An industrial robot for sorting
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN TRANSPORTATION VOCATIONAL COLLEGE
- Filing Date
- 2025-09-11
- Publication Date
- 2026-08-07
AI Technical Summary
[0004]上述中的现有技术方案存在以下缺陷：因分拣的物品类型大小不一，吸盘在面对小型物品时，小型物品的表面积有限，难以与吸盘形成足够的负压密封环境，吸盘边缘容易与物品表面产生缝隙，导致外界空气持续渗入，负压值快速下降，吸附力随之减弱，导致吸盘吸附固定不牢固，导致分拣过程中出现小型物品遗漏的现象，不仅需要额外投入人力进行二次检查和回收，还会降低分拣效率与精度
1.通过设置了支撑柱、横柱、转动电机、安装板及夹持组件，夹持组件包括第一电动推杆、安装柱、第二电动推杆、伸缩孔、伸缩柱、夹持爪，能够通过支撑柱和横柱形成稳定的支撑结构，转动电机带动安装板转动实现位置调整，第一电动推杆带动安装柱上下移动，第二电动推杆驱动伸缩柱在伸缩孔内滑动，进而驱动夹持爪实现对物品的夹持，适用于小型物品的分拣，提升分拣适用性；
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Figure CN224599922U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of industrial robot technology, and in particular to an industrial robot for sorting. Background Technology
[0002] Currently, sorting is an important and tedious task in industrial production. With the development of industrial automation, various automated sorting equipment has emerged. Sorting robots are mainly used to clamp and sort industrial products.
[0003] Existing industrial robots for sorting items use multiple extendable vacuum suction cups to adsorb and fix items. The suction cups adhere to the surface of the items, and then the air between the suction cups and the items is removed to create negative pressure. Atmospheric pressure is then used to firmly fix the items. After being adsorbed and fixed, the items are rotated to perform sorting work.
[0004] The existing technical solutions mentioned above have the following drawbacks: because the types and sizes of the items to be sorted vary, when the suction cup is facing small items, the surface area of the small items is limited, making it difficult to form a sufficient negative pressure sealing environment with the suction cup. Gaps are easily formed between the edge of the suction cup and the surface of the item, causing outside air to continuously seep in, the negative pressure value to drop rapidly, and the suction force to weaken accordingly. This results in the suction cup not adhering firmly, leading to the phenomenon of small items being missed during the sorting process. This not only requires additional manpower for secondary inspection and recycling, but also reduces sorting efficiency and accuracy. Utility Model Content
[0005] In view of this, the purpose of this utility model is to provide an industrial robot for sorting, so as to improve sorting efficiency.
[0006] This application provides an industrial robot for sorting, comprising: a vertically arranged support column, a horizontal cross column arranged at the upper end of the support column, a rotating motor arranged on the cross column away from the upper side wall of the support column, a mounting plate arranged below the cross column and connected to the rotating shaft of the rotating motor, and a clamping assembly arranged at one end of the mounting plate. The clamping assembly includes a first electric push rod arranged at the end of the mounting plate with its piston rod movably passing through the mounting plate, and a mounting column arranged below the mounting plate and connected to the piston rod of the first electric push rod. A second electric push rod is arranged inside the mounting column. A telescopic hole is coaxially opened on the lower end face of the mounting column. A telescopic column is slidably arranged in the telescopic hole. The telescopic column is connected to the piston rod of the second electric push rod. A clamping claw is hinged to the peripheral wall of the telescopic column. When the telescopic column moves closer to the mounting column, the end of the clamping claw can clamp the item.
[0007] By adopting the above technical solution, and by setting up a support column, a cross column, a rotating motor, a mounting plate, and a clamping assembly, the clamping assembly includes a first electric push rod, a mounting column, a second electric push rod, a telescopic hole, a telescopic column, and clamping claws. The support column and the cross column can form a stable support structure. The rotating motor drives the mounting plate to rotate to achieve position adjustment. The first electric push rod drives the mounting column to move up and down. The second electric push rod drives the telescopic column to slide within the telescopic hole, thereby driving the clamping claws to clamp the items. This is suitable for sorting small items and improves sorting applicability.
[0008] Optionally, the clamping claw consists of a vertical and strip-shaped clamping plate and a triangular plate fixed to the upper side wall of the clamping plate. The side wall of the triangular plate is fixed to the side wall of the clamping plate. The corner of the triangular plate away from the clamping plate is hinged to the periphery of the telescopic column through a hinge seat. The outer edge of the lower end face of the mounting column is processed into a conical shape, and the side wall of the triangular plate can slide and fit against the conical edge of the lower end face of the mounting column.
[0009] By adopting the above technical solution, and by setting up a clamping claw composed of a clamping plate and a triangular plate, a hinge seat, and a mounting column with a conical edge at the lower end, the triangular plate can be hinged to the telescopic column through the hinge seat, and the side wall of the triangular plate slides against the conical edge of the mounting column. When the telescopic column moves, the triangular plate slides along the conical edge, causing the clamping plate to open and close. The clamping claw clamps small items, making the clamping action more stable and enhancing the clamping effect on the items.
[0010] Optionally, the clamping claws are provided with four claws, which are arranged in a cross shape with the telescopic column axis as the center.
[0011] By adopting the above technical solution, and by setting four gripping claws arranged in a cross shape with the telescopic column axis as the center, items can be gripped from four different directions, increasing the contact points with the items, improving the stability of gripping small items, and adapting to the sorting needs of small items of different shapes.
[0012] Optionally, the clamping plate is vertically arranged with its lower end away from the mounting post. The sidewall between the upper and lower ends of the clamping plate is bent to create two spaced arcs facing opposite directions. The lower ends of the four clamping plates are far apart from each other, and the sidewall of the triangular plate is fixedly connected to the upper sidewall of the clamping plate.
[0013] By adopting the above technical solution and setting a clamping plate with curved sidewalls, the curved sidewalls can better fit the surface of the object, and the structure with the lower ends far apart makes it easier for the clamping claws to adapt to the size of the object when opening and closing, thus improving the clamping fit and flexibility.
[0014] Optionally, all corners of the clamping plate are chamfered.
[0015] By adopting the above technical solution and setting up a clamping plate with chamfered edges, the scraping of the object's surface when the clamping plate comes into contact with the object can be reduced, thus reducing the possibility of damage to the object's surface and protecting the object's appearance.
[0016] Optionally, the hinge seat and the lower end face of the telescopic column are spaced apart, and a circular mounting hole is opened between the hinge seat and the lower end face of the telescopic column. A spring is installed in the mounting hole, one end of the spring is fixedly connected to the bottom of the mounting hole, and the other end of the spring is fixedly connected to the side wall of the triangular plate.
[0017] By adopting the above technical solution and setting a spring, the spring force can be used to drive the triangular plate to reset when the clamping claw is released, so that the clamping claw automatically opens, which is convenient for the next clamping operation. At the same time, it provides a certain buffer during the clamping process, making the clamping force more moderate.
[0018] Optionally, a counterweight is fixed to the lower side wall of the end of the crossbar near the support column.
[0019] By adopting the above technical solution and setting counterweights, the weight at both ends of the crossbar can be balanced, alleviating the structural tilting tendency caused by the weight difference at both ends of the crossbar and enhancing the overall structural stability of the industrial robot.
[0020] Optionally, the lower end face of the support column is provided with a disc-shaped rotating seat.
[0021] By adopting the above technical solution and setting a rotating seat, the support column and the above horizontal column, mounting plate and other structures can rotate around the rotating seat, realizing the transfer of sorted items to different locations and improving the flexibility of sorting operations.
[0022] Optionally, an annular mounting flange is coaxially fixed to the lower end of the peripheral wall of the rotating seat.
[0023] By adopting the above technical solution and setting the mounting flange, the rotating seat can be easily fixed on the mounting base, which enhances the stability of the industrial robot after installation and facilitates the quick completion of equipment installation and fixing.
[0024] In summary, this application has the following technical effects: 1. By setting up a support column, a cross column, a rotating motor, a mounting plate, and a clamping assembly, the clamping assembly includes a first electric push rod, a mounting column, a second electric push rod, a telescopic hole, a telescopic column, and clamping claws. The support column and cross column form a stable support structure. The rotating motor drives the mounting plate to rotate to achieve position adjustment. The first electric push rod drives the mounting column to move up and down. The second electric push rod drives the telescopic column to slide in the telescopic hole, thereby driving the clamping claws to clamp the items. It is suitable for sorting small items and improves sorting applicability. 2. By setting up a clamping claw consisting of a clamping plate and a triangular plate, a hinge seat, and a mounting column with a conical edge at the lower end, the triangular plate can be hinged to the telescopic column through the hinge seat, and the side wall of the triangular plate slides against the conical edge of the mounting column. When the telescopic column moves, the triangular plate slides along the conical edge, causing the clamping plate to open and close. The clamping claw clamps small items, making the clamping action more stable and enhancing the clamping effect on the items. 3. By setting up four gripping claws arranged in a cross shape with the telescopic column axis as the center, it can grip items from four different directions, increasing the contact points with the items, improving the stability of gripping small items, and adapting to the sorting needs of small items of different shapes.
[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a structural diagram of the object of this application; Figure 2 This is a structural diagram of the clamping component of this application; Figure 3 This is a structural diagram of the adsorption component of this application.
[0028] Explanation of reference numerals in the attached drawings: 1. Base; 11. Rotating seat; 111. Mounting flange; 12. Support column; 13. Horizontal column; 131. Counterweight; 14. Rotating motor; 15. Mounting plate; 2. Clamping assembly; 21. First electric push rod; 22. Mounting column; 221. Telescopic hole; 23. Second electric push rod; 24. Telescopic column; 241. Connecting column; 242. Hinge seat; 243. Mounting hole; 25. Clamping claw; 251. Clamping plate; 252. Triangular plate; 3. Adsorption assembly; 31. Third electric push rod; 32. Moving plate; 33. Fixing tube; 331. Suction cup; 34. Vacuum pump; 35. Connecting tube. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0030] This application discloses an industrial robot for sorting, referring to... Figure 1 The industrial robot includes a rotatable base 1, a gripping component 2 and an adsorption component 3 mounted on the base 1. The rotatable base 1 facilitates the sorting of items to different positions. When dealing with small items, the gripping component 2 is used for gripping and fixing the items for sorting. When dealing with large items, the adsorption component 3 is used for adsorption and fixing the items for sorting. This reduces the possibility of small items being missed during sorting and improves sorting efficiency.
[0031] Reference Figure 1 The base 1 includes a disc-shaped, horizontally rotating seat 11, a support column 12 vertically mounted on the upper surface of the rotating seat 11, a horizontal column 13 horizontally mounted on the upper end of the support column 12, a rotating motor 14 mounted on the upper side wall of the horizontal column 13 and away from the support column 12, and a horizontally mounted mounting plate 15 mounted on the end of the output shaft of the rotating motor 14. A ring-shaped mounting flange 111 is coaxially fixed to the lower end of the peripheral wall of the rotating seat 11 for easy installation of the industrial robot. Both the support column 12 and the horizontal column 13 are square columns. The side wall of the horizontal column 13 is fixed to the end face of the support column 12. The horizontal column 13 and the support column 12 form a T-shape, and the distances between the two end faces of the horizontal column 13 and the support column 12 are different.
[0032] Reference Figure 1 A vertical counterweight 131 is fixed to the lower side wall of the end of the cross column 13 near the support column 12. The counterweight 131 can reduce the possibility of the industrial robot tipping over due to the weight difference at both ends of the cross column 13. The housing of the rotary motor 14 is fixed to the upper side wall of the cross column 13. The output shaft of the rotary motor 14 is vertically downward, and the end of the output shaft of the rotary motor 14 passes through the cross column 13 and is located below the cross column 13. The mounting plate 15 is a strip plate. The middle part of the upper surface of the mounting plate 15 is fixed to the end face of the output shaft of the rotary motor 14, and the upper surface of the mounting plate 15 is spaced apart from the cross column 13.
[0033] Combination Figure 1 and Figure 2The clamping assembly 2 includes a first electric push rod 21 disposed at one end of the upper surface of the mounting plate 15, a mounting post 22 disposed below the mounting plate 15 and connected to the first electric push rod 21, a second electric push rod 23 disposed inside the mounting post 22, a telescopic post 24 slidably disposed inside the mounting post 22 and connected to the second electric push rod 23, and a clamping claw 25 hinged to the periphery of the telescopic post 24. The outer shell of the first electric push rod 21 is fixedly connected to the upper surface of the mounting plate 15, the push rod of the first electric push rod 21 is vertically downward, and the end of the push rod of the first electric push rod 21 passes through the mounting plate 15 and is located below the mounting plate 15. The mounting post 22 is a cylinder, the mounting post 22 is vertically arranged, and the upper end face of the mounting post 22 is coaxially fixedly connected to the end of the push rod of the first electric push rod 21. The first electric push rod 21 can drive the mounting post 22 to move along its axial direction.
[0034] Combination Figure 1 and Figure 2 The mounting column 22 has a circular telescopic hole 221 coaxially formed at its lower end. A mounting cavity is coaxially formed inside the mounting column 22, spaced from the bottom of the telescopic hole 221. A second electric push rod 23 is disposed in the mounting cavity, with its push rod pointing vertically downwards. The end of the push rod of the second electric push rod 23 passes through the mounting column 22 and is located within the telescopic hole 221. The push rod of the second electric push rod 23 is coaxially arranged with the telescopic hole 221. The telescopic column 24 is cylindrical and fits into the telescopic hole 221. The upper end of the telescopic column 24 is slidably disposed within the telescopic hole 221, while the lower end of the telescopic column 24 is located outside the mounting column 22. A connecting column 241 is coaxially fixed to the upper end face of the telescopic column 24. The connecting column 241 is cylindrical, with one end fixed to the upper end face of the telescopic column 24 and the other end fixed to the end face of the push rod of the second electric push rod 23.
[0035] Combination Figure 1 and Figure 2Four hinge seats 242 are spaced apart on the lower end of the perimeter wall of the telescopic column 24. Each hinge seat 242 is composed of two square plates arranged opposite each other. The four hinge seats 242 are arranged in a cross shape on the perimeter wall of the telescopic column 24 with the telescopic column 24 as the center. The hinge seats 242 are spaced apart from the lower end face of the telescopic column 24. When the upper end of the telescopic column 24 abuts against the telescopic hole 221, the hinge seats 242 are spaced apart from the lower end face of the mounting column 22. The clamping claw 25 consists of a strip-shaped clamping plate 251 and a triangular plate 252 fixed to the side wall of the clamping plate 251. The clamping plate 251 is vertically arranged. The side wall between the upper and lower ends of the clamping plate 251 is curved to create two spaced arcs facing opposite directions. The upper side wall of the clamping plate 251 is parallel to the lower side wall. The longest side wall of the triangular plate 252 is fixed to the upper side wall of the clamping plate 251. The two surfaces of the triangular plate 252 are flush with the two surfaces of the clamping plate 251. There are four clamping claws 25, which are respectively hinged to four hinge seats 242. The corners of the triangular plate 252 away from the clamping plate 251 are located in the two square plates of the hinge seat 242, and the two surfaces are parallel to each other. The hinge seat 242 and the triangular plate 252 are both connected to the same hinge shaft.
[0036] Combination Figure 1 and Figure 2 The lower ends of the four clamping plates 251 are spaced far apart, and the corners of the clamping plates 251 are all chamfered to reduce the possibility of damaging the items when clamping them. The corners of the triangular plate 252 away from the clamping plates 251 are also chamfered to facilitate the rotation of the clamping claws 25. The outer edge of the lower end face of the mounting post 22 is machined into a conical shape, and the side wall of the triangular plate 252 near the mounting post 22 can slide and fit against the conical edge of the lower end face of the mounting post 22. When small items need to be sorted, the mounting plate 15 is rotated by rotating the motor 14, so that the clamping assembly 2 is positioned above the small items. The first electric push rod 21 moves the mounting post 22 and the clamping claws 25 closer to the small items, and the second electric push rod 23 moves the telescopic post 24 closer to the bottom of the telescopic hole 221. The side wall of the triangular plate 252 slides and fits against the edge of the lower end face of the mounting post 22, driving the lower ends of the four clamping plates 251 to move closer simultaneously to clamp the small items. The telescopic column 24 has a circular mounting hole 243 on its periphery. The mounting hole 243 is located between the hinge seat 242 and the lower end face of the telescopic column 24. The mounting hole 243 is inclined and its bottom is close to the mounting column 22. A spring is installed in the mounting hole 243. One end of the spring is fixed to the bottom of the mounting hole 243, and the other end of the spring is fixed to the side wall of the triangular plate 252. The spring always provides the triangular plate 252 with an extension force.
[0037] Combination Figure 1 and Figure 3The adsorption assembly 3 includes a third electric push rod 31 disposed on the upper surface of the mounting plate 15 and away from the end of the first electric push rod 21; a horizontally moving plate 32 disposed below the mounting plate 15 and connected to the third electric push rod 31; four fixed tubes 33 disposed on the lower surface of the moving plate 32; a suction cup 331 disposed on the lower end surface of the fixed tubes 33; and two vacuum pumps 34 disposed on the upper surface of the moving plate 32. The housing of the third electric push rod 31 is fixedly connected to the upper surface of the mounting plate 15. The push rod of the third electric push rod 31 is vertically downward, and the end of the push rod of the third electric push rod 31 penetrates into the mounting plate 15 and is located below the mounting plate 15. Neither the first electric push rod 21 nor the third electric push rod 31 contacts the horizontal column 13.
[0038] Combination Figure 1 and Figure 3 The movable plate 32 is a square plate. The middle of the upper surface of the movable plate 32 is fixedly connected to the end face of the push rod of the third electric push rod 31. The third electric push rod 31 can drive the movable plate 32 to move vertically. The fixed tubes 33 are vertically arranged, and the upper end face of the fixed tubes 33 is fixedly connected to the lower surface of the movable plate 32. The four fixed tubes 33 are distributed in a rectangle and are located near the four corners of the lower surface of the movable plate 32. The suction cup 331 is conical. The end of the suction cup 331 with the smaller diameter is coaxially fixedly connected to the lower end face of the fixed tube 33. The suction cup 331 is connected to the fixed tube 33. The vacuum pumps 34 are spaced apart from the third electric push rod 31. The two vacuum pumps 34 are arranged opposite each other and are located on both sides of the third electric push rod 31. Each vacuum pump 34 is connected to the inside of the two fixed tubes 33 through a connecting pipe 35.
[0039] Combination Figures 1 to 3 A controller is installed on the upper side wall of the support column 12. The controller is electrically connected to the rotating motor 14, the first electric push rod 21, the second electric push rod 23 and the third electric push rod 31.
[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. An industrial robot for sorting, characterized in that: It includes a vertically arranged support column (12), a horizontal column (13) arranged at the upper end of the support column (12) and horizontally arranged, a rotating motor (14) arranged on the upper side wall of the horizontal column (13) away from the support column (12), a mounting plate (15) arranged below the horizontal column (13) and connected to the rotating shaft of the rotating motor (14), and a clamping assembly (2) arranged at one end of the mounting plate (15); The clamping assembly (2) includes a first electric push rod (21) disposed on the upper end of the mounting plate (15) with its piston rod movably passing through the mounting plate (15) and a mounting column (22) disposed below the mounting plate (15) and connected to the piston rod of the first electric push rod (21). A second electric push rod (23) is disposed inside the mounting column (22). A telescopic hole (221) is coaxially opened on the lower end face of the mounting column (22). A telescopic column (24) is slidably disposed inside the telescopic hole (221). The telescopic column (24) is connected to the piston rod of the second electric push rod (23). A clamping claw (25) is hinged to the periphery of the telescopic column (24). When the telescopic column (24) moves closer to the mounting column (22), the end of the clamping claw (25) can clamp the item.
2. An industrial robot for sorting according to claim 1, characterized in that: The clamping claw (25) consists of a vertical and strip-shaped clamping plate (251) and a triangular plate (252) fixed to the upper side wall of the clamping plate (251). The side wall of the triangular plate (252) is fixed to the side wall of the clamping plate (251). The corner of the triangular plate (252) away from the clamping plate (251) is hinged to the periphery of the telescopic column (24) through a hinge seat (242). The outer edge of the lower end face of the mounting column (22) is processed into a conical shape. The side wall of the triangular plate (252) can slide and fit against the conical edge of the lower end face of the mounting column (22).
3. An industrial robot for sorting according to claim 2, characterized in that: The clamping claws (25) are provided in four shapes, and the four clamping claws (25) are arranged in a cross shape with the axis of the telescopic column (24) as the center.
4. An industrial robot for sorting according to claim 3, characterized in that: The clamping plate (251) is vertically arranged and its lower end is far away from the mounting column (22). The side wall between the upper and lower ends of the clamping plate (251) is bent to create two spaced arcs facing opposite directions. The lower ends of the four clamping plates (251) are far away from each other, and the side wall of the triangular plate (252) is fixedly connected to the upper side wall of the clamping plate (251).
5. An industrial robot for sorting according to claim 4, characterized in that: All corners of the clamping plate (251) are chamfered.
6. An industrial robot for sorting according to claim 5, characterized in that: The hinge seat (242) and the lower end face of the telescopic column (24) are spaced apart. A circular mounting hole (243) is opened between the hinge seat (242) and the lower end face of the telescopic column (24). A spring is installed in the mounting hole (243). One end of the spring is fixed to the bottom of the mounting hole (243), and the other end of the spring is fixed to the side wall of the triangular plate (252).
7. An industrial robot for sorting according to claim 1, characterized in that: A counterweight (131) is fixed to the lower side wall of the end of the horizontal column (13) near the support column (12).
8. An industrial robot for sorting according to claim 7, characterized in that: The lower end face of the support column (12) is provided with a disc-shaped rotating seat (11).
9. An industrial robot for sorting according to claim 8, characterized in that: The lower end of the peripheral wall of the rotating seat (11) is coaxially fixed with an annular mounting flange (111).