank is fixed between the base plate and the movable plate. A second fixed sleeve extending upwards is fixedly installed on the water tank, and the interior of the second fixed sleeve communicates with the interior of the water tank. The second fixed sleeve is coaxially fitted outside the first fixed sleeve. A float slides inside the second fixed sleeve, and the shape of the float matches the second fixed sleeve. A first fixed bar extending upwards is fixedly installed on the float, and the float moves according to the change in liquid level inside the second fixed sleeve.

[0007] Preferably, a first channel is provided inside the square frame, which connects two adjacent circular through holes. The first channel is located in the square frame away from the first fixed sleeve.

[0008] Preferably, a second fixing strip extending upward is fixedly provided on the movable plate. The second fixing strip passes through the water tank and the float in sequence. The second fixing strip is slidably engaged with both the water tank and the float. When the bottom of the piston contacts the float, the second fixing strip can drive the float to move downward in the vertical direction.

[0009] Preferably, a first movable bar is slidably arranged on the float plate, and the sliding direction of the first movable bar is parallel to the sliding direction of the float plate. There are two first movable bars and two first fixed bars, which are evenly spaced around the center of the float plate. A fixing pin is slidably arranged on the top of the first movable bar, and the sliding direction of the fixing pin is parallel to the line connecting the centers of the two first movable bars. A second fixed bar can be inserted into the interior of the first movable bar, and a fixing hole for the fixing pin to be inserted is opened at the top of the second fixed bar. A second movable bar is slidably arranged on the piston, and the sliding direction of the second movable bar is parallel to the diameter direction of the piston. When the bottom of the piston contacts the float plate, the second movable bar pushes the fixing pin to be inserted into the fixing hole.

[0010] Preferably, the fixing pin is a stepped cylindrical shape, and each first movable strip is provided with two fixing pins that are mirror-distributed, with adjacent fixing pins engaging with the same magnetic force.

[0011] Preferably, the second fixing strip has a long groove that can slide and engage with the fixing pin.

[0012] Preferably, a first limiting strip is fixedly provided on the inner wall of the second fixed sleeve, the length direction of the first limiting strip is parallel to the axis of the second fixed sleeve, and a first limiting groove is provided on the float plate to slide in cooperation with the first limiting strip.

[0013] Preferably, a second limiting strip is fixedly provided on the inner wall of the first fixed sleeve. The length direction of the second limiting strip is parallel to the axis of the first fixed sleeve. A second limiting groove is provided on the piston, which can slide and cooperate with the second limiting strip. The second movable strip is slidably disposed in the second limiting groove. A first elastic element is fixedly provided between the second movable strip and the piston. The top end of the second movable strip is configured as an inclined surface that can slide and cooperate with the second limiting groove.

[0014] Preferably, the second movable strip has a guide hole, and the piston is fixedly provided with a guide shaft that can cooperate with the guide hole. The axis of the guide shaft is parallel to the diameter direction of the piston.

[0015] Preferably, the piston further includes a sealing plug, an electromagnet, and a second elastic element. The top of the piston has a groove for the sealing plug to slide. The sealing plug slides along the axis of the piston. The electromagnet is fixedly installed at the bottom of the groove. A switch for controlling the operation of the electromagnet is fixedly installed on the base plate. The switches of the electromagnets in different square frames are different. The second elastic element is fixedly installed between the bottom of the groove and the sealing plug. A second channel is opened on the piston, which connects the groove and the outside of the piston.

[0016] The advantages of this invention compared to the prior art are:

[0017] This invention enables the positioning of plates of any size through the cooperation of a base plate, a square frame, and multiple pistons. An elastic telescopic rod prevents excessive negative pressure from affecting the plate. A water tank and a float allow the positioned plate to move into the air, preventing the milling machine from colliding with the base plate during milling. This allows the entire device to be used for positioning plates of any size while ensuring that the plate is not damaged by excessive negative pressure. Furthermore, it eliminates the need to spend time determining the plate's position on the device, reducing the time spent on each milling operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a milling hole anti-warping positioning device for sheet metal.

[0019] Figure 2 A cross-sectional view of a plate milling anti-warping positioning device Figure 1 .

[0020] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0021] Figure 4 A cross-sectional view of a plate milling anti-warping positioning device Figure 2 .

[0022] Figure 5 yes Figure 4 A magnified view of part B in the diagram.

[0023] Figure 6 yes Figure 4 A magnified view of part C in the diagram.

[0024] Figure 7 This is a three-dimensional exploded diagram of the positioning component in a plate milling anti-warping positioning device.

[0025] Figure 8 This is a 3D schematic diagram of the square frame in the positioning component.

[0026] Figure 9 This is a cross-sectional view of the piston in the positioning assembly. Figure 1 .

[0027] Figure 10 This is a cross-sectional view of the piston in the positioning assembly. Figure 2 .

[0028] The numbers on the map are:

[0029] 1-Base plate; 2-Positioning assembly; 21-Square frame; 211-Circular through hole; 212-First fixing sleeve; 213-First channel; 214-Second limiting strip; 22-Piston; 221-Second movable strip; 222-Second limiting groove; 223-First elastic element; 224-Guide hole; 225-Guide shaft; 226-Sealing plug; 227-Electromagnet; 228-Second elastic element; 229-Second channel; 23-Water tank; 231-Second fixing sleeve; 232-First limiting strip; 24-Float plate; 241-First fixing strip; 242-First movable strip; 243-Fixing pin; 244-First limiting groove; 3-Control assembly; 31-Moving plate; 32-Elastic telescopic rod; 33-Second fixing strip; 331-Fixing hole; 332-Long strip groove. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] See Figures 1-7As shown, a plate milling anti-warping positioning device includes a base plate 1, a positioning component 2, and a control component 3. The positioning component 2 includes a square frame 21, a piston 22, a water tank 23, and a float 24. The opening of the square frame 21 faces vertically and is slidably positioned above the base plate 1. Each of the four corners of the square frame 21 has a vertically penetrating circular through hole 211. A first fixing sleeve 212, coaxial with the circular through hole 211, is fixedly mounted on the bottom surface of the square frame 21. The inner diameter of the first fixing sleeve 212 is equal to the diameter of the circular through hole 211, and the first fixing sleeve 212 can pass through the base plate 1. The number of square frames 21 is at least three, all with unequal side lengths, and all with their centers at the same point. The piston 22 is slidably positioned on the bottom surface of the square frame 21. Inside the through hole 211, the control assembly 3 includes a movable plate 31 and an elastic telescopic rod 32. The movable plate 31 is slidably disposed at the bottom of the base plate 1 in a vertical direction. The elastic telescopic rod 32 is fixedly disposed between the movable plate 31 and the piston 22. The water tank 23 is fixedly disposed between the base plate 1 and the movable plate 31. A second fixed sleeve 231 extending upward is fixedly disposed on the water tank 23. The interior of the second fixed sleeve 231 communicates with the interior of the water tank 23. The second fixed sleeve 231 is coaxially sleeved on the outside of the first fixed sleeve 212. The float 24 is slidably disposed inside the second fixed sleeve 231. The shape of the float 24 matches the second fixed sleeve 231. A first fixed bar 241 extending upward is fixedly disposed on the float 24. The float 24 moves according to the change in liquid level inside the second fixed sleeve 231.

[0032] The movable plate 31 is moved to its highest point by the control component 3. At this point, the plate to be milled is placed on the base plate 1. Then, the movable plate 31 is moved vertically downward by the control component 3. The movable rod drives all the pistons 22 to move vertically downward through the elastic telescopic rod 32. Some of the pistons 22 that are fully blocked from above will stop moving after moving a certain distance downward. At this time, the elastic telescopic rod 32 on these pistons will extend. The other part of the pistons 22 that are not blocked from above will always follow the movable plate 31 downward. When the other part of the pistons 22 moves to contact the float plate 24, the other part of the pistons 22 will drive the float plate 24 to move vertically downward. The liquid level inside the second fixed sleeve 231 where the other part of the pistons 22 is located decreases, while the liquid level inside the remaining second fixed sleeves 231 increases. The liquid level inside the second fixed sleeve 231 where the liquid level increases decreases. The float 24, through the cooperation of the first fixing strip 241 and the first fixing sleeve 212, pushes the entire square frame 21 to move vertically, thereby causing the plate fixed by negative pressure to move vertically and separate from the base plate 1. At this time, the plate can be milled. Compared with the prior art, the base plate 1, square frame 21 and multiple pistons 22 of the present invention can be used to position plates of any size. The elastic telescopic rod 32 ensures that the negative pressure used to fix the plate is not too large. The cooperation of the water tank 23 and the float 24 allows the positioned plate to move into the air, thereby avoiding the milling machine from colliding with the base plate 1 during milling. Thus, the entire device can be used for positioning plates of any size, while ensuring that the positioned plate is not damaged by excessive negative pressure. At the same time, it eliminates the need to spend time determining the position of the plate on the device, reducing the time spent on milling the plate.

[0033] See Figures 2-6 As shown: A first channel 213 is provided inside the square frame 21. The first channel 213 enables two adjacent circular through holes 211 to communicate with each other. The first channel 213 is located in the square frame 21 away from the first fixed sleeve 212.

[0034] The plate to be milled is placed on the base plate 1. When there is an unobstructed circular through hole 211 in the outermost square frame 21, after the movable plate 31 moves down for a period of time, the piston 22 in the square frame 21 will have a height difference. As the piston 22 in the unobstructed circular through hole 211 continues to move and disengage, the first channel 213 is no longer obstructed, so that the four circular through holes 211 in the square frame 21 are connected. All four circular through holes 211 in the square frame 21 will be connected to the outside. The remaining piston 22 in the square frame 21 will return to the same height and continue to move down. Compared with the prior art, the first channel 213 of the present invention can only generate negative pressure when all the circular through holes 211 on the same square frame 21 are blocked, so that the liquid level inside the second fixed sleeve 231 changes more significantly.

[0035] See Figures 5-7 As shown: A second fixing strip 33 extending upward is fixedly installed on the movable plate 31. The second fixing strip 33 passes through the water tank 23 and the float plate 24 in sequence. The second fixing strip 33 is in sliding fit with both the water tank 23 and the float plate 24. When the bottom of the piston 22 contacts the float plate 24, the second fixing strip 33 can drive the float plate 24 to move downward in the vertical direction.

[0036] The piston 22, which is not obstructed at the top, will move along with the downward movement of the movable plate 31. When the piston 22 moves vertically downward and contacts the float 24, the movable plate 31 will drive the piston 22 to continue moving downward. At the same time, the movable plate 31 will also drive the float 24 to move downward. As the float 24, which is in contact with the piston 22, moves downward, the liquid level inside the second fixed sleeve 231 where it is located will decrease, thereby causing the liquid level inside the other second fixed sleeves 231 to rise. As the liquid level rises, it will push part of the square frame 21 upward through the float 24. Compared with the prior art, the movable plate 31 of the present invention drives the float 24 to move vertically downward through the second fixed bar 33, thereby ensuring that the downward movement of the movable plate 31 can drive the change of the liquid level inside the second fixed sleeve 231.

[0037] See Figures 5-7As shown: A first movable bar 242 is slidably disposed on the float 24. The sliding direction of the first movable bar 242 is parallel to the sliding direction of the float 24. There are two first movable bars 242 and two first fixed bars 241. The first movable bars 242 and the first fixed bars 241 are evenly spaced around the center of the float 24. A fixing pin 243 is slidably disposed on the top of the first movable bar 242. The sliding direction of the fixing pin 243 is parallel to the line connecting the centers of the two first movable bars 242. A second fixed bar 33 can be inserted into the interior of the first movable bar 242. A fixing hole 331 for the fixing pin 243 to be inserted is opened at the top of the second fixed bar 33. A second movable bar 221 is slidably disposed on the piston 22. The sliding direction of the second movable bar 221 is parallel to the diameter direction of the piston 22. When the bottom of the piston 22 contacts the float 24, the second movable bar 221 pushes the fixing pin 243 into the fixing hole 331.

[0038] When the bottom surface of piston 22 is not in contact with float plate 24, the second fixing bar 33 is inserted into the first movable bar 242 and contacts the inner top of the first movable bar 242. As the movable plate 31 moves downward, piston 22 will move vertically downward while maintaining a relatively stationary state with the first movable bar 242. At this time, fixing pin 243 extends to the outside of the first movable bar 242. When the bottom surface of piston 22 contacts float plate 24, the second movable bar 221 will move away from piston 22 along the diameter of piston 22. The movement of the second movable bar 221 will push fixing pin 243 into fixing hole 331. At this time, the first movable bar 242... 42 and the second fixed bar 33 are in a relatively fixed state, and the fixing pin 243 will contact the upper surface of the float 24. At this time, the moving plate 31 will move down and drive the float 24 to move down in the vertical direction. The liquid level inside the second fixed sleeve 231 where the float 24 is located will decrease. Compared with the prior art, the first moving bar 242, the fixing pin 243, the fixing hole 331 and the second moving bar 221 of the present invention enable the first moving bar 242 and the second fixed bar 33 to switch between a relatively sliding state and a relatively fixed state, thereby ensuring that only the float 24 corresponding to the piston 22 that does not generate negative pressure can move down with the moving plate 31.

[0039] See Figures 5-6 As shown: the fixing pin 243 is a stepped cylindrical shape, and each first movable strip 242 is provided with two fixing pins 243 distributed in a mirror image. Adjacent fixing pins 243 are magnetically engaged with each other.

[0040] When the bottom surface of the piston 22 is not in contact with the float 24, the two fixing pins 243 inside the first movable bar 242 will reach the maximum distance between them through the interaction of opposite magnetic forces. At this time, the two fixing pins 243 inside the same first movable bar 242 will simultaneously disengage from the corresponding fixing holes 331, and this state will not change as the second fixing bar 33 moves. Compared with the prior art, the present invention limits the relative position of the two fixing pins 243 inside the same first movable bar 242 for a certain period of time, thereby ensuring that the fixing pins 243 will not be inserted into the fixing holes 331 when they are not in contact with the second movable bar 221.

[0041] See Figures 7-8 As shown: The second fixing strip 33 has a long groove 332 that can slide with the fixing pin 243.

[0042] When the second fixed bar 33 slides relative to the first movable bar 242, the fixing pin 243 will slide continuously in the long groove 332. Compared with the prior art, the long groove 332 of the present invention slides and the fixing pin 243 in a sliding fit, thereby ensuring that the fixing pin 243 that is not inserted into the fixing hole 331 will not affect the movement of the second fixed bar 33.

[0043] See Figures 7-8 As shown: A first limiting strip 232 is fixedly provided on the inner wall of the second fixed sleeve 231. The length direction of the first limiting strip 232 is parallel to the axis of the second fixed sleeve 231. A first limiting groove 244 is provided on the float plate 24 to slide and cooperate with the first limiting strip 232.

[0044] When the float 24 slides along the axial direction in the second fixed sleeve 231, the first limiting strip 232 and the first limiting groove 244 engage in sliding cooperation. Compared with the prior art, the first limiting strip 232 and the first limiting groove 244 of the present invention limit the state of the float 24, thereby ensuring that the float 24 does not rotate when it moves.

[0045] See Figures 7-10 As shown: A second limiting strip 214 is fixedly provided on the inner wall of the first fixed sleeve 212. The length direction of the second limiting strip 214 is parallel to the axis through which the first fixed sleeve 212 passes. A second limiting groove 222 is provided on the piston 22, which can slide and cooperate with the second limiting strip 214. The second movable strip 221 is slidably provided in the second limiting groove 222. A first elastic element 223 is fixedly provided between the second movable strip 221 and the piston 22. The top end of the second movable strip 221 is set as an inclined surface that can slide and cooperate with the second limiting groove 222.

[0046] When the bottom surface of piston 22 is not in contact with float plate 24, the second limiting strip 214 engages in the second limiting groove 222, and the second limiting strip 214 contacts the second movable strip 221, placing it near the center of piston 22. The first elastic element 223 is compressed at this time. Subsequently, piston 22 moves vertically downwards with the movement of movable plate 31. When the bottom surface of piston 22 contacts float plate 24, the second limiting strip 214 disengages from the second limiting groove 222, and the first elastic element 223 releases its elastic force, pushing the second movable strip 221 along the diameter of piston 22. As the piston 22 moves away from its center, the second movable strip 221 pushes the fixing pin 243 to move. When the piston 22 moves upward, the inclined surface of the second movable strip 221 contacts the second limiting strip 214, causing it to move closer to the center of the piston 22 along the diameter direction of the piston 22. Compared with the prior art, the second limiting strip 214, the second movable strip 221 and the first elastic member 223 of the present invention cooperate to enable the second movable strip 221 to move horizontally back and forth, thereby ensuring that the piston 22, which has disengaged from the first fixing sleeve 212, can re-enter the first fixing sleeve 212.

[0047] See Figure 9 As shown: a guide hole 224 is provided on the second movable bar 221, and a guide shaft 225 that can cooperate with the guide hole 224 is fixedly provided on the piston 22. The axis of the guide shaft 225 is parallel to the diameter direction of the piston 22.

[0048] When the inclined surface of the second movable bar 221 contacts the second limiting bar 214, the guide shaft 225 and the guide hole 224 cooperate to prevent the second movable bar 221 from tilting. Compared with the prior art, the guide hole 224 and the guide shaft 225 of the present invention limit the movement state of the second movable bar 221, thereby ensuring that the second movable bar 221 can only move in a straight line.

[0049] See Figure 10 As shown: Piston 22 also includes a sealing plug 226, an electromagnet 227, and a second elastic element 228. The top of piston 22 has a groove for the sealing plug 226 to slide. The sealing plug 226 slides along the axis of piston 22. The electromagnet 227 is fixedly installed at the bottom of the groove. The electromagnet 227 and the sealing plug 226 are magnetically coupled. A switch for controlling the operation of the electromagnet 227 is fixedly installed on the base plate 1. The switches of the electromagnets 227 in different square frames 21 are different. The second elastic element 228 is fixedly installed between the bottom of the groove and the sealing plug 226. A second channel 229 is opened on piston 22, which connects the groove and the outside of piston 22.

[0050] When the plate is fixed by negative pressure, the electromagnet 227 in the inner square frame 21 is activated by the switch. The electromagnet 227 works to attract the sealing plug 226 to move vertically into the groove. At this time, the groove will be connected to the outside through the second channel 229. The negative pressure generated by the piston 22 disappears, and the inner square frame 21 will move downward vertically. Compared with the prior art, the sealing plug 226, electromagnet 227, second elastic element 228 and second channel 229 of the present invention cooperate to make the negative pressure generated by the piston 22 disappear, so that only one square frame 21 pushes the plate upward at the same time.

[0051] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A plate hole-milling anti-warping positioning device, comprising a base plate (1), a positioning assembly (2) and a control assembly (3), characterized in that, The positioning assembly (2) comprises a square frame (21), a piston (22), a water tank (23) and a floating plate (24); The opening surface of the square frame (21) is arranged in the vertical direction, the square frame (21) is arranged above the bottom plate (1) in the vertical direction, four corners of the square frame (21) are each provided with a circular through hole (211) vertically penetrating the square frame (21), the bottom surface of the square frame (21) is fixedly provided with a first fixed sleeve (212) coaxial with the circular through hole (211), the inner diameter of the first fixed sleeve (212) is equal to the diameter of the circular through hole (211), the first fixed sleeve (212) can pass through the bottom plate (1), the number of the square frame (21) is at least three, the side lengths of all the square frames (21) are not equal, and the centers of all the square frames (21) are located at the same point; The piston (22) is arranged in the vertical direction inside the circular through hole (211), the control assembly (3) comprises a movable plate (31) and an elastic telescopic rod (32), the movable plate (31) is arranged in the vertical direction at the bottom of the bottom plate (1), and the elastic telescopic rod (32) is fixedly arranged between the movable plate (31) and the piston (22); The water tank (23) is fixedly arranged between the bottom plate (1) and the movable plate (31), the water tank (23) is fixedly provided with a second fixed sleeve (231) extending upwards, the inside of the second fixed sleeve (231) is communicated with the inside of the water tank (23), and the second fixed sleeve (231) is coaxially arranged outside the first fixed sleeve (212); The floating plate (24) is arranged in the inside of the second fixed sleeve (231), the shape of the floating plate (24) is consistent with that of the second fixed sleeve (231), the floating plate (24) is fixedly provided with a first fixed strip (241) extending upwards, and the floating plate (24) moves along with the change of the liquid level height in the inside of the second fixed sleeve (231).

2. The hole-milling anti-warping positioning device for plate material according to claim 1, characterized in that, The inside of the square frame (21) is provided with a first channel (213), the first channel (213) communicates between two adjacent circular through holes (211), and the first channel (213) is located at a position of the square frame (21) away from the first fixed sleeve (212).

3. The device of claim 2, wherein, The movable plate (31) is fixedly provided with a second fixed strip (33) extending upwards, the second fixed strip (33) penetrates the water tank (23) and the floating plate (24) in sequence, the second fixed strip (33) is in sliding fit with the water tank (23) and the floating plate (24), and when the bottom of the piston (22) is in contact with the floating plate (24), the second fixed strip (33) can drive the floating plate (24) to move downward in the vertical direction.

4. The device of claim 3, wherein, The first movable strip (242) is slidably arranged on the floating plate (24), and the sliding direction of the first movable strip (242) is parallel to the sliding direction of the floating plate (24); the number of the first movable strip (242) and the first fixed strip (241) is both two; the first movable strip (242) and the first fixed strip (241) are evenly and spacedly arranged around the center of the floating plate (24); the top of the first movable strip (242) is slidably provided with a fixed pin (243), the sliding direction of the fixed pin (243) is parallel to the center line of the two first movable strips (242), the second fixed strip (33) can be inserted into the inside of the first movable strip (242), the top end of the second fixed strip (33) is provided with a fixed hole (331) for inserting the fixed pin (243), and the second movable strip (221) is slidably arranged on the piston (22); the sliding direction of the second movable strip (221) is parallel to the diameter direction of the piston (22); when the bottom of the piston (22) is in contact with the floating plate (24), the second movable strip (221) pushes the fixed pin (243) to be inserted into the fixed hole (331).

5. The device of claim 4, wherein, The fixed pin (243) is a stepped cylinder, two fixed pins (243) are arranged in each first movable strip (242), and the adjacent fixed pins (243) are matched by the same magnetic force.

6. The device of claim 5, wherein, The second fixed strip (33) is provided with a long sliding groove (332) which can be slidably matched with the fixed pin (243).

7. The device of claim 6, wherein, The inner wall of the second fixed sleeve (231) is fixedly provided with a first limiting strip (232), the length direction of the first limiting strip (232) is parallel to the axis of the second fixed sleeve (231), and the floating plate (24) is provided with a first limiting sliding groove (244) which is slidably matched with the first limiting strip (232).

8. The device of claim 7, wherein, The inner wall of the first fixed sleeve (212) is fixedly provided with a second limiting strip (214), the length direction of the second limiting strip (214) is parallel to the axis of the first fixed sleeve (212), and the piston (22) is provided with a second limiting sliding groove (222) which can be slidably matched with the second limiting strip (214); the second movable strip (221) is slidably arranged in the second limiting sliding groove (222); the first elastic member (223) is fixedly arranged between the second movable strip (221) and the piston (22); and the top end of the second movable strip (221) is provided with an inclined surface which can be slidably matched with the second limiting sliding groove (222).

9. The device of claim 8, wherein, The second movable strip (221) is provided with a guide hole (224), and the piston (22) is fixedly provided with a guide shaft (225) which can be matched with the guide hole (224); the axis of the guide shaft (225) is parallel to the diameter direction of the piston (22).

10. The device of claim 9, wherein, The piston (22) further comprises a sealing plug (226), an electromagnet (227) and a second elastic member (228), the top of the piston (22) is provided with a groove capable of allowing the sealing plug (226) to slide, the sealing plug (226) slides along the axial direction of the piston (22), the electromagnet (227) is fixedly arranged at the bottom of the groove, the electromagnet (227) is in magnetic force cooperation with the sealing plug (226), the bottom plate (1) is fixedly provided with a switch capable of controlling the working of the electromagnet (227), the switches of the electromagnets (227) in different square frames (21) are different, the second elastic member (228) is fixedly arranged between the bottom of the groove and the sealing plug (226), and the piston (22) is provided with a second channel (229), and the second channel (229) is communicated with the groove and the outside of the piston (22).

Images