Shaft tail force seal non-destructive assembly tool assembly

Abstract

This application provides a non-destructive assembly tooling assembly for a shaft tail seal. The assembly includes an expansion sleeve 61, a sleeve 62, a push rod 63, and a slide rod 64. The expansion sleeve 61 has a protrusion 611, an internal thread 612, and a conical surface 613. The expansion sleeve 61 is a hollow conical structure. The inner wall of the expansion sleeve 61 has an internal thread 612, and the outer surface of the expansion sleeve 61 is a conical surface 613. The conical surface 613 has an annular protrusion 611 along its circumferential direction. The sleeve 62 is provided with… The sleeve 62 has an expansion section 621, a positioning section 622, a through hole 623, an opening groove 624, an annular groove 625, a conical surface 626, and a stop surface 627. The sleeve 62 is a hollow structure, with an expansion section 621 at one end. The inner surface of the expansion section 621 is a conical hole structure used to place the expansion sleeve 61. Two symmetrical opening grooves 624 are provided radially at two positions on the expansion section 621. The expansion section 621 of the sleeve 62 has a circumferential annular groove 625 on its inner side.

Description

Technical Field

[0001] This invention belongs to the field of mechanical engineering, specifically relating to a non-destructive assembly tooling component for a shaft tail force seal. Background Technology

[0002] The shaft tail seal is a lip seal made of polytetrafluoroethylene (PTFE). Its working principle is as follows: In the free state, the inner diameter of the sealing lip is smaller than the shaft diameter, that is, there is a certain interference fit. After the shaft tail seal is installed on the shaft, the pressure of its cutting edge and the shrinkage force of the material itself generate a certain radial clamping force on the sealing shaft, blocking the leakage gap and achieving the purpose of sealing.

[0003] As shown in Figure 1, the existing tooling structure for assembling the tail-end force seal has a cylindrical structure at one end and a conical annular structure at the other end. During the assembly of the tail-end force seal, the cylindrical end of the assembly tooling is inserted into the inner hole of the drive gear. Then, the tail-end force seal is fitted onto the conical annular surface of the tooling and carefully pushed manually until it reaches the stop position. Finally, the hole is secured with an elastic retaining ring fitted into the retaining ring groove of the gear pump housing.

[0004] The inability to secure the tooling results in it frequently falling off or becoming misaligned during assembly, which in turn damages the shaft tail seal. Summary of the Invention

[0005] This invention provides a non-destructive assembly tooling component 60 for a shaft tail force seal, which solves the problems of assembly tooling not being able to be fixed and eccentricity, thereby preventing the assembly tooling from loosening, greatly improving assembly efficiency, reducing workload, and reducing the wear rate of the shaft tail force seal.

[0006] Technical solution: A non-destructive assembly tooling component 60 for a shaft tail seal, comprising an expansion sleeve 61, a sleeve 62, a push rod 63, and a sliding rod 64, wherein: The expansion sleeve 61 is provided with a protrusion 611, an internal thread 612, and a conical surface 613. The expansion sleeve 61 has a hollow conical structure. The inner wall of the expansion sleeve 61 is provided with an internal thread 612, and the outer surface of the expansion sleeve 61 is a conical surface 613. An annular protrusion 611 is provided on the conical surface 613 along the circumferential direction. The sleeve 62 is provided with an expansion section 621, a positioning section 622, a through hole 623, an opening groove 624, an annular groove 625, a second conical surface 626, and a stop surface 627. The sleeve 62 has a hollow structure. One end of the sleeve 62 is an expansion section 621. The inner surface of the expansion section 621 is a conical hole structure used to place the expansion sleeve 61. Two symmetrical positions on the expansion section 621 are provided. The sleeve 62 has radially arranged opening slots 624. The expansion section 621 of the sleeve 62 has a circumferential annular groove 625 on its inner side. The outer side of the middle section of the sleeve 62 has a circumferential annular positioning section 622. The sleeve 62 has a through hole 623 on the other side of the annular groove 625. The outer surface of the sleeve 62 relative to the through hole 623 is a conical surface 626 and a stop surface 627. The other end face of the sleeve 62 relative to the expansion section 621 is the stop surface 627. The push rod 63 has a push rod 631 and a positioning hole 632. Both the push rod 631 and the positioning hole 632 are hollow structures. The inner diameter of the push rod 631 is larger than the inner diameter of the positioning hole 632. The slide rod 64 is provided with an external thread 641, a smooth rod 642, a second stop surface 643, an external hexagonal 644, and a positioning rod 645. The slide rod 64 is a rod-shaped structure. From one end to the other, the slide rod 64 is provided with an external thread 641, a smooth rod 642, and a positioning rod 645 in sequence. An external hexagonal 644 is provided between the smooth rod 642 and the positioning rod 645. The end face of the external hexagonal 644 near the external thread 641 is the second stop surface 643. The slide rod 64 passes through the expansion sleeve 61, the sleeve 62, and the push rod 63 in sequence. The external thread 641 of the slide rod 64 is fastened to the internal thread 612 of the expansion sleeve 61. The smooth rod 642 passes through the through hole 623 of the sleeve 62. The second stop surface 643 of the slide rod 64 is in contact with the first stop surface 627 of the sleeve 62. The positioning rod 645 of the slide rod 64 passes through the positioning hole 632 of the push rod 63.

[0007] Furthermore, the expansion section 621 of the sleeve 62 mates with the expansion sleeve 61; the positioning section 622 of the sleeve 62 mates with the drive gear 4; the through hole 623 of the sleeve 62 and the smooth rod 642 of the slide rod 64 are in clearance fit, allowing for smooth passage; the opening groove 624 and the annular groove 625 of the sleeve 62 ensure that the expansion section 621 of the sleeve 62 has a large deformation amount; the conical surface 626 of the sleeve 62 ensures that the shaft tail seal 3 deforms slowly and smoothly during the assembly process, thereby achieving non-destructive assembly; the smooth movement of the expansion sleeve 61 in the sleeve 62 is ensured by rotating the slide rod 64; as the expansion sleeve 61 slides in the sleeve 62, the expansion section 621 of the sleeve 62 deforms, and the fit with the inner hole of the drive gear 4 changes from clearance fit to interference fit, which serves to fix the tooling assembly 60; the positioning section 622 and the inner hole of the drive gear 4 are in a small clearance fit, which serves to position the sleeve 62.

[0008] Furthermore, the positioning hole 632 of the push rod 63 and the positioning rod 645 of the slide rod 64 are in a small clearance fit; when the sleeve 62 and the drive gear 4 are in an interference fit, the push rod 63 is pushed, and the push rod 63 pushes the shaft tail force seal 3 to the mounting hole.

[0009] Furthermore, the thread length of the external thread 641 of the slide rod 64 is 5-8 mm longer than the internal thread 612 of the expansion sleeve 61; the smooth rod 642 of the slide rod 64 and the through hole 623 of the sleeve 62 are in a large clearance fit; the external hexagon 644 of the slide rod 64 plays a tightening role, and tightening the external hexagon 644 of the slide rod 64 with a wrench ensures that the expansion sleeve 61 slides in the sleeve 62; the positioning rod 645 of the slide rod 64 plays a positioning role for the push rod 63.

[0010] Furthermore, during the assembly of the shaft tail seal 3, the expansion sleeve 61, sleeve 62, and slide rod 64 are inserted into the inner hole of the drive gear 4 as a whole. At this time, the drive gear 4 and the non-destructive assembly tooling assembly 60 are in clearance fit. By rotating the slide rod 64, the expansion sleeve 61 slides toward the sleeve 62. As the expansion sleeve 61 slides, the fit between the non-destructive assembly tooling assembly 60 and the inner hole of the drive gear 4 gradually changes from clearance fit to interference fit. At this time, the non-destructive assembly tooling assembly 60 and the inner hole of the drive gear 4 are fixed. Place the tail seal 3 onto the conical surface of the sleeve 62, and put the push rod 63 onto the slide rod 64. Push the push rod 63 until the tail seal 3 is assembled into the stop position.

[0011] Furthermore, after assembly, remove push rod 63 and rotate slide rod 64 in the opposite direction. The fit between non-destructive assembly tooling assembly 60 and the inner hole of drive gear 4 gradually changes from interference fit to clearance fit. Remove non-destructive assembly tooling assembly 60.

[0012] Furthermore, L1 is the length of the expansion sleeve 61, L1 = 8~10mm; L2 is the length of the conical hole in the expansion section 621 of sleeve 62, L2-L1=3~5mm; L3 is the length of the annular groove 625 of the sleeve 62, L3 = 2~3mm; L4 is the length from one end of the conical surface 626 of sleeve 62 to the stop surface 627, L5 is the total length of sleeve 62, L9 is the length of the outer hexagon 644 of sliding rod 64, L6-L4-L9=5~8mm; L7 is the length of the external thread 641 of the slide rod 64, L7-L1=3~5mm; L8 is the total length of the external thread 641 of the slide rod 64 and the smooth rod 642, L8=L5; L10 is the length of the sliding rod 64 and the positioning rod 645, L10 = 20~30mm.

[0013] Furthermore, φ1 is the angle of the conical surface 613 of the expansion sleeve 61, and φ2 is the angle of the conical hole 621 of the expansion section of the sleeve 62. The dimensions of φ1 and φ2 are kept consistent, and the small gap is ensured by tolerance.

[0014] In summary, the present invention provides a non-destructive assembly tooling component for a shaft tail force seal, which significantly improves assembly efficiency, eliminates the need for skilled assembly workers, and reduces the loss rate of the shaft tail force seal during assembly from 30% to 0, resulting in a significant reduction in loss rate. Attached Figure Description

[0015] Figure 1-1 This is a schematic diagram of the existing assembly tooling; Figure 1-2 A diagram illustrating the usage effect of existing assembly tooling; Figure 2 A schematic diagram of a non-destructive assembly tooling assembly for a shaft tail seal provided in this application; Figure 3 A diagram of an expansion sleeve structure is provided for this application; Figure 4 A sleeve structure diagram provided for this application; Figure 5 A push rod structure diagram provided in this application; Figure 6 A structural diagram of a sliding rod is provided in this application; Figure 7 The following is a diagram illustrating the usage effect of a non-destructive assembly tooling component for a shaft tail seal provided in this application; Among them, 1-gear pump housing, 2-O-ring rubber seal, 3-shaft tail force seal, 4-drive gear, 5-elastic retaining ring for hole, 6-assembly fixture, 60-shaft tail force seal non-destructive assembly fixture assembly, 61-expansion sleeve, 62-sleeve, 63-push rod, 64-slide rod, 611-protrusion, 612-internal thread, 613-cone surface one, 621-expansion section, 622-positioning section, 623-through hole, 624-opening groove, 625-annular groove, 626-cone surface two, 627-stop surface one, 631-push rod, 632-positioning hole, 641-external thread, 642-smooth rod, 643-stop surface two, 644-hexagonal, 645-positioning rod. Detailed Implementation

[0016] The current shortcomings of the shaft tail seal assembly technology are that the assembly tooling (such as...) Figure 1-1 (As shown) After inserting into the inner hole of the drive gear, the assembly fixture cannot be fixed, such as... Figure 1-2 As shown. Therefore, loosening or misalignment of the assembly fixture often leads to damage during the assembly of the shaft tail force seal. Furthermore, because the assembly fixture and the inner bore of the drive gear have a clearance fit, there is a problem during assembly where the eccentricity of the shaft tail force seal can cause it to collide with the tip of the drive gear, resulting in damage. This method leads to a high loss rate for the shaft tail force seal, limiting its application.

[0017] The present invention aims to solve the problems of assembly tooling not being able to be fixed and being eccentric, thereby preventing the assembly tooling from becoming loose, greatly improving assembly efficiency, reducing workload, and reducing the wear rate of the shaft tail force seal.

[0018] Example 1 To achieve the above objectives, the structure of the assembly tooling has been improved in this invention: the fixed sleeve structure has been replaced with a deformable and expandable sleeve structure. like Figure 2 As shown, to achieve the above objectives, the present invention provides a non-destructive assembly tooling component 60 for a shaft tail force seal, comprising an expansion sleeve 61, a sleeve 62, a push rod 63, and a sliding rod 64, wherein: like Figure 3 As shown, the expansion sleeve 61 is provided with a protrusion 611, an internal thread 612, and a conical surface 613; the expansion sleeve 61 has a hollow conical structure, the inner wall surface of the expansion sleeve 61 is provided with an internal thread 612, the outer surface of the expansion sleeve 61 is a conical surface 613, and an annular protrusion 611 is provided circumferentially on the conical surface 613; as shown Figure 4As shown, the sleeve 62 is provided with an expansion section 621, a positioning section 622, a through hole 623, an opening groove 624, an annular groove 625, a second conical surface 626, and a first stop surface 627. The sleeve 62 is a hollow structure. One end of the sleeve 62 is the expansion section 621. The inner surface of the expansion section 621 is a conical hole structure used to place the expansion sleeve 61. Two symmetrical positions on the expansion section 621 are respectively provided with radially arranged opening grooves 624. The inner side of the expansion section 621 of the sleeve 62 is provided with a circumferential annular groove 625. The outer side of the middle section of the sleeve 62 is provided with a circumferential annular positioning section 622. The inside of the sleeve 62, on the other side of the annular groove 625, is the through hole 623. The outer surface of the sleeve 62 relative to the through hole 623 is a second conical surface 626 and a first stop surface 627. The other end face of the sleeve 62 relative to the expansion section 621 is the first stop surface 627. Figure 5 As shown, the push rod 63 is provided with a push rod 631 and a positioning hole 632. Both the push rod 631 and the positioning hole 632 are hollow structures, and the inner diameter of the push rod 631 is larger than the inner diameter of the positioning hole 632; Figure 6 As shown, the slide rod 64 is provided with an external thread 641, a smooth rod 642, a second stop surface 643, an external hexagonal 644, and a positioning rod 645. The slide rod 64 is a rod-shaped structure. From one end to the other end, the slide rod 64 is provided with an external thread 641, a smooth rod 642, and a positioning rod 645 in sequence. An external hexagonal 644 is provided between the smooth rod 642 and the positioning rod 645. The end face of the external hexagonal 644 near the external thread 641 is the second stop surface 643. The slide rod 64 passes through the expansion sleeve 61, the sleeve 62, and the push rod 63 in sequence. The external thread 641 of the slide rod 64 is fastened to the internal thread 612 of the expansion sleeve 61. The smooth rod 642 passes through the through hole 623 of the sleeve 62. The second stop surface 643 of the slide rod 64 is in contact with the first stop surface 627 of the sleeve 62. The positioning rod 645 of the slide rod 64 passes through the positioning hole 632 of the push rod 63.

[0019] Specifically, the protrusion 611 ensures that during operation, the expansion sleeve 61 slides to expand the expansion section of the sleeve 62, thereby fixing the assembly tooling assembly 60; at the same time, the expansion sleeve 61 and the sleeve 62 will not self-lock when the threads are loosened; the internal thread 612 and the external thread 641 of the slide rod 64 interact to ensure that the expansion sleeve 61 can slide normally in the expansion section of the sleeve 62; the conical surface 613 structure ensures that the expansion section of the expansion sleeve 61 expands normally during the sliding of the sleeve 61 in the sleeve 62, thereby fastening the non-destructive assembly tooling assembly 60 to the drive gear 4, and at the same time, after the work is completed, the expansion section can return to its normal state, thereby loosening the non-destructive assembly tooling assembly 60 from the drive gear 4, making it convenient to disassemble the non-destructive assembly tooling assembly 60 after the work is completed.

[0020] Specifically, the expansion section 621 of sleeve 62 mates with the expansion sleeve 61; the positioning section 622 of sleeve 62 mates with the drive gear 4; the through hole 623 of sleeve 62 and the smooth rod 642 of slide rod 64 are clearance fit, allowing for smooth passage; the opening groove 624 and the annular groove 625 of sleeve 62 ensure that the expansion section 621 of sleeve 62 has a large deformation amount; the second conical surface 626 of sleeve 62 ensures that the shaft tail force seal 3 deforms slowly and smoothly during the assembly process, thereby achieving non-destructive assembly; the first stop surface 627 of sleeve 62 mates with the second stop surface 643 of slide rod 64, maintaining contact between the two stop surfaces during operation. According to the working principle of the thread, the axial dimensions of sleeve 62 and slide rod 64 remain unchanged, and the smooth movement of expansion sleeve 61 in sleeve 62 can be ensured simply by rotating slide rod 64. During operation, as the expansion sleeve 61 slides within the sleeve 62, the expansion section 621 of the sleeve 62 deforms, changing its fit with the inner hole of the drive gear 4 from a clearance fit to an interference fit, thus fixing the tooling assembly 60. The positioning section 622 has a small clearance fit with the inner hole of the drive gear 4, serving to position the sleeve 62.

[0021] Specifically, the positioning hole 632 of the push rod 63 and the positioning rod 645 of the slide rod 64 are in a small clearance fit to prevent the push rod 63 from being misaligned, which would adversely affect the assembly of the shaft tail force seal 3. During operation, when the sleeve 62 and the drive gear 4 are in an interference fit, the push rod 63 can be pushed, and the push rod 63 will gently push the shaft tail force seal 3 to the mounting hole.

[0022] Specifically, the external thread 641 of the slide rod 64 mates with the internal thread 612 of the expansion sleeve 61, ensuring that the thread length of the external thread 641 of the slide rod 64 is 5-8 mm longer than that of the internal thread 612 of the expansion sleeve 61; the smooth rod 642 of the slide rod 64 and the through hole 623 of the sleeve 62 have a large clearance fit; the external hexagon 644 of the slide rod 64 mainly serves a tightening function, which is achieved by tightening the external hexagon 644 of the slide rod 64 with a wrench to ensure that the expansion sleeve 61 slides in the sleeve 62; the positioning rod 645 of the slide rod 64 positions the push rod 63.

[0023] Preferably, L1 is the length of the expansion sleeve 61, and L1 = 8~10mm; Preferably, L2 is the length of the conical hole in the expansion section 621 of the sleeve 62, and L2-L1=3~5mm; Preferably, L3 is the length of the annular groove 625 of the sleeve 62, and L3 = 2 to 3 mm; Preferably, L4 is the length from one end of the conical surface 626 of the sleeve 62 to the stop surface 627, L5 is the total length of the sleeve 62, L9 is the length of the outer hexagon 644 of the sliding rod 64, and L6-L4-L9=5~8mm; Preferably, L7 is the length of the external thread 641 of the slide rod 64, and L7-L1=3~5mm; Preferably, L8 is the total length of the external thread 641 of the slide rod 64 and the smooth rod 642, and L8 = L5; Preferably, L10 is the length of the sliding rod 64 and the positioning rod 645, and L10 = 20~30mm; Preferably, φ1 is the angle of the conical surface 613 of the expansion sleeve 61, and φ2 is the angle of the conical hole 621 of the expansion section of the sleeve 62. The dimensions of φ1 and φ2 are kept consistent, and a small gap is ensured by tolerance.

[0024] It should be noted that the expansion sleeve 61 can expand the sleeve 62 by sliding, thereby fixing the assembly tooling component 60. At the same time, the expansion sleeve 61 and the sleeve 62 will not self-lock when the threads are loosened.

[0025] The threaded structure of the expansion sleeve 61 and the slide rod 64 ensures that the expansion sleeve 61 can slide by rotating the slide rod, thereby allowing the assembly tooling components to be freely disassembled.

[0026] Specifically, during the assembly of the tail-end force seal 3, the expansion sleeve 61, sleeve 62, and slide rod 64 are first inserted as a whole into the inner hole of the drive gear 4. At this time, the drive gear 4 and the non-destructive assembly tooling assembly 60 are in clearance fit. Then, by rotating the slide rod 64, the expansion sleeve 61 slides towards the sleeve 62. As the expansion sleeve 61 slides, the fit between the non-destructive assembly tooling assembly 60 and the inner hole of the drive gear 4 gradually changes from clearance fit to interference fit. At this time, the sleeve 62 should be fixed to the inner hole of the drive gear 4. Finally, the tail-end force seal 3 is placed on the conical surface of the sleeve 62, and the push rod 63 is fitted onto the slide rod 64. The push rod 63 is pushed until the tail-end force seal 3 is assembled into the stop position, thus completing the assembly.

[0027] Specifically, after assembly, remove push rod 63 and rotate slide rod 64 in the opposite direction. The fit between non-destructive assembly tooling component 60 and the inner hole of drive gear 4 gradually changes from interference fit to clearance fit. Then, non-destructive assembly tooling component 60 can be removed.

[0028] Example 2 like Figure 7 As shown in the embodiment of this application, the non-destructive assembly tooling assembly 60 can effectively fix the shaft tail force seal 3 during assembly, preventing any loosening. Based on the implementation results, the non-destructive assembly tooling assembly 60 is easy to operate, has high assembly efficiency, and can significantly reduce the wear rate of the shaft tail force seal 3.

[0029] During assembly, the drive gear 4 and O-ring rubber seal 2 are first assembled into the gear pump housing 1. Then, the non-destructive assembly tooling assembly 60 is inserted into the inner hole of the drive gear 4, at which point the non-destructive assembly tooling assembly 60 and the inner hole of the drive gear 4 are in clearance fit. By rotating the slide rod 64, the expansion sleeve 61 slides towards the sleeve 62. As the expansion sleeve 61 slides, the fit between the non-destructive assembly tooling assembly 60 and the inner hole of the drive gear 4 gradually changes from clearance fit to interference fit, at which point the non-destructive assembly tooling assembly 60 is fixed. The shaft tail force seal 3 is placed on the conical surface 626 of the non-destructive assembly tooling assembly 60, and the push rod 63 is fitted onto the slide rod 64. The push rod 63 is pushed until the shaft tail force seal 3 is assembled into the stop position. The hole elastic retaining ring 5 is then assembled into the retaining ring groove in the gear pump housing 1, thus completing the assembly.

[0030] After assembly, remove push rod 63 and rotate slide rod 64 in the opposite direction. The fit between non-destructive assembly tooling component 60 and the inner hole of drive gear 4 gradually changes from interference fit to clearance fit. Then non-destructive assembly tooling component 60 can be removed.

Claims

1. A non-destructive assembly tooling component for a shaft tail force seal, characterized in that, The non-destructive assembly tooling for the shaft tail seal includes an expansion sleeve (61), a sleeve (62), a push rod (63), and a sliding rod (64), wherein: The expansion sleeve (61) is provided with a protrusion (611), an internal thread (612), and a conical surface (613); the expansion sleeve (61) is a hollow conical structure, the inner wall of the expansion sleeve (61) is provided with an internal thread (612), the outer surface of the expansion sleeve (61) is a conical surface (613), and an annular protrusion (611) is provided on the conical surface (613) along the circumferential direction; the sleeve (62) is provided with an expansion section (621), a positioning section (622), a through hole (623), an opening groove (624), an annular groove (625), a second conical surface (626), and a first abutment surface (627); the sleeve (62) is a hollow structure, one end of the sleeve (62) is an expansion section (621), the inner surface of the expansion section (621) is a conical hole structure, used to place the expansion sleeve (61), and two symmetrical protrusions on the expansion section (621) are provided. Each position is provided with a radially arranged opening groove (624). The expansion section (621) of the sleeve (62) is provided with a circumferential annular groove (625) on the inner side. The outer side of the middle section of the sleeve (62) is provided with a circumferential annular positioning section (622). The inside of the sleeve (62) is located on the other side of the annular groove (625) as a through hole (623). The outer surface of the sleeve (62) relative to the through hole (623) is a cone surface two (626) and a stop surface one (627). The other end face of the sleeve (62) relative to the expansion section (621) is a stop surface one (627). The push rod (63) is provided with a push rod (631) and a positioning hole (632). Both the push rod (631) and the positioning hole (632) are hollow structures. The inner diameter of the push rod (631) is larger than the inner diameter of the positioning hole (632). The slide rod (64) is provided with an external thread (641), a smooth rod (642), a stop surface (643), an external hexagon (644), and a positioning rod (645). The slide rod (64) is a rod-shaped structure. From one end to the other end, the slide rod (64) is provided with an external thread (641), a smooth rod (642), and a positioning rod (645). An external hexagon (644) is provided between the smooth rod (642) and the positioning rod (645). The end face of the external hexagon (644) near the external thread (641) is the stop surface. 2 (643); the slide rod (64) passes through the expansion sleeve (61), the sleeve (62), and the push rod (63) in sequence; the external thread (641) of the slide rod (64) is fastened to the internal thread (612) of the expansion sleeve (61), the smooth rod (642) passes through the through hole (623) of the sleeve (62), the second stop surface (643) of the slide rod (64) is in contact with the first stop surface (627) of the sleeve (62), and the positioning rod (645) of the slide rod (64) passes through the positioning hole (632) of the push rod (63).

2. The shaft tail seal non-destructive assembly tooling assembly according to claim 1, characterized in that, The expansion section (621) of the sleeve (62) mates with the expansion sleeve (61); the positioning section (622) of the sleeve (62) mates with the drive gear (4); the through hole (623) of the sleeve (62) and the smooth rod (642) of the slide rod (64) are clearance fit, allowing for smooth passage; the opening groove (624) and the annular groove (625) of the sleeve (62) ensure that the expansion section (621) of the sleeve (62) can deform; the conical surface (626) of the sleeve (62) ensures that the shaft tail seal (3) is in place during assembly. The process of smooth deformation enables non-destructive assembly; the rotating slide rod (64) ensures the smooth movement of the expansion sleeve (61) in the sleeve (62); as the expansion sleeve (61) slides in the sleeve (62), the expansion section (621) of the sleeve (62) deforms, and the fit with the inner hole of the drive gear (4) changes from clearance fit to interference fit, which serves to fix the tooling assembly (60); the positioning section (622) is set with the inner hole of the drive gear (4) with clearance fit, which serves to position the sleeve (62).

3. The shaft tail seal non-destructive assembly tooling assembly according to claim 1, characterized in that, The positioning hole (632) of the push rod (63) and the positioning rod (645) of the slide rod (64) are clearance fit; when the sleeve (62) and the drive gear (4) are interference fit, the push rod (63) is pushed, and the push rod (63) pushes the shaft tail force seal (3) to the mounting hole.

4. The shaft tail seal non-destructive assembly tooling assembly according to claim 1, characterized in that, The thread length of the external thread (641) of the slide rod (64) is 3-5 mm longer than the thread length of the internal thread (612) of the expansion sleeve (61); the smooth rod (642) of the slide rod (64) and the through hole (623) of the sleeve (62) are clearance fit; the hexagonal part (644) of the slide rod (64) plays a tightening role, and tightening the hexagonal part (644) of the slide rod (64) with a wrench ensures that the expansion sleeve (61) slides in the sleeve (62); the positioning rod (645) of the slide rod (64) plays a positioning role for the push rod (63).

5. The shaft tail seal non-destructive assembly tooling assembly according to claim 1, characterized in that, When assembling the shaft tail seal (3), the expansion sleeve (61), sleeve (62), and slide rod (64) are inserted into the inner hole of the drive gear (4) as a whole. At this time, the drive gear (4) and the non-destructive assembly tooling assembly (60) are in clearance fit. By rotating the slide rod (64), the expansion sleeve (61) slides toward the sleeve (62). As the expansion sleeve (61) slides, the fit between the non-destructive assembly tooling assembly (60) and the inner hole of the drive gear (4) gradually changes from clearance fit to interference fit. At this time, the non-destructive assembly tooling assembly (60) and the inner hole of the drive gear (4) are fixed. Place the tail seal (3) on the conical surface of the sleeve (62), and put the push rod (63) onto the slide rod (64), and push the push rod (63) until the tail seal (3) is assembled into the stop position.

6. The shaft tail seal non-destructive assembly tooling assembly according to claim 1, characterized in that, After assembly, remove the push rod (63) and rotate the slide rod (64) in the opposite direction. The fit between the non-destructive assembly tooling assembly (60) and the inner hole of the drive gear (4) gradually changes from an interference fit to a clearance fit. Remove the non-destructive assembly tooling assembly (60).

7. The shaft tail seal non-destructive assembly tooling assembly according to claim 1, characterized in that, L1 is the length of the expansion sleeve (61), L1 = 8~10mm; L2 is the length of the conical hole in the expansion section (621) of the sleeve (62), L2-L1=3~5mm; L3 is the length of the annular groove (625) of the sleeve (62), L3 = 2~3mm; L4 is the length from one end of the conical surface two (626) of the sleeve (62) to the stop surface one (627), L5 is the total length of the sleeve (62), L9 is the length of the outer hexagon (644) of the sliding rod (64), L6-L4-L9=5~8mm; L7 is the length of the external thread (641) of the slide rod (64), L7-L1=3~5mm; L8 is the total length of the external thread (641) of the sliding rod (64) and the smooth rod (642), L8=L5; L10 is the length of the positioning rod (645) of the slide rod (64), L10 = 20~30mm.

8. The shaft tail seal non-destructive assembly tooling assembly according to claim 1, characterized in that, φ1 is the angle of the conical surface (613) of the expansion sleeve (61), and φ2 is the angle of the conical hole of the expansion section (621) of the sleeve (62). The dimensions of φ1 and φ2 are consistent, and the clearance fit is guaranteed by tolerance.

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