Combined machining tool and machining method for output shaft of starter

Abstract

The invention belongs to the technical field of machining, and provides a starter output shaft combined machining tool which comprises a base and a top shaft. A snap ring; the device comprises a base, a locking screw sleeve, an adjusting rod, an adjusting rod, a screw and a plug, the base is provided with three supporting seats which are axially arranged, the supporting seat on the front side of the base is provided with a top shaft, the supporting seat in the middle of the base is matched with a clamping ring which can be detached from the base to support and fix a machined output shaft, and the supporting seat on the rear side of the base is provided with the locking screw sleeve; the top shaft is used for limiting the end part of the processed output shaft in the forward direction and the radial direction; the locking screw sleeve is of a cylinder structure with an internal unthreaded hole, and the cylindrical shape of the front end of the locking screw sleeve can directly conduct backward limiting on the top face of a limiting spline outside a pull rod of the machined output shaft. After the plug is mounted in an internal unthreaded hole of the locking threaded sleeve, the rear end of the plug is limited by the locking threaded sleeve, and the front end of the plug can limit a pull rod of the processed output shaft backwards; the adjusting rod can penetrate through an unthreaded hole in the locking threaded sleeve, a U-shaped groove is formed in the front end of the adjusting rod, and the U-shaped groove can be matched with a pull rod of the machined output shaft and a positioning pin between the pull rod outer limiting spline, so that the pull rod of the machined output shaft rotates along with the adjusting rod when the adjusting rod rotates. According to the tool and the tool method, the two-section type combined output shaft can be stably fixed, so that the two sections of output shafts do not rotate relatively in the machining process and do not move in all directions, and the machining precision is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and relates to a processing method of an output shaft assembly, and in particular to a combined processing tool and a processing method of an output shaft for a starter. Background Art

[0002] The starter for aircraft engines is a high-power density mechanical device used to drive aircraft engines to achieve starting, cold running and oil seal unsealing. The starter transmits the amplified torque to the engine accessory gearbox through the output shaft assembly to achieve the above functions. In order to ensure the safety of the joint operation of the starter and the engine, the starter usually needs to consider the back-belt protection design, so the output shaft needs to be designed as a split mechanism, and a mechanical connection is used in the middle to ensure use under normal working conditions.

[0003] When the starter output shaft adopts a split design, one end of the shaft is used to connect to the starter body, and the other end is connected to the engine accessory gearbox to complete the task of driving the engine. The connection of the split structure usually adopts the method of positioning preload or constant pressure preload. The positioning preload method usually uses a screw to directly connect the two ends of the starter output shaft together. When backlash occurs, the output shaft assembly slips along the profile and separates axially. At this time, the rigid screw will be pulled and broken, so that the output shaft assembly is completely disengaged to prevent backlash. However, this connection method is prone to loose connection in a long-term vibration environment, which reduces the connection reliability of the output shaft assembly and induces failures.

[0004] The constant pressure preload method is to tighten the output shafts at both ends through elastic elements, which can effectively increase the durability of the output shaft assembly. The pull rod, which plays a connecting role, is fixed to one end of the output shaft assembly and connected to the elastic element at the other end. The elastic element then drives the other section of the output shaft to tighten and complete the connection. In order to enable the output shaft assembly to be separated when reversed, it is necessary to add a circumferential rotation constraint at one end of the pull rod connected to the spring, so that the pull rod can be twisted off when reversed, and the shaft assembly can be completely separated.

[0005] The split-design output shaft assembly adopts profile matching between the two shaft sections to enhance the load-bearing capacity of the output shaft assembly and ensure the reliability of disengagement under reverse belt working conditions. However, the complex profile processing tolerance is difficult to control, resulting in difficulty in positioning the connectors of the two shaft sections of the output shaft assembly when constant pressure preload is used, and difficulty in positioning the pull rod and spring. When the constraint of the circumferential rotation of the pull rod needs to be processed, it is difficult to determine the constraint positioning hole after disassembly and assembly, and the effect of direct assembly cannot be achieved through simple precision control, resulting in a decrease in the qualified rate of parts, difficulty in assembly, and a significant increase in production costs. Summary of the invention

[0006] Purpose of the invention: The present invention designs a tooling for combined processing of an auxiliary starter output shaft. The design adopts a combined processing method, the parts are pre-installed in place, the positioning holes are processed under the clamping conditions of the tooling, and the final assembly is completed after cleaning under the guarantee of the tooling to reduce the production difficulty and improve production efficiency.

[0007] The technical solution of the present invention is as follows:

[0008] A combined processing tool for the output shaft of a starter, comprising a base, a top shaft; a snap ring; a locking screw sleeve, an adjusting rod, an adjusting rod, a screw and a plug. The base has three axially arranged support seats, the top shaft is installed on the support seat at the front side of the base, the support seat in the middle of the base cooperates with the snap ring that can be removed from the base to support and fix the processed output shaft, and the locking screw sleeve is installed on the support seat at the rear side of the base; the top shaft limits the end of the processed output shaft forward and radially; the locking screw sleeve is a cylindrical structure with an internal light hole, and the front end of the locking screw sleeve The cylindrical shape can directly limit the top surface of the limit spline outside the pull rod of the processed output shaft backward; after the plug is installed in the internal light hole of the locking screw sleeve, the rear end of the plug is limited by the locking screw sleeve, and the front end of the plug can limit the pull rod of the processed output shaft backward; the adjusting rod can pass through the internal light hole of the locking screw sleeve, and the front end of the adjusting rod has a U-shaped groove, and the U-shaped groove can cooperate with the locating pin between the pull rod of the processed output shaft and the limit spline outside the pull rod, so that when the adjusting rod rotates, the pull rod of the processed output shaft follows the rotation.

[0009] Furthermore, the front support seat of the base is a smooth hole, and the top shaft is a front and rear stepped shaft. The top shaft is directly placed in the front support seat of the base. The front support seat limits the top shaft forward, and the top shaft is pressed into the large blind hole at the end of the processed output shaft, and the size and shape of the top shaft match the large blind hole at the end of the processed output shaft.

[0010] Furthermore, it also includes an adjusting rod, a through hole is opened in the center of the top shaft, and the radial position of the through hole is the same as the radial pull rod position of the processed output shaft; the adjusting rod can pass through the through hole in the center of the top shaft to eject the pull rod of the processed output shaft.

[0011] Furthermore, a radial hole is provided at the rear end of the adjusting rod, and the outer diameter of the adjusting rod matches the inner diameter of the radial hole of the adjusting rod. When the circumferential angle of the pull rod of the processed output shaft is adjusted by the adjusting rod, the adjusting rod is installed in the radial hole of the adjusting rod and serves as a handle for rotating the adjusting rod.

[0012] Furthermore, the support seat in the middle of the base is supported on the middle surface matching of the two sections of the processed output shaft. After the retaining ring is installed on the support seat in the middle of the base, the radial position and axial position of the two sections of the processed output shaft are fixed, and the circumferential position of the two sections of the shaft is fixed by the surface matching of the two sections of the shaft themselves.

[0013] Furthermore, the support seat on the rear side of the base is an internal threaded hole seat, and the locking screw sleeve is a stepped shaft body with external threads. The locking screw sleeve is installed in the support seat on the rear side of the base through threaded cooperation, and the locking screw sleeve can move axially in the support seat on the rear side of the base through threaded cooperation.

[0014] Furthermore, the outer side of the rear end of the locking nut sleeve has a hexagonal surface.

[0015] A method for combined processing of an output shaft for a starter, using the combined processing tool for an output shaft for a starter, comprises the following steps:

[0016] S1: Install a top shaft on the base, then push the two sections of the processed output shaft outside the top shaft, and fix the combined part of the two sections on the base;

[0017] S2: Install the snap ring to fix the two shaft sections of the processed output shaft;

[0018] S3: Install the pull rod assembly inside the processed output shaft from the rear side of the processed output shaft, and then screw the combination of the plug and the locking nut into the base to limit the pull rod assembly;

[0019] S4: Processing the radial positioning pin hole of the output shaft, the positioning pin hole passes through the shaft body and the pull rod of the output shaft;

[0020] S5: Remove the combination of the plug and the locking nut, push out the tie rod assembly from the top shaft side, and then clean the metal chips;

[0021] S6: Reinstall the tie rod assembly into the output shaft from the rear side, and then screw the locking nut into the base to limit the top surface of the limit spline in the tie rod assembly;

[0022] S7: Insert the adjusting rod into the output shaft from the inner hole of the locking nut sleeve so that the U-shaped groove of the adjusting rod is stuck outside the positioning pin between the pull rod and the limit spline;

[0023] S8: The circumferential angle of the pull rod is adjusted by rotating the adjusting rod so that the shaft body processed in S4 and the positioning pin hole of the pull rod are coaxial, and then the pin is inserted into the coaxial positioning pin hole.

[0024] Beneficial effects of the present invention:

[0025] 1. The tooling and tooling method of the present invention can stably fix the two-section combined output shaft, so that the two-section output shaft will not rotate relative to each other or move in all directions during the processing, thereby ensuring the processing accuracy.

[0026] 2. The locking screw sleeve of the present invention can cooperate with the plug and the adjusting rod at the same time. When cooperating with the plug, it can complete the axial positioning of the pull rod for combined processing; when cooperating with the adjusting rod, the angular position of the pull rod can be adjusted to make the pull rod coaxial with the positioning pin hole on the shaft body for assembly after cleaning the parts.

[0027] 3. The adjustment rod of the present invention has the effect of flexible configuration. It can be used to disassemble the output shaft assembly, push out the pull rod assembly through the top shaft hole for cleaning, and can also be used to cooperate with the adjustment rod to provide more convenient operating conditions and adjust the relative position of the pull rod and the shaft positioning hole.

[0028] 4. The tooling and tooling method of the present invention can conveniently complete the combined processing, cleaning and secondary assembly of the starter output shaft assembly, simplify the production process and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the implementation method of the patent of the present invention, the following is a brief introduction to the drawings required for use in the implementation method. It should be understood that the following drawings only show certain embodiments of the patent of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the assembly of the output shaft assembly combined processing tooling and the output shaft assembly when the output shaft assembly is reassembled;

[0031] Figure 2 It is a top view of the assembly of the tooling and the output shaft assembly;

[0032] Figure 3 It is a schematic diagram of the assembly of the output shaft assembly of the output shaft combination processing tool in the combination processing step;

[0033] Figure 4 It is a schematic diagram of the pull rod and limit pin structure of the output shaft assembly.

[0034] Among them: 1-base; 2-top shaft; 3-circlip; 4-locking nut; 5-adjusting rod; 6-adjusting rod; 7-screw; 8-plug. DETAILED DESCRIPTION

[0035] This section is an embodiment of the present invention, which is used to explain and illustrate the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships as given in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or case referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a mechanical connection or a point connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0038] Embodiment 1:

[0039] A combined processing tool for an output shaft of a starter, comprising a base 1, a top shaft 2; a snap ring 3; a locking screw sleeve 4, an adjusting rod 5, an adjusting rod 6, a screw 7 and a plug 8. The base 1 has three axially arranged support seats, the top shaft 2 is installed on the support seat on the front side of the base 1, the middle support seat of the base 1 cooperates with the snap ring 3 which can be removed from the base 1 to support and fix the processed output shaft, and the locking screw sleeve 4 is installed on the support seat on the rear side of the base 1; the top shaft 2 limits the end of the processed output shaft forward and radially; the locking screw sleeve 4 is a cylindrical structure with an internal light hole, and the locking screw sleeve 4 is a cylindrical structure with an internal light hole. The cylindrical shape of the front end of the sleeve 4 can directly limit the top surface of the limiting spline outside the pull rod of the processed output shaft backward; after the plug 8 is installed in the internal light hole of the locking screw sleeve 4, the rear end of the plug 8 is limited by the locking screw sleeve 4, and the front end of the plug 8 can limit the pull rod of the processed output shaft backward; the adjusting rod 5 can pass through the internal light hole of the locking screw sleeve 4, and the front end of the adjusting rod 5 has a U-shaped groove, and the U-shaped groove can cooperate with the locating pin between the pull rod of the processed output shaft and the limiting spline outside the pull rod, so that when the adjusting rod 5 rotates, the pull rod of the processed output shaft follows the rotation.

[0040] Furthermore, the front support seat of the base 1 is a smooth hole, and the top shaft 2 is a front and rear stepped shaft. The top shaft 2 is directly placed in the front support seat of the base 1. The front support seat limits the forward position of the top shaft 2. The top shaft 2 is pressed against the large blind hole at the end of the processed output shaft, and the size and shape of the top shaft 2 match the large blind hole at the end of the processed output shaft.

[0041] Furthermore, it also includes an adjusting rod 6. A through hole is opened in the center of the top shaft 2, and the radial position of the through hole is the same as the radial pull rod position of the processed output shaft; the adjusting rod 6 can pass through the through hole in the center of the top shaft 2 to eject the pull rod of the processed output shaft.

[0042] Furthermore, a radial hole is provided at the rear end of the adjusting rod 5, and the outer diameter of the adjusting rod 6 matches the inner diameter of the radial hole of the adjusting rod 5. When the circumferential angle of the pull rod of the processed output shaft is adjusted by the adjusting rod 5, the adjusting rod 6 is installed in the radial hole of the adjusting rod 5 and serves as a handle for rotating the adjusting rod 5.

[0043] Furthermore, the support seat in the middle of the base 1 is supported at the middle surface matching of the two sections of the processed output shaft. After the retaining ring 3 is installed on the support seat in the middle of the base 1, the radial position and axial position of the two sections of the processed output shaft are fixed, and the circumferential position of the two sections of the shaft is fixed by the surface matching of the two sections of the shaft themselves.

[0044] Furthermore, the support seat on the rear side of the base 1 is an internal threaded hole seat, and the locking screw sleeve 4 is a stepped shaft body with external threads. The locking screw sleeve 4 is installed in the support seat on the rear side of the base 1 through threaded cooperation, and the locking screw sleeve 4 can move axially in the support seat on the rear side of the base 1 through threaded cooperation.

[0045] Furthermore, the outer side of the rear end of the locking nut sleeve 4 has a hexagonal surface.

[0046] A method for combined processing of an output shaft for a starter, using the combined processing tool for an output shaft for a starter, comprises the following steps:

[0047] S1: Install a top shaft on the base, then push the two sections of the processed output shaft outside the top shaft, and fix the combined part of the two sections on the base;

[0048] S2: Install the snap ring to fix the two shaft sections of the processed output shaft;

[0049] S3: Install the pull rod assembly inside the processed output shaft from the rear side of the processed output shaft, and then screw the combination of the plug and the locking nut into the base to limit the pull rod assembly;

[0050] S4: Processing the radial positioning pin hole of the output shaft, the positioning pin hole passes through the shaft body and the pull rod of the output shaft;

[0051] S5: Remove the combination of the plug and the locking nut, push out the tie rod assembly from the top shaft side, and then clean the metal chips;

[0052] S6: Reinstall the tie rod assembly into the output shaft from the rear side, and then screw the locking nut into the base to limit the top surface of the limit spline in the tie rod assembly;

[0053] S7: Insert the adjusting rod into the output shaft from the inner hole of the locking nut sleeve so that the U-shaped groove of the adjusting rod is stuck outside the positioning pin between the pull rod and the limit spline;

[0054] S8: The circumferential angle of the pull rod is adjusted by rotating the adjusting rod so that the shaft body processed in S4 and the positioning pin hole of the pull rod are coaxial, and then the pin is inserted into the coaxial positioning pin hole.

[0055] Embodiment 2:

[0056] A starter output shaft combined processing tool comprises: a base, a top shaft, a clamping ring, a locking screw sleeve, an adjusting rod, a hexagon socket cylindrical head screw and an adjusting rod.

[0057] The base is a supporting structure used to fix other parts and clamp. The base has a round hole, and the top shaft is connected to the base through a shoulder. The snap ring is connected to the base through a hexagon socket head screw. The locking screw sleeve is connected to the base through a threaded hole on the base. The adjustment rod passes through the central opening of the locking screw sleeve to adjust the assembly. The adjustment rod passes through the opening of the adjustment rod and is used to rotate the adjustment rod. It can be removed separately for disassembling the output shaft assembly.

[0058] The base is a "mountain" structure, with a circular hole on the left vertical plate for fixing the top shaft. The middle vertical plate is lower than the vertical plates on both sides, and a semicircular hole is opened along the top edge of the vertical plate. The semicircular hole is coaxial with the circular hole on the left vertical plate and is used to support the output shaft assembly, and screw holes are opened on both sides of the semicircular hole of the vertical plate for installing hexagonal cylindrical head screws; a circular hole is opened on the bottom plate clamped by the left and middle vertical plates to prevent interference between the cylindrical pin and the tooling when removing the cylindrical pin of the output shaft assembly; a threaded hole is opened in the center of the vertical plate on the right end of the bottom plate, and the threaded hole is coaxial with the holes on the left and middle vertical plates and is used to install a locking screw sleeve.

[0059] The top shaft is a left and right stepped shaft with smaller diameters at both ends. The left stepped shaft is used to connect and position with the base, and the right stepped shaft is used to connect with the output shaft assembly to provide axial and radial positioning. A through hole is opened in the center for use when disassembling the output shaft assembly.

[0060] The middle of the clamping ring is a semicircular ring with the same diameter as the semicircular hole of the middle vertical plate of the base. The ears at both ends are provided with countersunk holes and are connected to the middle vertical plate of the base by hexagon socket head screws for stirrup output shaft assembly.

[0061] The locking screw sleeve is a combination of a stepped shaft body and a hexagonal body, with a through hole in the center. At the minimum shaft diameter on the left end, the diameter matches the top surface of the limit spline of the output shaft assembly. The middle shaft body is threaded on the outside for connection with the base. The right end is designed with a hexagonal body for turning the locking screw sleeve to tighten the output shaft assembly.

[0062] A symmetrical U-shaped groove is opened at the left end of the adjusting rod along the axial direction, which is used to clamp the output shaft assembly pull rod positioning pin to rotate the output shaft assembly pull rod.

[0063] The adjusting rod passes through the adjusting rod to provide operating torque, and the adjusting rod can cooperate with the top shaft and pass through the center hole of the top shaft to remove the pull rod inside the output shaft assembly.

[0064] The plug is a shoulder structure, one end of which is flush with the part and the other end is inserted into the tooling for fixation.

[0065] Embodiment 3:

[0066] See also Figure 1 , Figure 2 and Figure 3 A combined processing tool for an output shaft assembly for a starter includes: a base 1, a top shaft 2; a retaining ring 3; a locking screw sleeve 4; an adjusting rod 5; an adjusting rod 6; a screw 7; and a plug 8.

[0067] Among them, the shoulder on one side of the top shaft 2 is matched with a small gap between the circular hole set in the base 1, the spline inner hole of the output shaft assembly adapter shaft is matched with the shoulder on the other side of the top shaft 2, and the matching end surface of the top shaft 2 and the output shaft assembly is matched with the bottom surface of the adapter shaft hole to achieve axial positioning of the adapter shaft and the fastening rod, and the center hole set in the top shaft 2 is coaxial with the fastening rod;

[0068] The semicircular hole of the middle vertical plate of the base 1 cooperates with the output shaft assembly, and the position of the vertical plate is aligned with the split structure of the output shaft assembly, which can provide support for the split section of the output shaft assembly and fix the radial position of the output shaft assembly.

[0069] The retaining ring 3 cooperates with the semicircular hole of the base 1 to form a circular hole to fix the output shaft assembly and limit the movement of the output shaft assembly. The diameter of the retaining ring 3 and the semicircular hole of the base 1 is slightly smaller than the diameter of the split section of the output shaft assembly to ensure that the output shaft assembly is completely fixed and will not be displaced when tightened.

[0070] The screw 7 passes through the screw hole of the clamp ring 3 and is installed in the screw hole of the base 1 to connect the clamp ring 3 and the base 1 to form a whole and clamp the output shaft assembly.

[0071] The locking nut 4 is connected to the base 1 via a thread, and the axial position of the locking nut 4 on the base 1 can be adjusted by rotating the locking nut 4 .

[0072] When installing the output shaft assembly, tighten it toward one side of the top shaft 2, and tighten the screw 7 to lock the clamping ring 3. At this time, the output shaft assembly is axially fixed.

[0073] During combined processing, the component to be processed is fixed on the base by the retaining ring 3, the plug 8 is installed into the center hole of the locking nut 4, and the locking nut 4 is tightened. The plug 8 will tighten the output shaft assembly pull rod so that the other end of the pull rod is in close contact with the end surface of the top shaft 2, completing the fixation of the pull rod. At this time, the combined processing can be carried out by drilling or electrical machining.

[0074] After the assembly process, the output shaft assembly needs to be disassembled and the inside needs to be cleaned. At this time, the locking nut 4 is rotated in the opposite direction, and the plug 8 is separated from the output shaft assembly. The locking nut 4 and the plug 8 are removed in turn, and the adjustment rod 6 is used to push out the pull rod and other parts inside the output shaft assembly along the center hole set on the top shaft 2. After cleaning, assembly can be carried out.

[0075] After the assembly machine, the parts of the output shaft assembly already have a relative positional relationship. At this time, assemble the output shaft assembly, place the output shaft assembly on the tooling, push it in the direction of the top shaft 2, and then tighten the retaining ring 3 by tightening the screws 7 to complete the positioning of the output shaft assembly.

[0076] Screw the locking nut 4 into the base 1, tighten the locking nut 4 so that the output shaft tie rod can be supported on the top shaft 2, then insert the adjustment rod 6 into the adjustment rod 5, and then insert the adjustment rod 5 through the hole set in the center of the locking nut, match the U-shaped slot of the adjustment rod 5 with the limit pin on the output shaft tie rod, rotate the adjustment rod 5 until the combined processing hole on the output shaft tie rod is aligned with the combined processing hole of the output shaft assembly adapter shaft, and then press the cylindrical pin along the combined processing hole to complete the reinstallation of the output shaft assembly. Remove the adjustment rod 5, locking nut 4, screw 7 and snap ring 3 in sequence, and then remove the output shaft assembly.

[0077] The above is only a specific embodiment of the present invention, and the present invention is described in detail. The unexplained part is a conventional technology. However, the protection scope of the present invention is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A starter output shaft assembly processing tool, characterized in that: The invention comprises a base (1), a top shaft (2); a snap ring (3); a locking screw sleeve (4), an adjusting rod (5), an adjusting rod (6), a screw (7) and a plug (8); the base (1) has three axially arranged support seats, the top shaft (2) is installed on the support seat at the front side of the base (1), the middle support seat of the base (1) cooperates with the snap ring (3) which can be removed from the base (1) to support and fix the processed output shaft, and the locking screw sleeve (4) is installed on the support seat at the rear side of the base (1); the top shaft (2) limits the end of the processed output shaft in the forward and radial directions; the locking screw sleeve (4) is a cylindrical structure with an internal light hole, and the locking screw sleeve (4) is a cylindrical structure with an internal light hole. The cylindrical shape of the front end of the sleeve (4) can directly limit the top surface of the limit spline outside the pull rod of the processed output shaft backward; after the plug (8) is installed in the internal light hole of the locking screw sleeve (4), the rear end of the plug (8) is limited by the locking screw sleeve (4), and the front end of the plug (8) can limit the pull rod of the processed output shaft backward; the adjustment rod (5) can pass through the internal light hole of the locking screw sleeve (4), and the front end of the adjustment rod (5) has a U-shaped groove, which can cooperate with the positioning pin between the pull rod of the processed output shaft and the limit spline outside the pull rod, so that when the adjustment rod (5) rotates, the pull rod of the processed output shaft rotates with it.

2. The combined processing tool for the output shaft of a starter according to claim 1, characterized in that: The front support seat of the base (1) is a light hole, the top shaft (2) is a front and rear stepped shaft, the top shaft (2) is directly placed in the front support seat of the base (1), the front support seat limits the top shaft (2) forward, the top shaft (2) is pressed in the large blind hole at the end of the processed output shaft, and the size and shape of the top shaft (2) match the large blind hole at the end of the processed output shaft.

3. The combined processing tool for the output shaft of a starter according to claim 2, characterized in that: It also includes an adjusting rod (6). A through hole is opened at the center of the top shaft (2). The radial position of the through hole is the same as the radial position of the pull rod of the processed output shaft. The adjusting rod (6) can pass through the through hole at the center of the top shaft (2) to push out the pull rod of the processed output shaft.

4. The combined processing tool for the output shaft of a starter according to claim 1, characterized in that: A radial hole is provided at the rear end of the adjusting rod (5), and the outer diameter of the adjusting rod (6) matches the inner diameter of the radial hole of the adjusting rod (5). When the circumferential angle of the pull rod of the processed output shaft is adjusted by the adjusting rod (5), the adjusting rod (6) is installed in the radial hole of the adjusting rod (5) and serves as a handle for rotating the adjusting rod (5).

5. The combined processing tool for the output shaft of a starter according to claim 1, characterized in that: The support seat in the middle of the base (1) is supported at the middle profile matching position of the two shaft sections of the processed output shaft. After the clamping ring (3) is installed on the support seat in the middle of the base (1), the radial position and axial position of the two shaft sections of the processed output shaft are fixed, and the circumferential position of the two shaft sections is fixed by the profile matching of the two shaft sections themselves.

6. The combined processing tool for the output shaft of the starter according to claim 5, characterized in that: The support seat at the rear side of the base (1) is an internal thread hole seat, the locking screw sleeve (4) is a stepped shaft body with external threads, the locking screw sleeve (4) is installed in the support seat at the rear side of the base (1) through threaded matching, and the locking screw sleeve (4) can move axially in the support seat at the rear side of the base (1) through threaded matching.

7. The combined processing tool for the output shaft of the starter according to claim 6, characterized in that: The outer side of the rear end of the locking nut sleeve (4) has a hexagonal profile.

8. A method for combined processing of a starter output shaft, using the combined processing tool for a starter output shaft as claimed in claim 1, comprising the following steps: S1: Install a top shaft on the base, then push the two sections of the processed output shaft outside the top shaft, and fix the combined part of the two sections on the base; S2: Install the snap ring to fix the two shaft sections of the processed output shaft; S3: Install the pull rod assembly inside the processed output shaft from the rear side of the processed output shaft, and then screw the combination of the plug and the locking nut into the base to limit the pull rod assembly; S4: Processing the radial positioning pin hole of the output shaft, the positioning pin hole passes through the shaft body and the pull rod of the output shaft; S5: Remove the combination of the plug and the locking nut, push out the tie rod assembly from the top shaft side, and then clean the metal chips; S6: Reinstall the tie rod assembly into the output shaft from the rear side, and then screw the locking nut into the base to limit the top surface of the limit spline in the tie rod assembly; S7: Insert the adjusting rod into the output shaft from the inner hole of the locking nut sleeve so that the U-shaped groove of the adjusting rod is stuck outside the positioning pin between the pull rod and the limit spline; S8: The circumferential angle of the pull rod is adjusted by rotating the adjusting rod so that the shaft body processed in S4 and the positioning pin hole of the pull rod are coaxial, and then the pin is inserted into the coaxial positioning pin hole.

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