Special tool for machining accessories of laser cutting machine
By combining a T-shaped guide rail, a toothed sleeve, an L-shaped support plate, and an L-shaped pressure plate, the problems of limited accessory fixation and slag accumulation in laser cutting are solved, achieving high cutting accuracy and convenient slag cleaning, and improving the service life and ease of operation of the worktable.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG RUIMING MACHINERY EQUIPMENT CO LTD
- Filing Date
- 2026-02-04
- Publication Date
- 2026-04-24
AI Technical Summary
In the laser cutting process, the fixed parts have great limitations, molten slag is easy to accumulate and affect the cutting accuracy, and cleaning is time-consuming and laborious.
It adopts a combination structure of T-shaped guide rail, toothed sleeve, L-shaped support plate and L-shaped pressure plate. By switching between L-shaped pressure plate and scraper, the accessories can be flexibly fixed and the molten slag can be easily cleaned, avoiding slag accumulation and improving cutting accuracy and convenience.
It enables flexible fixing and efficient cleaning of accessories, improves cutting accuracy, extends the service life of the worktable, and reduces the amount of manual cleaning work.
Smart Images
Figure CN121912059A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of laser cutting technology, and more specifically, to a special tooling for processing laser cutting machine parts. Background Technology
[0002] Laser cutting machine fixtures are specialized clamps and devices used to fix, position, and support workpieces during laser cutting. Their core purpose is to ensure that the workpiece remains stable during high-speed, high-precision processing, preventing displacement or vibration, thereby ensuring cutting quality and efficiency.
[0003] However, in actual laser cutting processes, parts are typically placed on a toothed plate worktable and fixed using pneumatic clamps. This method of placement and fixing different parts presents significant limitations. Furthermore, molten slag is generated during laser cutting of toothed plate parts, which tends to accumulate at the ends and sides of the toothed plate. Directly placing parts on the plate results in unevenness, affecting cutting accuracy. This typically requires workers to stand on the worktable and use tools to clean the slag, which is time-consuming and labor-intensive. Summary of the Invention
[0004] To address the above problems, this invention provides a special tooling for processing laser cutting machine parts.
[0005] This invention provides a special tooling for processing laser cutting machine parts, including a T-shaped guide rail, toothed sleeves, an L-shaped support plate, an L-shaped pressure plate, and a scraper. Multiple toothed sleeves are evenly arranged on the bottom end of the T-shaped guide rail. Two L-shaped support plates are symmetrically arranged on the T-shaped guide rail. The L-shaped support plates can reciprocate linearly along the length of the T-shaped guide rail. The L-shaped pressure plate is located inside the L-shaped support plates and can reciprocate linearly vertically relative to the L-shaped support plates, with its position fixed. The scraper is located outside the L-shaped support plates. The L-shaped support plates can be rotated 180° horizontally to switch the L-shaped pressure plate or the scraper into a working state.
[0006] Optionally, the top end of the toothed sleeve is fixedly connected to the bottom end of the T-shaped guide rail, and a connecting rod is fastened between the outer sides of two adjacent toothed sleeves.
[0007] Optionally, the outer surfaces of both sides of the toothed sleeve are symmetrically provided with multiple evenly distributed grooves.
[0008] Optionally, the toothed sleeve has a first stud connected to its inner sidewall, and a first handle and a first rubber gasket are respectively fixed at both ends of the first stud.
[0009] Optionally, a guide rail sleeve is fixedly provided at the bottom end of the L-shaped support plate, and the inner surface of the guide rail sleeve is slidably connected to the outer surface of the upper end of the T-shaped guide rail.
[0010] Optionally, the guide rail sleeve has a second stud threadedly connected to its side wall, and a second handle and a second rubber gasket are respectively fixed at both ends of the second stud.
[0011] Optionally, a rectangular groove is formed in the side wall of the L-shaped support plate, and a guide rod is fixedly fixed vertically on the inner end face of the rectangular groove. The outer surface of the end of the L-shaped pressure plate is slidably connected to the inner surface of the rectangular groove, and the inside of the L-shaped pressure plate is slidably connected to the outer surface of the guide rod. A screw is rotatably connected to the upper end of the L-shaped pressure plate through a bearing. A third handle is fixedly provided at the top of the screw, and the screw is threadedly connected to the upper end of the L-shaped support plate.
[0012] Optionally, an anti-slip pad is attached to the bottom end of the L-shaped pressure plate.
[0013] Optionally, the blade is obliquely fixed to the outside of the L-shaped support plate, and the bottom end of the blade is slidably connected to the upper surface of the T-shaped guide rail.
[0014] The beneficial effects of this invention's specialized tooling for laser cutting machine parts processing are as follows: By selecting an appropriate number of T-shaped guide rails based on the size of the parts to be processed, and cooperating with the horizontal and vertical movement of the L-shaped pressure plate, parts of different sizes can be flexibly fixed at any position on the toothed plate worktable, improving the flexibility of parts processing; by fitting and engaging the toothed sleeve on the outer side of the continuous teeth, not only are the T-shaped guide rails fixed to the toothed plate worktable, but the outer side and top of the continuous teeth are also protected, preventing slag accumulation on the outer side and top of the continuous teeth and extending the service life of the toothed plate worktable; the T-shaped guide rails can be disassembled and assembled on the toothed plate worktable at any time, facilitating timely cleaning of the parts placement surface, improving cutting accuracy, and eliminating the need for workers to stand on the toothed plate worktable and clean each part individually with tools, improving convenience; each T-shaped guide rail corresponds to a single toothed plate, and its structural size is consistent with the single toothed plate, not interfering with the slag generated by laser cutting falling from the gaps between the toothed plates; by adjusting the angle of the L-shaped support plate, the L-shaped pressure plate or scraper can be switched between working states to complete different stages of work accordingly. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a special tooling for processing laser cutting machine parts according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the working state of the L-shaped pressure plate in the special tooling used for processing laser cutting machine parts according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the working state of the scraper in a special tooling for processing laser cutting machine parts according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the external structure of the L-shaped support plate in a special tooling for processing laser cutting machine parts according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the guide rail sleeve in a special tooling for processing laser cutting machine parts according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the external structure of the toothed sleeve in a special tooling for processing laser cutting machine parts according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the toothed sleeve in a special tooling for processing laser cutting machine parts according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the internal structure of the toothed sleeve sidewall in a special tooling for processing laser cutting machine parts according to an embodiment of the present invention.
[0016] Explanation of reference numerals in the attached drawings: 100, T-shaped guide rail; 101, toothed sleeve; 102, connecting rod; 103, groove; 104, first stud; 105, first handle; 106, first rubber pad; 200, guide rail sleeve; 201, second stud; 202, second handle; 203, second rubber pad; 300, L-shaped support plate; 301, rectangular groove; 302, guide rod; 303, L-shaped pressure plate; 304, screw; 305, third handle; 306, anti-slip pad; 400, scraper. Detailed Implementation
[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0019] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.
[0020] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.
[0021] like Figure 1-8 As shown, this embodiment of the invention provides a special tooling for processing laser cutting machine parts, including a T-shaped guide rail 100, toothed sleeves 101, an L-shaped support plate 300, an L-shaped pressure plate 303, and a scraper 400. Multiple toothed sleeves 101 are evenly arranged on the bottom end of the T-shaped guide rail 100. Two L-shaped support plates 300 are symmetrically arranged on the T-shaped guide rail 100. The L-shaped support plates 300 can reciprocate linearly along the length of the T-shaped guide rail 100. The L-shaped pressure plate 303 is located inside the L-shaped support plate 300 and can reciprocate linearly vertically relative to the L-shaped support plate 300, with its position fixed. The scraper 400 is located outside the L-shaped support plate 300. The L-shaped support plate 300 can rotate 180° horizontally to switch either the L-shaped pressure plate 303 or the scraper 400 to a working state.
[0022] In this embodiment, when laser cutting is required for the parts, the parts first need to be fixed on the toothed plate worktable. First, a suitable number of T-shaped guide rails 100 are selected according to the size of the parts to be processed. A single T-shaped guide rail 100 is fixed to a single toothed plate. The upper end of the toothed plate is formed with multiple continuous teeth of the same size. Multiple toothed sleeves 101 on the bottom end of the single T-shaped guide rail 100 are fitted and engaged with the outer side of the multiple continuous teeth at the upper end of the single toothed plate, thus fixing the position of the single T-shaped guide rail 100. The above operation is repeated to fix multiple T-shaped guide rails 100 to multiple consecutive toothed plates on the toothed plate worktable. Then, the parts are placed horizontally on top of the multiple T-shaped guide rails 100. The L-shaped support plates 300 on both sides of the T-shaped guide rail 100 are moved horizontally towards each other to position the L-shaped support plates 300 on both sides of the accessory. Then, the L-shaped pressure plates 303 are moved vertically downward relative to the L-shaped support plates 300 and fixed in position, so that the bottom end of the L-shaped pressure plates 303 presses against the upper surface of the accessory. By moving the L-shaped pressure plates 303 vertically downward on both sides, the accessory is pressed and fixed on the upper end of the T-shaped guide rail 100. Then, the laser cutting head begins to cut the accessory. During the cutting process, slag will be generated at the cutting location of the accessory. Most of the slag will fall onto the bottom of the worktable through the gap between the adjacent T-shaped guide rails 100, and a small amount of slag will adhere to the surface. On the upper surface of the T-shaped guide rail 100, a small amount of molten slag will sputter and adhere to the outer surfaces of both sides of the toothed sleeve 101. After the laser cutting of the parts is completed, the L-shaped pressure plate 303 is moved vertically upward relative to the L-shaped support plate 300 away from the upper surface of the parts. Then, the L-shaped support plates 300 on both sides are moved horizontally away from each other to a suitable position. Next, the remaining parts are removed, and then the T-shaped guide rail 100 with molten slag on its surface is removed. That is, the multiple toothed sleeves 101 at the bottom of the T-shaped guide rail 100 are removed from the outside of the multiple continuous teeth at the upper end of the corresponding single toothed plate. Then, the L-shaped support plate 300 is rotated horizontally by 180° to switch the scraper 400 to the working state. Then, the scraper... 400 moves back and forth along the length of the T-shaped guide rail 100 to remove the slag adhering to the surface of the T-shaped guide rail 100. After cleaning, the L-shaped support plate 300 is rotated 180° horizontally to switch the L-shaped pressure plate 303 to the working state. Then, the cleaned T-shaped guide rail 100 is reinstalled on the toothed plate. Since the surface of the T-shaped guide rail 100 is used to place accessories, it must be flat. Therefore, it needs to be removed and cleaned frequently to ensure the cutting accuracy of accessories. The slag adhering to the toothed sleeve 101 does not need to be cleaned frequently. It only needs to be cleaned periodically. When cleaning, the T-shaped guide rail 100 is removed and the surface of the toothed sleeve 101 is cleaned with tools. By selecting an appropriate number of T-shaped guide rails 100 based on the size of the parts to be processed, and cooperating with the L-shaped pressure plate 303 to move horizontally and vertically, parts of different sizes can be flexibly fixed at any position on the toothed plate worktable, improving the flexibility of parts processing. The toothed sleeve 101, fitted and engaged on the outside of the continuous teeth, not only fixes the T-shaped guide rails 100 to the toothed plate worktable but also protects the outside and top of the continuous teeth, preventing slag accumulation and extending the service life of the toothed plate worktable. The T-shaped guide rails... The 100 can be disassembled and assembled on the toothed plate workbench at any time, facilitating timely cleaning of the parts placement surface and improving cutting accuracy. It eliminates the need for workers to stand on the toothed plate workbench and clean each part individually with tools, thus improving convenience. Each T-shaped guide rail 100 corresponds to a single toothed plate, and its structural size is consistent with that of the single toothed plate, so it does not interfere with the molten slag generated by laser cutting falling from the gaps between the toothed plates. By adjusting the angle of the L-shaped support plate 300, the L-shaped pressure plate 303 or the scraper 400 can be switched between working states to complete different stages of work accordingly.
[0023] like Figure 1 and Figure 2 As shown, optionally, the top end of the toothed sleeve 101 is fixedly connected to the bottom end of the T-shaped guide rail 100, and a connecting rod 102 is fastened between the outer sides of two adjacent toothed sleeves 101.
[0024] In this embodiment, multiple toothed sleeves 101 are evenly distributed along the length of the T-shaped guide rail 100 and fixed to the bottom of the T-shaped guide rail 100, making the multiple toothed sleeves 101 and the T-shaped guide rail 100 a whole. The connecting rod 102 improves the stability of the connection between the toothed sleeves 101 and the T-shaped guide rail 100. The inner side of the toothed sleeve 101 engages with the outer side of the upper end of the toothed plate and matches its size. This not only fixes the position of the T-shaped guide rail 100, but also protects the upper end of the toothed plate. The T-shaped guide rail 100 can be disassembled and assembled on the toothed plate workbench at any time, so as to facilitate timely cleaning of the parts placement surface, improve cutting accuracy, and eliminate the need for workers to stand on the toothed plate workbench and clean them one by one with tools, thus improving convenience.
[0025] like Figure 8 As shown, optionally, multiple uniformly distributed grooves 103 are symmetrically formed on the outer surfaces of both sides of the toothed sleeve 101.
[0026] In this embodiment, in the conventional method, the parts are placed directly on the toothed plate worktable. During laser cutting, some molten slag solidifies at the top and upper outer edge of the toothed plate. As the molten slag accumulates, the parts may tilt, affecting cutting accuracy. This device solves this problem by using a toothed sleeve 101 on the outside of the toothed plate. This not only extends the service life of the toothed plate but also facilitates easy cleaning of molten slag, resolving the inconvenience of cleaning slag in the traditional method. When a small amount of molten slag sputters and adheres to the outer surfaces of both sides of the toothed sleeve 101, the slag will briefly flow and solidify. By creating multiple grooves 103 on the outer surfaces of both sides of the toothed sleeve 101, the flow rate of the molten slag is slowed down, causing the slag to solidify on both sides of the toothed sleeve 101, preventing the slag from flowing and solidifying at the root of the toothed plate. This allows for concentrated cleaning of the slag adhering to the toothed sleeve 101 later, requiring only periodic cleaning as the slag in this area does not affect normal laser cutting.
[0027] like Figure 1 and Figure 8 As shown, optionally, the toothed sleeve 101 is internally threaded with a first stud 104, and the first stud 104 is fixed at both ends with a first handle 105 and a first rubber gasket 106, respectively.
[0028] In this embodiment, since multiple toothed sleeves 101 are provided at the bottom of a single T-shaped guide rail 100, a first stud 104 is provided in the side wall of one or more toothed sleeves 101. When the toothed sleeve 101 is fitted and engaged on the outside of the toothed plate, the first rubber gasket 106 is deformed and pressed against the outside of the toothed plate by rotating the first stud 104. The deformation of the first rubber gasket 106 increases the friction force, further improving the stability of the engagement between the toothed sleeve 101 and the toothed plate, so as to ensure the stability of the T-shaped guide rail 100 fixed on the toothed plate.
[0029] like Figure 1 and Figure 4 As shown, optionally, a guide rail sleeve 200 is fixed at the bottom of the L-shaped support plate 300, and the inner surface of the guide rail sleeve 200 is slidably connected to the outer surface of the upper end of the T-shaped guide rail 100.
[0030] In this embodiment, the guide rail sleeves 200 on both sides are slidably connected to the outer surface of the T-shaped guide rail 100, which drives the L-shaped support plates 300 on both sides to reciprocate linearly along the length of the T-shaped guide rail 100, so as to make horizontal adjustment of the position of the L-shaped pressure plate 303 on the inner side of the L-shaped support plate 300, so as to facilitate the subsequent pressing of the L-shaped pressure plate 303 on both sides of the accessory.
[0031] like Figure 1 , Figure 4 and Figure 5As shown, optionally, the guide rail sleeve 200 has a second stud 201 threadedly connected to the inner side wall, and the second stud 201 has a second handle 202 and a second rubber gasket 203 fixed at both ends.
[0032] In this embodiment, after the guide sleeve 200 moves to a suitable position on the outer surface of the T-shaped guide rail 100, the second stud 201 is rotated to deform the second rubber pad 203 and press it against the outside of the T-shaped guide rail 100. The deformation of the second rubber pad 203 increases the friction, further fixing the position of the guide sleeve 200 so that the entire T-shaped guide rail 100 device can be stored and the guide sleeve 200 can be prevented from slipping off. In addition, when the L-shaped pressure plate 303 presses the accessory, the guide sleeve 200 is fixed in position relative to the T-shaped guide rail 100. The second stud 201 and the second rubber pad 203 further improve the positional stability of the guide sleeve 200 relative to the T-shaped guide rail 100, thereby improving the stability of the accessory being fixed.
[0033] like Figure 4 As shown, optionally, a rectangular groove 301 is provided in the side wall of the L-shaped support plate 300, and a guide rod 302 is vertically fixed on the inner end face of the rectangular groove 301. The outer surface of the end of the L-shaped pressure plate 303 is slidably connected to the inner surface of the rectangular groove 301, and the inside of the L-shaped pressure plate 303 is slidably connected to the outer surface of the guide rod 302. A screw 304 is rotatably connected to the upper end of the L-shaped pressure plate 303 through a bearing. A third handle 305 is fixed at the top of the screw 304, and the screw 304 is threadedly connected to the upper end of the L-shaped support plate 300.
[0034] In this embodiment, the rectangular groove 301 and the guide rod 302 limit the movement of the L-shaped pressure plate 303 within the L-shaped support plate 300, allowing it to move vertically up and down relative to each other. Since the screw 304 is threadedly connected to the L-shaped support plate 300, the screw 304 rotates and moves vertically up and down. Because the lower end of the screw 304 is rotatably connected to the upper end of the L-shaped pressure plate 303 via a bearing, when the third handle 305 is rotated, the screw 304 rotates and moves vertically downward, causing the L-shaped pressure plate 303 to move vertically downward and press against both sides of the accessory, fixing the accessory to the upper end of the T-shaped guide rail 100. Conversely, when the third handle 305 is rotated in the opposite direction, the screw 304 rotates and moves vertically upward, causing the L-shaped pressure plate 303 to move vertically upward and away from the accessory.
[0035] like Figure 4 As shown, optionally, an anti-slip pad 306 is attached to the bottom end of the L-shaped pressure plate 303.
[0036] In this embodiment, when the L-shaped pressure plate 303 drives the anti-slip pad 306 attached to the bottom end to move downward and press against the upper surface of the accessory, the anti-slip pad 306 deforms due to compression. The deformation of the anti-slip pad 306 increases the friction, thereby improving the anti-slip performance and further improving the stability of the accessory fixation.
[0037] like Figure 2 and Figure 3 As shown, optionally, the blade 400 is inclinedly fixed to the outside of the L-shaped support plate 300, and the bottom end of the blade 400 is slidably connected to the upper surface of the T-shaped guide rail 100.
[0038] In this embodiment, the L-shaped support plate 300 is rotated 180° horizontally to switch the L-shaped pressure plate 303 or the scraper 400 to the working state. When the L-shaped pressure plate 303 is switched to the working state, the guide rail sleeve 200 is fitted onto the T-shaped guide rail 100. Then, the L-shaped support plate 300 is moved so that the L-shaped pressure plate 303 is close to the accessory and presses the accessory. The guide rail sleeve 200 is removed from the T-shaped guide rail 100 and the L-shaped support plate 300 is rotated 180° horizontally to switch the scraper 400 to the working state. Then, the guide rail sleeve 200 is fitted onto the T-shaped guide rail 100. Next, the scraper 400 is moved back and forth to remove the slag attached to the upper surface of the T-shaped guide rail 100.
[0039] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.
Claims
1. A special tooling for processing laser cutting machine parts, characterized in that, The device includes a T-shaped guide rail (100), toothed sleeves (101), an L-shaped support plate (300), an L-shaped pressure plate (303), and a scraper (400). Multiple toothed sleeves (101) are evenly arranged on the bottom end of the T-shaped guide rail (100). Two L-shaped support plates (300) are symmetrically arranged on the T-shaped guide rail (100). The L-shaped support plates (300) can reciprocate linearly along the length of the T-shaped guide rail (100). The L-shaped pressure plate (303) is arranged inside the L-shaped support plate (300). The L-shaped pressure plate (303) can reciprocate linearly vertically relative to the L-shaped support plate (300) and its position is fixed. The scraper (400) is arranged outside the L-shaped support plate (300). The L-shaped support plate (300) can be rotated 180° horizontally to switch the L-shaped pressure plate (303) or the scraper (400) to the working state.
2. The special tooling for processing laser cutting machine parts as described in claim 1, characterized in that, The top end of the toothed sleeve (101) is fixedly connected to the bottom end of the T-shaped guide rail (100), and a connecting rod (102) is fastened between the outer sides of two adjacent toothed sleeves (101).
3. The special tooling for processing laser cutting machine parts as described in claim 1, characterized in that, The toothed sleeve (101) has multiple uniformly distributed grooves (103) symmetrically formed on both outer surfaces.
4. The special tooling for processing laser cutting machine parts as described in claim 1, characterized in that, The toothed sleeve (101) is internally threaded with a first stud (104), and a first handle (105) and a first rubber gasket (106) are respectively fixed at both ends of the first stud (104).
5. The special tooling for processing laser cutting machine parts as described in claim 1, characterized in that, The bottom end of the L-shaped support plate (300) is fixed with a guide rail sleeve (200), and the inner surface of the guide rail sleeve (200) is slidably connected to the outer surface of the upper end of the T-shaped guide rail (100).
6. The special tooling for processing laser cutting machine parts as described in claim 5, characterized in that, The guide rail sleeve (200) is internally threaded with a second stud (201), and a second handle (202) and a second rubber gasket (203) are respectively fixed at both ends of the second stud (201).
7. The special tooling for processing laser cutting machine parts as described in claim 1, characterized in that, The L-shaped support plate (300) has a rectangular groove (301) in its side wall. A guide rod (302) is fixedly fixed to the inner end face of the rectangular groove (301). The outer surface of the end of the L-shaped pressure plate (303) is slidably connected to the inner surface of the rectangular groove (301), and the inside of the L-shaped pressure plate (303) is slidably connected to the outer surface of the guide rod (302). A screw (304) is rotatably connected to the upper end of the L-shaped pressure plate (303) through a bearing. A third handle (305) is fixed to the top of the screw (304). The screw (304) is threadedly connected to the upper end of the L-shaped support plate (300).
8. The special tooling for processing laser cutting machine parts as described in claim 1, characterized in that, An anti-slip pad (306) is attached to the bottom of the L-shaped pressure plate (303).
9. The special tooling for processing laser cutting machine parts as described in claim 1, characterized in that, The shovel (400) is obliquely fixed on the outside of the L-shaped support plate (300), and the bottom end of the shovel (400) is slidably connected to the upper surface of the T-shaped guide rail (100).