Fastening system for coaxial multiple bolts

Abstract

The coaxial multi-bolt fastening system comprises a frame body, a plurality of floating frame assemblies, a plurality of shaft rotation driving pieces, a rotation driving assembly and a radial adjusting assembly, the frame body is provided with a vertically-arranged installation disc, the floating frame assemblies are all assembled on one side of the installation disc and distributed on the same circumference, and the shaft rotation driving pieces are arranged on the installation disc. The radial adjusting assembly is installed on the installation disc, connected with the floating frame assemblies and used for synchronously driving the floating frame assemblies to synchronously move outwards or inwards in the radial direction, the shaft rotation driving pieces are installed on the floating frame assemblies in a one-to-one correspondence mode, and the same ends of the shaft rotation driving pieces are connected with the air screwdriver sleeves respectively. The rotation driving assembly is in transmission connection with the multiple sets of shaft rotation driving pieces and used for driving the multiple sets of shaft rotation driving pieces to drive the corresponding air screwdriver sleeves to rotate synchronously in the same direction. The device has the advantages that the function of synchronous tightening or loosening of multiple coaxial bolts can be achieved, the whole assembling process can be fast, and the bolt torque is more balanced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly technology, and in particular to a coaxial multi-bolt fastening system. Background Technology

[0002] During the assembly of agricultural machinery such as harvesters, it is necessary to tighten or loosen multiple bolts that are distributed coaxially. The conventional assembly method involves manually moving the parts to be assembled (such as wheels, flanges, etc.) to the vicinity of the parts to be assembled, loosening each bolt onto the part first, and then manually tightening them one by one using an electric wrench or a manual wrench. After each tightening, the torque of each bolt needs to be adjusted to achieve balance, which reduces efficiency and is labor-intensive.

[0003] Therefore, it is necessary to develop a coaxial multi-bolt fastening system to overcome the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a coaxial multi-bolt fastening system, which effectively overcomes the defects of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A coaxial multi-bolt fastening system includes a frame, multiple floating frame assemblies, multiple sets of shaft rotation drives, a rotation drive assembly, and a radial adjustment assembly. The frame has a vertically arranged mounting plate. The multiple floating frame assemblies are all assembled on one side of the mounting plate and distributed on the same circumference. The radial adjustment assembly is mounted on the mounting plate and connected to the multiple floating frame assemblies for synchronously driving the multiple floating frame assemblies to move outward or inward radially. The multiple shaft rotation drives are respectively mounted on the multiple floating frame assemblies one-to-one. A screwdriver sleeve is connected to the same end of each of the multiple shaft rotation drives. The rotation drive assembly is connected to the multiple shaft rotation drives for driving the multiple shaft rotation drives to drive the corresponding screwdriver sleeves to rotate synchronously in the same direction.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the frame includes two uprights and a base plate. The two uprights are fixed vertically and at intervals to the upper part of the base plate. The two sides of the mounting plate are respectively connected and fixed to the upper ends of the two uprights. The uprights are telescopic uprights.

[0009] Furthermore, it also includes a mobile carrier, which is provided with a track parallel to the rotation center line of the shaft rotation drive member. The base plate is mounted on the track and can slide along the track. A drive member is mounted on one side of the base plate to push it to move along the track.

[0010] Furthermore, the aforementioned floating frame assembly includes a fixed plate, a movable plate, and two guide rods. The fixed plate is fixed to one outer edge of the mounting plate. The movable plate is arranged parallel to the fixed plate on the side near the center of the mounting plate. The two guide rods are arranged parallel and spaced apart, with one end of each rod perpendicularly connected and fixed to the movable plate. The other ends of the two guide rods pass through the fixed plate. Limiting plates are provided at the other ends of the two guide rods. An elastic element connects the fixed plate and the movable plate. A strip-shaped connecting rod extending radially along the circumference is provided in the middle of the movable plate. The mounting plate has strip-shaped holes corresponding to the connecting rods. The shaft rotation drive is mounted on the connecting rod and passes through the strip-shaped holes. The radial adjustment assembly is connected to multiple sets of connecting rods of the aforementioned floating frame assembly.

[0011] Furthermore, the aforementioned radial adjustment assembly includes a first rotary drive device and an indexing positioning plate. The indexing positioning plate is rotatably mounted at the center of one side of the mounting plate and is coaxially distributed with multiple sets of the aforementioned shaft rotary drive components. The first rotary drive device is mounted at the center of the other side of the mounting plate and is connected to the rotation center of the indexing positioning plate. The outer edge of the indexing positioning plate is provided with multiple limiting pieces along its circumferential direction, each corresponding to one of the multiple sets of the aforementioned connecting rods. The multiple limiting pieces are provided with a straight section on the same side along the circumferential direction and an arc section on the other side, and the arc section is provided with multiple continuously distributed arc-shaped slots. The end of the aforementioned connecting rod contacts the outer edge of the aforementioned indexing positioning plate. The first rotary drive device is used to drive the indexing positioning plate to rotate, and during the rotation, the end of the aforementioned connecting rod slides along the edges of the multiple limiting pieces one by one, thereby realizing the radial movement of the aforementioned floating frame assembly driving the shaft rotary drive components.

[0012] Furthermore, the aforementioned elastic element is a spring, which is fitted onto the aforementioned guide rod.

[0013] Furthermore, the aforementioned shaft rotation drive includes an electric pneumatic screwdriver structure.

[0014] Furthermore, the aforementioned rotary drive assembly includes a support frame, a second rotary drive device, a gear transmission assembly, and multiple telescopic universal drive shafts. The support frame is mounted on the other side of the mounting plate, the second rotary drive device is mounted on the support frame and is connected to the gear transmission assembly. One end of each of the multiple telescopic universal drive shafts is connected to the other end of each of the multiple sets of shaft rotary drive components, and the other end of each of the multiple telescopic universal drive shafts is connected to the gear transmission assembly. The second rotary drive device is used to drive the gear transmission assembly to operate, thereby driving the multiple sets of shaft rotary drive components to operate through the multiple telescopic universal drive shafts, and realizing the synchronous and unidirectional rotation of the multiple pneumatic screwdriver sleeves.

[0015] Furthermore, the aforementioned gear transmission assembly includes a driving gear and multiple driven gears. The driving gear is connected to the aforementioned second rotary drive device. The multiple driven gears are respectively mounted on the aforementioned support frame via shaft rotation and are distributed around the driving gear. The driving gear meshes with the driven gears. The other ends of the multiple telescopic universal drive shafts are respectively connected to the shafts of the multiple driven gears.

[0016] Furthermore, the aforementioned support frame includes a first mounting plate and a second mounting plate that are parallel to each other. The first mounting plate and the second mounting plate are arranged parallel to each other on the other side of the aforementioned mounting plate. The edges of the first mounting plate and the second mounting plate are connected together to a diagonal brace that is fixed to the aforementioned mounting plate. The aforementioned driving gear and driven gear are respectively disposed between the first mounting plate and the second mounting plate. The aforementioned driven gear is rotatably connected to the first mounting plate and the second mounting plate through a shaft. The aforementioned second rotary drive device is mounted on the first mounting plate or the second mounting plate, and its drive end extends into the center between the first mounting plate and the second mounting plate and is connected to the driving gear for transmission.

[0017] The beneficial effects of this utility model are: the structure is reasonably designed and can realize the function of simultaneous tightening or loosening of multiple coaxial bolts, making the entire assembly process faster and the bolt torque more balanced. Attached Figure Description

[0018] Figure 1 This is a front view of the structure of the coaxial multi-bolt fastening system of this utility model;

[0019] Figure 2 This is a rear view of the structure of the coaxial multi-bolt fastening system of this utility model;

[0020] Figure 3 This is a side view of the structure of the coaxial multi-bolt fastening system of this utility model;

[0021] Figure 4This is a bottom view of the structure of the coaxial multi-bolt fastening system of this utility model;

[0022] Figure 5 This is a side view of another embodiment of the present invention for a coaxial multi-bolt fastening system.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Frame; 2. Floating frame assembly; 3. Shaft rotation drive component; 4. Mounting plate; 5. Moving carrier; 11. Column; 12. Base plate; 21. Fixed plate; 22. Movable plate; 23. Guide rod; 24. Elastic element; 25. Connecting rod; 41. Strip hole; 61. First rotation drive device; 62. Indexing and positioning plate; 71. Support frame; 72. Second rotation drive device; 73. Telescopic universal drive shaft; 74. Drive gear; 75. Driven gear; 621. Limiting plate; 711. First mounting plate; 712. Second mounting plate. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0026] Example

[0027] like Figure 1 , 2 As shown in Figures 3 and 4, the coaxial multi-bolt fastening system of this embodiment includes a frame 1, multiple sets of floating frame assemblies 2, multiple sets of shaft rotation drive components 3, a rotation drive assembly, and a radial adjustment assembly. The frame 1 has a vertically arranged mounting plate 4. The multiple sets of floating frame assemblies 2 are all assembled on one side of the mounting plate 4 and distributed on the same circumference. The radial adjustment assembly is mounted on the mounting plate 4 and connected to the multiple sets of floating frame assemblies 2, and is used to synchronously drive the multiple sets of floating frame assemblies 2 to move outward or inward in a radial direction. The multiple sets of shaft rotation drive components 3 are respectively mounted on the multiple sets of floating frame assemblies 2. The same end of the multiple sets of shaft rotation drive components 3 is respectively connected to a screwdriver sleeve. The rotation drive assembly is respectively connected to the multiple sets of shaft rotation drive components 3 for driving the multiple sets of shaft rotation drive components 3 to drive the corresponding screwdriver sleeves to rotate synchronously in the same direction.

[0028] In this embodiment of the coaxial multi-bolt fastening system, multiple floating frame assemblies 2 are distributed on the same circumference with the center of the mounting plate 4 as the center. Multiple shaft rotation drive components 3 are also distributed on the same circumference, as are multiple pneumatic screwdriver sleeves. The axes of the three circumferences coincide, allowing the pneumatic screwdriver sleeves to be fitted onto multiple coaxially distributed bolts on a flange or wheel for nut installation and removal. Specifically, when fitting the bolts with pneumatic screwdriver sleeves, the radial displacement of the multiple floating frame assemblies 2 is first synchronously adjusted via the radial adjustment assembly (i.e., the radial displacement of the multiple shaft rotation drive components 3 is adjusted to increase or decrease the radius of the circumference of the multiple shaft rotation drive components 3 to match the radius of the multiple bolts on the flange or wheel). Then, after the pneumatic screwdriver sleeves are fitted onto the nuts, the rotation drive assembly is activated to synchronously drive the multiple shaft rotation drive components 3 to rotate synchronously in the same direction, thereby causing the multiple pneumatic screwdriver sleeves to synchronously tighten or loosen the nuts in the same direction. The overall structure is reasonably designed, enabling the simultaneous tightening or loosening of multiple coaxial bolts, which makes the entire assembly process quick and the bolt torque more balanced.

[0029] In this embodiment, the frame 1 includes two uprights 11 and a base plate 12. The two uprights 11 are vertically and spaced apart from each other on the upper end of the base plate 12. The two sides of the mounting plate 4 are respectively connected and fixed to the upper ends of the two uprights 11. The uprights 11 are telescopic uprights. The frame 1 has a simple overall structure and can provide stable support. The telescopic movement of the uprights 11 can adjust the height, so that the height of the multi-axis rotation drive 3 and the pneumatic screwdriver sleeve can be adapted to the height of the multiple coaxially distributed bolts and nuts on the wheels or flanges.

[0030] The column 11 can be designed as two interlocking tubular sections, with an electric or hydraulic push rod inside to extend and adjust the height of the column 11.

[0031] In this embodiment, the mounting disk 4 is a circular disk, and it is coaxially distributed with multiple sets of axis rotation drive components 3.

[0032] As a preferred implementation method, such as Figure 5 As shown, it also includes a mobile carrier 5, which is provided with a track parallel to the rotation center line of the shaft rotation drive 3. The base plate 12 is mounted on the track and can slide along the track. A drive member m that pushes the base plate 12 to move along the track is mounted on one side of the base plate 12.

[0033] In the above implementation scheme, the displacement of the base plate 12 along the track a is adjusted by the driving component to meet the displacement feed amount when the shaft rotation driving component 3 drives the nut to rotate, which is simple and convenient to operate.

[0034] More specifically, the mobile carrier 5 can be a platform with casters at the bottom.

[0035] Of course, the aforementioned driving components can be handrails or electric propulsion devices, such as cylinders, hydraulic cylinders, electric push rods, etc.

[0036] In a preferred embodiment, the floating frame assembly 2 includes a fixed plate 21, a movable plate 22, and two guide rods 23. The fixed plate 21 is fixed to one outer edge of the mounting plate 4. The movable plate 22 is arranged parallel to the fixed plate 21 on the side near the center of the mounting plate 4. The two guide rods 23 are arranged parallel and spaced apart, with one end of each rod perpendicularly connected and fixed to the movable plate 22. The other ends of the two guide rods 23 pass through the fixed plate 21. Limiting plates are provided at the ends of the other two guide rods 23. An elastic element 24 connects the fixed plate 21 and the movable plate 22. A strip-shaped connecting rod 25 extending radially along the circumference is provided in the middle of the movable plate 22. The mounting plate 4 is provided with strip-shaped holes 41 corresponding to the connecting rods 25. The shaft rotation drive 3 is mounted on the connecting rods 25 and passes through the strip-shaped holes 41. The radial adjustment assembly is connected to multiple sets of connecting rods 25 of the floating frame assembly 2.

[0037] In the above implementation scheme, the radial adjustment assembly can drive the connecting rod 25 to move radially inward and outward along the circumference of the multiple floating frame assemblies 2. During the movement, the shaft rotation drive 3 moves in the strip hole 41 of the mounting plate 4. Specifically, during the outward movement, the elastic element 24 is compressed, and during the inward movement, the elastic element 24 rebounds to return to its original position.

[0038] In a preferred embodiment, the radial adjustment assembly includes a first rotary drive device 61 and an indexing positioning plate 62. The indexing positioning plate 62 is rotatably mounted at the center of one side of the mounting plate 4 and is coaxially distributed with multiple sets of shaft rotary drive components 3. The first rotary drive device 61 is mounted at the center of the other side of the mounting plate 4 and is connected to the rotation center of the indexing positioning plate 62. The outer edge of the indexing positioning plate 62 is provided with multiple limiting positions along its circumference that correspond one-to-one with multiple sets of connecting rods 25. The limiting plates 621 are arranged with a straight section on the same side along the circumferential direction and an arc section on the other side. The arc section is provided with a plurality of continuously distributed arc-shaped slots. The end of the connecting rod 25 contacts the outer edge of the indexing positioning disk 62. The first rotary drive device 61 is used to drive the indexing positioning disk 62 to rotate. During the rotation, the end of the connecting rod 25 slides along the edge of the plurality of limiting plates 621 one by one, thereby realizing the radial movement of the floating frame assembly 2 driving shaft rotation drive 3.

[0039] In the above implementation scheme, the number of limiting plates 621 is designed to match the number of connecting rods 25. When the axial rotation drive 3 reaches its minimum radial displacement, the end of the connecting rod 25 is embedded in the slot formed between two adjacent limiting plates 621. When the radius needs to be increased, the first rotation drive device 61 drives the indexing positioning disk 62 to rotate, and multiple connecting rods 25 will slide relative to each other along the edge of the arc segment of their respective corresponding limiting plate 621 until they reach the position where the radius of the limiting plate 621 is at its maximum. If the rotation continues, the connecting rod 25 will move inward along the straight section into the slot defined between the two limiting plates 621, and the maximum radius of the circumference of the axial rotation drive 3 will return to its minimum. During the radius increase adjustment process, the end of the connecting rod 25 will pass through each arc-shaped groove on the arc segment. When the displacement stops at any point, the end of the connecting rod 25 will engage with the corresponding arc-shaped groove, playing a role in maintaining a certain position. The overall design is very ingenious, and the operation is simple and convenient.

[0040] In this embodiment, the first rotary drive device 61 can be a servo motor of an appropriate model.

[0041] In this embodiment, the elastic element 24 is a spring and is fitted onto the guide rod 23. The structures are tightly assembled and the elastic performance is relatively stable.

[0042] In this embodiment, the shaft rotation drive 3 includes an electric pneumatic screwdriver structure. More specifically, the shaft rotation drive 3 adopts an electric pneumatic screwdriver structure without a motor, with one end connected to a pneumatic screwdriver sleeve and the other end having an exposed drive shaft that is connected to the rotation drive assembly for transmission.

[0043] In a preferred embodiment, the rotary drive assembly includes a support frame 71, a second rotary drive device 72, a gear transmission assembly, and multiple telescopic universal drive shafts 73. The support frame 71 is mounted on the other side of the mounting plate 4. The second rotary drive device 72 is mounted on the support frame 71 and is connected to the gear transmission assembly. One end of each of the multiple telescopic universal drive shafts 73 is connected to the other end of each of the multiple sets of shaft rotary drive members 3. The other ends of the multiple telescopic universal drive shafts 73 are connected to the gear transmission assembly. The second rotary drive device 72 is used to drive the gear transmission assembly to operate, thereby driving the multiple sets of shaft rotary drive members 3 through the multiple telescopic universal drive shafts 73 to achieve synchronous and unidirectional rotation of the multiple air screwdriver sleeves.

[0044] In the above implementation scheme, the second rotary drive device 72 drives the gear transmission assembly to drive multiple telescopic universal drive shafts 73 to rotate synchronously and in the same direction, thereby realizing the synchronous and unidirectional operation of the pneumatic screwdriver sleeve driven by multiple shaft rotary drive components 3. The overall structure design is simple and the operation is stable.

[0045] In this embodiment, the second rotary drive device 72 can be a servo motor of an appropriate model.

[0046] In a preferred embodiment, the gear transmission assembly includes a driving gear 74 and a plurality of driven gears 75. The driving gear 74 is connected to the second rotary drive device 72. The plurality of driven gears 75 are respectively mounted on the support frame 71 via shaft rotation and distributed around the driving gear 74. The driving gear 74 meshes with the driven gears 75. The other ends of the plurality of telescopic universal drive shafts 73 are respectively connected to the shafts of the plurality of driven gears 75.

[0047] In the above implementation scheme, the distribution of the driving gears 74 is coaxial with the circumference of the multiple sets of shaft rotation drive members 3. When the second rotation drive device 72 drives the driving gears 74 to rotate, the multiple driven gears 75 rotate synchronously and in the same direction, which drives the multiple telescopic universal drive shafts 73 connected to the rotating shaft to rotate, thereby driving the rotating shafts of the multiple sets of shaft rotation drive members 3 to run synchronously and in the same direction. More specifically, one driving gear 74 meshes with multiple driven gears 75 to provide multiple power outputs. The power output end of each driven gear 75 transmits power through a telescopic universal drive shaft 73 (telescopic cross universal coupling) to drive the rotation of the shaft rotation drive member 3. The length of the telescopic universal drive shaft 73 automatically extends and retracts to adapt to the radial position changes of the automatic shaft rotation drive member 3.

[0048] In this embodiment, the support frame 71 includes a first mounting plate 711 and a second mounting plate 712 that are parallel to each other. The first mounting plate 711 and the second mounting plate 712 are arranged parallel to each other on the other side of the mounting disk 4. The edges of the first mounting plate 711 and the second mounting plate 712 are connected to a diagonal brace that is fixed to the mounting disk 4. The driving gear 74 and the driven gear 75 are respectively disposed between the first mounting plate 711 and the second mounting plate 712. The driven gear 75 is rotatably connected to the first mounting plate 711 and the second mounting plate 712 through a shaft. The second rotary drive device 72 is mounted on the first mounting plate 711 or the second mounting plate 712, and its driving end extends into the center between the first mounting plate 711 and the second mounting plate 712 and is connected to the driving gear 74 for transmission. The support frame 71 has a compact structure design, and the assembly of the driving gear 74 and the driven gear 75 is compact and stable.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A coaxial multi-bolt fastening system, characterized by: The utility model provides a kind of radial adjustable floating shelf, including frame (1), multiple groups of floating shelf assembly (2), multiple groups of shaft rotation driving part (3), rotation driving assembly and radial adjustment assembly, the frame (1) has a vertically arranged mounting disc (4), multiple groups of the floating shelf assembly (2) are assembled in the mounting disc (4) one side, and are distributed on the same circumference, the radial adjustment assembly is mounted on the mounting disc (4), and is connected with multiple groups of the floating shelf assembly (2), for synchronously driving multiple groups of the floating shelf assembly (2) along radial synchronous outward movement or inward movement, multiple groups of the shaft rotation driving part (3) are respectively one to one corresponding on multiple groups of the floating shelf assembly (2), and the same end of multiple groups of the shaft rotation driving part (3) is respectively connected with wind batch sleeve, and the rotation driving assembly is respectively connected with multiple groups of the shaft rotation driving part (3) transmission, for driving multiple groups of the shaft rotation driving part (3) corresponding wind batch sleeve synchronous same direction rotation.

2. A coaxial multi-bolt fastening system according to claim 1, wherein: The frame (1) includes two columns (11) and a bottom plate (12), the two columns (11) are respectively vertically and spaced apart fixed to the upper end of the bottom plate (12), the two sides of the mounting disc (4) are respectively connected and fixed with the upper end of the two columns (11), and the column (11) is a telescopic column.

3. A coaxial multi-bolt fastening system according to claim 2, wherein: It also includes a moving carrier (5), the moving carrier (5) is provided with a track parallel to the rotation center line of the shaft rotation driving part (3), the bottom plate (12) is mounted on the track and can slide along the track, and the bottom plate (12) is provided with a driving part for pushing it to move along the track on one side.

4. A coaxial multi-bolt fastening system according to claim 1, wherein: The floating shelf assembly (2) includes a fixed plate (21), a movable plate (22) and two guide rods (23), the fixed plate (21) is fixed to the outer edge of one side of the mounting disc (4), the movable plate (22) is arranged parallel to the fixed plate (21) on the side close to the center of the mounting disc (4), the two guide rods (23) are arranged in parallel and spaced apart, and one end of each of the two guide rods (23) is connected and fixed perpendicularly to the movable plate (22), the other end of each of the two guide rods (23) penetrates the fixed plate (21), and the other end of each of the two guide rods (23) is provided with a limiting plate, the fixed plate (21) and the movable plate (22) are connected with an elastic member (24), the middle part of the movable plate (22) is provided with a strip-shaped connecting rod (25) extending along the circumferential radial direction, the mounting disc (4) is provided with a strip-shaped hole (41) corresponding to the connecting rod (25), the shaft rotation driving part (3) is mounted on the connecting rod (25) and penetrates the strip-shaped hole (41), and the radial adjustment assembly is connected with the connecting rod (25) of multiple groups of the floating shelf assembly (2).

5. A coaxial multi-bolt fastening system according to claim 4, wherein: The radial adjusting assembly comprises a first rotary driving device (61) and a index positioning disc (62), the index positioning disc (62) is rotatably arranged at the center of one side of the mounting disc (4) and coaxially distributed with the plurality of shaft rotary driving members (3), the first rotary driving device (61) is arranged at the center of the other side of the mounting disc (4) and connected with the rotation center of the index positioning disc (62), a plurality of limiting pieces (621) corresponding to the plurality of connecting rods (25) are arranged at the outer edge of the index positioning disc (62) along the circumferential direction, the same side of the plurality of limiting pieces (621) along the circumferential direction is arranged as a flat section, the other side is arranged as an arc section, and a plurality of continuously distributed arc clamping grooves are arranged on the arc section, the end of the connecting rod (25) is in contact with the outer edge of the index positioning disc (62), the first rotary driving device (61) is used for driving the index positioning disc (62) to rotate, and the end of the connecting rod (25) is caused to slide along the edges of the plurality of limiting pieces (621) one by one in the process of rotation, so that the floating frame assembly (2) drives the shaft rotary driving member (3) to move radially.

6. A coaxial multi-bolt fastening system according to claim 4, wherein: The elastic member (24) is a spring and is sleeved on the guide rod (23).

7. A coaxial multi-bolt fastening system according to any one of claims 1 to 6, wherein: The shaft rotary driving member (3) comprises an electric wind batch structure.

8. A coaxial multi-bolt fastening system according to claim 7, wherein: The rotary driving assembly comprises a support frame (71), a second rotary driving device (72), a gear transmission assembly and a plurality of telescopic universal transmission shafts (73), the support frame (71) is arranged on the other side of the mounting disc (4), the second rotary driving device (72) is arranged on the support frame (71) and is in transmission connection with the gear transmission assembly, one end of each of the plurality of telescopic universal transmission shafts (73) is connected with the other end of each of the plurality of shaft rotary driving members (3) one by one, the other end of each of the plurality of telescopic universal transmission shafts (73) is connected with the gear transmission assembly, and the second rotary driving device (72) is used for driving the gear transmission assembly to operate, so that the plurality of shaft rotary driving members (3) are driven to operate through the plurality of telescopic universal transmission shafts (73), and synchronous and same-direction rotation of the plurality of wind batch sleeves is realized.

9. A coaxial multi-bolt fastening system according to claim 8, wherein: The gear transmission assembly comprises a driving gear (74) and a plurality of driven gears (75), the driving gear (74) is in transmission connection with the second rotary driving device (72), each of the plurality of driven gears (75) is rotatably arranged on the support frame (71) through a shaft and is distributed around the driving gear (74), the driving gear (74) is in meshing connection with the driven gears (75), and the other end of each of the plurality of telescopic universal transmission shafts (73) is connected with the shaft of each of the plurality of driven gears (75) one by one.

10. A coaxial multi-bolt fastening system according to claim 9, wherein: The support frame (71) comprises first and second installation plates (711, 712) parallel to each other, which are arranged on the other side of the installation disc (4), and a diagonal support rod connected to the installation disc (4) at the edges of the first and second installation plates (711, 712); the driving gear (74) and the driven gear (75) are arranged between the first and second installation plates (711, 712), the driven gear (75) is rotatably connected to the first and second installation plates (711, 712) through a shaft, and the second rotary driving device (72) is arranged on the first or second installation plate (711, 712), with the driving end extending into the center between the first and second installation plates (711, 712) and being in transmission connection with the driving gear (74).

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