Oil storage tank for lubricating oil

Abstract

The utility model relates to the technical field of lubricating oil storage tanks, and discloses an oil storage tank for lubricating oil, which comprises a tank body, the bottom of the tank body is fixedly connected with a discharge pipe, the top of the tank body is provided with a sealing groove, the inner side of the tank body is provided with an inner groove, and the inner side of the inner groove is fixedly provided with an annular heating plate. A stirring mechanism used for stirring lubricating oil in the tank body and cleaning the inner wall of the tank body is arranged on the inner side of the tank body, and a moving mechanism used for moving the stirring mechanism is further arranged on the outer side of the tank body. When the anti-solidification lubricating oil tank is used, a user can seal the tank body through the moving mechanism, then anti-solidification treatment can be conducted on lubricating oil in the tank body through the annular heating plate and the stirring mechanism, meanwhile, the user can clean the inner wall of the tank body through the stirring mechanism, the problem that the lubricating oil is solidified in low-temperature weather can be solved, and the lubricating oil tank is convenient to use. And the inner wall of the tank body can be cleaned through the stirring mechanism, so that the use convenience is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil storage tanks, and specifically to an oil storage tank for lubricating oil. Background Art

[0002] Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. The most important properties of lubricating oil are viscosity and lubricity. Due to the temperature, oxygen in the air and the antioxidant ability shown by the catalytic effect of metals, after the oil is oxidized, it will generate fine carbon-like substances mainly composed of asphaltene, viscous lacquer-like substances or paint films, or viscous water-containing substances according to the conditions of use, thereby reducing or losing its performance. After the existing lubricating oil is produced, most of it is stored in oil tanks.

[0003] Most of the existing lubricating oil storage tanks do not have a heating function, which causes the lubricating oil to solidify in low temperature weather, making it inconvenient for users to take out the lubricating oil from the storage tank. In addition, the existing oil storage tanks are not equipped with cleaning devices. When the lubricating oil needs to be replaced, it is very troublesome to manually clean the inside of the storage device. Utility Model Content

[0004] The purpose of the utility model is to provide an oil storage tank for lubricating oil, which solves the problem that most of the existing lubricating oil storage tanks do not have a heating effect, which causes the lubricating oil to solidify in low temperature weather, making it inconvenient for users to take out the lubricating oil in the oil storage tank, and the existing oil storage tanks are not equipped with cleaning devices. When the lubricating oil needs to be replaced, it is very troublesome to manually clean the inside of the storage device.

[0005] The utility model provides the following technical solution: an oil storage tank for lubricating oil, comprising a tank body, a discharge pipe fixedly connected to the bottom of the tank body, a sealing groove provided on the top of the tank body, an inner groove provided on the inner side of the tank body, an annular heating plate fixedly installed on the inner side of the inner groove, a control panel for controlling the operation of the annular heating plate fixedly connected to the outer side of the tank body, a stirring mechanism for stirring the lubricating oil in the tank body and for cleaning the inner wall of the tank body is arranged on the inner side of the tank body, and a moving mechanism for moving the stirring mechanism is also arranged on the outer side of the tank body.

[0006] As a preferred embodiment of the above technical solution, the control panel is electrically connected to the annular heating plate, and a power interface for connecting an external power cord is also provided at the bottom of the control panel. A manual valve is installed on the inner side of the discharge pipe. The user can plug the external power cord into the socket at the bottom of the control panel, and then start the annular heating plate through the control panel to heat the lubricating oil in the tank body. The lubricating oil in the tank body is then stirred with the cooperation of the stirring mechanism to avoid the problem of solidification at low temperatures.

[0007] As a preferred embodiment of the above technical solution, the moving mechanism includes a shell fixedly connected to the outside of the tank body, the bottom of the shell is fixedly connected to a first motor, the output shaft of the first motor passes through the shell and is fixedly connected to a first screw, the external thread of the first screw is connected to a bracket, the external sliding connection of the bracket is connected to a limit rod, the top of the bracket is fixedly connected to a sealing cover, and the bottom of the sealing cover is fixedly connected to a sealing ring. During use, the user can start the first motor, and the first motor drives the first screw to rotate. The rotation of the first screw drives the bracket to move downward through the limit rod, the movement of the bracket drives the sealing cover to move, and the movement of the sealing cover drives the stirring mechanism to move. When the sealing cover moves to a certain position, the sealing ring at the bottom will be inserted into the sealing groove at the top of the tank body. At this time, the tank body can be sealed, and then the user can add lubricating oil into the tank body through the feeding pipe. After that, the user can use the stirring mechanism and the annular heating plate to prevent the lubricating oil in the tank body from solidifying, thereby achieving the sealing of the tank body. At the same time, the stirring mechanism can be moved out of the tank body through the moving mechanism, so as to facilitate the use of the stirring mechanism for inspection and cleaning, thereby further improving practicality.

[0008] As a preferred embodiment of the above technical solution, one end of the first screw away from the first motor is rotatably connected to the inner top of the shell through a bearing seat, both ends of the limit rod are fixedly connected to the inner side of the shell, the bracket is distributed on the inner side of the shell, and the top of the bracket passes through the shell and is fixedly connected to the sealing cover, the diameter of the sealing ring is matched with the inner diameter of the sealing groove, and the top of the sealing cover is also fixedly connected to a feed pipe, and a manual valve is installed on the inner side of the feed pipe.

[0009] As a preferred embodiment of the above technical solution, the stirring mechanism includes a second motor fixedly connected to the top of the sealing cover, the output shaft of the second motor is fixedly connected to a driving bevel gear, the outside of the driving bevel gear is meshed with a driven bevel gear, the outside of the driven bevel gear is fixedly connected to an inner tube, the outside of the inner tube is fixedly connected to a plurality of slide grooves, the inside of the slide groove is fixedly connected to a fixing rod, the outside of the fixing rod is slidably connected to a sliding block, the outside of the sliding block is fixedly connected to a sliding rod, the end of the sliding rod away from the sliding block is fixedly connected to a scraper, the top of the sliding block is fixedly connected to a support rod, the outside of the support rod is rotatably connected to a connecting rod, the outside of the connecting rod is rotatably connected to a support, the outside of the support is fixedly connected to a moving block, the inside of the moving block is threadedly connected to a second screw, and the top of the second screw is fixedly connected to a crank. When in use, the user can send the stirring mechanism into the tank body through the moving mechanism, and then the second motor can be started, the second motor drives the driving bevel gear to rotate, the rotation of the driving bevel gear drives the driven bevel gear to rotate, and the rotation of the driven bevel gear drives the inner tube The second screw drives the two moving blocks to move downward, and the movement of the moving block drives the support and the connecting rod to move. The movement of the connecting rod drives the support rod to move. The movement of the support rod drives the slider to move through the fixed rod, and the movement of the slider drives the sliding rod to move. The movement of the sliding rod drives the scraper to move toward the inner wall of the tank body. When the scraper contacts the inner wall of the tank body, the user can start the second motor. Similarly, the second motor drives the inner tube, the slide chute and the scraper to move through the active bevel gear and the driven bevel gear. The movement of the scraper will scrape off the lubricating oil attached to the inner wall of the tank body, thereby cleaning the tank body. This achieves the effect of stirring the lubricating oil in the tank body and cleaning the inner wall of the tank body at the same time, increasing the function of the stirring mechanism and thus improving the convenience of use.

[0010] As a preferred embodiment of the above technical solution, the bottom of the second motor is fixedly connected to a mounting bracket, the mounting bracket is fixedly connected to the top of the sealing cover, the second motor is fixedly connected to the top of the sealing cover through the mounting bracket, the inner tube is installed on the sealing cover through a bearing seat, a plurality of leakage holes are opened at the inner bottom of the inner tube, a rubber sealing ring is also fixedly connected to the inner side of the top of the inner tube, the bottom of the second screw is installed on the inner bottom of the inner tube through the bearing seat, and the top of the second screw passes through the rubber sealing ring and is fixedly connected to the crank.

[0011] The cam is an axially coupled machine which is adapted to engage the second end of the sliding member and to allow the two members to move relative to each other.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model is provided with a tank body, an annular heating plate, a control panel, a movable mechanism and a stirring mechanism. When in use, the user can send the stirring mechanism into the tank body through the movable mechanism, and then seal the tank body through the cooperation of the sealing cover, the sealing ring and the sealing groove in the movable mechanism, and then send the lubricating oil into the tank body through the feeding pipe, and then start the second motor, and start the annular heating plate through the control panel, the annular heating plate can heat the lubricating oil in the tank body, and the stirring mechanism can stir the lubricating oil in the tank body, thereby avoiding the problem of solidification of the lubricating oil when the temperature is low, and when the tank body needs to be cleaned, the scraper in the stirring mechanism can be used to clean the inner wall of the tank body, so that the lubricating oil in the tank body can be heated and stirred, thereby avoiding the problem of solidification in low temperature weather, and the inner wall of the tank body can also be cleaned by the stirring mechanism, thereby improving the functionality of the stirring mechanism and greatly improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a lubricating oil storage tank from a first perspective;

[0015] Figure 2 This is a schematic cross-sectional view of the shell plate structure of a lubricating oil storage tank;

[0016] Figure 3 It is a schematic side section diagram of the overall structure of a lubricating oil storage tank;

[0017] Figure 4 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0018] Figure 5 for Figure 3Enlarged schematic diagram of the structure at point B in the middle.

[0019] In the figure: 1. tank body; 2. discharge pipe; 3. sealing groove; 4. inner groove; 5. annular heating plate; 6. control panel; 11. shell; 12. first motor; 13. first screw; 14. bracket; 15. limit rod; 16. sealing cover; 17. sealing ring; 21. second motor; 22. active bevel gear; 23. driven bevel gear; 24. inner tube; 25. slide groove; 26. fixed rod; 27. slider; 28. slide rod; 29. ​​scraper; 210. support rod; 211. connecting rod; 212. support; 213. moving block; 214. second screw; 215. crank. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Embodiment 1

[0022] like Figure 1 and Figure 3 As shown, the utility model provides a technical solution: an oil storage tank for lubricating oil, comprising a tank body 1, a discharge pipe 2 is fixedly connected to the bottom of the tank body 1, a sealing groove 3 is provided on the top of the tank body 1, an inner groove 4 is provided on the inner side of the tank body 1, an annular heating plate 5 is fixedly installed on the inner side of the inner groove 4, a control panel 6 for controlling the operation of the annular heating plate 5 is also fixedly connected to the outer side of the tank body 1, a stirring mechanism for stirring the lubricating oil in the tank body 1 and for cleaning the inner wall of the tank body 1 is provided on the inner side of the tank body 1, and .... The control panel 6 is electrically connected to the annular heating plate 5 and a power interface for connecting an external power line is also provided at the bottom of the control panel 6. A manual valve is installed on the inner side of the discharge pipe 2, so that when in use, the user can plug the external power line into the socket at the bottom of the control panel 6, and then start the annular heating plate 5 through the control panel 6 to heat the lubricating oil in the tank body 1, and then stir the lubricating oil in the tank body 1 with the cooperation of the stirring mechanism, so as to avoid the problem of solidification at low temperature.

[0023] It should be noted that the annular heating plate 5 is a PHR series heating plate.

[0024] like Figure 2 and Figure 4As shown, the moving mechanism includes a shell 11 fixedly connected to the outside of the tank body 1, a first motor 12 is fixedly connected to the bottom of the shell 11, an output shaft of the first motor 12 passes through the shell 11 and is fixedly connected to a first screw 13, an external thread of the first screw 13 is connected to a bracket 14, an external sliding connection of the bracket 14 is connected to a limit rod 15, a sealing cover 16 is fixedly connected to the top of the bracket 14, a sealing ring 17 is fixedly connected to the bottom of the sealing cover 16, an end of the first screw 13 away from the first motor 12 is rotatably connected to the inner top of the shell 11 through a bearing seat, both ends of the limit rod 15 are fixedly connected to the inner side of the shell 11, the bracket 14 is distributed on the inner side of the shell 11, and the top of the bracket 14 passes through the shell 11 and is fixedly connected to the sealing cover 16, the diameter of the sealing ring 17 is adapted to the inner diameter of the sealing groove 3, a feed pipe is also fixedly connected to the top of the sealing cover 16, and a manual valve is installed on the inner side of the feed pipe.

[0025] Through the above technical solution, when in use, the user can start the first motor 12, and the first motor 12 drives the first screw 13 to rotate. The rotation of the first screw 13 drives the bracket 14 to move downward through the limit rod 15. The movement of the bracket 14 drives the sealing cover 16 to move. The movement of the sealing cover 16 drives the stirring mechanism to move. When the sealing cover 16 moves to a certain position, the sealing ring 17 at the bottom will be inserted into the sealing groove 3 at the top of the tank body 1. At this time, the tank body 1 can be sealed. After that, the user can add lubricating oil to the tank body 1 through the feeding pipe. After that, the user can use the stirring mechanism and the annular heating plate 5 to prevent the lubricating oil in the tank body 1 from solidifying, thereby achieving the sealing of the tank body 1. At the same time, the stirring mechanism can be moved out of the tank body 1 through the moving mechanism, so as to facilitate the use of the stirring mechanism for inspection and cleaning, thereby further improving practicality.

[0026] Embodiment 2

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the utility model provides a technical solution: an oil storage tank for lubricating oil, comprising a tank body 1, a discharge pipe 2 is fixedly connected to the bottom of the tank body 1, a sealing groove 3 is opened on the top of the tank body 1, an inner groove 4 is opened on the inner side of the tank body 1, an annular heating plate 5 is fixedly installed on the inner side of the inner groove 4, a control panel 6 for controlling the operation of the annular heating plate 5 is also fixedly connected to the outer side of the tank body 1, a stirring mechanism for stirring the lubricating oil in the tank body 1 and for cleaning the inner wall of the tank body 1 is arranged on the inner side of the tank body 1, a moving mechanism for moving the stirring mechanism is also arranged on the outer side of the tank body 1, the stirring mechanism comprises a second motor 21 fixedly connected to the top of the sealing cover 16, an active bevel gear 22 is fixedly connected to the output shaft of the second motor 21, and a main The driven bevel gear 22 is meshed with the driven bevel gear 23 on the outside, the driven bevel gear 23 is fixedly connected with the inner tube 24 on the outside, the inner tube 24 is fixedly connected with a plurality of slide grooves 25 on the outside, the inner side of the slide groove 25 is fixedly connected with a fixed rod 26, the outer side of the fixed rod 26 is slidably connected with a slider 27, the outer side of the slider 27 is fixedly connected with a slider 28, the end of the slider 28 away from the slider 27 is fixedly connected with a scraper 29, the top of the slider 27 is fixedly connected with a support rod 210, the outer side of the support rod 210 is rotatably connected with a connecting rod 211, the outer side of the connecting rod 211 is rotatably connected with a support 212, the outer side of the support 212 is fixedly connected with a moving block 213, the inner side of the moving block 213 is threadedly connected with a second screw 214, the top of the second screw 214 is fixedly connected with A crank 215 is connected, a mounting frame is fixedly connected to the bottom of the second motor 21, the mounting frame is fixedly connected to the top of the sealing cover 16, the second motor 21 is fixedly connected to the top of the sealing cover 16 through the mounting frame, the inner tube 24 is installed on the sealing cover 16 through a bearing seat, a plurality of leakage holes are opened at the inner bottom of the inner tube 24, a rubber sealing ring is also fixedly connected to the inner side of the top of the inner tube 24, the bottom of the second screw 214 is installed at the inner bottom of the inner tube 24 through a bearing seat, and the top of the second screw 214 passes through the rubber sealing ring and is fixedly connected to the crank 215, so that the rubber sealing ring can seal the inner tube 24, thereby preventing foreign matter from entering the inner tube 24, and there are two groups of slide grooves 25, sliders 27, slide rods 28, connecting rods 211 and supports 212, and Each group has two, and there are two scrapers 29 and moving blocks 213. The two groups of slide grooves 25 are fixedly connected to the outside of the inner tube 24, and each group of two slide grooves 25 is symmetrically distributed. The inner sides of the two groups of slide grooves 25 are fixedly connected with fixed rods 26. The two groups of sliders 27 are slidably connected to the fixed rods 26 inside the two groups of slide grooves 25, respectively. One ends of the two groups of slide rods 28 are fixedly connected to the two groups of sliders 27, and the other ends of the two groups of slide rods 28 pass through the two groups of slide grooves 25 and are fixedly connected to the two scrapers 29. The two scrapers 29 are symmetrically distributed. The tops of the two groups of sliders 27 are fixedly connected with support rods 210, one ends of the two groups of connecting rods 211 are rotatably connected to the two groups of support rods 210, and the other ends of the two groups of connecting rods 211 are rotatably connected to the two groups of supports 212, respectively.The two sets of supports 212 are respectively fixedly connected to the outside of the two moving blocks 213, and the two moving blocks 213 are both threadedly connected to the second screw 214. The inner tube 24 is provided with two openings distributed at equal intervals, and the two moving blocks 213 are respectively distributed inside the two openings.

[0028] Through the above technical solution, when in use, the user can send the stirring mechanism into the tank body 1 through the moving mechanism, and then start the second motor 21. The second motor 21 drives the active bevel gear 22 to rotate, and the active bevel gear 22 rotates to drive the driven bevel gear 23 to rotate. The driven bevel gear 23 rotates to drive the inner tube 24 to rotate, and the inner tube 24 rotates to drive the chute 25 and the scraper 29 to rotate. At this time, the lubricating oil in the tank body 1 can be stirred. When the tank body 1 needs to be cleaned, the user can pour clean water into the tank body 1 through the feeding pipe, and then turn the crank 215. The rotation of the crank 215 drives the second screw 214 to rotate. The rotation of the second screw 214 drives the two moving blocks 213 to move downward, and the movement of the moving block 213 drives the support 212 and the connecting rod 211 to move. The movement of the connecting rod 211 drives the support rod 210 to move, the movement of the support rod 210 drives the slider 27 to move through the fixed rod 26, the movement of the slider 27 drives the slide bar 28 to move, and the movement of the slide bar 28 drives the scraper 29 to move toward the inner wall of the tank body 1. When the scraper 29 contacts the inner wall of the tank body 1, the user can start the second motor 21. Similarly, the second motor 21 drives the inner tube 24, the slide groove 25 and the scraper 29 to move through the active bevel gear 22 and the driven bevel gear 23. The movement of the scraper 29 will scrape off the lubricating oil attached to the inner wall of the tank body 1, thereby cleaning the tank body 1, thereby achieving the effect of stirring the lubricating oil in the tank body 1 while cleaning the inner wall of the tank body 1, increasing the function of the stirring mechanism, and thus improving the convenience of use.

[0029] It should be noted that the length of the scraper 29 is adapted to the inner height of the tank body 1 .

[0030] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A lubricating oil storage tank, comprising a tank body (1), a discharge pipe (2) being fixedly connected to the bottom of the tank body (1), characterized in that: The top of the tank body (1) is provided with a sealing groove (3), the inner side of the tank body (1) is provided with an inner groove (4), an annular heating plate (5) is fixedly mounted on the inner side of the inner groove (4), the outer side of the tank body (1) is also fixedly connected with a control panel (6) for controlling the operation of the annular heating plate (5), the inner side of the tank body (1) is provided with a stirring mechanism for stirring the lubricating oil in the tank body (1) and for cleaning the inner wall of the tank body (1), and the outer side of the tank body (1) is also provided with a moving mechanism for moving the stirring mechanism.

2. The lubricating oil storage tank according to claim 1, characterized in that: The control panel (6) is electrically connected to the annular heating plate (5), and a power interface for connecting to an external power line is also provided at the bottom of the control panel (6). A manual valve is installed on the inner side of the discharge pipe (2).

3. The lubricating oil storage tank according to claim 1, characterized in that: The moving mechanism comprises a shell (11) fixedly connected to the outside of the tank body (1), a first motor (12) fixedly connected to the bottom of the shell (11), an output shaft of the first motor (12) passing through the shell (11) and fixedly connected to a first screw rod (13), an external thread of the first screw rod (13) being connected to a bracket (14), an external sliding connection of the bracket (14) being connected to a limit rod (15), a sealing cover (16) fixedly connected to the top of the bracket (14), and a sealing ring (17) fixedly connected to the bottom of the sealing cover (16).

4. The lubricating oil storage tank according to claim 3, characterized in that: One end of the first screw rod (13) away from the first motor (12) is rotatably connected to the inner top of the housing (11) via a bearing seat, both ends of the limit rod (15) are fixedly connected to the inner side of the housing (11), the bracket (14) is distributed on the inner side of the housing (11), and the top of the bracket (14) passes through the housing (11) and is fixedly connected to the sealing cover (16), the diameter of the sealing ring (17) is matched with the inner diameter of the sealing groove (3), and the top of the sealing cover (16) is also fixedly connected to a feed pipe, and a manual valve is installed on the inner side of the feed pipe.

5. The lubricating oil storage tank according to claim 3, characterized in that: The stirring mechanism comprises a second motor (21) fixedly connected to the top of the sealing cover (16); a driving bevel gear (22) is fixedly connected to the output shaft of the second motor (21); a driven bevel gear (23) is meshed with the outside of the driving bevel gear (22); an inner tube (24) is fixedly connected to the outside of the driven bevel gear (23); a plurality of slide grooves (25) are fixedly connected to the outside of the inner tube (24); a fixed rod (26) is fixedly connected to the inside of the slide groove (25); a slider (27) is slidably connected to the outside of the fixed rod (26); and the outside of the slider (27) is fixedly connected to the outside of the slider (27). The side is fixedly connected with a slide rod (28), one end of the slide rod (28) away from the slider (27) is fixedly connected with a scraper (29), the top of the slider (27) is fixedly connected with a support rod (210), the outside of the support rod (210) is rotatably connected with a connecting rod (211), the outside of the connecting rod (211) is rotatably connected with a support (212), the outside of the support (212) is fixedly connected with a moving block (213), the inner side of the moving block (213) is threadedly connected with a second screw rod (214), and the top of the second screw rod (214) is fixedly connected with a crank (215).

6. The lubricating oil storage tank according to claim 5, characterized in that: The bottom of the second motor (21) is fixedly connected to a mounting frame, and the mounting frame is fixedly connected to the top of the sealing cover (16). The second motor (21) is fixedly connected to the top of the sealing cover (16) through the mounting frame. The inner tube (24) is mounted on the sealing cover (16) through a bearing seat. A plurality of leakage holes are provided at the inner bottom of the inner tube (24). A rubber sealing ring is also fixedly connected to the inner side of the top of the inner tube (24). The bottom of the second screw rod (214) is mounted on the inner bottom of the inner tube (24) through a bearing seat, and the top of the second screw rod (214) passes through the rubber sealing ring and is fixedly connected to the crank (215).

7. The lubricating oil storage tank according to claim 5, characterized in that: The slide grooves (25), sliders (27), slide bars (28), connecting rods (211) and supports (212) are each in two groups, and each group has two. The scrapers (29) and moving blocks (213) are each in two groups. The two groups of slide grooves (25) are both fixedly connected to the outside of the inner tube (24), and the two slide grooves (25) in each group are symmetrically distributed. The inner sides of the two groups of slide grooves (25) are both fixedly connected to fixed rods (26). The two groups of slide bars (27) are respectively slidably connected to the fixed rods (26) on the inner sides of the two groups of slide grooves (25). One end of the two groups of slide bars (28) is respectively fixedly connected to the two groups of slide bars (27), and the other ends of the two groups of slide bars (28) pass through the two groups of slide grooves. (25) is fixedly connected to the two scrapers (29), the two scrapers (29) are symmetrically distributed, the tops of the two groups of sliders (27) are fixedly connected with support rods (210), one end of the two groups of connecting rods (211) are respectively rotatably connected to the two groups of support rods (210), and the other ends of the two groups of connecting rods (211) are respectively rotatably connected to the two groups of supports (212), the two groups of supports (212) are respectively fixedly connected to the outsides of the two moving blocks (213), the two moving blocks (213) are both threadedly connected to the second screw rod (214), the inner tube (24) is provided with two openings distributed at equal intervals, and the two moving blocks (213) are respectively distributed inside the two openings.

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