Light-weight transmission shaft middle power output connecting structure and assembling method

Abstract

The light-weight transmission shaft middle power output connecting structure comprises a power output ring and a locking ring, the power output ring is provided with an outer taper sleeve, and the locking ring is provided with an inner taper hole; the power output ring and the locking ring are fixedly connected through an axial connecting bolt, and the power output ring is fixedly connected with the transmission shaft by matching an outer taper sleeve of the power output ring with the conical surface of an inner taper hole of the locking ring; the middle power output connecting structure of the light-weight transmission shaft has the advantages of being small in part number, light in overall weight and low in cost, so that the assembling difficulty is greatly reduced during field operation, and meanwhile the economic benefits of enterprises are improved.

Description

Technical Field

[0001] The invention relates to the technical field of power output structures of shaft parts, and in particular to a lightweight transmission shaft middle power output connection structure and an assembly method. Background Art

[0002] The existing ship structure design of adding one or more power outputs to the original propeller drive shaft is to set a tension sleeve assembly between the circular hole of the power output structure and the drive shaft, and realize the fixed connection between the power output structure and the drive shaft through the tapered surface matching between the tension sleeve assemblies. The existing structural design has the following problems: the annular body of the power output structure has to bear a huge tension force, so the wall thickness is relatively thick, resulting in a large weight of the power output structure; in addition, the tension sleeve assembly includes an inner ring, an outer ring and a middle ring, so there are also problems of a large number of parts and a large weight.

[0003] Due to the heavy weight of the power output structural parts added to the original propeller drive shaft, coupled with the limited on-site working space, on-site assembly is extremely difficult; in addition, the heavy weight of the power output structural parts and the large number of parts also lead to high overall material and processing costs, which also affects the company's economic benefits. Summary of the invention

[0004] In order to overcome the deficiencies in the background technology, the present invention discloses a lightweight transmission shaft mid-power output connection structure and assembly method, which achieves the technical effect of reducing the number of power output structural parts, overall weight, cost and difficulty of on-site assembly by optimizing the structural design.

[0005] In order to achieve the stated purpose of the invention, the present invention adopts the following technical scheme: a lightweight transmission shaft middle power output connection structure, including a power output ring and a locking ring; the power output ring is provided with an outer tapered sleeve, and the locking ring is provided with an inner tapered hole; the power output ring is arranged on the outer cylindrical surface of the transmission shaft, and the locking ring is arranged on the outer side of the outer tapered sleeve, the power output ring and the locking ring are fixedly connected by axial connecting bolts, and the power output ring is fixedly connected to the transmission shaft by the outer tapered sleeve and the tapered surface of the inner tapered hole; two groups of connecting holes are correspondingly arranged between the power output ring and the locking ring around the axis; power output connecting holes are evenly distributed around the axis.

[0006] Furthermore, the power output ring and the locking ring are of a petal structure; the number of petals of the power output ring and the locking ring is more than 2.

[0007] Furthermore, buckle joints and buckle grooves are provided correspondingly between adjacent locking ring petal joint surfaces.

[0008] Furthermore, semicircular splicing holes A and B are provided between adjacent locking ring petal splicing surfaces; the splicing holes A and B are both precision-reamed circular holes, conical holes or threaded holes.

[0009] Preferably, locking ring connecting holes are provided between adjacent locking ring petal joint surfaces.

[0010] Furthermore, an outer cone sleeve is provided on one or both sides of the power output ring.

[0011] Furthermore, alignment holes are provided on the splicing surfaces of the power output ring petals.

[0012] Furthermore, an assembly positioning hole and a disassembly ejection hole are correspondingly provided between the power output ring and the locking ring along the axial direction.

[0013] A method for assembling a lightweight transmission shaft middle power output connection structure, the specific assembly steps are as follows: S21, splicing the power output ring: setting one petal of the power output ring at the lower part of the transmission shaft, inserting a positioning pin into the alignment hole of the output ring, setting the other petal of the power output ring at the upper part of the transmission shaft, and ensuring that the splicing surfaces of the two petals of the power output ring are aligned by the positioning pin; S22, splicing the locking ring: setting one locking ring at the rear side of the transmission shaft, and setting the other locking ring at the front side of the transmission shaft, with the splicing surfaces of the two locking rings facing each other, and fixing the two locking rings together with bolts; after the locking rings are spliced, push the locking rings to move axially along the transmission shaft, so that the inner tapered hole contacts the conical surface of the outer tapered sleeve; S23, positioning of the power output ring and the locking ring connection hole: inserting positioning pins into the locking ring assembly positioning hole and the output ring assembly positioning hole to complete the positioning of the power output ring and the locking ring connection hole; S24. Locking and fixing of the power output ring and the locking ring: insert the connecting bolts; tighten the connecting bolts one by one in a clockwise or counterclockwise direction in an axially symmetrical manner in multiple rounds, drive the locking ring to move along the axis of the transmission shaft toward the power output ring, and make the inner hole of the outer tapered sleeve hug the transmission shaft by utilizing the cooperation between the inner tapered hole and the tapered surface of the outer tapered sleeve, so as to achieve a fixed connection between the power output ring and the transmission shaft.

[0014] A method for assembling a lightweight transmission shaft middle power output connection structure, the specific assembly steps are as follows: S31, splicing the power output ring: setting one petal of the power output ring at the lower part of the transmission shaft, inserting a positioning pin into the alignment hole of the output ring, setting the other petal of the power output ring at the upper part of the transmission shaft, and ensuring that the splicing surfaces of the two petals of the power output ring are aligned by the positioning pin; S32, splicing locking rings: set one locking ring at the rear side of the transmission shaft, and set the other locking ring at the front side of the transmission shaft, with the splicing surfaces of the two locking rings facing each other, connected by buckle joints and buckle grooves, and fixed by driving cylindrical pins, conical pins or screwing in bolts in the splicing holes A and B, so that the two locking rings are spliced ​​into an integral structure; after the splicing of the locking rings is completed, push the locking rings to move axially along the transmission shaft, so that the inner tapered hole contacts the tapered surface of the outer tapered sleeve; S33, positioning of the power output ring and the locking ring connection hole: inserting positioning pins into the locking ring assembly positioning hole and the output ring assembly positioning hole to complete the positioning of the power output ring and the locking ring connection hole; S34. Locking and fixing of the power output ring and the locking ring: insert the connecting bolts; tighten the connecting bolts one by one in a clockwise or counterclockwise direction in an axially symmetrical manner in multiple rounds, drive the locking ring to move along the axis of the transmission shaft toward the power output ring, and make the inner hole of the outer tapered sleeve hug the transmission shaft by utilizing the cooperation between the inner tapered hole and the tapered surface of the outer tapered sleeve, so as to achieve a fixed connection between the power output ring and the transmission shaft.

[0015] Due to the adoption of the technical scheme as described above, the present invention has the following beneficial effects: a lightweight transmission shaft middle power output connection structure and assembly method disclosed in the present invention include a power output ring and a locking ring, the power output ring is provided with an outer tapered sleeve, and the locking ring is provided with an inner tapered hole; the power output ring and the locking ring are fixedly connected by axial connecting bolts, and the power output ring and the transmission shaft are fixedly connected by utilizing the tapered surface cooperation between the outer tapered sleeve and the inner tapered hole; the lightweight transmission shaft middle power output connection structure has the advantages of a small number of parts, light overall weight and low cost, thereby greatly reducing the difficulty of on-site assembly and improving the economy of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the appearance of the middle power output connection structure of the lightweight transmission shaft in Example 1; Figure 2 This is a schematic diagram of the exploded structure of the power output connection in the middle of the lightweight transmission shaft of Example 1; Figure 3 This is a cross-sectional schematic diagram of the power output connection structure in the middle of the lightweight transmission shaft according to the first embodiment; Figure 4 This is a schematic diagram of the appearance of a power output ring of Embodiment 1; Figure 5 This is a schematic diagram of the appearance of a locking ring in Example 1; Figure 6 This is a schematic diagram of the appearance of the middle power output connection structure of the lightweight transmission shaft of Example 2; Figure 7 This is a schematic diagram of the exploded structure of the power output connection in the middle of the lightweight transmission shaft of the second embodiment; Figure 8This is a schematic diagram of the appearance of the power output ring petals of the second embodiment; Fig. 9 This is a schematic diagram of the appearance of the locking ring split petals of the second embodiment; Fig.10 This is a schematic diagram of the appearance of the middle power output connection structure of the lightweight transmission shaft of Example 3; Fig.11 This is a schematic diagram of the exploded structure of the power output connection in the middle of the lightweight transmission shaft of Example 3; Fig.12 This is a schematic diagram of the appearance of the locking ring petals of Example 3; Fig.13 This is a schematic diagram of the state where the wire cutting seam error has not been eliminated in the third embodiment; Fig.14 It is an enlarged schematic diagram of a part A of the embodiment 3 where the wire cutting seam error is not eliminated; Fig.15 This is a schematic diagram of the wire cutting seam error elimination state of the third embodiment; Fig.16 It is an enlarged schematic diagram of a part B of the wire cutting seam error elimination state of the third embodiment; Fig.17 This is a cross-sectional schematic diagram of the power output connection structure in the middle of the lightweight transmission shaft of the fourth embodiment; Fig.18 It is a schematic cross-sectional view of the power output connection structure in the middle of the lightweight transmission shaft of Example 5.

[0017] In the figure: 1. power output ring; 1.1. power output ring body; 1.1.1. output ring axial connecting hole; 1.1.2. power output connecting hole; 1.1.3. output ring ejection hole; 1.1.4. output ring assembly positioning hole; 1.2. outer cone sleeve; 1.3. output ring alignment hole; 1.4. output ring assembly lifting hole; 2. locking ring; 2.1. inner cone hole; 2.2. locking ring axial connecting hole; 2.3. locking ring assembly lifting hole; 2.4. locking ring ejection hole; 2.5. locking ring connecting hole; 2.6. locking ring assembly positioning hole; 2.7. buckle joint; 2.8. buckle groove; 2.9. splicing hole A; 2.10. splicing hole B; 3. transmission shaft. DETAILED DESCRIPTION

[0018] The present invention can be explained in detail by the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0019] Example 1, see the attached specification Figure 1-5 : See the instruction manual Figure 1-3 : A lightweight transmission shaft middle power output connection structure, including a power output ring 1 and a locking ring 2; see the attached manual Figure 4:The power output ring 1 is a complete annular structure with a through hole in the middle, including a power output ring body 1.1 and an outer cone sleeve 1.2. The power output ring body 1.1 and the outer cone sleeve 1.2 are an integral structure; the outer cone sleeve 1.2 is arranged on both end surfaces of the power output ring body 1.1, and its outer cylindrical surface is a conical surface; this structural design of the power output ring 1 actually cancels the thicker wall of the annular body of the power output structural part, and merges the inner ring of the tension sleeve assembly of the power output connection in the middle of the existing transmission shaft onto the power output structural part, thereby greatly reducing the weight of the power output ring 1; the end surface of the power output ring 1 is provided with two groups of output ring axial connecting holes 1.1.1 around its axis, and the two groups of output ring axial connecting holes 1.1.1 are divided The degree circles are concentrically arranged; in this embodiment, the output ring axial connecting hole 1.1.1 located on the inner ring pitch circle is a through hole, and the output ring axial connecting hole 1.1.1 located on the outer ring pitch circle is a threaded hole, wherein a plurality of output ring assembly positioning holes 1.1.4 are also arranged at intervals on the outer ring pitch circle; the power output ring 1 is also evenly provided with power output connecting holes 1.1.2 around its axis near the outer circumferential end surface, and the power output connecting holes 1.1.2 are used for fixed connection with the generator rotor; output ring ejection holes 1.1.3 are also arranged at intervals on the pitch circle where the power output connecting holes 1.1.2 are located, and the holes are threaded holes, which are used for disassembling the generator rotor. When disassembling the motor rotor, the generator rotor is pushed down by screwing in bolts; see the attached manual Figure 5 :The locking ring 2 is a complete annular structure with an inner tapered hole 2.1 in the middle. The structural design of the locking ring 2 actually replaces the outer ring and the middle ring of the tension sleeve assembly of the existing power output connection in the middle of the transmission shaft with a thicker walled annular body of the original power output structural member (the original outer ring and the middle ring are actually cancelled), thereby reducing the number of parts of the lightweight power output connection structure in the middle of the transmission shaft and reducing the overall weight; the end face of the locking ring 2 is provided with two groups of locking ring axial connection holes 2.2 around its axis, and the two groups of locking ring axial connection holes 2.2 correspond to the positions of the two groups of output ring axial connection holes 1.1.1, wherein A plurality of locking ring ejection holes 2.4 are arranged at intervals on the inner ring pitch circle, and the locking ring ejection holes 2.4 are threaded holes for disassembling the locking ring 2; a plurality of locking ring assembly positioning holes 2.6 are arranged at intervals on the outer ring pitch circle; two locking rings 2 are provided, and the locking ring axial connection holes 2.2 of one locking ring 2 are all through holes, and the locking ring axial connection holes 2.2 of the other locking ring 2 located on the inner ring pitch circle are threaded holes, and the locking ring axial connection holes 2.2 located on the outer ring pitch circle are through holes; a plurality of locking ring assembly lifting holes 2.3 are arranged on the outer circumferential surface of the locking ring 2, which are convenient for lifting during assembly; When assembling the power output connection structure in the middle of the lightweight transmission shaft, the power output ring 1 is arranged on the outer cylindrical surface of the transmission shaft 3, and the locking ring 2 is arranged on the two end surfaces of the power output ring 1, and the inner tapered hole 2.1 of the locking ring 2 matches the outer tapered sleeve 1.2 of the power output ring 1; a locating pin is inserted between the locking ring assembly positioning hole 2.6 and the output ring assembly positioning hole 1.1.4 to align the position of the locking ring axial connection hole 2.2 and the output ring axial connection hole 1.1.1, and then insert the connecting bolt; in this embodiment, the corresponding inner ring connection holes between the power output ring 1 and the locking ring 2 are provided with a bolt, and the bolt passes through the through hole of one locking ring 2 and the power output ring 1 and is screwed into the threaded hole of the other locking ring 2; the corresponding outer ring connection holes between the power output ring 1 and the locking ring 2 are provided with two bolts that penetrate each other, and both bolts are Pass through the through hole of the locking ring 2 and screw into the threaded hole of the power output ring 1; after all the bolts are inserted, tighten the connecting bolts one by one in a clockwise or counterclockwise direction in sequence and multiple rounds in an axially symmetrical manner, drive the locking ring 2 to move along the axis of the transmission shaft 3 toward the power output ring 1, and use the inner tapered hole 2.1 and the tapered surface of the outer tapered sleeve 1.2 to produce pressure, so that the inner hole of the outer tapered sleeve 1.2 is tightly held on the transmission shaft 3, and at the same time, a great pressure is also generated between the contact surface of the locking ring 2 and the power output ring body 1.1, so as to achieve the fixed connection between the power output ring 1 and the transmission shaft 3, and the fixed connection between the power output ring 1 and the locking ring 2 (the fixed connection surface between the power output ring 1 and the locking ring 2 includes two parts: the tapered hole of the locking ring 2 and the tapered surface of the outer tapered sleeve 1.2, and the contact surface between the locking ring 2 and the power output ring body 1.1); It is supplemented that: when the power is output in the middle of the transmission shaft, the power output ring body 1.1 is subjected to a great torque load, while the outer cone sleeve 1.2 is a thin-walled structure, and the geometric area (annular) of the connection part between the outer cone sleeve 1.2 and the power output ring body 1.1 is small. The shear force provided by the material (annular) of the connection part between the outer cone sleeve 1.2 and the power output ring body 1.1 is not enough to overcome the torque load borne by the power output ring body 1.1. Therefore, there are two paths for the load transmission of the power output connection structure in the middle of the lightweight transmission shaft: 1. The shear force of the connection material between the outer cone sleeve 1.2 and the power output ring body 1.1; 2. The friction between the conical surface of the outer cone sleeve 1.2 and the inner cone hole 2.1 of the locking ring 2, and the friction between the locking ring 2 and the contact surface of the power output ring body 1.1; When the transmission shaft 3 rotates, the transmission shaft 3 utilizes the friction between itself and the inner hole of the outer tapered sleeve 1.2 to drive the outer tapered sleeve 1.2 to rotate together with the transmission shaft 3; the outer tapered sleeve 1.2 transmits part of the torque to the power output ring body 1.1 through the shear force of the connecting material between it and the power output ring body 1.1, and at the same time, the outer tapered sleeve 1.2 transmits part of the torque to the locking ring 2 through the friction between the conical surface of the outer tapered sleeve 1.2 and the inner tapered hole 2.1 of the locking ring 2, and the locking ring 2 then transmits another part of the torque to the power output ring body 1.1 through the friction between the contact surface of the power output ring body 1.1, thereby ultimately ensuring the reliability of the power output of the transmission shaft 3.

[0020] In this embodiment, the power output connection structure in the middle of the lightweight transmission shaft includes only one power output ring 1 and two locking rings 2, which greatly reduces the number of parts and the overall weight of the connection structure, thereby reducing the cost of the power output connection structure in the middle of the lightweight transmission shaft and greatly reducing the difficulty of on-site assembly, thereby improving the economy of the enterprise; in addition, the two groups of connecting holes correspondingly arranged between the power output ring 1 and the locking ring 2, while realizing the axial connection of the power output ring 1 and the locking ring 2, also utilize the larger diameter of the pitch circle where the outer ring connecting hole is located to reinforce the strength of the power output ring 1 in the diameter direction, so as to solve the problem of decreased strength of the power output ring 1 after the original thick-walled annular body is removed.

[0021] Example 2, see the attached specification Figure 6-9 : In this embodiment, the power output ring 1 and the locking ring 2 are petal structures, the number of petals is two, and the power output ring 1 and the locking ring 2 are both semicircular ring structures; in order to ensure that the power output ring 1 and the locking ring 2 of the semicircular ring structure are accurately aligned during the assembly process, the petal splicing surface of the power output ring 1 is correspondingly provided with an output ring alignment hole 1.3, and the petal splicing surface of the locking ring 2 is correspondingly provided with a locking ring connecting hole 2.5; the locking ring connecting hole 2.5 on the petal splicing surface of one of the locking rings 2 is a threaded hole, and the locking ring connecting hole 2.5 on the petal splicing surface of the other locking ring 2 is a stepped hole (for passing the hexagon socket bolt, wherein the small diameter hole is a precision reaming hole), and the two petal locking rings 2 are spliced ​​and fixedly connected by bolts to form a Integral circular ring structure; in the petal structure locking ring 2 of this embodiment, there is no need to set flange edges for connecting the two petal structure locking rings 2, so the processing of the petal structure locking ring 2 is to obtain a complete locking ring 2 through turning and boring, and then obtain a two-petal structure locking ring 2 through wire cutting; compared with the locking ring 2 with a connecting flange edge obtained by welding in the past, or the locking ring 2 with a connecting flange edge processed by a machining center, the processing cost of this petal structure locking ring 2 can be greatly reduced; in addition, in order to facilitate the lifting process during the assembly process, the power output ring 1 is also provided with an output ring assembly lifting hole 1.4 on the petal splicing surface, and the locking ring 2 is also provided with a locking ring assembly lifting hole 2.3 on the outer circumferential surface; When assembling the lightweight transmission shaft middle power output connection structure of this embodiment, the two-petal power output ring 1 is arranged in an up-and-down manner, and the two-petal locking ring 2 is arranged in a front-and-back manner, and the splicing seam of the power output ring 1 and the splicing seam of the locking ring 2 are in a vertical state; the specific assembly steps are as follows: S21, splicing the power output ring 1: set one petal of the power output ring 1 at the lower part of the transmission shaft 3, fix it with an assembly bracket support frame, insert a positioning pin into the output ring alignment hole 1.3, and then set the other petal of the power output ring 1 at the upper part of the transmission shaft 3, the splicing surfaces of the two petals of the power output ring 1 are opposite, and the positioning pins are used to ensure that the splicing surfaces of the two petals of the power output ring 1 are aligned; S22. Splice the locking ring 2 at the left end of the power output ring 1: use a sling to set one locking ring 2 on the rear side of the transmission shaft 3, and use a sling to set the other locking ring 2 on the front side of the transmission shaft 3. The splicing surfaces of the two locking rings 2 are opposite to each other, and the two locking rings 2 are fixedly connected to form an integral circular ring structure with hexagon socket bolts through the locking ring connecting hole 2.5, and ensure that the splicing surfaces of the two locking rings 2 are aligned; when splicing the locking rings 2, a metal pad is provided between the splicing surfaces to compensate for the processing error caused by the wire cutting seam, to ensure that the inner tapered hole 2.1 in the integral locking ring 2 maintains its original processing size, accuracy and shape after connection, and to ensure the output torque of the power output connection structure in the middle of the lightweight transmission shaft after assembly; after the locking ring 2 at the left end of the power output ring 1 is spliced, it is set on the assembly movable bracket; the assembly movable bracket is pushed to move axially along the transmission shaft 3, so that the inner tapered hole 2.1 conflicts with the conical surface of the outer tapered sleeve 1.2; S23, splicing the locking ring 2 at the right end of the power output ring 1: the splicing method of the locking ring 2 at the right end of the power output ring 1 is the same as S2; after the locking ring 2 at the right end of the power output ring 1 is spliced, it is set on the assembly movable bracket; the assembly movable bracket is pushed to move axially along the transmission shaft 3, so that the inner tapered hole 2.1 conflicts with the conical surface of the outer tapered sleeve 1.2; S24, positioning the connection holes of the power output ring 1 and the locking ring 2: insert the positioning pin from the locking ring assembly positioning hole 2.6 at one end, pass through the output ring assembly positioning hole 1.1.4, and insert it into the locking ring assembly positioning hole 2.6 at the other end to complete the positioning of the connection holes of the power output ring 1 and the locking ring 2; S25. Locking and fixing of the power output ring 1 and the locking ring 2: insert the connecting bolts; tighten the connecting bolts one by one in a clockwise or counterclockwise direction in sequence and in multiple rounds in an axially symmetrical manner, drive the locking rings 2 at both ends to move synchronously along the axis of the transmission shaft 3 toward the power output ring 1, and utilize the inner tapered hole 2.1 to cooperate with the tapered surface of the outer tapered sleeve 1.2 to make the inner hole of the outer tapered sleeve 1.2 hug the transmission shaft 3, so as to achieve a fixed connection between the power output ring 1 and the transmission shaft 3.

[0022] In this embodiment, the load transfer path of the power output connection structure in the middle of the lightweight transmission shaft is the same as that in Embodiment 1 and will not be repeated herein; in this embodiment, the number of petals of the power output ring 1 and the locking ring 2 can also be set to three. When the number of petals is set to three, the angle between the splicing seam of the power output ring 1 and the splicing seam of the locking ring 2 is 60°; when the number of petals is set to three, the three-petal locking ring 2 needs to be fixedly connected by bolts to form a complete locking ring 2.

[0023] Example 3, see the attached specification Fig.10 , 11 , 12: In this embodiment, the power output ring 1 and the locking ring 2 are petal structures, the number of petals is two, and the power output ring 1 and the locking ring 2 are both semi-circular ring structures; in order to ensure that the power output ring 1 with a semi-circular ring structure is accurately positioned during the assembly process, the petal splicing surface of the power output ring 1 is correspondingly provided with an output ring alignment hole 1.3; in order to ensure that the locking ring 2 with a semi-circular ring structure is connected and positioned during the assembly process, a buckle joint 2.7 and a buckle groove 2.8 are correspondingly provided between the petal splicing surfaces of the locking ring 2, and at the same time, a semi-circular splicing hole A2.9 and a splicing hole B2.10 are correspondingly provided between the petal splicing surfaces of the locking ring 2, and the splicing hole A2.9 and the splicing hole B2.10 are both precision-reamed circular holes, conical holes or threaded holes; when the two-petal locking rings 2 are connected, the corresponding buckle joints 2.7 and The buckle groove 2.8 cooperates to buckle the two-petal locking ring 2 together, and then the two-petal locking ring 2 is fixedly connected by hammering a cylindrical pin, a conical pin or screwing a bolt into the finely reamed circular hole, the conical hole or the threaded hole; the connection structure of the split-petal locking ring 2 in this embodiment has the following advantages: 1. The processing cost of the locking ring 2 is low (the same as in the second embodiment); 2. The connection strength between the two-petal locking ring 2 is higher, and it can be used to transmit a larger torque; 3. Through the cooperation of the cylindrical pin, the conical pin or the bolt in the splicing hole A2.9 and the splicing hole B2.10, the processing error caused by the wire cutting seam can be eliminated, so that the inner tapered hole 2.1 in the overall locking ring 2 after connection maintains its original processing size, accuracy and shape, and fully guarantees the output torque of the power output connection structure in the middle of the lightweight transmission shaft after assembly; Supplementary explanation: The principle of eliminating the processing error caused by the wire cutting seam by matching the cylindrical pin, conical pin or bolt in the splicing hole A2.9 and the splicing hole B2.10 is shown in the appendix of the manual. Fig.13 , 14 , 15, 16: When the complete locking ring 2 is processed into two pieces of locking ring 2 by wire cutting, in order to improve the cutting efficiency, fast wire cutting is adopted, and the width of the cutting seam δ is about 0.2mm; see the attached manual Fig.13 , 14If the splicing holes A2.9 and the splicing holes B2.10 are arranged to be assembled with cylindrical pins, conical pins or bolts, after assembly, due to the pressure on the wall of the inner tapered hole 2.1, the two locking rings 2 move to the left and right sides, and the adjacent inner surfaces of the two buckle joints 2.7 collide with each other, and the design diameter D of the inner tapered hole 2.1 in the left and right direction will become D+δ, that is, the design diameter D of the inner tapered hole 2.1 in the left and right direction increases by 0.2mm. The increase in the design diameter D of the inner tapered hole 2.1 in the left and right direction will seriously affect the locking force of the locking ring 2 after splicing, thereby affecting the output torque of the power output connection structure in the middle of the lightweight transmission shaft after assembly; see the attached manual Fig.15 , 16 , after the splicing holes A2.9 and the splicing holes B2.10 are assembled with cylindrical pins, conical pins or bolts, even if the hole wall of the inner tapered hole 2.1 is subjected to pressure after assembly, due to the supporting effect of the cylindrical pins, conical pins or bolts, there will always be a wire cutting seam δ between the adjacent inner surfaces of the two buckle joints 2.7, so that the design diameter D in the left and right directions of the inner tapered hole 2.1 will remain unchanged after assembly, so that the inner tapered hole 2.1 in the integral locking ring 2 after connection maintains its original processing size, accuracy and shape, and the output torque of the power output connection structure in the middle of the lightweight transmission shaft after assembly is fully guaranteed; in addition, when only the splicing hole B2.10 is set, there can always be a wire cutting seam δ between the adjacent inner surfaces of the two buckle joints 2.7, but it cannot The two-petal locking ring 2 is made to become a whole during the assembly process (when there is no splicing hole A2.9, the line cutting seam δ between the adjacent surfaces on the outer side of the buckle joint 2.7 cannot be maintained, and the two-petal locking ring 2 still moves in the left and right directions, so that the cylindrical pin, conical pin or bolt in the splicing hole B2.10 is in a loose state). When locking the axial connecting bolt, the synchronous movement of the two-petal locking ring 2 in the axial direction of the transmission shaft 3 cannot be guaranteed, so it will still affect the final assembly result, and thus it is impossible to fully guarantee the output torque of the lightweight transmission shaft middle power output connection structure after assembly; that is, in this embodiment, the splicing hole A2.9 and the splicing hole B2.10 must exist at the same time to fully guarantee the locking force of the lightweight transmission shaft middle power output connection structure after assembly; When assembling the lightweight transmission shaft middle power output connection structure of this embodiment, the two-petal power output ring 1 is arranged in an up-and-down manner, and the two-petal locking ring 2 is arranged in a front-and-back manner, and the splicing seam of the power output ring 1 and the splicing seam of the locking ring 2 are in a vertical state; the specific assembly steps are as follows: S31, splicing the power output ring 1: set one petal of the power output ring 1 at the lower part of the transmission shaft 3, fix it with an assembly bracket support frame, insert a positioning pin into the output ring alignment hole 1.3, and then set the other petal of the power output ring 1 at the upper part of the transmission shaft 3, the splicing surfaces of the two petals of the power output ring 1 are opposite, and the positioning pins are used to ensure that the splicing surfaces of the two petals of the power output ring 1 are aligned; S32, splicing the locking ring 2 at the left end of the power output ring 1: use a sling to set one locking ring 2 at the rear side of the transmission shaft 3, and use a sling to set the other locking ring 2 at the front side of the transmission shaft 3. The two locking rings 2 are connected by a buckle joint 2.7 and a buckle groove 2.8, and are set on the assembly movable bracket; the end faces of the two locking rings 2 are aligned through the positioning end faces of the assembly movable bracket, and then cylindrical pins, conical pins or bolts are driven into the splicing holes A2.9 and the splicing holes B2.10 to fix the two locking rings 2 into an integral structure; after the locking ring 2 at the left end of the power output ring 1 is spliced, the assembly movable bracket is pushed to move axially along the transmission shaft 3, so that the inner tapered hole 2.1 conflicts with the conical surface of the outer tapered sleeve 1.2; S33, splicing the locking ring 2 at the right end of the power output ring 1: the splicing method of the locking ring 2 at the right end of the power output ring 1 is the same as S2; after the splicing of the locking ring 2 at the right end of the power output ring 1 is completed, the assembly movable bracket is pushed to move axially along the transmission shaft 3, so that the inner tapered hole 2.1 conflicts with the conical surface of the outer tapered sleeve 1.2; S34, positioning the connection holes of the power output ring 1 and the locking ring 2: insert the positioning pin from the locking ring assembly positioning hole 2.6 at one end, pass through the output ring assembly positioning hole 1.1.4, and insert it into the locking ring assembly positioning hole 2.6 at the other end to complete the positioning of the connection holes of the power output ring 1 and the locking ring 2; S35. Locking and fixing of the power output ring 1 and the locking ring 2: insert the connecting bolts; tighten the connecting bolts one by one in a clockwise or counterclockwise direction in sequence and in multiple rounds in an axially symmetrical manner, drive the locking rings 2 at both ends to move synchronously along the axis of the transmission shaft 3 toward the power output ring 1, and utilize the inner tapered hole 2.1 to cooperate with the tapered surface of the outer tapered sleeve 1.2 to make the inner hole of the outer tapered sleeve 1.2 hug the transmission shaft 3, so as to achieve a fixed connection between the power output ring 1 and the transmission shaft 3.

[0024] Example 4, see the attached specification Fig.13 : The structure of this embodiment is basically the same as that of the first embodiment, except that the corresponding outer ring connecting holes between the power output ring 1 and the locking ring 2 are fixedly connected by only one bolt, and the bolt passes through the through hole of one locking ring 2 and the power output ring 1, and is screwed into the threaded hole of the other locking ring 2.

[0025] Example 5, see the attached specification Fig.14 : Compared with the first embodiment, the structure of this embodiment has an outer conical sleeve 1.2 on only one end face of the power output ring 1; this structure can be used when the output load of the transmission shaft 3 is small, and can further reduce the overall weight of the power output connection structure in the middle of the lightweight transmission shaft.

[0026] It should be understood that the present solution is not limited to the above-mentioned specific implementation methods, and the equipment, tooling and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present solution without departing from the scope of the technical solution of the present solution, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essential content 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 falls within the scope of protection of the technical solution of the present solution.

[0027] Parts of the present invention not described in detail are prior art.

Claims

1. A lightweight transmission shaft middle power output connection structure, characterized by: The invention comprises a power output ring (1) and a locking ring (2); the power output ring (1) is provided with an outer tapered sleeve (1.2), and the locking ring (2) is provided with an inner tapered hole (2.1); the power output ring (1) is arranged on the outer cylindrical surface of a transmission shaft (3), and the locking ring (2) is arranged outside the outer tapered sleeve (1.2); the power output ring (1) and the locking ring (2) are fixedly connected by an axial connecting bolt, and the power output ring (1) is fixedly connected to the transmission shaft (3) by the outer tapered sleeve (1.2) and the tapered surface of the inner tapered hole (2.1) being matched; two groups of connecting holes are correspondingly arranged around the axis between the power output ring (1) and the locking ring (2); and the power output connecting holes (1.1.2) are evenly distributed around the axis on the power output ring (1).

2. According to claim 1, the lightweight transmission shaft middle power output connection structure is characterized by: The power output ring (1) and the locking ring (2) are of a petal structure; the number of petals of the power output ring (1) and the locking ring (2) is more than two.

3. According to claim 2, the lightweight transmission shaft middle power output connection structure is characterized by: Buckle joints (2.7) and buckle grooves (2.8) are provided correspondingly between the spliced ​​surfaces of adjacent locking rings (2).

4. According to claim 3, the lightweight transmission shaft middle power output connection structure is characterized by: Semicircular splicing holes A (2.9) and splicing holes B (2.10) are correspondingly provided between the splicing surfaces of the adjacent locking rings (2); the splicing holes A (2.9) and the splicing holes B (2.10) are both precision-reamed circular holes, conical holes or threaded holes.

5. According to claim 2, the lightweight transmission shaft middle power output connection structure is characterized by: Locking ring connection holes (2.5) are correspondingly provided between the splicing surfaces of adjacent locking rings (2).

6. The lightweight transmission shaft middle power output connection structure according to claim 1 is characterized by: An outer cone sleeve (1.2) is provided on one or both sides of the power output ring (1).

7. The lightweight transmission shaft middle power output connection structure according to claim 2 is characterized by: Alignment holes are correspondingly provided on the split joint surfaces of the power output ring (1).

8. The lightweight transmission shaft middle power output connection structure according to claim 1 is characterized by: An assembly positioning hole and a disassembly ejection hole are correspondingly provided between the power output ring (1) and the locking ring (2) along the axial direction.

9. An assembly method based on the lightweight transmission shaft middle power output connection structure according to claim 5, characterized in that: The specific assembly steps are as follows: S21, splicing the power output ring (1): setting one petal of the power output ring (1) on the lower part of the transmission shaft (3), inserting a positioning pin into the output ring alignment hole (1.3), setting the other petal of the power output ring (1) on the upper part of the transmission shaft (3), and ensuring that the splicing surfaces of the two petals of the power output ring (1) are aligned by the positioning pin; S22, splicing the locking ring (2): one locking ring (2) is arranged on the rear side of the transmission shaft (3), and the other locking ring (2) is arranged on the front side of the transmission shaft (3), with the splicing surfaces of the two locking rings (2) facing each other, and the two locking rings (2) are fixedly connected by bolts; after the locking rings (2) are spliced, the locking rings (2) are pushed to move axially along the transmission shaft (3), so that the inner tapered hole (2.1) contacts the conical surface of the outer tapered sleeve (1.2); S23, positioning the connection holes of the power output ring (1) and the locking ring (2): inserting positioning pins into the locking ring assembly positioning hole (2.6) and the output ring assembly positioning hole (1.1.4) to complete the positioning of the connection holes of the power output ring (1) and the locking ring (2); S24. Locking and fixing the power output ring (1) and the locking ring (2): insert the connecting bolts; tighten the connecting bolts one by one in a clockwise or counterclockwise direction in an axially symmetrical manner in multiple rounds, drive the locking ring (2) to move along the axis of the transmission shaft (3) toward the power output ring (1), and use the inner tapered hole (2.1) and the tapered surface of the outer tapered sleeve (1.2) to make the inner hole of the outer tapered sleeve (1.2) hold the transmission shaft (3) tightly, so as to achieve a fixed connection between the power output ring (1) and the transmission shaft (3).

10. An assembly method based on the lightweight transmission shaft middle power output connection structure according to claim 4, characterized in that: The specific assembly steps are as follows: S31, splicing the power output ring (1): setting one petal of the power output ring (1) on the lower part of the transmission shaft (3), inserting a positioning pin into the output ring alignment hole (1.3), setting the other petal of the power output ring (1) on the upper part of the transmission shaft (3), and ensuring that the splicing surfaces of the two petals of the power output ring (1) are aligned by the positioning pin; S32, splicing the locking ring (2): one locking ring (2) is arranged on the rear side of the transmission shaft (3), and the other locking ring (2) is arranged on the front side of the transmission shaft (3), with the splicing surfaces of the two locking rings (2) facing each other, connected by a buckle joint (2.7) and a buckle groove (2.8), and fixed by driving a cylindrical pin or a conical pin into the splicing hole A (2.9) and the splicing hole B (2.10), so that the two locking rings (2) are spliced ​​into an integral structure; after the locking rings (2) are spliced, the locking rings (2) are pushed to move axially along the transmission shaft (3), so that the inner tapered hole (2.1) and the conical surface of the outer tapered sleeve (1.2) are in contact with each other; S33, positioning the connection holes of the power output ring (1) and the locking ring (2): inserting positioning pins into the locking ring assembly positioning hole (2.6) and the output ring assembly positioning hole (1.1.4) to complete the positioning of the connection holes of the power output ring (1) and the locking ring (2); S34. Locking and fixing the power output ring (1) and the locking ring (2): insert the connecting bolts; tighten the connecting bolts one by one in a clockwise or counterclockwise direction in an axially symmetrical manner in multiple rounds, drive the locking ring (2) to move along the axis of the transmission shaft (3) toward the power output ring (1), and use the inner tapered hole (2.1) and the tapered surface of the outer tapered sleeve (1.2) to make the inner hole of the outer tapered sleeve (1.2) hold the transmission shaft (3) tightly, so as to achieve a fixed connection between the power output ring (1) and the transmission shaft (3).

Images