Split type lock shaft connecting structure

Abstract

The utility model relates to a mechanical connection structure technology, and discloses a split type lock shaft connection structure which comprises a main split flange and an auxiliary split flange, the main split flange is formed by splicing two symmetrical main half flanges, the auxiliary split flange is formed by splicing two symmetrical auxiliary half flanges, and the main split flange and the auxiliary split flange are connected in a split mode. The joint of the two main half flanges is perpendicular to the joint of the two auxiliary half flanges. The structure has the beneficial effects that a multi-layer reinforcing structure can be formed after the structure is combined, and in the process that the main split expansion sleeve is used for jacking the main expansion part and the auxiliary split expansion sleeve is used for jacking the auxiliary expansion part, great external expansion torque can be borne, so that the holding force between the inner walls of the main expansion part and the auxiliary expansion part and the power main shaft is improved, and the fixing effect is improved; the contact tightness of the main split flange and the auxiliary split flange can be greatly improved, the external expansion force capable of being borne in the expansion process is further improved, and the safety of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical connection structures, and particularly relates to a split type shaft locking connection structure. Background Technique

[0002] Conventional ship power systems and power generation systems are divided into two forms, one is a separated type and the other is a combined type. Among them, the separated type structure means that the power system is separated from the power generation system, and the power generation system is set separately or installed separately in the power system; while the combined type structure installs the power generation module of the power generation system on the power output shaft of the power system to generate electricity during the rotation of the output shaft.

[0003] In the prior art, since the power system cannot stop during the temporary berthing and decelerating and variable pitch states of the ship, and the standby power of the power system is relatively large, there is a large amount of energy waste. Therefore, adding a generator to the output shaft of the existing ship to convert the decelerating standby kinetic energy of the power system into electric energy can save a large amount of power generation and fuel costs. However, since the main shaft part cannot be disassembled and installed and docked with power generation equipment after the ship's power system is installed, the installation of the power generation equipment is difficult. Especially for the connection part between the power generation equipment and the power main shaft, there is an urgent need for a split type assembled coupling to quickly install the generator on the drive shaft without changing or disassembling the ship's power system. By using a special split type assembled coupling, compared with the traditional bolt pressing method, the clamping force of the expansion sleeve increases several times, the volume is reduced, the installation is convenient, and the reliability is improved; while the conventional structure has a small transmitted torque, which is extremely easy to cause the connection structure to crack and is not easy to install, and the conventional structure is difficult to meet the actual needs. Content of the Utility Model

[0004] The purpose of the utility model is to provide a split type shaft locking connection structure to solve the above problems. Among the many technical solutions provided by the utility model, the preferred technical solution has the technical effects of small volume, convenient installation, high positioning accuracy, large torque, firm connection, high structural strength, etc., as described in detail below.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A split type shaft locking connection structure provided by the utility model includes a main split flange and a secondary split flange. The main split flange is spliced by two symmetrical main half flanges, and the secondary split flange is spliced by two symmetrical secondary half flanges. The main split flange and the secondary split flange are arranged, and the joints of the two main half flanges are perpendicular to the joints of the two secondary half flanges;

[0007] On the middle part of the side of the main split flange facing away from the sub-split flange, a main expansion part is provided. On the outside of the main expansion part, a main split expansion sleeve is provided. The contact surface between the main split expansion sleeve and the main expansion part is a conical surface. The main split expansion sleeve is connected to the main split flange through main expansion sleeve bolts. On the middle part of the side of the sub-split flange facing away from the main split flange, a sub-expansion part is provided. On the outside of the sub-expansion part, a sub-split expansion sleeve is provided. The contact surface between the sub-split expansion sleeve and the sub-expansion part is a conical surface. The sub-split expansion sleeve is connected to the sub-split flange through sub-expansion sleeve bolts;

[0008] On the outside of the main split expansion sleeve, a main expansion sleeve hub is provided. On the main expansion sleeve hub, a number of pin connectors are provided. The pin connectors penetrate through the main expansion sleeve hub and the main split flange and then are connected to the sub-split flange; On the outside of the sub-split expansion sleeve, a sub-expansion sleeve hub is provided. On the sub-expansion sleeve hub, a number of pin connectors are provided. The pin connectors penetrate through the sub-expansion sleeve hub and the sub-split flange and then are connected to the main split flange.

[0009] Preferably, the main expansion sleeve hub, the main split expansion sleeve, the sub-split expansion sleeve and the sub-expansion sleeve hub are all two-piece split structures that are symmetrical to each other, and the joints between the main expansion sleeve hub and the main split flange are perpendicular to each other, and the joints between the sub-expansion sleeve hub and the sub-split flange are perpendicular to each other; between the two symmetrical halves of the main expansion sleeve hub, the main split expansion sleeve, the sub-split expansion sleeve and the sub-expansion sleeve hub, they are all connected through two T-shaped mortise and tenon structures.

[0010] Preferably, a main connecting plate is provided at each of the two joints of the main split expansion sleeve. The main connecting plate is an arc-shaped plate, and both ends are respectively connected to the main split expansion sleeve through a number of main connecting bolts; a sub-connecting plate is provided at each of the two joints of the sub-split expansion sleeve. The sub-connecting plate is an arc-shaped plate, and both ends are respectively connected to the sub-split expansion sleeve through a number of sub-connecting bolts.

[0011] Preferably, a main bearing groove is provided on the main split flange. The main bearing groove is an annular groove, which is arranged on the outer circumference of the main expansion part, and the position of the main bearing groove corresponds to the position of the main split expansion sleeve; a sub-bearing groove is provided on the sub-split flange, and the position of the sub-bearing groove corresponds to the position of the sub-split expansion sleeve.

[0012] Preferably, threaded holes matching the stud connectors are formed on the main split flange and the secondary split flange respectively; the stud connector consists of a stud sleeve, a main bolt and a push bolt. A top cover is arranged at the top of the main bolt, and a main nut is arranged in the middle of the top of the top cover. The stud sleeve is arranged outside the main bolt and is integrally formed with the main bolt. The surface of the stud sleeve is a smooth cylindrical surface. The push bolt is arranged on the top cover and penetrates through the top cover; an upper gasket is arranged outside the main bolt. The upper gasket is located below the top cover and sleeved outside the stud sleeve.

[0013] Preferably, the stud sleeve consists of an inner tapered sleeve and an outer tapered sleeve. The inner tapered sleeve is sleeved outside the main bolt, and the outer tapered sleeve is sleeved outside the inner tapered sleeve. The diameter of the lower end of the inner tapered sleeve is smaller than that of the upper end; a draw washer is arranged at the bottom of the stud sleeve, and a draw hole is arranged in the middle of the draw washer. The diameter of the draw hole is smaller than the bottom diameter of the outer tapered sleeve and larger than the diameter of the main bolt.

[0014] Preferably, a circular positioning flange is arranged in the middle of the secondary split flange, and a positioning groove is arranged on the main split flange corresponding to the positioning flange.

[0015] Preferably, the main expansion part is integrally formed with the main split flange, and the secondary expansion part is integrally formed with the secondary split flange.

[0016] Preferably, the main expansion part and the main split flange are of a split structure, and the end faces of the two are butted; the secondary expansion part and the secondary split flange are of a split structure, and the end faces of the two are butted.

[0017] In summary, the beneficial effects of the present utility model are as follows: 1. By adopting the cooperation of the split main expansion sleeve hub, the main split flange, the secondary split flange and the secondary expansion sleeve hub, the contact gaps between adjacent structures are all cross-shaped, and combined with the T-shaped mortise and tenon structure at the connection position, a multi-layer reinforced structure can be formed after combination. During the process of using the main split expansion sleeve to tighten the main expansion part and using the secondary split expansion sleeve to tighten the secondary expansion part, it can withstand a great external expansion moment, thereby improving the clamping force between the inner walls of the main expansion part and the secondary expansion part and the power main shaft, and improving the fixing effect;

[0018] 2. By arranging a plurality of stud connectors between the main split flange and the secondary split flange, the tightness of the contact between the main split flange and the secondary split flange can be greatly improved, and further the external expansion force that can be withstood during the expansion process can be improved, and the safety of the structure can be improved. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0020] Figure 1 is the front view structural schematic diagram of the present invention;

[0021] Figure 2 is the rear view structural schematic diagram of the present invention;

[0022] Figure 3 is the three-dimensional structural schematic diagram of the present invention in an exploded state;

[0023] Figure 4 is the three-dimensional structural schematic diagram of the main split flange of the present invention;

[0024] Figure 5 is the three-dimensional structural schematic diagram of the auxiliary split flange of the present invention;

[0025] Figure 6 is the structural schematic diagram of the first embodiment of the pin connector of the present invention;

[0026] Figure 7 is the sectional structural schematic diagram of the second embodiment of the pin connector of the present invention.

[0027] The description of the reference numerals is as follows:

[0028] 1. Pin connector; 101. Pin sleeve; 101a. Outer cone sleeve; 101b. Inner cone sleeve; 102. Main bolt; 103. Thrust bolt; 104. Upper gasket; 2. Main expansion sleeve hub; 3. Main connecting bolt; 4. Main connecting plate; 5. Main split flange; 6. Auxiliary connecting plate; 7. Auxiliary expansion sleeve hub; 8. Auxiliary bearing groove; 9. Auxiliary split expansion sleeve; 10. Positioning flange; 11. Auxiliary split flange; 12. Main tightening part; 13. Main split expansion sleeve; 14. Main expansion sleeve bolt; 15. Main bearing groove; 16. Auxiliary tightening part. Detailed implementation manners

[0029] To make the purpose, technical solutions and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0030] SeeFigures 1 - 5 As shown in the figure, the present utility model provides a split shaft connection structure, which includes a main split flange 5 and a secondary split flange 11. The main split flange 5 is composed of two symmetric main half flanges spliced together, and the secondary split flange 11 is composed of two symmetric secondary half flanges spliced together. The main split flange 5 and the secondary split flange 11 are arranged such that the joints of the two main half flanges are perpendicular to the joints of the two secondary half flanges. In the middle of the side of the main split flange 5 facing away from the secondary split flange 11, a main expansion part 12 is provided. On the outside of the main expansion part 12, a main split expansion sleeve 13 is provided. The contact surface between the main split expansion sleeve 13 and the main expansion part 12 is a conical surface. The main split expansion sleeve 13 is connected to the main split flange 5 through main expansion sleeve bolts 14. In the middle of the side of the secondary split flange 11 facing away from the main split flange 5, a secondary expansion part 16 is provided. On the outside of the secondary expansion part 16, a secondary split expansion sleeve 9 is provided. The contact surface between the secondary split expansion sleeve 9 and the secondary expansion part 16 is a conical surface. The secondary split expansion sleeve 9 is connected to the secondary split flange 11 through secondary expansion sleeve bolts. On the outside of the main split expansion sleeve 13, a main expansion sleeve hub 2 is provided. On the main expansion sleeve hub 2, a number of pin connectors 1 are provided. The pin connectors 1 pass through the main expansion sleeve hub 2 and the main split flange 5 and then are connected to the secondary split flange 11. On the outside of the secondary split expansion sleeve 9, a secondary expansion sleeve hub 7 is provided. On the secondary expansion sleeve hub 7, a number of pin connectors 1 are provided. The pin connectors 1 pass through the secondary expansion sleeve hub 7 and the secondary split flange 11 and then are connected to the main split flange 5. With such a setting, the two lobes of the main split flange 5 can be first connected and positioned through the mortise and tenon structure at the connection, and the two lobes of the secondary split flange 11 can be connected and positioned through the mortise and tenon structure at the connection. Then, the main expansion sleeve hub 2 and the secondary expansion sleeve hub 7 are docked, and the pin connectors 1 are installed. Finally, the main split expansion sleeve 13 and the secondary split expansion sleeve 9 are installed, and through the cooperation of the main split expansion sleeve 13 and the main expansion part 12, combined with the cooperation of the secondary split expansion sleeve 9 and the secondary expansion part 16, the shaft connection structure is fixed on the outside of the output shaft of the ship.

[0031] The main expansion sleeve hub 2, the main split expansion sleeve 13, the secondary split expansion sleeve 9, and the secondary expansion sleeve hub 7 are all two-lobe split structures that are symmetric to each other. Moreover, the joint between the main expansion sleeve hub 2 and the main split flange 5 is perpendicular, and the joint between the secondary expansion sleeve hub 7 and the secondary split flange 11 is perpendicular. Between the two symmetric lobes of the main expansion sleeve hub 2, the main split expansion sleeve 13, the secondary split expansion sleeve 9, and the secondary expansion sleeve hub 7, they are all connected through two T-shaped mortise and tenon structures. The two-lobe structures are both semi-circular rings, that is, one T-shaped mortise and tenon structure is provided at each docking position at both ends of the semi-circular ring. While facilitating positioning, it can also serve as a reinforcement for the connection structure.

[0032] A main connecting plate 4 is respectively arranged at two joints of the main split expansion sleeve 13. The main connecting plate 4 is an arc-shaped plate, and both ends are respectively connected to the main split expansion sleeve 13 through a plurality of main connecting bolts 3. A secondary connecting plate 6 is respectively arranged at two joints of the secondary split expansion sleeve 9. The secondary connecting plate 6 is an arc-shaped plate, and both ends are respectively connected to the secondary split expansion sleeve 9 through a plurality of secondary connecting bolts. After such setting, the main connecting plate 4 can strengthen the structure at the joint of the main split expansion sleeve 13 and improve the position stability of the two during positioning. The secondary connecting plate 6 can strengthen the structure at the joint of the secondary split expansion sleeve 9 and improve the stability during positioning.

[0033] A main bearing groove 15 is arranged on the main split flange 5. The main bearing groove 15 is an annular groove, arranged on the outer circumference of the main tightening part 12, and the position of the main bearing groove 15 corresponds to the position of the main split expansion sleeve 13. A main bearing hole is formed inside the main bearing groove 15, and the main bearing hole is a threaded hole. When installing the main split expansion sleeve 13, the main expansion sleeve bolt 14 passes through the main split expansion sleeve 13 and then connects to the main bearing hole. During this process, the inclined surfaces of the main split expansion sleeve 13 and the main tightening part 12 cooperate with each other to be pressed tightly, so that the inner wall of the main tightening part 12 contracts inward to tightly hold the shaft. A secondary bearing groove 8 is arranged on the secondary split flange 11. The secondary split expansion sleeve 9 is connected to the secondary split flange 11 through a secondary expansion sleeve bolt. The position of the secondary bearing groove 8 corresponds to the position of the secondary split expansion sleeve 9. A secondary bearing hole matching the secondary expansion sleeve bolt is formed inside the secondary bearing groove 8, and its cooperation method is the same as the connection method and action method of the main expansion sleeve bolt 14 and the main bearing hole.

[0034] An annular positioning flange 10 is arranged in the middle of the secondary split flange 11. A positioning groove is arranged on the main split flange 5 corresponding to the positioning flange 10. The positioning flange 10 and the positioning groove are in snap-fit, which can facilitate the docking and positioning of the main split flange 5 and the secondary split flange 11 and improve the convenience of their positioning.

[0035] As one implementation manner of the main tightening part 12 and the main split flange 5, the main tightening part 12 and the main split flange 5 are integrally formed, and the secondary tightening part 16 and the secondary split flange 11 are integrally formed. In this structure, the main tightening part 12 and the main split flange 5 are of an integral structure, and the installation and positioning are more convenient. The structure of the secondary split flange 11 and the secondary tightening part 16 can also be set in this way.

[0036] As another embodiment of the main tightening part 12 and the main split flange 5, the main tightening part 12 and the main split flange 5 are of a split structure, and the end faces of the two are butt-jointed; the auxiliary tightening part 16 and the auxiliary split flange 11 are of a split structure, and the end faces of the two are butt-jointed; with such a setting, adopting a split structure, the main tightening part 12 and the main split flange 5 can be transported separately, making transportation more convenient; the structure of the auxiliary split flange 11 and the auxiliary tightening part 16 can also be set in this way.

[0037] See Figure 6 As shown, it is the first embodiment of the pin connector 1. Threaded holes matching the pin connector 1 are respectively formed on the main split flange 5 and the auxiliary split flange 11; the pin connector 1 is composed of a pin sleeve 101, a main bolt 102 and a push bolt 103. A top cover is arranged at the top of the main bolt 102, and a main nut is arranged in the middle of the top of the top cover. The pin sleeve 101 is arranged outside the main bolt 102 and is integrally formed with the main bolt 102. The surface of the pin sleeve 101 is a smooth cylindrical surface. The push bolt 103 is arranged on the top cover and penetrates through the top cover; an upper gasket 104 is arranged outside the main bolt 102. The upper gasket 104 is located below the top cover and is sleeved outside the pin sleeve 101; after such a setting, that is, the pin sleeve 101 is connected between the main split flange 5 and the auxiliary split flange 11. After such a setting, due to the very high structural strength of the pin sleeve 101 itself, that is, a strong shear-resistant structure can be formed between the main split flange 5 and the auxiliary split flange 11, thereby improving the overall connection stability and structural strength of the shaft locking connection structure.

[0038] See Figure 7 As shown, it is the second embodiment of the pin connector 1. The pin sleeve 101 is composed of an inner cone sleeve 101b and an outer cone sleeve 101a. The inner cone sleeve 101b is sleeved outside the main bolt 102, and the outer cone sleeve 101a is sleeved outside the inner cone sleeve 101b. The diameter of the lower end of the inner cone sleeve 101b is smaller than that of the upper end; a draw washer is arranged at the bottom of the pin sleeve 101, and a draw hole is arranged in the middle of the draw washer. The diameter of the draw hole is smaller than the bottom diameter of the outer cone sleeve 101a and larger than the diameter of the main bolt 102. The draw hole is a threaded hole, and the expanded outer cone sleeve 101a can be pulled out by connecting a draw bolt; after such a setting, when the main bolt 102 is screwed, that is, an opposite movement will be formed between the inner cone sleeve 101b and the outer cone sleeve 101a to form a shrink fit structure, thereby improving the tightness of the contact between the outer surface of the outer cone sleeve 101a and the main split flange 5 and the auxiliary split flange 11, and further improving the stability of the relative positions of the main split flange 5 and the auxiliary split flange 11 and the positioning accuracy of the structure.

[0039] By adopting the above structure, through the cooperation of the petal-type main expansion sleeve hub 2, the main split flange 5, the secondary split flange 11, and the secondary expansion sleeve hub 7, the contact gaps of adjacent structures are all cross-shaped, and the T-shaped mortise and tenon structure at the connection position can not only be used to position the petal-type structures when docking, thereby improving the installation efficiency, but also can form a multi-layer reinforced structure after the structure is combined. In the process of using the main split expansion sleeve 13 to tighten the main expansion part 12 and using the secondary split expansion sleeve 9 to tighten the secondary expansion part 16, it can withstand a large outward expansion torque, thereby increasing the clamping force between the inner wall of the main expansion part 12 and the secondary expansion part 16 and the power main shaft, and improving the fixing effect; by inserting a plurality of pin connectors 1 between the main split flange 5 and the secondary split flange 11, the tightness of the contact between the main split flange 5 and the secondary split flange 11 can be greatly improved, and the outward expansion force that can be borne during the expansion process can be further increased, thereby improving the safety of the structure.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A split-flap locking shaft connection structure, characterized in that: It comprises a main split flange (5) and a secondary split flange (11), wherein the main split flange (5) is formed by splicing two symmetrical main half flanges, and the secondary split flange (11) is formed by splicing two symmetrical secondary half flanges, and the main split flange (5) and the secondary split flange (11), and the seams of the two main half flanges and the seams of the two secondary half flanges are perpendicular to each other; A main expansion part (12) is provided in the middle of the side of the main split flange (5) facing away from the secondary split flange (11), a main split expansion sleeve (13) is provided outside the main expansion part (12), the contact surface between the main split expansion sleeve (13) and the main expansion part (12) is a conical surface, the main split expansion sleeve (13) is connected to the main split flange (5) via a main expansion sleeve bolt (14), a secondary expansion part (16) is provided in the middle of the side of the secondary split flange (11) facing away from the main split flange (5), a secondary split expansion sleeve (9) is provided outside the secondary expansion part (16), the contact surface between the secondary split expansion sleeve (9) and the secondary expansion part (16) is a conical surface, the secondary split expansion sleeve (9) is connected to the secondary split flange (11) via a secondary expansion sleeve bolt; A main expansion sleeve hub (2) is arranged on the outside of the main split expansion sleeve (13), and a plurality of pin connectors (1) are arranged on the main expansion sleeve hub (2). The pin connectors (1) penetrate the main expansion sleeve hub (2) and the main split flange (5) and are connected to the secondary split flange (11); a secondary expansion sleeve hub (7) is arranged on the outside of the secondary split expansion sleeve (9), and a plurality of pin connectors (1) are arranged on the secondary expansion sleeve hub (7). The pin connectors (1) penetrate the secondary expansion sleeve hub (7) and the secondary split flange (11) and are connected to the main split flange (5).

2. According to claim 1, a split-flap locking shaft connection structure is characterized in that: The main expansion sleeve hub (2), the main split expansion sleeve (13), the secondary split expansion sleeve (9) and the secondary expansion sleeve hub (7) are all symmetrical two-flange split structures, and the joints between the main expansion sleeve hub (2) and the main split flange (5) are perpendicular to each other, and the joints between the secondary expansion sleeve hub (7) and the secondary split flange (11) are perpendicular to each other; the symmetrical two flanks of the main expansion sleeve hub (2), the main split expansion sleeve (13), the secondary split expansion sleeve (9) and the secondary expansion sleeve hub (7) are connected by two T-shaped mortise and tenon structures.

3. According to claim 2, a split-petal locking shaft connection structure is characterized in that: A main connecting plate (4) is respectively provided at the two joints of the main split expansion sleeve (13), the main connecting plate (4) is an arc-shaped plate, and the two ends are respectively connected to the main split expansion sleeve (13) through a plurality of main connecting bolts (3); a secondary connecting plate (6) is respectively provided at the two joints of the secondary split expansion sleeve (9), the secondary connecting plate (6) is an arc-shaped plate, and the two ends are respectively connected to the secondary split expansion sleeve (9) through a plurality of secondary connecting bolts.

4. According to claim 2, a split-petal locking shaft connection structure is characterized in that: The main split flange (5) is provided with a main load-bearing groove (15), which is an annular groove and is arranged on the outer circumference of the main expansion portion (12), and the position of the main load-bearing groove (15) corresponds to the position of the main split expansion sleeve (13); the secondary split flange (11) is provided with a secondary load-bearing groove (8), and the position of the secondary load-bearing groove (8) corresponds to the position of the secondary split expansion sleeve (9).

5. According to claim 1, the split-petal locking shaft connection structure is characterized in that: The main split flange (5) and the auxiliary split flange (11) are respectively formed with threaded holes matching the pin connector (1); the pin connector (1) is composed of a pin sleeve (101), a main bolt (102) and a push bolt (103); a top cover is arranged on the top of the main bolt (102); a main nut is arranged in the middle of the top of the top cover; the pin sleeve (101) is arranged on the outside of the main bolt (102) and is integrally formed with the main bolt (102); the surface of the pin sleeve (101) is a smooth cylindrical surface; the push bolt (103) is arranged on the top cover and passes through the top cover; an upper gasket (104) is arranged on the outside of the main bolt (102); the upper gasket (104) is located below the top cover and is sleeved on the outside of the pin sleeve (101).

6. The split-petal locking shaft connection structure according to claim 5, characterized in that: The pin sleeve (101) is composed of an inner tapered sleeve (101b) and an outer tapered sleeve (101a), wherein the inner tapered sleeve (101b) is sleeved on the outside of the main bolt (102), and the outer tapered sleeve (101a) is sleeved on the outside of the inner tapered sleeve (101b), and the diameter of the lower end of the inner tapered sleeve (101b) is smaller than the diameter of the upper end; a withdrawal gasket is provided at the bottom of the pin sleeve (101), and a withdrawal hole is provided in the middle of the withdrawal gasket, and the diameter of the withdrawal hole is smaller than the bottom diameter of the outer tapered sleeve (101a) and larger than the diameter of the main bolt (102).

7. The split-petal locking shaft connection structure according to claim 1, characterized in that: An annular positioning flange (10) is provided in the middle of the auxiliary split flange (11), and a positioning groove is provided on the main split flange (5) corresponding to the positioning flange (10).

8. The split-petal locking shaft connection structure according to claim 1, characterized in that: The main expansion portion (12) is integrally formed with the main split flange (5), and the secondary expansion portion (16) is integrally formed with the secondary split flange (11).

9. The split-petal locking shaft connection structure according to claim 1, characterized in that: The main expansion part (12) and the main split flange (5) are split structures, and the end faces of the two are butted against each other; the secondary expansion part (16) and the secondary split flange (11) are split structures, and the end faces of the two are butted against each other.

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