Power output split type connecting structure in middle of transmission shaft

Abstract

A split type connecting structure for power output in the middle of a transmission shaft comprises a power output flange, two locking rings and an inner ring, matching surfaces of the power output flange, the locking rings and the inner ring are conical surfaces and are divided into two sections, and the two sections of the power output flange are fixedly connected through connecting bolts. When the power output flange is connected with the transmission shaft, the power output flange, the locking rings and the inner ring are sequentially spliced and arranged on the transmission shaft in a nested mode, and the two sets of locking rings are connected through locking bolts. When the locking bolts are tightened, the two sets of locking rings move towards the middle along the axis of the transmission shaft, the power output flange is tensioned by the outer circular surfaces of the locking rings and the transmission shaft is tightly held by the inner ring pressed by the inner circular surfaces of the locking rings through conical surface matching, so that the power output flange is fixedly connected with the transmission shaft; when the transmission shaft middle power output split type connecting structure is assembled, any connecting structure of an original transmission shaft does not need to be disassembled, and the transmission shaft middle power output split type connecting structure has the advantages of being small in construction work amount, short in period, reliable in transmission connection and large in output torque.

Description

Technical Field

[0001] The utility model relates to the technical field of power output connection structures of transmission shafts, and particularly relates to a split connection structure for power output in the middle of a transmission shaft. Background Art

[0002] After the transmission shaft for driving the propeller of a ship is manufactured and installed, no structural changes will be made to drive other equipment; however, in some special cases, for example, when a new high-power electrical equipment is added to the ship and the power of the original generator is no longer sufficient to meet the power demand of the newly added electrical equipment, it is necessary to add one or more power outputs in the middle of the original transmission shaft to drive the new power generation equipment.

[0003] However, when adding new power generation equipment, in order to ensure the structural stability of the original ship transmission shaft, any changes to the transmission shaft structure are usually not allowed, such as machining keyway structures for torque transmission on the transmission shaft; at the same time, in order to reduce the construction workload, shorten the construction period, and ensure the overall stability and reliability of the original transmission structure, it is usually not allowed to disassemble any equipment connected to the original transmission shaft; there is currently no information revealing the connection structure and assembly method between the middle part of the transmission shaft that meets the above requirements and the newly added power generation equipment. Summary of the Utility Model

[0004] In order to overcome the deficiencies in the background art, the utility model discloses a split connection structure for power output in the middle of a transmission shaft, which is used to solve the connection of newly added power generation equipment on the transmission shaft for driving the propeller of an existing ship, and while ensuring the overall stability and reliability of the original transmission shaft structure, ensure the connection reliability and sufficient output torque between the transmission shaft and the newly added power generation equipment.

[0005] In order to achieve the purpose of the utility model, the following technical scheme is adopted: a split connection structure for power output in the middle of a transmission shaft, which includes a power output flange, a locking ring, and an inner ring; the power output flange, the locking ring, and the inner ring are all divided into several segments; several segments of the power output flange are fixedly connected by bolts to form a complete ring structure, which is arranged in the middle of the transmission shaft; several segments of the locking ring and the inner ring are spliced into a ring structure and nested in the annular space between the power output flange of the complete ring structure and the transmission shaft; the mating surfaces between the power output flange, the locking ring, and the inner ring are all conical surfaces; when the locking ring moves axially along the transmission shaft, using the conical surface fit, the outer circle of the locking ring expands and tightens the power output flange, and the inner circle of the locking ring presses the inner ring to hold the transmission shaft tightly, so as to realize the fixed connection between the power output flange and the transmission shaft.

[0006] Furthermore, there are two sets of locking rings, and the two sets of locking rings are connected by locking bolts. When the locking bolts are tightened, the locking rings move axially along the transmission shaft. With the cooperation of the conical surfaces, the outer circle of the locking ring expands and tightens the power output flange, and the inner circle of the locking ring compresses the inner ring to hold the transmission shaft tightly, realizing the fixed connection between the power output flange and the transmission shaft.

[0007] Furthermore, the power output flange includes a flange body. There are a flange plate and a connecting plate on the outer circular surface of the flange body. Two power output flanges are fixedly connected by the connecting plate in a split manner. On both sides of the inner circular surface of the flange body, there are symmetrically arranged flange conical surfaces.

[0008] Furthermore, there is a retaining ring between the two flange conical surfaces.

[0009] Furthermore, the locking ring includes locking ring A and locking ring B. The outer circle of locking ring A is provided with an outer conical surface of locking ring A, the inner circle is provided with an inner conical surface of locking ring A, and there are several through bolt holes on the end face. The outer circle of locking ring B is provided with an outer conical surface of locking ring B, the inner circle is provided with an inner conical surface of locking ring B, and there are several threaded holes on the end face adjacent to locking ring A.

[0010] Furthermore, on both sides of the outer circle of the inner ring, there are symmetrically arranged inner ring conical surfaces.

[0011] Furthermore, there is a transition surface between the two inner ring conical surfaces.

[0012] Preferably, there is one set of locking rings. There is a transition surface on one side of the outer circular surface of the inner ring. There is a retaining ring on one side of the inner circle of the power output flange, and there are threaded holes on the retaining ring. The locking ring is connected to the retaining ring of the power output flange by a locking bolt. When the locking bolt is tightened, the locking ring moves axially along the transmission shaft. With the cooperation of the conical surfaces, the outer circle of the locking ring expands and tightens the power output flange, and the inner circle of the locking ring compresses the inner ring to hold the transmission shaft tightly, realizing the fixed connection between the power output flange and the transmission shaft.

[0013] Due to the adoption of the above-mentioned technical solutions, the present utility model has the following beneficial effects: A split connection structure for power output in the middle of a transmission shaft disclosed by the present utility model includes a power output flange, two sets of locking rings, and an inner ring. The mating surfaces of the power output flange, the locking rings, and the inner ring are all conical surfaces and are all divided into two parts. The two parts of the power output flange are fixedly connected by connecting bolts. When the power output flange is connected to the transmission shaft, the power output flange, the locking rings, and the inner ring are sequentially spliced and nested on the transmission shaft. The two sets of locking rings are connected by locking bolts. When the locking bolts are tightened, the two sets of locking rings move towards the middle along the axis of the transmission shaft. With the cooperation of the conical surfaces, the outer circle of the locking ring expands and tightens the power output flange, and the inner circle of the locking ring compresses the inner ring to hold the transmission shaft tightly, realizing the fixed connection between the power output flange and the transmission shaft. When assembling the split connection structure for power output in the middle of the transmission shaft, no connection structure of the original transmission shaft needs to be disassembled. It has the advantages of small construction workload, short cycle, reliable transmission connection, and large output torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. 0 is a schematic view of the appearance after the assembly of the split connection structure for power output in the middle of the transmission shaft;

[0015] Figure 2 FIG. 1 is an exploded schematic view of the split connection structure for power output in the middle of the transmission shaft in the first embodiment;

[0016] Figure 3 FIG. 2 is a schematic cross-sectional view of the split connection structure for power output in the middle of the transmission shaft in the first embodiment;

[0017] Figure 4 FIG. 3 is a schematic view of the appearance after the power output flange is spliced in the first embodiment;

[0018] Figure 5 FIG. 4 is a schematic view of the split appearance of the power output flange in the first embodiment;

[0019] Figure 6 FIG. 5 is a schematic view of the appearance after the locking ring A is spliced in the first embodiment;

[0020] Figure 7 FIG. 6 is a schematic view of the split appearance of the locking ring A in the first embodiment;

[0021] Figure 8 FIG. 7 is a schematic view of the appearance after the locking ring B is spliced in the first embodiment;

[0022] Figure 9 FIG. 8 is a schematic view of the split appearance of the locking ring B in the first embodiment;

[0023] Figure 10 FIG. 9 is a schematic view of the appearance after the inner ring is spliced in the first embodiment;

[0024] Figure 11 FIG. 10 is a schematic view of the split inner ring in the first embodiment;

[0025] Figure 12 FIG. 11 is a schematic cross-sectional view of the split connection structure for power output in the middle of the transmission shaft in the second embodiment.

[0026] In the figures: 1. Power output flange; 1.1 Flange body; 1.1.1 Flange conical surface; 1.1.2 Retaining ring; 1.2 Flange plate; 1.3 Connecting plate; 2. Locking ring A; 2.1 Outer conical surface of locking ring A; 2.2 Inner conical surface of locking ring A; 2.3 Bolt hole; 3. Locking ring B; 3.1 Outer conical surface of locking ring B; 3.2 Inner conical surface of locking ring B; 3.3 Threaded hole; 4. Inner ring; 4.1 Inner ring conical surface; 4.2 Transition surface; 5. Transmission shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model.

[0028] A split-type connection structure for power output in the middle of a drive shaft. Under the condition of not changing any existing structure of the existing drive shaft 5, a power is output through the power output flange 1 to drive the generator rotor. The split-type connection structure for power output in the middle of the drive shaft includes a power output flange 1, a locking ring, and an inner ring 4. The power output flange 1, the locking ring, and the inner ring 4 are nested on the drive shaft 5 in sequence. The mating surfaces of the power output flange 1, the locking ring, and the inner ring 4 are all conical surfaces. The power output flange 1, the locking ring, and the inner ring 4 are all divided into several segments, and several segments of the power output flange 1 are connected by bolts. There are two sets of locking rings, which are suitable for use when the power output flange 1 requires a relatively high output torque. The two sets of locking rings are connected by locking bolts. When the locking bolts are tightened, the locking rings move axially along the drive shaft 5. Using the interference fit of the conical surface, the outer circle of the locking ring tightens the power output flange 1, and the inner circle of the locking ring presses and holds the inner ring 4 to hold the drive shaft 5 tightly, realizing the fixed connection between the power output flange 1 and the drive shaft 5. During the assembly process of this split-type connection structure for power output in the middle of the drive shaft, there is no relative displacement between the inner ring 4 and the drive shaft 5, thereby preventing damage to the outer cylindrical surface of the drive shaft 5 during the assembly process, and ensuring the overall stability and reliability of the original transmission structure of the drive shaft 5.

[0029] Furthermore, the power output flange 1 includes a flange body 1.1. On the outer cylindrical surface of the flange body 1.1, there are a flange plate 1.2 and a connecting plate 1.3. There are connecting holes on the connecting plate 1.3. Two segments of the power output flange 1 are fixedly connected through the connecting plate 1.3. On both sides of the inner circle of the flange body 1.1, there are symmetrically arranged flange conical surfaces 1.1.1.

[0030] Furthermore, there is a retaining ring 1.1.2 between the two flange conical surfaces 1.1.1. The retaining ring 1.1.2 is used for the locking and positioning of the locking ring A2 and the locking ring B3. It should be supplemented that after setting the retaining ring 1.1.2, it is necessary to accurately calculate the interference amount of the conical surface fit between the locking ring A2, the locking ring B3 and the power output flange 1, the inner ring 4, and ensure the machining accuracy at the same time. Otherwise, there may be problems such as the locking ring A2 and the locking ring B3 cannot be locked in place, or the transmitted torque cannot meet the design requirements after being locked in place.

[0031] Furthermore, the locking ring includes a locking ring A2 and a locking ring B3. The outer circle of the locking ring A2 is provided with a locking ring A outer conical surface 2.1, the inner circle is provided with a locking ring A inner conical surface 2.2, and the end face is provided with several through bolt holes 2.3. The outer circle of the locking ring B3 is provided with a locking ring B outer conical surface 3.1, the inner circle is provided with a locking ring B inner conical surface 3.2, and the end face adjacent to the locking ring A2 is provided with several threaded holes 3.3.

[0032] Furthermore, inner ring cones 4.1 are symmetrically arranged on both sides of the outer circle of the inner ring 4; a transition surface 4.2 is arranged between the two inner ring cones 4.1.

[0033] Preferably, there is one set of locking rings; a transition surface 4.2 is arranged on one side of the outer circle surface of the inner ring 4; a retaining ring is arranged on one side of the inner circle of the power output flange 1, and a threaded hole is arranged on the retaining ring. The locking ring is connected to the retaining ring of the power output flange 1 through a locking bolt. The structure with one set of locking rings is applicable to the case where the torque output requirement of the power output flange 1 is relatively low, reducing the cost of the split connection structure for the power output in the middle of the transmission shaft.

[0034] An assembly method for the split connection structure of the power output in the middle of the transmission shaft, applicable to the assembly with two sets of locking rings, includes the following steps: First, arrange several segments of the inner ring 4 at the set position on the transmission shaft 5, and temporarily bundle and fix them with a flexible rope at the transition surface 4.2; Second, arrange several segments of the power output flange 1 outside the inner ring 4 and connect them into a whole through bolts; the spliced power output flange 1 is supported by a bracket and arranged at the set axial position on the transmission shaft 5; Third, arrange several segments of the locking ring B3 on one side of the annular space between the power output flange 1 and the inner ring 4, and initially fix the inner ring 4 by using the conical surface fit between the locking ring B3, the power output flange 1 and the inner ring 4; Fourth, remove the flexible rope that fixes the inner ring 4; arrange several segments of the locking ring A2 on the other side of the annular space between the power output flange 1 and the inner ring 4; Fifth, screw in the locking bolts from the side of the locking ring A2; calibrate the alignment of the inner ring 4 and the power output flange 1; Sixth, sequentially and multi-round lock all the connecting bolts until the tightening torque of all the connecting bolts reaches the set requirement, completing the fixed connection between the power output flange 1 and the transmission shaft 5.

[0035] An assembly method for the split connection structure of the power output in the middle of the transmission shaft, applicable to the assembly with one set of locking rings, includes the following steps: First, arrange several segments of the inner ring 4 at the set position on the transmission shaft 5, and temporarily bundle and fix them with a flexible rope at the inner ring cone surface 4.1; Second, arrange several segments of the power output flange 1 outside the inner ring 4 and connect them into a whole through bolts. The retaining ring of the power output flange 1 cooperates with the transition surface 4.2 on one side of the outer circle surface of the inner ring 4 to initially fix the inner ring 4, and then remove the flexible rope that fixes the inner ring 4; the spliced power output flange 1 is supported by a bracket and arranged at the set axial position on the transmission shaft 5; Third, arrange several segments of the locking ring A2 in the annular space between the power output flange 1 and the inner ring 4; Fourth, screw in the locking bolts from the side of the locking ring A2 and connect them to the retaining ring of the power output flange 1; Fifth, sequentially and multi-round lock all the connecting bolts until the tightening torque of all the connecting bolts reaches the set requirement, completing the fixed connection between the power output flange 1 and the transmission shaft 5.

[0036] Furthermore, the splicing seams of the power output flange 1, locking ring A 2, locking ring B 3, and inner ring 4 are all arranged in a staggered manner. Embodiment 1:

[0037] See the attached drawings of the specification Figure 1 and 2 : A split connection structure for power output in the middle of a drive shaft, including a power output flange 1, a locking ring, and an inner ring 4. The power output flange 1, two sets of locking rings, and the inner ring 4 are all divided into two segments;

[0038] See the attached drawings of the specification Figure 4 and 5 : The power output flange 1 includes a flange body 1.1. On the outer circular surface of the flange body 1.1, there are a flange plate 1.2 and a connecting plate 1.3; 36 through holes are evenly distributed on the flange plate 1.2 for fixed connection with the generator rotor; through holes and threaded holes are respectively provided on the connecting plates 1.3 of the two split power output flanges 1, and the two split power output flanges 1 are fixedly connected by connecting bolts; on both sides of the inner circular surface of the flange body 1.1, there are symmetrically arranged flange conical surfaces 1.1.1, and a retaining ring 1.1.2 is provided between the two flange conical surfaces 1.1.1;

[0039] The two sets of locking rings are respectively a locking ring A 2 and a locking ring B 3; See the attached drawings of the specification Figure 6 and 7 : The outer circular surface of the locking ring A 2 is provided with a locking ring A outer conical surface 2.1, the inner circular surface is provided with a locking ring A inner conical surface 2.2, and 16 through bolt holes 2.3 are provided on the end face; See the attached drawings of the specification Figure 8 and 9 : The outer circular surface of the locking ring B 3 is provided with a locking ring B outer conical surface 3.1, the inner circular surface is provided with a locking ring B inner conical surface 3.2, and 16 threaded holes 3.3 are provided on the end face adjacent to the locking ring A 2;

[0040] See the attached drawings of the specification Figure 10 and 11 : On both sides of the outer circular surface of the inner ring 4, there are symmetrically arranged inner ring conical surfaces 4.1; A transition surface 4.2 is provided between the two inner ring conical surfaces 4.1;

[0041] See the attached drawings of the specification Figure 2 and 3: The inner ring 4 is set at a set position on the outer cylindrical surface of the transmission shaft 5; the locking ring B3 and the locking ring A2 are respectively set on the left and right sides of the inner ring 4. The inner conical surface 3.2 of the locking ring B and the inner conical surface 2.2 of the locking ring A are respectively matched with the inner conical surfaces 4.1 on the left and right sides of the inner ring 4. The locking ring B3 and the locking ring A2 are connected by locking bolts; the power output flange 1 is set outside the locking ring B3 and the locking ring A2. The flange conical surfaces 1.1.1 on the left and right sides are respectively matched with the outer conical surface 3.1 of the locking ring B and the outer conical surface 2.1 of the locking ring A. The two power output flanges 1 are split and fixedly connected through the connecting plate 1.3 and bolts; when the locking bolts are tightened, the locking ring B3 and the locking ring A2 move towards the middle along the axis of the transmission shaft 5. By using the conical surface fit, the locking ring B3 and the locking ring A2 tighten the power output flange 1 and press the inner ring 4 to hold the transmission shaft 5 tightly, realizing the fixed connection between the power output flange 1 and the transmission shaft 5.

[0042] In this embodiment, the retaining ring 1.1.2 on the inner cylindrical surface of the power output flange 1 can also be cancelled.

[0043] In this embodiment, the power output flange 1, the two sets of locking rings, and the inner ring 4 can also be divided into three segments.

[0044] The assembly method of the split connection structure for power output in the middle part of the transmission shaft in this embodiment includes the following steps:

[0045] Set the two segments of the inner ring 4 at the set position of the transmission shaft 5, and temporarily bundle and fix them with a flexible rope at the transition surface 4.2;

[0046] Set the two segments of the power output flange 1 outside the inner ring 4 and connect them into a whole through bolts; the spliced power output flange 1 is supported by a bracket (assembly tooling) and set at the set axial position of the transmission shaft 5;

[0047] Set the two segments of the locking ring B3 on the left side of the annular space between the power output flange 1 and the inner ring 4, and initially fix the inner ring 4 by using the conical surface fit between the locking ring B3 and the power output flange 1 and the inner ring 4;

[0048] Remove the flexible rope that fixes the inner ring 4; set the two segments of the locking ring A2 on the right side of the annular space between the power output flange 1 and the inner ring 4;

[0049] Screw in the locking bolts from the side of the locking ring A2; calibrate the alignment of the inner ring 4 and the power output flange 1;

[0050] Sequentially and multi-round lock all the connecting bolts until the tightening torque of all the locking bolts reaches 2500 Nm; after the fixed connection between the power output flange 1 and the transmission shaft 4 is completed, the output torque of the power output flange 1 needs to reach 4200 KNm as required by the design. Embodiment 2:

[0051] See the attached instructions Figure 12 : In this embodiment, only one set of locking ring A2 is provided; correspondingly, on the inner circular surface of the flange body 1.1 of the power output flange 1, a flange conical surface 1.1.1 is only provided on the right side, a retaining ring 1.1.2 is arranged at the left end of the flange conical surface 1.1.1, and 16 threaded holes are evenly distributed on the retaining ring 1.1.2; correspondingly, on the outer circle of the inner ring 4, an inner ring conical surface 4.1 is only provided on the right side, and a transition surface 4.2 is provided at the left end of the inner ring conical surface 4.1.

[0052] The assembly method of the split connection structure for power output in the middle of the transmission shaft in this embodiment includes the following steps:

[0053] One: Arrange the two split inner rings 4 at the set position on the transmission shaft 5, and temporarily bundle and fix them with a flexible rope at the inner ring conical surface 4.1;

[0054] Two: Arrange the two split power output flanges 1 outside the inner ring 4, connect them into a whole through bolts, the retaining ring at the left end of the power output flange 1 is matched with the transition surface 4.2 at the left end of the outer circular surface of the inner ring 4 to initially fix the inner ring 4, and then remove the flexible rope that fixes the inner ring 4; the spliced power output flange 1 is supported by a bracket and arranged at the set axial position on the transmission shaft 5;

[0055] Three: Arrange the two split locking rings A2 in the annular space between the power output flange 1 and the inner ring 4;

[0056] Four: Screw in the locking bolts from the side of the locking ring A2 and connect them to the retaining ring of the power output flange 1;

[0057] Five: Sequentially and multi-round lock all the connecting bolts until the tightening torque of all the connecting bolts reaches the set requirements, and finally complete the fixed connection between the power output flange 1 and the transmission shaft 5.

[0058] During the assembly process of the split connection structure for power output in the middle of the transmission shaft, the splicing seams of the power output flange 1, the locking ring A2, the locking ring B3, and the inner ring 4 are all arranged in a staggered manner.

[0059] It should be understood that the present solution is not limited to the above specific implementation manners. The equipment, tooling, and structures not described in detail should be understood to be implemented in a common manner in this field; any person skilled in the art, without departing from the scope of the technical solution of this solution, can make many possible changes and modifications to the technical solution of this solution by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of this solution; therefore, all content that does not depart from the technical solution of this solution, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of this solution still belong to the scope of protection of the technical solution of this solution.

[0060] The parts not detailed in the present utility model are prior art.

Claims

1. A split connection structure for power output in the middle of a drive shaft, comprising a power output flange (1), a locking ring, and an inner ring (4); characterized in that: The power output flange (1), the locking ring, and the inner ring (4) are each divided into several segments; several segments of the power output flange (1) are fixedly connected by bolts to form a complete ring structure, which is arranged in the middle of the transmission shaft (5); several segments of the locking ring and the inner ring (4) are spliced into a ring structure and nested in the annular space between the power output flange (1) of the complete ring structure and the transmission shaft (5); the mating surfaces between the power output flange (1), the locking ring, and the inner ring (4) are all conical surfaces; when the locking ring moves axially along the transmission shaft (5), using the conical surface fit, the outer circle of the locking ring tightens the power output flange (1), and the inner circle of the locking ring presses the inner ring (4) to hold the transmission shaft (5) tightly, realizing the fixed connection between the power output flange (1) and the transmission shaft (5).

2. The split connection structure for power output in the middle of the transmission shaft according to claim 1, characterized in that: There are two sets of locking rings, and the two sets of locking rings are connected by locking bolts; when the locking bolts are tightened, the locking rings move axially along the transmission shaft (5), using the conical surface fit, the outer circle of the locking ring tightens the power output flange (1), and the inner circle of the locking ring presses the inner ring (4) to hold the transmission shaft (5) tightly, realizing the fixed connection between the power output flange (1) and the transmission shaft (5).

3. The split connection structure for power output in the middle of the transmission shaft according to claim 2, characterized in that: The power output flange (1) includes a flange body (1.1), and a flange plate (1.2) and a connecting plate (1.3) are provided on the outer circumferential surface of the flange body (1.1); two power output flanges (1) are fixedly connected by the connecting plate (1.3) in segments; flange conical surfaces (1.1.1) are symmetrically provided on both sides of the inner circumferential surface of the flange body (1.1).

4. The split connection structure for power output in the middle of the transmission shaft according to claim 3, characterized in that: A retaining ring (1.1.2) is provided between the two flange conical surfaces (1.1.1).

5. The split connection structure for power output in the middle of the transmission shaft according to claim 2, characterized in that: The locking ring includes a locking ring A (2) and a locking ring B (3); the outer circle of the locking ring A (2) is provided with a locking ring A outer conical surface (2.1), the inner circle is provided with a locking ring A inner conical surface (2.2), and several through bolt holes (2.3) are provided on the end face; the outer circle of the locking ring B (3) is provided with a locking ring B outer conical surface (3.1), the inner circle is provided with a locking ring B inner conical surface (3.2), and several threaded holes (3.3) are provided on the end face adjacent to the locking ring A (2).

6. The split connection structure for power output at the middle part of the transmission shaft according to claim 2, characterized in that: Inner ring conical surfaces (4.1) are symmetrically provided on both sides of the outer circle of the inner ring (4).

7. The split connection structure for power output in the middle of the transmission shaft according to claim 6, wherein: A transition surface (4.2) is provided between the two inner ring conical surfaces (4.1).

8. The split connection structure for power output at the middle of the transmission shaft according to claim 1, characterized in that: There is one set of locking rings; a transition surface (4.2) is provided on one side of the outer circumferential surface of the inner ring (4); a retaining ring is provided on one side of the inner circle of the power output flange (1), and threaded holes are provided on the retaining ring. The locking ring is connected to the retaining ring of the power output flange (1) by a locking bolt; when the locking bolt is tightened, the locking ring moves axially along the transmission shaft (5), using the conical surface fit, the outer circle of the locking ring tightens the power output flange (1), and the inner circle of the locking ring presses the inner ring (4) to hold the transmission shaft (5) tightly, realizing the fixed connection between the power output flange (1) and the transmission shaft (5).

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