Transmission shaft middle power output structure

Abstract

A power output structure in the middle of a transmission shaft comprises a power output flange and a locking ring, and the power output flange and the locking ring are sequentially arranged on the transmission shaft in a nested mode. A locking sleeve is arranged on the power output flange, and the matching surface of the locking sleeve and the locking ring is a conical surface; the locking ring is arranged outside the locking sleeve of the power output flange and is connected with the power output flange through the locking bolt; when the locking bolt is tightened, the locking ring moves towards the middle relative to the axis of the locking sleeve, the locking sleeve is locked on the outer circle face of the transmission shaft through the matched conical face, and power connection between the power output flange and the transmission shaft is achieved. The power output flange and the locking ring are both of a split type structure, the power output flange and the locking ring are split at the set position of the transmission shaft to form the complete power output flange and the complete locking ring during construction, and therefore dismounting is not needed in the construction process, and any connecting structure of an original transmission shaft is not affected. The device has the advantages of small construction work amount, short period, reliable transmission connection and large output torque.

Description

Technical Field

[0001] The utility model relates to the technical field of drive shaft output connection structures, and particularly to a power output structure in the middle of a drive shaft. Background Technique

[0002] After the drive 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 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 drive shaft to drive the new power generation equipment.

[0003] However, when adding new power generation equipment, to ensure the structural stability of the original ship drive shaft, any changes to the drive shaft structure are usually not allowed, such as machining keyway structures for torque transmission on the drive shaft; at the same time, 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 drive shaft; and there is currently no information revealing the connection structure and assembly method between the middle of the drive shaft that meets the above requirements and the newly added power generation equipment. Content of the Utility Model

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

[0005] To achieve the purpose of the utility model, the following technical scheme is adopted: A power output structure in the middle of a drive shaft includes a power output flange and a locking ring. The power output flange and the locking ring are nested on the drive shaft in sequence; the mating surface between the power output flange and the locking ring is a conical surface. When the locking ring moves along the axis of the drive shaft, by using the cooperation between the conical surfaces, the locking ring causes the locking sleeve to be locked onto the outer cylindrical surface of the drive shaft, and the drive shaft outputs power through the power output flange.

[0006] Furthermore, the power output flange includes a flange plate and a locking sleeve. The outer cylindrical surface of the locking sleeve is provided with an outer conical surface; the inner cylindrical surface of the locking ring is provided with an inner conical surface; the locking ring is arranged outside the locking sleeve of the power output flange and is connected to the power output flange through a locking bolt; when the locking bolt is tightened, the locking ring moves axially relative to the locking sleeve, and by using the conical surface cooperation, the locking sleeve is locked onto the outer cylindrical surface of the drive shaft, and the drive shaft outputs power through the power output flange.

[0007] Furthermore, the power output flange and the locking ring are both split structures; the number of split parts of the power output flange and the locking ring is more than 2; after adopting the split structure, the power connection between the power output flange and the transmission shaft can be completed without disassembling any connection structures of the original transmission shaft, which has the advantages of small construction workload, short construction period, reliable transmission connection, and large output torque.

[0008] Furthermore, the split parts of more than 2 locking rings are fixedly connected by connecting bolts to form an annular locking ring.

[0009] Furthermore, the locking sleeve is arranged on one side or both sides of the flange plate.

[0010] Furthermore, a locking ring flange is provided on the locking ring, and the locking ring flange is connected to the flange plate by a locking bolt; or two locking ring flanges are connected by a locking bolt to clamp the flange plate between the two locking ring flanges.

[0011] Furthermore, the flange plate and the locking sleeve are of an integral structure.

[0012] Preferably, the flange plate and the locking sleeve are of a split structure; they are fixedly connected between the flange plate and the locking sleeve.

[0013] Due to the adoption of the above-mentioned technical solution, the present utility model has the following beneficial effects: A power output structure in the middle of a transmission shaft disclosed by the present utility model includes a power output flange and a locking ring, and the power output flange and the locking ring are sequentially nested on the transmission shaft; a locking sleeve is provided on the power output flange, an outer conical surface is provided on the outer circumferential surface of the locking sleeve, and an inner conical surface is provided on the inner circumferential surface of the locking ring; the locking ring is arranged outside the locking sleeve of the power output flange and is connected to the power output flange by a locking bolt; when the locking bolt is tightened, the locking ring moves axially relative to the locking sleeve, and the locking sleeve is locked on the outer circumferential surface of the transmission shaft by the cooperation of the conical surfaces, realizing the power connection between the power output flange and the transmission shaft; both the power output flange and the locking ring adopt a split structure, and during construction, several split parts of the power output flange and the locking ring are spliced into a complete power output flange and locking ring at the set position of the transmission shaft. Therefore, during the construction process, there is no need to disassemble and affect any connection structures of the original transmission shaft, which has the advantages of small construction workload, short construction period, reliable transmission connection, and large output torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic external view of the power output structure in the middle of the transmission shaft after the assembly of Embodiment 1 is completed;

[0015] Figure 2 It is a schematic exploded view of the power output structure in the middle of the transmission shaft of Embodiment 1;

[0016] Figure 3 It is a schematic cross-sectional view of the power output structure in the middle of the transmission shaft of Embodiment 1;

[0017] Figure 4 Schematic diagram of the complete appearance of the power output flange in the first embodiment;

[0018] Figure 5 Schematic diagram of the split appearance of the power output flange in the first embodiment;

[0019] Figure 6 Schematic diagram of the complete appearance of the locking ring A in the first embodiment;

[0020] Figure 7 Schematic diagram of the split appearance of the locking ring A in the first embodiment;

[0021] Figure 8 Schematic diagram of the complete appearance of the locking ring B in the first embodiment;

[0022] Figure 9 Schematic diagram of the split appearance of the locking ring B in the first embodiment;

[0023] Figure 10 Schematic diagram of the appearance after the assembly of the power output structure in the middle of the transmission shaft in the second embodiment is completed;

[0024] Figure 11 Schematic diagram of the disassembly of the power output structure in the middle of the transmission shaft in the second embodiment;

[0025] Figure 12 Schematic diagram of the cross-section of the power output structure in the middle of the transmission shaft in the second embodiment;

[0026] Figure 13 Schematic diagram of the complete appearance of the power output flange in the second embodiment;

[0027] Figure 14 Schematic diagram of the split appearance of the power output flange in the second embodiment;

[0028] Figure 15 Schematic diagram of the cross-section of the power output structure in the middle of the transmission shaft in the third embodiment;

[0029] Figure 16 Schematic diagram of the cross-section of the power output structure in the middle of the transmission shaft in the fourth embodiment;

[0030] Figure 17 Schematic diagram of the axial direction of the power output structure in the middle of the transmission shaft in the fourth embodiment.

[0031] In the figure: 1. Power output flange; 1.1. Flange; 1.1.1. Flange through hole; 1.1.2. Flange threaded hole; 1.2. Locking sleeve; 1.2.1. Outer conical surface of locking sleeve; 2. Locking ring A; 2.1. Locking ring A petal; 2.1.1. Locking ring A flange; 2.1.1.1. Flange through hole; 2.1.2. Locking ring A body; 2.1.2.1. Locking ring A inner conical surface; 2.1.2.2. Locking ring A connecting hole; 3. Locking ring B; 3.1. Locking ring B petal; 3.1.1. Locking ring B flange; 3.1.1.1. Flange threaded hole; 3.1.2. Locking ring B body; 3.1.2.1. Locking ring B inner conical surface; 3.1.2.2. Locking ring A connecting hole; 4. Transmission shaft. DETAILED DESCRIPTION

[0032] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0033] A power output structure in the middle of a transmission shaft comprises a power output flange 1 and a locking ring, wherein the power output flange 1 and the locking ring are nested in sequence on a transmission shaft 4; the power output flange 1 comprises a flange plate 1.1 and a locking sleeve 1.2, wherein the outer circumferential surface of the locking sleeve 1.2 is provided with an outer conical surface; the inner circumferential surface of the locking ring is provided with an inner conical surface; the locking ring is arranged outside the locking sleeve 1.2 of the power output flange 1, and is connected to the power output flange 1 through locking bolts; when the locking bolts are tightened, the locking ring moves axially relative to the locking sleeve 1.2, and the inner diameter of the locking sleeve 1.2 changes by utilizing the interference fit of the conical surfaces between the matching surfaces, thereby locking the power output flange 1 on the outer circumferential surface of the transmission shaft 4, and the transmission shaft 4 outputs power to the outside through the power output flange 1; a plurality of connecting through holes are evenly distributed on the output flange 1, and the generator rotor is fixedly connected to the output flange 1 through the connecting through holes.

[0034] Furthermore, the power output flange 1 and the locking ring are both of a petal-type structure; under the premise that any equipment connected to the original transmission shaft 4 is not allowed to be disassembled, both ends of the transmission shaft 4 are closed, and the power output flange 1 and the locking ring cannot be installed when they are complete ring structures. After the power output flange 1 and the locking ring are set as a petal structure, they can be installed in the middle of the transmission shaft 4 in an assembled manner, thereby solving the connection and assembly problem of the power output flange 1, the locking ring and the transmission shaft 4 with both ends closed;

[0035] The number of split parts of the power output flange 1 and the locking ring is more than 2; usually, the power output flange 1 and the locking ring are divided into two parts. However, in some cases, such as when the volume and weight of the power output flange 1 and the locking ring are too large, and the on-site construction space is too small to use construction machinery for auxiliary construction, the power output flange 1 and the locking ring can be divided into three or more parts at this time to reduce the volume and weight of each part, thus facilitating construction.

[0036] Furthermore, the split parts of more than 2 locking rings are fixedly connected by connecting bolts to form an annular locking ring.

[0037] Furthermore, the locking sleeve 1.2 is arranged on one side or both sides of the flange 1.1; when the torque output by the power output flange 1 is not large, setting the locking sleeve 1.2 on one side of the flange 1.1 can meet the use design requirements, and this structural design can reduce the overall width of the power output flange 1; however, when the torque output requirement of the power output flange 1 is higher, by setting the locking sleeve 1.2 on both sides of the flange 1.1, a larger transmission torque can be provided to meet the larger load torque requirement of the power output flange 1.

[0038] Furthermore, a locking ring flange is provided on the locking ring, and the locking ring flange is connected to the flange 1.1 by a locking bolt; or the two locking ring flanges are connected by a locking bolt to clamp the flange 1.1 between the two locking ring flanges; the above connection structure of the locking ring flange provided on the locking ring can reduce the weight of the locking ring on the premise of meeting the torque output of the power output flange 1 to the outside, thereby reducing the moment of inertia of the power output structure in the middle of the transmission shaft, and the dynamic characteristics of the original power transmission overall structure will not be affected too much.

[0039] Furthermore, the flange 1.1 and the locking sleeve 1.2 are of an integral structure; when the flange 1.1 and the locking sleeve 1.2 are of an integral structure, their structural strength is the highest, but the weight of the original forging blank of the power output flange 1 is large and the machining allowance is large, which will result in a higher cost; under the condition of giving priority to ensuring the reliability requirements, this structure is preferably selected.

[0040] Preferably, the flange 1.1 and the locking sleeve 1.2 are of a split structure, and the flange 1.1 and the locking sleeve 1.2 are fixedly connected by interference fit or welding; when the flange 1.1 and the locking sleeve 1.2 are of a split structure, the weight of the original forging blanks of the flange 1.1 and the locking sleeve 1.2 is small and the machining allowance is small, so the cost is low; when there are requirements for the product cost under the premise of meeting the designed output torque of the power output flange 1, this structure can be preferably selected.

[0041] A method for assembling a power output structure in the middle of a transmission shaft, comprising: splicing a power output flange 1 and several petals of a locking ring at a set position of a transmission shaft 4; the several petals of the locking ring are connected by connecting bolts to form an annular structure; the annular structure locking ring is driven by the locking bolts to move axially along the transmission shaft 4, and the inner diameter of the locking sleeve 1.2 is changed by utilizing the interference fit of the conical surface, thereby locking the power output flange 1 on the outer cylindrical surface of the transmission shaft 4, and the transmission shaft 4 outputs power to the outside through the power output flange 1; a plurality of connecting through holes are evenly distributed on the output flange 1, and the generator rotor is fixedly connected to the output flange 1 through the connecting through holes; this connection method is suitable for the situation where the original connection structures at both ends of the transmission shaft 4 are not allowed to be removed. When this connection method is used, the power output flange 1 and the locking ring are both petal structures.

[0042] Preferably, another assembly method of the power output structure in the middle of the transmission shaft, the power output flange 1 and the locking ring are both started from one end of the transmission shaft 4 and are moved to the set position of the transmission shaft 4, the locking ring is driven by the locking bolt, and moves axially along the transmission shaft 4, and the inner diameter of the locking sleeve 1.2 is changed by utilizing the interference fit of the conical surface, so that the power output flange 1 is locked on the outer cylindrical surface of the transmission shaft 4, and the transmission shaft 4 outputs power to the outside through the power output flange 1; a plurality of connecting through holes are evenly distributed on the output flange 1, and the generator rotor is fixedly connected to the output flange 1 through the connecting through holes; this connection method is suitable for the situation where the original connection structure at one end of the transmission shaft 4 can be removed or a new ship is built. When this connection method is used, the power output flange 1 and the locking ring are usually an integral circular ring structure. Embodiment 1:

[0043] See the instruction manual Figure 1 , 2 , 3: respectively show the appearance, decomposition structure and cross-sectional structure of a power output structure in the middle of the transmission shaft; the power output structure in the middle of the transmission shaft includes a power output flange 1, a locking ring A2, and a locking ring B3, and the power output flange 1, the locking ring A2, and the locking ring B3 are all two-petal structures; see the attached manual Figure 4 , 5 The two halves of the power output flange 1 have the same structure, including a flange 1.1 and a locking sleeve 1.2. The locking sleeve 1.2 is arranged on both sides of the flange 1.1. The flange 1.1 and the locking sleeve 1.2 are an integral structure. The outer cylindrical surface of the locking sleeve 1.2 is provided with an outer conical surface 1.2.1 of the locking sleeve. The end surface of the flange 1.1 is evenly distributed with 16 flange through holes 1.1.1 (for passing connecting bolts) and 18 motor rotor connecting holes; see the attached manual Figure 6 , 7: The locking ring A2 is divided into two split locking rings A2.1. The structures of the two split locking rings A2.1 are basically the same, including a locking ring A flange 2.1.1 and a locking ring A body 2.1.2. The locking ring A flange 2.1.1 is arranged on one end face of the locking ring A body 2.1.2, and the two are of an integral structure. 16 flange through holes 2.1.1.1 are evenly distributed on the end face of the locking ring A flange 2.1.1. A locking ring A inner conical surface 2.1.2.1 is arranged on the inner circular surface of the locking ring A body 2.1.2. A connecting rib is machined on the outer circular surface of the locking ring A body 2.1.2 by flattening, and a locking ring A connecting hole 2.1.2.2 is arranged on the connecting rib. The difference in the structures of the two split locking rings A2.1 lies in that: the locking ring A connecting hole 2.1.2.2 of one of the split locking rings A2.1 is a through hole (light hole), and the locking ring A connecting hole 2.1.2.2 of the other split locking ring A2.1 is a threaded hole; or one of the locking ring A connecting holes 2.1.2.2 corresponding to the two split locking rings A2.1 is a through hole and the other is a threaded hole, and the through holes and threaded holes of the same split locking ring A2.1 are staggered. This way of staggering the through holes and threaded holes is to prevent the bolt head of the connecting bolt from interfering when located on the same side due to its relatively large diameter. The two split locking rings A2.1 are fixedly connected by connecting bolts to form a complete ring-shaped locking ring A2; see the attached Figure 8 , 9 : The structure of the locking ring B3 is basically the same as that of the locking ring A2. The locking ring B3 is divided into two split locking rings B3.1. The structures of the two split locking rings B3.1 are basically the same, including a locking ring B flange 3.1.1 and a locking ring B body 3.1.2. The locking ring B flange 3.1.1 is arranged on one end face of the locking ring B body 3.1.2, and the two are of an integral structure. 16 flange threaded holes 3.1.1.1 (different from the flange through holes 2.1.1.1) are evenly distributed on the end face of the locking ring B flange 3.1.1. A locking ring B inner conical surface 3.1.2.1 is arranged on the inner circular surface of the locking ring B body 3.1.2. A connecting rib is machined on the outer circular surface of the locking ring B body 3.1.2 by flattening, and a locking ring A connecting hole 3.1.2.2 is arranged on the connecting rib. The difference in the structures of the two split locking rings B3.1 lies in that: the locking ring B connecting hole 3.1.2.2 of one of the split locking rings B3.1 is a through hole (light hole), and the locking ring B connecting hole 3.1.2.2 of the other split locking ring B3.1 is a threaded hole; or one of the locking ring B connecting holes 3.1.2.2 corresponding to the two split locking rings B3.1 is a through hole and the other is a threaded hole, and the through holes and threaded holes of the same split locking ring B3.1 are staggered. The two split locking rings B3.1 are fixedly connected by connecting bolts to form a complete ring-shaped locking ring B3;

[0044] See the attached Figure 1: Two split power output flanges 1 are correspondingly arranged at the set positions on the transmission shaft 4; the locking ring A2 is arranged on the left side of the power output flange 1, and the splicing seam of the locking ring A2 is arranged in a dislocation manner with the splicing seam of the power output flange 1. The inner conical surface 2.1.2.1 of the locking ring A is arranged outside the outer conical surface 1.2.1 of the left locking sleeve; the locking ring B3 is arranged on the right side of the power output flange 1, and the splicing seam of the locking ring B3 is arranged in a dislocation manner with the splicing seam of the power output flange 1. The inner conical surface 3.1.2.1 of the locking ring B is arranged outside the outer conical surface 1.2.1 of the right locking sleeve; the locking bolts sequentially pass through the flange through holes 2.1.1.1 of the split parts 2.1 of the locking ring A and the flange through holes 1.1.1, and are meshed and connected with the flange threaded holes 3.1.1.1 of the split parts 3.1 of the locking ring B; when the locking bolts are tightened, the locking ring A2 and the locking ring B3 move axially towards the middle along the transmission shaft 4. By using the interference fit of the conical surfaces between the locking ring A2, the locking ring B3 and the power output flange 1, the inner diameter of the locking sleeve 1.2 becomes smaller and is locked on the outer cylindrical surface of the transmission shaft 4, thereby fixedly connecting the transmission shaft 4 and the power output flange 1 together, enabling the power output flange 1 to reliably output the load torque according to the design load requirements.

[0045] In this embodiment, if the power output flange 1, the locking ring A2, and the locking ring B3 are too heavy, they can also be divided into three or four parts.

[0046] Assembly method of the power output structure in the middle of the transmission shaft:

[0047] One: First, set the two split power output flanges 1 at the set positions on the outer cylindrical surface of the transmission shaft 4. By using the adjacent motor rotor connection holes on the two split flanges 1.1, temporarily connect the two split power output flanges 1 into a whole with bolts, nuts, and connecting plates; then fix the connected power output flange 1 at the set axial position on the transmission shaft 4 with a bracket (assembly tooling) and keep it stationary.

[0048] Two: Correspondingly arrange the two split parts 2.1 of the locking ring A on the outer conical surface 1.2.1 of the locking sleeve on the left side of the power output flange 1, and fixedly connect the two split parts 2.1 of the locking ring A with connecting bolts; correspondingly arrange the two split parts 3.1 of the locking ring B on the outer conical surface 1.2.1 of the locking sleeve on the right side of the power output flange 1, and fixedly connect the two split parts 3.1 of the locking ring B with connecting bolts; when setting the locking ring A2 and the locking ring B3, note that the splicing seams of the locking ring A2 and the locking ring B3 are both arranged in a dislocation manner with the splicing seam of the power output flange 1.

[0049] Three: Sequentially pass the locking bolts through the flange through holes 2.1.1.1 of the split parts 2.1 of the locking ring A and the flange through holes 1.1.1, and are meshed and connected with the flange threaded holes 3.1.1.1 of the split parts 3.1 of the locking ring B.

[0050] IV: Tighten all the locking bolts in sequence and in multiple rounds until the tightening torque of all the locking bolts finally reaches 2500 Nm; after the power output flange 1 is fixedly connected to the transmission shaft 4, the torque output by the power output flange 1 needs to reach the designed requirement of 4200 KNm.

[0051] V: Remove the bolts, nuts and connecting plates used for the temporary connection of the power output flange 1. Embodiment 2:

[0052] See the attached Figures 10 - 14 : In this embodiment, the locking sleeve 1.2 is only provided on one side of the flange 1.1, so the locking ring A2 is only provided on one side of the flange 1.1; in this embodiment, 16 flange threaded holes 1.1.2 are evenly distributed on the end face of the flange 1.1; during assembly, the locking bolts pass through the flange through holes 2.1.1.1 of the split 2.1 of the locking ring A and are meshed and connected with the flange threaded holes 1.1.2 of the flange 1.1. Embodiment 3:

[0053] See the attached Figure 15 : In this embodiment, the flange 1.1 and the locking sleeve 1.2 are of a split structure and are fixedly connected by welding. Embodiment 4:

[0054] See the attached Figure 16 、 17 : In this embodiment, the locking ring A flange 2.1.1 is not provided on the split 2.1 of the locking ring A, and the locking ring B flange 3.1.1 is not provided on the split 3.1 of the locking ring B; 16 through holes are evenly distributed on the end face of the locking ring A body 2.1.2, and 16 threaded holes are locally provided on the end face of the locking ring B body 3.1.2. The locking bolts pass through the 16 through holes of the locking ring A body 2.1.2 and are meshed and connected with the threaded holes of the locking ring B body 3.1.2.

[0055] Another assembly method for the power output structure in the middle of the transmission shaft: The locking ring A2, the power output flange 1 and the locking ring B3 all start from one end of the transmission shaft 4 and are movably arranged at the set positions on the transmission shaft 4. The locking ring A2 and the locking ring B3 are driven by the locking bolts and move axially in the middle along the transmission shaft 4. The power output flange 1 and the transmission shaft 4 are power-connected by using the conical surface fit; this connection method is applicable to the situation where the original connection structure at one end of the transmission shaft 4 can be removed or a new ship is built. When using this assembly method, the locking ring A2, the power output flange 1 and the locking ring B3 are usually of an integral ring structure, but for the split locking ring A2, power output flange 1 and locking ring B3, this connection method is also equally applicable.

[0056] It should be understood that the present solution is not limited to the above specific embodiments. The equipment, tooling, and structures not described in detail should be understood to be implemented in a common manner in the art. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present solution, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present solution. This does not affect the essence of the present solution. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present solution without departing from the content of the technical solution of the present solution still fall within the scope of protection of the technical solution of the present solution.

[0057] The parts not described in detail in the present utility model are prior art.

Claims

1. A power output structure in the middle of a drive shaft, comprising a power output flange (1) and a locking ring, the power output flange (1) and the locking ring are nested on the drive shaft (4) in sequence; characterized in that: The mating surface between the power output flange (1) and the locking ring is a conical surface. When the locking ring moves along the axis of the transmission shaft (4), by means of the mating between the conical surfaces, the locking ring causes the locking sleeve (1.2) to grip tightly on the outer cylindrical surface of the transmission shaft (4), and the transmission shaft (4) outputs power externally through the power output flange (1).

2. The power output structure in the middle of the transmission shaft according to claim 1 is characterized in that: The power output flange (1) includes a flange plate (1.1) and a locking sleeve (1.2). The outer cylindrical surface of the locking sleeve (1.2) is provided with an outer conical surface; the inner cylindrical surface of the locking ring is provided with an inner conical surface; the locking ring is arranged outside the locking sleeve (1.2) of the power output flange (1) and is connected to the power output flange (1) through locking bolts; when the locking bolts are tightened, the locking ring moves axially relative to the locking sleeve (1.2), and by means of the conical surface mating, the locking sleeve (1.2) is caused to grip tightly on the outer cylindrical surface of the transmission shaft (4), and the transmission shaft (4) outputs power externally through the power output flange (1).

3. The power output structure in the middle of the transmission shaft according to claim 2, wherein: The power output flange (1) and the locking ring are both split structures; the number of split parts of the power output flange (1) and the locking ring is more than 2.

4. The power output structure in the middle of the transmission shaft according to claim 3, wherein: More than 2 split parts of the locking ring are fixedly connected through connecting bolts to form an annular locking ring.

5. The power output structure in the middle of the transmission shaft according to claim 1 is characterized in that: The locking sleeve (1.2) is arranged on one side or both sides of the flange plate (1.1).

6. The power output structure in the middle of the transmission shaft according to claim 2, characterized in that: The locking ring is provided with a locking ring flange, and the locking ring flange is connected to the flange plate (1.1) through a locking bolt; or two locking ring flanges are connected through a locking bolt to clamp the flange plate (1.1) between the two locking ring flanges.

7. The power output structure in the middle of the transmission shaft according to claim 2, wherein: The flange plate (1.1) and the locking sleeve (1.2) are of an integral structure.

8. The power output structure in the middle of the transmission shaft according to claim 2, characterized in that: The flange plate (1.1) and the locking sleeve (1.2) are of a split structure; the flange plate (1.1) is fixedly connected to the locking sleeve (1.2).

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