Multifunctional logistics cabinet

Abstract

The application discloses a multifunctional logistics cabinet, which comprises a cabinet body, a plurality of large cabinet grids are arranged on the cabinet body, guide rods are fixedly installed on the lateral surface of the cabinet body, sliding sleeves moving in the vertical direction are arranged on the surface of the guide rods, bearing frames are fixedly installed on the surface of the sliding sleeves, object tables are fixedly installed on the side of the bearing frames away from the sliding sleeves, supporting blocks for supporting the object tables are fixedly installed on the cabinet body below each large cabinet grid, a sealed cylinder with one open side is fixedly installed on the cabinet body, an air nozzle is fixedly installed on the sealed cylinder, a sealing plug is slidingly installed in the sealed cylinder between the air nozzle and the opening, and a steel rope is fixedly installed on the side of the sealing plug away from the air nozzle. The goods are moved from the large cabinet grids to the object tables first, the goods on the object tables are slowly moved downward, and when the goods are moved to a lower position, the goods can be held up by the taking personnel, so that the risk of being hurt when the goods are taken due to being placed too high is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a logistics cabinet, in particular to a multifunctional logistics cabinet. BACKGROUND

[0002] The delivery terminal of express delivery has always been a headache, often because of the uncertainty of the time of the recipient, resulting in the need for multiple visits by the deliveryman, which greatly increases the workload of the deliveryman and the delivery cost of the deliveryman.

[0003] In order to facilitate the deliveryman to put the express delivery and the recipient to take the express delivery, a large number of express delivery cabinets, that is, logistics cabinets, are put in various areas of the city to facilitate management. At present, through the use of intelligent logistics cabinets, the effect of the recipient taking at any time is realized, thereby greatly reducing the workload of delivering express delivery.

[0004] The existing logistics cabinet is generally about 1.8 meters high to fit the height of the present people. However, because the number of large express delivery is small and the number of small express delivery is large, in order to facilitate most of the recipients to take the express delivery, the existing express delivery cabinet has a large cabinet at the top and a small cabinet at the bottom. If the large express delivery is stored in the upper cabinet, it is located at a high place, and if the weight of the express delivery is large, it is easy to hurt the head during taking if the physical strength is not enough or the express delivery is slippery. SUMMARY

[0005] In order to solve at least one technical problem mentioned in the background, the purpose of the present application is to provide a multifunctional logistics cabinet, which facilitates the taking of articles in the high large cabinet and reduces the situation of hand slipping and hurting when taking due to the high position of the express delivery.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a multifunctional logistics cabinet, comprising a cabinet body, the cabinet body is provided with a plurality of large cabinet and small cabinet from top to bottom, the cabinet body is fixedly installed with a guide rod on the side surface, the guide rod is sleeved with a sliding sleeve moving in the vertical direction, the sliding sleeve is fixedly installed with a bearing frame on the surface, the bearing frame is fixedly installed with a loading platform on the side away from the sliding sleeve, the cabinet body is fixedly installed with a sealing cylinder with one side opening above and below each large cabinet, the sealing cylinder is fixedly installed with an air nozzle, the sealing cylinder is slidingly installed with a sealing plug between the air nozzle and the opening, the sealing plug is fixedly installed with a steel wire on the side away from the air nozzle, and the end of the steel wire away from the sealing plug is fixedly connected with the sliding sleeve. When the sliding sleeve moves downward, the sliding sleeve drives the sealing plug to move in the direction away from the air nozzle in the sealing cylinder through the steel wire.

[0007] Further, the axis of the sealing cylinder is not parallel to the horizontal line.

[0008] Further, the sealing cylinder is further provided with a deflation valve.

[0009] Further, the deflation valve comprises a column body, a deflation hole is formed in the column body and communicates with the sealing cylinder, a disc is arranged on the column body and used for plugging the deflation hole, a rubber ring is arranged on the edge of the disc, a shaft rod is fixedly arranged on the side of the disc close to the sealing cylinder, a limiting frame is arranged on the surface of the shaft rod, the limiting frame is fixedly connected with the inner wall of the deflation hole, a first spring is fixedly arranged between the shaft rod and the limiting frame, and the first spring is in a stretched state.

[0010] Further, a belt transmission mechanism is arranged in the large cabinet compartment and used for supporting the articles, the belt transmission mechanism comprises a plurality of synchronous pulleys and a synchronous belt engaged with the synchronous pulleys.

[0011] Further, a first gear is fixedly arranged on the shaft side of the synchronous pulley close to the outlet of the large cabinet compartment, a second gear is arranged on the object table and used for engaging with the first gear, and a driving member is arranged on the object table and used for driving the second gear to rotate.

[0012] Further, a push plate used for pushing the articles is fixedly arranged on the upper side of the synchronous belt.

[0013] Further, a spring assembly used for buffering the push plate is fixedly arranged on the inner wall of the large cabinet compartment, and the spring extension direction of the spring assembly is the same as the moving direction of the push plate.

[0014] Further, the object table is fixedly connected with the sliding sleeve through a bearing frame, and the bearing frame comprises at least two mutually parallel telescopic rods.

[0015] Further, the telescopic rod comprises a sleeve rod fixedly connected with the sliding sleeve, and an insertion rod is slidably arranged in the sleeve rod and fixedly connected with the object table.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: first, the articles are moved from the large cabinet compartment to the object table, then the object table is separated from the supporting protrusion, at this time, the object table, the bearing frame, the sliding sleeve and the articles on the object table are moved downward under the action of gravity, at this time, the sliding sleeve pulls the sealing plug to slide in the sealing cylinder through the steel rope, the sealing plug slowly moves in the sealing cylinder because the pressure in the sealing cylinder is reduced when the sealing plug moves, the sealing cylinder supplements the gas from the outside through the air nozzle, the amount of the gas supplemented in unit time is small, so that the sealing plug slowly moves in the sealing cylinder, and the object table, the bearing frame, the sliding sleeve and the articles on the object table slowly move downward, when the articles move to a lower position, the article taking personnel can hold the articles, thereby reducing the risk of the articles being placed too high and being hurt when taking. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a first variation diagram of the overall structure of the present application.

[0018] Figure 2 Figure 2 is a second variation of the overall structure of the present application;

[0019] Figure 3 Figure 3 is a partial cutaway view of the cabinet body of the present application;

[0020] Figure 4 Figure 4 is a side cutaway view of the cabinet body of the present application;

[0021] Figure 5 Figure 5 is a structural schematic of the sealing cylinder and sealing plug of the present application;

[0022] Figure 6 Figure 6 is a partial enlarged schematic of the structure at B in Figure 1 of the present application; Figure 5

[0023] Figure 7 Figure 7 is a structural schematic of the large cabinet compartment of the present application;

[0024] Figure 8 Figure 8 is a schematic of the object carrier and belt drive mechanism of the present application;

[0025] Figure 9 Figure 9 is a partial enlarged schematic of the structure at A in Figure 1 of the present application; Figure 1

[0026] Figure 10 Figure 10 is a structural schematic of the carrier frame of the present application.

[0027] In the figure: 1, cabinet body; 2, large cabinet compartment; 21, belt drive mechanism; 22, synchronous pulley; 23, synchronous belt; 24, first gear; 25, slot; 26, push plate; 27, spring assembly; 28, guide slot; 29, slide post; 3, small cabinet compartment; 4, guide rod; 5, slide sleeve; 6, carrier frame; 61, telescopic rod; 611, sleeve rod; 612, insertion rod; 7, object carrier; 71, second magnet; 72, second gear; 73, drive member; 8, support bump; 81, first magnet; 9, sealing cylinder; 10, air nozzle; 11, sealing plug; 11, steel cord; 12, first pulley; 13, second pulley; 14, counterweight; 15, air release valve; 151, cylinder; 152, air release hole; 153, horn mouth; 154, disc; 155, shaft rod; 156, limit frame; 157, first spring; 16, steel cord. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present application. ​​

[0029] Referring to Figure 1 , Figure 3 and Figure 5 , the embodiment provides a multifunctional logistics cabinet, which comprises a cabinet body 1, the cabinet body 1 is sequentially provided with a plurality of large cabinet compartments 2 and small cabinet compartments 3 from top to bottom, characterized in that a guide rod 4 is fixedly installed on the side of the cabinet body 1, a sliding sleeve 5 moving in the vertical direction is sleeved on the surface of the guide rod 4, a bearing frame 6 is fixedly installed on the surface, a loading platform 7 is fixedly installed on the side away from the sliding sleeve 5, a support bump 8 for supporting the loading platform 7 is fixedly installed on the cabinet body 1 and located below each large cabinet compartment 2, a sealed cylinder 9 with one side opening is fixedly installed on the cabinet body 1, an air nozzle 10 is fixedly installed on the sealed cylinder 9, the caliber of the air nozzle 10 is 1mm to 3mm, a sealing plug 11 is slidingly installed in the sealed cylinder 9 and located between the air nozzle 10 and the opening, a steel wire 16 is fixedly installed on the side away from the air nozzle 10 of the sealing plug 11, and one end of the steel wire 16 away from the sealing plug 11 is fixedly connected with the upper side of the sliding sleeve 5; when the sliding sleeve 5 moves downward, the sealing plug 11 is driven by the steel wire 16 to move away from the air nozzle 10.

[0030] In the initial state, the loading platform 7, the bearing frame 6 and the sliding sleeve 5 are located on the upper half of the guide rod 4, the loading platform 7 is located on the support bump 8, and the sealing plug 11 is located near the air nozzle 10; when it is necessary to take out the heavy express goods in the large cabinet compartment 2, first, the loading platform 7, the bearing frame 6 and the sliding sleeve 5 are moved along the guide rod 4 to the same height as the large cabinet compartment 2 from which the goods are to be taken out, then the loading platform 7, the bearing frame 6 and the sliding sleeve 5 are rotated around the axis of the guide rod 4 so that the loading platform 7 is close to the outlet of the large cabinet compartment 2, and the lower side of the loading platform 7 is placed on the support bump 8, thereby positioning the loading platform 7, then the goods in the large cabinet compartment 2 are moved out and placed on the loading platform 7, and then the loading platform 7 is separated from the support bump 8.

[0031] At this time, the loading platform 7, the bearing frame 6, the sliding sleeve 5 and the goods on the loading platform 7 move downward under the action of gravity, at this time, the sliding sleeve 5 pulls the sealing plug 11 in the sealed cylinder 9 through the steel wire 16; when the sealing plug 11 moves, the pressure in the sealed cylinder 9 decreases, the sealed cylinder 9 supplements gas from the outside through the air nozzle 10, but because the caliber of the air nozzle 10 is small, generally 1mm to 3mm, the amount of gas supplemented per unit time is small, so the distance that the sealing plug 11 moves in the sealed cylinder 9 per unit time is small; when the sealing plug 11 is pulled by a relatively stable force, the sealing plug 11 moves slowly in the sealed cylinder 9, so that the loading platform 7, the bearing frame 6, the sliding sleeve 5 and the goods on the loading platform 7 move slowly downward; when the goods move to a lower position, the person taking the goods can hold the goods, thereby reducing the risk of the goods being placed too high and being hurt when taken.

[0032] Referring to Figure 3The first pulley 12 is installed on the guide rod 4 and above the sliding sleeve 5, the second pulley 13 is installed on the cabinet 1 and above the opening of the sealing cylinder 9, and the steel rope 16 is wound around the first pulley 12 and the second pulley 13. The first pulley 12 and the second pulley 13 are guide pulleys and play a guiding role on the steel rope 16.

[0033] The first pulley 12 and the second pulley 13 support the steel rope 16. After placing the object on the object table 7, the sealing plug 11 will be pulled by the steel rope 16 with a relatively stable force, and the pulling rope will move along the first pulley 12 and the second pulley 13, reducing the deviation of the moving direction of the steel rope 16, so that the sealing plug 11 moves slowly and uniformly in the sealing cylinder 9, and the object table 7, the carrier frame 6, the sliding sleeve 5 and the object on the object table 7 will move slowly and uniformly downward.

[0034] Please refer to Figure 1 and Figure 7 , wherein the support block 8 is fixedly installed with a first magnet 81, and the object table 7 is fixedly installed with a second magnet 71 which is attracted to the first magnet 81. By attracting the first magnet 81 and the second magnet 71, the shaking of the object table 7 is reduced, and the stability of the object table 7 is improved.

[0035] Please refer to Figure 3 Figure 5 In order to facilitate the sealing plug 11 to automatically return to the vicinity of the air nozzle 10 after moving, the axis of the sealing cylinder 9 is not parallel to the horizontal line, the opening of the sealing cylinder 9 is upward, and the sealing plug 11 is fixedly installed with a counterweight 14.

[0036] When there is no object on the object table 7, under the action of the gravity of the counterweight 14, the sealing plug 11 will gradually move towards the air nozzle 10, and the gas in the sealing cylinder 9 will be discharged outward through the air nozzle 10. At the same time, the sealing plug 11 will drive the object table 7, the carrier frame 6 and the sliding sleeve 5 to gradually move upward along the guide rod 4 through the steel rope 16, until the object table 7, the carrier frame 6 and the sliding sleeve 5 reach the uppermost side of the guide rod 4.

[0037] In order to make the sealing plug 11 move upward slowly in the sealing cylinder 9 when the object is placed on the object table 7, and make the sealing plug 11 move downward relatively quickly under the action of the counterweight 14 when there is no object on the object table 7, so as to facilitate the rapid movement of the object table 7 to the corresponding position during continuous picking.

[0038] Please refer to Figure 3 , Figure 5 and Figure 6In order to solve the above technical problems, the sealing cylinder 9 is further provided with a deflation valve 15. The deflation valve 15 comprises a cylinder 151, the cylinder 151 is internally provided with a deflation hole 152 communicated with the sealing cylinder 9, the deflation hole 152 is provided with a horn mouth 153 away from the sealing cylinder 9, the horn mouth 153 is provided with a disc 154 for blocking the horn mouth 153, the disc 154 is provided with a rubber ring at the edge, the disc 154 is fixedly provided with a shaft 155 close to the sealing cylinder 9, the shaft 155 is provided with a limiting frame 156, the limiting frame 156 is fixedly connected with the inner wall of the deflation hole 152, the first spring 157 is fixedly arranged between the limiting frame 156 and the side surface of the shaft 155, and the first spring 157 is in a stretched state.

[0039] When the object table 7 is placed with the article, the sealing plug 11 will move upward relative to the sealing cylinder 9, at this time, the pressure in the sealing cylinder 9 is reduced, and the sealing cylinder 9 is in an external air suction state, at this time, the disc 154 is in a state of blocking the horn mouth 153 under the elastic force of the first spring 157, when the object table 7 is not placed with the article, the sealing plug 11 is driven downward by the counterweight 14, the pressure in the sealing cylinder 9 is increased, and the sealing cylinder 9 is in an external air exhaust state, at the same time, the disc 154 at the horn mouth 153 is driven to move away from the sealing cylinder 9 due to the increase of the pressure in the sealing cylinder 9, and at the same time, the first spring 157 is pulled by the shaft 155, and the first spring 157 is further stretched and deformed, in the moving process of the disc 154, the gap between the disc 154 and the horn mouth 153 is gradually increased, thereby accelerating the exhaust of the gas in the sealing cylinder 9, and further accelerating the speed of the downward sliding of the sealing plug 11, thereby greatly improving the speed of the upward movement of the object table 7.

[0040] Please refer to Figure 2 , Figure 7 and Figure 8 , in order to facilitate the movement of the article in the large cabinet 2 and reduce the friction between the article and the inner wall of the large cabinet 2. The large cabinet 2 is provided with a belt drive mechanism 21 for supporting the article, the belt drive mechanism 21 comprises a plurality of synchronous pulleys 22 and a synchronous belt 23 engaged with the synchronous pulleys 22, and the synchronous pulleys 22 are rotatably connected with the inner wall of the large cabinet 2.

[0041] When the article is stored in the large cabinet 2, first, the front end of the article is placed on the synchronous belt 23, and then the article is pushed, at this time, the synchronous belt 23 moves synchronously with the article, the synchronous pulley 22 rotates, and the article is supported, thereby reducing the friction of the article in the large cabinet 2 and facilitating the storage and retrieval of the article.

[0042] If the article is stored deep in the large cabinet 2, the person taking the article may not be able to touch the article due to height reasons, thereby unable to take the article out.

[0043] Please refer to Figure 7 andFigure 8 To solve the above technical problems, the first gear 24 is fixedly installed on the shaft side of the synchronous pulley 22 near the outlet of the large cabinet compartment 2, the second gear 72 for engaging with the first gear 24 is installed on the object table 7, and the driving member 73 such as a driving motor for driving the second gear 72 to rotate is installed on the object table 7.

[0044] When it is necessary to take the articles in the cabinet body 1, first, the object table 7 is moved to the supporting lug 8 of the corresponding large cabinet compartment 2, the object table 7 is supported by the supporting lug 8, at this time, the second gear 72 on the object table 7 is engaged with the first gear 24, then the second gear 72 is driven to rotate by the driving member 73, thereby driving the first gear 24 to rotate, the first gear 24 drives the synchronous pulley 22 in the large cabinet compartment 2 to rotate, thereby the synchronous pulley 22 drives the synchronous belt 23 to move, the synchronous belt 23 drives the articles to gradually move out of the large cabinet compartment 2, and then moves to the object table 7, and then the articles are unloaded by the object table 7.

[0045] Please refer to Figure 1 and Figure 9 The slot 25 for placing the first gear 24 is formed on the cabinet body 1 and located on one side of each large cabinet compartment 2, and the slot 25 is in communication with the large cabinet compartment 2.

[0046] By placing the first gear 24 outside the large cabinet compartment 2, the gap between the synchronous belt 23 in the width direction and the inner wall of the large cabinet compartment 2 is small, that is, the articles in the large cabinet compartment 2 are basically located on the synchronous belt 23, so as to facilitate the conveying, and when the articles are large, the contact area between the synchronous belt 23 and the articles is increased.

[0047] Please refer to Figure 7 To facilitate the pushing of the articles, the push plate 26 for pushing the articles is fixedly installed on the upper side of the synchronous belt 23.

[0048] The initial position of the push plate 26 is located at the outlet of the large cabinet compartment 2, when the express delivery personnel needs to put the articles into the large cabinet compartment 2, first, the articles are placed on the synchronous belt 23, the articles abut against the push plate 26, then the articles are pushed to move into the large cabinet compartment 2, at this time, the synchronous belt 23 moves, and then drives the push plate 26 to move together, when it is necessary to move the articles, the first gear 24 drives the second gear 72 to rotate, and then drives the synchronous pulley 22 and the synchronous belt 23 to rotate, when the articles are clamped by the inner wall of the large cabinet compartment 2, for example, the articles are too large, and the friction between the articles and the inner wall of the large cabinet compartment 2 is large, so that the synchronous belt 23 and the articles slip, the push plate 26 pushes the articles to move out of the large cabinet compartment 2.

[0049] Please refer to Figure 7In order to reduce the collision between the push plate 26 and the inner wall of the cabinet compartment 2 and reduce the damage of the push plate 26, the spring assembly 27 is fixedly arranged on the inner wall of the cabinet compartment 2, and the spring extension direction of the spring assembly 27 is the same as the moving direction of the push plate 26.

[0050] When the push plate 26 moves into the cabinet compartment 2 with an initial speed, the push plate 26 first contacts the spring assembly when the push plate 26 is about to collide with the inner wall of the cabinet compartment 2, the spring assembly buffers the push rod, thereby reducing the impulse of the push plate 26, and reducing the damage of the push plate 26 when moving too fast and colliding with the inner wall of the cabinet compartment 2.

[0051] Please refer to Figure 7 and Figure 8 The side wall of the cabinet compartment 2 is provided with a guide groove 28, and the side surface of the push plate 26 is fixedly provided with a sliding column 29, and the sliding column 29 is arranged in sliding connection with the guide groove 28.

[0052] During the movement of the push plate 26, the push plate 26 drives the sliding column 29 to slide in the guide groove 28, and the force is uniform, so that the push plate 26 is more stable during movement.

[0053] Please refer to Figure 1 and Figure 10 The carrier frame 6 is at least two mutually parallel telescopic rods 61. Thus, the movement of the object carrying table 7 is facilitated, and other objects in the cabinet compartment 2 are carried.

[0054] Please refer to Figure 10 The telescopic rod 61 comprises a sleeve rod 611 fixedly connected with the sliding sleeve 5, and a plug rod 612 is arranged in sliding connection in the sleeve rod 611, and the plug rod 612 is fixedly connected with the object carrying table 7.

[0055] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A multifunctional logistics cabinet, comprising a cabinet body (1), wherein the cabinet body (1) is provided with a plurality of large cabinet compartments (2) and small cabinet compartments (3) arranged sequentially from top to bottom, characterized in that, A guide rod (4) is fixedly installed on the side of the cabinet (1). A sliding sleeve (5) that moves vertically is fitted on the surface of the guide rod (4). A platform (7) is fixedly installed on the surface of the sliding sleeve (5). A support protrusion (8) for supporting the platform (7) is fixedly installed on the cabinet (1) and below each large cabinet compartment (2). A sealing cylinder (9) with an opening on one side is fixedly installed on the cabinet (1). An air nozzle (10) is fixedly installed on the sealing cylinder (9). Inside the sealing cylinder (9) A sealing plug (11) is slidably installed between the air nozzle (10) and the opening. A steel rope (16) is fixedly installed on the side of the sealing plug (11) away from the air nozzle (10). The end of the steel rope (16) away from the sealing plug (11) is fixedly connected to the sliding sleeve (5). When the sliding sleeve (5) moves downward, the sliding sleeve (5) drives the sealing plug (11) to move away from the air nozzle (10) in the sealing cylinder (9) through the steel rope (16). A venting valve (15) is also installed on the sealing cylinder (9). The vent valve (15) includes a column (151), and the inside of the column (151) is provided with a vent hole (152) communicating with the sealing cylinder (9). The column (151) is provided with a disc (154) for blocking the vent hole (152). A rubber ring is installed at the edge of the disc (154). A shaft (155) is fixedly installed on the side of the disc (154) near the sealing cylinder (9). A limiting frame (156) is sleeved on the surface of the shaft (155). The limiting frame (156) is fixedly connected to the inner wall of the vent hole (152). A first spring (157) is fixedly installed between the peripheral side of the shaft (155) and the limiting frame (156). The first spring (157) is in a stretched state.

2. The multifunctional logistics cabinet according to claim 1, characterized in that, The axis of the sealing cylinder (9) is not parallel to the horizontal line, and the opening of the sealing cylinder (9) faces upward.

3. The multifunctional logistics cabinet according to claim 1, characterized in that, The large cabinet (2) is equipped with a belt drive mechanism (21) for supporting items. The belt drive mechanism (21) includes multiple synchronous pulleys (22) and a synchronous belt (23) meshing with the synchronous pulleys (22).

4. The multifunctional logistics cabinet according to claim 3, characterized in that, A first gear (24) is fixedly installed on the side of the synchronous pulley (22) near the outlet of the large cabinet (2). A second gear (72) for meshing with the first gear (24) is installed on the platform (7). A drive unit (73) for driving the second gear (72) to rotate is installed on the platform (7).

5. The multifunctional logistics cabinet according to claim 4, characterized in that, A push plate (26) for pushing items is fixedly installed on the upper side of the timing belt (23).

6. The multifunctional logistics cabinet according to claim 5, characterized in that, The inner wall of the large cabinet (2) is fixedly installed with a spring assembly (27) for the buffer push plate (26), and the extension and retraction direction of the spring in the spring assembly (27) is the same as the movement direction of the push plate (26).

7. The multifunctional logistics cabinet according to claim 1, characterized in that, The platform (7) is fixedly connected to the sliding sleeve (5) via a support frame (6), and the support frame (6) consists of at least two parallel telescopic rods (61).

8. The multifunctional logistics cabinet according to claim 7, characterized in that, The telescopic rod (61) includes a sleeve rod (611) fixedly connected to the sliding sleeve (5), and an insert rod (612) is slidably arranged inside the sleeve rod (611). The insert rod (612) is fixedly connected to the platform (7).

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