A soybean planter with adjustable planting depth

Abstract

The application discloses a soybean planter with adjustable planting depth, which comprises a cylinder, a telescopic measuring scale movably hinged to the bottom surface of the outer side of the cylinder, and a magnetic block fixedly installed on the top surface of the outer side of the cylinder and used for fixing the position of the telescopic measuring scale, and further comprises a slotting mechanism arranged in the interior of the cylinder and used for slotting the land to facilitate soybean seeding, wherein the slotting mechanism comprises an inner cylinder movably installed in the interior of the cylinder, and the application relates to the technical field of agricultural production equipment. The soybean planter with adjustable planting depth is convenient to use and has the advantages that the slotting depth of the slotting mechanism can be conveniently adjusted through the setting of an adjusting screw rod and a fixing plate, the adjusting screw rod is rotated to drive the slotting mechanism to ascend or descend through the fixing plate when the slotting depth of the slotting mechanism needs to be adjusted, the position of the slotting mechanism can be fixed by stopping the rotation of the adjusting screw rod when the slotting mechanism is adjusted to a proper height, and the slotting depth of the slotting mechanism can be adjusted in this way.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural production equipment, in particular to a soybean planter with adjustable planting depth. BACKGROUND

[0002] The soybean planter generally refers to a soybean seeder, which is a planting machine for soybean seeds. When planting soybeans, the planting depth needs to be adjusted according to different varieties and soil and climate conditions in different regions to meet the planting requirements, so as to improve the seed germination rate and growth quality.

[0003] Referring to the patent application disclosed in the authorized announcement No. CN209643324U, a soybean planting dibbler, the elastic spring provides corresponding pressure to the movable block, the movable block can slide left and right inside the material plate, when the hopper contains soybeans, the soybeans are stored in the material cylinder through the feeding groove, when planting is needed, the planting handle is pulled up, at this time, the pressing piece pushes the material plate to the right, when the material plate moves to the right, the feeding groove is blocked by the blocking piece, the material cylinder moves above the discharging groove, so that the soybeans in the material cylinder fall into the soil through the discharging groove, and the labor of the seeder is reduced.

[0004] However, the device of the above technology is moved by pulling the handle to drive the expansion piece to move and groove, and the planting depth needs to be adjusted according to different varieties and soil and climate conditions in different regions when planting soybeans. The existing device is planted by manual use of the device. In actual operation, the depth of the groove can be determined by experience and hand feeling of the planter, and it is difficult to ensure the stability and consistency of the depth of the groove every time the seeds are planted. It is not convenient to use, and the practicality is general. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides a soybean planter with adjustable planting depth, which solves the problem that the existing soybean planter with adjustable planting depth cannot ensure the stability and consistency of the depth of the groove every time the seeds are planted, and is not convenient to use and has general practicality.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme: a soybean planter with adjustable planting depth, comprising a cylinder, a telescopic measuring scale is movably connected to the bottom surface of the outer side of the cylinder, a magnetic block for fixing the position of the telescopic measuring scale is fixedly installed on the top surface of the outer side of the cylinder, and the soybean planter further comprises:

[0007] The slotting mechanism is arranged inside the barrel body for slotting the ground to facilitate soybean planting, comprising an inner barrel movably arranged inside the barrel body, expansion plates movably hinged to the left and right sides of the bottom surface of the inner barrel for slotting the ground, a connecting ring movably arranged inside the inner barrel, pressure plates fixedly arranged to the left and right sides of the connecting ring, and a driving assembly arranged outside the inner barrel for driving the expansion plates to open and slot.

[0008] The adjusting mechanism is arranged outside the barrel body for adjusting the height of the inner barrel to adjust the depth of the device slotting, comprising a fixed frame fixedly arranged outside the barrel body, fixed plates fixedly arranged to the front and back sides of the inner barrel, and a fixing assembly arranged inside the fixed frame for fixing the position of the inner barrel.

[0009] The cleaning mechanism is arranged inside the barrel body for cleaning the soil outside the expansion plates.

[0010] Preferably, the fixing assembly comprises an adjusting screw movably arranged inside the fixed frame for fixing the position of the inner barrel, a bottom ring fixedly arranged to the bottom surface outside the barrel body, connecting grooves formed to the front and back sides of the barrel body, and a magnetic block attracted to the outside of the telescopic measuring scale.

[0011] Preferably, one side of the fixed plate movably penetrates the inside of the connecting groove and extends to the inside of the fixed frame, the top end of the adjusting screw movably penetrates the inside of the fixed frame and extends to the top surface of the fixed frame, and the bottom end of the adjusting screw is threaded through the top surface of the fixed plate and movably arranged to the top surface of the bottom ring.

[0012] Preferably, the driving assembly comprises connecting frames fixedly arranged to the left and right sides of the inner barrel, first limiting rods fixedly arranged inside the connecting frames for limiting the moving track of the pressure plates, first springs movably arranged to the outside of the first limiting rods, connecting rods movably hinged to the left and right sides of the bottom surface of the connecting ring, movable grooves formed to the left and right sides of the barrel body, a discharge hopper fixedly arranged to the top surface of the connecting ring for facilitating soybean feeding, handles fixedly arranged to the top surfaces of the left and right sides of the barrel body for facilitating device taking, and notches formed to the left and right sides of the inner barrel.

[0013] Preferably, one side of the pressure plate movably penetrates the inside of the notches, the connecting frames and the movable grooves and extends to the outside of the barrel body, and the bottom end of the connecting rod is movably hinged to the top surface inside the expansion plate.

[0014] Preferably, the top surface of the first limiting rod movably penetrates the bottom surface of the pressure plate and is fixedly arranged to the top surface of the inner cavity of the connecting frame, the top end of the first spring is fixedly arranged to the bottom surface of the pressure plate, and the bottom end of the first spring is fixedly arranged to the bottom surface of the inner cavity of the connecting frame.

[0015] Preferably, the cleaning mechanism comprises an inner ring movably mounted in the inner part of the barrel, the top surface of the inner ring is fixedly provided with second limiting rods on the front and back sides for limiting the moving track of the inner ring, the outer side of the second limiting rods is movably provided with tension springs for fixing the position of the inner ring, the inner side of the inner ring is provided with four placing grooves, the inner part of the four placing grooves is movably provided with arc-shaped scrapers for scraping off the soil on the outer side of the expansion plate, the side of the arc-shaped scrapers away from the expansion plate is fixedly provided with limiting plates for limiting the position of the arc-shaped scrapers, and the side of the limiting plates is fixedly provided with two second springs.

[0016] Preferably, the side of the arc-shaped scrapers away from the limiting plates movably penetrates the inner part of the four placing grooves and is tightly attached to the outer side of the inner barrel, one end of the two second springs is fixedly provided on the side of the four placing grooves, the top end of the second limiting rod movably penetrates the bottom surface of the fixed plate and extends to the top surface of the fixed plate, the top end of the tension spring is tightly attached to the bottom surface of the fixed plate, and the bottom end of the tension spring is fixedly provided on the top surface of the inner ring.

[0017] The present application provides a soybean planter with adjustable planting depth.

[0018] 1、The soybean planter with adjustable planting depth, by setting the adjusting screw and the fixed plate, the slotting depth of the slotting mechanism is adjusted conveniently, when the slotting depth of the slotting mechanism needs to be adjusted, the adjusting screw is rotated to drive the slotting mechanism to rise or fall through the fixed plate, when the slotting mechanism is adjusted to the appropriate height, the rotation of the adjusting screw is stopped, and the position of the slotting mechanism is fixed, so that the slotting depth of the slotting mechanism is adjusted, and the structure is simple and convenient to use.

[0019] 2、The soybean planter with adjustable planting depth, by setting the pressing plate and the expansion plate, the ground is conveniently grooved for planting soybeans, in use, the soybeans are put into the lower hopper and fall into the inner part of the expansion plate, then the expansion plate is inserted into the ground by holding the handle, then the expansion plate is expanded by stepping on the pressing plate to drive the connecting rod to press down and groove the ground, and the soybeans in the expansion plate fall into the groove to complete the seeding, so that the operation is convenient, and the seeding efficiency is improved.

[0020] 3、The soybean planter with adjustable planting depth, by setting the second limiting rod and the arc-shaped scraper, the soil on the expansion plate is conveniently cleaned, after the device is used, the expansion plate is opened by pushing the pressing plate, then the inner ring is lowered by pressing the second limiting rod, the limiting plate is pushed by the elastic force of the second spring to drive the arc-shaped scraper to tightly attach to the outer side of the expansion plate to scrape off the soil, then the inner ring is reset by the pulling force of the tension spring, so that the cleaning is convenient, and the practicability is good. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional appearance schematic view of the present application;

[0022] Figure 2 It is a front view schematic diagram of the three-dimensional appearance of the present application;

[0023] Figure 3 It is a side view schematic diagram of the three-dimensional appearance of the present application;

[0024] Figure 4 It is a Figure 3 It is an enlarged schematic diagram of the three-dimensional appearance at A in the middle;

[0025] Figure 5 It is a top view schematic diagram of the three-dimensional appearance of the present application;

[0026] Figure 6 It is a schematic diagram of the three-dimensional appearance of the cleaning assembly of the present application.

[0027] In the figure: 1-cylinder, 2-slotted mechanism, 21-discharge hopper, 22-handle, 23-inner cylinder, 24-connection frame, 25-pressing plate, 26-connection ring, 27-movable slot, 28-first limiting rod, 29-first spring, 210-slot, 211-connection rod, 212-expanding plate, 3-adjusting mechanism, 31-adjusting screw, 32-fixed plate, 33-fixed frame, 34-connection slot, 35-bottom ring, 4-cleaning mechanism, 41-second limiting rod, 42-tension spring, 43-inner ring, 44-arc-shaped scraper, 45-limiting plate, 46-second spring, 47-placing groove, 5-telescopic measuring ruler, 6-magnetic block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Referring to Figures 1-6 , the present application provides two technical solutions:

[0030] The first embodiment: a soybean planter with adjustable planting depth, comprising a cylinder 1, a telescopic measuring ruler 5 is movably hinged to the bottom surface of the outer side of the cylinder 1, a magnetic block 6 for fixing the position of the telescopic measuring ruler 5 is fixedly installed on the top surface of the outer side of the cylinder 1, which is convenient to use and controls the spacing of soybean planting, further comprising:

[0031] The slotting mechanism 2 is arranged in the inside of the barrel 1 and is used for slotting the ground to facilitate the planting of soybeans. The slotting mechanism 2 comprises an inner barrel 23 movably arranged in the inside of the barrel 1, and the bottom surface of the inner barrel 23 is movably hinged with expansion plates 212 used for slotting the ground. The inside of the inner barrel 23 is movably arranged with a connecting ring 26, and the top surface of the inner side of the connecting ring 26 is inclined. The left and right sides of the connecting ring 26 are fixedly arranged with pressing plates 25, and the pressing plates 25 are T-shaped. The outside of the inner barrel 23 is arranged with a driving assembly used for driving the expansion plates 212 to open and slot.

[0032] The adjusting mechanism 3 is arranged on the outside of the barrel 1 and is used for adjusting the height of the inner barrel 23 to adjust the depth of the device slotting. The adjusting mechanism 3 comprises a fixed frame 33 fixedly arranged on the outside of the barrel 1, and the front and rear sides of the inner barrel 23 are fixedly arranged with fixed plates 32. The inside of the fixed frame 33 is arranged with a fixing assembly used for fixing the position of the inner barrel 23.

[0033] The cleaning mechanism 4 is arranged on the inside of the barrel 1 and is used for cleaning the soil on the outside of the expansion plates 212. The fixing assembly comprises an adjusting screw 31 movably arranged in the inside of the fixed frame 33 and used for fixing the position of the inner barrel 23. The bottom surface of the outside of the barrel 1 is fixedly arranged with a bottom ring 35. The front and rear sides of the barrel 1 are arranged with connecting grooves 34. One side of the magnetic block 6 is adsorbed on the outside of the telescopic measuring scale 5. One side of the fixed plate 32 movably penetrates the inside of the connecting groove 34 and extends to the inside of the fixed frame 33. The top end of the adjusting screw 31 movably penetrates the inside of the fixed frame 33 and extends to the top surface of the fixed frame 33. The bottom end of the adjusting screw 31 is screwed through the top surface of the fixed plate 32 and is movably arranged on the top surface of the bottom ring 35. Rotating the adjusting screw 31 can drive the fixed plate 32 to adjust the height of the inner barrel 23.

[0034] The adjusting screw 31 and the fixed plate 32 are arranged to facilitate the adjustment of the slotting depth of the slotting mechanism 2. When it is necessary to adjust the slotting depth of the slotting mechanism 2, the adjusting screw 31 is rotated to drive the slotting mechanism 2 to ascend or descend through the fixed plate 32. When the slotting mechanism 2 is adjusted to the appropriate height, the rotation of the adjusting screw 31 is stopped to fix the position of the slotting mechanism 2, so as to adjust the slotting depth of the slotting mechanism 2. The structure is simple and convenient to use.

[0035] The second embodiment, the main difference from the first embodiment is that the drive assembly comprises a connecting frame 24 fixedly installed on the left and right sides of the inner cylinder 23, the inside of the connecting frame 24 is fixedly installed with a first limiting rod 28 for limiting the movement track of the pressing plate 25, the outside of the first limiting rod 28 is movably installed with a first spring 29, the left and right sides of the bottom surface of the connecting ring 26 are movably hinged with a connecting rod 211, and the bottom surface of the connecting rod 211 is in a bent state, the left and right sides of the cylinder body 1 are provided with a movable groove 27, the top surface of the connecting ring 26 is fixedly installed with a discharge hopper 21 for conveniently placing soybeans, the top surface of the left and right sides of the cylinder body 1 is fixedly installed with a handle 22 for conveniently taking the device, the left and right sides of the inner cylinder 23 are provided with a slot 210, one side of the pressing plate 25 movably penetrates the inside of the slot 210, the connecting frame 24 and the movable groove 27 and extends to the outside of the cylinder body 1, the bottom end of the connecting rod 211 is movably hinged to the top surface of the inside of the expansion plate 212, the top surface of the first limiting rod 28 movably penetrates the bottom surface of the pressing plate 25 and is fixedly installed on the top surface of the inner cavity of the connecting frame 24, and pressing the pressing plate 25 can drive the connecting ring 26 to press down, then the connecting ring 26 will drive the connecting rod 211 to press down to open the expansion plate 212 for slotting, the top end of the first spring 29 is fixedly installed on the bottom surface of the pressing plate 25, the bottom end of the first spring 29 is fixedly installed on the bottom surface of the inner cavity of the connecting frame 24, and the pressing plate 25 can be reset by the elastic force of the first spring 29.

[0036] The pressing plate 25 and the expansion plate 212 are provided to conveniently slot the ground for planting soybeans, in use, the soybeans are placed into the discharge hopper 21 and fall into the inside of the expansion plate 212, then the handle 22 is held to insert the expansion plate 212 into the ground, then the pressing plate 25 is stepped on to drive the connecting rod 211 to press down to open the expansion plate 212 to slot the ground, at the same time, the soybeans in the expansion plate 212 fall into the slot to complete the seeding, which is convenient to operate and improves the seeding efficiency.

[0037] The third embodiment, the main difference from the first embodiment is that the cleaning mechanism 4 includes an inner ring 43 movably mounted inside the barrel 1, the top surface of the inner ring 43 is fixedly provided with a second limiting rod 41 for limiting the movement trajectory of the inner ring 43, the outer side of the second limiting rod 41 is movably provided with a tension spring 42 for fixing the position of the inner ring 43, the inner side of the inner ring 43 is provided with four placing grooves 47, the four placing grooves 47 are evenly distributed on the inner side of the inner ring 43, the inside of the four placing grooves 47 is movably provided with an arc-shaped scraper 44 for scraping off the soil on the outer side of the expansion plate 212, and the arc-shaped scraper 44 is arc-shaped, the side of the arc-shaped scraper 44 away from the expansion plate 212 is fixedly provided with a limiting plate 45 for limiting the position of the arc-shaped scraper 44, one side of the limiting plate 45 is fixedly provided with two second springs 46, the side of the arc-shaped scraper 44 away from the limiting plate 45 movably penetrates the inside of the four placing grooves 47 and abuts against the outer side of the inner cylinder 23, one end of the two second springs 46 is fixedly provided on one side of the four placing grooves 47, and the elastic force of the two second springs 46 can push the limiting plate 45 to drive the arc-shaped scraper 44 to scrape off the soil on the outer side of the expansion plate 212, the top end of the second limiting rod 41 movably penetrates the bottom surface of the fixed plate 32 and extends to the top surface of the fixed plate 32, the top end of the tension spring 42 abuts against the bottom surface of the fixed plate 32, the bottom end of the tension spring 42 is fixedly provided on the top surface of the inner ring 43, and pressing the second limiting rod 41 can drive the inner ring 43 to press down to scrape off the soil on the expansion plate 212, and after scraping, releasing the second limiting rod 41 will drive the inner ring 43 to reset through the elastic force of the tension spring 42.

[0038] The second limiting rod 41 and the arc-shaped scraper 44 are provided to facilitate the cleaning of the soil on the expansion plate 212, after using the device, the pressing plate 25 is pushed to open the expansion plate 212, then the second limiting rod 41 is pressed to drive the inner ring 43 to descend, which will push the limiting plate 45 to drive the arc-shaped scraper 44 to abut against the outer side of the expansion plate 212 to scrape off the soil through the elastic force of the second spring 46, and then the inner ring 43 is reset through the tension of the tension spring 42, which is convenient for cleaning and has good practicability.

[0039] Meanwhile, the contents not described in detail in the specification all belong to the existing technology known by those skilled in the art, and the model parameters of each electric appliance are not specifically limited, and conventional equipment can be used.

[0040] In use, the user rotates the adjusting screw 31 to drive the slotted mechanism 2 up and down through the fixed plate 32, and stops rotating the adjusting screw 31 when the slotted mechanism 2 is adjusted to the appropriate height to fix the position of the slotted mechanism 2, so as to adjust the depth of the slotted mechanism 2, and then the soybeans are put into the lower hopper 21 and fall into the inside of the expansion plate 212, and then the telescopic measuring ruler 5 is taken off the magnetic block 6 to measure the distance, and then the expansion plate 212 is inserted into the ground by holding the handle 22, and then the expansion plate 212 is opened by stepping on the pressing plate 25 to drive the connecting rod 211 to press down and expand the expansion plate 212 to groove the ground, and at the same time the soybeans in the expansion plate 212 fall into the groove to complete the seeding, and when the device is used up, the expansion plate 212 is opened by pushing the pressing plate 25, and then the second limiting rod 41 is pressed to drive the inner ring 43 to descend, which is driven by the elastic force of the second spring 46 to push the limiting plate 45 to drive the arc-shaped scraper 44 to tightly adhere to the outside of the expansion plate 212 to scrape off the soil, and then the inner ring 43 is reset by the pulling force of the tension spring 42, and then it can be stored.

[0041] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0042] Although the embodiments of the present application have been shown and described, it is to be understood that various modifications- alterations- substitutions and changes can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A soybean planter with adjustable planting depth, comprising a cylinder (1), characterized in that: The outer bottom of the cylinder (1) is movably connected with a telescopic measuring scale (5), the outer top of the cylinder (1) is fixedly connected with a magnetic block (6) for fixing the position of the telescopic measuring scale (5), and further comprises: A slotting mechanism (2) is arranged in the cylinder (1) for slotting the ground to facilitate soybean planting, the slotting mechanism (2) comprises an inner cylinder (23) movably arranged in the cylinder (1), the left and right sides of the bottom of the inner cylinder (23) are movably connected with expansion plates (212) for slotting the ground, the inner cylinder (23) is movably arranged with a connecting ring (26), the left and right sides of the connecting ring (26) are fixedly connected with pressing plates (25), and the outer side of the inner cylinder (23) is provided with a driving assembly for driving the expansion plates (212) to open for slotting. An adjusting mechanism (3) is arranged on the outer side of the cylinder (1) for adjusting the height of the inner cylinder (23) to adjust the depth of the device slotting, the adjusting mechanism (3) comprises a fixed frame (33) fixedly arranged on the outer side of the cylinder (1), the front and rear sides of the inner cylinder (23) are fixedly connected with fixed plates (32), and the inner side of the fixed frame (33) is provided with a fixing assembly for fixing the position of the inner cylinder (23). A cleaning mechanism (4) is arranged on the inner side of the cylinder (1) for cleaning the soil on the outer side of the expansion plates (212), the cleaning mechanism (4) comprises an inner ring (43) movably arranged in the cylinder (1), the front and rear sides of the top of the inner ring (43) are fixedly connected with second limiting rods (41) for limiting the movement track of the inner ring (43), the outer side of the second limiting rods (41) is movably connected with tension springs (42) for fixing the position of the inner ring (43), the inner side of the inner ring (43) is provided with four placing grooves (47), the inner sides of the four placing grooves (47) are movably connected with arc-shaped scrapers (44) for scraping the soil on the outer side of the expansion plates (212), the sides, away from the expansion plates (212), of the arc-shaped scrapers (44) are fixedly connected with limiting plates (45) for limiting the position of the arc-shaped scrapers (44), and the side of the limiting plates (45) is fixedly connected with two second springs (46).

2. The adjustable depth soybean planter of claim 1, wherein: The fixing assembly comprises an adjusting screw (31) movably arranged in the fixed frame (33) for fixing the position of the inner cylinder (23), the bottom of the outer side of the cylinder (1) is fixedly connected with a bottom ring (35), the front and rear sides of the cylinder (1) are provided with connecting grooves (34), and the side of the magnetic block (6) is attracted to the outer side of the telescopic measuring scale (5).

3. The adjustable depth soybean planter of claim 2, wherein: The side of the fixed plate (32) movably penetrates the inner side of the connecting groove (34) and extends to the inner side of the fixed frame (33), the top end of the adjusting screw (31) movably penetrates the inner side of the fixed frame (33) and extends to the top of the fixed frame (33), and the bottom end of the adjusting screw (31) is screwed through the top of the fixed plate (32) and movably arranged on the top of the bottom ring (35).

4. The adjustable depth soybean planter of claim 1, wherein: The driving assembly comprises a connecting frame (24) fixedly installed on the left and right sides of the inner cylinder (23), a first limiting rod (28) for limiting the moving track of a pressing plate (25) is fixedly installed inside the connecting frame (24), a first spring (29) is movably installed outside the first limiting rod (28), a connecting rod (211) is movably hinged to the bottom surface of the connecting frame (26) on the left and right sides, an active slot (27) is formed on the left and right sides of the cylinder body (1), a discharging hopper (21) for conveniently feeding soybeans is fixedly installed on the top surface of the connecting ring (26), a handle (22) for conveniently taking the device is fixedly installed on the top surface of the left and right sides of the cylinder body (1), and a notch (210) is formed on the left and right sides of the inner cylinder (23).

5. The adjustable depth soybean planter of claim 4, wherein: One side of the pressing plate (25) movably penetrates the inside of the notch (210), the connecting frame (24) and the active slot (27) and extends to the outside of the cylinder body (1), and the bottom end of the connecting rod (211) is movably hinged to the top surface of the inside of the expansion plate (212).

6. The adjustable depth soybean planter of claim 4, wherein: The top surface of the first limiting rod (28) movably penetrates the bottom surface of the pressing plate (25) and is fixedly installed on the top surface of the inner cavity of the connecting frame (24), the top end of the first spring (29) is fixedly installed on the bottom surface of the pressing plate (25), and the bottom end of the first spring (29) is fixedly installed on the bottom surface of the inner cavity of the connecting frame (24).

7. The adjustable depth soybean planter of claim 1, wherein: The arc-shaped scraper (44) movably penetrates the inside of the four placing grooves (47) away from the limiting plate (45) and is tightly attached to the outside of the inner cylinder (23), one end of the two second springs (46) is fixedly installed on one side of the four placing grooves (47), the top end of the second limiting rod (41) movably penetrates the bottom surface of the fixed plate (32) and extends to the top surface of the fixed plate (32), the top end of the tension spring (42) is tightly attached to the bottom surface of the fixed plate (32), and the bottom end of the tension spring (42) is fixedly installed on the top surface of the inner ring (43).

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